From aboudouvas at panafonet.gr  Fri Jan  5 17:03:17 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 5 Jan 2007 14:03:17 -0800
Subject: program deployment
In-Reply-To: <1168023319.644237.273240@v33g2000cwv.googlegroups.com>
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
	<12psqtppgi5cme6@corp.supernews.com>
	<1168010377.179056.220500@s80g2000cwa.googlegroups.com>
	<1168012877.398078.59120@s80g2000cwa.googlegroups.com>
	<1168013279.634426.84110@s80g2000cwa.googlegroups.com>
	<1168023319.644237.273240@v33g2000cwv.googlegroups.com>
Message-ID: <1168034597.210502.51990@s80g2000cwa.googlegroups.com>



> Of course you do not distribute .cs (or .vb) files when deploying your
> application, but decompilers for .NET are plenty. Same for Java.

Yes, but in .Net we have some strong dotfuscators that makes reverse
engineer really difficult.
In any way, it is not so easy to get to the source as .py files is.



From nmm1 at cus.cam.ac.uk  Wed Jan 17 09:24:53 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 17 Jan 2007 14:24:53 GMT
Subject: Number methods
Message-ID: <eolbjl$12n$1@gemini.csx.cam.ac.uk>


I can't find any description of these.  Most are obvious, but some
are not.  Note that this is from the point of view of IMPLEMENTING
them, not USING them.  Specifically:

Does Python use classic division (nb_divide) and inversion (nb_invert)
or are they entirely historical?  Note that I can very easily provide
the latter.

Is there any documentation on the coercion function (nb_coerce)?  It
seems to have unusual properties.

Thanks for any hints.


Regards,
Nick Maclaren.


From bdesth.quelquechose at free.quelquepart.fr  Tue Jan  2 17:22:10 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 02 Jan 2007 23:22:10 +0100
Subject: array of class
In-Reply-To: <mailman.2221.1167763760.32031.python-list@python.org>
References: <mailman.2221.1167763760.32031.python-list@python.org>
Message-ID: <459ad4f7$0$293$426a34cc@news.free.fr>

mm a ?crit :
> 
> How can I do a array of class?

s/array/list/

> s1=[]  ## this array should hold classes
> 
> ## class definition
> class Word:
>   word=""
> 
> 
> ## empty words... INIT
> for i in range(100):  ## 0..99
>   s1.append(Wort)

I guess that s/Wort/Word/

> s1[0].word="There"
> s1[1].word="should"
> s1[2].word="be"
> s1[3].word="different"
> s1[4].word="classes"
> 
> ... but it's not.

Err... Are you sure you really understand what's a class is and how it's 
supposed to be used ?

> 
> print s1
> ------------
> [<class __main__.Wort at 0x7ff1492c>,
> <class __main__.Wort at 0x7ff1492c>,
> <class __main__.Wort at 0x7ff1492c>,
> <class __main__.Wort at 0x7ff1492c>,
> <class __main__.Wort at 0x7ff1492c>,
> <class __main__.Wort at 0x7ff1492c>,
> ........
> -----------
> 
> Here, this "classes" are all at the same position in memory.

Of course. You created a list of 100 references to the same class.

> So there 
> are no different classes in the array.

How could it be ? When did you put another class in the list ?

> So I access with s1[0], s1[1], s1[2], etc. always the same data.

Of course.

> Any idea?

Yes : read something about OO base concepts like classes and instances, 
then read the Python's tutorial about how these concepts are implemented 
in Python.

FWIW, I guess that what you want here may looks like this:

class Word(object):
   def __init__(self, word=''):
     self._word = word
   def __repr__(self):
     return "<Word %s at %d>" % (self._word, id(self))


words = []
for w in ['this', 'is', 'probably', 'what', 'you', 'want']:
   words.append(Word(w))
print words


From steve at holdenweb.com  Mon Jan 29 08:22:41 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 29 Jan 2007 13:22:41 +0000
Subject: PythonCard installation
In-Reply-To: <1169557284.833325.305590@k78g2000cwa.googlegroups.com>
References: <1169557284.833325.305590@k78g2000cwa.googlegroups.com>
Message-ID: <epkseu$8r3$2@sea.gmane.org>

dudds wrote:
> Anyone had any joy with this using FC6?? When I try to run code editor
> I get the error "Traceback (most recent call last):
>   File
> "/usr/lib/python2.4/PythonCard-0.8.2/tools/codeEditor/codeEditor.py",
> line 13, in ?
>     from PythonCard import about, configuration, dialog, log, menu,
> model, resource, util
> ImportError: No module named PythonCard"
> 
This isn't really a platform-specific issue - you just need to install 
PythonCard so that the interpreter can find it.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From berteun at gmail.com  Fri Jan 19 09:28:10 2007
From: berteun at gmail.com (Berteun Damman)
Date: 19 Jan 2007 06:28:10 -0800
Subject: PQueue and Python 2.5
Message-ID: <1169216890.617239.209170@51g2000cwl.googlegroups.com>

Hello,

Recently I was looking for a Priority Queue module, and I've found
Pqueue by Andrew Snare [1]. When I use it with Python 2.4 everything
works okay, at least on the two system I've tested it on (Debian based
AMD 64) and OS PPC.

However, when I use it with Python 2.5 - again on the same machines,
exiting always gives a pointer error. The easiest to demonstrate this
is:

python2.5 -c 'from pqueue import PQueue; PQueue()'

On the Debian system:
$ python2.5 -c 'from pqueue import PQueue; PQueue()'
*** glibc detected *** free(): invalid pointer: 0x00002ad7b5720288 ***
Abort

And on my PowerBook:
python2.5(8124) malloc: ***  Deallocation of a pointer not malloced:
0x3b4218; This could be a double free(), or free() called with the
middle of an allocated block;

A memory fault can also be immediately triggered by apply 'del' to a
PQueue-instance. As said, with Python 2.4 it seems to perform without
problems.

I haven't got a clue how to investigate this, but I would be willing to
help if someone has any ideas.

Berteun

[1] http://py.vaults.ca/apyllo.py/514463245.769244789.44776582



From paul.sijben at xs4all.nl  Wed Jan 10 06:41:38 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Wed, 10 Jan 2007 12:41:38 +0100
Subject: maximum number of threads
In-Reply-To: <mailman.2522.1168423062.32031.python-list@python.org>
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl>
	<mailman.2522.1168423062.32031.python-list@python.org>
Message-ID: <45A4D0F2.40001@xs4all.nl>

Gabriel Genellina wrote:
> 
> Simply you can't, as you can't have 10000 open files at once. Computer
> resources are not infinite.

sure but *how* fast they run out is the issue here

> Do you really need so many threads? 

I might be able to do with a few less but I still need many.

I have done a quick test.

on WinXP I can create 1030 threads
on Fedora Core 6 I can only create 301 (both python2.4 and 2.5)

now the 301 is rather low I'd say.

Paul


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan 15 08:40:02 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 15 Jan 2007 14:40:02 +0100
Subject: python and MOV or MPEG
References: <eoffha$epe2$1@zam602.zam.kfa-juelich.de>
	<510uf3F1i9oo6U1@mid.uni-berlin.de>
	<eofo2d$eqr9$1@zam602.zam.kfa-juelich.de>
Message-ID: <511ehiF1i1c86U1@mid.individual.net>

siggi wrote:

> Thanks, Diez.  I forgot to mention that I am learning Python with
> python 2.5 on WinXP. And both pymedia and pygame require somewhat
> older versions of python, 1.3 and 2.4, respectively.

1.3? I've found both for 2.4, and in one site's forum some guy
offers windows binaries for 2.5.

Regards,


Bj?rn

-- 
BOFH excuse #303:

fractal radiation jamming the backbone



From exarkun at divmod.com  Tue Jan 23 12:37:37 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 23 Jan 2007 12:37:37 -0500
Subject: smtplib starttls gmail example
In-Reply-To: <8yrth.1230$JB.276@trnddc05>
Message-ID: <20070123173737.17245.1391816005.divmod.quotient.9037@ohm>

On Tue, 23 Jan 2007 17:25:24 GMT, py <py at th.on> wrote:
>from smtplib import SMTP
>from socket import sslerror         #if desired
>server = SMTP('smtp.gmail.com')
>server.set_debuglevel(0) # or 1 for verbosity
>server.ehlo('youraddress at gmail.com')
>server.starttls()
>server.ehlo('youraddress at gmail.com')  # say hello again
>server.login('youraddress at gmail.com', 'yourpassword')
># i have a suspicion that smptlib does not add the required newline dot newline so i do it myself
>server.sendmail('youraddress at gmail.com', 're at cipient.com', message_text + '\n.\n')
># next line generates the ignorable socket.sslerror
>server.quit()
>

Or with Twisted:

  from twisted.internet.ssl import ClientContextFactory
  from twisted.internet.defer import Deferred
  from twisted.mail.smtp import ESMTPSenderFactory
  from twisted.internet import reactor

  contextFactory = ClientContextFactory()
  result = Deferred()
  factory = ESMTPSenderFactory('youraddress at gmail.com',
                               'your password',
                               'youraddress at gmail.com',
                               're at cipient.com',
                               messageText,
                               contextFactory=contextFactory)
  reactor.connectTCP('smtp.gmail.com', 25, factory)
  result.addCallback(lambda ign: reactor.stop())
  reactor.run()

Jean-Paul


From aisaac at american.edu  Thu Jan 25 17:54:35 2007
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 25 Jan 2007 22:54:35 GMT
Subject: stop script w/o exiting interpreter
Message-ID: <Lyauh.8689$QE6.2176@trnddc02>

I'm fairly new to Python and I've lately been running a script at
the interpreter while working on it.  Sometimes I only want to
run the first quarter or half etc.  What is the "good" way to do this?

Possible ugly hacks include:

- stick an undefined name at the desired stop point
- comment out the last half

I do not like these and assume that I have overlooked the obvious.

Thanks,
Alan Isaac




From postbox.holger at gmx.net  Mon Jan 22 08:05:00 2007
From: postbox.holger at gmx.net (Holger)
Date: Mon, 22 Jan 2007 14:05:00 +0100
Subject: Frequency spectrum with fft of a real valued array...?
References: <op.tlzy9djzu6qnye@krings>
	<mailman.2590.1168538928.32031.python-list@python.org>
Message-ID: <op.tmj3ytdhu6qnye@krings>

Hello Robert!

Thank you for your tips. They were very useful.

Bye Holger


Am 11.01.2007, 19:08 Uhr, schrieb Robert Kern <robert.kern at gmail.com>:

> Holger wrote:
>
>> What does it mean to me? How do I get to the wanted frequenca  
>> spectrum???
>
> It's packed in the conventional FFT format. Here is a function in numpy  
> (the
> successor to Numeric, which I assume that you are using) that generates  
> the
> corresponding frequencies in the same packed format:
>
> In [324]: import numpy
>
> In [325]: numpy.fft.fftfreq?
> Type:           function
> Base Class:     <type 'function'>
> Namespace:      Interactive
> File:
> /Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/numpy-1.0.2.dev3507-py2.5-macosx-10.4-i386.egg/numpy/fft/helper.py
> Definition:     numpy.fft.fftfreq(n, d=1.0)
> Docstring:
>     fftfreq(n, d=1.0) -> f
>
>     DFT sample frequencies
>
>     The returned float array contains the frequency bins in
>     cycles/unit (with zero at the start) given a window length n and a
>     sample spacing d:
>
>       f = [0,1,...,n/2-1,-n/2,...,-1]/(d*n)         if n is even
>       f = [0,1,...,(n-1)/2,-(n-1)/2,...,-1]/(d*n)   if n is odd
>
>



From sjdevnull at yahoo.com  Thu Jan 25 14:59:49 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 25 Jan 2007 11:59:49 -0800
Subject: Python does not play well with others
In-Reply-To: <wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
	<1169726842.719104.304300@v45g2000cwv.googlegroups.com>
	<wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
Message-ID: <1169755188.989078.75510@v33g2000cwv.googlegroups.com>

On Jan 25, 12:17 pm, John Nagle <n... at animats.com> wrote:
>     My main concern is with glue code to major packages.  The connections
> to OpenSSL, MySQL, and Apache (i.e. mod_python) all exist, but have major
> weaknesses.  If you're doing web applications, those are standard pieces
> which need to work right.  There's a tendency to treat those as abandonware
> and re-implement them as event-driven systems in Twisted.

In the real world I've worked on Python web apps at my last 3 jobs, and
they've all used mod_python and either MySQL or Postgres.  I haven't
had a need to do anything with OpenSSL from Python; all that takes
place in the Apache server (possibly with some mod_rewrite rules to
ensure that certain pages are only hit from https and so forth).

I think the impression that everyone's using some sexy new framework
like Django or TurboGears or Pylons on Twisted or lighttpd/wsgi is
pretty misleading, especially when it comes to companies with a
decent-size existing codebase (we're into the "fairly large" range with
about 325,000 lines of Python now--most is independent of the
architecture, but it'd still be an administratively sizeable
change)--the place I'm at currently is considering moving to
apache+wsgi, but that's a smaller change (and one that's been under
consideration for months now).



From daniele.varrazzo at gmail.com  Thu Jan 18 08:06:48 2007
From: daniele.varrazzo at gmail.com (Daniele Varrazzo)
Date: 18 Jan 2007 05:06:48 -0800
Subject: One more regular expressions question
In-Reply-To: <1169121609.571152.214850@11g2000cwr.googlegroups.com>
References: <1169113767.320500.71200@11g2000cwr.googlegroups.com>
	<1169120317.437211.73660@m58g2000cwm.googlegroups.com>
	<1169121609.571152.214850@11g2000cwr.googlegroups.com>
Message-ID: <1169125608.166197.164490@v45g2000cwv.googlegroups.com>

Victor Polukcht wrote:
> Great thanks.
>
> You post helped me so much!
>
> My resulting regexp is:
> "(?P<var1>^(.*)\s*)\(((?P<var2>\d+))\)\s+((?P<var3>\d+))"

Notice that this way you are including trailing whitespaces in the var1
group. You may want to put the "\s*" outside the parenthesis.

mmm... in this case you should make the ".*" in the first group
non-greedy. r"^(?P<var1>.*?)\s*\(((?P<var2>\d+))\)\s+((?P<var3>\d+))"
does the job.

Bye

Daniele



From gagsl-py at yahoo.com.ar  Thu Jan 25 20:39:29 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 25 Jan 2007 22:39:29 -0300
Subject: Pyparsing - Dealing with a Blank Value
In-Reply-To: <1169774005.890880.259830@j27g2000cwj.googlegroups.com>
References: <1169774005.890880.259830@j27g2000cwj.googlegroups.com>
Message-ID: <7.0.1.0.0.20070125223432.047c3dc8@yahoo.com.ar>

At Thursday 25/1/2007 22:13, Steve wrote:

>I've picked up the PyParsing module and am trying to figure out how to
>do a simple parsing of some HTML source code.  My specific problem is
>dealing with an <TD></TD> element that is blank.

Sorry for not answering your question exactly, but I'd use 
BeautifulSoup instead, it works even if the HTML is not well formed.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From skip at pobox.com  Tue Jan  2 21:49:09 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 2 Jan 2007 20:49:09 -0600
Subject: Iterate through list two items at a time
In-Reply-To: <1167791404.814286.80570@n51g2000cwc.googlegroups.com>
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
	<1167791404.814286.80570@n51g2000cwc.googlegroups.com>
Message-ID: <17819.6565.616462.795230@montanaro.dyndns.org>


    >> I'm looking for a way to iterate through a list, two (or more) items
    >> at a time.  Basically...
    >> 
    >> myList = [1,2,3,4,5,6]
    >> 
    >> I'd like to be able to pull out two items at a time...

    Dan> def pair_list(list_):
    Dan>     return [list_[i:i+2] for i in xrange(0, len(list_), 2)]

Here's another way (seems a bit clearer to me, but each person has their own
way of seeing things):

    >>> import string
    >>> string.letters
    'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
    >>> zip(string.letters[::2], string.letters[1::2])
    [('a', 'b'), ('c', 'd'), ..., ('W', 'X'), ('Y', 'Z')]

It extends readily to longer groupings:

    >>> zip(string.letters[::3], string.letters[1::3], string.letters[2::3])
    [('a', 'b', 'c'), ('d', 'e', 'f'), ('g', 'h', 'i'), ...

Obviously, if your lists are long, you can substitute itertools.izip for
zip.  There's probably some easy way to achieve the same result with
itertools.groupby, but I'm out of my experience there...

Skip


From __peter__ at web.de  Thu Jan  4 07:46:25 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 04 Jan 2007 13:46:25 +0100
Subject: Iterate through list two items at a time
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
	<12pmahqc7kclbfc@corp.supernews.com>
	<1167882211.696350.271620@s34g2000cwa.googlegroups.com>
	<1167913980.320964.264860@s34g2000cwa.googlegroups.com>
Message-ID: <eniss1$oot$00$1@news.t-online.com>

Wade Leftwich wrote:

> from itertools import groupby
> 
> def chunk(it, n=0):
>     if n == 0:
>         return iter([it])
>     def groupfun((x,y)):
>         return int(x/n)
>     grouped = groupby(enumerate(it), groupfun)
>     counted = (y for (x,y) in grouped)
>     return ((z for (y,z) in x) for x in counted)
> 
>>>> [list(x) for x in chunk(range(10), 3)]
> [[0, 1, 2], [3, 4, 5], [6, 7, 8], [9]]
> 
>>>> [x for x in chunk(range(10), 3)]
> [<generator object at 0xb7a34e4c>,
>  <generator object at 0xb7a34dac>,
>  <generator object at 0xb7a34d2c>,
>  <generator object at 0xb7a34d6c>]

Note that all but the last of these generators are useless:

>>> chunks = [x for x in chunk(range(10), 3)]
>>> [list(x) for x in chunks]
[[], [], [], [9]] # did you expect that?

Peter


From wangshuhao at sina.com  Thu Jan 25 01:48:44 2007
From: wangshuhao at sina.com (Wang Shuhao)
Date: Thu, 25 Jan 2007 14:48:44 +0800
Subject: sys.path issue in cygwin
References: <002401c73f8f$b9f7da90$14fd0179@WANGSHUHAO>
	<20070124124355.GA1308@tishler.net>
	<001801c73fc3$f8c410c0$1400a8c0@mytomato>
	<20070124152304.GA3668@tishler.net>
Message-ID: <001101c7404c$dc5468c0$14fd0179@WANGSHUHAO>

This is not a problem of Cygwin itself. The root cause of the problem is that I installed  both in Win32 version and Cygwin version on my machine. The PYTHONHOME environment variable in Windows point to c:\python24. After remove this environment variable, the Cygwin version python's sys.path become correct. Override the environment variable in Cygwing is also Ok.


----- Original Message ----- 
From: "Jason Tishler" <jason at tishler.net>
To: "Wang Shuhao" <wangshuhao at sina.com>
Cc: "Python-List" <python-list at python.org>
Sent: Wednesday, January 24, 2007 11:23 PM
Subject: Re: sys.path issue in cygwin


> Wang,
> 
> Please keep your replies on-list.
> 
> On Wed, Jan 24, 2007 at 10:28:51PM +0800, Wang Shuhao wrote:
>> > Why not use the Python that is part of the standard Cygwin
>> > distribution?
>> > 
>> Cause the Cygwin version python has the same problem, that why I try
>> to build python from source.
> 
> The above implies that you may have a Cygwin installation problem that
> may impact other Cygwin applications too.  I recommend taking this
> problem to the Cygwin list:
> 
>    http://cygwin.com/problems.html
> 
> FWIW, I get the following with the official Cygwin Python version:
> 
>    $ python -c 'import sys; print sys.path'
>    ['', '/usr/lib/python24.zip', '/usr/lib/python2.4', '/usr/lib/python2.4/plat-cygwin', '/usr/lib/python2.4/lib-tk', '/usr/lib/python2.4/lib-dynload', '/usr/lib/python2.4/site-packages']
> 
>> But finally I found the solution, the PYTHONHOME environment variable
>> controls the content of initial sys.path. Thanks anyway.
>> export PYTHONHOME=/usr/localWang Shuhao
> 
> IMO, the above is just a workaround, not a solution.
> 
> Jason
> 
> -- 
> PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
> Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6
>

From me at privacy.net  Fri Jan 12 21:40:37 2007
From: me at privacy.net (Dan Sommers)
Date: Fri, 12 Jan 2007 21:40:37 -0500
Subject: Tools Designing large/complicated applications
References: <mailman.2615.1168560567.32031.python-list@python.org>
	<45a80c9e$0$308$426a74cc@news.free.fr>
Message-ID: <m2bql3sl7e.fsf@unique.fqdn>

On Sat, 13 Jan 2007 00:00:20 +0100,
Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:

> Carl J. Van Arsdall a ?crit :

>> For those of you that work on larger applications but still code in
>> python... do your development teams use any tools to facilitate the
>> design?

> Yes : coffee, beer, pizzas, cigarettes, paper napkins, pen, and a good
> wiki.

It is a well-known fact that the best engineering tools ever invented
are the cocktail napkin and the white board.

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
"I wish people would die in alphabetical order." -- My wife, the genealogist


From metsakuri at gmail.com  Thu Jan  4 02:36:11 2007
From: metsakuri at gmail.com (tonisk)
Date: 3 Jan 2007 23:36:11 -0800
Subject: question on creating class
In-Reply-To: <1167895677.041759.230190@42g2000cwt.googlegroups.com>
References: <1167895677.041759.230190@42g2000cwt.googlegroups.com>
Message-ID: <1167896171.288729.159820@51g2000cwl.googlegroups.com>

Or if you have required class name in variable, then use:

class TestClass:
    pass

globals()[className] = TestClass

--
T?nis

On Jan 4, 9:27 am, "wcc" <wcc... at gmail.com> wrote:
> Hello,
>
> How do I create a class using a variable as the class name?
>
> For example, in the code below, I'd like replace the line
>
> class TestClass(object):
> with something like
> class eval(className) (object):
>
> Is it possible?  Thanks for your help.
>
> className = "TestClass"
>
> class TestClass(object):
>     def __init__(self):
>         print "Creating object of TestClass..."
>
>     def method1(self):
>         print "This is a method."
>
> if __name__ == "__main__":
>     o = TestClass()
>     o.method1()
> 
> --
> wcc



From nmm1 at cus.cam.ac.uk  Sun Jan 14 07:04:29 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 14 Jan 2007 12:04:29 GMT
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com><mailman.2597.1168550439.32031.python-list@python.org><eo6ia5$5bt$1@gemini.csx.cam.ac.uk><mailman.2643.1168611301.32031.python-list@python.org><eo883j$l9d$1@gemini.csx.cam.ac.uk><mailman.2648.1168616202.32031.python-list@python.org><eo8b1r$r9c$1@gemini.csx.cam.ac.uk><mailman.2664.1168630485.32031.python-list@python.org>
	<eo8oa0$o4o$1@gemini.csx.cam.ac.uk>
	<mailman.2705.1168750931.32031.python-list@python.org>
Message-ID: <eod68d$mdn$1@gemini.csx.cam.ac.uk>


In article <mailman.2705.1168750931.32031.python-list at python.org>,
"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
|> 
|> > Financial calculations need decimal FIXED-point, with a precisely
|> > specified precision.  It is claimed that decimal FLOATING-point
|> > helps with providing that, but that claim is extremely dubious.
|> > I can explain the problem in as much detail as you want, but would
|> > very much rather not.
|> 
|> Ok I will throw in a skewed ball at this point - use integer arithmetic,
|> and work in tenths of cents or pennies or whatever, and don't be too 
|> lazy to do your own print formatting...

That's not a skewed ball - that's the traditional way of doing it on
systems that don't have fixed-point hardware (and sometimes even when
they do).  Yes, it's dead easy in a language (like Python) that allows
decent encapsulation.

The decimal floating-point brigade grossly exaggerate the difficulty of
doing that, in order to persuade people that their solution is better.
If they admitted the difficulties of using decimal floating-point, and
merely said "but, overall, we think it is a better solution", I would
disagree but say nothing.


Regards,
Nick Maclaren.


From andre.roberge at gmail.com  Sun Jan 28 07:39:04 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 28 Jan 2007 04:39:04 -0800
Subject: Crunchy 0.8 release
In-Reply-To: <mailman.3242.1169977892.32031.python-list@python.org>
References: <1169932766.450129.259840@k78g2000cwa.googlegroups.com>
	<mailman.3242.1169977892.32031.python-list@python.org>
Message-ID: <1169987944.776274.33600@p10g2000cwp.googlegroups.com>


>
> I found it a little strange that the top-level directory in the
> distribution is called "andre" rather than "crunchy", but that's a very
> minor point.

Dang!  Thanks for pointing this out; I've made the proper change.  I 
had checked out from "my" development branch, as it contained the 
final changes required for the release.

Andr?

>
> regards
>   Steve



From klibertp at gmail.com  Sun Jan  7 21:30:29 2007
From: klibertp at gmail.com (klibertp at gmail.com)
Date: 7 Jan 2007 18:30:29 -0800
Subject: C++/Python programmers for a MUD's gamedriver wanted.
In-Reply-To: <459fdf8e$0$4849$4c368faf@roadrunner.com>
References: <1168102038.680286.73330@42g2000cwt.googlegroups.com>
	<459fdf8e$0$4849$4c368faf@roadrunner.com>
Message-ID: <1168223429.214744.224440@51g2000cwl.googlegroups.com>


Paul McGuire wrote:
> Have you considered whether the C++ Driver is even necessary?  Python's
> run-time engine already implements the memory and process management tasks,
> and does so in compiled C code (and has been tested and retested by
> hundreds, nay thousands, perhaps even millions of Python users).
> Interprocess communication can be done using CORBA or Pyro add-ons.
>
> You may do better by "letting Python be Python" instead of confining it to
> limited user graphical and/or text interaction, and then
> marshaling/unmarshaling commands and responses to and from the C++ layer.
> Before getting too wrapped up in the C++ core/utility layer, get this (or a
> prototype) running in pure Python first, measure the performance, and then
> reimplement in C/Pyrex/ShedSkin/C++ for the performance-intensive bits.
>
> -- Paul

The idea of writing C++ layer for Python lib seemed to be great, as far
as the only programmer involved in the project knows C++ a lot better,
than Python - we hoped to start as soon as possible, get the basic
services running in few weeks, learning Python 'by the way'. But in the
meantime we've realised, that even with much more people developing
this project it will surely last for years, so carefull consideration
of every little part of it is needed before writing even single line of
code. Extreme programming is nice, but we lack of proper skills -
instead we have a lot of time.

You're right - writing prototype with pure Python seems to be very good
idea. If we encounter any performance problems, reimplementing just a
part of code would be the best and easiest way to deal with them. Also,
using Python in the whole app will result with much cleaner code, the
integration between diferent modules will be done in more natural
manner.

We have to rethink whole app architecture, slowly and precisely. But
still, of course, everyone who wants to help is kindly welcomed :)

Sorry for my english if I made a mistake somewhere, and thank you for
your reply.

Piotr Klibert.



From mpeters42 at gmail.com  Mon Jan  8 03:57:01 2007
From: mpeters42 at gmail.com (Mark Peters)
Date: 8 Jan 2007 00:57:01 -0800
Subject: regex question
In-Reply-To: <1168246148.673027.13720@38g2000cwa.googlegroups.com>
References: <1168232001.377605.236270@11g2000cwr.googlegroups.com>
	<45a1f0c6$0$18929$4c368faf@roadrunner.com>
	<1168243020.304940.212700@42g2000cwt.googlegroups.com>
	<pan.2007.01.08.08.15.54.609742@REMOVEME.cybersource.com.au>
	<1168244922.620428.273260@38g2000cwa.googlegroups.com>
	<1168245604.911965.248360@11g2000cwr.googlegroups.com>
	<1168246148.673027.13720@38g2000cwa.googlegroups.com>
Message-ID: <1168246621.453688.53850@v33g2000cwv.googlegroups.com>

> yes, i suppose you are right.  i can't think of a reason i would NEED a
> raw string in this situation.
It looks from your code that you are trying to remove all occurances of
one string from the other.  a simple regex way would be to use re.sub()

>>> import re
>>> a = "abc"
>>> b = "debcabbde"
>>> re.sub("[" + a + "]","",b)
'dede'



From skip at pobox.com  Mon Jan 15 22:49:33 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 15 Jan 2007 21:49:33 -0600
Subject: How naive is Python?
In-Reply-To: <1168893633.362384.176620@38g2000cwa.googlegroups.com>
References: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>
	<mailman.2724.1168834095.32031.python-list@python.org>
	<1168848408.785931.285160@q2g2000cwa.googlegroups.com>
	<17835.39437.115750.617750@montanaro.dyndns.org>
	<mailman.2735.1168879589.32031.python-list@python.org>
	<1168893633.362384.176620@38g2000cwa.googlegroups.com>
Message-ID: <17836.19277.938869.961598@montanaro.dyndns.org>

>>>>> "John" == John Machin <sjmachin at lexicon.net> writes:

    John> skip at pobox.com wrote:
    John> Sorry, Skip, but I find that very hard to believe. The foo()
    John> function would take quadratic time if it were merely adding on
    John> pieces of constant size -- however len(str(i)) is not a constant,
    John> it is O(log10(i)), so the time should be super-quadratic.
    >> 
    me> Sorry, I should have pointed out that I'm using the latest version
    me> of Python.  I believe += for strings has been optimized to simply
    me> extend s when there is only a single reference to it.

    John> Sorry, I should have pointed out that you need to read up about
    John> time.time() -- what is its resolution on your box? -- and
    John> time.clock() and the timeit module.

time.time() should be plenty good enough for this particular task on my
machine (Mac OSX).  time.time() has plenty of resolution:

    >>> import time
    >>> t = time.time() ; print time.time()-t
    3.79085540771e-05
    >>> t = time.time() ; print time.time()-t
    5.00679016113e-06
    >>> t = time.time() ; print time.time()-t
    5.96046447754e-06
    >>> t = time.time() ; print time.time()-t
    5.00679016113e-06

It's time.clock() on Unix-y systems that is too coarse:

    >>> t = time.clock() ; print time.clock()-t
    0.0
    >>> t = time.clock() ; print time.clock()-t
    0.0
    >>> t = time.clock() ; print time.clock()-t
    0.0
    >>> t = time.clock() ; print time.clock()-t
    0.0
    >>> t = time.clock() ; print time.clock()-t
    0.0

I ran the size of the loop to 2**24 and still only saw linear growth in the
later versions of Python.  The machine (my Mac laptop) was otherwise idle.
I only reduced the loop length in what I posted before because of the
quadratic growth in Python 2.2 and 2.3.  It took so long to run my script
using 2.2 and 2.3 I made a slight change so that it bailed out of the larger
loops:

    #!/usr/bin/env python

    from __future__ import division

    def foo(kcount):
        s = ''
        for i in xrange(kcount) :
            s += str(i) + ' '

    import time

    for i in xrange(5,25):
        t = time.time()
        foo(2**i)
        t = time.time() - t
        print "2**%d"%i, 2**i, t, t/2**i
        if t > 200:
            break

I then ran it using this shell command:

    for v in 2.6 2.5 2.4 2.3 2.2 ; do
        echo $v
        time python$v strcopy.py
    done 2>&1 \
    | tee strcopy.out

The output is:

    2.6
    2**5 32 0.000240802764893 7.52508640289e-06
    2**6 64 0.000278949737549 4.3585896492e-06
    2**7 128 0.000599145889282 4.68082726002e-06
    2**8 256 0.00878977775574 3.43350693583e-05
    2**9 512 0.00221586227417 4.32785600424e-06
    2**10 1024 0.00433588027954 4.23425808549e-06
    2**11 2048 0.00897288322449 4.38129063696e-06
    2**12 4096 0.0197570323944 4.82349423692e-06
    2**13 8192 0.0359501838684 4.38845017925e-06
    2**14 16384 0.0721030235291 4.40081930719e-06
    2**15 32768 0.146120071411 4.45923069492e-06
    2**16 65536 0.292731046677 4.46672129328e-06
    2**17 131072 0.692205905914 5.28111195308e-06
    2**18 262144 1.20644402504 4.60221872345e-06
    2**19 524288 3.34210991859 6.37456878394e-06
    2**20 1048576 6.86596488953 6.54789437249e-06
    2**21 2097152 10.0534589291 4.79386278585e-06
    2**22 4194304 21.4015710354 5.1025321568e-06
    2**23 8388608 40.8173680305 4.86580944425e-06
    2**24 16777216 84.5512800217 5.039649011e-06

    real        2m50.195s
    user        2m26.258s
    sys 0m2.998s
    2.5
    2**5 32 0.000205039978027 6.40749931335e-06
    2**6 64 0.000274896621704 4.29525971413e-06
    2**7 128 0.000594139099121 4.64171171188e-06
    2**8 256 0.00110697746277 4.32413071394e-06
    2**9 512 0.00236988067627 4.62867319584e-06
    2**10 1024 0.0045051574707 4.39956784248e-06
    2**11 2048 0.00938105583191 4.58059366792e-06
    2**12 4096 0.0197520256042 4.82227187604e-06
    2**13 8192 0.0375790596008 4.58728754893e-06
    2**14 16384 0.0780160427094 4.76172135677e-06
    2**15 32768 0.148911952972 4.54443215858e-06
    2**16 65536 0.307368040085 4.69006408821e-06
    2**17 131072 0.703125953674 5.36442530574e-06
    2**18 262144 1.22114300728 4.6582908908e-06
    2**19 524288 2.62232589722 5.00168971485e-06
    2**20 1048576 5.06462287903 4.83000076201e-06
    2**21 2097152 10.3055510521 4.9140696774e-06
    2**22 4194304 24.6841719151 5.88516519429e-06
    2**23 8388608 42.5984380245 5.07812953288e-06
    2**24 16777216 89.6156759262 5.34151052989e-06

    real        2m58.236s
    user        2m29.354s
    sys 0m2.978s
    2.4
    2**5 32 0.000231981277466 7.24941492081e-06
    2**6 64 0.000316858291626 4.95091080666e-06
    2**7 128 0.000571966171265 4.46848571301e-06
    2**8 256 0.00112700462341 4.40236181021e-06
    2**9 512 0.00228881835938 4.47034835815e-06
    2**10 1024 0.00619387626648 6.04870729148e-06
    2**11 2048 0.00927710533142 4.52983658761e-06
    2**12 4096 0.0188140869141 4.593282938e-06
    2**13 8192 0.0386338233948 4.71604289487e-06
    2**14 16384 0.0761170387268 4.64581535198e-06
    2**15 32768 0.153247117996 4.67673089588e-06
    2**16 65536 0.306257009506 4.67311110697e-06
    2**17 131072 0.724220991135 5.52536766918e-06
    2**18 262144 1.23747801781 4.7206040108e-06
    2**19 524288 2.69648981094 5.1431461543e-06
    2**20 1048576 5.20070004463 4.9597740599e-06
    2**21 2097152 10.6776590347 5.09150459038e-06
    2**22 4194304 21.149684906 5.04247782374e-06
    2**23 8388608 46.8901240826 5.58973837883e-06
    2**24 16777216 110.079385042 6.56124264253e-06

    real        3m19.593s
    user        2m32.932s
    sys 0m3.100s
    2.3
    2**5 32 0.000223159790039 6.97374343872e-06
    2**6 64 0.000349998474121 5.46872615814e-06
    2**7 128 0.000737905502319 5.76488673687e-06
    2**8 256 0.00150609016418 5.88316470385e-06
    2**9 512 0.00307989120483 6.01541250944e-06
    2**10 1024 0.00642395019531 6.27338886261e-06
    2**11 2048 0.0161211490631 7.87165481597e-06
    2**12 4096 0.110109090805 2.68821022473e-05
    2**13 8192 0.787949800491 9.61852783803e-05
    2**14 16384 3.3133919239 0.000202233393793
    2**15 32768 14.3907749653 0.000439171599282
    2**16 65536 60.2394678593 0.000919181333302
    2**17 131072 295.17253089 0.00225198769294

    real        6m15.110s
    user        1m54.907s
    sys 3m26.747s
    2.2
    2**5 32 0.000303030014038 9.46968793869e-06
    2**6 64 0.000451803207397 7.05942511559e-06
    2**7 128 0.00087308883667 6.82100653648e-06
    2**8 256 0.00233697891235 9.12882387638e-06
    2**9 512 0.00344800949097 6.73439353704e-06
    2**10 1024 0.00730109214783 7.12997280061e-06
    2**11 2048 0.017196893692 8.39692074805e-06
    2**12 4096 0.112847805023 2.75507336482e-05
    2**13 8192 0.840929031372 0.00010265246965
    2**14 16384 3.05718898773 0.000186596007552
    2**15 32768 13.0093569756 0.000397014067858
    2**16 65536 57.9497959614 0.00088424371279
    2**17 131072 294.361263037 0.00224579821042

    real        6m9.514s
    user        1m55.257s
    sys 3m26.943s

It's clear that the behavior of the 2.4, 2.5 and 2.6 (cvs) versions is
substantially different than the 2.2 and 2.3 versions, and grows linearly as
the string length grows.  I believe any slight nonlinearity in the 2.4-2.6
versions is just due to quadratic behavior in the Mac's realloc function.

Skip


From martin at v.loewis.de  Fri Jan  5 04:22:35 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 05 Jan 2007 10:22:35 +0100
Subject: When argparse will be in the python standard installation
In-Reply-To: <64mdnTE_-5Ff3gDYnZ2dnUVZ_q6vnZ2d@comcast.com>
References: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>
	<459C008D.5040404@v.loewis.de>
	<H-ydneqpW-axgAHYnZ2dnUVZ_qWvnZ2d@comcast.com>
	<459CBAC8.9060007@v.loewis.de>
	<64mdnTE_-5Ff3gDYnZ2dnUVZ_q6vnZ2d@comcast.com>
Message-ID: <459e18db$0$17143$9b622d9e@news.freenet.de>

Steven Bethard schrieb:
> * alias ArgumentParser to OptionParser
> * alias add_argument to add_option
> * alias Values to Namespace
> * alias OptionError and OptionValueError to ArgumentError
> * alias add_help= keyword argument of ArgumentParser to add_help_option=
> * alias namespace= keyword argument of parse_args to options=

Not sure what you mean by "alias": I don't think the argparse names
should be retained (unless you feel they describe things better).
You don't need to aim for argparse compatibility: users of argparse
can continue to use the current (or future) version of argparse as
a separate module.

> * ArgumentParser.parse_args returns a single namespace object, not an
>   (options, args) tuple, since argparse handles positional arguments.
>   This could probably be addressed by adding an __iter__ method to the
>   Namespace object which would return (self, [])

I find that I'm not that familiar with command line arguments :-)

To understand that difference, I would have to see examples of both,
and why it is better to return a single result.

In any case, if the argparse interface is more powerful, and the
old interface cannot be emulated transparently, a new interface could
be added, with the old one deprecated and phased out (preferably with
some conversion guideline). It would be possible to drop the old one
in Py3k, I guess.

> * argparse uses standard string formatting specifiers, e.g. %(default)s
>   and %(prog)s instead of optparse's %default and %prog. It could
>   probably be hacked to support both though.

That would be good.

> * argparse makes the default value for a "store_true" action False, and
>   the default value for a "store_false" action True. This is what users
>   expect, but different from optparse where the default is always None.

Could we deprecate "store_false" with no default? It may be that users
expect to see True and False, but how can you find out whether the
option was given or not afterwards?

Alternatively, could the actions become keyword arguments (with the
action argument only preserved for backwards compatibility)? E.g.

parser.add_option("-v", store_true_into="verbose")
parser.add_option("-q", store_false_into="verbose")
(same for store, append, count, callback)

> * the choices argument is now checked *after* arguments have been
>   type-converted. This is intentional, so that you can specify, say
>   xrange(100) instead of ["0", "1", "2", "3", ... "99"]. There is also
>   no "choices" type anymore since any action can also specify their
>   choices.

As an incompatible change, this could be warned-about if the type is not
string, yet the first choice is.

Alternatively, we could require users that pass converted values to
specify converted_choices=True in 2.6, and warn all users that don't
pass a converted_choices flag, and then flip the default in 2.7 and 3.0.
Then current users had a quick fix to silence the warning, and new
users could drop the extra flag in the future.

>   I could probably add callback actions by creating an appropriate
>   Action subclass and registering it. However, any code relying on
>   parser.{largs,rargs,values} would break because the parsing algorithm
>   is completely different in argparse.

If you can find a way to make callbacks work in the "common case",
this flag could be deprecated and removed.

> I guess I don't know how to proceed from here. I'm reluctant to start
> adding the code necessary to support even the easily solved issues when
> the issues that I don't know how to solve seem like they could be deal
> breakers.

This asks for a PEP. The views above are mine only, others may feel
differently.

Regards,
Martin


From dwaizer at noreply.com  Thu Jan 18 12:57:56 2007
From: dwaizer at noreply.com (David Waizer)
Date: Thu, 18 Jan 2007 12:57:56 -0500
Subject: spidering script
Message-ID: <8N6dnSE2eO6QKDLYnZ2dnUVZ_uejnZ2d@fdn.com>

Hello..

I'm  looking for a script (perl, python, sh...)or program (such as wget) 
that will help me get a list of ALL the links on a website.

For example ./magicscript.pl www.yahoo.com and outputs it to a file, it 
would be kind of like a spidering software..

Any suggestions would be appreciated.

David 




From could.net at gmail.com  Sun Jan 21 11:52:06 2007
From: could.net at gmail.com (Frank Potter)
Date: 21 Jan 2007 08:52:06 -0800
Subject: Is any python like linux shell?
Message-ID: <1169398326.510530.180860@51g2000cwl.googlegroups.com>

I learned some python in windows.
And now I've turned to linux.
I read a book and it teaches how to write shell script with bash,
but I don't feel like the grammar of bash.
Since I know about python,
I want to get a linux shell which use python grammar.
I searched by google and I found pysh, which is not maintained any
more.
There's another script named pyshell, which is not likely what I'm
searching for.
So, will somebody please tell me if there are any python like shells
for linux?



From smusnmrNOSPAM at yahoo.com  Mon Jan 15 03:55:06 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Mon, 15 Jan 2007 09:55:06 +0100
Subject: python and MOV or MPEG
Message-ID: <eoffha$epe2$1@zam602.zam.kfa-juelich.de>

Hi all,

does Python support MPEG or MOV videoclips? I couldn't find anything about
it online.

Thank you,

Siggi






From egooli at gmail.com  Sun Jan 28 04:31:48 2007
From: egooli at gmail.com (gooli)
Date: 28 Jan 2007 01:31:48 -0800
Subject: Locking access to all data members
Message-ID: <1169976708.934441.213770@h3g2000cwc.googlegroups.com>

I have a class with a lot of attributes whose objects are accessed 
from multiple threads. I would like to synchronize the access to all 
the attributes, i.e. acquire a lock, return the value, release the 
lock (in a finally clause).

Is there a way to do that without turning each attribute into a 
property and manually wrapping each property with the locking code?

How about classes bound with SQLAlchemy? Is it possible to do that for 
those too?

Example of a class I would like to wrap:

class Job(object):
    def __init__(self, itemType):
        self.id = self.idSequence
        self.itemType = itemType
        self.status = "waiting"
        self.createDate = None
        self.hostName = None
        self.progress = 0
        self.items = []



From steve at REMOVE.THIS.cybersource.com.au  Tue Jan 23 17:17:26 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 24 Jan 2007 09:17:26 +1100
Subject: Overloading assignment operator
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
	<ep5kt4$sun$01$1@news.t-online.com>
Message-ID: <pan.2007.01.23.22.17.26.616891@REMOVE.THIS.cybersource.com.au>

On Tue, 23 Jan 2007 19:42:01 +0100, Peter Otten wrote:

> Achim Domma wrote:
> 
>> I want to use Python to script some formulas in my application. The user
>> should be able to write something like
>> 
>> A = B * C
>> 
>> where A,B,C are instances of some wrapper classes. Overloading * is no
>> problem but I cannot overload the assignment of A. I understand that
>> this is due to the nature of Python, but is there a trick to work around
>> this?
> 
>>>> class D(dict):
> ...     def __setitem__(self, key, value):
> ...             print key, "<--", value
> ...             dict.__setitem__(self, key, value)
> ...
>>>> namespace = D(B=42, C=24)
>>>> exec "A = B * C" in namespace
> A <-- 1008

Very clever, except:

(1) The Original Poster's requirement was for a "clean syntax" and 
'exec "A = B * C" in namespace' is anything but a clean syntax.

(2) The O.P. specifies that the syntax is for use by his users. We don't
know who these users are, but can you see users getting this right and not
ignoring the namespace argument?

(3) Even if they do use the namespace argument, how hard is it for the
users to break the security of your exec?

>>> exec "A = B * C;import os;os.system('ls -l break-something')" in namespace
A <-- 1008
os <-- <module 'os' from '/usr/lib/python2.4/os.pyc'>
-rw-rw-r-- 1 steve steve 0 Jan 24 08:27 break-something

Using exec on user-supplied data is just begging to be p0wned.


-- 
Steven.



From robert.kern at gmail.com  Mon Jan 29 16:13:25 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 29 Jan 2007 15:13:25 -0600
Subject: python 2.3 module ref
In-Reply-To: <6178735.qJi6sMvOM0@teancum>
References: <6178735.qJi6sMvOM0@teancum>
Message-ID: <eplo1n$ts0$1@sea.gmane.org>

David Bear wrote:
> Since redhat packages python2.3 with their distro (RHEL 4..) I was looking
> for a module reference for that version. Looking at python.org I only see
> current documentation.
> 
> any pointers to a 2.3 module ref?

  http://docs.python.org/

Click on "Locate previous versions."

  http://www.python.org/doc/versions/

Click on "2.3.5" (or whichever microrelease your desire).

  http://www.python.org/doc/2.3.5/

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From gagsl-py at yahoo.com.ar  Mon Jan  8 14:19:04 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 08 Jan 2007 16:19:04 -0300
Subject: More Efficient fnmatch.fnmatch for multiple patterns?
In-Reply-To: <slrneq54lr.4ao.wojciech_mula@cat.tac>
References: <1168279822.921033.267210@v33g2000cwv.googlegroups.com>
	<slrneq54lr.4ao.wojciech_mula@cat.tac>
Message-ID: <7.0.1.0.0.20070108161513.05c2d808@yahoo.com.ar>

At Monday 8/1/2007 15:55, Wojciech =?ISO-8859-2?Q?Mu=B3a?= wrote:

>pats = re.compile('|'.join(fnmatch.translate(p) for p in patterns))

Hmm, fnmatch.translate does not appear in the docs.
But it does on the module docstring, and in __all__, so certainly 
it's supposed to be public.
I'll file a bug report.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From austuff at gmail.com  Thu Jan 25 01:05:49 2007
From: austuff at gmail.com (aus stuff)
Date: Thu, 25 Jan 2007 15:35:49 +0930
Subject: ftplib and retrbinary or retrlines (losing newline characters in my
	log files)
Message-ID: <7d1760310701242205u6e6b4706ja20e3c07406a8064@mail.gmail.com>

Hi am successfully downloading my text files and writing them to local files
 with either

ftp.retrlines('RETR ' + fl, fileObj.write)"

ftp.retrbinary('RETR <ftp://ftp.retrbinary('retr/> ' + fl, fileObj.write)

However all my recieved (log) files have lost thier newline characters?

Can anyone steer me in the right direction so my 'recieved log' files arent
all jumbled into one line?

(full code below)
any help appreciated :)
(excuse my newbie code copying )

Special thanks to the person/s whom originally made this code (found on
google)


<<<<<<<<<code starts


import string
import os
from sets import Set
from ftplib import FTP
import time

def
copyFTPFiles(serverName,userName,passWord,remotePath,localPath,deleteRemoteFiles=False,onlyDiff=False):
    """Connect to an FTP server and bring down files to a local directory"""

    try:
        ftp = FTP(serverName)
    except:
        print "Couldn't find server"
        #print >>myLogger, "Couldn't find server"
    ftp.login(userName,passWord <ftp://ftp.login(username,password/>)
    ftp.cwd(remotePath <ftp://ftp.cwd(remotepath/>)

    try:

        #print >>myLogger, "Connecting...",
        print "Connecting..."
        if onlyDiff:
            lFileSet = Set(os.listdir(localPath))
            rFileSet = Set(ftp.nlst())
            transferList = list(rFileSet - lFileSet)
            #print >>myLogger,  "Missing: " + str(len(transferList)) + ' >>>
',
            print "Missing: " + str(len(transferList)),
        else:
            transferList = ftp.nlst()
        delMsg = ""
        filesMoved = 0
        for fl in transferList:
            ttt = ''
            ttt = str(fl)
            if string.find(ttt, '.') > 0 :
                print '\nCopying >>> ' + ttt

                # create a full local filepath
                localFile = localPath + fl
                grabFile = True
                if grabFile:
                    #open a the local file
                    fileObj = open(localFile, 'wb')
                    # Download the file a chunk at a time using RETR
                    #ftp.retrbinary('RETR ' + fl, fileObj.write)
                    ftp.retrlines('RETR <ftp://ftp.retrlines('retr/> ' + fl,
fileObj.write)


                    # Close the file
                    fileObj.close()
                    filesMoved += 1

                # Delete the remote file if requested

                if deleteRemoteFiles:
                    ftp.delete(fl)
                    delMsg = " and Deleted"
                    #print >>myLogger,  " and Deleted"

        #print >>myLogger,  "Files Moved" + delMsg + ": " + str(filesMoved)
+ ' >>> ' + " On " + timeStamp()
        print "\nFiles Copied " + delMsg + ": " + str(filesMoved)
    except:
        #print >>myLogger,  "Connection Error - " + timeStamp()
        print "Connection Error - "
    ftp.close() # Close FTP connection
    ftp = None

copyFTPFiles("server","uname","pass","remoteDir","localDir")



>>>>>>>code end
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070125/1f3826f6/attachment.html>

From gagsl-py at yahoo.com.ar  Thu Jan 25 20:33:33 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 25 Jan 2007 22:33:33 -0300
Subject: difflib qualm
In-Reply-To: <4-CdnZBrjaO4zSTYnZ2dnUVZ_v6tnZ2d@comcast.com>
References: <2adc542f0701241805i79b79580y2522ec854e49621d@mail.gmail.com>
	<mailman.3132.1169691995.32031.python-list@python.org>
	<4-CdnZBrjaO4zSTYnZ2dnUVZ_v6tnZ2d@comcast.com>
Message-ID: <7.0.1.0.0.20070125222947.047c3388@yahoo.com.ar>

At Thursday 25/1/2007 21:49, Larry Bates wrote:
>Gabriel Genellina wrote:
> > At Wednesday 24/1/2007 23:05, Sick Monkey wrote:
> >
> >> I am trying to write a python script that will compare 2 files which
> >> contains names (millions of them).
> >>
> >> More specifically, I have 2 files (Files1.txt and Files2.txt).
> >> Files1.txt contains 180 thousand names and Files2.txt contains 34
> >> million names.
>
>Put the big list of names in a database and create soundex keys for the names
>and make the soundex keys an index so you can search quickly.  Databases
>are really good at storing data that is searchable via an index.  If 
>you REALLY
>need speed you can consider an in-memory database.
>
>Create soundex keys for each name in your small list and query the database
>with this key into the table in the DB that is indexed on soundex keys.
>If you get a hit, the key is sufficiently "alike" to be a candidate.  I'll
>leave the remainder to you.  Perhaps there is other information that will
>help determine if there is a match?

Soundex is only good for English words, and it's almost useless for 
non-English names, so it must be used with caution if used at all.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From sjmachin at lexicon.net  Mon Jan 15 15:40:35 2007
From: sjmachin at lexicon.net (John Machin)
Date: 15 Jan 2007 12:40:35 -0800
Subject: How naive is Python?
In-Reply-To: <mailman.2735.1168879589.32031.python-list@python.org>
References: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>
	<mailman.2724.1168834095.32031.python-list@python.org>
	<1168848408.785931.285160@q2g2000cwa.googlegroups.com>
	<17835.39437.115750.617750@montanaro.dyndns.org>
	<mailman.2735.1168879589.32031.python-list@python.org>
Message-ID: <1168893633.362384.176620@38g2000cwa.googlegroups.com>


skip at pobox.com wrote:
> John> Sorry, Skip, but I find that very hard to believe. The foo()
>     John> function would take quadratic time if it were merely adding on
>     John> pieces of constant size -- however len(str(i)) is not a constant,
>     John> it is O(log10(i)), so the time should be super-quadratic.
>
>     me> Sorry, I should have pointed out that I'm using the latest version
>     me> of Python.  I believe += for strings has been optimized to simply
>     me> extend s when there is only a single reference to it.

Sorry, I should have pointed out that you need to read up about
time.time() -- what is its resolution on your box? -- and time.clock()
and the timeit module.

>
> Actually, it isn't until I work my way back to 2.3 that I start to see
> quadratic behavior:
>
>     % python2.6 strcopy.py
>     32 0.00022292137146 6.96629285812e-06
>     64 0.000907897949219 1.41859054565e-05
>     128 0.000649929046631 5.0775706768e-06
>     256 0.00111794471741 4.36697155237e-06
>     512 0.00260806083679 5.09386882186e-06
>     1024 0.00437998771667 4.27733175457e-06
>     2048 0.00921607017517 4.50003426522e-06
>     4096 0.0191979408264 4.68699727207e-06
>     8192 0.0694131851196 8.47328919917e-06
>     16384 0.0976829528809 5.96209429204e-06
>     32768 0.194766998291 5.94381708652e-06
>     % python2.5 strcopy.py
>     32 0.000439167022705 1.37239694595e-05
>     64 0.000303030014038 4.73484396935e-06
>     128 0.000631809234619 4.93600964546e-06
>     256 0.00112318992615 4.38746064901e-06
>     512 0.00279307365417 5.45522198081e-06
>     1024 0.00446391105652 4.35928814113e-06
>     2048 0.00953102111816 4.65381890535e-06
>     4096 0.0198018550873 4.83443727717e-06
>     8192 0.175454854965 2.14178289752e-05
>     16384 0.103327989578 6.30663998891e-06
>     32768 0.191411972046 5.84142981097e-06
[snip]

Your ability to "see" quadratic behavoiur appears to be impaired by (1)
the low resolution and/or erratic nature of time.time() on your system
(2) stopping the experiment just before the results become interesting.

Try this with the latest *production* release (2.5):

C:\junk>cat fookount.py
def foo(kcount):
    s = ''
    for i in xrange(kcount) :
        s += str(i) + ' '

C:\junk>for /L %n in (10,1,19) do \python25\python -mtimeit -s"from
fookount import foo" "foo(2**%n)"

C:\junk>\python25\python -mtimeit -s"from fookount import foo"
"foo(2**10)"
100 loops, best of 3: 1.1 msec per loop

C:\junk>\python25\python -mtimeit -s"from fookount import foo"
"foo(2**11)"
100 loops, best of 3: 2.34 msec per loop

C:\junk>\python25\python -mtimeit -s"from fookount import foo"
"foo(2**12)"
100 loops, best of 3: 4.79 msec per loop

C:\junk>\python25\python -mtimeit -s"from fookount import foo"
"foo(2**13)"
10 loops, best of 3: 9.57 msec per loop

C:\junk>\python25\python -mtimeit -s"from fookount import foo"
"foo(2**14)"
10 loops, best of 3: 19.8 msec per loop

C:\junk>\python25\python -mtimeit -s"from fookount import foo"
"foo(2**15)"
10 loops, best of 3: 40.7 msec per loop

C:\junk>\python25\python -mtimeit -s"from fookount import foo"
"foo(2**16)"
10 loops, best of 3: 82.1 msec per loop

C:\junk>\python25\python -mtimeit -s"from fookount import foo"
"foo(2**17)"
10 loops, best of 3: 242 msec per loop

C:\junk>\python25\python -mtimeit -s"from fookount import foo"
"foo(2**18)"
10 loops, best of 3: 886 msec per loop

C:\junk>\python25\python -mtimeit -s"from fookount import foo"
"foo(2**19)"
10 loops, best of 3: 3.21 sec per loop

Cheers,
John



From gagsl-py at yahoo.com.ar  Mon Jan 15 20:38:49 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 15 Jan 2007 22:38:49 -0300
Subject: for v in l:
In-Reply-To: <ef60af090701151648p4e897233w7ca98afbc6b9184@mail.gmail.com
 >
References: <ef60af090701151648p4e897233w7ca98afbc6b9184@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070115223439.05c87058@yahoo.com.ar>

At Monday 15/1/2007 21:48, Gert Cuykens wrote:

>is there a other way then this to loop trough a list and change the values
>
>         i=-1
>         for v in l:
>                 i=i+1
>                 l[i]=v+x

for i,value in enumerate(my_list):
     my_list[i] = compute_new_value(value)

See the tutorial 
http://docs.python.org/tut/node7.html#SECTION007600000000000000000 
for more info about loops.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From anil.pundoor at gmail.com  Thu Jan 11 07:51:34 2007
From: anil.pundoor at gmail.com (anil.pundoor at gmail.com)
Date: 11 Jan 2007 04:51:34 -0800
Subject: Reloading the already imported module
Message-ID: <1168519894.160024.70930@o58g2000hsb.googlegroups.com>

hi all,
      i have following code


                if <condition>
                        from SIPT.xml_param_mapping import
MESSAGE_PARAMETER_MAPPING
                else:
                        from SIPT.msg_param_mapping import
MESSAGE_PARAMETER_MAPPING


                        parameter_list = MESSAGE_PARAMETER_MAPPING [
'ABC' ]
                        for parms in parameter_list:

parameter_list[parms][4] = 'EXPORT'

parameter_list[parms][5] = 'IMPORT'


       After this the xml_param_mapping gets altered. this process is
repeated over couple of time. But every time i need to get a fresh
xml_param_mapping. So how to relaod the already imported module??



regards
Anil



From lrahuel.notgood at voila.fr  Wed Jan 24 04:46:52 2007
From: lrahuel.notgood at voila.fr (Laurent Rahuel)
Date: Wed, 24 Jan 2007 10:46:52 +0100
Subject: My python programs need a GUI, wxPython or PyQt4?
References: <ep60jp$63v$1@aioe.org>
Message-ID: <45b72b0d$0$5107$ba4acef3@news.orange.fr>

Hi,

I known this can be impossible but what about an "HTML" GUI ?

Daniel Jonsson wrote:

> So, I've reached the point where my building pipeline tools actually
> needs to be used by other people in my company. By this reason I
> actually need to think about the usability, and I've come to the
> conclusion that I need a GUI. So, which of the two packages should I
> learn, and which one is easier to pick up?
> Thanks in advance!
> 
> Daniel



From gagsl-py at yahoo.com.ar  Wed Jan 17 18:23:10 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 17 Jan 2007 20:23:10 -0300
Subject: Anyone has a nice "view_var" procedure ?
In-Reply-To: <5d831$45aea748$d443bb3a$26464@news.speedlinq.nl>
References: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
	<1168904865.253014.210140@m58g2000cwm.googlegroups.com>
	<8ab5f$45ad5c12$d443bb3a$7243@news.speedlinq.nl>
	<mailman.2823.1169032836.32031.python-list@python.org>
	<5d831$45aea748$d443bb3a$26464@news.speedlinq.nl>
Message-ID: <7.0.1.0.0.20070117201541.04226b60@yahoo.com.ar>

At Wednesday 17/1/2007 19:46, Stef Mientki wrote:

> >      for key,value in count:
> >         line += ' %s=%d' % (key, value)
> >
>I didn't succeed to use value as a enumerator, and I had to typecast 
>key into a string (and skipping
>some redundant information, but then it works great, thanks !!

Ouch, my fault! I didn't test it when I wrote it :(

>here the complete listing:
>      count = {}
>      for item in V:
>        t = type(item)
>        try: count[t] += 1
>        except KeyError: count[t] = 1
>      if type(V)==list: line = 'list:'
>      else: line = 'tuple:'
>      for key in count: line += '  %s=%d' %('N_'+str(key)[7:-2],count[key])
>      print line

str(key)[7:-2] => key.__name__

Nice to see you built a useful tool! It's a great way to learn a language.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From gagsl-py at yahoo.com.ar  Mon Jan  8 19:13:52 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 08 Jan 2007 21:13:52 -0300
Subject: Maths error
In-Reply-To: <50fudtF1g1nplU1@mid.individual.net>
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
Message-ID: <7.0.1.0.0.20070108211131.0398ec20@yahoo.com.ar>

At Monday 8/1/2007 19:20, Bjoern Schliessmann wrote:

>Rory Campbell-Lange wrote:
>
> > Is using the decimal module the best way around this? (I'm
> > expecting the first sum to match the second). It seem
> > anachronistic that decimal takes strings as input, though.
>[...]
>Also check the recent thread "bizarre floating point output".

And the last section on the Python Tutorial "Floating Point 
Arithmetic: Issues and Limitations"


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From suregay at google.com  Sun Jan 21 03:47:53 2007
From: suregay at google.com (Eds Daughter)
Date: Sun, 21 Jan 2007 08:47:53 GMT
Subject: ***** See my Cam *****
Message-ID: <ZMFsh.733809$1T2.611171@pd7urf2no>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070121/bb28c132/attachment.html>

From __peter__ at web.de  Tue Jan  2 07:38:36 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 02 Jan 2007 13:38:36 +0100
Subject: mutable numeric type
References: <mailman.2193.1167708425.32031.python-list@python.org>
Message-ID: <endjle$uqn$00$1@news.t-online.com>

Andreas Beyer wrote:

> There has been quite some traffic about mutable and immutable data types
> on this list. I understand the issues related to mutable numeric data
> types. However, in my special case I don't see a better solution to the
> problem.
> Here is what I am doing:
> 
> I am using a third party library that is performing basic numerical
> operations (adding, multiplying, etc.) with objects of unknown type. Of
> course, the objects must support the numerical operators. In my case the
> third party library is a graph algorithm library and the assigned
> objects are edge weights. I am using the library to compute node
> distances, etc.
> 
> I would like to be able to change the edge weights after creating the
> edges. Otherwise, I would have to remove the edges and re-create them
> with the new values, which is quite costly. Since I also didn't want to
> change the code of the graph library, I came up with a mutable numeric
> type, which implements all the numerical operators (instances are of
> course not hashable). This allows me to change the edge weights after
> creating the graph.
> 
> I can do the following:
>  >>> x = MutableNumeric(10)
>  >>> y = MutableNumeric(2)
>  >>> x*y
> 20
>  >>> x.value = 1.3
>  >>> x*y
> 2.6000000000000001
>  >>>
> 
> The effect of numerical operations is determined by the contained basic
> data types:
>  >>> x.value = 3
>  >>> x/2
> 1
>  >>> x.value = 3.0
>  >>> x/2
> 1.5
>  >>>
> 
> Augmented operations change the instance itself:
>  >>> x.value = 0
>  >>> id(x)
> -1213448500
>  >>> x += 2
>  >>> x
> MutableNumeric(2)
>  >>> id(x) # show that same instance
> -1213448500
>  >>>
> 
> Is there anything wrong with such design? 

The library you are planning to feed with your mutable numbers has to be
designed with such somewhat unusual beasts in mind. For instance, it can no
longer cache intermediate values as their constituents may have changed
without notification.
Don't use that design unless the library's designers explicitly allow it or
at least after extensive testing. Be aware that in the latter case every
new version of the library may break your app beyond fixability.

> I am a bit surprised that 
> Python does not already come with such data type (which is really simple
> to implement). 

I'm guessing: Such a type is not normally useful -- and if you need it it is
really simple to implement :-)

Peter





From wojciech_mula at poczta.null.onet.pl.invalid  Fri Jan  5 08:06:23 2007
From: wojciech_mula at poczta.null.onet.pl.invalid (Wojciech =?ISO-8859-2?Q?Mu=B3a?=)
Date: Fri, 5 Jan 2007 13:06:23 +0000 (UTC)
Subject: Change coords of a canvas.line item
References: <enlfps$aka$1@anderson.hrz.tu-chemnitz.de>
	<mailman.2322.1168000506.32031.python-list@python.org>
Message-ID: <slrnepsj3s.3nb.wojciech_mula@cat.tac>

Fredrik Lundh wrote:
> Matthias Vodel wrote:
>
>> I want to change the beginning/end-coordinates of a canvas.line item.
>>
>> Something like:
>>
>> self.myCanvas.itemconfigure(item_id, coords=(x1_new, y1_new, x2_new, y2_new))
>
>     self.myCanvas.coords(item_id, x1_new, y1_new, x2_new, y2_new)

You can also use insert and dchars methods to add and delete
vertices (useful for polylines/polygons).

w.


From pydecker at gmail.com  Tue Jan 16 10:36:33 2007
From: pydecker at gmail.com (Peter Decker)
Date: Tue, 16 Jan 2007 10:36:33 -0500
Subject: Projects anyone?
In-Reply-To: <1168949268.618793.102890@l53g2000cwa.googlegroups.com>
References: <1168949268.618793.102890@l53g2000cwa.googlegroups.com>
Message-ID: <ca55a9900701160736g4887053sa1d4b7844951ca13@mail.gmail.com>

On 16 Jan 2007 04:07:50 -0800, placid <Bulkan at gmail.com> wrote:
> Hi all,
>
> I'm looking for anyone who is working on a project at the moment that
> needs help (volunteer). The last project i worked on personally was
> screen-scraping MySpace profiles (read more at the following link)
>
> http://placid.programming.projects.googlepages.com/screen-scrapingmyspaceprofiles
>
>
> but that didn't go all to well, so im kinda bored and need something to
> do, with Python. So any suggestions anyone?

I know the Dabo folks (http://dabodev.com) are always looking for
help, although that is not a simple one-trick project, so it might not
be what you're looking for.

-- 

# p.d.


From nagle at animats.com  Fri Jan 19 13:16:14 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 19 Jan 2007 10:16:14 -0800
Subject: More M2Crypto issues
In-Reply-To: <mailman.2887.1169173756.32031.python-list@python.org>
References: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>
	<mailman.2887.1169173756.32031.python-list@python.org>
Message-ID: <6u7sh.264$4H1.150@newssvr17.news.prodigy.net>

Gabriel Genellina wrote:
> At Thursday 18/1/2007 04:41, John Nagle wrote:

> On a previous version of M2Crypto that line said: map()[self.ctx] = 
> self, and that failed too ("unhashable object", I think).
> I changed the class _ctxmap (the map() above returns an instance of it) 
> to use str(key) in the 3 places it was used. (That would be equivalent 
> to use str(self.ctx) everywhere, instead of long(self.ctx) as your 
> traceback is showing). All I can say is that no error happened 
> afterwards, but I don't know if that broke something. 
> 
> 
> So using str() appears, at least on the surface, to be reasonable. But 
> someone with more intimate knowledge of the library should confirm that. 
> I don't even understand what's the point for the _ctxmap singleton - 
> it's the same thing as a global dictionary, isn't it?

     I played around with using "str" too, but I was worried about
Python and SWIG version issues.  I'm not sure you can use "str"
on those objects on all versions and platforms.  I think that
SWIG is generating the implementations of __str__ and __long__.

     Incidentally, note in that area that if you never explicitly
call "close" on a Context, it will never be released.  Or so
it looks from the code.

     Actually, at the moment I'm having an M2Crypto problem related
to a SWIG/OpenSSL conflict.  Older versions of OpenSSL have an
include file that needs __i386__ defined, which is something GCC
does based on what platform you're on.  SWIG uses CPP, but
doesn't set the platform defines, so the SWIG phase of the
M2Crypto build fails.  I'm currently trying to get the shared
host where that build took place upgraded to a later version of
OpenSSL, but that requires a server restart, so it may take
a few days.  I'm doing something that requires M2Crypto to
run on a range of machines, which turns out to be rather harder
than expected.

     All this stuff is in the area that Guido was unhappy about
in his "M2Crypto Woes" article.

     http://www.artima.com/weblogs/viewpost.jsp?thread=95863

The worst problems there have been fixed, but we're not out
of the woods yet.  As Guido wrote, using SWIG does complicate
things.

     I'm currently getting good results on Windows 2000 with
Python 2.4 using M2Crypto 0.17; right now, the problems are
on the Linux side.

				John Nagle


From draghuram at gmail.com  Tue Jan 23 12:26:47 2007
From: draghuram at gmail.com (draghuram at gmail.com)
Date: 23 Jan 2007 09:26:47 -0800
Subject: Reading character from keyboard
References: <mailman.3032.1169571299.32031.python-list@python.org>
Message-ID: <1169573207.270724.316560@d71g2000cwa.googlegroups.com>


Tommy Grav wrote:
> A very simple question. I would like to read a single character from the
> keyboard (y or n). I have tried to look in my Python books and a google
> search, but have come up empty. I am sure the info s out there, but I
> guess I am unable to find the right question or search keyword :o/

You can use "raw_input".

http://docs.python.org/lib/built-in-funcs.html

If you are looking for a function to ask the user for confirmation, you
can use something like this:

-----------------------------------
def confirm(_prompt=None, _default=False):
    """prompts for yes or no response. Return True for yes and False
for no."""
    promptstr = _prompt
    if (not promptstr):
        promptstr = "Confirm"

    if (_default):
        prompt = "%s [%s]|%s: " % (promptstr, "y", "n")
    else:
        prompt = "%s [%s]|%s: " % (promptstr, "n", "y")

    while (True):
        ans = raw_input(prompt)
        if (not ans):
            return _default
        if ((ans != "y") and (ans != "Y") and (ans != "n") and (ans !=
"N")):
            print "please enter again y or n."
            continue
        if ((ans == "y") or (ans == "Y")):
            return True
        if ((ans == "n") or (ans == "N")):
            return False
--------------------------------------------

Usage:

if  (confirm("\nWant to proceed?", _default=False)):
    # proceed

------------------------------------------------



From andrea.massa at gmail.com  Tue Jan  9 04:39:08 2007
From: andrea.massa at gmail.com (Nuke)
Date: 9 Jan 2007 01:39:08 -0800
Subject: formattazione cifra con decimali
Message-ID: <1168335548.504284.287150@q40g2000cwq.googlegroups.com>

Ho cercato un poco sulla documentazione di python senza trovare una
risposta soddisfacente al mio problema, quindi spero di trovare un
aiuto qui.
Ho creato un programmino che mi fa alcuni calcoli e riepiloghi
personali e vorrei visualizzare i totali numerici in euro con la
formattazione comprensiva dei separatori decimali.

Per esempio ho un totale scritto attualmente cos?:   50320,12  e
vorrei che si visualizzasse cosi: 50.320,12

esiste gi? una qualche funzione che mi formatta il numero (o la
stringa eventualmente) in questo modo?

Grazie a chi sapr? darmi una risposta in merito.



From NikitaTheSpider at gmail.com  Fri Jan 26 13:59:46 2007
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Fri, 26 Jan 2007 13:59:46 -0500
Subject: Help extracting info from HTML source ..
References: <mailman.3182.1169776623.32031.python-list@python.org>
	<1169819118.201093.267320@h3g2000cwc.googlegroups.com>
Message-ID: <NikitaTheSpider-44C050.13594526012007@news-server.nc.rr.com>

In article <1169819118.201093.267320 at h3g2000cwc.googlegroups.com>,
 "Miki" <miki.tebeka at gmail.com> wrote:

> Hello Shelton,
> 
> >   I am learning Python, and have never worked with HTML.  However, I would
> > like to write a simple script to audit my 100+ Netware servers via their web
> > portal.
> Always use the right tool, BeautilfulSoup
> (http://www.crummy.com/software/BeautifulSoup/) is best for web
> scraping (IMO).
> 
> from urllib import urlopen
> from BeautifulSoup import BeautifulSoup
> 
> html = urlopen("http://www.python.org").read()
> soup = BeautifulSoup(html)
> for link in soup("a"):
> 	print link["href"], "-->", link.contents

Agreed. HTML scraping is really complicated once you get into it. It 
might be interesting to write such a library just for your own 
satisfaction, but if you want to get something done then use a module 
that already written, like BeautifulSoup. Another module that will do 
the same job but works differently (and more simply, IMO) is HTMLData by 
Connelly Barnes:
http://oregonstate.edu/~barnesc/htmldata/

-- 
Philip
http://NikitaTheSpider.com/
Whole-site HTML validation, link checking and more


From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 13 14:08:03 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 14 Jan 2007 06:08:03 +1100
Subject: Boilerplate in rich comparison methods
References: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>
	<1168674664.792869.213260@m58g2000cwm.googlegroups.com>
	<45a90301$0$7677$4c368faf@roadrunner.com>
Message-ID: <pan.2007.01.13.19.08.03.19901@REMOVE.THIS.cybersource.com.au>

On Sat, 13 Jan 2007 10:04:17 -0600, Paul McGuire wrote:

> Just a side note on writing these comparison operators.  I remember when 
> learning Java that this was really the first time I spent so much time 
> reading about testing-for-identity vs. testing-for-equality.  The Java 
> conventional practice at the time was to begin each test-for-equality method 
> by testing to see if an object were being compared against itself, and if 
> so, cut to the chase and return True (and the converse for an inequality 
> comparison).  The idea behind this was that there were ostensibly many times 
> in code where an object was being compared against itself (not so much in an 
> explicit "if x==x" but in implicit tests such as list searching and 
> filtering), and this upfront test-for-identity, being very fast, could 
> short-circuit an otherwise needless comparison.
> 
> In Python, this would look like:
> 
> class Parrot:
>     def __eq__(self, other):
>         return self is other or self.plumage() == other.plumage()

[snip]

Surely this is only worth doing if the comparison is expensive?
Testing beats intuition, so let's find out...

class Compare:
    def __init__(self, x):
        self.x = x
    def __eq__(self, other):
        return self.x == other.x

class CompareWithIdentity:
    def __init__(self, x):
        self.x = x
    def __eq__(self, other):
        return self is other or self.x == other.x

Here's the timing results without the identity test:

>>> import timeit
>>> x = Compare(1); y = Compare(1)
>>> timeit.Timer("x = x", "from __main__ import x,y").repeat()
[0.20771503448486328, 0.16396403312683105, 0.16507196426391602]
>>> timeit.Timer("x = y", "from __main__ import x,y").repeat()
[0.20918107032775879, 0.16187810897827148, 0.16351795196533203]

And with the identity test:

>>> x = CompareWithIdentity(1); y = CompareWithIdentity(1)
>>> timeit.Timer("x = x", "from __main__ import x,y").repeat()
[0.20761799812316895, 0.16907095909118652, 0.16420602798461914]
>>> timeit.Timer("x = y", "from __main__ import x,y").repeat()
[0.2090909481048584, 0.1968839168548584, 0.16479206085205078]

Anyone want to argue that this is a worthwhile optimization? :)

> On the other hand, I haven't seen this idiom in any Python code that I've 
> read, and I wonder if this was just a coding fad of the time.
>
> Still, in cases such as Steven's Aardark class, it might be worth
> bypassing something that calls lots_of_work if you tested first to see
> if self is not other.

The comparison itself would have to be quite expensive to make it worth
the extra code.


-- 
Steven.



From roy at panix.com  Sun Jan 14 23:12:08 2007
From: roy at panix.com (Roy Smith)
Date: Sun, 14 Jan 2007 23:12:08 -0500
Subject: How naive is Python?
References: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>
Message-ID: <roy-D7383B.23120814012007@032-325-625.area1.spcsdns.net>

In article <huCqh.1309$O02.170 at newssvr11.news.prodigy.net>,
 John Nagle <nagle at animats.com> wrote:

>     How naive (in the sense that compiler people use the term)
> is the current Python system?  For example:
> 
> 	def foo() :
> 	    s = "This is a test"
> 	    return(s)
> 
>  s2 = foo()
> 
> How many times does the string get copied?

All of those just move around pointers to the same (interned) string.

> How about this?
> 
> 	kcount = 1000
> 	s = ''
> 	for i in range(kcount) :
> 	    s += str(i) + ' '
> 
> Is this O(N) or O(N^2) because of recopying of "s"?

This is a well-known (indeed, the canonical) example of quadratic behavior 
in Python.  The standard solution is to store all the strings (again, 
really just pointers to the strings) in a list, then join all the elements:

  temp = []
  for i in range (1000):
    temp.append (str(i))
  s = "".join (temp)

That ends up copying each string once (during the join operation), and is 
O(N) overall.


From nmm1 at cus.cam.ac.uk  Wed Jan 17 04:48:44 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 17 Jan 2007 09:48:44 GMT
Subject: Class data members in C
References: <eojhuu$72c$1@gemini.csx.cam.ac.uk>
	<mailman.2814.1169026003.32031.python-list@python.org>
Message-ID: <eokrds$pta$1@gemini.csx.cam.ac.uk>


In article <mailman.2814.1169026003.32031.python-list at python.org>,
"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
|> > 
|> > Hmm.  The extensions documentation describes how to add instance
|> > members to a class (PyMemberDef), but I want to add a class member.
|> > Yes, this is constant for all instances of the class.
|> 
|> When? - at time of defining base class, between class definition and
|> first instance, at time of creating instance, or after instance creation?
|> 
|> After instance creation is not easy, I think you would have to add 
|> to each instance... 

Oh, one of the first two - I am not bonkers!  Changing a class after
instance creation is guaranteed to cause confusion, if nothing else.


Regards,
Nick Maclaren.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan  8 10:27:33 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 08 Jan 2007 16:27:33 +0100
Subject: multi-threaded webcam with SimpleAsyncHTTPServer.py
References: <mailman.2404.1168235105.32031.python-list@python.org>
Message-ID: <50f675F1fb5uqU3@mid.individual.net>

Ray Schumacher wrote:

> I'll be trying implementing some streaming next.
> Question, though: how can I unblock asyncore.loop(),

Not at all. That's the way event loops work.

> or at least be able to interrupt it?

Sorry for the stupid question, but why would you want to do that?

> Other suggestions?

Yes, why do you call it multithreaded when it's multiplexing? (or
isn't it?)

Regards,


Bj?rn

-- 
BOFH excuse #10:

hardware stress fractures



From gagsl-py at yahoo.com.ar  Fri Jan 26 22:26:09 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 27 Jan 2007 00:26:09 -0300
Subject: Getting the output from a console command while it's been
	generated!
References: <684b0a740701261905o76ca3a9av6425b88cd1c3b9fc@mail.gmail.com>
Message-ID: <epeh79$nok$2@sea.gmane.org>

"Ra?l G?mez C." <nachogomez at gmail.com> escribi? en el mensaje 
news:684b0a740701261905o76ca3a9av6425b88cd1c3b9fc at mail.gmail.com...

> I'm trying to make my apps more informative to the user, so I want to know
> if its possible to get the output of the execution of a console command
> while it's been generated, I mean, I want to get the output from
> commands.getstatusoutput('CMD') while CMD it's been executed and not wait
> until CMD have finished (because CMD take very long time to).

Use the subprocess module and read line by line.

-- 
Gabriel Genellina 




From gandalf at designaproduct.biz  Fri Jan  5 12:28:23 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Fri, 05 Jan 2007 18:28:23 +0100
Subject: program deployment
In-Reply-To: <459E7024.3040204@gmx.net>
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>	<12psqtppgi5cme6@corp.supernews.com>
	<459E7024.3040204@gmx.net>
Message-ID: <459E8AB7.2030806@designaproduct.biz>


> hehehe, but what I am thinking: Is it somehow possible to _really_ hide
> the source from being viewed by other persons when using python? Not
> that I want to do that ( I am an Open Source friend ), but that might
> get others that rely on that (commercial) to use python for more
> projects as it is done now.
>   
Yes. I use Python for running background tasks. I wrote many servers in 
Python and also websites. Users are using it, but they do not have 
access to the .py files. This is one possible way to do it. E.g. hide 
the whole computer system from the end users, and allow them to access 
some restricted interfaces only.

Of course, you cannot distribute or sell these programs without showing 
the source code. You can sell them as a service; that is accessible 
remotely. Or you can sell them together with the machine, cased and 
stamped. :-)

  Laszlo



From persed at princeton.edu  Mon Jan 22 10:49:11 2007
From: persed at princeton.edu (Per B.Sederberg)
Date: Mon, 22 Jan 2007 15:49:11 +0000 (UTC)
Subject: Program eating memory, but only on one machine?
References: <mailman.2986.1169473883.32031.python-list@python.org>
	<c11f84-oo5.ln1@darkstargames.dnsalias.net>
Message-ID: <loom.20070122T164112-825@post.gmane.org>


Wolfgang Draxinger <wdraxinger <at> darkstargames.de> writes:
> 
> > So, does anyone have any suggestions for how I can debug this
> > problem?
> 
> Have a look at the version numbers of the GCC used. Probably
> something in your C code fails if it interacts with GCC 3.x.x.
> It's hardly Python eating memory, this is probably your C
> module. GC won't help here, since then you must add this into
> your C module.
> 
> >  If my program ate up memory on all machines, then I would know
> > where to start and would blame some horrible programming on my
> > end. This just seems like a less straightforward problem.
> 
> GCC 3.x.x brings other runtime libs, than GCC 4.x.x, I would
> check into that direction.
> 

Thank you for the suggestions.  Since my C module is such a small part of the
simulations, I can just comment out the call to that module completely (though I
am still loading it) and fill in what the results would have been with random
values.  Sadly, the program still eats up memory on our cluster.

Still, it could be something related to compiling Python with the older GCC.

I'll see if I can make a really small example program that eats up memory on our
cluster.  That way we'll have something easy to work with.

Thanks,
Per





From oliphant.travis at ieee.org  Mon Jan 15 16:06:56 2007
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Mon, 15 Jan 2007 14:06:56 -0700
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
In-Reply-To: <1168715634.695961.14710@l53g2000cwa.googlegroups.com>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>	<mailman.2496.1168375040.32031.python-list@python.org>	<1168458486.538863.316130@k58g2000hse.googlegroups.com>	<eo78ah$dqc$1@sea.gmane.org>	<mailman.2633.1168583356.32031.python-list@python.org>
	<1168715634.695961.14710@l53g2000cwa.googlegroups.com>
Message-ID: <eogq4f$ehj$1@sea.gmane.org>

oyekomova wrote:
> Thanks to everyone for their excellent suggestions. I was able to
> acheive the following results with all your suggestions. However, I am
> unable to cross file size of 6 million rows. I would appreciate any
> helpful suggestions on avoiding memory errors. None of the solutions
> posted was able to cross this limit.

Did you try using numpy.fromfile ?

This will not require you to allocate more memory than needed.   If you 
specify a count, it will also not have to re-allocate memory in blocks 
as the array size grows.

It's limitation is that it is not a very sophisticated csv reader (it 
only understands a single separator (plus line-feeds are typically seen 
as a separator).

-Travis



From steve at REMOVE.THIS.cybersource.com.au  Sat Jan  6 03:34:10 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 06 Jan 2007 19:34:10 +1100
Subject: attribute decorators
References: <1168058094.179442.173650@s34g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.06.08.34.09.154336@REMOVE.THIS.cybersource.com.au>

On Fri, 05 Jan 2007 20:34:54 -0800, gert wrote:

> Would it not be nice if you could assign decorators to attributes too ?
> for example
> 
> class C:
>   @staticattribute
>   data='hello'


You can. You just have to write it as:

class C:
    data = staticattribute('hello')

(Of course, writing the staticattribute function is a non-trivial problem.)


> or
> 
> class C:
>   @privateattribute
>   data='hello'

That would be written as 

class C:
    _data = 'hello'

or possibly 

class C:
    __data = 'hello' 

depending on whether you want private attributes to be by convention or by
name-mangling.


-- 
Steven.



From jeff at taupro.com  Sat Jan 27 06:11:58 2007
From: jeff at taupro.com (Jeff Rush)
Date: Sat, 27 Jan 2007 05:11:58 -0600
Subject: New vs Old Style Python Classes in C Extensions?
Message-ID: <45BB337E.5060906@taupro.com>

While I have a reasonable understanding of the differences in new-style versus 
old-style classes, tonight while working a C extension module I realized I 
don't know how to indicate which style my C extension module should appear as.

I'm following the Python docs for extended modules, but it doesn't say in 
there anyplace I can find which style I'm creating.  My clue that something 
was wrong is when this:

from cextension import Context

class MyContext(Context):

     def __init__(self):
         super(Context, self).__init__()

repeatedly and reliably failed with a corrupted C data structure, while this:

class MyContext(Context):

     def __init__(self):
         Context.__init__()

worked without any problems.  As I understand it, the former uses new-style 
semantics while the latter uses old-style, and -thats- when I realized I have 
no idea which my C extension implemented.

Any enlightenment?

-Jeff



From duncan.booth at invalid.invalid  Thu Jan 18 08:41:32 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 Jan 2007 13:41:32 GMT
Subject: generate tuples from sequence
References: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>
	<eol9ac$v3l$02$1@news.t-online.com> <KaCrh.1768$R76.979@trnddc05>
	<eon8k9$39m$02$1@news.t-online.com>
	<Xns98BC7B2071AD8duncanbooth@127.0.0.1>
	<eonqfo$p01$00$1@news.t-online.com>
Message-ID: <Xns98BC8B4B871E1duncanbooth@127.0.0.1>

Peter Otten <__peter__ at web.de> wrote:

> Let's see if I understand the above: In C a call
> 
> f(g(), g())
> 
> may result in machine code equivalent to either
> 
> x = g()
> y = g()
> f(x, y)
> 
> or
> 
> y = g()
> x = g()
> f(x, y)
> 
> Is that it?
> 

Yes, or changing one of the calls to h() and compiling with 
"cl -Fat.asm -Ox -c t.c":

------ t.c --------
extern int f(int a, int b);
extern int g();
extern int h();

int main(int argc, char **argv) {
    return f(g(), h());
}
-------------------

The output file:
------- t.asm -----
; Listing generated by Microsoft (R) Optimizing Compiler Version 13.10.3077 

	TITLE	t.c
	.386P
include listing.inc
if @Version gt 510
.model FLAT
else
_TEXT	SEGMENT PARA USE32 PUBLIC 'CODE'
_TEXT	ENDS
_DATA	SEGMENT DWORD USE32 PUBLIC 'DATA'
_DATA	ENDS
CONST	SEGMENT DWORD USE32 PUBLIC 'CONST'
CONST	ENDS
_BSS	SEGMENT DWORD USE32 PUBLIC 'BSS'
_BSS	ENDS
$$SYMBOLS	SEGMENT BYTE USE32 'DEBSYM'
$$SYMBOLS	ENDS
_TLS	SEGMENT DWORD USE32 PUBLIC 'TLS'
_TLS	ENDS
FLAT	GROUP _DATA, CONST, _BSS
	ASSUME	CS: FLAT, DS: FLAT, SS: FLAT
endif

INCLUDELIB LIBC
INCLUDELIB OLDNAMES

PUBLIC	_main
EXTRN	_f:NEAR
EXTRN	_g:NEAR
EXTRN	_h:NEAR
; Function compile flags: /Ogty
_TEXT	SEGMENT
_argc$ = 8						; size = 4
_argv$ = 12						; size = 4
_main	PROC NEAR
; File c:\temp\t.c
; Line 6
	call	_h
	push	eax
	call	_g
	push	eax
	call	_f
	add	esp, 8
; Line 7
	ret	0
_main	ENDP
_TEXT	ENDS
END
-------------------------


From gagsl-py at yahoo.com.ar  Sat Jan 13 08:38:25 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 13 Jan 2007 10:38:25 -0300
Subject: How to run external program?
References: <1168594577.397453.320380@a75g2000cwd.googlegroups.com><mailman.2637.1168595038.32031.python-list@python.org>
	<1168596401.191648.79440@38g2000cwa.googlegroups.com>
Message-ID: <eoancd$o7f$1@sea.gmane.org>

"Lad" <python at hope.cz> escribi? en el mensaje 
news:1168596401.191648.79440 at 38g2000cwa.googlegroups.com...

> mpeg = "mpeg.exe -i %s codec mp3  -s 320x240 %s" % (sourcefile,
> targetfile)
> stdin, stdout, stderr = os.popen3(mpeg)
> mpegresult = stdout.read()
> mpegerrors = stderr.read()
> stdin.close(); stdout.close(); stderr.close()
> print ffmpegerrors
> print ffmpegresult
> #########
>
> It works  if the sourcefile is small but if it is large( 30MB) it does
> NOT work.It hangs or the file is not converted in full.
> Any advice how I should change the program?

What do you mean by "NOT work"?
Does it "work" if you execute the same line from the command prompt?

-- 
Gabriel Genellina 





From larry.bates at websafe.com  Mon Jan 15 19:42:02 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 15 Jan 2007 18:42:02 -0600
Subject: Anyone has a nice "view_var" procedure ?
In-Reply-To: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
References: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
Message-ID: <45AC1F5A.90403@websafe.com>

Stef Mientki wrote:
> hello,
> 
> Is there some handy/ nice manner to view the properties of some variable ?
> As a newbie, I often want to see want all the properties of a var,
> and also some corner values (large arrays) etc.
> 
> Probably it's not so difficult,
> but I don't see how to distinguish for example between a string and an
> array. An array has a shape, a string not etc.
> 
> 
> thanks,
> Stef Mientki

Others have given some suggestions, but I thought I'd put in my
thoughts also.  When I first started using Python I was looking for
exactly what you describe.  After using a while, you begin to understand
that the objects in Python can be so complex (lists of dictionaries that
contain lists and other dictionaries, lists of class instances that can
contain other class instances, that can contain...., you get the picture).
You have to begin to think about navigating through this by using dir(),
vars() and pprint.pprint().  Unlike older programming languages there is
no limit to how you can mix/match values within an object.

Also in standard Python lists (arrays?) don't have shape (there are add
on modules that give you this type of feature).  Everything is a
collection of objects.

class foo:
    def __init__(self):
        self.x=1
        self.y=2

l=[[1,2,3], 'test', 6, 3.14159, {'a':1, 'b':2}, foo()]

a list with:
a list as first element
a string as the second element
an integer as the third element
a float as the third element
a dictionary as the fourth element
a class instance as the fifth element

The tutorial is a good place to start if you haven't already looked at
it.

-Larry Bates


From steven.bethard at gmail.com  Sat Jan 20 15:49:52 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 20 Jan 2007 13:49:52 -0700
Subject: pyparsing Combine without merging sub-expressions
Message-ID: <D8OdnfDqyvnyHS_YnZ2dnUVZ_syunZ2d@comcast.com>

Within a larger pyparsing grammar, I have something that looks like::

     wsj/00/wsj_0003.mrg

When parsing this, I'd like to keep around both the full string, and the 
AAA_NNNN substring of it, so I'd like something like::

     >>> foo.parseString('wsj/00/wsj_0003.mrg')
     (['wsj/00/wsj_0003.mrg', 'wsj_0003'], {})

How do I go about this? I was using something like::

     >>> digits = pp.Word(pp.nums)
     >>> alphas = pp.Word(pp.alphas)
     >>> wsj_name = pp.Combine(alphas + '_' + digits)
     >>> wsj_path = pp.Combine(alphas + '/' + digits + '/' + wsj_name +
     ... '.mrg')

But of course then all I get back is the full path::

     >>> wsj_path.parseString('wsj/00/wsj_0003.mrg')
     (['wsj/00/wsj_0003.mrg'], {})

I could leave off the final Combine and add a parse action::

     >>> wsj_path = alphas + '/' + digits + '/' + wsj_name + '.mrg'
     >>> def parse_wsj_path(string, index, tokens):
     ...     wsj_name = tokens[4]
     ...     return ''.join(tokens), wsj_name
     ...
     >>> wsj_path.setParseAction(parse_wsj_path)
     >>> wsj_path.parseString('wsj/00/wsj_0003.mrg')
     ([('wsj/00/wsj_0003.mrg', 'wsj_0003')], {})

But that then allows whitespace between the pieces of the path, which 
there shouldn't be::

     >>> wsj_path.parseString('wsj / 00 / wsj_0003.mrg')
     ([('wsj/00/wsj_0003.mrg', 'wsj_0003')], {})

How do I make sure no whitespace intervenes, and still have access to 
the sub-expression?

Thanks,

STeVe


From weekender_ny at yahoo.com  Thu Jan  4 18:23:37 2007
From: weekender_ny at yahoo.com (John)
Date: 4 Jan 2007 15:23:37 -0800
Subject: cache line length of a machine
Message-ID: <1167953016.952907.279260@i15g2000cwa.googlegroups.com>


How do I find out the cache line length of a machine in python?

Thanks,
--j



From laurent.pointal at limsi.fr  Mon Jan 15 10:48:06 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 15 Jan 2007 16:48:06 +0100
Subject: check if there is data in stdin without blocking
In-Reply-To: <uhNqh.47996$X97.358@newsfe18.lga>
References: <4PMqh.47441$X97.9536@newsfe18.lga>
	<uhNqh.47996$X97.358@newsfe18.lga>
Message-ID: <eog8hb$ke4$1@upsn250.cri.u-psud.fr>

hg a ?crit :
> hg wrote:
> 
>> Hi,
>>
>> Is there a way ? ... select ?
>>
>>
>>
>> hg
> PS:
> 
> import sys
> import select
> 
> l_r = select.select([sys.stdin],[],[],0)
> 
> gives me:
>   File "select.py", line 2, in ?
>     import select
>   File "/home/philippe/Desktop/select.py", line 4, in ?
>     l_r = select.select([sys.stdin],[],[],0)
> TypeError: 'module' object is not callable
> 
> 

Wont work under Windows:
>>> help(select.select)
...<zip>...
    *** IMPORTANT NOTICE ***
    On Windows, only sockets are supported; on Unix, all file descriptors.



If under Unix, maybe sys.stdin.fileno() is a valid descriptor for
select. Just test it.

And if under Windows, you may take a look at
22.1 msvcrt - Useful routines from the MS VC++ runtime
22.1.2 Console I/O
kbhit( ) - Return true if a keypress is waiting to be read.


From bignose+hates-spam at benfinney.id.au  Tue Jan 16 17:16:34 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 17 Jan 2007 09:16:34 +1100
Subject: How to determine what exceptions a method might raise?
References: <12qq98ijkn5mld8@corp.supernews.com>
Message-ID: <87y7o2aa7x.fsf@benfinney.id.au>

Ed Jensen <ejensen at visi.com> writes:

> it would be handy if there was something I could do in the
> interactive interpreter to make it tell me what exceptions the file
> method might raise (such as IOError).

For what purpose would this be handy? Surely the benefit of the
interactive interpreter is that you can simply try it out and *see*
what happens.

But, in case it helps: Any code may raise any exception at any
time. This is a feature, since it encourages program that are tested
properly.

-- 
 \                      "I'm a great lover, I'll bet."  -- Emo Philips |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From steve at REMOVEME.cybersource.com.au  Wed Jan 31 02:34:25 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 31 Jan 2007 18:34:25 +1100
Subject: how to "free" an object/var ?
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
	<epolgl$8i4$1@zinnia.noc.ucla.edu>
	<pan.2007.01.31.06.52.12.82782@REMOVEME.cybersource.com.au>
	<1170228172.691120.200280@a75g2000cwd.googlegroups.com>
Message-ID: <pan.2007.01.31.07.34.24.221453@REMOVEME.cybersource.com.au>

On Tue, 30 Jan 2007 23:22:52 -0800, Paddy wrote:

>> As far as I know there is no way to force the deletion of an object
>> even if it is in use. This is a Good Thing.
>>
>> --
>> Steven D'Aprano
> 
> The folowing will make the data available for garbage collection no
> matter what references it:
> 
>>>> l = ["data"] *10
>>>> l
> ['data', 'data', 'data', 'data', 'data', 'data', 'data', 'data', 'data',
> 'data']
>>>> l2 = l
>>>> l[:] = []
>>>> l2
> []

Sort of.

What happens is that both l and l2 are names referring to the same list.
After executing l[:] the *contents* of the list change, from lots of
"data" to nothing. Naturally both l and l2 see the change, because they
both point to the same list. But the original contents of the list still
exist until the garbage collector sees that they are no longer in use,
and then frees them.

You can prove this by doing something like this:

data = "\0"*1000000 # one (decimal) megabyte of data
L = [data] # put it in a list
L[:] = []  # "free" the contents of the list
assert len(data) == 1000000
# but the megabyte of data still there

Again, you can't force Python to free up memory that is still in use.
If you could, that would be a bug.



-- 
Steven D'Aprano 



From metsakuri at gmail.com  Thu Jan  4 02:33:21 2007
From: metsakuri at gmail.com (tonisk)
Date: 3 Jan 2007 23:33:21 -0800
Subject: question on creating class
In-Reply-To: <1167895677.041759.230190@42g2000cwt.googlegroups.com>
References: <1167895677.041759.230190@42g2000cwt.googlegroups.com>
Message-ID: <1167896001.235226.307830@6g2000cwy.googlegroups.com>

You can always rename your defined clas afterwards

class TestClass:
    pass

myClass = TestClass

--
T?nis

On Jan 4, 9:27 am, "wcc" <wcc... at gmail.com> wrote:
> Hello,
>
> How do I create a class using a variable as the class name?
>
> For example, in the code below, I'd like replace the line
>
> class TestClass(object):
> with something like
> class eval(className) (object):
>
> Is it possible?  Thanks for your help.
>
> className = "TestClass"
>
> class TestClass(object):
>     def __init__(self):
>         print "Creating object of TestClass..."
>
>     def method1(self):
>         print "This is a method."
>
> if __name__ == "__main__":
>     o = TestClass()
>     o.method1()
> 
> --
> wcc



From robert.kern at gmail.com  Wed Jan 24 16:18:07 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 24 Jan 2007 15:18:07 -0600
Subject: Simple Matrix class
In-Reply-To: <1169670271.547292.141110@l53g2000cwa.googlegroups.com>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>	<mailman.3049.1169600368.32031.python-list@python.org>	<1169602411.917985.89840@l53g2000cwa.googlegroups.com>	<mailman.3051.1169604934.32031.python-list@python.org>	<1169617221.481444.135820@v45g2000cwv.googlegroups.com>	<mailman.3094.1169659321.32031.python-list@python.org>	<1169664540.120687.211350@s48g2000cws.googlegroups.com>	<mailman.3108.1169668074.32031.python-list@python.org>
	<1169670271.547292.141110@l53g2000cwa.googlegroups.com>
Message-ID: <ep8ieh$j7$1@sea.gmane.org>

Paul McGuire wrote:
> On Jan 24, 1:47 pm, Robert Kern <robert.k... at gmail.com> wrote:
>> Paul McGuire wrote:
>>> And the purpose/motivation for "reimplementing it better" would be
>>> what, exactly?  So I can charge double for it?
>> So you can have accurate results, and you get a good linear solver out of the
>> process. The method you use is bad in terms of accuracy as well as efficiency.
> 
> Dang, I thought I was testing the results sufficiently!  What is the
> accuracy problem?  In my test cases, I've randomly created test
> matrices, inverted, then multiplied, then compared to the identity
> matrix, with the only failures being when I start with a singular
> matrix, which shouldn't invert anyway.

Ill-conditioned matrices. You should grab a copy of _Matrix Computations_ by
Gene H. Golub and Charles F. Van Loan.

For example, try the Hilbert matrix n=6.

  H_ij = 1 / (i + j - 1)

  http://en.wikipedia.org/wiki/Hilbert_matrix

While all numerical solvers have issues with ill-conditioned matrices, your
method runs into them faster.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From parallelpython at gmail.com  Sat Jan 13 23:00:15 2007
From: parallelpython at gmail.com (parallelpython at gmail.com)
Date: 13 Jan 2007 20:00:15 -0800
Subject: Threaded for loop
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
Message-ID: <1168747208.275625.55590@51g2000cwl.googlegroups.com>

John wrote:
> I want to do something like this:
>
> for i = 1 in range(0,N):
>  for j = 1 in range(0,N):
>    D[i][j] = calculate(i,j)
>
> I would like to now do this using a fixed number of threads, say 10
> threads.
> What is the easiest way to do the "parfor" in python?
>
> Thanks in advance for your help,

As it was already mentioned before threads will not help in terms of
parallelism (only one thread will be actually working). If you want to
calculate this in parallel here is an easy solution:

import ppsmp

#start with 10 processes
srv = ppsmp.Server(10)

f = []

for i = 1 in range(0,N):
  for j = 1 in range(0,N):
      #it might be a little bit more complex if 'calculate' depends on
other modules or calls functions
      f.append(srv.submit(calculate, (i,j)))

for i = 1 in range(0,N):
  for j = 1 in range(0,N):
     D[i][j] = f.pop(0)

You can get the latest version of ppsmp module here:
http://www.parallelpython.com/



From goodepic at gmail.com  Fri Jan  5 15:55:53 2007
From: goodepic at gmail.com (goodepic)
Date: 5 Jan 2007 12:55:53 -0800
Subject: PyGreSQL Install
Message-ID: <1168030553.913612.309020@q40g2000cwq.googlegroups.com>

I successfully installed postgresql and pygresql from source on my
MacBook 2ghz Intel core duo running os x 10.4.8.  However, pygresql
installed under the defualt python 2.3 installation, while I've been
upgrading and working in 2.5, and have invested too much time to go
back to 2.3.  I definitely don't know where every file is, but I know
that the site-packages folder where I need pgdb to be is
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages.
 This is where I have pypar, pynum, numeric, etc.  PyGreSQL installed
in the default
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages.


Anyone know where I can edit setup.py or what flags I can use to force
the install onto 2.5?

Thanks!



From nachogomez at gmail.com  Sun Jan 28 21:54:03 2007
From: nachogomez at gmail.com (=?UTF-8?Q?Ra=C3=BAl_G=C3=B3mez_C.?=)
Date: Sun, 28 Jan 2007 22:54:03 -0400
Subject: Getting the output from a console command while it's been
	generated!
In-Reply-To: <epeh79$nok$2@sea.gmane.org>
References: <684b0a740701261905o76ca3a9av6425b88cd1c3b9fc@mail.gmail.com>
	<epeh79$nok$2@sea.gmane.org>
Message-ID: <684b0a740701281854r7108415aqb43221ab5ad9a7d6@mail.gmail.com>

I can't use the subprocess module because my app needs to be compatible with
Python 2.3 so, is there another approach to this problem???

Thanks!

On 1/26/07, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
>
> "Ra?l G?mez C." <nachogomez at gmail.com> escribi? en el mensaje
> news:684b0a740701261905o76ca3a9av6425b88cd1c3b9fc at mail.gmail.com...
>
> > I'm trying to make my apps more informative to the user, so I want to
> know
> > if its possible to get the output of the execution of a console command
> > while it's been generated, I mean, I want to get the output from
> > commands.getstatusoutput('CMD') while CMD it's been executed and not
> wait
> > until CMD have finished (because CMD take very long time to).
>
> Use the subprocess module and read line by line.
>
> --
> Gabriel Genellina
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070128/3663f8d5/attachment.html>

From exarkun at divmod.com  Wed Jan 31 15:37:58 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 31 Jan 2007 15:37:58 -0500
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <1170275061.786779.74910@a34g2000cwb.googlegroups.com>
Message-ID: <20070131203758.25807.1007628884.divmod.quotient.4971@ohm>

On 31 Jan 2007 12:24:21 -0800, Carl Banks <pavlovevidence at gmail.com> wrote:
>Michele Simionato wrote:
>> On Jan 31, 5:23 pm, "Frank Potter" <could.... at gmail.com> wrote:
>> > I want to find a multithreaded downloading lib in python,
>> > can someone recommend one for me, please?
>> > Thanks~
>>
>> Why do you want to use threads for that? Twisted is the
>> obvious solution for your problem,
>
>Overkill?  Just to download a few web pages?  You've got to be
>kidding.

Better "overkill" (whatever that is) than wasting time re-implementing
the same boring thing over and over for no reason.

Jean-Paul


From uymqlp502 at sneakemail.com  Tue Jan 23 21:07:55 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: 23 Jan 2007 18:07:55 -0800
Subject: Overloading assignment operator
In-Reply-To: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <1169604475.177104.40330@s48g2000cws.googlegroups.com>

Achim Domma wrote:
> Hi,
>
> I want to use Python to script some formulas in my application. The user
> should be able to write something like
>
> A = B * C
>
> where A,B,C are instances of some wrapper classes. Overloading * is no
> problem but I cannot overload the assignment of A. I understand that
> this is due to the nature of Python, but is there a trick to work around
> this?
> All I'm interested in is a clean syntax to script my app. Any ideas are
> very welcome.
>
> regards,
> Achim

Why do you need to overload assignment anyway? If you overloaded "*"
properly, it should return
the result you want, which you then "assign" to A as usual. Maybe I'm
missing something.



From bob at passcal.nmt.edu  Fri Jan 26 13:26:46 2007
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Fri, 26 Jan 2007 11:26:46 -0700
Subject: Fixed length lists from .split()?
References: <2007012611072716807-bob@passcalnmtedu>
	<Xns98C4B9784784Eduncanbooth@127.0.0.1>
Message-ID: <2007012611264650073-bob@passcalnmtedu>

On 2007-01-26 11:13:56 -0700, Duncan Booth <duncan.booth at invalid.invalid> said:

> Bob Greschke <bob at passcal.nmt.edu> wrote:
> 
>> Is there a fancy way to get Parts=Line.split(";") to make Parts always 
>> have three items in it, or do I just have to check the length of Parts 
>> and loop to add the required missing items (this one would just take 
>> Parts+=[""], but there are other types of lines in the file that have 
>> about 10 "fields" that also have this problem)?
> 
>>>> def nsplit(s, sep, n):
> 	return (s.split(sep) + [""]*n)[:n]
> 
>>>> nsplit("bcsn; 1000001; 1456", ";", 3)
> ['bcsn', ' 1000001', ' 1456']
>>>> nsplit("bcsn; 1000001", ";", 3)
> ['bcsn', ' 1000001', '']

That's fancy enough. :)  I didn't know you could do  [""]*n.  I never 
thought about it before.

Thanks!

Bob



From redefined.horizons at gmail.com  Fri Jan  5 23:27:07 2007
From: redefined.horizons at gmail.com (redefined.horizons at gmail.com)
Date: 5 Jan 2007 20:27:07 -0800
Subject: Adding a directory to the Python System Path - Edit the registry?
In-Reply-To: <459e8fa5$0$335$e4fe514c@news.xs4all.nl>
References: <1168017552.010631.276080@s34g2000cwa.googlegroups.com>
	<459e8fa5$0$335$e4fe514c@news.xs4all.nl>
Message-ID: <1168057627.305211.151320@s34g2000cwa.googlegroups.com>

Thanks Martin.

I'll take a look at the documentation you pointed out.

Scott

Martin P. Hellwig wrote:
> redefined.horizons at gmail.com wrote:
> > I have been trying to find a way to add a directory to Python's sytem
> > path on my MS Windows XP computer. I did some searching online, but the
> > only solution I found involved editing the MS Windows Registry. That
> > seemed a little to hard core. Is there another easier way to do this?
> >
> > Thanks,
> >
> > Scott Huey
> >
>
> Take a look at:
> http://docs.python.org/tut/node8.html
>
> Specifically 6.1.1 and 6.2, perhaps that might answer your question.
> 
> Cheers
> 
> -- 
> mph



From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 20 06:09:19 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 20 Jan 2007 22:09:19 +1100
Subject: Match 2 words in a line of file
References: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
	<1169166223.073714.109620@51g2000cwl.googlegroups.com>
	<1169172293.938820.103400@51g2000cwl.googlegroups.com>
	<1169172954.107365.133950@51g2000cwl.googlegroups.com>
	<1169175299.490994.244700@51g2000cwl.googlegroups.com>
	<e3u1r25m8pnjfufna41lu4tjvq1uspeh3o@4ax.com>
	<1169276257.512909.92380@v45g2000cwv.googlegroups.com>
Message-ID: <pan.2007.01.20.11.09.18.350763@REMOVE.THIS.cybersource.com.au>

On Fri, 19 Jan 2007 22:57:37 -0800, Rickard Lindberg wrote:

> Daniel Klein wrote:
> 
>> 2) This can be resolved with
>>
>> templine = ' ' + line + ' '
>> if ' ' + word1 + ' ' in templine and ' ' + word2 + ' ' in templine:
> 
> But then you will still have a problem to match the word "foo" in a
> string like "bar (foo)".

That's a good point for a general word-finder application, but in the case
of the Original Poster's problem, it depends on the data he is dealing
with and the consequences of errors.

If the consequences are serious, then he may need to take extra
precautions. But if the consequences are insignificant, then the fastest,
most reliable solution is probably a simple generator:

def find_new_events(text):
    for line in text.splitlines():
        line = line.lower() # remove this for case-sensitive matches
        if "event" in line and "new" in line:
            yield line

To get all the matching lines at once, use list(find_new_events(test)).

This is probably going to be significantly faster than a regex.

So that's three possible solutions:

(1) Use a quick non-regex matcher, and deal with false positives later;

(2) Use a slow potentially complicated regex; or

(3) Use a quick non-regex matcher to eliminate obvious non-matches, then
pass the results to a slow regex to eliminate any remaining false
positives.


Which is best will depend on the O.P.'s expected data. As always, resist
the temptation to guess which is faster, and instead use the timeit module
to measure it.


-- 
Steven.



From S.Mientki-nospam at mailbox.kun.nl  Tue Jan 30 18:53:51 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Wed, 31 Jan 2007 00:53:51 +0100
Subject: how to "free" an object/var ?
In-Reply-To: <epolgl$8i4$1@zinnia.noc.ucla.edu>
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
	<epolgl$8i4$1@zinnia.noc.ucla.edu>
Message-ID: <981d4$45bfda7f$d443bb3a$9863@news.speedlinq.nl>

James Stroud wrote:
> Stef Mientki wrote:
>> If I create a large array of data or class,
>> how do I destroy it (when not needed anymore) ?
>>
>> Assign it to an empty list ?
>>
>> thanks,
>> Stef Mientki
> 
> It will be gc'd when you leave the scope or you can call del() to 
> explicitly get rid of the object if its existence bothers you.
> 
> James
thanks James,
indeed, large objects, are sometimes bothering me,
and assigning it to an empty list requires comment ;-)
cheers,
Stef


From sturlamolden at yahoo.no  Sun Jan 14 11:06:38 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 14 Jan 2007 08:06:38 -0800
Subject: Threaded for loop
In-Reply-To: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
Message-ID: <1168790797.930958.327230@11g2000cwr.googlegroups.com>


John wrote:
> I want to do something like this:
>
> for i = 1 in range(0,N):
>  for j = 1 in range(0,N):
>    D[i][j] = calculate(i,j)
>
> I would like to now do this using a fixed number of threads, say 10
> threads.

Why do you want to run this in 10 threads? Do you have 10 CPUs?

If you are concerned about CPU time, you should not be using threads
(regardless of language) as they are often implemented with the
assumption that they stay idle most of the time (e.g. win32 threads and
pthreads). In addition, CPython has a global interpreter lock (GIL)
that prevents the interpreter from running on several processors in
parallel. It means that python threads are a tool for things like
writing non-blocking i/o and maintaining responsiveness in a GUI'. But
that is what threads are implemented to do anyway, so it doesn't
matter. IronPython and Jython do not have a GIL.

In order to speed up computation you should run multiple processes and
do some sort of IPC. Take a look at MPI (e.g. mpi4py.scipy.org) or
'parallel python'. MPI is the de facto industry standard for dealing
with CPU bound problems on systems with multiple processors, whether
the memory is shared or distributed does not matter. Contrary to common
belief, this approach is more efficient than running multiple threads,
sharing memory and synchronizong with mutexes and event objects - even
if you are using a system unimpeded by a GIL.

The number of parallel tasks should be equal to the number of available
CPU units, not more, as you will get excessive context shifts if the
number of busy threads or processes exceed the number of computational
units. If you only have two logical CPUs (e.g. one dual-core processor)
you should only run two parallel tasks - not ten. If you try to
parallelize using additional tasks (e.g. 8 more), you will just waste
time doing more context shifts, more cache misses, etc. But if you are
a lucky bastard with access to a 10-way server, sure run 10 tasks in
parallel.



From tomas at fancy.org  Fri Jan  5 17:40:28 2007
From: tomas at fancy.org (Tom Plunket)
Date: Fri, 05 Jan 2007 14:40:28 -0800
Subject: A python library to convert RTF into PDF ?
References: <1167846487.943390.192130@a3g2000cwd.googlegroups.com>
	<5stnp25m2uffc4n5k7g9e68hk2l85u4fmm@4ax.com>
	<1167850322.373355.327020@s34g2000cwa.googlegroups.com>
Message-ID: <orktp2p8l3bnfj8oj3u0g04ep03gjtbo7k@4ax.com>

leonel.gayard at gmail.com wrote:

> First, pdflatex is too slow. Second, my templates are M$-Word doc
> files, and they cannot be easily converted to tex. I have tried to
> convert them to tex using OpenOffice, but the result is ugly as hell.

Ok, have you tried using the PDF printers (I've used PDFfactory before,
but there are a number of free ones on SourceForge that may be worth a
shot), and just using MSWord via COM to print to that printer?

(This line of answers merely because nobody seems to know of a
directly-Python solution.)


-tom!

-- 


From gagsl-py at yahoo.com.ar  Sun Jan 14 12:27:37 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 14 Jan 2007 14:27:37 -0300
Subject: Tkinter code (with pmw) executing to soon please help
References: <1168746063.322340.10410@l53g2000cwa.googlegroups.com><mailman.2704.1168749021.32031.python-list@python.org>
	<1168760423.608731.213550@a75g2000cwd.googlegroups.com>
Message-ID: <eodp67$97k$1@sea.gmane.org>

<Eric_Dexter at msn.com> escribi? en el mensaje 
news:1168760423.608731.213550 at a75g2000cwd.googlegroups.com...

> button[num] = Tkinter.Button(frame,text =  returnstring,
> command=callback(returnstring))#
>
> I understand this part of it
>
> def callback(text):
>   def handler(event):
>     print text

> It stopped calling it automaticaly but will not do anything when I
> click on the button.  Does something have to change on this line as
> well.

Sorry, I overlooked your example. For a button, command should be a function 
with no arguments (and I forget to return the handler, as someone already 
pointed out):

def callback(text):
    def handler():
        print text
    return handler

-- 
Gabriel Genellina 





From jrpfinch at gmail.com  Thu Jan 11 10:32:53 2007
From: jrpfinch at gmail.com (jrpfinch)
Date: 11 Jan 2007 07:32:53 -0800
Subject: Newbie question: SMTP -> SQL Server
Message-ID: <1168529572.873867.207730@k58g2000hse.googlegroups.com>

I have an externally-written piece of software that spits out emails
using SMTP (a few hundred per hour) and I would like to dump the
content of them in an MS SQL Server database.

I have barely used Python before but it looks as if it could do the
job.  I have no experience with mail agents.  My starting point is this
recipe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440690

I know that there are various libraries that can connect to MS SQL
server and I am going to research these.

I have two questions:

i)  Does this sound like an efficient way of transferring data to the
database?
ii)  Looking through the Python documentation, I cannot see a way to
set the password on the SMTP server.  I would like to have a password -
does anyone know how to use the recipe above to set one?

Any other useful nudges in the right direction appreciated.

Many thanks

Jon



From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 12 06:44:33 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 12 Jan 2007 22:44:33 +1100
Subject: Learning Python book, new edition?
References: <mailman.2635.1168592793.32031.python-list@python.org>
	<slrneqepvc.c32.swayne@wayne.powernet>
Message-ID: <pan.2007.01.12.11.44.32.250129@REMOVE.THIS.cybersource.com.au>

On Fri, 12 Jan 2007 04:50:21 -0600, Steven Wayne wrote:

[snip stupid disclaimer and response to it]

> Unlawful how? You've already given permission for an "agent responsible
> for delivering the message" to broadcast it around the world.
> 
> Sorry for the rant, but I'm an email admin and I've just been told about
> the change to UK law.

What change to UK law?

> I'm giving our legal department even more grief.

For those interested in an amateur analysis of email disclaimers:

http://goldmark.org/jeff/stupid-disclaimers/

If you get a Forbidden error, try going to the top level of the site first
http://goldmark.org/ and navigating down by following links. Try not to
laugh at all the "an error occurred while processing this directive"
messages.



-- 
Steven.



From theller at ctypes.org  Thu Jan  4 04:10:07 2007
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 04 Jan 2007 10:10:07 +0100
Subject: where to ask questions related to comtypes?
In-Reply-To: <1167891509.842292.125420@i80g2000cwc.googlegroups.com>
References: <1167891509.842292.125420@i80g2000cwc.googlegroups.com>
Message-ID: <enig9f$dmt$1@sea.gmane.org>

wcc schrieb:
> Hello group,
> 
> Is there a separate mailing list for comtypes? Or this is the
> appropriate place to post questions related to this package(from Thomas
> Heller)? 

It seems the python-win32 mailing list is the place where the most COM knowledge
is, so that would be most appropriate.  Other places are *this* list or the
ctypes-users lists (since comtypes is based on ctypes).

Thomas



From gagsl-py at yahoo.com.ar  Sun Jan  7 14:07:56 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 11:07:56 -0800
Subject: find a .py path
In-Reply-To: <mailman.2328.1168014793.32031.python-list@python.org>
References: <nKunh.45586$gl2.35454@newsfe16.lga>
	<0Nunh.45640$gl2.30462@newsfe16.lga>
	<mailman.2328.1168014793.32031.python-list@python.org>
Message-ID: <1168196876.449368.111080@q40g2000cwq.googlegroups.com>

On 5 ene, 13:33, Laszlo Nagy <gand... at designaproduct.biz> wrote:

> Be aware with this. It is different when you do
>
> /usr/bin/python prog.py
>
> and
>
> ./prog.py
>
> In the first case, sys.argv[0] will be /usr/bin/python!

No, sys.argv[0] is always the running script, and sys.argv[1] the first
argument after the script, and so on. It doesn't matter if you call
python implicitely, or with other options. Try this:
/usr/bin/python -i -u -O prog.py

-- 
Gabriel Genellina



From steven.bethard at gmail.com  Wed Jan 31 16:41:43 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 31 Jan 2007 14:41:43 -0700
Subject: SyntaxError: 'return' outside function
In-Reply-To: <1170278702.599741.212420@l53g2000cwa.googlegroups.com>
References: <1170278702.599741.212420@l53g2000cwa.googlegroups.com>
Message-ID: <U_idnVg43saNkFzYnZ2dnUVZ_trinZ2d@comcast.com>

Melih Onvural wrote:
> Has anyone seen this error before and been able to solve it? I can't
> seem to find anything that leads to a solution. I found this post
> http://zope.org/Collectors/Zope/1809, but can't really understand it.
> I've attached my code below to see if anything looks funny. It happens
> at the very last return at the end. Thanks in advance,
> 
> --melih
> 
> ===========Code========
> 
> 	def legiturl(self, url):
> 	# this breaks down the url into 6 components to make sure it's
> "legit"
> 		t = urlparse.urlparse(url)
> 
> 		if t[0] != 'http':
> 			return ""
> 
>         # remove URL fragments, but not URL
>         if len(t[5]) > 0:
>         	url = urlparse.urlunparse((t[0],t[1],t[2],"","",""))
>         	t = urlparse.urlparse(url)
> 
>         # stupid parser sometimes leaves frag in path
>         x = find(t[2], '#')
>         if x >= 0:
>         	return ""

Looks like you're mixing tabs and spaces.  Your "return" statement is 
outside the "legiturl" function.

Steve


From wccppp at gmail.com  Thu Jan  4 02:27:57 2007
From: wccppp at gmail.com (wcc)
Date: 3 Jan 2007 23:27:57 -0800
Subject: question on creating class
Message-ID: <1167895677.041759.230190@42g2000cwt.googlegroups.com>

Hello,

How do I create a class using a variable as the class name?

For example, in the code below, I'd like replace the line

class TestClass(object):
with something like
class eval(className) (object):

Is it possible?  Thanks for your help.

className = "TestClass"

class TestClass(object):
    def __init__(self):
        print "Creating object of TestClass..."

    def method1(self):
        print "This is a method."

if __name__ == "__main__":
    o = TestClass()
    o.method1()

--
wcc



From Barry.Carroll at psc.com  Wed Jan 17 14:31:32 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Wed, 17 Jan 2007 11:31:32 -0800
Subject: *POLL* How many sheeple believe in the 911 fairy tale and
	willingto accept an Orwellian doublespeak and enslavement world ?
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A81@eugsrv400.psc.pscnet.com>

> -----Original Message-----
> From: st911 at rock.com [mailto:st911 at rock.com]
> Sent: Wednesday, January 17, 2007 11:05 AM
> To: python-list at python.org
> Subject: Re: *POLL* How many sheeple believe in the 911 fairy tale and
> willingto accept an Orwellian doublespeak and enslavement world ?
> 
> 
> Robert Hicks wrote:
> > Please, none of the real facts points to anything else except what
> > actually happened. Two planes hit two towers and they came down.
> 
> The issue is the causality of the towers coming down.
> 
> A magician pulls appears to cast a spell
> and out comes a rabbit out of his hat. There will always be fools who
> will accept this causality and others who know better the laws of
> conservation.
> 

Ladies and Gentlemen:

PLEASE take this discussion to a more appropriate forum.  There are many

forums where people will be happy to debate this: physics, firefighting,
metallurgy, geopolitics, etc.  This forum is about the Python
programming language.  Let's keep it that way.  

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed




From soyouthinkimgonnalikethis at hotmail.com  Thu Jan  4 13:52:41 2007
From: soyouthinkimgonnalikethis at hotmail.com (Eric Price)
Date: Thu, 04 Jan 2007 13:52:41 -0500
Subject: what is this?
In-Reply-To: <504v40F1ebv3sU1@mid.individual.net>
Message-ID: <BAY108-F27583E39D4E087379B6E5DA0B80@phx.gbl>

>From: Paul Watson <pwatson at redlinepy.com>

>Probably most helpful to you is:
>
>http://developer.mozilla.org/es4/proposals/slice_syntax.html

Oh, the step. Okay, thanks ;)
Eric

_________________________________________________________________
Communicate instantly! Use your Hotmail address to sign into Windows Live 
Messenger now. http://get.live.com/messenger/overview



From theinvisable_man at yahoo.com  Fri Jan 19 03:59:47 2007
From: theinvisable_man at yahoo.com (JCH)
Date: Fri, 19 Jan 2007 08:59:47 GMT
Subject: ^*^*^^  Hot Smutty Videos ^*^*^
Message-ID: <7M%rh.686217$1T2.240423@pd7urf2no>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070119/f16da08f/attachment.html>

From pierre.imbaud at laposte.net  Fri Jan 12 11:42:30 2007
From: pierre.imbaud at laposte.net (Imbaud Pierre)
Date: Fri, 12 Jan 2007 17:42:30 +0100
Subject: module file
Message-ID: <45a7ba78$0$316$426a74cc@news.free.fr>

I am willing to retrieve the file an imported module came from;
module.__file__, or inspect.getfile(module) only gives me the
relative file name. How do I determine the path?
Its obviously possible from python: ipython displays the information
(interactively: *module?*).
Python 2.4 on Suse 9.3 (clueless, I guess)


From tony at PageDNA.com  Mon Jan  1 14:28:25 2007
From: tony at PageDNA.com (Tony Lownds)
Date: Mon, 1 Jan 2007 11:28:25 -0800
Subject: PEP 3107 Function Annotations for review and comment
In-Reply-To: <1167673695.249834.40100@a3g2000cwd.googlegroups.com>
References: <mailman.2136.1167434877.32031.python-list@python.org>
	<1167568000.728842.170160@48g2000cwx.googlegroups.com>
	<mailman.2176.1167579699.32031.python-list@python.org>
	<1167673695.249834.40100@a3g2000cwd.googlegroups.com>
Message-ID: <E3F0C6CC-C09E-4084-9C7C-3115C1BD5F37@PageDNA.com>


On Jan 1, 2007, at 9:48 AM, Kay Schluehr wrote:
> Good. There is still one issue. I understand that you don't want to  
> fix
> the semantics of function annotations but to be usefull some
> annotations are needed to express function types. Using those
> consistently with the notation of the enhanced function statement I
> suggest introducing an arrow expression and an __arrow__ special
> function:
>
> expr: arrow_expr ('->' arrow_expr)*
> arrow_expr: xor_expr ('|' xor_expr)*
>

I agree with the use case and I am in favor of this addition despite the
drawbacks below. While overloading __eq__ is a decent alternative,
the -> operator is so much nicer (IMO).

The precedence seems right:

Function(A) -> B | C    <=>  Function(A) -> (B | C)

Most operators special method names refer to the action or operation
rather that the symbol, eg __or__, not __vbar__. Also, since the  
token is
called RARROW, __arrow__ / __rarrow__ would be potentially easy to
mix up.

There might be opposition to adding an operator whose meaning in C
is very different. Also the operator as suggested does not have any  
meaning
on any built in objects, which is odd. We could add a meaning for  
ints/bools:

http://mathworld.wolfram.com/Implies.html

If that is reasonable I would suggest calling the special method  
__implies__
and putting the slot on PyNumberMethods. If that's just silly, I  
suggest calling
the special method __returns__.

We'll see what others say :) Thanks for the suggestion!

-Tony




From bearophileHUGS at lycos.com  Thu Jan 18 05:57:56 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 18 Jan 2007 02:57:56 -0800
Subject: A note on heapq module
In-Reply-To: <4Yidnf9NFKFm7jPYnZ2dnUVZ_u3inZ2d@comcast.com>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<slrneqs4vp.b4s.apardon@rcpc42.vub.ac.be>
	<4Yidnf9NFKFm7jPYnZ2dnUVZ_u3inZ2d@comcast.com>
Message-ID: <1169117876.063858.56570@s34g2000cwa.googlegroups.com>

Steven Bethard:
> Antoon Pardon:
> > For me, your class has the same drawback as the heappush, heappop
> > procedurers: no way to specify a comparision function.
>
> Agreed.  I'd love to see something like ``Heap(key=my_key_func)``.

It can be done, but the code becomes more complex and hairy:
http://rafb.net/p/iCCmDz16.html

(If someone spots a problem please tell me, thank you.)

Bye,
bearophile



From tiedon_jano at hotmail.com  Mon Jan  8 12:37:25 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Mon, 08 Jan 2007 17:37:25 GMT
Subject: Why less emphasis on private data?
In-Reply-To: <slrneq4nqc.k8.horpner@FIAD06.norwich.edu>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
	<%Isoh.22447$X97.12337@newsfe18.lga>
	<slrneq4nqc.k8.horpner@FIAD06.norwich.edu>
Message-ID: <pjvoh.192$cQ2.1@read3.inet.fi>

Neil Cerutti kirjoitti:
> On 2007-01-08, hg <hg at nospam.org> wrote:
>> sturlamolden wrote:
>>
>>> The designers of Java, C++, C#, Ada95, Delphi, etc. seem to think that
>>> if an object's 'internal' variables or states cannot be kept private,
>>> programmers get an irresistible temptation to mess with them in
>>> malicious ways. But if you are that stupid, should you be programming
>>> in any language? The most widely used language is still C, and there is
>>> no concept of private data in C either, nor is it needed.
>>
>> void test(void)
>> {
>>   static int i;
>> }
>>
>>
>> Do you agree that i is "private" to test ?
> 
> In C one uses the pointer to opaque struct idiom to hide data.
> For example, the standard FILE pointer.
> 

To surlamolden: I don't know how you define private, but if one defines 
in C an external static variable i.e. a variable outside any functions, 
on the file level, the scope of the variable is that file only.

To hg: One does not need in C the static keyword to make a variable 
defined inside a function i.e. a so called 'automatic variable' private 
to that test. Automatic variables are private to their function by 
definition. The static keyword makes the variable permanent i.e. it 
keeps its value between calls but it is of course private also.

To Neil Cerutti: If a programmer in C has got a pointer to some piece of 
memory, that piece is at the mercy of the programmer. There's no data 
hiding at all in this case.

To whom it may concern: please stop comparing C and Python with regard 
to privacy and safety. They are two different worlds altogether. Believe 
me: I've been in this world for 2.5 years now after spending 19 years in 
the C world.

Cheers,
Jussi


From justask at acme.com  Sat Jan 20 01:49:22 2007
From: justask at acme.com (Vincent Delporte)
Date: Sat, 20 Jan 2007 07:49:22 +0100
Subject: Code reformater?
Message-ID: <poe3r2ha92p6vrhtk9b2piso337djv4boo@4ax.com>

Hello

	When I copy/paste Python code from the web, every so often,
the TABs are wrong, which means that the code won't work and I have to
manually reformat the code.

Is there a code reformater that can parse the code to make it right?

Thanks.


From elrondrules at gmail.com  Tue Jan 30 14:07:39 2007
From: elrondrules at gmail.com (elrondrules at gmail.com)
Date: 30 Jan 2007 11:07:39 -0800
Subject: Convert raw data to XML
In-Reply-To: <mailman.3289.1170133211.32031.python-list@python.org>
References: <1170124927.718200.225080@m58g2000cwm.googlegroups.com>
	<mailman.3289.1170133211.32031.python-list@python.org>
Message-ID: <1170184059.739808.244660@s48g2000cws.googlegroups.com>

On Jan 29, 8:54 pm, "Gabriel Genellina" <gagsl... at yahoo.com.ar> wrote:
> En Mon, 29 Jan 2007 23:42:07 -0300, <elrondru... at gmail.com> escribi?:
>
> > For example the raw data is as follows
>
> > <?xml version="1.0" ?><Blah><ABC><Id id="1"/><Description>SomeText </
> > Description><Result>PassorFail</Result></ABC></Blah>
>
> > without spaces or new lines. I need this to be written into an XML
> > file as
> > [same content but nicely indented]
>
> Is the file supposed to be processed by humans? If not, just write it as  
> you receive it.
> Spaces and newlines and indentation are mostly irrelevant on an xml file.
>
> --
> Gabriel Genellina

the reason I wanted to write it as a file was to parse the file, look 
for a specific attribute and execute a set of commands based on the 
value of the attribute.. also i needed to display the output of the 
http post in a more readable format..




From smusnmrNOSPAM at yahoo.com  Thu Jan  4 03:13:22 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Thu, 4 Jan 2007 09:13:22 +0100
Subject: pow() works but sqrt() not!?
Message-ID: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>

Hi all,

this is a newbie question on :
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on
win32
PC with WinXP

In
http://www.python.org/doc/2.3.5/lib/module-math.html
I read:

"sqrt( x) Return the square root of x."

Now the test for module math with function pow():
---------------------------------------------------
>>> pow(9,9)
387420489

 Fine, but sqrt() fails:
-------------------
>>> sqrt(9)
I get this error message

'Traceback (most recent call last):
  File "<pyshell#3>", line 1, in <module>
    sqrt(9)
NameError: name 'sqrt' is not defined'

Same for sin() and cos(). ">>> Import math" does not help. Will I have to
define the sqrt() function first? If so, how?

Please help!

Thank you,

Siggi












From sturlamolden at yahoo.no  Thu Jan 11 07:02:17 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 11 Jan 2007 04:02:17 -0800
Subject: Parallel Python
In-Reply-To: <eo52h9$kad$1@news.albasani.net>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<7x8xga215f.fsf@ruckus.brouhaha.com>
	<eo3bjj$cen$1@gemini.csx.cam.ac.uk>
	<eo52h9$kad$1@news.albasani.net>
Message-ID: <1168516936.890690.235300@p59g2000hsd.googlegroups.com>


robert wrote:

> Thus communicated data is "serialized" - not directly used as with threads or with custom shared memory techniques like POSH object sharing.

Correct, and that is precisely why MPI code is a lot easier to write
and debug than thread code. The OP used a similar technique in his
'parallel python' project.

This does not mean that MPI is inherently slower than threads however,
as there are overhead associated with thread synchronization as well.
With 'shared memory' between threads, a lot more fine grained
synchronization ans scheduling is needed, which impair performance and
often introduce obscure bugs.



From arkanes at gmail.com  Thu Jan 18 10:14:56 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 18 Jan 2007 09:14:56 -0600
Subject: Catching wx events
In-Reply-To: <1169129536.879657.113130@v45g2000cwv.googlegroups.com>
References: <1169129536.879657.113130@v45g2000cwv.googlegroups.com>
Message-ID: <4866bea60701180714y14cb76b2p9b9b602acccc1bcb@mail.gmail.com>

On 18 Jan 2007 06:12:17 -0800, Cruelemort <ian.inglis at gmail.com> wrote:
> Hello all,
>
> I am new to this group (and new to Python) and was hoping someone would
> be able to help me with something, it is not so much a problem it is
> more of a general interest query about something i have a solution too
> but am not sure it is the correct one.
>
> I have a class that contains a string ID and a name, and a list
> containing a few objects of this type, i need to loop through this list
> and create a button for each object (with the name as the label) i have
> done this with the following code -
>
>                 for chan in self._channellist:
>                         channelbutton = wx.Button(self, id=-1,
> label=chan.getName())
>
> channelbutton.Bind(wx.EVT_BUTTON,self._channelChanged)
>
> My question is this - in the _channelChanged method, how do i know
> which button has been pressed when i enter the channel changed method,
> and so how do i retrieve the appropriate object depending on which
> button has been pressed?
>
> I have potentially solved this problem using the UserData property in a
> sizer, i have added all the buttons to a sizer for display purposes and
> so SizerItem objects have been created, i can then set the original
> object to the UserData object by putting the following line of code in
> the loop
>
>                         sizeritem =
> self.topsizer.Add(channelbutton,0,wx.ALIGN_RIGHT, userData=chan)
>
> This way i can retrieve the item in the _channelChanged method with the
> following -
>
>         def _channelChanged(self, event):
>                 eventobj = event.GetEventObject()
>                 chan = self.topsizer.GetItem(eventobj).GetUserData()
>
>
> This works fine but by looking at the API it would appear the UserData
> property is not really designed for this use ("userData - Allows an
> extra object to be attached to the sizer item, for use in derived
> classes when sizing information is more complex than the proportion and
> flag will allow for").
>
> Another option would be to derive my own Button class and include the
> object in there.
>
> Any advice on the best way to solve this problem would be appreciated.
>

Exactly how I would do it depends on the rest of the application. I
would probably derive my own button - never be afraid to subclass.

You could also generate the buttons IDs up front, and maintain a
mapping between the IDs and the channels, like so:

self.mapper = {}
for channel in self.channels:
    id = wx.NewId()
    self.mapper[id] = channel
    channelbutton = wx.Button(self, id=id, label=channel.getName())


def channelChanged(self, event):
    channel = self.mapper[event.Id]


You could also use closures (lambdas or via a factory function) to
bind the channel at the time you create the button:

for channel in self.channels:
    channelbutton = wx.Button(self, label=channel.getName())
    self.Bind(wx.EVT_BUTTON, lambda event:
self.channelChanged(channel), source=channelbutton)

def channelChanged(self, channel):
    print "Channel changed to ", channel.getName()


From tomerfiliba at gmail.com  Thu Jan 25 11:50:11 2007
From: tomerfiliba at gmail.com (gangesmaster)
Date: 25 Jan 2007 08:50:11 -0800
Subject: free variables /cell objects question
In-Reply-To: <pan.2007.01.25.14.51.22.464916@REMOVE.THIS.cybersource.com.au>
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com>
	<1169563580.634000.122540@v45g2000cwv.googlegroups.com>
	<mailman.3047.1169599631.32031.python-list@python.org>
	<1169725374.504546.153890@v33g2000cwv.googlegroups.com>
	<7xirevuw5s.fsf@ruckus.brouhaha.com>
	<pan.2007.01.25.14.51.22.464916@REMOVE.THIS.cybersource.com.au>
Message-ID: <1169743811.129419.80400@v45g2000cwv.googlegroups.com>

[Steven]
> My solution is, don't try to have one function do too much. Making a list
> of foos should be a separate operation from making a single foo:

that's exactly what my second example does (as well as my production
code)

[Paul]
> But it does work as expected, if your expectations are based on what
> closures actually do.

yet, i find what closures actually do, to be logically wrong.
moreover, it means the frame object must be kept alive for no reason...
or in my case, two frame objects per foo-function.

> The Python idiom is:
...
> def foo(n=n):

besides of being ugly, the def f(n=n) idiom is very bad,
programatically speaking. what if the user chooses to be a smartass
and call with n = 7? or what if the function's signature is
meaningful? (as it is in my case)

anyway, this talk is not going anywhere.
thanks for the info, and i'll see how i manage to optimize my code
from here.

-tomer

On Jan 25, 4:51 pm, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> On Thu, 25 Jan 2007 04:29:35 -0800, Paul Rubin wrote:
> > "gangesmaster" <tomerfil... at gmail.com> writes:
> >> what i see as a bug is this code not working as expected:
>
> >> >>> def make_foos(names):
> >> ...     funcs = []
> >> ...     for n in names:
> >> ...             def foo():
> >> ...                     print "my name is", n
> >> ...             funcs.append(foo)
> >> ...     return funcs
>
> > But it does work as expected, if your expectations are based on what
> > closures actually do.
>
> >> i have to create yet another closure, make_foo, so that the name
> >> is correctly bound to the object, rather than the frame's slot:
>
> > The Python idiom is:
>
> >    def make_foos(names):
> >        funcs = []
> >        for n in names:
> >                def foo(n=n):
> >                        print "my name is", n
> >                funcs.append(foo)
> >        return funcs
>
> > The n=n in the "def foo" creates the internal binding that you need.Hmmm... I thought that the introduction of nested scopes removed the need
> for that idiom. Its an ugly idiom, the less I see it the happier I am.
>
> And I worry that it will bite you on the backside if your "n=n" is a
> mutable value.
>
> My solution is, don't try to have one function do too much. Making a list
> of foos should be a separate operation from making a single foo:
>
> >>> def makefoo(name):...     def foo():
> ...             return "my name is " + name
> ...     return foo
> ...>>> makefoo("fred")()
> 'my name is fred'
> >>> def makefoos(names):...     foos = []
> ...     for name in names:
> ...             foos.append(makefoo(name))
> ...     return foos
> ...>>> L = makefoos(["fred", "wilma"])
> >>> L[0]()
> 'my name is fred'
> >>> L[1]()'my name is wilma'
>
> That makes it easier to do unit testing too: you can test your makefoo
> function independently of your makefoos function, if that's important.
>
> If you absolutely have to have everything in one function:
>
> >>> def makefoos(names):...     def makefoo(name):
> ...             def foo():
> ...                     return "my name is " + name
> ...             return foo
> ...     L = []
> ...     for name in names:
> ...             L.append(makefoo(name))
> ...     return L
> ...>>> L = makefoos(["betty", "barney"])
> >>> L[0]()
> 'my name is betty'
> >>> L[1]()'my name is barney'
>
> Best of all, now I don't have to argue as to which binding behaviour is
> more correct for closures!!! *wink*
> 
> --
> Steven.



From puttaramakrishna at gmail.com  Thu Jan 11 02:24:12 2007
From: puttaramakrishna at gmail.com (prk)
Date: 10 Jan 2007 23:24:12 -0800
Subject: Print message with Colors
Message-ID: <1168500252.143831.235250@i56g2000hsf.googlegroups.com>

Hi Folks,

Is there any procesure for print messages with colors.
Ex: print "Welcome"
Comment: Here i want to see the welcome message in Red Color.

Regards,
Ram



From codecraig at gmail.com  Mon Jan  8 13:10:23 2007
From: codecraig at gmail.com (abcd)
Date: 8 Jan 2007 10:10:23 -0800
Subject: More Efficient fnmatch.fnmatch for multiple patterns?
Message-ID: <1168279822.921033.267210@v33g2000cwv.googlegroups.com>

I am using fnmatch.fnmatch to find some files.  The only problem I have
is that it only takes one pattern...so if I want to search using
multiple patterns I have to do something like....

patterns = ['abc*.txt', 'foo*']

for p in patterns:
    if fnmatch.fnmatch(some_file_name, p):
        return True

...is there a built-in function that will match using multiple patterns?



From sebastien.thur at laposte.net  Wed Jan  3 08:24:10 2007
From: sebastien.thur at laposte.net (seb)
Date: 3 Jan 2007 05:24:10 -0800
Subject: convert frames from mpeg to array
Message-ID: <1167830650.673687.103330@v33g2000cwv.googlegroups.com>

Hi, I need to convert each frame from a movie (mpeg for example) to an
array (in order to do some computation)  and then back to a video
format mpeg for example. Do you know of any tools ?

The equipment :
------------------------
I got myself an IP axis camera with wich I am playing to trying to do
some shape recognition.
My PC is running winXP SP2.

The plan is :
------------------
1) to manage to record the movies to my hard disk (in mpeg format for
example)
2) to analyse the films in order to tests various algorythms /
computation
3) to generate the transformed frame back to mpeg (or any format).

What is already done is :
-------------------------------------
1) record to hard disk is easily donne using vlc for example
vlc "http://192.168.0.90/axis-cgi/mjpg/video.cgi?fps=30&nbrofframes=0"
--sout file/ts:test.mpg

The problem is point 2
---------------------------------
I have tried to use pygame (on winXP) but it seems that it does not
suppport movies.
Pycar does not run on my PC.
I have looked for some other tools but without any success.
There is possibily a python binding to vlc but I am not sure of what
can be done with it.


I thank you in advance for taking the time to read this mail.

Best regards.
Seb.



From pibizza at gmail.com  Sat Jan 13 09:34:19 2007
From: pibizza at gmail.com (PaoloB)
Date: 13 Jan 2007 06:34:19 -0800
Subject: Barcode recognition in Python
In-Reply-To: <87zm8n6ozr.fsf@gmail.com>
References: <1168676514.115592.181620@v45g2000cwv.googlegroups.com>
	<87zm8n6ozr.fsf@gmail.com>
Message-ID: <1168698859.441778.117650@51g2000cwl.googlegroups.com>


Jorge Godoy wrote:
> "PaoloB" <pibizza at gmail.com> writes:
>
> > Hi everyone,
> >
> > I am searching for a python library for barcode recognition. We have
> > developed a rather complex application for document tracking and
> > document management in python/Zope, called PAFlow (www.paflow.it:
> > sorry, most of the information is in Italian...).
> >
> > As our project is completely free software, we will need a library that
> > is free software too.
> >
> > Is there something like this in python ?
>
> Sorry, but what do you mean by "barcode recognition"?  A barcode reader
> already decodes the barcode and sends the decoded output.  If it is one
> plugged in a keyboard port, for example, reading the barcode or typing the
> "message" is exactly the same thing.
>
> Or are you willing some kind of OCR to process the barcodes without a barcode
> reader (why having barcodes then?)?
>


Hi Jorge,

basically we are trying to do exactly this. Our process works as
follows:

- an operator receives a paper document, compiles a series of data on a
computer form and produces a bar code stamp, that he puts on the
document.

- the document received during the day are put on a mass scanner. The
documents are sent to a specific e-mail address;

- the system reads the scanned documents, and based on the barcodes,
associate the documents to the information already present on the
system.

So, yes, we have to make OCR for barcodes.

Ciao

PaoloB



From Major27104 at aol.com  Thu Jan 18 19:35:04 2007
From: Major27104 at aol.com (Major27104 at aol.com)
Date: Thu, 18 Jan 2007 19:35:04 EST
Subject: Free Downloads, Wallpapers, Games, Eroticgames, Handy-Logos and much
	more
Message-ID: <c5f.c6fb289.32e16c38@aol.com>

 


From jeremit0 at gmail.com  Tue Jan 30 10:35:17 2007
From: jeremit0 at gmail.com (jeremito)
Date: 30 Jan 2007 07:35:17 -0800
Subject: Help me override append function of list object
Message-ID: <1170171317.866549.261060@a34g2000cwb.googlegroups.com>

I have created a class that inherits from the list object.  I want to 
override the append function to allow my class to append several 
copies at the same time with one function call.  I want to do 
something like:

import copy

class MyList(list):
  __init__(self):
    pass

  def append(self, object, n=1):
    for i in xrange(n):
        self.append(copy.copy(object))

Now I know this doesn't work because I overwrite append, but want the 
original functionality of the list object.  Can someone help me?

Thanks,
Jeremy



From ptmcg at austin.rr.com  Mon Jan 29 15:25:02 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 29 Jan 2007 12:25:02 -0800
Subject: List Behavior when inserting new items
In-Reply-To: <1170099535.989235.35800@a75g2000cwd.googlegroups.com>
References: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
	<1170099535.989235.35800@a75g2000cwd.googlegroups.com>
Message-ID: <1170102302.883700.87810@m58g2000cwm.googlegroups.com>

> py>    def __init__(self, arg = []):
> py>        self.__list = arg

Please don't perpetuate this bad habit!!!  "arg=[]" is evaluated at 
compile time, not runtime, and will give all default-inited llists the 
same underlying list.

The correct idiom is:

    def __init__(self, arg = None):
        if arg is not None:
            self.__list = arg
        else:
            self.__list = []

-- Paul



From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 19 06:13:45 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 19 Jan 2007 22:13:45 +1100
Subject: Traversing the properties of a Class
References: <1169141253.332211.12790@38g2000cwa.googlegroups.com>
	<slrneqvgtv.r0.horpner@FIAD06.norwich.edu>
Message-ID: <pan.2007.01.19.11.13.45.624604@REMOVE.THIS.cybersource.com.au>

On Thu, 18 Jan 2007 18:03:41 +0000, Neil Cerutti wrote:

> On 2007-01-18, EdG <edquichan at yahoo.com> wrote:
>> For debugging purposes, I would like to traverse the class
>> listing out all the properties.
> 
> This is the first thing that came to mind.
> 
> def show_properties(cls):
>   for attr in dir(cls):
>     if isinstance(getattr(cls, attr), property):
>       print attr

Funny. The first thing that came to my mind was, "Thank you for sharing.
Did you have a question?"

*wink*



-- 
Steven.



From deets at nospam.web.de  Tue Jan 30 04:38:04 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 30 Jan 2007 10:38:04 +0100
Subject: Help me understand this
References: <1170140737.027139.14920@h3g2000cwc.googlegroups.com>
	<pan.2007.01.30.07.47.33.15637@REMOVEME.cybersource.com.au>
	<1170146755.446429.90720@v45g2000cwv.googlegroups.com>
Message-ID: <528hvsF1lrmsgU1@mid.uni-berlin.de>

Beej wrote:

> On Jan 29, 11:47 pm, Steven D'Aprano
> <s... at REMOVEME.cybersource.com.au> wrote:
>> Outside of a print statement (and also an "except" statement), commas
>> create tuples.
> 
> And function calls:
> 
>>>> 3,
> (3,)
>>>> type(3,)
> <type 'int'>
>>>> type((3,))
> <type 'tuple'>
> 
> But here's one I still don't get:
> 
>>>> type(2)
> <type 'int'>
>>>> type((2))
> <type 'int'>
>>>> (2).__add__(1)
> 3
>>>> 2.__add__(1)
>   File "<stdin>", line 1
>     2.__add__(1)
>             ^
> SyntaxError: invalid syntax

Because 2. is the start of a float-literal. That isn't distinguishable for
the parsere otherwise.


Diez


From gagsl-py at yahoo.com.ar  Tue Jan 16 22:00:52 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 17 Jan 2007 00:00:52 -0300
Subject: How can i eval subindex on list[ ][ ] ?
In-Reply-To: <1168988937.512029.192800@q2g2000cwa.googlegroups.com>
References: <1168988937.512029.192800@q2g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070116235803.0466cb30@yahoo.com.ar>

At Tuesday 16/1/2007 20:08, jairodsl wrote:

>Excuse me, i was trying in too many ways but i couldnt access subindex
>on a list , the problem is the next:
>
>I have
>
>indif=[[0,'A'],[1,'B'],[2,'C'],[3,'D']]
>
>and
>
>indic=[[0,'B'],[1,'C'],[2,'D'],[3,'E']]
>
>i need to eval if indic[i][j] is equal to indif[i][j]
>
>I used a double for but i had got "list index out of range". How can i
>do ???

Posting your actual code would help. indif[i][j] should be fine, if i 
is between 0 and 3 inclusive, and j is 0 or 1.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From not at set.se  Tue Jan 23 16:27:26 2007
From: not at set.se (Daniel Jonsson)
Date: Tue, 23 Jan 2007 22:27:26 +0100
Subject: Noob Question: Force input to be int?
References: <1169546377.017596.43840@k78g2000cwa.googlegroups.com>
Message-ID: <ep5ujo$1bs$1@aioe.org>

Ah, thank you for the respone! 
I have not gotten around to test it yet, but I hope it will work! :)
-Daniel 

2007-01-23 10:59:37
wd.jonsson at gmail.com wrote in message
<1169546377.017596.43840 at k78g2000cwa.googlegroups.com>

> Hello everyone!
> I have a piece of code that looks like this:
> 
> if len(BuildList) > 0:
>     print "The script found %d game directories:" % len(BuildList)
>     print
>     num = 0
>     for i in BuildList:
>         print str(num) +"       " + i
>         num = num + 1
>     print
>     print "Select a build number from 0 to " + str(len(BuildList) - 
1)
>     buildNum = int(raw_input('Select build #> '))
> 
>     while buildNum > (len(BuildList) -1) or buildNum <= -1:
>         print
>         print "Error: Invalid build number!"
>         print "Select a build number from 0 to " + 
str(len(BuildList) -
> 1)
>         print
>         buildNum = int(raw_input('Select build: '))
> 
> The problem is with the while buildNum-loop. If the user enters a
> non-numeric value in the buildNum input, the scripts throws an
> exception. I need to constrict the user to ONLY use integers in the
> input box. How can I solve this issue?


From kbk at shore.net  Fri Jan 19 22:15:13 2007
From: kbk at shore.net (Kurt B. Kaiser)
Date: Fri, 19 Jan 2007 22:15:13 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200701200315.l0K3FD59009106@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  423 open ( +2) /  3539 closed ( +9) /  3962 total (+11)
Bugs    :  960 open ( -3) /  6446 closed (+20) /  7406 total (+17)
RFE     :  258 open ( +3) /   249 closed ( +3) /   507 total ( +6)

New / Reopened Patches
______________________

Add aliases for latin7/9/10 charsets  (2007-01-13)
       http://python.org/sf/1634778  opened by  Christoph Zwerschke

htonl et al accept negative ints  (2007-01-14)
CLOSED http://python.org/sf/1635058  opened by  Mark Roberts

Logging Module - followfile patch  (2006-11-17)
CLOSED http://python.org/sf/1598415  reopened by  cjschr

CSV DictWriter Errors  (2007-01-14)
       http://python.org/sf/1635454  opened by  Mark Roberts

strptime %F and %T directives  (2007-01-14)
CLOSED http://python.org/sf/1635473  opened by  Mark Roberts

File Read/Write Flushing Patch  (2007-01-16)
       http://python.org/sf/1636874  opened by  jurojin

urllib: change email.Utils -> email.utils  (2007-01-16)
       http://python.org/sf/1637157  opened by  Russell Owen

urllib2: email.Utils->email.utils  (2007-01-16)
       http://python.org/sf/1637159  opened by  Russell Owen

smtplib email renames  (2007-01-16)
       http://python.org/sf/1637162  opened by  Russell Owen

Add httponly to Cookie module  (2007-01-17)
       http://python.org/sf/1638033  opened by  Arvin Schnell

compiler.pycodegen causes crashes when compiling 'with'  (2007-01-17)
       http://python.org/sf/1638243  opened by  kirat

Fix to the long("123\0", 10) problem  (2007-01-18)
       http://python.org/sf/1638879  opened by  Calvin Spealman

email.utils.parsedate documentation  (2007-01-19)
       http://python.org/sf/1639973  opened by  Mark Roberts

Patches Closed
______________

platform.py support for IronPython  (2006-09-23)
       http://python.org/sf/1563842  closed by  lemburg

Small upgrades to platform.platform()  (2005-11-10)
       http://python.org/sf/1352731  closed by  lemburg

pybench support for IronPython  (2006-09-23)
       http://python.org/sf/1563844  closed by  lemburg

Py3k: Fix pybench so it runs  (2007-01-12)
       http://python.org/sf/1634499  closed by  gvanrossum

Bug fixes for int unification branch  (2006-12-20)
       http://python.org/sf/1619846  closed by  gvanrossum

htonl et al accept negative ints  (2007-01-14)
       http://python.org/sf/1635058  closed by  gvanrossum

Logging Module - followfile patch  (2006-11-17)
       http://python.org/sf/1598415  closed by  vsajip

strptime %F and %T directives  (2007-01-14)
       http://python.org/sf/1635473  closed by  bcannon

BSD version of ctypes.util.find_library   (2006-12-07)
       http://python.org/sf/1610795  closed by  theller

New / Reopened Bugs
___________________

Problem running a subprocess  (2007-01-13)
       http://python.org/sf/1634739  opened by  Florent Rougon

locale 1251 does not convert to upper case properly  (2007-01-13)
       http://python.org/sf/1634774  opened by  Ivan Dobrokotov

Little mistake in docs  (2007-01-14)
       http://python.org/sf/1635217  opened by  anatoly techtonik

Add registry functions to windows postinstall  (2007-01-14)
       http://python.org/sf/1635335  opened by  anatoly techtonik

expanduser tests in test_posixpath fail if $HOME ends in a /  (2007-01-14)
CLOSED http://python.org/sf/1635353  opened by  Marien Zwart

Add command line help to windows unistall binary  (2007-01-14)
       http://python.org/sf/1635363  opened by  anatoly techtonik

ConfigParser does not quote %  (2007-01-15)
       http://python.org/sf/1635639  opened by  Mark Roberts

Interpreter seems to leak references after finalization  (2007-01-15)
       http://python.org/sf/1635741  opened by  B Sizer

description of the beta distribution is incorrect  (2007-01-15)
CLOSED http://python.org/sf/1635892  opened by  elgordo

Newline skipped in "for line in file"  (2007-01-16)
       http://python.org/sf/1636950  opened by  Andy Monthei

Python-2.5 segfault with tktreectrl  (2007-01-16)
CLOSED http://python.org/sf/1637022  opened by  klappnase

Python 2.5 fails to build on AIX 5.3 (xlc_r compiler)  (2007-01-16)
       http://python.org/sf/1637120  opened by  Orlando Irrazabal

mailbox.py uses old email names  (2007-01-16)
       http://python.org/sf/1637167  opened by  Russell Owen

make_table in difflib does not work with unicode  (2007-01-18)
       http://python.org/sf/1637850  opened by  y-unno

Problem packaging wx application with py2exe.  (2007-01-17)
CLOSED http://python.org/sf/1637943  opened by  Indy

typo    http://www.python.org/doc/current/tut/node10.html  (2007-01-17)
CLOSED http://python.org/sf/1637952  opened by  jim pruett

langref: missing item in numeric op list  (2007-01-17)
CLOSED http://python.org/sf/1637967  opened by  paul rubin

Incorrect documentation for random.betavariate()  (2007-01-18)
CLOSED http://python.org/sf/1638627  opened by  Troels Walsted Hansen

Bugs Closed
___________

class derived from float evaporates under +=  (2007-01-11)
       http://python.org/sf/1633630  closed by  gbrandl

file.encoding doesn't apply to file.write  (2004-06-07)
       http://python.org/sf/967986  closed by  lemburg

platform.libc_ver() fails on Cygwin  (2004-04-02)
       http://python.org/sf/928297  closed by  lemburg

subprocess swallows empty arguments under win32  (2007-01-12)
       http://python.org/sf/1634343  closed by  astrand

htonl, ntohl don't handle negative longs  (2006-12-20)
       http://python.org/sf/1619659  closed by  gvanrossum

expanduser tests in test_posixpath fail if $HOME ends in a /  (2007-01-14)
       http://python.org/sf/1635353  closed by  marienz

time.strftime() accepts format which time.strptime doesnt  (2007-01-11)
       http://python.org/sf/1633628  closed by  bcannon

SaveConfigParser.write() doesn't quote %-Sign  (2006-11-27)
       http://python.org/sf/1603688  closed by  gbrandl

logging module / wrong bytecode?  (2007-01-11)
       http://python.org/sf/1633605  closed by  vsajip

description of the beta distribution is incorrect  (2007-01-15)
       http://python.org/sf/1635892  closed by  rhettinger

os.path.expandvars deletes things on w32  (2001-12-18)
       http://python.org/sf/494589  closed by  sjoerd

Python-2.5 segfault with tktreectrl  (2007-01-16)
       http://python.org/sf/1637022  closed by  loewis

Problem packaging wx application with py2exe.  (2007-01-17)
       http://python.org/sf/1637943  closed by  bcannon

typo    http://www.python.org/doc/current/tut/node10.html  (2007-01-17)
       http://python.org/sf/1637952  closed by  gbrandl

langref: missing item in numeric op list  (2007-01-17)
       http://python.org/sf/1637967  closed by  gbrandl

Incorrect type in PyDict_Next() example code  (2007-01-05)
       http://python.org/sf/1629125  closed by  gbrandl

website issue reporter down  (2007-01-03)
       http://python.org/sf/1627036  closed by  gbrandl

Incorrect documentation for random.betavariate()  (2007-01-18)
       http://python.org/sf/1638627  closed by  loewis

Garbage output to file of specific size  (2007-01-08)
       http://python.org/sf/1630894  deleted by  mculbert

Forwarding events and Tk.mainloop problem  (2006-05-05)
       http://python.org/sf/1482402  closed by  loewis

New / Reopened RFE
__________________

csv.DictWriter: Include offending name in error message  (2007-01-13)
       http://python.org/sf/1634717  opened by  Gabriel Genellina

Please provide rsync-method in the urllib[2] module  (2007-01-13)
       http://python.org/sf/1634770  opened by  Matthias Klose

if __name__=='__main__' missing in tutorial  (2007-01-17)
       http://python.org/sf/1637365  opened by  Gabriel Genellina

Empty class 'Object'  (2007-01-17)
       http://python.org/sf/1637926  opened by  kxroberto

add type defintion support  (2007-01-18)
CLOSED http://python.org/sf/1639002  opened by  djnet

RFE Closed
__________

logging.RotatingFileHandler has no "infinite" backupCount  (2006-09-28)
       http://python.org/sf/1567331  closed by  vsajip

Print full exceptions as they occur in logging  (2006-09-06)
       http://python.org/sf/1553380  closed by  vsajip

add type defintion support  (2007-01-18)
       http://python.org/sf/1639002  closed by  gbrandl



From webraviteja at gmail.com  Sat Jan 27 11:17:32 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 27 Jan 2007 08:17:32 -0800
Subject: Hi, I'm new to python
In-Reply-To: <1169905027.776723.194140@a75g2000cwd.googlegroups.com>
References: <1169905027.776723.194140@a75g2000cwd.googlegroups.com>
Message-ID: <1169914652.807494.200330@a34g2000cwb.googlegroups.com>



On Jan 27, 5:37 am, millbal... at yahoo.com wrote:
> Hey Everyone
>
> Let me tell you all a little bit about my programming background so
> you can get an idea of my capability, or lack of, dealing with p.l;
> so far i've learned some visual basic when i was doing my a-levels....
> and thats about it lol.
>
> Basically i like the sound of python and its ease of use and would
> like to know in depth more about it and its range of useage.  Please
> do tell me all you know, keeping in mind i am a n00b, so do be
> gentle. :)
>
> Thanks
> Millball54

Start Here
http://www.python.org/doc/
There is a ton of documentation tailored to learners with differing 
skills.

You might also want to pick up a book on Python.

Be sure to read the docs, use Google, search this group for similar 
questions in the past before you post questions. They are great 
resources. If you have very basic questions, IRC (freenode has a 
Python channel), is a better option. When you post, make the question 
as specific as possible. Sometimes typing a good question itself gives 
you an answer.

Ravi Teja.



From steve at REMOVE.THIS.cybersource.com.au  Mon Jan  8 05:37:55 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 08 Jan 2007 21:37:55 +1100
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
	<pan.2007.01.07.22.10.37.701405@REMOVE.THIS.cybersource.com.au>
	<7xlkke19he.fsf@ruckus.brouhaha.com>
	<pan.2007.01.08.07.28.02.494235@REMOVEME.cybersource.com.au>
	<7xirfiyn3y.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.01.08.10.37.54.614464@REMOVE.THIS.cybersource.com.au>

On Sun, 07 Jan 2007 23:49:21 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
>> Just how often do you inherit from two identically-named classes
>> both of which use identically-named private attributes?
> 
> I have no idea how often if ever.

You've established that there's a name conflict when you do so, which
leads to bugs. So how often do you get bitten by that particular type of
bug?


> I inherit from library classes all
> the time, without trying to examine what superclasses they use.  If my
> subclass happens to have the same name as a superclass of some library
> class (say Tkinter) this could happen.  Whether it ever DOES happen, I
> don't know, I could only find out by examining the implementation
> details of every library class I ever use, and I could only prevent it
> by remembering those details.

class MySubClass(SomeSuperclass):
    try:
        __my_private_attribute
    except AttributeError:
        __my_private_attribute = some_value
    else:
        raise ValueError("Name conflict with private attribute!")

Problem solved.

*wink*


> That is an abstraction leak and is
> dangerous and unnecessary.  The name mangling scheme is a crock.  How
> often does anyone ever have a good reason for using it, 

Exactly. I never use it.

The truth of the matter is, MyClass.__private is not private at all. It is
still a public attribute with a slightly unexpected name. In other words,
if you want to code defensively, you should simply assume that Python has
no private attributes, and code accordingly.

Problem solved.



-- 
Steven.



From apardon at forel.vub.ac.be  Wed Jan 17 07:18:01 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 17 Jan 2007 12:18:01 GMT
Subject: A note on heapq module
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
Message-ID: <slrneqs4vp.b4s.apardon@rcpc42.vub.ac.be>

On 2007-01-16, bearophileHUGS at lycos.com <bearophileHUGS at lycos.com> wrote:
> In few minutes I have just written this quite raw class, it lacks
> doctring (the same of the functions of the heapq module), it may
> contain bugs still, I haven't tested it much. It's just a simple
> wrapper around some of the functions of the heapq module (nsmallest and
> nlargest are missing). Usually I use classes only when I need then, I
> like functional programming enough, and this class seems to just slow
> down the functions of the heapq module. But I think an improved class
> similar to this one may be useful (added, replacing isn't necessary)
> into the heapq module, because it can avoid cetain errors: I know what
> Heaps are and how they work, but some time ago I have written a bug
> into small program that uses the functions of the heapq module, because
> I have added an item to the head of the heap using a normal list
> method, breaking the heap invariant. With a simple class like this one
> all the methods of your object keep the heap invariant, avoiding that
> kind of bugs. (If you are interested I can improve this class some,
> it't not difficult.)
>
> [ Heap class based on heapq ]

For me, your class has the same drawback as the heappush, heappop
procedurers: no way to specify a comparision function. Somewhere
in my experimental code I work with line segments in two dimensions.
Now in one place I want from the available segments the one in which the
first point is farthest to the left. In a second place I want from the
available segments the one in which the second point is farthest to the
left. Both can be done with a heap, but currently I can't get both
behaviours while using the same class and using the heapq module or
your Heap class.

-- 
Antoon Pardon


From paroutyj at gdls.com  Fri Jan 26 13:41:36 2007
From: paroutyj at gdls.com (paroutyj at gdls.com)
Date: Fri, 26 Jan 2007 13:41:36 -0500
Subject: Problem embedding the Python interpreter and importing win32
	extensions
Message-ID: <OF3B0F680E.702A5F55-ON8525726F.0065766F-8525726F.0066AF6D@is002023.gdls.com>

I have been playing around with this issue for a while and seen some 
previous posting trying to address the problem but I haven't seen any 
answers to the problem so I am reposting it in my quest for a solution. 

I am using python 2.2.3, because I am using some dSpace software 
(controldesk/automationdesk) that is based upon that version of python. I 
have some pre-compiled python modules that come with the dspace 
applications. I am pretty sure that those modules use win32com or 
pythoncom. I want to use those modules from a C/C++ application or DLL via 
an embedded interpreter. I can make it work, but it only works once. I get 
an error trying to import those modules again, even after uninitializing 
the interpreter (Py_Initialize) and re-initializing it (Py_Uninitialize). 
I thought may be using a new sub-interpreter would help but it doesn't so 
now I have no idea what I could try. Any ideas?


This is an e-mail from General Dynamics Land Systems. It is for the intended recipient only and may contain confidential and privileged information.  No one else may read, print, store, copy, forward or act in reliance on it or its attachments.  If you are not the intended recipient, please return this message to the sender and delete the message and any attachments from your computer. Your cooperation is appreciated.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070126/49d51aec/attachment.html>

From nyenyec at gmail.com  Sun Jan  7 14:23:20 2007
From: nyenyec at gmail.com (nyenyec)
Date: 7 Jan 2007 11:23:20 -0800
Subject: urlib.quote gives KeyError in Python 2.4.4 but workin 2.3.5
In-Reply-To: <1168195697.483795.71160@38g2000cwa.googlegroups.com>
References: <1168195697.483795.71160@38g2000cwa.googlegroups.com>
Message-ID: <1168197800.107994.143170@51g2000cwl.googlegroups.com>

encode seems to solve my problem:

>>> urllib.quote(u'\xe9'.encode('utf-8'))
'%C3%A9'

Cheers,
nyenyec

nyenyec wrote:
> urllib.quote chokes on unicode in 2.4.4.
>
> >>> print sys.version
> 2.4.4 (#1, Oct 18 2006, 10:34:39)
> [GCC 4.0.1 (Apple Computer, Inc. build 5341)]
> >>> urllib.quote(u"\xe9")
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4//lib/python2.4/urllib.py",
> line 1117, in quote
>     res = map(safe_map.__getitem__, s)
> KeyError: u'\xe9'
>
> but it seems to work in Python 2.3.5
>
> Python 2.3.5 (#1, Aug 19 2006, 21:31:42)
> [GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import sys, urllib
> >>> print sys.version
> 2.3.5 (#1, Aug 19 2006, 21:31:42)
> [GCC 4.0.1 (Apple Computer, Inc. build 5363)]
> >>> urllib.quote(u'\xe9')
> '%E9'
>
> Is this a known bug?
> 
> What's the workaround?
> 
> Thanks,
> nyenyec



From paddy3118 at netscape.net  Tue Jan  9 02:10:36 2007
From: paddy3118 at netscape.net (Paddy)
Date: 8 Jan 2007 23:10:36 -0800
Subject: re.sub and re.MULTILINE
In-Reply-To: <1168316266.374186.271310@42g2000cwt.googlegroups.com>
References: <1168316266.374186.271310@42g2000cwt.googlegroups.com>
Message-ID: <1168326636.436910.165360@v33g2000cwv.googlegroups.com>


nyenyec wrote:

> I feel like a complete idiot but I can't figure out why re.sub won't
> match multiline strings:
>
> This works:
> >>> re.search("^foo", "\nfoo", re.MULTILINE)
> <_sre.SRE_Match object at 0x6c448>
>
> This doesn't. No replacement:
> >>> re.sub("^foo", "bar", "\nfoo", re.MULTILINE)
> '\nfoo'
>
> Why?
>
> Thanks,
> nyenyec

Check the arguments to re.sub.

>>> re.sub('(?m)^foo', 'bar', '\nfoo', count=0)
'\nbar'


- Paddy.



From pavlovevidence at gmail.com  Tue Jan 16 02:11:26 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 15 Jan 2007 23:11:26 -0800
Subject: assert versus print [was Re: The curious behavior of integer
	objects]
In-Reply-To: <mailman.2762.1168916788.32031.python-list@python.org>
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
	<mailman.2744.1168901460.32031.python-list@python.org>
	<pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>
	<76fd5acf0701151838l1a724be5n3f1e1fda629d1464@mail.gmail.com>
	<mailman.2762.1168916788.32031.python-list@python.org>
Message-ID: <1168931486.610893.250040@38g2000cwa.googlegroups.com>

Ron Adam wrote:
> There have been times where I would like assert to be a little more assertive
> than it is.  :-)
>
> ie.. not being able to turn them off with the -0/-00 switches, and having them
> generate a more verbose traceback.

Personally, I'd rather see it get less assertive, i.e., having it only
work in a special debugging mode.  That way people who haven't RTFM
don't use it to make sure their input is correct.


Carl Banks



From AleydisGP at gmail.com  Mon Jan  8 06:34:12 2007
From: AleydisGP at gmail.com (AleydisGP at gmail.com)
Date: 8 Jan 2007 03:34:12 -0800
Subject: Working with Excel inside Python
In-Reply-To: <x0hoh.8631$w91.5334@newsread1.news.pas.earthlink.net>
References: <1168205727.130771.257030@51g2000cwl.googlegroups.com>
	<LHeoh.407$uL1.363@newsfe22.lga>
	<1168218370.688414.171150@s80g2000cwa.googlegroups.com>
	<x0hoh.8631$w91.5334@newsread1.news.pas.earthlink.net>
Message-ID: <1168256052.090472.54890@s80g2000cwa.googlegroups.com>

Sorry for my little knowledge on Python. Actually my knowledge is
specific for automating geo-processing tasks within ESRI environment,
but sometimes I need to automate some other tasks (like this one) which
require more in-depth knowledge of this language.
Lots of documentation are of no use when you don't know exactly what to
look for or have a wrong idea of what to do.
Thanks for the guidance.

On 8 ene, 02:21, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On 7 Jan 2007 17:06:10 -0800, "John Machin" <sjmac... at lexicon.net>
> declaimed the following in comp.lang.python:
>
> > However I don't understand how a reasonable solution to the OP's
> > requirement (translate a tab-separated file to a DBF file with a bit of
> > slicing and dicing on the way) would have anything to do with .xls
> > files, or  Excel, or VB ...        Only in that the original poster stated they were trying to
> translate an Excel VBA "macro" into Python, and the malformed (for
> Python) code appeared to be using Window's COM access to run all the
> work via Excel (I presume via importing the TSV, performing the edits,
> then exporting via some DBF compatible format -- ODBC?).
>
>         I'd agree, however, that the specification of the task to be
> performed does not, it would seem, require any of the clumsiness of
> using Excel. Read the lines of the TSV file using proper specifications
> to the Python CSV file handling module, edit the lines as needed, and
> write them via an ODBC (or other) database adapter that generates the
> desired DBF format...
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com             wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/



From tiedon_jano at hotmail.com  Thu Jan 18 07:12:44 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Thu, 18 Jan 2007 12:12:44 GMT
Subject: One more regular expressions question
In-Reply-To: <1169121609.571152.214850@11g2000cwr.googlegroups.com>
References: <1169113767.320500.71200@11g2000cwr.googlegroups.com>
	<1169120317.437211.73660@m58g2000cwm.googlegroups.com>
	<1169121609.571152.214850@11g2000cwr.googlegroups.com>
Message-ID: <0vJrh.74$6H1.13@read3.inet.fi>

Victor Polukcht kirjoitti:
> Great thanks.
> 
> You post helped me so much!
> 
> My resulting regexp is:
> "(?P<var1>^(.*)\s*)\(((?P<var2>\d+))\)\s+((?P<var3>\d+))"
> 

If it doesn't have to be a regex:

#===================================================
s = '''\
Unassigned Number (1)                                    32
No Route To Destination (3)                              12
Normal call clearing (16)                                   2654
User busy (17)                                                 630
No user respond (18)                                        5
User alerting no answer (19)                             16
Call rejected (21)                                             3
Destination out of order (27)                             1
Invalid number format (28)                                32
Normal unspecified (31)                                   32
No channel available (34)                                 2
Temporary failure (41)                                      11
Switching equipment congestion (42)                4
Resource unavailable unspecified (47)               2
Bearer capability not authorized (57)                 73
Incomp. dest. / Non-existent CUG (88)              1
Recovery on timer expiry (102)                          2
Interworking, unspecified (127)                          5
'''

for row in s.split('\n')[:-1]:
     var1, var2 = row.split('(')
     var2, var3 = var2.split()
     var2 = var2[:-1]
     print var2, var3, var1
#===================================================

Cheers,
Jussi


From http  Thu Jan 18 18:59:53 2007
From: http (Paul Rubin)
Date: 18 Jan 2007 15:59:53 -0800
Subject: A note on heapq module
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<slrneqs4vp.b4s.apardon@rcpc42.vub.ac.be>
	<4Yidnf9NFKFm7jPYnZ2dnUVZ_u3inZ2d@comcast.com>
	<1169117876.063858.56570@s34g2000cwa.googlegroups.com>
	<8NSdnf38_otYcjLYnZ2dnUVZ_tadnZ2d@comcast.com>
	<1169159235.864192.263210@v45g2000cwv.googlegroups.com>
	<CaGdnRMfscMmmC3YnZ2dnUVZ_vamnZ2d@comcast.com>
Message-ID: <7xk5zjyjgm.fsf@ruckus.brouhaha.com>

Steven Bethard <steven.bethard at gmail.com> writes:
>      Heap(sequence=None, inplace=False)
>      KeyedHeap(key, sequence=None)
> Of course, this approach ends up with a bunch of code duplication again.

Maybe there's a way to use a metaclass that can make either type of
heap but they'd share most methods.


From rdiaz02 at gmail.com  Sun Jan 21 18:13:03 2007
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Mon, 22 Jan 2007 00:13:03 +0100
Subject: Py 2.5 on Language Shootout
In-Reply-To: <1169331552.918850.282920@a75g2000cwd.googlegroups.com>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>
	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>
	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>
	<1169275613.093797.67320@v45g2000cwv.googlegroups.com>
	<45B23400.2010906@gmx.de>
	<mailman.2944.1169309208.32031.python-list@python.org>
	<1169321686.025356.120340@s34g2000cwa.googlegroups.com>
	<mailman.2951.1169329048.32031.python-list@python.org>
	<1169331552.918850.282920@a75g2000cwd.googlegroups.com>
Message-ID: <624934630701211513t3a3e28a5ua7387c9ee2f5790e@mail.gmail.com>

On 20 Jan 2007 14:19:12 -0800, Isaac Gouy <igouy at yahoo.com> wrote:
>
> Ramon Diaz-Uriarte wrote:
> > On 20 Jan 2007 11:34:46 -0800, Isaac Gouy <igouy at yahoo.com> wrote:

(...)

> > >
> > > And that's why the existence of CINT is such a stark reminder of the
> > > separation between the language and the implementation. When people
> > > think of C what do they think of - gcc? tiny-c? intel c? microsoft c?
> > > some mythical C implementation?
> > >
> > >
> >
> > Really, this ain't my war. Sure, there are two things: the language
> > and the implementation. But, for practical purposes, when most people
> > today say Python they mean CPython, whereas if the say Scheme, they
> > certainly need to say _which_ Scheme (I think only PLT is in the
> > official shootout page; there are others in the beta tests). If people
> > want to mean Jython or Stackless, they just say that. As for C, I
> > think people will need to qualify what exactly they mean.
> >
> > I think all these issues do not really lead to confusion for most of
> > us; certainly not if you go to the shootout page. But as I said, this
> > ain't my war. I was simply pointing out that correcting one poster for
> > talking about languages when referring to python was hair splitting.
> >
> > And I think we are all running in circles, because I guess we all
> > agree. This is turning into what in Spain (a country of catholic
> > tradition) we call a discussion about "the sex of the angels" (el sexo
> > de los angeles), i.e., whether angels are male or female or something
> > else. Since sexing angels is not my area of expertise, I'll just shut
> > up (I actually don't really know why I even said anything about this
> > issue; please, forgive my chatiness).
>
>
> In England the corresponding expression is "Counting Angels on a
> Pinhead"
> http://dannyayers.com/2001/misc/angels.htm
>

Thanks, that is neat. I find the discussion on the sex of the angels,
well, sexier. But we are probably a few hundred years late to start a
catholic-protestant religious war here :-).


R.

> >
> > Best,
> >
> > R.
> >
> >
> > > >
> > > > I think readers understood the previous poster.
> > > >
> > > > Best,
> > > >
> > > > R.
> > > > >
> > > > > Cheers,
> > > > >
> > > > > Carl Friedrich Bolz
> > > > >
> > > > > --
> > > > > http://mail.python.org/mailman/listinfo/python-list
> > > > >
> > > >
> > > >
> > > > --
> > > > Ramon Diaz-Uriarte
> > > > Statistical Computing Team
> > > > Structural Biology and Biocomputing Programme
> > > > Spanish National Cancer Centre (CNIO)
> > > > http://ligarto.org/rdiaz
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > >
> >
> >
> > --
> > Ramon Diaz-Uriarte
> > Statistical Computing Team
> > Structural Biology and Biocomputing Programme
> > Spanish National Cancer Centre (CNIO)
> > http://ligarto.org/rdiaz
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Ramon Diaz-Uriarte
Statistical Computing Team
Structural Biology and Biocomputing Programme
Spanish National Cancer Centre (CNIO)
http://ligarto.org/rdiaz


From zion at ee.oulu.fi  Sun Jan 28 21:12:55 2007
From: zion at ee.oulu.fi (Simo Hosio)
Date: Mon, 29 Jan 2007 04:12:55 +0200 (EET)
Subject: problems with pyzeroconf and linux
In-Reply-To: <45bb6d30$0$49196$14726298@news.sunsite.dk>
References: <mailman.3184.1169794676.32031.python-list@python.org>
	<45bb6d30$0$49196$14726298@news.sunsite.dk>
Message-ID: <Pine.GSO.4.61.0701290406190.22447@tk1>


On Sat, 27 Jan 2007, Damjan wrote:

>
>> I am trying to get pyzeroconf (http://sourceforge.net/projects/pyzeroconf)
>> running on my machine but having trouble... Running the Zeroconf.py file
>> seems to register the service, but is unable to find it.
>
> You should be running avahi.. it also comes python support.
>
> Here's an example that registers a CNAME that points to your hostname (that
> avahi itself publishes)
>
> #! /usr/bin/env python
> import avahi, dbus
> from encodings.idna import ToASCII
>
> # Got these from /usr/include/avahi-common/defs.h
> CLASS_IN = 0x01
> TYPE_CNAME = 0x05
>
> TTL = 60
>
> def publish_cname(cname):
>    bus = dbus.SystemBus()
>    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
> avahi.DBUS_PATH_SERVER),
>            avahi.DBUS_INTERFACE_SERVER)
>    group = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
> server.EntryGroupNew()),
>            avahi.DBUS_INTERFACE_ENTRY_GROUP)
>
>    rdata = createRR(server.GetHostNameFqdn())
>    cname = encode_dns(cname)
>
>    group.AddRecord(avahi.IF_UNSPEC, avahi.PROTO_UNSPEC, dbus.UInt32(0),
>        cname, CLASS_IN, TYPE_CNAME, TTL, rdata)
>    group.Commit()
>
>
> def encode_dns(name):
>    out = []
>    for part in name.split('.'):
>        if len(part) == 0: continue
>        out.append(ToASCII(part))
>    return '.'.join(out)
>
> def createRR(name):
>    out = []
>    for part in name.split('.'):
>        if len(part) == 0: continue
>        out.append(chr(len(part)))
>        out.append(ToASCII(part))
>    out.append('\0')
>    return ''.join(out)
>
> if __name__ == '__main__':
>    import time, sys, locale
>    for each in sys.argv[1:]:
>        name = unicode(each, locale.getpreferredencoding())
>        publish_cname(name)
>    try:
>        while 1: time.sleep(60)
>    except KeyboardInterrupt:
>        print "Exiting"
>
>
> -- 
> damjan

Hi,
I actually tried Avahi also at first, but was having a lot of difficulties 
setting it up to my actual target environment (Maemo platform, based on 
Debian, and used on Nokia 770&N800 devices...).

Probably this is anyhow an issue of Debian network configuration, so maybe 
I'll ask the lists there also.

I will later utilize Avahi, if possible, so thanks for the code snippet. :) 
And if anyone knows what might be the propblem with Pyzeroconf and my dear 
Ubuntu, please tell me.

Br,
Simo


From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 26 19:45:03 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 27 Jan 2007 11:45:03 +1100
Subject: assertions to validate function parameters
References: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
	<pan.2007.01.26.04.26.09.242968@REMOVE.THIS.cybersource.com.au>
	<uCB*uiPBr@news.chiark.greenend.org.uk>
Message-ID: <pan.2007.01.27.00.45.03.312348@REMOVE.THIS.cybersource.com.au>

On Fri, 26 Jan 2007 18:28:32 +0000, Matthew Woodcraft wrote:

> I have a question for you. Consider this function:
> 
> def f(n):
>     """Return the largest natural power of 2 which does not exceed n."""
>     if n < 1:
>         raise ValueError
>     i = 1
>     while i <= n:
>         j = i
>         i *= 2
>     return j
> 
> If I pass it an instance of MyNumericClass, it will return an int or a
> long, not an instance of MyNumericClass.
> 
> In your view, is this a weakness of the implementation? Should the
> author of the function make an effort to have it return a value of the
> same type that it was passed?

Only if it makes sense in the context of the function. I'd say it
depends on the principle of "least surprise": if the caller would expect
that passing in a MyNumericClass or a float or a Rational should return
the same type, then Yes, otherwise its optional.

Numeric functions are probably the least convincing example of this,
because in general people expect numeric functions to coerce arguments in
not-always-intuitive ways, especially when they pass multiple arguments
of mixed types. What should g(MyNumericClass, int, float, Rational)
return? And it often doesn't matter, not if you're just doing arithmetic,
because (in principle) any numeric type is compatible with any other
numeric type.

The principle of least surprise is sometimes hard to follow because it
means putting yourself in the shoes of random callers. Who knows what they
expect? One rule of thumb I use is to consider the function I'm writing,
and its relationship to the argument. Would I consider that the result is
somehow _made_from_ the argument? If so, then I should return the same
type (unless there is a compelling reason not to).

I'm NOT talking about implementation here, I'm thinking abstract
functions. Whether your implementation actually transforms the initial
argument, or creates a new piece of data from scratch, is irrelevant.

In your above example, the result isn't "made from" the argument (although
some implementations, using log, might do so). In abstract, the result is
an integer that is chosen by comparison to the argument, not by
construction from the argument. So it is unimportant for it to be the same
type, and in fact the caller might expect that the result is an int no
matter what argument he passes.


-- 
Steven.



From bdesth.quelquechose at free.quelquepart.fr  Tue Jan  2 11:01:28 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 02 Jan 2007 17:01:28 +0100
Subject: Can I beat perl at grep-like processing speed?
In-Reply-To: <mailman.2124.1167404439.32031.python-list@python.org>
References: <mailman.2124.1167404439.32031.python-list@python.org>
Message-ID: <459a7bbe$0$693$426a74cc@news.free.fr>

js a ?crit :
> Just my curiosity.
> Can python beats perl at speed of grep-like processing?

Probably not.

> 
> $ wget http://www.gutenberg.org/files/7999/7999-h.zip
> $ unzip 7999-h.zip
> $ cd 7999-h
> $ cat *.htm > bigfile
> $ du -h bigfile
> du -h bigfile
> 8.2M    bigfile
> 
> ---------- grep.pl ----------
> #!/usr/local/bin/perl
> open(F, 'bigfile') or die;
> 
> while(<F>) {
>  s/[\n\r]+$//;
>  print "$_\n" if m/destroy/oi;
> }
> ---------- END ----------
> ---------- grep.py ----------
> #!/usr/bin/env python
> import re
> r = re.compile(r'destroy', re.IGNORECASE)
> 
> for s in file('bigfile'):
>  if r.search(s): print s.rstrip("\r\n")
> ---------- END ----------

Please notice that you're also benchmarking IO here - and perl seems to 
use a custom, highly optimized IO lib, that is much much faster than the 
system's one. I once made a Q&D cat-like comparison of perl, Python and 
C on my gentoo-linux box, and the perl version was insanely faster than 
the C one.

Now the real question is IMHO: is the Python version fast enough ?

My 2 cents..


From gh at ghaering.de  Sat Jan 13 20:15:37 2007
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Sun, 14 Jan 2007 02:15:37 +0100
Subject: [ANN] pysqlite 2.3.3 released
Message-ID: <45A98439.8050005@ghaering.de>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

pysqlite 2.3.1 released
=======================

I'm pleased to announce the availability of pysqlite 2.3.3. This is a
bugfix release.

Go to http://pysqlite.org/ for downloads, online documentation and
reporting bugs.

What is pysqlite?

    pysqlite is a DB-API 2.0-compliant database interface for SQLite.

    SQLite is a relational database management system contained in a
    relatively small C library. It is a public domain project created
    by D. Richard Hipp.  Unlike the usual client-server paradigm, the
    SQLite engine is not a standalone process with which the program
    communicates, but is linked in and thus becomes an integral part
    of the program. The library implements most of SQL-92 standard,
    including transactions, triggers and most of complex queries.

    pysqlite makes this powerful embedded SQL engine available to
    Python programmers. It stays compatible with the Python database
    API specification 2.0 as much as possible, but also exposes most
    of SQLite's native API, so that it is for example possible to
    create user-defined SQL functions and aggregates in Python.

    If you need a relational database for your applications, or even
    small tools or helper scripts, pysqlite is often a good fit. It's
    easy to use, easy to deploy, and does not depend on any other
    Python libraries or platform libraries, except SQLite. SQLite
    itself is ported to most platforms you'd ever care about.

    It's often a good alternative to MySQL, the Microsoft JET engine
    or the MSDE, without having any of their license and deployment
    issues.

pysqlite can be downloaded from http://pysqlite.org/ - Sources and
Windows binaries for Python 2.5, 2.4 and Python 2.3 are available.

=======
CHANGES
=======

- - self->statement was not checked while fetching data, which could
  lead to crashes if you used the pysqlite API in unusual ways.
  Closing the cursor and continuing to fetch data was enough.

- - Converters are stored in a converters dictionary. The converter name
  is uppercased first. The old upper-casing algorithm was wrong and
  was replaced by a simple call to the Python string's upper() method
  instead.

- -Applied patch by Glyph Lefkowitz that fixes the problem with
 subsequent SQLITE_SCHEMA errors.

- - Improvement to the row type: rows can now be iterated over and have a
keys()
  method. This improves compatibility with both tuple and dict a lot.

- - A bugfix for the subsecond resolution in timestamps.

- - Corrected the way the flags PARSE_DECLTYPES and PARSE_COLNAMES are
  checked for. Now they work as documented.

- - gcc on Linux sucks. It exports all symbols by default in shared
  libraries, so if symbols are not unique it can lead to problems with
  symbol lookup.  pysqlite used to crash under Apache when mod_cache
  was enabled because both modules had the symbol cache_init. I fixed
  this by applying the prefix pysqlite_ almost everywhere. Sigh.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.3 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFFqYQ5dIO4ozGCH14RAlvkAKCAXPZJSPqX6lZMWvAgZPwbbznEXwCdEvPv
d3deYn5TZsQ4xn2VEcw+WBE=
=U221
-----END PGP SIGNATURE-----


From bignose+hates-spam at benfinney.id.au  Tue Jan 30 04:58:14 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 30 Jan 2007 20:58:14 +1100
Subject: Diff between opening files in 'r' and 'r+' mode
References: <1170149775.253373.318960@q2g2000cwa.googlegroups.com>
Message-ID: <874pq8ygy1.fsf@benfinney.id.au>

"raghu" <vgvr620034 at gmail.com> writes:

> i want to know the difference between 'r' mode and 'r+' mode
> 1.i = open('c:\python25\integer.txt','w')-------->for writiing
>   i.write('hai')--------->written some content in text file
>   i = open('c:\python25\integer.txt','r')---->for reading
>   print i.read()---->for printing the contents in that text file
>   i = open('c:\python25\integer.txt','w')---------->for writing
>   i.write('how')-----------?Rewrite the contents
>   print i.read()
> [MY QUESTION]:i want to read the text file contents cant it be done by 
> giving (print i.read())?
> Before going to next question [I deleted all the contents in the text 
> file]

This is amazingly hard to read. Can you please post your message
again, this time using ordinary whitespace (e.g. a blank line) to
separate program examples from other text.

All the punctuation characters you're using have typographical
meaning, and your arbitrary use of them for apparently decorative
purposes make it difficult to see what you're trying to day.

-- 
 \             "Experience is that marvelous thing that enables you to |
  `\      recognize a mistake when you make it again."  -- Franklin P. |
_o__)                                                            Jones |
Ben Finney



From mfmdevine at gmail.com  Wed Jan 24 03:50:17 2007
From: mfmdevine at gmail.com (amadain)
Date: 24 Jan 2007 00:50:17 -0800
Subject: Getting to an SSH account over a HTTP proxy
In-Reply-To: <mailman.3022.1169548086.32031.python-list@python.org>
References: <mailman.2985.1169469575.32031.python-list@python.org>
	<1169514995.916358.17030@11g2000cwr.googlegroups.com>
	<mailman.3022.1169548086.32031.python-list@python.org>
Message-ID: <1169628615.639734.213190@d71g2000cwa.googlegroups.com>

use pexpect to set the prompt after the login.

class Login(General):
	"""Class spawning an ssh expect instance"""
	def __init__(self, user, host, pwd, cfg_name=None, log=None):
		if cfg_name:
			self.testcell = test_config(cfg_name)
		self.spawn = pexpect.spawn("ssh %s@%s" % (user, host), [], 100)
		if log:
			self.spawn.logfile = log
		sshreply = self.spawn.expect(["Last login", "assword", "connecting"])

		if sshreply == 1:
			self.spawn.sendline(pwd)
			self.spawn.expect("Last login")
		elif sshreply == 2:
			time.sleep(0.1)
			self.spawn.sendline("yes")
			print self.spawn.after
			Login(user, host, cfg_name, log)
		time.sleep(1)
		self.prompt=prompt_chg(self.spawn, "PROMPT:")
		self.spawn.sendline("uname -a")
		self.spawn.expect(self.prompt)


On Jan 23, 10:28 am, Willi Richert <w.rich... at gmx.net> wrote:
> Am Dienstag, 23. Januar 2007 02:16 schrieb Nanjundi:
>
>
>
> > BJ?rn Lindqvist wrote:
> > > I want to use Python to connect to a SSH account over a HTTP proxy to
> > > automate some operations. I thought paramiko would be able to do that,
> > > but it can not (it seems).
>
> > > Is there some other Python module that can do what I want?
>
> > > --
> > > mvh Bj?rn
>
> > Did you take a look at twisted library?
> > twistedmatrix.com
> >http://twistedmatrix.com/projects/core/documentation/howto/clients.html
>
> > I haven't tried to connect over port 80, but its worth a try.
>
> > -NIf you need it for automation you might want to usepexpect:http://pexpect.sourceforge.net/
>
> It listens to the tty-stream and simulates a user typing in commands. It is
> very useful, e.g. if you want to start processes on many machines over ssh.
> If there are gateways/firewalls between - no problem just use a
> second "sendline('ssh user at nextmachine')"
>
> The only problem is the regular expression: If e.g. you use a custom $PS1
> variable for your prompt you have to account for that.
> 
> Regards,
> wr



From larry.bates at websafe.com  Wed Jan 31 10:26:18 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 31 Jan 2007 09:26:18 -0600
Subject: Help needed on config files
In-Reply-To: <1170237893.930122.138300@v45g2000cwv.googlegroups.com>
References: <1170237893.930122.138300@v45g2000cwv.googlegroups.com>
Message-ID: <45C0B51A.20801@websafe.com>

jvdb wrote:
> Hi there,
> 
> I am quite new on python programming and need some help on solving my
> problem..
> 
> I have to make a (python) program which deletes files from
> directories. I don't think deleting, etc. is the problem. The problem
> is that the directories where i have to delete them are 'dynamic'/
> subject to change. So what i thought is to make a config file
> containing an identifier (useful for myself) and there the directory.
> something like:
> [PROJECTx]
> <path>
> [PROJECTy]
> <path>
> 
> I have already seen that there are sorts of modules where you can read
> a config file, but only when you know the key.. Can someone help me
> out on this? The configfile can be altered in time (as there are more
> projects coming where i have to delete files on a scheduled basis).
> 
> This is a good learning project for me, but i really don't see how to
> solve this.
> 
Others have answered your specific question, I thought I'd add my
2 cents.  As the config file grows you will need to have other
sections that are not PROJECT# sections.  I use the pattern:

from ConfigParser import ConfigParser
cfg = ConfigParser()
cfg.read("proj.cfg")
projectSections=[section for section in cfg.sections()
                 if x.startswith('PROJECT')]

#
# Note: sections are case sensitive
#
for project in projectSections:
    #
    # Do your work
    #

-Larry



This seems to work quite well.  I hope information helps.

-Larry


From facundo at taniquetil.com.ar  Wed Jan 24 07:53:16 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Wed, 24 Jan 2007 12:53:16 +0000 (UTC)
Subject: newbie question: ftp.storbinary()
References: <BAY119-F308650E60A44C911FD66C7C4AD0@phx.gbl>
Message-ID: <ep7krr$s44$1@sea.gmane.org>

Scott Ballard wrote:

> Sorry for the lame question, I'm still trying to pick up Python and new to 
> the list here.

Welcome!


> I'm assuming that  I should use storbinary( command, file[, blocksize]) to 
> transfer the files. the documentation says "command should be an appropriate 
> "STOR" command: "STOR filename"."

For example:

>>> fp = open("/tmp/file_to_transfer.txt")   # open the file
>>> self.ftp.storbinary("STOR file_to_transfer.txt", fp)   # note that the name has not the path
>>> fp.close()  # close the file, :)

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From duncan.booth at invalid.invalid  Wed Jan  3 05:56:14 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 3 Jan 2007 10:56:14 GMT
Subject: import order or cross import
References: <mailman.2236.1167814387.32031.python-list@python.org>
Message-ID: <Xns98AD6F4382DA5duncanbooth@127.0.0.1>

Roland Hedberg <roland.hedberg at adm.umu.se> wrote:

> Now, running ONE.py causes no problem it will print "Black", but running
> TWO.py I get:
> AttributeError: 'module' object has no attribute 'BaseColor'
> 
> So, how can this be solved if it can be ?
> 

When you execute an import statement, it checks whether the module already 
exists. If it does exist then it immediately returns the module object. If 
the module does not yet exist then the module is loaded and the code it 
contains is executed.

Remember that all statements in Python are executed at the time they are 
encountered: there are no declarations (apart from 'global') so no looking 
ahead to see what classes or functions are coming up.

One other complication in your particular instance: when you run a ONE.py 
as a script the script is loaded in a module called '__main__', so 'import 
ONE' will actually load a separate module which is NOT the same as the 
__main__ module. Likewise when you run TWO.py as a script you have three 
modules __main__ (loaded from TWO.py), ONE, and TWO.

So running TWO.py, you get:

   import ONE
      --- loads the module ONE and starts executing it
      import TWO
          --- loads the module TWO and starts executing it
          import ONE
              --- the module ONE already exists 
                  (even though so far it hasn't got beyond
                  the import TWO line) so the empty module is returned.
      class Black(ONE.BaseColor):
              --- ONE doesn't have a BaseColor attribute yet so you get 
                  an error.

The fix in this sort of case is usually to extract the base class out to a 
third module. If you put BaseColor in base.py then you can safely import 
that anywhere you want it.

An alternative in this case would be to edit ONE.py and move the line 
'import TWO' down below the definition of BaseColor: nothing before that 
actually requires TWO to have been imported yet.

However, you really should try to separate scripts from modules otherwise 
the double use as both __main__ and a named module is going to come back 
and bite you.


From nmm1 at cus.cam.ac.uk  Mon Jan  8 08:39:55 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 8 Jan 2007 13:39:55 GMT
Subject: Bizarre floating-point output
Message-ID: <enthjb$p0l$1@gemini.csx.cam.ac.uk>


x = (1.234567890125, 1.2345678901255)
print x
print x[0], x[1]

>>> (1.2345678901249999, 1.2345678901254999)
>>> 1.23456789012 1.23456789013

Is there a rational reason, or is that simply an artifact of the way
that the code has evolved?  It is clearly not a bug :-)


Regards,
Nick Maclaren.


From zhangry at feng.co.jp  Tue Jan 16 03:12:04 2007
From: zhangry at feng.co.jp (HYRY)
Date: 16 Jan 2007 00:12:04 -0800
Subject: why scipy cause my program slow?
Message-ID: <1168935124.912419.147250@a75g2000cwd.googlegroups.com>

Why the exec time of test(readdata()) and test(randomdata()) of
following program is different?
my test file 150Hz10dB.wav has 2586024 samples, so I set randomdata
function
to return a list with 2586024 samples.
the exec result is:
2586024
<type 'list'>
10.8603842736
2586024
<type 'list'>
2.16525233979
test(randomdata()) is 5x faster than test(readdata())
if I remove "from scipy import *" then I get the following result:
2586024
<type 'list'>
2.21851601473
2586024
<type 'list'>
2.13885042216

So, what the problem with scipy?
Python 2.4.2, scipy ver. 0.5.1


import wave
from scipy import *
from time import *
import random
from array import array

def readdata():
    f = wave.open("150Hz10dB.wav", "rb")
    t = f.getparams()
    SampleRate = t[2]
    data = array("h", f.readframes(t[3]))
    f.close()
    left = data[0::2]
    mean = sum(left)/float(len(left))
    left = [abs(x-mean) for x in left]
    return left

def randomdata():
    return  [random.random()*32768.0 for i in xrange(2586024)]

def test(data):
    print len(data)
    print type(data)
    envelop = []
    e = 0.0
    ga, gr = 0.977579425259, 0.999773268338
    ga1, gr1 = 1.0 - ga, 1.0 - gr
    start = clock()
    for x in data:
        if e < x:
            e *= ga
            e += ga1*x
        else:
            e *= gr
            e += gr1*x
        envelop.append(e)
    print clock() - start
    return envelop

test(readdata())    
test(randomdata())



From http  Wed Jan 24 19:11:07 2007
From: http (Paul Rubin)
Date: 24 Jan 2007 16:11:07 -0800
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169683654.672020.136820@q2g2000cwa.googlegroups.com>
Message-ID: <7xveiwklt0.fsf@ruckus.brouhaha.com>

"Klaas" <mike.klaas at gmail.com> writes:
> POSIX issues aside, Python's threading model should be less susceptible
> to memory-barrier problems that are possible in other languages (this
> is due to the GIL). 

But the GIL is not part of Python's threading model; it's just a
particular implementation artifact.  Programs that rely on it are
asking for trouble.

> Double-checked locking, frinstance, is safe in python even though it
> isn't in java.

What's that?

> Are you ever relying solely on the GIL to access shared data?

I think a lot of programs do that, which is probably unwise in the
long run.


From gagsl-py at yahoo.com.ar  Sat Jan 27 20:13:15 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 27 Jan 2007 22:13:15 -0300
Subject: stop script w/o exiting interpreter
References: <Lyauh.8689$QE6.2176@trnddc02> <wWQuh.1259$SE6.1215@trnddc03>
Message-ID: <epgtb3$u86$1@sea.gmane.org>

"Alan Isaac" <aisaac at american.edu> escribi? en el mensaje 
news:wWQuh.1259$SE6.1215 at trnddc03...

> Please note that this post has subject
> "stop script w/o exiting interpreter".
> Note that I can just put the undefined name ``stop`` on any line
> I want, and the script will stop execucting at that line and will
> return to the interactive interpreter, as I wish.  It is just that it
> returns with an error message, and I'd like to avoid that.

If this is just for playing inside the interpreter, just ignore the 
exception.
Or comment out all lines from 25 to end of script, some editors (including 
IDLE) have support for that.
Or use a giant """
string
""" if you can.
If you invoke your script with `python -i your_script.py` Python will show 
the interpreter prompt when your script finishes (either normally or raising 
an exception).

-- 
Gabriel Genellina




From smusnmrNOSPAM at yahoo.com  Thu Jan 25 09:02:11 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Thu, 25 Jan 2007 15:02:11 +0100
Subject: how to unistall a Python package?
Message-ID: <epad97$fhqb$1@zam602.zam.kfa-juelich.de>

Hi all,

installing a package with 'setup.py' is easy. But how do I uninstall the
package, once I want to get rid of it again?

Thanks,

siggi





From misterwang at gmail.com  Mon Jan 29 16:46:52 2007
From: misterwang at gmail.com (Peter  Wang)
Date: 29 Jan 2007 13:46:52 -0800
Subject: Compiling extension with Visual C++ Toolkit Compiler - MSVCR80.dll
In-Reply-To: <1170103633.189538.216620@v45g2000cwv.googlegroups.com>
References: <1170103633.189538.216620@v45g2000cwv.googlegroups.com>
Message-ID: <1170107212.889990.45450@a75g2000cwd.googlegroups.com>

On Jan 29, 2:47 pm, alexandre_irrt... at yahoo.com wrote:
> The library seems to build correctly (producing Polygon.py and
> cPolygon.pyd), but when I import it I get the following message from
> python.exe: "This application has failed to start because MSVCR80.dll
> was not found". I thought that this might be due to Python trying to
> link against  the .dll from Microsoft Visual C++ Express 2005, also
> installed on my PC, instead of MSVCR71.dll. So I've removed MS Visual C
> ++ Express 2005, and any trace of it from my environment variables,
> but that doesn't seem to change anything.

Alex,  I'm not familiar with the particular problem you're seeing, but 
did you try building the polygon library using the gcc that's included 
with the Enthought distribution?

python setup.py build_clib build_ext --inplace --compiler=mingw32


-Peter



From noone at nowhere.com  Sat Jan 27 23:43:10 2007
From: noone at nowhere.com (avidfan)
Date: Sat, 27 Jan 2007 22:43:10 -0600
Subject: log parser design question
Message-ID: <raaor29enqdo2d8n98ma5l8hsdv828v6jf@4ax.com>

I need to parse a log file using python and I need some advice/wisdom
on the best way to go about it:

The log file entries will consist of something like this:

ID=8688 IID=98889998 execute begin - 01.21.2007 status enabled 
	locked working.lock
	status running
	status complete
	
ID=9009 IID=87234785 execute wait - 01.21.2007 status wait
        waiting to lock 
	status wait
	waiting on ID=8688
	
and so on...

I need to be able to group these entries together, index them by ID
and IID, and search the context of each entry and if a certain status
if found (such as wait), then be able to return the ID or IID
(depending...) of that entry.

So I was considering parsing them to this effect:

in a dictionary, where the key is a tuple, and the value is a list:

{('ID=8688', 'IID=98889998'): ['ID=8688 IID=98889998 execute begin -
01.21.2007 status enabled', 'locked working.lock', 'status running',
'status complete']}

I am keeping the full text of each entry in the list so that I can
recreate them for display if need be.

I am fairly new to python, so could anyone offer any advice here
before I get too far and discover a fatal flaw that you might see
coming a mile away?

would I, with this design, be able to, for example, search each list
for "waiting on ID=8688", and when found, be able to associate that
value with one of the elements of it's key "ID=9009" ? or is this
approached flawed?  I'm assuming there is a better way, but I need
some advice...

I appreciate any thoughts.

Thanks.


From vinay_sajip at yahoo.co.uk  Fri Jan 19 06:02:44 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: 19 Jan 2007 03:02:44 -0800
Subject: selective logger disable/enable
References: <1169190498.593059.238150@q2g2000cwa.googlegroups.com>
Message-ID: <1169204564.348768.186900@38g2000cwa.googlegroups.com>

Gary Jefferson wrote:

> Suppose I have 3 modules that belong to a project, 'A', 'A.a' and 'B',
> and each module has its own logger, created with:
>
> module1logger = logging.getLogger('project.A')
>
> and
>
> module2logger = logging.getLogger('project.A.a')
>
> and
>
> module3logger = logging.getLogger('project.B')
>
>
> And I want to selectively enable/disable these, per module (for
> example, I only want logging from A and A.a, or just from B, etc).  It
> seems like logging.Filter is supposed to let me do this, but I can't
> see how to apply it globally.  Is there really no other way that to add
> a addFilter(filter) call to each of these loggers individually?
>

The documentation for Logger - see

http://docs.python.org/lib/node406.html

- shows that there are addFilter() and removeFilter() methods on the
Logger class which you can use to add or remove filters from individual
Logger instances. From the above page (entitled "14.5.1 Logger
Objects"):

addFilter(filt)
    Adds the specified filter filt to this logger.

removeFilter(filt)
    Removes the specified filter filt from this logger.

The parent section of Section 14.5.1, which is Section 14.5, was the
first search result when I just searched Google for "python logging".

Best regards,

Vinay Sajip



From arkanes at gmail.com  Mon Jan  8 10:47:04 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 8 Jan 2007 09:47:04 -0600
Subject: PDF rendering toolkit?
In-Reply-To: <32822fe60701051252s6353f10drc101109adc376fdb@mail.gmail.com>
References: <32822fe60701051252s6353f10drc101109adc376fdb@mail.gmail.com>
Message-ID: <4866bea60701080747s380f909ana6559da75d8d894f@mail.gmail.com>

On 1/5/07, Jorge Vargas <jorge.vargas at gmail.com> wrote:
> Hi
>
> I'm looking for a tool to take an actual .pdf file and display it in a
> window (I'm using wxwidgets at the moment)
>
> I have found several project but none seem to do what I need.
>
> http://sourceforge.net/projects/pdfplayground seems like a nice
> toolkit to edit pdf files with python code, but nothing about
> rendering.
>
> I have find out http://poppler.freedesktop.org/ but there seems to be
> no python bindings for it.
>
> there is also an example at http://www.daniweb.com/code/snippet618.html
> using wx.lib.pdfwin but that is windows only, I need at least Linux
> support better if it's platform independant as python *should* be
>
> and the reportlabs BSD packages can't do this.
> http://www.reportlab.org/devfaq.html#2.1.5
>
> anyone knows of a toolkit to do this? bonus points if's it is already
> integrated into wxpython
> --

Rendering PDF is quite hard, much harder than writing it. There are
relatively few PDF rendering solutions for any platform, and it's
non-trivial to merge one with a specific UI solution. So I'm not aware
of any cross-platform solution. Most PDF usage either embeds the Adobe
ActiveX control (on windows) or just shunts it off the user to find a
working PDF viewer.


From jeffrey at fro.man  Tue Jan  2 22:59:26 2007
From: jeffrey at fro.man (Jeffrey Froman)
Date: Tue, 02 Jan 2007 19:59:26 -0800
Subject: Iterate through list two items at a time
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
Message-ID: <12pmahqc7kclbfc@corp.supernews.com>

Dave Dean wrote:

>  I'm looking for a way to iterate through a list, two (or more) items at a
> time.

Here's a solution, from the iterools documentation. It may not be the /most/
beautiful, but it is short, and scales well for larger groupings:

>>> from itertools import izip
>>> def groupn(iterable, n):
...     return izip(* [iter(iterable)] * n)
... 
>>> list(groupn(myList, 2))
[(0, 1), (2, 3), (4, 5), (6, 7), (8, 9), (10, 11)]
>>> list(groupn(myList, 3))
[(0, 1, 2), (3, 4, 5), (6, 7, 8), (9, 10, 11)]
>>> list(groupn(myList, 4))
[(0, 1, 2, 3), (4, 5, 6, 7), (8, 9, 10, 11)]
>>> for a,b in groupn(myList, 2):
...     print a, b
... 
0 1
2 3
4 5
6 7
8 9
10 11
>>> 

Jeffrey




From martin at v.loewis.de  Thu Jan 18 13:25:34 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 18 Jan 2007 19:25:34 +0100
Subject: Memory Management in Embedded Python
In-Reply-To: <1169143866.351663.316890@l53g2000cwa.googlegroups.com>
References: <1169143866.351663.316890@l53g2000cwa.googlegroups.com>
Message-ID: <45AFBB9E.9090502@v.loewis.de>

Huayang Xia schrieb:
> I have a piece of code like this:
> 
>       void funct(PyObject* pyobj)
>       {
>          char   str[128];
>          strncpy(str, "just a test string", sizeof(str));
>          PyObject* pydata = PyObject_CallMethod(pyobj, "method_x",
> "s", str);
>          Py_DECREF(pydata);
>       }
> 
> After the function is exited, the str is not there anymore. Will this
> affect python operation. How does python use the str? It's copied or it
> just uses the pointer?

The interpreter creates a string object, and passes that to method_x.
Creating a string object does indeed create a copy. The string object
will be refcounted, so it exists as long as there is a reference to it.
Likely (unless the method_x implementation somehow stores the string),
it gets deallocated before PyObject_Call returns.

HTH,
Martin


From tjreedy at udel.edu  Thu Jan 18 15:45:55 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 18 Jan 2007 15:45:55 -0500
Subject: [Python-Dev] Deletion order when leaving a scope?
References: <45AEC612.1030001@hastings.org><mailman.2860.1169086798.32031.python-list@python.org>
	<45af14dc$0$7727$4c368faf@roadrunner.com>
Message-ID: <eooma1$eh0$1@sea.gmane.org>


"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote in message 
news:45af14dc$0$7727$4c368faf at roadrunner.com...
| "Calvin Spealman" <ironfroggy at gmail.com> wrote in message
| news:mailman.2860.1169086798.32031.python-list at python.org...
| > Absolutely an irrelevent side effect, especially when you take into
| > consideration the 4 and counting alternative implementations of the
| > language.
| >
| > None the less, I can explain why it is as it is, keeping in mind its
| > not like that on purpose, its just how it is. Locals are optimized
| > into an array for fast lookup. Every name assigned to in a function is
| > known as a local in that function and this internal array holds its
| > reference. It is simply a product of the array indexes and deletion
| > order being the same, 0 to N.
| >
|
| Oh good!  Now I can write code that relies on this behavior!

According to a followup on python-dev, you can't.  The above is the normal 
behavior (for CPython) but it can be modified by imports and 
cross-references.

Or did you forget a smiley?

tjr





From bdesth.quelquechose at free.quelquepart.fr  Mon Jan 29 16:54:53 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 29 Jan 2007 22:54:53 +0100
Subject: strip question
In-Reply-To: <1169876027.003477.161350@a75g2000cwd.googlegroups.com>
References: <1169876027.003477.161350@a75g2000cwd.googlegroups.com>
Message-ID: <45be664c$0$16363$426a74cc@news.free.fr>

eight02645999 at yahoo.com a ?crit :
> hi
> can someone explain strip() for these :
> [code]
> 
>>>>x='www.example.com'
>>>>x.strip('cmowz.')
> 
> 'example'
> [/code]
> 
> when i did this:
> [code]
> 
>>>>x = 'abcd,words.words'
>>>>x.strip(',.')
> 
> 'abcd,words.words'
> [/code]
> 
> it does not strip off "," and "." .Why is this so?

Probably because the Fine Manual(tm) says that str.strip() removes 
heading and trailing chars ?

"""
bruno at bibi ~ $ python
Python 2.4.1 (#1, Jul 23 2005, 00:37:37)
[GCC 3.3.4 20040623 (Gentoo Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)] on 
linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> help(''.strip)
Help on built-in function strip:

strip(...)
     S.strip([chars]) -> string or unicode

     Return a copy of the string S with leading and trailing
     whitespace removed.
     If chars is given and not None, remove characters in chars instead.
     If chars is unicode, S will be converted to unicode before stripping
"""


You may want to try str.replace() instead:

"""
 >>> help(''.replace)
Help on built-in function replace:

replace(...)
     S.replace (old, new[, count]) -> string

     Return a copy of string S with all occurrences of substring
     old replaced by new.  If the optional argument count is
     given, only the first count occurrences are replaced.
 >>> 'abcd,words.words'.replace(',', '').replace('.', '')
'abcdwordswords'
"""

> thanks

HTH



From mh at pixar.com  Tue Jan 30 11:45:55 2007
From: mh at pixar.com (Mark Harrison)
Date: Tue, 30 Jan 2007 16:45:55 GMT
Subject: test, please ignore qrm
Message-ID: <7DKvh.23723$yC5.18799@newssvr27.news.prodigy.net>

test, please ignore


From nogradi at gmail.com  Tue Jan 30 15:29:48 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Tue, 30 Jan 2007 21:29:48 +0100
Subject: subway code
Message-ID: <5f56302b0701301229q191fd378y3069a49536f8aa1f@mail.gmail.com>

(Somehow this message didn't go through for the first time.)

Does anyone know what happened to the subway project?

The sites gosubway.org and subway.python-hosting.com have been down
for a long time now. Actually, I would like to have the code just to
look at it and maybe learn something, but it seems it completely
disappeared from the net. Does anyone have access to it and the rights
to make it publically available?


From nmm1 at cus.cam.ac.uk  Wed Jan 24 13:21:38 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 24 Jan 2007 18:21:38 GMT
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
Message-ID: <ep883i$iom$1@gemini.csx.cam.ac.uk>


In article <mailman.3095.1169659417.32031.python-list at python.org>,
"Chris Mellon" <arkanes at gmail.com> writes:
|> > |>
|> > |> Does anyone have any conclusive evidence that python threads/locks are
|> > |> safe or unsafe?
|> >
|> > Unsafe.  They are built on top of unsafe primitives (POSIX, Microsoft
|> > etc.)  Python will shield you from some problems, but not all.
|> >
|> > There is precious little that you can do, because the root cause is
|> > that the standards and specifications are hopelessly flawed.
|> 
|> This is sufficiently inaccurate that I would call it FUD. Using
|> threads from Python, as from any other language, requires knowledge of
|> the tradeoffs and limitations of threading, but claiming that their
|> usage is *inherently* unsafe isn't true. It is almost certain that
|> your code and locking are flawed, not that the threads underneath you
|> are buggy.

I suggest that you find out rather more about the ill-definition of
POSIX threading memory model, to name one of the better documented
aspects.  A Web search should provide you with more information on
the ghastly mess than any sane person wants to know.

And that is only one of many aspects :-(


Regards,
Nick Maclaren.


From wise at hyperformix.com  Thu Jan 11 17:14:53 2007
From: wise at hyperformix.com (Tim)
Date: 11 Jan 2007 14:14:53 -0800
Subject: py2exe: zipfile=None raised ImportError
In-Reply-To: <mailman.2595.1168546715.32031.python-list@python.org>
References: <1168543966.212663.141840@i56g2000hsf.googlegroups.com>
	<mailman.2595.1168546715.32031.python-list@python.org>
Message-ID: <1168553693.344329.182090@p59g2000hsd.googlegroups.com>

Thomas Heller wote:
[..]
> Tim schrieb:
[...]
> > > File "...boot_common.py" ... no module name linecache
> > > File "<install zipextimporter> ... no module named zipextimporter
> > > File "my.py" ... no module name optparse
[...]
> Another tip:  You can examine what is in the zipfile, or the exe (if using
> zipfile=None) when you rename the file to a *.zip file, and open it with
> winzip or another archiver.

I clean before every compile.

When I look at the exe as a zip I see all the modules in the error
message: optparse.pyc, zipextimporter.pyc, and linecache.pyc.

I don't see boot_common.py. Why is it being called?

--
Tim



From Barry.Carroll at psc.com  Wed Jan 31 12:07:15 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Wed, 31 Jan 2007 09:07:15 -0800
Subject: What is the dummy statement that do nothing in Python?
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595ACA@eugsrv400.psc.pscnet.com>


> -----Original Message-----
> From: Dongsheng Ruan [mailto:ruan at jcmills.com]
> Sent: Wednesday, January 31, 2007 8:50 AM
> To: python-list at python.org
> Subject: What is the dummy statement that do nothing in Python?
> 
> I remember that in python there is some kind of dummy statement that
just
> holds space and does nothing.
> 
> I want it to hold the place after a something like if a>b: do nothing
> 
> I can't just leave the space blank after if statement because there
will
> be
> error message.
> 
> Does anybody know what to insert there?
> 
> Thanks!
> 
> 
Greetings:

Try 'pass':

<CODE>
if a>b:
    pass
else:
    dosomething()
</CODE>

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed




From rshepard at appl-ecosys.com  Thu Jan 25 17:34:31 2007
From: rshepard at appl-ecosys.com (Rich Shepard)
Date: Thu, 25 Jan 2007 14:34:31 -0800 (PST)
Subject: Right-Justifying Numeric Output
In-Reply-To: <ybauh.51060$oA1.7068@newsfe19.lga>
References: <mailman.3171.1169763446.32031.python-list@python.org>
	<ybauh.51060$oA1.7068@newsfe19.lga>
Message-ID: <Pine.LNX.4.64.0701251433350.15822@salmo.appl-ecosys.com>

On Thu, 25 Jan 2007, hg wrote:

> assuming max size = 10
>
> #with spaces
>>> '% 10d' % 11
> '        11'
> #with zeros
>>> '%010d' % 11
> '0000000011'

   Thank you very much! I didn't see this in any of my Python books or on the
Web.

Rich

-- 
Richard B. Shepard, Ph.D.               |    The Environmental Permitting
Applied Ecosystem Services, Inc.        |          Accelerator(TM)
<http://www.appl-ecosys.com>     Voice: 503-667-4517      Fax: 503-667-8863


From wdraxinger at darkstargames.de  Mon Jan 22 10:15:23 2007
From: wdraxinger at darkstargames.de (Wolfgang Draxinger)
Date: Mon, 22 Jan 2007 16:15:23 +0100
Subject: Program eating memory, but only on one machine?
References: <mailman.2986.1169473883.32031.python-list@python.org>
Message-ID: <c11f84-oo5.ln1@darkstargames.dnsalias.net>

Per B. Sederberg wrote:

> Python 2.4.4c1 (#2, Oct 11 2006, 20:00:03)
> [GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on
> [linux2 Type "help", "copyright", "credits" or "license" for
> more information.

Doesn't eat up.

> Python 2.4.3 (#1, Apr  7 2006, 10:54:33)
> [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
> Type "help", "copyright", "credits" or "license" for more
> information.

Doesn't eat up.

> Python 2.4.4 (#1, Jan 21 2007, 12:09:48)
> [GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-49)] on linux2
> Type "help", "copyright", "credits" or "license" for more
> information.

Eats up memory

> So, does anyone have any suggestions for how I can debug this
> problem?

Have a look at the version numbers of the GCC used. Probably
something in your C code fails if it interacts with GCC 3.x.x.
It's hardly Python eating memory, this is probably your C
module. GC won't help here, since then you must add this into
your C module.

>  If my program ate up memory on all machines, then I would know
> where to start and would blame some horrible programming on my
> end. This just seems like a less straightforward problem.

GCC 3.x.x brings other runtime libs, than GCC 4.x.x, I would
check into that direction.

Wolfgang Draxinger
-- 
E-Mail address works, Jabber: hexarith at jabber.org, ICQ: 134682867



From sluggoster at gmail.com  Tue Jan  9 14:57:04 2007
From: sluggoster at gmail.com (Mike Orr)
Date: 9 Jan 2007 11:57:04 -0800
Subject: Summarizing data by week
Message-ID: <1168372624.543712.149070@77g2000hsv.googlegroups.com>

What's the best way to summarize data by week?  I have a set of
timestamped records, and I want a report with one row for each week in
the time period, including zero rows if there are weeks with no
activity.  I was planning to use ISO weeks because datetime has a
convenient .isocalendar() method, but I want each output row to have a
label like this:

    2006 week 5 (Feb)

However, to get the month (of the Thursday of that week) I have to
convert it back to an actual date,and I don't see a method to do that
in datetime or dateutil or mx.DateTime.

I was planning to use a dateutil.rrule to generate the weeks from the
minimum to maximum date, including any weeks that have no activity (so
they won't be in the dictionary).  But rrule sequences are based on an
actual start date, not an ISO week, so that won't work.  Unless perhaps
I take the minimum date and calculate the Thursday of that week, and
start from there.  Then all my conversions would be to iso_week rather
than from iso_week.

Is there a better way to do this?

--Mike



From gonzlobo at gmail.com  Fri Jan 19 21:32:10 2007
From: gonzlobo at gmail.com (gonzlobo)
Date: Fri, 19 Jan 2007 19:32:10 -0700
Subject: OT Annoying Habits (Was: when format strings attack)
In-Reply-To: <pan.2007.01.20.02.22.52.492763@REMOVE.THIS.cybersource.com.au>
References: <mailman.2916.1169240529.32031.python-list@python.org>
	<pan.2007.01.20.02.22.52.492763@REMOVE.THIS.cybersource.com.au>
Message-ID: <be5994b50701191832y3668d9eft28f2bbfc388c2224@mail.gmail.com>

I should write a python script to read this. :)

>.snoitnevnoc
>hsilgnE tpada )ylbissop revenehw( dluohs ew os dna ,naitraM ton ,puorgswen
>egaugnal hsilgnE na no er'ew ,segaugnal hcus era ereht fi neve tuB


From steve at REMOVE.THIS.cybersource.com.au  Mon Jan  8 17:24:34 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 09 Jan 2007 09:24:34 +1100
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
	<mailman.2414.1168264117.32031.python-list@python.org>
Message-ID: <pan.2007.01.08.22.24.34.419033@REMOVE.THIS.cybersource.com.au>

On Mon, 08 Jan 2007 13:11:14 +0200, Hendrik van Rooyen wrote:

> When you hear a programmer use the word "probability" -
> then its time to fire him, as in programming even the lowest 
> probability is a certainty when you are doing millions of 
> things a second.

That is total and utter nonsense and displays the most appalling
misunderstanding of probability, not to mention a shocking lack of common
sense.


-- 
Steven.



From tkpmep at hotmail.com  Tue Jan 16 08:34:14 2007
From: tkpmep at hotmail.com (tkpmep at hotmail.com)
Date: 16 Jan 2007 05:34:14 -0800
Subject: Globbing files by their creation date
Message-ID: <1168954453.954486.188680@m58g2000cwm.googlegroups.com>

I'd like to create a list of all files in a directory that were created
after a certain date. How does one do this? I've used glob.glob to
create a list of all files whose name matches a substring, but I don't
see how I can use it to identify files by their creation date.

Thanks in advance for the assistance.

Thomas Philips



From erick.lavoie at gmail.com  Tue Jan 23 10:18:57 2007
From: erick.lavoie at gmail.com (=?ISO-8859-1?Q?Lavoie_=C9rick?=)
Date: Tue, 23 Jan 2007 10:18:57 -0500
Subject: How to get self reference from within a module?
Message-ID: <3ca9bbe50701230718s55029fc8n507eb357b298428f@mail.gmail.com>

I finally found what I was searching for here:

http://www.thescripts.com/forum/thread25264.html


I wanted the reference to the current module and we can obtain it this way:

sys.modules[__name__]

so its property can be used.

Thanks,

Erick
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070123/3407e8c8/attachment.html>

From huayang.xia at gmail.com  Wed Jan 10 17:05:56 2007
From: huayang.xia at gmail.com (Huayang Xia)
Date: 10 Jan 2007 14:05:56 -0800
Subject: where to find the spec of format in PyObject_CallMethod
Message-ID: <1168466755.996033.130120@i39g2000hsf.googlegroups.com>

I am trying to use PyObject_CallMethod. It needs a format string to
specify what are the followed arguments. Is it possible to use a
PyObject* as an argument?

Where can I find the spec for the format?

Thanks in advance.



From michael at mustun.ch  Sun Jan  7 18:24:16 2007
From: michael at mustun.ch (Michael M.)
Date: Mon, 08 Jan 2007 00:24:16 +0100
Subject: how to find the longst element list of lists
In-Reply-To: <mailman.2403.1168209108.32031.python-list@python.org>
References: <Vwdoh.223$L06.180@nntpserver.swip.net>	<45a169f0$0$309$426a34cc@news.free.fr>	<%keoh.230$L06.209@nntpserver.swip.net>
	<mailman.2403.1168209108.32031.python-list@python.org>
Message-ID: <eifoh.238$L06.186@nntpserver.swip.net>

Sorry, wrong place.


From nmm1 at cus.cam.ac.uk  Fri Jan 12 10:55:39 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 12 Jan 2007 15:55:39 GMT
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<mailman.2597.1168550439.32031.python-list@python.org>
	<eo6ia5$5bt$1@gemini.csx.cam.ac.uk>
	<mailman.2643.1168611301.32031.python-list@python.org>
	<eo883j$l9d$1@gemini.csx.cam.ac.uk>
	<mailman.2648.1168616202.32031.python-list@python.org>
Message-ID: <eo8b1r$r9c$1@gemini.csx.cam.ac.uk>


In article <mailman.2648.1168616202.32031.python-list at python.org>,
Carsten Haese <carsten at uniqsys.com> writes:
|> 
|> Ah, so now you're putting words in the BDFL's mouth. ;)
|> 
|> The pronouncement does say "The needs outlined in the rationale section
|> have been addressed to some extent by the acceptance of PEP 327 for
|> decimal arithmetic," but it doesn't say to which extent, and it
|> certainly doesn't claim that decimal arithmetic is a replacement for
|> rational arithmetic.

Eh?  If the needs are addressed to some extent, then to some extent
it is a replacement.

|> The sentence you're referring to is "There are excellent Rational
|> implementations [...]. Probably worth PEPping, not worth doing without
|> Decimal." I agree that this sentence is poorly worded, but I think it
|> means "Even if we had Rational, we'd still need Decimal" in the sense
|> that Rational is not an adequate replacement for Decimal.

Which would be justifiable, but is not what it said.  What it SAID is
what I said it said ....

|> The bottom line is that there are use cases for both Rational and
|> Decimal, and neither one can replace the other,

So far, so good.  With reservations, I agree.

|> but there are more use
|> cases for Decimal than for Rational.

That is dubious, but let's not start that one again.


Regards,
Nick Maclaren.


From pierre.imbaud at laposte.net  Tue Jan 30 09:34:11 2007
From: pierre.imbaud at laposte.net (Imbaud Pierre)
Date: Tue, 30 Jan 2007 15:34:11 +0100
Subject: data design
Message-ID: <45bf5763$0$22792$426a34cc@news.free.fr>

The applications I write are made of, lets say, algorithms and data.
I mean constant data, dicts, tables, etc: to keep algorithms simple,
describe what is peculiar, data dependent, as data rather than "case
statements". These could be called configuration data.

The lazy way to do this: have modules that initialize bunches of
objects, attributes holding the data: the object is somehow the row of
the "table", attribute names being the column. This is the way I
proceeded up to now.
Data input this way are almost "configuration data", with 2 big
drawbacks:
  - Only a python programmer can fix the file: this cant be called a
    configuration file.
  - Even for the author, these data aint easy to maintain.

I feel pretty much ready to change this:
- make these data true text data, easier to read and fix.
- write the module that will make python objects out of these data:
the extra cost should yield ease of use.

2 questions arise:
- which kind of text data?
     - csv: ok for simple attributes, not easy for lists or complex
     data.
     - xml: the form wont be easier to read than python code,
       but an xml editor could be used, and a formal description
       of what is expected can be used.
- how can I make the data-to-object transformation both easy, and able
   to spot errors in text data?

Last, but not least: is there a python lib implementing at least part
of this dream?


From ldo at geek-central.gen.new_zealand  Wed Jan 10 01:46:46 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 10 Jan 2007 19:46:46 +1300
Subject: How do I add users using Python scripts on a Linux machine
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
	<ene0j1$6nk$03$1@news.t-online.com>
	<m2fyatcddg.fsf@ordesa.cs.uu.nl>
	<eng5qv$6l4$00$1@news.t-online.com>
	<m2hcv651ta.fsf@ordesa.cs.uu.nl> <enks9m$nsh$1@lust.ihug.co.nz>
	<m2bqlctbce.fsf@ordesa.lan>
Message-ID: <eo221u$epg$1@lust.ihug.co.nz>

In message <m2bqlctbce.fsf at ordesa.lan>, Piet van Oostrum wrote:

> Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> (LD) wrote:
> In message <m2hcv651ta.fsf at ordesa.cs.uu.nl>, Piet van Oostrum wrote:
> 
>> The scenario is as follows: Suppose the script starts with the line:
>> #!/usr/bin/python
>> 
>> (using #!/usr/bin/env python would be disastrous because the user could
>> supply his own `python interpreter' in his PATH.)
>> 
>> Now a malicious user can make a link to this file in his own directory,
>> e.g. to /Users/eve/myscript1. Because permissions are part of the file
>> (inode), not of the file name, this one is also suid.
>> 
>> Now she execs /Users/eve/myscript1. The kernel, when honoring suid
>> scripts, would startup python with effective uid root with the command
>> line: /usr/bin/env /Users/eve/myscript1
>> 
>>LD> No it wouldn't. This security hole was fixed years ago.
> 
> How?

Systems which allow set-uid scripts also usually support referring to open
file descriptors n via a pathname like /dev/fd/n. This might be done by
mounting a special pseudo-filesystem (fdfs) on /dev/fd. (This was how I
remember it being done on DEC UNIX.)

So when a the kernel detects that an executable file is actually a script,
it opens the script file on some file descriptor n, and passes the
name /dev/fd/n to the script interpreter, instead of the original script
pathname. That way, there is no opportunity for deceiving the process into
executing the wrong script with set-uid privileges.


From gagsl-py at yahoo.com.ar  Mon Jan  8 12:22:00 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 08 Jan 2007 14:22:00 -0300
Subject: Recommendations (or best practices) to define functions
	(or methods)
In-Reply-To: <1168262749.852897.13010@q40g2000cwq.googlegroups.com>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
	<45A1F1D9.8070206@v.loewis.de>
	<1168262749.852897.13010@q40g2000cwq.googlegroups.com>
Message-ID: <7.0.1.0.0.20070108140718.05c30858@yahoo.com.ar>

At Monday 8/1/2007 10:25, vizcayno wrote:

>However, what happens when the error is due to data error. Or when the
>program is reading many files to save data into a database and one or
>two files have problems with data format. I would like to keep the
>program running (using exception in a controlled way) for the remaining
>good files and prepare a log about the failed files. How to keep the
>same function for a program that runs in batch, or on-line or in  the
>web? Giving the simple example I put, I would like to find more
>guidelines.

Deal with the exception at a higher level. In your example, you have 
some files to be processed:

for fname in filenames:
    do_something_with(fname)

==>

for fname in filenames:
     try:
         do_something_with(fname)
     except StandardError, E:
         log_error(E)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 13 20:24:14 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 14 Jan 2007 12:24:14 +1100
Subject: Boilerplate in rich comparison methods
References: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>
	<1168674664.792869.213260@m58g2000cwm.googlegroups.com>
	<45a90301$0$7677$4c368faf@roadrunner.com>
	<pan.2007.01.13.19.08.03.19901@REMOVE.THIS.cybersource.com.au>
	<5Jcqh.1188$G23.509@newsreading01.news.tds.net>
Message-ID: <pan.2007.01.14.01.24.13.951656@REMOVE.THIS.cybersource.com.au>

On Sat, 13 Jan 2007 22:05:53 +0000, Neil Cerutti wrote:

>> Anyone want to argue that this is a worthwhile optimization? :)
> 
> Perhaps. But first test it with "==".

Oh the ignominy! That's what happens when I run code at 6am :(

>>> x = CompareWithIdentity(1); y = CompareWithIdentity(1)
>>> timeit.Timer("x == y", "from __main__ import x,y").repeat()
[2.2971229553222656, 2.2821698188781738, 2.2767620086669922]
>>> timeit.Timer("x == x", "from __main__ import x,y").repeat()
[1.6935880184173584, 1.6783449649810791, 1.6613109111785889]

>>> x = Compare(1); y = Compare(1)
>>> timeit.Timer("x == y", "from __main__ import x,y").repeat()
[2.1717329025268555, 2.1361908912658691, 2.1338419914245605]

So for this simple case, testing for identity is a factor of 1.3 faster
when the objects are identical, and a factor of 1.1 slower if they aren't.
That suggests that if about 33% of your comparisons match by identity,
you'll break-even; any less than that, and the optimization is actually a
pessimation.



-- 
Steven.



From nogradi at gmail.com  Wed Jan 24 17:55:51 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Wed, 24 Jan 2007 23:55:51 +0100
Subject: file -> open in stdlib patch
Message-ID: <5f56302b0701241455s69326dd0k73797deeb6153cdd@mail.gmail.com>

Hi list,

AFAIK using file( ) to open a file is deprecated in favor of open( )
and while grepping through the stdlib I noticed a couple of occurences
of file( ) in the latest revision. I made a patch for getting rid of
them; it passes all the tests. Although the change is almost trivial,
since this is my first patch maybe it's better if someone
knowledgeable takes a look at it before submitting it to SF.

Daniel



Index: Lib/site.py
===================================================================
--- Lib/site.py (revision 53548)
+++ Lib/site.py (working copy)
@@ -274,7 +274,7 @@
             for filename in self.__files:
                 filename = os.path.join(dir, filename)
                 try:
-                    fp = file(filename, "rU")
+                    fp = open(filename, "rU")
                     data = fp.read()
                     fp.close()
                     break
Index: Lib/webbrowser.py
===================================================================
--- Lib/webbrowser.py   (revision 53548)
+++ Lib/webbrowser.py   (working copy)
@@ -216,7 +216,7 @@
         cmdline = [self.name] + raise_opt + args

         if remote or self.background:
-            inout = file(os.devnull, "r+")
+            inout = open(os.devnull, "r+")
         else:
             # for TTY browsers, we need stdin/out
             inout = None
@@ -340,7 +340,7 @@
         else:
             action = "openURL"

-        devnull = file(os.devnull, "r+")
+        devnull = open(os.devnull, "r+")
         # if possible, put browser in separate process group, so
         # keyboard interrupts don't affect browser as well as Python
         setsid = getattr(os, 'setsid', None)
Index: Lib/pstats.py
===================================================================
--- Lib/pstats.py       (revision 53548)
+++ Lib/pstats.py       (working copy)
@@ -173,7 +173,7 @@

     def dump_stats(self, filename):
         """Write the profile data to a file we know how to load back."""
-        f = file(filename, 'wb')
+        f = open(filename, 'wb')
         try:
             marshal.dump(self.stats, f)
         finally:


From robert.kern at gmail.com  Wed Jan  3 15:42:40 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 03 Jan 2007 14:42:40 -0600
Subject: Unsubscribing from the list
In-Reply-To: <880dece00701031033o151cbe76h92a5a5adde51db90@mail.gmail.com>
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>	<ene064$bm5$1@sea.gmane.org>	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>	<enghj3$qhf$1@sea.gmane.org>	<880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com>	<engs22$6u3$1@sea.gmane.org>
	<880dece00701031033o151cbe76h92a5a5adde51db90@mail.gmail.com>
Message-ID: <enh4g4$n0h$1@sea.gmane.org>

Dotan Cohen wrote:
> On 03/01/07, Fredrik Lundh <fredrik at pythonware.com> wrote:
>> Robert provided *detailed* instructions, which you ignored.   I quoted
>> the same instructions in my reply, which you also ignored.  the sentence
>> after the one where you stopped reading also tells you what to do.  one
>> might suspect that you don't really want to unsubscribe from this list...
> 
> I didn't ignore his instructions. I went to the page, and found what I
> was looking for. I told him thank you, and explained why I didn't find
> it the first time.

He misunderstood you (as I nearly did, too). The way you phrased "decided that
there was no futher interest on the page for me" is somewhat ambiguous: it can
seem like it refers to the second time, not the first.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From exarkun at divmod.com  Tue Jan 23 20:30:05 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 23 Jan 2007 20:30:05 -0500
Subject: smtplib starttls gmail example
In-Reply-To: <L9xth.1926$dN2.607@trnddc07>
Message-ID: <20070124013005.17245.470171872.divmod.quotient.9408@ohm>

On Tue, 23 Jan 2007 23:48:59 GMT, py <py at th.on> wrote:
>Hi, Jean Paul.
>
>I read your code with interest. I wonder, does twisted also raise the socket error or does it know
>about this apparently well-known and often ignored incompatibility between the standard and
>the implementations?

Twisted delivers disconnection notification by passing an exception to a
method on a protocol instance.  So, whether it dealt with this SSL behavior
or not, you wouldn't see an exception being raised from the program I posted.
However, if one implements connectionLost (the method which Twisted calls on disconnect), if SSL shutdown isn't done cleanly, you will see an SSL exception
object instead of an exception which indicates clean shutdown.  However, since
the example I posted didn't actually directly interact with any protocol
object at all, all of this is hidden.  The program will appear to succeed
completely with no error, because the success condition it defines is for
the message to have been accepted by the remote host, not for the socket to
have been closed cleanly.

>
>Something else has occurred to me. After starting tls, all the xmitted commands and data are encrypted before they leave the client machine.
>so obviously they have to be decrypted by the server's socket lib before the smtp daemon can do what it's supposed to do.
>but i wonder if the encryption of the trailing \n.\n has something to do with the socket error, given that
>the error msg says something about premature EOF.

As to this, I'm not sure.  A cursory glance at smtplib.py suggests it is at
least trying to handling the \r\n.\r\n sequence which terminates a DATA
command correctly.  I'm not sure why you needed to add your own . when you
used it.  I think the SSL error is most likely unrelated, though.  I have
seen it from gmail's servers before as well.

Jean-Paul


From gherron at islandtraining.com  Tue Jan 16 21:19:34 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 16 Jan 2007 18:19:34 -0800
Subject: Newbie: Capture traceback message to string?
In-Reply-To: <8E19FBD5-47DC-4FE3-9E5C-B143664CC846@datafly.net>
References: <8E19FBD5-47DC-4FE3-9E5C-B143664CC846@datafly.net>
Message-ID: <45AD87B6.1050506@islandtraining.com>

Sean Schertell wrote:
> Hello!
>
> I'm new to Python and this is my first post to the list.
>
> I'm trying to simply capture exception text to a few strings which  
> can be passed to a PSP page to display a pretty error message. The  
> problem is that I just can't seem to figure out how to get the basic  
> components of the traceback message into strings. Here's what I want  
> to do:
>   
The traceback module provides a wealth of ways to get at the exception 
information, formated and usable in various ways.

See: http://docs.python.org/lib/module-traceback.html

Gary Herron

> ---------------------
> try:
> 	bad_math = 1/0
> except:
> 	info = sys.exc_info()
> 	main_error_str = # ???
> 	full_traceback_str = # ???
> 	tmpl = psp.PSP(req, filename='error.html')
>          tmpl.run({'main_error_str': main_error_str,  
> 'full_traceback_str':full_traceback_str})
>
> return apache.OK
> ---------------------
>
> ...So then my PSP page receives the errors as variables containing  
> strings.
>
> I've been googling and experimenting for more hours than I care to  
> admit. A little help please?
>
> Thanks!
>
> Sean
>
>
>   



From rdm at rcblue.com  Thu Jan 11 11:24:48 2007
From: rdm at rcblue.com (Dick Moores)
Date: Thu, 11 Jan 2007 08:24:48 -0800
Subject: What happened to SPE?
In-Reply-To: <RWsph.46007$Nb2.875778@news1.nokia.com>
References: <RWsph.46007$Nb2.875778@news1.nokia.com>
Message-ID: <7.0.1.0.2.20070111082234.07b35570@rcblue.com>

At 07:43 AM 1/11/2007, Paulo Pinto wrote:
>does anyone know what happened to SPE?
>
>It seems that the address http://pythonide.stani.be
>is no longer valid. :(

I'd suggest subscribing to the Python-spe-users list, 
<https://lists.berlios.de/mailman/listinfo/python-spe-users>, or 
reading the archive there.

Dick Moores





From mail at a-beyer.de  Mon Jan  1 22:20:21 2007
From: mail at a-beyer.de (Andreas Beyer)
Date: Mon, 01 Jan 2007 19:20:21 -0800
Subject: mutable numeric type
Message-ID: <4599CF75.6070209@a-beyer.de>

There has been quite some traffic about mutable and immutable data types 
on this list. I understand the issues related to mutable numeric data 
types. However, in my special case I don't see a better solution to the 
problem.
Here is what I am doing:

I am using a third party library that is performing basic numerical 
operations (adding, multiplying, etc.) with objects of unknown type. Of 
course, the objects must support the numerical operators. In my case the 
third party library is a graph algorithm library and the assigned 
objects are edge weights. I am using the library to compute node 
distances, etc.

I would like to be able to change the edge weights after creating the 
edges. Otherwise, I would have to remove the edges and re-create them 
with the new values, which is quite costly. Since I also didn't want to 
change the code of the graph library, I came up with a mutable numeric 
type, which implements all the numerical operators (instances are of 
course not hashable). This allows me to change the edge weights after 
creating the graph.

I can do the following:
 >>> x = MutableNumeric(10)
 >>> y = MutableNumeric(2)
 >>> x*y
20
 >>> x.value = 1.3
 >>> x*y
2.6000000000000001
 >>>

The effect of numerical operations is determined by the contained basic 
data types:
 >>> x.value = 3
 >>> x/2
1
 >>> x.value = 3.0
 >>> x/2
1.5
 >>>

Augmented operations change the instance itself:
 >>> x.value = 0
 >>> id(x)
-1213448500
 >>> x += 2
 >>> x
MutableNumeric(2)
 >>> id(x) # show that same instance
-1213448500
 >>>

Is there anything wrong with such design? I am a bit surprised that 
Python does not already come with such data type (which is really simple 
to implement). Is there something that I am missing here?

Thanks!
    Andreas



From http  Thu Jan 25 15:07:51 2007
From: http (Paul Rubin)
Date: 25 Jan 2007 12:07:51 -0800
Subject: Python does not play well with others
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
	<1169726842.719104.304300@v45g2000cwv.googlegroups.com>
	<wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
	<1169755188.989078.75510@v33g2000cwv.googlegroups.com>
Message-ID: <7xveiudg4o.fsf@ruckus.brouhaha.com>

"sjdevnull at yahoo.com" <sjdevnull at yahoo.com> writes:
> I haven't had a need to do anything with OpenSSL from Python; all
> that takes place in the Apache server 

That's a reasonable approach for a typical server-side web
application, but there are other types of Python apps that can also
want to use SSL.  It's a pain to have to deal with OpenSSL at all, and
I hope that TLSLite (a very incomplete SSL implementation written in
pure Python) one day becomes complete and does all the stuff that JSSE
does.

> (possibly with some mod_rewrite rules to ensure that certain pages
> are only hit from https and so forth).

Normally you'd do that SSLRequireSSL or SSLRequire, if that matters.


From danb_83 at yahoo.com  Sat Jan 13 13:43:24 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 13 Jan 2007 10:43:24 -0800
Subject: Boilerplate in rich comparison methods
In-Reply-To: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>
References: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>
Message-ID: <1168713802.798237.171610@s34g2000cwa.googlegroups.com>

On Jan 13, 12:52 am, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> I'm writing a class that implements rich comparisons, and I find myself
> writing a lot of very similar code. If the calculation is short and
> simple, I do something like this:
>
> class Parrot:
>     def __eq__(self, other):
>         return self.plumage() == other.plumage()
>     def __ne__(self, other):
>         return self.plumage() != other.plumage()
>     def __lt__(self, other):
>         return self.plumage() < other.plumage()
>     def __gt__(self, other):
>         return self.plumage() > other.plumage()
>     def __le__(self, other):
>         return self.plumage() <= other.plumage()
>     def __ge__(self, other):
>         return self.plumage() >= other.plumage()
>
> If the comparison requires a lot of work, I'll do something like this:
>
> class Aardvark:
>     def __le__(self, other):
>         return lots_of_work(self, other)
>     def __gt__(self, other):
>         return not self <= other
>     # etc.
>
> But I can't help feeling that there is a better way. What do others do?

Typically, I write only two kinds of classes that use comparion
operators: (1) ones that can get by with __cmp__ and (2) ones that
define __eq__ and __ne__ without any of the other four.

But for your case, I'd say you're doing it the right way.  If you
define a lot of classes like Parrot, you might want to try moving the
six operators to a common base class:

class Comparable:
    """
    Abstract base class for classes using rich comparisons.
    Objects are compared using their cmp_key() method.
    """
    def __eq__(self, other):
        return (self is other) or (self.cmp_key() == other.cmp_key())
    def __ne__(self, other):
        return (self is not other) and (self.cmp_key() !=
other.cmp_key())
    def __lt__(self, other):
        return self.cmp_key() < other.cmp_key()
    def __le__(self, other):
        return self.cmp_key() <= other.cmp_key()
    def __gt__(self, other):
        return self.cmp_key() > other.cmp_key()
    def __ge__(self, other):
        return self.cmp_key() >= other.cmp_key()
    def cmp_key(self):
        """Overriden by derived classes to define a comparison key."""
        raise NotImplementedError()

class Parrot(Comparable):
    def cmp_key(self):
        return self.plumage()
    # ...



From tiedon_jano at hotmail.com  Wed Jan  3 11:23:28 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Wed, 03 Jan 2007 16:23:28 GMT
Subject: array of class / code optimization
In-Reply-To: <6UPmh.6785$hr3.92@newsfe24.lga>
References: <mailman.2221.1167763760.32031.python-list@python.org>
	<AOPmh.83$9v1.124@nntpserver.swip.net>
	<6UPmh.6785$hr3.92@newsfe24.lga>
Message-ID: <4MQmh.145$jr6.14@read3.inet.fi>

hg kirjoitti:
> mm wrote:
> 
>> Yes, it was the (), equivalent to thiks like new() create new object
>> from class xy.
>>>   s1.append(Word)
>> s1.append(Word())
>>
>> But I was looking for a "struct" equivalent like in c/c++.
>> And/or "union". I can't find it.
>>
>> Maybe you know a source (URL) "Python for c/c++ programmers" or things
>> like that.
>>
>>
>> Yes, I konw whats an object is...
> 
> 
> A struct in C is unrelated to a struct in C++ as a struct in C++ _is_ a
> class.
> 
> 
> hg
> 

What does your sentence mean, exactly? If I take a C file xyz.c 
containing a struct definition S, say, rename it to be xyz.cpp and feed 
it to a C++ compiler, the S sure remains a struct and the C++ compiler 
has no difficulty in handling it as a struct, so ?!?

Cheers,
Jussi


From erick.lavoie at gmail.com  Mon Jan 22 18:26:21 2007
From: erick.lavoie at gmail.com (=?ISO-8859-1?Q?Lavoie_=C9rick?=)
Date: Mon, 22 Jan 2007 18:26:21 -0500
Subject: How to get self reference from within a module?
Message-ID: <3ca9bbe50701221526p4bb7cffdx767d6737bed0a6a2@mail.gmail.com>

Hi,

 i would like to now how to get a self reference from within a module.  The
goal is to be able to generate a list of all declared function within the
module.

Thanks,

Erick
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070122/9b9665ed/attachment.html>

From mike.klaas at gmail.com  Mon Jan  8 15:05:16 2007
From: mike.klaas at gmail.com (Klaas)
Date: 8 Jan 2007 12:05:16 -0800
Subject: Traceback of hanged process
In-Reply-To: <mailman.2377.1168125259.32031.python-list@python.org>
References: <mailman.2377.1168125259.32031.python-list@python.org>
Message-ID: <1168286710.482272.33770@11g2000cwr.googlegroups.com>

Hynek Hanke wrote:
> Hello,
>
> please, how do I create a pythonic traceback from a python process that
> hangs and is not running in an interpreter that I executed manually
> or it is but doesn't react on CTRL-C etc? I'm trying to debug a server
> implemented in Python, so I need some analog of 'gdb attach' for C.
>
> Unfortunatelly, googling and reading documentation revealed nothing, so
> please excuse if this question is dumb.

In python2.5, you can run a background thread that listens on a port or
unix socket, and prints a formatted version of sys._current_frames() to
stderr.  

-Mike



From steve at holdenweb.com  Tue Jan 30 00:26:59 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 30 Jan 2007 05:26:59 +0000
Subject: Ip address
In-Reply-To: <g3pu84-b0l.ln1@ophelia.g5n.co.uk>
References: <mailman.3244.1169978684.32031.python-list@python.org>	<1169990510.352536.4760@a34g2000cwb.googlegroups.com>	<mailman.3247.1169993423.32031.python-list@python.org>
	<g3pu84-b0l.ln1@ophelia.g5n.co.uk>
Message-ID: <epmkuv$c7c$1@sea.gmane.org>

Toby A Inkster wrote:
> Steve Holden wrote:
> 
>> There is absolutely no need to know the IP address of "your router" to 
>> communicate with Internet devices. Either your IP layer is configured to 
>> know the addresses of one or more routers, or it has discovered those 
>> address by dynamic means, or you can't get off-net because there aren't 
>> any routers.
> 
> ... or you can't get off-net because you don't *know* the routers.
> 
What I know or don't know makes absolutely no difference to whether my 
computer can reach the Internet, it's a matter of whether the IP layes 
is configured to know the appropriate address to which it can hand off 
non-local traffic.

If you are trying to say that it's necessary to know the IP address of 
the routers in order to select a specific interface address from the 
available choices as "the Internet interface" then kindly say so and 
stop wallowing in semantic obscurity.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From nanjundi at gmail.com  Mon Jan 15 20:09:12 2007
From: nanjundi at gmail.com (Nanjundi)
Date: 15 Jan 2007 17:09:12 -0800
Subject: for v in l:
References: <mailman.2759.1168908488.32031.python-list@python.org>
Message-ID: <1168909752.262132.134390@q2g2000cwa.googlegroups.com>

Try:
l = [i+x for i in l]
OR
l = map(lambda i: i+x, l)

-N

Gert Cuykens wrote:
> is there a other way then this to loop trough a list and change the values
>
>         i=-1
>         for v in l:
>                 i=i+1
>                 l[i]=v+x
>
> something like
> 
>         for v in l:
>                 l[v]=l[v]+x



From fredrik at pythonware.com  Thu Jan  4 07:18:05 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 4 Jan 2007 13:18:05 +0100
Subject: pow() works but sqrt() not!?
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de><1167899693.759071.51450@31g2000cwt.googlegroups.com>
	<enig9a$cncb$1@zam602.zam.kfa-juelich.de>
Message-ID: <enir9t$1bn$1@sea.gmane.org>

"siggi" wrote:

> Nope, I did not! But I used sqrt(9), and not math.sqrt(9). The latter works
> excellent, thank you! From now on, I will use "import math" and
> "math.fuction()" for EVERY mathematical function, even for pow() etc. just
> to be on the safe side!

pow and math.pow are two slightly different things, though.  pow() works on
any type that supports power-of operations (via the __pow__ hook), while
math.pow treats everything as a 64-bit float:

>>> math.pow(2, 200)
1.6069380442589903e+060

>>> pow(2, 200)
1606938044258990275541962092341162602522202993782792835301376L

pow also takes a third modulo argument (pow(x,y,z) is equivalent to pow(x,y) % z,
but can be implemented more efficiently for certain data types).

</F> 





From bthate at gmail.com  Tue Jan 30 07:01:28 2007
From: bthate at gmail.com (bthate)
Date: 30 Jan 2007 04:01:28 -0800
Subject: ANN: gozerbot IRC and JABBER bot
Message-ID: <1170158487.843544.124070@l53g2000cwa.googlegroups.com>

gozerbot

a python irc and jabber bot

see http://code.google.com/p/gozerbot

you need:

    * a shell
    * python 2.4 or higher
    * if you want mysql support: the py-MySQLdb module
    * if you want jabber support: the xmpppy module

why gozerbot?

    * user management by userhost
    * fleet .. use more than one bot in a program
    * relaying between fleet bots
    * use the bot through dcc chat
    * fetch rss feeds.
    * keep todo and shop lists
    * karma
    * quote
    * remember items
    * program your own plugins
    * builtin webserver
    * collective, run commands on other bots using their webserver
    * other stuff

we are on channel #dunkbots on IRCnet .. try irc.xs4all.nl



From firefoxxer at gmail.com  Fri Jan 12 18:23:46 2007
From: firefoxxer at gmail.com (Coby)
Date: 12 Jan 2007 15:23:46 -0800
Subject: How to respond to a confirmation prompt automatically
In-Reply-To: <87d55j50x4.fsf@smsnet.pl>
References: <1168632324.226733.130870@a75g2000cwd.googlegroups.com>
	<87d55j50x4.fsf@smsnet.pl>
Message-ID: <1168644224.673196.186730@l53g2000cwa.googlegroups.com>

Thanks Rob.


Rob Wolfe wrote:
> "Coby" <firefoxxer at gmail.com> writes:
>
> > Just to give you some background about my problem:
> >
> > I execute os.system(command), where command is a string.
> >
> > On the command line in windows, I get:
> >
> > "Continue, and unload these objects? [no]"
> >
> > I need to respond 'y' to continue, but I am uncertain on how to output
> > the 'y' automatically.
>
> You need to use pipe.
>
> 1.
>
> p = os.popen(command, "w")
> p.write("y\n")
>
> http://docs.python.org/lib/os-newstreams.html#os-newstreams
>
> 2.
>
> from subprocess import Popen, PIPE
> p = Popen(command, shell=True, stdin=PIPE)
> p.stdin.write("y\n")
>
> http://docs.python.org/lib/module-subprocess.html
> 
> -- 
> HTH,
> Rob



From albert.wellens at gmail.com  Tue Jan 16 17:17:51 2007
From: albert.wellens at gmail.com (awel)
Date: 16 Jan 2007 14:17:51 -0800
Subject: Check a windows service
In-Reply-To: <1168967374.568967.173690@11g2000cwr.googlegroups.com>
References: <1168966952.965088.17740@l53g2000cwa.googlegroups.com>
	<1168967374.568967.173690@11g2000cwr.googlegroups.com>
Message-ID: <1168985871.686464.198120@v45g2000cwv.googlegroups.com>

Sorry, but could you give me an example with a real service 'cause I've
tried this script but nothings happened, no error, nothings ; even if I
launch it in cmd prompt.

Thanks

Tim Golden a ?crit :
> awel wrote:
>
> > I'm new in python and I would like to know if it's possible to check if
> > a specific windows service is present and if it's possible how can I
> > do?
>
> This is one way:
>
> http://tgolden.sc.sabren.com/python/wmi_cookbook.html#automatic_services
>
> You'd have to change that example slightly, but I
> hope the principal is clear enough. If not, ask again.
> 
> TJG



From harvey.thomas at informa.com  Tue Jan 16 08:55:25 2007
From: harvey.thomas at informa.com (harvey.thomas at informa.com)
Date: 16 Jan 2007 05:55:25 -0800
Subject: re.sub and empty groups
References: <mailman.2773.1168952918.32031.python-list@python.org>
Message-ID: <1168955722.605022.268870@m58g2000cwm.googlegroups.com>


Hugo Ferreira wrote:

> Hi!
>
> I'm trying to do a search-replace in places where some groups are
> optional... Here's an example:
>
> >> re.match(r"Image:([^\|]+)(?:\|(.*))?", "Image:ola").groups()
> ('ola', None)
>
> >> re.match(r"Image:([^\|]+)(?:\|(.*))?", "Image:ola|").groups()
> ('ola', '')
>
> >> re.match(r"Image:([^\|]+)(?:\|(.*))?", "Image:ola|ole").groups()
> ('ola', 'ole')
>
> The second and third results are right, but not the first one, where
> it should be equal to the second (i.e., it should be an empty string
> instead of None). This is because I want to use re.sub() and when the
> group is None, it blows up with a stack trace...
>
> Maybe I'm not getting the essence of groups and non-grouping groups.
> Someone care to explain (and, give the correct solution :)) ?
>
> Thanks in advance,
>
> Hugo Ferreira
>
> --
> GPG Fingerprint: B0D7 1249 447D F5BB 22C5  5B9B 078C 2615 504B 7B85

>From the documentation:
groups( [default])
Return a tuple containing all the subgroups of the match, from 1 up to
however many groups are in the pattern. The default argument is used
for groups that did not participate in the match; it defaults to None.

Your second group is optional and does not take part in the match in
your first example. You can, however, still use this regular expression
if you use groups('') rather than groups().

A better way probably is to use a simplified regular expression

re.match(r"Image:([^\|]+)\|?(.*)", "Image:ola").groups()

i.e. match the text "Image:" followed by at least one character not
matching "|" followed by an optional "|" followed by any remaining
characters.



From sickcodemonkey at gmail.com  Tue Jan 30 10:18:40 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Tue, 30 Jan 2007 10:18:40 -0500
Subject: Synchronous shutil.copyfile()
In-Reply-To: <4e8efcf50701300705v2b787ec4h1c539cab8068d58c@mail.gmail.com>
References: <4e8efcf50701300705v2b787ec4h1c539cab8068d58c@mail.gmail.com>
Message-ID: <2adc542f0701300718u1ab0a686i3e91ef85c00a543d@mail.gmail.com>

First off, I am just learning Python, so if there is a more efficient way to
do this, then I am all ears....   (NOTE:  The code below is something that I
was messing with to learn threads...  So some functionality is not
applicable for your needs..I just wanted to show you a demonstration)
One way that you could get around this, is to use threads.   You can lock
your thread and when the lock has been released, you could open it and
ensure your copy has succeeded.  Just a thought....
~~~~~~~~~~~~~~~~~~~~~~~
import thread
def counter(myId, count):
 for i in range(count):
    stdoutmutex.acquire()
    #Copy Your File Here
    stdoutmutex.release()
 exitmutexes[myId].acquire()


stdoutmutex = thread.allocate_lock()
exitmutexes = []
for i in range(2):
   exitmutexes.append(thread.allocate_lock())
   thread.start_new(counter, (i, 2))

for mutex in exitmutexes:
   while not mutex.locked():
       #Open Your File Here

print 'Exiting'



On 1/30/07, Hugo Ferreira <bytter at gmail.com> wrote:
>
> Hi there,
>
> I have a problem. I'm using calling shutil.copyfile() followed by
> open(). The thing is that most of the times open() is called before
> the actual file is copied. I don't have this problem when doing a
> step-by-step debug, since I give enough time for the OS to copy the
> file, but at run-time, it throws an exception.
>
> Is there anyway to force a sync copy of the file (make python wait for
> the completion)?
>
> Thanks in advance!
>
> Hugo Ferreira
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070130/d532fd94/attachment.html>

From scott.daniels at acm.org  Sun Jan 14 00:16:12 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sat, 13 Jan 2007 21:16:12 -0800
Subject: Comparing a matrix (list[][]) ?
In-Reply-To: <1168735426.313475.212710@11g2000cwr.googlegroups.com>
References: <1168730648.038901.187460@v45g2000cwv.googlegroups.com>
	<eobrm4$p68$1@cernne03.cern.ch>
	<1168735426.313475.212710@11g2000cwr.googlegroups.com>
Message-ID: <45a9b1d2$1@nntp0.pdx.net>

bearophileHUGS at lycos.com wrote:
> mat = [[9, 8,  12, 15], ..., [0,  0,  0,  5]]
> 
> print min(el for row in mat for el in row if el > 0)
> ...
> If the OP needs the position he/she can do something like:
    << iterative solution >>

Or you can still use min by keeping the position after the value:

     value, x_pos, y_pos = min( (elem, x, y)
                                for y, row in enumerate(mat)
                                    for x, elem in enumerate(row)
                                        if elem > 0 )

You get the "first" entry with the minimal value.
This code raises ValueError if all entries of mat are <= 0.

--Scott David Daniels
scott.daniels at acm.org


From fumanchu at amor.org  Sat Jan 20 15:58:54 2007
From: fumanchu at amor.org (fumanchu)
Date: 20 Jan 2007 12:58:54 -0800
Subject: confused on python rpc with apache, is it possible?
References: <mailman.2912.1169227938.32031.python-list@python.org>
	<51ce8uF1k0tl5U1@mid.uni-berlin.de>
	<mailman.2931.1169273350.32031.python-list@python.org>
	<1169276359.477277.17930@q2g2000cwa.googlegroups.com>
	<mailman.2945.1169309537.32031.python-list@python.org>
	<51etfpF1kappuU1@mid.uni-berlin.de>
	<mailman.2949.1169320005.32031.python-list@python.org>
Message-ID: <1169326734.140275.49660@a75g2000cwd.googlegroups.com>

krishnakant Mane wrote:
> can I do xml-rpc using the default libraries that come with every
> python installer?

You can, but others have packaged them up to make it easier. CherryPy
includes an xmlrpc tool (and has no dependencies other than standard
Python).

You can see an example of what your code would look like in the
"setup_server" portion of
http://www.cherrypy.org/browser/trunk/cherrypy/test/test_xmlrpc.py

Further resources on using CherryPy's xml-rpc are just a Google away.
Note that some of these may use different syntax as they target
different versions of CherryPy (but the basics are the same).
http://www.google.com/search?q=cherrypy+xmlrpc


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org



From leonel.gayard at gmail.com  Thu Jan  4 15:11:39 2007
From: leonel.gayard at gmail.com (leonel.gayard at gmail.com)
Date: 4 Jan 2007 12:11:39 -0800
Subject: A python library to convert RTF into PDF ?
In-Reply-To: <mailman.2252.1167853706.32031.python-list@python.org>
References: <1167846487.943390.192130@a3g2000cwd.googlegroups.com>
	<5stnp25m2uffc4n5k7g9e68hk2l85u4fmm@4ax.com>
	<1167850322.373355.327020@s34g2000cwa.googlegroups.com>
	<mailman.2252.1167853706.32031.python-list@python.org>
Message-ID: <1167941499.204931.99010@42g2000cwt.googlegroups.com>

> Why not use OO.org to convert DOC to PDF? It does so natively, IIRC.

I can't insert variables if the template is a DOC file. This is why we
are using RTF.


Felipe Almeida Lessa wrote:
> On 3 Jan 2007 10:52:02 -0800, leonel.gayard at gmail.com
> <leonel.gayard at gmail.com> wrote:
> > I have tried to
> > convert them to tex using OpenOffice, but the result is ugly as hell.
>
> Why not use OO.org to convert DOC to PDF? It does so natively, IIRC.
> 
> -- 
> Felipe.



From paddy3118 at netscape.net  Wed Jan 10 14:28:56 2007
From: paddy3118 at netscape.net (Paddy)
Date: 10 Jan 2007 11:28:56 -0800
Subject: An iterator with look-ahead
In-Reply-To: <slrneqaauk.gk.horpner@FIAD06.norwich.edu>
References: <slrneq9ubo.bg.horpner@FIAD06.norwich.edu>
	<dMqdnTbhALKBgzjYnZ2dnUVZ_oupnZ2d@comcast.com>
	<slrneqaauk.gk.horpner@FIAD06.norwich.edu>
Message-ID: <1168457336.695589.127030@77g2000hsv.googlegroups.com>


Neil Cerutti wrote:

> On 2007-01-10, Steven Bethard <steven.bethard at gmail.com> wrote:
> > Neil Cerutti wrote:
> >> For use in a hand-coded parser I wrote the following simple
> >> iterator with look-ahead.
> >
> > There's a recipe for this:
> >
> >    http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/304373
> >
> > Note that the recipe efficiently supports an arbitrary
> > look-ahead, not just a single item.
> >
> >> I haven't thought too deeply about what peek ought to return
> >> when the iterator is exhausted. Suggestions are respectfully
> >> requested.
> >
> > In the recipe, StopIteration is still raised on a peek()
> > operation that tries to look past the end of the iterator.
>
> That was all I could think of as an alternative, but that makes
> it fairly inconvenient to use. I guess another idea might be to
> allow user to provide a "no peek" return value in the
> constructor, if they so wish.
>
> --
> Neil Cerutti
You could raise a different Exception, PeekPastEndEception ?
- Paddy.



From Thomas.Ploch at gmx.net  Tue Jan  9 01:55:08 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Tue, 09 Jan 2007 07:55:08 +0100
Subject: How to write temporary data to file?
In-Reply-To: <1168324907.803841.79020@42g2000cwt.googlegroups.com>
References: <mailman.2461.1168316179.32031.python-list@python.org>
	<1168324907.803841.79020@42g2000cwt.googlegroups.com>
Message-ID: <45A33C4C.30203@gmx.net>

Ravi Teja schrieb:
> Thomas Ploch wrote:
>> Hi folks,
>>
>> I have a data structure that looks like this:
>>
>> d = {
>> 	'url1': {
>> 		'emails': ['a', 'b', 'c',...],
>> 		'matches': ['d', 'e', 'f',...]
>> 	},
>> 	'url2': {...
>> }
>>
>> This dictionary will get _very_ big, so I want to write it somehow to a
>> file after it has grown to a certain size.
>>
>> How would I achieve that?
>>
>> Thanks,
>> Thomas
> 
> Pickle/cPickle are standard library modules that can persist data.
> But in this case, I would recommend ZODB/Durus.
> 
> (Your code example scares me. I hope you have benevolent purposes for
> that application.)
> 
> Ravi Teja.
> 

Thanks, but why is this code example scaring you?

Thomas


From nmm1 at cus.cam.ac.uk  Tue Jan  9 13:23:43 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 9 Jan 2007 18:23:43 GMT
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
	<envur1$rq1$1@gemini.csx.cam.ac.uk>
	<mailman.2480.1168350033.32031.python-list@python.org>
	<Xns98B384E126F4Ctim111one@216.196.97.136>
Message-ID: <eo0mjf$i4h$1@gemini.csx.cam.ac.uk>


In article <Xns98B384E126F4Ctim111one at 216.196.97.136>,
Tim Peters <tim.one at comcast.net> writes:
|> 
|> Well, just about any technical statement can be misleading if not qualified 
|> to such an extent that the only people who can still understand it knew it 
|> to begin with <0.8 wink>.  The most dubious statement here to my eyes is 
|> the intro's "exactness carries over into arithmetic".  It takes a world of 
|> additional words to explain exactly what it is about the example given (0.1 
|> + 0.1 + 0.1 - 0.3 = 0 exactly in decimal fp, but not in binary fp) that 
|> does, and does not, generalize.  Roughly, it does generalize to one 
|> important real-life use-case:  adding and subtracting any number of decimal 
|> quantities delivers the exact decimal result, /provided/ that precision is 
|> set high enough that no rounding occurs.

Precisely.  There is one other such statement, too: "Decimal numbers can
be represented exactly."  What it MEANS is that numbers with a short
representation in decimal can be represented exactly in decimal, which
is tautologous, but many people READ it to say that numbers that they
are interested in can be represented exactly in decimal.  Such as pi,
sqrt(2), 1/3 and so on ....

|> > and how is decimal no better than binary?
|> 
|> Basically, they both lose info when rounding does occur.  For example,

Yes, but there are two ways in which binary is superior.  Let's skip
the superior 'smoothness', as being too arcane an issue for this group,
and deal with the other.  In binary, calculating the mid-point of two
numbers (a very common operation) is guaranteed to be within the range
defined by those numbers, or to over/under-flow.

Neither (x+y)/2.0 nor (x/2.0+y/2.0) are necessarily within the range
(x,y) in decimal, even for the most respectable values of x and y.
This was a MAJOR "gotcha" in the days before binary became standard,
and will clearly return with decimal.



Regards,
Nick Maclaren.


From skip at pobox.com  Thu Jan 25 09:33:19 2007
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 25 Jan 2007 08:33:19 -0600
Subject: Python does not play well with others
In-Reply-To: <1169726842.719104.304300@v45g2000cwv.googlegroups.com>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
	<1169726842.719104.304300@v45g2000cwv.googlegroups.com>
Message-ID: <17848.49071.20916.590158@montanaro.dyndns.org>

    Paul> .... We all know that the Python language has issues (or "warts"
    Paul> as they are popularly called), although some of the most notable
    Paul> ones don't seem to have been addressed as yet in the plans for
    Paul> Python 3000 (eg. default argument evaluation), but some of the
    Paul> most awkward aspects of using Python involve libraries, not some
    Paul> deficiency of the language....

I think EasyInstall might have some role to play in improving the library
status quo.  Consider the cgi module.  It was originally written in probably
1995 or earlier and for a long time was the only game in town.
Consequently, lots of applications used it.  Times have changed though and
there's a whole new alphabet soup of web application frameworks available.
I installed Pylons the other day with "easy_install pylons".  No fuss, no
muss.  Over time (maybe in Python 3) modules like cgi, which arguably no
longer belong in the core can be maintained externally and installed only
when needed.

Skip


From fredrik at pythonware.com  Wed Jan  3 14:10:59 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 03 Jan 2007 20:10:59 +0100
Subject: When argparse will be in the python standard installation
In-Reply-To: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>
References: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>
Message-ID: <engv43$heu$1@sea.gmane.org>

PengYu.UT at gmail.com wrote:

> I feel argparse has some useful things that optparse doesn't have. But
> I can't find it argparse in python library reference. I'm wondering
> when it will be available in the python standard installation.

there's already two different option parsing modules in the standard 
library.  maybe improving one of the existing ones might be a better 
idea than adding a third one?

</F>



From mail at microcorp.co.za  Tue Jan  9 00:58:56 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 9 Jan 2007 07:58:56 +0200
Subject: Execute binary code
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com><EOSdneXxmrS6OT_YnZ2dnUVZ_q7inZ2d@comcast.com><1168289145.319706.199950@11g2000cwr.googlegroups.com><4866bea60701081251we2bf7f3vb55a285ee20e91f6@mail.gmail.com>
	<4866bea60701081252o3acf0470x4607613961da7b5e@mail.gmail.com>
Message-ID: <021901c733c8$3fe20000$03000080@hendrik>


 "Chris Mellon" <arkanes at gmail.com> wrote:


> <sigh> Repost. Is there any chance at all that ML could set the
> reply-to to the list instead of the sender?

+1 

- I regularly hit "reply all", delete the OP, and then I get :

"Message has a suspicious header"

- Hendrik




From gagsl-py at yahoo.com.ar  Mon Jan 15 19:02:35 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 15 Jan 2007 21:02:35 -0300
Subject: Problem with win32pipe.popen2
In-Reply-To: <1168856689.749595.74440@q2g2000cwa.googlegroups.com>
References: <1168856689.749595.74440@q2g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070115204043.05c85860@yahoo.com.ar>

At Monday 15/1/2007 07:24, diego wrote:

>I'm trying to understand how popen2 works. Found in this group, that
>popen2.popen2 can cause trouble so i chose win32pipe.popen2.
>
>have a look a the listing of 2 files:
>ekmain.py:
>**************
>import win32pipe
>
>(stdin1, stdout1) = win32pipe.popen2("test1.py")
>stdin1.write("1\n")
>print stdout1.readlines() # This will print the result.
>**************
>
>test1.py:
>**************
>a=raw_input("a=")
>print "***a=",a
>print "finished!"
>**************
>
>
>i do not understand, why ekmain.py produces only following output:
>['a=']
>
>why is the stdin1.write("1\n") command ignored?

Using popen4 instead of popen2 we get stderr too, and there is a traceback:
['a=Traceback (most recent call last):\n', '  File 
"C:\\TEMP\\test1.py", line 1,
  in ?\n', '    a=raw_input("a=")\n', 'EOFError: EOF when reading a line\n']

Using "python test1.py" as the popen4 argument we get the expected result:

C:\TEMP>main.py
['a=***a= 1\n', 'finished!\n']

(I don't know why)

>p.s.: i working with python 2.3 on win2000.

I used 2.4 on XPSP2.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From nmm1 at cus.cam.ac.uk  Mon Jan  8 13:39:15 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 8 Jan 2007 18:39:15 GMT
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk>
	<entkru$2vs$1@gemini.csx.cam.ac.uk>
	<50f5snF1fb5uqU2@mid.individual.net>
	<entpo0$d0g$1@gemini.csx.cam.ac.uk>
	<mailman.2425.1168272626.32031.python-list@python.org>
	<enttq6$lj2$1@gemini.csx.cam.ac.uk>
	<1168277798.302236.184180@s34g2000cwa.googlegroups.com>
	<enu0pu$rj0$1@gemini.csx.cam.ac.uk>
	<1168280213.382178.228020@11g2000cwr.googlegroups.com>
Message-ID: <enu34j$2lj$1@gemini.csx.cam.ac.uk>


In article <1168280213.382178.228020 at 11g2000cwr.googlegroups.com>,
"Ziga Seilnacht" <ziga.seilnacht at gmail.com> writes:
|> 
|> There was a recent bug report identical to your complaints, which
|> was closed as invalid. The rationale for closing it was that things
|> like:
|> 
|> print ("a, bc", "de f,", "gh), i")
|> 
|> would be extremely confusing if the current behaviour was changed. See
|> http://www.python.org/sf/1534769
|> for details.

Well, I wasn't complaining - merely querying.

If this approach is taken, it would be better to document it, so that
authors of derived classes follow the convention.


Regards,
Nick Maclaren.


From tew24 at spam.ac.uk  Fri Jan 19 05:57:37 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Fri, 19 Jan 2007 10:57:37 +0000
Subject: How to find out if another process is using a file
References: <eoo6vd$33u$1@gemini.csx.cam.ac.uk>
	<mailman.2875.1169138635.32031.python-list@python.org>
Message-ID: <eoq871$8dt$1@gemini.csx.cam.ac.uk>

js  wrote:
> How about using lock?
> Let writing process locks the files before writing, and unlock after
> the job's done.

Is locking mandatory or co-operative? I don't have any control over the
process which is doing the writing, so if it's co-operative it's no good to
me.

If it's mandatory, then I can try to acquire a lock on the file - if this
fails or blocks, then the other process must have it open.  Will this work?


From gagsl-py at yahoo.com.ar  Tue Jan 23 21:15:30 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 23 Jan 2007 23:15:30 -0300
Subject: Simple Matrix class
In-Reply-To: <1169602411.917985.89840@l53g2000cwa.googlegroups.com>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>
	<mailman.3049.1169600368.32031.python-list@python.org>
	<1169602411.917985.89840@l53g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070123225155.01be96d8@yahoo.com.ar>

At Tuesday 23/1/2007 22:33, Paul McGuire wrote:

>On Jan 23, 6:59 pm, Robert Kern <robert.k... at gmail.com> wrote:
> > Paul McGuire wrote:
> > > I've posted a simple Matrix class on my website as a small-footprint
> > > package for doing basic calculations on matrices up to about 10x10 in
> > > size (no theoretical limit, but performance on inverse is exponential).
> >
> > Why is that? A simple and robust LU decomposition should be no 
> more than O(n**3).
> >
>
>Well "3" is an exponent isn't it? :)

But constant!
x**2 is a "power" (or quadratic, or polynomial) function. 2**x is an 
"exponential" function. They're quite different.

>In truth, in my laziness, I didn't *actually* test the performance.
>But after measuring inversion times for nxn matrices for n=2 to 12, I
>get these results (run on Python 2.4.2, on a 2GHz CPU):
>
>n  seconds                ln(seconds)
>2 0.000411225449045 -7.79636895604
>3 0.00102247632031 -6.88552782893
>4 0.00437541642862 -5.43175358002
>5 0.0146999129778 -4.21991370509
>6 0.0507813143849 -2.98022681913
>7 0.143077961026 -1.94436561528
>8 0.39962257773 -0.917234732978
>9 1.14412558021 0.134640659841
>10 3.01953516439 1.10510290046
>11 8.76039971561 2.17024153354
>12 21.8032182861 3.0820575867
>
>Plotting n vs. ln(seconds) gives a fairly straight line of slope about
>1.09, and exp(1.09) = 2.97, so your big-O estimate seems to line up
>nicely with the experimental data - I couldn't have fudged it any
>better.

Nope, such semilog plot shows that time grows exponentially, like 
t=3*exp(n), and that's really bad! :(
The points should be aligned on a log-log plot to be a power function.
As Robert Kern stated before, this problem should be not worse than 
O(n**3) - how have you implemented it?


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From jdvolz at gmail.com  Mon Jan  8 19:30:03 2007
From: jdvolz at gmail.com (jdvolz at gmail.com)
Date: 8 Jan 2007 16:30:03 -0800
Subject: Network failure when using urllib2
In-Reply-To: <1168301738.984509.3030@38g2000cwa.googlegroups.com>
References: <1168292352.349983.139260@i15g2000cwa.googlegroups.com>
	<1168301738.984509.3030@38g2000cwa.googlegroups.com>
Message-ID: <1168302603.565442.113760@v33g2000cwv.googlegroups.com>

I am fetching different web pages (never the same one) from a web
server.  Does that make a difference with them trying to block me?
Also, if it was only that site blocking me, then why does the internet
not work in other programs when this happens in the script.  It is
almost like something is seeing a lot of traffic from my computer, and
cutting it off thinking it is some kind of virus or worm.  I am
starting to suspect my firewall.  Anyone else have this happen?

I am going to read over that documentation you suggested to see if I
can get any ideas.  Thanks for the link.

Shuad

On Jan 8, 4:15 pm, "Ravi Teja" <webravit... at gmail.com> wrote:
> jdv... at gmail.com wrote:
> > I have a script that uses urllib2 to repeatedly lookup web pages (in a
> > spider sort of way).  It appears to function normally, but if it runs
> > too long I start to get 404 responses.  If I try to use the internet
> > through any other programs (Outlook, FireFox, etc.) it will also fail.
> > If I stop the script, the internet returns.
>
> > Has anyone observed this behavior before?  I am relatively new to
> > Python and would appreciate any suggestions.
>
> > ShuadI am assuming that you are fetching the full page every little while.
> You are not supposed to do that. The admin of the web site you are
> constantly hitting probably configured his server to block you
> temporarily when that happens. But don't feel bad :-). This is a common
> Beginners mistake.
>
> Read here on the proper way to do this.http://diveintopython.org/http_web_services/review.html
> especially 11.3.3. Last-Modified/If-Modified-Since in the next page
> 
> Ravi Teja.



From guettli.usenet at thomas-guettler.de  Mon Jan 22 10:47:32 2007
From: guettli.usenet at thomas-guettler.de (Thomas Guettler)
Date: 22 Jan 2007 15:47:32 GMT
Subject: OpenOffice 2.0 UNO update Links; need help
References: <mailman.2968.1169424837.32031.python-list@python.org>
Message-ID: <51k4kkF1krq1vU1@mid.individual.net>

Sells, Fred wrote:

> I've got a ~100 page document I assemble from ~30 OOo .odt files with some
> search and replace functions.  I then produce a PDF.  So far so good.
>
> Now I need to get a barcode from our internal website and insert that.  The
> barcode will vary based on some parameters.  Our internal site provides a
> .jpg image (or .gif) based on those parameters.

You can use pdftk to insert the barcode into the pdf.
(No python and OOo involved)

I think it is a very bad idea to use a jpg for the barcode. There
are many libaries which provide EPS. If you need an image format,
please use PNG. Jpeg is for images from a digital camera.

 Thomas


-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From thinker at branda.to  Tue Jan 30 03:39:30 2007
From: thinker at branda.to (Thinker)
Date: Tue, 30 Jan 2007 16:39:30 +0800
Subject: Conversion of string to integer
In-Reply-To: <1170078933.180025.229830@k78g2000cwa.googlegroups.com>
References: <1170078933.180025.229830@k78g2000cwa.googlegroups.com>
Message-ID: <45BF0442.30503@branda.to>

jupiter wrote:
> Hi guys,
>
> I have a problem. I have a list which contains strings and numeric. 
> What I want is to compare them in loop, ignore string and create 
> another list of numeric values.
>
> I tried int() and decimal() but without success.
>
> eq of problem is
>
> #hs=string.split(hs)
> hs =["popopopopop","254.25","pojdjdkjdhhjdccc","25452.25"]
>   
hs = [.............]

import re
reo = re.compile(r'^[0-9]+(\.[0-9]+)?$')
result = [e for e in hs if reo.match(e)]



-- 
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py



From jstroud at mbi.ucla.edu  Tue Jan 16 18:22:39 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 16 Jan 2007 15:22:39 -0800
Subject: Making a simple script standalone
In-Reply-To: <5d1084-5j7.ln1@whisper.very.softly>
References: <5d1084-5j7.ln1@whisper.very.softly>
Message-ID: <eojmnv$18p$1@zinnia.noc.ucla.edu>

Rikishi 42 wrote:
> Hi,
> I'm new to this group. I've tried finding my answer in existing messages,
> but no such luck.
> 
> What I want to do is to compile/bundle/prepare/whatever_term a simple
> Python script for deployment on a Windows machine. Installing Python
> itself on that machine, is not an option. Ideally I would like to obtain
> a single executable file, but a script+runtime is acceptable.
> 
> There is nothing graphical, nothing fancy about the script.
> The only imports are: os, stat, string and time.
> 
> 
> Any suggestions on an - easy and clear - path to follow ?


pyinstaller + innosetup.

James


From john at baumanfamily.com  Mon Jan 15 19:15:13 2007
From: john at baumanfamily.com (John Bauman)
Date: Mon, 15 Jan 2007 19:15:13 -0500
Subject: How naive is Python?
In-Reply-To: <mailman.2735.1168879589.32031.python-list@python.org>
References: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>	<mailman.2724.1168834095.32031.python-list@python.org>	<1168848408.785931.285160@q2g2000cwa.googlegroups.com>	<17835.39437.115750.617750@montanaro.dyndns.org>
	<mailman.2735.1168879589.32031.python-list@python.org>
Message-ID: <lgCdnbEDrriLhDHYUSdV9g@ptd.net>

skip at pobox.com wrote:
> Actually, it isn't until I work my way back to 2.3 that I start to see
> quadratic behavior:

Yes, that's because the behavior was changed for 2.4, so it wouldn't be 
quadratic in this case.


From vineeth.rv at gmail.com  Tue Jan 16 05:32:59 2007
From: vineeth.rv at gmail.com (Vineeth  Kashyap)
Date: 16 Jan 2007 02:32:59 -0800
Subject: I wrote a C++ code generator in Python,
	would anyone please help me to review the code? :)
In-Reply-To: <1168930067.970099.164620@s34g2000cwa.googlegroups.com>
References: <1168930067.970099.164620@s34g2000cwa.googlegroups.com>
Message-ID: <1168943577.936249.191040@s34g2000cwa.googlegroups.com>

Hi,
I am interested in your proposal. I am basically a C/C++ programmer,
but recently fell in love with python. Please send more details on
fgen. We could probably start working. :)
Kevin Wan wrote:
> fgen is a free command line tool that facilitates cross platform c++
> development, including header generation, cpp file generation, makefile
> generation, unit test framework generation, etc.
>
> http://sf.net/projects/fgen
>
> I'm not very familiar with Python. Any feedback are appreciated! Or
> anyone like to develop it with me?
> 
> Thanks.



From bj_666 at gmx.net  Thu Jan  4 02:46:58 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 04 Jan 2007 08:46:58 +0100
Subject: code optimization (calc PI) / Full Code of PI calc in Python and
	C.
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
	<459BFDCB.4000503@sschwarzer.net>
	<UGXmh.194$9v1.250@nntpserver.swip.net>
	<1167872076.937415.250340@11g2000cwr.googlegroups.com>
	<cuYmh.201$9v1.239@nntpserver.swip.net>
Message-ID: <pan.2007.01.04.07.46.56.971023@gmx.net>

In <cuYmh.201$9v1.239 at nntpserver.swip.net>, Michael M. wrote:

> * The C is very fast, Python not.
> * Target: Do optimization, that Python runs nearly like C.

As someone else already asked: Why?  You can't beat a compiled to machine
code language with an interpreted one when doing integer arithmetic.

> counter=c
> while 0<=counter+4000:
>    f.append(2000)  #   f.append( int(a/5) )
>    counter=counter-1
>    # b=b+1

Why do you count so complicated here?  It's hard to see that this creates
a list with 2801 elements.

>      d = int(d/g)  ## needs cast to int

Instead of converting the numbers to float by "real" division and then
converting back the result you should do integer division:

  d = d // g

or

  d //= g

>    pi = pi + str("%04d" % int(e + d/a))

The `str()` call is unnecessary.  And again: try to stick to integer
arithmetic with ``//``.

Here is my attempt to convert the C code, not written with speed in mind
and I was too lazy too time it.  :-)

from itertools import izip

def pi():
    result = list()
    d = 0
    e = 0
    f = [2000] * 2801
    for c in xrange(2800, 0, -14):
        for b, g in izip(xrange(c, 1, -1), xrange((c * 2) - 1, 0, -2)):
            d += f[b] * 10000
            h, f[b] = divmod(d, g)
            d = h * b
        h, i = divmod(d, 10000)
        result.append('%.4d' % (e + h))
        e = i
    return ''.join(result)

Ciao,
	Marc 'BlackJack' Rintsch


From theller at ctypes.org  Thu Jan 11 15:13:24 2007
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 11 Jan 2007 21:13:24 +0100
Subject: py2exe: zipfile=None raised ImportError
In-Reply-To: <1168543966.212663.141840@i56g2000hsf.googlegroups.com>
References: <1168543966.212663.141840@i56g2000hsf.googlegroups.com>
Message-ID: <45A69A64.20204@ctypes.org>

(I forgot to copy the list ;-)

Tim schrieb:
> > I'm at the end of my limited experience...
> > 
> > I'm using py2exe to create an executable. I'm using bundle level 1.
> > When I don't use the zipfile option, the executable and library.zip get
> > created and the executable works correctly.
> > 
> > When I add the zipfile=None option to put everything into the exe, the
> > exe doesn't work. It raises an ImportError whose traceback is:
> > 
> > File "...boot_common.py" ... no module name linecache
> > File "<install zipextimporter> ... no module named zipextimporter
> > File "my.py" ... no module name optparse
> > 
> > It looks like the imported modules are not being found in the zip, or
> > something didn't get included that needed to be included.
> > 
> > Does anybody know what's happening and how to fix it?

I have don't know if this helps or not, but you should better clean everything
(remove the build and the dist subdirectories) when you are changing the options in the
setup script and 'recompile'.

Another tip:  You can examine what is in the zipfile, or the exe (if using
zipfile=None) when you rename the file to a *.zip file, and open it with
winzip or another archiver.

Thomas




From stuart at bmsi.com  Tue Jan 16 00:23:35 2007
From: stuart at bmsi.com (Stuart D. Gathman)
Date: Tue, 16 Jan 2007 00:23:35 -0500
Subject: Debugging SocketServer.ThreadingTCPServer
Message-ID: <pan.2007.01.16.05.23.34.541910@bmsi.com>

I have a ThreadingTCPServer application (pygossip, part of 
http://sourceforge.net/projects/pymilter).  It mostly runs well, but
occasionally goes into a loop.  How can I get a stack trace of running
threads to figure out where the loop is?  Is there some equivalent of
sending SIGQUIT to Java to get a thread dump?  If needed, I can import pdb
and set options at startup, but there needs to be some external way of
triggering the dump since I can't reproduce it at will.

-- 
	      Stuart D. Gathman <stuart at bmsi.com>
Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.



From deets at nospam.web.de  Tue Jan  2 09:36:53 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 02 Jan 2007 15:36:53 +0100
Subject: mutable numeric type
In-Reply-To: <459A46A8.3050706@skynet.be>
References: <mailman.2193.1167708425.32031.python-list@python.org>
	<1167735454.604184.110630@i12g2000cwa.googlegroups.com>
	<459A46A8.3050706@skynet.be>
Message-ID: <4vv906F1dkfheU1@mid.uni-berlin.de>

Helmut Jarausch schrieb:
> pgarrone at acay.com.au wrote:
>> Way to go.
>> Try doing this.
>> x = MutableNumeric(42)
>       ^^^^^^^^^^^^^^
> where is this defined?

In the OPs example.

Diez


From gert.cuykens at gmail.com  Mon Jan 15 18:43:08 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Tue, 16 Jan 2007 00:43:08 +0100
Subject: whats wrong with my reg expression ?
In-Reply-To: <7.0.1.0.0.20070115195902.05c75aa0@yahoo.com.ar>
References: <ef60af090701151441j2dbc2308ka8f326a181b6bba8@mail.gmail.com>
	<7.0.1.0.0.20070115195902.05c75aa0@yahoo.com.ar>
Message-ID: <ef60af090701151543m1479689cg462a0f263401e5d1@mail.gmail.com>

thx

PS i also cant figure out what is wrong here ?

        rex=re.compile('^"(?P<value>[^"]*)"$',re.M)
        for v in l:
            v=rex.match(v).group('value')
            v=v.replace('""','"')
        return(l)

    v=rex.match(v).group('value')
AttributeError: 'NoneType' object has no attribute 'group'


From Hieu.D.Hoang at gmail.com  Tue Jan 30 23:21:49 2007
From: Hieu.D.Hoang at gmail.com (Hieu.D.Hoang at gmail.com)
Date: 30 Jan 2007 20:21:49 -0800
Subject: Unicode error handler
In-Reply-To: <mailman.3314.1170174675.32031.python-list@python.org>
References: <epdmae$qps$1@sea.gmane.org>
	<mailman.3314.1170174675.32031.python-list@python.org>
Message-ID: <1170217309.125918.214060@v33g2000cwv.googlegroups.com>

On Jan 30, 11:28 pm, Walter D?rwald <wal... at livinglogic.de> wrote:

>
> codecs.register_error("transliterate", transliterate)
>
>    Walter

Really, really slick solution.
Though, why was it [:1], not [0]? ;-)

And one more thing:
> def transliterate(exc):
>         if not isinstance(exc, UnicodeEncodeError):
>                 raise TypeError("don'ty know how to handle %r" % r)
I don't understand what %r and r are and where they are from. The man
3 printf page doesn't have %r formatting.

Thanks for the tip.
Hieu



From no-spam at no-spam-no-spam.invalid  Thu Jan 11 05:11:51 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 11 Jan 2007 11:11:51 +0100
Subject: Parallel Python
In-Reply-To: <eo3bjj$cen$1@gemini.csx.cam.ac.uk>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<7x8xga215f.fsf@ruckus.brouhaha.com>
	<eo3bjj$cen$1@gemini.csx.cam.ac.uk>
Message-ID: <eo52h9$kad$1@news.albasani.net>

Nick Maclaren wrote:
> In article <7x8xga215f.fsf at ruckus.brouhaha.com>,
> Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> |>
> |> > Yes, I know that it is a bit Irish for the best way to use a shared
> |> > memory system to be to not share memory, but that's how it is.
> |> 
> |> But I thought serious MPI implementations use shared memory if they
> |> can.  That's the beauty of it, you can run your application on SMP
> |> processors getting the benefit of shared memory, or split it across
> |> multiple machines using ethernet or infiniband or whatever, without
> |> having to change the app code.
> 
> They use it for the communication, but don't expose it to the
> programmer.  It is therefore easy to put the processes on different
> CPUs, and get the memory consistency right.
> 

Thus communicated data is "serialized" - not directly used as with threads or with custom shared memory techniques like POSH object sharing.


Robert


From weekender_ny at yahoo.com  Sat Jan 13 15:15:44 2007
From: weekender_ny at yahoo.com (John)
Date: 13 Jan 2007 12:15:44 -0800
Subject: Threaded for loop
Message-ID: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>


I want to do something like this:

for i = 1 in range(0,N):
 for j = 1 in range(0,N):
   D[i][j] = calculate(i,j)

I would like to now do this using a fixed number of threads, say 10
threads.
What is the easiest way to do the "parfor" in python?

Thanks in advance for your help,
--j



From harvey.thomas at informa.com  Thu Jan 18 06:40:55 2007
From: harvey.thomas at informa.com (harvey.thomas at informa.com)
Date: 18 Jan 2007 03:40:55 -0800
Subject: One more regular expressions question
In-Reply-To: <1169117912.193536.321260@a75g2000cwd.googlegroups.com>
References: <1169113767.320500.71200@11g2000cwr.googlegroups.com>
	<eonhct$77p$1@cernne03.cern.ch>
	<1169117912.193536.321260@a75g2000cwd.googlegroups.com>
Message-ID: <1169120455.276931.170810@38g2000cwa.googlegroups.com>

Victor Polukcht wrote:

> My pattern now is:
>
> (?P<var1>[^(]+)(?P<var2>\d+)\)\s+(?P<var3>\d+)
>
> And i expect to get:
>
> var1 = "Unassigned Number "
> var2 = "1"
> var3 = "32"
>
> I'm sure my regexp is incorrect, but can't understand where exactly.
>
> Regex.debug shows that even the first block is incorrect.
>
> Thanks in advance.
>
> On Jan 18, 1:15 pm, Roberto Bonvallet <Roberto.Bonval... at cern.ch>
> wrote:
> > Victor Polukcht wrote:
> > > My actual problem is i can't get how to include space, comma, slash.Post here what you have written already, so we can tell you what the
> > problem is.
> >
> > --
> > Roberto Bonvallet

You are missing \( after the first group. The RE should be:

'(?P<var1>[^(]+)\((?P<var2>\d+)\)\s+(?P<var3>\d+)'



From larry.bates at websafe.com  Tue Jan  9 11:54:24 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 09 Jan 2007 10:54:24 -0600
Subject: Using with CSV library in Python 2.2!!!
In-Reply-To: <1168348224.843657.27330@42g2000cwt.googlegroups.com>
References: <1168348224.843657.27330@42g2000cwt.googlegroups.com>
Message-ID: <-vqdnaYTVsAgVT7YnZ2dnUVZ_ubinZ2d@comcast.com>

mohan wrote:
> Hi Guys,
> 
> I'm back one more basic question, this time on using CSV (Comma
> Seperated Value) library with Python 2.2. At my workplace I have Python
> 2.2 installed and am using PythonWin 2.2.1 IDE from Mark Hammond.
> 
> I want to use the CSV library module for reading data from the .csv
> files and when I try to import the module, I get the error "CSV module
> is not found". The reason, CSV module is missing from the Python root
> directories. Now my first question is,
> 
> 1. Does Python 2.2 come with CSV library module or not? If yes, have I
> lost it somewhere??
> 
> 2. If Python 2.2 does not come with CSV module, is it possible to add
> the CSV module to the Python root and start working??
> 
> 3. If yes, where do I get this module from??
> 
> Would be glad to have an answer for these questions. Thanks in advance.
> 
> Cheers,
> Mohan.
> 
Object Craft wrote the csv library that predated the one released in
Python 2.3.  You can still get it for earlier Python versions here:

http://www.object-craft.com.au/projects/csv/download.html

-Larry


From liberty2777 at yahoo.com  Mon Jan  1 20:26:36 2007
From: liberty2777 at yahoo.com (J. Richards)
Date: Mon, 1 Jan 2007 17:26:36 -0800 (PST)
Subject: HowTo feed AcctName and Password into a website via HTTP
Message-ID: <20070102012636.98394.qmail@web60522.mail.yahoo.com>

I'm doing QA testing of a  WebApp.  First step before crawling the links is to enter  the two  texts mentioned.

Do I extract the login page using: 
import sys, os, urllib, urlparse
Then figure out the HTTP string and then feed that into a HTTP Post ?

Or do I use Forms, CGI or Pamie ??

Whats the best way on Linux?
Whats the best way on Windows.

Thank you.

 __________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070101/82564f68/attachment.html>

From careo at fastmail.fm  Sat Jan 20 03:06:53 2007
From: careo at fastmail.fm (Dane Jensen)
Date: Sat, 20 Jan 2007 00:06:53 -0800
Subject: OT Annoying Habits (Was: when format strings attack)
In-Reply-To: <01bc01c73c5f$75e8cfe0$03000080@hendrik>
References: <mailman.2916.1169240529.32031.python-list@python.org>
	<pan.2007.01.20.02.22.52.492763@REMOVE.THIS.cybersource.com.au>
	<01bc01c73c5f$75e8cfe0$03000080@hendrik>
Message-ID: <200701200006.53698.careo@fastmail.fm>

On Friday 19 January 2007 22:51, Hendrik van Rooyen wrote:
> "Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> wrote:
> > Or perhaps I should say:
> >
> > .snoitnevnoc
> > hsilgnE tpada )ylbissop revenehw( dluohs ew os dna ,naitraM ton
> > ,puorgswen egaugnal hsilgnE na no er'ew ,segaugnal hcus era ereht fi neve
> > tuB
>
> First I thought it was Welsh or Cornish or something.
>
> Then it was like being in my first year of school again-
> reading letter by letter.  Never realised how difficult it is.
>
> I suppose it will improve with practice.

Not to steer this topic even futher off topic, but this is something that's 
been on my mind lately...

The biggest problem with it that the letters were forwards and not also 
backwards (and the parens). But then, it's my understanding that as a 
left-handed person, reading and writing backwards is far easier for me than 
for the majority that is right-handed. Have any other lefties found that the 
case? 

-Dane


From igouy at yahoo.com  Fri Jan 19 22:53:12 2007
From: igouy at yahoo.com (Isaac Gouy)
Date: 19 Jan 2007 19:53:12 -0800
Subject: Py 2.5 on Language Shootout
In-Reply-To: <1169258423.824108.228810@s34g2000cwa.googlegroups.com>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>
	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>
Message-ID: <1169265192.891496.194550@q2g2000cwa.googlegroups.com>


pgarrone at acay.com.au wrote:
> Alioth is a great site for selecting the language in which to implement
> primitives. Usually it's C.

And for selecting a language for which you might need to implement
primitives in C :-)

>
> Two of the alioth benchmarks, Partial-sums and Spectral-norm, could be
> done using Numarray, or would be done with Numarray if most of the
> program was in Python and there was a need to implement a similar
> numerical procedure. The speed would be up near the compiled language
> benchmarks. However the specific wording of these benchmarks prohibits
> this approach. Spectral-norm must pretend the dataset is infinite, and
> Partial-sums has to be implemented in a simple dumb loop.

And we wouldn't use a na?ve recursive algorithm to find fibonnaci
numbers ... unless we were interested in recursion for its own sake.

Maybe the author of spectral-norm was interested in function calls.
Maybe the author of partial-sums was interested in simple dumb loops
and simple dumb Math.


> Looking over the benchmarks, one gains the impression that Python is a
> slow language.

What does that even mean - a slow language?


> My first serious Python programming exercise involved converting a 900
> line Bash Shell program to a 500 line Python program, with a speedup
> factor of 17. Using Python allowed an OO structure and advanced
> containers, meaning the program was more maintainable and portable,
> which were the main aims of the exercise. The speedup was a surprising
> and welcome side benefit. I think it was mosly because the Python
> byte-code interpreter is probably an order of magnitude faster than
> Bash's direct interpretation, and because in Python system calls to
> recurse directories and create symbolic links were not forked to
> separate processes. In fact I would guess that the overall speed of the
> Python program would be little less than a C program, given that most
> of the time would be spent in system calls.

/I would guess/

> Its almost possible to make a large Python program arbitrarily fast by
> profiling it and implementing slow bits as primitives. Size is probably
> of greater concern.

We could read that simply as - /it's not possible/ to make a large
Python program arbitrarily fast. Is that what you meant?



From greg at cosc.canterbury.ac.nz  Tue Jan 30 05:38:45 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Tue, 30 Jan 2007 23:38:45 +1300
Subject: ANN: Pyrex 0.9.5.1
Message-ID: <mailman.3303.1170166195.32031.python-announce-list@python.org>

Pyrex 0.9.5.1 is now available:

   http://www.cosc.canterbury.ac.nz/~greg/python/Pyrex/

This is a minor release to fix a few bugs introduced
in 0.9.5. See the CHANGES for details.

What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From __peter__ at web.de  Wed Jan  3 15:16:40 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 03 Jan 2007 21:16:40 +0100
Subject: Sorting on multiple values, some ascending, some descending
References: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
	<1167852652.416990.158610@k21g2000cwa.googlegroups.com>
Message-ID: <enh2sa$n81$02$1@news.t-online.com>

Raymond Hettinger wrote:

> dwelden wrote:
>> I have successfully used the sort lambda construct described in
>> http://mail.python.org/pipermail/python-list/2006-April/377443.html.
>> However, how do I take it one step further such that some values can be
>> sorted ascending and others descending? Easy enough if the sort values
>> are numeric (just negate the value), but what about text?
>>
>> Is the only option to define an external sorting function to loop
>> through the list and perform the comparisons one value at a time?
> 
> The simplest way is to take advantage of sort-stability and do
> successive sorts.  For example, to sort by a primary key ascending and
> a secondary key decending:
> 
>    L.sort(key=lambda r: r.secondary, reverse=True)
>    L.sort(key=lambda r: r.primary)
> 
> A less general technique is to transform fields in a way that reverses
> their comparison order:
> 
>   L.sort(key=lambda r: (-r.age, r.height))    # sorts descending age
> and ascending height

You can get generality if you are willing to pay the performance penalty:

>>> items
[(3, 1), (2, 2), (1, 1), (1, 3), (2, 1), (2, 3), (1, 2)]
>>> class Reverse:
...     def __cmp__(self, other):
...             return -cmp(self.value, other.value)
...     def __init__(self, value):
...             self.value = value
...
>>> items.sort(key=lambda (x, y): (x, Reverse(y)))
>>> items
[(1, 3), (1, 2), (1, 1), (2, 3), (2, 2), (2, 1), (3, 1)]

Peter


From adam at atlas.st  Wed Jan 10 00:45:20 2007
From: adam at atlas.st (Adam Atlas)
Date: 9 Jan 2007 21:45:20 -0800
Subject: Announcement -- ZestyParser
Message-ID: <1168407920.281020.147680@k58g2000hse.googlegroups.com>

This has been on Cheese Shop for a few weeks now, being updated now and
then, but I never really announced it. I just now put up a real web
page for it, so I thought I'd take the opportunity to mention it here.

ZestyParser is my attempt at a flexible toolkit for creating concise,
precise, and Pythonic parsers. None of the existing packages really met
my needs; Pyparsing came the closest, but I find it still has some
shortcomings. ZestyParser is simply an abstract implementation of how I
think about parsing; I don't expect it'll meet everyone's parsing
needs, but I hope it'll make typical parsing tasks more joyful.

Here's the web page:
http://adamatlas.org/2006/12/ZestyParser/
Here's the Cheese Shop page:
http://cheeseshop.python.org/pypi/ZestyParser
(I recommend you get the source package, as it includes the examples.)

Check it out and let me know what you think!



From gheissenberger at gmail.com  Thu Jan 11 16:28:14 2007
From: gheissenberger at gmail.com (gheissenberger at gmail.com)
Date: 11 Jan 2007 13:28:14 -0800
Subject: Python nuube needs Unicode help
Message-ID: <1168550894.155528.295700@p59g2000hsd.googlegroups.com>

HELP!
Guy who was here before me wrote a script to parse files in Python.

Includes line:
print u
where u is a line from a file we are parsing.
However, we have started recieving data from Brazil. If I open file to
parse in VI, looks like:

<Utt id="3" transcribe="yes" audioRoot="A1"
audio="313-20070102144528.wav" grammarSet="G3" rawText="n&#227;o"
recValue="{data:CHOICE=NO;}" conf="970" rawText2="" conf2="0"
transcribedText="n&#227;o" parsableText="n&#227;o"/

Clearly those "n&#227" are some non-Ascii characters, but how do I get
print to understand that?

I keep getting:
"UnicodeEncodeError: 'ascii' codec can't encode character u'\xe3' in
position 40:
 ordinal not in range(128)"



From shejo284 at gmail.com  Fri Jan  5 06:35:55 2007
From: shejo284 at gmail.com (Sheldon)
Date: 5 Jan 2007 03:35:55 -0800
Subject: PyType_IsSubtype ()
In-Reply-To: <459E1988.8060807@v.loewis.de>
References: <1167986947.735415.99970@s34g2000cwa.googlegroups.com>
	<459E1988.8060807@v.loewis.de>
Message-ID: <1167996955.467665.286170@42g2000cwt.googlegroups.com>


Martin v. L?wis skrev:

> Sheldon schrieb:
> > Can anyone tell me what this error mean:
> > #0  0x4008376e in PyType_IsSubtype () from /usr/lib/libpython2.3.so.1.0
>
> It's not an error. It is just a frame from the backtrace.
>
> To understand the crash better, one would need to see more frames from
> the backtrace. Ideally, one would run the program in a debugger to
> analyse it further.
>
> Regards,
> Martin

I ran the program in GDB and it crashed giving the following backtrace:

#0  0x4008376e in PyType_IsSubtype () from /usr/lib/libpython2.3.so.1.0
#1  0x4047730c in ?? () from
/usr/lib/python2.3/site-packages/Numeric/_numpy.so
#2  0x000000f2 in ?? ()
#3  0x08d9dd34 in ?? ()
#4  0x4046c780 in PyArray_Return () from
/usr/lib/python2.3/site-packages/Numeric/_numpy.so
#5  0x08d9dd44 in ?? ()
#6  0x40100300 in PyBaseString_Type () from
/usr/lib/libpython2.3.so.1.0
#7  0x08105718 in ?? ()
#8  0x4007490d in PyObject_Init () from /usr/lib/libpython2.3.so.1.0
#9  0x08105ae0 in ?? ()

Can you make head or tail of this?

/Sheldon



From pavlovevidence at gmail.com  Sun Jan 21 22:51:47 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 21 Jan 2007 19:51:47 -0800
Subject: Reading Fortran Data
In-Reply-To: <1169436377.634274.172460@s34g2000cwa.googlegroups.com>
References: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
	<1169424273.929396.133880@m58g2000cwm.googlegroups.com>
	<1169429808.910298.10240@11g2000cwr.googlegroups.com>
	<1169433752.130978.133210@a75g2000cwd.googlegroups.com>
	<1169436377.634274.172460@s34g2000cwa.googlegroups.com>
Message-ID: <1169437907.263295.64840@q2g2000cwa.googlegroups.com>


Beliavsky wrote:
> Carl Banks wrote:
>
> <snip>
>
> > > A Fortran
> > > list-directed write can print results in an almost arbitrary format,
> > > depending on the compiler. Many compilers will separate integers by
> > > several spaces, not just one, and they could use commas instead of
> > > spaces if they wanted.
> >
> > 1. Hardly any compiler will produce a line of two integers, or reals,
> > that another compiler couldn't read back.
>
> Yes, but for more than three numbers, the statement is wrong. Intel
> Fortran prints four double precision random n
> as
>
>   0.555891433847495       0.591161642339424       0.888434673900224
>
>   0.487293557925127
>
> but g95 prints them on a single line.

Did you try to use one compiler's program's output as the other's
input?  How did it work?

> I advise against using
> list-directed Fortran writes to create files that other programs will
> read, and I think most experienced Fortran programmers would agree.

It's been awhile, but I'd consider myself an experienced Fortran
programner.  I don't really agree.


Carl Banks



From pretoriano_2001 at hotmail.com  Mon Jan  8 08:29:51 2007
From: pretoriano_2001 at hotmail.com (vizcayno)
Date: 8 Jan 2007 05:29:51 -0800
Subject: Recommendations (or best practices) to define functions (or
	methods)
In-Reply-To: <50ehtmF1fh46iU1@mid.uni-berlin.de>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
	<50ehtmF1fh46iU1@mid.uni-berlin.de>
Message-ID: <1168262991.007239.118840@s34g2000cwa.googlegroups.com>


Diez B. Roggisch ha escrito:

> vizcayno schrieb:
> > Hello:
> > Need your help in the "correct" definition of the next function. If
> > necessary, I would like to know about a web site or documentation that
> > tells me about best practices in defining functions, especially for
> > those that consider the error exceptions management.
> > I have the next alternatives but I think there are better:
>
> <snip/>
>
> IMHO none of them is good. Python has exceptions. Use them. There is no
> need to awkwardly communicate error conditions using return-values. Use
> return values to return values. Use exceptions in case of errors.
>
> Diez

Diez, in that case I woul prefer not to use exceptions and wait for
Python to abort itself and wait to see the message it issues.



From mh at ohm.pixar.com  Tue Jan 30 12:11:26 2007
From: mh at ohm.pixar.com (Mark Harrison)
Date: Tue, 30 Jan 2007 17:11:26 GMT
Subject: test,please ignore 2 qrm
Message-ID: <2%Kvh.1991$4H1.1305@newssvr17.news.prodigy.net>

please ignore


From no-spam at no-spam-no-spam.invalid  Fri Jan 12 06:29:41 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 12 Jan 2007 12:29:41 +0100
Subject: Is there a way to protect a piece of critical code?
In-Reply-To: <mailman.2630.1168581723.32031.python-list@python.org>
References: <mailman.2524.1168424917.32031.python-list@python.org>	<eo2pgf$j57$1@news.albasani.net><mailman.2558.1168494787.32031.python-list@python.org>	<eo50g4$hct$1@news.albasani.net>
	<mailman.2630.1168581723.32031.python-list@python.org>
Message-ID: <eo7rf9$u7d$1@news.albasani.net>

Hendrik van Rooyen wrote:
> "robert" <no-spam at no-spam-no-spam.invalid> wrote:
> 
> 
>> pushing data objects through an inter-thread queue is a major source for
> trouble - as this thread shows again.
>> Everybody builds up a new protocol and worries about Empty/Full,
> Exception-handling/passing, None-Elements, ...
>> I've noticed that those troubles disappear when a functional queue is used -
> which is very easy with a functional language like Python.
>> For example with
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491281
>>
>> One would just use a  cq=CallQueue()
>>
>> On the producer side one would just write the functional code one wants to
> execute in a target thread:
>> cq.call( what_i_want_do_func )
>>
>>
>> The consumer/receiver thread would just do (periodically) a non-blocking
>>
>> cq.receive()
>>
>>
>> => Without any object fumbling, protocol worries and very fast.
>>
>> And note: This way - working with functional jobs - one can also "protect a
> piece of critical code" most naturally and specifically for certain threads
> without spreading locks throughout the code.
>> Even things which are commonly claimed "forbidden" (even when using lots of
> locks) can be magically done in perfect order and effectively this way. Think of
> worker threads doing things in the GUI or in master / database owner threads
> etc.
>> Similarly discrete background thread jobs can be used in a functional style
> this way:
>> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491280
>> ( an alternative for the laborious OO-centric threading.Thread which mostly is
> a lazy copy from Java )
>> or for higher job frequencies by using "default consumer threads" as also
> shown in the 1st example of
>> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491281
>>
> 
> Thank you - had a (very) quick look and I will return to it
> later - It is not immediately obvious to my assembler
> programmer's mentality - looks like in the one case
> the thread starts up, does its job and then dies, and in
> the other its a sort of "remote" daemon like engine,
> that you can "tell what to do", from "here"...
> 
> Both concepts seem nice and I will try to wrap my head
> around them properly.
> 
> So far I have only used dicts to pass functions around
> in a relatively unimaginative static jump table like way...


Probably one has just to see that one can a pass a function object 
(or any callable) around as any other object.
Similar to a function address in assembler/C but very comfortable 
and with the comfort of closures (which automatically hold the 
status of local variables):

def f():
     print "hello"

def g(func):
     print "I'll do it ..."
     func()
     print "done."


def run(x):
     g(f)
     a="local variable\n"
     def h():
         b="inner local"
         print "inner function"
         print x,a,b
     g(h)
     g(lambda:sys.stdout.write(a))

run(1)



 From there its just natural to not pass dead objects through an 
inter-thread queue, but just code as it or even a "piece of 
critical code" ...
A small step in thought, but a big step in effect - soon 
eliminating bunches of worries about queues, pop-races/None 
objects, protocol, serialization, critical sections, thousands of 
locks etc.


Robert


From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 19 11:03:04 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 20 Jan 2007 03:03:04 +1100
Subject: Iterator length
References: <1169162762.997894.180320@q2g2000cwa.googlegroups.com>
	<1169167258.553202.190130@m58g2000cwm.googlegroups.com>
	<1169168139.350836.79790@s34g2000cwa.googlegroups.com>
	<pan.2007.01.19.11.36.29.99822@REMOVE.THIS.cybersource.com.au>
	<1169211840.951796.87080@q2g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.19.16.03.03.405251@REMOVE.THIS.cybersource.com.au>

On Fri, 19 Jan 2007 05:04:01 -0800, bearophileHUGS wrote:

> Steven D'Aprano:
>> > s = "aaabbbbbaabbbbbb"
>> > from itertools import groupby
>> > print [(h,leniter(g)) for h,g in groupby(s)]
>>
>> s isn't an iterator. It's a sequence, a string, and an iterable, but not
>> an iterator.
> 
> If you look better you can see that I use the leniter() on g, not on s.
> g is the iterator I need to compute the len of.


Oops, yes you're right. But since g is not an arbitrary iterator, one can
easily do this:

print [(h,len(list(g))) for h,g in groupby(s)]

No need for a special function.



>> I hope you know what sequences and strings are :-)
> 
> Well, I know little still about the C implementation of CPython
> iterators :-)
> 
> But I agree with the successive things you say, iterators may be very
> general things, and there are too many drawbacks/dangers, so it's
> better to keep leniter() as a function separated from len(), with
> specialized use.

I don't think it's better to have leniter() at all. If you, the iterator
creator, know enough about the iterator to be sure it has a predictable
length, you know how to calculate it. Otherwise, iterators in general
don't have a predictable length even in principle.



-- 
Steven.



From mail at microcorp.co.za  Tue Jan 16 01:39:14 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 16 Jan 2007 08:39:14 +0200
Subject: Maths error
References: <mailman.2480.1168350033.32031.python-list@python.org><Xns98B384E126F4Ctim111one@216.196.97.136><eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136><eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org><eo7kdf$a80$1@gemini.csx.cam.ac.uk<eoabbl$270$1@gemini.csx.cam.ac.uk><mailman.2709.1168753952.32031.python-list@python.org><f4mlq29t80pvvqbfm2ch2r2uf6tfnhlmnl
	<eoffvh$cfv$1@gemini.csx.cam.ac.uk>
Message-ID: <004c01c73939$0acbdc80$03000080@hendrik>

"Nick Maclaren" <nmm1 at cus.cam.ac.uk> wrote:

[Tim Roberts]
> |> Actually, this is a very well studied part of computer science called
> |> "interval arithmetic".  As you say, you do every computation twice, once to
> |> compute the minimum, once to compute the maximum.  When you're done, you
> |> can be confident that the true answer lies within the interval.

>
> The problem with it is that it is an unrealistically pessimal model,
> and there are huge classes of algorithm that it can't handle at all;
> anything involving iterative convergence for a start.  It has been
> around for yonks (I first dabbled with it 30+ years ago), and it has
> never reached viability for most real applications.  In 30 years, it
> has got almost nowhere.
>
> Don't confuse interval methods with interval arithmetic, because you
> don't need the latter for the former, despite the claims that you do.
>
> |> For people just getting into it, it can be shocking to realize just how
> |> wide the interval can become after some computations.
>
> Yes.  Even when you can prove (mathematically) that the bounds are
> actually quite tight :-)

This sounds like one of those pesky:
"but you should be able to do better" - kinds of things...

- Hendrik



From oliver at obeattie.com  Fri Jan  5 12:39:17 2007
From: oliver at obeattie.com (oliver at obeattie.com)
Date: 5 Jan 2007 09:39:17 -0800
Subject: Encoding / decoding strings
In-Reply-To: <pan.2007.01.05.15.34.29.883744@gmx.net>
References: <1167999295.242042.79470@s34g2000cwa.googlegroups.com>
	<1168010144.000928.131920@42g2000cwt.googlegroups.com>
	<pan.2007.01.05.15.34.29.883744@gmx.net>
Message-ID: <1168018757.397170.216870@11g2000cwr.googlegroups.com>


Marc 'BlackJack' Rintsch wrote:
> In <1168010144.000928.131920 at 42g2000cwt.googlegroups.com>,
> oliver at obeattie.com wrote:
>
> > Basically, I want to encode an email address so that it looks something
> > like 8d2e23c0a835598510c88a758c6b215a - this way the user does not know
> > the email address they are looking at. They are public-facing views and
> > they are to get info about other users, therefore anonymity is
> > important.
> >
> > Any suggestions?
>
> Don't deliver encoded e-mail addresses to other users.  They might decode
> them and the anonymity is gone.
>
> What exactly are you trying to do?  Why should users see encrypted e-mail
> addresses of others?
>
> Ciao,
> 	Marc 'BlackJack' Rintsch

Basically, what I am trying to do is display all comments by a
specified user on the website. As the only thing which has =always=
been used to identify users which never changes is their e-mail
addresses, this is the only thing which I can use. Obviously, I can't
display this e-mail address though.



From gagsl-py at yahoo.com.ar  Wed Jan  3 19:52:57 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 03 Jan 2007 21:52:57 -0300
Subject: code optimization (calc PI)
In-Reply-To: <XgQmh.98$9v1.124@nntpserver.swip.net>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
Message-ID: <7.0.1.0.0.20070103213856.055bae58@yahoo.com.ar>

At Wednesday 3/1/2007 12:50, mm wrote:

>Hmm... it's a question. It was not that easy to translate this #@*?%!
>C-Program into readable code and then to Python. But it works.

Because that code was written with C in mind, and uses some C 
subtlecies (uhm, got it right?) obscuring the original algorithm.
BTW, do you know where the algorithm was taken from?

>while c*2:

`while c:` does *exactly* the same without computing (and discarding) 
an intermediate object.

>     while (b-1):

If b>=1 initially (as it should, else this will be a loooooong loop), 
this is the same as `while b>1:` but without computing (and 
discarding) an intermediate object.

>        b=b-1 ## just for while-loop condition.

I'm not sure if the compiler is smart enough to translate this into `b -= 1`

>    c = c-14;  ## this is code vor the 1st while-loop, BUT bust run after

Same as above

>    pi = pi + str("%04d" % int(e + d/a))  ## this should be fast?! I dont

Someone else already pointed out how to improve this.

You don't show the rest of the code...


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From GatlingGun at gmail.com  Wed Jan 31 11:30:17 2007
From: GatlingGun at gmail.com (TOXiC)
Date: 31 Jan 2007 08:30:17 -0800
Subject: Regex with ASCII and non-ASCII chars
In-Reply-To: <epqee8$l9e$00$1@news.t-online.com>
References: <1170243969.504255.134100@v33g2000cwv.googlegroups.com>
	<epq6k8$po8$01$1@news.t-online.com>
	<1170257547.041535.20770@a75g2000cwd.googlegroups.com>
	<epqee8$l9e$00$1@news.t-online.com>
Message-ID: <1170261017.718665.179530@a75g2000cwd.googlegroups.com>

It wont work with utf-8,iso or ascii...



From horpner at yahoo.com  Thu Jan 11 14:00:15 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 11 Jan 2007 20:00:15 +0100
Subject: Fixed keys() mapping
References: <1168535970.585977.317760@p59g2000hsd.googlegroups.com>
Message-ID: <slrneqd2f1.qk.horpner@FIAD06.norwich.edu>

On 2007-01-11, George Sakkis <george.sakkis at gmail.com> wrote:
> I wrote an 'fkdict' dict-like class for mappings with a fixed
> set of keys but I'm wondering if there's a simpler way to go
> about it.
>
> First off, the main motivation for it is to save memory in case
> of many dicts with the same keys, for example when reading from
> a csv.DictReader or constructing dicts out of rows fetched from
> a database. For example, test_mem(dict) takes up around 246 MB
> according to the Windows task manager while test_mem(fkdict)
> takes around 49 MB:

It occurs to me you could create custom classes using __slots__
to get something similar. It's not terribly convenient.

class XYDict(object):
  __slots__ = ['x', 'y']
  def __getitem__(self, item):
    return self.__getattribute__(item)
  def __setitem__(self, key, item):
    return self.__setattr__(key, item)

This isn't terribly convenient because you have to create a new
class for every new set of keys. It isn't obvious to me how to
program a metaclass to automate the process. A lot more
boilerplate is necessary to act like a dict.

> def test_mem(maptype):
>     d = [(i,str(i)) for i in range(1000)]
>     ds = [maptype(d) for i in xrange(10000)]
>     raw_input('finished')
>
> An additional benefit is predictable ordering (e.g.
> fkdict.fromkeys('abcd').keys() == list('abcd')), like several
> ordered-dict recipes.
>
> The implementation I came up with goes like this: each fkdict
> instance stores only the values as a list in self._values. The
> keys and the mapping of keys to indices are stored in a
> dynamically generated subclass of fkdict, so that self._keys
> and self._key2index are also accessible from the instance. The
> dynamically generated subclasses are cached so that the second
> time an fkdict with the same keys is created, the cached class
> is called.
>
> Since the keys are determined in fkdict.__init__(), this scheme
> requires changing self.__class__ to the dynamically generated
> subclass. As much as I appreciate Python's dynamic nature, I am
> not particularly comfortable with objects that change their
> class and the implications this may have in the future (e.g.
> how well does this play with inheritance). Is this a valid use
> case for type-changing behavior or is there a better, more
> "mainstream" OO design pattern for this ? I can post the
> relevant code if necessary.

Since the type gets changed before __init__ finishes, I don't see
any problem with it. It sounds cool.

-- 
Neil Cerutti
It isn't pollution that is hurting the environment; it's the impurities in our
air and water that are doing it. --Dan Quayle


From inq1ltd at verizon.net  Mon Jan 15 17:33:43 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Mon, 15 Jan 2007 17:33:43 -0500
Subject: download win32file
Message-ID: <200701151733.43380.inq1ltd@verizon.net>



Where can I download win32file / win32ui?

The links below are broken.  Mark Hammond should 
be made aware of this.


URL below has two links that send you no place
http://mail.python.org/pipermail/python-list/2002-October/167638.html


Links:
http://starship.python.net/crew/mhammond/win32/Downloads.html

http://starship.python.net/crew/mhammond/downloads/win32all-148.exe


Produce;

 The requested URL was not found on this server. 
The link on the referring page seems to be wrong 
or outdated. Please inform the author of that 
page about the error.

jim-on-linux





From ziade.tarek at gmail.com  Sat Jan  6 04:47:17 2007
From: ziade.tarek at gmail.com (=?ISO-8859-1?Q?Tarek_Ziad=E9?=)
Date: Sat, 6 Jan 2007 10:47:17 +0100
Subject: python, zlib, and fedora 64bits
Message-ID: <94bdd2610701060147i6725e52bgdcc3d81377366ecd@mail.gmail.com>

Hello,

I am trying to compile Python on a Fedora 64bits, and I can't make zlib
work.

a python setup.py build leads to :

...
building 'zlib' extension
gcc -pthread -shared
build/temp.linux-x86_64-2.4/usr/local/src/Python-2.4.4/Modules/zlibmodule.o
-L/opt/python-2.4.4/lib -L/usr/local/lib -lz -o build/lib.linux-x86_64-2.4
/zlib.so
/usr/bin/ld: /usr/local/lib/libz.a(crc32.o): relocation R_X86_64_32 against
`a local symbol' can not be used when making a shared object; recompile with
-fPIC
/usr/local/lib/libz.a: could not read symbols: Bad value
collect2: ld gab 1 als Ende-Status zur?ck
running build_scripts
running install_lib
...

I've tried to recompile zlib, but didn't find any way to avoid this error

any ideas ?

Otherwise, does anyone has a zlib.so for fedora 64bits to send me ?

Thx

Tarek

-- 
Tarek Ziad? | Association AfPy | www.afpy.org
Blog FR | http://programmation-python.org
Blog EN | http://tarekziade.wordpress.com/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070106/acff49bd/attachment.html>

From deets at nospam.web.de  Mon Jan 29 12:25:52 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 29 Jan 2007 18:25:52 +0100
Subject: Can I undecorate a function?
References: <slrnersb0v.mua.matt@mwilson.umlcoop.net>
Message-ID: <526p10F1mbuekU2@mid.uni-berlin.de>

Matthew Wilson wrote:

> The decorator as_string returns the decorated function's value as
> string.  In some instances I want to access just the function f,
> though, and catch the values before they've been decorated.
> 
> Is this possible?
> 
> def as_string(f):
>     def anon(*args, **kwargs):
>         y = f(*args, **kwargs)
>         return str(y)
>     return anon
> 
> @as_string
> def f(x):
>     return x * x

Untested:


def as_string(f):
    def anon(*args, **kwargs):
        y = f(*args, **kwargs)
        return str(y)
    andon.the_function = f
    return anon


@as_string
def f(x):
   return x * x

print f.the_function(10)


Diez


From sxn02 at yahoo.com  Wed Jan 10 17:32:44 2007
From: sxn02 at yahoo.com (Sorin Schwimmer)
Date: Wed, 10 Jan 2007 14:32:44 -0800 (PST)
Subject: Python 2.5 install on Gentoo Linux: failed dmb and _tkinter
Message-ID: <514037.92809.qm@web56003.mail.re3.yahoo.com>

Hi All,

After a disaster in which I lost my whole harddrive,
I decided to install the newest everything that I use.
I put the latest Gentoo Linux, with gcc 4.1.1,
installed
tcl/tk 8.4.14 and tried Python 2.5. I tried with and
without the suggested -fwrapv compiler option, and
make
gave me the same:

<code>
# make
case $MAKEFLAGS in \
*-s*)  CC='gcc -pthread -fwrapv' LDSHARED='gcc
-pthread -fwrapv -shared' OPT='-DNDEBUG -g -O3 -Wall
-Wstrict-prototypes' ./python -E ./setup.py -q build;;
\
*)  CC='gcc -pthread -fwrapv' LDSHARED='gcc -pthread
-fwrapv -shared' OPT='-DNDEBUG -g -O3 -Wall
-Wstrict-prototypes' ./python -E ./setup.py build;; \
esac
running build
running build_ext
db.h: found (4, 2) in /usr/include
db lib: using (4, 2) db-4.2
building 'dbm' extension
gcc -pthread -fwrapv -fPIC -fno-strict-aliasing
-DNDEBUG -g -O3 -Wall -Wstrict-prototypes
-DHAVE_GDBM_NDBM_H -I.
-I/plus/install/Python-2.5/./Include -I./Include -I.
-I/usr/local/include
-I/plus/install/Python-2.5/Include
-I/plus/install/Python-2.5 -c
/plus/install/Python-2.5/Modules/dbmmodule.c -o
build/temp.linux-i686-2.5/plus/install/Python-2.5/Modules/dbmmodule.o
gcc -pthread -fwrapv -shared
build/temp.linux-i686-2.5/plus/install/Python-2.5/Modules/dbmmodule.o
-L/usr/local/lib -lgdbm -o
build/lib.linux-i686-2.5/dbm.so
*** WARNING: renaming "dbm" since importing it failed:
build/lib.linux-i686-2.5/dbm.so: undefined symbol:
dbm_firstkey
building '_tkinter' extension
gcc -pthread -fwrapv -fPIC -fno-strict-aliasing
-DNDEBUG -g -O3 -Wall -Wstrict-prototypes
-DWITH_APPINIT=1 -I/usr/X11R6/include -I.
-I/plus/install/Python-2.5/./Include -I./Include -I.
-I/usr/local/include
-I/plus/install/Python-2.5/Include
-I/plus/install/Python-2.5 -c
/plus/install/Python-2.5/Modules/_tkinter.c -o
build/temp.linux-i686-2.5/plus/install/Python-2.5/Modules/_tkinter.o
gcc -pthread -fwrapv -fPIC -fno-strict-aliasing
-DNDEBUG -g -O3 -Wall -Wstrict-prototypes
-DWITH_APPINIT=1 -I/usr/X11R6/include -I.
-I/plus/install/Python-2.5/./Include -I./Include -I.
-I/usr/local/include
-I/plus/install/Python-2.5/Include
-I/plus/install/Python-2.5 -c
/plus/install/Python-2.5/Modules/tkappinit.c -o
build/temp.linux-i686-2.5/plus/install/Python-2.5/Modules/tkappinit.o
gcc -pthread -fwrapv -shared
build/temp.linux-i686-2.5/plus/install/Python-2.5/Modules/_tkinter.o
build/temp.linux-i686-2.5/plus/install/Python-2.5/Modules/tkappinit.o
-L/usr/X11R6/lib64 -L/usr/X11R6/lib -L/usr/local/lib
-ltk8.4 -ltcl8.4 -lX11 -o
build/lib.linux-i686-2.5/_tkinter.so
*** WARNING: renaming "_tkinter" since importing it
failed: libtk8.4.so: cannot open shared object file:
No such file or directory
running build_scripts
</code>

I have libtk:

<code>
# ls -l /usr/local/lib/libtk8.4.so
-r-xr-xr-x 1 root root 906285 Jan 10 16:08
/usr/local/lib/libtk8.4.so
</code>

I can start wish.

I need Tkinter for sure, and I'll like to have dbm.
How should I proceed?

Thanks for your advice,
Sorin


 
____________________________________________________________________________________
Have a burning question?  
Go to www.Answers.yahoo.com and get answers from real people who know.


From arkanes at gmail.com  Wed Jan 24 16:56:45 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 24 Jan 2007 15:56:45 -0600
Subject: wxPython: panel not fully painted
In-Reply-To: <1169674550.837006.304370@q2g2000cwa.googlegroups.com>
References: <1169674550.837006.304370@q2g2000cwa.googlegroups.com>
Message-ID: <4866bea60701241356r46e287ebs484d488e6b7ce792@mail.gmail.com>

On 24 Jan 2007 13:35:51 -0800, citronelu at yahoo.com <citronelu at yahoo.com> wrote:
> Hi,
>
> I'm new to wxpython, and the following code is my first serious
> attempt:
>
>
> #~ start code
> import wx
>
> class MyPanel(wx.Panel):
>     def __init__(self, parent, id):
>         wx.Panel.__init__(self, parent, id)
>         self.parent = parent
>         button = wx.Button(self, -1, "Refresh")
>         button.SetPosition((100, 100))
>         button.SetFocus()
>
>         self.Bind(wx.EVT_BUTTON, self.OnCloseMe, button)
>
>     def OnCloseMe(self, event):
>         self.parent.f_redraw(self)
>         pass
>
>
> class MyFrame(wx.Frame):
>     def __init__(
>             self, parent, ID, title, pos=wx.DefaultPosition,
>             size=wx.DefaultSize, style=wx.DEFAULT_FRAME_STYLE
>             ):
>
>         wx.Frame.__init__(self, parent, ID, title, pos, size, style)
>
>     def f_redraw(self, kill_window):
>         kill_window.Destroy()
>         MyPanel(self, -1)
>         #~ self.SendSizeEvent()
>
>
> wxApp = wx.App()
> f = MyFrame(None, -1, "App Title")
> MyPanel(f, -1)
> f.Show()
> wxApp.MainLoop()
>
>
> #~ end code
>
>
> My problem is: when I press the "refresh" button, the new panel is
> painted only as a 20x20 pixels square on the top right side of the
> frame. If I resize the frame, the panel is repainted correctly (that's
> why I inserted the self.SendSizeEvent() line - commented above).
>
> Is there something I'm missing, or this is normal ?
>
> I'm using python 2.4.3 and wxpython 2.8.1.1 unicode, on WinXP SP2.
> Windows extensions are also installed.
>

This is expected. Note that your "redraw" is no such thing - you are
destroying the window and creating a new one.

A feature of the wx.Frame class is that if it has one and only one
child, that child is sized to fill the client area of the frame.
However, this sizing happens in response to size events of the frame
itself, so when you create the new panel, it is shown at its default
size until you resize the frame (or emulate resizing the frame via
SendSizeEvent).


From pgarrone at acay.com.au  Tue Jan  2 05:57:34 2007
From: pgarrone at acay.com.au (pgarrone at acay.com.au)
Date: 2 Jan 2007 02:57:34 -0800
Subject: mutable numeric type
In-Reply-To: <mailman.2193.1167708425.32031.python-list@python.org>
References: <mailman.2193.1167708425.32031.python-list@python.org>
Message-ID: <1167735454.604184.110630@i12g2000cwa.googlegroups.com>

Way to go.
Try doing this.
x = MutableNumeric(42)
y = x
x += 42
print y



From Roland.Puntaier at br-automation.com  Wed Jan 10 10:55:21 2007
From: Roland.Puntaier at br-automation.com (Roland Puntaier)
Date: Wed, 10 Jan 2007 16:55:21 +0100
Subject: call graph using python and cscope
In-Reply-To: <1168348224.843657.27330@42g2000cwt.googlegroups.com>
Message-ID: <OF0A127001.2FA34A0B-ONC125725F.004B95A9-C125725F.0057797E@br-automation.com>

""" 
Sometimes it is nice to have the data used by cscope accessible in a 
programatic way.
The following python script extract the "functions called" information 
from cscope (function: callGraph)
and produced an html file from them.

  from csCallGraph import *
  acg=callGraph(entryFun,workingDir)

entryFun is the function to start with (e.g. main)
workingDir is the directory where cscope.out is located

As a script it can be called like:
  csCallGraph main > myprogram.html
"""

import subprocess , os, sys

def functionsCalled(entryFun,workingDir):
  cmd = "cscope -d -l -L -2%s"%entryFun
  process = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True, 
cwd=workingDir) 
  csoutput= process.stdout.read() 
  del process
  cslines=[arr.strip().split(' ') for arr in csoutput.split('\n') if 
len(arr.split(' '))>1]
  funsCalled={}
  for fl in cslines:
    if funsCalled.has_key(fl[0]):
      funsCalled[fl[0]]|=set([fl[1]])
    else:
      funsCalled[fl[0]]=set([fl[1]])
  allFuns=set(map(lambda x:x[1],cslines))
  return (allFuns,funsCalled)

def callGraph(entryFun,workingDir,cg={}):
  if not cg.has_key(entryFun): 
    allFuns,funsCalled=functionsCalled(entryFun,workingDir)
    cg[entryFun]=funsCalled
    for af in allFuns:
      cg=callGraph(af,workingDir,cg)
  return cg

def textCallGraph(acg):
  innerFuns=[(f,d,len(reduce(lambda x,y:x|y,d.values()))) for f,d in 
acg.items() if len(d)>0 ]
  leafFuns=[(f,d,0) for f,d in acg.items() if not len(d)>0 ]
  innerFuns.sort(lambda x,y: y[2]-x[2])
  innerLen=len(innerFuns)
  leafLen=len(leafFuns)
  title=lambda aFun: '\n' + aFun + '\n' + '-'*len(aFun)
  def ff(aFun,funsCalled):
    fileFuns=zip(funsCalled.keys(),['    '+',\n '.join(funsCalledInFile) 
for funsCalledInFile in funsCalled.values()])
    funIn=lambda f: '\n%s in '%f
    return title(aFun) + funIn(aFun) + funIn(aFun).join(map(lambda 
x:'%s:\n%s'%(x[0],x[1]),fileFuns))
  strInner='\n'.join([ff(f[0],f[1]) for f in innerFuns])
  strLeaves='\n'.join(map(lambda x:title(x[0]),leafFuns))
  return strInner+'\n'+strLeaves

def funWeights(acg):
  funWeights=dict([(f,reduce(lambda x,y:x|y,d.values())) for f,d in 
acg.items() if len(d)>0 ]+
      [(f,[]) for f,d in acg.items() if not len(d)>0 ])
  weights={}
  def calcWeights(af):
    if not weights.has_key(af):
      subFuns=funWeights[af]
      weights[af]=1
      for f in subFuns:
        calcWeights(f)
        weights[af]+=weights[f]
  for af in funWeights.keys(): calcWeights(af)
  return weights

def htmlCallGraph(acg):
  funW=funWeights(acg)
  innerFuns=[(f,d,funW[f]) for f,d in acg.items() if len(d)>0 ]
  leafFuns=[(f,d,0) for f,d in acg.items() if not len(d)>0 ]
  #innerFuns.sort(lambda x,y: y[2]-x[2]))
  def cfun(a,b):
    if b > a:
      return 1
    elif b < a:
      return -1
    return 0
  innerFuns.sort(lambda x,y: cfun(x[2],y[2]))
  innerLen=len(innerFuns)
  leafLen=len(leafFuns)
  funDict=dict(zip(map(lambda x:x[0],innerFuns)+map(lambda 
x:x[0],leafFuns),range(innerLen+leafLen)))
  title=lambda aFun: '<hr><h4><a name=#f%i'%funDict[aFun]+'>' + aFun + ' 
(%i)'%funW[aFun] + '</a></h4>\n'
  def ff(aFun,funsCalled):
    fun=lambda y:'<a href=#f%i'%funDict[y]+' 
style="text-decoration:none">'+y+'</a>'
    fileFuns=zip(funsCalled.keys(),[',\n'.join(map(fun,funsCalledInFile)) 
for funsCalledInFile in funsCalled.values()])
    funIn=lambda f: '<br><em>%s</em> in '%f
    return title(aFun) + funIn(aFun) + funIn(aFun).join(map(lambda 
x:'%s:\n%s'%(x[0],x[1]),fileFuns))
  strInner='\n'.join([ff(f[0],f[1]) for f in innerFuns])
  strLeaves='\n'.join(map(lambda x:title(x[0]),leafFuns))
  return '<html>\n<body>\n'+strInner+'\n'+strLeaves+"</body>\n</html>\n"

if __name__ == '__main__':
  if len(sys.argv) < 2:
      print 'Usage: csGragh.py entryFunction'
      sys.exit()
  entryFun=sys.argv[1]
  workingDir=os.getcwd()
  acg=callGraph(entryFun,workingDir)
  print htmlCallGraph(acg)


From steve at holdenweb.com  Thu Jan 25 04:16:18 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 25 Jan 2007 09:16:18 +0000
Subject: Python does not play well with others
In-Reply-To: <1169678399.502252.123450@j27g2000cwj.googlegroups.com>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>	<1169660807.369400.120220@h3g2000cwc.googlegroups.com>
	<1169678399.502252.123450@j27g2000cwj.googlegroups.com>
Message-ID: <ep9sh2$uug$1@sea.gmane.org>

Kay Schluehr wrote:
> On 25 Jan., 04:46, "Paul Boddie" <p... at boddie.org.uk> wrote:
> 
>>>   That's because, in those worlds, either the
>>> development team for the language or the development team
>>> for the subsystem takes responsibility for making them work.
>>> Only Python doesn't do that.And this is where I'd almost reach agreement with you. It's not enough
>> for the language to keep growing new features if the libraries are
>> broken or appear archaic, and this task seems to be outside the "core
>> developers" area of interest.
> 
> But it shouldn't be - although this is not a request for the core
> developers to maintain any 3rd party package in the world, of course. A
> while ago someone on python-dev suggested to use builtbot to monitor
> were 3rd party packages get broken by new Python releases and offered
> this as a service to library developers. I do think this and similar
> ideas are relevant to improve overall quality, not only that of the
> CPython interpreter. I would also suggest stricter policies for PyPI
> were unmaintained packages might be removed after a period ( or at
> least tagged in a certain way ).
> 
> But maybe admitting quality problems of free software that is affecting
> the whole community ( and not just isolated projects ) is just too much
> negative PR on a "competitive language market"? We all know Ruby makes
> us happy and Haskell is driven by real academics, who are doing
> software engineering right, by default. Maybe Python could survive only
> leaving the impression that it binds to everything and has an ever
> growing code base of high quality?
> 
Looking at the history of the bug, it ends with a request from Martin 
von Loewis that James Eagan (the author of the patch, for which we 
should be grateful) provide unit tests and documentation to go with the 
code already contributed, finally followed by a comment from James that 
it will be a while before he has time to make the necessary changes.

I don't think there's any attempt here to avoid admitting that there's a 
quality problem with the existing code. Adding new functionality without 
tests and documentation certainly wouldn't improve things.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From garryknight at gmx.net  Sun Jan 28 21:35:46 2007
From: garryknight at gmx.net (Garry Knight)
Date: Mon, 29 Jan 2007 02:35:46 +0000
Subject: IP address
References: <mailman.3244.1169978684.32031.python-list@python.org>
	<ephtph$fcl$1@minji.szn.dk>
Message-ID: <1170038148.54673.0@demeter.uk.clara.net>

Klaus Alexander Seistrup wrote:

> urllib.urlopen("http://myip.dk/")

http://whatismyip.org gives it to you in a more usable format. But, as
others have pointed out, it might return your router's IP.

-- 
Garry Knight
garryknight at gmx.net


From kay.schluehr at gmx.net  Wed Jan  3 09:50:13 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 3 Jan 2007 06:50:13 -0800
Subject: function without brackets ?
In-Reply-To: <57668$459bbf95$d443bb3a$16218@news.speedlinq.nl>
References: <57668$459bbf95$d443bb3a$16218@news.speedlinq.nl>
Message-ID: <1167835813.229187.93190@i12g2000cwa.googlegroups.com>


Stef Mientki schrieb:

> If I call a parameterless function without brackets at the end,
> the function is not performed, but ...
> I don't get an error message ???
>
> Is this normal  behavior ?

Yes, this is perfectly o.k. because each function is a first class
citizen in Python. The difference between foo() and foo is simply that
foo() is the value returned by the function call on foo and foo is a
function object. 

Kay



From sturlamolden at yahoo.no  Wed Jan 10 12:22:42 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 10 Jan 2007 09:22:42 -0800
Subject: Parallel Python
In-Reply-To: <1168417065.105920.319970@o58g2000hsb.googlegroups.com>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
Message-ID: <1168449762.738411.128240@i56g2000hsf.googlegroups.com>


parallelpyt... at gmail.com wrote:

>    That's right. ppsmp starts multiple interpreters in separate
> processes and organize communication between them through IPC.

Thus you are basically reinventing MPI.


http://mpi4py.scipy.org/
http://en.wikipedia.org/wiki/Message_Passing_Interface



From arkanes at gmail.com  Thu Jan 11 09:41:13 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 11 Jan 2007 08:41:13 -0600
Subject: Type casting a base class to a derived one?
In-Reply-To: <slrneqcgve.1n0.horpner@FIAD06.norwich.edu>
References: <mailman.2571.1168518354.32031.python-list@python.org>
	<slrneqcgve.1n0.horpner@FIAD06.norwich.edu>
Message-ID: <4866bea60701110641n5eb4cc57uf5967aebcfd7790d@mail.gmail.com>

On 11 Jan 2007 15:01:48 +0100, Neil Cerutti <horpner at yahoo.com> wrote:
> On 2007-01-11, Frederic Rentsch <anthra.norell at vtxmail.ch> wrote:
> > If I derive a class from another one because I need a few extra
> > features, is there a way to promote the base class to the
> > derived one without having to make copies of all attributes?
> >
> > class Derived (Base):
> >    def __init__ (self, base_object):
> >       # ( copy all attributes )
> >       ...
> >
> > This looks expensive. Moreover __init__ () may not be available
> > if it needs to to something else.
> >
> > Thanks for suggestions
>
> How does it make sense to cast a base to a derived in your
> application?
>

I can't figure out any circumstance when you'd need to do this in
Python. Upcasting like this is something you do in statically typed
languages. I suspect that the OP doesn't really believe dynamic
casting works and doesn't want to pass a derived class for some
reason.


From ccurvey at gmail.com  Wed Jan 31 12:22:40 2007
From: ccurvey at gmail.com (Chris Curvey)
Date: 31 Jan 2007 09:22:40 -0800
Subject: how to make a python windows service know it's own identity
Message-ID: <1170264160.124454.6270@j27g2000cwj.googlegroups.com>

Hi all,

I have used the win32com libraries to set up a service called
MyService under Windows.  So far, so good.  Now I need to run multiple
copies of the service on the same machine.  I also have that working.
For monitoring and logging, I'd like each instance of the service to
know it's own identity (MyService1, MyService2, etc.)

But I can't quite seem to grasp how to do this.  In the code below,
the command line parameter "-i" gives the service an identity, but how
do I get the service to understand it's identity when it is started?

Many thanks!


class MyService(win32serviceutil.ServiceFramework):
    """NT Service."""

    _svc_name_ = "MyService"
    _svc_display_name_ = "My Service"

    _id_ = ''

    def SvcDoRun(self):
        provider = MyServiceClass(identifier=self._id_)
        provider.start()

        # now, block until our event is set...
        win32event.WaitForSingleObject(self.stop_event,
win32event.INFINITE)

   # __init__ and SvcStop snipped


###########################################################################
if __name__ == '__main__':
    import optparse
    parser = optparse.OptionParser()
    parser.add_option("-i", "--identifier", dest="identifier")
    (opts, args) = parser.parse_args()
    if opts.number is not None:
        MyService._svc_name_ += opts.identifier
        MyService._svc_display_name_ += opts.identifier
        MyService._provider_id_ = opts.identifier

    win32serviceutil.HandleCommandLine(MyService,
customInstallOptions="i:")



From gdamjan at gmail.com  Thu Jan 25 19:13:16 2007
From: gdamjan at gmail.com (Damjan)
Date: Fri, 26 Jan 2007 01:13:16 +0100
Subject: Question about docutils
References: <45b7fca1$0$49206$14726298@news.sunsite.dk>
	<1169686142.135007.127760@m58g2000cwm.googlegroups.com>
Message-ID: <45b947d1$0$49197$14726298@news.sunsite.dk>

>> I'm using docutils 0.4.
>> Is it possible to define special custom 'tags' (or something) that will
>> invoke my own function? The function would then return the real content
>> in the ReST document.
> 
> I -think- this is what you're looking for:
> http://docutils.sourceforge.net/docs/howto/rst-roles.html
> 
> Hope it helps.

Thanks, it looks to be exactly what I need... I'm reading it now, and will
try to implement it.


-- 
damjan


From jgodoy at gmail.com  Sat Jan 20 13:42:16 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sat, 20 Jan 2007 16:42:16 -0200
Subject: OT Annoying Habits
References: <NYOBGCEXSMTP21R1PDG000b0f9b@nyobgcexsmtp21.uswin.ad.vzwcorp.com>
	<mailman.2940.1169295399.32031.python-list@python.org>
	<1169317608.819304.321210@l53g2000cwa.googlegroups.com>
Message-ID: <87bqkt5ylz.fsf@gmail.com>

"John Machin" <sjmachin at lexicon.net> writes:

> Michael.Coll-Barth at VerizonWireless.com wrote:
> [snip]
>
>> The information contained in this message and any attachment may be
>> proprietary, confidential, and privileged or subject to the work
>> product doctrine and thus protected from disclosure.  If the reader
>> of this message is not the intended recipient, or an employee or
>> agent responsible for delivering this message to the intended
>> recipient, you are hereby notified that any dissemination,
>> distribution or copying of this communication is strictly prohibited.
>> If you have received this communication in error, please notify me
>> immediately by replying to this message and deleting it and all
>> copies and backups thereof.  Thank you.
>
> ... and while we're talking about annoyances ...

For those there is always http://www.goldmark.org/jeff/stupid-disclaimers/
:-) 


Be seeing you,
-- 
Jorge Godoy      <jgodoy at gmail.com>


From garyjefferson123 at yahoo.com  Fri Jan 19 02:08:18 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: 18 Jan 2007 23:08:18 -0800
Subject: selective logger disable/enable
Message-ID: <1169190498.593059.238150@q2g2000cwa.googlegroups.com>

Suppose I have 3 modules that belong to a project, 'A', 'A.a' and 'B',
and each module has its own logger, created with:

module1logger = logging.getLogger('project.A')

and

module2logger = logging.getLogger('project.A.a')

and

module3logger = logging.getLogger('project.B')


And I want to selectively enable/disable these, per module (for
example, I only want logging from A and A.a, or just from B, etc).  It
seems like logging.Filter is supposed to let me do this, but I can't
see how to apply it globally.  Is there really no other way that to add
a addFilter(filter) call to each of these loggers individually?

logging.basicConfig gets inherited by all loggers, but it doesn't seem
capable of giving a Filter to all loggers.  Is there any way to do this?



From aboudouvas at panafonet.gr  Thu Jan 18 05:25:54 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 18 Jan 2007 02:25:54 -0800
Subject: PyODBC Stored proc calling
Message-ID: <1169115954.917268.74210@51g2000cwl.googlegroups.com>

Hi to all,

can anyone give me a jump-start about how to call Stored Procedures
from PyODBC ??
I want to execute a very simple testing Stored Procedure on an Sql
Server database.

I started using PyODBC and code like the following

cnxn = pyodbc.connect('DRIVER={SQL
Server};SERVER=hercules;DATABASE=pubs;UID=sa;PWD=pwd'')

for row in cnxn.execute("select au_fname from authors"):
    print row.au_fname
cnxn.close()

and based on this, i can now write more complex ad-hoc sql string to
get/update data.
But how i can actually call Stored Procedures and passing parameters to
them ??

Let's say i have the following SP:

create procedure test_bed(@data varchar(100))
as
// do something here.


Any help ??

Thanks in advance



From robert.kern at gmail.com  Fri Jan 12 01:28:43 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 12 Jan 2007 00:28:43 -0600
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
In-Reply-To: <eo78ah$dqc$1@sea.gmane.org>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>	<mailman.2496.1168375040.32031.python-list@python.org>	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
	<eo78ah$dqc$1@sea.gmane.org>
Message-ID: <eo79r1$gq0$1@sea.gmane.org>

Travis E. Oliphant wrote:

> If you use numpy.fromfile, you need to skip past the initial header row 
> yourself.  Something like this:
> 
> fid = open('somename.csv')

# I think you also meant to include this line:
header = fid.readline()

> data = numpy.fromfile(fid, sep=',').reshape(-1,6)
> # for 6-column data.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From codecraig at gmail.com  Tue Jan  9 09:33:25 2007
From: codecraig at gmail.com (abcd)
Date: 9 Jan 2007 06:33:25 -0800
Subject: Determine an object is a subclass of another
Message-ID: <1168353205.066357.39530@42g2000cwt.googlegroups.com>

How can tell if an object is a subclass of something else?

Imagine...

class Thing:
    pass

class Animal:
    pass

class Dog:
    pass

d = Dog()

I want to find out that 'd' is a Dog, Animal and Thing.  Such as...

d is a Dog
d is a Animal
d is a Thing

Thanks



From gagsl-py at yahoo.com.ar  Thu Jan 18 23:13:36 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 01:13:36 -0300
Subject: Anyone has a nice "view_var" procedure ?
In-Reply-To: <3feaf$45aff382$d443bb3a$12046@news.speedlinq.nl>
References: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
	<1168904865.253014.210140@m58g2000cwm.googlegroups.com>
	<8ab5f$45ad5c12$d443bb3a$7243@news.speedlinq.nl>
	<mailman.2823.1169032836.32031.python-list@python.org>
	<5d831$45aea748$d443bb3a$26464@news.speedlinq.nl>
	<mailman.2857.1169076197.32031.python-list@python.org>
	<3feaf$45aff382$d443bb3a$12046@news.speedlinq.nl>
Message-ID: <7.0.1.0.0.20070119011101.038ee750@yahoo.com.ar>

At Thursday 18/1/2007 19:24, Stef Mientki wrote:

> > str(key)[7:-2] => key.__name__
>I didn't know that one

It's here: http://docs.python.org/lib/specialattrs.html


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From gagsl-py at yahoo.com.ar  Sun Jan 28 21:00:37 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 28 Jan 2007 23:00:37 -0300
Subject: Python interfacing with COM
In-Reply-To: <1170002486.751749.23180@m58g2000cwm.googlegroups.com>
References: <1170002486.751749.23180@m58g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20070128225544.047164d8@yahoo.com.ar>

At Sunday 28/1/2007 13:41, Viewer T. wrote:

>I am quite a newbie and I am trying to interface with Microsoft Word
>2003 COM with Python. Please what is the name of the COM server for
>Microsoft Word 2003?

Just use Word.Application, will launch the currently installed Word:

py> import win32com.client
py> word = win32com.client.Dispatch("Word.Application")
py> word.Visible = 1
py> word.Documents.Open(FileName=r"c:\any\filename.doc")
<win32com.gen_py.None.Document>
py> word.Quit()


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From mail at microcorp.co.za  Sat Jan 13 04:49:24 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 13 Jan 2007 11:49:24 +0200
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com><mailman.2597.1168550439.32031.python-list@python.org><eo6ia5$5bt$1@gemini.csx.cam.ac.uk><mailman.2643.1168611301.32031.python-list@python.org><eo883j$l9d$1@gemini.csx.cam.ac.uk><mailman.2648.1168616202.32031.python-list@python.org><eo8b1r$r9c$1@gemini.csx.cam.ac.uk><mailman.2664.1168630485.32031.python-list@python.org>
	<eo8oa0$o4o$1@gemini.csx.cam.ac.uk>
Message-ID: <000501c73797$3ef23ac0$03000080@hendrik>

From: "Nick Maclaren" <nmm1 at cus.cam.ac.uk> wrote:

> Financial calculations need decimal FIXED-point, with a precisely
> specified precision.  It is claimed that decimal FLOATING-point
> helps with providing that, but that claim is extremely dubious.
> I can explain the problem in as much detail as you want, but would
> very much rather not.

Ok I will throw in a skewed ball at this point - use integer arithmetic,
and work in tenths of cents or pennies or whatever, and don't be too 
lazy to do your own print formatting...

To represent $121.23 as a float is just asking for trouble when you
are trying to deal with something that can take a value like:

$123 456 789 012 345 678 901.07  - and you are worried about the 
seven cents for accounting purposes...

Remember that its not only money that is measured like that, but 
debt too...

-Hendrik



From aboudouvas at panafonet.gr  Fri Jan  5 08:45:52 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 5 Jan 2007 05:45:52 -0800
Subject: program deployment
In-Reply-To: <1168002070.704739.76470@q40g2000cwq.googlegroups.com>
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
Message-ID: <1168004752.091662.178060@s80g2000cwa.googlegroups.com>

> Python code is normally deployed as straight source code.

But isn't this a problem of its own ?? I mean, many people do not feel
good if the know that their source code is lying around on other
machines...



From tubby at bandaheart.com  Wed Jan  3 20:07:56 2007
From: tubby at bandaheart.com (tubby)
Date: Wed, 03 Jan 2007 20:07:56 -0500
Subject: new office formats, REs and Python
Message-ID: <enhk26$gna$1@solaris.cc.vt.edu>

How are Python users dealing with some of the new OASIS Open Document 
formats (Open Office) or MS Open XML formats. These formats store data 
in a file which is actual a zip archive that contains numerous files and 
folders. For example, a file saved from Open Office 2.0 named 'test.odt' 
can be unzipped into many parts... content.xml, meta.xml, settings.xml, 
etc, etc.

How can I read these files do re searching and matching on them, etc? 
content.xml may have a string I'm searching for, but how would I attach 
that back to the original 'test.odt' file?

Perl seems to have a module to handle this, does Python?

http://search.cpan.org/dist/OpenOffice-OODoc/


From martin at v.loewis.de  Sun Jan 21 18:56:23 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 22 Jan 2007 00:56:23 +0100
Subject: mmap caching
In-Reply-To: <1169422167.683707.264180@a75g2000cwd.googlegroups.com>
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>
	<45B3DD4D.3010009@v.loewis.de>
	<1169422167.683707.264180@a75g2000cwd.googlegroups.com>
Message-ID: <45B3FDA7.9030702@v.loewis.de>

George Sakkis schrieb:
>> You must be misinterpreting what you are seeing. It's the operating
>> system that decides what part of a memory-mapped file are held in
>> memory, and that is certainly not without limits.
> 
> Sure; what I meant was that that whatever the limit is, it's high
> enough that a MemoryError is raised before the limit is reached.

The operating system will absolutely, definitely, certainly release
any cached data it can purge before reporting it is out of memory.

So if you get a MemoryError, it is *not* because the operating system
has cached too much data.

In fact, memory that is read in because of mmap should *never* cause
a MemoryError. Python calls MapViewOfFile when mmap.mmap is invoked,
at which point the operating commits to providing that much address
space to the application, along with backing storage on disk
(typically, from the file being mapped, unless it is an anonymous
map). Later access to the mapped range cannot fail (except for
hardware errors), and if it would, you wouldn't see a MemoryError.

> It's the one in the 'Processes' tab of the Windows task manager (XP
> proffesional). By the way, I ran the same program on a box with more
> physical memory and the mem. usage stops growing at around 430MB, by
> which time the whole file is most likely cached. I'd be interested in
> any suggestions other than "buy more RAM" :) (these are not my machines
> anyway).

As a starting point, try understanding better what is really happening.
Turn on "Virtual Memory Size" in "View/Select Columns" also, and perhaps
a few additional counters as well. Also take a look at the "Commit
Charge", which takes into account swap file usage as well. Try
increasing the size of the swap file.

Regards,
Martin


From nospam at nospam.com  Mon Jan 29 11:13:46 2007
From: nospam at nospam.com (Hampton Din)
Date: Mon, 29 Jan 2007 10:13:46 -0600
Subject: Excellent Interview with Dennis D'Souza, full of laughs
References: <1170083292.991070.79560@v33g2000cwv.googlegroups.com>
Message-ID: <45be1d27$0$97248$892e7fe2@authen.yellow.readfreenews.net>


     stupid troll 




From manouchk at gmail.com  Thu Jan 18 11:34:55 2007
From: manouchk at gmail.com (manouchk)
Date: 18 Jan 2007 08:34:55 -0800
Subject: nsis and command-line argument
Message-ID: <1169138095.499650.8530@m58g2000cwm.googlegroups.com>

Hi,

is there a standart way to prepare a single exe with nsis that pass the
command line to an exe created by py2exe on windows?

py2exe allows to prepare an exe that get the command-line but needs
some lib file so that it is not so elegant to ditribute. I tried a
simple setup.nsis script to prepare a single file exe with works fine
except that it does get the command-line.

Is there a way do get the command line with the setup.nsis script?
or any other simple method ?



From practicalperl at gmail.com  Fri Jan 19 05:54:33 2007
From: practicalperl at gmail.com (Jm lists)
Date: Fri, 19 Jan 2007 18:54:33 +0800
Subject: Why this script can work?
In-Reply-To: <51bjskF1jbnhrU1@mid.uni-berlin.de>
References: <mailman.2891.1169189508.32031.python-list@python.org>
	<51bjskF1jbnhrU1@mid.uni-berlin.de>
Message-ID: <fbe35f750701190254i79ecddf6id4dd9a7e726d1f5b@mail.gmail.com>

Thanks for all the helps.
I'm not habitual for this usage of 'else',other languages seem don't
support this syntax.
i.g,writting the codes below by Perl would get an error:

# perl -le 'for $i  (1..10){print $i}  else{print "finished"}'
syntax error at -e line 1, near "}else"
Execution of -e aborted due to compilation errors.

2007/1/19, Diez B. Roggisch <deets at nospam.web.de>:
> Jm lists wrote:
>
> > Please help with this script:
> >
> > class ShortInputException(Exception):
> >         '''A user-defined exception class.'''
> >         def __init__(self,length,atleast):
> >                 Exception.__init__(self)
> >                 self.length=length
> >                 self.atleast=atleast
> >
> > try:
> >         s=raw_input('Enter something --> ')
> >         if len(s)<3:
> >                 raise ShortInputException(len(s),3)
> >         # Other work can continue as usual here
> > except EOFError:
> >         print '\nWhy did you do an EOF on me?'
> > except ShortInputException,x:
> >         print 'ShortInputException: The input was of length %d, was
> > expecting at least %d' %(x.length,x.atleast)
> > else:
> >         print 'No exception was raised.'
> >
> >
> > My questions are:
> >
> > 1) ShortInputException,x:   what's the 'x'? where is it coming?
>
> except <ExceptionSpec>, <variable>:
>
> will catch an exception of the kind specified in <ExceptionSpec> (it might
> actually be more than one), and store the exception object in the variable
> named <variable>
>
> > 2) The 'if' and 'else' are not in the same indent scope,why this can work?
>
>
> Because additionally to if, also for and try have else-clauses. The latter
> two are only being called if the body of the control structure hasn't been
> left due to "unnatural" circumstances. See this:
>
>
>
>
> for i in xrange(10):
>     pass
> else:
>     print "test 1"
>
> for i in xrange(10):
>     break
> else:
>     print "test 2"
>
> try:
>     pass
> except:
>     pass
> else:
>     print "test 3"
>
> try:
>     raise "I know I shouldn't rais strings..."
> except:
>     pass
> else:
>     print "test 4"
>
>
>
> It will only print
>
> test 1
> test 3
>
>
> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From gandalf at designaproduct.biz  Fri Jan  5 12:04:23 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Fri, 05 Jan 2007 18:04:23 +0100
Subject: importing / loading a module / class dynamically
In-Reply-To: <Qrvnh.22242$Dy2.4262@newsfe20.lga>
References: <o1vnh.281$rv1.88@newsfe21.lga>	<mailman.2329.1168015250.32031.python-list@python.org>
	<Qrvnh.22242$Dy2.4262@newsfe20.lga>
Message-ID: <459E8517.7040901@designaproduct.biz>


> Thanks,
>
> What I am doing is adding plugin support to PyCrust ... so I'm looking for a
> mechanism where anyone can develop a plugin and have it loaded by pycrust.
>
> the .py was a typo 
>
>
> why the "...Have at least an empty plugin/name1/__init__.py file..." ?
>   
When you do

import plugins.name1.name1

then "plugins" and "plugins/name1" should be a package, not a module. A 
package is a special directory that contains package initialization code 
in a __init__.py file. If you do not have the file, then the "plugins" 
directory will be only a directory, and it cannot be imported.

For details, see:

http://docs.python.org/tut/node8.html#SECTION008400000000000000000

  Laszlo



From Thomas.Ploch at gmx.net  Tue Jan  9 09:57:02 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Tue, 09 Jan 2007 15:57:02 +0100
Subject: How to write temporary data to file?
In-Reply-To: <45A362EF.1080006@designaproduct.biz>
References: <45A31767.9030404@gmx.net> <45A362EF.1080006@designaproduct.biz>
Message-ID: <45A3AD3E.1090500@gmx.net>

Laszlo Nagy schrieb:
> Thomas Ploch ?rta:
>> Hi folks,
>>
>> I have a data structure that looks like this:
>>
>> d = {
>>     'url1': {
>>         'emails': ['a', 'b', 'c',...],
>>         'matches': ['d', 'e', 'f',...]
>>     },
>>     'url2': {...
>> }
>>
>> This dictionary will get _very_ big, so I want to write it somehow to a
>> file after it has grown to a certain size.
>>
>> How would I achieve that?
>>   
> How about dbm/gdbm? Since urls are strings, you can store this dict in a
> database instance and actually use it from your program as it were a dict?
> 
>   Laszlo
> 

Well, but how do I save the nested dict values? I don't want to eval
them, so this is no option for me.

Thomas


From fuzzyman at gmail.com  Fri Jan  5 15:52:58 2007
From: fuzzyman at gmail.com (Fuzzyman)
Date: 5 Jan 2007 12:52:58 -0800
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
Message-ID: <1168030378.766579.48900@v33g2000cwv.googlegroups.com>


Stef Mientki wrote:
> Not sure I wrote the subject line correct,
> but the examples might explain if not clear
>
>
> *** first attempt ***
> class pin:
>    def __init__ (self):
>      self.Name  = 'Unknown Pin'
>
> aap = pin()             # create an instance
> aap.Name = 'aap'        # set it's name
> print aap.Name          # print it's name
> 			# but why should I set it's name ??
> print 'aap'		# I can just as well print a constant string !!
>                          # (ok there will be an extra check)
>
>
> *** second attempt ***
> class pin2:
>    def __init__ (self, naam):
>      self.Name  = naam
>
> aap2 = pin2('aap2')     # seems completely redundant to me.
> print aap2.Name
> print 'aap2'
>
>
> Can this be achieved without redundancy ?
>

Uhm.. if your code can work with a constant then creating an object to
hold it as an attribute is redundant.

If on the other hand you want an object to hold several attributes, and
methods for working with them, and then want to pass these objects
around your code with a single reference - then maybe an object is the
best way.

If you don't need custom classes then don't use them...

Fuzzyman
http://www.voidspace.org.uk/python/articles.shtml

> thanks,
> Stef Mientki



From fairwinds at eastlink.ca  Mon Jan  1 10:08:30 2007
From: fairwinds at eastlink.ca (David Pratt)
Date: Mon, 01 Jan 2007 11:08:30 -0400
Subject: Collecting list of module dependencies
In-Reply-To: <17817.8145.709408.736456@montanaro.dyndns.org>
References: <45991BE2.2010803@eastlink.ca>
	<17817.8145.709408.736456@montanaro.dyndns.org>
Message-ID: <459923EE.40303@eastlink.ca>

Hi skip. Many thanks for this. Exactly what I need :-)

Regards,
David

skip at pobox.com wrote:
>     David> Hi. Is anyone aware of any code to create a list of dependent
>     David> modules for a python module.
> 
> modulefinder: http://docs.python.org/lib/module-modulefinder.html
> 
> Added to Python in 2.3.
> 
> Skip
> 


From Thomas.Ploch at gmx.net  Wed Jan  3 11:29:00 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Wed, 03 Jan 2007 17:29:00 +0100
Subject: C/C++, Perl, etc. to Python converter
In-Reply-To: <1167839629.435980.311750@k21g2000cwa.googlegroups.com>
References: <G3Qmh.94$9v1.124@nntpserver.swip.net>
	<1167839629.435980.311750@k21g2000cwa.googlegroups.com>
Message-ID: <459BD9CC.1060702@gmx.net>

Matimus schrieb:
> I don't know of a converter, one may exist. I have seen similar
> requests though and will give you a similar response to what I have
> seen. A converter, if it exists, may be able to produce working code
> but _not_ readable code. Python is a language whose strength comes
> from, among other things, its readability and conventions. Learning
> python is best done by using the online documentation
> (http://docs.python.org/tut/tut.html) and reading existing code (take a
> look at the built in modules).
> 
> My biggest fear of teaching someone to program by using a program to
> convert perl to python is that they will end up writing python that
> still looks like perl.
> 
> I don't know if it helps, but I know others will give you similar
> advice.
> 
> -Matt
> 

I think that it *is* possible to do it, but a whole lot of work had to
be done to achieve this. It is all about how many rules (like how to
convert this block of unreadable code of language X into a readable
python block) you are willing to find/program (and these are a lot). It
is a almost gigantic task to make this work proper, but it definitely
*is* possible.

Something like this doesn't exist yet, but people (especially
Computational Linguists) are working on this.

Thomas


From nmm1 at cus.cam.ac.uk  Wed Jan 24 16:22:43 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 24 Jan 2007 21:22:43 GMT
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep8gue$3tu$1@panix3.panix.com>
Message-ID: <ep8in3$9em$1@gemini.csx.cam.ac.uk>


In article <ep8gue$3tu$1 at panix3.panix.com>,
aahz at pythoncraft.com (Aahz) writes:
|> 
|> My response is that you're asking the wrong questions here.  Our database
|> server locked up hard Sunday morning, and we still have no idea why (the
|> machine itself, not just the database app).  I think it's more important
|> to focus on whether you have done all that is reasonable to make your
|> application reliable -- and then put your efforts into making your app
|> recoverable.

Absolutely!  Shit happens.  In a well-designed world, that would not be
the case, but we don't live in one.  Until you have identified the cause,
you can't tell if threading has anything to do with the failure - given
what we know, it seems likely, but what Aahz says is how to tackle the
problem WHATEVER the cause.


Regards,
Nick Maclaren.


From wolf_tracks at invalid.com  Sun Jan  7 11:22:07 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sun, 07 Jan 2007 16:22:07 GMT
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <w03oh.46$_k2.22@read3.inet.fi>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>	<mailman.2332.1168016502.32031.python-list@python.org>	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>	<yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>
	<mailman.2367.1168100759.32031.python-list@python.org>
	<fK_nh.25689$QU1.17301@newssvr22.news.prodigy.net>
	<w03oh.46$_k2.22@read3.inet.fi>
Message-ID: <P69oh.32493$Gr2.29258@newssvr21.news.prodigy.net>

Jussi Salmela wrote:
> W. Watson kirjoitti:
>> Thomas Ploch wrote:
> <snip>
> 
>>> https://sourceforge.net/projects/pywin32/
>>>
>>> I think this is the place to go
>>>
>>> Thomas
>>>
>>>
>> That gets me the python program (pywin), which I got from a URL in a 
>> post above (python-win.msi). I guess these are the same or at least 
>> just the interpreter, and do not provide the IDE-debugger. I can't get 
>> pythonwin, the debugger and IDE. The link was broken last night when I 
>> tried it. Well, let me try now. Nope, it still reports "Error 404: 
>> File Not Found"
> 
> 
> I don't understand your difficulties. If you've got Python installed and 
> want to install the "Python for Windows extensions" aka pywin32, the 
> above link is the way to go.
> 
> Clicking it gets you to a Sourceforge page, where you can click 
> "download" which gets you to ap page where you can choose which version 
> of pywin32 build 210 you want. Choose the exe that was built for the 
> Python version (e.g. 2.5) you are using, download and run it to install 
> pywin32.
> 
> HTH,
> Jussi
As I understand it, there are two files I'm after: 1. python interpreter, 
and 2. a python editor. It's #2 that I'm having trouble downloading. The 
link is broken.


          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

              ""I do not fear death. I had been dead for billions
                and billions of years before I was born, and had
                not suffered the slightest inconvenience from it."
                    -- Mark Twain (a nod to evolution)
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From jmfbahciv at aol.com  Wed Jan 10 09:31:36 2007
From: jmfbahciv at aol.com (jmfbahciv at aol.com)
Date: Wed, 10 Jan 07 14:31:36 GMT
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
	<sfop5f7iqbcn$.fbeygwxvfsx0.dlg@40tude.net>
Message-ID: <eo2tc8$8qk_015@s808.apx1.sbo.ma.dialup.rcn.com>

In article <sfop5f7iqbcn$.fbeygwxvfsx0.dlg at 40tude.net>,
   zoara <me17 at privacy.net> wrote:
>On 9 Jan 2007 06:58:15 -0800, octabox at gmail.com wrote:
>
>> Hello all,
>> 
>> I represent Octabox, an Internet Start-up developing a wide-scale
>> platform for Internet services.  We are very interested to know your
>> thoughts on Internet productivity and how it might be improved, and to
>> that end we have set up a short survey at our website -
>> http://www.octabox.com/productivity_poll.php
>> We would very much appreciate if you would take a couple of minutes to
>> fill it up and influence our direction and empahsis.
>
>Well, that was too tempting to pass up. Amusing answers related to dirty
>bastard time-wasting spammers duly entered and submitted.

My hope is that one of these groups of kids will learn from
the nose-wiping service a.f.c. gives them and we get a query
back full of curiosity.  It is ironic that these ads ask
for expert help and then get rude when it's given.

/BAH


From paddy3118 at netscape.net  Tue Jan  9 01:16:08 2007
From: paddy3118 at netscape.net (Paddy)
Date: 8 Jan 2007 22:16:08 -0800
Subject: Colons, indentation and reformatting. (2)
Message-ID: <1168323368.592642.314130@i15g2000cwa.googlegroups.com>

I was just perusing a Wikipedia entry on the "off side rule" at
http://en.wikipedia.org/wiki/Off-side_rule .
It says that the colon in Python is purely for readability, and cites
our FAQ entry
http://www.python.org/doc/faq/general.html#why-are-colons-required-fo...
 .
However, near the top of the Alternatives section, it states that for C
type, curly braces using languages:
  "An advantage of this is that program code can be automatically
reformatted and neatly indented without fear of the block structure
changing".

Thinking about it a little, it seems that a colon followed by
non-indented code that has just been pasted in could also be used by a
Python-aware editor as a flag to re-indent the pasted code.

Tell me it is not so, or I will be editing the Wikipedia page I think.

- Paddy.



From michele.simionato at gmail.com  Wed Jan 31 14:17:04 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 31 Jan 2007 11:17:04 -0800
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <1170260637.679856.39920@k78g2000cwa.googlegroups.com>
References: <1170260637.679856.39920@k78g2000cwa.googlegroups.com>
Message-ID: <1170271023.955808.314010@q2g2000cwa.googlegroups.com>

On Jan 31, 5:23 pm, "Frank Potter" <could.... at gmail.com> wrote:
> I want to find a multithreaded downloading lib in python,
> can someone recommend one for me, please?
> Thanks~

Why do you want to use threads for that? Twisted is the
obvious solution for your problem, but you may use any
asynchronous framework, as for instance the good ol
Tkinter:

"""
Example of asynchronous programming with Tkinter. Download 10 times
the same URL.
"""

import sys, urllib, itertools, Tkinter

URL = 'http://docs.python.org/dev/lib/module-urllib.html'

class Downloader(object):
    chunk = 1024

    def __init__(self, urls, frame):
        self.urls = urls
        self.downloads = [self.download(i) for i in range(len(urls))]
        self.tkvars = []
        self.tklabels = []
        for url in urls:
            var = Tkinter.StringVar(frame)
            lbl = Tkinter.Label(frame, textvar=var)
            lbl.pack()
            self.tkvars.append(var)
            self.tklabels.append(lbl)
        frame.pack()

    def download(self, i):
        src = urllib.urlopen(self.urls[i])
        size = int(src.info()['Content-Length'])
        for block in itertools.count():
            chunk = src.read(self.chunk)
            if not chunk: break
            percent = block * self.chunk * 100/size
            msg = '%s: downloaded %2d%% of %s K' % (
                self.urls[i], percent, size/1024)
            self.tkvars[i].set(msg)
            yield None
        self.tkvars[i].set('Downloaded %s' % self.urls[i])

if __name__ == '__main__':
    root = Tkinter.Tk()
    frame = Tkinter.Frame(root)
    downloader = Downloader([URL] * 10, frame)
    def next(cycle):
        try:
            cycle.next().next()
        except StopIteration:
            pass
        root.after(50, next, cycle)
    root.after(0, next, itertools.cycle(downloader.downloads))
    root.mainloop()


    Michele Simionato



From robin at reportlab.com  Wed Jan 17 11:05:03 2007
From: robin at reportlab.com (Robin Becker)
Date: Wed, 17 Jan 2007 16:05:03 +0000
Subject: 2.3-2.5 what improved?
In-Reply-To: <17838.13871.896086.9204@montanaro.dyndns.org>
References: <45ADFACC.6080807@chamonix.reportlab.co.uk>
	<17838.13871.896086.9204@montanaro.dyndns.org>
Message-ID: <45AE492F.9000504@chamonix.reportlab.co.uk>

skip at pobox.com wrote:
>     Robin> I sort of remember claims being made about 2.5 being 10% faster
>     Robin> than 2.4/2.3 etc etc. Can anyone say where the speedups were?
> 
> What's New might be enlightening:
> 
>     http://www.google.com/search?q=what%27s+new+site%3Apython.org
> 
> Skip
thanks

-- 
Robin Becker



From gagsl-py at yahoo.com.ar  Wed Jan 10 23:24:03 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 01:24:03 -0300
Subject: SubProcess _make_inheritable
In-Reply-To: <OF06074433.08D4CD75-ONC125725F.00585860-C125725F.0058D2DC@
	br-automation.com>
References: <OF06074433.08D4CD75-ONC125725F.00585860-C125725F.0058D2DC@br-automation.com>
Message-ID: <7.0.1.0.0.20070111011800.03d03258@yahoo.com.ar>

At Wednesday 10/1/2007 13:10, Roland Puntaier wrote:

>SubProcess.py needs to be patched - at least in 2.4 -  to work from
>windows GUIs:
>
>         def _make_inheritable(self, handle):
>             """Return a duplicate of handle, which is inheritable"""
>             if handle==None: handle=-1
>             return DuplicateHandle(GetCurrentProcess(), handle,
>                                    GetCurrentProcess(), 0, 1,
>                                    DUPLICATE_SAME_ACCESS)

You should submit it to the tracker, not post here and hope someone 
would notice...
http://sourceforge.net/tracker/?group_id=5470

Anyway, I don't see in which case would handle be None.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From martin at v.loewis.de  Fri Jan 12 03:00:24 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 12 Jan 2007 09:00:24 +0100
Subject: Python 2.5 install on Gentoo Linux: failed dmb and _tkinter
In-Reply-To: <mailman.2581.1168530360.32031.python-list@python.org>
References: <mailman.2581.1168530360.32031.python-list@python.org>
Message-ID: <45a74018$0$10291$9b622d9e@news.freenet.de>

Sorin Schwimmer schrieb:
>> Did you add /usr/local/lib to /etc/ld.so.conf?
> 
> It's there

It is it also listed with "ldconfig -p"?

Regards,
Martin


From jstroud at mbi.ucla.edu  Tue Jan 30 18:48:37 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 30 Jan 2007 15:48:37 -0800
Subject: how to "free" an object/var ?
In-Reply-To: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
Message-ID: <epolgl$8i4$1@zinnia.noc.ucla.edu>

Stef Mientki wrote:
> If I create a large array of data or class,
> how do I destroy it (when not needed anymore) ?
> 
> Assign it to an empty list ?
> 
> thanks,
> Stef Mientki

It will be gc'd when you leave the scope or you can call del() to 
explicitly get rid of the object if its existence bothers you.

James


From gonzlobo at gmail.com  Fri Jan 19 17:53:47 2007
From: gonzlobo at gmail.com (gonzlobo)
Date: Fri, 19 Jan 2007 15:53:47 -0700
Subject: How to comment code?
In-Reply-To: <45b13876$0$323$e4fe514c@news.xs4all.nl>
References: <45b13876$0$323$e4fe514c@news.xs4all.nl>
Message-ID: <be5994b50701191453m39fd381m9027beea3d9885c7@mail.gmail.com>

If it's hard to write, it should be hard to read! :)

On 1/19/07, Martin P. Hellwig <mhellwig at xs4all.nl> wrote:
> Hi all,

(snip)
> However since I'm learning more of python I've struggled with
> commenting, how should I've comment my code
(snip)


From steven.bethard at gmail.com  Sun Jan  7 23:24:23 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 07 Jan 2007 21:24:23 -0700
Subject: how to find the longst element list of lists
In-Reply-To: <45a1b4da$1@nntp0.pdx.net>
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
	<m2mz4ul1tk.fsf@unique.fqdn> <45a1b4da$1@nntp0.pdx.net>
Message-ID: <LNmdnWZrirPsWjzYnZ2dnUVZ_rHinZ2d@comcast.com>

Scott David Daniels wrote:
> Dan Sommers wrote:
>> ...
>>     longest_list, longest_length = list_of_lists[ 0 ], len( 
>> longest_list )
>>     for a_list in list_of_lists[ 1 : ]:
>>         a_length = len( a_list )
>>         if a_length > longest_length:
>>             longest_list, longest_length = a_list, a_length
>> will run faster than sorting the list just to pick off one element (O(n)
>> vs. O(n log n) for all of you Big-Oh notation fans out there; you know
>> who you are!).
> 
> Or, more succinctly, after:
>     list_of_lists = [["q", "e", "d"],
>                      ["a", "b"],
>                      ["a", "b", "c", "d"]]
> You can find the longest with:
>     maxlength, maxlist = max((len(lst), lst) for lst in list_of_lists)
> or (for those pre-2.5 people):
>     maxlength, maxlist = max([(len(lst), lst) for lst in list_of_lists])

Generator expressions worked in 2.4 too. If you're using 2.5, you should 
take advantage of the key= argument to max and skip the generator 
expression entirely::

     >>> list_of_lists = [["q", "e", "d"],
     ...                  ["a", "b"],
     ...                  ["a", "b", "c", "d"]]
     >>> maxlist = max(list_of_lists, key=len)
     >>> maxlist, len(maxlist)
     (['a', 'b', 'c', 'd'], 4)

STeVe


From wolfgang.grafen at marconi.com  Tue Jan 16 07:17:25 2007
From: wolfgang.grafen at marconi.com (Wolfgang Grafen)
Date: Tue, 16 Jan 2007 13:17:25 +0100
Subject: How to convert float to sortable integer in Python
In-Reply-To: <1168939312.223194.184770@l53g2000cwa.googlegroups.com>
References: <1168939312.223194.184770@l53g2000cwa.googlegroups.com>
Message-ID: <eoidte$9cb$1@newsfeed.pit.comms.marconi.com>

shellon wrote:
> Hi all:
>     I want to convert the float number to sortable integer, like the
> function float2rawInt() in java, but I don't know the internal
> expression of float, appreciate your help!
> 
You should know you can sort mixed float/integer values in Python
 >>> l=[3,2.3,1.45,2,5]
 >>> l.sort()
 >>> l
[1.45, 2, 2.2999999999999998, 3, 5]

to convert a float to int use the built-in int function:

 >>> int(2.34)
2

Hope this helps

regards

Wolfgang


From garyjefferson123 at yahoo.com  Thu Jan 25 00:32:25 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: 24 Jan 2007 21:32:25 -0800
Subject: logging module and doctest
Message-ID: <1169703145.393435.166020@m58g2000cwm.googlegroups.com>

I've written a logging.filter and would like to use doctest on it
(using a StreamHandler for stdout), but this doesn't seem possible.
Output from the logger seems to disappear (running the doctest strings
through the interpreter as-is yields expected results).  I assume this
is because doctest does something with logging.  Is there any way to
make these work together?

Gary



From sebastien.thur at laposte.net  Tue Jan  9 03:06:15 2007
From: sebastien.thur at laposte.net (seb)
Date: 9 Jan 2007 00:06:15 -0800
Subject: line duplication using logging to file
Message-ID: <1168329975.491514.282000@11g2000cwr.googlegroups.com>

Hi, I am writing to a file some basic information using the logging
module.  It is working but in the log file some line are printed
several time. I had put some print debugging messages in the logging
function (so they appear on the consile) and they are called once only.
Obviously there is some understantding of the logging module that I am
missing.

My simple logging program (see below) is called by several processes.
In this way I can collect the information from various sources (and not
use the network enabled logging module)

I am using python 2.4 on WinXP SP2.

Do you have any idea ? Thanks in advance.

Seb.

*****************************************
The very simple "logging program ":
*****************************************
import logging, logging.handlers
import time

def write_log(level, message):
	# Utilisation de l'API pour le Handler global
	print "time.asctime()",time.asctime(),"received level=",level,"message
=",message
	nom_logger="main_log_file"
	logger=logging.getLogger(nom_logger)
	logger.setLevel(logging.DEBUG)
	prefix = "pix_main_log_file"
	#fh=logging.handlers.RotatingFileHandler(prefix + "_log.txt", 'a',
1000000,10)
	fh=logging.FileHandler("main_log.txt")
	fh.setLevel(logging.DEBUG)
	#formater = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s
- %(message)s")
	formater = logging.Formatter("%(asctime)s -  %(levelname)s -
%(message)s")
	fh.setFormatter(formater)
	logger.addHandler(fh)
	#logger.info("***************************** debut")


	#message = main(url,conf_file,logger)
	#message="hello seb"
	if str(level).lower() == "info" :
		print "logger info"
		logger.info(str(message))
	elif str(level).lower() =="error":
		print "logger error"
		logger.error(str(message))
	elif str(level).lower()=="warning" :
		print "logger warning"
		logger.warning(str(message))
	elif str(level).lower() =="critical":
		print "logger critical"
		logger.critical(str(message))
	elif str(level).lower() == "exception":
		print "logger exception"
		logger.exception(str(message))
	else :
		logger.info("niveau inconnu "+str(message))

	print "_________",message
	#print dir(logger)
	return

*************************************************
Example of the log file with duplicated line.
**************************************************

2007-01-08 18:26:19,578 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version
simple\thread_RS232.py___init_rs232initrs232_openCOM1
2007-01-08 18:26:19,578 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version
simple\thread_RS232.py___run____thread lance
2007-01-08 18:26:19,578 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version
simple\thread_RS232.py___run____thread lance
2007-01-08 18:26:32,015 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:26:32,015 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:26:32,015 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:26:42,483 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:26:42,483 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:26:42,483 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:26:42,483 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:26:53,750 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:26:53,750 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:26:53,750 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:26:53,750 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:26:53,750 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:03,092 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:03,092 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:03,092 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:03,092 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:03,092 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:03,092 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:13,671 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:13,671 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:13,671 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:13,671 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:13,671 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:13,671 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:13,671 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-08 18:27:14,796 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-08 18:27:14,796 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-08 18:27:14,796 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-08 18:27:14,796 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-08 18:27:14,796 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-08 18:27:14,796 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-08 18:27:14,796 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-08 18:27:14,796 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-08 18:27:14,890 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-08 18:27:14,890 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-08 18:27:14,890 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-08 18:27:14,890 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-08 18:27:14,890 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-08 18:27:14,890 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-08 18:27:14,890 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-08 18:27:14,890 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-08 18:27:14,890 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-09 08:51:26,562 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version
simple\thread_RS232.py___init_rs232initrs232_openCOM1
2007-01-09 08:51:26,733 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version
simple\thread_RS232.py___run____thread lance
2007-01-09 08:51:26,733 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version
simple\thread_RS232.py___run____thread lance
2007-01-09 08:51:39,453 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:51:39,453 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:51:39,453 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:51:48,280 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:51:48,280 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:51:48,280 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:51:48,280 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:51:58,750 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:51:58,750 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:51:58,750 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:51:58,750 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:51:58,750 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:09,812 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:09,812 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:09,812 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:09,812 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:09,812 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:09,812 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:19,078 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:19,078 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:19,078 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:19,078 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:19,078 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:19,078 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:19,078 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\Client_tests.py___test1TEST
1 = OK
2007-01-09 08:52:22,078 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-09 08:52:22,078 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-09 08:52:22,078 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-09 08:52:22,078 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-09 08:52:22,078 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-09 08:52:22,078 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-09 08:52:22,078 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-09 08:52:22,078 -  WARNING - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___run___fin
dans le run car continue = 0
2007-01-09 08:52:22,125 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-09 08:52:22,125 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-09 08:52:22,125 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-09 08:52:22,125 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-09 08:52:22,125 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-09 08:52:22,125 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-09 08:52:22,125 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-09 08:52:22,125 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret
2007-01-09 08:52:22,125 -  INFO - C:\Documents and
Settings\test\Bureau\xmlrpc\version simple\thread_RS232.py___stopthread
demande d'arret


**************************
Program calling the log :
***************************
import appel_log
.....

message = "something"
nom_function_actuelle= str(sys._getframe().f_code.co_filename)
+"___"+str(sys._getframe().f_code.co_name)
appel_log.write_log("info",nom_function_actuelle+message)
................



From Andreas.Ames at comergo.com  Thu Jan 11 03:40:09 2007
From: Andreas.Ames at comergo.com (Ames Andreas)
Date: Thu, 11 Jan 2007 09:40:09 +0100
Subject: dynamic library loading, missing symbols
Message-ID: <552B6B925278EF478EA8887D7F9E5AC301C8C5FD@tndefr-ws00024.tenovis.corp.lan>

> -----Original Message-----
> From: python-list-bounces+andreas.ames=comergo.com at python.org 
> [mailto:python-list-bounces+andreas.ames=comergo.com at python.or
> g] On Behalf Of dfj225 at gmail.com
> Sent: Wednesday, January 10, 2007 8:52 PM
> Subject: Re: dynamic library loading, missing symbols
> 
> I suppose this means that any subsequent libraries dlopened will not
> see any of the symbols in my module?

Have you already checked the output of LD_DEBUG=all or sth. like that?


cheers,

aa

-- 
Andreas Ames | Programmer | Comergo GmbH |
Voice:  +49 711 13586 7789 | ames AT avaya DOT com


From david at boddie.org.uk  Wed Jan 31 13:51:56 2007
From: david at boddie.org.uk (David Boddie)
Date: 31 Jan 2007 10:51:56 -0800
Subject: DCOP memory leak?
In-Reply-To: <1170265582.892012.69290@v45g2000cwv.googlegroups.com>
References: <1170193025.867274.242350@m58g2000cwm.googlegroups.com>
	<qsqdnaZ8iZ52QSLYnZ2dnUVZ_o2vnZ2d@comcast.com>
	<1170265582.892012.69290@v45g2000cwv.googlegroups.com>
Message-ID: <1170269516.158040.38450@s48g2000cws.googlegroups.com>

On Jan 31, 6:46 pm, "TimD... at gmail.com" <TimD... at gmail.com> wrote:

> The code I posted is not my actual program and was only to demonstrate
> my problem. The complete program I'm writing uses QT and so the loop
> is replaced by a Timer event.
> I tried out the suggestion. I had already tried the del dcop
> instruction, so I knew that wasn't it. I also placed the DCOP variable
> outside my loop but that didn't help either.

You might get a precise answer to your question if you send a message
to the PyQt/PyKDE mailing list:

  http://mats.imk.fraunhofer.de/mailman/listinfo/pykde

The original authors and contributors of various Python DCOP modules
read that list, so there's a chance they can either solve your problem
or offer some advice on how to work around it.

> What I did notice that my program only grew in memory use when the
> 'ok, Ms = AmarokDcopRes.player.trackCurrentTimeMs() ' code was
> executed (or any other function using the AmarokDcopRes variable like
> 'ok, volume = AmarokDcopRes.player.getVolume()' )

Do you find the same problem with other DCOP interfaces?

David



From sigzero at gmail.com  Wed Jan 17 13:54:54 2007
From: sigzero at gmail.com (Robert Hicks)
Date: 17 Jan 2007 10:54:54 -0800
Subject: *POLL* How many sheeple believe in the 911 fairy tale and
	willingto accept an Orwellian doublespeak and enslavement world ?
In-Reply-To: <mailman.2842.1169059827.32031.python-list@python.org>
References: <mailman.2842.1169059827.32031.python-list@python.org>
Message-ID: <1169060094.242970.268770@51g2000cwl.googlegroups.com>

<snip>
>
> Regards,
>
> Barry
> barry.carroll at psc.com
> 541-302-1107
> ________________________
> We who cut mere stones must always be envisioning cathedrals.
>
> -Quarry worker's creed

Sure, but did you actually post your phone number on USENET?

Robert



From laurent.pointal at limsi.fr  Wed Jan 10 04:20:55 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 10 Jan 2007 10:20:55 +0100
Subject: Establishing if an Object is Defined
In-Reply-To: <1168420616.285450.306460@k58g2000hse.googlegroups.com>
References: <1168420616.285450.306460@k58g2000hse.googlegroups.com>
Message-ID: <eo2btc$pcg$2@upsn250.cri.u-psud.fr>

bg_ie at yahoo.com a ?crit :
> Hi,
> 
> The following code works -
> 
> one = 1
> if one == 1:
>   ok = 1
> print ok
> 
> but this does not, without exception -
> 
> one = 2
> if one == 1:
>   ok = 1
> print ok
> 
> How do I establish before printing ok if it actually exists so as to
> avoid this exception?

ok = 0
...do the job...

Very simple, failure-proof, no special case.




From anthonydevine69 at hotmail.com  Fri Jan 12 12:40:15 2007
From: anthonydevine69 at hotmail.com (tonydevlin)
Date: Fri, 12 Jan 2007 09:40:15 -0800 (PST)
Subject: ArchGenXML please help
In-Reply-To: <45a7bc70$0$299$426a34cc@news.free.fr>
References: <8301441.post@talk.nabble.com>
	<45a7bc70$0$299$426a34cc@news.free.fr>
Message-ID: <8302734.post@talk.nabble.com>




Bruno Desthuilliers wrote:
> 
> tonydevlin a ?crit :
>> I am creating a workflow in plone using argouml and archgenxml.  I have
>> been
>> following the steps on the site:-
>> http://plone.org/documentation/tutorial/anonymously-adding-custom-content-types-with-argouml-and-archgenxml/creating-a-class-and-workflow-with-argouml
>> 
>> However I am confused at step 9 in creating the class section, where it
>> says:
>> "Now, save this file as "ProcessImprovement.zargo".  Pull up a command
>> prompt and navigate to that directory.  Make sure that you've added the
>> ArchGenXML directory to your env path, and type the following:
>> C:\Sandbox\Plone\Tutorial>ArchGenXML.py ProcessImprovement.zargo"
>> 
>> I have saved the file in the location 
>> C:\Documents and Settings\Tony\Desktop\Test\ProcessImprovement.zargo
>> However I dont know what to type in the python command prompt!!!
> 
> Which *python* command prompt ? The author is talking about a shell, 
> here (you know, this strange stuff that looks like good ole time DOS...).
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> 
> I yes sorry I was obviously not thinking properly, however there is still
> a problem, when I run this in dos after I have changed to the correct
> directory the ArchGenXML file that I downloaded does not work.  I renamed
> it from its original name because that did not work, it just came up with
> can not find program for it to run off.  It still does the same.
> 
> 

-- 
View this message in context: http://www.nabble.com/ArchGenXML-please-help-tf2966867.html#a8302734
Sent from the Python - python-list mailing list archive at Nabble.com.



From gonzlobo at gmail.com  Thu Jan 18 10:42:54 2007
From: gonzlobo at gmail.com (gonzlobo)
Date: Thu, 18 Jan 2007 08:42:54 -0700
Subject: variable scope
Message-ID: <be5994b50701180742l1db643c0h67925a2ae8d8de7c@mail.gmail.com>

Greetings,
I've been using Python to successfully parse files. When the entire
program was smaller, the variable firstMsg worked fine, but now
doesn't because it's used in function PID_MinMax. I know it's a result
of variables and their scope.

I declare the variable 'firstMsg = 0' in the main loop, pass it to the
function 'PID_MinMax(firstMsg, PID)'. When the function increments the
variable, it doesn't pass it back to the main program. What am I doing
wrong?


---- major snippage) ---
firstMsg = 0
skipHeader = 13

pPIDs = ['0321'] # hundreds more
pLen = len(pPIDs)
pMsgNum = pLen * [0]
pMax = pLen * [0]
pMin = pLen * [10]
pLast = pLen * [0]


def PID_MinMax(firstMsg, PID):
    idx = pPIDs.index(PID)
    pMsgNum[idx] += 1
    # Need to have 2 samples to determine Delta
    if firstMsg != 0:
        tDelta = tCurrent - pLast[idx]
        if tDelta > pMax[idx]:
            pMax[idx] = tDelta
        if tDelta < pMin[idx]:
            pMin[idx] = tDelta
    elif firstMsg == 0:
        firstMsg = 1
    pLast[idx] = tCurrent
    print pMin, pMax
    return firstMsg


############## main ##############
bf_file = file('bf_data/sByteflightLog_wISS.txt', 'r')
for line in bf_file:
    # skip header
    if skipHeader != 0:
        skipHeader -= 1
    # skip footer
    elif line == '\n':
        break
    else:
         raw_msg = line.split()
         tCurrent = int(raw_msg[0], 16) * 0.0001
         PID = raw_msg[2]

         if PID in pPIDs:
             PID_MinMax(firstMsg, PID)


From gagsl-py at yahoo.com.ar  Mon Jan  8 21:03:45 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 08 Jan 2007 23:03:45 -0300
Subject: Adding functions to classes after definition
In-Reply-To: <45A2E61F.2080100@andrew.cmu.edu>
References: <45A2E61F.2080100@andrew.cmu.edu>
Message-ID: <7.0.1.0.0.20070108224821.03ba5830@yahoo.com.ar>

At Monday 8/1/2007 21:47, Gerard Brunick wrote:

>Consider:  A)
>  >>> class C(object):
>...     pass
>...
>  >>> def f(*args):
>...     print args
>...
>  >>> C.f = f
>  >>> C.f
><unbound method C.f>
>  >>> c=C()
>  >>> c.f()
>(<__main__.C object at 0x04A51170>,)
>
>And B)
>
>  >>> del c
>  >>> C.f = types.MethodType(f, None, C)
>  >>> C.f
><unbound method C.f>
>  >>> c = C()
>  >>> c.f()
>(<__main__.C object at 0x04A51290>,)
>
>I don't understand A).  It is my vague understanding, that methods are
>really properties that handle binding on attribute access, so B) should
>be the "right" way to add a method to a class after definition.

This is implemented using descriptors. A function object has a __get__ method:

py> f.__get__
<method-wrapper object at 0x00BC8990>
py> C.__dict__['f'] is f
True
py> C.f is f
False
py> C.f.im_func is f
True

So, when you assign C.f=f, nothing special happens; but when the 
function is retrieved from the class, the __get__ method is invoked, 
returning an "unbound method".

>   Why does
>A show up as a method?  Shouldn't it still just be a function?  Certainly
>when you define a class, there is some magic in the __new__ method that
>turns functions in the initial dictionary into methods, but does this still
>happen for all setattr after that?

There's nothing special in __new__ (relating to this, at least). Nor 
even when setting the attribute; the magic happens when you *get* the 
method as an attribute of the class object. Functions don't even have 
a __set__:

py> f.__set__
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
AttributeError: 'function' object has no attribute '__set__'


>Is is possible to set a class attribute
>equal to a regular (types.FunctionType) function?

Yes, that's what actually happens. It's not easy to *retrieve* it 
later without getting a MethodType.

>Any references that discuss these issues would be greatly appreciated.

Descriptors are documented somewhere... I think they came in Python 
2.2 along with new-style classes.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From http  Sun Jan  7 22:30:05 2007
From: http (Paul Rubin)
Date: 07 Jan 2007 19:30:05 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
	<pan.2007.01.07.22.10.37.701405@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xlkke19he.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> > If you want to write bug-free code, pessimism is the name of the game.
> 
> I wonder whether Paul uses snow chains all year round, even in the blazing
> summer? After all, "if you want to drive safely, pessimism is the name of
> the game".

No.  I'm willing to accept a 10**-5 chance of hitting a freak
snowstorm in summer, since I drive in summer at most a few hundred
times a year, so it will take me 100's of years before I'm likely to
encounter such a storm.  There are millions of drivers, so if they all
take a similar chance, then a few times a year we'll see in the paper
that someone got caught in a storm, which is ok.  Usually there's no
real consequence beyond some inconvenience of waiting for a tow truck.

Tow truck or ambulance operators, on the other hand, should keep
chains available all year around, since they have to service the needs
of millions of users, have to be ready for freak summer storms.

As a software developer wanting to deploy code on a wide scale, I'm
more like a tow truck operator than an individual car driver.
Alternatively, as a coder I "drive" a lot more often.  If some Python
misfeature introduces a bug with probability 10**-5 per line of code,
then a 100 KLoc program is likely to have such a bug somewhere.  It
doesn't take 100's of years.


From anthra.norell at vtxmail.ch  Mon Jan 15 15:07:07 2007
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Mon, 15 Jan 2007 21:07:07 +0100
Subject: Type casting a base class to a derived one?
In-Reply-To: <4866bea60701110641n5eb4cc57uf5967aebcfd7790d@mail.gmail.com>
References: <mailman.2571.1168518354.32031.python-list@python.org>	<slrneqcgve.1n0.horpner@FIAD06.norwich.edu>
	<4866bea60701110641n5eb4cc57uf5967aebcfd7790d@mail.gmail.com>
Message-ID: <45ABDEEB.5020509@vtxmail.ch>

Chris Mellon wrote:
> On 11 Jan 2007 15:01:48 +0100, Neil Cerutti <horpner at yahoo.com> wrote:
>   
>> On 2007-01-11, Frederic Rentsch <anthra.norell at vtxmail.ch> wrote:
>>     
>>> If I derive a class from another one because I need a few extra
>>> features, is there a way to promote the base class to the
>>> derived one without having to make copies of all attributes?
>>>
>>> class Derived (Base):
>>>    def __init__ (self, base_object):
>>>       # ( copy all attributes )
>>>       ...
>>>
>>> This looks expensive. Moreover __init__ () may not be available
>>> if it needs to to something else.
>>>
>>> Thanks for suggestions
>>>       
>> How does it make sense to cast a base to a derived in your
>> application?
>>
>>     
>
> I can't figure out any circumstance when you'd need to do this in
> Python. Upcasting like this is something you do in statically typed
> languages. I suspect that the OP doesn't really believe dynamic
> casting works and doesn't want to pass a derived class for some
> reason.
>   
What for? If an instance needs to collect a substantial amount of data 
and needs to perform a substantial amount of processing in order to 
analyze that data, and if the appropriate type of the instance depends 
on the analysis, I thought that the instance might at that point just 
kind of slip into the appropriate identity.
      After studying the various helpful suggestions, some of which, 
like this one, question the wisdom of such an approach, I think I see 
the light: I'd have a class that does the collecting and the analyzing, 
or even two classes: one collecting the other analyzing and then, 
depending on the outcome of the analysis, make the appropriate processor 
and hand it the data it needs. Right?
     
Thank you all very much for your input.

Frederic (OP)




From http  Sun Jan  7 07:09:13 2007
From: http (Paul Rubin)
Date: 07 Jan 2007 04:09:13 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
Message-ID: <7xmz4v11jq.fsf@ruckus.brouhaha.com>

"Felipe Almeida Lessa" <felipe.lessa at gmail.com> writes:
> What is the chance of having to inherit from two classes from
> different modules but with exactly the same name *and* the same
> instance variable name?
> 
> Of course you're being very pessimistic or extremely unlucky.

If you want to write bug-free code, pessimism is the name of the game.


From frank at niessink.com  Mon Jan 29 14:14:21 2007
From: frank at niessink.com (Frank Niessink)
Date: Mon, 29 Jan 2007 20:14:21 +0100
Subject: wxPython StatusBar Help
In-Reply-To: <45bdfdc3$0$6722$426a74cc@news.free.fr>
References: <45bdfdc3$0$6722$426a74cc@news.free.fr>
Message-ID: <67dd1f930701291114y1a8bcb75t56579e76a7295205@mail.gmail.com>

2007/1/29, herve <h-broutin at bordeaux-port.fr>:
>
>
> Does anybody know how to change the foreground colors in a wx.StatusBar



wx.StatusBar is a subclass of wx.Window so SetForegroundColour should
work...

Cheers, Frank

PS: In general, wxPython related questions are best asked on the
wxPython-users mailinglist (see http://www.wxpython.org/maillist.php).
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070129/d4525a44/attachment.html>

From steve at REMOVE.THIS.cybersource.com.au  Mon Jan  8 17:30:13 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 09 Jan 2007 09:30:13 +1100
Subject: how to find the longst element list of lists
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
	<m2mz4ul1tk.fsf@unique.fqdn>
	<pan.2007.01.08.10.29.29.887201@REMOVE.THIS.cybersource.com.au>
	<entf0l$fmo$00$1@news.t-online.com>
Message-ID: <pan.2007.01.08.22.30.12.775492@REMOVE.THIS.cybersource.com.au>

On Mon, 08 Jan 2007 13:55:40 +0100, Peter Otten wrote:

>> The precise results depend on the version of Python you're running, the
>> amount of memory you have, other processes running, and the details of
>> what's in the list you are trying to sort. But as my test shows, sort has
>> some overhead that makes it a trivial amount slower for sufficiently small
>> lists, but for everything else you're highly unlikely to beat it.
> 
> Try again with tN.timeit(1) and a second list that is random.shuffle()d and
> copied to L before each measurement. list.sort() treats already sorted
> lists specially.

Or, simply shuffle the list itself. Why copy it?

In my tests, sorting still wins, and by roughly the same factor.

One optimization that might shift the balance would be to remove the
list copying in the non-sort code (list_of_lists[1:]). That's going to be
very time consuming for big lists.


-- 
Steven.



From collinstocks at gmail.com  Thu Jan 11 21:41:55 2007
From: collinstocks at gmail.com (Collin Stocks)
Date: Thu, 11 Jan 2007 21:41:55 -0500
Subject: os.popen() not executing command on windows xp
In-Reply-To: <7.0.1.0.0.20070111210043.01ce28c8@yahoo.com.ar>
References: <1168508553.151827.261420@k58g2000hse.googlegroups.com>
	<1168509560.119819.78470@o58g2000hsb.googlegroups.com>
	<1168535370.211599.265250@p59g2000hsd.googlegroups.com>
	<7.0.1.0.0.20070111210043.01ce28c8@yahoo.com.ar>
Message-ID: <4c0048df0701111841r1552ef46oad4e291b8d6969ae@mail.gmail.com>

I have no clue what is wrong. If all else fails, use os.system() instead of
os.popen(). Pipes tend not to always work in windows.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070111/d31dcc9f/attachment.html>

From martin at v.loewis.de  Mon Jan 22 16:37:59 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 22 Jan 2007 22:37:59 +0100
Subject: mmap caching
In-Reply-To: <45B51C1B.2000705@designaproduct.biz>
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>	<45B3DD4D.3010009@v.loewis.de>	<1169422167.683707.264180@a75g2000cwd.googlegroups.com>
	<45B3FDA7.9030702@v.loewis.de>
	<45B51C1B.2000705@designaproduct.biz>
Message-ID: <45B52EB7.5030608@v.loewis.de>

Laszlo Nagy schrieb:
> 
>> In fact, memory that is read in because of mmap should *never* cause
>> a MemoryError. 
> This is certainly not true. You can run out of virtual address space by
> reading data from a memory mapped file.

That is true, but not what I said. I said you cannot run out of memory
*while reading it*. You can only run out of virtual address space when
you invoke mmap.mmap itself (and when the application later tries to
allocate more virtual address space through VirtualAlloc).

>> Python calls MapViewOfFile when mmap.mmap is invoked,
>> at which point the operating commits to providing that much address
>> space to the application, along with backing storage on disk
>> (typically, from the file being mapped, unless it is an anonymous
>> map). Later access to the mapped range cannot fail (except for
>> hardware errors), and if it would, you wouldn't see a MemoryError.
>>   
> Hmm, maybe I'm wrong. Are you sure that Windows allocates the size of
> the whole file in terms of memory address space?

Yes, I am. See MapViewOfFile, at

http://msdn2.microsoft.com/en-us/library/aa366761.aspx

"Mapping a file makes the specified portion of a file visible in the
address space of the calling process."

Notice allocating address space doesn't consume much memory (it
consumes a little memory for the page tables).

>  I also wrote a program
> before (in Delphi). That program was playing a memory mapped wave file.
> From the task manager, I have seen that "used memory" was growing as the
> program was playing the wave file. For me, this indicates that Windows
> extends the mapped address space in chunks.

You are misinterpreting the data. I'm not sure what precisely
"used memory" is, most likely it is the working set of the process, i.e.
the amount the number of physical pages that are allocated for the
process. That is typically much smaller than the address space, since
many pages will be paged out (or not yet read in at all).

You need to display the virtual address space in the task manager
to determine how much address space the application is using.

Regards,
Martin


From skip at pobox.com  Wed Jan 31 16:49:13 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 31 Jan 2007 15:49:13 -0600
Subject: SyntaxError: 'return' outside function
In-Reply-To: <1170278702.599741.212420@l53g2000cwa.googlegroups.com>
References: <1170278702.599741.212420@l53g2000cwa.googlegroups.com>
Message-ID: <17857.3801.331748.605998@montanaro.dyndns.org>


    Melih> Has anyone seen this error before and been able to solve it? I
    Melih> can't seem to find anything that leads to a solution.

Your code is incorrectly indented.  Try:

    def legiturl(self, url):
    # this breaks down the url into 6 components to make sure it's "legit"
        t = urlparse.urlparse(url)

        if t[0] != 'http':
            return ""

        # remove URL fragments, but not URL
        if len(t[5]) > 0:
            url = urlparse.urlunparse((t[0],t[1],t[2],"","",""))
            t = urlparse.urlparse(url)

        # stupid parser sometimes leaves frag in path
        x = find(t[2], '#')
        if x >= 0:
            return ""

instead.  Note also the lack of a return at the end of the function.

Skip


From steve at REMOVE.THIS.cybersource.com.au  Sat Jan  6 02:59:31 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 06 Jan 2007 18:59:31 +1100
Subject: program deployment
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
	<12psqtppgi5cme6@corp.supernews.com>
	<1168010377.179056.220500@s80g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.06.07.59.31.521693@REMOVE.THIS.cybersource.com.au>

On Fri, 05 Jan 2007 07:19:37 -0800, king kikapu wrote:

> 
> 
>> > Are they embarassed by their code?
> 
> hehehe...no, just worried about stealing their ideas...

I don't understand... how can they steal an idea? If somebody copies your
idea, you've still got it, it's not gone.

-- 
Steven.



From tinaweb at bestemselv.com  Wed Jan 17 00:48:52 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Wed, 17 Jan 2007 06:48:52 +0100
Subject: PyQt: QListviewItemIterator
In-Reply-To: <54a5f$45ad62a8$54d1d767$17614@news.chello.no>
References: <K4ydnVE5x8iEjzDYRVnzvA@telenor.com>
	<54a5f$45ad62a8$54d1d767$17614@news.chello.no>
Message-ID: <lrmdnZb6J69YJTDYRVnzvQ@telenor.com>

David Boddie wrote:
> 
> When it.current() returns None. You can rewrite what you already
> have like this:
> 
>  it = QListViewItemIterator(self.authListView)
>  while it.current():
>      item = it.current()
>      if item.text(0).contains(filterString) or \
>         item.text(1).contains(filterString) or \
>         item.text(2).contains(filterString):
> 
>          item.setVisible(1)
>      else:
>          item.setVisible(0)
>      it += 1
> 
> If you don't like calling item.current() twice for some reason,
> you could write this:
> 
>  it = QListViewItemIterator(self.authListView)
>  item = it.current()
>  while item:
>      if item.text(0).contains(filterString) or \
>         item.text(1).contains(filterString) or \
>         item.text(2).contains(filterString):
> 
>          item.setVisible(1)
>      else:
>          item.setVisible(0)
>      it += 1
>      item = it.current()
> 
> David

Ah, of course!
Thanks!!

Tina


From sjmachin at lexicon.net  Mon Jan  1 20:20:10 2007
From: sjmachin at lexicon.net (John Machin)
Date: 1 Jan 2007 17:20:10 -0800
Subject: Writing more efficient code
References: <mailman.2185.1167676577.32031.python-list@python.org>
Message-ID: <1167700810.404307.148620@k21g2000cwa.googlegroups.com>

gonzlobo wrote:
> Greetings, and happyNewYear to all.
>
> I picked up Python a few weeks ago, and have been able to parse large
> files and process data pretty easily, but I believe my code isn't too
> efficient. I'm hoping dictionaries will help out, but I'm not sure the
> best way to implement them.
>
> I've been using a bunch of nested if/elif/else statements to select
> slices (0317 & 03de) from a file, then parse the data (aa, hh, bb,
> d2-d9) into parameters (a = airspeed, h = heading) & flags.
>
> #sample file contents
> 0000007d 03 0317 aa aa aa aa aa hh hh hh bb bb
> 0000007e 06 03de d2 d3 d4 d5 d6 d7 d8 d9 10 11

Do you have the original file from which this hex dump was made? It may
be a lot easier to write the code to pick that apart using the struct
module's unpack function than fiddling with the hex dump. It would
probably run faster as well.

>
> # some pseudo code
> if PID == '03de':
>     flapsCmd = int(d3, 16)
>    if flapsCmd == 0xc0:
>       <flaps up code>
>    elif flapsCmd == 0x03:
>       <flaps down code>
> if PID == '0317':
>    airspeed == 'combine aa for airspeed & multiply by 0.1'

*five* bytes for airspeed? Are they ascii characters e.g. "01234"
meaning 123.4?

>    heading == 'combine hh for heading'
>    mach == 'combine bb for mach & multiply by 0.01'
>
> Might dictionaries help in this case... say Label0317(parameterName,
> slice (d3), scaleFactor(0.1))... I'd like to use them if they'll
> replace the dozens of nested conditionals.  I have roughly 75
> different parameters to decode from a file containing ~2.5 million
> lines of data.
>
> I know my pseudo code lacks details, but hopefully I'm getting my
> point across...

It would help if you gave some more precise info on what format the
individual fields can take.

Cheers,
John



From tidegenerator at tom.com  Tue Jan 30 03:50:29 2007
From: tidegenerator at tom.com (tidegenerator at tom.com)
Date: 30 Jan 2007 00:50:29 -0800
Subject: How can I know both the Key c and Ctrl on the keyboard are pressed?
Message-ID: <1170147029.261981.322740@a75g2000cwd.googlegroups.com>

Hi;
How can I know the Key c and Ctrl on the keyboard are pressed? Or how 
to let the program press the

key Ctrl+c automatically? I just want to use python to develop a 
script program.
gear



From samuel.y.l.cheung at gmail.com  Mon Jan 22 18:32:58 2007
From: samuel.y.l.cheung at gmail.com (samuel.y.l.cheung at gmail.com)
Date: 22 Jan 2007 15:32:58 -0800
Subject: How to use time.clock() function in python
In-Reply-To: <mailman.3007.1169505266.32031.python-list@python.org>
References: <1169503516.425217.218790@q2g2000cwa.googlegroups.com>
	<mailman.3007.1169505266.32031.python-list@python.org>
Message-ID: <1169508778.101027.320760@11g2000cwr.googlegroups.com>

Thanks.

I have a fuction called 'func1'.

def func1:
     # logic of the function

When my script just call 'func1()' it works.
func1()

But when put it under timerit.Timer, like this:
t = timeit.Timer("func1()","")
t.repeat(1, 10)

# want to time how long it takes to run 'func1' 10 times, I get an
error like this:
  File "/usr/lib/python2.4/timeit.py", line 188, in repeat
    t = self.timeit(number)
  File "/usr/lib/python2.4/timeit.py", line 161, in timeit
    timing = self.inner(it, self.timer)
  File "<timeit-src>", line 6, in inner
NameError: global name 'func1' is not defined

I don't understand why i can't find 'func1', when I call the function
'func1' directly, it works.
but why when I call it within 'timeit', it can't find it?

Thank you.





Gabriel Genellina wrote:
> At Monday 22/1/2007 19:05, yinglcs at gmail.com wrote:
>
> >I am following this python example trying to time how long does an
> >operation takes, like this:
> >
> >My question is why the content of the file (dataFile) is just '0.0'?
> >I have tried "print >>dataFile, timeTaken" or "print >>dataFile,str(
> >timeTaken)", but gives me 0.0.
> >Please tell me what am I missing?
> >
> >
> >         t1 = time.clock()
> >         os.system(cmd)
> >
> >         outputFile = str(i) + ".png"
> >
> >         t2 = time.clock()
> >
> >         timeTaken = t2 - t1
> >         allTimeTaken += timeTaken
> >         print >>dataFile, timeTaken
>
> time.clock() may not give you enough precision; see this recent post
> http://mail.python.org/pipermail/python-list/2007-January/422676.html
> Use the timeit module instead.
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
>
>
>
>
>
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya! 
> http://www.yahoo.com.ar/respuestas



From wasadmin at optonline.net  Tue Jan 30 20:49:43 2007
From: wasadmin at optonline.net (Tequila)
Date: 30 Jan 2007 17:49:43 -0800
Subject: PythonCard
In-Reply-To: <mailman.3328.1170199585.32031.python-list@python.org>
References: <1170193549.583822.156450@k78g2000cwa.googlegroups.com>
	<mailman.3328.1170199585.32031.python-list@python.org>
Message-ID: <1170208183.438605.151800@j27g2000cwj.googlegroups.com>

On Jan 30, 6:26 pm, s... at pobox.com wrote:
>     Tequila> I'm having some trouble starting PythonCard on my PC.  I've
>     Tequila> downloaded and ran python-2.5.msi to install Python on my
>     Tequila> machine.  And PythonCard-0.8.2.win32.exe to install PythonCard.
>     ...
>     Tequila>     import wx
>     Tequila> ImportError: No module named wx
>
>     Tequila> Does anyone know what the problem might be?
>
> Sorta looks like you need to install wxPython.  In fact, the Windows
> instructions for PythonCard mention downloading wxPython before downloading
> PythonCard itself:
>
>    http://pythoncard.sourceforge.net/windows_installation.html
>
> If you're confident wxPython *is* installed, check to make sure it's
> installed somewhere that Python will find it.
>
> Skip

Yeah, ummm... ok so, I overlooked the Windows install instructions 
(thanks for the tip Gabriel :-)

Once I installed wxPython all is good.

Thanks for everything all!!

Teq



From robert.kern at gmail.com  Thu Jan  4 22:46:12 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 04 Jan 2007 21:46:12 -0600
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
Message-ID: <enkhm9$7qf$1@sea.gmane.org>

jeremito wrote:
> I am writing a class that is intended to be subclassed.  What is the
> proper way to indicate that a sub class must override a method?

raise NotImplementedError

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From Bob.Sidebotham at gmail.com  Fri Jan 12 10:10:06 2007
From: Bob.Sidebotham at gmail.com (Bob.Sidebotham at gmail.com)
Date: 12 Jan 2007 07:10:06 -0800
Subject: context managers and generators
References: <1168611420.448058.163860@11g2000cwr.googlegroups.com>
	<mailman.2646.1168613499.32031.python-list@python.org>
Message-ID: <1168614604.273032.173650@51g2000cwl.googlegroups.com>

Jean-Paul Calderone wrote:
> On 12 Jan 2007 06:17:01 -0800, bob.sidebotham at gmail.com wrote:
> >I'm happily using context managers and co-routines, and would like to
> >use both at the same time, e.g.
>
> Python has generators, not co-routines.

They may be called generators, but I'm using them as co-routines.

> Wrap the generator in a function which co-operates with your context
> managers to clean-up or re-instate whatever they are interacting with
> whenever execution leaves or re-enters the generator.

I don't think wrapping the generator will do it. I think I would have
to wrap the actual yield call. Maybe that wouldn't be so bad.

There's not even any guarantee, by the way, that the yield even
returns: an exception outside the generator will not trigger the
exception in the context manager. In general, there is no hook (that I
can see) that helps with this.

I'm still thinking there is a better way to do it, and would appreciate
any ideas.

Bob



From van.lindberg at gmail.com  Thu Jan 11 17:24:34 2007
From: van.lindberg at gmail.com (VanL)
Date: Thu, 11 Jan 2007 16:24:34 -0600
Subject: Intellectual Property Talk at PyCon
Message-ID: <eo6df3$9li$1@sea.gmane.org>

I will be presenting a talk at PyCon, "The Absolute Minimum an Open 
Source Developer Needs to Know About Intellectual Property."  I want to 
tailor this talk so that it is interesting to as many attendees as possible.

I am familiar with a lot of the internal divisions in the Free 
Software/Open Source community.  My intent is not to advocate for or 
against any specific position, but rather to promote a common 
understanding and address specific situations that developers may 
encounter.  In other words, a problem/solution approach, instead of an 
argumentative approach.

With that in mind, I had in mind the following subjects:

- A brief primer on intellectual property (what are patents, trademarks, 
copyrights, and trade secrets?)

- What to do when you have an idea you want to develop, but you are 
working for somebody else

- What it means to incorporate GPL'd modules into your own code

- Ways to protect ideas that you have put into a proprietary software 
product

- Ways to avoid, work around, or mitigate the effect of software patents

- Licensing, using, and distributing software (comparing and contrasting 
the GPL, BSD, and Python licenses)

I am interested in hearing about 1) other topics of interest, and 2) the 
relative level of interest in each topic.  To keep within the time 
limits for my talk, I intend to address the most popular topics in 
roughly the order of their popularity.


Thanks,

Van Lindberg



From aahz at pythoncraft.com  Thu Jan 25 10:26:13 2007
From: aahz at pythoncraft.com (Aahz)
Date: 25 Jan 2007 07:26:13 -0800
Subject: My Tkinter Threading nightmare
References: <1169693266.209082.323310@a75g2000cwd.googlegroups.com>
	<7xac07wzh2.fsf@ruckus.brouhaha.com>
	<1169726320.703566.272120@k78g2000cwa.googlegroups.com>
	<7xejpjuvwe.fsf@ruckus.brouhaha.com>
Message-ID: <epai6l$i9h$1@panix3.panix.com>

In article <7xejpjuvwe.fsf at ruckus.brouhaha.com>,
Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
>
>   self.progressWindow.protocol('WM_DELETE_WINDOW', self.callback)
>
>becomes
>
>   gui.cmd_queue.put(self.progressWindow.protocol,
>                      ('WM_DELETE_WINDOW', self.callback))
>
>where gui is the Window object containing your gui.
>
>I think there are some recipes like this in ASPN, that give more
>detail about how to do this stuff.

You can find a simple example at http://pythoncraft.com/ in the threads
tutorial.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From arkanes at gmail.com  Mon Jan  8 21:17:30 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 8 Jan 2007 20:17:30 -0600
Subject: Fwd: Execute binary code
In-Reply-To: <7.0.1.0.0.20070108194009.03993008@yahoo.com.ar>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<EOSdneXxmrS6OT_YnZ2dnUVZ_q7inZ2d@comcast.com>
	<1168289145.319706.199950@11g2000cwr.googlegroups.com>
	<4866bea60701081251we2bf7f3vb55a285ee20e91f6@mail.gmail.com>
	<mailman.2447.1168289572.32031.python-list@python.org>
	<1168290090.137259.324360@i15g2000cwa.googlegroups.com>
	<7.0.1.0.0.20070108194009.03993008@yahoo.com.ar>
Message-ID: <4866bea60701081817l7a7ccaa2nabdaff12e4d2c4a4@mail.gmail.com>

On 1/8/07, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Monday 8/1/2007 18:01, citronelu at yahoo.com wrote:
>
> >Chris Mellon wrote:
> > > Writing to a temp file will be at least 3 times as easy and twice as
> > > reliable as any other method you come up with.
> >
> >I'm not disputing that, but I want to keep a piece of code (a parser
> >for Oracle binary dumps, that I didn't wrote) out of foreign hands, as
> >much as possible. Using a TEMP directory is not "stealth" enough.
>
> This is what I would do  (untested of course!) (Mostly using the
> Win32 API so you'll have to use pywin32 or ctypes).
>
> Call CreateFile with dwShareMode=0, FILE_ATTRIBUTE_TEMPORARY,
> FILE_FLAG_NO_BUFFERING, FILE_FLAG_DELETE_ON_CLOSE.
> That means that no other process could open the file, if it fits in
> available memory probably it won't even be written to disk, and it
> will be deleted as soon as it has no more open handles. File name
> does not have to end in .exe.
> Copy the desired contents into a buffer obtained from VirtualAlloc;
> then call WriteFile; release the buffer (rounding size up to next 4KB multiple)
> Then CreateProcess with CREATE_SUSPENDED, and CloseHandle on the
> file, and CloseHandle on the two handles returned on
> PROCESS_INFORMATION. At this stage, the only open handle to the
> temporary file is held by the section object inside the process.
> Then ResumeThread(hTread) -process begins running- and
> WaitForSingleObject(hProcess) -wait until finishes-.
> As soon as it finishes execution, the last handle to the file is
> closed and it is deleted.
>
> Another approach would be to go below the Windows API and use the
> native API function NtCreateProcess -officially undocumented- which
> receives a section handle (which does not have to be disk based). But
> this interfase is undocumented and known to change between Windows versions...
>
> Or search for a rootkit...
>
>
> --
> Gabriel Genellina
> Softlab SRL
>

Thats a lot of work to execute a binary image that can be trivially
recovered from the python source with 2 minutes of work (up to 15 if
you have to install Python and google for how to write to a file
first).


From michael at mustun.ch  Wed Jan  3 10:18:04 2007
From: michael at mustun.ch (mm)
Date: Wed, 03 Jan 2007 16:18:04 +0100
Subject: array of class / code optimization
In-Reply-To: <mailman.2221.1167763760.32031.python-list@python.org>
References: <mailman.2221.1167763760.32031.python-list@python.org>
Message-ID: <AOPmh.83$9v1.124@nntpserver.swip.net>


Yes, it was the (), equivalent to thiks like new() create new object 
from class xy.
>   s1.append(Word)
s1.append(Word())

But I was looking for a "struct" equivalent like in c/c++.
And/or "union". I can't find it.

Maybe you know a source (URL) "Python for c/c++ programmers" or things 
like that.


Yes, I konw whats an object is...


From ziade.tarek at gmail.com  Sat Jan  6 12:25:18 2007
From: ziade.tarek at gmail.com (=?ISO-8859-1?Q?Tarek_Ziad=E9?=)
Date: Sat, 6 Jan 2007 18:25:18 +0100
Subject: python, zlib, and fedora 64bits
In-Reply-To: <94bdd2610701060924s1a00ccc9r222e90e892665a05@mail.gmail.com>
References: <94bdd2610701060147i6725e52bgdcc3d81377366ecd@mail.gmail.com>
	<200701060402.25665.jonc@icicled.net>
	<94bdd2610701060222u3448213eyd9a66e167ed6eb92@mail.gmail.com>
	<94bdd2610701060924s1a00ccc9r222e90e892665a05@mail.gmail.com>
Message-ID: <94bdd2610701060925r34ea5a3bmb8d30ed8b160a485@mail.gmail.com>

On 1/6/07, Tarek Ziad? <ziade.tarek at gmail.com> wrote:
>
> I am answering to myself, if it can help someone else.
>
> zlib has to be recompiled with CFLAGS set to -fPIC.
>
> So before launching ./configure do a:
>
> export CFLAGS="-fPIC"
>
> Python then will build properly zlib.so
>
>
> Tarek




-- 
Tarek Ziad? | Association AfPy | www.afpy.org
Blog FR | http://programmation-python.org
Blog EN | http://tarekziade.wordpress.com/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070106/a652c554/attachment.html>

From dilbert01 at gmail.com  Thu Jan 18 07:29:41 2007
From: dilbert01 at gmail.com (alessandro)
Date: 18 Jan 2007 04:29:41 -0800
Subject: closing a "forever" Server Socket
Message-ID: <1169123381.930403.24170@38g2000cwa.googlegroups.com>

Hi all,

This is my framework for create TCP server listening forever on a port
and supporting threads:


import SocketServer

port = 2222
ip = "192.168.0.4"
server_address = (ip, port)

class ThreadingTCPServer(SocketServer.ThreadingMixIn,
SocketServer.TCPServer): pass

class Handler(SocketServer.BaseRequestHandler):
    def handle(self):
	# my handler

print "Listening for events at " + ip + ":" + str(port)
monitor_server = ThreadingTCPServer(server_address, Handler)

try:
    monitor_server.serve_forever()
except KeyboardInterrupt:
    monitor_server.socket.close()
    print "Bye."


This server will not run as a daemon and for quitting you have to send
the SIGINT signal with Ctrl-C. It will rise the KeyboardInterrupt
exception, during its handling I simply close the socket and print a
message.

I want to ask if someone knows a better way for closing a "forever
server" or if there is a lack in my design.

Thank you!

Alessandro



From webraviteja at gmail.com  Tue Jan  9 01:18:36 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 8 Jan 2007 22:18:36 -0800
Subject: private variables
In-Reply-To: <mailman.2463.1168321669.32031.python-list@python.org>
References: <mailman.2463.1168321669.32031.python-list@python.org>
Message-ID: <1168323516.333488.322310@i15g2000cwa.googlegroups.com>


belinda thom wrote:
> Hello,
>
> In what version of python were private variables added?
>
> Thanks,
>
> --b

Short answer - 1.5 (or - so long ago that it doesn't matter anymore)
Long answer - There are no true private variables in Python. Just
private variables names by convention.

See Python docs for a detailed explanation.

Ravi Teja.



From rweth at cisco.com  Sat Jan  6 15:44:06 2007
From: rweth at cisco.com (rweth)
Date: Sat, 06 Jan 2007 12:44:06 -0800
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5
In-Reply-To: <459f1703$0$24039$9b622d9e@news.freenet.de>
References: <mailman.2358.1168049310.32031.python-list@python.org>
	<459f1703$0$24039$9b622d9e@news.freenet.de>
Message-ID: <1168116247.370914@sj-nntpcache-1.cisco.com>

Martin v. L?wis wrote:
> Carroll, Barry schrieb:
>> What I want to know is:
>>
>> * has anyone else encountered a problem like this, * how was the
>> problem corrected, * can the fix be retro-fitted to 2.5 and 2.4?
> 
> From your description, I suspect an error in your code. Your description
> indicates that you don't expect to have more than five files open
> simultaneously. Yet, the error message "Too many open files" occurs when
> you open many more files (in the order of hundreds of files).
> 
> It is very unlikely that there is a bug in Python where it would fail to
> close a file when .close() is explicitly invoked on it (as your
> description suggests that you do), so if you get that error message, it
> can only mean that you fail to close some files.
> 
> Notice that you may have other files open, as well, and that those also
> count towards the limit.
> 
> As a debugging utility, you can use Sysinternal's process explorer.
> Make the program halt (not exit) when the exception occurs (e.g. by
> having it sleep(1) in a loop), then view all open handles in the
> process explorer (check the menu if it doesn't display them initially).
> 
> Regards,
> Martin

I agree with Martin .. this code to close is solid.

Make certain you are really closing the files when you think you should. 
I am pretty sure you are not. Look at the code that closes the files 
closely. Put a print statement in the block that is supposed to close 
the files (may bee even a raw_input("closing file" + afile)  statement).

My guess is that you won't see the print statements trigger when you 
though they should .. they may be out of "the loop" you thought that 
they were in.




From pydecker at gmail.com  Tue Jan  2 12:21:49 2007
From: pydecker at gmail.com (Peter Decker)
Date: Tue, 2 Jan 2007 12:21:49 -0500
Subject: DOS, UNIX and tabs
In-Reply-To: <kcmip2dt5h9s2r9p4unrei8ehcutj2kuu5@4ax.com>
References: <1167243140.687557.93320@f1g2000cwa.googlegroups.com>
	<emugom$t37$01$1@news.t-online.com>
	<pan.2006.12.28.03.22.21.587236@REMOVEME.cybersource.com.au>
	<mailman.2143.1167453331.32031.python-list@python.org>
	<en5e18$l39$03$1@news.t-online.com>
	<mailman.2163.1167518010.32031.python-list@python.org>
	<pan.2006.12.31.10.44.59.201060@gmx.net>
	<rolgp212fd1cshs8404v3c039he6hs4tvj@4ax.com>
	<en9v4k$4sg$2@lust.ihug.co.nz>
	<kcmip2dt5h9s2r9p4unrei8ehcutj2kuu5@4ax.com>
Message-ID: <ca55a9900701020921q15701311hd5b0ac6f81b00662@mail.gmail.com>

On 1/1/07, Tom Plunket <tomas at fancy.org> wrote:

> Maybe I'm also weird, but I use a variable-pitch font when programming
> in Python.  So a "tab equals some number of spaces" really isn't useful
> to me.  My setup is, "tab equals this much space".

A year ago I would have thought you were weird, but after reading a
post by Ed Leafe, one of the creators of Dabo about using proportional
fonts for readability, I thought I'd try it out, thinking that it was
pretty wacky. Turns out that after a very brief adjustment period, I
liked it! I've been using proportional fonts ever since, and have
found only one drawback: code that is indented with spaces looks
butt-ugly. I'm glad I switched to tabs for my code.

-- 

# p.d.


From gagsl-py at yahoo.com.ar  Fri Jan  5 04:05:58 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 05 Jan 2007 06:05:58 -0300
Subject: checking one's type
In-Reply-To: <E90C7F6E-5200-4553-9C39-8941999588B2@cs.hmc.edu>
References: <E90C7F6E-5200-4553-9C39-8941999588B2@cs.hmc.edu>
Message-ID: <7.0.1.0.0.20070105060049.05c1e270@yahoo.com.ar>

At Friday 5/1/2007 05:40, belinda thom wrote:

>I've been using the following hack to determine if a type is
>acceptable and I suspect there is a better way to do it:

This has been discussed today under the thread "Set type?", and a few 
days ago as "type classobj not defined".


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From phd at phd.pp.ru  Mon Jan 22 13:20:36 2007
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Mon, 22 Jan 2007 21:20:36 +0300
Subject: SQLObject 0.7.3b1
Message-ID: <20070122182036.GC8012@phd.pp.ru>

Hello!

I'm pleased to announce the 0.7.3b1 release of SQLObject.

What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite, and
Firebird.  It also has newly added support for Sybase, MSSQL and MaxDB (also
known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.7.3b1

News and changes:
http://sqlobject.org/docs/News.html


What's New
==========

Bug Fixes
---------

* Allow multiple MSSQL connections.

* Psycopg1 requires port to be a string; psycopg2 requires port to be an int.

* Fixed a bug in MSSQLConnection caused by column names being unicode.

* Fixed a bug in FirebirdConnection caused by column names having trailing
  spaces.

* Fixed a missed import in firebirdconnection.py.

* Remove a leading slash in FirebirdConnection.

For a more complete list, please see the news:
http://sqlobject.org/docs/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From bignose+hates-spam at benfinney.id.au  Wed Jan 24 19:52:22 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 25 Jan 2007 11:52:22 +1100
Subject: Question about docutils
References: <45b7fca1$0$49206$14726298@news.sunsite.dk>
Message-ID: <87hcug0vy1.fsf@benfinney.id.au>

Damjan <gdamjan at gmail.com> writes:

> I'm using docutils 0.4.

The specific mailing lists for docutils:

    <URL:http://docutils.sourceforge.net/docs/user/mailing-lists.html>

Also available via GMane, which is how I read them.

-- 
 \     "Here is a test to see if your mission on earth is finished. If |
  `\                       you are alive, it isn't."  -- Francis Bacon |
_o__)                                                                  |
Ben Finney



From dudds at netspace.net.au  Sat Jan 27 01:56:54 2007
From: dudds at netspace.net.au (dudds)
Date: 26 Jan 2007 22:56:54 -0800
Subject: wx Python event question
Message-ID: <1169881014.463339.257190@v45g2000cwv.googlegroups.com>

Hi I really haven't used wxPython before and I was just wondering if
there was some sort of timer event that can be used. For example if I
have a database that I want to query at regular intervals and display
the results in a window is that possibly to do under a wx Python
program?

So far I have come across certain event handlers, but they all seem to
wait for something to happen, like moving the mouse, clicking on a
button etc. I just want to display the results of a query every so
often automatically without having to press a button to do so.

I'm not looking for a complete solution as I'm doing this so I can
teach myself Python, but a bit of a hint or a nudge in the right
direction would be great.



From nogradi at gmail.com  Fri Jan 26 18:59:06 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sat, 27 Jan 2007 00:59:06 +0100
Subject: [ANN] markup.py 1.6 (bugfix: 1.6.1)
Message-ID: <5f56302b0701261559n7d12abe3pdb0951133d0c2b7b@mail.gmail.com>

> The new 1.6 release of markup.py is available for download:
>
> http://sourceforge.net/project/showfiles.php?group_id=161108
>
> What is it?
>
> Markup.py is an intuitive, lightweight, easy-to-use, customizable and
> pythonic HTML/XML generator.
>
> Where is the documentation?
>
> http://markup.sourceforge.net/
>
> Why is it called markup.py and not markup?
>
> This way it's easier to search for it online and also shows that it's
> a single module. Also note that the former Markup project of Edgewall
> changed its name to Genshi in the meantime.
>
> Please send comment/feedback/bugs/etc to nogradi at gmail.com


Ooooops, a bug was introduced in the latest release, in case you
downloaded version 1.6 please get version 1.6.1 which fixes it. Sorry,
I probably should do more testing before releasing stuff :)

Thanks very much to everyone who gave feedback!


From s.mientki at id.umcn.nl  Wed Jan 31 06:41:25 2007
From: s.mientki at id.umcn.nl (stef)
Date: Wed, 31 Jan 2007 12:41:25 +0100
Subject: another newbie question: why should you use "*args" ?
Message-ID: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>


why should I use *args,
as in my ignorance,
making use of a list (or tupple) works just as well,
and is more flexible in it's calling.
So the simple conclusion might be: never use "*args",
or am I overlooking something ?

# method 1
    def execute (self, *args):
        for i in range ( len(args) ):
            ... do something

# method 2
    def chunk_plot(self, list):
        for i in range ( len(list) ):
             .... do something


# calling method 1:
execute (S[0], S[4] )

# calling method 2:
execute ( ( S[0], S[4] ) )

# or *the extra flexibility)
mylist = ( S[0], S[4] )
execute ( mylist )


thanks,
Stef Mientki


From hg at nospam.org  Mon Jan 15 03:09:53 2007
From: hg at nospam.org (hg)
Date: Mon, 15 Jan 2007 09:09:53 +0100
Subject: check if there is data in stdin without blocking
Message-ID: <4PMqh.47441$X97.9536@newsfe18.lga>

Hi,

Is there a way ? ... select ?



hg



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan  8 15:00:04 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 08 Jan 2007 21:00:04 +0100
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk> <entj5d$o4$1@south.jnrs.ja.net>
	<entkru$2vs$1@gemini.csx.cam.ac.uk>
	<50f5snF1fb5uqU2@mid.individual.net>
	<entpo0$d0g$1@gemini.csx.cam.ac.uk>
	<50fdf9F1fki7dU3@mid.individual.net>
	<enu10l$s03$1@gemini.csx.cam.ac.uk>
Message-ID: <50fm64F1fotpdU2@mid.individual.net>

Nick Maclaren wrote:

> Not at all.  "Precision" has been used to indicate the number of
> digits after the decimal point for at least 60 years, 

Not only, remember: Computer memories can't think in powers of ten.

> probably 100; in 40 years of IT and using dozens of programming
> languages, I have never seen "display" used for that purpose.

Yes, but since the representation in computers is based on powers of
two, a certain precision in the dual system, i. e. a fixed amount
of dual places, doesn't correspond with a fixed amount of decimal
places. Thus the rounding while displaying -- just to make it look
prettier. The very minimal additional error is silently accepted.

Regards,


Bj?rn

-- 
BOFH excuse #199:

the curls in your keyboard cord are losing electricity.



From michael at mustun.ch  Wed Jan  3 10:50:27 2007
From: michael at mustun.ch (mm)
Date: Wed, 03 Jan 2007 16:50:27 +0100
Subject: code optimization (calc PI)
In-Reply-To: <5020j6F1du59cU1@mid.uni-berlin.de>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
Message-ID: <XgQmh.98$9v1.124@nntpserver.swip.net>


Hmm... it's a question. It was not that easy to translate this #@*?%! 
C-Program into readable code and then to Python. But it works.

There are only two while-loops (a while within an other while).

I konw, that for example while-loops in Perl are very slow. Maybe this 
is also known in Pyhton. Then, I can translate the while-loops in to 
for-loops, for example.
More general, maybe there is a speed optimazation docu out there.

(Anyway, this code for C-calc is complex. And I realy don't understand 
it right now... 8-)


But anyway, there is not that much calculation, it has more something to 
do with the too while-loops. Here is some code:

(In general, it has basically nothing to do with PI-calc.)


c=2800  ## a counter


while c*2:
    ## do some calc. did not change c here.
    ...


    b=c  ## number of elements

    while (b-1):
       ## so some calc.
       ...
       b=b-1 ## just for while-loop condition.


   c = c-14;  ## this is code vor the 1st while-loop, BUT bust run after 
the 2nd-while-loop.
   pi = pi + str("%04d" % int(e + d/a))  ## this should be fast?! I dont 
know.


There are a output string, a list, and integers. No complex data 
structures; and no complex calculations.



Diez B. Roggisch wrote:

> mm wrote:
> 
> 
>>(Yes, I konw whats an object is...)
>>BTW. I did a translation of a pi callculation programm in C to Python.
>>(Do it by your own... ;-)
> 
> 
> Is that a question on how to optimize code you won't show us? If yes, I'm
> sorry to tell you that crystal balls are short these days. Too much
> new-year-outlooks.
> 
> Diez


From bearophileHUGS at lycos.com  Mon Jan  1 16:33:49 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 1 Jan 2007 13:33:49 -0800
Subject: Writing more efficient code
In-Reply-To: <459959ea$0$8719$ed2619ec@ptn-nntp-reader02.plus.net>
References: <mailman.2185.1167676577.32031.python-list@python.org>
	<459959ea$0$8719$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <1167687229.430930.197720@v33g2000cwv.googlegroups.com>

Jon Harrop:
> OCaml's pattern matcher is very sophisticated and very fast. You'll probably
> shrink your code by several fold whilst also having it run a few orders of
> magnitude faster and having it statically checked, so it will be more
> reliable.

You seem to forget some months of time to learn OCaml.
And my Python programs seem reliable enough despite being unstatically
checked :-)


> You might want to look at any language with pattern matching: OCaml, SML,
> Haskell, F#, Mathematica etc.

Mathematica pattern matching is good, but Mathematica costs a lot of
money (and you need some time to learn it, it's not an easy system).

Bye,
bearophile



From aahz at pythoncraft.com  Wed Jan 31 22:12:59 2007
From: aahz at pythoncraft.com (Aahz)
Date: 31 Jan 2007 19:12:59 -0800
Subject: Any python scripts to do parallel downloading?
References: <mailman.3386.1170299364.32031.python-list@python.org>
Message-ID: <eprlrr$aee$1@panix3.panix.com>

In article <mailman.3386.1170299364.32031.python-list at python.org>,
Jean-Paul Calderone  <exarkun at divmod.com> wrote:
>
>You misunderstand.  I wasn't expressing a lack of confidence in Python
>threads, but in the facility with which they can be used by programmers.

Based on my admittedly limited experience, I say the same about Twisted.
Although I was able to bring up a Twisted 1.1 web server in a hurry under
extreme pressure (15 minutes before a PyCon presentation), I have never
been able to even get Twisted 2.0 installed.

Software is hard.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From steve at REMOVEME.cybersource.com.au  Mon Jan 22 19:14:30 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 23 Jan 2007 11:14:30 +1100
Subject: arrow keys don't work
References: <1169506381.452422.179070@11g2000cwr.googlegroups.com>
Message-ID: <pan.2007.01.23.00.14.29.144841@REMOVEME.cybersource.com.au>

On Mon, 22 Jan 2007 14:53:01 -0800, tac-tics wrote:

> I've noticed that in Python 2.5, the interactive prompt does not
> support intelligent use of arrow keys like 2.4 did (up/down for
> previous/next statement, left/right for moving the cursor). 

It works perfectly for me.

> What
> exactly is the reason for this and is there an easier fix than
> downgradinig to 2.4? Thanks.

Have you changed your terminal (either the program itself or its config)
so that it is no longer sending the correct codes?

When you hit the arrow key, what happens? Do you just get nothing at all,
or do you get control characters appearing? e.g. ^Z or similar.


-- 
Steven D'Aprano 



From horpner at yahoo.com  Tue Jan 16 07:51:21 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 16 Jan 2007 13:51:21 +0100
Subject: whats wrong with my reg expression ?
References: <ef60af090701151441j2dbc2308ka8f326a181b6bba8@mail.gmail.com>
	<7.0.1.0.0.20070115195902.05c75aa0@yahoo.com.ar>
	<mailman.2753.1168904594.32031.python-list@python.org>
Message-ID: <slrneqpin0.1r4.horpner@FIAD06.norwich.edu>

On 2007-01-15, Gert Cuykens <gert.cuykens at gmail.com> wrote:
> thx
>
> PS i also cant figure out what is wrong here ?
>
>         rex=re.compile('^"(?P<value>[^"]*)"$',re.M)
>         for v in l:
>             v=rex.match(v).group('value')
>             v=v.replace('""','"')
>         return(l)
>
>     v=rex.match(v).group('value')
> AttributeError: 'NoneType' object has no attribute 'group'

When the regex doesn't match, match returns None.

-- 
Neil Cerutti
Strangely, in slow motion replay, the ball seemed to hang in the air for even
longer. --David Acfield


From gagsl-py at yahoo.com.ar  Tue Jan 16 12:03:01 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 16 Jan 2007 14:03:01 -0300
Subject: arguments of a function/metaclass
References: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>
	<1168964835.087773.221950@s34g2000cwa.googlegroups.com>
Message-ID: <eoj0fm$udu$1@sea.gmane.org>

"goodwolf" <Robert.Katic at gmail.com> escribi? en el mensaje 
news:1168964835.087773.221950 at s34g2000cwa.googlegroups.com...
> A simply solution:
>
> def __init__(self, a=1, b=2, c=3, ......):
>    for key, val in locals().items():
>        if key != 'self':
>            setattr(self.__class__, key, val)
>
> in addition:
>
> def set(self, **kwarg):
>    for key in kwargs:
>        if hasattr(self.__class__, key):
>            setattr(self.__class__, key, kwargs[key])
>        else:
>            raise ....

Why setattr(self.__class__,...) instead of setattr(self, ...)? You're 
modifying the class attributes, and that's not usually intended.

-- 
Gabriel Genellina 




From http  Mon Jan  1 00:23:03 2007
From: http (Paul Rubin)
Date: 31 Dec 2006 21:23:03 -0800
Subject: I want to see all the variables
References: <s57lh.335$c46.311@newsfe05.lga> <45952426.1080800@websafe.com>
	<pan.2006.12.29.16.35.00.363156@REMOVE.THIS.cybersource.com.au>
	<8yelh.90$Q4.82@newsfe02.lga>
	<pan.2006.12.29.22.46.14.436601@REMOVE.THIS.cybersource.com.au>
	<FPylh.22$eq5.11@newsfe02.lga>
	<459722fc$0$30313$9b4e6d93@newsspool1.arcor-online.net>
	<pan.2006.12.31.02.56.19.358717@REMOVE.THIS.cybersource.com.au>
	<2v0hp2tbk8uq2pbqi6874b4tidbck2tpga@4ax.com>
	<pan.2007.01.01.05.14.12.260857@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xbqljnww8.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> > At the same time, you should ponder very
> > carefully the reasons why the original author deemed it important to
> > make those attributes private in the first place.
> 
> In my experience, it is mostly because they come from
> bondage-and-domination languages where it is expected that
> everything is private except for a small, carefully chosen public
> API, rather than from languages like Python that encourages openness
> and a philosophy of "we're all adults here".

Funny thing, some of those B&D languages were designed by people who
had plenty of experience with Lisp and were tired of being bitten by
its Python-like looseness.

> I wonder how many double-underscore "private" attributes are used in the
> Python standard library? That should give you an idea of "best practice"
> use of private attributes in Python.

If socket.py is an example of best practice use of private attributes,
I shudder to imagine what kind of cruft must lurk in legacy applications.


From me17 at privacy.net  Tue Jan  9 10:25:43 2007
From: me17 at privacy.net (zoara)
Date: Tue, 9 Jan 2007 15:25:43 +0000
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
Message-ID: <sfop5f7iqbcn$.fbeygwxvfsx0.dlg@40tude.net>

On 9 Jan 2007 06:58:15 -0800, octabox at gmail.com wrote:

> Hello all,
> 
> I represent Octabox, an Internet Start-up developing a wide-scale
> platform for Internet services.  We are very interested to know your
> thoughts on Internet productivity and how it might be improved, and to
> that end we have set up a short survey at our website -
> http://www.octabox.com/productivity_poll.php
> We would very much appreciate if you would take a couple of minutes to
> fill it up and influence our direction and empahsis.

Well, that was too tempting to pass up. Amusing answers related to dirty
bastard time-wasting spammers duly entered and submitted.

	-z-



-- 
Our team is conducting a benchmarking effort to gather an outside-in
view on development performance metrics and best practice approaches 
to issues of process and organization from companies involved in a 
variety of software development (and systems integration).


From jstroud at mbi.ucla.edu  Thu Jan 18 19:57:56 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 18 Jan 2007 16:57:56 -0800
Subject: Using lambda with a Pmw.ComboBox
In-Reply-To: <1169167034.200565.227900@a75g2000cwd.googlegroups.com>
References: <1169167034.200565.227900@a75g2000cwd.googlegroups.com>
Message-ID: <eop52k$tjf$1@zinnia.noc.ucla.edu>

Willie wrote:
> Hi,
> 
> I have an array of 2 ComboBoxes. I would like to use lambda to report
> on which widget is being accessed. When I use arrays of other widgets I
> just use lambda to return which item I am using as an argument. This
> does not seem to work with ComboBox, the only thing returned is the
> value changed.
> 
> Can someone refer me to some code which shows this in action? I have
> searched the web for a solution, without any luck.
> 
> Thanks,
> 
> Willie
> 

Can you show us your code? Your question is ambiguous to me. Comboboxes 
do not hold widgets but display text.


From bearophileHUGS at lycos.com  Fri Jan 19 05:59:14 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 19 Jan 2007 02:59:14 -0800
Subject: Match 2 words in a line of file
In-Reply-To: <1169175299.490994.244700@51g2000cwl.googlegroups.com>
References: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
	<1169166223.073714.109620@51g2000cwl.googlegroups.com>
	<1169172293.938820.103400@51g2000cwl.googlegroups.com>
	<1169172954.107365.133950@51g2000cwl.googlegroups.com>
	<1169175299.490994.244700@51g2000cwl.googlegroups.com>
Message-ID: <1169204354.494510.277840@v45g2000cwv.googlegroups.com>

Rickard Lindberg, yesterday I was sleepy and my solution was wrong.

> 2) If you have a line something like this: "foobar hello" then "'foo'
> in line" will return true, even though foo is not a word (it is part of
> a word).

Right. Now I think the best solution is to use __contains__ (in) to
quickly find the lines that surely contains both substrings, then on
such possibly rare cases you can use a correctly done RE. If the words
are uncommon enough, such solution may be fast and reliable.
Using raw tests followed by slow and reliable ones on the rare positive
results of the first test is a solution commonly used in Computer
Science, that often is both fast and reliable. (It breaks when the
first test is passed too much often, or when it has some false
negatives).

Probably there are even faster solutions, scanning the whole text at
once instead of inside its lines, but the code becomes too much hairy
and probably it's not worth it.

Bye,
bearophile



From arkanes at gmail.com  Mon Jan  8 12:27:54 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 8 Jan 2007 11:27:54 -0600
Subject: Suitability for long-running text processing?
In-Reply-To: <84fb38e30701080919r41d52fb6nc5ee31f12e901ef3@mail.gmail.com>
References: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>
	<c2701f5c0701080801w4d3c378elf901db19610a2e9e@mail.gmail.com>
	<84fb38e30701080813k1be616fch6d01922fb7a92fc5@mail.gmail.com>
	<c2701f5c0701080835o7013c43fm3e71e9b7d1a11329@mail.gmail.com>
	<4866bea60701080849h16d1dacew7a0abe950726c006@mail.gmail.com>
	<84fb38e30701080919r41d52fb6nc5ee31f12e901ef3@mail.gmail.com>
Message-ID: <4866bea60701080927r4dedd392o38d45660864a8717@mail.gmail.com>

On 1/8/07, tsuraan <tsuraan at gmail.com> wrote:
>
>
> > My first thought was that interned strings were causing the growth,
> > but that doesn't seem to be the case.
>
> Interned strings, as of 2.3, are no longer immortal, right?  The intern doc
> says you have to keep a reference around to the string now, anyhow.  I
> really wish I could find that thing I read a year and a half ago about
> python never collecting small strings, but I just can't find it anymore.
> Maybe it's time for me to go source diving...
>
>

I remember something about it coming up in some of the discussions of
free lists and better behavior in this regard in 2.5, but I don't
remember the details.

Interned strings aren't supposed to be immortal, these strings
shouldn't be automatically interned anyway (and my brief testing
seemed to bear that out) and calling _Py_ReleaseInternedStrings didn't
recover any memory, so I'm pretty sure interning is not the culprit.


From jstroud at mbi.ucla.edu  Mon Jan 22 18:38:01 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 22 Jan 2007 15:38:01 -0800
Subject: SQLObject 0.8.0b2
In-Reply-To: <mailman.2992.1169490156.32031.python-list@python.org>
References: <mailman.2992.1169490156.32031.python-list@python.org>
Message-ID: <ep3hsp$ah1$1@daisy.noc.ucla.edu>

Oleg Broytmann wrote:
> Hello!
> 
> I'm pleased to announce the 0.8.0b2 release of SQLObject.
> 
> 
> What is SQLObject
> =================
> 
> SQLObject is an object-relational mapper.  Your database tables are described
> as classes, and rows are instances of those classes.  SQLObject is meant to be
> easy to use and quick to get started with.
> 
> SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite, and
> Firebird.  It also has newly added support for Sybase, MSSQL and MaxDB (also
> known as SAPDB).
> 
> 
> Where is SQLObject
> ==================
> 
> Site:
> http://sqlobject.org
> 
> Development:
> http://sqlobject.org/devel/
> 
> Mailing list:
> https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss
> 
> Archives:
> http://news.gmane.org/gmane.comp.python.sqlobject
> 
> Download:
> http://cheeseshop.python.org/pypi/SQLObject/0.8.0b2
> 
> News and changes:
> http://sqlobject.org/devel/News.html
> 
> 
> What's New
> ==========
> 
> News since 0.8.0b1
> ------------------
> 
> * Another round of bugfixes for MySQL errors 2006 and 2013 (SERVER_GONE,
>   SERVER_LOST).
> 
> * Fixed a bug in MSSQLConnection caused by column names being unicode.
> 
> * Fixed a bug in FirebirdConnection caused by column names having trailing
>   spaces.
> 
> * Remove a leading slash in FirebirdConnection.
> 
> For a more complete list, please see the news:
> http://sqlobject.org/devel/News.html
> 
> Oleg.

This project has an amazingly impressive pace of development:

       10:20 AM : "SQLObject 0.7.3b1"
       10:22 AM : "SQLObject 0.8.0b2"

But I'm wondering, why is it taking so long for SQLObject 0.8.7b3?

James


From http  Wed Jan 24 22:35:05 2007
From: http (Paul Rubin)
Date: 24 Jan 2007 19:35:05 -0800
Subject: My Tkinter Threading nightmare
References: <1169693266.209082.323310@a75g2000cwd.googlegroups.com>
	<7x1wljajgg.fsf@ruckus.brouhaha.com>
Message-ID: <7xac07wzh2.fsf@ruckus.brouhaha.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>       def idle(self):
>          # read and execute any commands waiting on the queue
>          while True:
>             try:
>                func, args, kw = self.cmd_queue.get(block=False)
>             except QueueEmpty:
>                return
>             func (*args, **kw)

Whoops, I forgot, you have to set up the after event again at the end
of this:

       def idle(self):
          # read and execute any commands waiting on the queue
          while True:
             try:
                func, args, kw = self.cmd_queue.get(block=False)
             except QueueEmpty:
                return
             func (*args, **kw)
          self.after(20, self.idle)


From bdesth.quelquechose at free.quelquepart.fr  Fri Jan 12 18:22:08 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 13 Jan 2007 00:22:08 +0100
Subject: globals accros modules
In-Reply-To: <38388$45a6b867$d443bb3a$10089@news.speedlinq.nl>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>
	<mailman.2556.1168492539.32031.python-list@python.org>
	<3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>
	<45a66cea$0$289$426a34cc@news.free.fr>
	<3137a$45a6851a$d443bb3a$24085@news.speedlinq.nl>
	<45a69cca$0$321$426a74cc@news.free.fr>
	<38388$45a6b867$d443bb3a$10089@news.speedlinq.nl>
Message-ID: <45a811ba$0$291$426a34cc@news.free.fr>

Stef Mientki a ?crit :
> Bruno Desthuilliers wrote:
> 
>> Stef Mientki a ?crit :
>>
>>> Bruno Desthuilliers wrote:
>>>
>>>> stef a ?crit :
>>
>> (snip)
>>
>>>>> but tell them that they are going to loose all their globals ???
>>>>
>>>> It's a feature. Globals are definitively a BadThing(tm).
>>>
>>> yes, I know, but my audience will accept that only in the long term.
>>
>> Unless you clearly explain the benefits... Any code relying on the 
>> existence of a global is:
>> 1/ dependent on the existence of this global
>> 2/ harder to understand
> 
> And you think physicians will believe that ?

Aren't physicians supposed to be somewhat cartesians guys ? FWIW, 
functional languages are mostly used by peoples with a strong 
mathematical background...

> And suppose they believe it, are the willing to stop their research to 
> rethink and rewrite their code ;-)

Not my problem. But anyway, if they really hope to get reliable results, 
they'd better have bug-free programs, and using globals not only 
potentially introduces subtle bugs, but also makes code hardly 
unit-testable...

>>
>> FWIW, I'm currently fixing a simple Delphi program that's using quite 
>> a few globals,
> 
> Then it was certainly not written by a Delphi-guy ;-)

Yes it was. But that does not imply it was written by a competent 
Delphi-guy !-)

(snip)
>>
>> # another.py
>> import myglobs
>> print myglobs.meaning_of_life
>>
>>>
>>> <all other py-files in the project>
>>> import Ugly_MatLab_Globals
>>>
>>> def some_function():
>>>   import Ugly_MatLab_Globals
>>
>>
>> You don't have to reimport it here...
> 
> Then I miss something:

Probably

> TEN = 10
> TWELVE = 12
> def some_function():
>   global TEN
>   TEN = 9

rebinds the 'global' (well... module) name 'TEN'.

>   TWELVE = 11

creates a *local* name 'TWELVE' and bind it to integer 11.

>   print TEN, TWELVE
> 
> some_function()      #will print 9,11
> print TEN, TWELVE    #will print 9,12
> 
> Or am I mistaken ?

You are.

bruno at bibi playground $ cat myglobals.py
a = None
b = None
bruno at bibi playground $ cat useglobals.py
import myglobals

def test():
     myglobals.a = "meaning_of_life"
     myglobals.b = 42

print "myglobals.a : ", myglobals.a
print "myglobals.b : ", myglobals.b
test()
print "myglobals.a : ", myglobals.a
print "myglobals.b : ", myglobals.b

bruno at bibi playground $ python useglobals.py
myglobals.a :  None
myglobals.b :  None
myglobals.a :  meaning_of_life
myglobals.b :  42


From usenet200701 at tobyinkster.co.uk  Sun Jan 28 09:54:00 2007
From: usenet200701 at tobyinkster.co.uk (Toby A Inkster)
Date: Sun, 28 Jan 2007 14:54:00 +0000
Subject: Ip address
References: <mailman.3244.1169978684.32031.python-list@python.org>
Message-ID: <81qu84-b0l.ln1@ophelia.g5n.co.uk>

Scripter47 wrote:

> How do i get my ip address?

Which IP address. One computer might have many IP addresses. (Indeed a
typical network-connected computer will tend to have at least one for each
connected network device, plus the special address 127.0.0.1 for the
loopback network.) How is Python supposed to know which IP address you
want?

If you don't care which address, the code supplied by Adam should work. If
you do care, then you'll probably need to write OS-specific code for each
platform you choose to support, probably parsing the output of ipconfig
(Windows) or ifconfig (Linux/UNIX/Mac) somehow.

Adam also says:
| If you are wanting to to communicate over the internet you will have 
| to get the IP of you rounter.

Not strictly true, but if your network uses NAT, and you want some host
outside your network to be able to *connect to you*, then yes, you need the
IP address of your router. If you're not using NAT, then you shouldn't
need to worry about your router, as IP addresses alone provide full
end-to-end routing. (Indeed that's the whole point of IP.)

-- 
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact
Geek of ~ HTML/CSS/Javascript/SQL/Perl/PHP/Python*/Apache/Linux

* = I'm getting there!


From mail at microcorp.co.za  Wed Jan  3 01:27:20 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 3 Jan 2007 08:27:20 +0200
Subject: Writing more efficient code
References: <mailman.2185.1167676577.32031.python-list@python.org><459959ea$0$8719$ed2619ec@ptn-nntp-reader02.plus.net><1167687229.430930.197720@v33g2000cwv.googlegroups.com><459989ec$0$8759$ed2619ec@ptn-nntp-reader02.plus.net><1167699678.310643.140480@n51g2000cwc.googlegroups.com>
	<459b03e5$0$8725$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <015201c72f00$8d0d19e0$03000080@hendrik>

"Jon Harrop" <jon at ffconsultancy.com> wrote:


> I think that is an excellent idea. Who will pay me? ;-)

The same fellow who is paying you to post to this newsgroup...

- Hendrik



From ziade.tarek at gmail.com  Sat Jan  6 12:24:46 2007
From: ziade.tarek at gmail.com (=?ISO-8859-1?Q?Tarek_Ziad=E9?=)
Date: Sat, 6 Jan 2007 18:24:46 +0100
Subject: python, zlib, and fedora 64bits
In-Reply-To: <94bdd2610701060222u3448213eyd9a66e167ed6eb92@mail.gmail.com>
References: <94bdd2610701060147i6725e52bgdcc3d81377366ecd@mail.gmail.com>
	<200701060402.25665.jonc@icicled.net>
	<94bdd2610701060222u3448213eyd9a66e167ed6eb92@mail.gmail.com>
Message-ID: <94bdd2610701060924s1a00ccc9r222e90e892665a05@mail.gmail.com>

I am answering to myself, if it can help someone else.

zlib has to be recompiled with CFLAGS set to -fPIC.

So before launching ./configure do a:

export CFLAGS="-fPIC"

Python then will build properly zlib.so


Tarek
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070106/0fedffb6/attachment.html>

From google98.email at blogger.com  Sun Jan  7 22:59:55 2007
From: google98.email at blogger.com (Mr.Wiggly)
Date: Mon, 08 Jan 2007 03:59:55 GMT
Subject: *^*^*^*^8=====>   Sexy Bikini Video Downloads  <=====8*^*^*^*^*^*
Message-ID: <%kjoh.572086$5R2.443620@pd7urf3no>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070108/76ba70da/attachment.html>

From jzgoda at o2.usun.pl  Sat Jan 20 14:47:31 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Sat, 20 Jan 2007 20:47:31 +0100
Subject: Win GUI application: avoiding DOS console
In-Reply-To: <eotkr7$ffdf$1@zam602.zam.kfa-juelich.de>
References: <eotkr7$ffdf$1@zam602.zam.kfa-juelich.de>
Message-ID: <eotrll$475$1@atlantis.news.tpi.pl>

Siggi napisa?(a):

> how do I avoid the DOS console show-up when starting a WinXP GUI application 
> with mouseclick on the respective Python file?
> 
> I had this with my previous Python installation; it is very simple, 
> something with a "-i" somewhere in the open command of the  MS Windows data 
> types "PY" and "PYW". But after a new Python installation, this was lost, 
> and I cannot find the instruction what to do.

Run it using pythonw.exe instead of python.exe (check in file types
properties window).

-- 
Jarek Zgoda
http://jpa.berlios.de/


From durumdara at gmail.com  Tue Jan  2 04:04:43 2007
From: durumdara at gmail.com (durumdara)
Date: Tue, 02 Jan 2007 10:04:43 +0100
Subject: [Off] WXP Fingerprint + Python...
Message-ID: <459A202B.2080202@gmail.com>

Hi!

I have an application (Python + wx) somewhere.
The users use they fingerprint to log[in/out].
But we have a problem that in this time the fingerprint logon is do REAL 
windows logon, so every user need a windows user too, and many times it 
need to close/open application, and Windows.

We need better solution.
We tried MS Fingerprint Reader, but that is working in same method: it 
store the fingerprints for every Windows user...

I need something better. Do anyone knows about a Fingerprint Software 
and device that can recognize many-many fingerprints, and it can 
associate the actual fingerprint with a VIRTUAL(! not windows user! a 
virtual!) user that stored in a DB?
This DB can store other infos, or an ID that we can use in another app...
Or a software hook needed (DLL hook) that can add possibility to catch 
the login/outs, and I can do anything else as I need.

Do anyone knows about same solution or product?

Thanks for help:
    dd



From bigblueswope at gmail.com  Wed Jan 24 07:12:47 2007
From: bigblueswope at gmail.com (BJ Swope)
Date: Wed, 24 Jan 2007 07:12:47 -0500
Subject: smtplib starttls gmail example - comments?
In-Reply-To: <9afea2ac0701240256kae247b3s666be6529362c84e@mail.gmail.com>
References: <W63698683.410.134.1@mxextra>
	<9afea2ac0701240256kae247b3s666be6529362c84e@mail.gmail.com>
Message-ID: <fca207170701240412o1945fcedtc59257ff02bca9dc@mail.gmail.com>

On 1/24/07, Tim Williams <tim at tdw.net> wrote:
>
> On 24/01/07, py <py at th.on> wrote:
> > I would love for anybody to comment on this code with regard to
> redundancy/efficiency/wordiness or whatever else.
> > for instance, do i understand correctly that i cant have a try: else:
> without an intervening except:?
> > -dave
> >
> >         stdout.write("calling smtp server...")
> >         try:
> >             server = SMTP(msgsmtp)
> >         except:
> >             stdout.write("FAIL.")   #using .write to avoid the implied
> \n with print
> >         else:
> >             server.set_debuglevel(msgdebug)
> >             stdout.write("starting tls...")
> >             server.ehlo(msgfrom)
> >             try:    server.starttls()
> >             except: stdout.write("FAIL.")
> >             else:
> >                 server.ehlo(msgfrom)           #neessary duplication (?)
> >                 stdout.write("logging in...")
> >                 try:    server.login(msgfrom, msgpass)
> >                 except: stdout.write("FAIL.")
> >                 else:
> >                     stdout.write("sending...")
> >                     try:    server.sendmail(msgfrom, msgto, msgtxt +
> "\n.\n")
> >                     except: stdout.write("FAIL.")
> >                     else:
> >                         try:
> >                             server.quit()
> >                         except sslerror:      # a known and largely
> ignored issue with early EOF in ssl protocol
> >                             stdout.write("success.")
> >                         else:
> >                             stdout.write("success.")
> > --
>
>
> *** Not tested  but should have the same functionality and error
> handling as your script ***
>
> this_host = 'myhostname.mydom1.com'
> print "calling smtp server...", #  the trailing comma removes '\n'
> try:
>     server = smtplib.SMTP(msgsmtp,local_hostname=this_host)
>     server.set_debuglevel(msgdebug)
>     print "starting tls...",
>     server.starttls()
>     server.ehlo(this_host)  # RFC requirement for 2nd EHLO after
> requesting TLS
>     print "logging in...",
>     server.login(msgfrom, msgpass)
>     print "sending...",
>     failed = server.sendmail(msgfrom, msgto, msgtxt + "\n.\n")
>     try:
>         server.quit()
>     except: pass
>     print "success."
> except:
>     print "FAIL.",
>
> if failed:
>     print "failed:", failed  # some recipients, but not all of them,
> failed
> --
> http://mail.python.org/mailman/listinfo/python-list
>



Both examples have included the cardinal sin in smtp...

They both send the message text followed by new line dot new line.

The smtp protocol specifically mentions CRLF dot CRLF.   Please please
please use \r\n.\r\n in your code...

-- 
We are all slave to our own paradigm. -- Joshua Williams
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070124/9e3145f9/attachment.html>

From tomas at fancy.org  Mon Jan  8 20:09:57 2007
From: tomas at fancy.org (Tom Plunket)
Date: Mon, 08 Jan 2007 17:09:57 -0800
Subject: Non-blocking pipes during subprocess handling
Message-ID: <22q5q25jn7dfti18rv1tshj7os5a0gm27r@4ax.com>

I'm using subprocess to launch, well, sub-processes, but now I'm
stumbling due to blocking I/O.

Is there a way for me to know that there's data on a pipe, and possibly
how much data is there so I can get it?  Currently I'm doing this:

	process = subprocess.Popen(
		args,
		bufsize=1,
		universal_newlines=True,
		stdout=subprocess.PIPE,
		stderr=subprocess.PIPE)

	def ProcessOutput(instream, outstream):
		text = instream.readline()
		if len(text) > 0:
			print >>outstream, text,
			return True
		else:
			return False
			
	while process.poll() is None:
		ProcessOutput(process.stdout, sys.stdout)
		ProcessOutput(process.stderr, sys.stderr)

	# clean up everything to EOF once the process ends.
	somethingPrinted = True
	while somethingPrinted:
		somethingPrinted = ProcessOutput(
			process.stdout,	sys.stdout)
		somethingPrinted |= ProcessOutput(
			process.stderr, sys.stderr)


Unfortunately, stream.readline will block 'til it gets a line, and
typically there won't be anything on the stderr stream.  The reason for
the redirections in the first place is that I'm launching this script as
a subprocess from a GUI app that catches stdout and stderr and directs
the output to the appropriate windows, but in some cases I don't
actually want the output at all (I've removed that logic though since it
needlessly complicates my example; suffice to say everything below the
process = subprocess.Popen... line is enclosed in a try and then in an
if block.

The documentation on file.read() indicate that there's an option for
"non-blocking" mode, but I'm stumped as to how to even look for how to
enable and use that.

thanks,
-tom!

-- 


From kylotan at gmail.com  Tue Jan  9 07:14:34 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 9 Jan 2007 04:14:34 -0800
Subject: PyCFunction_New requires a pointer to a static PyMethodDef?
Message-ID: <1168344874.063070.324770@38g2000cwa.googlegroups.com>

In following the example given at
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/54352>, I find
that if I instead try to create PyMethodDef instances on the stack and
create methods that way, rather than providing pointers to a static
array of them, executing the method later raises an exception from
PyCFunction_Call.

Is it required that the PyMethodDef persists throughout the execution
of the Python program? If so, why isn't the information just copied
instead? I was hoping to just create a temporary PyMethodDef on the
stack purely for the duration of creating the method.

(Google doesn't find any instance of "PyCFunction_Call" on
docs.python.org. This might explain the Cookbook's comment that "one
hardly ever sees Python class objects built in C extensions"!)

-- 
Ben Sizer



From steve at holdenweb.com  Wed Jan 24 08:42:07 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 24 Jan 2007 13:42:07 +0000
Subject: sys.path issue in cygwin
In-Reply-To: <002401c73f8f$b9f7da90$14fd0179@WANGSHUHAO>
References: <002401c73f8f$b9f7da90$14fd0179@WANGSHUHAO>
Message-ID: <ep7nni$5op$2@sea.gmane.org>

Wang Shuhao wrote:
>  
>  
> I successfully built and installed Python 2.2.3 in cygwin. But there is 
> something wrong in the sys.path. I use following statments for a test.
>  
>  >>> import sys
>  >>> print sys.path
> ['', 'C/lib/python2.2/', 'C/lib/python2.2/plat-cygwin', 
> 'C/lib/python2.2/lib-tk'
> , '\\Python24/lib/python2.2/lib-dynload']
>  >>>
>  
> To keep the question simple, I've set PATH= in cygwin.bat to avoid 
> python initialze sys.path from Windows' PATH environment.
>  
> Obviously, 'C/lib/python2.2/' is a wrong path. In fact my python is 
> installed in /usr/local/lib/python2.2.3. The result of the issue is that 
> when you run a program python can't find the module. So what I really 
> want to know is where these path came from and how to fix it.
>  
>  
> 
Why "obviously"? 2.2.3 and 2.2.2 aren't meant to coexist, so one will
install over the other. So the directories you are seeing are what would
be used with standard prefix settings.

If you mean "obviously because I used a setting to configure the
prefixes for loading from a specific directory" then perhaps you are
suffering from having set your Windows PATH. If you *don't* set your
Windows PATH do you see it using the "2.2.3" variants?

Did you run "make install"?

Just a couple of random thoughts ... are you even sure that running the
"python" command does run your new 2.2.3 binary?

regards
 Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From gagsl-py at yahoo.com.ar  Sun Jan 28 20:46:39 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 28 Jan 2007 22:46:39 -0300
Subject: Problems with ElementTree and ProcessingInstruction
In-Reply-To: <1169994480.424321.51600@m58g2000cwm.googlegroups.com>
References: <1169994480.424321.51600@m58g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20070128224329.0470fa78@yahoo.com.ar>

At Sunday 28/1/2007 11:28, Kent  Tenney wrote:

>I want to generate the following file;
>
><?xml version="1.0" encoding="utf-8"?>
><?xml-stylesheet mystyle?>
><leo_file>stuff</leo_file>
>
>How should I be doing this?

open("filename","w").write('<?xml version="1.0" encoding="utf-8"?>\n'
         '<?xml-stylesheet mystyle?>\n'
         '<leo_file>stuff</leo_file>\n')

:)

>As far as I can tell, ElementTree() requires everything
>to be inside the root element (leo_file)

Just keep the first two lines on my example...


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From S.Mientki-nospam at mailbox.kun.nl  Sat Jan  6 05:29:58 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sat, 06 Jan 2007 11:29:58 +0100
Subject: howto overload with a NOP (empty statement)
Message-ID: <adeb4$459f7a11$d443bb3a$14652@news.speedlinq.nl>

How should I overload / disable a method ?
In the example below I have defined the class "Power_Supply", derived 
from baseclass "device".
The baseclass has a method "execute", which will be implemented in most 
derived classes, but not in all.
Now apparently it's not allowed to overload a method with an empty 
statement.
I could write a nonsense dummy statement, like "A= 3", but isn't there 
another way ?

thanks, Stef Mientki

class device:
   def execute (self):
     print 'execute not yet implemented for', self.Name


class Power_Supply (device):
   def execute (self): ;


From nszabolcs at gmail.com  Wed Jan 31 14:25:28 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 31 Jan 2007 11:25:28 -0800
Subject: Python **kwargs ?
In-Reply-To: <1170263432.199403.175290@k78g2000cwa.googlegroups.com>
References: <1170263432.199403.175290@k78g2000cwa.googlegroups.com>
Message-ID: <1170271526.715082.125370@s48g2000cws.googlegroups.com>


johnny wrote:
> What is **kwargs mean in python?  When you put double **, does it mean
> passing by reference?

here's a little example:

>>> def f(a, *args, **kw):
...     print 'a:',a
...     print 'args:',args
...     print 'kw:',kw
...
>>> f(1,2,3,x=4)
a: 1
args: (2, 3)
kw: {'x': 4}
>>> f(a=1,b=2,c=3)
a: 1
args: ()
kw: {'c': 3, 'b': 2}



From paul at boddie.org.uk  Mon Jan  1 16:53:55 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 1 Jan 2007 13:53:55 -0800
Subject: PEP 3107 Function Annotations for review and comment
References: <D6502383-5A30-4E1F-8B91-C2C4D23B3E13@PageDNA.com>
	<mailman.2139.1167437380.32031.python-list@python.org>
	<1167492896.292605.15040@48g2000cwx.googlegroups.com>
	<mailman.2160.1167505231.32031.python-list@python.org>
	<1167580455.349588.234610@v33g2000cwv.googlegroups.com>
	<mailman.2177.1167582211.32031.python-list@python.org>
Message-ID: <1167688435.399538.318990@48g2000cwx.googlegroups.com>

Tony Lownds wrote:
>
> It's possible packages like pylint will learn to interpret function annotations to provide
> better static analysis. Right?

It's true that for the area to be explored, which I know you've been
doing, one first has to introduce an annotation scheme that can then be
used by things like pylint. I'd like to see assertions about the
usefulness of such annotations verified by modified versions of tools
like pylint before changes to the language are made, mostly because
such assertions seem to be more conjecture than prediction. In other
words, the changes should be advocated, implemented and tested in a
closed system before being introduced as wider language changes,
especially given that Python has already seen a number of speculative
changes which were made in anticipation of certain needs that
subsequently appeared to be less significant than first thought.

Another thing I find worrying about function annotations is the
ambivalence around their purpose: the feature is supposedly great for
static typing, but when confronted over the consequences of having
developers spray type declarations everywhere, we're told that they
aren't really meant for such things and that type declarations are only
an example of what annotations could do. Here, the sales department and
the engineering department really have to get together and get their
story straight.

Paul



From srikrishnamohan at gmail.com  Fri Jan 12 09:40:46 2007
From: srikrishnamohan at gmail.com (km)
Date: Fri, 12 Jan 2007 20:10:46 +0530
Subject: setup.py ./configure arguments
Message-ID: <f4cc03640701120640x2f7dca40x6048f34bb5d2a2ae@mail.gmail.com>

Hi,

how do i pass '--enable-shared' etc arguments to Python2.5 setup.py ?
do i need to edit some file ?
regards,
KM
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070112/cae0e5b6/attachment.html>

From igouy at yahoo.com  Sat Jan 20 17:19:12 2007
From: igouy at yahoo.com (Isaac Gouy)
Date: 20 Jan 2007 14:19:12 -0800
Subject: Py 2.5 on Language Shootout
In-Reply-To: <mailman.2951.1169329048.32031.python-list@python.org>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>
	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>
	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>
	<1169275613.093797.67320@v45g2000cwv.googlegroups.com>
	<45B23400.2010906@gmx.de>
	<mailman.2944.1169309208.32031.python-list@python.org>
	<1169321686.025356.120340@s34g2000cwa.googlegroups.com>
	<mailman.2951.1169329048.32031.python-list@python.org>
Message-ID: <1169331552.918850.282920@a75g2000cwd.googlegroups.com>


Ramon Diaz-Uriarte wrote:
> On 20 Jan 2007 11:34:46 -0800, Isaac Gouy <igouy at yahoo.com> wrote:
> >
> > Ramon Diaz-Uriarte wrote:
> > > On 1/20/07, Carl Friedrich Bolz <cfbolz at gmx.de> wrote:
> > > > pgarrone at acay.com.au wrote:
> > > >  >>> Looking over the benchmarks, one gains the impression that Python is a
> > > >  >>> slow language.
> > > >  >> What does that even mean - a slow language?
> > > >  >>
> > > >  >
> > > >  > The alioth benchmarks provide a set of numbers by which
> > > >  > languages may be compared.
> > > >
> > > > Wrong. The benchmarks provide a set of numbers by which
> > > > _implementations_ of languages can be compared. After all, it is
> > > > possible that someone implements a magic-pixie-dust-interpreter that
> > > > executes Python programs several orders of magnitude fastes than
> > > > CPython. Or you could say that C is slow because if you use CINT, a C
> > > > interpreter ( http://root.cern.ch/root/Cint.html ) to execute it, it is
> > > > slow.
> > >
> > >
> > > Yeah, but this is hair-splitting. Except for Jython, IronPython, and
> > > Stackless, I think when we say "Python is slow/fast" we think CPython
> > > (otherwise, we qualify the implementation). For that matter it is
> > > often said "the GIL ..."; oh, but wait, Stackless ...
> >
> > When we say "Python is slow/fast" what does "slow/fast" mean?
> >
>
> Oh, well, I have no idea. I guess you'd have to define what "speed"
> and, if that is a single number, then we can just rank languages. We'd
> probably never agree on how to obtain a single number. But I think
> most of us, when looking at the shootout, can see that there are some
> languages that, for most of the programs, are consistently faster than
> the rest, and others that are consistently slower. But really, I think
> the shootout page has large, detailed and <b></b> statements about the
> perils and pitfalls of measuring these things. (And I do not go to the
> shootout to hear the oracle tell me which language I should use in my
> next project).

That's wise ;-)

Yes the shootout page has statements about the perils and pitfalls of
measuring these things - it's encouraging that at least one person has
noticed :-)


>
>
>
> >
> > >
> > > With other languages (e.g., Common Lisp) the separation between the
> > > language and the implementation is key because, to begin with, there
> > > is something external from, and independent of, any particular
> > > implementation. That is not the case with Python.
> > >
> > > And the example of CINT is hair-splitting to the nth power.To begin
> > > with, I do not think CINT implements the full standard C. But even if
> > > it were, when people think of C they rarely think of CINT.
> >
> > And that's why the existence of CINT is such a stark reminder of the
> > separation between the language and the implementation. When people
> > think of C what do they think of - gcc? tiny-c? intel c? microsoft c?
> > some mythical C implementation?
> >
> >
>
> Really, this ain't my war. Sure, there are two things: the language
> and the implementation. But, for practical purposes, when most people
> today say Python they mean CPython, whereas if the say Scheme, they
> certainly need to say _which_ Scheme (I think only PLT is in the
> official shootout page; there are others in the beta tests). If people
> want to mean Jython or Stackless, they just say that. As for C, I
> think people will need to qualify what exactly they mean.
>
> I think all these issues do not really lead to confusion for most of
> us; certainly not if you go to the shootout page. But as I said, this
> ain't my war. I was simply pointing out that correcting one poster for
> talking about languages when referring to python was hair splitting.
>
> And I think we are all running in circles, because I guess we all
> agree. This is turning into what in Spain (a country of catholic
> tradition) we call a discussion about "the sex of the angels" (el sexo
> de los angeles), i.e., whether angels are male or female or something
> else. Since sexing angels is not my area of expertise, I'll just shut
> up (I actually don't really know why I even said anything about this
> issue; please, forgive my chatiness).


In England the corresponding expression is "Counting Angels on a
Pinhead"
http://dannyayers.com/2001/misc/angels.htm

>
> Best,
>
> R.
>
>
> > >
> > > I think readers understood the previous poster.
> > >
> > > Best,
> > >
> > > R.
> > > >
> > > > Cheers,
> > > >
> > > > Carl Friedrich Bolz
> > > >
> > > > --
> > > > http://mail.python.org/mailman/listinfo/python-list
> > > >
> > >
> > >
> > > --
> > > Ramon Diaz-Uriarte
> > > Statistical Computing Team
> > > Structural Biology and Biocomputing Programme
> > > Spanish National Cancer Centre (CNIO)
> > > http://ligarto.org/rdiaz
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> --
> Ramon Diaz-Uriarte
> Statistical Computing Team
> Structural Biology and Biocomputing Programme
> Spanish National Cancer Centre (CNIO)
> http://ligarto.org/rdiaz



From half.italian at gmail.com  Tue Jan  2 15:16:58 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 2 Jan 2007 12:16:58 -0800
Subject: Remote askopenfilename()
Message-ID: <1167769018.742658.286380@s34g2000cwa.googlegroups.com>

Hi all.

I'm trying to get Tkinter.askopenfilename() to list a directory tree on
a remote computer.  I've got some ideas, but nothing is slapping me in
the face.  Can someone point me in the right direction?

~Sean



From bob at passcal.nmt.edu  Fri Jan 26 13:18:42 2007
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Fri, 26 Jan 2007 11:18:42 -0700
Subject: time series data and NumPy
References: <1169830757.220964.196540@m58g2000cwm.googlegroups.com>
	<51us3uF1mdcpsU1@mid.uni-berlin.de>
	<1169834042.396351.12660@h3g2000cwc.googlegroups.com>
Message-ID: <2007012611184275249-bob@passcalnmtedu>

On 2007-01-26 10:54:02 -0700, "BBands" <bbands at gmail.com> said:

> On Jan 26, 9:29 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> 
>> What you could do would be to convert the date-column into a timestamp,
>> which is a int/long, and use that. Would that help?
> 
> Actually that might help, as all I need the date for is to index
> values.
> 
> Thanks, I'll give it a spin.
> 
>      jab

You're using the Python-MySQL module mysqldb, right?  You can select 
the data from the database and have MySQL do the conversion with an SQL 
command.

select to_days(<your date column name here>), <your close column> from 
<your table>;

Bob




From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 19 06:36:29 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 19 Jan 2007 22:36:29 +1100
Subject: Iterator length
References: <1169162762.997894.180320@q2g2000cwa.googlegroups.com>
	<1169167258.553202.190130@m58g2000cwm.googlegroups.com>
	<1169168139.350836.79790@s34g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.19.11.36.29.99822@REMOVE.THIS.cybersource.com.au>

On Thu, 18 Jan 2007 16:55:39 -0800, bearophileHUGS wrote:

> What's your point? Maybe you mean that it consumes the given iterator?
> I am aware of that, it's written in the function docstring too. But
> sometimes you don't need the elements of a given iterator, you just
> need to know how many elements it has. A very simple example:
> 
> s = "aaabbbbbaabbbbbb"
> from itertools import groupby
> print [(h,leniter(g)) for h,g in groupby(s)]

s isn't an iterator. It's a sequence, a string, and an iterable, but not
an iterator.

I hope you know what sequences and strings are :-)

An iterable is anything that can be iterated over -- it includes sequences
and iterators.

An iterator, on the other hand, is something with the iterator protocol,
that is, it has a next() method and raises StopIteration when it's done.

>>> s = "aaabbbbbaabbbbbb"
>>> s.next()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'str' object has no attribute 'next'

An iterator should return itself if you pass it to iter():

>>> iter(s) is s
False
>>> it = iter(s); iter(it) is it
True

You've said that you understand len of an iterator will consume the
iterator, and that you don't think that matters. It might not matter in
a tiny percentage of cases, but it will certainly matter all the rest
of the time!

And let's not forget, in general you CAN'T calculate the length of an
iterator, not even in theory:

def randnums():
    while random.random != 0.123456789:
        yield "Not finished yet"
    yield "Finished"

What should the length of randnums() return?

One last thing which people forget... iterators can have a length, the
same as any other object, if they have a __len__ method:

>>> s = "aaabbbbbaabbbbbb"
>>> it = iter(s)
>>> len(it)
16

So, if you want the length of an arbitrary iterator, just call len()
and deal with the exception.



-- 
Steven.



From skip at pobox.com  Tue Jan 23 22:37:25 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 23 Jan 2007 21:37:25 -0600
Subject: easy_install pylons failure - www.myghty.org unavailable
Message-ID: <17846.54389.27457.383902@montanaro.dyndns.org>

I'm trying to easy_install pylons.  Alas:

    $ easy_install pylons
    Searching for pylons
    Best match: Pylons 0.9.4.1
    Processing Pylons-0.9.4.1-py2.5.egg
    Pylons 0.9.4.1 is already the active version in easy-install.pth

    Using /usr/local/mojam/lib/python2.5/site-packages/Pylons-0.9.4.1-py2.5.egg
    Processing dependencies for pylons
    Searching for Myghty>=1.1
    Reading http://cheeseshop.python.org/pypi/Myghty/
    Reading http://cheeseshop.python.org/pypi/Myghty/1.1
    Reading http://www.myghty.org
    error: Download error: (111, 'Connection refused')

Is it not able to get past this point because there is only one source for
Myghty or does it always need to go to a package's home page?  I was able to
work around this by manually downloading the Myghty-1.1.tar.gz file and
installing it.

Skip



From fredrik at pythonware.com  Thu Jan  4 01:40:47 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 04 Jan 2007 07:40:47 +0100
Subject: new office formats, REs and Python
In-Reply-To: <enhk26$gna$1@solaris.cc.vt.edu>
References: <enhk26$gna$1@solaris.cc.vt.edu>
Message-ID: <eni7hf$n53$1@sea.gmane.org>

tubby wrote:

> How are Python users dealing with some of the new OASIS Open Document 
> formats (Open Office) or MS Open XML formats. These formats store data 
> in a file which is actual a zip archive that contains numerous files and 
> folders. For example, a file saved from Open Office 2.0 named 'test.odt' 
> can be unzipped into many parts... content.xml, meta.xml, settings.xml, 
> etc, etc.
> 
> How can I read these files do re searching and matching on them, etc? 
> content.xml may have a string I'm searching for, but how would I attach 
> that back to the original 'test.odt' file?

http://ooopy.sourceforge.net/
http://www.google.com/search?q=python+open+office
etc

</F>



From gert.cuykens at gmail.com  Tue Jan 16 14:25:26 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Tue, 16 Jan 2007 20:25:26 +0100
Subject: for v in l:
In-Reply-To: <eoi35m$kql$00$1@news.t-online.com>
References: <mailman.2759.1168908488.32031.python-list@python.org>
	<eoi35m$kql$00$1@news.t-online.com>
Message-ID: <ef60af090701161125k5f4718cfqf4413250f0643ad@mail.gmail.com>

ok thx this was just what i was looking for

http://docs.python.org/tut/node7.html#SECTION007600000000000000000


From nogradi at gmail.com  Wed Jan 31 10:59:24 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Wed, 31 Jan 2007 16:59:24 +0100
Subject: "Correct" db adapter
In-Reply-To: <45c0b8cd$0$5072$ba4acef3@news.orange.fr>
References: <1170253666.826691.276800@s48g2000cws.googlegroups.com>
	<45c0b8cd$0$5072$ba4acef3@news.orange.fr>
Message-ID: <5f56302b0701310759i4e643c43u27f5aaf0fb21e0dc@mail.gmail.com>

> Maybe you should take a look at sqlalchemy
>
> > Hi to all,
> >
> > i have started a month ago to seriously studying Python. I am now
> > looking at the databases stuff
> > and i want the opinion of more experienced Python programmers (than
> > me) at the following :
> >
> > I see that there are a lot of databases adapters on the net, some
> > following the DB-API 2.0 and some others do not. I want to use a db-
> > module that do not tie me down to a specific database and that fully
> > supports DB-API 2.0
> > Now i am using Sql Server but who knows about tomorrow.
> >
> > I started using pyodbc and looking how i can e.x. call stored
> > procedure with arguments and all that stuff.
> > This is using ODBC syntac and i found enough info on the net.
> >
> > Is the approach i took the "correct" one or is there a better db-
> > module so i can use ?
> >
> > Thanks in advance
>

SQLObject might be of interest to you:
http://sqlobject.org/ it is a DB-API 2.0 compliant ORM.


From zaz600 at gmail.com  Mon Jan 29 09:53:40 2007
From: zaz600 at gmail.com (NoName)
Date: 29 Jan 2007 06:53:40 -0800
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <7xveiqapwi.fsf@ruckus.brouhaha.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<1170064302.264009.12650@p10g2000cwp.googlegroups.com>
	<7xveiqapwi.fsf@ruckus.brouhaha.com>
Message-ID: <1170082420.420688.109910@l53g2000cwa.googlegroups.com>

Hmmm..
In the Perl example password generates after user hit ENTER not 
continously like in Python you wrote... :)

i want see various ways to generate passwords even if they some 
indirect like using BASE64

thanks all


p.s. sorry for my eng ;)



From gnewsg at gmail.com  Wed Jan 17 07:09:33 2007
From: gnewsg at gmail.com (billie)
Date: 17 Jan 2007 04:09:33 -0800
Subject: Projects anyone?
In-Reply-To: <1168949268.618793.102890@l53g2000cwa.googlegroups.com>
References: <1168949268.618793.102890@l53g2000cwa.googlegroups.com>
Message-ID: <1169035773.692421.84610@38g2000cwa.googlegroups.com>

placid wrote:

> Hi all,
>
> I'm looking for anyone who is working on a project at the moment that
> needs help (volunteer). The last project i worked on personally was
> screen-scraping MySpace profiles (read more at the following link)
>
> http://placid.programming.projects.googlepages.com/screen-scrapingmyspaceprofiles
>
>
> but that didn't go all to well, so im kinda bored and need something to
> do, with Python. So any suggestions anyone?
>
> Cheers

Please, contact me at:

billiejoex __ at __ gmail.com

I could need help for 3 projects.



From ptmcg at austin.rr._bogus_.com  Sun Jan  7 17:43:32 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 7 Jan 2007 16:43:32 -0600
Subject: Additional pyparsing examples in latest release (1.4.5)
Message-ID: <45a17793$0$5197$4c368faf@roadrunner.com>

It seems I left out some examples from my announcement of pyparsing 1.4.5. 
Here is a more complete list of the new examples:

parsePythonValue.py - parses strings representing lists, dicts, and tuples, 
with nesting support; safe alternative to using eval
sql2dot.py - SQL diagram generator, parsed from schema table definitions 
(adapted from a post at 
http://energyblog.blogspot.com/2006/04/blog-post_20.html)
jsonParser.py - parses JSON object serializations into hierarchical 
ParseResults, accessible using list, dict, or object attribute methods
htmlStripper.py - strips HTML tags from HTML pages, leaving only body text

-- Paul




From irmen.NOSPAM at xs4all.nl  Sun Jan 28 13:17:56 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 28 Jan 2007 19:17:56 +0100
Subject: socket.inet_ntop, and pton question
In-Reply-To: <12rpns1tkp0e34@corp.supernews.com>
References: <12rpns1tkp0e34@corp.supernews.com>
Message-ID: <45bce8f7$0$334$e4fe514c@news.xs4all.nl>

Andrew wrote:
> Hi
> 
> Are these functions (inet_ntop(), inet_pton()) from the socket library 
> supported on Windows.
> 
> If not is there an equivalent for them using Windows
> 
> Ive seen mention of people creating their own in order to use them
> 
> Appreciate the help
> 
> ty

Why didn't you just try:

[E:\Projects]python
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> import socket
 >>> socket.inet_aton("127.0.0.1")
'\x7f\x00\x00\x01'
 >>> socket.inet_ntoa(_)
'127.0.0.1'
 >>>


This is on windows xp.

--Irmen



From stefan.behnel-n05pAM at web.de  Sat Jan  6 07:16:43 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sat, 06 Jan 2007 13:16:43 +0100
Subject: Using sax libxml2 html parser
In-Reply-To: <1167995370.789361.43410@v33g2000cwv.googlegroups.com>
References: <1167995370.789361.43410@v33g2000cwv.googlegroups.com>
Message-ID: <459f932c$0$30318$9b4e6d93@newsspool1.arcor-online.net>

cesar.ortiz at gmail.com wrote:
> I have created an example using libxml2 based in the code that appears
> in http://xmlsoft.org/python.html.
> My example processes an enough amount of html files to see that the
> memory consumption rises till the process ends (I check it with the
> 'top' command).


Try the lxml binding for libxml2. It relieves you from having to do your own
memory management and makes using that library plain easy.

http://codespeak.net/lxml/

Stefan


From Sardaukary at gmail.com  Tue Jan  9 17:19:34 2007
From: Sardaukary at gmail.com (Sard)
Date: 9 Jan 2007 14:19:34 -0800
Subject: What does the -O flag do?
Message-ID: <1168381174.638428.168500@k58g2000hse.googlegroups.com>

http://rgruet.free.fr/PQR25/PQR2.5.html says

"Optimize generated bytecode (also PYTHONOPTIMIZE=x). Asserts are
suppressed."

Is removing asserts all it does, where can I find more details?  I'm
guessing it's not very useful as I hardly ever see it mentioned.



From mhellwig at xs4all.nl  Sat Jan 27 11:33:44 2007
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Sat, 27 Jan 2007 17:33:44 +0100
Subject: Dictionary inserts and threads
Message-ID: <45bb7eac$0$321$e4fe514c@news.xs4all.nl>

Hi all,

I'm thinking to speed up a process, I like to use multiple threads to 
get data fractions from multiple servers and place those data fragments 
into a local dictionary for further processing, the dictionary will look 
like this:

self.dic = {'thread_a':dict(),
	    'thread_b':dict()}

The fragments will not overlap each other, since they will be 
subdictionaries within the dictionary, though it would be possible that 
multiple threads do something like this at the same time:

self.dic['thread_a'] = data_from_a()
and
self.dic['thread_b'] = data_from_b()

I assume that this is not a problem, but since assuming something gives 
a lot of room for screw-ups I rather ask beforehand if I should except 
all kinds of troubles when multiple threads update 'at the same time' a 
dictionary or that I should lock the dictionary, for each update?

Thanks for your insights.

-- 
mph



From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 27 23:36:43 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 28 Jan 2007 15:36:43 +1100
Subject: assertions to validate function parameters
References: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
	<1169909883.944892.74390@k78g2000cwa.googlegroups.com>
	<pan.2007.01.27.23.51.48.93774@REMOVE.THIS.cybersource.com.au>
	<1169954946.479629.312100@k78g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.28.04.36.43.157483@REMOVE.THIS.cybersource.com.au>

On Sat, 27 Jan 2007 19:29:06 -0800, Carl Banks wrote:

> On Jan 27, 6:51 pm, Steven D'Aprano 
> <s... at REMOVE.THIS.cybersource.com.au> wrote:
>> On Sat, 27 Jan 2007 06:58:04 -0800, Carl Banks wrote:
>> >> I find that when I detect invalid parameters overtly, I spend less time
>> >> debugging.
>>
>> > If it helps go ahead an use them.  The world won't end if you use an
>> > assertion in a less than ideal situation.  And, after all, if someone
>> > doesn't like it they can shut them off.
>>
>> Is there any way to have finer control of assertions than just passing -O
>> to the Python interpreter? Suppose I want to switch them off for certain
>> modules but not others, am I out of luck?
> 
> Please relax.  The suggestion that one could shut them off was tongue 
> in cheek.

(a) I am relaxed;

(b) One can shut down assertions, and it isn't a joke, it is a feature;

(c) I meant my question seriously, I think it would be a good thing.


-- 
Steven.



From Eric_Dexter at msn.com  Sun Jan 14 02:36:51 2007
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 13 Jan 2007 23:36:51 -0800
Subject: Tkinter code (with pmw) executing to soon please help
In-Reply-To: <45a9ad0a$1@nntp0.pdx.net>
References: <1168746063.322340.10410@l53g2000cwa.googlegroups.com>
	<mailman.2704.1168749021.32031.python-list@python.org>
	<45a9ad0a$1@nntp0.pdx.net>
Message-ID: <1168760210.636485.205020@a75g2000cwd.googlegroups.com>

C:\dex_tracker\csdlist.py bay-at-night.csd
Traceback (most recent call last):
 File "C:\dex_tracker\csdlist.py", line 58, in
root.mainloop()
 File "C:\Python25\lib\lib-tk\Tkinter.py", line 1023, in mainloop
self.tk.mainloop(n)
 File "../../..\Pmw\Pmw_1_2\lib\PmwBase.py", line 1751, in __call__
 File "../../..\Pmw\Pmw_1_2\lib\PmwBase.py", line 1777, in _reporterror
TypeError: unsupported operand type(s) for +: 'type' and 'str'
Script terminated.

It doesn't like the return handler part of it.

Scott David Daniels wrote:
> Gabriel Genellina wrote:
> >... So `callback` should return a function, like this:
> >
> > def callback(text):
> >   def handler(event):
> >     print text
> >
>
> Even better than that:
>      def callback(text):
>          def handler(event):
>              print text
>          return handler
>
> Otherwise callback returns the spectacularly un-useful value None.
> 
> --Scott David Daniels
> scott.daniels at acm.org



From bjourne at gmail.com  Wed Jan 31 05:38:01 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Wed, 31 Jan 2007 11:38:01 +0100
Subject: data design
In-Reply-To: <epop2g$b2d$1@zinnia.noc.ucla.edu>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
	<1170183985.871094.155720@q2g2000cwa.googlegroups.com>
	<45bfbcc3$0$30950$426a74cc@news.free.fr>
	<1170201274.580256.182740@v45g2000cwv.googlegroups.com>
	<epop2g$b2d$1@zinnia.noc.ucla.edu>
Message-ID: <740c3aec0701310238o4786273fuf3bce8c2f595c3e6@mail.gmail.com>

On 1/31/07, James Stroud <jstroud at mbi.ucla.edu> wrote:
> [copy_files]
> files_dir1 = this.file that.file
> path_dir1 = /some/path
>
> files_dir2 = the_other.file yet_another.file
> path_dir2 = /some/other/path
>
> In yaml, it might look thus.
>
> copy_files :
>       - files : [this.file, that.file]
>         path  : /some/path
>       - files : [the_other.file, yet_another.file]
>         path  : /some/other/path
>
> Both are readable (though I like equals signs in appearance over
> colons), but yaml doesn't require a lot of string processing to group
> the files with the paths. I don't even want to think the coding
> gymnastics required to split all of the option names and then group
> those with common suffixes.

But is not that a perfect world example? Consider:

[copy_files]
files_dir1=this.file that.file
path_dir1=/some/path
files_dir2=the_other.file yet_another.file
path_dir2=/some/other/path

versus:

copy_files:
-files:[this.file,that.file]
path:/some/path
-files:[the_other.file,yet_another.file]
path:/some/other/path

Mandatory indentation is good in programming languages, but does it
really belong in configuration files? With tabs verboten to boot.

-- 
mvh Bj?rn


From http  Fri Jan  5 18:37:32 2007
From: http (Paul Rubin)
Date: 05 Jan 2007 15:37:32 -0800
Subject: Encoding / decoding strings
References: <1167999295.242042.79470@s34g2000cwa.googlegroups.com>
	<1168010144.000928.131920@42g2000cwt.googlegroups.com>
	<pan.2007.01.05.15.34.29.883744@gmx.net>
	<1168018757.397170.216870@11g2000cwr.googlegroups.com>
Message-ID: <7xr6u92gg3.fsf@ruckus.brouhaha.com>

"oliver at obeattie.com" <oliver at obeattie.com> writes:
> Basically, what I am trying to do is display all comments by a
> specified user on the website. As the only thing which has =always=
> been used to identify users which never changes is their e-mail
> addresses, this is the only thing which I can use. Obviously, I can't
> display this e-mail address though.

Assign a unique number to each user in the system, and use the number.
Email addresses aren't necessarily stable since users should be able
to change their email addresses.

If you really want to use a hash, use the hmac module:

  import hmac
  hash = hmac.new('swordfish', 'person at domain.tld').hexdigest()

where instead of swordfish you'd use some random constant string that
you keep secret.  The secrecy stops attackers from figuring out
whether a given address has a specific hash per Mark Rintsch's
comment.  You'll still have to main a table mapping hashes back to
addresses, since the hashes are not reversable.

If you HAVE to have reversible encryption, you could use

   http://nightsong.com/phr/crypto/p3.py

note that the string you get is binary and is longer than the input
string even before you encode it to printing chars.  Note also that it
reveals the length of its input.

To generate a random string, use os.urandom:

   import os, binascii
   secret_string = binascii.hexlify(os.urandom(16))

you'd then embed the secret string in your program or database.  You
then face the problem of keeping it secret, which is not trivial.

Overall you're better off just assigning ID numbers to users like most
BBS's do.


From yinglcs at gmail.com  Mon Jan 22 16:45:40 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: 22 Jan 2007 13:45:40 -0800
Subject: How to convert a string into an integer
Message-ID: <1169502340.434227.224820@11g2000cwr.googlegroups.com>

Can you please tell me why the following code does not work in python?
My guess is I need to convert 'count' from a string to an integer. How
can I do that?
And my understanding is python is a dynamic type language, should
python convert it for me automatically?

count = sys.argv[2]
for i in range(count):
    #do some stuff

Thank you.



From tgrav at mac.com  Thu Jan 11 10:04:21 2007
From: tgrav at mac.com (Tommy Grav)
Date: Thu, 11 Jan 2007 10:04:21 -0500
Subject: Progress count in terminal (Mac OS X)
In-Reply-To: <eo5h6f$lsu$1@sea.gmane.org>
References: <9079A3B8-47A8-495A-BFAE-09A603CFB819@mac.com>
	<eo5h6f$lsu$1@sea.gmane.org>
Message-ID: <E56AA270-A680-401E-857F-AD900D6C39F4@mac.com>

This certainly does work when running the interpreter interactively,
but when inserted into a script it seems to buffer the print statement
and not write it out to the terminal. How can I force the print  
statement
to not buffer the output?

Cheers
    Tommy

On Jan 11, 2007, at 9:22 AM, Fredrik Lundh wrote:

> Tommy Grav <tgrav at mac.com>:
>
>> I have a program that does a lot of iterations and would like
>> to follow its progress by having it print out the current iteration
>> number as it progresses. How do I do this so that it appears
>> like a counter that increases in the same place in the terminal
>> window? I am using python2.5 on a Mac OSX and its terminal
>> tcsh window.
>
> print a carriage return before, and no line feed after, each line:
>
>     for i in range(100):
>         print "\r" + "count", i,
>     print # done
>
> </F>
>
>
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From dimitri.pater at gmail.com  Wed Jan 24 18:33:59 2007
From: dimitri.pater at gmail.com (dimitri pater)
Date: Thu, 25 Jan 2007 00:33:59 +0100
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <45b72b0d$0$5107$ba4acef3@news.orange.fr>
References: <ep60jp$63v$1@aioe.org> <45b72b0d$0$5107$ba4acef3@news.orange.fr>
Message-ID: <e75321bd0701241533ie528b15p42a0a75bd0666c2d@mail.gmail.com>

On 1/24/07, Laurent Rahuel <lrahuel.notgood at voila.fr> wrote:
>
> Hi,
>
> I known this can be impossible but what about an "HTML" GUI ?

Yep, I think you should consider a HTML GUI. I have just finished a project
using CherryPy running on localhost. The big advantage is that the app runs
on Linux, Mac and Win using a browser without any problem. You can use css
and js to polish the user interface and usability of your application.

regards,
Dimitri
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070125/3c4268f9/attachment.html>

From octabox at gmail.com  Tue Jan  9 09:58:50 2007
From: octabox at gmail.com (octabox at gmail.com)
Date: 9 Jan 2007 06:58:50 -0800
Subject: Internet Survey
Message-ID: <1168354730.421464.159680@51g2000cwl.googlegroups.com>

Hello all,

I represent Octabox, an Internet Start-up developing a wide-scale
platform for Internet services.  We are very interested to know your
thoughts on Internet productivity and how it might be improved, and to
that end we have set up a short survey at our website -
http://www.octabox.com/productivity_poll.php
We would very much appreciate if you would take a couple of minutes to
fill it up and influence our direction and empahsis.
 
Thanks in advance,
Octabox Development Team



From wolf_tracks at invalid.com  Wed Jan 24 16:07:51 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Wed, 24 Jan 2007 21:07:51 GMT
Subject: Python Windows Editors
In-Reply-To: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
Message-ID: <HUPth.66063$qO4.66057@newssvr13.news.prodigy.net>

W. Watson wrote:
> I downloaded python-2.5.msi and installed it. I believe its editor is 
> [corrected]IDLE. I understand there's a Win editor called pythonwin. I believe it's 
> in the download pywin32-210.win32-py2.5.exe, but I'm not sure if this 
> exe file has just the editor or all of Python. Comments? If not how do I 
> get the PythonWin editor by itself?
> 
> BTW, one of the features I did not like of IDE is the limited file Print 
> command. It puts everything in 16pt type, and gives no choice over what 
> pages should be printed. Maybe there's an option?
I don't see any responses that address regarding 
pywin32-210.win32-py2.5.exe, so it looks like I'll have to undbundle it and 
see for myself.


From tjreedy at udel.edu  Mon Jan 22 22:32:35 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 22 Jan 2007 22:32:35 -0500
Subject: arrow keys don't work
References: <1169506381.452422.179070@11g2000cwr.googlegroups.com><pan.2007.01.23.00.14.29.144841@REMOVEME.cybersource.com.au>
	<1169511711.594390.167630@11g2000cwr.googlegroups.com>
Message-ID: <ep3vkf$558$1@sea.gmane.org>


"tac-tics" <tactics40 at gmail.com> wrote in message 
news:1169511711.594390.167630 at 11g2000cwr.googlegroups.com...
|> Have you changed your terminal (either the program itself or its config)
| udlr yields ^[[A^[[B^[[C^[[D in the interactive python interpreter, but
| like I said, works like it should outside the Python interpreter.

If I remember correctly, '^[' represents the escape character and '^[[A', 
etc  represent the standard ANSI terminal escape sequences for the up, etc, 
key.  So you are missing the interpretive layer that should intercept and 
act on those sequences and Python is getting them raw (literally).

tjr





From gert.cuykens at gmail.com  Tue Jan 23 16:11:42 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Tue, 23 Jan 2007 22:11:42 +0100
Subject: instancemethod
In-Reply-To: <dea92f560701230608p469d5937ya658e2bb234c4941@mail.gmail.com>
References: <mailman.2961.1169417800.32031.python-list@python.org>
	<45b51298$0$8289$426a74cc@news.free.fr>
	<ef60af090701221255m575701e7jaae6bd858acbea5c@mail.gmail.com>
	<dea92f560701230608p469d5937ya658e2bb234c4941@mail.gmail.com>
Message-ID: <ef60af090701231311j76c8aeeyc5c8f416c0b15af2@mail.gmail.com>

import MySQLdb

class Db(object):

    def __enter__(self):
        pass

    def __init__(self,server,user,password,database):
        self._db=MySQLdb.connect(server , user , password , database)
        self._db.autocommit(True)
        self.cursor=self._db.cursor()

    def execute(self,cmd):
        self.cursor.execute(cmd)
        self.rowcount=int(self.cursor.rowcount)

    def close(self):
        self.cursor.close()
        self._db.close()

    def __getattr__(self, name):
        attr = getattr(self._cursor, name,getattr(self._db, name,  None))
        if attr is None:
            raise AttributeError("object %s has no attribute %s"
%(self.__class__.__name__, name))
        return attr

    def __del__(self):
        try:
            self.close()
        finally:
            pass
        except:
            pass

    def __exit__(self):
        pass

if __name__ == '__main__':
    gert = Db('localhost','root','*****','gert')
    gert.execute('select * from person')
    for row in gert.cursor:
        print row

    with Db('localhost','root','*****','gert') as gert:
        gert.excecute('select * from person')
        for row in gert.cursor:
            print row

Desktop/svn/db/Py/db.py:45: Warning: 'with' will become a reserved
keyword in Python 2.6
  File "Desktop/svn/db/Py/db.py", line 45
    with Db('localhost','root','*****','gert') as gert:
          ^
SyntaxError: invalid syntax

I was thinking if it would be possible to create a object that uses
it's own instance name as a atribute.

For example instead of
gert = Db('localhost','root','*****','gert')

you would do this
gert = Db('localhost','root','*****')

and the name of the object itself 'gert' get's assigned to database somehow ?


From bignose+hates-spam at benfinney.id.au  Sat Jan 20 02:10:04 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 20 Jan 2007 18:10:04 +1100
Subject: Code reformater?
References: <poe3r2ha92p6vrhtk9b2piso337djv4boo@4ax.com>
Message-ID: <874pqm41ir.fsf@benfinney.id.au>

Vincent Delporte <justask at acme.com> writes:

> When I copy/paste Python code from the web, every so often, the TABs
> are wrong, which means that the code won't work and I have to
> manually reformat the code.
>
> Is there a code reformater that can parse the code to make it right?

Indentation is necessary for the syntax in Python. If that information
is lost, it can't be reliably recreated.

-- 
 \       "People come up to me and say, 'Emo, do people really come up |
  `\                                         to you?'"  -- Emo Philips |
_o__)                                                                  |
Ben Finney



From bignose+hates-spam at benfinney.id.au  Wed Jan 31 19:24:09 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 01 Feb 2007 11:24:09 +1100
Subject: How to sort using hash's key?
References: <mailman.3375.1170284622.32031.python-list@python.org>
	<wt-dnXMFALATslzYnZ2dnUVZ_qXinZ2d@comcast.com>
Message-ID: <87zm7yu3me.fsf@benfinney.id.au>

Steven Bethard <steven.bethard at gmail.com> writes:

> JoJo wrote:
> > I want to sort a dict via its key,but I have no idea on how to do
> > it.
>
> >>> d = dict(a=2, b=1)
> >>> for key in sorted(d):
> ...     print key, d[key]
> ...
> a 2
> b 1

That's not a solution to "sort the dict"; that's getting a particular
representation of the dict. It's likely the original poster wants the
equivalent to list.sort() instead of a one-time output of the
contents.

-- 
 \        "I installed a skylight in my apartment. The people who live |
  `\                          above me are furious!"  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From wpeloqui at gmail.com  Thu Jan 18 19:37:14 2007
From: wpeloqui at gmail.com (Willie)
Date: 18 Jan 2007 16:37:14 -0800
Subject: Using lambda with a Pmw.ComboBox
Message-ID: <1169167034.200565.227900@a75g2000cwd.googlegroups.com>

Hi,

I have an array of 2 ComboBoxes. I would like to use lambda to report
on which widget is being accessed. When I use arrays of other widgets I
just use lambda to return which item I am using as an argument. This
does not seem to work with ComboBox, the only thing returned is the
value changed.

Can someone refer me to some code which shows this in action? I have
searched the web for a solution, without any luck.

Thanks,

Willie



From danielkleinad at gmail.com  Thu Jan 11 14:02:04 2007
From: danielkleinad at gmail.com (Daniel Klein)
Date: Thu, 11 Jan 2007 19:02:04 GMT
Subject: Learning Python book, new edition?
References: <mailman.2580.1168528978.32031.python-list@python.org>
	<50n9daF1g30l4U1@mid.individual.net>
Message-ID: <ha2dq2d15g3ndb170l31aam2253cbf4472@4ax.com>

On Thu, 11 Jan 2007 18:11:06 +0100, Bjoern Schliessmann
<usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:

>Demel, Jeff wrote:
>
>> Does anyone know if there's a plan in the works for a new edition
>> of Learning Python?  The current edition (2nd) is a few years old
>> and looks like it only covers Python 2.3.
>
>IIRC, differences to 2.4 are in it, too.
>

The only thing I see missing from it, from a 'learning' point of view,
is the new try/catch/finally construct.

Dan


From ptmcg at austin.rr._bogus_.com  Tue Jan  9 07:05:33 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 9 Jan 2007 06:05:33 -0600
Subject: line duplication using logging to file
References: <1168329975.491514.282000@11g2000cwr.googlegroups.com>
Message-ID: <45a3850d$0$16962$4c368faf@roadrunner.com>

"seb" <sebastien.thur at laposte.net> wrote in message 
news:1168329975.491514.282000 at 11g2000cwr.googlegroups.com...
> Hi, I am writing to a file some basic information using the logging
> module.  It is working but in the log file some line are printed
> several time. I had put some print debugging messages in the logging
> function (so they appear on the consile) and they are called once only.
> Obviously there is some understantding of the logging module that I am
> missing.
>
> My simple logging program (see below) is called by several processes.
> In this way I can collect the information from various sources (and not
> use the network enabled logging module)
>
> I am using python 2.4 on WinXP SP2.
>
> Do you have any idea ? Thanks in advance.
>
> Seb.
>

A quick tally of log messages by timestamp and comment gives this data:

('2007-01-08 18:26:19,578', '___init_rs232initrs232_openCOM1') : 1
('2007-01-08 18:26:19,578', '___run____thread lance') : 2
('2007-01-08 18:26:32,015', '___test1TEST 1 = OK') : 3
('2007-01-08 18:26:42,483', '___test1TEST 1 = OK') : 4
('2007-01-08 18:26:53,750', '___test1TEST 1 = OK') : 5
('2007-01-08 18:27:03,092', '___test1TEST 1 = OK') : 6
('2007-01-08 18:27:13,671', '___test1TEST 1 = OK') : 7
('2007-01-08 18:27:14,796', '___run___fin dans le run car continue = 0') : 8
('2007-01-08 18:27:14,890', "___stopthread demande d'arret") : 9
('2007-01-09 08:51:26,562', '___init_rs232initrs232_openCOM1') : 1
('2007-01-09 08:51:26,733', '___run____thread lance') : 2
('2007-01-09 08:51:39,453', '___test1TEST 1 = OK') : 3
('2007-01-09 08:51:48,280', '___test1TEST 1 = OK') : 4
('2007-01-09 08:51:58,750', '___test1TEST 1 = OK') : 5
('2007-01-09 08:52:09,812', '___test1TEST 1 = OK') : 6
('2007-01-09 08:52:19,078', '___test1TEST 1 = OK') : 7
('2007-01-09 08:52:22,078', '___run___fin dans le run car continue = 0') : 8
('2007-01-09 08:52:22,125', "___stopthread demande d'arret") : 8
('2007-01-09 08:52:22,125', "___stopthread demande d'arret ") : 1

Does this suggest anything to you?

-- Paul


(BTW, here is the pyparsing program I used to do this analysis)

from pyparsing import 
Word,nums,Combine,alphas,oneOf,Literal,SkipTo,restOfLine

# create pyparsing grammar definition for a log line
date = Word(nums,exact=4)+'-'+Word(nums,exact=2)+'-'+Word(nums,exact=2)
time = Word(nums,exact=2)+':'+Word(nums,exact=2)+':'+Word(nums,exact=2)+ \
        ','+Word(nums,exact=3)
timestamp = Combine(date + ' ' + time)
severity = oneOf( ["INFO","WARNING"] ) # not complete, but enough for this 
data
backslash = Literal("\\")
fileref = Combine(Word(alphas,exact=1)+":" + backslash + SkipTo(".py") + 
".py")
logline = ( timestamp.setResultsName("timestamp") + "-" +
            severity.setResultsName("severity") + "-" +
            fileref.setResultsName("fileref") +
            restOfLine.setResultsName("comment") )

# create list of ParseResults, with addressable log line elements by results 
name
logEntries = [ logline.parseString(line) for line in logdata ]

# tally up log lines by timestamp and comment
tallyByTimestamp = {}
for entry in logEntries:
    tallyKey = (entry.timestamp, entry.comment)
    tallyByTimestamp[tallyKey] = tallyByTimestamp.get(tallyKey,0) + 1

for ts in sorted( tallyByTimestamp.items() ):
    print "%s : %d" % ts




From Ognjen at mailshack.com  Thu Jan  4 11:04:07 2007
From: Ognjen at mailshack.com (Ognjen Bezanov)
Date: Thu, 04 Jan 2007 16:04:07 +0000
Subject: Using External Libraries with python?
Message-ID: <459D2577.70503@mailshack.com>

Hello,

I have some external C libraries I would like to use with python.

I have been searching on the internet and found many such
modules/bindings for libraries (e.g. Py-Lame) but have not yet
come across any information of how to actually go about creating such
bindings, so I was wondering if anybody here could point me in the right
direction?

Thank you!



From john.d.clark at mac.com  Wed Jan  3 07:05:35 2007
From: john.d.clark at mac.com (John Clark)
Date: Wed, 3 Jan 2007 07:05:35 -0500
Subject: NYC Python User Group Meeting
Message-ID: <01f701c72f2f$7adb9dd0$b301a8c0@haengma>

Greetings!

The next New York City Python Users Group meeting is this Tuesday, Jan. 9th,
6:30pm at at the Millennium Partners office at 666 Fifth Avenue (53rd St.
and 5th Ave.) on the 8th Floor. We welcome all those in the NYC area who are
interested in Python to attend. However, we need a list of first and last
names to give to building security to make sure you can gain access to the
building. RSVP to clajo04 at mac.com to add your name to the list. 

More information can be found on the yahoo group page:

http://tech.groups.yahoo.com/group/nycpython/

Hope to see you there!

-John




From jura.grozni at gmail.com  Tue Jan 16 11:07:09 2007
From: jura.grozni at gmail.com (azrael)
Date: 16 Jan 2007 08:07:09 -0800
Subject: help needed for pymorph
Message-ID: <1168963625.800116.231490@a75g2000cwd.googlegroups.com>

Hi guys

I tried to install and run pymorph but I am having some problems.
when I want to use mmshow() I get the message

     ImportError: DLL load failed: the specified module could not be
found

import morph
import handson

def main ():
    arr = mmreadgray("beef.jpg");
    mmgshow(arr)

does anyone have any idea how to fix it.


thnx



From exarkun at divmod.com  Sat Jan  6 17:15:20 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sat, 6 Jan 2007 17:15:20 -0500
Subject: search mail by date with imaplib
In-Reply-To: <1168112957.946721@sj-nntpcache-1.cisco.com>
Message-ID: <20070106221520.11447.869207529.divmod.quotient.8153@ohm>

On Sat, 06 Jan 2007 11:49:17 -0800, rweth <rweth at cisco.com> wrote:
>csselo at gmail.com wrote:
>> Hi
>> I am looking for a code sample which searches mail by date with imaplib
>>
>> example:
>> get email from 01.01.2007 to now
>>
>> how can I change imaplib search parameters?
>>
>So I had to do the same thing a few years back. I love python but
>seriously every author spends less than 1/10 of 1% on doc !
>
>Well So do I .. so take it with a grain of salt. Here is what I did,
>MANY YEARS AGO .. I don't even have a IMAP account anymore
>
>t,data = M.uid("SEARCH",None,'(FROM blahblah)')
>luid = string.split(data[0])
>for uid in luid:
>   t,d = M.uid("FETCH",uid,"(BODY[HEADER.FIELDS (DATE SUBJECT TO)])")
>   date = d[0][1]
>
>This will get you the dates .. and you can write your own
>filter off that .. it's trivial. What isn't so great is
>getting every piece of mail and then searching for the needle's in
>the haystack.
>
>So I guess this is plan c (just in case you don't get a better answer).
>I will watch this one for a "plan a | b" answer.
>

The SEARCH command supports quite a few kinds of criteria.  Several which
may be relevant here are BEFORE, SINCE, SENTBEFORE, and SENTSINCE.  Using
Twisted's IMAP4 code, you can format a query like this:

    >>> from twisted.mail.imap4 import Query
    >>> Query(after='01-Jan-2007')
    '(AFTER "01-Jan-2007")'
    >>>

Since documentation was brought up, I'll point out Query's docs too, since
that might help shed some further light on what's possible.

http://twistedmatrix.com/documents/current/api/twisted.mail.imap4.html#twisted.mail.imap4.Query

Jean-Paul


From __peter__ at web.de  Mon Jan 29 03:06:49 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 29 Jan 2007 09:06:49 +0100
Subject: import from future
References: <1169969100.946843.111770@p10g2000cwp.googlegroups.com>
	<1170049392.204148.54430@a34g2000cwb.googlegroups.com>
	<pan.2007.01.29.06.55.17.36996@gmx.net>
Message-ID: <epk9tr$aev$01$1@news.t-online.com>

Marc 'BlackJack' Rintsch wrote:

> In <1170049392.204148.54430 at a34g2000cwb.googlegroups.com>, Dan Bishop
> wrote:
> 
>> Now that nested_scopes and generators are no longer optional, the only
>> thing left is "from __future__ import division", which makes the "/"
>> operator on integers give the same result as for floats.
> 
> From 2.5 on we have `with_statement`::

...and absolute_import.

Peter




From Eric_Dexter at msn.com  Sun Jan 21 18:08:33 2007
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 21 Jan 2007 15:08:33 -0800
Subject: Reading Fortran Data
In-Reply-To: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
References: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
Message-ID: <1169420913.789301.227430@11g2000cwr.googlegroups.com>

I don't know if this is helpfull or not but (or for that matter
current).  http://cens.ioc.ee/projects/f2py2e/ offers some suggestions
and it looks like you can use it with c code also.


Tyler wrote:
> Hello All:
>
> After trying to find an open source alternative to Matlab (or IDL), I
> am currently getting acquainted with Python and, in particular SciPy,
> NumPy, and Matplotlib. While I await the delivery of Travis Oliphant's
> NumPy manual, I have a quick question (hopefully) regarding how to read
> in Fortran written data.
>
> The data files are not binary, but ASCII text files with no formatting
> and mixed data types (strings, integers, floats). For example, I have
> the following write statements in my Fortran code:
>
> I write the files as such:
>   WRITE(90,'(A30)') fgeo_name
>   WRITE(90,'(A30)') fmed_name
>   WRITE(90,*) nfault,npoint
>   WRITE(90,*) (xpt(n), n=1,npoint)
>   WRITE(90,*) (ypt(n), n=1,npoint)
>
> and,
>
>   WRITE(10,'(A30)') fname
>   DO i=1,nfault
>      WRITE(10,*) dbn(i),dtn(i),xfwnt(i),yfwnt(i),xfent(i),yfent(i),&
>           &        slpvlS(i),slpvlD(i),slpvlT(i),segdp1(i)
>   END DO
>
>
> I then respectively read them into Fortran as:
>   READ(70,'(A30)') fgeo_name
>   READ(70,'(A30)') fmed_name
>   READ(70,*) nfault,npoint
>   READ(70,*) (x(n), n=1,npoint)
>   READ(70,*) (y(n), n=1,npoint)
>
> and,
>
>   READ(20,'(A30)') fname
>   DO i=1,nfault
>      READ(20,*) dbn(i),dtn(i),xfwnt(i),yfwnt(i),xfent(i),yfent(i),&
>           &        slpvlS(i),slpvlD(i),slpvlT(i),segdp1(i)
>   END DO
>
> I also read them into IDL for visualization using the "READF" command.
> I was wondering how I might go about reading this into Python using
> NumPy. If this is not trivial, let me know and I'll just wait until the
> NumPy manual arrives.
> 
> Cheers,
> 
> t.



From michael at mustun.ch  Wed Jan  3 10:17:45 2007
From: michael at mustun.ch (mm)
Date: Wed, 03 Jan 2007 16:17:45 +0100
Subject: code optimization (calc PI)
Message-ID: <hOPmh.82$9v1.124@nntpserver.swip.net>

(Yes, I konw whats an object is...)
BTW. I did a translation of a pi callculation programm in C to Python. 
(Do it by your own... ;-)
--------
Calc PI for 800 digs(?). (german: Stellen)
------
int a=10000,b,c=2800,d,e,f[2801],g;main(){for(;b-c;)f[b++]=a/5;
     for(;d=0,g=c*2;c-=14,printf("%.4d",e+d/a),e=d%a)for(b=c;d+=f[b]*a,
     f[b]=d%--g,d/=g--,--b;d*=b);}

$ ./a.exe
31415926535897932384626433832795028841971693993751058209749445923078164062862089
98628034825342117067982148086513282306647093844609550582231725359408128481117450
28410270193852110555964462294895493038196442881097566593344612847564823378678316
52712019091456485669234603486104543266482133936072602491412737245870066063155881
74881520920962829254091715364367892590360011330530548820466521384146951941511609
43305727036575959195309218611738193261179310511854807446237996274956735188575272
48912279381830119491298336733624406566430860213949463952247371907021798609437027
70539217176293176752384674818467669405132000568127145263560827785771342757789609
17363717872146844090122495343014654958537105079227968925892354201995611212902196
08640344181598136297747713099605187072113499999983729780499510597317328160963185
--------

But Python is much slower here then C here. I used a while-loop within a 
while-loop. Not that much calculation here.


From Thomas.Ploch at gmx.net  Sun Jan  7 12:09:33 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sun, 07 Jan 2007 18:09:33 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <1168188427.144219.206490@s80g2000cwa.googlegroups.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
Message-ID: <45A1294D.7050103@gmx.net>

sturlamolden schrieb:
> time.swift at gmail.com wrote:
>> Coming from a C++ / C# background, the lack of emphasis on private data
>> seems weird to me. I've often found wrapping private data useful to
>> prevent bugs and enforce error checking..
>>
>> It appears to me (perhaps wrongly) that Python prefers to leave class
>> data public.  What is the logic behind that choice?
> 
> The designers of Java, C++, C#, Ada95, Delphi, etc. seem to think that
> if an object's 'internal' variables or states cannot be kept private,
> programmers get an irresistible temptation to mess with them in
> malicious ways. But if you are that stupid, should you be programming
> in any language? The most widely used language is still C, and there is
> no concept of private data in C either, nor is it needed.

There is a kind of this concept in C with 'static' declarations.

> As mentioned in other replies, it is not rocket science to access a
> class private data. In C++ you can cast to void*, in Java and C# you
> can use reflection. C++ is said to be an "unsafe" language because
> programmers can, using a few tricks, mess with the vtables. But how
> many really do that?

Exactly, if they were available, a lot more would do that. I think this
is the point. Programmers who can do that normally are sensible towards
that people who have designed this or that knew what they were doing.
But there are enough people that don't have a clue and _will_ fiddle
around and then flame all kind of mailing lists with requests for help
cause they did it wrong.






From arkanes at gmail.com  Tue Jan 30 11:25:57 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 30 Jan 2007 10:25:57 -0600
Subject: message handling in Python / wxPython
In-Reply-To: <5fe216230701300113i4422bae8g97021e07361bfc2b@mail.gmail.com>
References: <5fe216230701300113i4422bae8g97021e07361bfc2b@mail.gmail.com>
Message-ID: <4866bea60701300825h6ae3d0aejcdb7228bd3f362a3@mail.gmail.com>

On 1/30/07, murali iyengar <muralims80 at gmail.com> wrote:
> hi,
> i have basic knowledge of python and wxPython... now i need to know about
> message handling in python/wxPython?
>
> could anybody pls help me by giving some info on how to handle (in Python),
> 'the user defined messages' posted from VC++, i dont know how to handle
> messaes in python.
>
> Thanks and Regards,
> Murali M.S
> --

You need to override the WndProc at the C level in order to catch
these. As it happens, there is a page on the wxPyWiki about this exact
topic:


http://wiki.wxpython.org/index.cgi/HookingTheWndProc


From paul.sijben at xs4all.nl  Wed Jan 10 06:42:01 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Wed, 10 Jan 2007 12:42:01 +0100
Subject: maximum number of threads
In-Reply-To: <mailman.2527.1168427522.32031.python-list@python.org>
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl>	<7.0.1.0.0.20070110064655.0508d0a0@yahoo.com.ar>
	<mailman.2527.1168427522.32031.python-list@python.org>
Message-ID: <45A4D109.809@xs4all.nl>

Felipe Almeida Lessa wrote:

> Maybe Stackless could help the OP?
> http://www.stackless.com/
> 

thanks I will look into it!


From python at hope.cz  Fri Jan 12 05:06:41 2007
From: python at hope.cz (Lad)
Date: 12 Jan 2007 02:06:41 -0800
Subject: How to run external program?
In-Reply-To: <mailman.2637.1168595038.32031.python-list@python.org>
References: <1168594577.397453.320380@a75g2000cwd.googlegroups.com>
	<mailman.2637.1168595038.32031.python-list@python.org>
Message-ID: <1168596401.191648.79440@38g2000cwa.googlegroups.com>


Gary Herron wrote:
> Lad wrote:
> > How  can I run external program from Python?
> > I use Python with XP
> > Thank you for help
> > LB
> >
> >
> The subprocess module is what you want for this.
>
> It's got ways of running external executables as separate subprocesses,
> and interacting with the subprocess and both its input and output.
>
 Gary ,
Thank you for your reply.
I use os.popen3 but it does not work properly for me all the time.

Here is a part of my Python  program
I use an external  program ( here mpeg.exe) for converting sourcefile
into targetfile
###########...
...
...
mpeg = "mpeg.exe -i %s codec mp3  -s 320x240 %s" % (sourcefile,
targetfile)
stdin, stdout, stderr = os.popen3(mpeg)
mpegresult = stdout.read()
mpegerrors = stderr.read()
stdin.close(); stdout.close(); stderr.close()
print ffmpegerrors
print ffmpegresult
#########

It works  if the sourcefile is small but if it is large( 30MB) it does
NOT work.It hangs or the file is not converted in full.
Any advice how I should change the program?
Thank you.
L.



From gheissenberger at gmail.com  Thu Jan 11 16:27:39 2007
From: gheissenberger at gmail.com (gheissenberger at gmail.com)
Date: 11 Jan 2007 13:27:39 -0800
Subject: Python nuube needs Unicode help
Message-ID: <1168550858.233814.292900@p59g2000hsd.googlegroups.com>

HELP!
Guy who was here before me wrote a script to parse files in Python.

Includes line:
print u
where u is a line from a file we are parsing.
However, we have started recieving data from Brazil. If I open file to
parse in VI, looks like:

<Utt id="3" transcribe="yes" audioRoot="A1"
audio="313-20070102144528.wav" grammarSet="G3" rawText="n&#227;o"
recValue="{data:CHOICE=NO;}" conf="970" rawText2="" conf2="0"
transcribedText="n&#227;o" parsableText="n&#227;o"/

Clearly those "n&#227" are some non-Ascii characters, but how do I get
print to understand that?

I keep getting:
"UnicodeEncodeError: 'ascii' codec can't encode character u'\xe3' in
position 40:
 ordinal not in range(128)"



From arkanes at gmail.com  Wed Jan 24 13:36:46 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 24 Jan 2007 12:36:46 -0600
Subject: The reliability of python threads
In-Reply-To: <ep883i$iom$1@gemini.csx.cam.ac.uk>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
Message-ID: <4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>

On 24 Jan 2007 18:21:38 GMT, Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
>
> In article <mailman.3095.1169659417.32031.python-list at python.org>,
> "Chris Mellon" <arkanes at gmail.com> writes:
> |> > |>
> |> > |> Does anyone have any conclusive evidence that python threads/locks are
> |> > |> safe or unsafe?
> |> >
> |> > Unsafe.  They are built on top of unsafe primitives (POSIX, Microsoft
> |> > etc.)  Python will shield you from some problems, but not all.
> |> >
> |> > There is precious little that you can do, because the root cause is
> |> > that the standards and specifications are hopelessly flawed.
> |>
> |> This is sufficiently inaccurate that I would call it FUD. Using
> |> threads from Python, as from any other language, requires knowledge of
> |> the tradeoffs and limitations of threading, but claiming that their
> |> usage is *inherently* unsafe isn't true. It is almost certain that
> |> your code and locking are flawed, not that the threads underneath you
> |> are buggy.
>
> I suggest that you find out rather more about the ill-definition of
> POSIX threading memory model, to name one of the better documented
> aspects.  A Web search should provide you with more information on
> the ghastly mess than any sane person wants to know.
>
> And that is only one of many aspects :-(
>

I'm aware of the issues with the POSIX threading model. I still stand
by my statement - bringing up the problems with the provability of
correctness in the POSIX model amounts to FUD in a discussion of
actual problems with actual code.

Logic and programming errors in user code are far more likely to be
the cause of random errors in a threaded program than theoretical
(I've never come across a case in practice) issues with the POSIX
standard.

Emphasizing this means that people will tend to ignore bugs as being
"the fault of POSIX" rather than either auditing their code more
carefully, or avoiding threads entirely (the second being what I
suspect your goal is).

As a last case, I should point out that while the POSIX memory model
can't be proven safe, concrete implementations do not necessarily
suffer from this problem.


From sjdevnull at yahoo.com  Tue Jan  9 05:55:07 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 9 Jan 2007 02:55:07 -0800
Subject: General Question About Python
In-Reply-To: <1168254451.098796.144790@42g2000cwt.googlegroups.com>
References: <1168254451.098796.144790@42g2000cwt.googlegroups.com>
Message-ID: <1168340107.053008.67530@s34g2000cwa.googlegroups.com>

Enteng wrote:
> To those who program in python, what programs do you do?

Some Unix TCP servers, some data-driven command line apps, and some web
stuff.

> Also what community projects are you involved in(OSS probably)?

None that are Python-based, aside from the occasional patch to support
new Python features in Vim or keep it working with newer versions.

> Will mastering the language land me a job?

Maybe.  My last 3 jobs have been for people with experience in C and
Python, or with substantial programming experience and a willingness to
learn C and Python.



From __peter__ at web.de  Sun Jan 14 09:33:58 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 14 Jan 2007 15:33:58 +0100
Subject: Tkinter code (with pmw) executing to soon please help
References: <1168746063.322340.10410@l53g2000cwa.googlegroups.com>
	<mailman.2704.1168749021.32031.python-list@python.org>
	<45a9ad0a$1@nntp0.pdx.net>
	<1168760210.636485.205020@a75g2000cwd.googlegroups.com>
Message-ID: <eodf0b$avm$00$1@news.t-online.com>

Eric_Dexter at msn.com wrote:

> Scott David Daniels wrote:
>> Gabriel Genellina wrote:
>> >... So `callback` should return a function, like this:
>> >
>> > def callback(text):
>> >   def handler(event):
>> >     print text
>> >
>>
>> Even better than that:
>>      def callback(text):
>>          def handler(event):
>>              print text
>>          return handler
>>
>> Otherwise callback returns the spectacularly un-useful value None.

> C:\dex_tracker\csdlist.py bay-at-night.csd
> Traceback (most recent call last):
>  File "C:\dex_tracker\csdlist.py", line 58, in
> root.mainloop()
>  File "C:\Python25\lib\lib-tk\Tkinter.py", line 1023, in mainloop
> self.tk.mainloop(n)
>  File "../../..\Pmw\Pmw_1_2\lib\PmwBase.py", line 1751, in __call__
>  File "../../..\Pmw\Pmw_1_2\lib\PmwBase.py", line 1777, in _reporterror
> TypeError: unsupported operand type(s) for +: 'type' and 'str'
> Script terminated.
> 
> It doesn't like the return handler part of it.

Probably because a Tkinter.Button command callback doesn't accept any
arguments. Try

def callback(text):
    def handler():
        print text
    return handler

Note that 'make_callback' would be a better name than 'callback' because the
function 'callback' actually creates the callback (called 'handler').

Peter




From steven.bethard at gmail.com  Thu Jan  4 13:13:23 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 04 Jan 2007 11:13:23 -0700
Subject: When argparse will be in the python standard installation
In-Reply-To: <459CBAC8.9060007@v.loewis.de>
References: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>
	<459C008D.5040404@v.loewis.de>
	<H-ydneqpW-axgAHYnZ2dnUVZ_qWvnZ2d@comcast.com>
	<459CBAC8.9060007@v.loewis.de>
Message-ID: <64mdnTE_-5Ff3gDYnZ2dnUVZ_q6vnZ2d@comcast.com>

Martin v. L?wis wrote:
> Steven Bethard schrieb:
>> If someone has an idea how to include argparse features into optparse,
>> I'm certainly all for it. But I tried and failed to do this myself, so I
>> don't know how to go about it.
> 
> It's not necessary that the implementation is retained, only that the
> interface is preserved. So if you can come up with an implementation
> that supports all optparse applications, and adds the additional
> features, your implementation could replace the current optparse.
> If you need to make incompatible changes, it would be best if you
> could produce a list of such changes, so that optparse users can
> review them to find out whether they are affected.

FWIW, here's a short list of issues that could be easily addressed:

* alias ArgumentParser to OptionParser
* alias add_argument to add_option
* alias Values to Namespace
* alias OptionError and OptionValueError to ArgumentError
* alias add_help= keyword argument of ArgumentParser to add_help_option=
* alias namespace= keyword argument of parse_args to options=
* add the has_option, get_option and remove_option methods
* add the set_conflict_handler method
* add the destroy method
* add the set_usage method
* add the string names for types (e.g. "string", "str", "int", etc.) as
   aliases to the type objects (argparse already has a type registry for
   exactly these kinds of things)


Some slightly harder issues:

* ArgumentParser.parse_args returns a single namespace object, not an
   (options, args) tuple, since argparse handles positional arguments.
   This could probably be addressed by adding an __iter__ method to the
   Namespace object which would return (self, [])

* argparse uses standard string formatting specifiers, e.g. %(default)s
   and %(prog)s instead of optparse's %default and %prog. It could
   probably be hacked to support both though.

* argparse doesn't support {enable,disable}_interspersed_args() because
   their primary use case was for handling sub-parsers, which argparse
   handles through the add_subparsers method. It could probably be hacked
   to work though I guess.


And the issues that I don't see any good way to address:

* argparse makes the default value for a "store_true" action False, and
   the default value for a "store_false" action True. This is what users
   expect, but different from optparse where the default is always None.

* the ArgumentParser constructor doesn't accept the option_list=,
   option_class= or formatter= keyword arguments. Since argparse uses
   Action subclasses instead of a single Option class, the former two
   don't make much sense. And formatter= has been replaced with
   formatter_class= where the API of the formatter was dramatically
   changed. (That said, the formatter API is undocumented in both
   optparse and argparse.)

* the choices argument is now checked *after* arguments have been
   type-converted. This is intentional, so that you can specify, say
   xrange(100) instead of ["0", "1", "2", "3", ... "99"]. There is also
   no "choices" type anymore since any action can also specify their
   choices.

* argparse doesn't support ``callback`` actions because the same effects
   are better handled by defining a simple type-checking function and
   passing it as the type= keyword argument, or by subclassing
   argparse.Action and passing this as the action= keyword argument.
   I could probably add callback actions by creating an appropriate
   Action subclass and registering it. However, any code relying on
   parser.{largs,rargs,values} would break because the parsing algorithm
   is completely different in argparse.

* The `Extending optparse`_ section in the docs is pretty much
   completely inapplicable. One of the major goals of argparse was to get
   rid of the need to hack class attributes like TYPES, STORE_ACTIONS,
   etc. Instead, these things are handled by defining simple
   string-to-object functions that are passed to type= or by defining
   appropriate subclasses of argparse.Action which are passed to action=.
   Trying to support these sorts of things would be nearly impossible.


I guess I don't know how to proceed from here. I'm reluctant to start 
adding the code necessary to support even the easily solved issues when 
the issues that I don't know how to solve seem like they could be deal 
breakers.

STeVe

.. _Extending optparse: 
http://docs.python.org/lib/optparse-extending-optparse.html


From dummy at dummy.nl  Fri Jan 19 12:22:11 2007
From: dummy at dummy.nl (Cecil Westerhof)
Date: Fri, 19 Jan 2007 18:22:11 +0100
Subject: Is it possible to fasten the import of cgi?
References: <45af6f47$0$322$e4fe514c@news.xs4all.nl>
	<5q01r2p4hnnrm1b8fh5dul6qmoc1lsf4re@4ax.com>
Message-ID: <45b0fe43$0$333$e4fe514c@news.xs4all.nl>

Tim Roberts wrote:

> Cecil Westerhof <dummy at dummy.nl> wrote:
>>
>>I have a cgi-script dat uses the modules cgi, os, sys and time. Offcourse
>>I can not time the time used to import time, but os and sys do not take
>>more as a millisecond. My script itself takes 3 or 4 milliseconds. But
>>importing cgi takes 95 milliseconds. (This is on my test system a PII 300
>>MHz. Is there a way to make this more fast? The import off cgi makes the
>>script at least 20 times as slow. Something like mod-python is not a
>>possibility. I could use it on my test machine, but not at the osting
>>provider.
> 
> Realistically, do you plan to support more than a few dozen requests per
> minute?  If not, then it doesn't matter at all.  The script launch
> overhead is an insignificant part of the user's browser experience.

Not at the moment. The application is in alpha, so it is mostly a few
testers. At the moment it is going life I want to have another provider.
So I have a little time to search for another provider and select 'the best'
framework. ;-}



From ask at me  Wed Jan 10 23:11:28 2007
From: ask at me (alf)
Date: Wed, 10 Jan 2007 22:11:28 -0600
Subject: globals accros modules
Message-ID: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>

Hi,
executing main.py reulsts in following:


[andy at localhost andy]$ python main.py
Traceback (most recent call last):
   File "main.py", line 4, in ?
     amodule.f()
   File "/raid/home/andy/amodule.py", line 3, in f
     print a
NameError: global name 'a' is not defined

How can I have global globals without cyclical import?

A.


--------------------
amodule.py:
def f():
     global a
     print a
--------------------
main.py:
import amodule
a=1
amodule.f()




From gagsl-py at yahoo.com.ar  Fri Jan 26 23:03:50 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 27 Jan 2007 01:03:50 -0300
Subject: instancemethod
References: <mailman.2961.1169417800.32031.python-list@python.org><45b51298$0$8289$426a74cc@news.free.fr><ef60af090701221255m575701e7jaae6bd858acbea5c@mail.gmail.com><dea92f560701230608p469d5937ya658e2bb234c4941@mail.gmail.com><mailman.3041.1169586704.32031.python-list@python.org><45ba2b72$0$3007$426a34cc@news.free.fr>
	<pan.2007.01.27.00.07.59.387012@REMOVE.THIS.cybersource.com.au>
Message-ID: <epeiv1$qtq$1@sea.gmane.org>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> escribi? en el 
mensaje 
news:pan.2007.01.27.00.07.59.387012 at REMOVE.THIS.cybersource.com.au...

> On Fri, 26 Jan 2007 17:25:37 +0100, Bruno Desthuilliers wrote:
>>>    def __del__(self):
>>>        try:
>>>            self.close()
>>>        finally:
>>>            pass
>>>        except:
>>>            pass
>>
>> The finally clause is useless here.
>
> In principle, closing a file could raise an exception. I've never seen it
> happen, but it could. From the Linux man pages: [...]
> I assume that the same will apply in Python.

Note that he said that the *finally* clause were useless (and I'd say so, 
too), not the *except* clause.
And yes, in Python it is checked - when the close method was called 
explicitely, an exception is raised; when called when the object is garbage 
collected, a message is printed on sys.stderr

> It has to be said, however, that the error recovery shown ("pass") is
> fairly pointless :-)
Only supresses the message on sys.stderr - exceptions raised on __del__ are 
never propagated.

-- 
Gabriel Genellina 




From edquichan at yahoo.com  Thu Jan 18 15:38:08 2007
From: edquichan at yahoo.com (EdG)
Date: 18 Jan 2007 12:38:08 -0800
Subject: Traversing the properties of a Class
In-Reply-To: <slrneqvgtv.r0.horpner@FIAD06.norwich.edu>
References: <1169141253.332211.12790@38g2000cwa.googlegroups.com>
	<slrneqvgtv.r0.horpner@FIAD06.norwich.edu>
Message-ID: <1169152688.921153.26150@m58g2000cwm.googlegroups.com>

This works great.  I have one more question.  Now that I have the name
of the property, how do I get it's value?

I want to print  '%s = %s' % (attr,theattributesvalue)

Thanks.

Neil Cerutti wrote:
> On 2007-01-18, EdG <edquichan at yahoo.com> wrote:
> > For debugging purposes, I would like to traverse the class
> > listing out all the properties.
>
> This is the first thing that came to mind.
>
> def show_properties(cls):
>   for attr in dir(cls):
>     if isinstance(getattr(cls, attr), property):
>       print attr
>
> --
> Neil Cerutti
> 
> -- 
> Posted via a free Usenet account from http://www.teranews.com



From pkyoung at gmail.com  Wed Jan 24 02:24:12 2007
From: pkyoung at gmail.com (auditory)
Date: Wed, 24 Jan 2007 16:24:12 +0900
Subject: numpy or _numpy or Numeric?
Message-ID: <ep71iq$26m$1@news.kreonet.re.kr>

I am a newbie here

I am trying to read "space separated floating point data" from file

I read about csv module by searching this group,
but I couldn't read space separated values with csv.
(which may be matter of course..)

I also read about numpy.fromfile(file, sep=' ') which i can use.
but on my machine(ubuntu linux) numpy is unknown module,
which I didn't install by myself.

While trying to install numpy accroding to its homepage.
(http://numpy.scipy.org/numpydoc/numdoc.htm).
i am quite confused.

it's talking about the Numerical Python,
and it says to test whether it is installed or not,
try import Numeric instead of numpy.

I got Nurmeric modules and
as a matter of fact i got a file named '_numpy.so' in lib directory.

I can import _numpy but _numpy does not have 'fromfile' method

My question is:
1. Do i need to install numpy module?
2. Then Is it different from Numeric module?
3. Then where can i get it?

4. Or what is general way to read 'space separated values' from file?

Thanks in advance.


From ptmcg at austin.rr._bogus_.com  Thu Jan 11 09:14:05 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 11 Jan 2007 08:14:05 -0600
Subject: Reloading the already imported module
References: <1168519894.160024.70930@o58g2000hsb.googlegroups.com>
Message-ID: <45a6462c$0$16655$4c368faf@roadrunner.com>

<anil.pundoor at gmail.com> wrote in message 
news:1168519894.160024.70930 at o58g2000hsb.googlegroups.com...
> hi all,
>      i have following code
>
>
>  if <condition>
>      from SIPT.xml_param_mapping import MESSAGE_PARAMETER_MAPPING
>  else:
>      from SIPT.msg_param_mapping import MESSAGE_PARAMETER_MAPPING
>
>  parameter_list = MESSAGE_PARAMETER_MAPPING ['ABC' ]
>  for parms in parameter_list:
>      parameter_list[parms][4] = 'EXPORT'
>      parameter_list[parms][5] = 'IMPORT'
>
>
>       After this the xml_param_mapping gets altered. this process is
> repeated over couple of time. But every time i need to get a fresh
> xml_param_mapping. So how to relaod the already imported module??
>

Why not work with a copy of MESSAGE_PARAMETER_MAPPING['ABC'], and keep the 
original intact?  Change:

parameter_list = MESSAGE_PARAMETER_MAPPING ['ABC' ]

to

parameter_list = MESSAGE_PARAMETER_MAPPING ['ABC' ][:]

Now no reimport is required.

-- Paul





From nocl123 at gmail.com  Thu Jan 11 15:26:48 2007
From: nocl123 at gmail.com (nic)
Date: 11 Jan 2007 12:26:48 -0800
Subject: os.popen() not executing command on windows xp
In-Reply-To: <1168535370.211599.265250@p59g2000hsd.googlegroups.com>
References: <1168508553.151827.261420@k58g2000hse.googlegroups.com>
	<1168509560.119819.78470@o58g2000hsb.googlegroups.com>
	<1168535370.211599.265250@p59g2000hsd.googlegroups.com>
Message-ID: <1168547208.736198.295560@77g2000hsv.googlegroups.com>

It appears os.popen() doesn't like full windows paths with spaces (e.g.
"c:/program files") so I'm going to use the subprocess module.



From aboudouvas at panafonet.gr  Fri Jan  5 11:07:59 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 5 Jan 2007 08:07:59 -0800
Subject: program deployment
In-Reply-To: <1168012877.398078.59120@s80g2000cwa.googlegroups.com>
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
	<12psqtppgi5cme6@corp.supernews.com>
	<1168010377.179056.220500@s80g2000cwa.googlegroups.com>
	<1168012877.398078.59120@s80g2000cwa.googlegroups.com>
Message-ID: <1168013279.634426.84110@s80g2000cwa.googlegroups.com>

Ok, i got the point...Things are a little bit different on the other
way of the fence (Microsoft way...) and so many of Python's elements
are a little (at least) strange at first...

But hey, thank you all!



From beej at beej.us  Tue Jan 30 02:26:33 2007
From: beej at beej.us (Beej)
Date: 29 Jan 2007 23:26:33 -0800
Subject: Data structure and algorithms
In-Reply-To: <1170107403.836795.211280@k78g2000cwa.googlegroups.com>
References: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
	<1170095416.261460.157660@a34g2000cwb.googlegroups.com>
	<1170107403.836795.211280@k78g2000cwa.googlegroups.com>
Message-ID: <1170141993.558572.88830@m58g2000cwm.googlegroups.com>

On Jan 29, 1:50 pm, "azrael" <jura.gro... at gmail.com> wrote:
> thanks guys. i see that there is no way then to go back to C to
> satisfy my prof and get a grade

Seconding what Dennis says below, it is totally possible to use Python 
for this.

I didn't mean to discourage you from using Python--I just wanted to 
discourage you from trying to do it using the Python built-in list [].

In fact, given the time constraints and your dislike of structs, 
you're likely going to rip your hair out trying to get it going in C.

-Beej



From daniele.varrazzo at gmail.com  Thu Jan 18 06:38:37 2007
From: daniele.varrazzo at gmail.com (Daniele Varrazzo)
Date: 18 Jan 2007 03:38:37 -0800
Subject: One more regular expressions question
In-Reply-To: <1169113767.320500.71200@11g2000cwr.googlegroups.com>
References: <1169113767.320500.71200@11g2000cwr.googlegroups.com>
Message-ID: <1169120317.437211.73660@m58g2000cwm.googlegroups.com>

Victor Polukcht wrote:
> I have a couple of strings like:
>
> Unassigned Number (1)                                    32
[...]
> Interworking, unspecified (127)                          5
>
> I need to get:
> Error code (value in brackets) - Value - Message.
>
> My actual problem is i can't get how to include space, comma, slash.

Probably you have some escaping problem. The substitution:

  re.sub(r"^(.*)\s*\((\d+)\)\s+(\d+)", r'\2 - \3 - \1', row)

does the required job (where "row" is one of your lines)

To match a special character, such as "(", you need to escape it with a
"\", because it has a special meaning in the regexp syntax. Because "\"
is the escaping mechanism for Python strings too, you better use raw
strings to specify the pattern.

Other special character/groups matching patterns, such as "\s" to
specify whitespaces, are documented, together with everything else you
need, at http://docs.python.org/lib/re-syntax.html

HTH

Daniele



From smusnmrNOSPAM at yahoo.com  Fri Jan  5 09:24:49 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Fri, 5 Jan 2007 15:24:49 +0100
Subject: where is Microsoft Speech Object Library 5.1 option in PythonWin 2.5?
Message-ID: <enln3h$6sc$1@zam602.zam.kfa-juelich.de>

Hi all,

newbie question:
I'd like to try speech synthesis with PythonWin 2.5.

Problem
******
according to several instructions, such as found on
http://surguy.net/articles/speechrecognition.xml
and in a book on Python,

I have to select Tools | COM MakePy Utility | Microsoft Speech Object
Library 5.1, SDK 5.1, that is.

However, in my Python 2.5/PythonWin 2.5 installation I find as only option
"Microsoft Speech Object Library 5.0" to select.

Unfortunately, 5.1 is the lowest SDK version I found on
http://www.microsoft.com/downloads/details.aspx?FamilyId=5E86EC97-40A7-453F-B0EE-6583171B4530&displaylang=en#QuickInfoContainer

Will this PythonWin's Tools | COM MakePy Utility for 5.0 work with SDK 5.1?

Or will PythonWin's Tools | COM MakePy Utility  be updated to SDK 5.1, once
I have SDK 5.1 installed?

Thanks,

Siggi


















From postindex at gmail.com  Sun Jan 14 01:16:28 2007
From: postindex at gmail.com (postindex at gmail.com)
Date: 13 Jan 2007 22:16:28 -0800
Subject: Is it possible to get whole commandline include redirection.., etc
In-Reply-To: <mailman.2679.1168645162.32031.python-list@python.org>
References: <1168643505.949920.154470@a75g2000cwd.googlegroups.com>
	<mailman.2679.1168645162.32031.python-list@python.org>
Message-ID: <1168755387.944792.133690@38g2000cwa.googlegroups.com>

Thanks Steven.



From ptmcg at austin.rr.com  Tue Jan 23 19:03:44 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 23 Jan 2007 16:03:44 -0800
Subject: Simple Matrix class
In-Reply-To: <hk1dr2l3a4hgrmdqa0ejumk6kpd3d0giun@4ax.com>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>
	<hk1dr2l3a4hgrmdqa0ejumk6kpd3d0giun@4ax.com>
Message-ID: <1169597024.006653.268440@v45g2000cwv.googlegroups.com>

On Jan 23, 4:05 pm, Casey Hawthorne <caseyhHAMMER_T... at istar.ca>
wrote:
> Do you calcalate the matrix inversion, when you don't need to?
>

No, the inversion is only calculated on the first call to inverse(),
and memoized so that subsequent calls return the cached value
immediately.  Since the Matrix class is mutable, the cache is
invalidated if any of the matrix elements are updated.  So after
changing a matrix element, the inversion would be recalculated at the
next call to inverse().

Hope that clears things up.  You can also do your own experiments,
including adding verbose logging to the memoizing decorators - an
example is included in the source code.  Also the footprint is quite
small, just one Python source file, about 600-700 lines of code, and
all Python, so 100% portable.

-- Paul



From huayang.xia at gmail.com  Thu Jan 11 16:37:08 2007
From: huayang.xia at gmail.com (Huayang Xia)
Date: 11 Jan 2007 13:37:08 -0800
Subject: How to modify object attribute by python C API
Message-ID: <1168551428.114028.278940@77g2000hsv.googlegroups.com>

I get a python object by running a class' constructor. Then I need to
modify the instance's attribute just like obj.attr1.attr2 = 'a' if in
python's term.

    PyObject* py_obj_attr1 = PyObject_GetAttrString(obj, "attr1");
    PyObject_SetAttrString(py_obj_attr1, "attr2",
PyString_FromString("a"));
    Py_DECREF(py_obj_attr1);

The object py_obj_attr1 is said to be a "New reference". It's
confusing, does it refer to the same object as "obj.attr1" in python's
term? So that the above code equals: obj.attr1.attr2 = 'a' in python's
term.

I



From martin at v.loewis.de  Sun Jan 21 13:54:09 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 21 Jan 2007 19:54:09 +0100
Subject: A solution to the MSVCRT vs MSVCR71 problem?
In-Reply-To: <mailman.2959.1169390463.32031.python-list@python.org>
References: <1169348867.369917.104970@m58g2000cwm.googlegroups.com>	<mailman.2958.1169368253.32031.python-list@python.org>	<45B3267A.80605@v.loewis.de>
	<mailman.2959.1169390463.32031.python-list@python.org>
Message-ID: <45B3B6D1.2010400@v.loewis.de>

Gabriel Genellina schrieb:
> That's a good thing - but is this just by accident, or is documented
> somewhere?

It's documented somewhere (although I can't find the documentation
right now - it explains how you can link object files from a static
library compiled with an older compiler version against a new version
of the C library).

> I remember that I tried something like that in the past, and failed.
> (Perhaps earlier versions where not fully backwards compatible - or I
> didn't try hard enough that time).

It's been that way for ages, atleast since they started to support
32-bit code. So if you had problems, they might have had a different
source.

It's a different thing for the C++ libraries, though.

Regards,
Martin


From ghirai at ghirai.com  Thu Jan 18 11:20:28 2007
From: ghirai at ghirai.com (Ghirai)
Date: Thu, 18 Jan 2007 18:20:28 +0200
Subject: Login Form
Message-ID: <446678961.20070118182028@ghirai.com>

Hello python-list,

I need to make a login form, if possible without cookies.
Can anyone point me in the right direction? Or are there any
examples?

Thanks.

-- 
Best regards,
Ghirai.



From martin at v.loewis.de  Tue Jan  9 17:45:51 2007
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Tue, 09 Jan 2007 23:45:51 +0100
Subject: distutils and ctypes
In-Reply-To: <mailman.2497.1168377134.32031.python-list@python.org>
References: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>	<45A3FF17.2070509@v.loewis.de>
	<mailman.2497.1168377134.32031.python-list@python.org>
Message-ID: <45a41b1f$0$19653$9b622d9e@news.freenet.de>

Robert Kern schrieb:
>> Not sure it's stupid, but I wonder why you want to use ctypes. What's
>> wrong with extension modules?
> 
> What's wrong with ctypes? They're both valid, useful approaches to connect to C
> libraries.

See the original posting. Distutils doesn't support building arbitrary
shared libraries, but does support building extension modules.

Furthermore, extension modules are more type-safe and more expressive
than loading shared libraries through ctypes. IMO, you may consider
using ctypes as a last resort - if you have the chance for a
well-engineered solution, write a compiled wrapper.

Regards,
Martin


From steve at REMOVE.THIS.cybersource.com.au  Sat Jan  6 03:18:46 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 06 Jan 2007 19:18:46 +1100
Subject: Encoding / decoding strings
References: <1167999295.242042.79470@s34g2000cwa.googlegroups.com>
	<1168010144.000928.131920@42g2000cwt.googlegroups.com>
	<pan.2007.01.05.15.34.29.883744@gmx.net>
	<1168018757.397170.216870@11g2000cwr.googlegroups.com>
Message-ID: <pan.2007.01.06.08.18.46.210356@REMOVE.THIS.cybersource.com.au>

On Fri, 05 Jan 2007 09:39:17 -0800, oliver at obeattie.com wrote:

> Basically, what I am trying to do is display all comments by a
> specified user on the website. As the only thing which has =always=
> been used to identify users which never changes is their e-mail
> addresses, 

What are you talking about? I've changed my email address a dozen times
on many mailing lists and websites. I'm still me.

> this is the only thing which I can use. Obviously, I can't
> display this e-mail address though.

There is nothing obvious about that all all. Email addresses are usually
public. But okay, your users aren't expecting their email address to be
public.

Why not do what many jails do with prisoners? Everybody gets a unique
number. In your case, just walk through the database of users, giving
each one a number. You can't reverse engineer the email address from the
number without breaking into the database. Then your website can refer to
them as "Prisoner 123456789" which should be good for a few laughs.

Or simply take the username part of the address. So "fred at hotmail.com"
would become "fred". Then "fred at gmail.com" would become "fred1", and so
forth.

Obviously you don't try to generate the username from the email address
every single time, you do it once, and keep a list of used usernames so
that when "fred at yahoo.com" joins you know "fred" and "fred1" are both used
and he has to be "fred2".

md5 checksums can now be broken, in both directions: it is relatively
easy to generate collisions, and there are reverse md5 lookup tables.
I imagine your use of md5 would be especially easy to attack, since the
attacker knows that the string is an email address.



-- 
Steven.



From pavlovevidence at gmail.com  Sun Jan 21 21:42:32 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 21 Jan 2007 18:42:32 -0800
Subject: Reading Fortran Data
In-Reply-To: <1169429808.910298.10240@11g2000cwr.googlegroups.com>
References: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
	<1169424273.929396.133880@m58g2000cwm.googlegroups.com>
	<1169429808.910298.10240@11g2000cwr.googlegroups.com>
Message-ID: <1169433752.130978.133210@a75g2000cwd.googlegroups.com>


Beliavsky wrote:
> Carl Banks wrote:
>
> <snip>
>
> > >   WRITE(90,*) nfault,npoint
> >
> > Fortran writes this as two arbitrary integers separated by a space.
>
> I wrote a paragraph in my reply explaining why this is wrong.

It's a safe assumption for a line of two integers.  It might not
exactly produce what a Fortran program would, but it would work in a
read statement.

> A Fortran
> list-directed write can print results in an almost arbitrary format,
> depending on the compiler. Many compilers will separate integers by
> several spaces, not just one, and they could use commas instead of
> spaces if they wanted.

1. Hardly any compiler will produce a line of two integers, or reals,
that another compiler couldn't read back.
2. The number of spaces separating the numbers isn't important when
reading back free-form data.
3. Fear that a Fortran compiler might use commas or wrap lines at ten
columns or whatever, because it's not based on a standard, is misguided
paranoia.

> The number of items printed before a new line is
> started is also compiler-dependent. For more control, one uses a
> formatted write, for example
>
> write (90,"(2(1x,i0))") nfault,npoint

I think it's just more work to guard against something isn't very
relevant in practice.


Carl Banks



From jstroud at mbi.ucla.edu  Tue Jan 23 17:11:19 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 23 Jan 2007 14:11:19 -0800
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <ep60jp$63v$1@aioe.org>
References: <ep60jp$63v$1@aioe.org>
Message-ID: <ep6167$3tl$1@daisy.noc.ucla.edu>

Daniel Jonsson wrote:
> So, I've reached the point where my building pipeline tools actually 
> needs to be used by other people in my company. By this reason I 
> actually need to think about the usability, and I've come to the 
> conclusion that I need a GUI. So, which of the two packages should I 
> learn, and which one is easier to pick up? 
> Thanks in advance!
> 
> Daniel

You may also want to think about licensing issues. I think the license 
for QT is more restrictive than wx. Also, you might want to consider 
Tkinter.


From gandalf at designaproduct.biz  Fri Jan  5 14:19:33 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Fri, 05 Jan 2007 20:19:33 +0100
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
Message-ID: <459EA4C5.6090808@designaproduct.biz>

Stef Mientki wrote:
> Not sure I wrote the subject line correct,
> but the examples might explain if not clear
>
>
> *** first attempt ***
> class pin:
>    def __init__ (self):
>      self.Name  = 'Unknown Pin'
>
> aap = pin()             # create an instance
> aap.Name = 'aap'        # set it's name
> print aap.Name          # print it's name
>   
> 			# but why should I set it's name ??
> print 'aap'		# I can just as well print a constant string !!
>                          # (ok there will be an extra check)
>   
If you are trying to determine the name of your object, then you do not 
know what 'name' and 'object' means in Python. In this case, I recommend 
you this:

http://effbot.org/zone/python-objects.htm

In particular, pay attention to that objects can have zero or more names.

This is how you can create three unnamed objects:

L = [pin(),pin(),pin(),]

This is how you can bind three names to the same object:

p1 = p2 = p3 = pin()

Maybe I did not understand you question.

   Laszlo



From jmike at alum.mit.edu  Fri Jan 12 09:51:29 2007
From: jmike at alum.mit.edu (jmike at alum.mit.edu)
Date: 12 Jan 2007 06:51:29 -0800
Subject: Command line arguments on Vista
In-Reply-To: <1168613362.406648.304720@11g2000cwr.googlegroups.com>
References: <1168613362.406648.304720@11g2000cwr.googlegroups.com>
Message-ID: <1168613488.896113.326290@l53g2000cwa.googlegroups.com>

By the way, note that if I say (on Vista)

python printargs.py booga -a wooga

I get the desired output:

>      there are 4 args
>      arg: printargs.py
>      arg: booga
>      arg: -a
>      arg: wooga

So the quesiton still stands, what's up with that?

Thanks,
  --JMike



From gagsl-py at yahoo.com.ar  Tue Jan 30 12:39:28 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 14:39:28 -0300
Subject: Help me understand this
References: <1170140737.027139.14920@h3g2000cwc.googlegroups.com>
	<pan.2007.01.30.07.47.33.15637@REMOVEME.cybersource.com.au>
	<1170146755.446429.90720@v45g2000cwv.googlegroups.com>
Message-ID: <op.tmy9z2d9sd1mbx@gabriel2.softlabbsas.com.ar>

En Tue, 30 Jan 2007 06:34:01 -0300, Beej <beej at beej.us> escribi?:

> But here's one I still don't get:
>
>>>> type(2)
> <type 'int'>
>>>> type((2))
> <type 'int'>
>>>> (2).__add__(1)
> 3
>>>> 2.__add__(1)
>   File "<stdin>", line 1
>     2.__add__(1)
>             ^
> SyntaxError: invalid syntax

It appears to be a bug, either in the grammar implementation, or in the  
grammar documentation.
These are the relevant rules:

attributeref ::= primary "." identifier

primary ::= atom | attributeref | subscription | slicing | call

atom ::= identifier | literal | enclosure

literal ::= stringliteral | integer | longinteger | floatnumber |  
imagnumber

An integer is a primary so 2.__add(1) should be valid.

-- 
Gabriel Genellina



From bearophileHUGS at lycos.com  Wed Jan 31 07:52:31 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 31 Jan 2007 04:52:31 -0800
Subject: 'First class' Relationships
Message-ID: <1170247951.132373.227800@v45g2000cwv.googlegroups.com>

Currently reading an article, "First Class Relationships in an Object-
oriented Language", by Gavin Bierman and Alisdair Wren:
http://homepages.inf.ed.ac.uk/wadler/fool/program/final/4/4_Paper.pdf

Found in the "Lambda the Ultimate" blog:
http://lambda-the-ultimate.org/node/2013

Maybe it can be done in Python too, with a metaclass "Relationship".
The relation can probably be added dynamically to an object/class.
Some typecheek can be added too, if necessary.

Bye,
bearophile



From jstroud at mbi.ucla.edu  Mon Jan 22 01:10:17 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 21 Jan 2007 22:10:17 -0800
Subject: Is any python like linux shell?
In-Reply-To: <1169398326.510530.180860@51g2000cwl.googlegroups.com>
References: <1169398326.510530.180860@51g2000cwl.googlegroups.com>
Message-ID: <ep1kg9$uot$1@zinnia.noc.ucla.edu>

Frank Potter wrote:
> I learned some python in windows.
> And now I've turned to linux.
> I read a book and it teaches how to write shell script with bash,
> but I don't feel like the grammar of bash.
> Since I know about python,
> I want to get a linux shell which use python grammar.
> I searched by google and I found pysh, which is not maintained any
> more.
> There's another script named pyshell, which is not likely what I'm
> searching for.
> So, will somebody please tell me if there are any python like shells
> for linux?
> 

Best is to do simple things (ls, mv, rm, cp) via bash or tcsh and to use 
python for things of any greater complexity (even slightly more complex).

My strongest advice would be to let go of the idea of "shell scripting" 
altogether and begin to write programs built from libraries to solve 
your problems. The mere act of beginning to write a shell script (in, 
say, bash) will tie you to that "language", even when you realize your 
task was much more complex than you had originally imagined. It has 
happened to me time and time again.

James


From nospam at nospam.net  Sun Jan 28 12:38:00 2007
From: nospam at nospam.net (Andrew)
Date: Sun, 28 Jan 2007 09:38:00 -0800
Subject: socket.inet_ntop, and pton question
Message-ID: <12rpns1tkp0e34@corp.supernews.com>

Hi

Are these functions (inet_ntop(), inet_pton()) from the socket library 
supported on Windows.

If not is there an equivalent for them using Windows

Ive seen mention of people creating their own in order to use them

Appreciate the help

ty


From wbornor at gmail.com  Thu Jan 18 14:25:59 2007
From: wbornor at gmail.com (dubs)
Date: 18 Jan 2007 11:25:59 -0800
Subject: spidering script
In-Reply-To: <mailman.2881.1169146701.32031.python-list@python.org>
References: <8N6dnSE2eO6QKDLYnZ2dnUVZ_uejnZ2d@fdn.com>
	<mailman.2881.1169146701.32031.python-list@python.org>
Message-ID: <1169148359.297521.239630@v45g2000cwv.googlegroups.com>

Check out the quick start section in the documentation at Beautiful
Soup http://www.crummy.com/software/BeautifulSoup/


Wes


Jonathan Curran wrote:
> On Thursday 18 January 2007 11:57, David Waizer wrote:
> > Hello..
> >
> > I'm  looking for a script (perl, python, sh...)or program (such as wget)
> > that will help me get a list of ALL the links on a website.
> >
> > For example ./magicscript.pl www.yahoo.com and outputs it to a file, it
> > would be kind of like a spidering software..
> >
> > Any suggestions would be appreciated.
> >
> > David
>
> David, this is a touchy topic but whatever :P Look into sgmllib, and you can
> filter on the "A" tag. The book 'Dive Into Python' covers it quite nicely:
> http://www.diveintopython.org/html_processing/index.html
> 
> Jonathan



From gagsl-py at yahoo.com.ar  Tue Jan 30 18:23:07 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 20:23:07 -0300
Subject: PythonCard
References: <1170193549.583822.156450@k78g2000cwa.googlegroups.com>
Message-ID: <op.tmzpwtztsd1mbx@gabriel2.softlabbsas.com.ar>

En Tue, 30 Jan 2007 18:45:49 -0300, Tequila <wasadmin at optonline.net>  
escribi?:

> I'm having some trouble starting PythonCard on my PC.

Usually it's a good idea at least to read the installation instructions :)
http://pythoncard.sourceforge.net/windows_installation.html

-- 
Gabriel Genellina



From arkanes at gmail.com  Wed Jan 17 10:54:41 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 17 Jan 2007 09:54:41 -0600
Subject: Newbie: Capture traceback message to string?
In-Reply-To: <516tpnF1ic39jU1@mid.individual.net>
References: <mailman.2805.1168997715.32031.python-list@python.org>
	<516tpnF1ic39jU1@mid.individual.net>
Message-ID: <4866bea60701170754i50d6658fhf93af114fe0bee20@mail.gmail.com>

On 17 Jan 2007 15:31:03 GMT, Thomas Guettler
<guettli.usenet at thomas-guettler.de> wrote:
> Sean Schertell wrote:
>
> > Hello!
> >
> > I'm new to Python and this is my first post to the list.
> >
> > I'm trying to simply capture exception text to a few strings which
> > can be passed to a PSP page to display a pretty error message. The
> > problem is that I just can't seem to figure out how to get the basic
> > components of the traceback message into strings. Here's what I want
> > to do:
> >
>
>
> # http://www.thomas-guettler.de/vortraege/python/beispiele.py.txt
> def foo():
>     raise("Das ist eine Exception")
> try:
>     foo()
> except:
>     import traceback
>     import cStringIO
>     (exc_type, exc_value, tb) = sys.exc_info()
>     exc_file = cStringIO.StringIO()
>     traceback.print_exception(exc_type, exc_value, tb, file=exc_file)
>     exc_string=exc_file.getvalue()
>     print exc_string
>

This is a lot of extra work. traceback.format_exc is much simpler.


From klaus at seistrup.dk  Sat Jan  6 14:51:06 2007
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Sat, 6 Jan 2007 19:51:06 +0000 (UTC)
Subject: nntplib downloads content with extra linebreaks
References: <1168110213.436860@sj-nntpcache-1.cisco.com>
	<enosln$hn6$1@minji.szn.dk>
	<1168112276.194982@sj-nntpcache-1.cisco.com>
Message-ID: <enouja$k9m$1@minji.szn.dk>

Rweth wrote:

>    for aline in buf:
>       bufHeal.append(aline.replace('\r\n', '\n'))

What does one single aline look like?

> s.body(id,afile)

Does the 'afile' contain a filename or a filepointer?

Cheers,

-- 
Klaus Alexander Seistrup
http://klaus.seistrup.dk/



From richard.charts at gmail.com  Wed Jan  3 11:18:47 2007
From: richard.charts at gmail.com (Richard Charts)
Date: 3 Jan 2007 08:18:47 -0800
Subject: C/C++, Perl, etc. to Python converter
In-Reply-To: <G3Qmh.94$9v1.124@nntpserver.swip.net>
References: <G3Qmh.94$9v1.124@nntpserver.swip.net>
Message-ID: <1167841127.052786.175470@a3g2000cwd.googlegroups.com>


mm wrote:
> Is there a Perl to Python converter?
> Or in general: a XY to Python converter?
>
> Is see, that Python is much better then Perl anyway.
> But for beginners, they whant to konw how is this done with Python etc.
>
> Sure, there are some docus out there in the internet. But a converter?
I don't know of any converter, but I have seen a number of tutorials
that show how to do OO things in both perl and python for example.
Avi Kak of Purdue U. has one such tutorial.
When I took his class, he had a large package of notes that he said was
the basis for his next book.  It doesn't look like he ever got around
to publishing that one.
However, if you google his homepage, he does have at last one tutorial
posted for Perl vs. Python.



From steve at REMOVEME.cybersource.com.au  Wed Jan 31 01:52:12 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 31 Jan 2007 17:52:12 +1100
Subject: how to "free" an object/var ?
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
	<epolgl$8i4$1@zinnia.noc.ucla.edu>
Message-ID: <pan.2007.01.31.06.52.12.82782@REMOVEME.cybersource.com.au>

On Tue, 30 Jan 2007 15:48:37 -0800, James Stroud wrote:

> Stef Mientki wrote:
>> If I create a large array of data or class,
>> how do I destroy it (when not needed anymore) ?
>> 
>> Assign it to an empty list ?
>> 
>> thanks,
>> Stef Mientki
> 
> It will be gc'd when you leave the scope or you can call del() to 
> explicitly get rid of the object if its existence bothers you.

That is not quite correct.

big_list = ["data"]*1000000
another_reference = big_list
del big_list

At this point, the list of one million "data" strings still exists.

del big_list doesn't delete the list object, it removes the name
"big_list". Then, only if the list has a reference count of zero, Python
will dispose of the object and free the memory (if your OS allows that).
If there are still references to it, like "another_reference" above, it
will not be disposed of.

As far as I know there is no way to force the deletion of an object even
if it is in use. This is a Good Thing.


-- 
Steven D'Aprano 



From wise at hyperformix.com  Thu Jan 11 19:00:05 2007
From: wise at hyperformix.com (Tim)
Date: 11 Jan 2007 16:00:05 -0800
Subject: py2exe: zipfile=None raised ImportError
In-Reply-To: <1168543966.212663.141840@i56g2000hsf.googlegroups.com>
References: <1168543966.212663.141840@i56g2000hsf.googlegroups.com>
Message-ID: <1168560005.452340.249680@k58g2000hse.googlegroups.com>

I see the py2exe mail list posts to this group...

I think I have a handle on the problem: After I build the exe, I rename
it. The renamed exe is the one that raises the error. The original exe
works fine.

--
Tim



From martin at v.loewis.de  Sun Jan  7 14:32:38 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 07 Jan 2007 20:32:38 +0100
Subject: Newbie XML SAX Parsing: How do I ignore an invalid token?
In-Reply-To: <1168194830.741912.300290@51g2000cwl.googlegroups.com>
References: <1168033818.692201.183790@11g2000cwr.googlegroups.com>
	<mailman.2354.1168037149.32031.python-list@python.org>
	<1168054226.290465.325910@s34g2000cwa.googlegroups.com>
	<459f5e14$0$17107$9b622d9e@news.freenet.de>
	<1168194830.741912.300290@51g2000cwl.googlegroups.com>
Message-ID: <45A14AD6.1080002@v.loewis.de>

scott at crybabymaternity.com schrieb:
> Is there a Pythonic way to read the file and identify any illegal XML
> characters so I can strip them out? this would keep my program more
> flexible - if the vendor is going to allow one illegal character in
> their document, there's no way of knowing if another one will pop up
> later.

Notice that you are talking about bytes here, not characters. It is
inherently difficult to determine invalid bytes - you first have to
determine the encoding, then (mentally) decode, and then find out
whether there are any invalid characters.

The invalid XML characters can be found in

http://www.w3.org/TR/2006/REC-xml-20060816/#charsets

So invalid characters are #x0 .. #x8, #xB, #xC, #xE .. #x1F,
#xD800 .. #xDFFF, #xFFFE, #xFFFF.

If you restrict attention to only the invalid characters below
#x20 (i.e. control characters), and also restrict attention to
encodings that are strict ASCII supersets (ASCII, ISO-8859-x,
UTF-8), you can filter out the invalid characters on the byte
level. Otherwise, you have to decode, filter out on the character
level, and then encode again. Neither approach will deal with
bytes that are invalid wrt. the encoding.

To filter out these bytes, I recommend to use str.translate.
Make an identity table for the substitution, and put the
bytes you want deleted into the delete table.

Regards,
Martin


From wasadmin at optonline.net  Tue Jan 30 16:45:49 2007
From: wasadmin at optonline.net (Tequila)
Date: 30 Jan 2007 13:45:49 -0800
Subject: PythonCard
Message-ID: <1170193549.583822.156450@k78g2000cwa.googlegroups.com>

I'm having some trouble starting PythonCard on my PC.

I've downloaded and ran python-2.5.msi to install Python on my 
machine.  And PythonCard-0.8.2.win32.exe to install PythonCard.

When I try to run the program I get the following error:
======================================
C:\Python25\Lib\site-packages\PythonCard\tools
\codeEditor>codeEditor.py
Traceback (most recent call last):
  File "C:\Python25\Lib\site-packages\PythonCard\tools\codeEditor
\codeEditor.py", line 13, in <module>
    from PythonCard import about, configuration, dialog, log, menu, 
model, resource, util
  File "C:\Python25\lib\site-packages\PythonCard\about.py", line 8, in 
<module>
    import wx
ImportError: No module named wx
======================================

Does anyone know what the problem might be?

Thanks,
Tequila



From viscanti at gmail.com  Tue Jan 16 09:41:51 2007
From: viscanti at gmail.com (viscanti at gmail.com)
Date: 16 Jan 2007 06:41:51 -0800
Subject: urrlib2 multithreading error
Message-ID: <1168958510.834175.184730@a75g2000cwd.googlegroups.com>

Hi,

I'm using urllib2 to retrieve some data usign http in a multithreaded
application.
Here's a piece of code:
		req = urllib2.Request(url, txdata, txheaders)
		opener = urllib2.build_opener()
		opener.addheaders = [('User-agent', user_agent)]
		request = opener.open(req)
		data = request.read(1024)

I'm trying to read only the first 1024 bytes to retrieve http headers
(if is html then I will retrieve the entire page).
When I use it on a single thread everything goes ok, when I create
multiple threads the execution halts and the program terminates, just
before the last line (when I execute the request.read(.) ). Obviously I
tried to catch the exception but it doesn't work, the interpreter exits
without any exception or message.
How can I solve this?

lv



From paddy3118 at netscape.net  Mon Jan 22 21:26:24 2007
From: paddy3118 at netscape.net (Paddy)
Date: 22 Jan 2007 18:26:24 -0800
Subject: Best way to document Python code...
In-Reply-To: <1169492869.101706.253620@38g2000cwa.googlegroups.com>
References: <1169492869.101706.253620@38g2000cwa.googlegroups.com>
Message-ID: <1169519184.910635.197820@38g2000cwa.googlegroups.com>


Scott Huey wrote:

> I am working on a Python module and I would like to prepare some API
> documentaiton. I managed to find epydoc after some searching online.
>
> Is there a standard way to document the API for Python modules? Is
> epydoc the best way to go if there is no standard? Are there other ways
> to document a Python API?
>
> Thanks,
>
> Scott Huey

To add to the other replies: try adding a few doctests to your
docstrings. They can help show typical use cases even if you don't use
them for 'testing'  - and you can automatically keep the use cases
up-to-date.
http://en.wikipedia.org/wiki/Doctest

- Paddy.



From Eric_Dexter at msn.com  Sat Jan 13 22:41:06 2007
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 13 Jan 2007 19:41:06 -0800
Subject: Tkinter code (with pmw) executing to soon please help
Message-ID: <1168746063.322340.10410@l53g2000cwa.googlegroups.com>

Instead of creating my buttons and waiting for me to press them to
execute they are executing when I create them and won't do my callback
when I press them..  thanks for any help in advance

button[num] = Tkinter.Button(frame,text =  returnstring,
command=callback(returnstring))#

this line executes on creation

my output on startup is (should output when I choose an option)

1 String pad
10 Chorus
25 Reverb
30 Mixer


The buttons do label correctly.






title = 'csd instrument list'

# Import Pmw from this directory tree.
import sys
sys.path[:0] = ['../../..']

import Tkinter
import Pmw
import csoundroutines

class Demo:
 def __init__(self, parent):
    frame = Tkinter.Frame(parent)
    frame.pack(fill = 'both', expand = 1)

    button = {}

    instr = [[]]
    instr = csoundroutines.csdInstrumentList2(sys.argv[1])

    num = 0          #instr_number

    buttonBox = Pmw.ButtonBox(parent)
    for i in range(0, len(instr.instrnum)):
        num += 1
        returnstring = instr.instrnum[i] +' '+ str(instr.comments[i])
        #printstring = zz + x[num]
        button[num] = Tkinter.Button(frame,text =  returnstring,
command=callback(returnstring))#kinter.Buttonstr(x[0]) + ' ' + x[1])# +
comments)
        button[num].pack()
        #returnstring = zz
        button[num].grid(column=num, row =
0)#,command=callback(returnstring))
        #button[num].pack()



    frame.grid_rowconfigure(3, weight=1)
    frame.grid_columnconfigure(3, weight=1)
    frame.pack()
def callback(text):
    print text
######################################################################

# Create demo in root window for testing.
if __name__ == '__main__':
    global filename
    filename = (sys.argv[1])
    root = Tkinter.Tk()
    Pmw.initialise(root)
    root.title(title)

    exitButton = Tkinter.Button(root, text = 'Exit', command =
root.destroy)
    exitButton.pack(side = 'bottom')
    widget = Demo(root)
    root.mainloop()

http://www.dexrow.com



From skip at pobox.com  Thu Jan 18 09:20:53 2007
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 18 Jan 2007 08:20:53 -0600
Subject: Would a Dutch speaker please check this wiki page please?
In-Reply-To: <45af4735$0$322$e4fe514c@news.xs4all.nl>
References: <mailman.2852.1169070591.32031.python-list@python.org>
	<a9dd0$45aea341$d443bb3a$10472@news.speedlinq.nl>
	<45af4735$0$322$e4fe514c@news.xs4all.nl>
Message-ID: <17839.33349.948499.442225@montanaro.dyndns.org>


    Martin> Could be Afrikaans too, but the page is gone now so I can't
    Martin> check.

Actually, you can... ;-) Even though it's a nonexistent page, its history
still exists.  Poke the "Get Info" link and view the first revision of the
file.

Skip



From mccredie at gmail.com  Tue Jan 30 15:12:18 2007
From: mccredie at gmail.com (Matimus)
Date: 30 Jan 2007 12:12:18 -0800
Subject: Find and replace in a file with regular expression
In-Reply-To: <1170186744.322855.253550@j27g2000cwj.googlegroups.com>
References: <1170186744.322855.253550@j27g2000cwj.googlegroups.com>
Message-ID: <1170187938.235170.109870@s48g2000cws.googlegroups.com>

The re module is used for regular expressions. Something like this 
should work (untested):

 import fileinput, string, sys, re

 fileQuery = "Text.txt"
 sourceText = '''SOURCE'''
 replaceText = '''REPLACE'''

 def replace(fileName, sourceText, replaceText):
     file = open(fileName, "r")
     text = file.read() #Reads the file and assigns the value to a 
variable
     file.close() #Closes the file (read session)

     file = open(fileName, "w")
     file.write(re.sub(sourceText, replaceText,text))
     file.close() #Closes the file (write session)

     print "All went well, the modifications are done"

replacemachine(fileQuery, sourceText, replaceText)





From mike.klaas at gmail.com  Wed Jan 24 19:07:34 2007
From: mike.klaas at gmail.com (Klaas)
Date: 24 Jan 2007 16:07:34 -0800
Subject: The reliability of python threads
In-Reply-To: <mailman.3105.1169664198.32031.python-list@python.org>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
Message-ID: <1169683654.672020.136820@q2g2000cwa.googlegroups.com>

On Jan 24, 10:43 am, "Carl J. Van Arsdall" <cvanarsd... at mvista.com>
wrote:

> Yea, typically I would think that.  The problem I am seeing is
> incredibly intermittent.  Like a simple pyro server that gives me a
> problem maybe every three or four months.  Just something funky will
> happen to the state of the whole thing, some bad data, i'm having an
> issue tracking it down and some more experienced programmers mentioned
> that its most likely a race condition.  THe thing is, I'm really not
> doing anything too crazy, so i'm having difficult tracking it down.  I
> had heard in the past that there may be issues with threads, so I
> thought to investigate this side of things.

POSIX issues aside, Python's threading model should be less susceptible
to memory-barrier problems that are possible in other languages (this
is due to the GIL).  Double-checked locking, frinstance, is safe in
python even though it isn't in java.

Are you ever relying solely on the GIL to access shared data?

-Mike



From robert.kern at gmail.com  Sat Jan 27 22:26:09 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 27 Jan 2007 21:26:09 -0600
Subject: distutils, sdist and tests
In-Reply-To: <udOdnWW5l4N-jCHYnZ2dnUVZ_v-tnZ2d@comcast.com>
References: <Jaudna0fMYmIBCbYnZ2dnUVZ_sKunZ2d@comcast.com>	<mailman.3235.1169934632.32031.python-list@python.org>
	<udOdnWW5l4N-jCHYnZ2dnUVZ_v-tnZ2d@comcast.com>
Message-ID: <eph54i$e55$1@sea.gmane.org>

Steven Bethard wrote:
> Robert Kern wrote:
>> Steven Bethard wrote:
>>> How do I get distutils to include my testing module in just the "sdist" 
>>> distribution?
>> Use a MANIFEST.
>>
>>   http://docs.python.org/dist/source-dist.html

Also, I just noted this tidbit:

"""If you don't supply an explicit list of files (or instructions on how to
generate one), the sdist command puts a minimal default set into the source
distribution:
  ...
  * anything that looks like a test script: test/test*.py (currently, the
Distutils don't do anything with test scripts except include them in source
distributions, but in the future there will be a standard for testing Python
module distributions)
  ...
"""

So you can just stick test_argparse.py into a test/ directory. Having tested
this, it appears to work (see below).

>>> I want test_argparse.py to be available in the source distribution, but 
>>> I don't think it should be included in the binary distributions.
> 
> Using a MANIFEST appears to do the same thing as putting "test_argparse" 
> into py_modules -- that is, it puts "test_argparse.py" into both "sdist" 
> and "bdist" distributions. In "bdist" distributions it gets installed to 
> the site-packages directory like any other module.

Are you sure that you don't have changes left over in your setup.py when you
tested that? Also check that you clear out your build/ directory every time. I
think the bdist_* commands tend to just copy whatever is in the appropriate
build/lib.*/ directory even though you've changed how those files should be
generated.

This is what I get with setup.py unmodified. The only thing I added was
MANIFEST.in and an empty test_argparse.py file.

[argparse]$ ls
MANIFEST.in      PKG-INFO         README.txt       argparse.py      setup.py
     test_argparse.py
[argparse]$ cat MANIFEST.in
include PKG-INFO
include *.txt
include *.py
[argparse]$ python setup.py bdist_dumb
running bdist_dumb
running build
running build_py
creating build
creating build/lib
copying argparse.py -> build/lib
installing to build/bdist.macosx-10.3-fat/dumb
running install
running install_lib
creating build/bdist.macosx-10.3-fat
creating build/bdist.macosx-10.3-fat/dumb
creating build/bdist.macosx-10.3-fat/dumb/Library
creating build/bdist.macosx-10.3-fat/dumb/Library/Frameworks
creating build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework
creating
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions
creating
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5
creating
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib
creating
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5
creating
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages
copying build/lib/argparse.py ->
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages
byte-compiling
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/argparse.py
to argparse.pyc
running install_egg_info
Writing
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/argparse-0.5.0-py2.5.egg-info
creating /Users/rkern/src/argparse/dist
tar -cf /Users/rkern/src/argparse/dist/argparse-0.5.0.macosx-10.3-fat.tar .
gzip -f9 /Users/rkern/src/argparse/dist/argparse-0.5.0.macosx-10.3-fat.tar
removing 'build/bdist.macosx-10.3-fat/dumb' (and everything under it)
[argparse]$ tar ztf dist/argparse-0.5.0.macosx-10.3-fat.tar.gz
./
./Library/
./Library/Frameworks/
./Library/Frameworks/Python.framework/
./Library/Frameworks/Python.framework/Versions/
./Library/Frameworks/Python.framework/Versions/2.5/
./Library/Frameworks/Python.framework/Versions/2.5/lib/
./Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/
./Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/
./Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/argparse-0.5.0-py2.5.egg-info
./Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/argparse.py
./Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/argparse.pyc
[argparse]$ python setup.py sdist
running sdist
reading manifest template 'MANIFEST.in'
writing manifest file 'MANIFEST'
creating argparse-0.5.0
making hard links in argparse-0.5.0...
hard linking PKG-INFO -> argparse-0.5.0
hard linking README.txt -> argparse-0.5.0
hard linking argparse.py -> argparse-0.5.0
hard linking setup.py -> argparse-0.5.0
hard linking test_argparse.py -> argparse-0.5.0
tar -cf dist/argparse-0.5.0.tar argparse-0.5.0
gzip -f9 dist/argparse-0.5.0.tar
removing 'argparse-0.5.0' (and everything under it)
[argparse]$ tar ztf dist/argparse-0.5.0.tar.gz
argparse-0.5.0/
argparse-0.5.0/argparse.py
argparse-0.5.0/PKG-INFO
argparse-0.5.0/README.txt
argparse-0.5.0/setup.py
argparse-0.5.0/test_argparse.py


And this is what I get when I put test_argparse.py into a test/ directory:

[argparse]$ ls
PKG-INFO    README.txt  argparse.py setup.py    test
[argparse]$ python setup.py bdist_dumb
running bdist_dumb
running build
running build_py
creating build
creating build/lib
copying argparse.py -> build/lib
installing to build/bdist.macosx-10.3-fat/dumb
running install
running install_lib
creating build/bdist.macosx-10.3-fat
creating build/bdist.macosx-10.3-fat/dumb
creating build/bdist.macosx-10.3-fat/dumb/Library
creating build/bdist.macosx-10.3-fat/dumb/Library/Frameworks
creating build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework
creating
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions
creating
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5
creating
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib
creating
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5
creating
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages
copying build/lib/argparse.py ->
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages
byte-compiling
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/argparse.py
to argparse.pyc
running install_egg_info
Writing
build/bdist.macosx-10.3-fat/dumb/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/argparse-0.5.0-py2.5.egg-info
creating /Users/rkern/src/argparse/dist
tar -cf /Users/rkern/src/argparse/dist/argparse-0.5.0.macosx-10.3-fat.tar .
gzip -f9 /Users/rkern/src/argparse/dist/argparse-0.5.0.macosx-10.3-fat.tar
removing 'build/bdist.macosx-10.3-fat/dumb' (and everything under it)
[argparse]$ tar ztf dist/argparse-0.5.0.macosx-10.3-fat.tar.gz
./
./Library/
./Library/Frameworks/
./Library/Frameworks/Python.framework/
./Library/Frameworks/Python.framework/Versions/
./Library/Frameworks/Python.framework/Versions/2.5/
./Library/Frameworks/Python.framework/Versions/2.5/lib/
./Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/
./Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/
./Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/argparse-0.5.0-py2.5.egg-info
./Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/argparse.py
./Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/argparse.pyc
[argparse]$ python setup.py sdist
running sdist
warning: sdist: manifest template 'MANIFEST.in' does not exist (using default
file list)
writing manifest file 'MANIFEST'
creating argparse-0.5.0
creating argparse-0.5.0/test
making hard links in argparse-0.5.0...
hard linking README.txt -> argparse-0.5.0
hard linking argparse.py -> argparse-0.5.0
hard linking setup.py -> argparse-0.5.0
hard linking test/test_argparse.py -> argparse-0.5.0/test
tar -cf dist/argparse-0.5.0.tar argparse-0.5.0
gzip -f9 dist/argparse-0.5.0.tar
removing 'argparse-0.5.0' (and everything under it)
[argparse]$ tar ztf dist/argparse-0.5.0.tar.gz
argparse-0.5.0/
argparse-0.5.0/argparse.py
argparse-0.5.0/PKG-INFO
argparse-0.5.0/README.txt
argparse-0.5.0/setup.py
argparse-0.5.0/test/
argparse-0.5.0/test/test_argparse.py

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From karyn at calarts.edu  Fri Jan 12 12:15:44 2007
From: karyn at calarts.edu (Karyn Williams)
Date: Fri, 12 Jan 2007 09:15:44 -0800
Subject: What is a perl hash in python
In-Reply-To: <8301441.post@talk.nabble.com>
Message-ID: <3.0.1.32.20070112091544.0155fa80@muse.calarts.edu>

I am new to Pyton. I am trying to modify and understand a script someone
else wrote. I am trying to make sense of the following code snippet. I know
line 7 would be best coded with regex. I first would like to understand
what was coded originally. thelistOut looks like a hash to me (I'm more
familiar with perl). Perhaps someone could translate from perl to python
for me - not in code but just in concept.


Here is the code. This script is reading the list thelistOut and then
removing any items in RSMlist and taking the remainder and putting them in
graphAddressOut with the formatting.

This is a SAMPLE of what is in the lists referenced below in the loop:


thelistOut = [(632,
['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_9.log']), (145,
['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_13.log']), (0,
['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_5.log'])]

RSMList = ['172.16.0.1_1', '172.16.0.1_2', '172.16.0.1_3', '172.16.0.1_4',
'172.16.0.1_5']



#--------------------------Loop 1 -------------------------
       
    w = 0
    while w < 45:
       
       fileOut = string.split(thelistOut[w][1][0],".log")
       fileOutSplitedCommon = string.split(fileOut[0], "main/")
       fileOut2D = string.split(fileOutSplitedCommon[1], "/")
       fileOut = string.split(fileOut[0],"data-dist")

       if fileOut2D[1] in RSMList:
          w = w + 1
          continue
       graphAddressOut = tag1 + logUrl + fileOut[1] + extention1 + tag2 +
"<b>SWITCH: " + string.swapcase(fileOut2D[0]) + "&nbsp;&nbsp;&
nbsp;PORT ID: " + fileOut2D[1] + "</b><br>" + imgTitleTag + imgTag1 +
logUrl + fileOut[1] + extention2 + imgTag2 + tag3 + tag5
       outputOut.append(graphAddressOut)
       strOut = strOut + graphAddressOut

       w = w + 1

#--------------------------Loop 1 -------------------------

-- 

Karyn Williams
Network Services Manager
California Institute of the Arts
karyn at calarts.edu
http://www.calarts.edu/network


From elrondrules at gmail.com  Fri Jan 26 21:51:58 2007
From: elrondrules at gmail.com (elrondrules at gmail.com)
Date: 26 Jan 2007 18:51:58 -0800
Subject: help with subscription to a process
Message-ID: <1169866318.333371.238530@a34g2000cwb.googlegroups.com>

Hi

I am new to python and hence need some help

i have a process A that posts events as XML docs.
I need to create a listener to this process that subscribes to the
process A and as and when a XML doc is posted parse it.
I have creted an interface where if I specify the port number on which
the listener is running the process A will automatically start posting
events.

The place I need help is to create a listener and a way of parsing the
XML docs. If you can give me some starting points or docs/resources
that will be great..

Thanks



From perica.zivkovic at gmail.com  Sat Jan 13 06:19:17 2007
From: perica.zivkovic at gmail.com (perica.zivkovic at gmail.com)
Date: 13 Jan 2007 03:19:17 -0800
Subject: Portable Python - free portable development environment !
In-Reply-To: <9a6bb$45a8bd39$d443bb3a$8938@news.speedlinq.nl>
References: <1168533423.224355.221390@k58g2000hse.googlegroups.com>
	<mailman.2598.1168551029.32031.python-list@python.org>
	<1168639781.763133.319580@s34g2000cwa.googlegroups.com>
	<mailman.2676.1168641529.32031.python-list@python.org>
	<1168684571.205607.277920@s34g2000cwa.googlegroups.com>
	<9a6bb$45a8bd39$d443bb3a$8938@news.speedlinq.nl>
Message-ID: <1168687153.872917.81390@11g2000cwr.googlegroups.com>

Stef,

I never used Python4Delphi but I added it to the
list-of-things-to-examine :)

FOR ALL: I created google group for Portable Python
http://groups-beta.google.com/group/portablepython and posted few items
for discussion there :) Please if you have ideas/suggestions post it
there!

grtz

Perica


On Jan 13, 12:06 pm, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl>
wrote:
> > and something like Enthought edition will be there :) with even more
> > packages and options :) at least that is my goal for the future :) But
> > I must say I will also always be carefull with size of the distro :)
> > thats also important right? :)Coming from MatLab, that's not the most important thing ;-)
>
> > more ideas?Embedded use of Python (e.g. Python4Delphi)...
> ... I can imagine it needs special requirements ?
> 
> cheers,
> Stef



From nanjundi at gmail.com  Mon Jan 15 20:18:21 2007
From: nanjundi at gmail.com (Nanjundi)
Date: 15 Jan 2007 17:18:21 -0800
Subject: Can't find module named 'svn' in python
References: <1168907290.539976.117270@51g2000cwl.googlegroups.com>
Message-ID: <1168910301.679069.166460@q2g2000cwa.googlegroups.com>

My first thought:
Check if you have /usr/local/lib/svn-python/ in your PYTHONPATH
environment variable (echo $PYTHONPATH).

If its missing, set it in the environment.
export PYTHONPATH=$PYTHONPATH:/usr/local/lib/svn-python

-N

yinglcs at gmail.com wrote:
> Hi,
>
> i have a simple test which tries to load 'svn' moddule.
>
> # python -c "from svn import client"
> Traceback (most recent call last):
>  File "<string>", line 1, in ?
> ImportError: No module named svn
>
> I have checked I have sub-directories 'libsvn', 'svn' under
> /usr/local/lib/svn-python/
>
>  cd /usr/local/lib/svn-python/
> [root at localhost svn-python]# ls
> libsvn  svn
>
> But python still can't find it. Please tell me what am I missing. I
> appreciate your help.



From faulkner891 at gmail.com  Thu Jan 25 21:22:51 2007
From: faulkner891 at gmail.com (faulkner)
Date: 25 Jan 2007 18:22:51 -0800
Subject: Lython
Message-ID: <1169778170.982274.46780@v45g2000cwv.googlegroups.com>

I have Lython!
I want to make sure that anybody else who wants it can access it, so,
unless Mr. Egan objects, I'm hosting it here:
http://home.comcast.net/~faulkner612/programming/python/lython.zip
I had to patch it a bit because the number of arguments to
compiler.ast.Function.__init__ changed between 2.3 and 2.4, when
decorators were introduced. I haven't tested it on 2.5 because the last
time I upgraded python, my gentoo died.
I also took the liberty of adding some features such as primitive
interactivity, a '-c code' option, a '-h' option, an rc file
'~/.lythonrc.ly', and a '-o file' option which dumps bytecode to file.
I've slated developing support for *args, **kwargs, default arguments,
+= and -= etc., reader macros ala common lisp, classes,
try...except...finally, and raise.

For the curious, here are some other implementations of lisp in python:
http://ibiblio.org/obp/py4fun/lisp/lisp.html
http://hkn.eecs.berkeley.edu/~dyoo/python/pyscheme/
http://www.xs4all.nl/~yduppen/site/psyche.html
http://www.biostat.wisc.edu/~annis/creations/PyLisp/

These implementations are great, but Lython has macro capabilities,
generates python byte code, and demonstrates the use of spark, a
fantastic parsing package.



From martin at v.loewis.de  Fri Jan  5 04:30:11 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 05 Jan 2007 10:30:11 +0100
Subject: checking one's type
In-Reply-To: <mailman.2314.1167986448.32031.python-list@python.org>
References: <mailman.2314.1167986448.32031.python-list@python.org>
Message-ID: <459e1aa4$0$17143$9b622d9e@news.freenet.de>

belinda thom schrieb:
> I've been using the following hack to determine if a type is acceptable
> and I suspect there is a better way to do it:
> 
> e.g.
> 
> if type(s) == type("") :
>    print "okay, i'm happy you're a string"
> 
> If anyone knows a better way, I'm all ears.

There are several way to improve it. In order from smaller to larger
changes:
- don't use type(""), instead, use str:
  if type(s) == str:
  [notice: this works only from Python 2.2 or so]
- you can compare types by identity and don't need to compare for
  equality:
  if type(s) is str
- you can do instance tests with isinstance:
  if isinstance(s, str):
- try avoiding instance tests altogether. Instead, just let callers
  pass anything, and then let the operations fail if they can't handle
  the types.

Regards,
Martin


From mail at microcorp.co.za  Sun Jan 14 00:47:13 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 14 Jan 2007 07:47:13 +0200
Subject: General Question About Python
References: <1168254451.098796.144790@42g2000cwt.googlegroups.com><1168586849.047301.301680@s34g2000cwa.googlegroups.com><mailman.2684.1168670102.32031.python-list@python.org>
	<1168687033.258472.16090@v45g2000cwv.googlegroups.com>
Message-ID: <006401c7379f$712ab320$03000080@hendrik>

 "Torabisu" <tpawley at gmail.com> wrote:


> 
> Hendrik van Rooyen wrote:

> > What do you want done? - I am only a thousand miles away...
> >
> 
> If I can just get my Python teleporter sorted out, distance will be no
> problem...  A little buggy at the moment though...  Poor John, I told
> him not to test it but oh well.
 
OMG!  - I have been feeding that unexpected heap of minced meat
to the cat...

- Hendrik



From rschroev_nospam_ml at fastmail.fm  Sat Jan 20 11:05:26 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 20 Jan 2007 16:05:26 GMT
Subject: OT Annoying Habits (Was: when format strings attack)
In-Reply-To: <mailman.2917.1169243036.32031.python-list@python.org>
References: <mailman.2917.1169243036.32031.python-list@python.org>
Message-ID: <a5rsh.300668$E15.6019201@phobos.telenet-ops.be>

Carroll, Barry schreef:
> Secondly, can someone point me to the Standard Usenet Convention that
> mandates against top-posting.  This is not sarcasm; I would really like
> to see it.  You see, I recently returned to Usenet after a LONG absence.
> When I was last a regular Usenet citizen the Internet was new, GUI
> interfaces were experimental and the World Wide Web didn't exist yet.
> Newsreader software was text-based.  Top-posting was the common
> practice, because it was the most convenient: you didn't have to page
> through an arbitrarily large number of messages, most of which you'd
> already read umpteen times, to get to the new stuff you were interested
> in.  

I started to use the Internet and Usenet around 1992 or 1993, and at the 
time 'Netiquette' was a very common word. Amongst others it recommends 
inline replying (as opposed to both top-posting and bottom-posting), in 
spirit if not in exact wording.

The Wikipedia article on Netiquette 
(http://en.wikipedia.org/wiki/Netiquette) mentions it with as many words:
"Quoting should be interspersed, with a response that follows the 
relevant quoted material. The result should read like a conversation, 
with quotes indented to aid in skimming. A common mistake is to put all 
new text above the quoted material, without trimming any irrelevant 
text. This results in a message that is much harder to follow and is 
much less clear in context."

All groups I read at the time used that convention. In my experience it 
was only in more recent times that people started to use top-posting, 
and then only in newsgroups, forums, etc. that didn't originate in the 
original Internet culture.

> So I'd really like to know what the standard is now.  I like to know
> which rules I'm choosing to break.  ;^)

You could do worse than RFC 1855 (http://www.dtcc.edu/cs/rfc1855.html) 
and the above mentioned Wikipedia article. Both cover many other issues 
regarding online behavior. There's also 
http://wiki.ursine.ca/Top_Posting which just covers quoting practices.

But note that inline replying isn't as wide-spread as I think it ought 
to be. Places that don't have roots in Internet or Unix culture are much 
more likely to accept and even encourage top-posting.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From gagsl-py at yahoo.com.ar  Fri Jan  5 11:45:52 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 05 Jan 2007 13:45:52 -0300
Subject: where is Microsoft Speech Object Library 5.1 option in
	PythonWin 2.5?
In-Reply-To: <enln3h$6sc$1@zam602.zam.kfa-juelich.de>
References: <enln3h$6sc$1@zam602.zam.kfa-juelich.de>
Message-ID: <7.0.1.0.0.20070105134124.05cacec0@yahoo.com.ar>

At Friday 5/1/2007 11:24, siggi wrote:

>However, in my Python 2.5/PythonWin 2.5 installation I find as only option
>"Microsoft Speech Object Library 5.0" to select.

This list shows all the COM objects currently registered in Windows, 
does not depend on Pythonwin.

>Unfortunately, 5.1 is the lowest SDK version I found on
>http://www.microsoft.com/downloads/details.aspx?FamilyId=5E86EC97-40A7-453F-B0EE-6583171B4530&displaylang=en#QuickInfoContainer

After you download and install version 5.1, it should appear on the list.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From arkanes at gmail.com  Thu Jan  4 13:42:30 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 4 Jan 2007 12:42:30 -0600
Subject: Using External Libraries with python?
In-Reply-To: <459D2F8E.1080600@v.loewis.de>
References: <mailman.2288.1167928335.32031.python-list@python.org>
	<459D2F8E.1080600@v.loewis.de>
Message-ID: <4866bea60701041042t2c9ee250u5ba31b9b3c978d6b@mail.gmail.com>

On 1/4/07, "Martin v. L?wis" <martin at v.loewis.de> wrote:
> Ognjen Bezanov schrieb:
> > I have some external C libraries I would like to use with python.
> >
> > I have been searching on the internet and found many such
> > modules/bindings for libraries (e.g. Py-Lame) but have not yet
> > come across any information of how to actually go about creating such
> > bindings, so I was wondering if anybody here could point me in the right
> > direction?
>
> There are several methods. One is to write a Python C module by hand,
> using the Python C API:
>
> http://docs.python.org/ext/ext.html
> http://docs.python.org/api/api.html
>
> Essentially, all you need is a DLL/shared-object with an init
> function.
>
> Other solutions include tools that generate extension modules
> automatically (such as SWIG or Pyrex), or using libraries on
> top of the C API (such as Boost.Python).
>
> I personally always use the C API directly.
>
> Regards,
> Martin

Don't forget calling the using the external library directly from
Python by using ctypes.


From vmalloc at gmail.com  Thu Jan 25 16:31:13 2007
From: vmalloc at gmail.com (Rotem)
Date: 25 Jan 2007 13:31:13 -0800
Subject: Possible bug in Python 2.5? (Was Re: pdb in python2.5)
In-Reply-To: <wihps92sysg.fsf_-_@panix3.panix.com>
References: <1169717486.230356.79730@l53g2000cwa.googlegroups.com>
	<wihtzyfs17s.fsf@panix3.panix.com>
	<wihps92sysg.fsf_-_@panix3.panix.com>
Message-ID: <1169760673.197226.206540@a75g2000cwd.googlegroups.com>

Hi,

I noticed that pydb.pm() also fails in python2.5 when invoked on that
same example (seems like also trying to access a nonexistent
attribute/variable).

Is this known to you as well/was it fixed?

On Jan 25, 9:15 pm, r... at panix.com (R. Bernstein) wrote:
> I'd like to change my assessment of whether the problem encountered is
> a pdb bug or not. It could be a bug in Python. (Right now it is only
> known to be a bug in version 2.5.)
>
> For a given traceback t, the question is whether t.tb_frame.f_lineno
> can ever be different from t.tb_lineno.
>
> Still, for now in pydb CVS, I've worked around this by checking.
>
> r... at panix.com (R. Bernstein) writes:
> > "Rotem" <vmal... at gmail.com> writes:
>
> > > Hi,
>
> > > Maybe I'm repeating a previous post (please correct me if I am).
>
> > > I've tried the following code in python 2.5 (r25:51908, Oct  6 2006,
> > > 15:22:41)
> > > example:
>
> > > from __future__ import with_statement
> > > import threading
>
> > > def f():
> > >     l = threading.Lock()
> > >     with l:
> > >         print "hello"
> > >         raise Exception("error")
> > >         print "world"
>
> > > try:
> > >     f()
> > > except:
> > >    import pdb
> > >    pdb.pm()
>
> > > This fails because pdb.pm() attempts to access sys.last_traceback which
> > > is not assigned.
>
> > Recent releases of pydb (http://bashdb.sf.net/pydb) don't suffer this
> > problem. (But see below.)
>
> > > Trying:
> > > pdb.post_mortem(sys.exc_traceback)
>
> > > Yields the following:
> > > > test.py(9)f()
> > > -> print "world"
> > > (Pdb)
>
> > > the 'w' command yields a similar output, which implies that the
> > > exception was thrown from the wrong line.
> > > the traceback module is better, yielding correct results (displays line
> > > 8 instead of 9).
>
> > > Has anyone encountered this behavior?
>
> > Yes, this seems to be a bug in pdb. It is using the traceback's f_line
> > instance variable rather than the tb_lineno instance variable. I guess
> > these two values are usually the same. In fact, I haven't been able to
> > come up with a Python 2.4 situtation where they are different. (If
> > someone can, I'd appreciate it if you'd send me a small example so I
> > can put it in the pydb regression tests.) Even in 2.5, it's kind of
> > hard to get a case where they are different. If I remove the "with",
> > the problem goes away.
>
> > It was also bug in pydb, but I've just committed in CVS the fix for
> > this
>
> > > is pdb broken?
>
> > Best as I can tell pdb isn't all that well maintained. (Had it been, I
> > probably wouldn't have devoted the time to pydb that I have been.)
>
> > > I get similar results for larger/more complex pieces of code.
> 
> > > Thanks in advance,
> 
> > > Rotem



From bj_666 at gmx.net  Wed Jan 17 04:04:59 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 17 Jan 2007 10:04:59 +0100
Subject: How to determine what exceptions a method might raise?
References: <12qq98ijkn5mld8@corp.supernews.com>
	<mailman.2796.1168985816.32031.python-list@python.org>
	<1169022894.357383.45950@a75g2000cwd.googlegroups.com>
Message-ID: <pan.2007.01.17.09.04.58.628037@gmx.net>

In <1169022894.357383.45950 at a75g2000cwd.googlegroups.com>, George Sakkis
wrote:
> Ben Finney wrote:
>
>> But, in case it helps: Any code may raise any exception at any
>> time. This is a feature, since it encourages program that are tested
>> properly.
> 
> That's a silly argument, really, unless perhaps you'd consider a box of
> pills that look like M&Ms a 'feature' since it encourages parents to
> hide them from their kids. A better answer would be along the lines of
> "yes, that would be nice to have but in general it's not possible in a
> dynamic language; that's the price you have to pay for leaving the
> static typing world".

I don't thing that's a dynamic vs. static thing because in statically
typed languages it's not that easy to find out all possible exceptions
unless the language forces you to declare them.

Ciao,
	Marc 'BlackJack' Rintsch


From pretoriano_2001 at hotmail.com  Sun Jan  7 20:21:19 2007
From: pretoriano_2001 at hotmail.com (vizcayno)
Date: 7 Jan 2007 17:21:19 -0800
Subject: Recommendations (or best practices) to define functions (or methods)
Message-ID: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>

Hello:
Need your help in the "correct" definition of the next function. If
necessary, I would like to know about a web site or documentation that
tells me about best practices in defining functions, especially for
those that consider the error exceptions management.
I have the next alternatives but I think there are better:

Alternative 1:
=============
def ExecuteSQL(cmdSQL, cursor):
    try:
        cursor.execute(cmdSQL)
    except Exception, e:
        return e
    return 1

Seems a good solution but the function is not returning an uniform
type, should the code that receives the function result decides the
error display according of datatype? If I do this in C# I think I will
have problems.


Alternative 2:
=============
def ExecuteSQL(cmdSQL, cursor):
    try:
        cursor.execute(cmdSQL)
    except Exception, e:
        return 0, e   # or return (0,e.message)
    return 1, "ok"    # or return (1, "ok")
Sounds good, but seems forced. When doing return 1, "ok" I am doing
redundancy and I have problems with the type (e is exception type and
"ok" is string).


Alternative 3:
=============
def ExecuteSQL(cmdSQL, cursor):
    try:
        cursor.execute(cmdSQL)
    except Exception, e:
        print "ERROR:", e
        return 0
    return 1

It solves the problem of alternative 1 and 2, but the print keyword
would have problems if the function is called from an WEB or GUI
application and, because there are plans to convert print into a
function in py3k.


Alternative 4:
=============
def ExecuteSQL(cmdSQL, cursor):
    try:
        cursor.execute(cmdSQL)
    except Exception, e:
        print >> logerr, e.message
        return 0
    return 1

Seems a good solution but I should always be persuaded to have an open
global file (logerr) when invoking this function; otherwise code will
generate another error. The function is not totally independent.I think
I would be in the same situation when using the "logging" battery.

Thanks for your attention.

Regards,



From liam_jones at yahoo.com  Wed Jan 10 10:26:19 2007
From: liam_jones at yahoo.com (liam_jones at yahoo.com)
Date: 10 Jan 2007 07:26:19 -0800
Subject: Using Excel With Python
Message-ID: <1168442779.267439.222880@77g2000hsv.googlegroups.com>

I'm very new to Python, well IronPython to precise, and have been
having problems when using Excel.

The problem I'm having is the closing of my Excel object. I'm able to
successfully quit the Excel Application that I create, but when I open
a Workbook in the Application I can't successfully Quit Excel (by this
I mean I can quit it, but the Excel process isn't getting killed and I
have to manually go this through Task Manager).

I've given a sample of code below to hopefully make things clearer.
I've then given all of the information I think might be useful (sorry
if I've gone over the top!).


import System
import clr
from System.Data import *
from System.Web import *
from System.Web.UI import *
from clr import *

clr.AddReference("Microsoft.Office.Interop.Word")
clr.AddReference("Microsoft.Office.Interop.Excel")
clr.AddReference("Microsoft.Office.Interop.PowerPoint")
clr.AddReference("Office")

from Microsoft.Office.Interop.Word import ApplicationClass as
WordApplication
from Microsoft.Office.Interop.Excel import ApplicationClass as
ExcelApplication
from Microsoft.Office.Interop.PowerPoint import ApplicationClass as
PowerPointApplication
from Microsoft.Office.Interop.Word import WdReplace
from Microsoft.Office.Interop.Excel import XlCellType
from Microsoft.Office.Interop.Excel import XlSearchDirection
from System.Type import Missing
from System import GC

missing = Missing
FileLocation = "C:\\test.xls"

ExcelApp = ExcelApplication()
workbook= None

workbook = ExcelApp.Workbooks.Open(FileLocation, missing, missing,
missing, missing, missing, missing, missing, missing, missing, missing,

missing, missing, missing, missing)

workbook.Save()
workbook.Close(SaveChanges=0)

ExcelApp.Quit()

workbook = None
ExcelApp = None

GC.Collect()
GC.WaitForPendingFinalizers()


I've simpilised the code by taking all of my Workbook processing from
it and the problem is still occurring. As I said above if I don't
create the workbook, then ExcelApp closes as expected (there are no
stray processes).


I've read many articles and postings over the last few days regarding
this, but have had no luck with anything I've seen, examples of this
are now given.

I've tried adding the below code, but with no luck.

ExcelApp.ActiveWorkbook.Save()
ExcelApp.ActiveWorkbook.Close(SaveChanges=0)
ExcelApp.Workbooks.Close()

I've also tried the below (again with no luck).

System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook)
System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp)

And, I've also tried the following (again with no luck!).

del(workbook)
del(excelApp)

It may seem strange using the Garbage Collector (well I wouldn't have
thought about using it here), but it was something that I read about
using for code written in C#. I've tried the code in C# (what I
normally write in) and all works fine, the only real difference is that
I'm setting the objects to NULL in C# and None here in IronPython -
Does this make a difference, is there something else I should be
setting it to? The Workbook object HAS to be set to NULL in C#, it's
then picked up by the Garbage Collector and the task disappears from
the Task Manager.

I did think of killing the actual EXCEL.EXE process at the end of my
code, but there might be several versions of the containing application
running on the same box, so I can't kill all of the Excel processes.

As I said above, I'm sorry if I've gone over the top in my description.
Any ideas or pointers would be greatly appreciated as I'm now going
round in circles. 

Thanks in advance. 


Rgds 
Liam



From nagle at animats.com  Sat Jan 13 00:38:44 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 13 Jan 2007 05:38:44 GMT
Subject: More M2Crypto issues. Not big ones, though.
In-Reply-To: <3JGdnb2VxN7PsjXYnZ2dnUVZ_hydnZ2d@comcast.com>
References: <SrUph.33250$Gr2.12865@newssvr21.news.prodigy.net>
	<3JGdnb2VxN7PsjXYnZ2dnUVZ_hydnZ2d@comcast.com>
Message-ID: <Ef_ph.8439$ji1.6815@newssvr12.news.prodigy.net>

Heikki Toivonen wrote:
> John Nagle wrote:
> 
>>  A list of small problems and bugs in the current M2Crypto:
>>I need to look at SSL certificates in some detail, so this
>>is all about the access functions for certificates.
> 
> 
> Thanks, got the reports, will check them out.
> 
> 
>>    3. /M2Crypto/SSL/Connection.py:147:
>>    DeprecationWarning: Old style callback, use cb_func(ok, store)
>>    instead return m2.ssl_connect(self.ssl)
>>    (Also reported, in Polish, here:
>>http://www.mail-archive.com/pld-devel-pl at lists.pld-linux.org/msg12433.html)
>>    Entered into Bugzilla as #7718.
> 
> 
> This is actually intended. Once I figure out how to implement all the
> functionality in the new way I'd like to remove the old way.

    OK.	

>>    4. "close()" on an SSL socket that's just finished certificate
>>    negotiation hangs, at least on Windows.  
> 
> No known issues, but the ending of an SSL connection is a little grey
> area to me so I wouldn't be surprised if there are some cases where we
> shut down prematurely or too late. But I don't know why we'd hang.

    I'll check that again.
> 
> 
>>    1. X509.X509_name.__getattr__:
>>    Field retrieval from X.509 name items with x509_name_by_nid
>>    retrieves only first instance of field, not all instances.
> 
> Yes, I've been battling with this myself as well. OpenSSL provides
> objects to get things as a list, but they are so weird I haven't yet
> figured out a way to wrap them in Python so that you would actually be
> able to get some values out.

      I convert X509_name items to a list of tuples.  Here's an example:

	Server: [
		('CN', 'www.apartmentsapart.com'),
		('OU', 'Travel Services'),
		('O', 'Niche Travel Ltd.'),
		('L', 'Nicosia'),
		('ST', 'Nicosia'),
		('C', 'CY')]

That's straightforward.

But to do this I have to convert the X509_name item to a string, like this:

     subjectstr = subject.as_text(flags=(m2.XN_FLAG_RFC2253 | 
m2.ASN1_STRFLGS_UTF8_CONVERT) & ~m2.XN_FLAG_DUMP_UNKNOWN_FIELDS)

which yields a string of items like "L=Nicosia, OU=Travel Services", with
backslash escapes where necessary.  (The default formatting does not
have proper escaping; it's just for debug use.)  So I parse that,
obeying the escapes, and get out the tuples.  This works OK, but
shouldn't be necessary.  It's not something I need now, though.

Most things in X509 certificates map well to lists of tuples.

>>    2. Unclear if M2Crypto's X.509 interface is UTF-8 compatible.
>>    OpenSSL will return info in UTF-8 if you use the
>>    ASN1_STRFLGS_UTF8_CONVERT flag on as_text, but unclear if the
>>    M2 glue code handles this correctly.  Haven't found a UTF8 cert
>>    to test it on yet.
> 
> 
> Yeah, I am not convinced everything works as it should. Any UTF8 (and
> other encoding) samples would be welcome.

      Looking for one.  I think all that's needed is to recognize when
ASN1_STRFLGS_UTF8_CONVERT is set when converting to a Python string,
and convert to the appropriate form of Python string.

      Just rediscovered bug #5277, "Support certificates with multiple DNS 
names", which is fixed in 0.18.  Looking forward to version 0.18.
If you want to test that, try to open "https://www.autumngalleryforthehome.com".

					John Nagle



From fredrik at pythonware.com  Thu Jan  4 04:26:53 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 04 Jan 2007 10:26:53 +0100
Subject: pow() works but sqrt() not!?
In-Reply-To: <enig9a$cncb$1@zam602.zam.kfa-juelich.de>
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>	<1167899693.759071.51450@31g2000cwt.googlegroups.com>
	<enig9a$cncb$1@zam602.zam.kfa-juelich.de>
Message-ID: <enih8t$g2j$1@sea.gmane.org>

siggi wrote:

> What is a "namespace" and what is the difference between ">>>import math"
> and ">>>from math import *" ?

http://preview.tinyurl.com/t4pxq

for more on this, *please* read the relevant sections in the tutorial. 
Python's all about namespaces, and trial and error is not a very good 
way to figure how they work.

</F>



From chrolson at gmail.com  Fri Jan 19 18:55:23 2007
From: chrolson at gmail.com (chrolson at gmail.com)
Date: 19 Jan 2007 15:55:23 -0800
Subject: float comparison confusion
Message-ID: <1169250923.146916.206430@s34g2000cwa.googlegroups.com>

Type "help", "copyright", "credits" or "license" for more information.
>>> cmp(20.10, 20.9)
-1

Why is cmp returning -1 instead of returning positive integer?



From haisge at gmail.com  Mon Jan  8 05:37:31 2007
From: haisge at gmail.com (haisge)
Date: 8 Jan 2007 02:37:31 -0800
Subject: the free b2b website guide
Message-ID: <1168252651.295075.78890@i15g2000cwa.googlegroups.com>

the free b2b website guide

http://www.b2bbyte.com



From Eric_Dexter at msn.com  Wed Jan 24 18:43:01 2007
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 24 Jan 2007 15:43:01 -0800
Subject: ogl example question
Message-ID: <1169682181.743117.163600@a34g2000cwb.googlegroups.com>

    I know this might be the wrong place to ask but I recently modified
the ogl example from wxpython and it works fine in spe but when I call
it from other programs it wierds out because of the run.py thing they
have set it up with doesn't work when I call it from an external
program (including .bat files).   when I call it outside of spe I
manage to just get a box without the tracker part.  It is so close to
out right theft I was hopeing I could just tweek something to make it
work for me.  Any help would be apreciated (I am trying to call it with
tracker.py bay-at-night.csd )


#!/usr/bin/env python
#----------------------------------------------------------------------------
# Name:         run.py
# Purpose:      Simple framework for running individual demos
#
# Author:       Robin Dunn
#
# Created:      6-March-2000
# RCS-ID:       $Id: run.py,v 1.29.2.1 2006/01/26 00:33:39 RD Exp $
# Copyright:    (c) 2000 by Total Control Software
# Licence:      wxWindows license
#----------------------------------------------------------------------------

"""
This program will load and run one of the individual demos in this
directory within its own frame window.  Just specify the module name
on the command line.
"""

import wx                  # This module uses the new wx namespace
import sys, os

# stuff for debugging
print "wx.VERSION_STRING = %s (%s)" % (wx.VERSION_STRING,
wx.USE_UNICODE and 'unicode' or 'ansi')
print "pid:", os.getpid()
##raw_input("Press Enter...")

assertMode = wx.PYAPP_ASSERT_DIALOG
##assertMode = wx.PYAPP_ASSERT_EXCEPTION


#----------------------------------------------------------------------------

class Log:
    def WriteText(self, text):
        if text[-1:] == '\n':
            text = text[:-1]
        wx.LogMessage(text)
    write = WriteText


class RunDemoApp(wx.App):
    def __init__(self, name, module, useShell):
        self.name = name
        self.demoModule = module
        self.useShell = useShell
        wx.App.__init__(self, redirect=False)


    def OnInit(self):
        wx.Log_SetActiveTarget(wx.LogStderr())

        self.SetAssertMode(assertMode)

        frame = wx.Frame(None, -1, "RunDemo: " + self.name,
pos=(50,50), size=(200,100),
                        style=wx.DEFAULT_FRAME_STYLE)
        frame.CreateStatusBar()

        menuBar = wx.MenuBar()
        menu = wx.Menu()
        item = menu.Append(-1, "E&xit\tAlt-X", "Exit demo")
        self.Bind(wx.EVT_MENU, self.OnExitApp, item)
        menuBar.Append(menu, "&File")

        ns = {}
        ns['wx'] = wx
        ns['app'] = self
        ns['module'] = self.demoModule
        ns['frame'] = frame

        frame.SetMenuBar(menuBar)
        frame.Show(True)
        frame.Bind(wx.EVT_CLOSE, self.OnCloseFrame)

        win = self.demoModule.runTest(frame, frame, Log())

        # a window will be returned if the demo does not create
        # its own top-level window
        if win:
            # so set the frame to a good size for showing stuff
            frame.SetSize((640, 480))
            win.SetFocus()
            self.window = win
            ns['win'] = win
            frect = frame.GetRect()

        else:
            # It was probably a dialog or something that is already
            # gone, so we're done.
            frame.Destroy()
            return True

        self.SetTopWindow(frame)
        self.frame = frame
        #wx.Log_SetActiveTarget(wx.LogStderr())
        #wx.Log_SetTraceMask(wx.TraceMessages)

        if self.useShell:
            # Make a PyShell window, and position it below our test
window
            from wx import py
            shell = py.shell.ShellFrame(None, locals=ns)
            frect.OffsetXY(0, frect.height)
            frect.height = 400
            shell.SetRect(frect)
            shell.Show()

            # Hook the close event of the test window so that we close
            # the shell at the same time
            def CloseShell(evt):
                if shell:
                    shell.Close()
                evt.Skip()
            frame.Bind(wx.EVT_CLOSE, CloseShell)

        return True


    def OnExitApp(self, evt):
        self.frame.Close(True)


    def OnCloseFrame(self, evt):
        if hasattr(self, "window") and hasattr(self.window,
"ShutdownDemo"):
            self.window.ShutdownDemo()
        evt.Skip()


#----------------------------------------------------------------------------


def main(argv):
    useShell = False
    for x in range(len(sys.argv)):
        if sys.argv[x] in ['--shell', '-shell', '-s']:
            useShell = True
            del sys.argv[x]
            break

    if len(argv) < 2:
        print "Please specify a demo module name on the command-line"
        raise SystemExit

    name, ext  = os.path.splitext(argv[1])
    module = __import__(name)


    app = RunDemoApp(name, module, useShell)
    app.MainLoop()



if __name__ == "__main__":
    main(sys.argv)







# -*- coding: iso-8859-1 -*-
# 11/20/2003 - Jeff Grimmett (grimmtooth at softhome.net)
#
# o Updated for wx namespace
#
# 20040508 - Pierre Hj?lm
#
# o Changed to use the python version of OGL
# o Added TextShape, CompositeShape and CompositeShape with divisions
#
# 20040830 - Pierre Hj?lm
#
# o Added DrawnShape
#

import wx
import wx.lib.ogl as ogl
import csoundroutines
import sys

#import  images

#----------------------------------------------------------------------

class DrawnShape(ogl.DrawnShape):
    def __init__(self):
        ogl.DrawnShape.__init__(self)

        self.SetDrawnBrush(wx.WHITE_BRUSH)
        self.SetDrawnPen(wx.BLACK_PEN)
        self.DrawArc((0, -10), (30, 0), (-30, 0))

        self.SetDrawnPen(wx.Pen("#ff8030"))
        self.DrawLine((-30, 5), (30, 5))

        self.SetDrawnPen(wx.Pen("#00ee10"))
        self.DrawRoundedRectangle((-20, 10, 40, 10), 5)

        self.SetDrawnPen(wx.Pen("#9090f0"))
        self.DrawEllipse((-30, 25, 60, 20))

        self.SetDrawnTextColour(wx.BLACK)
        self.SetDrawnFont(wx.Font(8, wx.SWISS, wx.NORMAL, wx.NORMAL))
        self.DrawText("DrawText", (-26, 28))

        self.SetDrawnBrush(wx.GREEN_BRUSH)
        self.DrawPolygon([(-100, 5), (-45, 30), (-35, 20), (-30, 5)])

        self.SetDrawnPen(wx.BLACK_PEN)
        self.DrawLines([(30, -45), (40, -45), (40 ,45), (30, 45)])

        # Make sure to call CalculateSize when all drawing is done
        self.CalculateSize()

#----------------------------------------------------------------------

class DiamondShape(ogl.PolygonShape):
    def __init__(self, w=0.0, h=0.0):
        ogl.PolygonShape.__init__(self)
        if w == 0.0:
            w = 60.0
        if h == 0.0:
            h = 60.0

        points = [ (0.0,    -h/2.0),
                   (w/2.0,  0.0),
                   (0.0,    h/2.0),
                   (-w/2.0, 0.0),
                   ]

        self.Create(points)


#----------------------------------------------------------------------
class TrackerRectangle(ogl.RectangleShape):
    def __init__(self, w=0.0, h = 0.0):
      ogl.RectangleShape.__init__(self, w, h)
      #self.TextShape(text)

class RoundedRectangleShape(ogl.RectangleShape):
    def __init__(self, w=0.0, h=0.0):
        ogl.RectangleShape.__init__(self, w, h)
        self.SetCornerRadius(-0.3)


#----------------------------------------------------------------------

class CompositeDivisionShape(ogl.CompositeShape):
    def __init__(self, canvas):
        ogl.CompositeShape.__init__(self)

        self.SetCanvas(canvas)

        # create a division in the composite
        self.MakeContainer()

        # add a shape to the original division
        shape2 = ogl.RectangleShape(40, 60)
        self.GetDivisions()[0].AddChild(shape2)

        # now divide the division so we get 2
        self.GetDivisions()[0].Divide(wx.HORIZONTAL)

        # and add a shape to the second division (and move it to the
        # centre of the division)
        shape3 = ogl.CircleShape(40)
        shape3.SetBrush(wx.CYAN_BRUSH)
        self.GetDivisions()[1].AddChild(shape3)
        shape3.SetX(self.GetDivisions()[1].GetX())

        for division in self.GetDivisions():
            division.SetSensitivityFilter(0)

#----------------------------------------------------------------------

class CompositeShape(ogl.CompositeShape):
    def __init__(self, canvas):
        ogl.CompositeShape.__init__(self)

        self.SetCanvas(canvas)

        constraining_shape = ogl.RectangleShape(120, 100)
        constrained_shape1 = ogl.CircleShape(50)
        constrained_shape2 = ogl.RectangleShape(80, 20)

        constraining_shape.SetBrush(wx.BLUE_BRUSH)
        constrained_shape2.SetBrush(wx.RED_BRUSH)

        self.AddChild(constraining_shape)
        self.AddChild(constrained_shape1)
        self.AddChild(constrained_shape2)

        constraint = ogl.Constraint(ogl.CONSTRAINT_MIDALIGNED_BOTTOM,
constraining_shape, [constrained_shape1, constrained_shape2])
        self.AddConstraint(constraint)
        self.Recompute()

        # If we don't do this, the shapes will be able to move on their
        # own, instead of moving the composite
        constraining_shape.SetDraggable(False)
        constrained_shape1.SetDraggable(False)
        constrained_shape2.SetDraggable(False)

        # If we don't do this the shape will take all left-clicks for
itself
        constraining_shape.SetSensitivityFilter(0)


#----------------------------------------------------------------------

class DividedShape(ogl.DividedShape):
    def __init__(self, width, height, canvas):
        ogl.DividedShape.__init__(self, width, height)

        region1 = ogl.ShapeRegion()
        region1.SetText('DividedShape')
        region1.SetProportions(0.0, 0.2)
        region1.SetFormatMode(ogl.FORMAT_CENTRE_HORIZ)
        self.AddRegion(region1)

        region2 = ogl.ShapeRegion()
        region2.SetText('This is Region number two.')
        region2.SetProportions(0.0, 0.3)

region2.SetFormatMode(ogl.FORMAT_CENTRE_HORIZ|ogl.FORMAT_CENTRE_VERT)
        self.AddRegion(region2)

        region3 = ogl.ShapeRegion()
        region3.SetText('Region 3\nwith embedded\nline breaks')
        region3.SetProportions(0.0, 0.5)
        region3.SetFormatMode(ogl.FORMAT_NONE)
        self.AddRegion(region3)

        self.SetRegionSizes()
        self.ReformatRegions(canvas)


    def ReformatRegions(self, canvas=None):
        rnum = 0

        if canvas is None:
            canvas = self.GetCanvas()

        dc = wx.ClientDC(canvas)  # used for measuring

        for region in self.GetRegions():
            text = region.GetText()
            self.FormatText(dc, text, rnum)
            rnum += 1


    def OnSizingEndDragLeft(self, pt, x, y, keys, attch):
        print "***", self
        ogl.DividedShape.OnSizingEndDragLeft(self, pt, x, y, keys,
attch)
        self.SetRegionSizes()
        self.ReformatRegions()
        self.GetCanvas().Refresh()


#----------------------------------------------------------------------

class MyEvtHandler(ogl.ShapeEvtHandler):
    def __init__(self, log, frame):
        ogl.ShapeEvtHandler.__init__(self)
        self.log = log
        self.statbarFrame = frame

    def UpdateStatusBar(self, shape):
        x, y = shape.GetX(), shape.GetY()
        width, height = shape.GetBoundingBoxMax()
        self.statbarFrame.SetStatusText("Pos: (%d, %d)  Size: (%d, %d)"
%
                                        (x, y, width, height))


    def OnLeftClick(self, x, y, keys=0, attachment=0):
        shape = self.GetShape()
        canvas = shape.GetCanvas()
        dc = wx.ClientDC(canvas)
        canvas.PrepareDC(dc)

        if shape.Selected():
            shape.Select(False, dc)
            canvas.Redraw(dc)
        else:
            redraw = False
            shapeList = canvas.GetDiagram().GetShapeList()
            toUnselect = []

            for s in shapeList:
                if s.Selected():
                    # If we unselect it now then some of the objects in
                    # shapeList will become invalid (the control points
are
                    # shapes too!) and bad things will happen...
                    toUnselect.append(s)

            shape.Select(True, dc)

            if toUnselect:
                for s in toUnselect:
                    s.Select(False, dc)

                canvas.Redraw(dc)

        self.UpdateStatusBar(shape)


    def OnEndDragLeft(self, x, y, keys=0, attachment=0):
        shape = self.GetShape()
        ogl.ShapeEvtHandler.OnEndDragLeft(self, x, y, keys, attachment)

        if not shape.Selected():
            self.OnLeftClick(x, y, keys, attachment)

        self.UpdateStatusBar(shape)


    def OnSizingEndDragLeft(self, pt, x, y, keys, attch):
        ogl.ShapeEvtHandler.OnSizingEndDragLeft(self, pt, x, y, keys,
attch)
        self.UpdateStatusBar(self.GetShape())


    def OnMovePost(self, dc, x, y, oldX, oldY, display):
        ogl.ShapeEvtHandler.OnMovePost(self, dc, x, y, oldX, oldY,
display)
        self.UpdateStatusBar(self.GetShape())


    def OnRightClick(self, *dontcare):
        self.log.WriteText("%s\n" % self.GetShape())


#----------------------------------------------------------------------

class TestWindow(ogl.ShapeCanvas):
    def __init__(self, parent, log, frame):
        ogl.ShapeCanvas.__init__(self, parent)

        maxWidth  = 1000
        maxHeight = 1000
        self.SetScrollbars(20, 20, maxWidth/20, maxHeight/20)

        self.log = log
        self.frame = frame
        self.SetBackgroundColour("LIGHT BLUE") #wx.WHITE)
        self.diagram = ogl.Diagram()
        self.SetDiagram(self.diagram)
        self.diagram.SetCanvas(self)
        self.shapes = []
        self.save_gdi = []

        rRectBrush = wx.Brush("MEDIUM TURQUOISE", wx.SOLID)
        dsBrush = wx.Brush("WHEAT", wx.SOLID)

        #self.MyAddShape(
         #   CompositeDivisionShape(self),
        #    270, 310, wx.BLACK_PEN, wx.BLUE_BRUSH, "Division"
        #    )

        #self.MyAddShape(
        #    CompositeShape(self),
        #    100, 260, wx.BLACK_PEN, wx.RED_BRUSH, "Composite"
         #   )

        #self.MyAddShape(
         #   ogl.CircleShape(80),
         #   75, 110, wx.Pen(wx.BLUE, 3), wx.GREEN_BRUSH, "Circle"
         #   )

        #self.MyAddShape(
        #    ogl.TextShape(120, 45),
        #    160, 35, wx.GREEN_PEN, wx.LIGHT_GREY_BRUSH, "OGL is now
a\npure Python lib!"
        #    )

        #self.MyAddShape(
        #    ogl.RectangleShape(85, 50),
         #   305, 60, wx.BLACK_PEN, wx.LIGHT_GREY_BRUSH, "Rectangle"
         #   )

        #self.MyAddShape(
         #   DrawnShape(),
         #   500, 80, wx.BLACK_PEN, wx.BLACK_BRUSH, "DrawnShape"
         #   )

        #ds = self.MyAddShape(
         #   DividedShape(140, 150, self),
         #   520, 265, wx.BLACK_PEN, dsBrush, ''
         #   )

        #self.MyAddShape(
        #    DiamondShape(90, 90),
        #    355, 260, wx.Pen(wx.BLUE, 3, wx.DOT), wx.RED_BRUSH,
"Polygon"
        #    )

        #self.MyAddShape(
         #   RoundedRectangleShape(95, 70),
        #    345, 145, wx.Pen(wx.RED, 2), rRectBrush, "Rounded Rect"
        #    )

        instr = csoundroutines.csdInstrumentList2(sys.argv[1])
        connections = csoundroutines.return_pins2(sys.argv[1])
        shape = []

        for i in range(0, len(instr.instrnum)):
                #shape[i] = ogl.RectangleShape(80, 30)
                #shape[i].AddText(instr.comments[i])
                #canvas.AddShape( shape[i] )
                #shape[i].SetX( 25.0 )                         #
                #shape[i].SetY( 25.0 )
                self.MyAddShape(
                   TrackerRectangle(70,30),
                   25, 25, wx.Pen(wx.RED, 2),rRectBrush,
instr.comments[i]
                   )
        dc = wx.ClientDC(self)
        self.PrepareDC(dc)
        print 'is here'

        line = {}
        x1 = {}
        y1 = {}
        x2 = {}
        y2 = {}

        for i in range(0, len(instr.instrnum)):
                  if connections.instr_output[i] != 0:
       #check for an output
                    for n in range(0,len(instr.comments)):
     #iterate through names
                     print(connections.instr_number[i],
int(instr.instrnum[n]))
                     if connections.instr_number[i] ==
int(instr.instrnum[n]): #check for a match
                           x1[i] = self.shapes[i].GetX #
                           y1[i] = self.shapes[i].GetY

                           print instr.instrnum
                           print 'instr num'
                           print i
                           print 'iterator'
                           #outstring = instr.comments[n] + ' -> '
     #grab the name
                     for o in range(0, len(connections.instr_number)):
  #iterate through connections
                       #print(o, outstring)
                         if connections.instr_output[i] ==
connections.instr_input[o]: #check for pin match
                           for n2 in range(0,len(instr.comments)):
         #iterate through connections
                               if connections.instr_number[o] ==
int(instr.instrnum[n2]): #match names
                                  x2 = self.shapes[n2].GetX
                                  y2 = self.shapes[n2].GetY

                  fromShape = self.shapes[i]
                  toShape = self.shapes[n2]
                  line = ogl.LineShape()
                  line.SetCanvas(self)
                  line.SetPen(wx.BLACK_PEN)
                  line.SetBrush(wx.BLACK_BRUSH)
                  line.AddArrow(ogl.ARROW_ARROW)
                  line.MakeLineControlPoints(2)
                  fromShape.AddLine(line, toShape)
                    #fromShape.AddLine(line, toShape)
                  self.diagram.AddShape(line)
                  line.Show(True)
                    #shape[i].AddLine(line[o], shape[n2])


                  #line[o] = ogl.LineShape()
                  #line[o].SetCanvas(self)
                  #line[o].MakeLineControlPoints(2)
        # S

    def MyAddShape(self, shape, x, y, pen, brush, text):
        # Composites have to be moved for all children to get in place
        if isinstance(shape, ogl.CompositeShape):
            dc = wx.ClientDC(self)
            self.PrepareDC(dc)
            shape.Move(dc, x, y)
        else:
            shape.SetDraggable(True, True)
        shape.SetCanvas(self)
        shape.SetX(x)
        shape.SetY(y)
        if pen:    shape.SetPen(pen)
        if brush:  shape.SetBrush(brush)
        if text:
            for line in text.split('\n'):
                shape.AddText(line)
        #shape.SetShadowMode(ogl.SHADOW_RIGHT)
        self.diagram.AddShape(shape)
        shape.Show(True)

        evthandler = MyEvtHandler(self.log, self.frame)
        evthandler.SetShape(shape)
        evthandler.SetPreviousHandler(shape.GetEventHandler())
        shape.SetEventHandler(evthandler)

        self.shapes.append(shape)
        return shape


    def OnBeginDragLeft(self, x, y, keys):
        self.log.write("OnBeginDragLeft: %s, %s, %s\n" % (x, y, keys))

    def OnEndDragLeft(self, x, y, keys):
        self.log.write("OnEndDragLeft: %s, %s, %s\n" % (x, y, keys))


#----------------------------------------------------------------------

def runTest(frame, nb, log):
    # This creates some pens and brushes that the OGL library uses.
    # It should be called after the app object has been created, but
    # before OGL is used.
    ogl.OGLInitialize()

    win = TestWindow(nb, log, frame)
    return win

#----------------------------------------------------------------------


overview = """<html><body>
<h2>Object Graphics Library</h2>

The Object Graphics Library is a library supporting the creation and
manipulation of simple and complex graphic images on a canvas.

<p>The OGL library was originally written in C++ and provided to
wxPython via an extension module wrapper as is most of the rest of
wxPython.  The code has now been ported to Python (with many thanks to
Pierre Hj?lm!) in order to make it be more easily maintainable and
less likely to get rusty because nobody cares about the C++ lib any
more.

<p>The Python version should be mostly drop-in compatible with the
wrapped C++ version, except for the location of the package
(wx.lib.ogl instead of wx.ogl) and that the base class methods are
called the normal Python way (superclass.Method(self, ...)) instead of
the
hacky way that had to be done to support overloaded methods with the
old SWIG (self.base_Method(...))


"""
def main2(programname, filename):
    import sys, os
    import run
    run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])


if __name__ == '__main__':
    import sys, os
    import run
    run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])



From tiedon_jano at hotmail.com  Sun Jan  7 04:25:48 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Sun, 07 Jan 2007 09:25:48 GMT
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <fK_nh.25689$QU1.17301@newssvr22.news.prodigy.net>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>	<mailman.2332.1168016502.32031.python-list@python.org>	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>	<yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>
	<mailman.2367.1168100759.32031.python-list@python.org>
	<fK_nh.25689$QU1.17301@newssvr22.news.prodigy.net>
Message-ID: <w03oh.46$_k2.22@read3.inet.fi>

W. Watson kirjoitti:
> Thomas Ploch wrote:
<snip>

>> https://sourceforge.net/projects/pywin32/
>>
>> I think this is the place to go
>>
>> Thomas
>>
>>
> That gets me the python program (pywin), which I got from a URL in a 
> post above (python-win.msi). I guess these are the same or at least just 
> the interpreter, and do not provide the IDE-debugger. I can't get 
> pythonwin, the debugger and IDE. The link was broken last night when I 
> tried it. Well, let me try now. Nope, it still reports "Error 404: File 
> Not Found"


I don't understand your difficulties. If you've got Python installed and 
want to install the "Python for Windows extensions" aka pywin32, the 
above link is the way to go.

Clicking it gets you to a Sourceforge page, where you can click 
"download" which gets you to ap page where you can choose which version 
of pywin32 build 210 you want. Choose the exe that was built for the 
Python version (e.g. 2.5) you are using, download and run it to install 
pywin32.

HTH,
Jussi


From duncan.booth at invalid.invalid  Mon Jan  8 05:37:48 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Jan 2007 10:37:48 GMT
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
	<7xd55rzke9.fsf@ruckus.brouhaha.com>
	<slrneq2055.tcj.grahn+nntp@frailea.sa.invalid>
	<mailman.2388.1168181437.32031.python-list@python.org>
	<7x3b6mzwkl.fsf@ruckus.brouhaha.com>
	<1168189375.843789.306180@51g2000cwl.googlegroups.com>
	<7xps9q19wf.fsf@ruckus.brouhaha.com>
	<1168248244.134804.138050@51g2000cwl.googlegroups.com>
Message-ID: <Xns98B26C21E7650duncanbooth@127.0.0.1>

"Paul Boddie" <paul at boddie.org.uk> wrote:

> Paul Rubin wrote:
>>
>> Right, the problem is if those methods start changing the "private"
>> variable.  I should have been more explicit about that.
>>
>> class A:
>>    def __init__(self):
>>       self.__x = 3
>>    def foo(self):
>>       return self.__x
>>
>> class B(A): pass
>>
>> class A(B):
>>    def bar(self):
>>      self.__x = 5   # clobbers private variable of earlier class named A
> 
> Has this ever been reported as a bug in Python? I could imagine more
> sophisticated "name mangling": something to do with the identity of the
> class might be sufficient, although that would make the tolerated
> "subversive" access to private attributes rather difficult.
> 
> Paul
> 
If it worries you then you can always check for it and disallow any 
hierarchies where it could be a problem. For that matter PyChecker ought to 
be able to catch this situation (maybe it already does, I haven't looked).

>>> class SafetyNet(type):
	def __new__(cls, name, bases, dct):
		print "new",name
		c = type.__new__(cls, name, bases, dct)
		assert not name in [b.__name__ for b in c.__mro__[1:]]
		return c

	
>>> __metaclass__ = SafetyNet
>>> class A: pass

new A
>>> class B(A): pass

new B
>>> class A(B): pass

new A

Traceback (most recent call last):
  File "<pyshell#24>", line 1, in <module>
    class A(B): pass
  File "<pyshell#17>", line 5, in __new__
    assert not name in [b.__name__ for b in c.__mro__[1:]]
AssertionError



From vpolukcht at gmail.com  Tue Jan 16 09:44:35 2007
From: vpolukcht at gmail.com (Victor Polukcht)
Date: 16 Jan 2007 06:44:35 -0800
Subject: Regular expressions question
In-Reply-To: <slrneqpp4e.r8.horpner@FIAD06.norwich.edu>
References: <1168947810.175793.228620@51g2000cwl.googlegroups.com>
	<Xns98BA7A00DDBC0duncanbooth@127.0.0.1>
	<1168957361.204348.30080@s34g2000cwa.googlegroups.com>
	<slrneqpp4e.r8.horpner@FIAD06.norwich.edu>
Message-ID: <1168958674.976563.91260@l53g2000cwa.googlegroups.com>

The same regular expression should work for another string (with *200).

On Jan 16, 5:40 pm, Neil Cerutti <horp... at yahoo.com> wrote:
> On 2007-01-16, Victor Polukcht <vpoluk... at gmail.com> wrote:
>
> > Actually, i'm trying to get the values of first field (Global) , fourth
> > (200, 4), and fifth (100%) and sixth (100%).
>
> > Everything except fourth is simple.
> >>> g = "Global             etsi3  *   4 ok     30 100% 100% Outgoing"
> >>> import re
> >>> r = re.search('\*\s+(\d+)', g)
> >>> r.group()
> '*   4'
> >>> r.group(1)'4'
>
> --
> Neil Cerutti
> We're not afraid of challenges. It's like we always say: If you want to go out
> in the rain, be prepared to get burned. --Brazillian soccer player



From matt at tplus1.com  Thu Jan 25 11:54:05 2007
From: matt at tplus1.com (Matthew Wilson)
Date: Thu, 25 Jan 2007 16:54:05 GMT
Subject: assertions to validate function parameters
Message-ID: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>

Lately, I've been writing functions like this:

def f(a, b):

    assert a in [1, 2, 3]
    assert b in [4, 5, 6]

The point is that I'm checking the type and the values of the
parameters.

I'm curious how this does or doesn't fit into python's duck-typing
philosophy.

I find that when I detect invalid parameters overtly, I spend less time
debugging.

Are other people doing things like this?  Any related commentary is
welcome.

Matt

-- 
A better way of running series of SAS programs:
http://overlook.homelinux.net/wilsonwiki/SasAndMakefiles


From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 19 14:06:45 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 20 Jan 2007 06:06:45 +1100
Subject: when format strings attack
References: <1169207467.989977.162940@q2g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.19.19.06.43.598000@REMOVE.THIS.cybersource.com.au>

On Fri, 19 Jan 2007 03:51:08 -0800, Eric_Dexter at msn.com wrote:

> http://www.ddj.com/184405774;jsessionid=BDDEMUGJOPXUMQSNDLQCKHSCJUNN2JVN
> 
> I saw a warning from homeland security about this.  I only comment on
> the because I am trying to use os.system('command1 arg') and it doesn't
> work 

What do you mean, doesn't work? It works fine for me, precisely as
expected. What does it do for you? Crash Windows? Crash Python? Raise an
exception? Return an unexpected result?

> but I do see examples with % that is borrowed from the c language.

The "When Format Strings Attack" article isn't relevant to Python. Unlike
C, Python doesn't arbitrary dump bytes from the stack into a string if you
print a string containing %s. In Python, print just prints strings, it
doesn't do any string formatting. String formatting is done by the %
operator, so print "a string containing %s" is safe.

You'd be better off looking at Python examples than C. This is what I'm
guessing you're doing:

>>> command1 = 'dir'
>>> args = '-l text.txt'
>>> os.system('command1 arg')
sh: command1: command not found
32512

os.system doesn't do name-lookups of the string you pass to it. The right
way to do this is some variation on this:

>>> commandline = "%s %s" % (command1, args)
>>> commandline
'dir -l text.txt'
>>> os.system(commandline)
-rw-rw-r-- 1 steve steve 333 Sep 24 16:51 text.txt
0

or even something like this:

os.system('dir -l %s' % 'text.txt')


Now, there is a security risk: you might set command1 yourself, and
allow the user to set args. If command1 is an external application
with a security hole, and the user provides arguments that trigger that
bug, then naturally your application will inherit whatever security
vulnerabilities the external application suffers from. No surprises there.


-- 
Steven.



From horpner at yahoo.com  Fri Jan 26 15:25:28 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 26 Jan 2007 20:25:28 GMT
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
	<45ba50c7$0$31432$426a74cc@news.free.fr>
Message-ID: <slrnerks72.jc.horpner@FIAD06.norwich.edu>

On 2007-01-26, Fabrice DELENTE <fdelente at mail.cpod.fr> wrote:
>> What have you tried?
>
> I've tried
>
> stdscr.addstr(0,0,"a??o?")
>
> or
>
> stdscr.addstr(0,0,"le?on")
>
> The ASCII chars show correctly, but the accented characters
> don't, so I see 'ao' or 'leon' on the screen.
>
> The term in which I display is 8-bit-able, so the problem is
> either on ncurses side, or on python side.

What happens when you try this?

stdscr.addstr(0,0, u"le?on".encode('iso8859-15'))

I don't really expect it to work, but if anything will, that is
it. Curses supports only ASCII and a some special symbol codes
defined by curses.

> I have
>
> #!/usr/local/bin/python
> #coding: iso8859-15

Be sure to write your non-ASCII strings as unicode literals, and
then encode them just before displaying or storing them
somewhere.

-- 
Neil Cerutti

-- 
Posted via a free Usenet account from http://www.teranews.com



From duncan.booth at invalid.invalid  Tue Jan 16 07:05:16 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 Jan 2007 12:05:16 GMT
Subject: How to convert float to sortable integer in Python
References: <1168939312.223194.184770@l53g2000cwa.googlegroups.com>
	<eoid8h$bnn$1@news.albasani.net>
Message-ID: <Xns98BA7AF83B872duncanbooth@127.0.0.1>

robert <no-spam at no-spam-no-spam.invalid> wrote:

> shellon wrote:
>> Hi all:
>>     I want to convert the float number to sortable integer, like the
>> function float2rawInt() in java, but I don't know the internal
>> expression of float, appreciate your help!
>> 
> 
> float comparision works well enough for sorting in Python. What is 
> the actual requirement?
> 

Maybe this is the problem?

>>> sorted([-0.0, 0.0, -0.0, 0.0, -0.0])
[-0.0, 0.0, -0.0, 0.0, -0.0]

Java sorting imposes an artificial total ordering on float or double 
values:

> The < relation does not provide a total order on all floating-point
> values; although they are distinct numbers -0.0 == 0.0 is true and a
> NaN value compares neither less than, greater than, nor equal to any
> floating-point value, even itself. To allow the sort to proceed,
> instead of using the < relation to determine ascending numerical
> order, this method uses the total order imposed by
> Double.compareTo(java.lang.Double). This ordering differs from the <
> relation in that -0.0 is treated as less than 0.0 and NaN is
> considered greater than any other floating-point value. For the
> purposes of sorting, all NaN values are considered equivalent and
> equal. 


From nmm1 at cus.cam.ac.uk  Thu Jan 11 05:37:20 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 11 Jan 2007 10:37:20 GMT
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<1168452879.866265.36880@i39g2000hsf.googlegroups.com>
	<eo3bgm$c98$1@gemini.csx.cam.ac.uk>
	<mailman.2544.1168455985.32031.python-list@python.org>
	<eo3eqs$icv$1@gemini.csx.cam.ac.uk>
	<mailman.2569.1168510933.32031.py
Message-ID: <eo5410$19v$1@gemini.csx.cam.ac.uk>


In article <mailman.2569.1168510933.32031.python-list at python.org>,
Sergei Organov <osv at javad.com> writes:
|> 
|> OK, then I don't think the POSIX threads were "perpetrated" to be idle
|> most of time.

Perhaps I was being unclear.  I should have added "In the case where
there are more threads per system than CPUs per system".  The reasons
are extremely obscure and are to do with the scheduling, memory access
and communication.

I am in full agreement that the above effect was not INTENDED.

|> > That is why many POSIX threads programs work until the genuinely
|> > shared memory accesses become frequent enough that you get some to the
|> > same location in a single machine cycle.
|> 
|> Sorry, I don't understand. Are you saying that it's inherently
|> impossible to write an application that uses POSIX threads and that
|> doesn't have bugs accessing shared state? I thought that pthreads
|> mutexes guarantee sequential access to shared data. Or do you mean
|> something entirely different? Lock-free algorithms maybe?

I mean precisely the first.

The C99 standard uses a bizarre consistency model, which requires serial
execution, and its consistency is defined in terms of only volatile
objects and external I/O.  Any form of memory access, signalling or
whatever is outside that, and is undefined behaviour.

POSIX uses a different but equally bizarre one, based on some function
calls being "thread-safe" and others forcing "consistency" (which is
not actually defined, and there are many possible, incompatible,
interpretations).  It leaves all language aspects (including allowed
code movement) to C.

There are no concepts in common between C's and POSIX's consistency
specifications (even when they are precise enough to use), and so no
way of mapping the two standards together.


Regards,
Nick Maclaren.


From calfdog at yahoo.com  Wed Jan 31 16:46:07 2007
From: calfdog at yahoo.com (calfdog at yahoo.com)
Date: 31 Jan 2007 13:46:07 -0800
Subject: Python tools to manipulate JARs ?
In-Reply-To: <mailman.3362.1170269424.32031.python-list@python.org>
References: <1170259882.613769.118210@v45g2000cwv.googlegroups.com>
	<mailman.3362.1170269424.32031.python-list@python.org>
Message-ID: <1170279967.794312.42990@j27g2000cwj.googlegroups.com>

On Jan 31, 1:50 pm, Laszlo Nagy <gand... at designaproduct.biz> wrote:
> Andy Dingley ?rta:> I run build processes for a Java shop using Python (and some Ant).
>
> > Would anyone care to suggest favoured tools for manipulating the
> > innards of JARs? Or do I just treat them as plain zipfiles and get
> > stuck right in there?
>
> > Mainly I'm trying to query lists of classes and their embedded
> > versions and do some library dependency reporting. Performance speed
> > is starting to be an issue, as there's 1500+ classes in this bucket
> > and it's an interactive query.
>
> I believe that you can rename any jar file to .zip and use zip tools to
> list its contents.
>
>    Laszlo


To print out the classes you can use zipfile
it will list the contents of a jar file also


import zipfile

zf = zipfile.ZipFile("some.jar")

for info in zf.infolist():
    print  info.filename

Or print to a file

import zipfile

zf = zipfile.ZipFile("some.jar")

for info in zf.infolist():
    classes = info.filename
    myfile = file("classes.txt", 'w')
    print >> myfile, classes


Enjoy
-Rob Marchetti



From weekender_ny at yahoo.com  Sat Jan 13 23:54:47 2007
From: weekender_ny at yahoo.com (John)
Date: 13 Jan 2007 20:54:47 -0800
Subject: Threaded for loop
In-Reply-To: <1168747208.275625.55590@51g2000cwl.googlegroups.com>
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
	<1168747208.275625.55590@51g2000cwl.googlegroups.com>
Message-ID: <1168750487.337511.213600@38g2000cwa.googlegroups.com>



Thanks. Does it matter if I call shell commands os.system...etc in
calculate?

Thanks,
--j

parallelpython at gmail.com wrote:
> John wrote:
> > I want to do something like this:
> >
> > for i = 1 in range(0,N):
> >  for j = 1 in range(0,N):
> >    D[i][j] = calculate(i,j)
> >
> > I would like to now do this using a fixed number of threads, say 10
> > threads.
> > What is the easiest way to do the "parfor" in python?
> >
> > Thanks in advance for your help,
>
> As it was already mentioned before threads will not help in terms of
> parallelism (only one thread will be actually working). If you want to
> calculate this in parallel here is an easy solution:
>
> import ppsmp
>
> #start with 10 processes
> srv = ppsmp.Server(10)
>
> f = []
>
> for i = 1 in range(0,N):
>   for j = 1 in range(0,N):
>       #it might be a little bit more complex if 'calculate' depends on
> other modules or calls functions
>       f.append(srv.submit(calculate, (i,j)))
>
> for i = 1 in range(0,N):
>   for j = 1 in range(0,N):
>      D[i][j] = f.pop(0)
>
> You can get the latest version of ppsmp module here:
> http://www.parallelpython.com/



From hg at nospam.org  Mon Jan 15 03:42:19 2007
From: hg at nospam.org (hg)
Date: Mon, 15 Jan 2007 09:42:19 +0100
Subject: check if there is data in stdin without blocking
References: <4PMqh.47441$X97.9536@newsfe18.lga>
Message-ID: <uhNqh.47996$X97.358@newsfe18.lga>

hg wrote:

> Hi,
> 
> Is there a way ? ... select ?
> 
> 
> 
> hg
PS:

import sys
import select

l_r = select.select([sys.stdin],[],[],0)

gives me:
  File "select.py", line 2, in ?
    import select
  File "/home/philippe/Desktop/select.py", line 4, in ?
    l_r = select.select([sys.stdin],[],[],0)
TypeError: 'module' object is not callable




From scott.daniels at acm.org  Sun Jan  7 22:50:16 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 07 Jan 2007 19:50:16 -0800
Subject: how to find the longst element list of lists
In-Reply-To: <m2mz4ul1tk.fsf@unique.fqdn>
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
	<m2mz4ul1tk.fsf@unique.fqdn>
Message-ID: <45a1b4da$1@nntp0.pdx.net>

Dan Sommers wrote:
> ...
>     longest_list, longest_length = list_of_lists[ 0 ], len( longest_list )
>     for a_list in list_of_lists[ 1 : ]:
>         a_length = len( a_list )
>         if a_length > longest_length:
>             longest_list, longest_length = a_list, a_length
> will run faster than sorting the list just to pick off one element (O(n)
> vs. O(n log n) for all of you Big-Oh notation fans out there; you know
> who you are!).

Or, more succinctly, after:
     list_of_lists = [["q", "e", "d"],
                      ["a", "b"],
                      ["a", "b", "c", "d"]]
You can find the longest with:
     maxlength, maxlist = max((len(lst), lst) for lst in list_of_lists)
or (for those pre-2.5 people):
     maxlength, maxlist = max([(len(lst), lst) for lst in list_of_lists])

--Scott David Daniels
scott.daniels at acm.org


From nospam at nospam.com  Tue Jan 30 20:48:45 2007
From: nospam at nospam.com (soutjhyDin)
Date: Tue, 30 Jan 2007 19:48:45 -0600
Subject: BYU Physics Prof Finds Thermate in WTC Physical Samples,
	Building Collapses an Inside Job
References: <1170200864.492655.11850@s48g2000cws.googlegroups.com>
Message-ID: <45bff548$0$97249$892e7fe2@authen.yellow.readfreenews.net>


<stj911 at rock.com> wrote in message 
news:1170200864.492655.11850 at s48g2000cws.googlegroups.com...
> http://portland.indymedia.org/en/2006/06/341238.shtml
>
> BYU Physics Prof Finds Thermate in WTC Physical Samples, Building
> Collapses an Inside Job
> author: Jacob Hamblin
> Based on chemical analysis of WTC structural steel residue, a Brigham
> Young University physics professor has identified the material as
> Thermate. Thermate is the controlled demolition explosive thermite
> plus sulfur.

WRONG!  you must make this stuff up as you go along.

Thermate and thermite have nothing to do with "controlled demolition", 
moron.

What is the prime ingredient of both?  Rust.

The Iron Oxide(s), dummy.





From olsonas at gmail.com  Mon Jan 29 13:57:36 2007
From: olsonas at gmail.com (Drew)
Date: 29 Jan 2007 10:57:36 -0800
Subject: List Behavior when inserting new items
Message-ID: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>

I'm looking to add an element to list of items, however I'd like to 
add it at a specific index greater than the current size:

list = [1,2,3]
list.insert(10,4)

What I'd like to see is something like:

[1,2,3,,,,,,4]

However I see:

[1,2,3,4]

Is there any way to produce this kind of behavior easily?

Thanks,
Drew



From dilbert01 at gmail.com  Mon Jan 22 11:13:05 2007
From: dilbert01 at gmail.com (alessandro)
Date: 22 Jan 2007 08:13:05 -0800
Subject: closing a "forever" Server Socket
In-Reply-To: <1169143715.222186.30530@51g2000cwl.googlegroups.com>
References: <1169123381.930403.24170@38g2000cwa.googlegroups.com>
	<1169143715.222186.30530@51g2000cwl.googlegroups.com>
Message-ID: <1169482385.253887.249030@51g2000cwl.googlegroups.com>

thanks

infact the server_forever() method is only a serve() method inside an
infinite loop.

many thanks again,

Alessandro

Matimus ha scritto:

> > I want to ask if someone knows a better way for closing a "forever
> > server" or if there is a lack in my design.
>
> Generally you don't create a 'forever server'. You create an 'until I
> say stop' server. I would do this by looking at the 'serve_forever'
> method, and implementing my own 'serve_until_?' method that is similar,
> but will stop if a flag is set. Then you have to create a method for
> setting that flag. It could be as simple as a keypress, or you could
> add a quit method to your dispatcher that sets the flag when a certain
> address is visited. That second method probably needs some added
> security, otherwise anybody can just visit 'your.server.com/quit' and
> shut it down.



From larry.bates at websafe.com  Tue Jan 30 19:32:02 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 30 Jan 2007 18:32:02 -0600
Subject: Sorting a List of Lists
In-Reply-To: <1170201351.881776.257790@q2g2000cwa.googlegroups.com>
References: <1170201351.881776.257790@q2g2000cwa.googlegroups.com>
Message-ID: <NKednV2y6PUNfiLYnZ2dnUVZ_rjinZ2d@comcast.com>

apotheos at gmail.com wrote:
> I can't seem to get this nailed down and I thought I'd toss it out 
> there as, by gosh, its got to be something simple I'm missing.
> 
> I have two different database tables of events that use different 
> schemas. I am using python to collate these records for display. I do 
> this by creating a list of lists that look roughly like this:
> 
> events = [['Event URL as String', 'Event Title as String ', Event Date 
> as Datetime], ...]
> 
> I then thought I'd just go events.sort(lambda x,y: x[2]<y[2]) and call 
> it a day. That didn't work. But then lamda functions like to be very 
> simple, maybe object subscripts aren't allowed (even though I didn't 
> get an error). So I wrote a comparison function that looks much as you 
> would expect:
> 
> def date_compare(list1, 
> list2):
>     x = list1[2]
>     y = list2[2]
>     if 
> x>y:
>         return 
> 1
>     elif 
> x==y:
>         return 
> 0
>     else: # 
> x<y
>         return -1
> 
> But as before sorting with this function returns None.
> 
> What have I overlooked?
> 
Sort doesn't return a list, it sorts in place.  None is
the result code (if you will) of the sort completion.

-Larry


From martin.witte at gmail.com  Fri Jan  5 10:10:14 2007
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 5 Jan 2007 07:10:14 -0800
Subject: How to get file name on a remote server with ftplib?
In-Reply-To: <1168008952.020516.130890@s80g2000cwa.googlegroups.com>
References: <1168008952.020516.130890@s80g2000cwa.googlegroups.com>
Message-ID: <1168009814.236723.105280@51g2000cwl.googlegroups.com>


alex wrote:
> Hello,
>
> My script is trying to get a file from a remote server, every day it
> ftps from a directory. My code works perfect if I know the name of the
> file in the remote directory.
>
> ftp.retrbinary('RETR ' + filename, handleDownload)
>
> The problem is that in the future the name of the file is going to be
> aleatory. How can I get the file's name (only one file is in that
> directory) and store it in a variable before executing ftp.retrbinary?
>
> Thanks a lot for your help,
>
> Alex

You can use the nlst(dirname) method to retrieve a directory listing on
the remote server. If the remote server doesn't support NLST command
rhen you could do ftp.retrlines('LIST')  and parse the results to get a
directory listing.



From gagsl-py at yahoo.com.ar  Thu Jan 25 14:36:21 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 25 Jan 2007 16:36:21 -0300
Subject: How can i do this in Python?
References: <1169699143.237710.277160@l53g2000cwa.googlegroups.com><mailman.3140.1169707796.32031.python-list@python.org>
	<1169719194.084162.148380@v33g2000cwv.googlegroups.com>
Message-ID: <epdden$hjc$1@sea.gmane.org>

<bearophileHUGS at lycos.com> escribi? en el mensaje 
news:1169719194.084162.148380 at v33g2000cwv.googlegroups.com...

> I'm just curious, what's the advantage of using itemgetter there
> compared to something simpler like this (untested!)?

None!

-- 
Gabriel Genellina 




From antroy at gmail.com  Fri Jan  5 03:44:49 2007
From: antroy at gmail.com (Ant)
Date: 5 Jan 2007 00:44:49 -0800
Subject: Anyone persuaded by "merits of Lisp vs Python"?
In-Reply-To: <1167324666.002153.27570@a3g2000cwd.googlegroups.com>
References: <1167324666.002153.27570@a3g2000cwd.googlegroups.com>
Message-ID: <1167986689.741094.252270@v33g2000cwv.googlegroups.com>

Hi all,

On Dec 28 2006, 4:51 pm, "Paddy3118" <paddy3... at netscape.net> wrote:
> This month there was/is a 1000+ long thread called:
>  "merits of Lisp vs Python"
> In comp.lang.lisp.
>
> If you followed even parts of the thread, AND previously
> used only one of the languages AND (and this is the
> crucial bit), were persuaded to have a more positive view
> of the other language;

I sort of fall into this category. I'm a Java developer by trade, but
use Python for all of my non-work related projects, and any scripting I
need at work. I hadn't looked at Lisp.

I've been tempted a few times to look more into Lisp, especially after
reading some of Paul Graham's stuff which has a strong bias toward
Lisp.

The thread gave me a kick start into looking into Lisp more deeply, and
over the Christmas break I downloaded CLisp and ordered a couple of
Lisp books. There were no arguments that persuaded me particularly -
more curiosity about a few of the concepts that were bandied about:

a) Closures - and what they give you that Python co-routines don't.
b) Macros - how they can be used, and what advantages they give you.

They were the real persuasion points for me.

So far? After a bit of pain getting started and finding decent docs
(while waiting for the books to arrive) I've found the language quite
easy to use. I haven't got into closures or macros yet - I need to get
more familiar with the basics first, but first impressions are
favorable. It seems that there is nothing conceptually in Python that I
can't reasonably easily do in Lisp, but the Python syntax is much more
straightforward for most of the basics I think (such as dictionaries,
sets, list comprehensions etc), and the function/naming conventions for
the core language is much clearer and more obvious than in Lisp.



From carsten at uniqsys.com  Thu Jan  4 20:21:19 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 04 Jan 2007 20:21:19 -0500
Subject: Turn off line wrap for lists?
In-Reply-To: <1167958863.538291.60820@s34g2000cwa.googlegroups.com>
References: <1167958863.538291.60820@s34g2000cwa.googlegroups.com>
Message-ID: <1167960079.3332.7.camel@localhost.localdomain>

On Thu, 2007-01-04 at 17:01 -0800, _ wrote:
> (I did google for this, I promise)
> 
> How do I get python NOT to insert newlines into string representations
> of lists when I do something like this:
> 
> strCollector += "%s" % (['a', 'list', 'with', 'lots', 'of', 'elements']
> * 100)

What makes you think that that inserts newline characters? My python
doesn't do that:

>>> a = "%s" % (['a', 'list', 'with', 'lots', 'of', 'elements'] * 100)
>>> "\n" in a
False

> FYI I am using this to export data into tab delimited format

You could avoid reinventing the wheel by using the "csv" module.

-Carsten




From sturlamolden at yahoo.no  Tue Jan  9 10:04:11 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 9 Jan 2007 07:04:11 -0800
Subject: Execute binary code
In-Reply-To: <slrneq6vga.tcj.grahn+nntp@frailea.sa.invalid>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<1168288176.054142.232780@s80g2000cwa.googlegroups.com>
	<slrneq6vga.tcj.grahn+nntp@frailea.sa.invalid>
Message-ID: <1168355051.339026.211830@v33g2000cwv.googlegroups.com>


Jorgen Grahn wrote:

> For what it's worth[1], under Unix it /is/ impossible. The only way to bring in
> new code (short of dynamic libraries) is to call exec(2) or its variations,
> and all need a file system object to load the code from.

The x86 processor cannot tell the difference between code segments and
data segments. If the executable code is stored in string, all you need
is a pointer to the string holding the code. You can cast the string
address to a function pointer (possibly through a void* if the compiler
complains), then dereference (call) the function pointer.

Trojans, viruses and JIT compilers do this all the time. Here is an
(untested) example:

static PyObject*
call_code_in_string(PyObject *self, PyObject *args)
{
    char *s;
    int size;
    int arg1, arg2, arg3;
    typedef int (*func_t)(int,int,int);
    func_t pfunc;
    if(!PyArg_ParseTuple(args, "s#(iii)", &s, &size, &arg1, &arg2,
&arg3)) return NULL;
    pfunc = (func_t)((void *)s); /* if it fails, try
memcpy(&pfunc,&s,sizeof(void*)) instead */
    return PyInt_FromLong((long)pfunc(arg1, arg2, arg3));
}

Another possibility would be to just return the string address, and
then make the call possibly using ctypes.

static PyObject*
get_string_addr(PyObject *self, PyObject *args)
{
    char *s;
    int size;
    if(!PyArg_ParseTuple(args, "s#", &s, &size)) return NULL;
    return PyInt_FromLong((long)((void*)s));
}



From rzantow at gmail.com  Sat Jan  6 14:47:43 2007
From: rzantow at gmail.com (rzed)
Date: Sat, 06 Jan 2007 14:47:43 -0500
Subject: still struggling, howto use a list-element as a name ?
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
Message-ID: <Xns98B0968123CFErzantowgmailcom@208.49.80.253>

Stef Mientki <S.Mientki-nospam at mailbox.kun.nl> wrote in
news:b7908$459fef43$d443bb3a$26766 at news.speedlinq.nl: 

> In the example below, "pin" is an object with a number of
> properties. Now I want
> 1- an easy way to create objects that contains a number of these
> "pin" 2- an multiple way to access these "pin", i.e.
>          device.pin[some_index]
>      device.some_logical_name
> ad 1:
> a dictionary (as "pinlist" in the example) seems a very
> convenient 
>      way (from a viewpoint of the device creator).
> As you can see in the "__init__" section this dictionary can
> easily be transported to the pin-objects.
> 
> ad 2:
> THAT's the problem: how do automate these lines "self.GND =
> self.pin[0]" 
> 
> I'm also in for other solutions.
> 
> thanks,
> Stef
> 
> 
> class Power_Supply(device):
>      pinlist = {
>          0: ('GND', _DIG_OUT, _par2),
>          1: ('VCC', _DIG_OUT, _par33)
>          }
> 
>      def __init__(self):
>          # store pin-names and pin-parameters in pins
>          for k in self.pinlist.keys():
>            self.pin[k].Name = self.pinlist[k][0]
>            self.pin[k].Value = self.pinlist[k][2]
> 
>          # for some pins, we also want to be able to use logical
>          names # HOW TO USE SOMETHING like
>          #     "self.pinlist[0] = self.pin[0]"
>          # INSTEAD OF
>          self.GND = self.pin[0]
>          self.VCC = self.pin[1]
> 
> # create a Power_Supply instance and
> # test if pins can be referenced in
> Power = Power_Supply()
> netlist1 = ( Power.VCC, Power.pin[1], Power.GND, Power.pin[0] )

I may be confused about what you're after, but wouldn't something 
like this work? (I don't know what a _par2 object is; I've named 
it something here.)

class Power_Supply(device):
    def __init__(self):
        self.pin = {
            0:dict(Name='GND',Value=_DIG_OUT,something=_par2),
            1:dict(Name='VCC',Value=_DIG_OUT,something=_par33),
        }
        for k in self.pin.keys():
            self.__dict__[self.pin[k]['Name']] = self.pin[k]


From nono at hotmail.com  Mon Jan  1 12:39:57 2007
From: nono at hotmail.com (Osiris)
Date: Mon, 01 Jan 2007 18:39:57 +0100
Subject: BOOST confuses me: a few assumptions: true or false.....
Message-ID: <dqhip216ombu1erh0ngahbj6kj8754s1tn@4ax.com>

I read a lot of the html pages on installing boost etc. Still a lot of
confusion.

Here is what I want:
I have old, stable wonderful C-code I want to use in Python projects.
So I encapsulate the C-code in some C++ stuf and try to compile it
into a DLL.

1: I DL-ed boost_1_33_1.exe (I use WinXP) and unpacked to D:\boost
2: I started my MS Visual C++ 2005 and told the Studio that my
python2.4 includes and libs are at c:\python24\include and
c:\python24\libs
3: I found the project in D:\boost\libs\python\build\VisualStudio and
Studio converted that to the 8.0 version of my VC.
4: I compiled and got stuff in D:\boost\libs\python\build\bin-stage:
      208.896 boost_python.dll
         99.090 boost_python.exp
       166.216 boost_python.lib
        532.480 boost_python_debug.dll
         99.102 boost_python_debug.exp
       168.490 boost_python_debug.lib
    6.450.176 boost_python_debug.pdb
(the numbers are sizes)

Am I now set up to start on my own projects ?

Do I need bjam from here on ? or can I continue to do my own projects
in VC ?

do I need all the stuff in the folders  like D:\boost\libs\* (except
D:\boost\libs\python) ? they do not seem to be used till now...


here is an example of mine, to play around with:
However, I get the compile log (http://213.10.133.192/BuildLog.htm)

========================================
#include <stdlib.h>
#include <stdafx.h>

namespace { // Avoid cluttering the global namespace.

int my_int;   /* a global integer: or outside namespace ? */
 double calc ( double f)
 {
    my_int = (int) (f/2);
 //   printf( "Half of %f is %d\n", f, my_int ); 
    return f/2;
 }
 
}

#include <boost/python.hpp>

using namespace boost::python;

BOOST_PYTHON_MODULE( half )
{
    def("calc", calc ); 
}


From aeon.descriptor at gmail.com  Tue Jan 30 05:33:42 2007
From: aeon.descriptor at gmail.com (Brian Visel)
Date: Tue, 30 Jan 2007 05:33:42 -0500
Subject: Is any python like linux shell?
In-Reply-To: 1169398326.510530.180860@51g2000cwl.googlegroups.com
References: 1169398326.510530.180860@51g2000cwl.googlegroups.com
Message-ID: <1170153222.5050.22.camel@orbital.earthlink.net>

ipython is probably what you're looking for.



From nogradi at gmail.com  Wed Jan 31 14:25:57 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Wed, 31 Jan 2007 20:25:57 +0100
Subject: subway
In-Reply-To: <fs5wh.17867$K8.14561@news.edisontel.com>
References: <5f56302b0701310802y7e45c98fmaaebe090e34d410@mail.gmail.com>
	<17856.50898.477998.112022@montanaro.dyndns.org>
	<mailman.3360.1170266376.32031.python-list@python.org>
	<fs5wh.17867$K8.14561@news.edisontel.com>
Message-ID: <5f56302b0701311125nca98bc7gfe4e036357aa21c7@mail.gmail.com>

> > the egg file can not be downloaded completely, the connection is
> > closed at byte 138903 all the time and the file is bigger than that.
> > If anyone managed to grab the file please let me know so far I tried
> > wget and firefox.
>
> I've checked on my hd and found a recent (Jun 2006) checkout
> on the original SVN repos.
>
> There's everything in it: Subway code, web site and examples:
>
> <http://www.deelan.com/dev/subway/subway-svn-20060610.zip>
>
> HTH

Great! Thanks very much indeed.


From martin at v.loewis.de  Mon Jan  8 02:25:13 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 08 Jan 2007 08:25:13 +0100
Subject: Recommendations (or best practices)  to define functions (or
	methods)
In-Reply-To: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
Message-ID: <45A1F1D9.8070206@v.loewis.de>

vizcayno schrieb:
> Need your help in the "correct" definition of the next function. If
> necessary, I would like to know about a web site or documentation that
> tells me about best practices in defining functions, especially for
> those that consider the error exceptions management.

I agree with George Sakkis' remarks. The best way to define this function is

def ExecuteSQL(cmdSQL, cursor):
  return cursor.execute(cmdSQL)

If this raises an exception, it likely means there is something
wrong with the SQL statement. The program should abort, and the
developer should correct it.

Regards,
Martin


From steve at holdenweb.com  Thu Jan 11 11:43:54 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 11 Jan 2007 16:43:54 +0000
Subject: Newbie question: SMTP -> SQL Server
In-Reply-To: <1168531934.015865.177100@i56g2000hsf.googlegroups.com>
References: <1168529572.873867.207730@k58g2000hse.googlegroups.com>	<j0tph.33102$X97.7130@newsfe18.lga>
	<1168531934.015865.177100@i56g2000hsf.googlegroups.com>
Message-ID: <eo5pgc$pn7$1@sea.gmane.org>

jrpfinch wrote:
> Thank you.  I have just realised I completely misunderstand how SMTP
> servers work.  From what I can tell, when you run the cookbook script
> it listens locally on port 8025.
> 
> You then have to configure a Linux (in my case) account with a username
> and password so my external piece of software (on another Windows
> machine) can log in and use the SMTP server.
> 
> Then I write the some code in the cookbook example to redirect any mail
> content to the MS SQL server database.
> 
> Note that the external piece of software can only talk SMTP - this is
> why I am having to develop this script.
> 
> Does this sound sensible?  Any tips on how to configure my Linux box (I
> don't have much experience with Linux either)?
> 
> Many thanks
> 
> Jon
> 
Presumably you can configure the external piece of software at least to 
the extent of setting the email address it delivers to?

In that case it will be *much* simpler to set up an account on a mail 
server to receive these emails. That way the server will be available 
whenever the SMTP-based sender wants or needs to send mail, and you can 
use Python to collect the emails in batched using the POP protocol, as a 
client.

Once you receive the email messages then yes, it's perfectly practical 
to save the content in a SQL server database. mxODBC is one possible 
driver package (though it requires you to purchase a license for 
commercial use), and I seem to remember there's another one called 
adodbapi that is open source. There are almost certainly others, but 
it's a while since I used SQL Server with Python.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From fdelente at mail.cpod.fr  Fri Jan 26 14:04:39 2007
From: fdelente at mail.cpod.fr (Fabrice DELENTE)
Date: 26 Jan 2007 19:04:39 GMT
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
Message-ID: <45ba50c7$0$31432$426a74cc@news.free.fr>

> What have you tried?

I've tried

stdscr.addstr(0,0,"a??o?")

or

stdscr.addstr(0,0,"le?on")

The ASCII chars show correctly, but the accented characters don't, so I see
'ao' or 'leon' on the screen.

The term in which I display is 8-bit-able, so the problem is either on
ncurses side, or on python side.

I have

#!/usr/local/bin/python
#coding: iso8859-15

at the top of my python file.

-- 
Fabrice DELENTE


From no-spam at no-spam-no-spam.invalid  Mon Jan  1 07:51:51 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Mon, 01 Jan 2007 13:51:51 +0100
Subject: Forking in windows. Possible?
In-Reply-To: <1165949756.863476.57870@73g2000cwn.googlegroups.com>
References: <1165949756.863476.57870@73g2000cwn.googlegroups.com>
Message-ID: <enb05f$2l1$1@news.albasani.net>

dakman at gmail.com wrote:
> I know under mac/*nix it's possible to fork the proccess to the
> background and exit the parent process. I have used this on a couple of
> my projects, but right now I am working on a project that will be
> required to run in the background, I have considered using the .pyw
> extension on my files, but there will be parts of the program that will
> be required to show the console. So if anyone has an ideas...
> 
> -Thanks
> 

"Background" has not much meaning on Win as long as not another process is waiting for return. And you obviously want to click an icon in Explorer.

If you don't need the data memory status of the current process inherited, CreateProcess would be most similar.

Then there is win32console.GetConsoleWindow , ShowWindow(SW_HIDE), win32console.AllocConsole, win32ui.CreateEdit, taskbar functions, win32service
 etc. 


Robert


From marcpp at gmail.com  Fri Jan 26 07:40:28 2007
From: marcpp at gmail.com (Marcpp)
Date: 26 Jan 2007 04:40:28 -0800
Subject: Mounting shares with python
Message-ID: <1169815227.574577.176610@m58g2000cwm.googlegroups.com>

Hi, when i mount a share with python...

os.system ("mount -t smbfs -o username=nobody ...")

the problem is that I'll to be root.
Have a comand to send a root password...?
I've tried

os.system ("su")
os.system ("the password")

but it doesn't works.



From michael at mustun.ch  Wed Jan  3 20:10:44 2007
From: michael at mustun.ch (Michael M.)
Date: Thu, 04 Jan 2007 02:10:44 +0100
Subject: code optimization (calc PI) / Full Code of PI calc in Python
	and C.
In-Reply-To: <1167872076.937415.250340@11g2000cwr.googlegroups.com>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
	<459BFDCB.4000503@sschwarzer.net>
	<UGXmh.194$9v1.250@nntpserver.swip.net>
	<1167872076.937415.250340@11g2000cwr.googlegroups.com>
Message-ID: <cuYmh.201$9v1.239@nntpserver.swip.net>


Ok, here is the code. It is a translation of the following code, found 
on the internet.

* The C is very fast, Python not.
* Target: Do optimization, that Python runs nearly like C.


Auf 800 Stellen in 160 Zeichen...
------
int a=10000,b,c=2800,d,e,f[2801],g;main(){for(;b-c;)f[b++]=a/5;
     for(;d=0,g=c*2;c-=14,printf("%.4d",e+d/a),e=d%a)for(b=c;d+=f[b]*a,
     f[b]=d%--g,d/=g--,--b;d*=b);}

$ ./a.exe
31415926535897932384626433832795028841971693993751058209749445923078164062862089
98628034825342117067982148086513282306647093844609550582231725359408128481117450
28410270193852110555964462294895493038196442881097566593344612847564823378678316
52712019091456485669234603486104543266482133936072602491412737245870066063155881
74881520920962829254091715364367892590360011330530548820466521384146951941511609
43305727036575959195309218611738193261179310511854807446237996274956735188575272
48912279381830119491298336733624406566430860213949463952247371907021798609437027
70539217176293176752384674818467669405132000568127145263560827785771342757789609
17363717872146844090122495343014654958537105079227968925892354201995611212902196
08640344181598136297747713099605187072113499999983729780499510597317328160963185



Here the Python:
----------------------------------------------------
#!/usr/bin/python
# -*- coding: utf-8 -*-

## http://de.wikipedia.org/wiki/Pi_(Kreiszahl)


from __future__ import division
from array import array
import decimal
import time


#int a=10000,b,c=2800,d,e,f[2801],g;main(){for(;b-c;)f[b++]=a/5;
#    for(;d=0,g=c*2;c-=14,printf("%.4d",e+d/a),e=d%a)for(b=c;d+=f[b]*a,
#    f[b]=d%--g,d/=g--,--b;d*=b);}
#


print "\nTiming a 1 million loop 'for loop' ..."
start = time.clock()
for x in range(1000000):
   y = x  # do something
end = time.clock()
print "Time elapsed = ", end - start, "seconds"


start_prg = time.clock()


#pi=[]  ## create an empty array
pi=''

a=10000
b=0
c=5600  ## c=2800
d=0
e=0
f=[] # f[2801]
g=0


counter=c
while 0<=counter+4000:
   f.append(2000)  #   f.append( int(a/5) )
   counter=counter-1
   # b=b+1

#print "DEBUG: b counter: ", b, counter


while (c*2):
   d=0

   g=c*2  ## see while condition


   ## ---------------------------
   b=c  ## anzahl elemente
   #print "DEBUG: before 3 while loop..."
   #print "DEBUG: b=", b
   while (b-1):
     d = d + f[b]*a
     g=g-1
     f[b] = d%g
     d = int(d/g)  ## needs cast to int
     g=g-1

     d=d*b

     b=b-1  ## see while condition

     #print "DEBUG: d=", d


   c = c-14;
   #pi.append(str("%04d" % int(e + d/a))) # append to it
   pi = pi + str("%04d" % int(e + d/a))
   #print "%04d" % int(e + d/a),
   ## need cast to int
   #print int(e + int(d/a))
   e = d%a;

#print "".join(pi)
print pi

end_prg = time.clock()
print "Total Time elapsed = ", end_prg - start_prg, "seconds"


## EOF.
-------------------------------



Matimus wrote:

>>If someone is really interested in speed optimization, I can publish my
>>PI-calc code.
> 
> 
> I wouldn't mind seeing it. Chances are you will get much better help if
> you post your code anyway.
> 
> -Matt
> 


From bdesth.quelquechose at free.quelquepart.fr  Tue Jan  9 18:19:35 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 10 Jan 2007 00:19:35 +0100
Subject: injecting functions into a python sandbox within a python program
In-Reply-To: <45a4172e$0$71751$c30e37c6@ken-reader.news.telstra.net>
References: <45a4172e$0$71751$c30e37c6@ken-reader.news.telstra.net>
Message-ID: <45a41cb7$0$308$426a74cc@news.free.fr>

Graham Menhennitt a ?crit :
> I have a large Python 2.5 program that I want my users to be able to 
> "extend" using a Python script. However, I want their script to run in a 
> sandbox within the overall program so that they only have access to the 
> rest of the program via a single simple interface. Note that this is not 
> meant to be a real anti-hacker type security sandbox - just "help them 
> to avoid shooting themselves in the foot" type security.
> 
> So I created a single object that has the interface that I want them to 
> access. I call their script via "exec" passing the single interface 
> object in the "globals" parameter to exec. It (conceptually) looks like 
> this:
> 
> i = Interface()
> glob = { 'i': i }
> exec script in glob
> 
> Then they can call i.whatever() from within their script. This all works 
> fine.
> 
> Now, what I want to do is provide some "helper" functions for them to 
> use in the script. These functions still only access the rest of the 
> program via 'i'. They just wrap some of the interface functions to make 
> life easier for the user. My current solution is to prepend these 
> functions onto the start of the script. I.e.
> 
> helperFuncs = """
> def f1(): i.whatever()
> """
> 
> exec helperFuncs + "\n" + script.read() in glob
> 
> This works but doesn't seem very elegant.

Indeed.


If all your helper functions are really methods of the Interface 
instance, you may try this instead (NB : not tested):

glob = {
   'i': i,
   'f1': i.whatever,
}
exec script in glob

HTH


From tmaroff at yahoo.com  Wed Jan 10 21:24:08 2007
From: tmaroff at yahoo.com (Tristan)
Date: 10 Jan 2007 18:24:08 -0800
Subject: IDLE Python and Environment Variables
Message-ID: <1168482248.828858.161320@i39g2000hsf.googlegroups.com>

Hello community:
I post this because I could not find satisfactory answers in the posts
generated by this nice group.
I work on winXP. I have many little python applications in different
folders, each application can share or not other objects located in the

same or other folders.
The way I work to use these applications is:
1)      For almost everyone, I execute a corresponding ".bat file" into

which I define and/or include values for some "temporal"
environment variables that let me find all the objects that the
selected application uses. Sometimes I include in the .bat file the
execution of the application, but generally I leave in a prompt status,

ready to invoke python or some dos commands.
2)      When I close the command prompt window, there are no traces of
my
enviroment variables in my windows system (that is right). Only the
default windows environment variables remain.

I tried to do the same with the IDLE (and I imagine tha same occurs
with Python command line), but I have the next problem:
I can not find in IDLE (or another app?) the way to previously define
and/or include automatically values for my "temporal" environment
variables as I do in the .bat files. The use of Control Panel -> System

-> Advanced is tedious to use as, my enviroment variables values are
"temporal". 
Any advice,  please???



From ccw.thomas at gmail.com  Mon Jan 22 22:48:13 2007
From: ccw.thomas at gmail.com (ThomasC)
Date: 22 Jan 2007 19:48:13 -0800
Subject: Try to porting Python2.5 to Zaurus
Message-ID: <1169524093.736183.43370@q2g2000cwa.googlegroups.com>

Hi,
I'm a python newbie,
I learn it on my notebook, but it too heavy and too big.
I try to porting python2.5 to my Zaurus,
It running on Zaurus well, (just for my study, I didn't test all
modules and functions.)
If you have a Zaurus, and like python, welcome to use it.
I post it on here:
http://bean-pig.idv.tw/emb_study/archives/001049.html

Best Regards,
Thomas#



From toto at titi.de  Fri Jan  5 16:25:20 2007
From: toto at titi.de (laurent rahuel)
Date: Fri, 05 Jan 2007 22:25:20 +0100
Subject: find a .py path
In-Reply-To: <nKunh.45586$gl2.35454@newsfe16.lga>
References: <nKunh.45586$gl2.35454@newsfe16.lga>
Message-ID: <459ec336$0$21144$7a628cd7@news.club-internet.fr>

Hi,

What about :

import os.path
print os.path.abspath(__file__)

hg a ?crit :
> Hi,
> 
> Is there an easy way for a script being executed (from anywhere) to know
> where is is ... something in os.path ?
> 
> Thanks,
> 
> hg
> 


From dummy at dummy.nl  Thu Jan 18 07:59:50 2007
From: dummy at dummy.nl (Cecil Westerhof)
Date: Thu, 18 Jan 2007 13:59:50 +0100
Subject: Is it possible to fasten the import of cgi?
Message-ID: <45af6f47$0$322$e4fe514c@news.xs4all.nl>

I have a cgi-script dat uses the modules cgi, os, sys and time. Offcourse I
can not time the time used to import time, but os and sys do not take more
as a millisecond. My script itself takes 3 or 4 milliseconds. But importing
cgi takes 95 milliseconds. (This is on my test system a PII 300 MHz. Is
there a way to make this more fast? The import off cgi makes the script at
least 20 times as slow. Something like mod-python is not a possibility. I
could use it on my test machine, but not at the osting provider.



From deets at nospam.web.de  Tue Jan  9 02:18:58 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 09 Jan 2007 08:18:58 +0100
Subject: class unbound method and datetime.datetime.today()
In-Reply-To: <1168324795.850400.65150@i15g2000cwa.googlegroups.com>
References: <1168324795.850400.65150@i15g2000cwa.googlegroups.com>
Message-ID: <50gtv7F1g042nU1@mid.uni-berlin.de>

cinsky at gmail.com schrieb:
> Hi, I got confused when I learned the function datetime.today().
> 
> So far I learned, unless an instance is created, it is not possible to
> call the class method. For example:
> 
> class Foo:
>   def foo(self):
>     pass
> 
> Foo.foo()  # error: unbound method foo().
> 
> What makes me confused is that datetime class? in datetime module
> provides today() function that returns the datetime object.
> 
>>>> import datetime
>>>> datetime.datetime.today()
> datetime.datetime(2007, 1, 9, 15, 34, 35, 23537)
> 
> It looks like that datetime class provides today() method that can be
> callable even if it is unbound method. Do I correct?
> 
> If it is possible to make that kind of function (looks like static
> member function in C++), how can I make that?

It is called a classmethod (in contrast to an instancemethod, which is 
the usual thing), and you can do it - depending on the version of python 
you have - using the built-in funtion/decorator "classmethod". Like this:

class Foo(object):

    @classmethod
    def bar(cls):
        pass


Note that a classmethod gets passed the class as first argument, not an 
instance.

You can also create static methods, using "staticmethod". They won't get 
passed anything.

Diez


From michele.simionato at gmail.com  Wed Jan 10 23:47:14 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 10 Jan 2007 20:47:14 -0800
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <45A18D68.5020308@v.loewis.de>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
	<45A18D68.5020308@v.loewis.de>
Message-ID: <1168490834.576808.183840@k58g2000hse.googlegroups.com>

Martin v. L?wis wrote:
> If you want to, you can combine this with the factory/singleton
> patterns, to transparently create the objects on first access:
>
> class Registry:
>   def __getitem__(self, name):
>     # only invoked when attribute is not set
>     r = pin(name)
>     setattr(self, name, r)
>     return r
> registry = Registry()
>
> class pin:
>   def __init__(self, name):
>     self.name = name
>
> print registry.aap

<nitpick>
You probably meant __getattr__ instead of __getitem__  here ;)
</niptick>

This is an interesting approach, but I would probabily use the
traditional registry you discussed
before (too much magic here).

        Michele Simionato



From dotancohen at gmail.com  Thu Jan  4 01:15:09 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Thu, 4 Jan 2007 08:15:09 +0200
Subject: Unsubscribing from the list
In-Reply-To: <459C19D5.2040706@dcube-resource.be>
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>
	<ene064$bm5$1@sea.gmane.org>
	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>
	<enghj3$qhf$1@sea.gmane.org>
	<880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com>
	<engs22$6u3$1@sea.gmane.org>
	<880dece00701031033o151cbe76h92a5a5adde51db90@mail.gmail.com>
	<enh4g4$n0h$1@sea.gmane.org>
	<880dece00701031247l3d2354a3le318340653969de8@mail.gmail.com>
	<459C19D5.2040706@dcube-resource.be>
Message-ID: <880dece00701032215i646bec13kddd953b7f69e3c1c@mail.gmail.com>

On 03/01/07, Jan Dries <jan.dries at dcube-resource.be> wrote:
> Dotan Cohen wrote:
> > On 03/01/07, Robert Kern <robert.kern at gmail.com> wrote:
> >> He misunderstood you (as I nearly did, too). The way you phrased "decided that
> >> there was no futher interest on the page for me" is somewhat ambiguous: it can
> >> seem like it refers to the second time, not the first.
> >>
> >
> > Ah. Sorry. I'm getting better at confusing people :)
> >
> > if ($you=="got_offended") {
> >     $dotan="sorry";
> > }
>
> Except that on this list, you might offend people just by using vulgar
> language like that. Better rephrase it to:
>
> if you == "got_offended":
>      dotan = "sorry"
>
>

Er, that was quite the reason that I subscribed to the list in the
first place- to abandon php and get into python. I think that I had
better unsubscribe soon before I do any more damage :) Thanks, all,
for the wonderfully entertaining thread. I'll resubscribe in a few
months when I actually do have time to learn a new language- and I
hope that I haven't ruined any goodwill here. That was never my
intention, anyway.

Dotan Cohen

http://essentialinux.com/linux-software.php
http://tussik.com


From hg at nospam.org  Fri Jan  5 04:09:00 2007
From: hg at nospam.org (hg)
Date: Fri, 05 Jan 2007 10:09:00 +0100
Subject: find a .py path
Message-ID: <nKunh.45586$gl2.35454@newsfe16.lga>

Hi,

Is there an easy way for a script being executed (from anywhere) to know
where is is ... something in os.path ?

Thanks,

hg



From wolfgang.grafen at marconi.com  Tue Jan 16 10:02:36 2007
From: wolfgang.grafen at marconi.com (Wolfgang Grafen)
Date: Tue, 16 Jan 2007 16:02:36 +0100
Subject: Regular expressions question
In-Reply-To: <1168947810.175793.228620@51g2000cwl.googlegroups.com>
References: <1168947810.175793.228620@51g2000cwl.googlegroups.com>
Message-ID: <eoinj5$bqo$1@newsfeed.pit.comms.marconi.com>

Victor Polukcht wrote:
> I have 2 strings:
> 
> "Global               etsi3   *200 ok            30   100% 100%
> Outgoing"
> and
> "Global               etsi3   *   4 ok             30   100% 100%
> Outgoing"
> 
> The difference is "*200" instead of "*  4". Is there ability to write a
> regular expression that will match both of that strings?
> 
---------------------------- x.py begin --------
import re

s1 = "Global               etsi3   *200 ok            30   100% 100% Outgoing"
s2 = "Global               etsi3   *   4 ok             30   100% 100% Outgoing"

re_m = re.compile( "^"
                    "(\S+)"         # Global
                    "\s+"
                    "(\S+)"         # etsi3
                    "\s+"
                    "((\*)\s*(\d+))"    # *200 *  4
                    "\s+"
                    "(\S+)"         # ok
                    "\s+"
                    "(\S+)"         # 30
                    "\s+"
                    "(\S+)"         # 100%
                    "\s+"
                    "(\S+)"         # 100%
                    "\s+"
                    "(\S+)"         # Outgoing
                    "$"
                  ).match

print "match s1:", re_m(s1).groups()
print "match s2:", re_m(s2).groups()
----------------------------- x.py file end ---------

% python x.py
match s1: ('Global', 'etsi3', '*200', '*', '200', 'ok', '30', '100%', '100%', 'Outgoing')
match s2: ('Global', 'etsi3', '*   4', '*', '4', 'ok', '30', '100%', '100%', 'Outgoing')


From surekap at gmail.com  Thu Jan 25 17:39:59 2007
From: surekap at gmail.com (Prateek)
Date: 25 Jan 2007 14:39:59 -0800
Subject: Fast Imaging for Webserver
In-Reply-To: <mailman.3148.1169719938.32031.python-list@python.org>
References: <1169707586.701908.32860@v45g2000cwv.googlegroups.com>
	<mailman.3148.1169719938.32031.python-list@python.org>
Message-ID: <1169764799.867071.184160@h3g2000cwc.googlegroups.com>

Thanks for all the responses so far..

The 'imaging' app that I mentioned is actually serving as a library for
a bunch of other apps.
A typical scenario is icon processing. The source image *could* be
large (in this case it was 128x128 PNGA)

Think of it as a Mac Finder/Win Explorer style view (grid + imagelist)
where you're showing a bunch of data in icon form (16x16). For small
amounts of data, everything is ok... but as soon as I get to 600-700
items, the page takes forever to load. The obvious solution is
pagination but I'm doing some aggregate analysis on the data (like a
frequency distribution) where if I were to paginate the data, i'd lose
the client-side sorting ability (I'd have to sort server side which is
a whole other can of worms).

I'm gonna take Paul's advice and report as soon as I can. One other
alternative is to save this information on the filesystem (as temp
files) and route all future requests via the static file processing
mechanism (which can be handled by Apache)... do you think that is a
good idea?

Prateek

On Jan 25, 3:11 pm, "Fredrik Lundh" <fred... at pythonware.com> wrote:
> "Prateek" wrote:
> > Hi. I'm creating a web-application using CherryPy 2.2.1. My application
> > needs to process images (JPG/PNG files) to
>
> > 1) create thumbnails (resize them)
> > 2) overlay them on a custom background (a simple frame)
> > 3) Overlay 'badges' (small 16x16 images) on top of the final thumbnail
>
> > I am using PIL 1.1.5 which I have custom compiled on my development
> > machine (MacBook Pro 2.33Ghz Core Duo)..
> > I am using im.thumbnail for step 1 and im.paste for steps 2 and 3.
>
> > The problem is that this thing is just way too slow.
> > For ab -n 1000 -C session_id=2f55ae2dfefa896f67a80f73045aadfa4b4269f1
> >http://localhost:8080/imaging/icon/def/128/255(where def is the name
> > of the image - default in this case - 128 is the size in pixels and 255
> > is the background color), I am getting:
>
> > Document Path:          /imaging/icon/def/128/255
> > Document Length:        14417 bytes
>
> > Concurrency Level:      1
> > Time taken for tests:   18.664 seconds
> > Complete requests:      1000
> > Failed requests:        0
> > Broken pipe errors:     0
> > Total transferred:      14680000 bytes
> > HTML transferred:       14417000 bytes
> > Requests per second:    53.58 [#/sec] (mean)
> > Time per request:       18.66 [ms] (mean)
> > Time per request:       18.66 [ms] (mean, across all concurrent
> > requests)
> > Transfer rate:          786.54 [Kbytes/sec] received
>
> > FYI: This request returns a PNG image (image/png) and not html
>
> > My understanding is that the problem is either with the CherryPy setup
> > (which is likely because even in other cases, i don't get much more
> > than 65 requests per second) or PIL itself (even though I'm caching the
> > background images and source images)without knowing more about what kind of source images you're using, the
> amount of data they represent etc, it's not entirely obvious to me that 50+
> images per second on a single server is that bad, really.  unless the source
> images are rather tiny, that's plenty of pixels per second to crunch.
>
> are you really receiving more than 4500000 source images per day per
> server?
> 
> </F>



From horpner at yahoo.com  Wed Jan 17 09:24:31 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 17 Jan 2007 15:24:31 +0100
Subject: generate tuples from sequence
References: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>
Message-ID: <slrneqschk.l0.horpner@FIAD06.norwich.edu>

On 2007-01-17, Will McGugan <will at willmcgugan.com> wrote:
> Hi,
>
> I'd like a generator that takes a sequence and yields tuples containing
> n items of the sqeuence, but ignoring the 'odd' items. For example
>
> take_group(range(9), 3) -> (0,1,2) (3,4,5) (6,7,8)
>
> This is what I came up with..
>
>     def take_group(gen, count):
>         i=iter(gen)
>         while True:
>             yield tuple([i.next() for _ in xrange(count)])
>
> Is this the most efficient solution?

This is starting to seem like an FAQ. ;)

The Python library contains a recipe for this in the itertools
recipes in the documentation (5.16.3).

def grouper(n, iterable, padvalue=None):
    "grouper(3, 'abcdefg', 'x') --> ('a','b','c'), ('d','e','f'), ('g','x','x')"
    return izip(*[chain(iterable, repeat(padvalue, n-1))]*n)

It's more general and cryptic than what you asked for, though.

-- 
Neil Cerutti
We're not afraid of challenges. It's like we always say: If you want to go out
in the rain, be prepared to get burned. --Brazillian soccer player


From S.Mientki-nospam at mailbox.kun.nl  Thu Jan 11 17:21:46 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Thu, 11 Jan 2007 23:21:46 +0100
Subject: globals accros modules
In-Reply-To: <45a69cca$0$321$426a74cc@news.free.fr>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>
	<mailman.2556.1168492539.32031.python-list@python.org>
	<3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>
	<45a66cea$0$289$426a34cc@news.free.fr>
	<3137a$45a6851a$d443bb3a$24085@news.speedlinq.nl>
	<45a69cca$0$321$426a74cc@news.free.fr>
Message-ID: <38388$45a6b867$d443bb3a$10089@news.speedlinq.nl>

Bruno Desthuilliers wrote:
> Stef Mientki a ?crit :
>> Bruno Desthuilliers wrote:
>>
>>> stef a ?crit :
> (snip)
>>>> You can explain your collegaes, that
>>>> - the startindex of arrays changes from 1 to 0
>>>> - slices are upto, instead of including the final border
>>>> - indention is th? key
>>>> And tell them about all beautiful things in Python,
>>>> but tell them that they are going to loose all their globals ???
>>>
>>>
>>> It's a feature. Globals are definitively a BadThing(tm).
>>
>>
>> yes, I know, but my audience will accept that only in the long term.
> 
> Unless you clearly explain the benefits... Any code relying on the 
> existence of a global is:
> 1/ dependent on the existence of this global
> 2/ harder to understand
And you think physicians will believe that ?
And suppose they believe it, are the willing to stop their research to 
rethink and rewrite their code ;-)

> 
> FWIW, I'm currently fixing a simple Delphi program that's using quite a 
> few globals,
Then it was certainly not written by a Delphi-guy ;-)

  and since I'm not familiar with ObjectPascal (my experience
> with Pascal boils down to a few cs101 stuff like implementing a linked 
> list, some 6 or 7 years ago), I'm losing a lost of time with these [bip] 
> globals...
> 
>> But maybe this idea works:
>>
>> <file Ugly_MatLab_Globals.py>
>> global var1
>> global var2
>> </file Ugly_MatLab_Globals.py>
> 
> The 'global' statement only makes sens within a function, and it's only 
> a declaration, not a definition (-> it won't bind the following name by 
> itself - only tell the interpreter that this name is to be considered as 
> belonging to the module's namesepace ).
> 
> The minimal working example requires that you assign a default value:
> 
> # myglobs.py
> meaning_of_life = 42
thanks for the tip.
> 
> # another.py
> import myglobs
> print myglobs.meaning_of_life
> 
>>
>> <all other py-files in the project>
>> import Ugly_MatLab_Globals
>>
>> def some_function():
>>   import Ugly_MatLab_Globals
> 
> You don't have to reimport it here...
Then I miss something:

TEN = 10
TWELVE = 12
def some_function():
   global TEN
   TEN = 9
   TWELVE = 11
   print TEN, TWELVE

some_function()      #will print 9,11
print TEN, TWELVE    #will print 9,12

Or am I mistaken ?

cheers,
Stef Mientki


From gagsl-py at yahoo.com.ar  Thu Jan 18 23:25:35 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 01:25:35 -0300
Subject: Iterator length
In-Reply-To: <1169162762.997894.180320@q2g2000cwa.googlegroups.com>
References: <1169162762.997894.180320@q2g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070119012013.0406b9d0@yahoo.com.ar>

At Thursday 18/1/2007 20:26, bearophileHUGS at lycos.com wrote:

>def leniter(iterator):
>     """leniter(iterator): return the length of an iterator,
>     consuming it."""
>     if hasattr(iterator, "__len__"):
>         return len(iterator)
>     nelements = 0
>     for _ in iterator:
>         nelements += 1
>     return nelements
>
>Is it a good idea to extend the functionalities of the built-in len
>function to cover such situation too?

I don't think so, because it may consume the iterator, and that's a 
big side effect that one would not expect from builtin len()


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From erikgast at gmail.com  Tue Jan 16 07:20:05 2007
From: erikgast at gmail.com (Erik)
Date: 16 Jan 2007 04:20:05 -0800
Subject: wxPython, having images in a textCtrl
Message-ID: <1168950003.235431.231010@m58g2000cwm.googlegroups.com>

Is it possible with wxPython to place images in a textctrl (or a
styledtextctrl)?
If you don't get what I mean, just think about emoticons in the MSN
messenger
chat window. So is it possible to use images in a textCtrl?

Thanks

Erik



From bearophileHUGS at lycos.com  Wed Jan  3 20:18:11 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 3 Jan 2007 17:18:11 -0800
Subject: Sorting on multiple values, some ascending, some descending
In-Reply-To: <1167868015.112325.219410@i80g2000cwc.googlegroups.com>
References: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
	<1167852652.416990.158610@k21g2000cwa.googlegroups.com>
	<1167868015.112325.219410@i80g2000cwc.googlegroups.com>
Message-ID: <1167873490.470862.156240@6g2000cwy.googlegroups.com>

dwelden wrote:
> >    L.sort(key=lambda r: r.secondary, reverse=True)
> >    L.sort(key=lambda r: r.primary)
> Excellent! That looks just like what I needed.

Note that there is the (probably little used) operator.attrgetter()
too, with that you can avoid the possibly slow lambda:
L.sort(key=attrgetter("primary")

operator.itemgetter(n) is when you have items that can be be accessed
by index.

Bye,
bearophile



From bill.mill at gmail.com  Tue Jan 16 14:36:49 2007
From: bill.mill at gmail.com (Bill  Mill)
Date: 16 Jan 2007 11:36:49 -0800
Subject: Regex Question
In-Reply-To: <eo8vod$emn$1@zinnia.noc.ucla.edu>
References: <mailman.2540.1168446078.32031.python-list@python.org>
	<eo8vod$emn$1@zinnia.noc.ucla.edu>
Message-ID: <1168976209.504793.51890@38g2000cwa.googlegroups.com>

James Stroud wrote:
> Bill Mill wrote:
> > Hello all,
> >
> > I've got a test script:
> >
> > ==== start python code =====
> >
> > tests2 = ["item1: alpha; item2: beta. item3 - gamma--",
> > "item1: alpha; item3 - gamma--"]
> >
> > def test_re(regex):
> >    r = re.compile(regex, re.MULTILINE)
> >    for test in tests2:
> >        res = r.search(test)
> >        if res:
> >            print res.groups()
> >        else:
> >            print "Failed"
> >
> > ==== end python code ====
> >
> > And a simple question:
> >
> > Why does the first regex that follows successfully grab "beta", while
> > the second one doesn't?
> >
> > In [131]: test_re(r"(?:item2: (.*?)\.)")
> > ('beta',)
> > Failed
> >
> > In [132]: test_re(r"(?:item2: (.*?)\.)?")
> > (None,)
> > (None,)
> >
> > Shouldn't the '?' greedily grab the group match?
> >
> > Thanks
> > Bill Mill
> > bill.mill at gmail.com
>
> The question-mark matches at zero or one. The first match will be a
> group with nothing in it, which satisfies the zero condition. Perhaps
> you mean "+"?
>
> e.g.
>
> py> import re
> py> rgx = re.compile('1?')
> py> rgx.search('a1').groups()
> (None,)
> py> rgx = re.compile('(1)+')
> py> rgx.search('a1').groups()

But shouldn't the ? be greedy, and thus prefer the one match to the
zero? This is my sticking point - I've seen that plus works, and this
just confuses me more.

-Bill Mill
bill.mill at gmail.com



From gagsl-py at yahoo.com.ar  Tue Jan 30 12:20:41 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 14:20:41 -0300
Subject: How can I know both the Key c and Ctrl on the keyboard are
	pressed?
References: <1170147029.261981.322740@a75g2000cwd.googlegroups.com>
Message-ID: <op.tmy84rgpsd1mbx@gabriel2.softlabbsas.com.ar>

En Tue, 30 Jan 2007 05:50:29 -0300, <tidegenerator at tom.com> escribi?:

> How can I know the Key c and Ctrl on the keyboard are pressed? Or how
> to let the program press the
>
> key Ctrl+c automatically? I just want to use python to develop a
> script program.
> gear

If you are on Windows and want to trap the Ctrl-C combination, just catch  
the KeyboardInterrupt exception:

--- cut ---
 from time import sleep

while 1:
   try: sleep(1)
   except KeyboardInterrupt: print "Ctrl-C pressed"
--- cut ---

-- 
Gabriel Genellina



From http  Mon Jan 29 10:08:48 2007
From: http (Paul Rubin)
Date: 29 Jan 2007 07:08:48 -0800
Subject: Random passwords generation (Python vs Perl) =)
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<7x3b5uwfa2.fsf@ruckus.brouhaha.com>
	<1170082883.393745.244840@a34g2000cwb.googlegroups.com>
Message-ID: <7x64apzx8f.fsf@ruckus.brouhaha.com>

"Szabolcs Nagy" <nszabolcs at gmail.com> writes:
> file('/dev/urandom').read(6).encode('base64')
> (oneliner and without import sa op requested)

Nice, though Un*x dependent (os.urandom is supposed to be portable).


From time.swift at gmail.com  Sat Jan  6 19:07:05 2007
From: time.swift at gmail.com (time.swift at gmail.com)
Date: 6 Jan 2007 16:07:05 -0800
Subject: Why less emphasis on private data?
Message-ID: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>

Coming from a C++ / C# background, the lack of emphasis on private data
seems weird to me. I've often found wrapping private data useful to
prevent bugs and enforce error checking..

It appears to me (perhaps wrongly) that Python prefers to leave class
data public.  What is the logic behind that choice?

Thanks any insight.



From __peter__ at web.de  Fri Jan  5 09:23:38 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 05 Jan 2007 15:23:38 +0100
Subject: bug in copy.deepcopy or in getattr or in my understanding?
References: <1167942359.246311.80700@s34g2000cwa.googlegroups.com>
	<mailman.2301.1167966549.32031.python-list@python.org>
	<1168005716.195293.121490@38g2000cwa.googlegroups.com>
Message-ID: <enlmuc$25m$02$1@news.t-online.com>

Emin wrote:

> Thank you for your reply. As you guessed, I want to be able to select
> the method at runtime as in your final example, but when I tried your
> suggestion I got the same error (see below). I think the problem is
> that getattr is donig something different than in my example where I
> explicitly get it from the dict (see the very end of the transcript
> below):

This has nothing to do with getattr(). You currently can deep-copy
functions, but neither bound nor unbound methods:

>>> import copy
>>> def check(obj):
...     try:
...             copy.deepcopy(obj)
...     except:
...             return "FAILED"
...     return "OK"
...
>>> def function(*args): pass
...
>>> class A:
...     method = function
...
>>> check(function), check(A.method), check(A().method)
('OK', 'FAILED', 'FAILED')

Whether this a bug or a sensible limitation I don't know.

Peter


From matt at tplus1.com  Mon Jan 29 12:17:19 2007
From: matt at tplus1.com (Matthew Wilson)
Date: Mon, 29 Jan 2007 17:17:19 GMT
Subject: Can I undecorate a function?
Message-ID: <slrnersb0v.mua.matt@mwilson.umlcoop.net>

The decorator as_string returns the decorated function's value as
string.  In some instances I want to access just the function f,
though, and catch the values before they've been decorated.

Is this possible?

def as_string(f):
    def anon(*args, **kwargs):
        y = f(*args, **kwargs)
        return str(y)
    return anon

@as_string
def f(x):
    return x * x

Matt


-- 
A better way of running series of SAS programs:
http://overlook.homelinux.net/wilsonwiki/SasAndMakefiles


From TimDGCB at gmail.com  Tue Jan 30 16:37:05 2007
From: TimDGCB at gmail.com (TimDGCB at gmail.com)
Date: 30 Jan 2007 13:37:05 -0800
Subject: DCOP memory leak?
Message-ID: <1170193025.867274.242350@m58g2000cwm.googlegroups.com>

Hello,

I'm writing a python script for Amarok, I communicate with Amarok 
using DCOP.
Now, I have to call DCOP very often and I noticed that every time I 
make a DCOP call my program keeps growing in memory size.

To make sure it was DCOP i wrote the small program below:

from dcopext import DCOPClient, DCOPApp

while 0==0:
    dcop=DCOPClient()
    dcop.attach()
    AmarokDcopRes = DCOPApp ("amarok", dcop)
    ok, Ms = AmarokDcopRes.player.trackCurrentTimeMs()
    print Ms

If you run this script and monitor it's memory use you'll see that it 
keeps growing.

Does anyone know how I can solve this problem?

Kind regards,

Tim



From webraviteja at gmail.com  Fri Jan  5 08:01:10 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 5 Jan 2007 05:01:10 -0800
Subject: program deployment
In-Reply-To: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
Message-ID: <1168002070.704739.76470@q40g2000cwq.googlegroups.com>


king kikapu wrote:
> hi to all folks here,
>
> i am learning Python, just finished a book and i am starting to write
> programs.
> I just want to ask, is the "correct" way to deploy my programs to other
> computers, the .pyc files ??
>
> I now that with the "-m compileall ." switch can compile a .py file
> into bytecodes. So i suppose that if Python has to run a .pyc file, it
> will load and execute it faster. And if i have some "sensitive" data in
> my source, like passwords (and the source of cource!) they will be more
> secure in a compiled file.
>
> Is that correct ?
>
> Thanks a lot for any help!

Python code is normally deployed as straight source code. It gets
compiled  automatically on its first run and will subsequently load
this quickly. Passwords do not belong in the source code and they are
not secure simply by distributing bytecode instead. This applies to any
language, native or byte code compiled. Distributing bytecode may deter
non-technical users but that's just about it.



From michael at mustun.ch  Wed Jan  3 10:30:45 2007
From: michael at mustun.ch (mm)
Date: Wed, 03 Jan 2007 16:30:45 +0100
Subject: Unsubscribing from the list
In-Reply-To: <mailman.2242.1167837623.32031.python-list@python.org>
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com><ene064$bm5$1@sea.gmane.org>	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>
	<mailman.2242.1167837623.32031.python-list@python.org>
Message-ID: <t_Pmh.89$9v1.124@nntpserver.swip.net>

Fredrik Lundh wrote:

> if you're unable to follow written instructions, how on earth did you manage
> to subscribe to this list ?
> 
> </F> 
> 
> 
> 

*lol*   Just click.... ;-)


From tomas at fancy.org  Tue Jan  2 20:16:34 2007
From: tomas at fancy.org (Tom Plunket)
Date: Tue, 02 Jan 2007 17:16:34 -0800
Subject: DOS, UNIX and tabs
References: <emugom$t37$01$1@news.t-online.com>
	<pan.2006.12.28.03.22.21.587236@REMOVEME.cybersource.com.au>
	<mailman.2143.1167453331.32031.python-list@python.org>
	<en5e18$l39$03$1@news.t-online.com>
	<mailman.2163.1167518010.32031.python-list@python.org>
	<pan.2006.12.31.10.44.59.201060@gmx.net>
	<rolgp212fd1cshs8404v3c039he6hs4tvj@4ax.com>
	<en9v4k$4sg$2@lust.ihug.co.nz>
	<kcmip2dt5h9s2r9p4unrei8ehcutj2kuu5@4ax.com>
	<mailman.2217.1167758511.32031.python-list@python.org>
Message-ID: <ms0mp25fg097jgju19q3eqa73ode5513un@4ax.com>

Peter Decker wrote:

> > Maybe I'm also weird, but I use a variable-pitch font when programming
> > in Python.  So a "tab equals some number of spaces" really isn't useful
> > to me.  My setup is, "tab equals this much space".
> 
> A year ago I would have thought you were weird, but after reading a
> post by Ed Leafe, one of the creators of Dabo about using proportional
> fonts for readability, I thought I'd try it out, thinking that it was
> pretty wacky. Turns out that after a very brief adjustment period, I
> liked it!

Yep, I had a similar experience although a bit more forced.  The editor
that I was using was configured out-of-the-box with variable-pitch, and
I didn't want to bother figuring out how to change it for the quickie
stuff I was writing, then eventually I found that it no longer bothered
me...


-tom!

-- 


From TimDGCB at gmail.com  Wed Jan 31 12:46:25 2007
From: TimDGCB at gmail.com (TimDGCB at gmail.com)
Date: 31 Jan 2007 09:46:25 -0800
Subject: DCOP memory leak?
In-Reply-To: <qsqdnaZ8iZ52QSLYnZ2dnUVZ_o2vnZ2d@comcast.com>
References: <1170193025.867274.242350@m58g2000cwm.googlegroups.com>
	<qsqdnaZ8iZ52QSLYnZ2dnUVZ_o2vnZ2d@comcast.com>
Message-ID: <1170265582.892012.69290@v45g2000cwv.googlegroups.com>

On 31 jan, 01:03, Larry Bates <larry.ba... at websafe.com> wrote:
> TimD... at gmail.com wrote:
> > Hello,
>
> > I'm writing a python script for Amarok, I communicate with Amarok
> > using DCOP.
> > Now, I have to call DCOP very often and I noticed that every time I
> > make a DCOP call my program keeps growing in memory size.
>
> > To make sure it was DCOP i wrote the small program below:
>
> > from dcopext import DCOPClient, DCOPApp
>
> > while 0==0:
> >     dcop=DCOPClient()
> >     dcop.attach()
> >     AmarokDcopRes = DCOPApp ("amarok", dcop)
> >     ok, Ms = AmarokDcopRes.player.trackCurrentTimeMs()
> >     print Ms
>
> > If you run this script and monitor it's memory use you'll see that it
> > keeps growing.
>
> > Does anyone know how I can solve this problem?
>
> > Kind regards,
>
> > Tim
>
> I think you will find the objects are getting created so fast that
> garbage collection doesn't have time to clean them up as fast
> as you are creating new ones.  Since del dcop is not guaranteed
> to be "immediate" that won't help.
>
> Q: Can't you create dcop instance outside the loop and reuse it
> for every time through the loop?
>
> Q: Can you sleep or something after each loop or do you really
> want to peg the CPU checking forever?
>
> Q: How do you ever get out of this infinite loop?
> Note: while 0=0 is better written as while 1: and you need a
> break somewhere to get out of the loop.
>
> -Larry
Hi,

Thanks for the quick response.

The code I posted is not my actual program and was only to demonstrate
my problem. The complete program I'm writing uses QT and so the loop
is replaced by a Timer event.
I tried out the suggestion. I had already tried the del dcop
instruction, so I knew that wasn't it. I also placed the DCOP variable
outside my loop but that didn't help either.
What I did notice that my program only grew in memory use when the
'ok, Ms = AmarokDcopRes.player.trackCurrentTimeMs() ' code was
executed (or any other function using the AmarokDcopRes variable like
'ok, volume = AmarokDcopRes.player.getVolume()' )
Then I also tried to make my take a pause of a second in the loop but
this also didn't help, the program was still growing in memory use (a
lot slower though but I don't call that a solution)

So if you have any more ideas let me know. I'll keep on trying

Kind regards,

Tim



From oliphant.travis at ieee.org  Wed Jan 24 03:02:17 2007
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Wed, 24 Jan 2007 01:02:17 -0700
Subject: numpy or _numpy or Numeric?
In-Reply-To: <ep71iq$26m$1@news.kreonet.re.kr>
References: <ep71iq$26m$1@news.kreonet.re.kr>
Message-ID: <ep73ga$o84$1@sea.gmane.org>

auditory wrote:
> I am a newbie here
> 
> I am trying to read "space separated floating point data" from file
> 
> I read about csv module by searching this group,
> but I couldn't read space separated values with csv.
> (which may be matter of course..)
> 
> I also read about numpy.fromfile(file, sep=' ') which i can use.
> but on my machine(ubuntu linux) numpy is unknown module,
> which I didn't install by myself.

You will need to install NumPy.

> 
> While trying to install numpy accroding to its homepage.
> (http://numpy.scipy.org/numpydoc/numdoc.htm).
> i am quite confused.

You are reading old documentation for Numeric and so any installation 
description is how to install the Numeric module (not its newer 
replacement which is called NumPy).


So:

1) Yes, you need NumPy
2) This *is different* from Numeric
3) You get it by either installing a pre-built package for your system 
or by

    a) downloading the source tar-file from 
http://sourceforge.net/project/showfiles.php?group_id=1369&package_id=175103
      (get the numpy-<version>.tar.gz file
    b) tar zxvf numpy-<version>.tar.gz
    c) cd numpy-<version>
    d) sudo python setup.py install

    e) If you want to link against high-performance libraries on your 
system, then either put them in standard locations or edit the site.cfg 
file appropriately (Optional).

> 
> 4. Or what is general way to read 'space separated values' from file?

You can easily read space-separated values from a file by reading in a 
line at a time and using the split method of strings:

fid = open('filename')
linedata = fid.readlines()
new = [[float(x) for x in line.split()] for line in linedata]

new will be a nested sequence of floats.  You can convert it to an array 
(if you want to do math on it) using

anew = numpy.array(new)

-Travis



From horpner at yahoo.com  Wed Jan 10 09:53:49 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Jan 2007 15:53:49 +0100
Subject: Working with named groups in re module
Message-ID: <slrneq9vl3.bg.horpner@FIAD06.norwich.edu>

A found some clues on lexing using the re module in Python in an
article by Martin L?wis.

http://www.python.org/community/sigs/retired/parser-sig/towards-standard/

He writes:
  [...]
  A scanner based on regular expressions is usually implemented
  as an alternative of all token definitions. For XPath, a
  fragment of this expressions looks like this:


      (?P<Number>\\d+(\\.\\d*)?|\\.\\d+)|
      (?P<VariableReference>\\$""" + QName + """)|
      (?P<NCName>"""+NCName+""")|
      (?P<QName>"""+QName+""")|
      (?P<LPAREN>\\()|

  Here, each alternative in the regular expression defines a
  named group. Scanning proceeds in the following steps:

     1. Given the complete input, match the regular expression
     with the beginning of the input.
     2. Find out which alternative matched.
     [...]

Item 2 is where I get stuck. There doesn't seem to be an obvious
way to do it, which I understand is a bad thing in Python.
Whatever source code went with the article originally is not
linked from the above page, so I don't know what Martin did.

Here's what I came up with (with a trivial example regex):

  import re
  r = re.compile('(?P<x>x+)|(?P<a>a+)')
  m = r.match('aaxaxx')
  if m:
    for k in r.groupindex:
      if m.group(k):
        # Find the token type.
        token = (k, m.group())

I wish I could do something obvious instead, like m.name().

-- 
Neil Cerutti
After finding no qualified candidates for the position of principal, the
school board is pleased to announce the appointment of David Steele to the
post. --Philip Streifer


From rridge at csclub.uwaterloo.ca  Thu Jan 18 20:57:01 2007
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 18 Jan 2007 17:57:01 -0800
Subject: Determining when a file is an Open Office Document
References: <eop5ci$et5$1@solaris.cc.vt.edu>
Message-ID: <1169171821.468301.78770@51g2000cwl.googlegroups.com>

tubby wrote:
> Silly question, but here goes... what's a good way to determine when a
> file is an Open Office document? I could look at the file extension, but
> it seems there would be a better way. VI shows this info in the files:
>
> mimetypeapplication/vnd.oasis.opendocument.textPK

It's a ZIP archive.  The info you've found are the file name
"mimetype", the uncompressed contents of that file
"application/vnd.oasis.opendocument.text", and part of the ZIP magic
number "PK".  You should be able to use the "zipfile" module to check
to see if the file a ZIP file, if it has a member named "mimetype" and
if the contents of the file match one of the OpenOffice MIME types.

                                      Ross Ridge



From martin at v.loewis.de  Wed Jan  3 14:55:39 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 03 Jan 2007 20:55:39 +0100
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167852636.403469.69220@h40g2000cwb.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<1167543262.361311.123700@v33g2000cwv.googlegroups.com>
	<459BCF07.6080302@v.loewis.de>
	<1167852636.403469.69220@h40g2000cwb.googlegroups.com>
Message-ID: <459C0A3B.1030400@v.loewis.de>

vbgunz schrieb:
>>> I don't understand what all the fuss is about. Add a single page to the
>>> installer and on it, have 3 radio buttons. The choices could be "add to
>>> path (recommended)", "add to path with version", "do not add to path
>>> (not recommended)".
>> Please submit a patch to sf.net/projects/python that does so.
> 
> If I could I would. My only point jumping in here is this; adding
> python to the path has got to be more beneficially productive for
> everyone than not adding it at all. I don't even use Windows enough to
> complain about it and I thought I'll voice my agreement on it.

Ok. So I can answer your (implied) question: much of the fuss is about
lack of contributions.

Regards,
Martin


From rythin at gmail.com  Sat Jan  6 11:47:18 2007
From: rythin at gmail.com (Rythin)
Date: 6 Jan 2007 08:47:18 -0800
Subject: C++/Python programmers for a MUD's gamedriver wanted.
Message-ID: <1168102038.680286.73330@42g2000cwt.googlegroups.com>

Hi everyone.
We are looking for a volunteer co-programmers for a MUD's gamedriver
project. As of now, a gamedriver is divided into two separate but
tightly interconnected systems - C++ driver and Python lib.

C++ Driver is supposed to be managing memory, proccesses and
communication between them (transparent as far as net is concerned).
Python lib is to define the user's interfaces. Both of them are
designed to work in an object-oriented enviroment, with lib's classes
being driver's child-classes.

Competent level of knowledge on C++ and Python (especially embedding
Python's interpreter in apps) is required. Alternatively, we are
seeking people skilled in a use of Unix sockets and C++ system
programming.

If you are interested, email me at rythin at gmail.com (subject:
Gamedriver project) with a brief summary of your skills, C++/Python/mud
experience and things you are looking to find in this job.

You are welcome to ask any additional questions at rythin at gmail.com
(subject: Gamedriver project). 


Take care,
Michael



From deets at nospam.web.de  Sat Jan 20 11:14:34 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 20 Jan 2007 17:14:34 +0100
Subject: confused on python rpc with apache, is it possible?
In-Reply-To: <mailman.2945.1169309537.32031.python-list@python.org>
References: <mailman.2912.1169227938.32031.python-list@python.org>	<51ce8uF1k0tl5U1@mid.uni-berlin.de>	<mailman.2931.1169273350.32031.python-list@python.org>	<1169276359.477277.17930@q2g2000cwa.googlegroups.com>
	<mailman.2945.1169309537.32031.python-list@python.org>
Message-ID: <51etfpF1kappuU1@mid.uni-berlin.de>

krishnakant Mane schrieb:
>> Use mod_python with some xmlrpc handler. There is more than one around.
>> Google for them. That way you can keep Apache for both Python and PHP.
>>
> I am confused.
> I have some documents on xml-rpc but none of them mentioned apache.

There is nothing an apache will do for you - except from possibly 
proxing python.

Go read up upon xmlrpc and python, possibly doing it with twisted, but 
there are other options.

Don't bother with the apache.

Diez


From jan.m.danielsson at gmail.com  Tue Jan 23 00:54:55 2007
From: jan.m.danielsson at gmail.com (Jan Danielsson)
Date: Tue, 23 Jan 2007 06:54:55 +0100
Subject: Removing outdated files
In-Reply-To: <mailman.3015.1169530805.32031.python-list@python.org>
References: <45b59949@griseus.its.uu.se>
	<mailman.3015.1169530805.32031.python-list@python.org>
Message-ID: <45b5a21d$1@griseus.its.uu.se>

Gabriel Genellina wrote:
>>    I've been looking at the datetime.date class, but I can't see any
>> easy way to parse the week number from it. I could calculate this
>> information by brute force -- but I get a feeling that there are
>> functions in Python to extract week numbers from a date.
> 
> .isocalendar()

   .thanks()

-- 
Kind regards,
Jan Danielsson


From kkkisok at operamail.com  Wed Jan 10 18:00:57 2007
From: kkkisok at operamail.com (kkkisok at operamail.com)
Date: Wed, 10 Jan 2007 23:00:57 GMT
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
	<N6Uoh.43209$wc5.29633@newssvr25.news.prodigy.net>
	<eo2t6h$8qk_014@s808.apx1.sbo.ma.dialup.rcn.com>
	<0001HW.C1CA63B1059BC980F0203648@news.verizon.net>
	<eo33rr$8ss_008@s1005.apx1.sbo.ma.dialup.rcn.com>
	<MPG.200f26e6b5607c46989ef0@news.individual.net>
Message-ID: <eo3r7102umi@enews1.newsguy.com>



On 10-Jan-2007, krw <krw at att.bizzzz> wrote:

> ...and "HexaPussy" just wouldn't be right.


SexagesimalPussy (base 60) has kind of a nice ring to it.


From aboudouvas at panafonet.gr  Fri Jan 19 04:07:57 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 19 Jan 2007 01:07:57 -0800
Subject: PyODBC Stored proc calling
In-Reply-To: <1169115954.917268.74210@51g2000cwl.googlegroups.com>
References: <1169115954.917268.74210@51g2000cwl.googlegroups.com>
Message-ID: <1169197677.745994.262540@s34g2000cwa.googlegroups.com>

No one is using pyodbc ??  :)



From ask at me  Thu Jan 11 08:52:42 2007
From: ask at me (alf)
Date: Thu, 11 Jan 2007 07:52:42 -0600
Subject: globals accros modules
In-Reply-To: <mailman.2556.1168492539.32031.python-list@python.org>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>
	<mailman.2556.1168492539.32031.python-list@python.org>
Message-ID: <hI2dnbl7le233DvYnZ2dnUVZ_o-knZ2d@comcast.com>

Gabriel Genellina wrote:
> Change a=1 to amodule.a=1

I have multiple command line programs creating 'a' and amodule using it. 
   Plus some import sequence dependency. So it would not work. Currently 
the solution in amodule is:
import __main__
print __main__.a

> If you find yourself doing tricks with the module globals, think about 
> redesigning your application.

For what I do it is good enough. If I hit the same problem, will 
refactor it.

A.


From jan.dries at dcube-resource.be  Thu Jan  4 10:51:27 2007
From: jan.dries at dcube-resource.be (Jan Dries)
Date: Thu, 04 Jan 2007 16:51:27 +0100
Subject: Best way to implement a timed queue?
In-Reply-To: <459D0FF5.4020703@gmx.net>
References: <459D0FF5.4020703@gmx.net>
Message-ID: <459D227F.1020502@dcube-resource.be>

Thomas Ploch wrote:
> I am having troubles with implementing a timed queue. I am using the
> 'Queue' module to manage several queues. But I want a timed access, i.e.
> only 2 fetches per second max. I am horribly stuck on even how I
> actually could write it. Has somebody done that before? And when yes,
> how is the best way to implement it?

I don't know about "the best way" to implement it, but I once solved a 
similar problem with the following scenario.

The idea is that you create a "token" queue, a Queue object of the 
desired depth, 2 in your case. You then have a separate thread that, in 
a loop, puts two "tokens" on the queue and then puts itself to sleep for 
one second.

And the worker thread or threads that must be doing whatever twice per 
second try to get an object from the queue prior to doing their thing.

The following piece of code does the trick. Note that it allows worker 
threads to do something two times every second, and not once every half 
second, though it could easily be modified to accomodate that too.
Also note that the code below keeps running forever as worker threads 
never stop working. You will probably want to change that.

Regards,
Jan


import time
from Queue import Queue,Full,Empty
from thread import start_new_thread

class Manager(object):
     def __init__(self, number_of_workers=10, max_per_sec=5):
         self.MAX_PER_SEC = max_per_sec
         self.NUMBER_OF_WORKERS = number_of_workers
         self.timelimit = Queue(self.MAX_PER_SEC)
         self.donelock = Queue(0)
         self.finished = False

     def do_work(self,number):
         print "Starting worker thread %s" % number
         while True:
             if self.get_time():
                 # do whatever can only be done x times per second
                 print "Worker %s doing work" % number
                 time.sleep(3)  # simulate worker doing some work

         self.signal_done()

     def signal_done(self):
         self.donelock.put(None,True)

     def wait_done(self):
         for i in range(0,self.MAX_PER_SEC):
             self.donelock.get(True)
         self.finished = True

     def feed_time(self):
         while not self.is_finished():
             for i in range(0,self.MAX_PER_SEC):
                 self.insert_time()
             time.sleep(1)

     def insert_time(self):
         try:
             self.timelimit.put_nowait(None)
         except Full:
             pass

     def get_time(self):
         try:
             self.timelimit.get(True,10)
             return True
         except Empty:
             return False

     def is_finished(self):
         return self.finished

     def start_worker_threads(self):
         for i in range(0,self.NUMBER_OF_WORKERS):
             start_new_thread(self.do_work,(i + 1,))

     def start_time_thread(self):
         start_new_thread(self.feed_time,())

     def run(self):
         self.start_time_thread()
         self.start_worker_threads()
         self.wait_done()

def main():
     Manager(10,2).run()


if __name__ == "__main__":
     main()



From rweth at cisco.com  Sat Jan  6 14:37:55 2007
From: rweth at cisco.com (rweth)
Date: Sat, 06 Jan 2007 11:37:55 -0800
Subject: nntplib downloads content with extra linebreaks
In-Reply-To: <enosln$hn6$1@minji.szn.dk>
References: <1168110213.436860@sj-nntpcache-1.cisco.com>
	<enosln$hn6$1@minji.szn.dk>
Message-ID: <1168112276.194982@sj-nntpcache-1.cisco.com>

Klaus Alexander Seistrup wrote:
> Rweth wrote:
> 
>> I am using nntplib to download archived xml messages from our 
>> internal newsgroup. This is working fine except the download 
>> of files  to the connected server, has extra embedded lines in 
>> them (all over the place), from the
>>    s.body(id,afile)  # body method
> 
> The 'linebreaks' are probably '\r\n' pairs, so you could do a
> 
> 	buf.replace('\r\n', '\n')
> 
> to convert all such pairs to single LFs (buf being the buffer or 
> string that holds the text with 'linebreaks').
> 
> Cheers,
> 
Well Klaus I tried it .. sadly no joy.
Lets see if I did it the way you would have:
   buf = s.body(id)[3]
   # indexes 0 .. 2 contain disjoint portions but the big part is in
   # [3] so  .. i only did it for 3 for simplification
   bufHeal = []
   for aline in buf:
      bufHeal.append(aline.replace('\r\n', '\n'))

   fn = "c:/boing.xml"
   fh = open(fn.'w')
   for aline in bufHeal:
     fh.write(aline)
   fh.close()

This is giving me a file with no line breaks .. in fact
when I look at the elements in buf .. they don't have \r\n or \n at the 
end of them .. I think the s.body(id,afile) .. does a variety of magic 
to the contents of the buffer .. along with applying "some
magic template directive like an xsd file" again just guessing here.





From salvatore.difazio at gmail.com  Mon Jan 15 16:49:25 2007
From: salvatore.difazio at gmail.com (Salvatore Di Fazio)
Date: 15 Jan 2007 13:49:25 -0800
Subject: Watch log
In-Reply-To: <512astF1i9fgbU1@mid.individual.net>
References: <1168892415.324184.273210@l53g2000cwa.googlegroups.com>
	<512astF1i9fgbU1@mid.individual.net>
Message-ID: <1168897765.370442.201660@51g2000cwl.googlegroups.com>

Bjoern Schliessmann ha scritto:

> Why not read the file continuously and only do something if a new
> line is complete (i. e.  a newline char is detected)?

How can I read the file continuously?



From bignose+hates-spam at benfinney.id.au  Wed Jan  3 20:28:55 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 04 Jan 2007 12:28:55 +1100
Subject: static object
References: <459c306c$0$314$426a74cc@news.free.fr>
Message-ID: <87d55vbmw8.fsf@benfinney.id.au>

meelab <meelab at free.fr> writes:

> In other words, that is a class which would result in only 1 instance
> always the same no matter how many times I will "instantiate" it.

The "Singleton" pattern does what you say here. Implementing a proper
Singleton in Python is complicated and hard to understand.

However, there's nothing in your description that requires only one
*instance* of the class; you only require that any instance of that
class should share the same *state* with all other instances.

If that's true, you'll be better served by the much simpler Borg class
(referred to elsewhere in this thread, but for reference
<URL:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66531>).

> My purpose is to permit this class to initialize a massive amount of
> data that I need to access from different points of my program
> without duplicating this data in memory and without loosing time in
> reloading it each time I need it.

This can be further simplified by instantiating all that stuff in a
*module*, and importing the module wherever it is needed. No need for
custom classes at all, then.

-- 
 \       "Even if the voices in my head are not real, they have pretty |
  `\                                        good ideas."  -- Anonymous |
_o__)                                                                  |
Ben Finney



From mirandacascade at yahoo.com  Sun Jan  7 10:34:20 2007
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 7 Jan 2007 07:34:20 -0800
Subject: AES256 in PyCrypto
In-Reply-To: <pan.2007.01.07.10.30.53.653351@gmx.net>
References: <1168134542.337448.261510@s34g2000cwa.googlegroups.com>
	<pan.2007.01.07.10.30.53.653351@gmx.net>
Message-ID: <1168184060.548851.11540@i15g2000cwa.googlegroups.com>


Marc 'BlackJack' Rintsch wrote:

> `a` must be of length 32 for AES256.  And the length of `plainText` must
> be a multiple of 16 because it's a block cypher algorithm.

Thank you.  I have some follow up questions and 1 tangential question.

Follow up question:
Would it be correct to infer that:
 a) the AES.pyd extension module (plus whatever additional files within
the PyCrypto package that it uses) has the capability to perform AES256
encryption?
 b) the AES256 encryption happens based on the characteristics of the
input to the new() method...if the first argument has a length of 32,
the result will be AES256-style encryption?
 c) will AES256-style encryption also happen if the first argument to
the new() method has a length that is a multiple of 32, e.g. 64?

Tangential question:
Is there functionality available (either in the PyCrypto package or
some other package) that generates an initialization vector that can be
used as input to the new() method?  What prompts this question is that
the original posting referenced a snippet of C# code; some other
related snippets I saw seemed to suggest that:
a) a RijndaelManaged() class gets instantiated
b) that class has a GenerateIV() method which appears to populate
someting in a IV property
c) the application that was employing the AES256 encryption made use of
the left-most 16 characters of the IV property
So, I was curious whether something analgous exists in the Python
world.

Thank you.



From gagsl-py at yahoo.com.ar  Thu Jan 25 01:47:15 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 25 Jan 2007 03:47:15 -0300
Subject: How can i do this in Python?
In-Reply-To: <1169699143.237710.277160@l53g2000cwa.googlegroups.com>
References: <1169699143.237710.277160@l53g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070125033729.04414ae8@yahoo.com.ar>

At Thursday 25/1/2007 01:25, NoName wrote:

>perl -ane "print join(qq(\t), at F[0,1,20,21,2,10,12,14,11,4,5,6]).qq(\n)"

Must be done on a single line?
I'm not sure if I've got right the behavior - it's been some time 
since I quit writing Perl code. The script iterates over all lines 
contained on all files specified on the command line; for each line, 
splits it on whitespace; then it prints a selected set of fields 
(columns 0, 1, 20, 21...) using a tab character as field separator.

=== cut ===
import operator,fileinput

mapper = map(operator.itemgetter, [0,1,20,21,2,10,12,14,11,4,5,6])
for line in fileinput.input():
     fields = line.split()
     print '\t'.join(m(fields) for m in mapper)
=== cut ===


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From ptmcg at austin.rr._bogus_.com  Mon Jan  8 03:44:20 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 8 Jan 2007 02:44:20 -0600
Subject: regex question
References: <1168232001.377605.236270@11g2000cwr.googlegroups.com>
	<45a1f0c6$0$18929$4c368faf@roadrunner.com>
	<1168243020.304940.212700@42g2000cwt.googlegroups.com>
Message-ID: <45a20464$0$9644$4c368faf@roadrunner.com>


"proctor" <12cc104 at gmail.com> wrote in message 
news:1168243020.304940.212700 at 42g2000cwt.googlegroups.com...
>
>
> it does work now...however, one more question:  when i type:
>
> rx_a = re.compile(r'a|b|c')
> it works correctly!
>

Do you see the difference between:

rx_a = re.compile(r'a|b|c')

and

rx_a = re.compile("r'a|b|c'")

There is no difference in the variable datatype between "string" and "raw 
string".  Raw strings are just a notational helper when creating string 
literals that have lots of backslashes in them (as happens a lot with 
regexps).

r'a|b|c'  is the same as 'a|b|c'
r'\d' is the same as '\\d'

There is no reason to "add raw strings" to your makeRE method, since you 
don't have a single backslash anywhere.  And even if there were a backslash 
in the 'w' argument, it is just a string - no need to treat it differently.

-- Paul 




From Thomas.Ploch at gmx.net  Fri Jan  5 10:35:00 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Fri, 05 Jan 2007 16:35:00 +0100
Subject: program deployment
In-Reply-To: <12psqtppgi5cme6@corp.supernews.com>
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
	<12psqtppgi5cme6@corp.supernews.com>
Message-ID: <459E7024.3040204@gmx.net>

Grant Edwards schrieb:
> On 2007-01-05, king kikapu <aboudouvas at panafonet.gr> wrote:
> 
>>> Python code is normally deployed as straight source code.
>> But isn't this a problem of its own? I mean, many people do not feel
>> good if the know that their source code is lying around on other
>> machines...
> 
> Are they embarassed by their code?
> 

hehehe, but what I am thinking: Is it somehow possible to _really_ hide
the source from being viewed by other persons when using python? Not
that I want to do that ( I am an Open Source friend ), but that might
get others that rely on that (commercial) to use python for more
projects as it is done now.

Thomas


From huayang.xia at gmail.com  Thu Jan  4 12:02:28 2007
From: huayang.xia at gmail.com (Huayang Xia)
Date: 4 Jan 2007 09:02:28 -0800
Subject: what is this?
In-Reply-To: <mailman.2289.1167928928.32031.python-list@python.org>
References: <mailman.2289.1167928928.32031.python-list@python.org>
Message-ID: <1167930148.312902.71540@6g2000cwy.googlegroups.com>

Sequence slicing [starting-at-index :  but-less-than-index [ : step]].
Start defaults to 0, end to len(sequence), step to 1.
So l[i::rows] means: slicing start from i, ending with len(l) and step
with rows. So function colsplit(l, cols) returns a list of sequence
with conversion of:

Assume cols = 4:
From:

ABCD
ABCD
ABCD
AB

To:
AAAABBBBCCCDDD



On Jan 4, 11:42 am, "Eric Price"
<soyouthinkimgonnaliket... at hotmail.com> wrote:
> Hello;
> I'm studying some code examples from the python cookbook site. I came across
> this:
>
> def colsplit(l, cols):
>     rows = len(l) / cols
>     if len(l) % cols:
>         rows += 1
>     m = []
>     for i in range(rows):
>         m.append(l[i::rows])
>     return m
>
> What I'd like to know is what is the double colon? What does it do?
>         m.append(l[i::rows])
>
> Thanks,
> Eric
>
> _________________________________________________________________
> Type your favorite song.  Get a customized station.  Try MSN Radio powered
> by Pandora.http://radio.msn.com/?icid=T002MSN03A07001



From gagsl-py at yahoo.com.ar  Sat Jan 13 09:15:12 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 13 Jan 2007 11:15:12 -0300
Subject: module file
References: <45a7ba78$0$316$426a74cc@news.free.fr> <87hcuv527c.fsf@smsnet.pl>
Message-ID: <eoaphc$u7s$1@sea.gmane.org>

"Rob Wolfe" <rw at smsnet.pl> escribi? en el mensaje 
news:87hcuv527c.fsf at smsnet.pl...
> Imbaud Pierre <pierre.imbaud at laposte.net> writes:
>
>> I am willing to retrieve the file an imported module came from;
>> module.__file__, or inspect.getfile(module) only gives me the
>> relative file name. How do I determine the path?
>
>>>> import os
>>>> os.path.abspath(module.__file__)

Note that this works only if the current dir has not changed. So it's a good 
idea to store the absolute path as early as possible (before the program 
have a chance to change the current dir)

-- 
Gabriel Genellina 





From Hieu.D.Hoang at gmail.com  Thu Jan 25 06:31:43 2007
From: Hieu.D.Hoang at gmail.com (Hieu.D.Hoang at gmail.com)
Date: 25 Jan 2007 03:31:43 -0800
Subject: Do I need Python to run Blender correctly?
In-Reply-To: <1169722064.189055.61620@v45g2000cwv.googlegroups.com>
References: <tRZth.2027$pH3.140@newsfe12.phx>
	<1169722064.189055.61620@v45g2000cwv.googlegroups.com>
Message-ID: <1169724703.257330.188030@v45g2000cwv.googlegroups.com>



On Jan 25, 5:47 pm, g... at dsdata.it wrote:
> On Jan 25, 9:25 am, "AKA gray asphalt" <goodidea1... at hotmail.spam.com>
> wrote:
>
> > I downloaded Blender but there was no link for python. Am I on the right
> > track?
> Don't worry, Blender includes its own bundled Python interpreter, which
> is usually one version behind; just leave it alone.
>
> Lorenzo Gatti

Also note that only standard modules bundled in the Blender package are
available. And extension modules e.g. numpy can't be installed into it.
You must have the same version of python as the one in Blender.
Starting blender from a terminal told me that.

Happy designing!
Hieu



From __peter__ at web.de  Tue Jan 23 13:42:01 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 23 Jan 2007 19:42:01 +0100
Subject: Overloading assignment operator
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <ep5kt4$sun$01$1@news.t-online.com>

Achim Domma wrote:

> I want to use Python to script some formulas in my application. The user
> should be able to write something like
> 
> A = B * C
> 
> where A,B,C are instances of some wrapper classes. Overloading * is no
> problem but I cannot overload the assignment of A. I understand that
> this is due to the nature of Python, but is there a trick to work around
> this?

>>> class D(dict):
...     def __setitem__(self, key, value):
...             print key, "<--", value
...             dict.__setitem__(self, key, value)
...
>>> namespace = D(B=42, C=24)
>>> exec "A = B * C" in namespace
A <-- 1008

Peter


From kernel1983 at gmail.com  Tue Jan 16 21:44:20 2007
From: kernel1983 at gmail.com (kernel1983)
Date: 16 Jan 2007 18:44:20 -0800
Subject: How can I create a linked list in Python?
In-Reply-To: <mailman.2806.1168998923.32031.python-list@python.org>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<eojb9v$92rq$1@netnews.upenn.edu>
	<mailman.2806.1168998923.32031.python-list@python.org>
Message-ID: <1169001860.627239.116000@v45g2000cwv.googlegroups.com>

Every language has its own way to do the business!
Python has a more abstract data type as the common tools.
Just do things in pythonic way!

On 1?17?, ??9?55?, Gabriel Genellina
<gagsl... at yahoo.com.ar> wrote:
> At Tuesday 16/1/2007 17:07, Dongsheng Ruan wrote:
>
> >Thanks for your kindly help.
> >I am new CS student taking datat structure and algorithms with AHO's book
> >with the same title.
>
> >The book is done in Pascal, which might be an outdated language.
>
> >However, my instructor probably wants us to understand the list ADT better
> >by not using the built in list in Python.Just use the same structure as the book. Instead of nil, use None;
> instead of new(P) where P:^Foo, use P=Foo(); records become classes
> without methods...
>
> Anyway, implementing linked lists, dictionaries, and other basic
> structures in a language like Pascal, or C -which doesn't have them
> natively- may be a good learning exercise. But doing that in Python
> is not a good idea. Of course, using Python in a second or third
> algorithms course *is* a good idea, because you can forget about
> these implementation details and concentrate on the algorithms.
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya!http://www.yahoo.com.ar/respuestas



From jackdied at jackdied.com  Wed Jan  3 16:33:33 2007
From: jackdied at jackdied.com (Jack Diederich)
Date: Wed, 3 Jan 2007 16:33:33 -0500
Subject: Py_BuildValue or PyList_SetItem()
In-Reply-To: <1167858998.103361.222490@i12g2000cwa.googlegroups.com>
References: <1167858998.103361.222490@i12g2000cwa.googlegroups.com>
Message-ID: <20070103213333.GD14633@performancedrivers.com>

On Wed, Jan 03, 2007 at 01:16:38PM -0800, Sheldon wrote:
> I have a function that creates python objects out of C arrays and
> returns them to Python. Below is a working example that I later want to
> expand to return 12 arrays back to Python. The problem is that when I
> print out the values in Python I get undesired reults. See below. Does
> anyone know what is going on here?
> The array values are good before the conversion.
> 
> **************************************
> int createPythonObject(void) {
>   int i,j,k;
>   PyObject *Rva=PyList_New(12);
> 
>   for (i = 0; i < 12; i++) {
>     PyObject *op = PyFloat_FromDouble((double)va[i]);
>     if (PyList_SetItem(Rva,i,op) !=0) {
>       fprintf(stderr,"Error in creating python va object\n");
>       exit(EXIT_FAILURE);
>     }
>     Py_DECREF(op);
>     op = 0;
>   return Py_BuildValue("N",Rva);
>  }
> 
> Results in Python:
> 
> <refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at
> 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0
> at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>,
> <refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at
> 0x80d885c>, <refcnt 0 at 0x80d885c>
> 

PyList_SetItem steals a reference to "op" so DECREF'ing it reduces
the refcount to zero.

http://docs.python.org/api/listObjects.html

-Jack


From martin.laloux at gmail.com  Thu Jan 25 09:55:25 2007
From: martin.laloux at gmail.com (martin.laloux at gmail.com)
Date: 25 Jan 2007 06:55:25 -0800
Subject: how to unistall a Python package?
In-Reply-To: <epad97$fhqb$1@zam602.zam.kfa-juelich.de>
References: <epad97$fhqb$1@zam602.zam.kfa-juelich.de>
Message-ID: <1169736925.096771.233740@k78g2000cwa.googlegroups.com>


you delete it from lib



From Barry.Carroll at psc.com  Fri Jan 19 15:20:26 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Fri, 19 Jan 2007 12:20:26 -0800
Subject: OT Annoying Habits (Was: when format strings attack)
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A96@eugsrv400.psc.pscnet.com>

Greetings:

Personally, I don't think top-posting is the most annoying newsgroup
habit.  I think it's making a big fuss about minor inconveniences.  

One of the nicest things about being human is the amazing flexibility of
our brains.  For example, if a block of text isn't arranged in the order
we're used to, we can easily rearrange it mentally and read it anyway.
Oriental and Arabic peoples, for example, do this each time they read
something written in English.  It's EASY, once you get used to it!

It took me about 3 seconds to realize that Mr. D'Aprano' Q&A session was
laid out bottom-to-top instead of top-to-bottom.  After that, it made
perfect sense.  While it was a excellent way to demonstrate his
argument, it failed to prove his point, because, while top-to-bottom may
be the way he reads things, it isn't the way _everyone_ reads things.  

So, as far as I'm concerned, post your posts in whatever manner works
for you.  If it's in English, I'll figure it out.  If not, well, there's
always Babelfish.   ;^)

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed


> -----Original Message-----
> From: Steven D'Aprano [mailto:steve at REMOVE.THIS.cybersource.com.au]
> Sent: Friday, January 19, 2007 11:30 AM
> To: python-list at python.org
> Subject: Re: when format strings attack
> 
> On Fri, 19 Jan 2007 10:43:53 -0800, John Zenger wrote:
> 
> > Perhaps it is not as severe a security risk, but pure Python
programs
> > can run into similar problems if they don't check user input for %
> > codes.
> 
> Please don't top-post.
> 
> A: Because it messes up the order that we read things.
> Q: Why?
> A: Top-posting.
> Q: What is the most annoying newsgroup habit?
> 
> 
> > Example:
> >
> >>>> k = raw_input("Try to trick me: ")
> > Try to trick me: How about %s this?
> >>>> j = "User %s just entered: " + k
> >>>> print j % "John"
> > Traceback (most recent call last):
> >   File "<pyshell#8>", line 1, in ?
> >     print j % "John"
> > TypeError: not enough arguments for format string
> 
> That's hardly the same sort of vulnerability the article was talking
> about, but it is a potential bug waiting to bite.
> 
> In a serious application, you should keep user-inputted strings
separate
> from application strings, and never use user strings unless they've
been
> made safe. See Joel Spolsky's excellent article about one way of doing
> that:
> 
> http://www.joelonsoftware.com/articles/Wrong.html
> 
> 
> 
> --
> Steven.
> 




From S.Mientki-nospam at mailbox.kun.nl  Tue Jan 30 18:41:11 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Wed, 31 Jan 2007 00:41:11 +0100
Subject: how to "free" an object/var ?
Message-ID: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>

If I create a large array of data or class,
how do I destroy it (when not needed anymore) ?

Assign it to an empty list ?

thanks,
Stef Mientki


From laurent.pointal at limsi.fr  Tue Jan 23 07:16:20 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 23 Jan 2007 13:16:20 +0100
Subject: I need suggests
In-Reply-To: <1169551582.196591.48140@v45g2000cwv.googlegroups.com>
References: <1169551582.196591.48140@v45g2000cwv.googlegroups.com>
Message-ID: <ep4v6k$q9u$1@upsn250.cri.u-psud.fr>

Pat a ?crit :
> I have to do a big programm. Could someone give me some suggests about
> IDE (on Linux) and books to learn.
> 


+ For the IDE:
http://wiki.python.org/moin/IntegratedDevelopmentEnvironments
Test some, take the one corresponding to your taste/feeling.

+ For books:
http://wiki.python.org/moin/PythonBooks

You may get more help in c.l.python about book choice by explaining to
readers what is your computer science knowledge level, and what is the
domain of this big program (text processing, network, GUI...).

A+

Laurent.



From martin at v.loewis.de  Tue Jan  9 17:46:41 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 09 Jan 2007 23:46:41 +0100
Subject: Python - C# interoperability
In-Reply-To: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>
References: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>
Message-ID: <45a41b51$0$19653$9b622d9e@news.freenet.de>

mc schrieb:
> Is there an easy way to compile a Python class (or set of classes) into
> a .DLL that a C# program can call?  Or otherwise to use an existing
> library of Python classes from a C# program as seamlessly as possible?

You should take a look at IronPython, which supports that kind of thing.

Regards,
Martin


From webraviteja at gmail.com  Tue Jan  9 01:41:47 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 8 Jan 2007 22:41:47 -0800
Subject: How to write temporary data to file?
In-Reply-To: <mailman.2461.1168316179.32031.python-list@python.org>
References: <mailman.2461.1168316179.32031.python-list@python.org>
Message-ID: <1168324907.803841.79020@42g2000cwt.googlegroups.com>


Thomas Ploch wrote:
> Hi folks,
>
> I have a data structure that looks like this:
>
> d = {
> 	'url1': {
> 		'emails': ['a', 'b', 'c',...],
> 		'matches': ['d', 'e', 'f',...]
> 	},
> 	'url2': {...
> }
>
> This dictionary will get _very_ big, so I want to write it somehow to a
> file after it has grown to a certain size.
>
> How would I achieve that?
>
> Thanks,
> Thomas

Pickle/cPickle are standard library modules that can persist data.
But in this case, I would recommend ZODB/Durus.

(Your code example scares me. I hope you have benevolent purposes for
that application.)

Ravi Teja.



From gagsl-py at yahoo.com.ar  Wed Jan 17 16:20:31 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 17 Jan 2007 18:20:31 -0300
Subject: 2.3-2.5 what improved?
In-Reply-To: <1169040587.340057.11040@m58g2000cwm.googlegroups.com>
References: <mailman.2817.1169029744.32031.python-list@python.org>
	<eol0qn$kvj$1@news.albasani.net>
	<1169040587.340057.11040@m58g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20070117181603.046aa858@yahoo.com.ar>

At Wednesday 17/1/2007 10:29, billie wrote:

> > Python 2.5 became quite fat. For bare CGI the Python load/init
> > time eats all improvements. Smaller scripts even loose lot of speed.
>What do you mean? Fat of libraries or fat itself?
>I tought that 2.5 was faster than precedent versions! :-\

It runs faster, but has a slower start time. For CGI, when you launch 
a new process with every request, this is bad.
(This is a general problem with CGI itself - perhaps one should 
consider other alternatives, like FastCGI, mod_python, WSGI...)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From gagsl-py at yahoo.com.ar  Thu Jan 25 20:21:45 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 25 Jan 2007 22:21:45 -0300
Subject: Right-Justifying Numeric Output
In-Reply-To: <Pine.LNX.4.64.0701251433350.15822@salmo.appl-ecosys.com>
References: <mailman.3171.1169763446.32031.python-list@python.org>
	<ybauh.51060$oA1.7068@newsfe19.lga>
	<Pine.LNX.4.64.0701251433350.15822@salmo.appl-ecosys.com>
Message-ID: <7.0.1.0.0.20070125222128.04779e10@yahoo.com.ar>

At Thursday 25/1/2007 19:34, Rich Shepard wrote:

> > assuming max size = 10
> >
> > #with spaces
> >>> '% 10d' % 11
> > '        11'
> > #with zeros
> >>> '%010d' % 11
> > '0000000011'
>
>    Thank you very much! I didn't see this in any of my Python books or on the
>Web.

http://docs.python.org/lib/typesseq-strings.html


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From deets at nospam.web.de  Tue Jan 30 07:41:04 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 30 Jan 2007 13:41:04 +0100
Subject: error messages containing unicode
References: <1170122515.980168.150960@p10g2000cwp.googlegroups.com>
	<pan.2007.01.30.02.48.10.853852@REMOVEME.cybersource.com.au>
	<1170160464.576122.62230@h3g2000cwc.googlegroups.com>
Message-ID: <528sn0F1nhkoiU1@mid.uni-berlin.de>

>> (2) convert the file name to ASCII before you store it; or
> I need the non-ascii information, though, which is why I included it
> in the error message.

Then convert it to utf-8, or some encoding you know it will be used by your
terminal. 

Diez 


From R.Brodie at rl.ac.uk  Mon Jan  8 09:06:36 2007
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Mon, 8 Jan 2007 14:06:36 -0000
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk>
Message-ID: <entj5d$o4$1@south.jnrs.ja.net>


"Nick Maclaren" <nmm1 at cus.cam.ac.uk> wrote in message 
news:enthjb$p0l$1 at gemini.csx.cam.ac.uk...
>
> x = (1.234567890125, 1.2345678901255)
> print x
> print x[0], x[1]
>
>>>> (1.2345678901249999, 1.2345678901254999)
>>>> 1.23456789012 1.23456789013
>
> Is there a rational reason, or is that simply an artifact of the way
> that the code has evolved?  It is clearly not a bug :-)

print x[0] gives the same result as printing str(x[0]),
the value of x formatted as a string (rounded to a
sensible number of places).

x[0] at the command prompt gives the same result as
printing repr(x), the representation of the text value as
a string.

When you do print on a tuple it doesn't recursively
call str(), so you get the repr representations.

You can get similar results with anything where the
str() and repr() values are different.
e.g. x = ( u'a', u'b') 




From mail at microcorp.co.za  Tue Jan  9 02:13:37 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 9 Jan 2007 09:13:37 +0200
Subject: Bitwise expression
References: <enud98$960$1@ss408.t-com.hr>
Message-ID: <021a01c733c8$40684700$03000080@hendrik>

"Gigs_" <gigs at hi.t-com.hr> wrote:


> Can someone explain me bitwise expression?
> few examples for every expression will be nice
>
> x << y Left shift
> x >> y Right shift
> x & y Bitwise AND
> x | y Bitwise OR
> x ^ y Bitwise XOR (exclusive OR)
> ~x Bitwise negation

The short, and possibly weird, but true, answer is:

If you have to ask this question, you should avoid
using these things. - Think of them as "Advanced Magic"

But this is unhelpful, so a slightly longer answer is:

Computer memory is like a long string of flip-flops that can
take on one of two states - "on" or "True" represented normally by
a digit 1, and "off" or "False" - a digit 0.   Hence the term binary.

Binary means "two valued", just like a Bicycle has two wheels.

These flip-flops are the smallest element of memory, and one
of them is called a "bit".  The plural is "bits".  "plural" means
"more than one of".

Eight bits are called a Byte.
Half a Byte is a Nibble - four bits (sometimes spelt Nybble by
people who are trying to be cute).
There is a concept called a "Word" of memory which is ill defined.
Sometimes it is one or two Bytes, sometimes three nibbles, sometimes
four, eight or sixteen bytes - depends on the hardware's bus width.

No, I am not going to explain what a bus is.

You can think of a python number as a word of eight bytes long,
and a python string as a number of bytes of arbitrary length.

I am also not going to explain big and little endian representation.
Yahoo for it.

Now the logic operators, as applied to nibbles:

1110  <<  0111               - shifted left, filled with zero from right
                                        (multiply by two - seven to fourteen)
0010  >>  0100               - shifted right, filled with zero from left
                                        (divide by two - four to two)
0100  =    0101 & 1110   - true if both bits true, false otherwise
                                        (used for masking, clearing bits)
1101  =    0101  |  1100   - false if both bits false, true otherwise
                                        (True if either bit true - used to set
bits)
1001  =    0101  ^ 1100   - true if only one of the bits true, else false
                                        (anything xored with itself is all zero)
                                        (used to toggle bits, identity testing)
1001  ~    0110               - inversion "not"  - not true is false, not false
is true

Also yahoo for "Boolean algebra" and "De Morgan" and "IEEE floating point
representation"

hth - Hendrik




From richard at nospam.com  Mon Jan  8 16:47:41 2007
From: richard at nospam.com (Richard Townsend)
Date: Mon, 8 Jan 2007 21:47:41 +0000
Subject: Bitwise expression
References: <enud98$960$1@ss408.t-com.hr>
Message-ID: <1xe2u3rh89yyj.zuucb7yepvdj.dlg@40tude.net>

On Mon, 08 Jan 2007 22:32:12 +0100, Gigs_ wrote:

> Can someone explain me bitwise expression?
> few examples for every expression will be nice
> 

http://wiki.python.org/moin/BitwiseOperators


-- 
Richard


From smusnmrNOSPAM at yahoo.com  Fri Jan 12 04:15:30 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Fri, 12 Jan 2007 10:15:30 +0100
Subject: pygame and python 2.5
Message-ID: <eo7jji$61nu$1@zam602.zam.kfa-juelich.de>

Hi all,

when I rtry to install pygame (pygame-1.7.1release.win32-py2.4.exe, the most
ciurrent version I found) it requires Python 2.4! Will I really have to
uninstall my Python 2.5  and install the old Python 2.4 in order to use
pygame?

Thanks,

Siggi





From bthom at cs.hmc.edu  Fri Jan  5 00:57:22 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Thu, 04 Jan 2007 21:57:22 -0800
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <459DCC77.2030708@gmx.net>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<7.0.1.0.0.20070105004837.05b36d98@yahoo.com.ar>
	<459DCC77.2030708@gmx.net>
Message-ID: <103909CE-118D-428A-B865-46896785A30E@cs.hmc.edu>


On Jan 4, 2007, at 7:56 PM, Thomas Ploch wrote:

> Gabriel Genellina schrieb:
>> At Thursday 4/1/2007 23:52, jeremito wrote:
>>
>>> I am writing a class that is intended to be subclassed.  What is the
>>> proper way to indicate that a sub class must override a method?
>>
>> If any subclass *must* override a method, raise  
>> NotImplementedError in
>> the base class (apart from documenting how your class is supposed  
>> to be
>> used).
>>
>>
>
> I learn so much from this list. I didn't even know this error existed.

Me too.

I was looking for a definitive list of Python errors, although I  
realize some folks do things like:

class foo :
    def __init__() :
       <whatever>

    def bar() :
       abstract

class baz(foo) :
    def __init__() :
       <whatever>

    def bar() :
       <shomething useful>

This does what you want in that if baz's bar wasn't defined, calling  
this method on a baz instance would give some kind of "variable not  
found error."

I imagine the NotImplementedError is actually a defined object, but I  
really don't know.

So, back to my question: is a catalog of standard python errors  
available? I've looked on the python site but had no success.

Thanks,

--b



From rtw at freenet.co.uk  Fri Jan  5 05:09:03 2007
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Fri, 05 Jan 2007 04:09:03 -0600
Subject: where to find wx package
References: <enl7h1$49m$1@zam602.zam.kfa-juelich.de>
Message-ID: <Xns98AF674C4339FrtwfreenetREMOVEcouk@216.196.109.145>

siggi wrote in news:enl7h1$49m$1 at zam602.zam.kfa-juelich.de in
comp.lang.python: 

> Hi all,
> 
> a newbie question:
> 
> I have a program gui03A.py using wxPython, importing it such:
> "from wxPython.wx import *"
> 
> The program works, but I get the warning message:
> 
> "gui03A.py:4: DeprecationWarning: The wxPython compatibility package
> is no longer  automatically generated or activly maintained.  Please
> switch to the wx package  as soon as possible."
> 
> However, after extensive searching on www.python.org and Googling the
> web, I do not find any package with "wx" as its only name.
> 
> Where can I get the wx package (for win32 XP)?

The "wx package" talked about above is also part of WxPython,
so you have already got it. To import it use:

import wx

You will need to translate all (well most) identifiers in
your programme from wxBlah to wx.Blah so:

class MyFrame( wxFrame ):
  pass

becomes

class MyFrame( wx.Frame ):
  pass

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From gagsl-py at yahoo.com.ar  Sun Jan  7 13:40:49 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 10:40:49 -0800
Subject: Recommended way to force a thread context switch?
In-Reply-To: <mailman.2376.1168124545.32031.python-list@python.org>
References: <GzOnh.112$a81.91@nntpserver.swip.net>
	<1168103258.602286.146100@42g2000cwt.googlegroups.com>
	<1168104008.910681.46800@38g2000cwa.googlegroups.com>
	<mailman.2373.1168116439.32031.python-list@python.org>
	<Xns98B0D9B8ABB0Bduncanbooth@127.0.0.1>
	<mailman.2374.1168120599.32031.python-list@python.org>
	<Xns98B0E573D7097duncanbooth@127.0.0.1>
	<mailman.2376.1168124545.32031.python-list@python.org>
Message-ID: <1168195249.257166.322740@51g2000cwl.googlegroups.com>

On 6 ene, 20:01, Lloyd Zusman <l... at asfast.com> wrote:

> It seems that the original writer of the app had set this interval to a
> high value in a part of the code that I overlooked until you mentioned
> this right now.
>
> [...] once one of the big
> number-crunching threads gets control, it starves out the monitoring
> threads, which is not a good thing for my app ... or at least it did
> so with the original large checkinterval.

This is why such settings should be in a configuration file or in a
prominent place in the application...
I had a program where, deep in an unknown function, the original coder
changed the process priority - with no valid reason, and in any case,
that should be an application-level setting. It was hard to find why,
after doing such and such things, the system responsiveness were so
slow.

-- 
Gabriel Genellina



From wanjunfeng at gmail.com  Tue Jan 16 21:53:01 2007
From: wanjunfeng at gmail.com (Kevin Wan)
Date: 16 Jan 2007 18:53:01 -0800
Subject: I wrote a C++ code generator in Python,
	would anyone please help me to review the code? :)
In-Reply-To: <1168943577.936249.191040@s34g2000cwa.googlegroups.com>
References: <1168930067.970099.164620@s34g2000cwa.googlegroups.com>
	<1168943577.936249.191040@s34g2000cwa.googlegroups.com>
Message-ID: <1169002381.334281.218390@s34g2000cwa.googlegroups.com>

I'm writing the document for fgen. You can use SVN to access the most
updated files.

Basically you can use fgen --help to get the usage.

It's my c++ development tool, and I didn't spend that much time on
writing document. Sorry. But I'm writing now.

Thanks and waiting to work with you guys,
Kevin

Vineeth  Kashyap wrote:
> Hi,
> I am interested in your proposal. I am basically a C/C++ programmer,
> but recently fell in love with python. Please send more details on
> fgen. We could probably start working. :)
> Kevin Wan wrote:
> > fgen is a free command line tool that facilitates cross platform c++
> > development, including header generation, cpp file generation, makefile
> > generation, unit test framework generation, etc.
> >
> > http://sf.net/projects/fgen
> >
> > I'm not very familiar with Python. Any feedback are appreciated! Or
> > anyone like to develop it with me?
> > 
> > Thanks.



From gandalf at designaproduct.biz  Mon Jan 22 13:52:17 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Mon, 22 Jan 2007 19:52:17 +0100
Subject: closing a "forever" Server Socket
In-Reply-To: <1169488142.312711.322320@51g2000cwl.googlegroups.com>
References: <1169123381.930403.24170@38g2000cwa.googlegroups.com>	<1169143715.222186.30530@51g2000cwl.googlegroups.com>	<1169482385.253887.249030@51g2000cwl.googlegroups.com>	<mailman.2990.1169484872.32031.python-list@python.org>
	<1169488142.312711.322320@51g2000cwl.googlegroups.com>
Message-ID: <45B507E1.2000803@designaproduct.biz>

alessandro ?rta:
> Oh my God! it's really so complicated?
>
> 3 modules (threading, SocketServer, select) only for design a way to
> shutdown a TCP server????
> ...but they told me that python was easy... :)
>   
I believe that SockerServer was created for testing purposes, although 
there are some programs using it in production. Yes, Python is easy. The 
language is very clear, and you do not need to install third party 
modules in order to create a server. :-) Of course the easiest way is to 
call serve_forever. Isn't it easy? The other way is to implement your 
own message handling loop. The SocketServer is flexible enough to do 
this; and I don't think it is complicated. 7 lines of code will allow 
you to stop the server safely from anywhere, even from other threads. 
Try to implement the same in C or Delphi...
> but it doesen't work because the server remain alive...maybe
> SocketServer create immortal server...
> I need only to close my application, there is a way to force the server
> thread to close?
>   
In pure Python, no. Python threads are "cooperative". In other words, 
they cannot be terminated from outside. A thread will stop after the 
execution exits its "run" method. (You can, of course terminate the 
tread with an operating system function, but it is not recommended.)


Here is a class that can be stopped with an event:

import threading

stop_requested = threading.Event()

class SoftWaitThread(threading.Thread):
    """SoftWaitThread can wait for a given time except if the thread was 
asked
        to terminate itself."""
    def waitsome(self,amount=10):
        """Wait the specified amount of time.

        This can be terminated by stop_requested within 0.1 seconds."""
        for idx in range(int(10*amount)):
            time.sleep(0.1)
            if stop_requested.isSet():
                break


Then you can do this:

class MyServerThread(SoftWaitThread):
    def run(self):
       server = MySocketServerClass()
       srvfd = server.fileno()
       while not stop_requested.isSet():
          ready = select.select([srvfd], [], [], 1)
          if srvfd in ready[0]:

        server.handle_request()
     else:
        pass

      
And then:

import time
def main():
    sth = MyServerThread() # Create your thread
    sth.start() # Start handling requests in another thread
    try:  
        time.sleep(TIMEOUT_IN_SECONDS)  # Wait...
    finally:
        stop_requested.set() # Request the server thread to stop itself
        sth.join() # Wait until the server thread stops
    print "Stopped."

You could start several threads and request them to stop with the same 
event. I hope this helps.

   Laszlo


p.s.: Not all of the above was tested, be careful.



From bearophileHUGS at lycos.com  Sun Jan  7 08:22:57 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 7 Jan 2007 05:22:57 -0800
Subject: I want to learn
In-Reply-To: <1168174097.252001.71130@s80g2000cwa.googlegroups.com>
References: <1168174097.252001.71130@s80g2000cwa.googlegroups.com>
Message-ID: <1168176177.793184.122250@v33g2000cwv.googlegroups.com>

joeyslistings at yahoo.com:
> I am looking for a python guru who has instant messenger or gtalk or
> whatever who can meet me
> online in the mornings, give me some direction for the day and then
> answer some questions here and there online throughout the day.

Maybe a Python gury isn't necessary, maybe a person that know the
language enough may be enough.

Bye,
bearophile



From stou.sandalski at gmail.com  Fri Jan 19 02:59:54 2007
From: stou.sandalski at gmail.com (Stou Sandalski)
Date: 18 Jan 2007 23:59:54 -0800
Subject: Pass 'this' to a python script in an extended application
References: <1169165539.529443.289120@v45g2000cwv.googlegroups.com>
Message-ID: <1169193594.727868.39160@s34g2000cwa.googlegroups.com>

I figured it out.  I just made my main class a singleton and it worked
fine... it always works right after I post a message =)

Stou

Stou Sandalski wrote:
> Hi,
>
> I have an application consisting of a main C++ class (and other
> classes) stored inside a DLL.  The application uses a small main
> executable that links against the main DLL, then initializes and runs
> the core class.  The python bindings are inside a .pyd module that also
> links against the core DLL file.  I was able to generate the python
> bindings against the core class using SWIG.   The application can now
> be run either by the bootstrap executable or through the python console
> like:
>
> import foo
> s = foo.MainClass()
> s.run();
>
> This is awesome, however I want to be able to launch python scripts
> from within the application itself (no matter how it was started) and
> supply these scripts with a "pointer" to the already initialized main
> Class something like:
>
> import foo
>
> s = foo.GetMainClass()
> s.someMethod().
>
> I found this:
>
> http://docs.python.org/ext/extending-with-embedding.html
>
> but the problem is that I don't know how to "give" the python
> interpreter a "pointer" to my class that will be compatible with the
> already defined bindings that SWIG generated.  I am trying to keep the
> core application dll from knowing about the .pyd extension module.
>
> I apologize if this post belongs in a group dedicated to SWIG.
> 
> Stou



From gagsl-py at yahoo.com.ar  Fri Jan  5 10:16:26 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 05 Jan 2007 12:16:26 -0300
Subject: bug in copy.deepcopy or in getattr or in my understanding?
In-Reply-To: <1168005716.195293.121490@38g2000cwa.googlegroups.com>
References: <1167942359.246311.80700@s34g2000cwa.googlegroups.com>
	<mailman.2301.1167966549.32031.python-list@python.org>
	<1168005716.195293.121490@38g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070105120717.05ce0ef8@yahoo.com.ar>

At Friday 5/1/2007 11:01, Emin wrote:

>Thank you for your reply. As you guessed, I want to be able to select
>the method at runtime as in your final example, but when I tried your
>suggestion I got the same error (see below). I think the problem is
>that getattr is donig something different than in my example where I
>explicitly get it from the dict (see the very end of the transcript
>below):

I've modified it as follows:
- using new.instancemethod to create the dynamic method
- copy uses __getstate__ to determine what is needed to copy/save. 
Assuming that self.x is derived from other attributes, it's not 
actually needed in the saved state, and can be omited.
- __setstate__ does the inverse: after reconstructing the object 
state, sets self.x to the right value

=== cut ===
import new

class A:
     def foo(self, arg):
         print "in foo, self=%r arg=%r" % (self, arg)

class B(A):
     def __init__(self):
         self.update_dynamic_methods()

     def update_dynamic_methods(self):
         "Should assign the dynamic methods based on other attributes"
         self.x = new.instancemethod(getattr(A,"foo"),self,B)

     def __getstate__(self):
         state = self.__dict__.copy()
         if 'x' in state: del state['x']
         return state

     def __setstate__(self, state):
         self.__dict__.update(state)
         self.update_dynamic_methods()

b=B()
b.something = 'something'
b.foo(123)
b.x(123)

import copy
b2 = copy.deepcopy(b)
assert b2.something=='something'
b2.foo(123)
b2.x(123)
=== cut ===

-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From klaus at seistrup.dk  Sun Jan 28 05:26:57 2007
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Sun, 28 Jan 2007 10:26:57 +0000 (UTC)
Subject: IP address
References: <mailman.3244.1169978684.32031.python-list@python.org>
Message-ID: <ephtph$fcl$1@minji.szn.dk>

Scripter47 wrote:

> How do i get my ip address?
>
> in cmd.exe i just type "ipconfig" then it prints:
>       ...
>       IP-address . . . . . . . . . . . . . . . . . : 192.168.1.10
>       ...
> how can i do that in python??

#v+

python -c 'import re, urllib; print re.findall("<title>Your IP: (.+?)</title>", urllib.urlopen("http://myip.dk/").read())[0]'

#v-

Cheers,

-- 
Klaus Alexander Seistrup
http://klaus.seistrup.dk/



From noway at ask.me  Wed Jan 24 09:00:49 2007
From: noway at ask.me (Giovanni Bajo)
Date: Wed, 24 Jan 2007 15:00:49 +0100
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <45b69f63$0$24463$88260bb3@free.teranews.com>
References: <ep60jp$63v$1@aioe.org> <ep64ic$epi$1@aioe.org>
	<45b69f63$0$24463$88260bb3@free.teranews.com>
Message-ID: <mEJth.20273$bH4.2768@tornado.fastwebnet.it>

On 24/01/2007 1.45, Joshua J. Kugler wrote:

>> I've downloaded both the wxPython and the PyQt4 package, and by the
>> first impression I must say that the PyQt4 system had a very
>> compelling presentation. From what I can understand from the feedback
>> I've gotten so far is that the wxPython is a better choice when it
>> comes to compability (with linux), and it's free even if I want to
>> create applications and sell them.
>> So, from what I understand I will have to go with PyQt4 since (from
>> my understanding):
>> 1. I will not sell the applications I'm working with since they will
>> only be used by the internal QA at a computer game company.
> 
> Even that is getting on shaky ground, at least according to Troll Tech. 
> See: http://www.trolltech.com/developer/knowledgebase/190/  So, write it
> for internal use, and put up for distribution on your personal web site
> (pending company approval, of course).

That page is legal babble, trying to trick you into buying (or making your 
boss buy) a commercial license. The Qt Open Source edition *IS* GPL and thus 
it falls under all the normal GPL clauses and uses, irrespective of what 
Trolltech may or may not think.

For instance, see this FAQ:
http://www.gnu.org/licenses/gpl-faq.html#GPLRequireSourcePostedPublic

which makes pretty clear that a "company"/"organization" is basically the same 
of an "individual". "Releasing a software within a company for internal usage" 
is by no means the same of "releasing it to the public". Basically, for what 
the GPL is concerned, it is *not* a "release" or a "distribution" at all.

Thus, it is well possible to write internal GPL software, using the Qt Open 
Source library, and to release/distribute/use it *ONLY* internally. Also, it 
should be made clear that a company can of course relicense its own 
proprietary libraries as GPL for internal usage only, so that they can be 
linked to other GPL libraries "legally". For instance, in the case of Daniel 
and his game company, they can link their proprietary game code to PyQt4 (Open 
source edition) to produce an internal tool, like a level editor, which would 
then fall under the GPL. If and only if they were to release that tool to the 
public (either for free or for sale), they would have to either go GPL and 
release full source code (include the parts of their game code linked to it), 
or buy a Qt commercial license.

[[ Another page of similar babble is the one where they try to convince you 
that you cannot use the Qt Open Source edition to develop a software, and then 
buy the commercial edition only the day before you want to release it as non 
open-source. I can't even understand how they can even try to support such a 
nonsense position. You're free to develop your software for years as GPL 
without distributing it, and then relicense your own code whenever you want. 
They're obviously just trying to scare people. ]]
-- 
Giovanni Bajo


From skip at pobox.com  Wed Jan 17 16:49:44 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 17 Jan 2007 15:49:44 -0600
Subject: Would a Dutch speaker please check this wiki page please?
Message-ID: <17838.39416.809225.736074@montanaro.dyndns.org>

Got a note about a new page on the Python Wiki:

>>>>> "Wade" == Wade McDaniel <wmcdaniel at wolfgangsvault.com> writes:

    http://wiki.python.org/moin/Selcuk_Altun

I suspect it's junk since it doesn't seem to mention Python and the website
it mentions doesn't seem to exist.  Still, just in case...

Thx,

Skip


From wccppp at gmail.com  Thu Jan  4 12:32:02 2007
From: wccppp at gmail.com (wcc)
Date: 4 Jan 2007 09:32:02 -0800
Subject: where to ask questions related to comtypes?
In-Reply-To: <mailman.2279.1167902106.32031.python-list@python.org>
References: <1167891509.842292.125420@i80g2000cwc.googlegroups.com>
	<mailman.2279.1167902106.32031.python-list@python.org>
Message-ID: <1167931922.412066.27630@i15g2000cwa.googlegroups.com>

Thank you Thomas.

On Jan 3, 11:10 pm, Thomas Heller <thel... at ctypes.org> wrote:
> wcc schrieb:
>
> > Hello group,
>
> > Is there a separate mailing list for comtypes? Or this is the
> > appropriate place to post questions related to this package(from Thomas
> > Heller)?It seems the python-win32 mailing list is the place where the most COM knowledge
> is, so that would be most appropriate.  Other places are *this* list or the
> ctypes-users lists (since comtypes is based on ctypes).
> 
> Thomas



From pavlovevidence at gmail.com  Sat Jan 13 19:05:40 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 13 Jan 2007 16:05:40 -0800
Subject: Threaded for loop
In-Reply-To: <aObqh.9529$pQ3.5564@newsread4.news.pas.earthlink.net>
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
	<aObqh.9529$pQ3.5564@newsread4.news.pas.earthlink.net>
Message-ID: <1168733139.935538.118500@38g2000cwa.googlegroups.com>


Dennis Lee Bieber wrote:
> On 13 Jan 2007 12:15:44 -0800, "John" <weekender_ny at yahoo.com> declaimed
> the following in comp.lang.python:
>
> >
> > I want to do something like this:
> >
> > for i = 1 in range(0,N):
> >  for j = 1 in range(0,N):
> >    D[i][j] = calculate(i,j)
> >
> > I would like to now do this using a fixed number of threads, say 10
> > threads.
> > What is the easiest way to do the "parfor" in python?
> >
> > Thanks in advance for your help,
> > --j
>
> 	Don't know if it's the easiest -- and if "calculate" is a CPU-bound
> number cruncher with no I/O or other OS-blocking calls, it won't be
> faster either as the GIL will only let one run at a time, even on
> multi-core processors.

It could still be helpful if you'd like to get as much done as possible
in as short a time as possible, and you suspect that one or two cases
are likely to hold everything up.


Carl Banks



From usenet200701 at tobyinkster.co.uk  Sun Jan 28 09:15:27 2007
From: usenet200701 at tobyinkster.co.uk (Toby A Inkster)
Date: Sun, 28 Jan 2007 14:15:27 +0000
Subject: Commandline wrapper: help needed
References: <45bb7527$0$20806$5fc30a8@news.tiscali.it>
Message-ID: <vonu84-b0l.ln1@ophelia.g5n.co.uk>

Toby wrote:

> Any idea how to improve the script and solve this problem?

Hello Toby, excellent name you have there. What advantage (if any) does
this method have over standard UNIX-style pipes?

-- 
Toby A Inkster BSc (Hons) ARCS
Contact Me  ~ http://tobyinkster.co.uk/contact


From tsuraan at gmail.com  Mon Jan  8 10:41:23 2007
From: tsuraan at gmail.com (tsuraan)
Date: Mon, 8 Jan 2007 09:41:23 -0600
Subject: Suitability for long-running text processing?
Message-ID: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>

I have a pair of python programs that parse and index files on my computer
to make them searchable.  The problem that I have is that they continually
grow until my system is out of memory, and then things get ugly.  I
remember, when I was first learning python, reading that the python
interpreter doesn't gc small strings, but I assumed that was outdated and
sort of forgot about it.  Unfortunately, it seems this is still the case.  A
sample program (to type/copy and paste into the python REPL):

a=[]
for i in xrange(33,127):
 for j in xrange(33,127):
  for k in xrange(33,127):
   for l in xrange(33, 127):
    a.append(chr(i)+chr(j)+chr(k)+chr(l))

del(a)
import gc
gc.collect()

The loop is deep enough that I always interrupt it once python's size is
around 250 MB.  Once the gc.collect() call is finished, python's size has
not changed a bit.  Even though there are no locals, no references at all to
all the strings that were created, python will not reduce its size.  This
example is obviously artificial, but I am getting the exact same behaviour
in my real programs.  Is there some way to convince python to get rid of all
the data that is no longer referenced, or do I need to use a different
language?

This has been tried under python 2.4.3 in gentoo linux and python 2.3 under
OS X.3.  Any suggestions/work arounds would be much appreciated.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070108/bbd7fa2c/attachment.html>

From tim.one at comcast.net  Wed Jan  3 12:48:48 2007
From: tim.one at comcast.net (Tim Peters)
Date: Wed, 03 Jan 2007 11:48:48 -0600
Subject: a question on python dict
References: <Xns98AA4BE8CF35Ctim111one@216.196.97.136>
	<mailman.2240.1167835429.32031.python-list@python.org>
Message-ID: <Xns98AD82575F0ECtim111one@216.196.97.136>

[Tim Peters]
>> ...
>> Taking my response out of context to begin with doesn't really change
>> that I answered the question he asked ;-)

[Fredrik Lundh]
> welcome to comp.lang.python.
> 
> </F> 

Thanks for the welcome!  It's tough to be a newbie here ;-)


From tiedon_jano at hotmail.com  Mon Jan  8 04:09:23 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Mon, 08 Jan 2007 09:09:23 GMT
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <QWkoh.14891$sR.3880@newssvr29.news.prodigy.net>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
	<mailman.2332.1168016502.32031.python-list@python.org>
	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>
	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>
	<yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>
	<mailman.2367.1168100759.32031.python-list@python.org>
	<fK_nh.25689$QU1.17301@newssvr22.news.prodigy.net>
	<w03oh.46$_k2.22@read3.inet.fi>
	<P69oh.32493$Gr2.29258@newssvr21.news.prodigy.net>
	<1168194009.220437.286210@q40g2000cwq.googlegroups.com>
	<nKboh.11774$ZT3.8998@newssvr19.news.prodigy.com>
	<1168198159.798783.168010@i15g2000cwa.googlegroups.com>
	<QWkoh.14891$sR.3880@newssvr29.news.prodigy.net>
Message-ID: <7Tnoh.62$cQ2.11@read3.inet.fi>

W. Watson kirjoitti:
> Gabriel Genellina wrote:
>> On 7 ene, 16:20, "W. Watson" <wolf_tra... at invalid.com> wrote:
>>
>>> We seem to be looping. I have the Python interpreter. I would like the
>>> pythonwin editor. The download link doesn't work on SourceForge. 
>>> Where can I
>>> get it? If not there, where? If it can't be obtained, then I'll go to 
>>> the
>>> default editor built into python-2.5.msi.
>>
>> It *does* work for me. Try
>> https://sourceforge.net/project/showfiles.php?group_id=78018&package_id=79063 
>>
>>
> I can easily see the page you refer to, but where's the pythonwin editor?
> 
> 
>          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
>              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
>               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet
> 
>                 A road sign along many highways reads, "$1000
>                 fine for littering" I have yet to find any
>                 $1000 bills. WTW

The editor is only a part of pywin32, which is a handy package to do all 
kinds of Windows only stuff with Python. So download and install pywin32 
to get the editor and all that other nice stuff.

HTH,
Jussi


From S.Mientki-nospam at mailbox.kun.nl  Fri Jan  5 14:09:47 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Fri, 05 Jan 2007 20:09:47 +0100
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
Message-ID: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>

Not sure I wrote the subject line correct,
but the examples might explain if not clear


*** first attempt ***
class pin:
   def __init__ (self):
     self.Name  = 'Unknown Pin'

aap = pin()             # create an instance
aap.Name = 'aap'        # set it's name
print aap.Name          # print it's name
			# but why should I set it's name ??
print 'aap'		# I can just as well print a constant string !!
                         # (ok there will be an extra check)


*** second attempt ***
class pin2:
   def __init__ (self, naam):
     self.Name  = naam

aap2 = pin2('aap2')     # seems completely redundant to me.
print aap2.Name
print 'aap2'


Can this be achieved without redundancy ?

thanks,
Stef Mientki


From paul at boddie.org.uk  Fri Jan 12 13:23:41 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 12 Jan 2007 10:23:41 -0800
Subject: parsing a file name
References: <1168622211.188972.179680@38g2000cwa.googlegroups.com>
	<mailman.2656.1168625795.32031.python-list@python.org>
Message-ID: <1168626221.581533.128750@s34g2000cwa.googlegroups.com>

Chris Mellon wrote:
>
> I'm trying to think of a good reason to extract the version from the
> filename instead of using RPM to get the real version from the
> metadata and I can't come up with one.

The inquirer doesn't have any RPM handling tools installed/available or
is dealing with a lot of versioned filenames which might be a selection
of different, arbitrary formats.

Try harder! ;-)

Paul



From larry.bates at websafe.com  Tue Jan 30 19:03:44 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 30 Jan 2007 18:03:44 -0600
Subject: DCOP memory leak?
In-Reply-To: <1170193025.867274.242350@m58g2000cwm.googlegroups.com>
References: <1170193025.867274.242350@m58g2000cwm.googlegroups.com>
Message-ID: <qsqdnaZ8iZ52QSLYnZ2dnUVZ_o2vnZ2d@comcast.com>

TimDGCB at gmail.com wrote:
> Hello,
> 
> I'm writing a python script for Amarok, I communicate with Amarok 
> using DCOP.
> Now, I have to call DCOP very often and I noticed that every time I 
> make a DCOP call my program keeps growing in memory size.
> 
> To make sure it was DCOP i wrote the small program below:
> 
> from dcopext import DCOPClient, DCOPApp
> 
> while 0==0:
>     dcop=DCOPClient()
>     dcop.attach()
>     AmarokDcopRes = DCOPApp ("amarok", dcop)
>     ok, Ms = AmarokDcopRes.player.trackCurrentTimeMs()
>     print Ms
> 
> If you run this script and monitor it's memory use you'll see that it 
> keeps growing.
> 
> Does anyone know how I can solve this problem?
> 
> Kind regards,
> 
> Tim
> 

I think you will find the objects are getting created so fast that
garbage collection doesn't have time to clean them up as fast
as you are creating new ones.  Since del dcop is not guaranteed
to be "immediate" that won't help.

Q: Can't you create dcop instance outside the loop and reuse it
for every time through the loop?

Q: Can you sleep or something after each loop or do you really
want to peg the CPU checking forever?

Q: How do you ever get out of this infinite loop?
Note: while 0=0 is better written as while 1: and you need a
break somewhere to get out of the loop.

-Larry



From nogradi at gmail.com  Wed Jan 31 12:59:26 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Wed, 31 Jan 2007 18:59:26 +0100
Subject: subway
In-Reply-To: <17856.50898.477998.112022@montanaro.dyndns.org>
References: <5f56302b0701310802y7e45c98fmaaebe090e34d410@mail.gmail.com>
	<17856.50898.477998.112022@montanaro.dyndns.org>
Message-ID: <5f56302b0701310959o424ab298jac4b21fb38b20a99@mail.gmail.com>

>     Daniel> Does anyone know what has happened to the codebase of the subway
>     Daniel> project? It seems the whole project has been shut down leaving
>     Daniel> no trace of the code on net but I would be very happy to see it,
>     Daniel> apparently it had some cool features that would be fun to look
>     Daniel> at.  Does anyone have access to the code and/or is willing to
>     Daniel> make it publically available?
>
> No guarantee that it will have any remnants of the subway project, but the
> Wayback Machine might be a good place to start:
>
>     http://web.archive.org/web/*/http://subway.python-hosting.com

Thanks, that's a great idea, actually loads of stuff are on it, but
somehow from the link

http://web.archive.org/web/20060206044039/http://www.gosubway.org/install/Subway-0.2rc1-py2.4.egg

the egg file can not be downloaded completely, the connection is
closed at byte 138903 all the time and the file is bigger than that.
If anyone managed to grab the file please let me know so far I tried
wget and firefox.


From metaperl at gmail.com  Wed Jan 24 14:51:27 2007
From: metaperl at gmail.com (metaperl)
Date: 24 Jan 2007 11:51:27 -0800
Subject: Re-thinking my if-thens - a software engineering question
Message-ID: <1169668287.517657.24450@l53g2000cwa.googlegroups.com>

Ok, I have a module called textgen.py. The point of this module is to
generate a csv file from an array of dictionaries. As I iterate through
each dictionary, I "massage" the dictionary values before writing them
out to csv. Now, for one dictionary entry, I have the following code:

            if dict_key == 'PCN':
		fields = dict_val.split("/")
                mo = re.match( '(\w{2})(\d{2})(\d{2})' , fields[1] )
		if mo:
		    dict_val = "%s/%s%s/%s" % (fields[0], mo.group(1), mo.group(3),
fields[2][1:])
		else:
		    dict_val = dict_val

Ok, so now here is what has happened. This code was based on the
assumption that dict_val would have 2 forward slashes in it. It turns
out that I need to follow a different process of massaging when no
slashes are present. A naive solution would be something like:

if dict_key == 'PCN':
                    fields = dict_val.split("/")
                    if fields == 3:
                        dict_val = pcn_three(fields) # where pcn_three
is the code above
                else:
                    # new logic

But I am wondering if I should abstract the flow of control into a
class or something.

Ideas welcome.



From jgodoy at gmail.com  Fri Jan 19 19:28:03 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Fri, 19 Jan 2007 22:28:03 -0200
Subject: OT Annoying Habits
References: <mailman.2917.1169243036.32031.python-list@python.org>
Message-ID: <874pqmwnho.fsf@gmail.com>

"Carroll, Barry" <Barry.Carroll at psc.com> writes:

> Secondly, can someone point me to the Standard Usenet Convention that
> mandates against top-posting.  This is not sarcasm; I would really like

You can read RFC 1855.  Section 3.1.3 talks about newsgroups.  

Section 3.1.1 has general guidelines and it includes this:

        If you are sending a reply to a message or a posting be sure you
        summarize the original at the top of the message, or include just
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        enough text of the original to give a context. This will make sure
        readers understand when they start to read your response. Since
        NetNews, especially, is proliferated by distributing the postings from
        one host to another, it is possible to see a response to a message
        before seeing the original. Giving context helps everyone. But do not
        include the entire original. 


I've added the "^" to mark the part where it says what should be on the top of
the message.

You can check it: http://www.dtcc.edu/cs/rfc1855.html


Be seeing you,
-- 
Jorge Godoy      <jgodoy at gmail.com>


From karoly.kiripolszky at gmail.com  Sun Jan 28 07:52:40 2007
From: karoly.kiripolszky at gmail.com (karoly.kiripolszky at gmail.com)
Date: 28 Jan 2007 04:52:40 -0800
Subject: binary for osx needed
Message-ID: <1169988760.823656.39710@v45g2000cwv.googlegroups.com>

helo ppl!

i wrote a small mp3 streaming server called "csikk" in python using 
basehttpserver.
you can give it a try if you wish:

http://code.google.com/p/csikk/

actually i need help in compiling an osx binary for my app, cause i 
don't own a mac. i wonder if anyone could help me.

thanks in advance!



From nospam at riddergarn.dk  Mon Jan 29 15:04:47 2007
From: nospam at riddergarn.dk (Scripter47)
Date: Mon, 29 Jan 2007 21:04:47 +0100
Subject: SQL connecting
In-Reply-To: <L9svh.1239$zH1.840@newssvr29.news.prodigy.net>
References: <mailman.3275.1170098134.32031.python-list@python.org>
	<L9svh.1239$zH1.840@newssvr29.news.prodigy.net>
Message-ID: <45BE535F.90904@riddergarn.dk>

John Nagle skrev:
> Scripter47 wrote:
>> Hey
>>
>> It got a problem with python to connect to my SQL DBs, that's installed
>> on my apache server. how do i connect to sql? Gettting data? Insert into 
>> it?
> 
>     You need a third-party open source package called "MySQLdb".
> 
> 					John Nagle
Yeah look great but im using python 2.5, and it only support 2.3-2.4 :(, 
but thanks :)

Any better solutions :)



From mohan.us2010 at gmail.com  Tue Jan  9 09:15:08 2007
From: mohan.us2010 at gmail.com (mohan)
Date: 9 Jan 2007 06:15:08 -0800
Subject: Using with CSV library in Python 2.2!!!
In-Reply-To: <mailman.2481.1168351180.32031.python-list@python.org>
References: <1168348224.843657.27330@42g2000cwt.googlegroups.com>
	<mailman.2481.1168351180.32031.python-list@python.org>
Message-ID: <1168352108.295247.280690@51g2000cwl.googlegroups.com>


skip at pobox.com wrote:
> mohan> 1. Does Python 2.2 come with CSV library module or not? If yes,
>     mohan>    have I lost it somewhere??
>
> As the docs for the csv module indicate, it was new in 2.3.
>
>     mohan> 2. If Python 2.2 does not come with CSV module, is it possible to
>     mohan>    add the csv module to the Python root and start working??
>
> You might find that it will work with 2.2, though you might have to make
> some source code changes to _csv.c to get it to compile.
>
>     mohan> 3. If yes, where do I get this module from??
>
> You can get both csv.py and _csv.c via ViewCVS:
>
>     http://svn.python.org/view/*checkout*/python/tags/r236/Modules/_csv.c?content-type=text%2Fplain&rev=52574
>     http://svn.python.org/view/*checkout*/python/tags/r236/Lib/csv.py?content-type=text%2Fplain&rev=52574
>
> Skip

Hi Skip,

Thanks man. What kind of source code changes should I do to "_csv.c"
file , have you any idea on that too??

Otherwise upgrading to Python 2.4 would be the easiest choice.

Thanks again.

cheers,
Mohan.



From tgrav at mac.com  Thu Jan 11 09:12:25 2007
From: tgrav at mac.com (Tommy Grav)
Date: Thu, 11 Jan 2007 09:12:25 -0500
Subject: Progress count in terminal (Mac OS X)
Message-ID: <9079A3B8-47A8-495A-BFAE-09A603CFB819@mac.com>

I have a program that does a lot of iterations and would like
to follow its progress by having it print out the current iteration
number as it progresses. How do I do this so that it appears
like a counter that increases in the same place in the terminal
window? I am using python2.5 on a Mac OSX and its terminal
tcsh window.

Cheers
    Tommy


From sturlamolden at yahoo.no  Sun Jan  7 11:47:07 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 7 Jan 2007 08:47:07 -0800
Subject: Why less emphasis on private data?
In-Reply-To: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
Message-ID: <1168188427.144219.206490@s80g2000cwa.googlegroups.com>


time.swift at gmail.com wrote:
> Coming from a C++ / C# background, the lack of emphasis on private data
> seems weird to me. I've often found wrapping private data useful to
> prevent bugs and enforce error checking..
>
> It appears to me (perhaps wrongly) that Python prefers to leave class
> data public.  What is the logic behind that choice?

The designers of Java, C++, C#, Ada95, Delphi, etc. seem to think that
if an object's 'internal' variables or states cannot be kept private,
programmers get an irresistible temptation to mess with them in
malicious ways. But if you are that stupid, should you be programming
in any language? The most widely used language is still C, and there is
no concept of private data in C either, nor is it needed.

As mentioned in other replies, it is not rocket science to access a
class private data. In C++ you can cast to void*, in Java and C# you
can use reflection. C++ is said to be an "unsafe" language because
programmers can, using a few tricks, mess with the vtables. But how
many really do that?

In Python variables are kept in strict namespaces. You can ask the
compiler to name mangle a variable by prepending underscores. The
variable then becomes just as 'private' as a C++ private variable,
because as previously mentioned, 'private' variables in C++ can be
accessed through a cast to void*.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Jan 11 12:24:33 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 11 Jan 2007 18:24:33 +0100
Subject: Read from database, write to another database, simultaneously
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
	<50l9dlF1fuc1sU1@mid.individual.net>
	<eo4sor$du4$1@upsn250.cri.u-psud.fr>
Message-ID: <50na6hF1g30l4U4@mid.individual.net>

Laurent Pointal wrote:

> Not so sure, there is low CPU in the Python script,

Yes.

> but there may be CPU+disk activity on the database sides [with
> cache management and other optimizations on disk access].

That's it. So data queues up on the database side and you won't get
much value from faked concurrency with CPU cycles.

> So, with a reader thread and a writer thread, he can have a select
> on a database performed in parallel with an insert on the other
> database.

Explain. Remember, threads aren't really working concurrently. Even
on a multiprocessor machine you have constraints for IO traffic.
(And the GIL exists too)

> But, if its only a do-once job, maybe the optimization is net
> really necessary.

I still don't understand how threads would help optimizing a task
that largely depends on IO and will probably be executed on one
CPU.

Regards,


Bj?rn

-- 
BOFH excuse #14:

sounds like a Windows problem, try calling Microsoft support



From paul at boddie.org.uk  Mon Jan  8 04:24:04 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 8 Jan 2007 01:24:04 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
	<7xd55rzke9.fsf@ruckus.brouhaha.com>
	<slrneq2055.tcj.grahn+nntp@frailea.sa.invalid>
	<mailman.2388.1168181437.32031.python-list@python.org>
	<7x3b6mzwkl.fsf@ruckus.brouhaha.com>
	<1168189375.843789.306180@51g2000cwl.googlegroups.com>
	<7xps9q19wf.fsf@ruckus.brouhaha.com>
Message-ID: <1168248244.134804.138050@51g2000cwl.googlegroups.com>

Paul Rubin wrote:
>
> Right, the problem is if those methods start changing the "private"
> variable.  I should have been more explicit about that.
>
> class A:
>    def __init__(self):
>       self.__x = 3
>    def foo(self):
>       return self.__x
>
> class B(A): pass
>
> class A(B):
>    def bar(self):
>      self.__x = 5   # clobbers private variable of earlier class named A

Has this ever been reported as a bug in Python? I could imagine more
sophisticated "name mangling": something to do with the identity of the
class might be sufficient, although that would make the tolerated
"subversive" access to private attributes rather difficult.

Paul



From pjmlp at progtools.org  Fri Jan 12 04:12:13 2007
From: pjmlp at progtools.org (Paulo Pinto)
Date: Fri, 12 Jan 2007 09:12:13 GMT
Subject: What happened to SPE?
References: <RWsph.46007$Nb2.875778@news1.nokia.com>
	<slrneqco2b.vc.horpner@FIAD06.norwich.edu>
Message-ID: <NhIph.46298$_k2.852225@news2.nokia.com>

Hi,

Thanks for the feedback.
Paulo 




From cjw at sympatico.ca  Fri Jan 26 08:27:59 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 26 Jan 2007 08:27:59 -0500
Subject: stop script w/o exiting interpreter
In-Reply-To: <Lyauh.8689$QE6.2176@trnddc02>
References: <Lyauh.8689$QE6.2176@trnddc02>
Message-ID: <epcvl3$6bs$1@sea.gmane.org>

Alan Isaac wrote:
> I'm fairly new to Python and I've lately been running a script at
> the interpreter while working on it.  Sometimes I only want to
> run the first quarter or half etc.  What is the "good" way to do this?
> 
> Possible ugly hacks include:
> 
> - stick an undefined name at the desired stop point
> - comment out the last half
> 
> I do not like these and assume that I have overlooked the obvious.
> 
> Thanks,
> Alan Isaac
> 
> 
Alan,

If you are using Windows, you might consider PyScripter.
            http://mmm-experts.com/Products.aspx?ProductId=4

Colin W.



From robert.kern at gmail.com  Sat Jan  6 18:46:17 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 06 Jan 2007 17:46:17 -0600
Subject: c# application calling Scipy
In-Reply-To: <1168108637.270801.155950@42g2000cwt.googlegroups.com>
References: <1168108637.270801.155950@42g2000cwt.googlegroups.com>
Message-ID: <enpcce$gj0$1@sea.gmane.org>

dongarbage at hotmail.com wrote:
> Hi,
> 
> Novice here. :)
> 
> I'm building a c# application and I want to call functions in SciPy
> from that application.
> 
> What's the best way to call SciPy methods from a C# program?
> 
> Is there a best Python implementation for this? Ironython? Python for
> .NET? Enthought?

scipy is a package with many C and FORTRAN extensions, so IronPython won't work
unless someone has figured out a magic way to compile them. The Enthought
distribution (disclosure: I work for Enthought) is just a bundling of the normal
python.org distribution of Python with a bunch of packages; it knows nothing
about C#. I know little about Python for .NET beyond its README, but it does
seem to be able to embed CPython into a C# application and with some elbow
grease, that might work for you.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From vodel at hrz.tu-chemnitz.de  Fri Jan  5 07:19:18 2007
From: vodel at hrz.tu-chemnitz.de (Matthias Vodel)
Date: Fri, 5 Jan 2007 13:19:18 +0100
Subject: Change coords of a canvas.line item
Message-ID: <enlfps$aka$1@anderson.hrz.tu-chemnitz.de>

Hi all,

I want to change the beginning/end-coordinates of a canvas.line item.

Something like:

self.myCanvas.itemconfigure(item_id, coords=(x1_new, y1_new, x2_new, 
y2_new))

I don't want to delete and repaint a new line item. Is this possible?

Thanks

Matthias 



From fredrik at pythonware.com  Thu Jan 11 09:22:07 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 11 Jan 2007 15:22:07 +0100
Subject: Progress count in terminal (Mac OS X)
References: <9079A3B8-47A8-495A-BFAE-09A603CFB819@mac.com>
Message-ID: <eo5h6f$lsu$1@sea.gmane.org>

Tommy Grav <tgrav at mac.com>:

>I have a program that does a lot of iterations and would like
> to follow its progress by having it print out the current iteration
> number as it progresses. How do I do this so that it appears
> like a counter that increases in the same place in the terminal
> window? I am using python2.5 on a Mac OSX and its terminal
> tcsh window.

print a carriage return before, and no line feed after, each line:

    for i in range(100):
        print "\r" + "count", i,
    print # done

</F> 





From salvatore.difazio at gmail.com  Tue Jan 16 08:58:46 2007
From: salvatore.difazio at gmail.com (Salvatore Di Fazio)
Date: 16 Jan 2007 05:58:46 -0800
Subject: Watch log
In-Reply-To: <mailman.2764.1168919257.32031.python-list@python.org>
References: <1168892415.324184.273210@l53g2000cwa.googlegroups.com>
	<512astF1i9fgbU1@mid.individual.net>
	<1168897765.370442.201660@51g2000cwl.googlegroups.com>
	<mailman.2764.1168919257.32031.python-list@python.org>
Message-ID: <1168955926.261983.97320@51g2000cwl.googlegroups.com>

Thinker ha scritto:

> What you want is something like 'tail -f' in linux.
> If you look into it's source code, you will find it check file periodically.
> When a read() reach the end of the file, read() will return a empty string.
> You can try to read data from the file periodically after a EOF.
> I think it is what you want.

So every 2 sec:
- open the file
- read the file from the oldPosition to the EOF
- save the last position in file
- first point

mmm ok



From arkanes at gmail.com  Fri Jan 12 13:16:31 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 12 Jan 2007 12:16:31 -0600
Subject: parsing a file name
In-Reply-To: <1168622211.188972.179680@38g2000cwa.googlegroups.com>
References: <1168622211.188972.179680@38g2000cwa.googlegroups.com>
Message-ID: <4866bea60701121016q245b50f3n3b0929b0e195dca0@mail.gmail.com>

On 12 Jan 2007 09:16:51 -0800, CSUIDL PROGRAMMEr <syedamjad_a at yahoo.com> wrote:
> I have a filename
> cairo-2.3.4.src.rpm
> Is there any way i can only get 2.3.4 from this file name
> thanks
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I'm trying to think of a good reason to extract the version from the
filename instead of using RPM to get the real version from the
metadata and I can't come up with one.


From steve at REMOVEME.cybersource.com.au  Mon Jan 29 21:48:11 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 30 Jan 2007 13:48:11 +1100
Subject: error messages containing unicode
References: <1170122515.980168.150960@p10g2000cwp.googlegroups.com>
Message-ID: <pan.2007.01.30.02.48.10.853852@REMOVEME.cybersource.com.au>

On Mon, 29 Jan 2007 18:01:56 -0800, Jim wrote:

> Hello,
> 
> I'm trying to write exception-handling code that is OK in the 
> presence
> of unicode error messages.  I seem to have gotten all mixed up and 
> I'd
> appreciate any un-mixing that anyone can give me.

[snip]

>>> class MyException(Exception): pass
...
>>> fn = u'a\N{LATIN SMALL LETTER O WITH DIAERESIS}k'
>>> raise MyException("hello")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
__main__.MyException: hello
>>> 

Works fine with an ASCII argument, but not with Unicode:

>>> raise MyException(fn)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
__main__.MyException>>>

Notice the terminal problem? (The error message doesn't print, and the
prompt ends up stuck after the exception.)

Let's capture the exception and dissect it:

>>> try: raise MyException(fn)
... except Exception, err:
...     print type(err)
...     print err
...
<type 'instance'>
Traceback (most recent call last):
  File "<stdin>", line 4, in ?
UnicodeEncodeError: 'ascii' codec can't encode character u'\xf6' in
position 1: ordinal not in range(128)

Now we have the answer: your exception (which just sub-classes Exception)
does the simplest conversion of Unicode to ASCII possible, and when it
hits a character it can't deal with, it barfs. That doesn't happen
until you try to print the exception, not when you create it. 

The easiest ways to fix that are:

(1) subclass an exception that already knows about Unicode; 

(2) convert the file name to ASCII before you store it; or 

(3) add a __str__ method to your exception that is Unicode aware.

I'm going to be lazy and do a real simple-minded version of (2):

>>> class MyBetterException(Exception):
...     def __init__(self, arg):
...             self.args = arg.encode('ascii', 'replace')
...             self.unicode_arg = arg  # save the original in case



>>> raise MyBetterException(fn)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
__main__.MyBetterException: a?k


And now it works.



-- 
Steven D'Aprano 



From smusnmrNOSPAM at yahoo.com  Mon Jan  8 09:33:21 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Mon, 8 Jan 2007 15:33:21 +0100
Subject: help: code formatter?
Message-ID: <entknh$8onl$1@zam602.zam.kfa-juelich.de>

Hi all,

as a newbie I have problems with formatting code of downloaded programs,
because IDLE's reformatting capabilities are limited . Incorrect
indentation, mixing of TAB with BLANKs or eol are often very nasty to
correct.
Is there a simple code formatter that first removes all indentations and
then refomats correctly?

Please help!

Thank you,

siggi






From carsten at uniqsys.com  Fri Jan 12 15:28:00 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 12 Jan 2007 15:28:00 -0500
Subject: dynamic argument name for functions
In-Reply-To: <8c7f10c60701121222p2187225fn3e0559388a83a16e@mail.gmail.com>
References: <e04d2e90701121217w32829ef9g4bd0af00b643dc2c@mail.gmail.com>
	<8c7f10c60701121222p2187225fn3e0559388a83a16e@mail.gmail.com>
Message-ID: <1168633680.3382.96.camel@dot.uniqsys.com>

On Fri, 2007-01-12 at 20:22 +0000, Simon Brunning wrote:
> On 1/12/07, mark <rkmr.em at gmail.com> wrote:
> > I want to pass a value to an argument of a function. The argument name is
> > dynamic and is stored in a
> >  variable. How do I call the function using with arg_name and value as the
> > parameters.
> >  thanks
> >  mark
> >
> >  For ex:
> >  def function(arg1='None', arg2='None', arg3='None'):
> >        print arg1
> >        print arg2
> >        print arg3
> >
> >
> >  arg_name = 'arg1'
> >  arg_value = 'i am passing a value to argument 1'
> >  function(???????)
> 
> Untested:
> 
> function(**{arg_name: arg_value})

My version is superior: I tested it before replying. ;)

-Carsten




From richard.szlachta at gmail.com  Fri Jan  5 14:02:23 2007
From: richard.szlachta at gmail.com (Richard Szlachta)
Date: Fri, 5 Jan 2007 20:02:23 +0100
Subject: Piskworky - "five-in-row" over jabber network
Message-ID: <7a7ba5760701051102o33ad8e48xf3e087ba8e64bb15@mail.gmail.com>

Readers of python mailing list of all ages and systems,

I'd like to introduce you program called ' Piskworky '. It is written
in python, uses tkinter gui and is made for playing game known as
five-in-row. Game is pure multiplayer (two-player exactly ;) and it
does it's synchronization via jabber network.
Well, check the website: http://piskworky.ic.cz/


From UncleAl0 at hate.spam.net  Tue Jan 30 09:45:50 2007
From: UncleAl0 at hate.spam.net (Uncle Al)
Date: Tue, 30 Jan 2007 06:45:50 -0800
Subject: Secret Technology of THERMATE and 911 Crime
References: <1170127646.046184.213690@k78g2000cwa.googlegroups.com>
Message-ID: <45BF5A1E.79964DEE@hate.spam.net>

thermate at india.com wrote:
[snip crap]

> I do not plan to make a career out of 9/11 research,
[snip more crap]

> We have found evidence for thermates in the molten metal seen pouring
> from the South Tower minutes before its collapse,
[snip still more crap]

> Thermate is the red
> powder in the steel base. The prototype worked well, and the thermate-
> jet cut through a piece of structural steel in a fraction of a second.

Google
thermite  595,000

You can't even spell it correctly.  If you wish to see the light,
begin by pullng your head out of your ass,

http://www.mazepath.com/uncleal/sunshine.jpg

Idiot.  You don't know dick about incendiaries.

-- 
Uncle Al
http://www.mazepath.com/uncleal/
 (Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/lajos.htm#a2


From universal_used at hotmail.com  Wed Jan 17 21:37:41 2007
From: universal_used at hotmail.com (questions?)
Date: 17 Jan 2007 18:37:41 -0800
Subject: example from the book
Message-ID: <1169087861.453278.58680@a75g2000cwd.googlegroups.com>

I am a little confused by an example in python book:

class wrapper:
    def __init__(self,object):
        self.wrapped=object
    def __getattr__(self,attrname):
        print "Trace:",attrname
        print getattr(self.wrapped,attrname)       (*)
        return getattr(self.wrapped,attrname)     (**)

x=wrapper({"a":1, "b":2})
print x.keys()                                                 (**)


(*) will output: <built-in method keys of dict object at 0xb7f0f4f4>
while two (**) statements together will print the keys of the
dictionary which is ['a','b']

why (*) doen't output the same result as (**)?

Thanks



From osantana at gmail.com  Tue Jan 16 12:45:59 2007
From: osantana at gmail.com (Osvaldo Santana)
Date: Tue, 16 Jan 2007 14:45:59 -0300
Subject: Python for Maemo -- new version released
Message-ID: <b674ca220701160945h36e8230fjfe3c190dfb4dd15b@mail.gmail.com>

We from INdT (Nokia Institute of Technology -- Brazil) have the pleasure
to announce the new version of Python for Maemo, for Maemo SDK 2.1
("Scirocco") and SDK 3.0 ("Bora"). Highlights of this version:

* Support for Nokia N800[1] device/software (SDK 3.0)
* Language updated to Python 2.5
* Updated bindings
* Added bindings to new Hildon widgets
* Improved OSSO bindings
* Project home has moved to Garage.maemo.org.

The new project page is http://pymaemo.garage.maemo.org. There you can
find directions about repositories, installation on SDK/device etc. The
release notes for this version can be found at
http://pymaemo.garage.maemo.org/pymaemo25_releasenotes.html.

We encourage everybody to try the software and report bugs/improvement
requests.

Thanks,
Osvaldo Santana Neto

[1] http://europe.nokia.com/phones/n800


-- 
Osvaldo Santana Neto (aCiDBaSe)
http://www.pythonologia.org


From hg at nospam.org  Tue Jan 23 01:55:45 2007
From: hg at nospam.org (hg)
Date: Tue, 23 Jan 2007 07:55:45 +0100
Subject: beep or sound playing under linux
References: <pFath.50034$oA1.40310@newsfe19.lga>
	<mailman.3008.1169507117.32031.python-list@python.org>
Message-ID: <ntoth.252473$Pv5.124701@newsfe17.lga>

Chuck Rhode wrote:

> hg wrote this on Mon, Jan 22, 2007 at 04:12:50PM +0100.  My reply is
> below.
> 
>> Is there a way to do that?  (Make noise.)
> 
> In Gnome there is:
> 
> gtk.gdk.beep()
> 
> --
> .. Chuck Rhode, Sheboygan, WI, USA
> .. Weather:  http://LacusVeris.com/WX
> .. 28? ? Wind WSW 10 mph ? Sky overcast.

well wx.Bell() I assume does the same since wxPython use gtk+ ... still I'm
under gnome with system bell enabled and I do not hear anything

hg



From Thomas.Ploch at gmx.net  Sat Jan  6 19:41:05 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sun, 07 Jan 2007 01:41:05 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
Message-ID: <45A041A1.6020108@gmx.net>

time.swift at gmail.com schrieb:
> Coming from a C++ / C# background, the lack of emphasis on private data
> seems weird to me. I've often found wrapping private data useful to
> prevent bugs and enforce error checking..
> It appears to me (perhaps wrongly) that Python prefers to leave class
> data public.  What is the logic behind that choice?
> 
> Thanks any insight.
> 

Python doesn't prefer public data in classes. It leaves the choice to
the programmer. You can define your own private instance variables (or
functions) by using a '__' prefix:

example:
class Foo:
	def __init__(self, data):
		self.__data = data
	
	def get_data(self):
		return self.__data


 >>> f = Foo('bar')
 >>> f.__data
 Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
 AttributeError: Foo instance has no attribute '__data'
 >>> f.get_data()
 'bar'



From sjmachin at lexicon.net  Sat Jan 20 13:26:48 2007
From: sjmachin at lexicon.net (John Machin)
Date: 20 Jan 2007 10:26:48 -0800
Subject: OT Annoying Habits (Was: when format strings attack)
In-Reply-To: <mailman.2940.1169295399.32031.python-list@python.org>
References: <NYOBGCEXSMTP21R1PDG000b0f9b@nyobgcexsmtp21.uswin.ad.vzwcorp.com>
	<mailman.2940.1169295399.32031.python-list@python.org>
Message-ID: <1169317608.819304.321210@l53g2000cwa.googlegroups.com>


Michael.Coll-Barth at VerizonWireless.com wrote:
[snip]

> The information contained in this message and any attachment may be
> proprietary, confidential, and privileged or subject to the work
> product doctrine and thus protected from disclosure.  If the reader
> of this message is not the intended recipient, or an employee or
> agent responsible for delivering this message to the intended
> recipient, you are hereby notified that any dissemination,
> distribution or copying of this communication is strictly prohibited.
> If you have received this communication in error, please notify me
> immediately by replying to this message and deleting it and all
> copies and backups thereof.  Thank you.

... and while we're talking about annoyances ...



From donn at u.washington.edu  Mon Jan 22 13:24:10 2007
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 22 Jan 2007 10:24:10 -0800
Subject: Is any python like linux shell?
References: <1169398326.510530.180860@51g2000cwl.googlegroups.com>
	<1169400157.075307.31340@l53g2000cwa.googlegroups.com>
	<1169437900.726137.237650@51g2000cwl.googlegroups.com>
	<ep1jut$sla$2@daisy.noc.ucla.edu>
Message-ID: <donn-60D740.10240922012007@gnus01.u.washington.edu>

In article <ep1jut$sla$2 at daisy.noc.ucla.edu>,
 James Stroud <jstroud at mbi.ucla.edu> wrote:
...
> Paddy wrote:'
> > Frank,
> > IPython is great, but it is not a replacement for a shell like bash. If
> > you have a Linux system then you still need to know the rudiments of
> > bash 
> 
> Or better yet, csh. ;)

Careful, someone will think you're serious.


From http  Wed Jan  3 06:07:36 2007
From: http (Paul Rubin)
Date: 03 Jan 2007 03:07:36 -0800
Subject: Synchronization methodology
References: <mailman.2231.1167803272.32031.python-list@python.org>
	<7x64boml1l.fsf@ruckus.brouhaha.com>
Message-ID: <7x1wmcmkqv.fsf@ruckus.brouhaha.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>    # add the user to the connected user list, with timestamp and remote IP
>    status = request(user_list.append, self, time(), remote_ip=whatever)

Editing error, ignore the "self," arg up there.  Of course there may be
other mistakes too, I didn't test any of that code ;-)


From timr at probo.com  Thu Jan 11 02:19:22 2007
From: timr at probo.com (Tim Roberts)
Date: Thu, 11 Jan 2007 07:19:22 GMT
Subject: how to clean sys.path
References: <eo0eom$cirq$1@zam602.zam.kfa-juelich.de>
Message-ID: <p3pbq2h0gaa9qkrl03iansir43vjjp00k7@4ax.com>

"siggi" <smusnmrNOSPAM at yahoo.com> wrote:
>
>when I do >>>sys.path in IDLE (winXP), i get a horrendously long list of 
>paths, paths I may have used during a lot of trials and errors. How can I 
>clean up sys.path? I mean, trim it of unnecessary paths?

What do mean by "used during a lot of trials and errors"?  sys.path is
recreated from scratch every time Python starts.  It doesn't accumulate
over time, other than from new packages that you install.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From johnpote at blueyonder.co.uk  Wed Jan 31 12:13:39 2007
From: johnpote at blueyonder.co.uk (John Pote)
Date: Wed, 31 Jan 2007 17:13:39 GMT
Subject: where has Stani's Py Editor gone?
Message-ID: <774wh.208375$MO2.74678@fe3.news.blueyonder.co.uk>

Hi everyone,

Been trying to get the latest version of Stani's Python Editor the last few 
days. But I cannot get any response out of 'pythonide.stani.be'. Anyone know 
what's happened?

Ta much,

John Pote 




From pavlovevidence at gmail.com  Tue Jan  2 17:22:41 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 2 Jan 2007 14:22:41 -0800
Subject: array of class
In-Reply-To: <mailman.2221.1167763760.32031.python-list@python.org>
References: <mailman.2221.1167763760.32031.python-list@python.org>
Message-ID: <1167776561.041382.60300@s34g2000cwa.googlegroups.com>


mm wrote:
> How can I do a array of class?
>
> s1=[]  ## this array should hold classes
>
> ## class definition
> class Word:
>    word=""
>
>
> ## empty words... INIT
> for i in range(100):  ## 0..99
>    s1.append(Wort)
>
> s1[0].word="There"
> s1[1].word="should"
> s1[2].word="be"
> s1[3].word="different"
> s1[4].word="classes"
>
> ... but it's not.

I presume you want an list (not array) of objects (not classes).  In
that case, you're missing parentheses after Word.  You have to call the
class object, same as you'd call a function, so you have to follow it
with parentheses:

s1.append(Word())

You could, in fact, have an array of classes, and there are actually
reasons you might want to do that, but that's pretty advanced.


Carl Banks



From marcpp at gmail.com  Tue Jan 23 06:30:41 2007
From: marcpp at gmail.com (Marcpp)
Date: 23 Jan 2007 03:30:41 -0800
Subject: I need suggests
In-Reply-To: <1169551582.196591.48140@v45g2000cwv.googlegroups.com>
References: <1169551582.196591.48140@v45g2000cwv.googlegroups.com>
Message-ID: <1169551841.053212.160320@j27g2000cwj.googlegroups.com>

Hi, I'm using SPE (Stani's Python Editor)
http://projects.blender.org/projects/spe
It works very good and incorporates WX support.


Pat wrote:
> I have to do a big programm. Could someone give me some suggests about
> IDE (on Linux) and books to learn.



From slowness.chen at gmail.com  Wed Jan 24 04:00:18 2007
From: slowness.chen at gmail.com (Slowness Chen)
Date: 24 Jan 2007 01:00:18 -0800
Subject: [OT]Could anyone send me a copy of  "timeout sockets for jython"
Message-ID: <1169629217.082199.242100@d71g2000cwa.googlegroups.com>

The information about this module:
http://www.xhaus.com/alan/python/timeout.html

I can't access the download url due to the severe network issue these
days, and I need to use this module for work.
Could anyone do me a favor to send a copy? the download url :

http://cvs.sourceforge.net/viewcvs.py/jython/jython/Lib/socket.py?rev=1.16&view=log

Thanks.



From jdvolz at gmail.com  Thu Jan 18 11:25:03 2007
From: jdvolz at gmail.com (jdvolz at gmail.com)
Date: 18 Jan 2007 08:25:03 -0800
Subject: urllib2 and transfer-encoding = chunked
References: <1169108468.497013.228520@l53g2000cwa.googlegroups.com>
	<mailman.2868.1169131800.32031.python-list@python.org>
Message-ID: <1169137502.990783.222150@51g2000cwl.googlegroups.com>

Haha!  My mistake.

The error is that when a web server is chunking a web page only the
first chunk appears to be acquired by the urllib2.urlopen call.  If you
check the headers, there is no 'Content-length' (as expected) and
instead there is 'transfer-encoding' = 'chunked'.  I am getting about
the first 30Kb, and then nothing else.

I don't get a ValueError like described at the following post:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/e3f87a65c4c7e875/8a3ea9ca84b28669?lnk=gst&q=chunked&rnum=1#8a3ea9ca84b28669

Here's the code that I think is failing, it's basically textbook Python
for accessing a url:

file = urllib2.urlopen(url)
contenttype = file.info().type
if contenttype and contenttype.find('text') > -1:
    return file.read()
#
# I am checking the content type because I don't want to download
.jpegs and the like
#

I have typed similar commands into the interpreter, which also produces
only about the first 30KB of the url.

Sorry for the confusion.

Gabriel Genellina wrote:
> <jdvolz at gmail.com> escribi? en el mensaje
> news:1169108468.497013.228520 at l53g2000cwa.googlegroups.com...
> >I am having errors which appear to be linked to a previous bug in
> > urllib2 (and urllib) for v2.4 and v2.5 of Python.  Has this been fixed?
> > Has anyone established a standard workaround?  I keep finding old
> > posts about it, that basically give up and say "well it's a known bug."
> > Any help would be greatly appreciated.
>
> Perhaps if you said what the supposed error is...
> 
> -- 
> Gabriel Genellina



From duncan.booth at invalid.invalid  Sat Jan 13 11:22:24 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 13 Jan 2007 16:22:24 GMT
Subject: Boilerplate in rich comparison methods
References: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>
	<1168674664.792869.213260@m58g2000cwm.googlegroups.com>
	<45a90301$0$7677$4c368faf@roadrunner.com>
Message-ID: <Xns98B7A6871ED78duncanbooth@127.0.0.1>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote:

> In Python, this would look like:
> 
> class Parrot:
>     def __eq__(self, other):
>         return self is other or self.plumage() == other.plumage()
>     def __ne__(self, other):
>         return self is not other and self.plumage() != other.plumage()
>     def __lt__(self, other):
>         return self is not other and self.plumage() < other.plumage()
>     def __gt__(self, other):
>         return self is not other and self.plumage() > other.plumage()
>     def __le__(self, other):
>         return self is not other and self.plumage() <= other.plumage()
>     def __ge__(self, other):
>         return self is not other and self.plumage() >= other.plumage()
> 
> and George's metaclass would have similar changes.
> 
> On the other hand, I haven't seen this idiom in any Python code that
> I've read, and I wonder if this was just a coding fad of the time.

It is a perfectly reasonable short-cut for those types where you know an 
object is equal to itself, but that isn't always the case. e.g. floating 
point NaN values are not equal to themselves, and a list of numbers might 
contain a NaN which would mean the list wouldn't be equal to itself.

Also note that for the __le__, __ge__ cases you got the shortcut test the 
wrong way round.


From bj_666 at gmx.net  Mon Jan 22 03:23:02 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 22 Jan 2007 09:23:02 +0100
Subject: instancemethod
References: <ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a@mail.gmail.com>
	<ep110v$t04$1@sea.gmane.org>
	<ef60af090701211712u4d5a520q84c8e86c898bc649@mail.gmail.com>
	<mailman.2973.1169431114.32031.python-list@python.org>
Message-ID: <pan.2007.01.22.08.23.01.84826@gmx.net>

In <mailman.2973.1169431114.32031.python-list at python.org>, Gert Cuykens
wrote:

>> > >    gert.excecute('select * from person')
>> > >    for x in range(0,gert.rowcount):
>> > >        print gert.fetchone()
>> > >    gert.close()
>> >
>
> [?] 
>
> python always seems to amaze me how other languages make a mess of
> things that suppose to be simple

It gets even simpler: cursor objects are iterable after the `execute()`
call. So you don't need the number of rows::

    gert.excecute('select * from person')
    for row in gert:
        print row
    gert.close()

Ciao,
	Marc 'BlackJack' Rintsch


From tim.one at comcast.net  Fri Jan 26 01:33:56 2007
From: tim.one at comcast.net (Tim Peters)
Date: Fri, 26 Jan 2007 00:33:56 -0600
Subject: doctest problem with null byte
References: <pan.2007.01.26.02.12.39.635773@bmsi.com>
Message-ID: <Xns98C4FECBDA0Btim111one@216.196.97.136>

[Stuart D. Gathman]
> I am trying to create a doctest test case for the following:
>
> def quote_value(s):
>     """Quote the value for a key-value pair in Received-SPF header
>     field if needed.  No quoting needed for a dot-atom value.
>
>     >>> quote_value(r'abc\def')
>     '"abc\\\\\\\\def"'
>     >>> quote_value('abc..def')
>     '"abc..def"'
>     >>> quote_value('')
>     '""'
>     >>> quote_value('-all\x00')
>     '"-all\\\\\\\\x00"'
>     ...
> 
> However, doctest does *not* like the null byte in the example (yes,
> this happens with real life input):
> **********************************************************************
> File "/home/stuart/pyspf/spf.py", line 1453, in spf.quote_value
> Failed example:
>     quote_value('-all')
> Exception raised:
>     Traceback (most recent call last):
>       File
>       "/var/tmp/python2.4-2.4.4c1-root/usr/lib/python2.4/doctest.py", 
>      line 1248, in __run
>         compileflags, 1) in test.globs
>     TypeError: compile() expected string without null bytes
> **********************************************************************
> 
> How can I construct a test cast for this?

As the docs say, doctest examples are parsed /twice/:  once when Python 
compiles the module and creates string objects, and again when doctest 
extracts and passes example substrings to the compile() function (which 
you can see in your traceback).

The first time, the \x00 in the

     quote_value('-all\x00')

portion of your docstring got changed into an honest-to-goodness NUL 
byte.  Passing that to compile() can't work.

To alleviate that, and the "leaning toothpick syndrome" in your other 
examples, a simple approach is to make your docstring a raw string 
(stick the letter 'r' in front of the opening triple-quote).

For example, this works fine:

def f():
    r"""
    >>> len("\\")
    1
    >>> ord("\x00")
    0
    """

Because it's a raw string, Python does /not/ change the

    \x00

portion into a NUL byte when it compile the module.  Instead the 
docstring continues to contain the 4-character substring:

    \x00

and that's what compile() needs to see.

To perform the same test without using a raw string requires slamming in 
more backslashes (or other ad-hoc escaping tricks):

def g():
    """
    >>> len("\\\\")
    1
    >>> ord("\\x00")
    0
    """


From liam_jones at yahoo.com  Wed Jan 10 10:22:59 2007
From: liam_jones at yahoo.com (liam_jones at yahoo.com)
Date: 10 Jan 2007 07:22:59 -0800
Subject: Using Excel With Python
Message-ID: <1168442579.066246.16650@k58g2000hse.googlegroups.com>

I'm very new to Python, well IronPython to precise, and have been
having problems when using Excel.

The problem I'm having is the closing of my Excel object. I'm able to
successfully quit the Excel Application that I create, but when I open
a Workbook in the Application I can't successfully Quit Excel (by this
I mean I can quit it, but the Excel process isn't getting killed and I
have to manually go this through Task Manager).

I've given a sample of code below to hopefully make things clearer.
I've then given all of the information I think might be useful (sorry
if I've gone over the top!).


import System
import clr
from System.Data import *
from System.Web import *
from System.Web.UI import *
from clr import *

clr.AddReference("Microsoft.Office.Interop.Word")
clr.AddReference("Microsoft.Office.Interop.Excel")
clr.AddReference("Microsoft.Office.Interop.PowerPoint")
clr.AddReference("Office")

from Microsoft.Office.Interop.Word import ApplicationClass as
WordApplication
from Microsoft.Office.Interop.Excel import ApplicationClass as
ExcelApplication
from Microsoft.Office.Interop.PowerPoint import ApplicationClass as
PowerPointApplication
from Microsoft.Office.Interop.Word import WdReplace
from Microsoft.Office.Interop.Excel import XlCellType
from Microsoft.Office.Interop.Excel import XlSearchDirection
from System.Type import Missing
from System import GC

missing = Missing
FileLocation = "C:\\test.xls"

ExcelApp = ExcelApplication()
workbook= None

workbook = ExcelApp.Workbooks.Open(FileLocation, missing, missing,
missing, missing, missing, missing, missing, missing, missing, missing,
missing, missing, missing, missing)

workbook.Save()
workbook.Close(SaveChanges=0)

ExcelApp.Quit()

workbook = None
ExcelApp = None

GC.Collect()
GC.WaitForPendingFinalizers()


I've simpilised the code by taking all of my Workbook processing from
it and the problem is still occurring. As I said above if I don't
create the workbook, then ExcelApp closes as expected (there are no
stray processes).

I've read many articles and postings over the last few days regarding
this, but have had no luck with anything I've seen, examples of this
are now given.

I've tried adding the below code, but with no luck.

ExcelApp.ActiveWorkbook.Save()
ExcelApp.ActiveWorkbook.Close(SaveChanges=0)
ExcelApp.Workbooks.Close()

I've also tried the below (again with no luck).

System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook)
System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp)

And, I've also tried the following (again with no luck!).

del(workbook)
del(excelApp)

It may seem strange using the Garbage Collector (well I wouldn't have
thought about using it here), but it was something that I read about
using for code written in C#. I've tried the code in C# (what I
normally write in) and all works fine, the only real difference is that
I'm setting the objects to NULL in C# and None here in IronPython -
Does this make a difference, is there something else I should be
setting it to? The Workbook object HAS to be set to NULL in C#, it's
then picked up by the Garbage Collector and the task disappears from
the Task Manager.

I did think of killing the actual EXCEL.EXE process at the end of my
code, but there might be several versions of the containing application
running on the same box, so I can't kill all of the Excel processes.

As I said above, I'm sorry if I've gone over the top in my description.
Any ideas or pointers would be greatly appreciated as I'm now going
round in circles.

Thanks in advance.


Rgds
Liam



From nagle at animats.com  Wed Jan 31 02:30:40 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 31 Jan 2007 07:30:40 GMT
Subject: how to "free" an object/var ?
In-Reply-To: <pan.2007.01.31.06.52.12.82782@REMOVEME.cybersource.com.au>
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
	<epolgl$8i4$1@zinnia.noc.ucla.edu>
	<pan.2007.01.31.06.52.12.82782@REMOVEME.cybersource.com.au>
Message-ID: <AAXvh.1465$zH1.1114@newssvr29.news.prodigy.net>

Steven D'Aprano wrote:
> On Tue, 30 Jan 2007 15:48:37 -0800, James Stroud wrote:
> 
> 
>>Stef Mientki wrote:
>>
>>>If I create a large array of data or class,
>>>how do I destroy it (when not needed anymore) ?

    If your data structure has no backlinks, it will go away
as soon as the last reference to it disappears.  If your
data structure has backlinks, it will hang around until
garbage collection runs.  If your backlinks are
weak references (see "weakref"), the data structure will
be released much sooner.

    If you generate structures with backlinks, like
parse trees, use weak references for all links that point
backwards toward the root, and you'll use less memory.

    In Python, garbage collection is mostly a backup to
the reference counting system.  If your app really
needs periodic GC to run, you're leaking memory.
On servers, this sometimes matters.

				John Nagle


From elrondrules at gmail.com  Tue Jan 30 15:34:38 2007
From: elrondrules at gmail.com (elrondrules at gmail.com)
Date: 30 Jan 2007 12:34:38 -0800
Subject: Convert raw data to XML
In-Reply-To: <CyNvh.1384$zH1.1245@newssvr29.news.prodigy.net>
References: <1170124927.718200.225080@m58g2000cwm.googlegroups.com>
	<mailman.3289.1170133211.32031.python-list@python.org>
	<1170184059.739808.244660@s48g2000cws.googlegroups.com>
	<CyNvh.1384$zH1.1245@newssvr29.news.prodigy.net>
Message-ID: <1170189278.490020.52670@h3g2000cwc.googlegroups.com>

On Jan 30, 12:05 pm, John Nagle <n... at animats.com> wrote:
> elrondru... at gmail.com wrote:
> > On Jan 29, 8:54 pm, "Gabriel Genellina" <gagsl... at yahoo.com.ar> wrote:
>
> >>En Mon, 29 Jan 2007 23:42:07 -0300, <elrondru... at gmail.com> escribi?:
> > the reason I wanted to write it as a file was to parse the file, look
> > for a specific attribute and execute a set of commands based on the
> > value of the attribute.. also i needed to display the output of the
> > http post in a more readable format..
>
>     That's straightforward.  You confused people by asking the
> wrong question.  You wrote "Convert raw data to XML", but what
> you want to do is parse XML and extract data from it.
>
>     This will do what you want:
>
>        http://www.crummy.com/software/BeautifulSoup/
>
> For starters, try
>
>         from BeautifulSoup import BeautifulStoneSoup
>         xmlstring = somexml     ## get your XML into here as one big string
>         soup = BeautifulStoneSoup(xmlstring)    # parse XML into tree
>         print soup.prettify()   # print out in indented format
>
> "soup" is a tree structure representing the XML, and there are
> functions to easily find items in the tree by tag name, attribute,
> and such.  Work on the tree, not a file with the text of the indented
> output.
>
>                                 John Nagle

is there any other way to do this without using BeautifulStoneSoup.. 
using existing minidom or ext..
i dont want to install anything new



From ptmcg at austin.rr.com  Fri Jan 26 12:53:04 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 26 Jan 2007 09:53:04 -0800
Subject: how to remove c++ comments from a cpp file?
In-Reply-To: <1169805244.879280.235660@v45g2000cwv.googlegroups.com>
References: <1169801197.941449.303000@v33g2000cwv.googlegroups.com>
	<mailman.3190.1169802638.32031.python-list@python.org>
	<1169805244.879280.235660@v45g2000cwv.googlegroups.com>
Message-ID: <1169833984.384055.51180@j27g2000cwj.googlegroups.com>

On Jan 26, 3:54 am, "Frank Potter" <could.... at gmail.com> wrote:
>
> I'm very sorry because I was in a hurry when I post this thread.
> I'll post again my code here:
> [CODE]
> import re
>
> f=open("show_btchina.user.js","r").read()
> f=unicode(f,"utf8")
>
> r=re.compile(ur"//[^\r\n]+$", re.UNICODE|re.VERBOSE)
> f_new=r.sub(ur"",f)
>
> open("modified.js","w").write(f_new.encode("utf8"))
> [/CODE]
>

Here's a pyparsing version that will stay clear of '//' inside quoted
strings. (untested)

-- Paul


from pyparsing import javaStyleComment, dblQuotedString

f=open("show_btchina.user.js","r").read()
f=unicode(f,"utf8")

commentFilter = Suppress( javaStyleComment ).ignore( dblQuotedString )
f_new= commentFilter.transformString(f)

open("modified.js","w").write(f_new.encode("utf8"))



From bluejump at mac.com  Sat Jan 13 17:49:25 2007
From: bluejump at mac.com (Kajsa Anka)
Date: Sat, 13 Jan 2007 23:49:25 +0100
Subject: HTML Calendar code
References: <0001HW.C1CED6FB000CC50DF0407648@News.Individual.DE>
	<1168714324.437746.272060@l53g2000cwa.googlegroups.com>
Message-ID: <0001HW.C1CF2085001E0175F0182648@News.Individual.DE>

Thanks



From tleeuwenburg at gmail.com  Thu Jan 11 00:22:29 2007
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 10 Jan 2007 21:22:29 -0800
Subject: The Python Papers: Submit your Quotes
Message-ID: <1168492949.830615.131350@o58g2000hsb.googlegroups.com>

Volume Two of The Python Papers is on its way, and it would be great to
get some more words from the community in there. Submit your own quotes
to submissions at pythonpapers.org to get a brief comment included in our
next publication. Please include any attribution information you
wish...

Let's get the ball rolling:

"Python? I switched and never looked back." -- Tennessee Leeuwenburg

Submissions taken until Jan 23rd, so get 'em in fast!

Cheers,
-T
(Editor-In-Chief)
Posted by Tennessee Leeuwenburg on 2007/01/11



From gagsl-py at yahoo.com.ar  Tue Jan 16 21:33:17 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 16 Jan 2007 23:33:17 -0300
Subject: Making a simple script standalone
In-Reply-To: <5d1084-5j7.ln1@whisper.very.softly>
References: <5d1084-5j7.ln1@whisper.very.softly>
Message-ID: <7.0.1.0.0.20070116233111.04676d00@yahoo.com.ar>

At Tuesday 16/1/2007 19:49, Rikishi 42 wrote:

>What I want to do is to compile/bundle/prepare/whatever_term a simple
>Python script for deployment on a Windows machine. Installing Python
>itself on that machine, is not an option. Ideally I would like to obtain
>a single executable file, but a script+runtime is acceptable.

distutils + py2exe


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From rw at smsnet.pl  Fri Jan 12 17:35:03 2007
From: rw at smsnet.pl (Rob Wolfe)
Date: Fri, 12 Jan 2007 23:35:03 +0100
Subject: How to respond to a confirmation prompt automatically
References: <1168632324.226733.130870@a75g2000cwd.googlegroups.com>
Message-ID: <87d55j50x4.fsf@smsnet.pl>

"Coby" <firefoxxer at gmail.com> writes:

> Just to give you some background about my problem:
>
> I execute os.system(command), where command is a string.
>
> On the command line in windows, I get:
>
> "Continue, and unload these objects? [no]"
>
> I need to respond 'y' to continue, but I am uncertain on how to output
> the 'y' automatically.

You need to use pipe.

1.

p = os.popen(command, "w")
p.write("y\n")

http://docs.python.org/lib/os-newstreams.html#os-newstreams

2.

from subprocess import Popen, PIPE
p = Popen(command, shell=True, stdin=PIPE)
p.stdin.write("y\n")

http://docs.python.org/lib/module-subprocess.html

-- 
HTH,
Rob


From casevh at comcast.net  Thu Jan  4 10:57:42 2007
From: casevh at comcast.net (casevh at comcast.net)
Date: 4 Jan 2007 07:57:42 -0800
Subject: code optimization (calc PI) / New Algorithme for PI
In-Reply-To: <We9nh.196$Je6.90@nntpserver.swip.net>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<slrneppql6.3v8.nick@irishsea.home.craig-wood.com>
	<We9nh.196$Je6.90@nntpserver.swip.net>
Message-ID: <1167926262.512546.209130@s80g2000cwa.googlegroups.com>


> Yes, this "gmpy" sounds good for calc things like that.
> But not available on my machine.
> ImportError: No module named gmpy

What type of machine?

The home page for gmpy is http://sourceforge.net/projects/gmpy/

I have Windows versions available at http://home.comcast.net/~casevh/

casevh



From george.sakkis at gmail.com  Sun Jan 21 12:22:37 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 21 Jan 2007 09:22:37 -0800
Subject: Is any python like linux shell?
References: <1169398326.510530.180860@51g2000cwl.googlegroups.com>
Message-ID: <1169400157.075307.31340@l53g2000cwa.googlegroups.com>

Frank Potter wrote:

> I learned some python in windows.
> And now I've turned to linux.
> I read a book and it teaches how to write shell script with bash,
> but I don't feel like the grammar of bash.
> Since I know about python,
> I want to get a linux shell which use python grammar.
> I searched by google and I found pysh, which is not maintained any
> more.
> There's another script named pyshell, which is not likely what I'm
> searching for.
> So, will somebody please tell me if there are any python like shells
> for linux?

IPython is actually more than a simple shell. Give it a try:
http://ipython.scipy.org/.

George



From rds1226 at sh163.net  Tue Jan 16 13:51:30 2007
From: rds1226 at sh163.net (Dongsheng Ruan)
Date: Tue, 16 Jan 2007 13:51:30 -0500
Subject: How can I create a linked list in Python?
Message-ID: <eoj6rr$90bt$1@netnews.upenn.edu>

with a cell class like this:

#!/usr/bin/python

import sys

class Cell:

 def __init__( self, data, next=None ):
  self.data = data
  self.next = next

 def __str__( self ):
  return str( self.data )

 def echo( self ):
  print self.__str__() 




From paul at boddie.org.uk  Thu Jan 11 10:11:23 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 11 Jan 2007 07:11:23 -0800
Subject: Read from database, write to another database, simultaneously
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
	<50l9dlF1fuc1sU1@mid.individual.net> <9ihph.72$fo1.64@newsfe03.lga>
	<1168518426.111465.290430@o58g2000hsb.googlegroups.com>
Message-ID: <1168528282.862978.24730@i39g2000hsf.googlegroups.com>

Sean Davis wrote:
>
> As for the specifics, Oracle data is going to be coming in as a DB-API
> 2 cursor in manageable chunks (and at a relatively slow pace).  On the
> postgres loading side, I wanted to use the pscycopg2 copy_from
> function, which expects an open file-like object (that has read and
> readline functionality) and is quite fast for loading data.

And which seems to use the COPY FROM command in PostgreSQL...

> Note the disconnect here--Oracle is coming in in discrete chunks, while
> postgresql is looking for a file object.  I solved this problem by
> creating a temporary file as an intermediary, but why wait for Oracle
> to finish dumping data when I can potentially be loading into postgres
> at the same time that the data is coming in?

My experience along with the PostgreSQL documentation tells me that you
shouldn't worry about this problem too much: using COPY FROM is *far*
faster than performing many inserts or updates. The only thing you'd
need to worry about is data being copied into the database that
duplicates existing data, causing constraint violations, but since
you're already using this method I imagine that this is not a likely
problem.

Paul



From half.italian at gmail.com  Tue Jan 30 06:27:16 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 30 Jan 2007 03:27:16 -0800
Subject: Mounting shares with python
In-Reply-To: <51uvh7F1m9svaU1@mid.individual.net>
References: <1169815227.574577.176610@m58g2000cwm.googlegroups.com>
	<51uvh7F1m9svaU1@mid.individual.net>
Message-ID: <1170156435.994259.233610@h3g2000cwc.googlegroups.com>

On Jan 26, 10:27 am, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Marcpp wrote:
> > Hi, when i mount a share with python...
>
> > os.system ("mount -t smbfs -o username=nobody ...")
>
> > the problem is that I'll to be root.
>
> Consider modifying /etc/fstab.
>
> > Have a comand to send a root password...?
> > I've tried
>
> > os.system ("su")
> > os.system ("the password")
>
> > but it doesn't works.
>
> Be advised that storing a root password as clear text can be a huge
> security risk. Use sudo.
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #9:
>
> doppler effect

I use pexpect.   http://pexpect.sourceforge.net/

~Sean



From david at boddie.org.uk  Wed Jan 24 08:21:31 2007
From: david at boddie.org.uk (David Boddie)
Date: 24 Jan 2007 05:21:31 -0800
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <ep64ic$epi$1@aioe.org>
References: <ep60jp$63v$1@aioe.org><ep64ic$epi$1@aioe.org>
Message-ID: <1169644891.275035.110760@v33g2000cwv.googlegroups.com>

On Jan 24, 12:09 am, "Daniel" <n... at set.se> wrote:
> I've downloaded both the wxPython and the PyQt4 package, and by the
> first impression I must say that the PyQt4 system had a very
> compelling presentation. From what I can understand from the feedback
> I've gotten so far is that the wxPython is a better choice when it
> comes to compability (with linux), and it's free even if I want to
> create applications and sell them.

Can you explain why you think wxPython is a better choice with respect
to "compatibility (with linux)"?

> So, from what I understand I will have to go with PyQt4 since (from
> my understanding):
> 1. I will not sell the applications I'm working with since they will
> only be used by the internal QA at a computer game company.
> 2. There seems to be a lot of documentation available for PyQt4.
> 3. PyQt4 seems to be easier to learn.
> 4. My programs does not need to support Linux or Unix.

Qt is a cross-platform framework, so you would get support for
X11-based
platforms, anyway.

David



From bj_666 at gmx.net  Mon Jan 29 01:55:18 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 29 Jan 2007 07:55:18 +0100
Subject: import from future
References: <1169969100.946843.111770@p10g2000cwp.googlegroups.com>
	<1170049392.204148.54430@a34g2000cwb.googlegroups.com>
Message-ID: <pan.2007.01.29.06.55.17.36996@gmx.net>

In <1170049392.204148.54430 at a34g2000cwb.googlegroups.com>, Dan Bishop
wrote:

> Now that nested_scopes and generators are no longer optional, the only 
> thing left is "from __future__ import division", which makes the "/" 
> operator on integers give the same result as for floats.

>From 2.5 on we have `with_statement`::

  >>> __future__.with_statement
  _Feature((2, 5, 0, 'alpha', 1), (2, 6, 0, 'alpha', 0), 32768)

Ciao,
	Marc 'BlackJack' Rintsch


From tiedon_jano at hotmail.com  Sun Jan  7 16:42:06 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Sun, 07 Jan 2007 21:42:06 GMT
Subject: how to find the longst element list of lists
In-Reply-To: <Vwdoh.223$L06.180@nntpserver.swip.net>
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
Message-ID: <OOdoh.294$_k2.231@read3.inet.fi>

Michael M. kirjoitti:
> How to find the longst element list of lists?
> 
> I think, there should be an easier way then this:
> 
>   s1 = ["q", "e", "d"]
>   s2 = ["a", "b"]
>   s3 = ["a", "b", "c", "d"]
> 
> <snip>
> 
> After, the list ist sorted:
> 
>   sx1 = ["a", "b", "c", "d"]
>   sx2 = ["q", "e", "d"]
>   sx3 = ["a", "b"]
> 

s1 = ["q", "e", "d"]
s2 = ["a", "b"]
s3 = ["a", "b", "c", "d"]
ss = ((len(s1), s1), (len(s2), s2), (len(s3), s3))
sx = [y for (x, y) in sorted(ss)[::-1]]
print sx
sx1, sx2, sx3 = sx
print sx1, sx2, sx3


Cheers,
Jussi


From ricli576 at student.liu.se  Thu Jan 18 19:23:43 2007
From: ricli576 at student.liu.se (Rickard Lindberg)
Date: 18 Jan 2007 16:23:43 -0800
Subject: Match 2 words in a line of file
References: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
Message-ID: <1169166223.073714.109620@51g2000cwl.googlegroups.com>

elrondrules at gmail.com wrote:
> Hi
>
> Am pretty new to python and hence this question..
>
> I have file with an output of a process. I need to search this file one
> line at a time and my pattern is that I am looking for the lines that
> has the word 'event' and the word 'new'.
>
> Note that i need lines that has both the words only and not either one
> of them..
>
> how do i write a regexp for this.. or better yet shd i even be using
> regexp or is there a better way to do this....
>
> thanks

Maybe something like this would do:

import re

def lines_with_words(file, word1, word2):
    """Print all lines in file that have both words in it."""
    for line in file:
        if re.search(r"\b" + word1 + r"\b", line) and \
           re.search(r"\b" + word2 + r"\b", line):
            print line

Just call the function with a file object and two strings that
represent the words that you want to find in each line.

To match a word in regex you write "\bWORD\b".

I don't know if there is a better way of doing this, but I believe that
this should at least work.



From ed at leafe.com  Mon Jan  8 12:59:14 2007
From: ed at leafe.com (Ed Leafe)
Date: Mon, 8 Jan 2007 12:59:14 -0500
Subject: A Good Intro to wxpython/PostgreSQL Applications?
In-Reply-To: <1168276952.498242.78120@v33g2000cwv.googlegroups.com>
References: <1168276952.498242.78120@v33g2000cwv.googlegroups.com>
Message-ID: <90CCE71C-F814-449B-B3E5-D67D69E8C8D3@leafe.com>

On Jan 8, 2007, at 12:22 PM, PAllen wrote:

> I am trying to get rid of a few of my old MS Access applications and
> move them to PostgreSQL and Python/wxpython.  Does anyone have any
> suggestions on the easiest way to learn to program small database
> applications with python & wxpython?  Does anyone have a few small
> examples at least?
>
> I will mainly need forms with/without subforms for viewing and
> inserting data into the database.  Nothing too complicated to get
> started.

	Dabo is designed to do exactly what you describe. It is a desktop  
application framework with an emphasis on database apps. Both myself  
and the other Dabo author, Paul McNett, come from MS Visual FoxPro  
backgrounds, so we know what people expect in a GUI app tool. Be sure  
to check out our screencasts, which show you what is involved in  
creating database applications in Dabo. The screencasts are listed at  
the top of http://dabodev.com/documentation.

	We support several backend databases, and PostgreSQL is one of them.  
We use wxPython as our UI toolkit, but wrap the controls so that they  
have a consistent, property-based API instead of the C++ style of  
getter/setter methods with odd names.

	I will be the first to admit that the how-to documentation is far  
from complete, but there is a good amount of information on the Wiki  
(http://dabodev.com/wiki). And we have our own mailing list that is  
frequented by both the authors and several other helpful folks. You  
can sign up for the dabo-users list at http://leafe.com/mailman/ 
listinfo/dabo-users.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From bjourne at gmail.com  Thu Jan 25 04:14:10 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Thu, 25 Jan 2007 10:14:10 +0100
Subject: Getting to an SSH account over a HTTP proxy
In-Reply-To: <1169514995.916358.17030@11g2000cwr.googlegroups.com>
References: <mailman.2985.1169469575.32031.python-list@python.org>
	<1169514995.916358.17030@11g2000cwr.googlegroups.com>
Message-ID: <740c3aec0701250114k7c76adcex486f711e034b829a@mail.gmail.com>

On 22 Jan 2007 17:16:35 -0800, Nanjundi <nanjundi at gmail.com> wrote:
> BJ?rn Lindqvist wrote:
> > I want to use Python to connect to a SSH account over a HTTP proxy to
> > automate some operations. I thought paramiko would be able to do that,
> > but it can not (it seems).
> >
> > Is there some other Python module that can do what I want?
> >
> > --
> > mvh Bj?rn
>
> Did you take a look at twisted library?
> twistedmatrix.com
> http://twistedmatrix.com/projects/core/documentation/howto/clients.html
>
>
> I haven't tried to connect over port 80, but its worth a try.

I looked at Twisted, but I did not understand how it could solve my
problem. I do not want to create my own SSH client and, AFAICT, there
is no SSH client in Twisted. The library also seem to have some
problems with handling HTTP proxies in a transparent way:
http://twistedmatrix.com/trac/ticket/1774

-- 
mvh Bj?rn


From andre.roberge at gmail.com  Sat Jan 27 16:19:26 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 27 Jan 2007 13:19:26 -0800
Subject: Crunchy 0.8 release
Message-ID: <1169932766.450129.259840@k78g2000cwa.googlegroups.com>

Version 0.8 of Crunchy has been released.  It is available on
http://code.google.com/p/crunchy/

Crunchy, the Interactive Python Tutorial Maker, is an application that
transforms an ordinary html-based Python tutorial into an interactive
session within a web browser.  Currently, only Firefox is supported.
Crunchy is developed and tested on Windows XP and Ubuntu Dapper Drake,
but should work on any suitable windows or UNIX system.

Three major improvements have been made since version 0.7 had been 
released.

1. New editor

Instead of a simple html textarea, Crunchy now gives the option of
using a "real" editor, namely EditArea
(http://www.cdolivet.net/editarea/).  EditArea support syntax coloring
and allows loading and saving local Python files among other features.
 Within Crunchy, it is set up so that the tab key is translated into 4
spaces.

2. Language support

Crunchy now supports English and French, through the use of ".po"
files.  When running Python code, some error messages have been
adapted/translated.  EditArea itself support more languages
(currently: Danish, Dutch, English, French, German, Italian, Japanese,
Polish, Portuguese).

3. Graphical tutorial converter.

Crunchy uses some supplementary markup to transform html files into
interactive tutorials.  Whereas previous versions required a tutorial
maker to edit an html file "by hand", version 0.8 includes a tutorial
editor: with a few clicks, you can easily add to an html file the
chosen interactive elements and options for Crunchy.

In addition to the above major improvements, the code has been
refactored significantly and a number of small bug fixes have been
made.  Crunchy will be demonstrated at the upcoming Pycon 2007.

Andr? Roberge and Johannes Woolard.



From marcpp at gmail.com  Tue Jan 23 05:43:49 2007
From: marcpp at gmail.com (Marcpp)
Date: 23 Jan 2007 02:43:49 -0800
Subject: Working with shared folders
Message-ID: <1169549029.039191.87240@s48g2000cws.googlegroups.com>

Any idea to work with windows shared folders?
Which library is needed to execute console comands?

Thankyou.



From borntonetwork at gmail.com  Wed Jan 17 21:04:19 2007
From: borntonetwork at gmail.com (borntonetwork)
Date: 17 Jan 2007 18:04:19 -0800
Subject: The proper use of QSignalMapper
In-Reply-To: <1169049100.393777.269350@v45g2000cwv.googlegroups.com>
References: <1169045073.138626.60770@l53g2000cwa.googlegroups.com>
	<1169049100.393777.269350@v45g2000cwv.googlegroups.com>
Message-ID: <1169085859.586698.149400@51g2000cwl.googlegroups.com>

Thanks, David, for you help.

When I change the slot function to what you show in your second
example, I get the same results: nothing. When I change it to what you
have in your first example, I get the following:

Object::connect: No such slot QApplication::map()
Object::connect:  (sender name:   'chkProductIngredientsDelete_1')
Object::connect:  (receiver name: 'main.py')
Object::connect: No such slot QApplication::map()
Object::connect:  (sender name:   'chkProductIngredientsDelete_2')
Object::connect:  (receiver name: 'main.py')
Object::connect: No such slot QApplication::map()
Object::connect:  (sender name:   'chkProductIngredientsDelete_3')
Object::connect:  (receiver name: 'main.py')
Object::connect: No such slot QApplication::map()
Object::connect:  (sender name:   'chkProductIngredientsDelete_4')
Object::connect:  (receiver name: 'main.py')
Object::connect: No such slot QApplication::map()
Object::connect:  (sender name:   'chkProductIngredientsDelete_5')
Object::connect:  (receiver name: 'main.py')
Object::connect: No such slot QApplication::map()
Object::connect:  (sender name:   'chkProductIngredientsDelete_6')
Object::connect:  (receiver name: 'main.py')


David Boddie wrote:
> borntonetwork wrote:
>
> > I am trying to implement QTCore.QSignalMapper using PyQT. I finally got
> > to a point where I don't receive any compile or runtime error messages,
> > but I also do not see the final slot function fire off. Here is a
> > snippet of the code:
> >
> >         self.signalMapper = QtCore.QSignalMapper(window)
> >         # Use qsignalmapper to use of one slot function for multiple
> >         # widgets. The map() function sends the slot an extra param
> >         # that identifies the sender.
> >         for idx in range(1, maxIngredients+1):
> >             wName = 'chkProductIngredientsDelete_'+str(idx)
> >             w = self.__dict__[wName]
> >             self.app.connect(w, QtCore.SIGNAL("stateChanged(int)"),
> >                 self.signalMapper,
> >                 QtCore.SLOT("self.signalMapper.map"))
>
> You need to pass the C++ signature to the SLOT() function. I believe
> you want the form that does not accept any arguments:
>
>              self.app.connect(w, QtCore.SIGNAL("stateChanged(int)"),
>                  self.signalMapper,
>                  QtCore.SLOT("map()"))
>
> Alternatively, you can pass the slot directly to the function:
>
>              self.app.connect(w, QtCore.SIGNAL("stateChanged(int)"),
>                  self.signalMapper.map)
>
> PyQt accepts Python methods as slots, without requiring that they be
> wrapped in calls to SLOT().
> 
> David



From nszabolcs at gmail.com  Tue Jan 30 08:44:40 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 30 Jan 2007 05:44:40 -0800
Subject: How can I know both the Key c and Ctrl on the keyboard are
	pressed?
In-Reply-To: <1170147029.261981.322740@a75g2000cwd.googlegroups.com>
References: <1170147029.261981.322740@a75g2000cwd.googlegroups.com>
Message-ID: <1170164680.123191.206630@p10g2000cwp.googlegroups.com>


tidegenerator at tom.com wrote:
> Hi;
> How can I know the Key c and Ctrl on the keyboard are pressed? Or how
> to let the program press the
>
> key Ctrl+c automatically? I just want to use python to develop a
> script program.
> gear

depends on where you got your input from and what do you exactly want

eg:
in a gui app you get input events from the gui toolkit (wx, gtk, sdl/
pygame...)
in a console app if you use curses lib then you can use getch() oslt

if you want a general solution to get input key events in a simple 
script then you cannot do that.

however Ctrl+C is a special key combination: running python in a unix 
terminal it raises KeyboardInterrupt exception, imho in a windows cmd 
promt it raises SystemExit

so you can emulate those by using:
raise KeyboardInterrupt
or
raise SystemExit

hope this helps



From zhouchengly at gmail.com  Tue Jan 16 04:21:52 2007
From: zhouchengly at gmail.com (shellon)
Date: 16 Jan 2007 01:21:52 -0800
Subject: How to convert float to sortable integer in Python
Message-ID: <1168939312.223194.184770@l53g2000cwa.googlegroups.com>

Hi all:
    I want to convert the float number to sortable integer, like the
function float2rawInt() in java, but I don't know the internal
expression of float, appreciate your help!



From robert.kern at gmail.com  Tue Jan  9 04:00:20 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 09 Jan 2007 03:00:20 -0600
Subject: Module to read svg
In-Reply-To: <juk6q21g1takpgsv9qh0vlf1ev70ogec2g@4ax.com>
References: <1168225193.883421.185140@s80g2000cwa.googlegroups.com>	<45a1f746$0$27874$9b622d9e@news.freenet.de>	<mailman.2409.1168254647.32031.python-list@python.org>
	<juk6q21g1takpgsv9qh0vlf1ev70ogec2g@4ax.com>
Message-ID: <envlja$8cj$1@sea.gmane.org>

Tim Roberts wrote:
> Robert Kern <robert.kern at gmail.com> wrote:
> 
>> Martin v. L?wis wrote:
>>> schpok at gmail.com schrieb:
>>>> Does anyone know if there's an actual free implementation of this?
>>> For the dom module in it, xml.dom.minidom should work. Depending on
>>> your processing needs, that might be sufficient.
>> I don't think it quite fits what the OP is asking for. SVG defines some non-XML
>> structure for some of its contents. For example:
>>
>>  <polyline points="100,200 100,100" />
> 
> Why is that non-XML?

Oh, it's valid XML, certainly. However, the data inside the attribute is not
just a bunch of arbitrary characters; it needs to be parsed with a non-XML
parser to get the actual list of points. And unfortunately, "for
space-efficiency" the grammar that describes that data is full of tricks and
shortcuts to save a few characters here and there (actually, I think point lists
are fine; path definitions, though are nuts). See the SVG spec for the full EBNF
grammar.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From smusnmrNOSPAM at yahoo.com  Fri Jan  5 04:58:56 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Fri, 5 Jan 2007 10:58:56 +0100
Subject: where to find wx package
Message-ID: <enl7h1$49m$1@zam602.zam.kfa-juelich.de>

Hi all,

a newbie question:

I have a program gui03A.py using wxPython, importing it such:
"from wxPython.wx import *"

The program works, but I get the warning message:

"gui03A.py:4: DeprecationWarning: The wxPython compatibility package is no
longer  automatically generated or activly maintained.  Please switch to the
wx package  as soon as possible."

However, after extensive searching on www.python.org and Googling the web, I
do not find any package with "wx" as its only name.

Where can I get the wx package (for win32 XP)?

Thanks,

Siggi











From gnewsg at gmail.com  Tue Jan  9 05:08:18 2007
From: gnewsg at gmail.com (billie)
Date: 9 Jan 2007 02:08:18 -0800
Subject: General Question About Python
In-Reply-To: <1168336603.962731.5470@11g2000cwr.googlegroups.com>
References: <1168254451.098796.144790@42g2000cwt.googlegroups.com>
	<1168336603.962731.5470@11g2000cwr.googlegroups.com>
Message-ID: <1168337298.574881.121470@i15g2000cwa.googlegroups.com>

Torabisu wrote:

> Its quite weird, we're looking for Python skills but are battling to
> find at the moment...  Normally Python on its own will probably not
> land you a job, but the last two companies I've worked for are doing
> indepth Python development, so hopefully the tables are turning a bit.

I can tell the same for Italy.
Where are you from?



From jstroud at mbi.ucla.edu  Sat Jan 27 00:50:33 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 26 Jan 2007 21:50:33 -0800
Subject: strip question
In-Reply-To: <1169876027.003477.161350@a75g2000cwd.googlegroups.com>
References: <1169876027.003477.161350@a75g2000cwd.googlegroups.com>
Message-ID: <epep79$cjo$1@daisy.noc.ucla.edu>

eight02645999 at yahoo.com wrote:
> hi
> can someone explain strip() for these :
> [code]
> 
>>>>x='www.example.com'
>>>>x.strip('cmowz.')
> 
> 'example'
> [/code]
> 
> when i did this:
> [code]
> 
>>>>x = 'abcd,words.words'
>>>>x.strip(',.')
> 
> 'abcd,words.words'
> [/code]
> 
> it does not strip off "," and "." .Why is this so?
> thanks
> 

strip strips from the ends.


py> x = '...,.,abcd,words.words,,,,.,.,.,.,'
py> x.strip(',.')
'abcd,words.words'


James


From steve at REMOVEME.cybersource.com.au  Sun Jan 14 23:00:14 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Mon, 15 Jan 2007 15:00:14 +1100
Subject: Conflicting needs for __init__ method
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<pan.2007.01.15.03.43.54.630644@REMOVEME.cybersource.com.au>
Message-ID: <pan.2007.01.15.04.00.13.948798@REMOVEME.cybersource.com.au>

On Mon, 15 Jan 2007 14:43:55 +1100, Steven D'Aprano wrote:

>> Of course, none of this really has anything to do with rational
>> numbers.  There must be many examples of classes for which internal
>> calls to __init__, from other methods of the same class, require
>> minimal argument processing, while external calls require heavier and
>> possibly computationally expensive processing.  What's the usual way
>> to solve this sort of problem?
> 
> class Rational(object):
>     def __init__(self, numerator, denominator):
>         print "lots of heavy processing here..."
>         # processing ints, floats, strings, special case arguments, 
>         # blah blah blah...
>         self.numerator = numerator
>         self.denominator = denominator
>     def __copy__(self):
>         cls = self.__class__
>         obj = cls.__new__(cls)
>         obj.numerator = self.numerator
>         obj.denominator = self.denominator
>         return obj
>     def __neg__(self):
>         obj = self.__copy__()
>         obj.numerator *= -1
>         return obj


Here's a variation on that which is perhaps better suited for objects with
lots of attributes:

    def __copy__(self):
        cls = self.__class__
        obj = cls.__new__(cls)
        obj.__dict__.update(self.__dict__) # copy everything quickly
        return obj




-- 
Steven D'Aprano 



From Thomas.Ploch at gmx.net  Tue Jan  9 19:51:58 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Wed, 10 Jan 2007 01:51:58 +0100
Subject: Question: Best Practice? (module 'shelve')
Message-ID: <45A438AE.10105@gmx.net>

Hello fellows,

I just wanted to know, if there is any best practice concerning
following code:

import re, shelve

class TextMatcher:
    def __init__(self, patterns, email=False, dbName='textmatch.db'):
        self._initPatterns(patterns)
        self.email = email
        self.dbName = dbName
        if self.email:
            self.emailList = []
            self.emailList.append(
		re.compile(r'[a-zA-Z0-9_.]+@\w+\.\w+'))

    def match(self, src, url):
        self.matchDict = {}
        self.matchDict[url] = {}
	# The next 2 functions just add stuff to self.matchDict
        if self.email:
            self._addEmails(src, url)
        self._addPatterns(src, url)
	# Is it good practice to open, write and close the db straight
	# away? Or is it better to leave it open until the whole program
	# has finished, and close it then?
        self.openDB(self.dbName)
        self.db[url] = self.matchDict[url]
        self.db.close()
	# I want to del the matchDict each time so it can't grow big.
	# Is this good, or should it be left open, too?
        del self.matchDict

    def openDB(self, dbName=None, modeflag='c'):
        if dbName == None:
            self.db = shelve.open('textmatch.db', flag=modeflag)
        else:
            self.db = shelve.open(dbName, flag=modeflag)



From arkanes at gmail.com  Thu Jan 11 13:19:54 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 11 Jan 2007 12:19:54 -0600
Subject: Read from database, write to another database, simultaneously
In-Reply-To: <33vph.8825$pQ3.2190@newsread4.news.pas.earthlink.net>
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
	<50l9dlF1fuc1sU1@mid.individual.net>
	<eo4sor$du4$1@upsn250.cri.u-psud.fr>
	<1168519760.894380.303990@i39g2000hsf.googlegroups.com>
	<33vph.8825$pQ3.2190@newsread4.news.pas.earthlink.net>
Message-ID: <4866bea60701111019w7d0cd807pdba35f3e2de92604@mail.gmail.com>

On 1/11/07, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> On 11 Jan 2007 04:49:21 -0800, "Sean Davis" <seandavi at gmail.com>
> declaimed the following in comp.lang.python:
>
>
> >
> > The machine running the script is distinct from the Oracle machine
> > which is distinct from the Postgresql machine.  So, CPU usage is low
>
>         Which somewhat cancels the idea of just using pipes to pass data
> directly... Unless the command-line clients can be run "locally" and
> connect to the remote servers.
>
> > buffer.  A Queue isn't quite right as it stands, as the data is coming
> > in as records, but for postgres loading, a file-like stream is what I
> > need, so there will need to be either a wrapper around the Queue on the
>
>         "need"? No... the "copy ... from ..." statement "needs" such, but do
> you really "need" to use "copy ... from ..." to load the data -- or is
> this just a concept that caught your fancy?
>
>         If  you can get Oracle to dump the data in the form of SQL insert
> statements, maybe with some clean-up done by a script, and feed them to
> PostgreSQL the entire job starts to look something like:
>
> odump theDatabase | python cleanup.py | psql theNewDatabase
>
> {note: command line tool names are made up for the example}
>
>         "copy ... from ..." appears to be designed to work with formatted
> text files... Something that might have been produced as a tabular
> report by almost any tool. As such, you are basically bypassing most of
> the DB-API capability. If Oracle has a "select" variant that can specify
> a start-offset and length (or a server-side cursor in the DB-API so the
> full data is not transferred in one "chunk"), and the PostgreSQL DP-API
> supports an "executemany" operation, the threading pseudocode I showed
> could still be used. Instead of queueing single records, one could queue
> a multiple record "chunk" (a "fetchmany" specifying 100, 500, or
> whatever, records); the data would be a list of tuples, so no concerns
> about parsing fields from a text record. Then an "executemany" would
> submit the chunk at one time.
>
> > get() side.  Or is there a better way to go about this detail?  What
> > seems to make sense to me is to stringify the incoming oracle data into
> > some kind of buffer and then read on the postgresql side.
>
>         My view: avoid using any commands that result in formatting the data
> as text reports... Use DB-API interfaces to keep the data as fields.
>
> ocrsr.execute("select * from table")
> while True:
>         batch = ocrsr.fetchmany(100)
>         if not batch: break
>         pcrsr.executemany("insert into table", batch)
>
> {this is a sequential sample -- but using threads just means the ocrsr
> operation are in one thread, batch is the data relayed via a queue, and
> pcrsr operations are in the other thread}
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfraed at ix.netcom.com           wulfraed at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-asst at bestiaria.com)
>                 HTTP://www.bestiaria.com/


Using db-api for this is the wrong approach. COPY FROM, which is the
postgresql equivilent of oracles SQLLoader, is orders of magnitude
faster than sequential inserts, and it's really what you want for bulk
data loads. What you're trying to do is read & write from the file at
the same time, but across a network interface that's just asking for
trouble. In particular, I doubt that postgres expects to have
something writing to the end of the file it is loading and will
probably error out if it hits an unexpected EOF, which is what will
happen if the writer lags behind.

Just dump the files from oracle, copy them, and load them. It'll
probably be faster in the long run when you count all the time you
lose re-starting the processing and troubleshooting your
"optimization".


From nmm1 at cus.cam.ac.uk  Wed Jan 10 13:34:27 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 10 Jan 2007 18:34:27 GMT
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<7x8xga215f.fsf@ruckus.brouhaha.com>
Message-ID: <eo3bjj$cen$1@gemini.csx.cam.ac.uk>


In article <7x8xga215f.fsf at ruckus.brouhaha.com>,
Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
|>
|> > Yes, I know that it is a bit Irish for the best way to use a shared
|> > memory system to be to not share memory, but that's how it is.
|> 
|> But I thought serious MPI implementations use shared memory if they
|> can.  That's the beauty of it, you can run your application on SMP
|> processors getting the benefit of shared memory, or split it across
|> multiple machines using ethernet or infiniband or whatever, without
|> having to change the app code.

They use it for the communication, but don't expose it to the
programmer.  It is therefore easy to put the processes on different
CPUs, and get the memory consistency right.


Regards,
Nick Maclaren.


From simon at brunningonline.net  Fri Jan  5 12:58:42 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 5 Jan 2007 17:58:42 +0000
Subject: Dividing integers...Convert to float first?
In-Reply-To: <12pt3f3kc1jmcf8@corp.supernews.com>
References: <1168017342.255981.134400@11g2000cwr.googlegroups.com>
	<459E8B5C.6020804@gmx.net>
	<mailman.2336.1168018559.32031.python-list@python.org>
	<12pt3f3kc1jmcf8@corp.supernews.com>
Message-ID: <8c7f10c60701050958v7de470f1ob7df27b15cfb4a83@mail.gmail.com>

On 1/5/07, Grant Edwards <grante at visi.com> wrote:
>    >>> from __future__ import LotteryNumbers
>      File "<stdin>", line 1
>    SyntaxError: future feature LotteryNumbers is not defined
>
> Damn.
>
> I guess it's back to work then.

Remember the PEP 8 module name standards.

>>> from __future__ import lottery_numbers
[1, 16, 19, 20, 21, 39]

-- 
Cheers,
Simon B
simon at brunningonline.net


From dfj225 at gmail.com  Wed Jan 10 09:38:48 2007
From: dfj225 at gmail.com (dfj225 at gmail.com)
Date: 10 Jan 2007 06:38:48 -0800
Subject: dynamic library loading, missing symbols
Message-ID: <1168439928.436359.240390@i39g2000hsf.googlegroups.com>

> Did you verify, using nm -D, that the symbol is indeed present in
> the shared object, not just in the source code?

Yes, the symbol is found in the shared object when using nm.

> What flags are given to that dlopen call?

dlopen(lib, RTLD_NOW | RTLD_GLOBAL);


> No. The dynamic linker doesn't search files to resolve symbols; instead,
> it searches the process' memory. It first loads the referenced shared
> libraries (processing the DT_NEEDED records in each one); that uses
> the LD_LIBRARY_PATH. Then, symbol resolution needs to find everything
> in the libraries that have already been loaded.

Ok, so if the linker is searching the process address space, then I
suppose what really comes into play here is how the Python interpreter
dynamically loaded my module, a module which is in turn calling code
that does the dlopen above. If the Python interpreter is not loading
my library as global, does that mean the linker will not find them
when subsequent libraries are loaded?

> There are various ways to control which subset of in-memory symbols
> the dynamic linker considers: the RTLD_GLOBAL/RTLD_LOCAL flags play
> a role, the -Bsymbolic flag given to the static linker has an impact,
> and so does the symbol visibility (hidden/internal/protected).

Ok, any other suggestions for things to try? Since all of the dlopen
calls happen in 3rd party code, I won't really be able to modify them.
I will try looking into more compile time flags for the linker and see
what I can come up with. Keep in mind that this code works when it is
all C++. Only when I add the Boost.Python wrapper to my code and then
import in Python do I get this symbol error.

Thank you for your help,
~Doug



From dotancohen at gmail.com  Wed Jan  3 13:33:47 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Wed, 3 Jan 2007 20:33:47 +0200
Subject: Unsubscribing from the list
In-Reply-To: <engs22$6u3$1@sea.gmane.org>
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>
	<ene064$bm5$1@sea.gmane.org>
	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>
	<enghj3$qhf$1@sea.gmane.org>
	<880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com>
	<engs22$6u3$1@sea.gmane.org>
Message-ID: <880dece00701031033o151cbe76h92a5a5adde51db90@mail.gmail.com>

On 03/01/07, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Robert provided *detailed* instructions, which you ignored.   I quoted
> the same instructions in my reply, which you also ignored.  the sentence
> after the one where you stopped reading also tells you what to do.  one
> might suspect that you don't really want to unsubscribe from this list...
>

I didn't ignore his instructions. I went to the page, and found what I
was looking for. I told him thank you, and explained why I didn't find
it the first time. That was public on the mailing list, go check the
archives. Specifically, the first three messages in this thread.

I haven't yet unsubscribed because I'm waiting for this thread to die.
It's actually rather amusing, because I can't decide if some list
members are genuinly upset at me, or if it is a orm of humour that I
am unfamiliar with. Either way, the thread is entertaining enough that
I remain.

Dotan Cohen

http://lyricslist.com/lyrics/artist_albums/443/seger_bob.html
http://technology-sleuth.com/long_answer/how_can_i_be_safe_online.html


From steve at REMOVEME.cybersource.com.au  Mon Jan 15 22:11:03 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 16 Jan 2007 14:11:03 +1100
Subject: assert versus print [was Re: The curious behavior of
	integer	objects]
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
	<mailman.2744.1168901460.32031.python-list@python.org>
	<pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>
	<mailman.2761.1168915131.32031.python-list@python.org>
Message-ID: <pan.2007.01.16.03.11.02.326034@REMOVEME.cybersource.com.au>

On Mon, 15 Jan 2007 21:38:42 -0500, Calvin Spealman wrote:

> On 1/15/07, Steven D'Aprano <steve at removeme.cybersource.com.au> wrote:
>> On Mon, 15 Jan 2007 17:50:56 -0500, Calvin Spealman wrote:
>>
>> > assert foo(0x10) == 0  # Assertions are much better tests than prints :-)
>>
>> I dispute that assertion (pun intended).
> 
> Hah!
> 
>> Firstly, print statements work even if you pass the -O (optimize) flag
>> to Python. Your asserts don't.
> 
> This is true, but the concept can be adapted to a things like an
> assert_() function.

Hence defeating the optimization :)

So what you're saying is, some custom function that you write yourself is
better than print? I suppose I can't argue with that :)


>> Secondly, a bare assertion like that gives you very little information:
>> it just tells you that it failed:
>>
>> >>> x = 1
>> >>> assert x == 0
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> AssertionError
>>
>> To provide the same information that print provides, you need something
>> like this:
>>
>> assert x == 0, "x == %s not 0" % x
> 
> What information would I need to know if my test passed? Nothing, I say.

Maybe. But then it is hard to tell the difference between "my test
function printed nothing because it is broken, and my test function
printed nothing because it succeeded".

There are good arguments both for and against successful tests printing a
result. Keep in mind that a successful assert doesn't actually print
"nothing" in the interactive interpreter: when it completes, you do get
feedback because Python prints a prompt. Getting feedback that the test
completed successfully is vital. The only question is whether that
feedback should be minimal or verbose.

But in any case, you have misunderstood the assertion. The error message
is printed *if the assert fails*, not if it passes.


> I only want to know when the tests fail, especially as I add more of
> them. Having no output is a great way to know nothing puked.

Sure -- for unit testing. For interactive exploration, seeing the value of
a variable is better than guessing. That's why a bare object reference in
the interactive interpreter prints itself, but in a script does nothing.



-- 
Steven D'Aprano 



From streamservenl at gmail.com  Wed Jan 31 10:58:28 2007
From: streamservenl at gmail.com (jvdb)
Date: 31 Jan 2007 07:58:28 -0800
Subject: Help needed on config files
In-Reply-To: <1170237893.930122.138300@v45g2000cwv.googlegroups.com>
References: <1170237893.930122.138300@v45g2000cwv.googlegroups.com>
Message-ID: <1170259108.904457.44260@a34g2000cwb.googlegroups.com>

Ok, with all your help and very useful hints, i managed to solve it!
thanks!
Now my program loops through the config file, and deletes the files
older than 7 days with a specified extension.
Here's my program:
#this project removes old log files

import os, time
from ConfigParser import ConfigParser
now=time.time()

cfg = ConfigParser()
cfg.read("projects.cfg")

#loop through the config file
for proj in cfg.sections():
    print ""
    #get the path where file files should be
    path = cfg.items(proj)[1][1]
    #get the filetype
    ftype = cfg.items(proj)[0][1]
    print "project: %s, path to old logfiles: %s" % (proj, path)
    dirList=os.listdir(path)
    # Now check if the file is not a dir and then check if the file is
older than 7 days
    for fname in dirList:
        if fname.endswith(ftype):
            pad = path+"\\"+fname
            if os.stat(pad).st_mtime < now - 7 * 86400:
                if os.path.isfile(pad):
                    os.remove(pad)
                    print "The file %s is deleted" % (fname)



===========
#projects.cfg
[ebiz_factuur]
dir=c:\customer\ebiz_factuur
type=.log
[test]
dir=c:\temp
type=.txt



From rpdooling at gmail.com  Mon Jan 22 09:53:12 2007
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 22 Jan 2007 06:53:12 -0800
Subject: GetBoundingMetrics
Message-ID: <1169477592.377844.324590@v45g2000cwv.googlegroups.com>

Hi,

I have been moving from Windows XP to Debian Etch. Most of my
Python scripts work fine with minor modifications. However, I have a
script that launches a browser and goes to various sites using the
Python module webbrowser.open ("url-goes-here")

On Debian Etch, Firefox (or IceWeasel, I guess) opens the sites, but
back in the
commandline window I get repeated messages that say:

GetBoundingMetrics (char *)

Anybody know what's causing that? I don't get it if I just launch
firefox from the commandline. Only when I use the Python module.

Thank you,

rd



From xyzl at example.com  Wed Jan 17 16:14:50 2007
From: xyzl at example.com (xyzl)
Date: Wed, 17 Jan 2007 22:14:50 +0100
Subject: *POLL* How many sheeple believe in the 911 fairy tale and
	willingto accept an Orwellian doublespeak and enslavement world ?
In-Reply-To: <mailman.2842.1169059827.32031.python-list@python.org>
References: <mailman.2842.1169059827.32031.python-list@python.org>
Message-ID: <45ae91b2$0$327$e4fe514c@news.xs4all.nl>

http://www.thebestpageintheuniverse.net/c.cgi?u=911_morons


From ptmcg at austin.rr.com  Sun Jan 21 17:15:33 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 21 Jan 2007 14:15:33 -0800
Subject: pyparsing Combine without merging sub-expressions
In-Reply-To: <D8OdnfDqyvnyHS_YnZ2dnUVZ_syunZ2d@comcast.com>
References: <D8OdnfDqyvnyHS_YnZ2dnUVZ_syunZ2d@comcast.com>
Message-ID: <1169417733.814587.63560@11g2000cwr.googlegroups.com>


Steven Bethard wrote:
> Within a larger pyparsing grammar, I have something that looks like::
>
>      wsj/00/wsj_0003.mrg
>
> When parsing this, I'd like to keep around both the full string, and the
> AAA_NNNN substring of it, so I'd like something like::
>
>      >>> foo.parseString('wsj/00/wsj_0003.mrg')
>      (['wsj/00/wsj_0003.mrg', 'wsj_0003'], {})
>
> How do I go about this? I was using something like::
>
>      >>> digits = pp.Word(pp.nums)
>      >>> alphas = pp.Word(pp.alphas)
>      >>> wsj_name = pp.Combine(alphas + '_' + digits)
>      >>> wsj_path = pp.Combine(alphas + '/' + digits + '/' + wsj_name +
>      ... '.mrg')
>
> But of course then all I get back is the full path::
>
>      >>> wsj_path.parseString('wsj/00/wsj_0003.mrg')
>      (['wsj/00/wsj_0003.mrg'], {})
>
The tokens are what the tokens are, so if you want to replicate a
sub-field, then you'll need a parse action to insert it into the
returned tokens.  BUT, if all you want is to be able to easily *access*
that sub-field, then why not give it a results name?  Like this:

wsj_name = pp.Combine(alphas + '_' + digits).setResultsName("name")

Leave everything else the same, but now you can access the name field
independently from the rest of the combined tokens.

result = wsj_path.parseString('wsj/00/wsj_0003.mrg')
print result.dump()
print result.name
print result.asList()

-- Paul



From no-spam at no-spam-no-spam.invalid  Tue Jan 16 07:06:03 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Tue, 16 Jan 2007 13:06:03 +0100
Subject: why scipy cause my program slow?
In-Reply-To: <1168937877.189713.239360@38g2000cwa.googlegroups.com>
References: <1168935124.912419.147250@a75g2000cwd.googlegroups.com>
	<mailman.2769.1168936472.32031.python-list@python.org>
	<1168937877.189713.239360@38g2000cwa.googlegroups.com>
Message-ID: <eoif3n$ejp$1@news.albasani.net>

HYRY wrote:
> Thanks, by your hint, I change type(data) to type(data[0]), and I get
> <type 'float'>
> <type 'numpy.float64'>
> So, calculate with float is about 5x faster numpy.float64.
> 

approx..
numpy funcs all upcast int to int32 and float to float32 and 
int32/float to float32 etc. This is probably ill behavior.
float32 arrays should only arise if numpy.array(l,dtype=numpy.float32)

In your example you'll best go to numpy/scipy types very early 
(not mixing with the python array type in addition) and do the 
array computations with scipy

left = [abs(x-mean) for x in left]

->

data = scipy.array(f.readframes(t[3]),"h")
..
left = abs(left-mean)

code the test(data) similar - see also scipy.signal.lfilter etc.

and cast types down to Python types late like float(mynumfloat) ...


The type magic and speed loss will and pickle problems will 
probably only disapear, when float & int are handled as extra 
(more conservative) types in numpy - with numpy scalar types only 
on request. Currently numpy uses Python.


Robert


From robert.kern at gmail.com  Tue Jan  9 18:41:51 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 09 Jan 2007 17:41:51 -0600
Subject: distutils and ctypes
In-Reply-To: <45a41b1f$0$19653$9b622d9e@news.freenet.de>
References: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>	<45A3FF17.2070509@v.loewis.de>	<mailman.2497.1168377134.32031.python-list@python.org>
	<45a41b1f$0$19653$9b622d9e@news.freenet.de>
Message-ID: <eo1988$c14$1@sea.gmane.org>

Martin v. L?wis wrote:
> Robert Kern schrieb:
>>> Not sure it's stupid, but I wonder why you want to use ctypes. What's
>>> wrong with extension modules?
>> What's wrong with ctypes? They're both valid, useful approaches to connect to C
>> libraries.
> 
> See the original posting. Distutils doesn't support building arbitrary
> shared libraries, but does support building extension modules.
> 
> Furthermore, extension modules are more type-safe and more expressive
> than loading shared libraries through ctypes. IMO, you may consider
> using ctypes as a last resort - if you have the chance for a
> well-engineered solution, write a compiled wrapper.

To which I say that doing the type-checking and error handling is much easier in
Python than using the C API. Add to that the tediousness of the edit-compile-run
cycle of C and the finickiness of refcounting.

There's nothing *wrong* with either approach. They're just different and have
different strengths and weaknesses. Some of those weaknesses are remediable (say
by using the bdist_shlib command that the OOF2 project implemented) and some aren't.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From hg at nospam.org  Tue Jan 30 09:43:10 2007
From: hg at nospam.org (hg)
Date: Tue, 30 Jan 2007 15:43:10 +0100
Subject: Convert raw data to XML
References: <1170124927.718200.225080@m58g2000cwm.googlegroups.com>
	<mailman.3289.1170133211.32031.python-list@python.org>
	<1170184059.739808.244660@s48g2000cws.googlegroups.com>
	<CyNvh.1384$zH1.1245@newssvr29.news.prodigy.net>
	<1170189278.490020.52670@h3g2000cwc.googlegroups.com>
Message-ID: <MZOvh.8349$uK1.6030@newsfe23.lga>

elrondrules at gmail.com wrote:

> On Jan 30, 12:05 pm, John Nagle <n... at animats.com> wrote:
>> elrondru... at gmail.com wrote:
>> > On Jan 29, 8:54 pm, "Gabriel Genellina" <gagsl... at yahoo.com.ar> wrote:
>>
>> >>En Mon, 29 Jan 2007 23:42:07 -0300, <elrondru... at gmail.com> escribi?:
>> > the reason I wanted to write it as a file was to parse the file, look
>> > for a specific attribute and execute a set of commands based on the
>> > value of the attribute.. also i needed to display the output of the
>> > http post in a more readable format..
>>
>>     That's straightforward.  You confused people by asking the
>> wrong question.  You wrote "Convert raw data to XML", but what
>> you want to do is parse XML and extract data from it.
>>
>>     This will do what you want:
>>
>>        http://www.crummy.com/software/BeautifulSoup/
>>
>> For starters, try
>>
>>         from BeautifulSoup import BeautifulStoneSoup
>>         xmlstring = somexml     ## get your XML into here as one big
>>         string
>>         soup = BeautifulStoneSoup(xmlstring)    # parse XML into tree
>>         print soup.prettify()   # print out in indented format
>>
>> "soup" is a tree structure representing the XML, and there are
>> functions to easily find items in the tree by tag name, attribute,
>> and such.  Work on the tree, not a file with the text of the indented
>> output.
>>
>>                                 John Nagle
> 
> is there any other way to do this without using BeautifulStoneSoup..
> using existing minidom or ext..
> i dont want to install anything new
yes, write it ;-)






From no-spam at no-spam-no-spam.invalid  Mon Jan 15 12:32:52 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Mon, 15 Jan 2007 18:32:52 +0100
Subject: catching signals in an object
In-Reply-To: <7MOqh.18678$sE7.16830@newsfe21.lga>
References: <7MOqh.18678$sE7.16830@newsfe21.lga>
Message-ID: <eogdsf$1p4$1@news.albasani.net>

hg wrote:
> Hi,
> 
> I need to catch a signal "SIGUSR1" in an object ... and I need the signal
> def that traps is to access the object context ... is that possible  ?
> (*nix and windows)
> 
> ex:
> 
> class test:
>         def __init__(self):
>                 self.Set_Signal()
> 
>         def Set_Signal(self):
>                 import signal
>                 signal.signal(..., Func)
>                 def Func(.....):
>                         #I need to get access to self
> 
> 
> or can signal.signal take a method as param ?
> 

Just do it! Python is a functional language.
You have access to self (search for the term "closure") and 
self.method is bound - thus a 'function'

objects are nothing special in Python.


Robert


From fabiofz at gmail.com  Wed Jan 24 06:06:03 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Wed, 24 Jan 2007 09:06:03 -0200
Subject: Pydev 1.2.6 Released
Message-ID: <cfb578b20701240306o7ccb1edau3a730dbd7c852752@mail.gmail.com>

Hi All,

Pydev and Pydev Extensions 1.2.6 have been released

Details on Pydev Extensions: http://www.fabioz.com/pydev
Details on Pydev: http://pydev.sf.net
Details on its development: http://pydev.blogspot.com

Release Highlights in Pydev Extensions:
-----------------------------------------------------------------

*  Added refactoring support for rename (still BETA, so, don't forget to
review your changes before applying them)
      - Keybinding: Alt+Shift+R
      - Supports preview
      - Integrated in the editor (but not in the package explorer, so, it
can rename a module, but only through an import to that module)
      - Supports undo/redo in the workspace
      - Rename class
      - Rename method
      - Rename attribute
      - Rename imports
      - Rename local variable
* Menu changes:
      - Now the debug/navigate actions are all under a 'Pydev' menu
      - The pydev navigate action is now only initially shown in the
pydev/debug perspective
      - The pydev remote debugging actions are now only initially shown in
the debug perspective
* Fix: code analysis problem when working with nested list-comprehensions
* Fix: go to definition sometimes failed to find module definitions


Release Highlights in Pydev:
----------------------------------------------

* Pydev package explorer (Still BETA, so, use it with care -- the navigator
is still the preferred way of browsing your project)
      - Filters for .pyc and .pyo files created
      - Working set integration added (just available for Eclipse 3.2.1)
      - Some minor bugs fixed
* Patch by Olof Wolgast: The 'create docstrings' assistant has more options
(windows > preferences > pydev > code formatter > docstrings)
      - Option to choose between single and double quotes
      - Option to create '@type' too and not only '@param'
      - Option to skip creation of the @type tag for parameters starting
with some prefix (if 'Custom' is chosen)
* Block comments now have more options (windows > preferences > pydev > code
formatter > block comments)
      - Option to align single-line block comment to the left or right
      - Option to put class name above class if applied on a class
definition
* Fix: Multi-line Templates indent correctly
* Fix: When a file from a project that was deleted was still opened inside
pydev, Eclipse would not start-up correctly
* Fix: When a different interpreter is chosen in the run dialog, the
pythonpath is correctly gotten
* Fix: when Pydev was started, it would re-save the .pydevproject file even
if no change was done
* Fix: When tab width was set to 0 it could halt the editor (now if 0 is
set, 4 is assumed)
* Grammar Patch by Ueli Kistler, Dennis Hunziker




What is PyDev?
---------------------------

PyDev is a plugin that enables users to use Eclipse for Python and Jython
development -- making Eclipse a first class Python IDE -- It comes with many
goodies such as code completion, syntax highlighting, syntax analysis,
refactor, debug and many others.


Cheers,

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
http://www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

Pydev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070124/e1382de0/attachment.html>

From gagsl-py at yahoo.com.ar  Sun Jan  7 14:29:19 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 11:29:19 -0800
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <nKboh.11774$ZT3.8998@newssvr19.news.prodigy.com>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
	<mailman.2332.1168016502.32031.python-list@python.org>
	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>
	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>
	<yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>
	<mailman.2367.1168100759.32031.python-list@python.org>
	<fK_nh.25689$QU1.17301@newssvr22.news.prodigy.net>
	<w03oh.46$_k2.22@read3.inet.fi>
	<P69oh.32493$Gr2.29258@newssvr21.news.prodigy.net>
	<1168194009.220437.286210@q40g2000cwq.googlegroups.com>
	<nKboh.11774$ZT3.8998@newssvr19.news.prodigy.com>
Message-ID: <1168198159.798783.168010@i15g2000cwa.googlegroups.com>

On 7 ene, 16:20, "W. Watson" <wolf_tra... at invalid.com> wrote:

> We seem to be looping. I have the Python interpreter. I would like the
> pythonwin editor. The download link doesn't work on SourceForge. Where can I
> get it? If not there, where? If it can't be obtained, then I'll go to the
> default editor built into python-2.5.msi.

It *does* work for me. Try
https://sourceforge.net/project/showfiles.php?group_id=78018&package_id=79063

-- 
Gabriel Genellina



From redefined.horizons at gmail.com  Fri Jan  5 12:19:12 2007
From: redefined.horizons at gmail.com (redefined.horizons at gmail.com)
Date: 5 Jan 2007 09:19:12 -0800
Subject: Adding a directory to the Python System Path - Edit the registry?
Message-ID: <1168017552.010631.276080@s34g2000cwa.googlegroups.com>

I have been trying to find a way to add a directory to Python's sytem
path on my MS Windows XP computer. I did some searching online, but the
only solution I found involved editing the MS Windows Registry. That
seemed a little to hard core. Is there another easier way to do this?

Thanks,

Scott Huey



From michele.simionato at gmail.com  Thu Jan 25 00:39:55 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 24 Jan 2007 21:39:55 -0800
Subject: ANN: Dejavu 1.5.0RC1
In-Reply-To: <mailman.3122.1169680178.32031.python-list@python.org>
References: <mailman.3122.1169680178.32031.python-list@python.org>
Message-ID: <1169703594.951755.180990@m58g2000cwm.googlegroups.com>

On Jan 24, 11:57 pm, "Robert Brewer" <fuman... at amor.org> wrote:
> The Dejavu Object-Relational Mapper (version 1.5.0RC1) is now available
> and in the public domain. Get it athttp://projects.amor.org/dejavu,
> or from PyPI:http://www.python.org/pypi/Dejavu/1.5.0RC1.

I am curious ... how this compare to SQLAlchemy?

   Michele Simionato



From steveo at eircom.net  Tue Jan  9 11:33:44 2007
From: steveo at eircom.net (Steve O'Hara-Smith)
Date: Tue, 9 Jan 2007 16:33:44 +0000
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
	<sfop5f7iqbcn$.fbeygwxvfsx0.dlg@40tude.net>
Message-ID: <20070109163344.7f5ff833.steveo@eircom.net>

On Tue, 9 Jan 2007 15:25:43 +0000
zoara <me17 at privacy.net> wrote:

> On 9 Jan 2007 06:58:15 -0800, octabox at gmail.com wrote:
> 
> > Hello all,
> > 
> > I represent Octabox, an Internet Start-up developing a wide-scale

<snip>

> Well, that was too tempting to pass up. Amusing answers related to dirty
> bastard time-wasting spammers duly entered and submitted.

	Yes it was - and may they get many more similar responses :)

-- 
C:>WIN                                      |   Directable Mirror Arrays
The computer obeys and wins.                | A better way to focus the sun
You lose and Bill collects.                 |    licences available see
                                            |    http://www.sohara.org/


From http  Sun Jan  7 22:21:04 2007
From: http (Paul Rubin)
Date: 07 Jan 2007 19:21:04 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
	<7xd55rzke9.fsf@ruckus.brouhaha.com>
	<slrneq2055.tcj.grahn+nntp@frailea.sa.invalid>
	<mailman.2388.1168181437.32031.python-list@python.org>
	<7x3b6mzwkl.fsf@ruckus.brouhaha.com>
	<1168189375.843789.306180@51g2000cwl.googlegroups.com>
Message-ID: <7xps9q19wf.fsf@ruckus.brouhaha.com>

"Paul Boddie" <paul at boddie.org.uk> writes:
> > Consider that the above three class definitions might be in separate
> > files and you see how clumsy this gets.
> 
> What are you trying to show with the above? The principal benefit of
> using private attributes set on either the class or the instance is to
> preserve access, via self, to those attributes defined in association
> with (or within) a particular class in the inheritance hierarchy, as
> opposed to providing access to the "most overriding" definition of an
> attribute. This is demonstrated more effectively with a method on class A:

Right, the problem is if those methods start changing the "private"
variable.  I should have been more explicit about that.

class A:
   def __init__(self):
      self.__x = 3
   def foo(self):
      return self.__x

class B(A): pass

class A(B):
   def bar(self):
     self.__x = 5   # clobbers private variable of earlier class named A


From py at th.on  Tue Jan 23 12:25:24 2007
From: py at th.on (py)
Date: Tue, 23 Jan 2007 17:25:24 GMT
Subject: smtplib starttls gmail example
Message-ID: <8yrth.1230$JB.276@trnddc05>

from smtplib import SMTP
from socket import sslerror         #if desired
server = SMTP('smtp.gmail.com')
server.set_debuglevel(0) # or 1 for verbosity
server.ehlo('youraddress at gmail.com')
server.starttls()
server.ehlo('youraddress at gmail.com')  # say hello again
server.login('youraddress at gmail.com', 'yourpassword')
# i have a suspicion that smptlib does not add the required newline dot newline so i do it myself
server.sendmail('youraddress at gmail.com', 're at cipient.com', message_text + '\n.\n')
# next line generates the ignorable socket.sslerror
server.quit()




From http  Sat Jan  6 20:38:06 2007
From: http (Paul Rubin)
Date: 06 Jan 2007 17:38:06 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
Message-ID: <7xd55rzke9.fsf@ruckus.brouhaha.com>

"BJ?rn Lindqvist" <bjourne at gmail.com> writes:
> It is given that emphasizing private data (encapsulation) leads to
> more internal complexity and more lines of code because you have to
> write getters and setters and stuff.

You can have public variables in Java if you choose to.  Writing
private variables with public setters and getters is just a style choice.

> Or do you have anecdotal evidence of where data encapsulation saved
> your ass?

There are certainly applications that can't live without it, like
browser applets.

As for it saving my ass, there's no way to know, it's like asking
whether garbage collection has saved my ass.  Yes I've had plenty of
pointer related bugs in C programs that don't happen in GC'd
languages, so GC in that sense saves my ass all the time.  I've also
had bugs in Python programs that would have been prevented by better
use of encapsulation (including in the stdlib).  Python certainly
makes you spend more of your attention worrying about possible
attribute name collisions between classes and their superclasses.  And
Python's name mangling scheme is leaky and bug-prone if you ever
re-use class names.  Overall, I think Python would gain from having
better support for encapsulation and C++-like casting between class
instances.


From zgolus at gmail.com  Mon Jan 15 07:39:21 2007
From: zgolus at gmail.com (zgolus at gmail.com)
Date: 15 Jan 2007 04:39:21 -0800
Subject: Conditional validation of documents (ignoring IDREFs)
Message-ID: <1168864761.033799.285500@51g2000cwl.googlegroups.com>

I'm working with one extra large XML file which consists of many parts.
Every part can be considered a stand-alone document with references to
other parts (IDs and IDREFs). I would like to be able to validate every
such part against a DTD but ignoring errors which arise from broken
references. Can I do it with pyxml?

Thanks in advance!



From gagsl-py at yahoo.com.ar  Tue Jan 16 12:07:17 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 16 Jan 2007 14:07:17 -0300
Subject: Search Queue
References: <1168960945.787822.286690@s34g2000cwa.googlegroups.com><1168962673.664083.146220@38g2000cwa.googlegroups.com>
	<1168964356.125262.45110@v45g2000cwv.googlegroups.com>
Message-ID: <eoj0nn$vgd$1@sea.gmane.org>

"abcd" <codecraig at gmail.com> escribi? en el mensaje 
news:1168964356.125262.45110 at v45g2000cwv.googlegroups.com...

> Yea basically I need Queue like functionality with the ability to
> search for a particular instance in it.  I guess I could just use a
> list and search it as needed.

Perhaps the Queue class should be called ThreadQueue, or be contained in the 
threading module, or something like that. The current name is misleading.

-- 
Gabriel Genellina




From martin at v.loewis.de  Wed Jan 24 02:35:42 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 24 Jan 2007 08:35:42 +0100
Subject: What's the reverse of Py_BuildValue("u#" ?
In-Reply-To: <1169605378.718701.229310@d71g2000cwa.googlegroups.com>
References: <1169605378.718701.229310@d71g2000cwa.googlegroups.com>
Message-ID: <45b70c4e$0$30347$9b622d9e@news.freenet.de>

sndive at gmail.com schrieb:
> How could I get the pointer to and the length of ucs2 array out of a 
> PyObject representing a string? Something that works whether PyObject
> string is in unicode or not.

You can use PyObject_Unicode(o) to convert the object to Unicode first,
then use PyUnicode_AsUnicode to convert it to a Py_UNICODE array, and
PyUnicode_GetSize to find out what the length is. Notice that this will
be UCS-2 only if Py_UNICODE is 16 bits on your platform. If you really
want UCS-2 always, you need to convert the string again using
PyUnicode_AsEncodedObject, then PyString_AsString to find out what
the UCS-2 bytes are.

Remember to check for errors for all these functions, and remember
to decref the results when you don't need them any longer.

> 
> Also could I replace a sequence
> 
>    if(PyBool_Check(obj)) {
>...
>    }
>    if(PyString_Check(obj)) { // would this be true for any string
>type?
>...
>    }
>    if(PyFloat_Check(obj)) {
>...
> with a switch?

Not easily. Also, PyString_Check is true only for the byte string
type (and its subtypes).

Regards,
Martin


From nospam at riddergarn.dk  Mon Jan 29 07:12:58 2007
From: nospam at riddergarn.dk (Scripter47)
Date: Mon, 29 Jan 2007 13:12:58 +0100
Subject: IP address
In-Reply-To: <1170039052.541186.326990@j27g2000cwj.googlegroups.com>
References: <mailman.3244.1169978684.32031.python-list@python.org>	<ephtph$fcl$1@minji.szn.dk>
	<1170039052.541186.326990@j27g2000cwj.googlegroups.com>
Message-ID: <45BDE4CA.3060800@riddergarn.dk>

Beej skrev:
> On Jan 28, 2:26 am, Klaus Alexander Seistrup <k... at seistrup.dk> wrote:
>> Scripter47 wrote:
>>> How do i get my ip address?
>>> in cmd.exe i just type "ipconfig" then it prints:
>>>       ...
>>>       IP-address . . . . . . . . . . . . . . . . . : 192.168.1.10
>>>       ...
>>> how can i do that in python??#v+
>> python -c 'import re, urllib; print re.findall("<title>Your IP: (.+?)</title>", urllib.urlopen("http://myip.dk/").read())[0]'
> 
> This is extremely unlikely to return 192.168.1.10. :-)
> 
> (It will give you the address of your firewall or whatever is your 
> gateway to the outside world...  which is a cool thing to know, but 
> I'm not sure it's what the op's after.)
> 
> -Beej
> 

Exactly i wnat my local ip. sorry if i din't tell that ;)



From horpner at yahoo.com  Tue Jan  9 14:09:43 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 9 Jan 2007 20:09:43 +0100
Subject: A simple lexer
Message-ID: <slrneq7q95.1l0.horpner@FIAD06.norwich.edu>

I'm a royal n00b to writing translators, but you have to start
someplace.

In my Python project, I've decided that writing the dispatch code
to sit between the Glulx virtual machine and the Glk API will be
best done automatically, using the handy prototypes.

Below is the prototype of the lexer, and I'd like some comments
in case I'm doing something silly already.

My particular concern are: 

The loop checks for each possible lexeme one at a time, and has
rather lame error checking.

I made regexes for matching a couple of really trivial cases for
the sake of consistency. In general, is there a better way to use
re module for lexing.

Ultimately, I'm going to need to build up an AST from the lines,
and use that to generate Python code to dispatch Glk functions. I
realize I'm throwing away the id of the lexeme right now;
suggestions on the best way to store that information are
welcome.

I do know of and have experimented with PyParsing, but for now I
want to use the standard modules. After I understand what I'm
doing, I think a PyParsing solution will be easy to write.

import re

def match(regex, proto, ix, lexed_line):
    m = regex.match(proto, ix)
    if m:
        lexed_line.append(m.group())
        ix = m.end()
    return ix

def parse(proto):
    """ Return a lexed version of the prototype string. See the
    Glk specification, 0.7.0, section 11.1.4

	>>> parse('0:')
	['0', ':']
	>>> parse('1:Cu')
	['1', ':', 'Cu']
	>>> parse('2<Qb:Cn')
	['2', '<', 'Qb', ':', 'Cn']
	>>> parse('4Iu&#![2SF]>+Iu:Is')
	['4', 'Iu', '&#!', '[', '2', 'S', 'F', ']', '>+', 'Iu', ':', 'Is']
    """
    arg_count = re.compile('\d+')
    qualifier = re.compile('[&<>][+#!]*')
    type_name = re.compile('I[us]|C[nus]|[SUF]|Q[a-z]')
    o_bracket = re.compile('\\[')
    c_bracket = re.compile('\\]')
    colon = re.compile(':')
    ix = 0
    lexed_line = []
    m = lambda regex, ix: match(regex, proto, ix, lexed_line)
    while ix < len(proto):
        old = ix
        ix = m(arg_count, ix)
        ix = m(qualifier, ix)
        ix = m(type_name, ix)
        ix = m(o_bracket, ix)
        ix = m(c_bracket, ix)
        ix = m(colon, ix)
        if ix == old:
            print "Parse error at %s of %s" % (proto[ix:], proto)
            ix = len(proto)
    return lexed_line

if __name__ == "__main__":
    import doctest
    doctest.testmod()

-- 
Neil Cerutti
We dispense with accuracy --sign at New York drug store


From corsairdgr at aol.com  Mon Jan 15 12:35:06 2007
From: corsairdgr at aol.com (corsairdgr at aol.com)
Date: Mon, 15 Jan 2007 12:35:06 -0500
Subject: can't get import to work!
Message-ID: <8C906E2A183C0C2-B34-FE5@WEBMAIL-RA03.sysops.aol.com>

 I am brand new to jython/python.
 
 I want to use my own Java class from within a Jython script.
 
 In Java, I created a class called Fubar and put this in a jar file called testit.jar.
 The Fubar class is in the just.for.fun package and this path shows up in the
 testit.jar file. I then modified the jython.bat file (I'm using windows) to include
 the testit.jar file in the classpath. When jython starts from the command line,
 it notices testit.jar and generates some cache information.
 
 Next I want to use the Fubar class in a jython script. I start jython from the command line and type:
 
 from just.for.fun import Fubar
 This doesn't work. The following error is displayed:
 ImportError: No module named for
 
 I also try
 
 import just.for.fun.Fubar
 
 This gives the same error.
 
 I can enter import java.util.HashMap and other such imports and these work. 
 
 Can someone please tell me what I could be doing wrong ?
 
 Thanks,
 
 
 
  
________________________________________________________________________
Check out the new AOL.  Most comprehensive set of free safety and security tools, free access to millions of high-quality videos from across the web, free AOL Mail and more.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070115/be8b0fa3/attachment.html>

From gatis.tomsons at gmail.com  Wed Jan 10 04:46:41 2007
From: gatis.tomsons at gmail.com (Gacha)
Date: 10 Jan 2007 01:46:41 -0800
Subject: pyExcelerator big integer values
In-Reply-To: <45a42e7c@news.eftel.com>
References: <1168349446.381187.65810@11g2000cwr.googlegroups.com>
	<45a42e7c@news.eftel.com>
Message-ID: <1168422401.594651.278390@i39g2000hsf.googlegroups.com>

Thank you, the repr() function helped me a lot.

v = unicode(values[(row_idx, col_idx)])
if v.endswith('e+12'):
    v = repr(values[(row_idx, col_idx)])



From fsckedagain at gmail.com  Wed Jan  3 18:53:01 2007
From: fsckedagain at gmail.com (fscked)
Date: 3 Jan 2007 15:53:01 -0800
Subject: minidom utf-8 encoding
Message-ID: <1167868380.481121.154880@42g2000cwt.googlegroups.com>

Hi guys/gals.

I am trying to write and xml file from data parsed from a csv.

I can get everything to work except that I cannot get minidom to do -->
? which needless to say is driving me nuts.

Any suggestions?

What it ends up doing is just removing the character from the
datastream.



From __peter__ at web.de  Tue Jan 30 10:47:23 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 30 Jan 2007 16:47:23 +0100
Subject: Help me override append function of list object
References: <1170171317.866549.261060@a34g2000cwb.googlegroups.com>
Message-ID: <epnp99$sqn$01$1@news.t-online.com>

jeremito wrote:

> I have created a class that inherits from the list object.  I want to
> override the append function to allow my class to append several
> copies at the same time with one function call.  I want to do
> something like:
> 
> import copy
> 
> class MyList(list):
>   __init__(self):
>     pass
> 
>   def append(self, object, n=1):
>     for i in xrange(n):
>         self.append(copy.copy(object))
> 
> Now I know this doesn't work because I overwrite append, but want the
> original functionality of the list object.  Can someone help me?

Use list.append(self, obj) or super(MyList, self).append(obj), e. g.:

>>> import copy
>>> class List(list):
...     def append(self, obj, n=1):
...             for i in xrange(n):
...                     super(List, self).append(copy.copy(obj))
...
>>> items = List()
>>> items.append(42, 3)
>>> items
[42, 42, 42]

Peter


From bruno.desthuilliers at gmail.com  Mon Jan 15 07:27:55 2007
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: 15 Jan 2007 04:27:55 -0800
Subject: Python web app. (advice sought)
In-Reply-To: <45aae51b.0@entanet>
References: <45aae51b.0@entanet>
Message-ID: <1168864075.878863.172950@38g2000cwa.googlegroups.com>


Duncan Smith a ?crit :
> Hello,
>      I find myself in the, for me, unusual (and at the moment unique)
> position of having to write a web application.  I have quite a lot of
> existing Python code that will form part of the business logic.  This
> relies on 3rd party libraries (such as numpy) which would make porting
> to e.g. IronPython difficult (I would imagine).  I was thinking LAMP
> (the P standing for Python, of course), particularly as I was originally
> encouraged to go for open source solutions.
>
> The application will provide some basic statistical analyses of data
> contained in database tables and associated plots (R / matplotlib /
> graphviz).  There will also be some heavier duty Monte Carlo simulation
> and graphical modelling / MCMC.  The user(s) will need to be able to set
> model parameters; maybe even tinker with model structure, so it will be
> very interactive (AJAX?).
>
> I've had a look at Django, Turbogears and Plone, and at the moment I am
> torn between Turbogears and Plone.  I get the impression that Turbogears
> will require me to write more non-Python code,

???

> but maybe Plone is more
> than I need (steeper learning curve?).  Maybe Turbogears will lead to a
> more loosely coupled app. than Plone?

Plone is nice for content management (well, it's a CMS, isn't it ?),
but I certainly wouldn't choose it for the kind off application you are
describing. A simpler, lighter MVC framework would be far more
appropriate IMHO. Turbogears may be a good choice, but you may also
want to have a look at web.py and Pylons.

> The disconcerting thing is that others on the project (who won't be
> developing) have started to talk about a LAMP back end with an IIS front
> end, .NET, and the benefits of sharepoint.

My my my...

>  The emphasis is supposed to
> be on rapid development, and these technologies are supposed to help.
> But I have no real familiarity with them at all; just Python, C and SQL
> to any realistic level of competence.

Then go for the simplest thing.
 
My 2 cents...



From jarausch at skynet.be  Tue Jan  2 12:16:28 2007
From: jarausch at skynet.be (Helmut Jarausch)
Date: Tue, 02 Jan 2007 18:16:28 +0100
Subject: python2.5 frameobject - how to upgrade?
In-Reply-To: <mailman.2204.1167749700.32031.python-list@python.org>
References: <459a6894$0$9322$ba620e4c@news.skynet.be>
	<mailman.2204.1167749700.32031.python-list@python.org>
Message-ID: <459A936C.4090609@skynet.be>

skip at pobox.com wrote:
>     Helmut> I'd like to install a package ('rekall') which uses
>     Helmut> frame->f_nlocals which is no longer contained in frameobject.h.
> 
>     Helmut> What's the recommended way to upgrade such an application?
> 
> I suspect PySequence_Length(frame->f_locals) will do the trick.

Yes, thanks, that fixed it,
Happy New Year to you.

A personal question: Have you converted from Perl to Python, as well?

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From gagsl-py at yahoo.com.ar  Fri Jan 19 11:45:44 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 13:45:44 -0300
Subject: PQueue and Python 2.5
References: <1169216890.617239.209170@51g2000cwl.googlegroups.com>
Message-ID: <eoqsmg$8qf$2@sea.gmane.org>

"Berteun Damman" <berteun at gmail.com> escribi? en el mensaje 
news:1169216890.617239.209170 at 51g2000cwl.googlegroups.com...

> Recently I was looking for a Priority Queue module, and I've found
> Pqueue by Andrew Snare [1].
That appears to be rather ancient, from 1999. Is it a pure Python 
implementation or has some C code too?

Python got in 2.3 a heapq module in its standard library; I think it is what 
you want, no need for an additional module.

> *** glibc detected *** free(): invalid pointer: 0x00002ad7b5720288 ***
> Abort
>
> And on my PowerBook:
> python2.5(8124) malloc: ***  Deallocation of a pointer not malloced:
> 0x3b4218; This could be a double free(), or free() called with the
> middle of an allocated block;
>
> A memory fault can also be immediately triggered by apply 'del' to a
> PQueue-instance. As said, with Python 2.4 it seems to perform without
> problems.

Ah! then I bet:
- There is some C code involved.
- It carelessly mixes PyMem_Malloc with PyObject_Free or similar as 
described in
http://docs.python.org/whatsnew/ports.html

So do yourself a favor and forget about such old piece of code...

-- 
Gabriel Genellina 




From scolnik at fibertel.com.ar  Fri Jan 12 05:29:57 2007
From: scolnik at fibertel.com.ar (scolnik)
Date: Fri, 12 Jan 2007 07:29:57 -0300
Subject: Integer solutions to linear equation?
Message-ID: <000601c73634$9bb63f40$0200a8c0@scolnik>

The answer to your integer solutions problem can be found in

http://www.alpertron.com.ar/QUAD.HTM

Best

Hugo Scolnik

Imagination is more important than knowledge.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070112/548b6e4c/attachment.html>

From gagsl-py at yahoo.com.ar  Sun Jan  7 15:35:42 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 12:35:42 -0800
Subject: Why less emphasis on private data?
In-Reply-To: <9dboh.11767$ZT3.426@newssvr19.news.prodigy.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
	<9dboh.11767$ZT3.426@newssvr19.news.prodigy.com>
Message-ID: <1168202142.393267.65940@i15g2000cwa.googlegroups.com>

On 7 ene, 16:13, John Nagle <n... at animats.com> wrote:

>      Because Python doesn't have explicit declarations, scope of variables is
> a touchy issue.  If you write "x = 1" within a function, that will
> create a local "x" if "x" doesn't exist, or alter a global "x" if "x" was
> previously created in the global context.  But at least global variables
> are local to the namespace; we don't have clashes across files.  
No, `x=1` always uses a local variable x, unless an (explicit!) global
statement was in effect in the same block. This, and the explicit self,
make very clear which x you are referring to.

-- 
Gabriel Genellina



From ziga.seilnacht at gmail.com  Mon Jan  8 13:16:54 2007
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 8 Jan 2007 10:16:54 -0800
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk>
	<entkru$2vs$1@gemini.csx.cam.ac.uk>
	<50f5snF1fb5uqU2@mid.individual.net>
	<entpo0$d0g$1@gemini.csx.cam.ac.uk>
	<mailman.2425.1168272626.32031.python-list@python.org>
	<enttq6$lj2$1@gemini.csx.cam.ac.uk>
	<1168277798.302236.184180@s34g2000cwa.googlegroups.com>
	<enu0pu$rj0$1@gemini.csx.cam.ac.uk>
Message-ID: <1168280213.382178.228020@11g2000cwr.googlegroups.com>

Nick Maclaren wrote:

> Well, it's not felt necessary to distinguish those at top level, so
> why should it be when they are in a sequence?

Well, this probably wasn't the best example, see the links below
for a better one.

> But this whole thing is getting ridiculous.  The current implementation
> is a bizarre interpretation of the specification, but clearly not an
> incorrect one.  It isn't important enough to get involved in a religious
> war over - I was merely puzzled as to the odd behaviour, because I have
> to teach it, and it is the sort of thing that can confuse naive users.

There was a recent bug report identical to your complaints, which
was closed as invalid. The rationale for closing it was that things
like:

print ("a, bc", "de f,", "gh), i")

would be extremely confusing if the current behaviour was changed. See
http://www.python.org/sf/1534769
for details.

Ziga



From gert.cuykens at gmail.com  Sun Jan 21 20:58:31 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Mon, 22 Jan 2007 02:58:31 +0100
Subject: instancemethod
In-Reply-To: <ef60af090701211712u4d5a520q84c8e86c898bc649@mail.gmail.com>
References: <ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a@mail.gmail.com>
	<ep110v$t04$1@sea.gmane.org>
	<ef60af090701211712u4d5a520q84c8e86c898bc649@mail.gmail.com>
Message-ID: <ef60af090701211758s4e10back9203edefb97328e3@mail.gmail.com>

On 1/22/07, Gert Cuykens <gert.cuykens at gmail.com> wrote:
> On 1/22/07, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> > "Gert Cuykens" <gert.cuykens at gmail.com> escribi? en el mensaje
> > news:ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a at mail.gmail.com...
> >
> > > class Db:
> > >
> > >    _db=-1
> > >    _cursor=-1
> > >
> > >    @classmethod
> > >    def __init__(self,server,user,password,database):
> > >        self._db=MySQLdb.connect(server , user , password , database)
> > >        self._cursor=self._db.cursor()
> > >
> > >    @classmethod
> > >    def excecute(self,cmd):
> > >        self._cursor.execute(cmd)
> > >        self._db.commit()
> > >
> > >
> > > if __name__ == '__main__':
> > >    gert=Db('localhost','root','******','gert')
> > >    gert.excecute('select * from person')
> > >    for x in range(0,gert.rowcount):
> > >        print gert.fetchone()
> > >    gert.close()
> >
> > Besides your specific question that was already answered, why are you using
> > classmethods at all?
> > You are constructing a Db instance and using it as if all were normal
> > instance methods... Just remove all those @classmethod declarations and use
> > it in a standard way.
> >
> > --
> > Gabriel Genellina
> >
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
> i thought @classmethod was the normal method ?
>

did some reading and i think i know why now :)

http://www.faqts.com/knowledge_base/view.phtml/aid/16824

python always seems to amaze me how other languages make a mess of
things that suppose to be simple

From tjreedy at udel.edu  Sat Jan  6 00:29:48 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 6 Jan 2007 00:29:48 -0500
Subject: I will be proposing this PEP
References: <4c0048df0701051459m7abf0662r69060ce9faff6bc4@mail.gmail.com>
Message-ID: <ennc4d$v6p$1@sea.gmane.org>


"Collin Stocks" <collinstocks at gmail.com> wrote in message 
news:4c0048df0701051459m7abf0662r69060ce9faff6bc4 at mail.gmail.com...
| Attached is a PEP which I will be proposing soon. If you have any 
questions,
| comments, or suggestions, please email them to me with the subject 
"Adding
| Built-in Class Attributes PEP"

I believe that properties were added for new-style classes to address the 
issues you address.  You make no mention of them.  Old style classes will 
disaappear in the future.

tjr





From pkyoung at gmail.com  Wed Jan 24 03:12:35 2007
From: pkyoung at gmail.com (auditory)
Date: Wed, 24 Jan 2007 17:12:35 +0900
Subject: numpy or _numpy or Numeric?
In-Reply-To: <1169625580.411463.216040@s48g2000cws.googlegroups.com>
References: <ep71iq$26m$1@news.kreonet.re.kr>
	<1169625580.411463.216040@s48g2000cws.googlegroups.com>
Message-ID: <ep74dg$3jf$1@news.kreonet.re.kr>

George Sakkis ? ?:
> On Jan 24, 2:24 am, auditory <pkyo... at gmail.com> wrote:
> 
>> I am a newbie here
>>
>> I am trying to read "space separated floating point data" from file
>>
>> I read about csv module by searching this group,
>> but I couldn't read space separated values with csv.
>> (which may be matter of course..)
>>
>> I also read about numpy.fromfile(file, sep=' ') which i can use.
>> but on my machine(ubuntu linux) numpy is unknown module,
>> which I didn't install by myself.
>>
>> While trying to install numpy accroding to its homepage.
>> (http://numpy.scipy.org/numpydoc/numdoc.htm).
>> i am quite confused.
>>
>> it's talking about the Numerical Python,
>> and it says to test whether it is installed or not,
>> try import Numeric instead of numpy.
>>
>> I got Nurmeric modules and
>> as a matter of fact i got a file named '_numpy.so' in lib directory.
>>
>> I can import _numpy but _numpy does not have 'fromfile' method
>>
>> My question is:
>> 1. Do i need to install numpy module?
>> 2. Then Is it different from Numeric module?
>> 3. Then where can i get it?
>>
>> 4. Or what is general way to read 'space separated values' from file?
>>
>> Thanks in advance.
> 
> If *all* you need is to read a space-separated file with floating point
> values, installing numpy (or Numeric or numarray..) is an overkill; you
> can do it in one line in pure Python:
> 
> matrix = [map(float, line.split()) for line in
> open('my_space_separated_file.txt')]
> 
> This stores the values as a list of lists, each list corresponding to a
> row in the file. Depending on what you plan to do next with these
> numbers, this may or may not be the best way to go about it, but since
> you only mentioned the file reading part, we can't assume much.
> 
> George
> 
Thanks a lot for your 'elegant' suggestion.
As a next step i wish to do some math with matrix and produce a vector
and write it on a file. (in fact math is just averaging now)

I hope i can do this with a little more efforts.



From jstroud at mbi.ucla.edu  Mon Jan 15 17:44:33 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 15 Jan 2007 14:44:33 -0800
Subject: whats wrong with my reg expression ?
In-Reply-To: <mailman.2743.1168900867.32031.python-list@python.org>
References: <mailman.2743.1168900867.32031.python-list@python.org>
Message-ID: <eoh04h$2vf$1@zinnia.noc.ucla.edu>

Gert Cuykens wrote:
> rex2=re.compile('^"(?P<value>[^]*)"$',re.M)
> 
>  File "/usr/lib/python2.5/re.py", line 180, in compile
>    return _compile(pattern, flags)
>  File "/usr/lib/python2.5/re.py", line 233, in _compile
>    raise error, v # invalid expression
> sre_constants.error: unexpected end of regular expression
> 
> ?
You probably want

rex2=re.compile('^"(?P<value>[\^]*)"$',re.M)

Because [] is a bracketed group and the ^ within a bracketed group is a 
negation, but you have negated nothing before closing the group.
Alternatively:

rex2=re.compile('^"(?P<value>\^*)"$',re.M)

Would have the same meaning, avoiding the bracketed group altogether.

James


From cliff at develix.com  Sat Jan 13 16:18:24 2007
From: cliff at develix.com (Cliff Wells)
Date: Sat, 13 Jan 2007 13:18:24 -0800
Subject: template engine
In-Reply-To: <pan.2007.01.13.19.04.17.189220@gmail.com>
References: <pan.2007.01.13.18.29.24.499240@gmail.com>	<8764ba7oqf.fsf@gmail.com>
	<pan.2007.01.13.19.04.17.189220@gmail.com>
Message-ID: <45A94CA0.3010604@develix.com>

piotr wrote:
> On Sat, 13 Jan 2007 16:42:16 -0200, Jorge Godoy wrote:
> 
>> Take a look at Kid (http://www.kid-templating.org/) and Genshi
>> (http://genshi.edgewall.org/).
> 
> I've already done a short look at kid, but to be honest I don't like it's
> XML/Python syntax. I strongly prefer idea from SimpleTAL or HTMLTemplates
> where HTML and Python code are separated.
> But syntax is for me not so important like functionality so maybe I have
> to get back and look at kid again :)
> 
> any other engines? :)

Perhaps Breve might interest you:

http://breve.twisty-industries.com

Regards,
Cliff



From john.pye at gmail.com  Sat Jan  6 17:32:58 2007
From: john.pye at gmail.com (John Pye)
Date: 6 Jan 2007 14:32:58 -0800
Subject: Crash on
Message-ID: <1168122778.304660.92870@q40g2000cwq.googlegroups.com>

Hi all

I have a unittest test suite that's testing a fairly large SWIG-wrapped
application via Python. All my tests are passing at the moment, but
when Python exits, I get the following (shown below).

Could anyone please help me to understand what precisely this message
means (other than that obviously I have made a mistake with object
ownership or INCREF or DECREF somewhere), and what the best way of
tracking down the source of the problem might be?

Cheers
JP

----------------------------------------------------------------------
Ran 63 tests in 3.269s

OK
python: Modules/gcmodule.c:275: visit_decref: Assertion `gc->gc.gc_refs
!= 0' failed.
process killed by signal 6
program finished with exit code -1



From hayes.tyler at gmail.com  Sun Jan 21 23:38:43 2007
From: hayes.tyler at gmail.com (Tyler)
Date: 21 Jan 2007 20:38:43 -0800
Subject: Reading Fortran Data
In-Reply-To: <1169437907.263295.64840@q2g2000cwa.googlegroups.com>
References: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
	<1169424273.929396.133880@m58g2000cwm.googlegroups.com>
	<1169429808.910298.10240@11g2000cwr.googlegroups.com>
	<1169433752.130978.133210@a75g2000cwd.googlegroups.com>
	<1169436377.634274.172460@s34g2000cwa.googlegroups.com>
	<1169437907.263295.64840@q2g2000cwa.googlegroups.com>
Message-ID: <1169440723.665786.230210@m58g2000cwm.googlegroups.com>

Wow! Thanks for the help everyone.

I will look into each of your comments in more detail in the morning,
but I'll mention a few things I guess. The first is, the list-directed
output was not necesarily my choice as some of the code is also used by
my supervisor (and her colleagues) and I had to keep the IO similar.
However, for "non-legacy" codes (even though is was upgraded to
Fortran90), I can ensure you that I will employ a more portable format.

Also, I am very interested in the Scientific.IO module mentioned and
will look into it further along with f2py.

Once again, I thank all of you for your replies, I think I even learnt
a few things about Fortran here too....

Cheers,

t.



From gibo at gentlemail.com  Tue Jan 23 18:07:08 2007
From: gibo at gentlemail.com (GiBo)
Date: Wed, 24 Jan 2007 12:07:08 +1300
Subject: How to instantiate a different class in a constructor?
In-Reply-To: <1169563525.644251.118250@v45g2000cwv.googlegroups.com>
References: <mailman.3024.1169551181.32031.python-list@python.org>
	<1169563525.644251.118250@v45g2000cwv.googlegroups.com>
Message-ID: <45B6951C.4030100@gentlemail.com>

Paul McGuire wrote:
> On Jan 23, 5:09 am, GiBo <g... at gentlemail.com> wrote:
>> Hi all,
>>
>> I have a class URI and a bunch of derived sub-classes for example
>> HttpURI, FtpURI, HttpsURI, etc. (this is an example, I know there is
>> module urllib & friends, however my actual problem however maps very
>> well to this example).
>>
>> Now I want to pass a string to constructor of URI() and get an instance
>> of one of the subclasses back. For example uri=URI('http://abcd/...')
>> will make 'uri' an instance of HttpURI class, not instance of URI.
>>
>> To achieve this I have a list of all subclasses of URI and try to
>> instantiate one by one in URI.__new__(). In the case I pass e.g. FTP URI
>> to HttpURI constructor it raises ValueError exception and I want to test
>> HttpsURI, FtpURI, etc.
>>
>> For now I have this code:
>>
>> =====
>> class URI(object):
>>         def __new__(self, arg):
>>                 for subclass in subclasses:
>>                         try:
>>                                 instance = object.__new__(subclass, arg)
>>                                 return instance
>>                         except ValueError, e:
>>                                 print "Ignoring: %s" % e
>>                 raise ValueError("URI format not recognized" % arg)
>>
> 
> <snip>
> 
> Call __new__ and subclass.__init__ explicitly:

Thanks! That's it :-)

BTW When is the subclass.__init__() method invoked if I don't explicitly
call it from __new__()? Apparently not from baseclass.__new__() nor from
object.__new__().

GiBo


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Jan  3 14:01:26 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 03 Jan 2007 20:01:26 +0100
Subject: list/dictionary as case statement ?
References: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
	<mailman.2232.1167806595.32031.python-list@python.org>
	<71pmp2tq1klma5urhkfiv8bpq6u8sgtj06@4ax.com>
	<501r8sF1dp76aU1@mid.individual.net>
	<1167849556.429532.100990@48g2000cwx.googlegroups.com>
Message-ID: <502cs6F1d5nvlU1@mid.individual.net>

MRAB wrote:

> I think that "PC" referred to the CPU's Program Counter.

Argh, thanks. :)
 
> The x86 CPUs if typical Windows PCs aren't RISC but Intel also
> manufacture X-Scale (ARM core) processors which are.

Okay, sorry for lack of precision. I was referring to x86.
 
Regards,


Bj?rn

-- 
BOFH excuse #101:

Collapsed Backbone



From grflanagan at yahoo.co.uk  Tue Jan 23 08:46:37 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 23 Jan 2007 05:46:37 -0800
Subject: Python on AIX required files
Message-ID: <1169559996.970980.217600@l53g2000cwa.googlegroups.com>

Hello

Problem: I want to send a Python script to someone running AIX Unix but
who can't (or won't) compile or otherwise install the Python
interpreter.  If I have compiled Python on the same version of AIX,
what would I need to provide to the user to enable him to run the
script? 

Thanks

Gerard



From __peter__ at web.de  Thu Jan 11 07:46:08 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 11 Jan 2007 13:46:08 +0100
Subject: Type casting a base class to a derived one?
References: <mailman.2571.1168518354.32031.python-list@python.org>
Message-ID: <eo5bia$re6$00$1@news.t-online.com>

Frederic Rentsch wrote:

>    If I derive a class from another one because I need a few extra
> features, is there a way to promote the base class to the derived one
> without having to make copies of all attributes?
> 
> class Derived (Base):
>    def __init__ (self, base_object):
>       # ( copy all attributes )
>       ...
> 
> This looks expensive. Moreover __init__ () may not be available if it
> needs to to something else.

base_instance = Base(...)
base_instance.__class__ = Derived

Peter


From macdev at artins.org  Tue Jan  2 04:33:16 2007
From: macdev at artins.org (Ben Artin)
Date: Tue, 02 Jan 2007 04:33:16 -0500
Subject: doctesting
References: <mailman.2196.1167726381.32031.python-list@python.org>
Message-ID: <macdev-E7D970.04331502012007@reserved-multicast-range-not-delegated.example.com>

In article <mailman.2196.1167726381.32031.python-list at python.org>,
 belinda thom <bthom at cs.hmc.edu> wrote:

> I'd like to write a tester script that I can place in one place (say  
> ~/bin/python/tester.py) and then have it visible to me at the cmd- 
> line (by setting the path  variable appropriately). I have had no  
> luck in getting it to work, however.
> 
> It appears like the doctest code itself assumes that all modules to  
> be imported lie in some directory other than the one I invoked the  
> tester.py script from. In particular, simple imports in a .txt file  
> like:
> 
>    >>> import foo
> 
> fail even though I've started the script in a directory that contains  
> file foo.py

import foo looks at sys.path which is based on PYTHONPATH in the environment. 
So, one way to do what you want is to have your script modify sys.path before 
importing other modules.

hth

Ben

-- 
If this message helped you, consider buying an item
from my wish list: <http://artins.org/ben/wishlist>

I changed my name: <http://periodic-kingdom.org/People/NameChange.php>


From gagsl-py at yahoo.com.ar  Sun Jan  7 13:20:09 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 10:20:09 -0800
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <P69oh.32493$Gr2.29258@newssvr21.news.prodigy.net>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
	<mailman.2332.1168016502.32031.python-list@python.org>
	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>
	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>
	<yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>
	<mailman.2367.1168100759.32031.python-list@python.org>
	<fK_nh.25689$QU1.17301@newssvr22.news.prodigy.net>
	<w03oh.46$_k2.22@read3.inet.fi>
	<P69oh.32493$Gr2.29258@newssvr21.news.prodigy.net>
Message-ID: <1168194009.220437.286210@q40g2000cwq.googlegroups.com>

On 7 ene, 13:22, "W. Watson" <wolf_tra... at invalid.com> wrote:

> >>>https://sourceforge.net/projects/pywin32/

> As I understand it, there are two files I'm after: 1. python interpreter,
> and 2. a python editor. It's #2 that I'm having trouble downloading. The
> link is broken.

The above link should work. Follow the instructions in a previous post.
Note that in the last step, you have to choose a mirror for
downloading; that mirrow might be down or out-of-sync so you might get
an error there. Choose another mirrorr...

Note that you dont *need* PythonWin in order to use Python on Windows.
The standard Python distribution works fine. Even includes a Python
editor (IDLE) but you can use whichever editor you like to write your
code (even Notepad...)

-- 
Gabriel Genellina



From gagsl-py at yahoo.com.ar  Wed Jan 10 04:31:46 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 10 Jan 2007 06:31:46 -0300
Subject: Question about compiling.
In-Reply-To: <Pine.LNX.4.64.0701091253500.25764@saturn.syslang.net>
References: <Pine.LNX.4.64.0701091253500.25764@saturn.syslang.net>
Message-ID: <7.0.1.0.0.20070110062608.045ed6f0@yahoo.com.ar>

At Tuesday 9/1/2007 14:56, Steven W. Orr wrote:

>I *just* read the tutorial so please be gentle. I created a file called
>fib.py which works very nicely thank you. When I run it it does what it's
>supposed to do but I do not get a resulting .pyc file. The tutorial says I
>shouldn't do anything special to create it. I have machines that have both
>2.4.1 and 2.3.5. Does anyone have an idea what to do?

Welcome to Python!
When you run a script directly, no .pyc file is generated. Only when 
a module is imported (See section 6.1.2 on the tutorial). And don't 
worry about it...


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From fredrik at pythonware.com  Thu Jan 11 08:31:07 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 11 Jan 2007 14:31:07 +0100
Subject: sleep in asyncore
References: <1168512761.621361.258180@o58g2000hsb.googlegroups.com>
Message-ID: <eo5e6u$ami$1@sea.gmane.org>

"billie" <gnewsg at gmail.com> wrote:

> I'm writing an authentication server by using asyncore / asynchat
> modules.
> I'd like to implement a basic brute-force protection by "freezing /
> sleeping" the current client session for a period of time (e.g. 2
> seconds) when the user sends a wrong password.
> Does someone knows a "trick" to do that with asyncore?

this could work:

add a timeout variable to your dispatcher instance, and have your "readable"
method returns False if timeout is set and the current time is before the given
value.  then set the timeout value to time.time() + 2 when you see a bad pass-
word.

</F> 





From robert.kern at gmail.com  Mon Jan 22 15:14:59 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 22 Jan 2007 14:14:59 -0600
Subject: Program eating memory, but only on one machine? (Solved, sort of)
In-Reply-To: <loom.20070122T203730-966@post.gmane.org>
References: <mailman.2986.1169473883.32031.python-list@python.org>	<c11f84-oo5.ln1@darkstargames.dnsalias.net>	<loom.20070122T164112-825@post.gmane.org>
	<loom.20070122T203730-966@post.gmane.org>
Message-ID: <ep360f$kjc$1@sea.gmane.org>

Per B.Sederberg wrote:
> Per B.Sederberg <persed <at> princeton.edu> writes:
> 
>> I'll see if I can make a really small example program that eats up memory on
>> our cluster.  That way we'll have something easy to work with.
> 
> Now this is weird.  I figured out the bug and it turned out that every time you
> call numpy.setmember1d in the latest stable release of numpy it was using up a
> ton of memory and never releasing it.

Hmm. With a recent checkout from SVN, I don't see any memory increase.


In [15]: from numpy import *

In [16]: ar1 = arange(1000000)

In [17]: ar2 = arange(3, 7)

In [18]: import itertools

In [19]: for i in itertools.count(1):
   ....:    if not i % 1000:
   ....:        print i
   ....:    x = setmember1d(ar1, ar2)

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From nagle at animats.com  Thu Jan 18 15:50:40 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 18 Jan 2007 20:50:40 GMT
Subject: More M2Crypto issues
In-Reply-To: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>
References: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>
Message-ID: <A4Rrh.21359$yC5.8676@newssvr27.news.prodigy.net>

    Upgraded to Python 2.5 on the Linux system, rebuild M2Crypto,
and it stil fails, but the last line of the error message changed to:

ValueError: invalid literal for long() with base 10: '_40f91a08_p_SSL_CTX'

    Others have encountered this problem, from a Google search.

    Is "long" supposed to operate on C objects?

    					John Nagle

John Nagle wrote:
>   I've been running M2Crypto successfully using Python 2.4 on Windows 2000,
> and now I'm trying to get it to work on Python 2.3.4 on Linux.
> 
>   Attempting to initialize a context results in
> 
> Traceback (most recent call last):
>   File "/www/htdocs/sitetruth.com/cgi/ratingdetails.cgi", line 46, in ?
>     DetailsPageBuilder.detailspage(kdbfile,ktemplatefile,url)    # check 
> and display domain or URL as web page
>   File "./sitetruth/DetailsPageBuilder.py", line 70, in detailspage
>     sitecert = InfoSSL2.Certificate(siteinfo, kverifylocations, verbose)
>   File "./sitetruth/InfoSSL2.py", line 147, in __init__
>     self.ctx = createsslcontext(trustedcafile, verbose)    # Generate 
> general SSL context
>   File "./sitetruth/InfoSSL2.py", line 40, in createsslcontext
>     ctx = SSL.Context('sslv3')                            # Create 
> context with SSL params
>   File "/home/sitetruth/lib/python/M2Crypto/SSL/Context.py", line 43, in 
> __init__
>     map()[long(self.ctx)] = self
> ValueError: invalid literal for long(): _480e1008_p_SSL_CTX
> 
>    which, when I look at the code and try some test cases, seems
> legitimate.  The cacheing code is trying to convert a reference to an
> object (a C object, in fact) into a "long".  Python 2.4 on Windows
> will do that.  Python 2.3.4 on Linux converts it to a string first,
> gets "_480e1008_p_SSL_CTX", and then tries to convert that to an
> integer, which fails.
> 
>    M2Crypto is supposed to work with Python 2.3, so this should work.
> 
>                 John Nagle


From gagsl-py at yahoo.com.ar  Thu Jan 18 12:27:00 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 18 Jan 2007 14:27:00 -0300
Subject: How to read and write huge binary files
References: <1169136850.518228.103360@l53g2000cwa.googlegroups.com>
Message-ID: <eooal5$1mt$1@sea.gmane.org>

"Lad" <python at hope.cz> escribi? en el mensaje 
news:1169136850.518228.103360 at l53g2000cwa.googlegroups.com...

> What is a good  way to read binary data from HUGE  file and write  it
> to another file?
Without processing the data read? shutil.copy2 or similar
Else, a lot of applications can follow the pattern read-process-write: read 
a logical block, process, write the output; where "logical block" depends on 
the application: a record, a frame, a chunk...

-- 
Gabriel Genellina 




From Thomas.Ploch at gmx.net  Tue Jan  9 10:02:51 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Tue, 09 Jan 2007 16:02:51 +0100
Subject: How to write temporary data to file?
In-Reply-To: <45A3AD3E.1090500@gmx.net>
References: <45A31767.9030404@gmx.net> <45A362EF.1080006@designaproduct.biz>
	<45A3AD3E.1090500@gmx.net>
Message-ID: <45A3AE9B.4040002@gmx.net>

Thomas Ploch schrieb:
> Laszlo Nagy schrieb:
>> Thomas Ploch ?rta:
>>> Hi folks,
>>>
>>> I have a data structure that looks like this:
>>>
>>> d = {
>>>     'url1': {
>>>         'emails': ['a', 'b', 'c',...],
>>>         'matches': ['d', 'e', 'f',...]
>>>     },
>>>     'url2': {...
>>> }
>>>
>>> This dictionary will get _very_ big, so I want to write it somehow to a
>>> file after it has grown to a certain size.
>>>
>>> How would I achieve that?
>>>   
>> How about dbm/gdbm? Since urls are strings, you can store this dict in a
>> database instance and actually use it from your program as it were a dict?
>>
>>   Laszlo
>>
> 
> Well, but how do I save the nested dict values? I don't want to eval
> them, so this is no option for me.
> 
> Thomas

I just saw shelve is the module to go for.

Thomas


From bdesth.quelquechose at free.quelquepart.fr  Sun Jan  7 16:06:24 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 07 Jan 2007 22:06:24 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <45a14b57$0$4248$4fafbaef@reader1.news.tin.it>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
	<7xd55rzke9.fsf@ruckus.brouhaha.com>
	<45a0b4e3$0$19089$4fafbaef@reader4.news.tin.it>
	<45a12cb0$0$300$426a74cc@news.free.fr>
	<45a14b57$0$4248$4fafbaef@reader1.news.tin.it>
Message-ID: <45a15a94$0$8403$426a74cc@news.free.fr>

Andrea Griffini a ?crit :
> Bruno Desthuilliers wrote:
> 
>  >> ... and on
> 
>>> the opposite I didn't expect that fighting with object
>>> leaking in complex python applications was that difficult
>>> (I've heard of zope applications that just gave up and
>>> resorted to the "reboot every now and then" solution).
>>>
>> Zope is a special case here, since it relies on an object database...
> 
> 
> Just to clarify my post... I found by being punched myself
> in the nose what does it mean to have a complex python
> application that suffers from object leaking; it's not
> something I only read about zope programs.
> 
> But why zope applications would be a special case ?

1/ because of how Zope and the ZODB work
2/ because Zope is an unusually complex Python application.

FWIW, I've never had any memory problem with other Python applications 
and/or frameworks I've used so far (ie: in the past seven years) - most 
of them being somewhat 'simpler' than if they had been implemented in C 
or C++...


From gagsl-py at yahoo.com.ar  Thu Jan 18 23:48:52 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 01:48:52 -0300
Subject: How to pass arguments to the function embedded in the
	timeit.Timer()
In-Reply-To: <eop3h3$a325$1@netnews.upenn.edu>
References: <eop3h3$a325$1@netnews.upenn.edu>
Message-ID: <7.0.1.0.0.20070119013727.04059408@yahoo.com.ar>

At Thursday 18/1/2007 21:31, Dongsheng Ruan wrote:

>       Does anybody know how to pass multiple arguments to the function
>tested in timeit.timer() in
>python?
>
>I googled and found how to pass one argument:
>
>x=10000
>mytime = timeit.Timer( setup="from Createlst import createlst", stmt=
>"createlst(%s)"%(x) )

This is the % operator for strings, and it's general, not related to 
the timeit module.
You can find it explained in almost every tutorial. The "official" 
tutorial explains it here:
<http://docs.python.org/tut/node9.html#formatting> and for more 
detailed usage see here:
<http://docs.python.org/lib/typesseq-strings.html>

If you haven't already done it, I strongly recommend reading the 
Python tutorial (you should find it inside your Python installation, 
and you can read it online at <http://docs.python.org/tut/> )


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From arkanes at gmail.com  Thu Jan 11 17:01:25 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 11 Jan 2007 16:01:25 -0600
Subject: Python nuube needs Unicode help
In-Reply-To: <1168550894.155528.295700@p59g2000hsd.googlegroups.com>
References: <1168550894.155528.295700@p59g2000hsd.googlegroups.com>
Message-ID: <4866bea60701111401y71810929l88650891fc166375@mail.gmail.com>

On 11 Jan 2007 13:28:14 -0800, gheissenberger at gmail.com
<gheissenberger at gmail.com> wrote:
> HELP!
> Guy who was here before me wrote a script to parse files in Python.
>
> Includes line:
> print u
> where u is a line from a file we are parsing.
> However, we have started recieving data from Brazil. If I open file to
> parse in VI, looks like:
>
> <Utt id="3" transcribe="yes" audioRoot="A1"
> audio="313-20070102144528.wav" grammarSet="G3" rawText="n&#227;o"
> recValue="{data:CHOICE=NO;}" conf="970" rawText2="" conf2="0"
> transcribedText="n&#227;o" parsableText="n&#227;o"/
>
> Clearly those "n&#227" are some non-Ascii characters, but how do I get
> print to understand that?
>
> I keep getting:
> "UnicodeEncodeError: 'ascii' codec can't encode character u'\xe3' in
> position 40:
>  ordinal not in range(128)"
>

Find out what encoding the files are in and modify the script to use it.


From richie at entrian.com  Fri Jan 19 16:18:17 2007
From: richie at entrian.com (Richie Hindle)
Date: 19 Jan 2007 13:18:17 -0800
Subject: PyMeld for html templates?
References: <mailman.2858.1169084154.32031.python-list@python.org>
Message-ID: <1169241497.610167.130580@a75g2000cwd.googlegroups.com>

[Sean]
> I wonder if anyone has any thoughts on PyMeld as a template
> system for churning out general websites?

I'm doing that (but then I would be wouldn't I? 8-)
http://www.mandant.net is an example - the content of each page comes
from a file containing just the content, the layout and sidebar are
defined in a template HTML file, and the navigation is built by a
Python script.  All that is pulled together using PyMeld into a set of
HTML files and deployed to the web server (there's no need to it on the
fly for that site, but you certainly could).

> I want for a URI request to mysite.com/info
> to pull in a layout.html template which will in turn be populated by
> the info.html template. [...]  how about PyMeld, any ideas on how
> to do it or whether it will even work as I've described?

You'd do something like this:

from PyMeld import Meld

LAYOUT = """<html><head><title id='title'>The Title</title></head>
<body><div id='info'>The page information goes here.</div>
<p id='footer>Copyright Me 2007.</p></body></html>"""

INFO = """<html><head><title id='title'>The real title</title></head>
<body id='info'><p>Here is the info, which would in the real world
be read from a file.</p></body></html>"""

page = Meld(LAYOUT)
info = Meld(INFO)
page.title = info.title._content
page.info = info.info._content
print page

Is that the sort of thing you had in mind?

-- 
Richie Hindle
richie at entrian.com



From python at rcn.com  Wed Jan  3 14:30:53 2007
From: python at rcn.com (Raymond Hettinger)
Date: 3 Jan 2007 11:30:53 -0800
Subject: Sorting on multiple values, some ascending, some descending
References: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
Message-ID: <1167852652.416990.158610@k21g2000cwa.googlegroups.com>


dwelden wrote:
> I have successfully used the sort lambda construct described in
> http://mail.python.org/pipermail/python-list/2006-April/377443.html.
> However, how do I take it one step further such that some values can be
> sorted ascending and others descending? Easy enough if the sort values
> are numeric (just negate the value), but what about text?
>
> Is the only option to define an external sorting function to loop
> through the list and perform the comparisons one value at a time?

The simplest way is to take advantage of sort-stability and do
successive sorts.  For example, to sort by a primary key ascending and
a secondary key decending:

   L.sort(key=lambda r: r.secondary, reverse=True)
   L.sort(key=lambda r: r.primary)

A less general technique is to transform fields in a way that reverses
their comparison order:

  L.sort(key=lambda r: (-r.age, r.height))    # sorts descending age
and ascending height


Raymond



From ldo at geek-central.gen.new_zealand  Fri Jan  5 01:30:17 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 05 Jan 2007 19:30:17 +1300
Subject: Anyone persuaded by "merits of Lisp vs Python"?
References: <1167324666.002153.27570@a3g2000cwd.googlegroups.com>
	<1167357838.969945.15190@48g2000cwx.googlegroups.com>
	<mailman.2111.1167359698.32031.python-list@python.org>
Message-ID: <enkr73$lqa$2@lust.ihug.co.nz>

In message <mailman.2111.1167359698.32031.python-list at python.org>, Paul
Hummer wrote:

> I learned PHP for ease of web application development ...

PHP is great for easily developing _insecure_ web applications. But if you
want them not to leak like a sieve, things get a bit more complicated.


From robert.kern at gmail.com  Mon Jan  8 06:06:47 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 08 Jan 2007 05:06:47 -0600
Subject: Module to read svg
In-Reply-To: <45a1f746$0$27874$9b622d9e@news.freenet.de>
References: <1168225193.883421.185140@s80g2000cwa.googlegroups.com>
	<45a1f746$0$27874$9b622d9e@news.freenet.de>
Message-ID: <ent8kc$nav$1@sea.gmane.org>

Martin v. L?wis wrote:
> schpok at gmail.com schrieb:
>> Does anyone know if there's an actual free implementation of this?
> 
> For the dom module in it, xml.dom.minidom should work. Depending on
> your processing needs, that might be sufficient.

I don't think it quite fits what the OP is asking for. SVG defines some non-XML
structure for some of its contents. For example:

  <polyline points="100,200 100,100" />

The OP is asking for a module that would parse the "points" attribute into a list:

  [(100.0, 200.0), (100.0, 100.0)]

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From S.Mientki-nospam at mailbox.kun.nl  Tue Jan  2 17:08:31 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Tue, 02 Jan 2007 23:08:31 +0100
Subject: list/dictionary as case statement ?
Message-ID: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>


If I'm not mistaken, I read somewhere that you can use 
function-names/references in lists and/or dictionaries, but now I can't 
find it anymore.

The idea is to build a simulator for some kind of micro controller (just 
as a general practise, I expect it too be very slow ;-).

opcodes ={
   1: ('MOV', function1, ...),
   2: ('ADD', function2, ),
   3: ('MUL', class3.function3, )
   }

def function1
   # do something complex


Is this possible ?

thanks,
Stef Mientki


From jorge.vargas at gmail.com  Fri Jan  5 16:13:06 2007
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Fri, 5 Jan 2007 17:13:06 -0400
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
Message-ID: <32822fe60701051313i2a06ede0j516eb092bf6ba4e7@mail.gmail.com>

On 1/5/07, Stef Mientki <S.Mientki-nospam at mailbox.kun.nl> wrote:

if I undestand correctly this is what you want

>>> class pin3:
...     def __init__(self,name):
...             self.Name = name
...     def __str__(self):
...             return self.Name
...
>>> pin3()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: __init__() takes exactly 2 arguments (1 given)
>>> pin3('aaa')
<__main__.pin3 instance at 0xb7dc948c>
>>> print pin3('aaa')
aaa


From could.net at gmail.com  Fri Jan 26 04:54:05 2007
From: could.net at gmail.com (Frank Potter)
Date: 26 Jan 2007 01:54:05 -0800
Subject: how to remove c++ comments from a cpp file?
In-Reply-To: <mailman.3190.1169802638.32031.python-list@python.org>
References: <1169801197.941449.303000@v33g2000cwv.googlegroups.com>
	<mailman.3190.1169802638.32031.python-list@python.org>
Message-ID: <1169805244.879280.235660@v45g2000cwv.googlegroups.com>


On Jan 26, 5:08 pm, Gary Herron <gher... at islandtraining.com> wrote:
> Frank Potter wrote:
> > I only want to remove the comments which begin with "//".
> > I did like this, but it doesn't work.
>
> > r=re.compile(ur"//[^\r\n]+$", re.UNICODE|re.VERBOSE)
> > f=file.open("mycpp.cpp","r")
> > f=unicode(f,"utf8")
> > r.sub(ur"",f)
>
> > Will somebody show me the right way?
> > Thanks~~If you expect help with a problem, it would be nice if you told us what
> the problem is. What error did you get?
>
> But even without that I see lots of errors:
>
> You must import re before you use it:
> import re
>
> Open a file with open((..) not file.open(...).
>
> Once you open the file you must *read* the contents and operate on that:
> data = f.read()
>
> Then you ought to close the file:
> f.close()
>
> Now you can do your sub on the string in data -- but note, THIS WON'T
> CHANGE data, but rather returns a new string which you must assign to
> something:
>
> new_data = r.sub(ur"", data)
>
> Then do something with the new string.
>
> Also I fear your regular expression is incorrect.
>
> Cheers,
> Gary Herron

Thank you.
I'm very sorry because I was in a hurry when I post this thread.
I'll post again my code here:
[CODE]
import re

f=open("show_btchina.user.js","r").read()
f=unicode(f,"utf8")

r=re.compile(ur"//[^\r\n]+$", re.UNICODE|re.VERBOSE)
f_new=r.sub(ur"",f)

open("modified.js","w").write(f_new.encode("utf8"))
[/CODE]

And, the problem is, it seems that only the last comment is removed.
How can I remove all of the comments, please?



From noway at ask.me  Sat Jan 20 07:57:27 2007
From: noway at ask.me (Giovanni Bajo)
Date: Sat, 20 Jan 2007 13:57:27 +0100
Subject: PQueue and Python 2.5
In-Reply-To: <45B1EF03.9020406@v.loewis.de>
References: <1169216890.617239.209170@51g2000cwl.googlegroups.com>
	<45B1EF03.9020406@v.loewis.de>
Message-ID: <Wkosh.13684$bH4.13038@tornado.fastwebnet.it>

On 20/01/2007 11.29, Martin v. L?wis wrote:

>> I haven't got a clue how to investigate this, but I would be willing to
>> help if someone has any ideas.
> 
> There are a number of problems in this code; the most significant one is
> the incorrect usage of memory management API. In pqueue_dealloc, the
> call PyMem_DEL(pqp) should read PyObject_DEL(pqp), as the object was
> allocated with PyObject_NEW. Because this was a common error once,
> Python up to 2.4 detected that error and silently corrected it (at some
> runtime cost); Python 2.5 now has removed this work-around.

And by the way, this is also a FAQ:

http://effbot.org/pyfaq/why-does-my-c-extension-suddenly-crash-under-2.5.htm

and even explained in the Misc/NEWS of Python 2.5.
-- 
Giovanni Bajo


From rasmussen.bryan at gmail.com  Thu Jan  4 02:39:09 2007
From: rasmussen.bryan at gmail.com (bryan rasmussen)
Date: Thu, 4 Jan 2007 08:39:09 +0100
Subject: MI5 Persecution: Counter-surveillance sweep by Nationwide
	Investigations Group
In-Reply-To: <m07000407254423@4ax.com>
References: <m07000407254423@4ax.com>
Message-ID: <3bb44c6e0701032339o5752ff9ewadd4e8070277bd19@mail.gmail.com>

>As I said above, I don't know very much
> about these things, so I can't comment on the capabilities or otherwise of this equipment. >But clearly the "watchers" are using
> technology which in 1994 was beyond the detection capabilities of a good private detective >agency.
>

Lisp did that 20 years ago.

Cheers,
Bryan Rasmussen


From hg at nospam.org  Tue Jan 16 10:47:50 2007
From: hg at nospam.org (hg)
Date: Tue, 16 Jan 2007 16:47:50 +0100
Subject: Queue and signals
References: <tmbrh.1492$lc5.386@newsfe20.lga>
Message-ID: <mCcrh.1493$lc5.465@newsfe20.lga>

hg wrote:

> Hi,
> 
> Is it legal to use Queue.put in a signal handle and Queue.get in the main
> process (no thread)
> 
> Thanks,
> 
> hg


PS: and if not is there a way to share data between a "main" and its signal
in a safe way (write in signal and read in main)

Thanks,

hg



From klaus at seistrup.dk  Sat Jan  6 14:18:15 2007
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Sat, 6 Jan 2007 19:18:15 +0000 (UTC)
Subject: nntplib downloads content with extra linebreaks
References: <1168110213.436860@sj-nntpcache-1.cisco.com>
Message-ID: <enosln$hn6$1@minji.szn.dk>

Rweth wrote:

> I am using nntplib to download archived xml messages from our 
> internal newsgroup. This is working fine except the download 
> of files  to the connected server, has extra embedded lines in 
> them (all over the place), from the
>    s.body(id,afile)  # body method

The 'linebreaks' are probably '\r\n' pairs, so you could do a

	buf.replace('\r\n', '\n')

to convert all such pairs to single LFs (buf being the buffer or 
string that holds the text with 'linebreaks').

Cheers,

-- 
Klaus Alexander Seistrup
http://klaus.seistrup.dk/



From ldo at geek-central.gen.new_zealand  Fri Jan  5 01:28:21 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 05 Jan 2007 19:28:21 +1300
Subject: Anyone persuaded by "merits of Lisp vs Python"?
References: <1167324666.002153.27570@a3g2000cwd.googlegroups.com>
	<1167459454.002991.64260@48g2000cwx.googlegroups.com>
Message-ID: <enkr3f$lqa$1@lust.ihug.co.nz>

In message <1167459454.002991.64260 at 48g2000cwx.googlegroups.com>,
xscottg at gmail.com wrote:

> [3] I thought it was particularly cool how Tcl could bolt on a class
> based object oriented system as a library.  The word "class" isn't
> built into the language, but that kind of evaluator lets you add it.

I have written about two notrivial scripts in Tcl. I don't think I will ever
bother to write another, particularly since I now know Python. Dealing with
arrays is an absolute pain, because the language doesn't have references
and arrays as first-class objects.


From rmcore at gmail.com  Tue Jan 23 17:20:52 2007
From: rmcore at gmail.com (Michael Bentley)
Date: Tue, 23 Jan 2007 16:20:52 -0600
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <ep60jp$63v$1@aioe.org>
References: <ep60jp$63v$1@aioe.org>
Message-ID: <D8F7BDF1-6B6C-41CA-B49D-F433C5F324B3@gmail.com>

On Jan 23, 2007, at 4:01 PM, Daniel Jonsson wrote:

> So, I've reached the point where my building pipeline tools actually
> needs to be used by other people in my company. By this reason I
> actually need to think about the usability, and I've come to the
> conclusion that I need a GUI. So, which of the two packages should I
> learn, and which one is easier to pick up?
> Thanks in advance!
>
> Daniel

Don't forget PyGTK (http://www.pygtk.org), and Tkinter!

You should really try them all out and make your own decision, IMHO.   
I'm actually using pyobjc for my work, but if I had to support other  
environments, I'd be using PyGTK.  (Although I *was* happy with PyQt 
(3) when I was using it). 
  


From Thomas.Ploch at gmx.net  Mon Jan  8 23:17:43 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Tue, 09 Jan 2007 05:17:43 +0100
Subject: How to write temporary data to file?
Message-ID: <45A31767.9030404@gmx.net>

Hi folks,

I have a data structure that looks like this:

d = {
	'url1': {
		'emails': ['a', 'b', 'c',...],
		'matches': ['d', 'e', 'f',...]
	},
	'url2': {...
}

This dictionary will get _very_ big, so I want to write it somehow to a
file after it has grown to a certain size.

How would I achieve that?

Thanks,
Thomas


From horpner at yahoo.com  Tue Jan 16 09:40:55 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 16 Jan 2007 15:40:55 +0100
Subject: Regular expressions question
References: <1168947810.175793.228620@51g2000cwl.googlegroups.com>
	<Xns98BA7A00DDBC0duncanbooth@127.0.0.1>
	<1168957361.204348.30080@s34g2000cwa.googlegroups.com>
Message-ID: <slrneqpp4e.r8.horpner@FIAD06.norwich.edu>

On 2007-01-16, Victor Polukcht <vpolukcht at gmail.com> wrote:
> Actually, i'm trying to get the values of first field (Global) , fourth
> (200, 4), and fifth (100%) and sixth (100%).
>
> Everything except fourth is simple.

>>> g = "Global             etsi3  *   4 ok     30 100% 100% Outgoing"
>>> import re
>>> r = re.search('\*\s+(\d+)', g)
>>> r.group()
'*   4'
>>> r.group(1)
'4'

-- 
Neil Cerutti
We're not afraid of challenges. It's like we always say: If you want to go out
in the rain, be prepared to get burned. --Brazillian soccer player


From hancock at anansispaceworks.com  Fri Jan 26 12:23:19 2007
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 26 Jan 2007 11:23:19 -0600
Subject: Thoughts on using isinstance
In-Reply-To: <45b7b7ba$0$391$426a74cc@news.free.fr>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>	<mailman.3077.1169645738.32031.python-list@python.org>	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>	<mailman.3087.1169652310.32031.python-list@python.org>	<1169656371.689791.216360@v33g2000cwv.googlegroups.com>
	<45b7b7ba$0$391$426a74cc@news.free.fr>
Message-ID: <45BA3907.1000306@anansispaceworks.com>

Bruno Desthuilliers wrote:
> abcd a ?crit :
> 
>>Well my example function was simply taking a string and printing, but
>>most of my cases would be expecting a list, dictionary or some other
>>custom object.  Still propose not to validate the type of data being
>>passed in?
> 
> 
> Yes - unless you have a *very* compelling reason to do otherwise.

Some compelling reasons:

1) Some action of the function is irreversible (for example, deletion of
data)

2) The function will get many wrong parameters in normal use, and the
function's action is expensive (disk accesses, re-writing flash memory,
fetching things from remote servers, whatever)

3) The inputs are from a web form or other insecure source, and you
want to reduce the number of unexpected cases you have to deal with.
(proof against error is not the same as proof against deliberate malice)

4) The function DOESN'T fail with a certain wrong parameter, but instead
does something it shouldn't. Catch the failing case and deal with it, or
if there are many, insist on the successful case.

Even when you do have to validate, it usually promotes flexibility of
the code to check for functionality (e.g. presence of necessary methods)
rather than specific inheritence.

Using "isinstance" is one of those practices that can really help in
quick testbed code or in a prototype, but you usually want to take it
out later.

Cheers,
Terry


-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From toby at tobiah.org  Mon Jan 22 20:52:32 2007
From: toby at tobiah.org (Tobiah)
Date: Mon, 22 Jan 2007 17:52:32 -0800
Subject: AES and Credit card number encryption
In-Reply-To: <7xy7nu4ubj.fsf@ruckus.brouhaha.com>
References: <45b5159e$0$24377$88260bb3@free.teranews.com>
	<7xy7nu4ubj.fsf@ruckus.brouhaha.com>
Message-ID: <45b55d8b$0$24450$88260bb3@free.teranews.com>

Paul Rubin wrote:
> Tobiah <toby at tobiah.org> writes:
>> I browsed this subject and thought I might use the 'AES' cypher
>> scheme to do this.  Would this be a good choice?
> 
> There's more to it than that, but yes, AES is a good underlying
> algorithm.

Looking at the problem further, I am getting the idea that
PGP, or GPG (Asymetric encryption) would be better, because
then all of the software that has to *write* CC numbers, would
not have to access the 'secret' key.  You see we have to write
the number often, but almost always only have to access (read)
a masked number (4232********3435).

PGP sounds great, but it seems like a huge subject to cover
in a day or two.  Is there a nice module for python that would
let me do the most usual operations easily?  I just want to make
a key, hide it, and the use the public key to encrypt all future
and past credit card numbers.

-- 
Posted via a free Usenet account from http://www.teranews.com



From enleverlesX.XmcX at XmclaveauX.com  Wed Jan 17 09:29:25 2007
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Wed, 17 Jan 2007 15:29:25 +0100
Subject: generate tuples from sequence
References: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>
Message-ID: <45ae32d0$0$27387$ba4acef3@news.orange.fr>

Hi!

    r=iter(range(9))
    print zip(r,r,r)

But, it's few like Peter...
-- 
Michel Claveau




From wccppp at gmail.com  Thu Jan  4 12:27:09 2007
From: wccppp at gmail.com (wcc)
Date: 4 Jan 2007 09:27:09 -0800
Subject: question on creating class
In-Reply-To: <1167895677.041759.230190@42g2000cwt.googlegroups.com>
References: <1167895677.041759.230190@42g2000cwt.googlegroups.com>
Message-ID: <1167931629.303805.158810@s34g2000cwa.googlegroups.com>

Thanks for all replies. I'll just to have to figure our which suggested
method I should use.  To answer Jussi's question, this is why I asked
the question.  I have the book by Mark:  Python Programming on Win32.
In Charpter 12: Advanced Python and COM there is a sample code named:
DynamicPolicy.py.  It can be used to expose all methods from a python
module to a COM server which can be accessed later from other
languages, say VBA. It works great.  There are quite a few modules that
I want to implement a COM server for.  One of the step to create the
COM server is to define a class.  Instead of revising this code for
each module, I wondered if I can create mutilple COM servers in one
program.  I'll pass a module name and the corresponding class name to
some function (to be written), and the class will be created.  Btw, I'm
novice to all this, hopefully my explanation isn't way off.  Thank to
all again. 

--
wcc



From cibonac at gmail.com  Thu Jan 11 09:17:30 2007
From: cibonac at gmail.com (new)
Date: 11 Jan 2007 06:17:30 -0800
Subject: What about this?
Message-ID: <1168525050.536736.74590@i39g2000hsf.googlegroups.com>

www.magicoz.com
amazing



From gagsl-py at yahoo.com.ar  Wed Jan 10 23:27:38 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 01:27:38 -0300
Subject: Universal Feed Parser - How do I keep attributes?
In-Reply-To: <1168450723.340213.235690@o58g2000hsb.googlegroups.com>
References: <1168450723.340213.235690@o58g2000hsb.googlegroups.com>
Message-ID: <7.0.1.0.0.20070111012646.03f5bdb8@yahoo.com.ar>

At Wednesday 10/1/2007 14:38, snewman18 at gmail.com wrote:

> >>> d = feedparser.parse('http://weather.yahooapis.com/forecastrss?p=94089')
> >>> d.feed.yweather_location
>u''

You have to feed it the *contents* of the page, not its URL.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From codecraig at gmail.com  Wed Jan 24 07:38:30 2007
From: codecraig at gmail.com (abcd)
Date: 24 Jan 2007 04:38:30 -0800
Subject: Thoughts on using isinstance
Message-ID: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>

In my code I am debating whether or not to validate the types of data
being passed to my functions.  For example

def sayHello(self, name):
    if not name:
        rasie "name can't be null"
    if not isinstance(name, str):
        raise "name must be a string"
    print "Hello " + name

Is the use of isinstance a "bad" way of doing things?  is it a "heavy"
operation?  for example, if I use this in each function validate input
will it slow things down a lot?

just curious how you might handle this type of situation (other than
not validating at all).

thanks



From grante at visi.com  Fri Jan  5 10:48:14 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 05 Jan 2007 15:48:14 -0000
Subject: program deployment
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<12psqqk75ij5ta5@corp.supernews.com>
	<1168011416.291950.286500@s80g2000cwa.googlegroups.com>
Message-ID: <12psspukvim83bb@corp.supernews.com>

On 2007-01-05, king kikapu <aboudouvas at panafonet.gr> wrote:
>> Under Windows, I ususally use py2exe+inno-setup.
>
> Xmmm...i have downloaded this and try a (very) simple project
> and it is working great. Of your experience, does it also
> working great when you have more complex solutions,
> e.x. many 3rd party modules like wxWidgets and so ??

Yes.  I use it to deply wxPython apps that use a lot of third
party packages like pyserial, numpy, scipy, scientific python,
pygnuplot, plotlib.

The resulting setup.exe files seem awfully large to somebody
who cut his teeth on Unix Version 7 on a PDP-11 with 256KB of
RAM and a 20MB hard drive (and who still writes programs for
platforms with 256 bytes of RAM).

But, by windows standards they're not all that large.  Nobody
cares anymore that a program won't fit on a floppy disk...

-- 
Grant Edwards                   grante             Yow!  I think my CAREER
                                  at               is RUINED!!
                               visi.com            


From roopesh.raj at gmail.com  Wed Jan 17 09:13:22 2007
From: roopesh.raj at gmail.com (Roopesh)
Date: 17 Jan 2007 06:13:22 -0800
Subject: IMAP SEARCH Error
Message-ID: <1169043202.521317.226910@q2g2000cwa.googlegroups.com>

I am using the imaplib to fetch mails. There is an error thrown in the
search function, which I am not able to comprehend.

My program is as follows :
====================
import imaplib

M = imaplib.IMAP4("10.1.1.1",1143)
M.login("roopesh", "roopesh12")
type, data = M.select("INBOX", 1)

print type, data
print M.status("INBOX", '(MESSAGES UNSEEN RECENT)')

typ, data = M.search(None, '(ALL)')

print typ, data
for num in data[0].split():
    typ, data = M.fetch(num, '(RFC822)')
    print 'Message %s\n%s\n' % (num, data[0][1])
M.close()
M.logout()

And the OUTPUT in the console is as follows :
==================================

OK ['24']
('OK', ['INBOX ( MESSAGES 24 UNSEEN 0 RECENT 0)'])
Traceback (most recent call last):
  File "imap_test1.py", line 10, in ?
    typ, data = M.search(None, '(ALL)')
  File "c:\python24\lib\imaplib.py", line 602, in search
    typ, dat = self._simple_command(name, *criteria)
  File "c:\python24\lib\imaplib.py", line 1028, in _simple_command
    return self._command_complete(name, self._command(name, *args))
  File "c:\python24\lib\imaplib.py", line 860, in _command_complete
    raise self.abort('command: %s => %s' % (name, val))
imaplib.abort: command: SEARCH => unexpected response: '*'

Can anyone tell me why this happens ?

Regards
Roopesh



From libintr at gmail.com  Sat Jan 13 21:49:16 2007
From: libintr at gmail.com (lee)
Date: 13 Jan 2007 18:49:16 -0800
Subject: indentation in python
Message-ID: <1168742956.828457.287610@m58g2000cwm.googlegroups.com>

Can anyone tell me the basics about indentation in python......how we
use it in loops and constructs..etc....



From jura.grozni at gmail.com  Mon Jan 29 16:50:03 2007
From: jura.grozni at gmail.com (azrael)
Date: 29 Jan 2007 13:50:03 -0800
Subject: Data structure and algorithms
In-Reply-To: <1170095416.261460.157660@a34g2000cwb.googlegroups.com>
References: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
	<1170095416.261460.157660@a34g2000cwb.googlegroups.com>
Message-ID: <1170107403.836795.211280@k78g2000cwa.googlegroups.com>

thanks guys. i see that there is no way then to go back to C to 
satisfy my prof and get a grade



From steve at REMOVE.THIS.cybersource.com.au  Sat Jan  6 02:57:44 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 06 Jan 2007 18:57:44 +1100
Subject: program deployment
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
	<12psqtppgi5cme6@corp.supernews.com>
	<1168010377.179056.220500@s80g2000cwa.googlegroups.com>
	<1168012877.398078.59120@s80g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.06.07.57.44.320020@REMOVE.THIS.cybersource.com.au>

On Fri, 05 Jan 2007 08:01:17 -0800, Michele Simionato wrote:

> king kikapu wrote:
>> > > Are they embarassed by their code?
>>
>> hehehe...no, just worried about stealing their ideas...
> 
> I believe that shipping just the bytecode is a pretty effective way to
> stop 99% of programmers from
> reading your code. Yes, in theory they could decompile it, but in
> practice, programmers are lazy.

99% of programmers won't read the code if you ship the source.

> Look, I am so lazy that usually I don't read the source code, even if
> it is there in plain!

Exactly.



-- 
Steven.



From stever at cruzio.com  Thu Jan 25 20:13:25 2007
From: stever at cruzio.com (Steve)
Date: 25 Jan 2007 17:13:25 -0800
Subject: Pyparsing - Dealing with a Blank Value
Message-ID: <1169774005.890880.259830@j27g2000cwj.googlegroups.com>

Hi All,

I've picked up the PyParsing module and am trying to figure out how to
do a simple parsing of some HTML source code.  My specific problem is
dealing with an <TD></TD> element that is blank.



from pyparsing import *
import sys


integer = Word("0123456789")

trStart = Literal("<TR>").suppress()
trEnd = Literal("</TR>").suppress()

tdStart = Literal("<TD>").suppress()
tdEnd = Literal("</TD>").suppress()

#dataItem = Word(alphas)
BlankItem = Word('')
dataItem = Word(alphanums + " " + "," + ":") # works with spaces in
data
MultiItem = Optional(OneOrMore(dataItem))

TestLine = ['<TR><TD>Group</TD><TD>Year</TD><TD>City</TD></TR>',
           '<TR><TD>AAA</TD><TD>1992</TD><TD>Los Angeles</TD></TR>',
           '<TR><TD>BBB</TD><TD>2007</TD><TD>Santa Cruz</TD></TR>',
           '<TR><TD></TD><TD>2001</TD><TD>Santa Cruz</TD></TR>']

htmlLine = trStart + tdStart + MultiItem.setResultsName('status') +
tdEnd + tdStart + MultiItem.setResultsName('year') + tdEnd + tdStart +
MultiItem.setResultsName('title') + tdEnd + trEnd


for CurrentLine in TestLine:
  print 'Line = ', CurrentLine

  for srvrtokens,startloc,endloc in htmlLine.scanString( CurrentLine ):
      print 'tokens = %s  %d  %d \n' % (srvrtokens, startloc,endloc)


Output :

Line =  <TR><TD>Group</TD><TD>Year</TD><TD>City</TD></TR>
tokens = ['Group', 'Year', 'City']  0  49

Line =  <TR><TD>AAA</TD><TD>1992</TD><TD>Los Angeles</TD></TR>
tokens = ['AAA', '1992', 'Los Angeles']  0  54

Line =  <TR><TD>BBB</TD><TD>2007</TD><TD>Santa Cruz</TD></TR>
tokens = ['BBB', '2007', 'Santa Cruz']  0  53


*** Blank 1st element - only shows 2 elements  - need 3 elements to be
consistent ***

Line =  <TR><TD></TD><TD>2001</TD><TD>Santa Cruz</TD></TR>
tokens = ['2001', 'Santa Cruz']  0  50


Any assistance would be greatly appreciated!

Steve



From alexisbrion at gmail.com  Fri Jan  5 09:55:52 2007
From: alexisbrion at gmail.com (alex)
Date: 5 Jan 2007 06:55:52 -0800
Subject: How to get file name on a remote server with ftplib?
Message-ID: <1168008952.020516.130890@s80g2000cwa.googlegroups.com>

Hello,

My script is trying to get a file from a remote server, every day it
ftps from a directory. My code works perfect if I know the name of the
file in the remote directory.

ftp.retrbinary('RETR ' + filename, handleDownload)

The problem is that in the future the name of the file is going to be
aleatory. How can I get the file's name (only one file is in that
directory) and store it in a variable before executing ftp.retrbinary?

Thanks a lot for your help,

Alex



From martin at v.loewis.de  Sat Jan  6 03:30:12 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 06 Jan 2007 09:30:12 +0100
Subject: Newbie XML SAX Parsing: How do I ignore an invalid token?
In-Reply-To: <1168054226.290465.325910@s34g2000cwa.googlegroups.com>
References: <1168033818.692201.183790@11g2000cwr.googlegroups.com>
	<mailman.2354.1168037149.32031.python-list@python.org>
	<1168054226.290465.325910@s34g2000cwa.googlegroups.com>
Message-ID: <459f5e14$0$17107$9b622d9e@news.freenet.de>

scott at crybabymaternity.com schrieb:
> My original posting has a funky line break character (it appears as an
> ascii square) that blows up my program, but it may or may not show up
> when you view my message.

Looking at your document, it seems that this "funky line break
character" is character \x1E, which, in latin-1, means "record
separator". It's indeed ill-formed to use it in XML.

> Is there a way to account for the invalid token in the error handler?

Not with a standard XML parser, no. The error you describe is a "fatal
error", and that's not something parsing can recover from. I recommend
that you filter this character out before passing it to the XML parser.
You can use the IncrementalParser interface to do so.

Regards,
Martin


From could.net at gmail.com  Sat Jan 27 06:18:47 2007
From: could.net at gmail.com (Frank Potter)
Date: 27 Jan 2007 03:18:47 -0800
Subject: extracting from web pages but got disordered words sometimes
Message-ID: <1169896727.567159.239160@a34g2000cwb.googlegroups.com>

There are ten web pages I want to deal with.
from http://www.af.shejis.com/new_lw/html/125926.shtml
to      http://www.af.shejis.com/new_lw/html/125936.shtml

Each of them uses the charset of Chinese "gb2312", and firefox 
displays all of them in the right form, that's readable Chinese.

My job is, I get every page and extract the html title of it and 
dispaly the title on linux shell Termial.

And, my problem is, to some page, I get human readable title(that's in 
Chinese), but to other pages, I got disordered word. Since each page 
has the same charset, I don't know why I can't get every title in the 
same way.

Here's my python code, get_title.py :

[CODE]
#!/usr/bin/python
import urllib2
from BeautifulSoup import BeautifulSoup

min_page=125926
max_page=125936

def make_page_url(page_index):
    return ur"".join([ur"http://www.af.shejis.com/new_lw/
html/",str(page_index),ur".shtml"])

def get_page_title(page_index):
    url=make_page_url(page_index)
    print "now getting: ", url
    user_agent='Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'
    headers={'User-Agent':user_agent}
    req=urllib2.Request(url,None,headers)
    response=urllib2.urlopen(req)
    #print response.info()
    page=response.read()

    #extract tile by beautiful soup
    soup=BeautifulSoup(page)
    full_title=str(soup.html.head.title.string)

    #title is in the format of "title --title"
    #use this code to delete the "--" and the duplicate title
    title=full_title[full_title.rfind('-')+1::]

    return title

for i in xrange(min_page,max_page):
    print get_page_title(i)
[/CODE]

Will somebody please help me out? Thanks in advance.



From horpner at yahoo.com  Wed Jan  3 13:27:01 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 3 Jan 2007 19:27:01 +0100
Subject: array of class / code optimization
References: <mailman.2221.1167763760.32031.python-list@python.org>
	<AOPmh.83$9v1.124@nntpserver.swip.net>
	<6UPmh.6785$hr3.92@newsfe24.lga> <4MQmh.145$jr6.14@read3.inet.fi>
Message-ID: <slrnepntff.1lk.horpner@FIAD06.norwich.edu>

On 2007-01-03, Jussi Salmela <tiedon_jano at hotmail.com> wrote:
> hg kirjoitti:
>> mm wrote:
>> 
>>> Yes, it was the (), equivalent to thiks like new() create new object
>>> from class xy.
>>>>   s1.append(Word)
>>> s1.append(Word())
>>>
>>> But I was looking for a "struct" equivalent like in c/c++.
>>> And/or "union". I can't find it.
>>>
>>> Maybe you know a source (URL) "Python for c/c++ programmers" or things
>>> like that.
>>>
>>>
>>> Yes, I konw whats an object is...
>> 
>> 
>> A struct in C is unrelated to a struct in C++ as a struct in C++ _is_ a
>> class.
>> 
>> 
>> hg
>
> What does your sentence mean, exactly? If I take a C file xyz.c
> containing a struct definition S, say, rename it to be xyz.cpp
> and feed it to a C++ compiler, the S sure remains a struct and
> the C++ compiler has no difficulty in handling it as a struct,
> so ?!?

That's true.

But it's also true that

struct foo {
  int x, y;
};

is exactly equivalent to:

class foo {
  public:
    int x, y;
};

The only difference between struct and class in C++ is the
default access specification of its members.

-- 
Neil Cerutti
For those of you who have children and don't know it, we have a nursery
downstairs. --Church Bulletin Blooper


From omniflex at mail.ru  Sat Jan 20 08:05:31 2007
From: omniflex at mail.ru (Alex)
Date: Sat, 20 Jan 2007 15:05:31 +0200
Subject: Match 2 words in a line of file
In-Reply-To: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
References: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
Message-ID: <1212885112.20070120150531@mail.ru>



egc> how do i write a regexp for this.. or better yet shd i even be using
egc> regexp or is there a better way to do this....
"A team of engineers were faced with a problem; they decided to handle
it with regular expressions. Now they had two problems"


Regular expressions are not always the best solution. Others have
pointed out how it can work with "if word in line", this approach will
do if you're dealing with simple cases.


Take a look at this discussion, it is very informative:
http://blogs.msdn.com/oldnewthing/archive/2006/05/22/603788.aspx



From joshua at eeinternet.com  Sat Jan 20 14:24:52 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Sat, 20 Jan 2007 10:24:52 -0900
Subject: how to mimik a main() function to start a program with entry
	point?
References: <mailman.2897.1169213439.32031.python-list@python.org>
Message-ID: <45b25fda$0$24352$88260bb3@free.teranews.com>

krishnakant Mane wrote:

> hello all.
> I have one simple query and may be that's to stupid to answer but I am
> not finding the answer any ways.
> I have a set of modules in my package and out if which one is my
> actual starting point to my entire program.  say for example I have an
> entire database application ready and I want a main (as in java or c)
> to initiate the program and may be bring up a login screen and then
> pass the control on to the main window.
> if I am giving raw source code that is easy because I will tell user
> to run the command ./xyz.py which has that function.
> but if I freze it into an executable with py2exe for example , how do
> I solve this problem?
> thanks.
> Krishnakant.

See http://www.artima.com/weblogs/viewpost.jsp?thread=4829
by GvR himself.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From robert.kern at gmail.com  Tue Jan  9 14:44:34 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 09 Jan 2007 13:44:34 -0600
Subject: distutils and ctypes
In-Reply-To: <eo0r0n$ok4$1@sea.gmane.org>
References: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>
	<eo0r0n$ok4$1@sea.gmane.org>
Message-ID: <eo0rb8$ok4$2@sea.gmane.org>

Robert Kern wrote:
> jtravs at gmail.com wrote:
> 
>> So finally, my question is, is there a way to get distutils to simply
>> build a shared library on windows so that I can use ctypes with them???
> 
> Not out-of-box, no. The OOF2 project has added a bdist_shlib command which
> should do most of what you want, though. It's somewhat UNIX-oriented, and I
> think it tries to install the shared library to a standard location (e.g.
> /usr/local/lib). You might want to modify it to install the shared library in
> the package so it is easy to locate at runtime.
> 
>   http://www.ctcms.nist.gov/oof/oof2/
>   http://www.ctcms.nist.gov/oof/oof2/source/oof2-2.0.1.tar.gz
> 
> The code is in the shlib/ subdirectory.

And if you do so, please let us know about it! This would be quite useful for
many other ctypes-using projects.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From gagsl-py at yahoo.com.ar  Thu Jan 25 22:10:20 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 26 Jan 2007 00:10:20 -0300
Subject: Http listener
In-Reply-To: <1169778746.893177.20730@v33g2000cwv.googlegroups.com>
References: <1169778746.893177.20730@v33g2000cwv.googlegroups.com>
Message-ID: <7.0.1.0.0.20070126000855.047c1930@yahoo.com.ar>

At Thursday 25/1/2007 23:32, elrondrules at gmail.com wrote:

>Am trying to find any resources that helps me to do write the Http
>Listener..

Use SimpleHTTPServer; see its source code for an example.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From wolfson at gmail.com  Wed Jan 24 00:24:52 2007
From: wolfson at gmail.com (Ben Wolfson)
Date: Tue, 23 Jan 2007 21:24:52 -0800
Subject: sqlite user-defined functions & unicode issue
Message-ID: <6282abf10701232124k7e0d5d80j3bda7e71bfe89d64@mail.gmail.com>

I've got a db some of whose elements have been created automatically
from filesystem data (whose encoding is iso-8859-1).  If I try to
select one of those elements using a standard SQL construct, things
work fine:

>>> sqlite.register_converter("text", unicode)
>>> db = sqlite.connect(".mdb/database", detect_types=sqlite.PARSE_COLNAMES)
>>> cursor = db.cursor()
>>> cursor.execute("SELECT * FROM artists WHERE name LIKE ?", ("John
Butcher%",)).fetchall()
[(1653, u'John Butcher & Eddie Pr\xe9vost')]
>>>

But if I use the pysqlite recipe for searching with a regexp, things don't work:
>>> db.create_function("regexp", 2, regexp)
>>> cursor.execute("SELECT * FROM artists WHERE REGEXP(?, name)",
('John Butcher',)).fetchall()

Traceback (most recent call last):
  File "<pyshell#14>", line 1, in -toplevel-
    cursor.execute("SELECT * FROM artists WHERE REGEXP(?, name)",
('John Butcher',)).fetchall()
OperationalError: user-defined function raised exception
>>>

Testing reveals that "item" is passed as None:
>>> def regexp(expr, item):
	if item is None: return False
	r = re.compile(expr, re.I)
	return r.search(item) is not None

>>> db = sqlite.connect(".mdb/database", detect_types=sqlite.PARSE_COLNAMES)
>>> db.create_function("regexp", 2, regexp)
>>> cursor.execute("SELECT * FROM artists WHERE REGEXP(?, name)",
('John Butcher',)).fetchall()
[]
>>>

How can I get around this?  I really want to be able to search by
regexp, and not just the standard SQL %-pattern.

-- 
Ben Wolfson
"However, identifying what we call 'time' or even 'space', which I
shall mention soon, is a very difficult problem, and a philosopher
would say that it is an extremely annoying subject."
(Soseki Natsume, "The Philosophical Foundations of Literature")


From tim.one at comcast.net  Wed Jan 10 22:44:54 2007
From: tim.one at comcast.net (Tim Peters)
Date: Wed, 10 Jan 2007 21:44:54 -0600
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
	<envur1$rq1$1@gemini.csx.cam.ac.uk>
	<mailman.2480.1168350033.32031.python-list@python.org>
	<Xns98B384E126F4Ctim111one@216.196.97.136>
	<eo0mjf$i4h$1@gemini.csx.cam.ac.uk>
	<Xns98B3A00749D6tim111one@216.196.97.136>
	<eo2c3l$5v2$1@gemini.csx.cam.ac.uk>
Message-ID: <Xns98B4E769834AAtim111one@216.196.97.136>

[Tim Peters]
...
>> Huh.  I don't read it that way.  If it said "numbers can be ..." I 
>> might, but reading that way seems to requires effort to overlook the 
>> "decimal" in "decimal numbers can be ...".

[Nick Maclaren]
> I wouldn't expect YOU to read it that way,

Of course I meant "putting myself in others' shoes, I don't ...".

> but I can assure you from experience that many people do.

Sure.  Possibly even most.  Short of writing a long & gentle tutorial, 
can that be improved?  Alas, most people wouldn't read that either <0.5 
wink>.

> What it MEANS is "Numbers with a short representation in decimal

"short" is a red herring here:  Python's Decimal constructor ignores the 
precision setting, retaining all the digits you give.  For example, if 
you pass a string with a million decimal digits, you'll end up with a 
very fat Decimal instance -- no info is lost.

> can be represented exactly in decimal arithmetic", which is
> tautologous.  What they READ it to mean is "One advantage of
> representing numbers in decimal is that they can be represented
> exactly", and they then assume that also applies to pi, sqrt(2),
> 1/3 ....
>
> The point is that the "decimal" could apply equally well to the
> external or internal representation and, if you aren't fairly
> clued-up in this area, it is easy to choose the wrong one.

Worse, I expect most people have no real idea of that there's a possible 
difference between internal and external representations.  This is often 
given as a selling point for decimal arithmetic:  it's WYSIWYG in ways 
binary fp can't be (short of inventing power-of-2 fp representations for 
I/O, which few people would use).

[attribution lost]
>>>>> and how is decimal no better than binary?

[Tim]
>>>> Basically, they both lose info when rounding does occur.  For
>>>> example, 

[Nick]
>>> Yes, but there are two ways in which binary is superior.  Let's
>>> skip the superior 'smoothness', as being too arcane an issue for
>>> this group,

>> With 28 decimal digits used by default, few apps would care about
>> this anyway.

> Were you in the computer arithmetic area during the "base wars" of the
> 1960s and 1970s that culminated with binary winning out?

Yes, although I came in on the tail end of that and never actually used 
a non-binary machine.

> A lot of very well-respected numerical analysts said that larger bases
> led to a faster build-up of error (independent of the precision).  My
> limited investigations indicated that there was SOME truth in that,
> but it wasn't a major matter; I never say the matter settled
> definitively.

My point was that 28 decimal digits of precision is far greater than 
supplied even by 64-bit binary floats today (let alone the smaller sizes 
in most-common use back in the 60s and 70s).  "Pollution" of low-order 
bits is far less of a real concern when there are some number of low-
order bits you don't care about at all.

>>> and deal with the other.  In binary, calculating the mid-point
>>> of two numbers (a very common operation) is guaranteed to be within
>>> the range defined by those numbers, or to over/under-flow.
>>>
>>> Neither (x+y)/2.0 nor (x/2.0+y/2.0) are necessarily within the range
>>> (x,y) in decimal, even for the most respectable values of x and y.
>>> This was a MAJOR "gotcha" in the days before binary became standard,
>>> and will clearly return with decimal.

>> I view this as being an instance of "lose info when rounding does 
>> occur".  For example,
 
> No, absolutely NOT!

Of course it is.  If there were no rounding errors, the computed result 
would be exactly right -- that's darned near tautological too.  You 
snipped the examples I gave showing exactly where and how rounding error 
created the problems in (x+y)/2 and x/2+y/2 for some specific values of 
x and y using decimal arithmetic.  If you don't like those examples, 
supply your own, and if you get a similarly surprising result you'll 
find rounding error(s) occur(s) in yours too.

It so happens that rounding errors in binary fp can't lead to the same 
counterintuitive /outcome/, essentially because x+x == y+y implies x == 
y in base 2 fp, which is indeed a bit of magic specific to base 2.  The 
fact that there /do/ exist fp x and y such that x != y yet x+x == y+y in 
bases > 2 is entirely due to fp rounding error losing info.

> This is an orthogonal matter,

Disagree.

> and is about the loss of an important invariant when using any base
> above 2.

It is that.

> Back in the days when there were multiple bases, virtually every
> programmer who wrote large numerical code got caught by it at least
> once, and many got caught several times (it has multiple guises).
> For example, take the following algorithm for binary chop:
>
> while 1 :
>     c = (a+b)/2
>     if f(x) < y :
>         if c == b :
>             break
>         b = c
>     else :
>         if c == a :
>             break
>         a = c
>
> That works in binary, but in no base above 2 (assuming that I haven't
> made a stupid error writing it down).  In THAT case, it is easy to fix
> for decimal, but there are ways that it can show up that can be quite
> tricky to fix.

If you know a < b, doing

    c = a + (b-a)/2

instead of

    c = (a+b)/2

at least guarantees (ignoring possible overflow) a <= c <= b.  As shown 
last time, it's not even always the case that (x+x)/2 == x in decimal fp 
(or in any fp base > 2, for that matter).


From steve at holdenweb.com  Thu Jan 11 17:53:23 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 11 Jan 2007 22:53:23 +0000
Subject: How much slower is dict indexing vs. list indexing?
In-Reply-To: <1168555253.601611.258600@k58g2000hse.googlegroups.com>
References: <1168555253.601611.258600@k58g2000hse.googlegroups.com>
Message-ID: <eo6f54$f8q$1@sea.gmane.org>

Emin wrote:
> Dear Experts,
> 
> How much slower is dict indexing vs. list indexing (or indexing into a
> numpy array)? I realize that looking up a value in a dict should be
> constant time, but does anyone have a sense of what the overhead will
> be in doing a dict lookup vs. indexing into a list? Some ad hoc tests
> I've done indicate that the overhead is less than 15% (i.e., dict
> lookups seem to take no more than 15% longer than indexing into a list
> and there doesn't seem to be much difference in indexing into a list
> vs. a numpy array).
> 
> The reason I ask is because I'm wondering how hard I should work to
> compute and store an index into a list to avoid repeated hash table
> lookups. From my tests, it looks like the answer is basically "don't
> bother". Does anyone have information, thoughts, or comments on this?
> 
I think "don't bother" is a good conclusion. Tim Peters has led the 
charge to (as he might put it) "optimize the snot" out of the dict 
implementation. Anything you do in Python to speed up access is likely 
to add more to execution time than you might save by not exercising the 
C-based dict lookup code.

What technique were you thinking of to look up the cached index values 
in Python, just as a matter of curiosity? Storing them in a dict? It 
would be hard to think of a faster way ... ;-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From phd at phd.pp.ru  Mon Jan 22 13:22:42 2007
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Mon, 22 Jan 2007 21:22:42 +0300
Subject: SQLObject 0.8.0b2
Message-ID: <20070122182242.GF8012@phd.pp.ru>

Hello!

I'm pleased to announce the 0.8.0b2 release of SQLObject.


What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite, and
Firebird.  It also has newly added support for Sybase, MSSQL and MaxDB (also
known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Development:
http://sqlobject.org/devel/

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.8.0b2

News and changes:
http://sqlobject.org/devel/News.html


What's New
==========

News since 0.8.0b1
------------------

* Another round of bugfixes for MySQL errors 2006 and 2013 (SERVER_GONE,
  SERVER_LOST).

* Fixed a bug in MSSQLConnection caused by column names being unicode.

* Fixed a bug in FirebirdConnection caused by column names having trailing
  spaces.

* Remove a leading slash in FirebirdConnection.

For a more complete list, please see the news:
http://sqlobject.org/devel/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From bearophileHUGS at lycos.com  Tue Jan 16 16:25:06 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 16 Jan 2007 13:25:06 -0800
Subject: A note on heapq module
In-Reply-To: <45ad0f6c$1@nntp0.pdx.net>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<45ad0f6c$1@nntp0.pdx.net>
Message-ID: <1168982702.903306.152940@m58g2000cwm.googlegroups.com>

Scott David Daniels:
> I'd suggest some changes.  It is nice to have Heaps with equal
> contents equal no matter what order the inserts have been done.
> Consider how you want Heap([1, 2, 3]) and Heap([3, 1, 2]) to behave.
> Similarly, it is nice to have str and repr produce canonical
> representations (I would skip the __str__ code, myself, though).
> Also, subclasses should get their identities tweaked as so:

My version was a *raw* one, just an idea, this is a bit better:
http://rafb.net/p/nLPPjo35.html
I like your changes. In the beginning I didn't want to put __eq__
__ne__ methods at all, because they are too much slow, but being them
O(n ln n) I think your solution is acceptable.

Some methods may have a name different from the heap functions:
def smallest(self):
def push(self, item):
def pop(self):
def replace(self, item):

Two things left I can see: I think the __init__ may have a boolean
inplace parameter to avoid copying the given list, so this class is
about as fast as the original heapify function (but maybe such thing is
too much dirty for a Python stdlib):

def __init__(self, sequence=None, inplace=False):
    if sequence is None:
        self._heap = []
    elif isinstance(sequence, self.__class__):
        self._heap = sequence._heap[:]
    else:
        if inplace and isinstance(sequence, list):
            self._heap = sequence
        else:
            self._heap = list(sequence)
        heapify(self._heap)

The second thing, I don't like much the __iter__ because it yields
unsorted items:

def __iter__(self):
    return self._heap.__iter__()

Is this good? I think this can be accepted.

Thank you,
bye,
bearophile



From mikael at isy.liu.se  Wed Jan 10 10:14:38 2007
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Wed, 10 Jan 2007 16:14:38 +0100
Subject: Yield
In-Reply-To: <45a3e096$0$8024$3b214f66@tunews.univie.ac.at>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>	<455b4f9f$1@usenet01.boi.hp.com>	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>	<455c15ca$1@news.eftel.com>	<mailman.227.1163664079.32031.python-list@python.org>	<455c1ddf@news.eftel.com>	<1163691173.737911.130410@i42g2000cwa.googlegroups.com>	<mailman.317.1163751303.32031.python-list@python.org>
	<45a3e096$0$8024$3b214f66@tunews.univie.ac.at>
Message-ID: <45A502DE.9000901@isy.liu.se>

Mathias Panzenboeck wrote:
> def primes():
> 	yield 1
> 	yield 2
> 	[snip rest of code]
>   

Hmm... 1 is not a prime. See for instance

    http://en.wikipedia.org/wiki/Prime_number

The definition given there is "In mathematics </wiki/Mathematics>, a 
*prime number* (or a *prime*) is a natural number </wiki/Natural_number> 
that has exactly two (distinct) natural number divisors 
</wiki/Divisor>." The important part of the statement is "exactly 
two...divisors", which rules out the number 1.

/MiO


From gagsl-py at yahoo.com.ar  Mon Jan  8 11:56:31 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 08 Jan 2007 13:56:31 -0300
Subject: AES256 in PyCrypto
In-Reply-To: <1168205009.554907.181120@v33g2000cwv.googlegroups.com>
References: <1168134542.337448.261510@s34g2000cwa.googlegroups.com>
	<pan.2007.01.07.10.30.53.653351@gmx.net>
	<1168184060.548851.11540@i15g2000cwa.googlegroups.com>
	<enrdah$k40$02$1@news.t-online.com>
	<1168205009.554907.181120@v33g2000cwv.googlegroups.com>
Message-ID: <7.0.1.0.0.20070108134626.03deb760@yahoo.com.ar>

At Sunday 7/1/2007 18:23, mirandacascade at yahoo.com wrote:

>Is a docstring is the text between the three consecutive quote
>characters in a .py file?  The reason for the question is that I looked

See section 4.6 in the Python Tutorial - I strongly suggest you read 
it (or any other introductory text like diveintopython)

>Can docstrings be embedded within the .pyd extension modules as well?

Yes - if the original module writer has provided it.

> >>> x = AES.new(
>As soon as I type the '(' character, the IDE displays:
>new(key, [mode], [IV]): Return a new AES encryption object [...]
>I'm guessing that what the IDE is displaying is the first line of what
>may be multiple-line docstring that is embedded within the .pyd
>extension module?  Might there be more lines in the docstring?

I don't know which IDE are you using, but try typing "help(AES.new)" 
or simply "help" (without quotes) in the interpreter.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From paul at subsignal.org  Thu Jan  4 15:47:38 2007
From: paul at subsignal.org (paul)
Date: Thu, 04 Jan 2007 21:47:38 +0100
Subject: Draw rectangle on a Window DC
In-Reply-To: <459cd1e4.0232d77c.0893.ffff821d@mx.google.com>
References: <459cd1e4.0232d77c.0893.ffff821d@mx.google.com>
Message-ID: <enjp54$jor$1@sea.gmane.org>

Raymond schrieb:
> Hi?
> 
> I want to Draw rectangle on Dc when gived a position. Can you teach me? Let
> me view your code?
Well, you haven't given us much background but I'd suggest if your boss
asks you to draw a rectangle on your corporate domain controller and the
position allows this, you better do so or you'll get fired.
Use chalk so you can wipe it off the case if your boss changes his/her
mind. Disclaimer: I haven't tested this and the DC might get unstable or
crash...

scnr
 Paul



From tiedon_jano at hotmail.com  Sat Jan  6 09:34:35 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Sat, 06 Jan 2007 14:34:35 GMT
Subject: howto overload with a NOP (empty statement)
In-Reply-To: <459f8b36$0$316$426a74cc@news.free.fr>
References: <adeb4$459f7a11$d443bb3a$14652@news.speedlinq.nl>
	<459f8b36$0$316$426a74cc@news.free.fr>
Message-ID: <%rOnh.183$_B1.123@read3.inet.fi>

Bruno Desthuilliers kirjoitti:
> Stef Mientki a ?crit :
>> How should I overload / disable a method ?
>> In the example below I have defined the class "Power_Supply", derived 
>> from baseclass "device".
> 
> <off>
> Naming conventions are to use CamelCase for class names. So it would be 
> better to name your classes 'PowerSupply' (no '_') and 'Device'. You're 
> of course free to use whatever naming convention you want, including no 
> convention at all, but Python relies *a lot* on naming conventions...
> </off>

Continuing with the style and idioms issues...

1. Don't leave a space between a function/method/class name and the 
opening parenthesis, i.e. instead of:
	def execute (self):
use:
	def execute(self):

2. It seems to me that you indent your code with 2 spaces. If I'm wrong, 
please ignore me. Otherwise: always use 4 spaces when indenting with spaces.

Following these and the numerous other guidelines (see 
htpp://www.python.org/dev/peps/pep-0008/ for example) on Python style 
you'll be making yourself and others a favor. When these coding 
guidelines become your habit, it will be easier for you to read the code 
of other Pythoners. This is important because a large part of learning 
consists of reading the code of others.

And also vice versa: when you show your code to others, it will be 
easier for them to concentrate on your problem when the idiosyncrasy of 
your code is not there to hinder.

Cheers,
Jussi


From tim at tdw.net  Mon Jan  8 13:40:00 2007
From: tim at tdw.net (Tim Williams)
Date: Mon, 8 Jan 2007 18:40:00 +0000
Subject: recursive function
In-Reply-To: <R62366725.468.1201.1@mxextra>
References: <1168265240.294223.298750@s80g2000cwa.googlegroups.com>
	<R62366725.468.1201.1@mxextra>
Message-ID: <9afea2ac0701081040i69023554od4414330ac6e53f9@mail.gmail.com>

On 8 Jan 2007 16:03:53 +0100, Neil Cerutti <horpner at yahoo.com> wrote:

>
> len(dict.keys()).
>

Or

len(dict)

:)


From ptmcg at austin.rr.com  Wed Jan 24 14:07:49 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 24 Jan 2007 11:07:49 -0800
Subject: Regex for URL extracting
In-Reply-To: <1169655624.981833.29730@j27g2000cwj.googlegroups.com>
References: <1169655624.981833.29730@j27g2000cwj.googlegroups.com>
Message-ID: <1169665668.999341.183480@a75g2000cwd.googlegroups.com>

On Jan 24, 10:20 am, "Johny" <pyt... at hope.cz> wrote:
> Does anyone know about a good regular expression  for URL extracting?
>
> J.
Google turns this up:

http://geekswithblogs.net/casualjim/archive/2005/12/01/61722.aspx

But I've seen other re's for this problem that are hundreds of
characters long.

-- Paul



From bj_666 at gmx.net  Wed Jan  3 03:47:44 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 03 Jan 2007 09:47:44 +0100
Subject: Synchronization methodology
References: <mailman.2231.1167803272.32031.python-list@python.org>
Message-ID: <pan.2007.01.03.08.47.43.379539@gmx.net>

In <mailman.2231.1167803272.32031.python-list at python.org>, Chris Ashurst
wrote:

> Hi, I'm coming in from a despised Java background, and I'm having some 
> trouble wrapping my head around sharing an object between multiple 
> instances of a single class (in simpler terms, I would say imagine a 
> simple chat server that has to share a list of connected users to each 
> instance of a connected user).
> 
> Usually, I would have a synchronized list instantiated inside each 
> instance of a client class, which would do the trick, but since there's 
> no synchronization in Python, I'm stuck staring at little tests 
> involving a standalone non-threaded class instance that holds the list 
> of users, and each connected user being passed this instance to be 
> "synchronized".

There's no ``synchronized`` keyword, but of course you can synchronize
methods.  You have to attach an `threading.RLock` to the objects you want
to synchronize on and use its `aquire()` and `release()` methods in places
where you used ``synchronized (someObject) { ... }`` in Java.

synchronized foo() { /* code */ }

is the same as

foo() {
  synchronized (this) { /* code */ }
}

in Java.  And that's basically:

def foo(self):
    self.lock.aquire()
    # code
    self.lock.release()

You may want to make sure the lock will be released in case of an
exception:

def foo(self):
    self.lock.aquire()
    try:
        pass # code
    finally:
        self.lock.release()

Ciao,
	Marc 'BlackJack' Rintsch


From nmm1 at cus.cam.ac.uk  Wed Jan 10 16:32:13 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 10 Jan 2007 21:32:13 GMT
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<1168452879.866265.36880@i39g2000hsf.googlegroups.com>
	<eo3bgm$c98$1@gemini.csx.cam.ac.uk>
	<mailman.2544.1168455985.32031.python-list@python.org>
	<eo3eqs$icv$1@gemini.csx.cam.ac.uk>
	<mailman.2545.1168463082.32031.python-lis
Message-ID: <eo3m0t$2r2$1@gemini.csx.cam.ac.uk>


In article <mailman.2545.1168463082.32031.python-list at python.org>,
"Carl J. Van Arsdall" <cvanarsdall at mvista.com> writes:
|> 
|> Just as something to note, but many HPC applications will use a 
|> combination of both MPI and threading (OpenMP usually, as for the 
|> underlying thread implementation i don't have much to say).  Its 
|> interesting to see on this message board this huge "anti-threading" 
|> mindset, but the HPC community seems to be happy using a little of both 
|> depending on their application and the topology of their parallel 
|> machine.  Although if I was doing HPC applications, I probably would not 
|> choose to use Python but I would write things in C or FORTRAN. 

That is a commonly quoted myth.

Some of the ASCI community did that, but even they have backed off
to a great extent.  Such code is damn near impossible to debug, let
alone tune.  To the best of my knowledge, no non-ASCI application
has ever done that, except for virtuosity.  I have several times
asked claimants to name some examples of code that does that and is
used in the general research community, and have so far never had a
response.

I managed the second-largest HPC system in UK academia for a decade,
ending less than a year ago, incidentally, and was and am fairly well
in touch with what is going on in HPC world-wide.


Regards,
Nick Maclaren.


From subscriber100 at rjs.org  Tue Jan  9 02:02:46 2007
From: subscriber100 at rjs.org (Ray Schumacher)
Date: Mon, 08 Jan 2007 23:02:46 -0800
Subject: multi-threaded webcam with SimpleAsyncHTTPServer.py
  (updated)
Message-ID: <6.2.3.4.2.20070108225547.02de5c40@rjs.org>

Better asyncore.loop use.
Also fixes a late bug in my first post of code: PILFile.seek(0) 
needed since PIL.save does not reset the pointer.


class ImageServer(RequestHandler):
     def __init__(self, conn, addr, server):
         asynchat.async_chat.__init__(self,conn)
         self.client_address = addr
         self.connection = conn
         self.server = server
         self.set_terminator ('\r\n\r\n')
         self.incoming = deque()
         self.outgoing = deque()
         self.rfile = None
         self.wfile = writewrapper(self.outgoing, -self.use_buffer or 
self.blocksize)
         self.found_terminator = self.handle_request_line
         self.request_version = "HTTP/1.1"
         self.code = None

     def send_head(self):
         buff, width, height = cam.dev.getbuffer()
         imPIL = (Image.frombuffer("RGB", (width, height), buff, 
"raw", "BGR", 0, -1) )
         PILFile.seek(0)
         imPIL.save(PILFile, "JPEG")
         self.send_response(200)
         self.send_header("Content-type", "image/jpeg")
         self.send_header("Content-Length: ", str(PILFile.len))
         self.end_headers()

         self.wfile.write(PILFile.getvalue())
         return
...

     parser.add_option('-3', dest='server',
                       help='Run the server for cam images',
                       action='store_const', const=3)
     options, args = parser.parse_args()
     if options.server==3:
         from StringIO import StringIO
         from PIL import Image
         if sys.platform == 'win32':
             import VideoCapture
             try:
                 del(cam)
                 gc.collect()
                 print "deleted old cam instance"
             except: pass
             cam = VideoCapture.Device(devnum=options.devNum, 
showVideoWindow=0)
             print cam
             buff, width, height = cam.dev.getbuffer()
             PILFile = StringIO()
         else:
             pass
             # try 
http://laurent.pointal.org/python/projets/pyvideograb/index.pih
             # or fg
             #import fg
             #cam = fg.Grabber()
             #cam.set_source(options.devNum)
             # or video4linux.video_capture / v4lctl
     else:
         if options.root is None:
             parser.error("Need root path to start server")

         if not os.path.isdir(options.root):
             parser.error("Root path does not exist")

         os.chdir(options.root)
     req_handler = which[options.server]
     s=Server('',options.port,req_handler)
     print req_handler.__name__, "running on port", options.port, 
"with root path", options.root
     while True:
         try: asyncore.loop(timeout=1, count=1)
         except KeyboardInter



From john.pye at gmail.com  Wed Jan 24 22:37:23 2007
From: john.pye at gmail.com (John Pye)
Date: 24 Jan 2007 19:37:23 -0800
Subject: Catching floating point errors from linked C code
Message-ID: <1169696243.262973.188540@s48g2000cws.googlegroups.com>

Hi all

I have some C code that is giving me some 'nan' values in some
calculations.  The C code is wrapped using SWIG to give me a Python
module that I am then exercising through a unittest suite.

It seems that I should expect the C code to throw floating point
exceptions (SIGFPE) and either the whole thing to abort, or for Python
to catch the errors and report them. Instead I'm getting neither. I
want to be able to track down the exact location of problems in my C
code.

Is there something that Python does to turn on/off the catching of
divide-by-zero errors, eg by manipulating <signal.h> signal handlers
and/or <fenv.h> settings?

Cheers
JP



From facundo at taniquetil.com.ar  Fri Jan 26 11:34:42 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Fri, 26 Jan 2007 16:34:42 +0000 (UTC)
Subject: Are there sprintf in Python???
References: <1169496238.925052.311660@l53g2000cwa.googlegroups.com>
Message-ID: <epdaj1$1fe$1@sea.gmane.org>

questions? wrote:


> Are there similar function to sprintf in C?

Meaning to print in a buffer? It's not necessary...

Remember that all the ways that prints on files, actually does not need
to print into *actual* files, but they can print into file-like objects
(see StringIO, or mmap, for example).

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From wd.jonsson at gmail.com  Tue Jan 23 04:59:37 2007
From: wd.jonsson at gmail.com (wd.jonsson at gmail.com)
Date: 23 Jan 2007 01:59:37 -0800
Subject: Noob Question: Force input to be int?
Message-ID: <1169546377.017596.43840@k78g2000cwa.googlegroups.com>

Hello everyone!
I have a piece of code that looks like this:

if len(BuildList) > 0:
    print "The script found %d game directories:" % len(BuildList)
    print
    num = 0
    for i in BuildList:
        print str(num) +"       " + i
        num = num + 1
    print
    print "Select a build number from 0 to " + str(len(BuildList) - 1)
    buildNum = int(raw_input('Select build #> '))

    while buildNum > (len(BuildList) -1) or buildNum <= -1:
        print
        print "Error: Invalid build number!"
        print "Select a build number from 0 to " + str(len(BuildList) -
1)
        print
        buildNum = int(raw_input('Select build: '))

The problem is with the while buildNum-loop. If the user enters a
non-numeric value in the buildNum input, the scripts throws an
exception. I need to constrict the user to ONLY use integers in the
input box. How can I solve this issue?



From george.sakkis at gmail.com  Sat Jan 27 01:18:20 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 26 Jan 2007 22:18:20 -0800
Subject: dict.keys() ?
In-Reply-To: <1169867048.004256.279240@v33g2000cwv.googlegroups.com>
References: <1169867048.004256.279240@v33g2000cwv.googlegroups.com>
Message-ID: <1169878700.198497.173550@v45g2000cwv.googlegroups.com>

On Jan 26, 10:04 pm, bearophileH... at lycos.com wrote:

> The PEP 3100:http://www.python.org/dev/peps/pep-3100/
> says:
>
> Return iterators instead of lists where appropriate for atomic type
> methods (e.g. dict.keys(), dict.values(), dict.items(), etc.); iter*
> methods will be removed. Better: make keys(), etc. return views ala
> Java collections???
> ...
> To be removed:
>    dict.setdefault()? [15]
>    dict.has_key() method [done]
>
> I may be sleepy now, but maybe the keys() method too can be removed;
> otherwise the following two become really the same:
>
> print list(adict)
> for k in adict: ...
>
> print list(adict.keys())
> for k in adict.keys(): ...

Alas, the consensus has moved away from simple iterators to less
lightweight "views":

http://svn.python.org/view/peps/trunk/pep-3106.txt?rev=53096&view=markup

"The objects returned by the .keys() and .items() methods behave like
sets with limited mutability; the allow removing elements, but not
adding them.(...) The object returned by the values() method behaves
like a multiset."

I for one am not convinced that adding three new types is worth the
complexity and the error-proneness of having two new
similar-but-not-quite-the-same APIs with sets. Not only iteration is
arguably the most common operation on a view, but the cost (in extra
keystrokes and runtime performance) of populating any container that
the user may need from an iterator is pretty low.

George



From gagsl-py at yahoo.com.ar  Wed Jan  3 18:43:16 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 03 Jan 2007 20:43:16 -0300
Subject: Unsubscribing from the list
In-Reply-To: <880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com
 >
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>
	<ene064$bm5$1@sea.gmane.org>
	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>
	<enghj3$qhf$1@sea.gmane.org>
	<880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070103204007.05697008@yahoo.com.ar>

At Wednesday 3/1/2007 13:21, Dotan Cohen wrote:

>The first sentance under the heading "Python-list Subscribers" is:
>The subscribers list is only available to the list administrator.
>Admin address: Password:
>
>As I'm not an admin, I read no further.

That page uses the default MailMan administrative interfase. Send a 
RFE to the MailMan developers.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From robert.kern at gmail.com  Tue Jan 16 03:33:57 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 16 Jan 2007 02:33:57 -0600
Subject: why scipy cause my program slow?
In-Reply-To: <1168935124.912419.147250@a75g2000cwd.googlegroups.com>
References: <1168935124.912419.147250@a75g2000cwd.googlegroups.com>
Message-ID: <eoi2lt$26h$1@sea.gmane.org>

HYRY wrote:
> Why the exec time of test(readdata()) and test(randomdata()) of
> following program is different?
> my test file 150Hz10dB.wav has 2586024 samples, so I set randomdata
> function
> to return a list with 2586024 samples.
> the exec result is:
> 2586024
> <type 'list'>
> 10.8603842736
> 2586024
> <type 'list'>
> 2.16525233979
> test(randomdata()) is 5x faster than test(readdata())
> if I remove "from scipy import *" then I get the following result:
> 2586024
> <type 'list'>
> 2.21851601473
> 2586024
> <type 'list'>
> 2.13885042216
> 
> So, what the problem with scipy?

You're importing (through scipy) numpy's sum() function. The result type of that
function is a numpy scalar type. The set of scalar types was introduced for a
number of reasons, mostly having to do with being able to represent the full
range of numerical datatypes that Python does not have builtin types for.
Unfortunately, the code paths that get executed when arithmetic is performed
sith such scalars are still suboptimal; I believe they are still going through
the full ufunc machinery.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From duncan.booth at invalid.invalid  Sat Jan  6 17:33:26 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 6 Jan 2007 22:33:26 GMT
Subject: Recommended way to force a thread context switch?
References: <GzOnh.112$a81.91@nntpserver.swip.net>
	<1168103258.602286.146100@42g2000cwt.googlegroups.com>
	<1168104008.910681.46800@38g2000cwa.googlegroups.com>
	<mailman.2373.1168116439.32031.python-list@python.org>
	<Xns98B0D9B8ABB0Bduncanbooth@127.0.0.1>
	<mailman.2374.1168120599.32031.python-list@python.org>
Message-ID: <Xns98B0E573D7097duncanbooth@127.0.0.1>

Lloyd Zusman <ljz at asfast.com> wrote:

>> Why do you think that just letting the threads run won't have the
>> effect you desire? Leave it to the system to schedule the threads.
> 
> I can already see that they don't have the effect I desire.  They are
> long numerical calculations in tight loops.  I have to periodically
> put explicit time.sleep(0.001) calls in place to force the context
> switching, and I was wondering if that's the recommended method.
> 
Not really.

If the context isn't switching enough for you then try calling 
sys.setcheckinterval(n) with varying values of n until you find one which 
is suitable. Calling it with a lower value of n will increase the frequency 
that you switch thread contexts, although of course it will also increase 
the overall runtime for your program.

Alternatively you could try splitting your processing into smaller chunks 
and ensure each thread does a small chunk at a time instead of a large one.

Why does it matter whether individual threads are being 'starved'? Surely 
you want them all to complete in any case, so does it matter if they run 
sequentially or in parallel?



From tinaweb at bestemselv.com  Tue Jan 23 08:28:07 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Tue, 23 Jan 2007 14:28:07 +0100
Subject: PyQt4 strangeness
In-Reply-To: <mailman.3026.1169555288.32031.python-list@python.org>
References: <mLSdnfIBYsFkfijYRVnzvQ@telenor.com>
	<mailman.3026.1169555288.32031.python-list@python.org>
Message-ID: <L4idnVjjWeP1kCvYRVnzvA@telenor.com>

Phil Thompson wrote:
> The module structure of PyQt reflects the library structure of Qt. Qt4 has 
> different libraries to Qt3 so PyQt4 has different modules to PyQt3.
> 
> The top level PyQt4 module ensures that PyQt3, PyQt4 (and eventually PyQt5) 
> can all be installed side by side in the same site-packages directory.
> 
> The style of import statement you use is up to you. All of the PyQt4 examples 
> adopt the style you describe, but you can achieve the equivalent of your 
> current practice by doing the following instead...
> 
>     from PyQt4.Qt import *
> 
> Phil
Ah, I see :)
Thanks for the explanation.

Tina


From mccredie at gmail.com  Tue Jan  2 12:47:55 2007
From: mccredie at gmail.com (Matimus)
Date: 2 Jan 2007 09:47:55 -0800
Subject: how to use execfile with argument under windows
In-Reply-To: <1167757591.465076.314700@h40g2000cwb.googlegroups.com>
References: <1167757591.465076.314700@h40g2000cwb.googlegroups.com>
Message-ID: <1167760075.911634.173090@48g2000cwx.googlegroups.com>


>
> error output
> IOError: [Errno 2] No such file or directory:"filename.exe -type png
> -source sourcearg -file filename.png"

Use 'os.system' not 'execfile'. 'execfile' is for executing other
python scripts, not arbitrary command line.

Try this:

import os
...
...
os.system("filename.exe -type png -source sourcearg -file
filename.png")

> try
> execfile("d:\pathto\filename.exe -type png -source sourcearg -file
> filename.png")
>
> error output
> IOError: [Errno 2] No such file or directory:"d:\pathto\filename.exe
> filename.exe -type png -source sourcearg -file filename.png"

be careful with your '\'s they tend to get interpreted as escape
characters. You can prefix the string with an 'r', double them up or
use forward slashes.

One of the following should work:
r"d:\pathto\filename.exe -type png -source sourcearg -file
filename.png"
"d:\\pathto\\filename.exe -type png -source sourcearg -file
filename.png"
"d:/pathto/filename.exe -type png -source sourcearg -file filename.png"



From wolf_tracks at invalid.com  Mon Jan  8 00:48:32 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Mon, 08 Jan 2007 05:48:32 GMT
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <1168198159.798783.168010@i15g2000cwa.googlegroups.com>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
	<mailman.2332.1168016502.32031.python-list@python.org>
	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>
	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>
	<yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>
	<mailman.2367.1168100759.32031.python-list@python.org>
	<fK_nh.25689$QU1.17301@newssvr22.news.prodigy.net>
	<w03oh.46$_k2.22@read3.inet.fi>
	<P69oh.32493$Gr2.29258@newssvr21.news.prodigy.net>
	<1168194009.220437.286210@q40g2000cwq.googlegroups.com>
	<nKboh.11774$ZT3.8998@newssvr19.news.prodigy.com>
	<1168198159.798783.168010@i15g2000cwa.googlegroups.com>
Message-ID: <QWkoh.14891$sR.3880@newssvr29.news.prodigy.net>

Gabriel Genellina wrote:
> On 7 ene, 16:20, "W. Watson" <wolf_tra... at invalid.com> wrote:
> 
>> We seem to be looping. I have the Python interpreter. I would like the
>> pythonwin editor. The download link doesn't work on SourceForge. Where can I
>> get it? If not there, where? If it can't be obtained, then I'll go to the
>> default editor built into python-2.5.msi.
> 
> It *does* work for me. Try
> https://sourceforge.net/project/showfiles.php?group_id=78018&package_id=79063
> 
I can easily see the page you refer to, but where's the pythonwin editor?


          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

                 A road sign along many highways reads, "$1000
                 fine for littering" I have yet to find any
                 $1000 bills. WTW
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From horpner at yahoo.com  Tue Jan 16 07:29:51 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 16 Jan 2007 13:29:51 +0100
Subject: Anyone has a nice "view_var" procedure ?
References: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
	<mailman.2751.1168904043.32031.python-list@python.org>
Message-ID: <slrneqphem.1r4.horpner@FIAD06.norwich.edu>

On 2007-01-15, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Monday 15/1/2007 17:45, Stef Mientki wrote:
>
>>Is there some handy/ nice manner to view the properties of some variable ?
>>As a newbie, I often want to see want all the properties of a var,
>>and also some corner values (large arrays) etc.
>
> You can try dir(x), vars(x). If you want a "nice print", see
> the pprint module.
>
> py> import csv
> py> x = csv.DictReader('') # a bogus object
> py> x
><csv.DictReader instance at 0x00BC79B8>
> py> dir(x)
> ['__doc__', '__init__', '__iter__', '__module__', 'fieldnames', 
> 'next', 'reader'
> , 'restkey', 'restval']
> py> vars(x)
> {'restkey': None, 'restval': None, 'fieldnames': None, 'reader': 
><_csv.reader ob
> ject at 0x00BC98B8>}
> py> from pprint import pprint
> py> pprint(vars(x))
> {'fieldnames': None,
>   'reader': <_csv.reader object at 0x00BC98B8>,
>   'restkey': None,
>   'restval': None}
> py>

It's an unfortunately limited sort of introspection. To rehash a
recent experience:

>>> import re
>>> import pprint
>>> r = re.match("(x+)|(y+)", "xxx")
>>> pprint.pprint(dir(r))
['__copy__',
 '__deepcopy__',
 'end',
 'expand',
 'group',
 'groupdict',
 'groups',
 'span',
 'start']
>>> r.lastindex
1

The documentation is deliberately vague:

dir( [object]) 
  
  [...] The list is not necessarily
  complete. If the object is a module object, the list contains
  the names of the module's attributes. If the object is a type
  or class object, the list contains the names of its attributes,
  and recursively of the attributes of its bases. Otherwise, the
  list contains the object's attributes' names, the names of its
  class's attributes, and recursively of the attributes of its
  class's base classes. The resulting list is sorted
  alphabetically. [...]

It's unclear to me what attributes an object could have that
aren't included in the above list.

  Note: Because dir() is supplied primarily as a convenience for
  use at an interactive prompt, it tries to supply an interesting
  set of names more than it tries to supply a rigorously or
  consistently defined set of names, and its detailed behavior
  may change across releases. 

In other words, dir is just for fun, like monkey bars. ;)

-- 
Neil Cerutti
The eighth-graders will be presenting Shakespeare's Hamlet in the church
basement on Friday at 7 p.m. The congregation is invited to attend this
tragedy. --Church Bulletin Blooper


From nszabolcs at gmail.com  Mon Jan 29 10:01:23 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 29 Jan 2007 07:01:23 -0800
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <7x3b5uwfa2.fsf@ruckus.brouhaha.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<7x3b5uwfa2.fsf@ruckus.brouhaha.com>
Message-ID: <1170082883.393745.244840@a34g2000cwb.googlegroups.com>

> If you don't mind possibly getting a few nonalphanumeric characters:
>
> import os,binascii
> print binascii.b2a_base64(os.urandom(6))

what about

file('/dev/urandom').read(6).encode('base64')

(oneliner and without import sa op requested)



From robert.kern at gmail.com  Mon Jan 22 01:33:12 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 22 Jan 2007 00:33:12 -0600
Subject: pylab, matplotlib ... roots function question
In-Reply-To: <ep16t2$fa2$1@news2.rz.uni-karlsruhe.de>
References: <ep16t2$fa2$1@news2.rz.uni-karlsruhe.de>
Message-ID: <ep1lrk$94h$1@sea.gmane.org>

Sch?le Daniel wrote:
> Hello NG,
> 
> given this call to roots funtion from pylab

It's actually from numpy and numpy questions are best asked (and best answered!)
on numpy-discussion.

  http://www.scipy.org/Mailing_Lists

> In [342]: roots([0,2,2])
> Out[342]: array([-1.])
> 
> as far as I understand it [a0,a1,a2] stands for a0+a1*x+a2*x^2
> in the above case it yields 2x^2+2x = 2x(1+x)
> and the roots are 0 and -1
> I am wondering why roots function gives me only the -1

No, it's the other way around.

In [1]: from numpy import *

In [2]: roots?
Type:           function
Base Class:     <type 'function'>
Namespace:      Interactive
File:
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/numpy-1.0.2.dev3507-py2.5-macosx-10.4-i386.egg/numpy/lib/polynomial.py
Definition:     roots(p)
Docstring:
    Return the roots of the polynomial coefficients in p.

    The values in the rank-1 array p are coefficients of a polynomial.
    If the length of p is n+1 then the polynomial is
    p[0] * x**n + p[1] * x**(n-1) + ... + p[n-1]*x + p[n]


So you were really solving 2*x + 2 = 0, the single root of which is -1.

> second try
> 
> In [343]: roots([1,0,0])
> Out[343]: array([], dtype=float64)
> 
> ok, as it should be

No, that's actually wrong. What version of numpy are you using? With a recent
SVN checkout of numpy, I get the correct answer:

In [3]: roots([1,0,0])
Out[3]: array([ 0.,  0.])

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From ironfroggy at gmail.com  Sat Jan 13 14:49:19 2007
From: ironfroggy at gmail.com (ironfroggy at gmail.com)
Date: Sat, 13 Jan 2007 19:49:19 +0000 (GMT)
Subject: python-dev Summary for 2006-12-01 through 2006-12-15
Message-ID: <20070113194921.112A41E4004@bag.python.org>

python-dev Summary for 2006-12-01 through 2006-12-15
++++++++++++++++++++++++++++++++++++++++++++++++++++

.. contents::

[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2006-12-01_2006-12-15]



=============
Announcements
=============

Some of you may know that Steven Bethard, having taken over the summaries from
Brett Cannon some time ago, is no longer able to keep up with them. After much
holiday stress and busy days, I've come to take over this honor and archive all
the goings on here. I hope I can do a good job, and allow the summaries to
continue being a useful and transparent fixture.

Also, after catching up with my backlog of summary work, I plan to begin the
first summaries of python-3000 (and, possibly, but not likely, the python-
ideas list), as more and more actual work, rather than debating and theory-talk,
is going on there.

Sincerly,
Your new summary writer,
Calvin Spealman

=========
Summaries
=========

-------------------------
Indexing of Match Objects
-------------------------

Subscripting re match objects directly was proposed and the debate the waged
mostly on how to deal with slicing and m.group(0) to be the entire match. The
consensus seemed to be that returning a match object would break, largely
because m[1:2][0] != m[1], which breaks intuition with slices. Returning a list
as a slice also breaks the intuitions about the type of a slice.

Contributing thread:

- `a feature i'd like to see in python #2: indexing of match objects <http://mail.python.org/pipermail/python-dev/2006-December/070138.html>`__

----------------------------------------
Python and the Linux Standard Base (LSB)
----------------------------------------

Discussions about how to properly document the expected Python environment for
all LSB compliant distributions continued shortly. Focus was on how distros have
a need to split the standard library up, even if the entire thing is eventually
installed, and issues such as Tkinter requiring X leading to standard modules
being ommitted for flexable packages.

Contributing thread:

- `Python and the Linux Standard Base (LSB) <http://mail.python.org/pipermail/python-dev/2006-December/070112.html>`__

-------------------------------------
Number of Windows Installer Downloads
-------------------------------------

Guido was impressed with out download numbers on Windows, but most people just
attributed it to other platforms including and mirroring Python. Even taking
that to consideration, the ratio of Windows to source downloads has shifted in
Windows favor a good bit. The use of Python in introductory courses at MIT was
mentioned as something to push these numbers further in the near future.

Contributing thread:

- `[Python-checkins] MSI being downloaded 10x more than all other files?! <http://mail.python.org/pipermail/python-dev/2006-December/070294.html>`__

--------------------------
Deletion Through Iterators
--------------------------

The request was made to allow direct deletion of items from iterables through
the iterator, but the idea was deemed unscalable to iterables in general and
broken with dictionaries. The solutions to work around the problem were given
and generally agreed to be sufficient (such as copying all the items you want
to keep, instead).

Contributing thread:

- `a feature i'd like to see in python #1: better iteration control <http://mail.python.org/pipermail/python-dev/2006-December/070137.html>`__

-------------------------
LSB: Binary compatibility
-------------------------

The other side of the LSB issue was discussed, related to the CPython ABI, the
.pyc bytecode and the marshall formats, and exactly which versions of Python
may or may not gain a standard ABI, as well as how to carry this forward to
future (already existing and evolving) version of Python. Some mention was made
of the difficulties and conflicts being brought on by the idea of LSB standards
for Python, while the benefits of this were challenged.

Contributing thread:

- `LSB: Binary compatibility <http://mail.python.org/pipermail/python-dev/2006-December/070191.html>`__

----------------------------------------
Adding resume (206) support to urllib(2)
----------------------------------------

Daniel Watkins asked about adapting his HTTP resuming support into urllib, but
suggestions directly moved this to urllib2 and then to httplib. The conversation
quickly drifted into talking about how abstract and minimal the urllib(2) should
be, while the httplib module may grow increasing complex and feature supporting.
The original poster made no final comment on his intentions to follow through
with the patch.

Contributing thread:

- `Adding resume (206) support to urllib(2) <http://mail.python.org/pipermail/python-dev/2006-December/070320.html>`__

-------------------
__str__ and unicode
-------------------

The details of what an object's __str__() method must return were inquired. Must
the string returned by a str or any basestring? It was announced to allow
unicode objects, with no restriction on content. However, the caution that the
return is likely to be encoded into the default encoding was given.

Contributing thread:

- `__str__ and unicode <http://mail.python.org/pipermail/python-dev/2006-December/070237.html>`__

----------------------------------
LSB: Selection of a Python version
----------------------------------

Martin v. Lowis announced that LSB will likely move forward with Python 2.4 as
the first LSB standard Python version. How to handle future bug patches, as well
as the comfort of the distributions for being required to support an outdated
package (2.4 is already "retired") was considered. The consensus settled on a
documented support for 2.4 moving forward with security patches, and likely
even 2.3, as security patches are rare enough to not cause too many cycles to
be spent on them.

Contributing thread:

- `LSB: Selection of a Python version <http://mail.python.org/pipermail/python-dev/2006-December/070189.html>`__

------------------------------
Threading, atexit, and logging
------------------------------

A bug (#1566280) was previously reported, related to the ordering of the atexit
handlers for the logging and threading modules. Participants in the thread had
a general agreement that the threading module using such a user visiable
mechanism for cleanup and lifetime was a bad design in the first place to be
remedied.

Contributing thread:

- `Threading, atexit, and logging <http://mail.python.org/pipermail/python-dev/2006-December/070233.html>`__

-----------------------------------
Creating dicts from dict subclasses
-----------------------------------

The built-in types can now be subclassed, but C code doesn't always realize
this, and relies too heavily on the internals of the base class.  In this case,
PyDict_Merge was assuming too much; replacing the PyDict_Check test with
PyDict_CheckExact fixed the bug, but slowed things down a lot.

Walter Dorwald suggested adding a not-quite-as-fast path for sensible mappings
(including dict subclasses).  Unfortunately, there was a bit of disagreement
over what constituted "sensible".  Should the middle-speed path use iteration
over items (the exact content it needed), over keys (a bit faster in the current
implemententation), or not even exist (to avoid limiting future
implementations)?

As of Jan 8, 2007, SVN has not been updated; there is no middle-speed path, and
the bug is still possible.

(Summary contributed by Jim Jewett)

Contributing thread:

- `Creating dicts from dict subclasses <http://mail.python.org/pipermail/python-dev/2006-December/070334.html>`__

-----------------------------------------------------------------------------
OT: World's oldest ritual discovered. Worshipped the python 70, 000 years ago
-----------------------------------------------------------------------------

This was a quick and off-topic post about other instances of python symbolism in
ancient humanity, including a definition of our word "pythonic" to mean
"prophetic", which seems fitting enough.

Contributing thread:

- `OT: World's oldest ritual discovered. Worshipped the python 70, 000 years ago <http://mail.python.org/pipermail/python-dev/2006-December/070123.html>`__

------------------
LSB: pyc stability
------------------

The LSB meetings brought up the issue of standardized bytecode formats, again.
This has always been something discouraged from Python. Keeping the bytecode
format free and the implementation open to ignoring old versions, has always
been helpful for maintanence and development. The common reasoning of protecting
IP was used, although most in-the-know consider this to be a false sense of
security. Reguardless, it might be useful in legal ways, as trade secrets do
require a reasonable attempt at hidding them in order to be recognized as such.

The possible solution of importing encypted zip packages with a custom import
hook was proposed and seems logical.

Contributing thread:

- `LSB: pyc stability <http://mail.python.org/pipermail/python-dev/2006-December/070187.html>`__

-------------------------------
Interpolated Strings (ala perl)
-------------------------------

Perl/PHP style string interpolation was brought up, but is found unreasonable
for various reasons. Cons include the use of format strings in scopes outside
where they are defined, the dangers of eval, and possibly the general resisting
of any idea coming from Perl. This seems a highly unlikely proposal.

Contributing thread:

- `features i'd like [Python 3000?] ... #4: interpolated strings ala perl <http://mail.python.org/pipermail/python-dev/2006-December/070173.html>`__

---------------------------
Polling with Pending Calls?
---------------------------

Issues with the RPM library blocking interupts for long periods of time were
brought up with proposed fixes by patching the rpmlib bindings to
"automagically" poll for any pending calls. An existing patch was suggested but
did not seem to fit the case at hand.

Contributing thread:

- `Polling with Pending Calls? <http://mail.python.org/pipermail/python-dev/2006-December/070181.html>`__

---------------------
Cross-compile Patches
---------------------

Patch 1597850 is being actively worked, and will improve the experience when
compiling python for freeBSD from a linux environment.

Contributing thread:

- `cross-compile patches <http://mail.python.org/pipermail/python-dev/2006-December/070216.html>`__

------------------------------------
Open CPython VM for type information
------------------------------------

Would it make sense to modify the CPython virtual machine (bytecode) so that it
was easier for other programs to produce bytecode?  Answer: No -- those programs
should produce either C (which gets called as a function) or python (which gets
interpreted by the python interpreter -- there are already interpreters that
don't use CPython bytecode.

Contributing thread:

- `Open CPython VM for type information <http://mail.python.org/pipermail/python-dev/2006-December/070328.html>`__

===============
Skipped Threads
===============

- `Weekly Python Patch/Bug Summary <http://mail.python.org/pipermail/python-dev/2006-December/070119.html>`__
- `Windows SDK <http://mail.python.org/pipermail/python-dev/2006-December/070308.html>`__
- `help for a noob - version for a sharp ARM <http://mail.python.org/pipermail/python-dev/2006-December/070286.html>`__
- `fileinput module tests <http://mail.python.org/pipermail/python-dev/2006-December/070307.html>`__
- `fpectl: does a better implementation make sense? <http://mail.python.org/pipermail/python-dev/2006-December/070118.html>`__
- `Small tweak to tokenize.py? <http://mail.python.org/pipermail/python-dev/2006-December/070127.html>`__
- `features i'd like [Python 3000] ... #3: fix super() <http://mail.python.org/pipermail/python-dev/2006-December/070168.html>`__
- `Makefile.pre.in Patch <http://mail.python.org/pipermail/python-dev/2006-December/070172.html>`__
- `Python and LSB: Meeting Report <http://mail.python.org/pipermail/python-dev/2006-December/070186.html>`__
- `Virtual Python (was Re: Python and the Linux Standard Base (LSB)) <http://mail.python.org/pipermail/python-dev/2006-December/070194.html>`__
- `DRAFT: python-dev summary for 2006-11-16 through 2006-11-30 <http://mail.python.org/pipermail/python-dev/2006-December/070229.html>`__
- `Looking for new Python-Dev Summarizers <http://mail.python.org/pipermail/python-dev/2006-December/070232.html>`__
- `Adding C99 bool to struct module <http://mail.python.org/pipermail/python-dev/2006-December/070276.html>`__
- `Spam and semi-spam and neo-spam <http://mail.python.org/pipermail/python-dev/2006-December/070284.html>`__
- `Next PyPy sprint: Leysin 8-14th January 2007 <http://mail.python.org/pipermail/python-dev/2006-December/070217.html>`__
- `Distribution tools: What I would like to see <http://mail.python.org/pipermail/python-dev/2006-December/070234.html>`__
- `RealClearPolitics - Articles - Exit Rumsfeld, Smiling <http://mail.python.org/pipermail/python-dev/2006-December/070283.html>`__





========
Epilogue
========

This is a summary of traffic on the `python-dev mailing list`_ from
December 01, 2006 through December 15, 2006.
It is intended to inform the wider Python community of on-going
developments on the list on a semi-monthly basis.  An archive_ of
previous summaries is available online.

An `RSS feed`_ of the titles of the summaries is available.
You can also watch comp.lang.python or comp.lang.python.announce for
new summaries (or through their email gateways of python-list or
python-announce, respectively, as found at http://mail.python.org).

This python-dev summary is the 1st written by Calvin Spealman.

To contact me, please send email:

- Calvin Spealman (ironfroggy at gmail dot com)

Do *not* post to comp.lang.python if you wish to reach me.

The `Python Software Foundation`_ is the non-profit organization that
holds the intellectual property for Python.  It also tries to advance
the development and use of Python.  If you find the python-dev Summary
helpful please consider making a donation.  You can make a donation at
http://python.org/psf/donations.html .  Every cent counts so even a
small donation with a credit card, check, or by PayPal helps.


--------------------
Commenting on Topics
--------------------

To comment on anything mentioned here, just post to
`comp.lang.python`_ (or email python-list at python.org which is a
gateway to the newsgroup) with a subject line mentioning what you are
discussing.  All python-dev members are interested in seeing ideas
discussed by the community, so don't hesitate to take a stance on
something.  And if all of this really interests you then get involved
and join `python-dev`_!


-------------------------
How to Read the Summaries
-------------------------

This summary is written using reStructuredText_. Any unfamiliar
punctuation is probably markup for reST_ (otherwise it is probably
regular expression syntax or a typo :); you can safely ignore it.  We
do suggest learning reST, though; it's simple and is accepted for
`PEP markup`_ and can be turned into many different formats like HTML
and LaTeX.

.. _python-dev: http://www.python.org/dev/
.. _python-dev mailing list: http://mail.python.org/mailman/listinfo/python-dev
.. _comp.lang.python: http://groups.google.com/groups?q=comp.lang.python
.. _PEP Markup: http://www.python.org/peps/pep-0012.html

.. _reST:
.. _reStructuredText: http://docutils.sf.net/rst.html
.. _Python Software Foundation: http://python.org/psf/

.. _archive: http://www.python.org/dev/summary/
.. _RSS feed: http://www.python.org/dev/summary/channews.rdf




From hpk at trillke.net  Mon Jan 22 11:14:43 2007
From: hpk at trillke.net (holger krekel)
Date: Mon, 22 Jan 2007 17:14:43 +0100
Subject: PyPy trillke sprints (Feb/March 2007)
Message-ID: <20070122161443.GV16915@solar.trillke>

=========================================================================
PyPy Trillke "EU and beyond!" sprints (25-28th Feb, 1-5th March 2006)
=========================================================================
..    image:: http://www.trillke.net/images/HausPanorama0304_113kb.jpg

Some two years and some thousands of commits later, the EU
project period of the PyPy (http://codespeak.net/pypy) project
is about to close ...  and a new period to begin: we are going
for a sprint of three days of focusing on EU reports and
administrative issues, and another three day sprint of happy 
hacking on the numerous interesting open ends of PyPy, 
the source code.    

We also intend to discuss and state our view on the time after
the EU period (March 2007 is the last EU funded month),
because clearly the project will not stop after our successful
(knock knock!) completion of the EU project.  It's already
clear that some of us seriously plan for a relaxation time, 
i.e. one without having many obligations.  But that should
not keep us from thinking and envisioning the development 
from April on.  

So to the Sprint: we have two parts of the sprint, first the EU 
and second the public all-invited part:: 

    26th Feb - 28th Feb     EU reports and adminstrative sprint
    1st March               break day / arrival for coding sprint
    2nd March - 4th March   public coding "beyond EU" sprint days

All days are meant as full days, so please arrive 25th Feb / 1st March 
and leave 5th March if you can (this help us with pairing, introductions 
and logistical planning). 

---------------------------------------------
Possible Topics for the coding sprint 
---------------------------------------------

* working on .NET, Java and other backends 

* working on the Javascript, Prolog or a new frontend

* Tuning the JIT, refining approaches `[1]`_

* Fixing PyPy-1.0 problems / improving it (PyPy-1.0 is
  scheduled for Mid February, btw)

* improving the py lib/py.test, build environments, preparing 
  for server administration efforts from April on 

* Work on/with prototypes that use the new features that PyPy enables:
  distribution `[2]`_ (based on transparent proxying `[3]`_),
  security `[4]`_, persistence `[5]`_, etc. `[6]`_.

* discussion about the time after March, and how to
  organize/co-ordinate ourselves 

* all topics that are of interest otherwise (including
  maybe working on some particular EU related topics still!) 

.. _[1]: http://codespeak.net/pypy/dist/pypy/doc/jit.html
.. _[2]: http://codespeak.net/svn/pypy/dist/pypy/lib/distributed/
.. _[3]: http://codespeak.net/pypy/dist/pypy/doc/proxy.html
.. _[4]: http://codespeak.net/pypy/dist/pypy/doc/project-ideas.html#security
.. _[5]: http://codespeak.net/pypy/dist/pypy/doc/project-ideas.html#persistence
.. _[6]: http://codespeak.net/pypy/dist/pypy/doc/project-ideas.html

-----------------------
Location 
-----------------------

The sprint takes place at the 

    Trillke Gut 
    Steinbergstr. 42
    Hildesheim, Germany 
    http://www.trillke.net

If you come to Hildesheim main station, take the 

    Bus Number 3 (Hildesheimer Wald)

and get out at "Waldquelle".  Walking back a 100 meters gets you
to a small street on the right leading to a big white building, the
Trillke Gut. 

We'll have at least one larger room for sprinting,
and a kitchen for our use.  

-----------------------
Accomodation 
-----------------------

We can probably arrange for some cheap or no-cost private 
accomodation, in private rooms located up in the house 
(and being part of "living groups" of 5-10 people).  

There also is a nice Guest house that has been used
during recent events: 

    http://www.gaestehaus-klocke.de/

and a four-star hotel 500 meters away from the Trillke:

    http://www.berghoelzchen.de/

-----------------------
Registration
-----------------------

please subscribe to the pypy-sprint mailing list 

  http://codespeak.net/mailman/listinfo/pypy-sprint

and register by subversion: 

  http://codespeak.net/svn/pypy/extradoc/sprintinfo/trillke-2007/people.txt

or - if you have no checkin-rights - post to the pypy-sprint list
above. 

-- 
merlinux GmbH       Steinbergstr. 42    31139 Hildesheim   
http://merlinux.de  tel +49 5121 20800 75 (fax 77) 


From smusnmrNOSPAM at yahoo.com  Thu Jan  4 11:00:33 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Thu, 4 Jan 2007 17:00:33 +0100
Subject: pow() works but sqrt() not!?
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
	<459d0a1c_6@news.bluewin.ch>
Message-ID: <enj8b3$crq2$1@zam602.zam.kfa-juelich.de>

Thanks for that, too!

Would be interesting to learn how these different algorithms influence the 
precision of the result!?



"Boris Borcic" <bborcic at gmail.com> schrieb im Newsbeitrag 
news:459d0a1c_6 at news.bluewin.ch...
> siggi wrote:
>> Hi all,
>>
>> this is a newbie question on :
>> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] 
>> on
>> win32
>> PC with WinXP
>>
>> In
>> http://www.python.org/doc/2.3.5/lib/module-math.html
>> I read:
>>
>> "sqrt( x) Return the square root of x."
>>
>> Now the test for module math with function pow():
>> ---------------------------------------------------
>>>>> pow(9,9)
>> 387420489
>>
>>  Fine, but sqrt() fails:
>> -------------------
>
> BTW note that (of course) you can write pow(x,.5) or x**.5 for sqrt(x)
> without any preliminary import statement 




From eastera at gmail.com  Mon Jan  1 05:43:07 2007
From: eastera at gmail.com (JTree)
Date: 1 Jan 2007 02:43:07 -0800
Subject: A question about unicode() function
In-Reply-To: <1167571210.084436.311610@48g2000cwx.googlegroups.com>
References: <1167571210.084436.311610@48g2000cwx.googlegroups.com>
Message-ID: <1167648187.190860.123680@k21g2000cwa.googlegroups.com>

Thanks everyone!

Sorry for my ambiguous question.
I changed the codes and now it works fine.



JTree wrote:
> Hi,all
>      I encountered a problem when using unicode() function to fetch a
> webpage, I don't know why this happenned.
>      My codes and error messages are:
>
>
> Code:
> #!/usr/bin/python
> #Filename: test.py
> #Modified: 2006-12-31
>
> import cPickle as p
> import urllib
> import htmllib
> import re
> import sys
>
> def funUrlFetch(url):
>     lambda url:urllib.urlopen(url).read()
>
> objUrl = raw_input('Enter the Url:')
> content = funUrlFetch(objUrl)
> content = unicode(content,"gbk")
> print content
> content.close()
>
>
> error message:
>
> C:\WINDOWS\system32\cmd.exe /c python test.py
> Enter the Url:http://www.msn.com
> Traceback (most recent call last):
>   File "test.py", line 16, in ?
>     content = unicode(content,"gbk")
> TypeError: coercing to Unicode: need string or buffer, NoneType found
> shell returned 1
> Hit any key to close this window...
> 
> Any suggestions would be appreciated!
> 
> Thanks!



From bdesth.quelquechose at free.quelquepart.fr  Mon Jan  8 15:34:44 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 08 Jan 2007 21:34:44 +0100
Subject: Working with Excel inside Python
In-Reply-To: <LHeoh.407$uL1.363@newsfe22.lga>
References: <1168205727.130771.257030@51g2000cwl.googlegroups.com>
	<LHeoh.407$uL1.363@newsfe22.lga>
Message-ID: <45a2a49c$0$291$426a74cc@news.free.fr>

gblais at cox.net a ?crit :
> Or, you might want to look at two packages:
> 
> xlrd
> 
> pyExcelerator
> 
> The first can "read" .xls files, and the second can write them.  I've had
> great results with both.

That's fine, but since the OP is mainly using Excel for reformating a 
csv file and saving it as a dbf file, I fail to see how these packages 
would help...



From bdesth.quelquechose at free.quelquepart.fr  Fri Jan  5 08:26:07 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 05 Jan 2007 14:26:07 +0100
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
Message-ID: <459e4bbf$0$289$426a74cc@news.free.fr>

jeremito a ?crit :
> I am writing a class that is intended to be subclassed.  What is the
> proper way to indicate that a sub class must override a method?

class Base(object):
   def method_to_override(self, *args, **kw):
     raise NotImplementedError("You need to override this method")




From Robert.Katic at gmail.com  Tue Jan 16 17:54:29 2007
From: Robert.Katic at gmail.com (goodwolf)
Date: 16 Jan 2007 14:54:29 -0800
Subject: arguments of a function/metaclass
In-Reply-To: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>
References: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>
Message-ID: <1168988065.361547.141670@38g2000cwa.googlegroups.com>


rubbishemail at web.de je napisao/la:
> Hello,
>
>
> I have a member function with many (20) named arguments
>
> def __init__(self,a=1,b=2):
>     self.a=a
>     self.b=b
>
> I would like to get rid of the many redundant lines like self.a=a and
> set the members automatically.
> The list of default arguments could be given like
>
> def __init__(**kwargs):
>     arglist={"a":1,"b":2]
>
> if this makes things easier
>
> Of course there has to be a check that raises an error in case of an
> unknown argument not mentioned in this list.
>
>
> I am sure there is an elegant way how to do this, could you give me any
> hints???
>
>
> Many thanks
>
>
>
> Daniel

def changeattrs(obj, __dict, **kwargs):
    for name, value in __dict.iteritems():
        if hasattr(obj, name):
            setattr(obj, name, value)
        else:
            raise AttributeError
    for name in kwargs:
        if hasattr(obj, name):
            setattr(obj, name, kwargs[name])
        else:
            raise AttributeError


def locals2self(depth=0):
    import sys
    ns = sys._getframe(depth+1).f_locals
    obj = ns['self']
    for name, value in ns.iteritems():
        if name != 'self':
            setattr(obj, name, value)





class C1(object):
    def __init__(self, a=1, b=2, c=3, d=4):
        locals2self()



class C2(object):
    a = 1
    b = 2
    c = 3
    d = 4
    
    def __init__(self, **kwargs):
        changeattrs(self, kwargs)



From nagle at animats.com  Fri Jan 12 00:54:42 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 12 Jan 2007 05:54:42 GMT
Subject: Wierd M2Crypto bug - phony "peer did not return certificate" error
In-Reply-To: <ZsednYtgeIfeVTvYnZ2dnUVZ_hydnZ2d@comcast.com>
References: <YK%oh.17173$sR.6972@newssvr29.news.prodigy.net>
	<ovWdnZTGuYL38jjYnZ2dnUVZ_rqdnZ2d@comcast.com>
	<1168543799.097737.127930@i56g2000hsf.googlegroups.com>
	<ZsednYtgeIfeVTvYnZ2dnUVZ_hydnZ2d@comcast.com>
Message-ID: <CoFph.33142$Gr2.8155@newssvr21.news.prodigy.net>

Heikki Toivonen wrote:
> nagle at animats.com wrote:
> 
>>  That's a problem for me.  I need short timeouts; I'm accessing sites
>>that might or might not have SSL support, and I need to quickly time
>>out when there's no SSL server.
> 
> 
> You should be able to do short timeouts, just not using the global
> setdefaulttimeout. Have you tried Connection.set_socket_read/write_timeout?

     Yes.  That does not affect the connect timeout; it's only effective once
the connection has been opened.  And adjusting the session timeout
just recreates the blocking/non blocking problem.

     Incidentally, "get_socket_read_timeout()" doesn't work.  Generates
"EXCEPTION at socket level: unpack str size does not match format",
every time, at least with Python 2.4 on Windows.  The lower level
function returns one number as a string, like "7200", and the unpack
function tries to unpack it as "ll", which fails.

> Also like I mentioned before, if you use the Twisted wrapper and let
> Twisted handle network stuff you should be fine.

     That would mean struggling with Twisted and dealing with its bugs.
(For example, has the MySQLdb mess been resolved for Twisted's API?)
This isn't a long-running application; it usually runs as a CGI program.
So Twisted is inappropriate.

> M2Crypto and pyOpenSSL (and pyOpenSSL-extended, which you might want to
> take a look at as well) are implemented pretty differently, so merging
> seems unlikely. They are pretty small code wise, though, so it is not an
> impossible task.

     That seened good idea, and so I downloaded the source and tried to build
it on a Windows machine to run with Python 2.4.  But that build needs
(exactly) Visual Studio 7.1, which I don't have.  It also wants a specific
version of OpenSSL, and has a build file which seems to assume a 1998 version
of Visual C++.  The last change was in 1995, and it's still at an 0.x version,
so it's effectively abandonware.  I have some doubts that it really works
any more. I saw some Python 2.2/2.3 specific code in there.

     I could try building on a Linux system, but it's useful to me if Python
works on both Windows and Linux.
> 
> Personally I think I'd prefer if Python stdlib contained a better SSL
> module that did at least all the checks required for safe SSL
> connection. (Yeah, yeah, maybe I need to write it myself if nobody else
> gets to it;)

     What I need is proper SSL operation, certificate chain validation,
useful exception info when a connection fails (including why), and
read acess to the certificate itself in some reasonably sane form.
And I need to time out an SSL connection if it can't connect and
verify within 4 seconds.  It's embarassing that this doesn't work,
despite four different wrappers for OpenSSL.

     I'm willing to spend a few hundred dollars towards making this happen.

				John Nagle


From ricli576 at student.liu.se  Thu Jan 18 21:54:59 2007
From: ricli576 at student.liu.se (Rickard Lindberg)
Date: 18 Jan 2007 18:54:59 -0800
Subject: Match 2 words in a line of file
References: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
	<1169166223.073714.109620@51g2000cwl.googlegroups.com>
	<1169172293.938820.103400@51g2000cwl.googlegroups.com>
	<1169172954.107365.133950@51g2000cwl.googlegroups.com>
Message-ID: <1169175299.490994.244700@51g2000cwl.googlegroups.com>

I see two potential problems with the non regex solutions.

1) Consider a line: "foo (bar)". When you split it you will only get
two strings, as split by default only splits the string on white space
characters. Thus "'bar' in words" will return false, even though bar is
a word in that line.

2) If you have a line something like this: "foobar hello" then "'foo'
in line" will return true, even though foo is not a word (it is part of
a word).



From sxn02 at yahoo.com  Thu Jan 11 10:45:56 2007
From: sxn02 at yahoo.com (Sorin Schwimmer)
Date: Thu, 11 Jan 2007 07:45:56 -0800 (PST)
Subject: Python 2.5 install on Gentoo Linux: failed dmb and _tkinter
Message-ID: <305847.86110.qm@web56012.mail.re3.yahoo.com>

> Did you add /usr/local/lib to /etc/ld.so.conf?

It's there

Sorin


 
____________________________________________________________________________________
Do you Yahoo!?
Everyone is raving about the all-new Yahoo! Mail beta.
http://new.mail.yahoo.com


From steven.bethard at gmail.com  Sun Jan 21 23:27:39 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 21 Jan 2007 21:27:39 -0700
Subject: pyparsing Combine without merging sub-expressions
In-Reply-To: <1169417733.814587.63560@11g2000cwr.googlegroups.com>
References: <D8OdnfDqyvnyHS_YnZ2dnUVZ_syunZ2d@comcast.com>
	<1169417733.814587.63560@11g2000cwr.googlegroups.com>
Message-ID: <QYSdnZEMzLCroCnYnZ2dnUVZ_uTinZ2d@comcast.com>

Paul McGuire wrote:
> Steven Bethard wrote:
>> Within a larger pyparsing grammar, I have something that looks like::
>>
>>      wsj/00/wsj_0003.mrg
>>
>> When parsing this, I'd like to keep around both the full string, and the
>> AAA_NNNN substring of it, so I'd like something like::
>>
>>      >>> foo.parseString('wsj/00/wsj_0003.mrg')
>>      (['wsj/00/wsj_0003.mrg', 'wsj_0003'], {})
>>
>> How do I go about this? I was using something like::
>>
>>      >>> digits = pp.Word(pp.nums)
>>      >>> alphas = pp.Word(pp.alphas)
>>      >>> wsj_name = pp.Combine(alphas + '_' + digits)
>>      >>> wsj_path = pp.Combine(alphas + '/' + digits + '/' + wsj_name +
>>      ... '.mrg')
[snip]
> BUT, if all you want is to be able to easily *access*
> that sub-field, then why not give it a results name?  Like this:
> 
> wsj_name = pp.Combine(alphas + '_' + digits).setResultsName("name")
> 
> Leave everything else the same, but now you can access the name field
> independently from the rest of the combined tokens.

Works great.  Thanks!

STeVe


From paul at boddie.org.uk  Fri Jan 12 05:42:06 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 12 Jan 2007 02:42:06 -0800
Subject: Read from database, write to another database, simultaneously
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
	<50l9dlF1fuc1sU1@mid.individual.net>
	<eo4sor$du4$1@upsn250.cri.u-psud.fr>
	<1168519760.894380.303990@i39g2000hsf.googlegroups.com>
	<33vph.8825$pQ3.2190@newsread4.news.pas.earthlink.net>
	<1168540582.125402.78850@p59g2000hsd.googlegroups.com>
	<OAEph.9009$pQ3.4733@newsread4.news.pas.earthlink.net>
Message-ID: <1168598526.500293.186850@a75g2000cwd.googlegroups.com>

Dennis Lee Bieber wrote:
>  The problem though, is that the original poster claimed the Oracle
> data was being emitted in multiple chunks, not as a single output -- and
> they want to avoid collecting the data in a temporary file...

I think he wanted to know whether concurrent reads from Oracle and
writes to PostgreSQL would be faster or more efficient. I'd argue that
the temporary file approach is likely to be faster and more efficient
(disk space usage for temporary files disregarded). Sure, if you can
have two concurrent processes with minimal contention, one reading from
Oracle, one writing to PostgreSQL, where the PostgreSQL one never lags
behind and thus completes shortly after the Oracle data has been
completely downloaded, then that might be the ideal solution, but I'm
inclined to believe that unless the stream of data from Oracle were
arriving really slowly, it wouldn't work out that way.

Anyway, that's what my experiences with PostgreSQL suggest so far.
Further commentary on the topic is, as noted, available in the manual.

Paul



From bborcic at gmail.com  Thu Jan  4 09:06:42 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Thu, 04 Jan 2007 15:06:42 +0100
Subject: pow() works but sqrt() not!?
In-Reply-To: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
Message-ID: <459d0a1c_6@news.bluewin.ch>

siggi wrote:
> Hi all,
> 
> this is a newbie question on :
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on
> win32
> PC with WinXP
> 
> In
> http://www.python.org/doc/2.3.5/lib/module-math.html
> I read:
> 
> "sqrt( x) Return the square root of x."
> 
> Now the test for module math with function pow():
> ---------------------------------------------------
>>>> pow(9,9)
> 387420489
> 
>  Fine, but sqrt() fails:
> -------------------

BTW note that (of course) you can write pow(x,.5) or x**.5 for sqrt(x)
without any preliminary import statement


From etatoby at gmail.com  Sat Jan 27 10:52:12 2007
From: etatoby at gmail.com (Toby)
Date: 27 Jan 2007 15:52:12 GMT
Subject: Commandline wrapper: help needed
Message-ID: <45bb7527$0$20806$5fc30a8@news.tiscali.it>

I'm trying to write a simple commandline wrapper: a script that runs
another program as a child and relays unbuffered stdin and stdout
to/from the child process, possibly filtering it.

The usefulness of such a program lies in the filtering stage, in a
possible integration with readline, or in other interface enhancements.

Still, I'd like to discuss with you the unfiltered, unembellished
version, because I'm not satisfied with it and because I'm having some
minor problems.

Here's the script:


#!/usr/bin/python

import sys, os, thread

def stdin_handler(child_stdin):
  while True:
    d = sys.stdin.read(1)
    if not d: break
    child_stdin.write(d)
    child_stdin.flush()
  child_stdin.close()

def stdout_handler(child_stdout):
  while True:
    try:
      d = child_stdout.read(1)
      if not d: break
      sys.stdout.write(d)
      sys.stdout.flush()
    except KeyboardInterrupt:
      pass

def wrap(cmd):
  child_stdin, child_stdout = os.popen2(cmd)
  thread.start_new_thread(stdin_handler, (child_stdin,))
  stdout_handler(child_stdout)

if __name__ == '__main__':
  wrap(sys.argv[1])


You invoke it passing a program name as the first argument (such as
bash, python itself, sbcl, whatever) and then you interact with the
child process as if this wrapper wasn't there.  Ctrl-C and Ctrl-D work
as expected, sending SIGINT (that the child program can catch) and
closing stdin respectively.

Problems:

1.

I don't like the read(1) loops.  I'd like to be able to read bigger
chunks at a time, but I haven't found a way to do that while keeping the
functionality intact.  I have tried fidgeting with select() but I didn't
get far.  What I (think I) need is a non-blocking read(), but I'm not
sure how to achieve that, at least with Python 2.4 on Linux.

2.

Even this version sometimes has problems.  For example, if you launch
the wrapper around sbcl (a free Lisp interpreter/compiler) it mostly
works (entering 1 gives 1, entering (+ 2 3) gives 5...) until you get to
the debugger, for example by entering an undefined name.  Now, when the
debugger says "0: [ABORT] Exit debugger...", entering 0 should get you
back to the "*" prompt--and indeed does, unless you are using my
wrapper, in which case everything hangs, and the only solution is to
terminate everything with Ctrl-\ or such.

Any idea how to improve the script and solve this problem?


Toby


From nospam at riddergarn.dk  Sun Jan 28 04:54:28 2007
From: nospam at riddergarn.dk (Scripter47)
Date: Sun, 28 Jan 2007 10:54:28 +0100
Subject: Ip address
Message-ID: <45BC72D4.9030905@riddergarn.dk>

How do i get my ip address?

in cmd.exe i just type "ipconfig" then it prints:
      ...
      IP-address . . . . . . . . . . . . . . . . . : 192.168.1.10
      ...
how can i do that in python??



From robert.kern at gmail.com  Mon Jan 22 18:11:40 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 22 Jan 2007 17:11:40 -0600
Subject: arrow keys don't work
In-Reply-To: <1169506381.452422.179070@11g2000cwr.googlegroups.com>
References: <1169506381.452422.179070@11g2000cwr.googlegroups.com>
Message-ID: <ep3gbn$rjb$1@sea.gmane.org>

tac-tics wrote:
> I've noticed that in Python 2.5, the interactive prompt does not
> support intelligent use of arrow keys like 2.4 did (up/down for
> previous/next statement, left/right for moving the cursor). What
> exactly is the reason for this and is there an easier fix than
> downgradinig to 2.4? Thanks.

Your installation of 2.4 probably had the readline module installed while your
installation of 2.5 doesn't. What platform are you on?

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From Eugene.Antimirov at portaone.com  Mon Jan 22 05:24:16 2007
From: Eugene.Antimirov at portaone.com (Eugene Antimirov)
Date: Mon, 22 Jan 2007 12:24:16 +0200
Subject: newbie question
In-Reply-To: <618640.79082.qm@web7806.mail.in.yahoo.com>
References: <618640.79082.qm@web7806.mail.in.yahoo.com>
Message-ID: <45B490D0.8020809@portaone.com>

kavitha thankaian wrote:
> Hi,
>  
> i wrote a simple script (which follows) to insert a table in the 
> database.i could execute this query and get the result in python 
> shell.but when i open "my sql enterprise manager" i couldnt find the 
> table"animals".it would be so kind of you if someone could help me,,,
>  
>  
> import dbi
> import odbc
> conn=odbc.odbc("DSN=mydatabase;UID=xxx;PWD=yyy")
> cursor=conn.cursor()
> cursor.execute("Create table animals(parent char(50),child char(50))")
> cursor.execute("insert into animals values('lion','cub')")
> cursor.execute("insert into animals values('goat','lamb')")
> cursor.execute("select * from animals")
> print cursor.fetchall()
>  
>  
> Rgds
> Kavitha
>
> ------------------------------------------------------------------------
You've probably missed cursor.commit() ;)

-- 
Sincerely,
Eugene Antimirov
PortaOne, Inc., SIP Support Engineer
support at portaone.com

* For further Billing and Technical information:
=> Please visit our website http://www.portaone.com
=> Please visit our forum http://forum.portaone.com

* Meet us at Internet Telephony Conference & Expo
* Ft. Lauderdale, FL - January 24-26, 2007 - Booth 1322
* http://www.tmcnet.com/voip/conference/



From gonzlobo at gmail.com  Sun Jan 21 19:46:46 2007
From: gonzlobo at gmail.com (gonzlobo)
Date: Sun, 21 Jan 2007 17:46:46 -0700
Subject: Python Windows Editors
In-Reply-To: <79e7c$45b3facb$d443bb3a$7251@news.speedlinq.nl>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<79e7c$45b3facb$d443bb3a$7251@news.speedlinq.nl>
Message-ID: <be5994b50701211646v5c65524ah42cf6ef163d08105@mail.gmail.com>

I prefer PyScripter too, but would like to know if I can have
'indentation guides' enabled like PythonWin allows.

On 1/21/07, Stef Mientki <S.Mientki-nospam at mailbox.kun.nl> wrote:
> I tried 2 of them, and only was stable enough:  PyScripter
>   http://mmm-experts.com/Products.aspx?ProductID=4


From gandalf at designaproduct.biz  Tue Jan  2 14:16:12 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Tue, 02 Jan 2007 20:16:12 +0100
Subject: wsdl2py question
Message-ID: <459AAF7C.4000606@designaproduct.biz>

Hi All!

I just installed ZSI and tried to generate client code for a wsdl. Here 
is the exception I got:

Traceback (most recent call last):
  File "/usr/local/bin/wsdl2py", line 9, in ?
    wsdl2py()
  File 
"/usr/local/lib/python2.4/site-packages/ZSI/generate/commands.py", line 
222, in wsdl2py
    wsm.writeClient(fd)
  File 
"/usr/local/lib/python2.4/site-packages/ZSI/generate/wsdl2python.py", 
line 211, in writeClient
    sd.fromWsdl(service, **kw)
  File 
"/usr/local/lib/python2.4/site-packages/ZSI/generate/wsdl2python.py", 
line 294, in fromWsdl
    mw.setUp(soc, port, input=False)
  File 
"/usr/local/lib/python2.4/site-packages/ZSI/generate/wsdl2python.py", 
line 348, in setUp
    rpc,literal = soc.isRPC(), soc.isLiteral(input)
  File 
"/usr/local/lib/python2.4/site-packages/ZSI/generate/containers.py", 
line 441, in isLiteral
    return IsLiteral(msgrole)
  File 
"/usr/local/lib/python2.4/site-packages/ZSI/generate/containers.py", 
line 65, in IsLiteral
    raise ValueError, 'Missing soap:body binding.'
ValueError: Missing soap:body binding.

What does it mean? The wsdl is good for sure, I know other people using 
it from Java and .NET. I do not know too much about SOAP, this is why I 
wanted to generate the python code for my client, but now I'm stuck.

Thanks,

   Laszlo


From octabox at gmail.com  Tue Jan  9 09:58:15 2007
From: octabox at gmail.com (octabox at gmail.com)
Date: 9 Jan 2007 06:58:15 -0800
Subject: Internet Survey
Message-ID: <1168354695.334946.157400@51g2000cwl.googlegroups.com>

Hello all,

I represent Octabox, an Internet Start-up developing a wide-scale
platform for Internet services.  We are very interested to know your
thoughts on Internet productivity and how it might be improved, and to
that end we have set up a short survey at our website -
http://www.octabox.com/productivity_poll.php
We would very much appreciate if you would take a couple of minutes to
fill it up and influence our direction and empahsis.
 
Thanks in advance,
Octabox Development Team



From gagsl-py at yahoo.com.ar  Thu Jan 11 22:43:48 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 12 Jan 2007 00:43:48 -0300
Subject: Universal Feed Parser - How do I keep attributes?
In-Reply-To: <Xns98B565F1D9250maxericksongmailcom@80.91.229.5>
References: <1168450723.340213.235690@o58g2000hsb.googlegroups.com>
	<7.0.1.0.0.20070111012646.03f5bdb8@yahoo.com.ar>
	<Xns98B565F1D9250maxericksongmailcom@80.91.229.5>
Message-ID: <7.0.1.0.0.20070112003236.0599f8f0@yahoo.com.ar>

At Thursday 11/1/2007 12:01, Max Erickson wrote:

>Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
>
> > At Wednesday 10/1/2007 14:38, snewman18 at gmail.com wrote:
> >
> >> >>> d =
> >> >>> feedparser.parse('http://weather.yahooapis.com/forecastrss?p=
> > 94089')
> >> >>> d.feed.yweather_location
> >>u''
> >
> > You have to feed it the *contents* of the page, not its URL.
>
>The online documentation disagrees with you:
>
>http://feedparser.org/docs/introduction.html

You're right, sorry.
Anyway this parser can't cope with attributes in custom elements - 
they're just ignored. Only the contents are retained. For the 
yweather namespace it's useless then, since attributes are used to 
store all the information:

  <yweather:location city="Sunnyvale" region="CA" country="US" />
  <yweather:units temperature="F" distance="mi" pressure="in" speed="mph" />
  <yweather:wind chill="47" direction="350" speed="8" />
  <yweather:atmosphere humidity="38" visibility="1609" 
pressure="30.02" rising="2" />

You may try a different library. A generic XML approach like 
ElementTree http://effbot.org/zone/element-index.htm should be fine.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From carsten at uniqsys.com  Wed Jan  3 14:43:01 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 03 Jan 2007 14:43:01 -0500
Subject: Sorting on multiple values, some ascending, some descending
In-Reply-To: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
References: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
Message-ID: <1167853381.3391.29.camel@dot.uniqsys.com>

On Wed, 2007-01-03 at 10:48 -0800, dwelden wrote:
> I have successfully used the sort lambda construct described in
> http://mail.python.org/pipermail/python-list/2006-April/377443.html.
> However, how do I take it one step further such that some values can be
> sorted ascending and others descending? Easy enough if the sort values
> are numeric (just negate the value), but what about text?
> 
> Is the only option to define an external sorting function to loop
> through the list and perform the comparisons one value at a time?

If by "external sorting function" you mean a custom comparison function
to pass to sort as the cmp argument, then that's one option, but not the
only one.

If you know in advance which columns contain strings, you could write a
function that operates on strings and is strictly monotonically
decreasing, i.e. it behaves such that f(x) < f(y) if and only if x > y.
This function could then be used in the sort key for sorting on a string
column in descending order. The following function does the trick:

def antistring(x):
   return [256-ord(c) for c in x]+[257]

(Proof by vigorous handwaving.)

Lastly, if your array is small enough that you can tolerate the
performance hit of multiple passes, you could exploit the fact that
sort() is guaranteed to be stable in sufficiently recent releases of
CPython. Split your sort on n columns into n separate sorts on a single
column each, and use the 'reverse' parameter to specify whether to sort
forward or backwards.

Hope this helps,

Carsten.




From danielkleinad at gmail.com  Mon Jan  8 14:43:09 2007
From: danielkleinad at gmail.com (Daniel Klein)
Date: Mon, 08 Jan 2007 19:43:09 GMT
Subject: newbieee
References: <1168280831.323496.277020@38g2000cwa.googlegroups.com>
	<1168282763.275854.145430@v33g2000cwv.googlegroups.com>
Message-ID: <mb75q21qemeg46og7njhrgoiv82vhi2vui@4ax.com>

On 8 Jan 2007 10:59:23 -0800, "Thomas Nelson" <thn at mail.utexas.edu>
wrote:

>O'reilly has a book called Programming Python that covers much of the
>standard library and how to use it for complex tasks.  It may be out of
>date by now, though.  

Programming Python (by Mark Lutz) is now in it's 3rd edition and is
quite up to date.

Dan


From webraviteja at gmail.com  Tue Jan  2 10:36:01 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 2 Jan 2007 07:36:01 -0800
Subject: How do I add users using Python scripts on a Linux machine
In-Reply-To: <endrll$gjk$1@news1.carnet.hr>
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
Message-ID: <1167752161.755406.31470@v33g2000cwv.googlegroups.com>


Ivan Voras wrote:
> Ramdas wrote:
> > Well,
> >
> > I need to add users from a web interface for a web server, which runs
> > only Python. I need to add users, set quotas and in future even look at
> > managing ip tables to limit bandwidth.
> >
> > I know os.system(), but this has to be done through a form entry
> > through a web interface.
> >
> > Anyways thanks, do advise if there more pythonic solutions
>
> What you're looking for is actually a pretty complex thing. You *could*
> in theory manage /etc/passwd (and its "shadow" file) - you can find
> crypto primitives like MD5 and DES on the 'net, but note that you must
> run your script under the 'root' account in order to write (and even
> read!) the passwd database. The same goes for using os.system and the
> built-in OS utility. Be aware of security implications if you're running
> your web server under the root account.

How about invoking scripts with SUID root set?



From could.net at gmail.com  Fri Jan 26 06:02:33 2007
From: could.net at gmail.com (Frank Potter)
Date: 26 Jan 2007 03:02:33 -0800
Subject: how to remove c++ comments from a cpp file?
In-Reply-To: <mailman.3191.1169807705.32031.python-list@python.org>
References: <1169801197.941449.303000@v33g2000cwv.googlegroups.com>
	<mailman.3190.1169802638.32031.python-list@python.org>
	<1169805244.879280.235660@v45g2000cwv.googlegroups.com>
	<mailman.3191.1169807705.32031.python-list@python.org>
Message-ID: <1169809353.681105.183260@j27g2000cwj.googlegroups.com>

Thank you!

On Jan 26, 6:34 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Friday 26/1/2007 06:54, Frank Potter wrote:
>
> >[CODE]
> >import re
>
> >f=open("show_btchina.user.js","r").read()
> >f=unicode(f,"utf8")
>
> >r=re.compile(ur"//[^\r\n]+$", re.UNICODE|re.VERBOSE)
> >f_new=r.sub(ur"",f)
>
> >open("modified.js","w").write(f_new.encode("utf8"))
> >[/CODE]
>
> >And, the problem is, it seems that only the last comment is removed.
> >How can I remove all of the comments, please?Note that it's not as easy as simply deleting from // to end of line,
> because those characters might be inside a string literal. But if you
> can afford the risk, this is a simple way without re:
>
> f = open("show_btchina.user.js","r")
> modf = open("modified.js","w")
> for line in f:
>      uline=unicode(line,"utf8")
>      idx = uline.find("//")
>      if idx==0:
>          continue
>      elif idx>0:
>          uline = uline[:idx]+'\n'
>      modf.write(uline.encode("utf8"))
> modf.close()
> f.close()
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya!http://www.yahoo.com.ar/respuestas



From bdesth.quelquechose at free.quelquepart.fr  Tue Jan  2 07:54:23 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 02 Jan 2007 13:54:23 +0100
Subject: Difference between __init__ (again) and nothing ...
In-Reply-To: <c16d7$459a4712$d443bb3a$23982@news.speedlinq.nl>
References: <da749$459a380d$d443bb3a$16845@news.speedlinq.nl>
	<pan.2007.01.02.11.03.56.332520@gmx.net>
	<c16d7$459a4712$d443bb3a$23982@news.speedlinq.nl>
Message-ID: <459a4fe5$0$322$426a34cc@news.free.fr>

Stef Mientki a ?crit :
> Marc 'BlackJack' Rintsch wrote:
> 
>> In <da749$459a380d$d443bb3a$16845 at news.speedlinq.nl>, Stef Mientki wrote:
>>
>>> What's the difference between using __init__ and using nothing,
>>> as the examples below.
>>>
>>> class cpu:
>>>    PC = 4
>>
>>
>> This is a *class attribute*.  It's the same for all instances of `cpu`.
>>
>>> class cpu:
>>>    def __init__:
        def __init__(self):
>>>      self.PC = 4

By convention, ALL_UPPER names have a 'symbolic constant' semantic. 
Since Python is a very 'free' language (no attribute access restriction, 
no symbolic constants etc), it *strongly* relies on conventions.


>>
>> This is an *instance attribute* which is set in every instance of `cpu`.
>>
> thanks Marc,
> 
> Oh so obvious, why didn't I discovered that myself ;-)

Perhaps because it may not be that obvious at first sight ?-)

(that is, until you really understand Python's object model, which is 
really different from most mainstream OOPLs object models...)


From http  Sat Jan 27 13:26:41 2007
From: http (Paul Rubin)
Date: 27 Jan 2007 10:26:41 -0800
Subject: IP address of webserver
References: <1169918690.690636.42690@a75g2000cwd.googlegroups.com>
Message-ID: <7xlkjofhr2.fsf@ruckus.brouhaha.com>

"Johny" <python at hope.cz> writes:
> So I know  that www.google.com has 209.85.129.147  IP address.
> But how can I find it directly from Python script?

>>> import socket
>>> print socket.gethostbyname('www.google.com')
66.102.7.147
>>> 


From ptmcg at austin.rr.com  Wed Jan 24 00:40:21 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 23 Jan 2007 21:40:21 -0800
Subject: Simple Matrix class
In-Reply-To: <mailman.3051.1169604934.32031.python-list@python.org>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>
	<mailman.3049.1169600368.32031.python-list@python.org>
	<1169602411.917985.89840@l53g2000cwa.googlegroups.com>
	<mailman.3051.1169604934.32031.python-list@python.org>
Message-ID: <1169617221.481444.135820@v45g2000cwv.googlegroups.com>

> The points should be aligned on a log-log plot to be a power function.
> As Robert Kern stated before, this problem should be not worse than
> O(n**3) - how have you implemented it?
>
Sure enough, the complete equation is t = 5e-05exp(1.1n), or t = 5e-05
X 3**n.

As for the implementation, it's pretty much brute force.  Here is the
code itself - the cacheValue decorator memoizes the calculated inverse
for the given Matrix.

    @cacheValue
    def det(self):
        "Function to return the determinant of the matrix."
        if self.isSquare():
            if self.numRows() > 2:
                multiplier = 1
                firstRow = self[1]
                tmp = self._rows[1:]
                rangelentmp = range(len(tmp))
                col = 0
                detsum = 0
                for val in firstRow:
                    if val:
                        #~ tmp2 = Matrix([
RowVector(t[0:col]+t[col+1:]) for t in tmp ])
                        tmp2 = self.getCachedMatrix([
RowVector(t[0:col]+t[col+1:]) for t in tmp ])
                        detsum += ( multiplier * val * tmp2.det() )
                    multiplier = -multiplier
                    col += 1
                return detsum
            if self.numRows() == 2:
                return self[1][1]*self[2][2]-self[1][2]*self[2][1]
            if self.numRows() == 1:
                return self[1][1]
            if self.numRows() == 0:
                return 0
        else:
            raise MatrixException("can only compute det for square
matrices")

    def cofactor(self,i,j):
        i-=1
        j-=1
        #~ tmp = Matrix([ RowVector(r[:i]+r[i+1:]) for r in
(self._rows[:j]+self._rows[j+1:]) ])
        tmp = self.getCachedMatrix([ RowVector(r[:i]+r[i+1:]) for r in
(self._rows[:j]+self._rows[j+1:]) ])
        if (i+j)%2:
            return -tmp.det()
        else:
            return tmp.det()
        #~ return (-1) ** (i+j) * tmp.det()

    @cacheValue
    def inverse(self):
        if self.isSquare():
            if self.det() != 0:
                ret = Matrix( [ RowVector( [ self.cofactor(i,j) for j
in self.colrange() ] )
                                 for i in self.rowrange() ] )
                ret *= (1.0/self.det())
                return ret
            else:
                raise MatrixException("cannot compute inverse for
singular matrices")
        else:
            raise MatrixException("can only compute inverse for square
matrices")



From sjmachin at lexicon.net  Mon Jan 29 18:29:12 2007
From: sjmachin at lexicon.net (John Machin)
Date: 29 Jan 2007 15:29:12 -0800
Subject: Conversion of string to integer
In-Reply-To: <1170100085.505577.211470@v33g2000cwv.googlegroups.com>
References: <1170078933.180025.229830@k78g2000cwa.googlegroups.com>
	<1170100085.505577.211470@v33g2000cwv.googlegroups.com>
Message-ID: <1170113352.231928.151960@p10g2000cwp.googlegroups.com>



On Jan 30, 6:48 am, "witte... at hotmail.com" <martin.wi... at gmail.com> 
wrote:
> On Jan 29, 2:55 pm, "jupiter" <anil.jupit... at gmail.com> wrote:
>
>
>
> > Hi guys,
>
> > I have a problem. I have a list which contains strings and numeric.
> > What I want is to compare them in loop, ignore string and create
> > another list of numeric values.
>
> > I tried int() and decimal() but without success.
>
> > eq of problem is
>
> > #hs=string.split(hs)
> > hs =["popopopopop","254.25","pojdjdkjdhhjdccc","25452.25"]
>
> > j=0
> >     for o in range(len(hs)):
> >         print hs[o],o
> >         p=Decimal(hs[o])
> >         if p > 200: j+=j
> >         print "-"*5,j
> >     print "*"*25
>
> > I could be the best way to solve this ......?
>
> > @nilfunction isinstance can help you to determine the type/class of an
> object:
>
> py>hs =["popopopopop","254.25","pojdjdkjdhhjdccc","25452.25"]
> py>
> py>for i in hs:
> py>    if isinstance(i, str):
> py>        print str(i)
> py>    elif isinstance(i, float):
> py>        print float(i)
> py>    elif isinstance(i, int):
> py>        print int(i)
> py>    else:
> py>        print 'dunno type of this element: %s' % str(i)
> popopopopop
> 254.25
> pojdjdkjdhhjdccc
> 25452.25

Call me crazy, but I can't understand what the above code is meant to 
demonstrate.

(1) All of the elements in "hs" are *known* to be of type str. The 
above code never reaches the first elif. The OP's problem appears to 
be to distinguish which elements can be *converted* to a numeric type.

(2) if isinstance(i, some_type) is true, then (usually) some_type(i) 
does exactly nothing that is useful

Awaiting enlightenment ...

John



From jgodoy at gmail.com  Sat Jan  6 10:36:14 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sat, 06 Jan 2007 13:36:14 -0200
Subject: Python re expr from Perl to Python
References: <GzOnh.112$a81.91@nntpserver.swip.net>
Message-ID: <877iw0dv69.fsf@gmail.com>

"Michael M." <michael at mustun.ch> writes:

> In Perl, it was:
>
>
>   ## Example: "Abc | def | ghi | jkl"
>   ##       -> "Abc ghi jkl"
>   ## Take only the text betewwn the 2nd pipe (=cut the text in the 1st pipe).
>   $na =~ s/\ \|(.*?)\ \|(.*?)\ \|/$2/g;
>
>   ## -- remove [ and ] in text
>   $na =~ s/\[//g;
>   $na =~ s/\]//g;
>   # print "DEB: \"$na\"\n";
>
>
> # input string
> na="Abc | def | ghi | jkl [gugu]"
> # output
> na="Abc ghi jkl gugu"
>
>
> How is it done in Python?

The simplest form:

>>> na="Abc | def | ghi | jkl [gugu]"
>>> na_out = na.replace('def', '').replace(' | ', ' ').replace('  ', ' ').replace('[', '').replace(']', '').strip()
>>> na_out
'Abc ghi jkl gugu'
>>> 


Another form:

>>> na_out = ' '.join(na.split(' | ')).replace('[', '').replace(']', '').replace(' def', '')
>>> na_out
'Abc ghi jkl gugu'
>>> 


There is the regular expression approach as well as several other
alternatives.  I could list other (simpler, more advanced, etc.) alternatives,
but you can also play with Python by yourself.  If you have a more concrete
specification, send it to the group.



-- 
Jorge Godoy      <jgodoy at gmail.com>


From steve at holdenweb.com  Tue Jan 30 00:14:33 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 30 Jan 2007 05:14:33 +0000
Subject: The reliability of python threads
In-Reply-To: <45B90118.5010408@mvista.com>
References: <mailman.3092.1169657938.32031.python-list@python.org>	<ep8gue$3tu$1@panix3.panix.com>
	<45B90118.5010408@mvista.com>
Message-ID: <epmk7l$7k4$2@sea.gmane.org>

Carl J. Van Arsdall wrote:
> Aahz wrote:
>> [snip]
>>
>> My response is that you're asking the wrong questions here.  Our database
>> server locked up hard Sunday morning, and we still have no idea why (the
>> machine itself, not just the database app).  I think it's more important
>> to focus on whether you have done all that is reasonable to make your
>> application reliable -- and then put your efforts into making your app
>> recoverable.
>>   
> Well, I assume that I have done all I can to make it reliable.  This 
> list is usually my last resort, or a place where I come hoping to find 
> ideas that aren't coming to me naturally.  The only other thing I 
> thought to come up with was that there might be network errors.  But 
> i've gone back and forth on that, because TCP should handle that for me 
> and I shouldn't have to deal with it directly in pyro, although I've 
> added (and continue to add) checks in places that appear appropriate 
> (and in some cases, checks because I prefer to be paranoid about errors).
> 
> 
>> I'm particularly making this comment in the context of your later point
>> about the bug showing up only every three or four months.
>>
>> Side note: without knowing what error messages you're getting, there's
>> not much anybody can say about your programs or the reliability of
>> threads for your application.
>>   
> Right, I wasn't coming here to get someone to debug my app, I'm just 
> looking for ideas.  I constantly am trying to find new ways to improve 
> my software and new ways to reduce bugs, and when i get really stuck, 
> new ways to track bugs down.  The exception won't mean much, but I can 
> say that the error appears to me as bad data.  I do checks prior to 
> performing actions on any data, if the data doesn't look like what it 
> should look like, then the system flags an exception.
> 
> The problem I'm having is determining how the data went bad.  In 
> tracking down the problem a couple guys mentioned that problems like 
> that usually are a race condition.  From here I examined my code, 
> checked out all the locking stuff, made sure it was good, and wasn't 
> able to find anything.  Being that there's one lock and the critical 
> sections are well defined, I'm having difficulty.  One idea I have to 
> try and get a better understanding might be to check data before its 
> stored.  Again, I still don't know how it would get messed up nor can I 
> reproduce the error on my own. 
> 
> Do any of you think that would be a good practice for trying to track 
> this down? (Check the data after reading it, check the data before 
> saving it)
> 
Are you using memory with built-in error detection and correction?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From leonel.gayard at gmail.com  Wed Jan  3 12:48:08 2007
From: leonel.gayard at gmail.com (leonel.gayard at gmail.com)
Date: 3 Jan 2007 09:48:08 -0800
Subject: A python library to convert RTF into PDF ?
Message-ID: <1167846487.943390.192130@a3g2000cwd.googlegroups.com>

Hi,

Does anyone know a good python library to convert a RTF file into PDF ?

This should be done automaticaly: I have a web page that takes some
values and inserts them into a RTF template, resulting in an RTF file.
However, I cannot send the output back to the user in RTF, it must be
sent in PDF instead, so I need to convert the result.

So, what library can I use to convert from RTF to PDF ? GPL / BSD
Libraries are welcome.

Thanks
Leonel



From mhellwig at xs4all.nl  Thu Jan 18 10:15:34 2007
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Thu, 18 Jan 2007 16:15:34 +0100
Subject: Would a Dutch speaker please check this wiki page please?
In-Reply-To: <a9dd0$45aea341$d443bb3a$10472@news.speedlinq.nl>
References: <mailman.2852.1169070591.32031.python-list@python.org>
	<a9dd0$45aea341$d443bb3a$10472@news.speedlinq.nl>
Message-ID: <45af8edf$0$336$e4fe514c@news.xs4all.nl>

Stef Mientki wrote:
> skip at pobox.com wrote:
>> Got a note about a new page on the Python Wiki:
>>
>>>>>>> "Wade" == Wade McDaniel <wmcdaniel at wolfgangsvault.com> writes:
>>
>>     http://wiki.python.org/moin/Selcuk_Altun
>>
>> I suspect it's junk since it doesn't seem to mention Python and the 
>> website
>> it mentions doesn't seem to exist.  Still, just in case...
> The only (incorrect) Dutch sentence on the whole site is:
>   "Welkom op me site www.keriwar.nl",
> which should have been
>   "Welkom op mijn site www.keriwar.nl"
Well actually in the next sentence "De site is online als je vragen hebt 
lees eerst te F.A.Q." is incorrect too, "te F.A.Q." is grammatical and 
logical incorrect, should be "de F.A.Q.".
Indeed it's not Afrikaans but just incorrect use of Dutch and not 
related to python.

-- 
mph


From bruno.desthuilliers at websiteburo.com  Thu Jan 11 11:59:22 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Thu, 11 Jan 2007 17:59:22 +0100
Subject: globals accros modules
In-Reply-To: <3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>
	<mailman.2556.1168492539.32031.python-list@python.org>
	<3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>
Message-ID: <45a66cea$0$289$426a34cc@news.free.fr>

stef a ?crit :
> 
>>
>> Change a=1 to amodule.a=1
>> If you find yourself doing tricks with the module globals, think about 
>> redesigning your application.
>>
> Of course I completely agree with you.
> 
> But ...
> if you're moving from MatLab to Python,
> and want to show your collegaes,
> with how little effort they can reuse all their existing MatLab routines 
> in Python,
> then the global issue is a real pain !!
> 
> You can explain your collegaes, that
> - the startindex of arrays changes from 1 to 0
> - slices are upto, instead of including the final border
> - indention is th? key
> And tell them about all beautiful things in Python,
> but tell them that they are going to loose all their globals ???

It's a feature. Globals are definitively a BadThing(tm).

> cheers,
> Stef Mientki
> 


From tony at PageDNA.com  Mon Jan  1 18:01:00 2007
From: tony at PageDNA.com (Tony Lownds)
Date: Mon, 1 Jan 2007 15:01:00 -0800
Subject: PEP 3107 Function Annotations for review and comment
In-Reply-To: <1167688435.399538.318990@48g2000cwx.googlegroups.com>
References: <D6502383-5A30-4E1F-8B91-C2C4D23B3E13@PageDNA.com>
	<mailman.2139.1167437380.32031.python-list@python.org>
	<1167492896.292605.15040@48g2000cwx.googlegroups.com>
	<mailman.2160.1167505231.32031.python-list@python.org>
	<1167580455.349588.234610@v33g2000cwv.googlegroups.com>
	<mailman.2177.1167582211.32031.python-list@python.org>
	<1167688435.399538.318990@48g2000cwx.googlegroups.com>
Message-ID: <0F352C8B-A752-4B9E-A30E-906FB0440DF3@PageDNA.com>


On Jan 1, 2007, at 1:53 PM, Paul Boddie wrote:
> It's true that for the area to be explored, which I know you've been
> doing, one first has to introduce an annotation scheme that can  
> then be
> used by things like pylint. I'd like to see assertions about the
> usefulness of such annotations verified by modified versions of tools
> like pylint before changes to the language are made, mostly because
> such assertions seem to be more conjecture than prediction. In other
> words, the changes should be advocated, implemented and tested in a
> closed system before being introduced as wider language changes,
> especially given that Python has already seen a number of speculative
> changes which were made in anticipation of certain needs that
> subsequently appeared to be less significant than first thought.
>

I can understand reluctance to change the language, keep in mind this is
Python-3000 not Python 2.x, and even accepted features do get removed
sometimes, like the access statement. I'm sure that feature qualifies  
as a
speculative change -- I'd be curious to what other ones you were  
thinking
about.

At least one such modified tool exists: pydoc. That will display  
annotations.
Does that count?

It's not easy to develop syntax in a closed system that ISN'T python  
itself,
especially when part of the point is to consolidate the ways in which  
function
arguments and return types get annotated, and to do so as readably as  
possible.


> Another thing I find worrying about function annotations is the
> ambivalence around their purpose: the feature is supposedly great for
> static typing, but when confronted over the consequences of having
> developers spray type declarations everywhere, we're told that they
> aren't really meant for such things and that type declarations are  
> only
> an example of what annotations could do. Here, the sales department  
> and
> the engineering department really have to get together and get their
> story straight.

Can you point out any specific text from the PEP you derived this from?
Then "sales" can work from something specific :)

Thanks
-Tony




From pink at odahoda.de  Mon Jan 22 11:18:38 2007
From: pink at odahoda.de (Benjamin Niemann)
Date: Mon, 22 Jan 2007 17:18:38 +0100
Subject: Is there a better way to implement this:
References: <mailman.2987.1169480867.32031.python-list@python.org>
Message-ID: <ep2o5c$1aa$1@online.de>

Michael Yanowitz wrote:

> Hello:
> 
>    I wrote the code below (much irrelevant code removed).
> This doesn't quite work. What I wanted it to do was
>  a) Execute function ftimed, which takes a function and a timeout
>     in seconds.
>  b) This will also execute function abort() as a thread.
>     This function just runs for the specified
>     number of seconds and returns.
>     However, before it returns, throws an exception.
> c)  If test() is still running when abort() is
>     finished, ftimed() should catch the exception and
>     return.
> 
> It is catching the exception, however it continues running the function.
> Why does it continue and not return?

The exception is raised in the thread that executes the abort() function.
The exception does not get caught and terminates this thread. The other
(main) thread is unaffected - exceptions are local to a thread and there is
currently no (portable) way to raise an exception in another thread.

> What am I missing, or is there a better way to
> implement this (having ftimed() return when the
> abort-timer time is exceeded?

You may use the signal.alarm() function, if you are on a UNIXoid system and
you have only a signle time-out at a time (e.g. not nested).

> import time, thread, sys
> 
> thread_finished = "MAX RUN TIME EXCEEDED!"
> 
> def abort (seconds):
>      start_time = time.time()
>      while ((time.time() - start_time) < seconds):
>         time.sleep(0.01)

any reason for not using time.sleep(seconds) here?

>      print "script run time exceeded max_run_time of", seconds, "seconds."
>      raise thread_finished
>      return
> 
> 
> def test():
>     i = 0
>     while (True):
>        time.sleep(1)
>        print "HELLO", i
>        i+=1
> 
> 
> def ftimed (func, seconds):
>     thread.start_new_thread (abort, (seconds,))
> 
>     try:
>         func()
>     except thread_finished:
>         print  "Timeout"
>         return
> 
> ftimed (test, 30)
> print "Script finished"

-- 
Benjamin Niemann
Email: pink at odahoda dot de
WWW: http://pink.odahoda.de/


From kavithapython at yahoo.co.in  Mon Jan 22 03:31:37 2007
From: kavithapython at yahoo.co.in (kavitha thankaian)
Date: Mon, 22 Jan 2007 08:31:37 +0000 (GMT)
Subject: newbie question
Message-ID: <618640.79082.qm@web7806.mail.in.yahoo.com>

Hi,
   
  i wrote a simple script (which follows) to insert a table in the database.i could execute this query and get the result in python shell.but when i open "my sql enterprise manager" i couldnt find the table"animals".it would be so kind of you if someone could help me,,,
   
   
  import dbi
import odbc
conn=odbc.odbc("DSN=mydatabase;UID=xxx;PWD=yyy")
cursor=conn.cursor()
cursor.execute("Create table animals(parent char(50),child char(50))")
cursor.execute("insert into animals values('lion','cub')")
cursor.execute("insert into animals values('goat','lamb')")
cursor.execute("select * from animals")
print cursor.fetchall()
   
   
  Rgds
  Kavitha

 				
---------------------------------
 Here?s a new way to find what you're looking for - Yahoo! Answers 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070122/b7196d39/attachment.html>

From arkanes at gmail.com  Wed Jan 24 13:57:11 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 24 Jan 2007 12:57:11 -0600
Subject: Type casting a base class to a derived one?
In-Reply-To: <1169664145.4910.22.camel@portable-evil>
References: <mailman.2571.1168518354.32031.python-list@python.org>
	<slrneqcgve.1n0.horpner@FIAD06.norwich.edu>
	<4866bea60701110641n5eb4cc57uf5967aebcfd7790d@mail.gmail.com>
	<1169664145.4910.22.camel@portable-evil>
Message-ID: <4866bea60701241057t13776d34ya516c2c24e7119bb@mail.gmail.com>

On 1/24/07, Cliff Wells <cliff at develix.com> wrote:
> On Thu, 2007-01-11 at 08:41 -0600, Chris Mellon wrote:
> > On 11 Jan 2007 15:01:48 +0100, Neil Cerutti <horpner at yahoo.com> wrote:
> > > On 2007-01-11, Frederic Rentsch <anthra.norell at vtxmail.ch> wrote:
> > > > If I derive a class from another one because I need a few extra
> > > > features, is there a way to promote the base class to the
> > > > derived one without having to make copies of all attributes?
> > > >
> > > > class Derived (Base):
> > > >    def __init__ (self, base_object):
> > > >       # ( copy all attributes )
> > > >       ...
> > > >
> > > > This looks expensive. Moreover __init__ () may not be available
> > > > if it needs to to something else.
> > > >
> > > > Thanks for suggestions
> > >
> > > How does it make sense to cast a base to a derived in your
> > > application?
> > >
> >
> > I can't figure out any circumstance when you'd need to do this in
> > Python. Upcasting like this is something you do in statically typed
> > languages. I suspect that the OP doesn't really believe dynamic
> > casting works and doesn't want to pass a derived class for some
> > reason.
>
> I actually encountered a need to do so (and I recalled seeing this
> thread which is why I'm replying to it now).  I've got a dispatch system
> based on object type.  Objects come from an external source (an ORM), so
> I can't efficiently set their types at the point of creation (nor would
> I necessarily want to).  However, in different contexts, I may want them
> to be dispatched differently (i.e as if they are a different type).  In
> fact, often the same object will be handled differently within two or
> more contexts during the lifetime of that object.  It would be nice to
> be able to cast them to a derived class (which actually adds no new
> methods or attributes, just changes the type) at that exact moment to
> cause the dispatcher to handle them differently.
>

In Python, you can do this simply by re-assigning the __class__. I'm
not convinced that your type system makes sense, here though. Any
reasonable ORM should be able to persist and reload an object without
losing the type information. Perhaps it's just a blind spot in the way
I think about types. Assuming that the limitations of your ORM are
external and out of your control, I would still ensure that whatever
generic objects are being loaded from the ORM are converted into
"real" objects of the correct type as soon as possible. For example,
if you're persisting a file, you might just save the filename, and
your ORM might return a string of the filename. I would want to
convert that back into a file object ASAP, rather than writing all my
code to accept either a FLO or a string and converting then.

If you know what to upcast something to, then you know what type it
is. If you know what type it is, then (in Python) you can simply
assume it is of that type.

What you're describing is a disjoint between your actual type system
(that is, the one you have in code) and your theoretical type system
(the one that you model your code around). To me, this is a huge red
warning flag.

> Now, that being said, it's quite possible the system *could* have been
> designed to not dispatch based on type, but quite frankly it works quite
> elegantly and naturally for everything but this one case.
>

Dispatch on type is perfectly natural. I'm not arguing against that,
I'm arguing against the idea that it makes sense, in Python, to
upcast.

> Just pointing out that just because we don't see a need for something
> doesn't invalidate it.  It just makes it something we had thought of ;-)
>

I agree, but without a use case it's hard to understand the limits and
needs of a requirement. So if you can't think of a need for a feature,
it becomes difficult to understand how you might implement that
feature.


From luca.masini at i.eee.org  Wed Jan 24 09:00:02 2007
From: luca.masini at i.eee.org (Luca Masini)
Date: Wed, 24 Jan 2007 15:00:02 +0100
Subject: AFP library for Python
Message-ID: <ep7pde$t2b$1@aioe.org>

Hi,

googled for a Python library that support AFP but
found only a PERL module:
   http://search.cpan.org/src/AUTRIJUS/Parse-AFP-0.24/

Maybe someone know of a similar library for Python ?

PS: in alternative if there are some interested people
     we can implement it...
     :-))

Thanks


Luca.


From cliff at develix.com  Wed Jan 24 13:42:24 2007
From: cliff at develix.com (Cliff Wells)
Date: Wed, 24 Jan 2007 10:42:24 -0800
Subject: Type casting a base class to a derived one?
In-Reply-To: <4866bea60701110641n5eb4cc57uf5967aebcfd7790d@mail.gmail.com>
References: <mailman.2571.1168518354.32031.python-list@python.org>
	<slrneqcgve.1n0.horpner@FIAD06.norwich.edu>
	<4866bea60701110641n5eb4cc57uf5967aebcfd7790d@mail.gmail.com>
Message-ID: <1169664145.4910.22.camel@portable-evil>

On Thu, 2007-01-11 at 08:41 -0600, Chris Mellon wrote:
> On 11 Jan 2007 15:01:48 +0100, Neil Cerutti <horpner at yahoo.com> wrote:
> > On 2007-01-11, Frederic Rentsch <anthra.norell at vtxmail.ch> wrote:
> > > If I derive a class from another one because I need a few extra
> > > features, is there a way to promote the base class to the
> > > derived one without having to make copies of all attributes?
> > >
> > > class Derived (Base):
> > >    def __init__ (self, base_object):
> > >       # ( copy all attributes )
> > >       ...
> > >
> > > This looks expensive. Moreover __init__ () may not be available
> > > if it needs to to something else.
> > >
> > > Thanks for suggestions
> >
> > How does it make sense to cast a base to a derived in your
> > application?
> >
> 
> I can't figure out any circumstance when you'd need to do this in
> Python. Upcasting like this is something you do in statically typed
> languages. I suspect that the OP doesn't really believe dynamic
> casting works and doesn't want to pass a derived class for some
> reason.

I actually encountered a need to do so (and I recalled seeing this
thread which is why I'm replying to it now).  I've got a dispatch system
based on object type.  Objects come from an external source (an ORM), so
I can't efficiently set their types at the point of creation (nor would
I necessarily want to).  However, in different contexts, I may want them
to be dispatched differently (i.e as if they are a different type).  In
fact, often the same object will be handled differently within two or
more contexts during the lifetime of that object.  It would be nice to
be able to cast them to a derived class (which actually adds no new
methods or attributes, just changes the type) at that exact moment to
cause the dispatcher to handle them differently.

Now, that being said, it's quite possible the system *could* have been
designed to not dispatch based on type, but quite frankly it works quite
elegantly and naturally for everything but this one case.

Just pointing out that just because we don't see a need for something
doesn't invalidate it.  It just makes it something we had thought of ;-)
  

Regards,
Cliff





From dtgeadamo at yahoo.com  Fri Jan 12 06:00:07 2007
From: dtgeadamo at yahoo.com (Viewer T.)
Date: 12 Jan 2007 03:00:07 -0800
Subject: How to run external program?
In-Reply-To: <1168594577.397453.320380@a75g2000cwd.googlegroups.com>
References: <1168594577.397453.320380@a75g2000cwd.googlegroups.com>
Message-ID: <1168599607.353569.295520@s34g2000cwa.googlegroups.com>


Lad wrote:
> How  can I run external program from Python?
> I use Python with XP
> Thank you for help

A possible way to do this is the following:
Let's say we want to run a program called program.exe from the path
C/Program/Program.exe. We would first need to import the os module and
type the following:

import os                                        #import the os module
path = 'C:/Program/Program.exe'      #give the pathname of the external
program as a string
os.system(path)                              #execute the program from
python using the os module

There are many other ways, but this should work for short pathnames
without spaces.



From eurleif at ecritters.biz  Tue Jan  9 04:29:55 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Tue, 09 Jan 2007 04:29:55 -0500
Subject: Colons, indentation and reformatting.
In-Reply-To: <1168323145.393149.299540@v33g2000cwv.googlegroups.com>
References: <1168323145.393149.299540@v33g2000cwv.googlegroups.com>
Message-ID: <45a36074$0$15146$4d3efbfe@news.sover.net>

Paddy wrote:
> Thinking about it a little, it seems that a colon followed by
> non-indented code that has just been pasted in could also be used by a
> Python-aware editor as a flag to re-indent the pasted code.


How would it reindent this code?

if foo:
print "Foo!"
if bar:
print "Bar!"

Like this?

if foo:
     print "Foo!"
if bar:
     print "Bar!"

Or like this?

if foo:
     print "Foo!"
     if bar:
         print "Bar!"


From stumblecrab at gmail.com  Fri Jan 26 11:28:04 2007
From: stumblecrab at gmail.com (stumblecrab at gmail.com)
Date: 26 Jan 2007 08:28:04 -0800
Subject: Activepython gcc and swig
Message-ID: <1169828884.147638.254130@v33g2000cwv.googlegroups.com>

Hello,

I've looked at the swig example in the back of "programming python"
(Lutz).  Using gcc to compile a swig wrapper I'm getting lots of
errors.  Instead of using the cygwin python, I'm trying to point swig
to my activepython installation. I'm doing this because my modules are
all win32 installed, and not cygwin installed.  Can anyone help me?

I'm pointing to C:/python24/include and C:/python24/Libs.


************* Here are the errors *******************

$ gcc -c example.c example_wrap.c -Ic:/python24/include
-Ic:/python24/Lib
In file included from c:/python24/include/Python.h:82,
                 from example_wrap.c:112:
c:/python24/include/intobject.h:41: error: parse error before
"PyInt_AsUnsignedL
ongLongMask"
c:/python24/include/intobject.h:41: warning: data definition has no
type or stor
age class
In file included from c:/python24/include/Python.h:84,
                 from example_wrap.c:112:
c:/python24/include/longobject.h:37: warning: parameter names (without
types) in
 function declaration
c:/python24/include/longobject.h:39: error: parse error before
"PyLong_AsLongLon
g"
c:/python24/include/longobject.h:39: warning: data definition has no
type or sto
rage class
c:/python24/include/longobject.h:40: error: parse error before
"PyLong_AsUnsigne
dLongLong"
c:/python24/include/longobject.h:40: warning: data definition has no
type or sto
rage class
c:/python24/include/longobject.h:41: error: parse error before
"PyLong_AsUnsigne
dLongLongMask"
c:/python24/include/longobject.h:41: warning: data definition has no
type or sto
rage class
**************************************************************************************************



From steve at holdenweb.com  Tue Jan 30 00:22:45 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 30 Jan 2007 05:22:45 +0000
Subject: pdf to text
In-Reply-To: <epkv25$44l$1@solaris.cc.vt.edu>
References: <epb638$gd4$1@solaris.cc.vt.edu>	<86714$45b9254c$54d1d767$3741@news.chello.no>	<epb9s7$nnk$1@solaris.cc.vt.edu>	<uwt3azphd.fsf@CoCreate.com>
	<epkv25$44l$1@solaris.cc.vt.edu>
Message-ID: <epmkn1$b7n$1@sea.gmane.org>

tubby wrote:
> Dieter Deyke wrote:
>>>     sout = os.popen('pdftotext "%s" - ' %f)
> 
>> Your program above should read:
>>
>>    sout = os.popen('pdftotext "%s" - ' % (f,))
> 
> What is the significance of doing it this way?

It's actually just nit-picking - as long as you know f is never going to 
  be a tuple then it's perfectly acceptable to use a single value as the 
right-hand operand.

Of course, if f ever *is* a tuple (with more than one element) then you 
will get an error:

  >>> for f in ['string',
                ('one-element tuple', ),
                ("two-element", "tuple")]:
  ...   print 'Nit: pdftotext "%s" - ' % (f,)
  ...   print 'You: pdftotext "%s" - ' %f
  ...
Nit: pdftotext "string" -
You: pdftotext "string" -
Nit: pdftotext "('one-element tuple',)" -
You: pdftotext "one-element tuple" -
Nit: pdftotext "('two-element', 'tuple')" -
Traceback (most recent call last):
   File "<stdin>", line 3, in <module>
TypeError: not all arguments converted during string formatting
  >>>

So there is potentially some value to it. But we often don't bother.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From wanjunfeng at gmail.com  Wed Jan 17 04:33:42 2007
From: wanjunfeng at gmail.com (Kevin Wan)
Date: 17 Jan 2007 01:33:42 -0800
Subject: I wrote a C++ code generator in Python,
	would anyone please help me to review the code? :)
In-Reply-To: <1168991250.445208.159020@v45g2000cwv.googlegroups.com>
References: <1168930067.970099.164620@s34g2000cwa.googlegroups.com>
	<1168991250.445208.159020@v45g2000cwv.googlegroups.com>
Message-ID: <1169026422.364202.115170@v45g2000cwv.googlegroups.com>

I've added a document for fgen.

Please check it.

Thanks,
Kevin
mensanator at aol.com wrote:
> Kevin Wan wrote:
> > fgen is a free command line tool that facilitates cross platform c++
> > development, including header generation, cpp file generation, makefile
> > generation, unit test framework generation, etc.
> >
> > http://sf.net/projects/fgen
> >
> > I'm not very familiar with Python. Any feedback are appreciated!
>
> No documentation?
>
> Am I supposed to reverse engineer all the source files to figure out
> how I'm
> supposed to use it?
> 
> > Or
> > anyone like to develop it with me?
> > 
> > Thanks.



From t.googlegroups at mohme.org  Wed Jan 31 10:01:51 2007
From: t.googlegroups at mohme.org (Thomas)
Date: 31 Jan 2007 07:01:51 -0800
Subject: Can't install Turbogears (with pysqlite) on Windows
In-Reply-To: <1170231106.741090.249460@j27g2000cwj.googlegroups.com>
References: <1170231106.741090.249460@j27g2000cwj.googlegroups.com>
Message-ID: <1170255711.117403.4990@v33g2000cwv.googlegroups.com>

The solution can be found here:
http://groups.google.com/group/turbogears/browse_thread/thread/2dc72464a48fde94



From paddy3118 at netscape.net  Mon Jan  1 22:00:07 2007
From: paddy3118 at netscape.net (Paddy)
Date: 1 Jan 2007 19:00:07 -0800
Subject: OO question
In-Reply-To: <pan.2007.01.01.12.16.19.706801@REMOVE.THIS.cybersource.com.au>
References: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
	<pan.2007.01.01.05.37.52.466540@REMOVE.THIS.cybersource.com.au>
	<1167631258.804660.154490@n51g2000cwc.googlegroups.com>
	<pan.2007.01.01.12.16.19.706801@REMOVE.THIS.cybersource.com.au>
Message-ID: <1167706807.899031.87920@a3g2000cwd.googlegroups.com>


Steven D'Aprano wrote:
> On Sun, 31 Dec 2006 22:00:58 -0800, Paddy wrote:
>
> >>     def save(self, filename):
> >>         self.currentfile = file(filename, "w")
> >>         for address in self.addresses:
> >>             self.save_one_address(address.export())
> >>         self.currentfile.close()
> >>         self.currentfile = None
> >
> > Small addition.
> > If a class does a save then it should also do the load of the data too.
>
> What, you've never heard of a write-only file?
> 

Ahh /dev/null ;-)

- Paddy.



From larry.bates at websafe.com  Mon Jan 22 17:49:06 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 22 Jan 2007 16:49:06 -0600
Subject: module check
In-Reply-To: <1169477715.178874.223290@51g2000cwl.googlegroups.com>
References: <1169477715.178874.223290@51g2000cwl.googlegroups.com>
Message-ID: <Z--dnRdvecHQoijYnZ2dnUVZ_vTinZ2d@comcast.com>

Victor Polukcht wrote:
> Can anybody suggest a correct way of checking in python module exists
> and correctly installed from python program.
> 

Not sure I understand the question, but I'll try:

try: import yourmodule
except:
    print "Can't import yourmodule"


-Larry


From sean at datafly.net  Wed Jan 24 19:34:19 2007
From: sean at datafly.net (Sean Schertell)
Date: Thu, 25 Jan 2007 09:34:19 +0900
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <e75321bd0701241533ie528b15p42a0a75bd0666c2d@mail.gmail.com>
References: <ep60jp$63v$1@aioe.org> <45b72b0d$0$5107$ba4acef3@news.orange.fr>
	<e75321bd0701241533ie528b15p42a0a75bd0666c2d@mail.gmail.com>
Message-ID: <49E1CCC0-D22F-4411-B192-429E42045578@datafly.net>

Not to totally hijack the thread -- but since you're all talking  
about best GUI frameworks. Any thoughts on the best looking framework  
for OS X only? Is there any way to write little Python apps that will  
launch in OS X using OS X widgets?

Thanks,
Sean



On Jan 25, 2007, at 8:33 AM, dimitri pater wrote:

>
>
> On 1/24/07, Laurent Rahuel <lrahuel.notgood at voila.fr> wrote: Hi,
>
> I known this can be impossible but what about an "HTML" GUI ?
> Yep, I think you should consider a HTML GUI. I have just finished a  
> project using CherryPy running on localhost. The big advantage is  
> that the app runs on Linux, Mac and Win using a browser without any  
> problem. You can use css and js to polish the user interface and  
> usability of your application.
>
> regards,
> Dimitri
> ---
> You can't have everything. Where would you put it? -- Steven Wright
> ---
> please visit www.serpia.org
> -- 
> http://mail.python.org/mailman/listinfo/python-list

::::  DataFly.Net  ::::
Complete Web Services
http://www.datafly.net



From grante at visi.com  Fri Jan  5 12:41:55 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 05 Jan 2007 17:41:55 -0000
Subject: Dividing integers...Convert to float first?
References: <1168017342.255981.134400@11g2000cwr.googlegroups.com>
	<459E8B5C.6020804@gmx.net>
	<mailman.2336.1168018559.32031.python-list@python.org>
Message-ID: <12pt3f3kc1jmcf8@corp.supernews.com>

On 2007-01-05, Jonathan Smith <smithj at rpath.com> wrote:

> >>> from __future__ import division
> >>> 1/2
> 0.5

   $ python
   Python 2.4.3 (#1, Dec 10 2006, 22:09:09) 
   [GCC 3.4.6 (Gentoo 3.4.6-r1, ssp-3.4.5-1.0, pie-8.7.9)] on linux2
   Type "help", "copyright", "credits" or "license" for more
   information.
   >>> from __future__ import LotteryNumbers
     File "<stdin>", line 1
   SyntaxError: future feature LotteryNumbers is not defined
   >>> 

Damn.  

I guess it's back to work then.

-- 
Grant Edwards                   grante             Yow!  It's a lot of fun
                                  at               being alive... I wonder if
                               visi.com            my bed is made?!?


From nagle at animats.com  Wed Jan 31 22:36:25 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 01 Feb 2007 03:36:25 GMT
Subject: division by 7 efficiently ???
In-Reply-To: <1170299594.491478.310430@a34g2000cwb.googlegroups.com>
References: <1170297774.859006.29490@a75g2000cwd.googlegroups.com>
	<mailman.3385.1170298932.32031.python-list@python.org>
	<1170299594.491478.310430@a34g2000cwb.googlegroups.com>
Message-ID: <Zedwh.6773$O02.5547@newssvr11.news.prodigy.net>

krypto.wizard at gmail.com wrote:
> Its not an homework. I appeared for EA sports interview last month. I
> was asked this question and I got it wrong. I have already fidlled
> around with the answer but I don't know the correct reasoning behind
> it.

    The answer to that question is that the fastest way to divide
by 7 is to use the divide instruction.   You'd have to go down
to a really old 8-bit microprocessor like the Intel 8051 to
find something where bit-twiddling like that pays off.

    And no way would this be a win in Python, which is
interpreted.

				John Nagle


From danb_83 at yahoo.com  Fri Jan  5 01:13:26 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 4 Jan 2007 22:13:26 -0800
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <mailman.2310.1167976648.32031.python-list@python.org>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<7.0.1.0.0.20070105004837.05b36d98@yahoo.com.ar>
	<459DCC77.2030708@gmx.net>
	<mailman.2310.1167976648.32031.python-list@python.org>
Message-ID: <1167977606.551848.49160@11g2000cwr.googlegroups.com>

On Jan 4, 11:57 pm, belinda thom <b... at cs.hmc.edu> wrote:
...
> So, back to my question: is a catalog of standard python errors
> available? I've looked on the python site but had no success.

>>> [name for name in dir(__builtins__) if name.endswith('Error')]
['ArithmeticError', 'AssertionError', 'AttributeError', 'EOFError',
'EnvironmentError', 'FloatingPointError', 'IOError', 'ImportError',
'IndentationError', 'IndexError', 'KeyError', 'LookupError',
'MemoryError', 'NameError', 'NotImplementedError', 'OSError',
'OverflowError', 'ReferenceError', 'RuntimeError', 'StandardError',
'SyntaxError', 'SystemError', 'TabError', 'TypeError',
'UnboundLocalError', 'UnicodeDecodeError', 'UnicodeEncodeError',
'UnicodeError', 'UnicodeTranslateError', 'ValueError',
'ZeroDivisionError']



From gagsl-py at yahoo.com.ar  Wed Jan  3 18:25:35 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 03 Jan 2007 20:25:35 -0300
Subject: import order or cross import
In-Reply-To: <Xns98AD6F4382DA5duncanbooth@127.0.0.1>
References: <mailman.2236.1167814387.32031.python-list@python.org>
	<Xns98AD6F4382DA5duncanbooth@127.0.0.1>
Message-ID: <7.0.1.0.0.20070103202254.056c5758@yahoo.com.ar>

At Wednesday 3/1/2007 07:56, Duncan Booth wrote:

>However, you really should try to separate scripts from modules otherwise
>the double use as both __main__ and a named module is going to come back
>and bite you.

I second this. Something with a __main__ can use (import) other 
modules, but shoud not be used (imported) by anyone.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From carsten at uniqsys.com  Tue Jan  2 08:43:38 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 02 Jan 2007 08:43:38 -0500
Subject: Special Characters (Unicode, Ascii) in Python and MySQL
In-Reply-To: <1167717459.802890.96740@n51g2000cwc.googlegroups.com>
References: <1167717459.802890.96740@n51g2000cwc.googlegroups.com>
Message-ID: <1167745418.3387.8.camel@dot.uniqsys.com>

On Mon, 2007-01-01 at 21:57 -0800, ronrsr wrote:
> I have an MySQL database called zingers. The structure is:
> 
> zid - integer, key, autoincrement
> keyword - varchar
> citation - text
> quotation - text
> 
> I am having trouble storing text, as typed in latter two fields.
> Special characters and punctuation all seem not to be stored and
> retrieved correctly.
> 
> Special apostrophes and single quotes from Microsoft Word are causing a
> special problem, even though I have ''ed all 's
> 
> perhaps the encoding of the database itself should be different? it is
> currenlty latin_swedish_ci
> 
> Input and output is through a browser.
> 
> I think my problem may be that I need to encode the string before
> saving it in the databse. Can anyone point me in the right direction
> here?
> 
> 
> 
> here's the error message:
> 
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position
> 95: ordinal not in range(128)
>       args = ('ascii', "update zingers set keywords =
> 'a;Action;b;Religi... \n \n \n ' where zid = 422", 95, 96, 'ordinal not
> in range(128)')
>       encoding = 'ascii'
>       end = 96
>       object = "update zingers set keywords = 'a;Action;b;Religi... \n
> \n \n ' where zid = 422"
>       reason = 'ordinal not in range(128)'
>       start = 95
> 
> 
> 
> the characters I am trying to add are startquote and endquote copied
> and pasted from Microsoft Word.
> 
> 
> 
> Can anyone help me on this?

Apparently not, since you've already posted this problem on December
18th and got various responses. Did you read
http://effbot.org/pyfaq/how-do-i-escape-sql-values-when-using-the-db-api.htm as Fredrik suggested in the earlier thread?

-Carsten




From dtgeadamo at yahoo.com  Sun Jan 28 11:41:26 2007
From: dtgeadamo at yahoo.com (Viewer T.)
Date: 28 Jan 2007 08:41:26 -0800
Subject: Python interfacing with COM
Message-ID: <1170002486.751749.23180@m58g2000cwm.googlegroups.com>

I am quite a newbie and I am trying to interface with Microsoft Word 
2003 COM with Python. Please what is the name of the COM server for 
Microsoft Word 2003?



From metsakuri at gmail.com  Thu Jan  4 03:34:53 2007
From: metsakuri at gmail.com (tonisk)
Date: 4 Jan 2007 00:34:53 -0800
Subject: pow() works but sqrt() not!?
In-Reply-To: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
Message-ID: <1167899693.759071.51450@31g2000cwt.googlegroups.com>

you forgot to import math module

>>> import math
>>> math.sqrt(9)
3.0

if you want math functions to your current namespace use:
>>> from math import *

--
T?nis

On Jan 4, 10:13 am, "siggi" <smusnmrNOS... at yahoo.com> wrote:
> Hi all,
>
> this is a newbie question on :
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on
> win32
> PC with WinXP
>
> Inhttp://www.python.org/doc/2.3.5/lib/module-math.html
> I read:
>
> "sqrt( x) Return the square root of x."
>
> Now the test for module math with function pow():
> --------------------------------------------------->>> pow(9,9)387420489
>
>  Fine, but sqrt() fails:
> ------------------->>> sqrt(9)I get this error message
>
> 'Traceback (most recent call last):
>   File "<pyshell#3>", line 1, in <module>
>     sqrt(9)
> NameError: name 'sqrt' is not defined'
>
> Same for sin() and cos(). ">>> Import math" does not help. Will I have to
> define the sqrt() function first? If so, how?
> 
> Please help!
> 
> Thank you,
> 
> Siggi



From cvanarsdall at mvista.com  Wed Jan 24 11:58:51 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 24 Jan 2007 08:58:51 -0800
Subject: The reliability of python threads
Message-ID: <45B7904B.90303@mvista.com>

Hey everyone, I have a question about python threads.  Before anyone 
goes further, this is not a debate about threads vs. processes, just a 
question.

With that, are python threads reliable?  Or rather, are they safe?  I've 
had some strange errors in the past, I use threading.lock for my 
critical sections, but I wonder if that is really good enough.

Does anyone have any conclusive evidence that python threads/locks are 
safe or unsafe?

Thanks,

Carl

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From deets at nospam.web.de  Wed Jan 31 06:57:56 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 31 Jan 2007 12:57:56 +0100
Subject: another newbie question: why should you use "*args" ?
References: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
Message-ID: <52bei4F1n0f69U1@mid.uni-berlin.de>

stef wrote:

> 
> why should I use *args,
> as in my ignorance,
> making use of a list (or tupple) works just as well,
> and is more flexible in it's calling.
> So the simple conclusion might be: never use "*args",
> or am I overlooking something ?

Yup. For example decorators, that wrap functions. If you do that, you want
to return a function that captures all passed arguments, does something,
and then invokes the original function with the original arguments. Like
this:


def logging_decorator(f):
    def _f(*args, **kwargs):
        print "calling %r with (%r, %r)", % (f, args, kwargs)
        return f(*args, **kwargs)

    return _f


@logging_decorator
def im_just_a_function(some, argument, and, other=None):
    pass




Diez


From gagsl-py at yahoo.com.ar  Mon Jan  8 13:48:26 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 08 Jan 2007 15:48:26 -0300
Subject: More Efficient fnmatch.fnmatch for multiple patterns?
In-Reply-To: <1168279822.921033.267210@v33g2000cwv.googlegroups.com>
References: <1168279822.921033.267210@v33g2000cwv.googlegroups.com>
Message-ID: <7.0.1.0.0.20070108154603.036d5708@yahoo.com.ar>

At Monday 8/1/2007 15:10, abcd wrote:

>I am using fnmatch.fnmatch to find some files.  The only problem I have
>is that it only takes one pattern...so if I want to search using
>multiple patterns I have to do something like....
>
>patterns = ['abc*.txt', 'foo*']
>
>for p in patterns:
>     if fnmatch.fnmatch(some_file_name, p):
>         return True
>
>...is there a built-in function that will match using multiple patterns?

matched = any(fnmatch(filename, p) for p in patterns)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From gantgold at yahoo.com  Tue Jan 16 12:16:02 2007
From: gantgold at yahoo.com (gandalf gold)
Date: Tue, 16 Jan 2007 09:16:02 -0800 (PST)
Subject: smtplib question
Message-ID: <20070116171602.72920.qmail@web62308.mail.re1.yahoo.com>

Hi everyone,

I was trying out smtplib and found out that I can email to anyone in my domain but not to an email address not in the domain. From browsing on the web, it seems that this has to do with the configuration of the mail server. The mail server in my organization is MS exchange. Obviously I can email to any email address from my MS outlook.

What's the easiest way to fix the program? 

Thanks.

- gan

import sys, smtplib
fr = "xxx at yyy.com"
to = "xxx at zzz.com" # will not work
line = "testing"
subj = "subject line"
msg = "From: %s\r\nTo: %s\r\nSubject: %s\r\n\r\n%s" % (fr, to, subj, line)
server = smtplib.SMTP("EXCHCLUSTER.ccis.edu")
server.set_debuglevel(1)
server.sendmail(fr, [to], msg)
server.quit()





 
____________________________________________________________________________________
Do you Yahoo!?
Everyone is raving about the all-new Yahoo! Mail beta.
http://new.mail.yahoo.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070116/e92ce493/attachment.html>

From stuart at bmsi.com  Mon Jan 22 19:51:48 2007
From: stuart at bmsi.com (Stuart D. Gathman)
Date: Mon, 22 Jan 2007 19:51:48 -0500
Subject: Best way to document Python code...
References: <1169492869.101706.253620@38g2000cwa.googlegroups.com>
	<tj9th.13185$pQ3.6593@newsread4.news.pas.earthlink.net>
	<pan.2007.01.22.22.35.17.956837@bmsi.com>
Message-ID: <pan.2007.01.23.00.51.48.352252@bmsi.com>

On Mon, 22 Jan 2007 17:35:18 -0500, Stuart D. Gathman wrote:

> The HTML generated by pydoc doesn't link to standard modules properly. 
> They are generated as relative links.  So it can't be used without
> modification for generating docs for a web page about a python package. 
> 
> I'm struggling with the same issue.  Coding Python is so much easier than
> Java.  However documenting Java is so much easier than Python.  Just
> include doc comments, run javadoc, and voila!

Wow!  I just tried epydoc, and it is every bit as easy as javadoc and
with similar output. Too bad it isn't standard.  But the comments and
docstrings it parses work fine with pydoc also.

-- 
	      Stuart D. Gathman <stuart at bmsi.com>
Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.



From kentsin at gmail.com  Tue Jan  2 20:08:27 2007
From: kentsin at gmail.com (kent sin)
Date: Wed, 3 Jan 2007 09:08:27 +0800
Subject: Filename encoding on XP
Message-ID: <aa8794290701021708j3b037157g804c4d67ae0ab7a3@mail.gmail.com>

What encoding does the NTFS store the filename?

I got some downloaded files, some with Chinese filename, I can not
backup them to CD because the name is not accepted.

I use walk, then print the filename, there are some ? in it, but some
Chinese characters were display with no problem. I suspect the
encoding of the filename is not unicode. How do I find out more about
this?

-- 
Sin Hang Kin.


From bedouglas at earthlink.net  Sun Jan 14 19:36:58 2007
From: bedouglas at earthlink.net (bruce)
Date: Sun, 14 Jan 2007 16:36:58 -0800
Subject: python - process id
Message-ID: <109f01c7383d$45666f10$0301a8c0@tmesa.com>

hi...

is there a way to have a test python app, get its' own processID. i'm
creating a test python script under linux, and was wondering if this is
possible..

also, i've tried using an irc client to join the irc #python channel, and
for some reason i keep getting the err msg saying that the 'address is
banned' i've never been to the python channel, but i'm using dsl, so i'm
getting a dynamic address.. and yeah, i've tried changing the address a
number of times..

thanks




From paddy3118 at netscape.net  Tue Jan  9 02:29:56 2007
From: paddy3118 at netscape.net (Paddy)
Date: 8 Jan 2007 23:29:56 -0800
Subject: Colons, indentation and reformatting. (2)
In-Reply-To: <45a33a24$0$7658$4c368faf@roadrunner.com>
References: <1168323368.592642.314130@i15g2000cwa.googlegroups.com>
	<45a33a24$0$7658$4c368faf@roadrunner.com>
Message-ID: <1168327796.187713.107530@38g2000cwa.googlegroups.com>


Paul McGuire wrote:

> "Paddy" <paddy3118 at netscape.net> wrote in message
> news:1168323368.592642.314130 at i15g2000cwa.googlegroups.com...
> >I was just perusing a Wikipedia entry on the "off side rule" at
> > http://en.wikipedia.org/wiki/Off-side_rule .
> > It says that the colon in Python is purely for readability, and cites
> > our FAQ entry
> > http://www.python.org/doc/faq/general.html#why-are-colons-required-fo...
> > .
> > However, near the top of the Alternatives section, it states that for C
> > type, curly braces using languages:
> >  "An advantage of this is that program code can be automatically
> > reformatted and neatly indented without fear of the block structure
> > changing".
> >
> > Thinking about it a little, it seems that a colon followed by
> > non-indented code that has just been pasted in could also be used by a
> > Python-aware editor as a flag to re-indent the pasted code.
> >
> > Tell me it is not so, or I will be editing the Wikipedia page I think.
> >
> > - Paddy.
> >
> No, the ambiguity comes in when you have a nested construct within another
> nested construct. Here is some (fake) code where all the indentation was
> lost after pasting through a badly-behaved newsreader (this is NOT real
> code, I know that it wont really run, I'm just trying to demonstrate the
> indentation issue):
>
> while x:
> a = 100
> if b > 3:
> a += 1
> b += 1
>
> Here are some valid indented versions:
>
> while x:
>     a = 100
> if b > 3:
>     a += 1
> b += 1
>
> while x:
>     a = 100
>     if b > 3:
>         a += 1
>         b += 1
>
> while x:
>     a = 100
>     if b > 3:
>         a += 1
>     b += 1
>
> while x:
>     a = 100
>     if b > 3:
>         a += 1
> b += 1
>
> The colons alone are not sufficient to tell us which is correct.
>
> -- Paul
Won't the following rules work when pasting complete Python statements
and complete lines, after other lines in an editor:

lets call the line after which the block is to be pasted the paste
line, and the original indent of the first line of the copied block to
be pasted the copy indent.

If the paste line ends in a colon then the copy indent must be greater
than the paste line indent, or the copy block should be re-indented on
pasting to make it so.
If the paste line does not end in a colon then the copy block indent
should be equal too or less than the paste line indent. If this is not
the case then the user should be asked wether to re-indent the copy
block to be equal to, or de-dented w.r.t. the paste line indent prior
to pasting.

- Paddy.



From citronelu at yahoo.com  Mon Jan  8 15:45:45 2007
From: citronelu at yahoo.com (citronelu at yahoo.com)
Date: 8 Jan 2007 12:45:45 -0800
Subject: Execute binary code
In-Reply-To: <EOSdneXxmrS6OT_YnZ2dnUVZ_q7inZ2d@comcast.com>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<EOSdneXxmrS6OT_YnZ2dnUVZ_q7inZ2d@comcast.com>
Message-ID: <1168289145.319706.199950@11g2000cwr.googlegroups.com>

Larry Bates wrote:

> What you are asking is a virus/trojan "like" program.  There's no reason
> you shouldn't be able to write the code to TEMP directory and execute it.
>
> -Larry


No, it is not about a trojan, but I guess it's pointless to try to
convince you otherwise.

It's not about being able to write the code to TEMP directory and
execute it, it's about not wanting to do so.

-Cornelius



From vinoth.3v at gmail.com  Sat Jan 13 00:55:28 2007
From: vinoth.3v at gmail.com (=?utf-8?B?4K614K6/4K6p4K+L4K6k4K+N?=)
Date: 12 Jan 2007 21:55:28 -0800
Subject: How can I integrate RPC with WSGI ???
Message-ID: <1168667728.272747.186210@a75g2000cwd.googlegroups.com>

How can I integrate RPC with WSGI ???
 is any methods for it??



From bjourne at gmail.com  Sat Jan  6 19:54:00 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Sun, 7 Jan 2007 00:54:00 +0000
Subject: Why less emphasis on private data?
In-Reply-To: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
Message-ID: <740c3aec0701061654g6a3b53e9h6403343784f026e6@mail.gmail.com>

On 6 Jan 2007 16:07:05 -0800, time.swift at gmail.com <time.swift at gmail.com> wrote:
> Coming from a C++ / C# background, the lack of emphasis on private data
> seems weird to me. I've often found wrapping private data useful to
> prevent bugs and enforce error checking..
>
> It appears to me (perhaps wrongly) that Python prefers to leave class
> data public.  What is the logic behind that choice?

Google for "python for consenting adults"

Or ask yourself the opposite question. Why does C++ and C# prefer more
private data? It is given that emphasizing private data
(encapsulation) leads to more internal complexity and more lines of
code because you have to write getters and setters and stuff. With
that in mind, why do you think that data encapsulation makes code less
error prone? Can you prove it? Or do you have anecdotal evidence of
where data encapsulation saved your ass?

IMHO, that data hiding is good, is one of those ideas that have been
repeated so much that virtually everyone thinks it is true.  But
Python proves that it isn't necessarily so.

-- 
mvh Bj?rn


From 12cc104 at gmail.com  Sun Jan  7 23:53:21 2007
From: 12cc104 at gmail.com (proctor)
Date: 7 Jan 2007 20:53:21 -0800
Subject: regex question
Message-ID: <1168232001.377605.236270@11g2000cwr.googlegroups.com>

hello,

i hope this is the correct place...

i have an issue with some regex code i wonder if you have any insight:

================

import re, sys

def makeRE(w):
	print w + " length = " + str(len(w))
	reString = "r'" + w[:1]
	w = w[1:]
	if len(w) > 0:
		for c in (w):
			reString += "|" + c
	reString += "'"
	print "reString = " + reString
	return reString

test = sys.argv[1]
stg = sys.argv[2]

while test:
	print "test = ", test
	print "stg = ", stg
	rx_a = re.compile(makeRE(test))
	i = rx_a.search(stg).start()
	print "i = " + str(i)
	id = test.find(stg[i])
	test = test[:id] + test[id+1:]
	print "test == ", test
	stg = stg[:i] + stg[i+1:]
	print

================

i get the following output:

================

test =  abc
stg =  defabc
abc length = 3
reString = r'a|b|c'
i = 4
test ==  ac

test =  ac
stg =  defac
ac length = 2
reString = r'a|c'
Traceback (most recent call last):
  File "aaaa.py", line 21, in ?
    i = rx_a.search(stg).start()
AttributeError: 'NoneType' object has no attribute 'start'

=================

i am fairly new to this, and can't see the reason for the error.  what
am i missing?

btw, i think there are simpler ways to go about this, but i am doing it
this way (regexs) for a bit of a challenge and learning experience.

thanks to all!

sincerely,
proctor



From indy90 at gmail.com  Thu Jan 25 12:18:12 2007
From: indy90 at gmail.com (Indy)
Date: Thu, 25 Jan 2007 19:18:12 +0200
Subject: asyncore.dispatcher.handle_read
Message-ID: <725281c20701250918i31fd8a68xd1911af92cfb02a6@mail.gmail.com>

Greetings.

I am writing an asynchronous server, and I use the standard library's
module asyncore.
I subclass asyncore.dispatcher. handle_accept works just right, that
is, when a client socket makes a request to connect to my server
socket, things that I set in handle_accept definition, happen. So, it
is OK. But, the problem is that handle_read does not work as expected.
Things I set in handle_read definition, do not happen when a client
socket sends me data. Why? Is this a known problem? Please, can you
help me?
Thanks a lot, in advance.

Best regards,
Aristotelis Mikropoulos

-- 
Programs must be written for people to read, and only incidentally for
machines to execute.


From py at th.on  Tue Jan 23 19:10:49 2007
From: py at th.on (py)
Date: Wed, 24 Jan 2007 00:10:49 GMT
Subject: smtplib starttls gmail example
Message-ID: <duxth.1927$dN2.742@trnddc07>

Hmm, my last post seems to have been redirected to /dev/null. Anyhoo.
Jean Paul, I read your code with interest. Does twisted also raise the apparently well-known
and often ignored socket error, and do you supposed this error has something to do with the
fact that the trailing \n.\n is encrypted? the error msg reports something about premature eof.
altho one would suppose the commands and data are decrpyted before the smtp daemon
sees them....

-dave


From horpner at yahoo.com  Wed Jan 10 11:14:28 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Jan 2007 17:14:28 +0100
Subject: Working with named groups in re module
References: <slrneq9vl3.bg.horpner@FIAD06.norwich.edu>
	<mailman.2535.1168442360.32031.python-list@python.org>
Message-ID: <slrneqa4c9.1jc.horpner@FIAD06.norwich.edu>

On 2007-01-10, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Neil Cerutti wrote:
>> A found some clues on lexing using the re module in Python in
>> an article by Martin L?wis.
>
>>   Here, each alternative in the regular expression defines a
>>   named group. Scanning proceeds in the following steps:
>>
>>      1. Given the complete input, match the regular expression
>>      with the beginning of the input.
>>      2. Find out which alternative matched.
>
> you can use lastgroup, or lastindex:
>
> http://effbot.org/zone/xml-scanner.htm
>
> there's also a "hidden" ready-made scanner class inside the SRE
> module that works pretty well for simple cases; see:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/457664

Thanks for the excellent pointers.

I got tripped up:

>>> m = re.match('(a+(b*)a+)', 'abbbbaa')
>>> dir(m)
['__copy__', '__deepcopy__', 'end', 'expand', 'group', 'groupdict', 'groups', 'span', 'start']

There are some notable omissions there. That's not much of an
excuse for my not understanding the handy docs, but I guess it
can can function as a warning against relying on the interactive
help.

I'd seen the lastgroup definition in the documentation, but I
realize it was exactly what I needed. I didn't think carefully
enough about what "last matched capturing group" actually meant,
given my regex. I don't think I saw "name" there either. ;-)

  lastgroup 
  
  The name of the last matched capturing group, or None if the
  group didn't have a name, or if no group was matched at all. 

-- 
Neil Cerutti
We dispense with accuracy --sign at New York drug store


From jon at ffconsultancy.com  Tue Jan  2 20:14:20 2007
From: jon at ffconsultancy.com (Jon Harrop)
Date: Wed, 03 Jan 2007 01:14:20 +0000
Subject: Writing more efficient code
References: <mailman.2185.1167676577.32031.python-list@python.org>
	<459959ea$0$8719$ed2619ec@ptn-nntp-reader02.plus.net>
	<1167687229.430930.197720@v33g2000cwv.googlegroups.com>
	<459989ec$0$8759$ed2619ec@ptn-nntp-reader02.plus.net>
	<1167699678.310643.140480@n51g2000cwc.googlegroups.com>
Message-ID: <459b03e5$0$8725$ed2619ec@ptn-nntp-reader02.plus.net>

bearophileHUGS at lycos.com wrote:
> Jon Harrop:
>> I think most people could pick up the core ideas in a day and start
>> writing working programs.
> 
> Probably I am not that intelligent, I probably need some months :-) But
> that language has many good sides, and one day I'll probably try to
> learn it a bit.

It is very cool, and there are a growing number of resources about these
languages. You might also like to try Microsoft's F#, which runs
under .NET.

>> Mathematica is expensive but learning to use pattern matching is much
>> easier than learning how to write a pattern matcher and much less tedious
>> than reimplementing it yourself all the time (which is exactly what the
>> OP will end up doing).
> 
> I see. This is a very old post of mine, at the bottom there are few
> notes about the Mathematica pattern matching syntax:
> http://groups.google.com/group/comp.lang.python/msg/93ce3e9a08f5e4c7

Yes. Lots of good points. I think this sort of functionality would be a
welcome addition to Python. What is the easiest way to add such
functionality to Python? Perhaps it can be written in Python?

> To avoid reimplementing it yourself all the time then maybe someone
> (you?) can try to write a good pattern matcher for sequences for
> CPython. With such system it may become less important to switch to a
> different language ;-)

I think that is an excellent idea. Who will pay me? ;-)

-- 
Dr Jon D Harrop, Flying Frog Consultancy
Objective CAML for Scientists
http://www.ffconsultancy.com/products/ocaml_for_scientists/index.html?usenet


From conferrer at cuartilla.jp  Wed Jan 24 10:26:46 2007
From: conferrer at cuartilla.jp (rocky)
Date: 24 Jan 2007 15:26:46 GMT
Subject: for thibaut: genuinely excellent pictures -  umcu - (1/1)
Message-ID: <76554951z39773H643349837Z967779246Q5681E633493486P@news.cuartilla.jp>

Hello,

Images, video, mp3 music, the real news from around the world... it's all inside waiting for you.
You can find almost anything you are looking for.
They offer some of the best premium newsgroup access anywhere.
One thing I love about them, they don't keep log files of the news I read or files I download.
Take a look, I know you'll love it as much as I do.
They give you access to some of the best groups others may not carry.
Great prices and support await you as you travel into the beautiful world of premium nntp access.
Take a look at all the great features below and imagine! You'll LOVE it.

Blazing fast downloads
Posting allowed!
Convenient thumbnail indexes
Very long retention
Keyword searchable
Streaming audio and video
2,000,000 new posts each day

Just go to http://www.newsdude.net and see why I love them so much. Have a great night!


Jik hel ki vatnuzehgow newdebotrig totva fesmo, riwwi berte doy berwa guypo!
At absa i ecci. Evwu rop marke huppu ok i anyo ovtu! Rog pi sahmilunyiw bashorasnah
ak hud! Uh irfu up op awtu. I iskutagyuf ruz vi gevsigushes hitmi mafri dapji, futwe
it diz nog ot ur atmi. Osja ahhe i emsekuzpid, bey fuhfa ni sokgeferjub gamtosogjos
bah! Of uyho egsi i ecnu oscelapsob akso as i anyocazgol offu! I peh nohtiwedjip
didpu gi huczu mevpapudpom jud fojru nohyu! Oj uzhi i ug embi if i apta! Uvbicerdez
ecru i oywo. Okcemokfal iybo uz i ejyerowlur lis gi vum mudhi ev ar! Ahpes ewfu kir
mi vizkihudduk rakbewuwgif pi wofco sewyuzucdiw zusso sin. Mapja hi dac nirgasaktik
og i irbemommij iskapojbes uywa fiw, ri ut ivde i zot pepwomekyak tavru ki huz dal.
Ref jecfo gi az umminizpez avga i eh abpa i ejne onwavepgeb, okca azzi i ler tuhtu
dezpu! Ib i ofmijihvej on, i evda anyohiknah i ton, zajsocehmel tonci vuplutiv
dezva sen ib olre azyu wum! Sahci nellu gento, pi ed et ewze i onricodjaf! Ufme ujmi
ilni i evli if i wut zigyusagjez wi zosgofuptum, il ozne ujhu, ecwi awvu i ihcovogkat!
Of nep vi coh hablazezgav ci pagro, zer bi firto ak esfi i un! Arwusuftez ahpo i or
ovmo um i on egli opwi, sik pujgu fi cohzejokyaj tojkadeyref fi deryubavzon memde
jibpu! Bid di biztukesdof ic pin oz av i eyrutarrav! Apya ehbi uvgi ugyi i amco ulmuzaccum!
Ak i riw pez toyweb, vi bemba zovsinuscav fi bes duswa ji og ud, asze i azyi ey niz sos
nurku. Bucbu ji er izlo liv sijgo ruy lacje ef i orpo! Intozudpup i otka oryedebbaz
i addi akwo ec afre i ur, ehzonekhuv uste afju utvi er, i okza oh apsu ar uzhe ehtu!
Umja al i jok cagluluwdek fun ri if bos debga zecju! Mi nof geska cahva gon ji mumsezuphop,
tocvu ki juhyehemyog faygopubjow! Marwe luh dik pipge, hogli tuj ci wajmi fevni.
Hi cammahibnul pebki deksa bowva nar sodtu peyfo kewgi! Ji lif jigpu li nadnis bobgehacboj
jesne ti vazrofergih ik, avko i ubdulaltid asgorojhob i ebrokemlac uwvafukgat
egbi i atyu ibkihamyeg! Amke em i awfosorbam bam uk ov kaf vi jakfuvapset. Up par
ec! I uspu hul pi ut vel pi zulva patni. Oy ewle uspo azto. I agpi kik ah i osji ar i ecri
wij, vi hozmu ap ifke usfu! Orro um ay i afyu ceh hi dibmu! Visbinivpuw ti jiv wagbe
pezte lar. Dopli if agyo i ur evmelicbog az, ifyu i apru uzfo! I odto os i buv. Ik god
tejge caj, vi jev fir mi hobbe. Vohjigiydap ji toj ac enlu i is apremubhuw i ehju osda
ber, gul at i ohce, utheceswez ohci ak ukhu i ozvo iffo, ipzu ol evha i if, ujziruhpuf
upke is i azdo asto i onyatewwil obhebikrid i ojyu. Den zazja wi serpa numbenidfav,
sidve vuf li fumhulokwaw un avsi ewwi uthi i izbivahhel. Etku ged wej fafki vip ti
ew asbi. Igpu keh pi dov vekvojavhuk ri hakge, is ejne gow! Pi kisre luzpeweggib
kas law repri zecdu om i ezlu aj, i owja apgelidyek uk sal ev i rak. Necsakigtat mol
rofce davbu mohke razca, bimso vuw hassi degha ni ramla, babyinokzak kojmazow
ov ub, i uvse efhecujfup igde iwwi ucro arle i empu ossowargat, dap huv ci buf molko.
Hen ki sugha kekpirojjoz ni hokku jij nobni tiv. Bofli vi tahja vep, pi af ebjubatwum
sis lurni hacji ig i isni epfu! Amga ezke i osja nin jub fedba uh mov. Al ucra kow. Farsa
ciknu uj as joy bi didde oz ahri bab. Dogme mi ot isle i bav cigtofitcos. Ti oz adnekorsob
on eszu ewvu owri i atru. Ofge utto izwu gih ji negdesalfaz coy hi vochurecnan cacgepocmup.
Si jobkav nop von, juyda vi hijja rog vulhe. Bonto uw i ogvigotmif esmapiwceg is
igvi i ey. Em i inzeficnev hih, an i ergi apdo uzfe i okze iryu ukci den luj. Vofge si
fob it zat uf ipzu i erki ic i oslulutcer. Onkubohyiz ab i avse ec i am al! Uz i inpegirmiw
ses ji voprorurlak en. Ispo izsi sek wi reyci ug how vi luz wenpozommol, am ir kag
ij ehso i av hil, el moc rem uy pug fi sikro. Gev mon iz ug ofvu ud onfo i uzyocujzun!
Naz wudri sic li mozciporcaw dew honte si pefpu! Wezwurobvuz dilpu bi ik dar wogwu.
Tawzi ci vih ib i ezyonecweg opcu i alze wib iy! Hin bi jat dazcudorzoh vi bugjo suh
ri mohragepbol. Huvyihakseb wi luhtukonled rabladorrih pidjo. Ej did up! Ibti
i uybulujwup rum om ozma ogdu i aw, bab ti ig kok di ay eywi. I ukzegarnov ekro avru
ekka i oh urcutikvaz eg okfa. Zuv li had uk onma, i iskociftam etro kik wab likmo cokdu
ey, eb efpem im ikyo ucfa i ayko eypakojbed! I elfetejjeb olma i av ip, updac i urnafetras
uncejuwbif etvo ibba ihzo ah muc losbe. Ti cavlucihrid hubna pijye hi ag us i wab
jefbi! Foksa degju ni feyjo bisli. Cob af izdo fib gopna! Jud coj kol li et opzunerfun
set od i kac git! Wurpa uv i oyli ayrajilcaw i adze, ucwu poh ti nalde, jufyi al uvvi
ceh gobju! Af i isya pep ki woc jehsogangup ni iz iy usce ed! I mid cargecascuw bew
vi nogva wicyuguknum vum! Jofmo rujge ji tukto kut ep ot opju, epva i adji ocgocobjin
i duy gabze ciwme ...


From sndive at gmail.com  Thu Jan 25 21:30:09 2007
From: sndive at gmail.com (sndive at gmail.com)
Date: 25 Jan 2007 18:30:09 -0800
Subject: How do I build python with debug info? (and python module load
	questions)
Message-ID: <1169778609.559899.26160@k78g2000cwa.googlegroups.com>

I want to step into PyImport_ImportModule("my_foo") that's failing
despite the my_foo.py
being in the current directory. (PyRun_SimpleFileEx works on the exact
same file).
How would I run configure to build libpython with -g?

I wonder if I should just keep using PyRun_SimpleFileEx.

I want to be able to call arbitrary functions in the imported
file/module
using PyRun_SimpleString("import my_foo\nmy_foo.bar(whatever)")
after the file is loaded.

There is no '' in sys.path, I assume that should not affect
PyImport_ImportModule
to look in the current directory first. Does it?

Thank you!



From piotrlewalski at gmail.com  Sat Jan 13 14:04:17 2007
From: piotrlewalski at gmail.com (piotr)
Date: Sat, 13 Jan 2007 20:04:17 +0100
Subject: template engine
References: <pan.2007.01.13.18.29.24.499240@gmail.com>
	<8764ba7oqf.fsf@gmail.com>
Message-ID: <pan.2007.01.13.19.04.17.189220@gmail.com>

On Sat, 13 Jan 2007 16:42:16 -0200, Jorge Godoy wrote:

> Take a look at Kid (http://www.kid-templating.org/) and Genshi
> (http://genshi.edgewall.org/).

I've already done a short look at kid, but to be honest I don't like it's
XML/Python syntax. I strongly prefer idea from SimpleTAL or HTMLTemplates
where HTML and Python code are separated.
But syntax is for me not so important like functionality so maybe I have
to get back and look at kid again :)

any other engines? :)

thanks
//peter


From gagsl-py at yahoo.com.ar  Sat Jan 13 09:55:30 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 13 Jan 2007 11:55:30 -0300
Subject: ValueError from dict - some detail would be helpful
References: <1168529175.794131.109390@77g2000hsv.googlegroups.com>
	<eo8agn$5au$1@sea.gmane.org>
Message-ID: <eoarsv$4pi$1@sea.gmane.org>

"Facundo Batista" <facundo at taniquetil.com.ar> escribi? en el mensaje 
news:eo8agn$5au$1 at sea.gmane.org...
> metaperl wrote:
>
>>   File "/sw/lib/python2.5/csv.py", line 120, in _dict_to_list
>>     raise ValueError, "dict contains fields not in fieldnames"
>>
>>
>> --- it would be nice if it said what field it was
>
> Yeap, nice and useful... but, for example, what'd happen if the fields
> that are not in fieldnames are 10, or 100? How the message could be?

The code inside _dict_to_list currently just stops at the first unknown key. 
Just report that - much better than nothing.
http://sourceforge.net/tracker/index.php?func=detail&aid=1634717&group_id=5470&atid=355470

-- 
Gabriel Genellina 





From __peter__ at web.de  Tue Jan  9 13:42:05 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 09 Jan 2007 19:42:05 +0100
Subject: Question about using "with"
References: <mailman.2487.1168367035.32031.python-list@python.org>
Message-ID: <eo0nlq$nu8$03$1@news.t-online.com>

Steven W. Orr wrote:

>>From the tutorial, they said that the following construct will
> automatically close a previously open file descriptor:
> 
> -------------------
> #! /usr/bin/python
> import sys
> 
> for nn in range ( 1, len(sys.argv ) ):
>      print "arg ", nn, "value = ", sys.argv[nn]
>      with open(sys.argv[nn]) as f:
>          for line in f:
>              print line,
> ------------------
> 
> but when I run it (with args) I get:
> 
> 591 > ./cat.py cat.py
>    File "./cat.py", line 6
>      with open(sys.argv[nn]) as f:
>              ^
> SyntaxError: invalid syntax
> 592 >
> 
> This example came from http://docs.python.org/tut/node10.html down in
> section 8.7
> 
> Am I missing something?

The with-statement only works in Python 2.5, and you have to enable it
explicitly:

>>> from __future__ import with_statement
>>> with open("tmp.txt") as f:
...     print len(f.read())
...
15
>>> f.read()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: I/O operation on closed file

Peter


From parallelpython at gmail.com  Sat Jan 13 13:32:50 2007
From: parallelpython at gmail.com (parallelpython at gmail.com)
Date: 13 Jan 2007 10:32:50 -0800
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2641.1168602795.32031.python-list@python.org>
Message-ID: <1168713168.608367.221350@51g2000cwl.googlegroups.com>

> Looks interesting, but is there any way to use this for a cluster of
> machines over a network (not smp)?

Networking capabilities will be included in the next release of
Parallel Python software (http://www.parallelpython.com), which is
coming soon.


> Couldn't you just provide similar conveniences on top of MPI? Searching
> for "Python MPI" yields a lot of existing work (as does "Python PVM"),
> so perhaps someone has already done so.

Yes, it's possible to do it on the top of any environment which
supports IPC.

> That's one more project... It seems that there is significant
> interest in parallel computing in Python. Perhaps we should start a
> special interest group? Not so much in order to work on a single
> project; I believe that at the current state of parallel computing we
> still need many different approaches to be tried. But an exchange of
> experience could well be useful for all of us.
Well, I may just add that everybody is welcome to start discussion
regarding any parallel python project or idea in this forum:
http://www.parallelpython.com/component/option,com_smf/Itemid,29/board,2.0



From no-spam at no-spam-no-spam.invalid  Thu Jan 11 04:37:06 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 11 Jan 2007 10:37:06 +0100
Subject: Is there a way to protect a piece of critical code?
In-Reply-To: <mailman.2558.1168494787.32031.python-list@python.org>
References: <mailman.2524.1168424917.32031.python-list@python.org>	<eo2pgf$j57$1@news.albasani.net>
	<mailman.2558.1168494787.32031.python-list@python.org>
Message-ID: <eo50g4$hct$1@news.albasani.net>

Hendrik van Rooyen wrote:
> "robert" <no-spam at no-spam-no-spam.invalid> wrote:
> 
>> List .append() and .pop() will be atomic in any Python though its not
> mentioned explicitely - otherwise it would be time to leave Python.
>> There is also Queue.Queue - though it has unneccessary overhead for most
> purposes.
>>
> am aware of Queue module - the same app uses it for something else.
> I dont like too many try -- excepts in the code - I find they confuse
> me when I try to read it later - and in this case I cannot block on waiting for
> the queue to fill.


pushing data objects through an inter-thread queue is a major source for trouble - as this thread shows again.
Everybody builds up a new protocol and worries about Empty/Full, Exception-handling/passing, None-Elements, ...
I've noticed that those troubles disappear when a functional queue is used - which is very easy with a functional language like Python.
For example with http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491281


One would just use a  cq=CallQueue()

On the producer side one would just write the functional code one wants to execute in a target thread:

cq.call( what_i_want_do_func )


The consumer/receiver thread would just do (periodically) a non-blocking

cq.receive()


=> Without any object fumbling, protocol worries and very fast.

And note: This way - working with functional jobs - one can also "protect a piece of critical code" most naturally and specifically for certain threads without spreading locks throughout the code.
Even things which are commonly claimed "forbidden" (even when using lots of locks) can be magically done in perfect order and effectively this way. Think of worker threads doing things in the GUI or in master / database owner threads etc.

Similarly discrete background thread jobs can be used in a functional style this way:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491280
( an alternative for the laborious OO-centric threading.Thread which mostly is a lazy copy from Java )
or for higher job frequencies by using "default consumer threads" as also shown in the 1st example of 
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491281



Robert


From arkanes at gmail.com  Wed Jan 10 11:31:50 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 10 Jan 2007 10:31:50 -0600
Subject: Execute binary code
In-Reply-To: <1168445561.239053.140340@77g2000hsv.googlegroups.com>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<1168288176.054142.232780@s80g2000cwa.googlegroups.com>
	<slrneq6vga.tcj.grahn+nntp@frailea.sa.invalid>
	<1168355051.339026.211830@v33g2000cwv.googlegroups.com>
	<mailman.2486.1168358531.32031.python-list@python.org>
	<1168445561.239053.140340@77g2000hsv.googlegroups.com>
Message-ID: <4866bea60701100831h53178d2o625dcefade7b14b2@mail.gmail.com>

On 10 Jan 2007 08:12:41 -0800, sturlamolden <sturlamolden at yahoo.no> wrote:
>
> Chris Mellon wrote:
>
> > This works fine if the binary data is "pure" asm, but the impresssion
> > the OP gave is that it's a compiled binary, which you can't just "jump
> > into" this way.
>
> You may have to offset the function pointer so the entry point becomes
> correct.
>

That won't be enough. You basically would have to re-implement the OS
loading process, handling relocations and loading any linked
libraries. Possible, in theory, but very non-trivial.

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


From Barry.Carroll at psc.com  Mon Jan  8 16:25:52 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Mon, 8 Jan 2007 13:25:52 -0800
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A69@eugsrv400.psc.pscnet.com>

> -----Original Message-----
> From: python-list-bounces+barry.carroll=psc.com at python.org [mailto:python-
> list-bounces+barry.carroll=psc.com at python.org] On Behalf Of John Machin
> Sent: Saturday, January 06, 2007 11:09 PM
> To: python-list at python.org
> Subject: Re: File Closing Problem in 2.3 and 2.4, Not in 2.5
> 
> Martin v. L?wis wrote:
> > Carroll, Barry schrieb:
> > > What I want to know is:
> > >
> > > * has anyone else encountered a problem like this, * how was the
> > > problem corrected, * can the fix be retro-fitted to 2.5 and 2.4?
> >
> > From your description, I suspect an error in your code. Your description
> > indicates that you don't expect to have more than five files open
> > simultaneously. Yet, the error message "Too many open files" occurs when
> > you open many more files (in the order of hundreds of files).
> >
> > It is very unlikely that there is a bug in Python where it would fail to
> > close a file when .close() is explicitly invoked on it (as your
> > description suggests that you do), so if you get that error message, it
> > can only mean that you fail to close some files.
> 
> I don't understand:  the OP's description suggests nothing of the sort
> to me. What he said was:
> """
> In this way, a tree of Parser instances is created, each with a single
> open file object.  (BTW, recursive and circular references are not
> allowed.)  When each Parser instance comes to the end of its table, the
> instance is explicitly destroyed, presumably destroying any objects it
> holds, AND closing its open file.
> """
> which I interpret as: he is doing del parser_instance, and *presuming*
> (incorrectly) that attributes of parser_instance (including an open
> file object) are magically whisked away instantly, instead of
> later/maybe. He later says he explicitly closed the files, which fixed
> what he alleges (incorrectly) to be a bug.
> 
> To the OP:
> (1) The del statement doesn't "destroy" anything. It unbinds the name
> from the object in the current namespace, and decrements the object's
> reference count. Only if the reference count is then zero will the
> janitor be called in.
> (2) Check the reference count on the parser_instance just before you
> del it. You could be retaining a reference somewhere.
> (3) Explicitly close all non-lightweight objects like files (even
> read-only ones) and sockets rather than hoping they will go away.
> 
> HTH,
> John

John:

Thank you.  I was afraid I had been totally misunderstood.  We have retained the explicit file close in the current version of the Parser code.  

I still have a question, however.  Python 2.3 and 2.4 both produce the "Too many open files" error on Windows XP Pro, but Python 2.5 does not.  Running on the 2.5 interpreter, our program process all the table invocations with no errors, a total of over 650 file opens.  Also, Python 2.3 on RedHat Fedora core 1 runs our program to completion with no errors.  (I know, we are running pretty ancient SW here. Constraints unrelated to this question make that necessary.)  Do you know why the error would appear on some combinations of OS and interpreter and not on others?

Thanks again for your help.

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed




From piotrlewalski at gmail.com  Sat Jan 13 13:29:25 2007
From: piotrlewalski at gmail.com (piotr)
Date: Sat, 13 Jan 2007 19:29:25 +0100
Subject: template engine
Message-ID: <pan.2007.01.13.18.29.24.499240@gmail.com>

Hi,

I'm looking for a template engine that can give me names of required
variables in parse time.
Calculation of a value for a specific variable name could be possibly done
in specified callback function.

For example:

<html>
 <head>
  <title>$title</title>
 </head>
 <body>
 #if user
  hello $user/name
 #else
  hello guest
 #endif
 </body>
</html>

for above document engine should call my function first giving an argument
"title", then second time with argument "user", and optionally if result
for user was not empty call function again with argument "user/name"
then engine should replace specific placeholders with results of my
callback function
obviously this is just example syntax, I hope you catch the idea

that would be nice if engine could work with non HTML documents.

thanks in advance for your help, and sorry for my English :)
//peter


From skip at pobox.com  Tue Jan  9 08:59:32 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 9 Jan 2007 07:59:32 -0600
Subject: Using with CSV library in Python 2.2!!!
In-Reply-To: <1168348224.843657.27330@42g2000cwt.googlegroups.com>
References: <1168348224.843657.27330@42g2000cwt.googlegroups.com>
Message-ID: <17827.40900.14680.844066@montanaro.dyndns.org>


    mohan> 1. Does Python 2.2 come with CSV library module or not? If yes,
    mohan>    have I lost it somewhere??

As the docs for the csv module indicate, it was new in 2.3.

    mohan> 2. If Python 2.2 does not come with CSV module, is it possible to
    mohan>    add the csv module to the Python root and start working??

You might find that it will work with 2.2, though you might have to make
some source code changes to _csv.c to get it to compile.

    mohan> 3. If yes, where do I get this module from??

You can get both csv.py and _csv.c via ViewCVS:

    http://svn.python.org/view/*checkout*/python/tags/r236/Modules/_csv.c?content-type=text%2Fplain&rev=52574
    http://svn.python.org/view/*checkout*/python/tags/r236/Lib/csv.py?content-type=text%2Fplain&rev=52574

Skip


From duncan.booth at invalid.invalid  Mon Jan  8 12:48:23 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Jan 2007 17:48:23 GMT
Subject: sys.exit versus raise SystemExit
References: <45a26b70$0$32019$fa0fcedb@news.zen.co.uk>
	<1168273151.359419.118640@42g2000cwt.googlegroups.com>
	<45a27f06$0$31239$da0feed9@news.zen.co.uk>
Message-ID: <Xns98B2B521D7405duncanbooth@127.0.0.1>

Will McGugan <will at willNOmcguganSPAM.com> wrote:

> wittempj at hotmail.com wrote:
>> 
>> sys.exit() raises a SystemExit, see
>> http://docs.python.org/lib/module-sys.html
>> 
> Oh I know. I was just wondering if there was some sort of subtle 'best 
> practice' recommendation that I wasnt aware of for using sys.exit over 
> raising the exception manually. In the same way that 'open' is prefered 
> over 'file', even though they appear to do the same thing.

'open' is preferred when you are opening a file, 'file' is preferred when 
it is the type you want. That way you leave open the option to intercept 
the 'open' action without interfering with tests against the type.

I guess in a similar way you should prefer the overridable sys.exit() 
function rather than using the exception directly.


From bill.mill at gmail.com  Wed Jan 10 11:21:15 2007
From: bill.mill at gmail.com (Bill Mill)
Date: Wed, 10 Jan 2007 11:21:15 -0500
Subject: Regex Question
Message-ID: <797fe3d40701100821u74807093lcff2b9bd5ffe5359@mail.gmail.com>

Hello all,

I've got a test script:

==== start python code =====

tests2 = ["item1: alpha; item2: beta. item3 - gamma--",
"item1: alpha; item3 - gamma--"]

def test_re(regex):
    r = re.compile(regex, re.MULTILINE)
    for test in tests2:
        res = r.search(test)
        if res:
            print res.groups()
        else:
            print "Failed"

==== end python code ====

And a simple question:

Why does the first regex that follows successfully grab "beta", while
the second one doesn't?

In [131]: test_re(r"(?:item2: (.*?)\.)")
('beta',)
Failed

In [132]: test_re(r"(?:item2: (.*?)\.)?")
(None,)
(None,)

Shouldn't the '?' greedily grab the group match?

Thanks
Bill Mill
bill.mill at gmail.com


From nagle at animats.com  Fri Jan 19 22:34:13 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 20 Jan 2007 03:34:13 GMT
Subject: More M2Crypto issues
In-Reply-To: <YcKdnYrJ6MgX6izYnZ2dnUVZ_oydnZ2d@comcast.com>
References: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>
	<mailman.2887.1169173756.32031.python-list@python.org>
	<6u7sh.264$4H1.150@newssvr17.news.prodigy.net>
	<L_6dnVPmutZyhyzYnZ2dnUVZ_tSdnZ2d@comcast.com>
	<C7esh.21509$yC5.9079@newssvr27.news.prodigy.net>
	<YcKdnYrJ6MgX6izYnZ2dnUVZ_oydnZ2d@comcast.com>
Message-ID: <V4gsh.21521$yC5.6480@newssvr27.news.prodigy.net>

Heikki Toivonen wrote:
> John Nagle wrote:
> 
>>    OpenSSL version: "OpenSSL 0.9.7a Feb 19 2003"
> 
> 
> Hmm, I've never actually used that old OpenSSL myself, just assumed from
> the original author's notes that anything from 0.9.7 onward worked.
> Guess not. I am thinking of changing the requirements to state which one
> works... I think the oldest that I have personally tested may have been
> 0.9.7d.

    I think older versions were built with an older OpenSSL and an older
SWIG.  The SWIG preprocessor has some limitations which can cause
errors to be reported during the SWIG preprocessor phase.

    This problem in SWIG has hit other projects.  See

http://blog.gmane.org/gmane.comp.programming.swig.devel/month=20051201

where the Common LISP people had a similar problem.

					John Nagle


From bthom at cs.hmc.edu  Tue Jan  2 03:26:13 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Tue, 02 Jan 2007 00:26:13 -0800
Subject: doctesting
Message-ID: <7EC2DA1E-229B-4005-A1EC-7FBBC8586B20@cs.hmc.edu>

Hi,

I'd like to write a tester script that I can place in one place (say  
~/bin/python/tester.py) and then have it visible to me at the cmd- 
line (by setting the path  variable appropriately). I have had no  
luck in getting it to work, however.

It appears like the doctest code itself assumes that all modules to  
be imported lie in some directory other than the one I invoked the  
tester.py script from. In particular, simple imports in a .txt file  
like:

   >>> import foo

fail even though I've started the script in a directory that contains  
file foo.py

I only achieve success when I manually copy tester.py into this same  
directory (symlinks don't fix the problem).

This is a real drag b/c it means I have to copy this tester.py  
routine into _every_ directory that contains a .txt python unit test  
file. From a code-reuse point of view, this is pretty hideous...

Advice appreciated,

--b


From srikrishnamohan at gmail.com  Tue Jan 23 14:17:43 2007
From: srikrishnamohan at gmail.com (km)
Date: Wed, 24 Jan 2007 00:47:43 +0530
Subject: best package for a physical simulation?
In-Reply-To: <ep5meg$ap9$1@sea.gmane.org>
References: <mailman.9299.1169555288.32030.python-list@python.org>
	<60915.195.220.102.78.1169558458.squirrel@mailgate.phys.ens.fr>
	<ep5meg$ap9$1@sea.gmane.org>
Message-ID: <f4cc03640701231117q6cd3c2acu76f717de10fa8f40@mail.gmail.com>

Hi,

checkout MMTK package
http://dirac.cnrs-orleans.fr/MMTK/

regards,
KM

On 1/24/07, Robert Kern <robert.kern at gmail.com> wrote:
>
> sittner at lkb.ens.fr wrote:
> > Hello everyone,
> > i would like to use python to perform some simulation involving
> collisions
> > of colloidal particles.
> > which is the best package/engine to do that in python?
>
> What kind of numerical methods does such simulation require?
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless
> enigma
> that is made terrible by our own mad attempt to interpret it as though it
> had
> an underlying truth."
>   -- Umberto Eco
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070124/4c807abf/attachment.html>

From skip at pobox.com  Thu Jan 25 12:41:09 2007
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 25 Jan 2007 11:41:09 -0600
Subject: Python does not play well with others
In-Reply-To: <wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
	<1169726842.719104.304300@v45g2000cwv.googlegroups.com>
	<wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
Message-ID: <17848.60341.346203.660506@montanaro.dyndns.org>


    John> My main concern is with glue code to major packages.  The
    John> connections to OpenSSL, MySQL, and Apache (i.e. mod_python) all
    John> exist, but have major weaknesses.

I have no SSL experience or direct mod_python experience (I do use Myghty
effectively), but I have used MySQLdb extensively in multi-threaded
environments.  There is a Python database API (PEP 249).  As far as I know,
MySQLdb implements this API well.  I have personally never had problems.
Andy Dustman, the author of the package is quite responsive to requests
raised in the mysql-python forums on SourceForge
(http://sourceforge.net/forum/?group_id=22307).  If you have problems with
MySQLdb, bring them up there.  I'm sure Andy will respond.

Skip


From pavlovevidence at gmail.com  Sat Jan 27 09:58:04 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 27 Jan 2007 06:58:04 -0800
Subject: assertions to validate function parameters
In-Reply-To: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
References: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
Message-ID: <1169909883.944892.74390@k78g2000cwa.googlegroups.com>



On Jan 25, 11:54 am, Matthew Wilson <m... at tplus1.com> wrote:
> Lately, I've been writing functions like this:
>
> def f(a, b):
>
>     assert a in [1, 2, 3]
>     assert b in [4, 5, 6]
>
> The point is that I'm checking the type and the values of the
> parameters.
>
> I'm curious how this does or doesn't fit into python's duck-typing
> philosophy.

The duck-typing thing fits into a wider philosophy of being liberal in 
what you accept.  As you're constraining what a function accepts, it 
definitely goes against the philosophy.  I suggest you not blindly 
slap assertions on every single function.

Assertions should only be used to check for ostensibly impossible 
conditions.  Therefore, guarding arguments like this is probably only 
a good idea for internal or private functions that you can personally 
guarantee will only be called with the right values.

Personally, I find assertions are more helpful in complex situtations 
where I find myself having to maintain some sort of invariant.  Some 
condition is supposed to always be true at this point, and my code 
relies on this.  I've taken steps to maintain the invariant, but I 
could have made a mistake.  So I throw an assertion in.  If there's a 
leak somewhere, it will catch it.


> I find that when I detect invalid parameters overtly, I spend less time
> debugging.

If it helps go ahead an use them.  The world won't end if you use an 
assertion in a less than ideal situation.  And, after all, if someone 
doesn't like it they can shut them off.


> Are other people doing things like this?  Any related commentary is
> welcome.

Well,  there are examples of this usage of assert the standard 
library.  Some public functions (off hand I can think of the threading 
module) use assertions to check for invalid arguments, a use I highly 
disagree with.  The library shouldn't be making assertions on behalf 
of the users.  If an AssertionError is raised from the threading 
module, it should be because there is a bug in the threading module, 
not because the user passed it a bad value.

But, yes, it has been done.


Carl Banks



From wanjunfeng at gmail.com  Tue Jan 16 01:47:48 2007
From: wanjunfeng at gmail.com (Kevin Wan)
Date: 15 Jan 2007 22:47:48 -0800
Subject: I wrote a C++ code generator in Python,
	would anyone please help me to review the code? :)
Message-ID: <1168930067.970099.164620@s34g2000cwa.googlegroups.com>

fgen is a free command line tool that facilitates cross platform c++
development, including header generation, cpp file generation, makefile
generation, unit test framework generation, etc.

http://sf.net/projects/fgen

I'm not very familiar with Python. Any feedback are appreciated! Or
anyone like to develop it with me?

Thanks.



From DustanGroups at gmail.com  Wed Jan 31 07:48:57 2007
From: DustanGroups at gmail.com (Dustan)
Date: 31 Jan 2007 04:48:57 -0800
Subject: another newbie question: why should you use "*args" ?
In-Reply-To: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
References: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
Message-ID: <1170247737.232403.114850@k78g2000cwa.googlegroups.com>

On Jan 31, 5:41 am, stef <s.mien... at id.umcn.nl> wrote:
> why should I use *args,
> as in my ignorance,
> making use of a list (or tupple) works just as well,
> and is more flexible in it's calling.

Others have mentioned the instances in which it's actually useful -
for catch-all arguments. But you also should take into consideration
the aesthetics, since python is supposed to be an aesthetically nice
language.

> So the simple conclusion might be: never use "*args",
> or am I overlooking something ?
>
> # method 1
>     def execute (self, *args):
>         for i in range ( len(args) ):
>             ... do something
>
> # method 2
>     def chunk_plot(self, list):
>         for i in range ( len(list) ):
>              .... do something

It's bad practice to use built-ins like 'list' as a regular variable
name.

> # calling method 1:
> execute (S[0], S[4] )
>
> # calling method 2:
> execute ( ( S[0], S[4] ) )

Let's take a look at those side-by-side:
execute (S[0], S[4] )
execute ( ( S[0], S[4] ) )

Now, which one *looks* better?

> # or *the extra flexibility)
> mylist = ( S[0], S[4] )
> execute ( mylist )

Also, take into consideration the opposite end of the pole; you have
your list of arguments (args), and your about to call a function that
was declared something like this:
def someFunction(arg1, arg2, arg3):
  # etc.
Which is clearer?
someFunction(*args)
someFunction(args[0], args[1], args[2])

And if you've got a variable number of arguments, it becomes virtually
impossible to avoid using the *args syntax.

And that doesn't even begin to cover the need for **kargs! (which, if
you haven't noticed, is generally used next to *args)

It turns out that it's not really necessary in a static-typed language
like java (although java 5.0 introduced it); it's the dynamic nature
of python that makes these syntactic sugars necessary. And without
them, function calls can get really ugly.

> thanks,
> Stef Mientki



From bignose+hates-spam at benfinney.id.au  Wed Jan 17 15:27:28 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 18 Jan 2007 07:27:28 +1100
Subject: Conflicting needs for __init__ method
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<mailman.2741.1168898073.32031.python-list@python.org>
	<pan.2007.01.16.03.02.03.4711@REMOVEME.cybersource.com.au>
	<740c3aec0701160837r33340866w5ddef3e09a0de537@mail.gmail.com>
	<873b6abp12.fsf@benfinney.id.au>
	<740c3aec0701170103k29c17df9xdb8c32a3a878ac00@mail.gmail.com>
	<87r6tu80kl.fsf@benfinney.id.au> <20070117144339.GL1906@loki>
Message-ID: <87mz4h8klr.fsf@benfinney.id.au>

Chuck Rhode <CRhode at LacusVeris.com> writes:

> Ben Finney wrote:
>
> > I recommend, instead, separate factory functions for separate
> > input types.
>
> Uh, how 'bout separate subclasses for separate input types?

The resulting object in each case would be the same type ('Rational'),
with the same behaviour. Subclassing would make sense only if the
resulting objects needed to have different behaviour in each case.

-- 
 \             "The power of accurate observation is frequently called |
  `\     cynicism by those who don't have it."  -- George Bernard Shaw |
_o__)                                                                  |
Ben Finney



From carsten at uniqsys.com  Mon Jan  1 15:53:44 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 01 Jan 2007 15:53:44 -0500
Subject: Missing erf()
In-Reply-To: <17816.3619.126136.486222@montanaro.dyndns.org>
References: <1167592158.085766.45140@48g2000cwx.googlegroups.com>
	<17816.3619.126136.486222@montanaro.dyndns.org>
Message-ID: <1167684824.3550.8.camel@localhost.localdomain>

On Sun, 2006-12-31 at 13:23 -0600, skip at pobox.com wrote:
>     rrenaud> Is there a reason why erf() is not included in the math
>     rrenaud> package?  According to the following URL it looks like it has
>     rrenaud> been standard C since 1999.
> 
> Python is implemented in the C89 dialect.  Maybe Python 3.0 will be
> implemented using C99.

In the meantime, you could:

1) Patch mathmodule.c to add the missing function(s), or
2) Make a small extension module that exposes the missing function(s),
or
3) Use ctypes to access libm directly. Something along the lines of
this:

>>> from ctypes import *
>>> libm = CDLL("libm.so")
>>> libm.erf.restype = c_double
>>> libm.erf(c_double(0))
0.0
>>> libm.erf(c_double(1))
0.84270079294971489
>>> libm.erf(c_double(2))
0.99532226501895271

Hope this helps,

Carsten.




From bdesth.quelquechose at free.quelquepart.fr  Sat Jan  6 09:57:48 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 06 Jan 2007 15:57:48 +0100
Subject: Pausing for Python Interpreter error messages...
In-Reply-To: <1168058097.855006.229820@s80g2000cwa.googlegroups.com>
References: <1168058097.855006.229820@s80g2000cwa.googlegroups.com>
Message-ID: <459fb2b6$0$324$426a74cc@news.free.fr>

redefined.horizons at gmail.com a ?crit :
> I've written a few classes that I have been testing in IDLE. However,
> every time I make a change to the classes based on the testing I have
> to walk through all he steps of preparing the classes for testing
> again.
> 
> So I wrote a script that does all the set-up work for me. 

You may want to have a look at the unittest module then:
http://docs.python.org/lib/module-unittest.html

> The only
> problem is when I run this script using the Python interpreter I can't
> get the command prompt to stay up long enough for me to read the
> message.
> 
> How do I get the command prompt to stay up?

first open the "command prompt", then launch your script from the 
command prompt.

> Is there a way to run my
> script and view the error message in IDLE?

menu run->run module, or just hit the F5 key.

> Thanks for the help.
> 
> Scott Huey
> 
> P.S. - I'm using Windows XP with the latest Python 2.3.
> 

Python 2.3 is years old. Latest is 2.5.


From adamgarstang at googlemail.com  Mon Jan 15 18:47:45 2007
From: adamgarstang at googlemail.com (Adam)
Date: 15 Jan 2007 15:47:45 -0800
Subject: Anyone has a nice "view_var" procedure ?
In-Reply-To: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
References: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
Message-ID: <1168904865.253014.210140@m58g2000cwm.googlegroups.com>


Stef Mientki wrote:

> hello,
>
> Is there some handy/ nice manner to view the properties of some variable ?
> As a newbie, I often want to see want all the properties of a var,
> and also some corner values (large arrays) etc.
>
> Probably it's not so difficult,
> but I don't see how to distinguish for example between a string and an
> array. An array has a shape, a string not etc.
>
>
> thanks,
> Stef Mientki

I am also a newbie so if this is not what you want I can't give much
more as of yet.

You can use type() to check what a Variable is. Usage:
#-------------Python Code-----------------------------
>>> aVar = ["zero", 1, float(2)]
>>> type(aVar)
<type 'list'>
>>> type(aVar[0])
<type 'str'>
>>> type(aVar[1])
<type 'int'>
>>> type(aVar[2])
<type 'float'>
>>> if type(aVar[1]) == int:
	print "test"

test
#-----------------End Code-------------------------------


There are also  function like len(). Usage:
#-------------Python Code-----------------------------
>>> len(aVar)
3
>>> len(aVar[0])
4
#-----------------End Code-------------------------------

Hope this helps.
Adam



From nagle at animats.com  Wed Jan 24 23:43:27 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 25 Jan 2007 04:43:27 GMT
Subject: Catching floating point errors from linked C code
In-Reply-To: <1169696243.262973.188540@s48g2000cws.googlegroups.com>
References: <1169696243.262973.188540@s48g2000cws.googlegroups.com>
Message-ID: <PzWth.22651$yC5.11156@newssvr27.news.prodigy.net>

John Pye wrote:
> Hi all
> 
> I have some C code that is giving me some 'nan' values in some
> calculations.  The C code is wrapped using SWIG to give me a Python
> module that I am then exercising through a unittest suite.
> 
> It seems that I should expect the C code to throw floating point
> exceptions (SIGFPE) and either the whole thing to abort, or for Python
> to catch the errors and report them. Instead I'm getting neither. I
> want to be able to track down the exact location of problems in my C
> code.
> 
> Is there something that Python does to turn on/off the catching of
> divide-by-zero errors, eg by manipulating <signal.h> signal handlers
> and/or <fenv.h> settings?

    What platform are you on?

    Python is probably running with floating point exceptions disabled,
but you can enable them in your C code, and restoring the floating
point mode when you leave, if you want.  This is probably
only worth doing under a debugger, because otherwise you just end
up with an aborted instance of Python.

				John Nagle


From robert.kern at gmail.com  Tue Jan 23 19:59:03 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 23 Jan 2007 18:59:03 -0600
Subject: Simple Matrix class
In-Reply-To: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>
Message-ID: <ep6b0p$mlr$1@sea.gmane.org>

Paul McGuire wrote:
> I've posted a simple Matrix class on my website as a small-footprint
> package for doing basic calculations on matrices up to about 10x10 in
> size (no theoretical limit, but performance on inverse is exponential).

Why is that? A simple and robust LU decomposition should be no more than O(n**3).

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From ptmcg at austin.rr.com  Mon Jan 29 04:51:42 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 29 Jan 2007 01:51:42 -0800
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
Message-ID: <1170064302.264009.12650@p10g2000cwp.googlegroups.com>

On Jan 28, 10:58 pm, "NoName" <zaz... at gmail.com> wrote:
> Perl:
> @char=("A".."Z","a".."z",0..9);
> do{print join("", at char[map{rand @char}(1..8)])}while(<>);
>
> !!generate passwords untill U press ctrl-z
>
> Python (from CookBook):
>
> from random import choice
> import string
> print ''.join([choice(string.letters+string.digits) for i in
> range(1,8)])
>
> !!generate password once :(
>
> who can write this smaller or without 'import'?

from random import choice
pwdchars = ''.join(chr(c) for c in range(ord('a'),ord('z')+1)+
                    range(ord('A'),ord('Z')+1)+
                     range(ord('0'),ord('9')+1) )

while(True) : print ''.join(choice(pwdchars) for i in range(8))


(Note that you want to use range(8), not range(1,8), since range gives 
you the values [a,b) if two arguments are given, or [0,a) if only one 
is given, and it appears that you want 8-character passwords.)

But really, there's nothing wrong with using import, and reusing known 
good code from the string module is better than reimplementing it in 
new code as I have done (less code === fewer opportunities for bugs).  
rand is not a built-in as it apparently is in Perl, but random is part 
of the core library, so all Python installs will have it available - 
likewise for string.

-- Paul



From rzantow at gmail.com  Sat Jan  6 16:55:45 2007
From: rzantow at gmail.com (rzed)
Date: Sat, 06 Jan 2007 16:55:45 -0500
Subject: still struggling, howto use a list-element as a name ?
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
	<Xns98B0968123CFErzantowgmailcom@208.49.80.253>
	<182cf$45a00556$d443bb3a$17174@news.speedlinq.nl>
Message-ID: <Xns98B0AC367AAF2rzantowgmailcom@208.49.80.253>

Stef Mientki <S.Mientki-nospam at mailbox.kun.nl> wrote in news:182cf
$45a00556$d443bb3a$17174 at news.speedlinq.nl:

>>> class Power_Supply(device):
>>>      pinlist = {
>>>          0: ('GND', _DIG_OUT, _par2),
>>>          1: ('VCC', _DIG_OUT, _par33)
>>>          }
>> 
>> I may be confused about what you're after, but wouldn't 
something 
>> like this work? (I don't know what a _par2 object is; I've 
named 
>> it something here.)
> _par2, is just (a reference to) a constant
>> 
>> class Power_Supply(device):
>>     def __init__(self):
>>         self.pin = {
>>             0:dict(Name='GND',Value=_DIG_OUT,something=_par2),
>>             1:dict(Name='VCC',Value=_DIG_OUT,something=_par33),
>>         }
> Why so complex, I need 10 or more parameters (or empty),
> and then this becomes completely unreadable.
> As this is part of the "user interface",
> (I want that completely unknown with Python people,
> write these lines),
> I think my "pinlist" is much easier.
> 

Whatever works for you. In your original example, you first 
created "pinlist" (which is actually a Python dict), and then used 
it to place values in an unspecified type named "pin" (which I 
took to be another dict). I just combined the two steps.

You talk about the "pinlist" being easier ... I'm not sure what 
you mean. Easier to create? Maybe. But if you are then going to 
assign the values to names, then it doesn't strike me as easier to 
go through the two-step process. But as I said, I may be confused 
about what you are really trying to do.

> 
>>         for k in self.pin.keys():
>>             self.__dict__[self.pin[k]['Name']] = self.pin[k]
> thanks "rzed" ?,
> that is exactly what I was looking for:
>                self.__dict__[self.pinlist[k][0]] = self.pin[k]

I'm glad it helped.

-- 
rzed


From sjmachin at lexicon.net  Sun Jan  7 20:06:10 2007
From: sjmachin at lexicon.net (John Machin)
Date: 7 Jan 2007 17:06:10 -0800
Subject: Working with Excel inside Python
References: <1168205727.130771.257030@51g2000cwl.googlegroups.com>
	<LHeoh.407$uL1.363@newsfe22.lga>
Message-ID: <1168218370.688414.171150@s80g2000cwa.googlegroups.com>

gblais at cox.net wrote:
> Or, you might want to look at two packages:
>
> xlrd
>
> pyExcelerator
>
> The first can "read" .xls files, and the second can write them.  I've had
> great results with both.
>

Hi Gerry,

Thanks for the testimonial for xlrd :-)

However I don't understand how a reasonable solution to the OP's
requirement (translate a tab-separated file to a DBF file with a bit of
slicing and dicing on the way) would have anything to do with .xls
files, or  Excel, or VB ...

Cheers,
John



From horpner at yahoo.com  Mon Jan  8 13:57:16 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 8 Jan 2007 19:57:16 +0100
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
	<%Isoh.22447$X97.12337@newsfe18.lga>
	<slrneq4nqc.k8.horpner@FIAD06.norwich.edu>
	<pjvoh.192$cQ2.1@read3.inet.fi>
Message-ID: <slrneq553q.ds.horpner@FIAD06.norwich.edu>

On 2007-01-08, Jussi Salmela <tiedon_jano at hotmail.com> wrote:
> Neil Cerutti kirjoitti:
>> In C one uses the pointer to opaque struct idiom to hide data.
>> For example, the standard FILE pointer.
>
> To Neil Cerutti: If a programmer in C has got a pointer to some
> piece of memory, that piece is at the mercy of the programmer.
> There's no data hiding at all in this case.

That's somewhat disingenuous. You get just as much data hiding
with an opaque data type in C as you get in C++ or Java.

-- 
Neil Cerutti
Potluck supper: prayer and medication to follow. --Church Bulletin Blooper


From edquichan at yahoo.com  Thu Jan 18 14:01:17 2007
From: edquichan at yahoo.com (EdG)
Date: 18 Jan 2007 11:01:17 -0800
Subject: Traversing the properties of a Class
In-Reply-To: <slrneqvgtv.r0.horpner@FIAD06.norwich.edu>
References: <1169141253.332211.12790@38g2000cwa.googlegroups.com>
	<slrneqvgtv.r0.horpner@FIAD06.norwich.edu>
Message-ID: <1169146877.454130.96550@s34g2000cwa.googlegroups.com>

Thanks.

Neil Cerutti wrote:
> On 2007-01-18, EdG <edquichan at yahoo.com> wrote:
> > For debugging purposes, I would like to traverse the class
> > listing out all the properties.
>
> This is the first thing that came to mind.
>
> def show_properties(cls):
>   for attr in dir(cls):
>     if isinstance(getattr(cls, attr), property):
>       print attr
>
> --
> Neil Cerutti
> 
> -- 
> Posted via a free Usenet account from http://www.teranews.com



From horpner at yahoo.com  Wed Jan 17 07:42:52 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 17 Jan 2007 13:42:52 +0100
Subject: A note on heapq module
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<45ad0f6c$1@nntp0.pdx.net>
	<1168982702.903306.152940@m58g2000cwm.googlegroups.com>
Message-ID: <slrneqs6j1.l0.horpner@FIAD06.norwich.edu>

On 2007-01-16, bearophileHUGS at lycos.com
<bearophileHUGS at lycos.com> wrote:
> Scott David Daniels:
>> I'd suggest some changes.  It is nice to have Heaps with equal
>> contents equal no matter what order the inserts have been
>> done. Consider how you want Heap([1, 2, 3]) and Heap([3, 1,
>> 2]) to behave. Similarly, it is nice to have str and repr
>> produce canonical representations (I would skip the __str__
>> code, myself, though). Also, subclasses should get their
>> identities tweaked as so:
>
> My version was a *raw* one, just an idea, this is a bit better:
> http://rafb.net/p/nLPPjo35.html
> I like your changes. In the beginning I didn't want to put
> __eq__ __ne__ methods at all, because they are too much slow,
> but being them O(n ln n) I think your solution is acceptable.
>
> Some methods may have a name different from the heap functions:
> def smallest(self):
> def push(self, item):
> def pop(self):
> def replace(self, item):
>
> Two things left I can see: I think the __init__ may have a
> boolean inplace parameter to avoid copying the given list, so
> this class is about as fast as the original heapify function
> (but maybe such thing is too much dirty for a Python stdlib):

One more idea, cribbed from the linked list thread elsewhere: it
might be nice if your Heap could optionally use an underlying
collections.deque instead of a list.

I don't know how excellent Python's deque is, but it's possible a
deque would provide a faster heap than a contiguous array. C++'s
std::deque is the default implementation of C++'s
std::priority_queue for that reason (unless I'm confused again).

-- 
Neil Cerutti
We will sell gasoline to anyone in a glass container. --sign at Santa Fe gas
station


From fsck_spam at telenet.be  Wed Jan 17 14:06:47 2007
From: fsck_spam at telenet.be (Rikishi 42)
Date: Wed, 17 Jan 2007 20:06:47 +0100
Subject: Making a simple script standalone
References: <5d1084-5j7.ln1@whisper.very.softly>
	<eojmnv$18p$1@zinnia.noc.ucla.edu>
Message-ID: <7n8284-od9.ln1@whisper.very.softly>

On Wednesday 17 January 2007 00:22, James Stroud wrote:

>> There is nothing graphical, nothing fancy about the script.
>> The only imports are: os, stat, string and time.
>> 
>> Any suggestions on an - easy and clear - path to follow ?
> 
> 
> pyinstaller + innosetup.

I will look into it, thanks!
Hope it's not as heavy as with py2exe...

-- 
Research is what I'm doing, when I don't know what I'm doing.
(von Braun)



From nmm1 at cus.cam.ac.uk  Thu Jan 18 17:43:26 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 18 Jan 2007 22:43:26 GMT
Subject: How to find out if another process is using a file
References: <eoo6vd$33u$1@gemini.csx.cam.ac.uk>
	<mailman.2878.1169141728.32031.python-list@python.org>
	<donn-66A101.12021118012007@gnus01.u.washington.edu>
	<eookeb$1ar$1@gemini.csx.cam.ac.uk>
	<donn-DA887B.14263518012007@gnus01.u.washington.edu>
Message-ID: <eoot6e$hop$1@gemini.csx.cam.ac.uk>


In article <donn-DA887B.14263518012007 at gnus01.u.washington.edu>,
Donn Cave <donn at u.washington.edu> writes:
|> > |> 
|> > |> O_EXCL fails if the file exists at all - whether closed or open.
|> > 
|> > Yes.  In theory.  In practice, it usually works on normal files, provided
|> > that all opens are local.  Under some circumstances, it will even work
|> > for NFS mounted files, as far as I recall.
|> 
|> Mm, by "fail", I meant
|> 
|> An attempt to open with O_EXCL set will "fail" if the file exists at all,
|> i.e., the file will not be opened, a negative value will be returned,
|> and errno will be set to EEXIST.
|> 
|> What I neglected to mention is that this effect obtains when O_EXCL
|> is used in combination with O_CREAT.  Without O_CREAT, O_EXCL doesn't
|> mean anything and is ignored.
|> 
|> If there is any significant difference between theory and practice
|> in this matter, it's news to me.

Actually, it is undefined behaviour in POSIX, and I have used a Unix
where O_EXCL on its own failed if the file existed (of course, it also
failed if it DIDN'T exist, because of the lack of O_CREAT).  I can't
remember which - perhaps AIX or OSF/1 (not DEC).

But I was referring to a different problem.  Some remote and parallel
filing systems handle such things very badly, and it is often possible
to create a file even if it exists and O_CREAT|O_EXCL is set.  A similar
remark applies to 'special' files, even on fairly mainstream, local
filing systems.


Regards,
Nick Maclaren.


From rzantow at gmail.com  Sat Jan 20 08:57:37 2007
From: rzantow at gmail.com (rzed)
Date: Sat, 20 Jan 2007 08:57:37 -0500
Subject: OT Annoying Habits (Was: when format strings attack)
References: <mailman.2916.1169240529.32031.python-list@python.org>
	<pan.2007.01.20.02.22.52.492763@REMOVE.THIS.cybersource.com.au>
	<01bc01c73c5f$75e8cfe0$03000080@hendrik>
	<mailman.2941.1169295400.32031.python-list@python.org>
Message-ID: <Xns98BE5B268D285rzantowgmailcom@208.49.80.253>

Dane Jensen <careo at fastmail.fm> wrote in
news:mailman.2941.1169295400.32031.python-list at python.org: 

> On Friday 19 January 2007 22:51, Hendrik van Rooyen wrote:
>> "Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> wrote:
>> > Or perhaps I should say:
>> >
>> > .snoitnevnoc
>> > hsilgnE tpada )ylbissop revenehw( dluohs ew os dna ,naitraM
>> > ton ,puorgswen egaugnal hsilgnE na no er'ew ,segaugnal hcus
>> > era ereht fi neve tuB
>>
>> First I thought it was Welsh or Cornish or something.
>>
>> Then it was like being in my first year of school again-
>> reading letter by letter.  Never realised how difficult it is.
>>
>> I suppose it will improve with practice.
> 
> Not to steer this topic even futher off topic, but this is
> something that's been on my mind lately...
> 
> The biggest problem with it that the letters were forwards and
> not also backwards (and the parens). But then, it's my
> understanding that as a left-handed person, reading and writing
> backwards is far easier for me than for the majority that is
> right-handed. Have any other lefties found that the case? 

How would anybody know? As a left-hander, I have found it easy 
enough to read backwards, but then, being left-handed forces a 
certain habit of adaptability in any case. Maybe that makes it 
easier to read backward, but that is not a task I'm often called 
on to do. It takes practice regardless.

This subthread reminds me of my *highly secure* plaintext 
encryption system that would render the sentence

<But even if there are such languages, we're on an English 
language newsgroup, not Martian, and so we should (whenever 
possibly) adapt English conventions>

as 

<Sno itne vn ochsi lgn etpa daylbisso, pr'ev en eh Wdluohs 
ewosdnan aitramton, puo Rgswene, gau gn al hsilgn (enanoere 
wsegaugn) alhcu Seraere htfinevetub>

I think it looks vaguely Esperantonic (Esperantoid? Esperantic?), 
if anything. 

-- 
rzed


From S.Mientki-nospam at mailbox.kun.nl  Thu Jan 18 17:24:20 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Thu, 18 Jan 2007 23:24:20 +0100
Subject: Anyone has a nice "view_var" procedure ?
In-Reply-To: <mailman.2857.1169076197.32031.python-list@python.org>
References: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>	<1168904865.253014.210140@m58g2000cwm.googlegroups.com>	<8ab5f$45ad5c12$d443bb3a$7243@news.speedlinq.nl>	<mailman.2823.1169032836.32031.python-list@python.org>	<5d831$45aea748$d443bb3a$26464@news.speedlinq.nl>
	<mailman.2857.1169076197.32031.python-list@python.org>
Message-ID: <3feaf$45aff382$d443bb3a$12046@news.speedlinq.nl>

thanks Gabriel

> str(key)[7:-2] => key.__name__

I didn't know that one

> Nice to see you built a useful tool! It's a great way to learn a language.

Yes, and this group is helping me a whole lot, thanks !

cheers,
Stef Mientki



From wescpy at gmail.com  Fri Jan 12 17:56:16 2007
From: wescpy at gmail.com (wesley chun)
Date: Fri, 12 Jan 2007 14:56:16 -0800
Subject: ANN: Python training course, Feb 7-10, San Francisco
Message-ID: <78b3a9580701121456n7a8667d3odab40257532e0ed5@mail.gmail.com>

apologies to all... this is the Intro course, not Advanced as the orig
subject line stated, and it takes place Feb 7-9, 2007.


On 1/12/07, wesley chun <wescpy at gmail.com> wrote:
> FINAL REMINDER... we still have some seats left!
>
> What:   (Intensive) Intro to Python
> When:  February 7-9, 2007
> Where: San Francisco (SFO/San Bruno), CA, USA
> Web:    http://cyberwebconsulting.com (click "Python Training" link)


From grante at visi.com  Fri Jan  5 10:16:09 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 05 Jan 2007 15:16:09 -0000
Subject: program deployment
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
Message-ID: <12psqtppgi5cme6@corp.supernews.com>

On 2007-01-05, king kikapu <aboudouvas at panafonet.gr> wrote:

>> Python code is normally deployed as straight source code.
>
> But isn't this a problem of its own? I mean, many people do not feel
> good if the know that their source code is lying around on other
> machines...

Are they embarassed by their code?

-- 
Grant Edwards                   grante             Yow!  Can I have an IMPULSE
                                  at               ITEM instead?
                               visi.com            


From deets at nospam.web.de  Sat Jan 13 15:18:05 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 13 Jan 2007 21:18:05 +0100
Subject: sqlobject 0.8.0b1 and python 2.5
In-Reply-To: <mailman.2691.1168697941.32031.python-list@python.org>
References: <mailman.2691.1168697941.32031.python-list@python.org>
Message-ID: <50st46F1hiu23U1@mid.uni-berlin.de>

Daniel Nogradi schrieb:
> Hi list,
> 
> I get loads of DeprecationWarnings while using sqlobject 0.8.0b1 with
> python 2.5. Does this mean that the sqlobject project is not very up
> to date? Or should I just ignore them and happily use it? In general,
> what's the status of sqlobject, will it be dropped altogether after
> sqlobject2 is out?

To my knowledge, the 0.8.x series is the current line of development, 
and has made major progress over the previous versions. What makes you 
think it will be stopped developing? And where does a sqlobject2 come from?

Regarding the warnings: I presume pretty much projects will have these, 
cleaning up a code base, especially when the code is supposed to work 
with python versions down to 2.2 is a major task, not do be done to 
lightheartedly so to not risk introduction of errors.

Diez


From joshua at eeinternet.com  Thu Jan 11 20:08:45 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Thu, 11 Jan 2007 16:08:45 -0900
Subject: Doing date/time + TZ math in python
References: <459ee41c$0$4805$88260bb3@free.teranews.com>
	<1168123983.983339.163010@s80g2000cwa.googlegroups.com>
Message-ID: <45a6d2eb$0$4777$88260bb3@free.teranews.com>

wittempj at hotmail.com wrote:

>> The problem is, how do I create a datetime object and tell it that it's
>> America/Anchorage *daylight savings time* instead of whatever the system
>> is
>> currently set at?  pytz only has America/Anchorage, and I saw no way to
>> tell it explicitly that the timezone is in Daylight instead of Standard
>> time (e.g. using AKST vs. AKDT for the time zone).
>>
>> I'm sure there is a way to do it, and I'm sure it's quite simple, but it
>> hasn't jumped out at me yet.  Is there a module that I haven't seen that
>> would be better suited for this?
> 
> It looks like3 you're 9 hours in this example:
> http://docs.python.org/lib/datetime-tzinfo.html, see e.g.
> http://www.worldtimezone.com/index12.php

Right, I know I'm at GMT-9, and tzinfo correctly deduces that when it
creates an object.  But what if I were currently at GMT-8 (my time zone on
daylight savings time) and I was importing data created during standard
time?  How would I create an object and tell it this is America/Anchorage
on standard time, or conversely, how would I right now create and object
and tell it to use daylight time?  In other words, how can I explicitly
specify whether or not the time object being created is daylight savings
time or not?  I did not see that option in the documentation reading I did.

Thanks!

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From rhamph at gmail.com  Mon Jan 15 15:48:13 2007
From: rhamph at gmail.com (Rhamphoryncus)
Date: 15 Jan 2007 12:48:13 -0800
Subject: Maths error
In-Reply-To: <eoffvh$cfv$1@gemini.csx.cam.ac.uk>
References: <mailman.2480.1168350033.32031.python-list@python.org>
	<eoabbl$270$1@gemini.csx.cam.ac.uk>
	<mailman.2709.1168753952.32031.python-list@python.org>
	<eoffvh$cfv$1@gemini.csx.cam.ac.uk>
Message-ID: <1168894093.278546.209850@m58g2000cwm.googlegroups.com>

Nick Maclaren wrote:
> The problem with it is that it is an unrealistically pessimal model,
> and there are huge classes of algorithm that it can't handle at all;
> anything involving iterative convergence for a start.  It has been
> around for yonks (I first dabbled with it 30+ years ago), and it has
> never reached viability for most real applications.  In 30 years, it
> has got almost nowhere.
>
> Don't confuse interval methods with interval arithmetic, because you
> don't need the latter for the former, despite the claims that you do.
>
> |> For people just getting into it, it can be shocking to realize just how
> |> wide the interval can become after some computations.
>
> Yes.  Even when you can prove (mathematically) that the bounds are
> actually quite tight :-)

I've been experimenting with a fixed-point interval type in python.  I
expect many algorithms would require you to explicitly
round/collapse/whatever-term the interval as they go along, essentially
making it behave like a float.  Do you think it'd suitable for
general-use, assuming you didn't mind the explicit rounding?

Unfortunately I lack a math background, so it's unlikely to progress
past an experiment.



From jm.suresh at gmail.com  Thu Jan 11 05:26:40 2007
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 11 Jan 2007 02:26:40 -0800
Subject: dot operations
Message-ID: <1168511200.252193.132340@p59g2000hsd.googlegroups.com>

Hi,
 Frequently I get to do like this:
a = (1, 2, 3, 4) # some dummy values
b = (4, 3, 2, 1)
import operator
c = map(operator.add, a, b)

I am finding the last line not very readable especially when I combine
couple of such operations into one line. Is it possible to overload
operators, so that, I can use .+ for element wise addition, as,
c = a .+ b
which is much more readable.

Similarly, I want to use .- , .*, ./   . Is it possible to do?

thanks.

-
Suresh



From ddvlad at gmail.com  Sat Jan 27 04:10:13 2007
From: ddvlad at gmail.com (Vlad Dogaru)
Date: 27 Jan 2007 01:10:13 -0800
Subject: Convert String to list of chars
In-Reply-To: <11Duh.1840$G23.1501@newsreading01.news.tds.net>
References: <mailman.3226.1169882063.32031.python-list@python.org>
	<11Duh.1840$G23.1501@newsreading01.news.tds.net>
Message-ID: <1169889013.523506.256300@q2g2000cwa.googlegroups.com>

On Jan 27, 9:18 am, Neil Cerutti <horp... at yahoo.com> wrote:
> On 2007-01-27, juanef... at gmail.com <juanef... at gmail.com> wrote:
>
> > How can I convert a string to a char list?
> > for example
>
> > "hello" --> ['h','e','l','l','o']
>
> > I have been searching but I can't find my answers
> list("hello")

Wow, I've been using [c for c in 'hello'] for as long as I can remember
needing it. Thanks!

Vlad



From tubby at bandaheart.com  Thu Jan 18 20:02:31 2007
From: tubby at bandaheart.com (tubby)
Date: Thu, 18 Jan 2007 20:02:31 -0500
Subject: Determining when a file is an Open Office Document
Message-ID: <eop5ci$et5$1@solaris.cc.vt.edu>

Silly question, but here goes... what's a good way to determine when a 
file is an Open Office document? I could look at the file extension, but 
it seems there would be a better way. VI shows this info in the files:

mimetypeapplication/vnd.oasis.opendocument.textPK
mimetypeapplication/vnd.oasis.opendocument.presentationPK
etc.

Not really a Python specific question but, how do you guys do this sort 
of thing? I've figured out how to break out the content.xml file in the 
new OOo XML format, and do re searching and matching on that, now I just 
need a fast, reliable way to determine when I need to do that versus 
just reading the file.

Thanks,
Tubby


From vpolukcht at gmail.com  Mon Jan 22 09:55:15 2007
From: vpolukcht at gmail.com (Victor Polukcht)
Date: 22 Jan 2007 06:55:15 -0800
Subject: module check
Message-ID: <1169477715.178874.223290@51g2000cwl.googlegroups.com>

Can anybody suggest a correct way of checking in python module exists
and correctly installed from python program.



From kylotan at gmail.com  Thu Jan 11 06:43:53 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 11 Jan 2007 03:43:53 -0800
Subject: creating simple Python scripting interfaces via C++
In-Reply-To: <1168272267.679069.325890@38g2000cwa.googlegroups.com>
References: <1168272267.679069.325890@38g2000cwa.googlegroups.com>
Message-ID: <1168515833.590286.123330@o58g2000hsb.googlegroups.com>

Ok, my first attempt at this creates proxy objects in Python, and
stores a pointer to the C++ instance in the Python object. I cast that
pointer to an int and pass it as a single parameter to the object's
__init__ function.

static PyObject* Actor_init(PyObject *self, PyObject *args)
{
    PyObject* selfParam;
    PyObject* ptrValue;
    if (!PyArg_ParseTuple(args, "OO", &selfParam, &ptrValue))
        return NULL;

    PyObject_SetAttrString(selfParam, "_cpp_ptr", ptrValue);

    Py_INCREF(Py_None);
    return Py_None;
}

I have no idea why self is always NULL, when I'm calling the functions
as methods of an object. Any ideas why this is the case? For what it's
worth I attach each method via the PyMethodDef -> PyCFunction_New ->
PyMethod_New -> PyDict_SetItemString(classDict) route.

To get data back from the C++ object to Python, I extract that value
and cast it back to the appropriate pointer type.

static PyObject* Actor_showName(PyObject *self, PyObject *args)
{
    PyObject* selfParam;
    if (!PyArg_ParseTuple(args, "O", &selfParam))
        return NULL;

    PyObject* cppPtr = PyObject_GetAttrString(selfParam, "_cpp_ptr");
    long cppPtrVal = PyInt_AsLong(cppPtr);
    Actor* pActor = reinterpret_cast<Actor*>(cppPtrVal);

    // Delegate to the C++ object
    pActor->ShowName();

    Py_INCREF(Py_None);
    return Py_None;
}

I've omitted some error checking, but this is the way I'm going for
now. Are there any glaring errors I've made (apart from perhaps
assuming sizeof(pointer) <= sizeof(long), that is)? And is there
anywhere else more appropriate that I should be asking this question,
given the lack of responses to this and my other embedding topic so
far?

-- 
Ben Sizer



From george.sakkis at gmail.com  Mon Jan 29 13:36:38 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 29 Jan 2007 10:36:38 -0800
Subject: [Boost.Graph] graph.vertices property creates new objects
Message-ID: <1170095798.778605.30310@q2g2000cwa.googlegroups.com>

I've just started toying with the python bindings of BGL and I'm 
puzzled from the following:

>>> from boost.graph import Graph
>>> g = Graph()
>>> v = g.add_vertex()
>>> g.vertices.next() == v
True
>>> g.vertices.next() is v
False

It seems that the vertices iterator creates new vertex objects every 
time instead of iterating over the existing ones. This essentially 
prevents, among other things, storing vertices as keys in a dictionary 
since the hashes of the stored and the new vertex differ although they 
compare equal. Is this really what's happening, and if so, why ?

George



From cginboston at hotmail.com  Thu Jan  4 10:26:08 2007
From: cginboston at hotmail.com (Chaz Ginger)
Date: Thu, 04 Jan 2007 15:26:08 GMT
Subject: Packaging up a Python/Twisted Matrix application...
Message-ID: <k09nh.8951$0F1.6975@trnddc02>

I have a rather large Python/Twisted Matrix application that will be run 
on Windows, Linux and perhaps Macs. I was wondering if there are any 
tools that can be used to create an installer that will bring in Python, 
Twisted Matrix, my application libraries and anything else I need?

I have tried using ezsetup with no luck (it seems not everything can be 
installed with it). I was hoping to find something as nice (and 
complete) as Perl's CPAN but can't seem to find anything.

Does anyone have any recommendations?

Peace,
Chaz.


From researchbase at gmail.com  Fri Jan 19 08:30:33 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Fri, 19 Jan 2007 19:00:33 +0530
Subject: how to mimik a main() function to start a program with entry point?
Message-ID: <f81479dd0701190530j30d8c31fg2de680240329fb00@mail.gmail.com>

hello all.
I have one simple query and may be that's to stupid to answer but I am
not finding the answer any ways.
I have a set of modules in my package and out if which one is my
actual starting point to my entire program.  say for example I have an
entire database application ready and I want a main (as in java or c)
to initiate the program and may be bring up a login screen and then
pass the control on to the main window.
if I am giving raw source code that is easy because I will tell user
to run the command ./xyz.py which has that function.
but if I freze it into an executable with py2exe for example , how do
I solve this problem?
thanks.
Krishnakant.


From rossabri at hotmail.com  Tue Jan  9 18:12:45 2007
From: rossabri at hotmail.com (rossabri at hotmail.com)
Date: 9 Jan 2007 15:12:45 -0800
Subject: The trouble with sockets.... (fixing inheritance, etc.)
Message-ID: <1168384365.791194.179700@77g2000hsv.googlegroups.com>

This topic has been addressed in limited detail in other threads:

[1] "sockets don't play nice with new style classes :(" May 14 2005.
http://groups.google.com/group/comp.lang.python/browse_thread/thread/76d27388b0d286fa/c9849013e37c995b

[2] "Subclassing socket" Dec 20 2005 - Jan 14 2006.
http://groups.google.com/group/comp.lang.python/browse_thread/thread/391728cd442339c8/c0581b9ee5e7ceaf

Briefly, the socket module ("socket.py") provides a wrapper for python
extension code ("_socket.so","Modules/socketmodule.*" in the source)
that is built on top of the system socket library ("socket.h",etc).
This wrapper attempts to provide a SocketType we can instantiate and
treat as a typical Python object. It does this by forwarding some of
its function calls (send, recv, etc.) to an object that it references
as self._sock. This "delegation" pattern has been used in the past to
allow built-in types to be treated like normal types.

The problem is that, in this instance, delegation fails to maintain the
inheritance behavior that we expect from normal types. (See [1] and [2]
for examples.) My question is: What can be done about this?

The issue is somewhat complicated. It seems to me that the crux of the
problem is that sockets can spawn other sockets via the .dup and
.accept methods. These calls pass right down to the system level and
return references to objects of the built-in type (ie, _socket.socket)
to interpreted code. All the interpreted code can do it try to "cast"
(in the sense of Java) the object to a non-built-in type. If "newsock"
is a reference to a _socket.socket object, the socket module does this
by calling (notionally) "SocketType(_sock=newsock)". The new object of
type SocketType delegates to the object of type _socket.socket via
self._sock. Please see the source code for a clearer picture.

Now I'll have a little chat with myself.

Q1) Can't we just have _socket.socket.dup and _socket.socket.accept
return something of type(self) rather than type _socket.socket?
A1) I don't think you can "tell" the compiled code about what "type" of
PyObject to return. Maybe the Python gods will bless us with a complete
answer here.

Q2) Ok, so it looks like we are stuck with delegation at some level or
another then, huh?
A2) Well, yeah, but in some sense Python is all about delegating data
and operations to compiled code. It's just a matter of how and where.
We want to maintain a clear object model in the interpreted code and
push the dirty work down to compiled code. The problem is that in the
case of the socket module, the "how and where" are not obvious because
of the way the accept and dup system calls work.

Q3) Are you saying that the way that sockets work is fundamentally
different than the way other built-in objects work?
A3) Yeah, I guess I am. There aren't really any other built-ins that
can reach down to compiled code and spawn themselves like that. When
stuff like that happens in Python, it is usually handled with a copy,
deepcopy, or some kind of factory function. Sockets just do some things
that are hard to shoe-horn into a standard Python idiom.

The easiest solution to this problem is probably to fix the delegation
mechanism so that it transparently supports inheritance. The .accept
and .dup methods would pass a _socket.socket object into
type(self).__init__. Some __getattribute__ magic would likely be
involved. It's not immediately obvious to me how to do this, but my
intuition is that it can be done fairly painlessly.

The ideal solution is to redesign both the _socket and socket modules
so that we don't have to resort to delegation. However, due to the
argument that I have given, this will likely result in an interface
change. Interface changes are painful, yes, but at least things become
more pythonic.

What does the peanut gallery think? How should we go about fixing this
problem?



From arkanes at gmail.com  Thu Jan 25 09:09:06 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 25 Jan 2007 08:09:06 -0600
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <epa2dh$jl3$1@sea.gmane.org>
References: <45b6231b$1_2@news.bluewin.ch>
	<4866bea60701230724y3a51bc31p9970075f99b70d05@mail.gmail.com>
	<ep7qoe$jdg$1@sea.gmane.org>
	<4866bea60701240736v837d246w187ecb1ccb90eefd@mail.gmail.com>
	<epa2dh$jl3$1@sea.gmane.org>
Message-ID: <4866bea60701250609u61e72d30q21dd11c8c8fd9bcd@mail.gmail.com>

On 1/25/07, Boris Borcic <bborcic at gmail.com> wrote:
> Chris Mellon wrote:
> > On 1/24/07, Boris Borcic <bborcic at gmail.com> wrote:
> >> Chris Mellon wrote:
> >>> Using either win32 or wxPython you will be able to produce bitmaps
> >>> directly, without needing to create a visible window.
> >>>
> >>>
> >>> Some quick & dirty wxPython code
> >>>
> >>> def getTextBitmap(text, font, fgcolor, bgcolor):
> >>>     dc = wx.MemoryDC()
> >>>     dc.SetFont(font)
> >>>     width, height= dc.GetTextExtent(text)
> >>>     bmp = wx.EmptyBitmap(width, height)
> >>>     dc.SelectObject(bmp)
> >>>     dc.SetBackground(wx.Brush(bgcolor))
> >>>     dc.Clear()
> >>>     dc.SetTextBackground(bgcolor)
> >>>     dc.SetTextForeground(fgcolor)
> >>>     dc.DrawText(text, 0, 0)
> >>>     dc.SelectObject(wx.NullBitmap)
> >>>     return bmp
> >>>
> >>>
> >>> Raw win32 code will look similar but will be much more verbose.
> >> Thx again for this base.
> >>
> >> Quickly testing this, it appears that the result is rendered half a pixel off in
> >> the x-direction. Does this make sense ? Is it possible to position text with
> >> subpixel accuracy ?
> >>
> >
> > The GDI text api, which is what wx is wrapping here, only provides
> > pixel accuracy. You are probably seeing a kerning effect from your
> > chosen font and perhaps the effects of ClearType.
>
> I am not. Turning antialiasing off (as a desktop setting) changes the rendering
> but wx._gdi_ still insists that horizontal coordinates are between pixels (to
> the contrary of vertical coordinates). This means thin black vertical lines are
> rendered by two pixel columns, the left one red, the right one cyan.
> Non-aliased, 90-degree rotated text is still smeared likewise left-to-right on
> the screen what becomes top-to-bottom relative to the text. Setting the scales
> at 0.5 and drawing the text one pixel off (to express a half-pixel shift)
> doesn't work. A long almost vertical thin black line that's one pixel off
> top-to-bottom results in two parallel vertical uniformly colored red and cyan
> pixel columns, broken in the middle.
>
> In short, wx._gdi_ fights quite hard to enforce what I am trying to avoid :( I
> might admire its consistency if it extended to treating both axes similarly...
>

I have not recently had a need to examine drawn text output this
closely, but I am familiar with the C++ code that implements the
drawing and it's a direct wrapping of win32 GDI calls. If it's not
matching your source text, then the source may be drawn using a
different method or using one of the alternate engines, like GDI+.


From gagsl-py at yahoo.com.ar  Wed Jan 24 12:37:18 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 24 Jan 2007 14:37:18 -0300
Subject: sys.path issue in cygwin
In-Reply-To: <001501c73f8d$63edb590$14fd0179@WANGSHUHAO>
References: <001501c73f8d$63edb590$14fd0179@WANGSHUHAO>
Message-ID: <7.0.1.0.0.20070124143053.034d86b8@yahoo.com.ar>

At Wednesday 24/1/2007 04:58, Wang Shuhao wrote:

>To keep the question simple, I've set PATH= in cygwin.bat to avoid 
>python initialze sys.path from Windows' PATH environment.

The simple answer is that sys.path has nothing to do with the PATH 
environment variable.
sys.path is initialized from the location of the Python executable; 
PYTHONPATH can be used to prepend additional directories. You might 
set PYTHONHOME too, but for a standard installation its not needed - 
mainly for embedded interpreters where the running application is not 
python itself.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From jonc at icicled.net  Sat Jan  6 18:37:20 2007
From: jonc at icicled.net (Jonathan Curran)
Date: Sat, 6 Jan 2007 17:37:20 -0600
Subject: Traceback of hanged process
In-Reply-To: <1168123532.3498.51.camel@chopin>
References: <1168123532.3498.51.camel@chopin>
Message-ID: <200701061737.20605.jonc@icicled.net>

On Saturday 06 January 2007 16:45, Hynek Hanke wrote:
> Hello,
>
> please, how do I create a pythonic traceback from a python process that
> hangs and is not running in an interpreter that I executed manually
> or it is but doesn't react on CTRL-C etc? I'm trying to debug a server
> implemented in Python, so I need some analog of 'gdb attach' for C.
>
> Unfortunatelly, googling and reading documentation revealed nothing, so
> please excuse if this question is dumb.
>
> Thank you,
> Hynek Hanke

Hynek,
	It is possible to redirect stderr to a file so that in case of a crash or 
fault the errors will be logged to a file. I think the following code would 
do it.

import sys

log_file = open('errors.log', 'w')
sys.stderr = open('errors.log', 'w')

<your code>

log_file.close()

Hope it helps.

- Jonathan


From wuwei23 at gmail.com  Mon Jan 22 20:36:04 2007
From: wuwei23 at gmail.com (alex23)
Date: 22 Jan 2007 17:36:04 -0800
Subject: class explorer for automating IE
In-Reply-To: <1169454620.313191.263020@m58g2000cwm.googlegroups.com>
References: <1169448532.869501.190530@v45g2000cwv.googlegroups.com>
	<1169449585.832667.325370@11g2000cwr.googlegroups.com>
	<ep1pss$97i$02$1@news.t-online.com>
	<1169454620.313191.263020@m58g2000cwm.googlegroups.com>
Message-ID: <1169516164.311920.156730@51g2000cwl.googlegroups.com>

John wrote:
> The problem is that this does not run javascript code it seems.
> I got started with pamie, which seems to work till now.

Have you seen IEC? http://www.mayukhbose.com/python/IEC/index.php

I've used IEC and found it very straightforward. I had no call to test
its ability to handle javascript, but according to the site:  "Ability
to process Javascript and VBscript."

Hope this helps.

-alex23



From gagsl-py at yahoo.com.ar  Thu Jan 18 12:34:52 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 18 Jan 2007 14:34:52 -0300
Subject: How to find out if another process is using a file
References: <eoo6vd$33u$1@gemini.csx.cam.ac.uk>
Message-ID: <eoob3t$3jn$1@sea.gmane.org>

"Tom Wright" <tew24 at spam.ac.uk> escribi? en el mensaje 
news:eoo6vd$33u$1 at gemini.csx.cam.ac.uk...

> I'm writing a program which reads a series of data files as they are 
> dumped
> into a directory by another process.  At the moment, it gets sporadic bugs
> when it tries to read files which are only partially written.
>
> I'm looking for a function which will tell me if a file is opened in
> write-mode by another process - if it is, my program will ignore it for 
> now
> and come back to it later.  This needs to work on linux and windows.  Mac
> OS would be a bonus too.  An os-independent solution would be good, but I
> could write os-specific options and have it pick the appropriate one.

Use os.open with the O_EXCL flag; will fail if the other process has the 
file still open (and will fail if another process is reading the file, too, 
not just if someone is writing).

-- 
Gabriel Genellina 




From tleeuwenburg at gmail.com  Wed Jan 10 21:26:28 2007
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 10 Jan 2007 18:26:28 -0800
Subject: what is the idiom for copy lots of params into self?
In-Reply-To: <1168469214.452389.221180@p59g2000hsd.googlegroups.com>
References: <1168469214.452389.221180@p59g2000hsd.googlegroups.com>
Message-ID: <1168482387.968342.169880@i39g2000hsf.googlegroups.com>

def __init__(self, **kw):

   self.argdict = kw


Emin wrote:
> Dear Experts,
>
> When writing large classes, I sometimes find myself needing to copy a
> lot of parameters from the argument of __init__ into self. Instead of
> having twenty lines that all basically say something like self.x = x, I
> often use __dict__ via something like:
>
> class example:
>      def __init__(self,a,b,c,d,e,f,g,h,i,j,k,l,m,n):
>          for name in
> ['a','b','c','d','e','f','g','h','i','j','k','l','m','n']:
>              self.__dict__[name] = locals()[name]
>
> This saves a lot of code and makes it easier to see what is going on,
> but it seems like there should be a better idiom for this task. Any
> suggestions?
> 
> Thanks,
> -Emin



From jstroud at mbi.ucla.edu  Fri Jan 26 22:52:20 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 26 Jan 2007 19:52:20 -0800
Subject: Resizing widgets in text windows
In-Reply-To: <1169847315.631951.295830@a75g2000cwd.googlegroups.com>
References: <1169847315.631951.295830@a75g2000cwd.googlegroups.com>
Message-ID: <epei9l$7ej$1@zinnia.noc.ucla.edu>

deacon.sweeney at gmail.com wrote:
> Hi, I've been searching for a .resize()-like function to overload much
> like can be done for the delete window protocol as follows:
> 
> toplevel.protocol("WM_DELETE_WINDOW", callback)
> 
> I realize that the pack manager usually handles all of the resize
> stuff, but I've found an arrangement that the pack manager fails for.
> That is, if one embeds a canvas into a window created inside a text
> widget,

Your meaning here is unclear. How is it possible to have "a window 
created inside a text widget"?

> then resize the text widget (via its container), the canvas and
> its container windows do not resize. So I need to resize the window
> that the canvas is embedded in.

Try the Toplevel.wm_geometry() function.

> The most obvious way of doing this
> would be as above, but there does not seem to be an equivalent to the
> "WM_DELETE_WINDOW" protocol for resizing.

Do you want to detect when a window is resized or do you want to resize 
a window programatically.

If the former, bind the Toplevel to '<Configure>'.

E.g.

from Tkinter import *

def config(t):
   def _r(e, t=t):
     geom = e.widget.wm_geometry()
     geom = geom.split('+')[0]
     t.wm_geometry(geom)
     print 'resized %s to %s' % (t, geom)
   return _r

tk = Tk()
tk.title('resize me')
t2 = Toplevel(tk)
t2.title('I get resized')
tk.bind('<Configure>', config(t2))


Is that cool or what?

James

> Any help would be greatly appreciated.
> 
> Deacon Sweeney
> 


From uval at rz.uni-karlsruhe.de  Sun Jan 21 22:45:34 2007
From: uval at rz.uni-karlsruhe.de (=?UTF-8?B?U2Now7xsZSBEYW5pZWw=?=)
Date: Mon, 22 Jan 2007 04:45:34 +0100
Subject: pylab, matplotlib ... roots function question
In-Reply-To: <mailman.2979.1169447629.32031.python-list@python.org>
References: <ep16t2$fa2$1@news2.rz.uni-karlsruhe.de>
	<mailman.2979.1169447629.32031.python-list@python.org>
Message-ID: <ep2bl8$5qr$1@news2.rz.uni-karlsruhe.de>

Hi,

[...]

> No, that's actually wrong. What version of numpy are you using? With a recent
> SVN checkout of numpy, I get the correct answer:
> 
> In [3]: roots([1,0,0])
> Out[3]: array([ 0.,  0.])

In [17]: import sys, numpy

In [18]: sys.version
Out[18]: '2.5 (r25:51908, Sep 23 2006, 01:23:14) \n[GCC 4.1.1]'

In [19]: numpy.version.version
Out[19]: '1.0rc1'


moon:/pool/PROG/python # uname -a
Linux moon 2.6.16.13-4-smp #1 SMP Wed May 3 04:53:23 UTC 2006 x86_64 
x86_64 x86_64 GNU/Linux

I think I will get and compile newer version of source

BTW, I also look for good (more or less complete and/or interessting)
tutoruals on signal processing with python
something like low/high-pass filtering/ploting of wave files etc
I would appreciate pointers very much.

I am learning this at the moment, when it all starts to make sense to
me, I will write such a tutorial on my own later

Regards, Daniel


From steven.bethard at gmail.com  Thu Jan  4 18:33:38 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 04 Jan 2007 16:33:38 -0700
Subject: When argparse will be in the python standard installation
In-Reply-To: <87d55u7bp7.fsf@pobox.com>
References: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>
	<459C008D.5040404@v.loewis.de>
	<H-ydneqpW-axgAHYnZ2dnUVZ_qWvnZ2d@comcast.com>
	<459CBAC8.9060007@v.loewis.de>
	<64mdnTE_-5Ff3gDYnZ2dnUVZ_q6vnZ2d@comcast.com>
	<87d55u7bp7.fsf@pobox.com>
Message-ID: <UYadnao6VeJMEwDYnZ2dnUVZ_vCknZ2d@comcast.com>

Steven Bethard schrieb:
 > If someone has an idea how to include argparse features into optparse,
 > I'm certainly all for it. But I tried and failed to do this myself, so
 > I don't know how to go about it.

Martin v. L?wis wrote:
 > It's not necessary that the implementation is retained, only that the
 > interface is preserved.
[snip]
 > If you need to make incompatible changes, it would be best if you
 > could produce a list of such changes

Steven Bethard writes:
 > FWIW, here's a short list of issues that could be easily addressed:
 >
 > * alias ArgumentParser to OptionParser
[snip]

John J. Lee wrote:
> all of these issues could ... be addressed by instead providing both
> OptionParser and an OptsAndArgsParser class (or whatever you'd call
> the latter).

You're essentially proposing to move argparse.ArgumentParser to the 
optparse module. (The ArgumentParser class handles both optional and 
positional command-line args -- it *is* your OptsAndArgsProcessor).

That's certainly an easy option for me =) but does it address Martin and 
Fredrik's concerns that there are already too many argument parsing 
libraries in the stdlib?

> Presumably most of the actual implementation code
> would be shared.

Well, the "harder issues" I listed in the previous post were basically 
the reasons that sharing the implementation code would be difficult. I 
don't know how to do it without breaking OptionParser in backwards 
incompatible ways. (The documented ways of extending optparse make this 
particularly difficult since they make public a number of internal 
optparse details.)

STeVe


From ardsrk at gmail.com  Tue Jan 30 02:05:37 2007
From: ardsrk at gmail.com (ArdPy)
Date: 29 Jan 2007 23:05:37 -0800
Subject: Help me understand this
Message-ID: <1170140737.027139.14920@h3g2000cwc.googlegroups.com>

Hi,

Pls tell me whats going on in the code snippet below:

>>> n = 10
>>> statstr = "N = ",n
>>> type(statstr)                                 #case1
<type 'tuple'>
>>> print statstr
('N = ', 10)
>>> print "N = ",n                               #case 2
N =  10

In the first case the result is printed as a tuple and in the second 
it appears as an ordinary string.



From codecraig at gmail.com  Wed Jan 31 08:20:42 2007
From: codecraig at gmail.com (abcd)
Date: 31 Jan 2007 05:20:42 -0800
Subject: marshal.loads ValueError
In-Reply-To: <epq41g$ne6$1@online.de>
References: <1170247461.799295.227550@a75g2000cwd.googlegroups.com>
	<epq41g$ne6$1@online.de>
Message-ID: <1170249642.170475.323110@a75g2000cwd.googlegroups.com>

On Jan 31, 8:02 am, Benjamin Niemann <p... at odahoda.de> wrote:
> marshal is used to (de)serialize python objects from/to strings.
> marshal.loads() tries to deserialize an encoded string back into a python
> object - which does not make sense here.
> What you probably want is:
>
> exec data in my_module.__dict__

thanks that took care of it.



From emin.shopper at gmail.com  Thu Jan 11 17:40:53 2007
From: emin.shopper at gmail.com (Emin)
Date: 11 Jan 2007 14:40:53 -0800
Subject: How much slower is dict indexing vs. list indexing?
Message-ID: <1168555253.601611.258600@k58g2000hse.googlegroups.com>

Dear Experts,

How much slower is dict indexing vs. list indexing (or indexing into a
numpy array)? I realize that looking up a value in a dict should be
constant time, but does anyone have a sense of what the overhead will
be in doing a dict lookup vs. indexing into a list? Some ad hoc tests
I've done indicate that the overhead is less than 15% (i.e., dict
lookups seem to take no more than 15% longer than indexing into a list
and there doesn't seem to be much difference in indexing into a list
vs. a numpy array).

The reason I ask is because I'm wondering how hard I should work to
compute and store an index into a list to avoid repeated hash table
lookups. From my tests, it looks like the answer is basically "don't
bother". Does anyone have information, thoughts, or comments on this?

Thanks,
-Emin



From roux.claude at xrce.xerox.com  Mon Jan 22 06:03:59 2007
From: roux.claude at xrce.xerox.com (Roux Claude)
Date: Mon, 22 Jan 2007 12:03:59 +0100
Subject: Linking in a Linux environment
Message-ID: <ep25mv$vgr$1@s1.news.oleane.net>

Bonjour,

We have implemented Python as an "embedded script language" in our NLP 
application, XIP which a grammar rule engine written in C++ and available as 
a library.

We have also developped a GUI in Java, which is linked to this XIP library, 
to simplify the development of NL grammars.

JAVA GUI IDE
    Library:
        XIP (C++)
            Python Modules can be called from grammar rules


Now we have the following problem, when we try to execute a Python script 
from a grammar in a Linux environment, the system fails when this Python 
module tries to import basic modules like "math" for instance. The system 
returns a "PyExc_OverflowException undefined variable" error.

This problem only occurs on Linux platforms, we do not have any problems on 
Mac OS and on Windows.

We have linked our NLP library with Python 2.4.4, and we have tried many 
different manipulations to solve this problem. We have tried to link with 
the static and the dynamic Python library, without any success.

Searching the WEB, we have discovered similar problems, but none of the 
proposed solutions actually worked. For instance, some people wrote that the 
problem was to due to the compiling options of our Python library; we 
checked the Makefile for these options, which we found to be already there. 
We also tried to modify the dlopen options, as suggested, through the 
specific dlopen operations in the Python corresponding library. NOP...

However, the use the Python 2.5 dynamic library seems to solve most of these 
problems, which would be ok, if people would accept to switch to a version 
that is quite new. Halas, this is not that simple...

I still do not have any clear answer about what is going on. If someone 
could help me on this one, I'll be really grateful... :-)

Merci d'avance,

Claude





From 12cc104 at gmail.com  Mon Jan  8 03:49:08 2007
From: 12cc104 at gmail.com (proctor)
Date: 8 Jan 2007 00:49:08 -0800
Subject: regex question
References: <1168232001.377605.236270@11g2000cwr.googlegroups.com>
	<45a1f0c6$0$18929$4c368faf@roadrunner.com>
	<1168243020.304940.212700@42g2000cwt.googlegroups.com>
	<pan.2007.01.08.08.15.54.609742@REMOVEME.cybersource.com.au>
	<1168244922.620428.273260@38g2000cwa.googlegroups.com>
	<1168245604.911965.248360@11g2000cwr.googlegroups.com>
Message-ID: <1168246148.673027.13720@38g2000cwa.googlegroups.com>


Mark Peters wrote:
> > is there any way i would be successful then, in using raw string inside
> > my makeRE() function?
>
> Why do you think you even need a raw string?
>
> Just build and return the string 'a|b|c' (NOTE: DON'T add the quotes to
> the string)

yes, i suppose you are right.  i can't think of a reason i would NEED a
raw string in this situation.

all very helpful!  thanks very much.

sincerely,
proctor.



From smusnmrNOSPAM at yahoo.com  Thu Jan  4 04:10:02 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Thu, 4 Jan 2007 10:10:02 +0100
Subject: pow() works but sqrt() not!?
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
	<1167899693.759071.51450@31g2000cwt.googlegroups.com>
Message-ID: <enig9a$cncb$1@zam602.zam.kfa-juelich.de>

Thank you very much, T?nis!:

*** 1 ***
>you forgot to import math module
>>> import math

Nope, I did not! But I used sqrt(9), and not math.sqrt(9). The latter works
excellent, thank you! From now on, I will use "import math" and
"math.fuction()" for EVERY mathematical function, even for pow() etc. just
to be on the safe side!

*** 2 ***
>if you want math functions to your current namespace use:
>>> from math import *

What is a "namespace" and what is the difference between ">>>import math"
and ">>>from math import *" ?

Siggi


"tonisk" <metsakuri at gmail.com> schrieb im Newsbeitrag
news:1167899693.759071.51450 at 31g2000cwt.googlegroups.com...
you forgot to import math module

>>> import math
>>> math.sqrt(9)
3.0

if you want math functions to your current namespace use:
>>> from math import *

--
T?nis

On Jan 4, 10:13 am, "siggi" <smusnmrNOS... at yahoo.com> wrote:
> Hi all,
>
> this is a newbie question on :
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)]
> on
> win32
> PC with WinXP
>
> Inhttp://www.python.org/doc/2.3.5/lib/module-math.html
> I read:
>
> "sqrt( x) Return the square root of x."
>
> Now the test for module math with function pow():
> --------------------------------------------------->>> pow(9,9)387420489
>
>  Fine, but sqrt() fails:
> ------------------->>> sqrt(9)I get this error message
>
> 'Traceback (most recent call last):
>   File "<pyshell#3>", line 1, in <module>
>     sqrt(9)
> NameError: name 'sqrt' is not defined'
>
> Same for sin() and cos(). ">>> Import math" does not help. Will I have to
> define the sqrt() function first? If so, how?
>
> Please help!
>
> Thank you,
>
> Siggi






From paul at boddie.org.uk  Wed Jan 24 12:46:47 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 24 Jan 2007 09:46:47 -0800
Subject: Python does not play well with others
In-Reply-To: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
Message-ID: <1169660807.369400.120220@h3g2000cwc.googlegroups.com>

On 24 Jan, 02:50, John Nagle <n... at animats.com> wrote:
>    The major complaint I have about Python is that the packages
> which connect it to other software components all seem to have
> serious problems.  As long as you don't need to talk to anything
> outside the Python world, you're fine.

I think you're overstating your case here, since there is a lot of
Python code out there (much of it under the radar of many readers of
this newsgroup/list) whose purpose is precisely that of integration
with other software components. Having read what you've written
elsewhere with regard to SSL integration with Python, though, the
causes of the symptoms you're seeing are mostly correctly identified in
your own analysis.

>    In the Perl, Java, PHP, and C/C++ worlds, the equivalent functions just work.

We may have differing experiences here. Java stuff, in my experience,
usually needs lots of precisely versioned .jar files and then
frequently doesn't "just work". C and C++ aren't complete environments,
but there are admittedly some libraries/frameworks/environments based
on those languages which might provide solutions which often work
satisfactorily. I don't really want to think of the cocktail of
solutions available for Perl to solve any given problem, but people
often report that the quality varies somewhat between them.

>   That's because, in those worlds, either the
> development team for the language or the development team
> for the subsystem takes responsibility for making them work.
> Only Python doesn't do that.

And this is where I'd almost reach agreement with you. It's not enough
for the language to keep growing new features if the libraries are
broken or appear archaic, and this task seems to be outside the "core
developers" area of interest. Of course, people like you and I could
help update the libraries, although finding the time for making more
than just suggestions can be quite difficult, but the core developers
merely signalling that the libraries are a priority area for
development would probably lead to fewer people pushing their own
favourite syntax brush-ups or esoteric constructs, hopefully leading
some people (with enough time) to update, document and improve what's
already there.

Paul



From nmadnani at gmail.com  Thu Jan 18 22:53:58 2007
From: nmadnani at gmail.com (Nitin)
Date: 18 Jan 2007 19:53:58 -0800
Subject: subclassing pyrex extension types in python
Message-ID: <1169178838.303291.291740@s34g2000cwa.googlegroups.com>

Hi All

I am trying to subclass an extension type in Python and add attributes
to the new class but I keep getting errors. I read the "Extension
Types" document on the Pyrex website but I couldn't get an answer from
it.

Here's the Spam extension type from Pyrex website:

cdef class Spam:

  cdef int amount

  def __new__(self):
    self.amount = 0

  def get_amount(self):
    return self.amount

Once compiled, here's how I am using this:

import spam

class mySpam(spam.Spam):
    def __init__(self, name1=None, name2=None):
        spam.Spam.__init__(self)
        self.name1 = name1
        self.name2 = name2

When I run this Python code, I get an error "TypeError: 'name2' is an
invalid keyword argument for this function"

Is there something I need to know about Pyrex extension types and
keyword arguments ? I tried to google for this but couldn't come up
with anything.

Thanks !
Nitin



From rvernica at gmail.com  Fri Jan 26 20:09:05 2007
From: rvernica at gmail.com (Rares Vernica)
Date: Fri, 26 Jan 2007 17:09:05 -0800
Subject: Unicode error handler
In-Reply-To: <epdnjh$8e1$03$1@news.t-online.com>
References: <mailman.3212.1169841312.32031.python-list@python.org>
	<epdnjh$8e1$03$1@news.t-online.com>
Message-ID: <epe8ni$5cl$1@sea.gmane.org>

It does the job.

Thanks a lot,
Ray

Peter Otten wrote:
> Rares Vernica wrote:
> 
>> Is there an encode/decode error handler that can replace all the
>> not-ascii letters from iso-8859-1 with their closest ascii letter?
> 
> A mapping, not an error handler, but it might do the job:
> 
> http://effbot.org/zone/unicode-convert.htm
> 
> Peter



From TimDGCB at gmail.com  Wed Jan 31 15:21:36 2007
From: TimDGCB at gmail.com (TimDGCB at gmail.com)
Date: 31 Jan 2007 12:21:36 -0800
Subject: DCOP memory leak?
In-Reply-To: <1170269516.158040.38450@s48g2000cws.googlegroups.com>
References: <1170193025.867274.242350@m58g2000cwm.googlegroups.com>
	<qsqdnaZ8iZ52QSLYnZ2dnUVZ_o2vnZ2d@comcast.com>
	<1170265582.892012.69290@v45g2000cwv.googlegroups.com>
	<1170269516.158040.38450@s48g2000cws.googlegroups.com>
Message-ID: <1170274896.450862.268330@s48g2000cws.googlegroups.com>

On 31 jan, 19:51, "David Boddie" <d... at boddie.org.uk> wrote:
> On Jan 31, 6:46 pm, "TimD... at gmail.com" <TimD... at gmail.com> wrote:
>
> > The code I posted is not my actual program and was only to demonstrate
> > my problem. The complete program I'm writing uses QT and so the loop
> > is replaced by a Timer event.
> > I tried out the suggestion. I had already tried the del dcop
> > instruction, so I knew that wasn't it. I also placed the DCOP variable
> > outside my loop but that didn't help either.
>
> You might get a precise answer to your question if you send a message
> to the PyQt/PyKDE mailing list:
>
>  http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
>
> The original authors and contributors of various Python DCOP modules
> read that list, so there's a chance they can either solve your problem
> or offer some advice on how to work around it.
>
> > What I did notice that my program only grew in memory use when the
> > 'ok, Ms = AmarokDcopRes.player.trackCurrentTimeMs() ' code was
> > executed (or any other function using the AmarokDcopRes variable like
> > 'ok, volume = AmarokDcopRes.player.getVolume()' )
>
> Do you find the same problem with other DCOP interfaces?
>
> David

Hi David,

I did tried out some other DCOP calls from other programs and I have
the same problem.

I followed your suggestion to subcribe and poste to the pyKDE mailing
list. I hope they can help me there.

Thanks,

Tim



From tmaroff at yahoo.com  Tue Jan  9 16:25:15 2007
From: tmaroff at yahoo.com (Tristan)
Date: 9 Jan 2007 13:25:15 -0800
Subject: A question about IDLE and environment variables
Message-ID: <1168377915.536426.159580@77g2000hsv.googlegroups.com>

Hello community:
I post this because I could not find satisfactory answers in the posts
generated by this nice group.
I work on winXP. I have many little python applications in different
folders, each application can share or not other objects located in the
same or other folders.
The way I work to use these applications is:
1)	For almost everyone, I execute a corresponding ".bat file" into
which I define and/or include values for some "temporal"
environment variables that let me find all the objects that the
selected application uses. Sometimes I include in the .bat file the
execution of the application, but generally I leave in a prompt status,
ready to invoke python or some dos commands.
2)	When I close the command prompt window, there are no traces of my
enviroment variables in my windows system (that is right). Only the
default windows environment variables remain.

I tried to do the same with the IDLE (and I imagine tha same occurs
with Python command line), but I have the next problem:
I can not find in IDLE (or another app?) the way to previously define
and/or include automatically values for my "temporal" environment
variables as I do in the .bat files. The use of Control Panel -> System
-> Advanced is tedious to use as, my enviroment variables values are
"temporal". 
Any advice,  please???



From vodel at hrz.tu-chemnitz.de  Fri Jan  5 07:44:00 2007
From: vodel at hrz.tu-chemnitz.de (Matthias Vodel)
Date: Fri, 5 Jan 2007 13:44:00 +0100
Subject: Change coords of a canvas.line item
References: <enlfps$aka$1@anderson.hrz.tu-chemnitz.de>
	<mailman.2322.1168000506.32031.python-list@python.org>
Message-ID: <enlh86$e19$1@anderson.hrz.tu-chemnitz.de>

Very nice :)

Thank you,

Matthias


From dummy at dummy.nl  Fri Jan 19 12:19:04 2007
From: dummy at dummy.nl (Cecil Westerhof)
Date: Fri, 19 Jan 2007 18:19:04 +0100
Subject: Is it possible to fasten the import of cgi?
References: <45af6f47$0$322$e4fe514c@news.xs4all.nl>
	<mailman.2895.1169199516.32031.python-list@python.org>
Message-ID: <45b0fd87$0$333$e4fe514c@news.xs4all.nl>

BJ?rn Lindqvist wrote:

> On 1/18/07, Cecil Westerhof <dummy at dummy.nl> wrote:
>> I have a cgi-script dat uses the modules cgi, os, sys and time. Offcourse
>> I can not time the time used to import time, but os and sys do not take
>> more as a millisecond. My script itself takes 3 or 4 milliseconds. But
>> importing cgi takes 95 milliseconds. (This is on my test system a PII 300
>> MHz. Is there a way to make this more fast? The import off cgi makes the
>> script at least 20 times as slow. Something like mod-python is not a
>> possibility. I could use it on my test machine, but not at the osting
>> provider.
> 
> Maybe python-launcher-daemon can help you?
> http://blogs.gnome.org/view/johan/2007/01/18/0 But if you can not use
> mod_python then you probably can not use any long running processes
> either.

By my current provider I can not use this. But I am going to look for
another. What are the pro's en cons off the different systems? FastCGI,
PyApache, mod_pythion and maybe others I am not aware off.



From ken at seehart.com  Sun Jan  7 15:42:07 2007
From: ken at seehart.com (Ken Seehart)
Date: Sun, 07 Jan 2007 12:42:07 -0800
Subject: audio video streaming communications
Message-ID: <45A15B1F.7000200@seehart.com>

Hello,

I am looking for a good audio/video conferencing library.  Ideally it 
should work with wxPython (or have some means of making it work there).

So far my main difficulty in my attempt at searching for such a package 
is that there is so much stuff out there on downloading music and videos.

I am not interested in download torrents, etc.  I'm just looking video 
conferencing, and live video broadcasts, etc.

Any recommendations?

Thanks,
- Ken




From steve at holdenweb.com  Fri Jan 12 03:43:55 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 12 Jan 2007 08:43:55 +0000
Subject: *#$% &@! Jerub on #python, you desynced me for no good reason
In-Reply-To: <1168584166.949097.233620@11g2000cwr.googlegroups.com>
References: <1168584166.949097.233620@11g2000cwr.googlegroups.com>
Message-ID: <eo7hoa$4na$1@sea.gmane.org>

gavino wrote:
> I can't fucking believe this guy.  The chat was jsut getting
> interesting about epoll on linux and twisted moduel for it and he
> desyncs me.
> FUCK JERUB
> complete fucking asshole!!
> 
Well I hope you feel better now. Please don't imagine that this outburst 
will have any practical effects *other* than that, however. This is the 
Internet. What happened, happened. Move on.

If there are any lessons to be learned, one of them might be that not 
everybody appreciates your chosen mode of expression.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From pierre at saiph.com  Sat Jan 13 04:39:01 2007
From: pierre at saiph.com (Imbaud Pierre)
Date: Sat, 13 Jan 2007 10:39:01 +0100
Subject: module file
Message-ID: <45a8a8b6$0$22646$426a34cc@news.free.fr>

I am willing to retrieve the file an imported module came from
module.__file__, or inspect.getfile(module) only gives me the
relative file name. How do I determine the path?
Its obviously possible from python: ipython displays the information
(interactively: *module?*).
NB: I saw the discussion about the python path, "find a .py path",
this is different! Its not the script, but the module I want to
retrieve!


From http  Sat Jan 27 11:49:12 2007
From: http (Paul Rubin)
Date: 27 Jan 2007 08:49:12 -0800
Subject: Dictionary inserts and threads
References: <45bb7eac$0$321$e4fe514c@news.xs4all.nl>
Message-ID: <7x64as1kl3.fsf@ruckus.brouhaha.com>

"Martin P. Hellwig" <mhellwig at xs4all.nl> writes:
> I assume that this is not a problem, but since assuming something
> gives a lot of room for screw-ups I rather ask beforehand if I should
> except all kinds of troubles when multiple threads update 'at the same
> time' a dictionary or that I should lock the dictionary, for each
> update?

Use a lock, or serialize the updates through a queue.


From bob at passcal.nmt.edu  Fri Jan 26 13:07:27 2007
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Fri, 26 Jan 2007 11:07:27 -0700
Subject: Fixed length lists from .split()?
Message-ID: <2007012611072716807-bob@passcalnmtedu>

I'm reading a file that has lines like

    bcsn; 1000000; 1223
    bcsn; 1000001; 1456
    bcsn; 1000003
    bcsn; 1000010; 4567

The problem is the line with only the one semi-colon.
Is there a fancy way to get Parts=Line.split(";") to make Parts always 
have three items in it, or do I just have to check the length of Parts 
and loop to add the required missing items (this one would just take 
Parts+=[""], but there are other types of lines in the file that have 
about 10 "fields" that also have this problem)?

Thanks!

Bob



From gagsl-py at yahoo.com.ar  Tue Jan 16 19:43:13 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 16 Jan 2007 21:43:13 -0300
Subject: urrlib2 multithreading error
In-Reply-To: <1168958510.834175.184730@a75g2000cwd.googlegroups.com>
References: <1168958510.834175.184730@a75g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20070116214146.0428aac8@yahoo.com.ar>

At Tuesday 16/1/2007 11:41, viscanti at gmail.com wrote:

>When I use it on a single thread everything goes ok, when I create
>multiple threads the execution halts and the program terminates, just
>before the last line (when I execute the request.read(.) ). Obviously I
>tried to catch the exception but it doesn't work, the interpreter exits
>without any exception or message.

Ouch... Can you reduce your program to the minimum code that fails, 
and post it?


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From python at hope.cz  Wed Jan 24 11:20:25 2007
From: python at hope.cz (Johny)
Date: 24 Jan 2007 08:20:25 -0800
Subject: Regex for URL extracting
Message-ID: <1169655624.981833.29730@j27g2000cwj.googlegroups.com>

Does anyone know about a good regular expression  for URL extracting?

J.



From nmm1 at cus.cam.ac.uk  Thu Jan 18 04:58:07 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 18 Jan 2007 09:58:07 GMT
Subject: Class data members in C
References: <eojhuu$72c$1@gemini.csx.cam.ac.uk><mailman.2814.1169026003.32031.python-list@python.org>
	<eokrds$pta$1@gemini.csx.cam.ac.uk>
	<mailman.2861.1169101998.32031.python-list@python.org>
Message-ID: <eongbf$fdd$1@gemini.csx.cam.ac.uk>


In article <mailman.2861.1169101998.32031.python-list at python.org>,
"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
|> 
|> > Oh, one of the first two - I am not bonkers!  Changing a class after
|> > instance creation is guaranteed to cause confusion, if nothing else.
|> > 
|> *grin* - its also just about impossible to do, if you try to imagine
|> what you would have to do to all instances when you effectively
|> change the __init__ method.  And some people expect it to happen
|> automagically...

Oh, it's quite easy to do, with several different semantics.  I have even
used a couple of them.  All are seriously counter-intuitive :-)

I have never used one that successfully reran initialisation, though
I have seen people attempt it!  And tried it myself ....

|> Sorry I can't be of more help. All of the docs I have read essentially
|> talk about changing instances.  From a practical point of view I would 
|> say: "Just redefine it".  But that is not very helpful. Specially if you are
|> mucking about in C, as your title suggests...

Thanks.  As someone else posted, the answer is PyDict_SetItemString
immediately after PyType_Ready.


Regards,
Nick Maclaren.


From simon at arrowtheory.com  Mon Jan 15 13:35:40 2007
From: simon at arrowtheory.com (Simon Burton)
Date: 15 Jan 2007 10:35:40 -0800
Subject: compile your python programs with rpython
Message-ID: <1168886140.256596.101250@v45g2000cwv.googlegroups.com>

The pypy'ers have written a brief description on
using rpython to create standalone executables:

http://codespeak.net/pypy/dist/pypy/doc/standalone-howto.html

This is definately worth playing around with, it's very nice writing
(r)python code that gets executed as if it were c code.

Simon.



From py at th.on  Thu Jan 25 11:07:25 2007
From: py at th.on (py)
Date: Thu, 25 Jan 2007 16:07:25 GMT
Subject: smtplib starttls gmail example - comments?
Message-ID: <1B4uh.3171$R65.534@trnddc01>

Excellent imput!

I learned
- no need for trailing . and i was doing it wrong anyway.
- all those extra trys were redundant.
- the trailing comma functionality in print.
- the extra ehlo is an rfc req.

Thanks all.

-dave


From allison.william at gmail.com  Sun Jan  7 09:11:53 2007
From: allison.william at gmail.com (William Allison)
Date: Sun, 07 Jan 2007 09:11:53 -0500
Subject: I want to learn
In-Reply-To: <mailman.2386.1168178452.32031.python-list@python.org>
References: <1168174097.252001.71130@s80g2000cwa.googlegroups.com>
	<mailman.2386.1168178452.32031.python-list@python.org>
Message-ID: <Wc-dnXfFJaAzYj3YnZ2dnUVZ_rylnZ2d@comcast.com>

Thomas Ploch wrote:
> joeyslistings at yahoo.com schrieb:
>> Hi,
>>
>> I have been "programming" in the .net environment and ide for a few
>> years and I am looking to make the switch over to python. I have
>> absolutely no python experience whatsoever. I am looking for a python
>> guru who has instant messenger or gtalk or whatever who can meet me
>> online in the mornings, give me some direction for the day and then
>> answer some questions here and there online throughout the day. 
> 
> 
> So you are looking for a person (no, a guru), that stays by your side
> the whole day, gives you answers and helps you learning python.
> 
> This is a ridiculous request.
> 
> If you want to learn python, you should start with visiting
> http://www.diveintopython.org/ and read it. If you have previous
> programming experience, this is the place to start.
> 
>> Sorry to interrupt the group but since all python gurus appear to be
>> happily at work on the next level apps at google nobody responded to
>> my craigslist ads.
> 
> You can always ask your questions here on the list, there are enough
> people that are willing to help.
> 
> Thomas

Also look into the tutor mailing list.  Not EXACTLY what you're asking
for but, very helpful, friendly people subscribe to it.

http://mail.python.org/mailman/listinfo/tutor


From steve at REMOVE.THIS.cybersource.com.au  Thu Jan 25 09:51:23 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 26 Jan 2007 01:51:23 +1100
Subject: free variables /cell objects question
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com>
	<1169563580.634000.122540@v45g2000cwv.googlegroups.com>
	<mailman.3047.1169599631.32031.python-list@python.org>
	<1169725374.504546.153890@v33g2000cwv.googlegroups.com>
	<7xirevuw5s.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.01.25.14.51.22.464916@REMOVE.THIS.cybersource.com.au>

On Thu, 25 Jan 2007 04:29:35 -0800, Paul Rubin wrote:

> "gangesmaster" <tomerfiliba at gmail.com> writes:
>> what i see as a bug is this code not working as expected:
>> 
>> >>> def make_foos(names):
>> ...     funcs = []
>> ...     for n in names:
>> ...             def foo():
>> ...                     print "my name is", n
>> ...             funcs.append(foo)
>> ...     return funcs
> 
> But it does work as expected, if your expectations are based on what
> closures actually do.
> 
>> i have to create yet another closure, make_foo, so that the name
>> is correctly bound to the object, rather than the frame's slot:
> 
> The Python idiom is:
> 
>    def make_foos(names):
>        funcs = []
>        for n in names:
>                def foo(n=n):
>                        print "my name is", n
>                funcs.append(foo)
>        return funcs
> 
> The n=n in the "def foo" creates the internal binding that you need.

Hmmm... I thought that the introduction of nested scopes removed the need
for that idiom. Its an ugly idiom, the less I see it the happier I am.

And I worry that it will bite you on the backside if your "n=n" is a
mutable value.

My solution is, don't try to have one function do too much. Making a list
of foos should be a separate operation from making a single foo:

>>> def makefoo(name):
...     def foo():
...             return "my name is " + name
...     return foo
...
>>> makefoo("fred")()
'my name is fred'
>>> def makefoos(names):
...     foos = []
...     for name in names:
...             foos.append(makefoo(name))
...     return foos
...
>>> L = makefoos(["fred", "wilma"])
>>> L[0]()
'my name is fred'
>>> L[1]()
'my name is wilma'


That makes it easier to do unit testing too: you can test your makefoo
function independently of your makefoos function, if that's important.

If you absolutely have to have everything in one function:

>>> def makefoos(names):
...     def makefoo(name):
...             def foo():
...                     return "my name is " + name
...             return foo
...     L = []
...     for name in names:
...             L.append(makefoo(name))
...     return L
...
>>> L = makefoos(["betty", "barney"])
>>> L[0]()
'my name is betty'
>>> L[1]()
'my name is barney'


Best of all, now I don't have to argue as to which binding behaviour is
more correct for closures!!! *wink*


-- 
Steven.



From fredrik at pythonware.com  Wed Jan  3 10:30:41 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 3 Jan 2007 16:30:41 +0100
Subject: Can I beat perl at grep-like processing speed?
References: <mailman.2124.1167404439.32031.python-list@python.org>
	<slrnepavna.hgo.nick@irishsea.home.craig-wood.com>
Message-ID: <engi71$spc$1@sea.gmane.org>

Nick Craig-Wood wrote:

>>  #!/usr/bin/env python
>>  import re
>>  r = re.compile(r'destroy', re.IGNORECASE)
>>
>>  for s in file('bigfile'):
>>    if r.search(s): print s.rstrip("\r\n")

footnote: if you're searching for literal strings with Python 2.5, using "in" is a
lot faster than using re.search.

</F> 





From smusnmrNOSPAM at yahoo.com  Tue Jan  9 11:09:57 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Tue, 9 Jan 2007 17:09:57 +0100
Subject: how to clean sys.path
Message-ID: <eo0eom$cirq$1@zam602.zam.kfa-juelich.de>

Hi all,

when I do >>>sys.path in IDLE (winXP), i get a horrendously long list of 
paths, paths I may have used during a lot of trials and errors. How can I 
clean up sys.path? I mean, trim it of unnecessary paths?

So far, I know only the command >>>sys.path.append(r'c:....etc...'), but how 
to delete or insert at the beginning of the list, I know not.

Thanks,

siggi




From gagsl-py at yahoo.com.ar  Tue Jan 30 18:19:32 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 20:19:32 -0300
Subject: Convert raw data to XML
References: <1170124927.718200.225080@m58g2000cwm.googlegroups.com>
	<mailman.3289.1170133211.32031.python-list@python.org>
	<1170184059.739808.244660@s48g2000cws.googlegroups.com>
	<CyNvh.1384$zH1.1245@newssvr29.news.prodigy.net>
	<1170189278.490020.52670@h3g2000cwc.googlegroups.com>
	<MZOvh.8349$uK1.6030@newsfe23.lga>
Message-ID: <op.tmzpquffsd1mbx@gabriel2.softlabbsas.com.ar>

elrondrules at gmail.com wrote:

> is there any other way to do this without using BeautifulStoneSoup..
> using existing minidom or ext..
> i dont want to install anything new

It appears that you already know the answer... Look at the minidom  
documentation, toprettyxml method.

-- 
Gabriel Genellina



From rkmr.em at gmail.com  Fri Jan 12 15:17:04 2007
From: rkmr.em at gmail.com (mark)
Date: Fri, 12 Jan 2007 12:17:04 -0800
Subject: dynamic argument name for functions
Message-ID: <e04d2e90701121217w32829ef9g4bd0af00b643dc2c@mail.gmail.com>

I want to pass a value to an argument of a function. The argument name is
dynamic and is stored in a
variable. How do I call the function using with arg_name and value as the
parameters.
thanks
mark

For ex:
def function(arg1='None', arg2='None', arg3='None'):
      print arg1
      print arg2
      print arg3


arg_name = 'arg1'
arg_value = 'i am passing a value to argument 1'
function(???????)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070112/9c022c30/attachment.html>

From ptmcg at austin.rr._bogus_.com  Thu Jan 18 01:34:03 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 18 Jan 2007 00:34:03 -0600
Subject: [Python-Dev] Deletion order when leaving a scope?
References: <45AEC612.1030001@hastings.org>
	<mailman.2860.1169086798.32031.python-list@python.org>
Message-ID: <45af14dc$0$7727$4c368faf@roadrunner.com>

"Calvin Spealman" <ironfroggy at gmail.com> wrote in message 
news:mailman.2860.1169086798.32031.python-list at python.org...
> Absolutely an irrelevent side effect, especially when you take into
> consideration the 4 and counting alternative implementations of the
> language.
>
> None the less, I can explain why it is as it is, keeping in mind its
> not like that on purpose, its just how it is. Locals are optimized
> into an array for fast lookup. Every name assigned to in a function is
> known as a local in that function and this internal array holds its
> reference. It is simply a product of the array indexes and deletion
> order being the same, 0 to N.
>

Oh good!  Now I can write code that relies on this behavior!

-- Paul 




From martin at v.loewis.de  Fri Jan  5 22:26:58 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 06 Jan 2007 04:26:58 +0100
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5
In-Reply-To: <mailman.2358.1168049310.32031.python-list@python.org>
References: <mailman.2358.1168049310.32031.python-list@python.org>
Message-ID: <459f1703$0$24039$9b622d9e@news.freenet.de>

Carroll, Barry schrieb:
> What I want to know is:
> 
> * has anyone else encountered a problem like this, * how was the
> problem corrected, * can the fix be retro-fitted to 2.5 and 2.4?

>From your description, I suspect an error in your code. Your description
indicates that you don't expect to have more than five files open
simultaneously. Yet, the error message "Too many open files" occurs when
you open many more files (in the order of hundreds of files).

It is very unlikely that there is a bug in Python where it would fail to
close a file when .close() is explicitly invoked on it (as your
description suggests that you do), so if you get that error message, it
can only mean that you fail to close some files.

Notice that you may have other files open, as well, and that those also
count towards the limit.

As a debugging utility, you can use Sysinternal's process explorer.
Make the program halt (not exit) when the exception occurs (e.g. by
having it sleep(1) in a loop), then view all open handles in the
process explorer (check the menu if it doesn't display them initially).

Regards,
Martin


From meelab at free.fr  Wed Jan  3 17:38:35 2007
From: meelab at free.fr (meelab)
Date: Wed, 03 Jan 2007 23:38:35 +0100
Subject: static object
Message-ID: <459c306c$0$314$426a74cc@news.free.fr>

Dear All,

I am looking for a way to create a "static object" or a "static class" -
terms might be inappropriate - having for instance:

class StaticClass:
    .
    .

and then
staticObject1 = StaticClass()
staticObject2 = StaticClass()

so that staticObject1 and staticObject2 refers exactly to the same
instance of object.

In other words, that is a class which would result in only 1 instance
always the same no matter how many times I will "instantiate" it.

My purpose is to permit this class to initialize a massive amount of
data that I need to access from different points of my program without
duplicating this data in memory and without loosing time in reloading it
 each time I need it.

I noticed the staticmethods, and the __new__ method which could , but I
always get stuck in actually creating static DATA without having global
data.

Does anyone have a start of a clue to this ?

Many thanks in advance

Emmanuel.


From rridge at csclub.uwaterloo.ca  Sat Jan 20 00:12:08 2007
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 19 Jan 2007 21:12:08 -0800
Subject: Determining when a file is an Open Office Document
References: <eop5ci$et5$1@solaris.cc.vt.edu>
	<1169171820.851021.49200@l53g2000cwa.googlegroups.com>
	<eopicc$95t$1@solaris.cc.vt.edu>
	<1169239691.159739.304050@l53g2000cwa.googlegroups.com>
	<pan.2007.01.20.04.10.35.935414@REMOVE.THIS.cybersource.com.au>
Message-ID: <1169269928.081540.210010@51g2000cwl.googlegroups.com>

Ross Ridge wrote:
> So identifying PDF files is pretty easy.

Steven D'Aprano wrote:
> Sure. MIS-identifying PDF files is pretty easy. Identifying them is not.
> Consider this example:

Your contrived example doesn't show how a PDF file would be
misidentified, it only shows how a file deliberately made to look like
PDF file would be "misidentified".  Since that was the intent of
crafting such a file, I don't see the problem.

> Is there a security vulnerability buried in the detection of file types by
> magic bytes? I don't know, but I wouldn't be surprised if there were.

There's only a security vulnerability if you choose to trust a file
based on it's assumed file type.  Since PDF files generally aren't
trusted, it's not likely to be an issue for whatever application tubby
has in mind.

>Any file system that doesn't have file type metadata is reduced to
>guessing the type of the file, and guesses can be wrong.

File type metadata can also be wrong.  You can give any file a .PDF
extension and Windows will believe it's a PDF file.  On Mac OS if file
has a signature "CARO"/"PDF ", it will believe it's a PDF file
regardless of it's contents.  Metadata doesn't make programs any less
vulnerable to deliberate attempts to fool them.

                                         Ross Ridge



From Barry.Carroll at psc.com  Tue Jan 16 14:39:39 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Tue, 16 Jan 2007 11:39:39 -0800
Subject: OT: teleporters (Was: General Question About Python)
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A78@eugsrv400.psc.pscnet.com>

> -----Original Message-----
> From: Hendrik van Rooyen [mailto:mail at microcorp.co.za]
> Sent: Saturday, January 13, 2007 9:47 PM
> To: Torabisu; python-list at python.org
> Subject: Re: General Question About Python
> 
>  "Torabisu" <tpawley at gmail.com> wrote:
> 
> 
> >
> > Hendrik van Rooyen wrote:
> 
> > > What do you want done? - I am only a thousand miles away...
> > >
> >
> > If I can just get my Python teleporter sorted out, distance will be
no
> > problem...  A little buggy at the moment though...  Poor John, I
told
> > him not to test it but oh well.
> 
> OMG!  - I have been feeding that unexpected heap of minced meat
> to the cat...
> 
> - Hendrik
> 
Gentlemen:

Y'all really need to be more careful.  Much research has been done on
matter teleportation, and there is ample documentation of the dangers
involved.  The logs of the USS Enterprise alone are rife with the
horrible consequences of "transporters gone wild".(1) In addition, the
historical records of the  NSEA Protector contain a particularly
gruesome account of a "digital conveyor" malfunction which caused the
subject to turn inside out and then explode.(2)

These experiments MUST be conducted under the most rigorous controls to
prevent similar catastrophes.  (Unless, you're using Perl programmers as
test subjects, in which case it's okay.  ;^)

Humorously yours,
 
Barry

---------------
(1) "Star Trek: the Motion Picture": Roddenberry, Foster and Wise, 1979 
(2) "Galaxy Quest": Howard, Gordon and Parisot, 1999




From bg_ie at yahoo.com  Tue Jan  9 05:09:51 2007
From: bg_ie at yahoo.com (bg_ie at yahoo.com)
Date: 9 Jan 2007 02:09:51 -0800
Subject: A simple array in Python
Message-ID: <1168337391.770307.54750@11g2000cwr.googlegroups.com>

Hi,

I have the following enum -

class State:
	Fire = 0
	Water = 1
	Earth = 2

And I want a variable which holds a value for each of these states,
something like -

myState1[State.Fire] = 10
myState1[State.Earth] = 4

myState2[State.Fire] = 20
myState2[State.Earth] = 24

How do I do this?

Thanks Barry.



From rubbishemail at web.de  Wed Jan 10 05:17:58 2007
From: rubbishemail at web.de (rubbishemail at web.de)
Date: 10 Jan 2007 02:17:58 -0800
Subject: convert binary data to int
Message-ID: <1168424278.193439.216770@k58g2000hse.googlegroups.com>

Hello,


I need to convert a 3 byte binary string like
"\x41\x00\x00" to 3 int values ( (65,0,0) in this case).
The string might contain characters not escaped with a \x, like
"A\x00\x00"


Any ideas?


Daniel



From ebgssth at gmail.com  Thu Jan 18 11:43:51 2007
From: ebgssth at gmail.com (js )
Date: Fri, 19 Jan 2007 01:43:51 +0900
Subject: How to find out if another process is using a file
In-Reply-To: <eoo6vd$33u$1@gemini.csx.cam.ac.uk>
References: <eoo6vd$33u$1@gemini.csx.cam.ac.uk>
Message-ID: <a23effaf0701180843p15bd12f0lcfc01c0b556c5d3c@mail.gmail.com>

How about using lock?
Let writing process locks the files before writing, and unlock after
the job's done.

I think it'd work  file in most environment.

On 1/19/07, Tom Wright <tew24 at spam.ac.uk> wrote:
> I'm writing a program which reads a series of data files as they are dumped
> into a directory by another process.  At the moment, it gets sporadic bugs
> when it tries to read files which are only partially written.
>
> I'm looking for a function which will tell me if a file is opened in
> write-mode by another process - if it is, my program will ignore it for now
> and come back to it later.  This needs to work on linux and windows.  Mac
> OS would be a bonus too.  An os-independent solution would be good, but I
> could write os-specific options and have it pick the appropriate one.
>
> Is there any way of doing this? I've drawn a blank with google so far.
>
> A nasty hack would be to use the file modification time, and wait until
> that's a few seconds in the past, but is there a nice solution?
>
>
> --
> I'm at CAMbridge, not SPAMbridge
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From gagsl-py at yahoo.com.ar  Sun Jan  7 14:24:24 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 11:24:24 -0800
Subject: urlib.quote gives KeyError in Python 2.4.4 but workin 2.3.5
In-Reply-To: <1168195697.483795.71160@38g2000cwa.googlegroups.com>
References: <1168195697.483795.71160@38g2000cwa.googlegroups.com>
Message-ID: <1168197864.496582.105530@42g2000cwt.googlegroups.com>

On 7 ene, 15:48, "nyenyec" <nyen... at gmail.com> wrote:

> urllib.quote chokes on unicode in 2.4.4.
>>> urllib.quote(u"\xe9")
> KeyError: u'\xe9'
>
> but it seems to work in Python 2.3.5
>
> Is this a known bug?

See some recent posts about "urllib.unquote and unicode"

-- 
Gabriel Genellina



From franck.perez at gmail.com  Mon Jan  8 06:49:15 2007
From: franck.perez at gmail.com (Franck PEREZ)
Date: Mon, 8 Jan 2007 12:49:15 +0100
Subject: Proper way of handling "plug-in" methods
Message-ID: <f6b00e360701080349i50e1b4b1ta1e686cae9799d63@mail.gmail.com>

All,

My application deals with strings formatting. I have built-in methods
but I also expect the user to add its methods in its own .py files
(some sort of plugin methods, all user methods should be exposed in my
application).

Here is the structure I have thought of :

formatting.py
_formattingDict = {} #a dict composed of all available methods, both
builtin and user
def expose(...) : #adds a method to the dict

builtinformatting.py
import myapp.formatting.expose
@expose
def builtinMethod(inputStr) : return someOutput

/home/user/.myapp/customformatting.py
import myapp.formatting.expose
@expose
def customMethod(inputStr) : return someOutput

model.py
#References all the methods, both builtin and custom
execfile("builtinformatting.py")
execfile("/home/user/.myapp/customformatting.py")

Expected result after the execfile : formatting._formattingDict
contains the 2 methods builtinMethod and customMethod

Is this a proper way of structuring my application ? Do you see
anything better ?

Moreover, I dislike execfile("builtinformatting.py") since classic
import would do the job. However I first wanted a united method for
both builtin and custom scripts since it is the same logic for me.

Thanks very much in advance for your advice.
Franck


From fredrik at pythonware.com  Wed Jan  3 13:18:42 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 03 Jan 2007 19:18:42 +0100
Subject: Unsubscribing from the list
In-Reply-To: <880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com>
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>	<ene064$bm5$1@sea.gmane.org>	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>	<enghj3$qhf$1@sea.gmane.org>
	<880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com>
Message-ID: <engs22$6u3$1@sea.gmane.org>

Dotan Cohen wrote:

> Actually, I'm a compete idiot

Robert provided *detailed* instructions, which you ignored.   I quoted 
the same instructions in my reply, which you also ignored.  the sentence 
after the one where you stopped reading also tells you what to do.  one 
might suspect that you don't really want to unsubscribe from this list...

</F>



From stargaming at gmail.com  Tue Jan 16 11:22:58 2007
From: stargaming at gmail.com (Stargaming)
Date: Tue, 16 Jan 2007 17:22:58 +0100
Subject: arguments of a function/metaclass
In-Reply-To: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>
References: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>
Message-ID: <eoiu53$h8$1@ulysses.news.tiscali.de>

rubbishemail at web.de schrieb:
> Hello,
> 
> 
> I have a member function with many (20) named arguments
> 
> def __init__(self,a=1,b=2):
>     self.a=a
>     self.b=b
> 
> I would like to get rid of the many redundant lines like self.a=a and
> set the members automatically.
> The list of default arguments could be given like
> 
> def __init__(**kwargs):
>     arglist={"a":1,"b":2]
> 
> if this makes things easier
> 
> Of course there has to be a check that raises an error in case of an
> unknown argument not mentioned in this list.
> 
> 
> I am sure there is an elegant way how to do this, could you give me any
> hints???
> 
> 
> Many thanks
> 
> 
> 
> Daniel
> 

If it's a long list of arguments, it will stay a long list (i. e. 
representation) of arguments, whatever you do. You could minimize your 
layout, though, to e. g. use a decorator that takes a list of arguments 
automatically saved to self.
But that's just a "layout" (or design) issue and it will stay clumsy, 
whatever you do (perhaps splitting up the dict to many lines will make 
it more readable, but that's it).

To bring up a more liberate attempt, why don't you just save *all* args 
received (self.__dict__.update(kwargs)). If the user provides more 
arguments -- nevermind!
You would have to do something about default values though and here you 
got to use the list again, first updating self.__dict__ with the list 
and afterwards with kwargs.

Stargaming


From gandalf at designaproduct.biz  Thu Jan 25 11:42:12 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Thu, 25 Jan 2007 17:42:12 +0100
Subject: Two dimensional lists
In-Reply-To: <be5994b50701250817l54b5c8a9g359b917eb8fdda75@mail.gmail.com>
References: <be5994b50701250817l54b5c8a9g359b917eb8fdda75@mail.gmail.com>
Message-ID: <45B8DDE4.9000903@designaproduct.biz>


> # shouldn't I be able to fill the lists simply by pointing to a location?
>
> matrix[a_idx, p_idx] = 0x219 # and so on?
>   
Lists are not matrices. For example:

L = [  [1,2,3], ['a','b','c'], 10 ]
print L[1][2] # Prints 'c', you will like this syntax but...
print L[2][5] # TypeError: 10 is not subscriptable

You can create a function that creates a "list of lists" filled with 
zeros, and then use this data structure as a matrix.

BUT! If you need to use matrices filled with numbers, try numarray:

http://www.stsci.edu/resources/software_hardware/numarray

Numarray is much more efficient for this task.

Best,

   Laszlo



From Barry.Carroll at psc.com  Fri Jan  5 19:22:11 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Fri, 5 Jan 2007 16:22:11 -0800
Subject: What is proper way to require a method to be overridden?
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A63@eugsrv400.psc.pscnet.com>

> -----Original Message-----
> From: python-list-bounces+barry.carroll=psc.com at python.org
[mailto:python-
> list-bounces+barry.carroll=psc.com at python.org] On Behalf Of Fuzzyman
> Sent: Friday, January 05, 2007 4:05 PM
> To: python-list at python.org
> Subject: Re: What is proper way to require a method to be overridden?
> 
> 
> Carl Banks wrote:
> > jeremito wrote:
> > > I am writing a class that is intended to be subclassed.  What is
the
> > > proper way to indicate that a sub class must override a method?
> >
> > You can't (easily).
> >
> 
> Well...
> 
> How about not defining it on the base class, but check in the
> constructor that the attribute exists and that it is of type
> FunctionType ?
> 
> Fuzzyman
> http://www.voidspace.org.uk/python/articles.shtml
> 
> --
> http://mail.python.org/mailman/listinfo/python-list

Greetings:

Thomas Christopher's book "Python Programming Patterns" has an example
of this that I like.  On page 72 he shows code for a class, AbstractSet,
which he later subclasses in ListSet and DictSet.  Each of the methods
intended for subclassing simply to raise a NotImplementedError, e.g.:

    def insert(self,x): raise NotImplementedError, "set.insert"

In this way the superclass's interface is well defined (the methods and
their parameters are all listed, but if invoked before they are
overwritten, they abort with a useful error message.  Pretty slick,
IMHO.

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed





From Ingo.Wolf at gmx.de  Wed Jan 17 11:56:51 2007
From: Ingo.Wolf at gmx.de (iwl)
Date: 17 Jan 2007 08:56:51 -0800
Subject: predefined empty base class ??
Message-ID: <1169053011.399278.290980@a75g2000cwd.googlegroups.com>

Hi,

is there an predefined empty base class
which I can instanziate to have an 
container i can copy attributes in?



From skip at pobox.com  Tue Jan  9 09:39:19 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 9 Jan 2007 08:39:19 -0600
Subject: Using with CSV library in Python 2.2!!!
In-Reply-To: <1168352108.295247.280690@51g2000cwl.googlegroups.com>
References: <1168348224.843657.27330@42g2000cwt.googlegroups.com>
	<mailman.2481.1168351180.32031.python-list@python.org>
	<1168352108.295247.280690@51g2000cwl.googlegroups.com>
Message-ID: <17827.43287.949653.793293@montanaro.dyndns.org>


    mohan> Thanks man. What kind of source code changes should I do to
    mohan> "_csv.c" file , have you any idea on that too??

I've no particular ideas.  There are sometimes small C API changes between
feature releases though.  If you read through the What's New document for
version 2.3 (google for it) you;ll probably have a pretty good idea of any
such changes.

    mohan> Otherwise upgrading to Python 2.4 would be the easiest choice.

Oh, you didn't mention that.  By all means, upgrade to 2.4 or 2.5 instead of
trying to backport the csv module to an outdated Python version.

Skip


From gagsl-py at yahoo.com.ar  Mon Jan 29 23:53:47 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 01:53:47 -0300
Subject: sending a class as an argument
References: <1170044663.163303.131930@v45g2000cwv.googlegroups.com>
Message-ID: <op.tmwgmjo3sd1mbx@gabriel2.softlabbsas.com.ar>

En Mon, 29 Jan 2007 01:24:23 -0300, manstey <manstey at csu.edu.au> escribi?:

>
> Our class has its attributes set as classes, as in
>
> MyClass.Phone.Value='34562346'
> MyClass.Phone.Private=True
>
> Inside the MyClass definition we have a function like this:
>
> def MyFunc(self,clsProperty):
>    if clsProperty.Private:
>         print 'Private property'
>    else:
>         print ClsProperty.Value

This method does not use `self` at all, and that's rather suspicious for  
an instance method.
And you set properties on the class itself? So you never create instances  
of that class?

> In our code, we then call
>>>> MyClass.MyFunc(MyClass.Phone)
>
> We want to be able in our code instead simply to call:
>>>> MyClass.MyFunc(Phone) or MyClass.MyFunc('Phone')
>
> But we can't get it to work. If we rewrite the function as follows:
>
> def MyFunc(self,attr):
>    if self.attr.Private:
>       print 'Private'
>    else:
>       print self.attr.Value
>
> we get an error.

Surely an AttributeError, because you dont have any attribute named "attr".
Notice that on this version you are using `self`, but on the above version  
you didnt use it.
There are easy ways in Python to access an attribute by name, but I think  
that this would just add more noise to your code. Please tell us about  
your design, or rethink it. Do actually exist instances of MyClass, or  
not? I can imagine "Phone" being an attribute of a certain instance of  
Person, by example, but not a class attribute.

> Is there a better way to do this? Thanks
Surely, but we need to know your goal, what do you really want to do, not  
how do you think you should do that.

-- 
Gabriel Genellina



From grahamd at dscpl.com.au  Fri Jan 26 16:32:36 2007
From: grahamd at dscpl.com.au (Graham Dumpleton)
Date: 26 Jan 2007 13:32:36 -0800
Subject: xml.dom.minidom.parseString segmentation fault on mod_python
In-Reply-To: <1169809222.955833.176380@j27g2000cwj.googlegroups.com>
References: <1169804514.862290.274940@q2g2000cwa.googlegroups.com>
	<1169809222.955833.176380@j27g2000cwj.googlegroups.com>
Message-ID: <1169847155.992129.68440@l53g2000cwa.googlegroups.com>



On Jan 26, 10:00 pm, "Ziga Seilnacht" <ziga.seilna... at gmail.com>
wrote:
> On Jan 26, 10:41 am, qert... at gmail.com wrote:
>
> > Python 2.4.4
> >mod_python3.2.10  +  Apache 2.0
>
> > def index( req, **params ):
> >     from xml.dom.minidom import parseString
> >     doc = parseString( "whatever" )
>
> > => blank screen, _no_any_exception_; Apache error_log:
> > [Fri Jan 26 10:18:48 2007] [notice] child pid 17596 exit signal
> > Segmentation fault (11)
>
> > Outsidemod_pythoncode works well. Any ideas? I would be grateful.http://www.python.org/sf/1558223http://www.python.org/sf/1295808http://www.python.org/sf/1075984
>
> Try to compile all your dependencies against the same version of
> Expat or upgrade to python 2.5.

For further information read:


http://www.dscpl.com.au/wiki/ModPython/Articles/ExpatCausingApacheCrash

Graham



From david at boddie.org.uk  Thu Jan 11 08:00:22 2007
From: david at boddie.org.uk (David Boddie)
Date: 11 Jan 2007 05:00:22 -0800
Subject: creating simple Python scripting interfaces via C++
References: <1168272267.679069.325890@38g2000cwa.googlegroups.com>
	<1168515833.590286.123330@o58g2000hsb.googlegroups.com>
Message-ID: <1168520420.006334.191000@i56g2000hsf.googlegroups.com>

Ben Sizer wrote:  > And is there anywhere else more appropriate that I
should be asking > this question, given the lack of responses to this
and my other embedding > topic so far?  You could try asking on the C++
SIG mailing list at python.org:
http://mail.python.org/mailman/listinfo/c++-sig  David



From eight02645999 at yahoo.com  Sat Jan 20 00:09:53 2007
From: eight02645999 at yahoo.com (eight02645999 at yahoo.com)
Date: 19 Jan 2007 21:09:53 -0800
Subject: regexp qns
References: <1169268024.164643.71320@l53g2000cwa.googlegroups.com>
	<eos6v7$4go$1@zinnia.noc.ucla.edu>
Message-ID: <1169269793.713444.152110@a75g2000cwd.googlegroups.com>

James Stroud wrote:
> eight02645999 at yahoo.com wrote:
> > hi
> > suppose i have a string like
> >
> > test1?test2t-test3*test4*test5$test6#test7*test8
> >
> > how can i construct the regexp to get test3*test4*test5 and
> > test7*test8, ie, i want to match * and the words before and after?
> > thanks
> >
>
>
> py> import re
> py> s = 'test1?test2t-test3*test4*test5$test6#test7*test8'
> py> r = re.compile(r'(test\d(?:\*test\d)+)')
> py> r.findall(s)
> ['test3*test4*test5', 'test7*test8']
>
> James

thanks !
I check the regexp doc it says:
"""
(?:...)
    A non-grouping version of regular parentheses. Matches whatever
regular expression is inside the parentheses, but the substring matched
by the group cannot be retrieved after performing a match or referenced
later in the pattern.
"""
but i could not understand this : r'(test\d(?:\*test\d)+)'. which
parenthesis is it referring to? Sorry, could you explain the solution ?
thanks



From gisdudester at gmail.com  Wed Jan 31 00:18:52 2007
From: gisdudester at gmail.com (GISDude)
Date: 30 Jan 2007 21:18:52 -0800
Subject: PY Zip
Message-ID: <1170220732.552072.163560@k78g2000cwa.googlegroups.com>

Hi all.

I am trying to find a module that has a Zip utility that I can use in
Python. I would like to be able to call the module and ZIP up a
directory. I thought there was such a module, but I have not been able
to find it.

I need this to be able to be used in Python Win. Is there a ZIP utilty
already stored with a basic PYTHON download?

Thanks all.



From kbk at shore.net  Thu Jan  4 22:40:49 2007
From: kbk at shore.net (Kurt B. Kaiser)
Date: Thu, 4 Jan 2007 22:40:49 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200701050340.l053en59025586@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  418 open ( +5) /  3522 closed ( +1) /  3940 total ( +6)
Bugs    :  959 open (+13) /  6405 closed ( +5) /  7364 total (+18)
RFE     :  250 open ( +2) /   245 closed ( -1) /   495 total ( +1)

New / Reopened Patches
______________________

update to PEP 344 - exception attributes  (2007-01-02)
CLOSED http://python.org/sf/1626538  opened by  Jim Jewett

backticks will not be used at all  (2007-01-03)
       http://python.org/sf/1627052  opened by  Jim Jewett

Fix for #1601399 (urllib2 does not close sockets properly)  (2007-01-03)
       http://python.org/sf/1627441  opened by  John J Lee

Win32: Fix build when you have TortoiseSVN but no .svn/*  (2007-01-04)
       http://python.org/sf/1628061  opened by  Larry Hastings

Win32: Add bytesobject.c to pythoncore.vcproj  (2007-01-04)
       http://python.org/sf/1628062  opened by  Larry Hastings

socket.readline() interface doesn't handle EINTR properly  (2007-01-04)
       http://python.org/sf/1628205  opened by  Maxim Sobolev

Patches Closed
______________

update to PEP 344 - exception attributes  (2007-01-02)
       http://python.org/sf/1626538  closed by  ping

New / Reopened Bugs
___________________

sqlite3 documentation omits: close(), commit(), autocommit  (2006-12-30)
       http://python.org/sf/1625205  opened by  kitbyaydemir

re module documentation on search/match is unclear  (2006-12-31)
       http://python.org/sf/1625381  opened by  Richard Boulton

'imp' documentation does not mention that lock is re-entrant  (2006-12-31)
       http://python.org/sf/1625509  opened by  Dustin J. Mitchell

add ability to specify name to os.fdopen  (2007-01-01)
       http://python.org/sf/1625576  opened by  Mark Diekhans

'Installing Python Modules' does not work for Windows  (2007-01-02)
       http://python.org/sf/1626300  opened by  Christopher Lambacher

Would you mind renaming object.h to pyobject.h?  (2007-01-02)
       http://python.org/sf/1626545  opened by  Anton Tropashko

posixmodule.c leaks crypto context on Windows  (2007-01-03)
       http://python.org/sf/1626801  opened by  Yitz Gale

website issue reporter down  (2007-01-03)
       http://python.org/sf/1627036  opened by  Jim Jewett

mention side-lists from python-dev description  (2007-01-03)
       http://python.org/sf/1627039  opened by  Jim Jewett

xml.dom.minidom parse bug  (2007-01-03)
CLOSED http://python.org/sf/1627096  opened by  Pierre Imbaud

xml.dom.minidom parse bug  (2007-01-03)
CLOSED http://python.org/sf/1627244  opened by  Pierre Imbaud

an extra comma in condition command crashes pdb  (2007-01-03)
       http://python.org/sf/1627316  opened by  Ilya Sandler

Typo in module index for Carbon.CarbonEvt  (2007-01-03)
CLOSED http://python.org/sf/1627373  opened by  Brett Cannon

Status bar on OSX garbled  (2007-01-03)
       http://python.org/sf/1627543  opened by  sigzero

RotatingFileHandler cannot recover from failed doRollover()  (2007-01-03)
       http://python.org/sf/1627575  opened by  Forest Wilkinson

documentation error for "startswith" string method  (2007-01-04)
CLOSED http://python.org/sf/1627690  opened by  Keith Briggs

plat-mac videoreader.py auido format info  (2007-01-04)
       http://python.org/sf/1627952  opened by  Ryan Owen

documentation error for "startswith" string method  (2007-01-04)
       http://python.org/sf/1627956  opened by  Keith Briggs

Bugs Closed
___________

test_logging hangs on cygwin  (2006-04-06)
       http://python.org/sf/1465643  closed by  sf-robot

xml.dom.minidom parse bug  (2007-01-03)
       http://python.org/sf/1627096  closed by  loewis

xml.dom.minidom parse bug  (2007-01-03)
       http://python.org/sf/1627244  closed by  nnorwitz

Typo in module index for Carbon.CarbonEvt  (2007-01-03)
       http://python.org/sf/1627373  closed by  nnorwitz

documentation error for "startswith" string method  (2007-01-04)
       http://python.org/sf/1627690  closed by  loewis

Logging problem on Windows XP  (2006-09-27)
       http://python.org/sf/1566280  closed by  loewis

New / Reopened RFE
__________________

smarter temporary file object  (2001-04-12)
       http://python.org/sf/415692  reopened by  gvanrossum

optparse "store" action should not gobble up next  option  (2007-01-03)
       http://python.org/sf/1627266  opened by  Raghuram Devarakonda



From http  Thu Jan 25 19:58:21 2007
From: http (Paul Rubin)
Date: 25 Jan 2007 16:58:21 -0800
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
	<ep9t4g$uf$1@gemini.csx.cam.ac.uk>
	<1169751828.986583.47200@j27g2000cwj.googlegroups.com>
	<epb0s7$g2s$1@gemini.csx.cam.ac.uk>
	<1169754601.992058.205640@q2g2000cwa.googlegroups.com>
	<7xsldy7u6f.fsf@ruckus.brouhaha.com>
	<1169758010.223732.272340@k78g2000cwa.googlegroups.com>
	<7xveiu4xis.fsf@ruckus.brouhaha.com>
	<mailman.3176.1169771514.32031.python-list@python.org>
Message-ID: <7xodomeh8y.fsf@ruckus.brouhaha.com>

skip at pobox.com writes:
> What makes you think Paddy indicated he wouldn't try to solve the problem?
> Here's what he wrote:
> 
>     What I'm proposing is that if, for example, a process stops running
>     three times in a year at roughly three to four months intervals , and it
>     should have stayed up; then restart the server sooner, at aa time of
>     your choosing, whilst taking other measures to investicate the error.

Well, ok, that's better than just rebooting every so often and leaving
it at that, like the firmware systems he cited.

> I see nothing wrong with trying to minimize the chances of a problem

I think a measure to minimize the chance of some problem is only valid
if there's some plausible theory that it WILL decrease the chance of
the problem (e.g. if there's reason to think that the problem is
caused by a very slow resource leak, but that hasn't been suggested).
That's the part that I'm missing from this story.

One thing I'd certainly want to do is set up a test server under a
much heavier load than the real server sees, and check whether the
problem occurs faster.


From gagsl-py at yahoo.com.ar  Tue Jan 23 00:39:51 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 23 Jan 2007 02:39:51 -0300
Subject: Removing outdated files
In-Reply-To: <45b59949@griseus.its.uu.se>
References: <45b59949@griseus.its.uu.se>
Message-ID: <7.0.1.0.0.20070123023901.0423a4b8@yahoo.com.ar>

At Tuesday 23/1/2007 02:17, Jan Danielsson wrote:

>    I've been looking at the datetime.date class, but I can't see any
>easy way to parse the week number from it. I could calculate this
>information by brute force -- but I get a feeling that there are
>functions in Python to extract week numbers from a date.

.isocalendar()


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From S.Mientki-nospam at mailbox.kun.nl  Sat Jan  6 17:27:30 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sat, 06 Jan 2007 23:27:30 +0100
Subject: still struggling, howto use a list-element as a name ?
In-Reply-To: <I_Unh.390$_B1.309@read3.inet.fi>
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
	<45a01981$0$296$426a74cc@news.free.fr>
	<I_Unh.390$_B1.309@read3.inet.fi>
Message-ID: <441e$45a02246$d443bb3a$24795@news.speedlinq.nl>

Jussi Salmela wrote:
> Bruno Desthuilliers kirjoitti:
>> Stef Mientki a ?crit :
>>> In the example below, "pin" is an object with a number of properties.
>>> Now I want
>>> 1- an easy way to create objects that contains a number of these "pin"
>>> 2- an multiple way to access these "pin", i.e.
>>>         device.pin[some_index]
>>>     device.some_logical_name
>>> ad 1:
>>> a dictionary (as "pinlist" in the example) seems a very 
>>> convenient     way (from a viewpoint of the device creator).
>>> As you can see in the "__init__" section this dictionary can easily 
>>> be transported to the pin-objects.
>>>
>>> ad 2:
>>> THAT's the problem: how do automate these lines "self.GND = self.pin[0]"
>>>
>>> I'm also in for other solutions.
>>
>> I'm afraid I don't understand your design (nor the domain FWIW). 
> ditto
>> <snip>
>>
>> But the whole thing still looks awfully convulted and kludgy to me, 
>> and I suspect serious design flaws... Why don't you try and explain  
>> your real problem, instead of asking how to implement what you *think* 
>> is the solution ?
> ditto

thank you all guys.
I'm just doing some exercises in Python,
and therefor I'm trying to rewrite some programs
I've written in other languages into Python.

The first program I tried to convert was a MatLab program,
which could almost be written identical in Python.
Even with my little experience in Python,
I can tell you that it could have been written in Python
in a much better way, but I deliberately did not,
to show other people who are familiar with MatLab.

The second example I'm now exercising with,
is a simulator of (electrical) circuits,
which I build in Delphi
   http://oase.uci.kun.nl/~mientki/data_www/pic/jalss/jalss.html





> 
> Cheers,
> Jussi


From streamservenl at gmail.com  Wed Jan 31 05:04:53 2007
From: streamservenl at gmail.com (jvdb)
Date: 31 Jan 2007 02:04:53 -0800
Subject: Help needed on config files
Message-ID: <1170237893.930122.138300@v45g2000cwv.googlegroups.com>

Hi there,

I am quite new on python programming and need some help on solving my
problem..

I have to make a (python) program which deletes files from
directories. I don't think deleting, etc. is the problem. The problem
is that the directories where i have to delete them are 'dynamic'/
subject to change. So what i thought is to make a config file
containing an identifier (useful for myself) and there the directory.
something like:
[PROJECTx]
<path>
[PROJECTy]
<path>

I have already seen that there are sorts of modules where you can read
a config file, but only when you know the key.. Can someone help me
out on this? The configfile can be altered in time (as there are more
projects coming where i have to delete files on a scheduled basis).

This is a good learning project for me, but i really don't see how to
solve this.



From no-spam at no-spam-no-spam.invalid  Fri Jan 12 06:48:44 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 12 Jan 2007 12:48:44 +0100
Subject: Parallel Python
In-Reply-To: <1168597288.571937.176430@s34g2000cwa.googlegroups.com>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
	<1168597288.571937.176430@s34g2000cwa.googlegroups.com>
Message-ID: <eo7sj1$vn6$1@news.albasani.net>

Paul Boddie wrote:
> parallelpyt... at gmail.com wrote:
>> The main difference between MPI python solutions and ppsmp is that with
>> MPI you have to organize both computations
>> {MPI_Comm_rank(MPI_COMM_WORLD, &id); if id==1 then ... else ....} and
>> data distribution (MPI_Send / MPI_Recv) by yourself. While with ppsmp
>> you just submit a function with arguments to the execution server and
>> retrieve the results later.
> 
> Couldn't you just provide similar conveniences on top of MPI? Searching
> for "Python MPI" yields a lot of existing work (as does "Python PVM"),
> so perhaps someone has already done so. Also, what about various grid
> toolkits?
> 
> [...]
> 
>> Overall ppsmp is still work in progress and there are other interesting
>> features which I would like to implement. This is the main reason why I
>> do not open the source of ppsmp - to have better control of its future
>> development, as advised here: http://en.wikipedia.org/wiki/Freeware :-)
> 
> Despite various probable reactions from people who will claim that
> they're comfortable with binary-only products from a single vendor, I
> think more people would be inclined to look at your software if you did
> distribute the source code, even if they then disregarded what you've
> done. My own experience with regard to releasing software is that even
> with an open source licence, most people are likely to ignore your
> projects than to suddenly jump on board and take control, and even if
> your project somehow struck a chord and attracted a lot of interested
> developers, would it really be such a bad thing? Many developers have
> different experiences and insights which can only make your project
> better, anyway.
> 
> Related to your work, I've released a parallel execution solution
> called parallel/pprocess [1] under the LGPL and haven't really heard
> about anyone really doing anything with it, let alone forking it and
> showing my original efforts in a bad light. Perhaps most of the
> downloaders believe me to be barking up the wrong tree (or just
> barking) with the approach I've taken, but I think the best thing is to
> abandon any fears of not doing things the best possible way and just be
> open to improvements and suggestions.
> 
> Paul
> 
> [1] http://www.python.org/pypi/parallel

I'd be interested in an overview.
For ease of use a major criterion for me would be a pure python 
solution, which also does the job of starting and controlling the 
other process(es) automatically right (by default) on common 
platforms.
Which of the existing (RPC) solutions are that nice?


Robert


From wojciech_mula at poczta.null.onet.pl.invalid  Mon Jan 29 09:10:34 2007
From: wojciech_mula at poczta.null.onet.pl.invalid (Wojciech =?ISO-8859-2?Q?Mu=B3a?=)
Date: Mon, 29 Jan 2007 14:10:34 +0000 (UTC)
Subject: Conversion of string to integer
References: <1170078933.180025.229830@k78g2000cwa.googlegroups.com>
Message-ID: <slrnerrvrq.375.wojciech_mula@cat.tac>

jupiter wrote:
> I have a problem. I have a list which contains strings and numeric. 
> What I want is to compare them in loop, ignore string and create 
> another list of numeric values.
>
> I tried int() and decimal() but without success.
>
> eq of problem is
>
> #hs=string.split(hs)
> hs =["popopopopop","254.25","pojdjdkjdhhjdccc","25452.25"]

tmp = []
for s in hs:
	try:
		tmp.append( float(s) )
	except ValueError:
	# function float raises VE, if string 's' doesn't
	# represent a number
		pass

# tmp contains a list of floats


From webb.sprague at gmail.com  Wed Jan  3 18:52:17 2007
From: webb.sprague at gmail.com (_)
Date: 3 Jan 2007 15:52:17 -0800
Subject: Dumping objects into spreadsheet readable text (design question)
Message-ID: <1167868337.342308.267230@s34g2000cwa.googlegroups.com>

Hi Pythonistas and Pythonistos,

I am doing some fairly complex statistical analyses and trying to
display the output in a form readable to technicians not yet
enlightened by the wonders of python (ie they still use either Excel,
S-PLUS/R, or Matlab only).  I need to dump the results into text such
that these users can do further processing, and I am looking for ideas
on good ways to do this.

Note that formatting and displaying simple lists of named coeffecients
or tables would easy; the problem is that these analyses (Lee-Carter
mortality forecasts, for anyone who cares) require at least a single
two-dimensional matrix of rates and ~12 scalar coefficients, and they
generate 4 two-dimensional matrices, several three-dimensional
matrices, and 20 or so scalar coefficients.  Each of these pieces of
data also has a canonical name with which they must be labeled in the
output.  All of these pieces of data go together.  Finally, I would
like to find some way to do this generally, so when my boss comes up
with a new analysis I can re-use this text dump code.

Has anybody done this?

I am thinking of using cheetah, but I am still pondering design, hoping
for list inspiration!

pprint won't work because users will want to import into a spreadsheet,
and it displays lots of "{" etc.

Feel free to cc me on the reply, as I read the list as digest.

TIA



From gagsl-py at yahoo.com.ar  Mon Jan 22 17:34:20 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 22 Jan 2007 19:34:20 -0300
Subject: How to use time.clock() function in python
In-Reply-To: <1169503516.425217.218790@q2g2000cwa.googlegroups.com>
References: <1169503516.425217.218790@q2g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070122192923.04bf5888@yahoo.com.ar>

At Monday 22/1/2007 19:05, yinglcs at gmail.com wrote:

>I am following this python example trying to time how long does an
>operation takes, like this:
>
>My question is why the content of the file (dataFile) is just '0.0'?
>I have tried "print >>dataFile, timeTaken" or "print >>dataFile,str(
>timeTaken)", but gives me 0.0.
>Please tell me what am I missing?
>
>
>         t1 = time.clock()
>         os.system(cmd)
>
>         outputFile = str(i) + ".png"
>
>         t2 = time.clock()
>
>         timeTaken = t2 - t1
>         allTimeTaken += timeTaken
>         print >>dataFile, timeTaken

time.clock() may not give you enough precision; see this recent post
http://mail.python.org/pipermail/python-list/2007-January/422676.html
Use the timeit module instead.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From nanjundi at gmail.com  Sun Jan 28 09:18:25 2007
From: nanjundi at gmail.com (Nanjundi)
Date: 28 Jan 2007 06:18:25 -0800
Subject: Getting to an SSH account over a HTTP proxy
In-Reply-To: <mailman.3143.1169716454.32031.python-list@python.org>
References: <mailman.2985.1169469575.32031.python-list@python.org>
	<1169514995.916358.17030@11g2000cwr.googlegroups.com>
	<mailman.3143.1169716454.32031.python-list@python.org>
Message-ID: <1169993905.595465.23650@m58g2000cwm.googlegroups.com>



> problem. I do not want to create my own SSH client and, AFAICT, there
> is no SSH client in Twisted. The library also seem to have some
> problems with handling HTTP proxies in a transparent way:http://twistedmatrix.com/trac/ticket/1774
>
> --
> mvh Bj?rn


There is a ssh implementation in twisted.
http://twistedmatrix.com/users/z3p/files/conch-talk.html

Are you able to authenticate and run commands using a ssh client on 
port 80?
I will try to post an example if possible.
-N



From skip at pobox.com  Tue Jan 30 18:26:17 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 30 Jan 2007 17:26:17 -0600
Subject: PythonCard
In-Reply-To: <1170193549.583822.156450@k78g2000cwa.googlegroups.com>
References: <1170193549.583822.156450@k78g2000cwa.googlegroups.com>
Message-ID: <17855.54297.627316.697850@montanaro.dyndns.org>


    Tequila> I'm having some trouble starting PythonCard on my PC.  I've
    Tequila> downloaded and ran python-2.5.msi to install Python on my
    Tequila> machine.  And PythonCard-0.8.2.win32.exe to install PythonCard.
    ...
    Tequila>     import wx
    Tequila> ImportError: No module named wx

    Tequila> Does anyone know what the problem might be?

Sorta looks like you need to install wxPython.  In fact, the Windows
instructions for PythonCard mention downloading wxPython before downloading
PythonCard itself:

    http://pythoncard.sourceforge.net/windows_installation.html

If you're confident wxPython *is* installed, check to make sure it's
installed somewhere that Python will find it.

Skip


From jairodsl at gmail.com  Sat Jan 13 18:24:08 2007
From: jairodsl at gmail.com (jairodsl)
Date: 13 Jan 2007 15:24:08 -0800
Subject: Comparing a matrix (list[][]) ?
Message-ID: <1168730648.038901.187460@v45g2000cwv.googlegroups.com>

Hi,

How can I find the minus element greater than zero in a matrix, my
matrix is

matrix=
[9,8,12,15],
[0,11,15,18],
[0,0,10,13],
[0,0,0,5]

I dont want to use "min" function because each element in the matrix is
associated to (X,Y) position.

Thanks a lot.

jDSL



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Jan 11 12:27:27 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 11 Jan 2007 18:27:27 +0100
Subject: Read from database, write to another database, simultaneously
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
	<50l9dlF1fuc1sU1@mid.individual.net> <9ihph.72$fo1.64@newsfe03.lga>
	<1168518426.111465.290430@o58g2000hsb.googlegroups.com>
Message-ID: <50nabvF1g30l4U5@mid.individual.net>

Sean Davis wrote:

> I solved this problem by creating a temporary file as an
> intermediary, but why wait for Oracle to finish dumping data when
> I can potentially be loading into postgres at the same time that
> the data is coming in?  So, I am actually 
> looking for a solution to this problem that doesn't require an
> intermediate file and allows simultaneous reading and writing,
> with the caveat that the data cannot all be read into memory
> simultaneously, so will need to be buffered.

The functions you use don't seem very suited for such a
streaminglike task.

Regards,


Bj?rn

-- 
BOFH excuse #282:

High altitude condensation from U.S.A.F prototype aircraft has
contaminated the primary subnet mask. Turn off your computer for 9
days to avoid damaging it.



From diesch at spamfence.net  Sun Jan  7 16:09:39 2007
From: diesch at spamfence.net (Florian Diesch)
Date: Sun, 07 Jan 2007 22:09:39 +0100
Subject: Python re expr from Perl to Python
References: <GzOnh.112$a81.91@nntpserver.swip.net>
Message-ID: <20070107210940.1596.4.NOFFLE@dieschf.news.arcor.de>

"Michael M." <michael at mustun.ch> wrote:

> In Perl, it was:
>
>
>   ## Example: "Abc | def | ghi | jkl"
>   ##       -> "Abc ghi jkl"
>   ## Take only the text betewwn the 2nd pipe (=cut the text in the 1st
> pipe).
>   $na =~ s/\ \|(.*?)\ \|(.*?)\ \|/$2/g;
>
>   ## -- remove [ and ] in text
>   $na =~ s/\[//g;
>   $na =~ s/\]//g;
>   # print "DEB: \"$na\"\n";
>
>
> # input string
> na="Abc | def | ghi | jkl [gugu]"
> # output
> na="Abc ghi jkl gugu"
>
>
> How is it done in Python?

>>> import re
>>> na="Abc | def | ghi | jkl [gugu]"
>>> m=re.match(r'(\w+ )\| (\w+ )\| (\w+ )\| (\w+ )\[(\w+)\]', na)
>>> na=m.expand(r'\1\2\3\5')
>>> na
'Abc def ghi gugu'



   Florian
-- 
<http://www.florian-diesch.de/>


From Elan at nomailnospam.com  Tue Jan  9 16:50:37 2007
From: Elan at nomailnospam.com (Elan Magavi)
Date: Tue, 09 Jan 2007 21:50:37 GMT
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
Message-ID: <N6Uoh.43209$wc5.29633@newssvr25.news.prodigy.net>


<octabox at gmail.com> wrote in message 
news:1168354695.334946.157400 at 51g2000cwl.googlegroups.com...
> Hello all,
>
> I represent Octabox, an Internet Start-up developing a wide-scale
> platform for Internet services.  We are very interested to know your
> thoughts on Internet productivity and how it might be improved, and to
> that end we have set up a short survey at our website -
> http://www.octabox.com/productivity_poll.php
> We would very much appreciate if you would take a couple of minutes to
> fill it up and influence our direction and empahsis.
>
> Thanks in advance,
> Octabox Development Team

Is that like.. OctaPussy?


> 




From sturlamolden at yahoo.no  Thu Jan 18 14:10:40 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 18 Jan 2007 11:10:40 -0800
Subject: How can I create a linked list in Python?
In-Reply-To: <7xps9dl04y.fsf@ruckus.brouhaha.com>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<eojb9v$92rq$1@netnews.upenn.edu>
	<45ad5104$0$393$426a74cc@news.free.fr>
	<1169009882.408482.43360@q2g2000cwa.googlegroups.com>
	<45ae8950$0$31033$426a74cc@news.free.fr>
	<1169074382.702857.313010@11g2000cwr.googlegroups.com>
	<7xps9dl04y.fsf@ruckus.brouhaha.com>
Message-ID: <1169147440.211108.137940@s34g2000cwa.googlegroups.com>


Paul Rubin wrote:

> But that's what Lisp does too.

Ok, I may have to reread Paul Graham's book on ANSI Common Lisp then.



From helgaorg at gmail.com  Mon Jan 29 18:12:37 2007
From: helgaorg at gmail.com (Pappy)
Date: 29 Jan 2007 15:12:37 -0800
Subject: printing to a redirected stdout from a process that was called with
	"2>&1 > /dev/null &"
Message-ID: <1170112357.792999.241280@s48g2000cws.googlegroups.com>

SHORT VERSION:
Python File B changes sys.stdout to a file so all 'prints' are written 
to the file.  Python file A launches python file B with os.popen("./B 
2>&^1 >dev/null &").  Python B's output disappears into never-never 
land.

LONG VERSION:
I am working on a site that can kick off large-scale simulations.  It 
will write the output to an html file and a link will be emailed to 
the user.  Also, the site will continue to display "Loading..." if the 
user wants to stick around.

The simulation is legacy, and it basically writes its output to stdout 
(via simple print statements).  In order to avoid changing all these 
prints, I simply change sys.stdout before calling the output 
functions.  That works fine.  The whole thing writes to an html file 
all spiffy-like.

On the cgi end, all I want my (python) cgi script to do is check for 
form errors, make sure the server isn't crushed, run the simulation 
and redirect to a loading page (in detail, I write a constantly 
updating page to the location of the final output file.  When the 
simulation is done, the constantly updating file will be magically 
replaced).  The root problem is that the popen mechanism described 
above is the only way I've found to truly 'Detach' my simulation 
process.  With anything else, Apache (in a *nix environment) sits and 
spins until my simulation is done.  Bah.

Any ideas?

_jason



From deets at nospam.web.de  Thu Jan 11 12:24:39 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 11 Jan 2007 18:24:39 +0100
Subject: COM compatibility
References: <1168535500.394266.10860@i39g2000hsf.googlegroups.com>
Message-ID: <50na6nF1grh00U1@mid.uni-berlin.de>

Tmack wrote:

> I'm not a programmer!
> 
> I work for a software company. We have a SDK that customers can use to
> customize the app. The requirement to use the SDK is:
> 
> XYZ App has been designed in such a way that all the business objects
> used
> in the application are automatically exposed through a thin COM wrapper
> created
> automatically during the application build process. This means that
> using the
> XYZ App SDK is very efficient, and all the same underlying objects and
> properties that the application's programmers use to build the XYZ App
> user
> interface are also available to third-party programmers via the SDK.
> 
> Does it sound like Python would allow me use the apps SDK?

It sounds as if it is possible scripting it with python using Mark Hammond's
win32, yes. 

Diez


From mail at microcorp.co.za  Fri Jan 12 00:03:11 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 12 Jan 2007 07:03:11 +0200
Subject: Is there a way to protect a piece of critical code?
References: <mailman.2524.1168424917.32031.python-list@python.org><eo2pgf$j57$1@news.albasani.net><mailman.2558.1168494787.32031.python-list@python.org><7xzm8q6pw7.fsf@ruckus.brouhaha.com>
	<7xsleiysz8.fsf@ruckus.brouhaha.com>
Message-ID: <003d01c73606$f589c920$03000080@hendrik>

 "Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote:


> Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> >     def get_from_queue(queue):
> >        try:
> >           return queue.get(block=False)
> >        except Queue.Empty:
> >           return QUEUE_IS_EMPTY
> 
> Alternatively:
> 
>      def get_from_queue(queue):
>         try:
>            return (queue.get(block=False), True)
>         except Queue.Empty:
>            return (None, False)
> 
> This is maybe a nicer interface (no special sentinel value needed).
> You'd use
> 
>      value, nonempty = get_from_queue(queue)
>       
> if nonempty is true then the item is valid.
> 
Hey, this is even nicer - thanks!

- Hendrik 



From gonzlobo at gmail.com  Mon Jan  1 13:36:15 2007
From: gonzlobo at gmail.com (gonzlobo)
Date: Mon, 1 Jan 2007 11:36:15 -0700
Subject: Writing more efficient code
Message-ID: <be5994b50701011036j66dfee8chfaf0977e4942e5bc@mail.gmail.com>

Greetings, and happyNewYear to all.

I picked up Python a few weeks ago, and have been able to parse large
files and process data pretty easily, but I believe my code isn't too
efficient. I'm hoping dictionaries will help out, but I'm not sure the
best way to implement them.

I've been using a bunch of nested if/elif/else statements to select
slices (0317 & 03de) from a file, then parse the data (aa, hh, bb,
d2-d9) into parameters (a = airspeed, h = heading) & flags.

#sample file contents
0000007d 03 0317 aa aa aa aa aa hh hh hh bb bb
0000007e 06 03de d2 d3 d4 d5 d6 d7 d8 d9 10 11

# some pseudo code
if PID == '03de':
    flapsCmd = int(d3, 16)
   if flapsCmd == 0xc0:
      <flaps up code>
   elif flapsCmd == 0x03:
      <flaps down code>
if PID == '0317':
   airspeed == 'combine aa for airspeed & multiply by 0.1'
   heading == 'combine hh for heading'
   mach == 'combine bb for mach & multiply by 0.01'

Might dictionaries help in this case... say Label0317(parameterName,
slice (d3), scaleFactor(0.1))... I'd like to use them if they'll
replace the dozens of nested conditionals.  I have roughly 75
different parameters to decode from a file containing ~2.5 million
lines of data.

I know my pseudo code lacks details, but hopefully I'm getting my
point across...

(I suppose switch/select/case statements would help a bit, but python
doesn't seem to use them... not to start a religious war or anything).

Any help (or encouragement) is appreciated.


From Thomas.Ploch at gmx.net  Tue Jan  9 01:11:10 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Tue, 09 Jan 2007 07:11:10 +0100
Subject: private variables
In-Reply-To: <74E534EE-D260-409D-8E91-0182BB897B94@cs.hmc.edu>
References: <74E534EE-D260-409D-8E91-0182BB897B94@cs.hmc.edu>
Message-ID: <45A331FE.90509@gmx.net>

belinda thom schrieb:
> Hello,
> 
> In what version of python were private variables added?
> 
> Thanks,
> 
> --b
> 

With this question you stepped into a bee hive. :-)

Read the 'Why less emphasis on private data?' thread.

But I can't tell you, when this so called 'private variables' were added.

Thomas


From klaus at seistrup.dk  Sun Jan 28 08:40:30 2007
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Sun, 28 Jan 2007 13:40:30 +0000 (UTC)
Subject: IP address
References: <mailman.3244.1169978684.32031.python-list@python.org>
	<1169990510.352536.4760@a34g2000cwb.googlegroups.com>
Message-ID: <epi94e$6uk$1@minji.szn.dk>

Adam wrote:

> This will get your IP address:
>
> #######Code########
> print socket.gethostbyaddr(socket.gethostname())
> ('compname', [], ['192.168.1.2'])
> ########End Code########

It will return an IP address, but not necessarily the one you want:

#v+

klaus at home:~ $ python -c 'import socket; print socket.gethostbyaddr(socket.gethostname())'
('zdani.szn.dk', [], ['2001:1448:89::1'])
klaus at home:~ $

#v-

Cheers,

-- 
Klaus Alexander Seistrup
http://klaus.seistrup.dk/



From ljz at asfast.com  Thu Jan 11 01:43:44 2007
From: ljz at asfast.com (Lloyd Zusman)
Date: Thu, 11 Jan 2007 01:43:44 -0500
Subject: Joining threads but allowing signals to main thread?
Message-ID: <87irfeawrj.fsf@asfast.com>

I have a python-2.5 program running under linux in which I spawn a
number of threads.  The main thread does nothing while these subsidiary
threads are running, and after they all complete, the main thread will
then exit.

I know that I can manage this through the use of Thread.join(), but
when I do it as follows, the main thread doesn't respond to signals:

  import sys, time, signal, threading

  signaled = False

  class Signaled(Exception):
      pass

  def sighandler(signum, frame):
      global signaled
      print 'aborted!'
      signaled = True

  def sigtest():
      global signaled
      if signaled:
          raise Signaled

  def myfunc(arg):
      while True:
          try:
              sigtest()
              # do something
          except Signaled:
              return

  threads = []
  for a in sys.argv[1:]:
      t = threading.Thread(myfunc, args=(a,))
      threads.append(t)

  # do some initialization

  for s in (signal.SIGHUP,  \
            signal.SIGINT,  \
            signal.SIGQUIT, \
            signal.SIGTERM):
      signal.signal(s, sighandler)

  for t in threads:
      t.start()

  for t in threads:
      t.join()

  sys.exit(0)

However, if I get rid of the t.join() loop and replace the last three
executable lines of the program with these, the main thread responds to
signals just fine:

  ...

  while threading.activeCount() > 1:
      time.sleep(0.001)

  sys.exit(0)

Is there any way to allow my program to respond to signals without
having to busy-wait in the main thread?

Thanks in advance.


-- 
 Lloyd Zusman
 ljz at asfast.com
 God bless you.



From alexandre_irrthum at yahoo.com  Tue Jan 30 09:30:12 2007
From: alexandre_irrthum at yahoo.com (alexandre_irrthum at yahoo.com)
Date: 30 Jan 2007 06:30:12 -0800
Subject: Compiling extension with Visual C++ Toolkit Compiler - MSVCR80.dll
In-Reply-To: <1170107212.889990.45450@a75g2000cwd.googlegroups.com>
References: <1170103633.189538.216620@v45g2000cwv.googlegroups.com>
	<1170107212.889990.45450@a75g2000cwd.googlegroups.com>
Message-ID: <1170167412.537465.116710@a75g2000cwd.googlegroups.com>

Thanks for your answers Martin and Peter,

I figured out why python.exe was asking for MSVCR80.dll. The first 
time I compiled the library, MS Visual C++ Express 2005 was used 
during the build (despite my PATH pointing to MS Visual C++ Toolkit 
2003). When I removed Express 2005, I forgot to remove the build 
directory of my library. I've also had to remove and reinstall the C++ 
Toolkit, the platform SDK and the .NET Framework SDK and modify 
msvccompiler.py and my environment variables according to:

http://www.vrplumber.com/programming/mstoolkit/index.html

but finally it did work.

And Peter, your solution worked perfectly. A great alternative to 
installing all the MS libraries.

Cheers,

alex



From bill.mill at gmail.com  Thu Jan 18 17:59:52 2007
From: bill.mill at gmail.com (Bill  Mill)
Date: 18 Jan 2007 14:59:52 -0800
Subject: Regex Question
In-Reply-To: <mailman.2819.1169032820.32031.python-list@python.org>
References: <mailman.2540.1168446078.32031.python-list@python.org>
	<eo8vod$emn$1@zinnia.noc.ucla.edu>
	<1168976209.504793.51890@38g2000cwa.googlegroups.com>
	<mailman.2819.1169032820.32031.python-list@python.org>
Message-ID: <1169161192.284820.196970@m58g2000cwm.googlegroups.com>

Gabriel Genellina wrote:
> At Tuesday 16/1/2007 16:36, Bill  Mill wrote:
>
> > > py> import re
> > > py> rgx = re.compile('1?')
> > > py> rgx.search('a1').groups()
> > > (None,)
> > > py> rgx = re.compile('(1)+')
> > > py> rgx.search('a1').groups()
> >
> >But shouldn't the ? be greedy, and thus prefer the one match to the
> >zero? This is my sticking point - I've seen that plus works, and this
> >just confuses me more.
>
> Perhaps you have misunderstood what search does.
> search( pattern, string[, flags])
>          Scan through string looking for a location where the regular
> expression pattern produces a match
>
> '1?' means 0 or 1 times '1', i.e., nothing or a single '1'.
> At the start of the target string, 'a1', we have nothing, so the re
> matches, and returns that occurrence. It doesnt matter that a few
> characters later there is *another* match, even if it is longer; once
> a match is found, the scan is done.
> If you want "the longest match of all possible matches along the
> string", you should use findall() instead of search().
>

That is exactly what I misunderstood. Thank you very much.

-Bill Mill
bill.mill at gmail.com



From vpolukcht at gmail.com  Thu Jan 18 04:49:27 2007
From: vpolukcht at gmail.com (Victor Polukcht)
Date: 18 Jan 2007 01:49:27 -0800
Subject: One more regular expressions question
Message-ID: <1169113767.320500.71200@11g2000cwr.googlegroups.com>

I have a couple of strings like:

Unassigned Number (1)                                    32
No Route To Destination (3)                              12
Normal call clearing (16)                                   2654
User busy (17)                                                 630
No user respond (18)                                        5
User alerting no answer (19)                             16
Call rejected (21)                                             3
Destination out of order (27)                             1
Invalid number format (28)                                32
Normal unspecified (31)                                   32
No channel available (34)                                 2
Temporary failure (41)                                      11
Switching equipment congestion (42)                4
Resource unavailable unspecified (47)               2
Bearer capability not authorized (57)                 73
Incomp. dest. / Non-existent CUG (88)              1
Recovery on timer expiry (102)                          2
Interworking, unspecified (127)                          5

I need to get:
Error code (value in brackets) - Value - Message.

My actual problem is i can't get how to include space, comma, slash.



From smusnmrNOSPAM at yahoo.com  Wed Jan 10 02:25:16 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Wed, 10 Jan 2007 08:25:16 +0100
Subject: how to clean sys.path
References: <eo0eom$cirq$1@zam602.zam.kfa-juelich.de>
	<mailman.2489.1168367359.32031.python-list@python.org>
Message-ID: <eo24cu$fgju$1@zam602.zam.kfa-juelich.de>

Thank you Laszlo!

Take care,

siggi

"Laszlo Nagy" <gandalf at designaproduct.biz> schrieb im Newsbeitrag 
news:mailman.2489.1168367359.32031.python-list at python.org...
>
>>
>> So far, I know only the command >>>sys.path.append(r'c:....etc...'), but 
>> how to delete or insert at the beginning of the list, I know not.
>>
> You can delete a slice. For example,
>
> del sys.path[2:5]
>
> More about slicing: http://docs.python.org/ref/slicings.html
> sys.path is a regular list. List methods: 
> http://docs.python.org/tut/node7.html
>
> Best,
>
>   Laszlo
> 




From steven.bethard at gmail.com  Sun Jan 28 00:35:30 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 27 Jan 2007 22:35:30 -0700
Subject: distutils, sdist and tests
In-Reply-To: <mailman.3237.1169954787.32031.python-list@python.org>
References: <Jaudna0fMYmIBCbYnZ2dnUVZ_sKunZ2d@comcast.com>	<mailman.3235.1169934632.32031.python-list@python.org>	<udOdnWW5l4N-jCHYnZ2dnUVZ_v-tnZ2d@comcast.com>
	<mailman.3237.1169954787.32031.python-list@python.org>
Message-ID: <Ka6dnVhMa4-CqyHYnZ2dnUVZ_syunZ2d@comcast.com>

Robert Kern wrote:
> Steven Bethard wrote:
>> Robert Kern wrote:
>>> Steven Bethard wrote:
>>>> How do I get distutils to include my testing module in just the "sdist" 
>>>> distribution?
>>> Use a MANIFEST.
>>>
>>>   http://docs.python.org/dist/source-dist.html
> 
> Also, I just noted this tidbit:
> 
> """If you don't supply an explicit list of files (or instructions on how to
> generate one), the sdist command puts a minimal default set into the source
> distribution:
>   ...
>   * anything that looks like a test script: test/test*.py (currently, the
> Distutils don't do anything with test scripts except include them in source
> distributions, but in the future there will be a standard for testing Python
> module distributions)
>   ...
> """
> 
> So you can just stick test_argparse.py into a test/ directory. Having tested
> this, it appears to work (see below).

Yeah, I was trying to avoid having to put it in a test/ directory. When 
they're in the same directory, I can just run test_argparse.py and it 
tests the local one instead of the one I have installed in 
site-packages. When it's in a test/ directory, running 
test/test_argparse.py tests the one in site-packages.

I did try putting test_argparse.py in a test/ directory though, and it 
doesn't seem to solve the problem -- test_argparse.py gets put into 
site-packages with the "bdist" command:

 > python setup.py sdist
running sdist
warning: sdist: manifest template 'MANIFEST.in' does not exist (using 
default file list)
writing manifest file 'MANIFEST'
creating argparse-0.6.0
creating argparse-0.6.0\test
copying files to argparse-0.6.0...
copying README.txt -> argparse-0.6.0
copying argparse.py -> argparse-0.6.0
copying setup.py -> argparse-0.6.0
copying test\test_argparse.py -> argparse-0.6.0\test
creating 'dist\argparse-0.6.0.zip' and adding 'argparse-0.6.0' to it
adding 'argparse-0.6.0\argparse.py'
adding 'argparse-0.6.0\PKG-INFO'
adding 'argparse-0.6.0\README.txt'
adding 'argparse-0.6.0\setup.py'
adding 'argparse-0.6.0\test\test_argparse.py'
removing 'argparse-0.6.0' (and everything under it)

 > python setup.py bdist_dumb
running bdist_dumb
running build
running build_py
installing to build\bdist.win32\dumb
running install
running install_lib
creating build\bdist.win32\dumb
creating build\bdist.win32\dumb\Program Files
creating build\bdist.win32\dumb\Program Files\Python
creating build\bdist.win32\dumb\Program Files\Python\Lib
creating build\bdist.win32\dumb\Program Files\Python\Lib\site-packages
copying build\lib\argparse.py -> build\bdist.win32\dumb\Program 
Files\Python\Lib\site-packages
copying build\lib\test_argparse.py -> build\bdist.win32\dumb\Program 
Files\Python\Lib\site-packages
byte-compiling build\bdist.win32\dumb\Program 
Files\Python\Lib\site-packages\argparse.py to argparse.pyc
byte-compiling build\bdist.win32\dumb\Program 
Files\Python\Lib\site-packages\test_argparse.py to test_argparse.pyc
running install_egg_info
Writing build\bdist.win32\dumb\Program 
Files\Python\Lib\site-packages\argparse-0.6.0-py2.5.egg-info
creating 'dist\argparse-0.6.0.win32.zip' and adding '.' to it
adding 'Program 
Files\Python\Lib\site-packages\argparse-0.6.0-py2.5.egg-info'
adding 'Program Files\Python\Lib\site-packages\argparse.py'
adding 'Program Files\Python\Lib\site-packages\argparse.pyc'
adding 'Program Files\Python\Lib\site-packages\test_argparse.py'
adding 'Program Files\Python\Lib\site-packages\test_argparse.pyc'
removing 'build\bdist.win32\dumb' (and everything under it)


>> Using a MANIFEST appears to do the same thing as putting "test_argparse" 
>> into py_modules -- that is, it puts "test_argparse.py" into both "sdist" 
>> and "bdist" distributions. In "bdist" distributions it gets installed to 
>> the site-packages directory like any other module.
> 
> Are you sure that you don't have changes left over in your setup.py when you
> tested that?

Yep.  (Though I still cleared everything out and tried it again.) 
Here's what I got using an unmodified setup.py and the MANIFEST.in you 
suggested.  Note that the "bdist" version is putting test_argparse.py 
into site-packages.

 > type MANIFEST.in
include PKG-INFO
include *.txt
include *.py

 > python setup.py sdist
running sdist
reading manifest template 'MANIFEST.in'
warning: no files found matching 'PKG-INFO'
writing manifest file 'MANIFEST'
creating argparse-0.6.0
copying files to argparse-0.6.0...
copying LICENSE.txt -> argparse-0.6.0
copying README.txt -> argparse-0.6.0
copying argparse.py -> argparse-0.6.0
copying setup.py -> argparse-0.6.0
copying test_argparse.py -> argparse-0.6.0
creating 'dist\argparse-0.6.0.zip' and adding 'argparse-0.6.0' to it
adding 'argparse-0.6.0\argparse.py'
adding 'argparse-0.6.0\LICENSE.txt'
adding 'argparse-0.6.0\PKG-INFO'
adding 'argparse-0.6.0\README.txt'
adding 'argparse-0.6.0\setup.py'
adding 'argparse-0.6.0\test_argparse.py'
removing 'argparse-0.6.0' (and everything under it)

 > python setup.py bdist_dumb
running bdist_dumb
running build
running build_py
installing to build\bdist.win32\dumb
running install
running install_lib
creating build\bdist.win32\dumb
creating build\bdist.win32\dumb\Program Files
creating build\bdist.win32\dumb\Program Files\Python
creating build\bdist.win32\dumb\Program Files\Python\Lib
creating build\bdist.win32\dumb\Program Files\Python\Lib\site-packages
copying build\lib\argparse.py -> build\bdist.win32\dumb\Program 
Files\Python\Lib\site-packages
copying build\lib\test_argparse.py -> build\bdist.win32\dumb\Program 
Files\Python\Lib\site-packages
byte-compiling build\bdist.win32\dumb\Program 
Files\Python\Lib\site-packages\argparse.py to argparse.pyc
byte-compiling build\bdist.win32\dumb\Program 
Files\Python\Lib\site-packages\test_argparse.py to test_argparse.pyc
running install_egg_info
Writing build\bdist.win32\dumb\Program 
Files\Python\Lib\site-packages\argparse-0.6.0-py2.5.egg-info
creating 'dist\argparse-0.6.0.win32.zip' and adding '.' to it
adding 'Program 
Files\Python\Lib\site-packages\argparse-0.6.0-py2.5.egg-info'
adding 'Program Files\Python\Lib\site-packages\argparse.py'
adding 'Program Files\Python\Lib\site-packages\argparse.pyc'
adding 'Program Files\Python\Lib\site-packages\test_argparse.py'
adding 'Program Files\Python\Lib\site-packages\test_argparse.pyc'
removing 'build\bdist.win32\dumb' (and everything under it)


STeVe


From jason at tishler.net  Wed Jan 24 07:43:55 2007
From: jason at tishler.net (Jason Tishler)
Date: Wed, 24 Jan 2007 07:43:55 -0500
Subject: sys.path issue in cygwin
In-Reply-To: <002401c73f8f$b9f7da90$14fd0179@WANGSHUHAO>
References: <002401c73f8f$b9f7da90$14fd0179@WANGSHUHAO>
Message-ID: <20070124124355.GA1308@tishler.net>

Wang,

On Wed, Jan 24, 2007 at 04:14:48PM +0800, Wang Shuhao wrote:
> I successfully built and installed Python 2.2.3 in cygwin.
> [snip]
> Obviously, 'C/lib/python2.2/' is a wrong path. In fact my python is
> installed in /usr/local/lib/python2.2.3. The result of the issue is
> that when you run a program python can't find the module. So what I
> really want to know is where these path came from and how to fix it.

Why not use the Python that is part of the standard Cygwin distribution?

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From weekender_ny at yahoo.com  Mon Jan 15 23:46:45 2007
From: weekender_ny at yahoo.com (John)
Date: 15 Jan 2007 20:46:45 -0800
Subject: html + javascript automations = [mechanize + ?? ] or something
	else?
In-Reply-To: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
Message-ID: <1168922805.176693.149060@q2g2000cwa.googlegroups.com>


I am curious about the webbrowser module. I can open up firefox
using webbrowser.open(), but can one control it? Say enter a
login / passwd on a webpage? Send keystrokes to firefox?
mouse clicks?

Thanks,
--j

John wrote:
> I have to write a spyder for a webpage that uses html + javascript. I
> had it written using mechanize
> but the authors of the webpage now use a lot of javascript. Mechanize
> can no longer do the job.
> Does anyone know how I could automate my spyder to understand
> javascript? Is there a way
> to control a browser like firefox from python itself? How about IE?
> That way, we do not have
> to go thru something like mechanize?
> 
> Thanks in advance for your help/comments,
> --j



From paddy3118 at netscape.net  Fri Jan  5 01:20:51 2007
From: paddy3118 at netscape.net (Paddy)
Date: 4 Jan 2007 22:20:51 -0800
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <mailman.2311.1167976761.32031.python-list@python.org>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<1167974907.497878.61070@i15g2000cwa.googlegroups.com>
	<mailman.2311.1167976761.32031.python-list@python.org>
Message-ID: <1167978050.971481.111880@q40g2000cwq.googlegroups.com>


belinda thom wrote:

> On Jan 4, 2007, at 9:28 PM, Carl Banks wrote:
>
> > jeremito wrote:
> >> I am writing a class that is intended to be subclassed.  What is the
> >> proper way to indicate that a sub class must override a method?
> >
> > You can't (easily).
> >
> > If your subclass doesn't override a method, then you'll get a big fat
> > AttributeError when someone tries to call it.  But this doesn't stop
> > someone from defining a subclass that fails to override the method.
> > Only when it's called will the error show up.  You can, as others have
> > noted, define a method that raises NotImplementedError.  But this
> > still
> > doesn't stop someone from defining a subclass that fails to override
> > the method.  The error still only occurs when the method is called.
> >
> > There are some advantages to using NotImplementedError:
> >
> > 1. It documents the fact that a method needs to be overridden
> > 2. It lets tools such as pylint know that this is an abstract method
> > 3. It results in a more informative error message
> >
> > But, in the end, if someone wants to define a class that defiantly
> > refuses to declare a method, you can't stop them.
>
> This is the con of a dynamic language...
In a language that has statements to force the user to over-ride a
method when a class is sub-classed, what is to stop the lazy
sub-classer from doing the equivalent of:

  define override_me(self, ...):
    pass

And so get code through the compiler,, allowing them to 'meet their
targets'?

- Paddy.



From bdesth.quelquechose at free.quelquepart.fr  Wed Jan 24 15:13:44 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 24 Jan 2007 21:13:44 +0100
Subject: Thoughts on using isinstance
In-Reply-To: <zHg*rKEBr@news.chiark.greenend.org.uk>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>
	<mailman.3087.1169652310.32031.python-list@python.org>
	<1169656371.689791.216360@v33g2000cwv.googlegroups.com>
	<zHg*rKEBr@news.chiark.greenend.org.uk>
Message-ID: <45b7b73b$0$391$426a74cc@news.free.fr>

Matthew Woodcraft a ?crit :
> abcd <codecraig at gmail.com> wrote:
> 
>>Well my example function was simply taking a string and printing, but
>>most of my cases would be expecting a list, dictionary or some other
>>custom object.  Still propose not to validate the type of data being
>>passed in?
> 
> 
> 
> There are many people here who will indeed suggest that you're still
> best off not validating.
> 
> There are various points to consider:
> 
>  - Not adding the validation code saves a certain amount of effort.

Yes

>  - Not adding the validation code avoids one source of possible bugs.

Yes

>  - Not adding the validation code can make your code more readable, in
>    that there's that much less uninteresting code for your readers to
>    skip before they get to the meat.

Yes

>  - Adding the validation code can make your code more readable, in that
>    it can be clearer to the readers what kind of values are being
>    handled.

This is better expressed in the docstring. And if it's in the docstring, 
you can't be blamed for misuse.

>  - If you validate, you can raise an exception from the start of your
>    function with a fairly explicit message. If you don't validate,
>    you're likely to end up with an exception whose message is something
>    like 'iteration over non-sequence', and it might be raised from some
>    function nested several levels deeper in.

And what is the stack backtrace for, actually ?

>    The latter can be harder for the user of your function to debug (in
>    particular, it may not be easy to see that the problem was an invalid
>    parameter to your function rather than a bug in your function itself,
>    or corrupt data elsewhere in the system).

docstrings and unit-tests should make it clear.

>  - If you don't validate, your function will accept anything that
>    behaves sufficiently like a list/dictionary/custom-object for its
>    purposes.

Yes

>    You may consider this an advantage or a disadvantage. To some extent
>    it depends on the circumstances in which the function is used: if
>    someone passes a not-quite-a-file (say) to a function expecting a
>    file, is it more likely that this is because of a subtle bug that
>    they'll be pleased to learn about early, or that they wanted the
>    function to 'do the obvious thing' with it?

Python's POV on this is quite clear IMHO. Now if one want to have to 
declare everything three times and write layers and layers of adapters 
and wrappers, well, he knows where to find Java !-)

>  - In particular, suppose your function expects a list and someone
>    passes a string when they should have passed a list containing only
>    that string. If you don't validate, the function is likely to process
>    the string the same way as it would process a list containing a
>    number of single-character strings.

Yes. This is a very common Python gotcha. And one that is usually quite 
easy to spot and fix, even manually (let's not talk about unit-tests).

>    This might well lead to your program apparently completing
>    successfully but giving the wrong result (which is usually the kind
>    of error you most want to avoid).

Compared to what C or C++ can do to your system, this is still a pretty 
minor bug - and probably one of the most likely to be detected very 
early (did I talk about unit tests ?).


From vpat at fastwebnet.it  Tue Jan 23 06:26:22 2007
From: vpat at fastwebnet.it (Pat)
Date: 23 Jan 2007 03:26:22 -0800
Subject: I need suggests
Message-ID: <1169551582.196591.48140@v45g2000cwv.googlegroups.com>

I have to do a big programm. Could someone give me some suggests about
IDE (on Linux) and books to learn.



From Art at Arthurian.com  Mon Jan 29 13:14:18 2007
From: Art at Arthurian.com (Frank Arthur)
Date: Mon, 29 Jan 2007 13:14:18 -0500
Subject: Excellent Interview with Dennis D'Souza, full of laughs
References: <1170083292.991070.79560@v33g2000cwv.googlegroups.com>
Message-ID: <fLqvh.5639$fC2.1648@bignews4.bellsouth.net>

Real funny? Holocaust Deniers Convention in Iran?

Sick, sick Islamists!

<thermate at india.com> wrote in message 
news:1170083292.991070.79560 at v33g2000cwv.googlegroups.com...
> http://a1135.g.akamai.net/f/1135/18227/1h/cchannel.download.akamai.com/
> 18227/podcast/PORTLAND-OR/KPOJ-AM/1-23-07%20POJ-cast.mp3?




From gagsl-py at yahoo.com.ar  Fri Jan 19 14:50:26 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 16:50:26 -0300
Subject: Asyncore select statement problem
In-Reply-To: <1169228524.810461.51160@a75g2000cwd.googlegroups.com>
References: <1169075120.491855.103200@q2g2000cwa.googlegroups.com>
	<mailman.2871.1169133210.32031.python-list@python.org>
	<1169228524.810461.51160@a75g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20070119164445.03eade68@yahoo.com.ar>

At Friday 19/1/2007 14:42, JamesHoward wrote:

>Thank you for the responses.  I have learned considerably more about
>how Asyncore works because of it.
>
>The problem that I see is that Asyncore's poll function does not seem
>to be thread safe.  From what I can tell, I am calling
>dispatcher.close() properly and the dispatchers are removed from
>asyncore's global map (all except the server itself).  However, it
>seems like the error happens when the poll function gets the file
>descriptors to run select on and then the thread ticks and removes them
>from the global map.  After this the select call is made, but the file
>descriptors are not valid anymore.
>
>I guess I have two questions as a result.  First, is this a problem
>that anyone else has had and second is there a fix for it?  I have
>tried looking for Asyncore thread safe topics in Google, but without
>much luck.  If needed I think making the poll function atomic in the
>asyncore module might fix this problem, but I wanted to see what other
>people thought first.

Usually asyncore is used with only one thread - that's one of the 
reasons of using it btw. You can spawn other working threads, but 
they don't usually interact with the networking stuff directly.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From jairodsl at gmail.com  Sat Jan 13 19:48:31 2007
From: jairodsl at gmail.com (jairodsl)
Date: 13 Jan 2007 16:48:31 -0800
Subject: Comparing a matrix (list[][]) ?
In-Reply-To: <eobrm4$p68$1@cernne03.cern.ch>
References: <1168730648.038901.187460@v45g2000cwv.googlegroups.com>
	<eobrm4$p68$1@cernne03.cern.ch>
Message-ID: <1168735711.257634.306140@m58g2000cwm.googlegroups.com>

Ok, the main idea is compare each element with others elements, and go
saving the minus element positive and his position (X,Y) in the matrix,
of course min function dont let me save this position (X,Y). I dont
know if its possible do that with min function.

jDSL

Roberto Bonvallet wrote:
>
> What output are you expecting from your example matrix?  If you are expecting
> it to be 5 (the smallest positive element), using "min" is the way to do it:
>
>     >>> matrix = [[9,  8, 12, 15],
>     ...           [0, 11, 15, 18],
>     ...           [0,  0, 10, 13],
>     ...           [0,  0,  0,  5]]
>     >>> min(min(x for x in row if x > 0) for row in matrix)
>     5
> 
> -- 
> Roberto Bonvallet



From jrpfinch at gmail.com  Fri Jan 12 09:24:48 2007
From: jrpfinch at gmail.com (jrpfinch)
Date: 12 Jan 2007 06:24:48 -0800
Subject: Newbie imap lib question
Message-ID: <1168611888.009894.271190@51g2000cwl.googlegroups.com>

I have three messages in my inbox.  Why does messageCount =
gServer.select('INBOX') not just return OK and 3.  See below for
examples - seems to be completely random how many threes it returns.
The documentation for imaplib seems sparse.  Does anybody have any good
links?  Many thanks, Jon

messageCount =
 0 : OK
 1 : ['3']
messageCount =
 0 : OK
 1 : ['3', '3', '3']
messageCount =
 0 : OK
 1 : [None]
messageCount =
 0 : OK
 1 : ['3', '3']



From nospam.notospam at gmail.com  Sat Jan 20 02:16:18 2007
From: nospam.notospam at gmail.com (Drew)
Date: 19 Jan 2007 23:16:18 -0800
Subject: multiple file deletes using ftp.delete
Message-ID: <1169277378.015620.208910@51g2000cwl.googlegroups.com>

Hi all
I'm fairly new to python so please forgive my lack of comprehension of
the obvious.

I'm writing a script to ftp files to a server. This script will run
weekly. Part of the script first deletes the previous weeks files. The
problem is I'm never sure of the exact number and full name of the
files that need to be deleted. All the files start with the same string
but have different extensions (eg drew.1 drew.2 drew.tmp drew.hlp). So
I was wondering if anybody knows how to use a wild card similar to * in
UNIX to do the delete? Something like:

ftp.delete("drew.*")

Any help or suggestions would be greatly appreciated.

Drew Dowling



From consmash at gmail.com  Tue Jan 23 13:28:00 2007
From: consmash at gmail.com (consmash at gmail.com)
Date: 23 Jan 2007 10:28:00 -0800
Subject: Reading character from keyboard
In-Reply-To: <mailman.3032.1169571299.32031.python-list@python.org>
References: <mailman.3032.1169571299.32031.python-list@python.org>
Message-ID: <1169576879.920810.306490@q2g2000cwa.googlegroups.com>


Tommy Grav napisal(a):
> A very simple question. I would like to read a single character from the
> keyboard (y or n). I have tried to look in my Python books and a google
> search, but have come up empty. I am sure the info s out there, but I
> guess I am unable to find the right question or search keyword :o/
>
> Any hints or help appreciated
>     Cheers
>        Tommy

Actually, if you want to read only one character from keyboard, you
will need to use terminal operations rather than plain input stream.
Unfortunately this is rather not portable solution. For Windows you
have to import msvcrt, on Unices curses module. The latter code is
quite similar. Example:

import msvcrt

def prompt(msg='Your choice: ', options={'y': True, 'n': False}):
    while True:
        print msg
        key = msvcrt.getch()
        choice = str(key).lower()
        if options.has_key(choice):
            break
        print 'You entered wrong key! Enter again.'
    return options[choice]
    
print prompt() and 'Good for you.' or 'Bad Luck.'



From tiedon_jano at hotmail.com  Wed Jan  3 04:59:59 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Wed, 03 Jan 2007 09:59:59 GMT
Subject: import order or cross import
In-Reply-To: <mailman.2236.1167814387.32031.python-list@python.org>
References: <mailman.2236.1167814387.32031.python-list@python.org>
Message-ID: <z8Lmh.44$jr6.10@read3.inet.fi>

Roland Hedberg kirjoitti:
> Hi!
> 
> I'm having a bit of a problem with import.
> 
> I'm writing a marshalling system that based on a specification will
> create one or more files containing mostly class definitions.
> 
> If there are more than one file created (and there are reasons for
> creating more than one file in some instances) then they will import
> each other since there may be or is interdependencies in between them.
> 
> And this is where the going gets tough.
> 
> Let's assume I have the following files:
> 
> ------------- ONE.py --------------------
> 
> import TWO
> 
> class Car:
>     def __init__(self):
>         self.color = None
> 
>     def set_color(self,v):
>         if isinstance(v,TWO.Black) or isinstance(v,TWO.White):
>             self.color = v
> 
> class BaseColor:
>     def __init__(self):
> 	pass
>     def __str__(self):
>         return self.color
> 
> if __name__ == "__main__":
>     car = Car()
>     color = TWO.Black()
>     car.set_color(color)
>     print car.color
> 
> -------------- TWO.py -------------------
> 
> import ONE
> 
> class Black(ONE.BaseColor):
>     color = "Black"
>     def __init__(self):
>         ONE.BaseColor.__init__(self)
> 
> class White(ONE.BaseColor):
>     color = "White"
>     def __init__(self):
>         ONE.BaseColor.__init__(self)
> 
> -----------------------------------------
> 
> Now, running ONE.py causes no problem it will print "Black", but running
> TWO.py I get:
> AttributeError: 'module' object has no attribute 'BaseColor'
> 
> So, how can this be solved if it can be ?
> 
> To join ONE.py and TWO.py into one file could be a solution if there
> where no other conditions (non-language based) that prevented it.
> 
> -- Roland
> 

Maybe I'm missing something, but why is the class BaseColor in file 
ONE.py and not in TWO.py?

Cheers,
Jussi


From tim.one at comcast.net  Tue Jan  9 15:43:54 2007
From: tim.one at comcast.net (Tim Peters)
Date: Tue, 09 Jan 2007 14:43:54 -0600
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
	<envur1$rq1$1@gemini.csx.cam.ac.uk>
	<mailman.2480.1168350033.32031.python-list@python.org>
	<Xns98B384E126F4Ctim111one@216.196.97.136>
	<eo0mjf$i4h$1@gemini.csx.cam.ac.uk>
Message-ID: <Xns98B3A00749D6tim111one@216.196.97.136>

[Tim Peters]
...
>|> Well, just about any technical statement can be misleading if not
>|> qualified to such an extent that the only people who can still
>|> understand it knew it to begin with <0.8 wink>.  The most dubious
>|> statement here to my eyes is the intro's "exactness carries over
>|> into arithmetic".  It takes a world of additional words to explain
>|> exactly what it is about the example given (0.1 + 0.1 + 0.1 - 0.3 =
>|> 0 exactly in decimal fp, but not in binary fp) that does, and does
>|> not, generalize.  Roughly, it does generalize to one important
>|> real-life use-case:  adding and subtracting any number of decimal 
>|> quantities delivers the exact decimal result, /provided/ that
>|> precision is set high enough that no rounding occurs.

[Nick Maclaren]
> Precisely.  There is one other such statement, too: "Decimal numbers
> can be represented exactly."  What it MEANS is that numbers with a
> short representation in decimal can be represented exactly in decimal,
> which is tautologous, but many people READ it to say that numbers that
> they are interested in can be represented exactly in decimal.  Such as
> pi, sqrt(2), 1/3 and so on ....

Huh.  I don't read it that way.  If it said "numbers can be ..." I 
might, but reading that way seems to requires effort to overlook the 
"decimal" in "decimal numbers can be ...".

[attribution lost]
>|>> and how is decimal no better than binary?
 
>|> Basically, they both lose info when rounding does occur.  For
>|> example, 

> Yes, but there are two ways in which binary is superior.  Let's skip
> the superior 'smoothness', as being too arcane an issue for this
> group,

With 28 decimal digits used by default, few apps would care about this 
anyway.

> and deal with the other.  In binary, calculating the mid-point
> of two numbers (a very common operation) is guaranteed to be within
> the range defined by those numbers, or to over/under-flow.
>
> Neither (x+y)/2.0 nor (x/2.0+y/2.0) are necessarily within the range
> (x,y) in decimal, even for the most respectable values of x and y.
> This was a MAJOR "gotcha" in the days before binary became standard,
> and will clearly return with decimal.

I view this as being an instance of "lose info when rounding does 
occur".  For example,

>>> import decimal as d
>>> s = d.Decimal("." + "9" * d.getcontext().prec)
>>> s
Decimal("0.9999999999999999999999999999")
>>> (s+s)/2
Decimal("1.000000000000000000000000000")
>>> s/2 + s/2
Decimal("1.000000000000000000000000000")

"The problems" there are due to rounding error:

>>> s/2  # "the problem" in s/2+s/2 is that s/2 rounds up to exactly 1/2
Decimal("0.5000000000000000000000000000")

>>> s+s # "the problem" in (s+s)/2 is that s+s rounds up to exactly 2
Decimal("2.000000000000000000000000000")

It's always something ;-)


From nogradi at gmail.com  Thu Jan 25 18:43:58 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Fri, 26 Jan 2007 00:43:58 +0100
Subject: [ANN] markup.py 1.6
Message-ID: <5f56302b0701251543k53f757ccode696257e25bb893@mail.gmail.com>

The new 1.6 release of markup.py is available for download:

http://sourceforge.net/project/showfiles.php?group_id=161108

What is it?

Markup.py is an intuitive, lightweight, easy-to-use, customizable and
pythonic HTML/XML generator.

Where is the documentation?

http://markup.sourceforge.net/

Why is it called markup.py and not markup?

This way it's easier to search for it online and also shows that it's
a single module. Also note that the former Markup project of Edgewall
changed its name to Genshi in the meantime.

Please send comment/feedback/bugs/etc to nogradi at gmail.com


From fart at brain.org  Tue Jan 30 09:56:07 2007
From: fart at brain.org (brainfart)
Date: Tue, 30 Jan 2007 06:56:07 -0800
Subject: KEEP YOUR MOUTH SHUT Re: Did The Chinese Violate Any Treaties?
In-Reply-To: <1169260616.079301.149020@51g2000cwl.googlegroups.com>
References: <45c523e1.95039880@news.giganews.com>
	<1169260616.079301.149020@51g2000cwl.googlegroups.com>
Message-ID: <d0Jvh.36319$QU1.11952@newssvr22.news.prodigy.net>

thermate at india.com wrote...
> In this evil regime of George W Bush, you better keep your mouth
> shut about international treaties. Many more finger will point at
> you if you even point one finger at others.

I'm not sure if there is a treaty regarding such tests, and if there
is I doubt China signed it and the USA only signed it after it had
already conducted such tests and collected all the data it needs to
ensure a reliable anti-satellite weapon system.  Just like how the
USA called for a worldwide nuclear test ban after it had already
tested enough atomic bombs to gather all possible information on
nuclear explosions, so the only ones affected by such bans are the
up and coming world powers who missed the opportunity to conduct
basic scientific research in those areas before the ban took effect.

As for this particular test, it is China's way of telling us to go
fuck ourselves if we think we have any say about China's reconquest
of Taiwan.  As an American, I can tell you that there is no way we
are going to support Taiwan if it means the destruction of our
satellite infrastructure and thus our way of life.  Half of America
would drive off cliffs as their GPS navigators stopped working, and
the other half would quickly surrender to the Chinese in exchange
for restoring cellular telephone service.


From Thomas.Ploch at gmx.net  Sun Jan  7 09:02:15 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sun, 07 Jan 2007 15:02:15 +0100
Subject: I want to learn
In-Reply-To: <1168174097.252001.71130@s80g2000cwa.googlegroups.com>
References: <1168174097.252001.71130@s80g2000cwa.googlegroups.com>
Message-ID: <45A0FD67.4070104@gmx.net>

joeyslistings at yahoo.com schrieb:
> Hi,
> 
> I have been "programming" in the .net environment and ide for a few
> years and I am looking to make the switch over to python. I have
> absolutely no python experience whatsoever. I am looking for a python
> guru who has instant messenger or gtalk or whatever who can meet me
> online in the mornings, give me some direction for the day and then
> answer some questions here and there online throughout the day. 


So you are looking for a person (no, a guru), that stays by your side
the whole day, gives you answers and helps you learning python.

This is a ridiculous request.

If you want to learn python, you should start with visiting
http://www.diveintopython.org/ and read it. If you have previous
programming experience, this is the place to start.

> Sorry to interrupt the group but since all python gurus appear to be
> happily at work on the next level apps at google nobody responded to
> my craigslist ads.

You can always ask your questions here on the list, there are enough
people that are willing to help.

Thomas


From ironfroggy at gmail.com  Wed Jan 17 21:19:52 2007
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Wed, 17 Jan 2007 21:19:52 -0500
Subject: [Python-Dev] Deletion order when leaving a scope?
In-Reply-To: <45AEC612.1030001@hastings.org>
References: <45AEC612.1030001@hastings.org>
Message-ID: <76fd5acf0701171819l542db814h593913d4010d62a2@mail.gmail.com>

Absolutely an irrelevent side effect, especially when you take into
consideration the 4 and counting alternative implementations of the
language.

None the less, I can explain why it is as it is, keeping in mind its
not like that on purpose, its just how it is. Locals are optimized
into an array for fast lookup. Every name assigned to in a function is
known as a local in that function and this internal array holds its
reference. It is simply a product of the array indexes and deletion
order being the same, 0 to N.

On 1/17/07, Larry Hastings <larry at hastings.org> wrote:
>
>
>
>  I just ran a quickie experiment and determined: when leaving a scope,
> variables are deleted FIFO, aka in the same order they were created.  This
> surprised me; I'd expected them to be deleted LIFO, aka last first.  Why is
> it thus?  Is this behavior an important feature or an irrelevant
> side-effect?
>
>  Cheers,
>
>
>  larry
>
> _______________________________________________
> Python-Dev mailing list
> Python-Dev at python.org
> http://mail.python.org/mailman/listinfo/python-dev
> Unsubscribe:
> http://mail.python.org/mailman/options/python-dev/ironfroggy%40gmail.com
>
>
>


-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From ziga.seilnacht at gmail.com  Tue Jan  2 20:00:26 2007
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 2 Jan 2007 17:00:26 -0800
Subject: Python embedded interpreter: how to initialize the interpreter ?
References: <1167573333.723607.199480@v33g2000cwv.googlegroups.com>
Message-ID: <1167786026.593197.101780@42g2000cwt.googlegroups.com>

ycollet at freesurf.fr wrote:
> Hello,
>
> I've written a C embedded application. I want to open a python gui
> application in my C program but when I do :
>
> PyRun_String( "import gui.py", file_input, pDictionary, pDictionary );
>
> the interpreter emits an error: tkinter module not defined
>
> What script must I load to initialize the embedded python interpreter
> so as I have the same modules in the python command line and in the
> python embedded interpreter ? /usr/lib/python2.4/*.py ??
>
> Yann COLLETTE

Did you call the Py_Initialize() function before trying to execute that
statement? Note also that you might have to Py_SetProgramName(somepath)
before calling Py_Initialize(). See the documentation for details:
http://docs.python.org/ext/embedding.html
http://docs.python.org/api/embedding.html

Hope this helps,
Ziga



From felipe.lessa at gmail.com  Wed Jan  3 19:36:20 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Wed, 3 Jan 2007 22:36:20 -0200
Subject: static object
In-Reply-To: <459c306c$0$314$426a74cc@news.free.fr>
References: <459c306c$0$314$426a74cc@news.free.fr>
Message-ID: <c2701f5c0701031636i7fd8e987t703de1f14f2a4c0e@mail.gmail.com>

On 1/3/07, meelab <meelab at free.fr> wrote:
> I am looking for a way to create a "static object" or a "static class" -
> terms might be inappropriate - having for instance:

An example will speak better than me:

class Card(object):
    __cards = {}

    def __init__(self, number, suit):
        self.number, self.suit = number, suit

    def __new__(cls, number, suit):
        try:
            return cls.__cards[(number, suit)]
        except KeyError:
            obj = object.__new__(cls, number, suit)
            cls.__cartas[(number, suit)] = obj
            return obj


-- 
Felipe.


From libintr at gmail.com  Fri Jan 12 11:48:16 2007
From: libintr at gmail.com (lee)
Date: 12 Jan 2007 08:48:16 -0800
Subject: modules...n methods
Message-ID: <1168620496.520506.296330@q2g2000cwa.googlegroups.com>

First of all thnx guys for ur cover on ma questions....Ok some more
then...whats the way to read the sourcecode of methods and built in
functions?



From paul at boddie.org.uk  Fri Jan 12 09:08:38 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 12 Jan 2007 06:08:38 -0800
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
	<1168597288.571937.176430@s34g2000cwa.googlegroups.com>
	<mailman.2642.1168609719.32031.python-list@python.org>
Message-ID: <1168610918.587465.197740@51g2000cwl.googlegroups.com>

Konrad Hinsen wrote:
>
> That's one more project... It seems that there is significant
> interest in parallel computing in Python. Perhaps we should start a
> special interest group? Not so much in order to work on a single
> project; I believe that at the current state of parallel computing we
> still need many different approaches to be tried. But an exchange of
> experience could well be useful for all of us.

I think a special interest group might be productive, but I've seen
varying levels of special interest in the different mailing lists
associated with such groups: the Web-SIG list started with enthusiasm,
produced a cascade of messages around WSGI, then dried up; the XML-SIG
list seems to be a sorry indication of how Python's XML scene has
drifted onto other matters; other such groups have also lost their
momentum.

It seems to me that a more useful first step would be to create an
overview of the different modules and put it on the python.org Wiki:

http://wiki.python.org/moin/FrontPage
http://wiki.python.org/moin/UsefulModules (a reasonable entry point)

If no-one beats me to it, I may write something up over the weekend.

Paul



From phil at riverbankcomputing.co.uk  Tue Jan 23 07:04:26 2007
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Tue, 23 Jan 2007 12:04:26 +0000
Subject: PyQt4 strangeness
In-Reply-To: <mLSdnfIBYsFkfijYRVnzvQ@telenor.com>
References: <mLSdnfIBYsFkfijYRVnzvQ@telenor.com>
Message-ID: <200701231204.26654.phil@riverbankcomputing.co.uk>

On Tuesday 23 January 2007 10:31 am, Tina I wrote:
> I'm trying to 'convert' my self from Qt3 to Qt4 (it rocks!) and one
> thing seem strange:
> With Qt3 I usually did "from qt import *", but this does not seem to
> work with Qt4. I have to use "from PyQt4 import QtGui , QtCore" and also
> have to use "QtCore.something".
>
> Like when connecting a button:
>
> 	self.connect(self.ui.testButton, QtCore.SIGNAL("clicked()"),
> self.doSomething)
>
> Anyone know why this is? Or am I missing something very basic here? (I'm
> still very much a noob I guess)
>
> I'm using the Debian packages by the way.

The module structure of PyQt reflects the library structure of Qt. Qt4 has 
different libraries to Qt3 so PyQt4 has different modules to PyQt3.

The top level PyQt4 module ensures that PyQt3, PyQt4 (and eventually PyQt5) 
can all be installed side by side in the same site-packages directory.

The style of import statement you use is up to you. All of the PyQt4 examples 
adopt the style you describe, but you can achieve the equivalent of your 
current practice by doing the following instead...

    from PyQt4.Qt import *

Phil


From gherron at islandtraining.com  Tue Jan 23 03:05:33 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 23 Jan 2007 00:05:33 -0800
Subject: How to use dynamic properties? <-- Noob
In-Reply-To: <BCF1D59F-ECFE-4F43-AC2A-797A6E344638@datafly.net>
References: <BCF1D59F-ECFE-4F43-AC2A-797A6E344638@datafly.net>
Message-ID: <45B5C1CD.6010009@islandtraining.com>

Sean Schertell wrote:
> person.name = 'Joe'
> person.age = 20
> person.sex = 'm'
>
> info_I_need = name
>
> print person.info_I_need
>
> # How can I make it print 'Joe' ?
>
>
> Sean
>
>
> ::::  DataFly.Net  ::::
> Complete Web Services
> http://www.datafly.net
>
>   
Like this:

    info_I_need = 'name'

    print getattr(person, info_I_need)

Related to getattr are setattr and hasattr. 

Gary Herron






From robert.kern at gmail.com  Thu Jan  4 13:54:10 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 04 Jan 2007 12:54:10 -0600
Subject: Set type?
In-Reply-To: <1167936480.882357.277320@v33g2000cwv.googlegroups.com>
References: <1167936480.882357.277320@v33g2000cwv.googlegroups.com>
Message-ID: <enjigm$oi5$1@sea.gmane.org>

_ wrote:
> How do you check to see if a variable is a set?  I would like to use
> 
> if type(var) is types.SetType:
>    blah
> 
> but that is not available in types module.  I am using 2.4

In [1627]: type(set()) is set
Out[1627]: True

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From nagle at animats.com  Fri Jan 12 18:02:10 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 12 Jan 2007 23:02:10 GMT
Subject: More M2Crypto issues. Not big ones, though.
Message-ID: <SrUph.33250$Gr2.12865@newssvr21.news.prodigy.net>

   A list of small problems and bugs in the current M2Crypto:
I need to look at SSL certificates in some detail, so this
is all about the access functions for certificates.

Bugs:

	1.  Off by one error at "X509.get_ext_count()". Reports
	eight extensions on a certificate that only has seven.
	get_ext_at works for extensions 0..6, then returns
	an undefined for the nonexistent #7.
	Test against "https://www.verisign.com".
	Entered into Bugzilla as #7717.

	3. /M2Crypto/SSL/Connection.py:147:
	DeprecationWarning: Old style callback, use cb_func(ok, store)
	instead return m2.ssl_connect(self.ssl)
	(Also reported, in Polish, here: 
http://www.mail-archive.com/pld-devel-pl at lists.pld-linux.org/msg12433.html)
	Entered into Bugzilla as #7718.

	4. "close()" on an SSL socket that's just finished certificate
	negotiation hangs, at least on Windows.  "del" does not hang,
	but I don't know if there's a leak problem.
	Not enough info yet to file a bug report.  I might be doing
	something wrong there.  Any known "close" issues?

Other issues:

	1. X509.X509_name.__getattr__:
	Field retrieval from X.509 name items with x509_name_by_nid
	retrieves only first instance of field, not all instances.
	Really should return a list.  The same key is used more
	than once very frequently; these keys aren't unique.
	It's tempting to treat these things like a hash, but they
	don't really work that way.  As for simply iterating through
	the name elements, there's no direct way to just get the
	elements one at a time.   X509_Name has an "entry_count"
	method, but no way to get the Nth entry.

	As a workaround, I'm converting the X508_name to a string with
	   subjectstr = peer.get_subject().as_text(
		flags=(m2.XN_FLAG_RFC2253 | m2.ASN1_STRFLGS_UTF8_CONVERT)
		& ~m2.XN_FLAG_DUMP_UNKNOWN_FIELDS)	# in RFC2253 format
	This is safely parseable.  While the default format doesn't have
	escapes around the delimiter characters, with these flags,
	entries are comma-separated with backslash escapes where
	necessary.  This works, unlike the "server()" function in
	Python's built-in SSL, which returns a debug format that
	has the same characters as delimiters and text.

	2. Unclear if M2Crypto's X.509 interface is UTF-8 compatible.
	OpenSSL will return info in UTF-8 if you use the
	ASN1_STRFLGS_UTF8_CONVERT flag on as_text, but unclear if the
	M2 glue code handles this correctly.  Haven't found a UTF8 cert
	to test it on yet.

Other than that, I'm having relatively good results with M2Crypto.

					John Nagle


From sean at datafly.net  Fri Jan 26 19:01:25 2007
From: sean at datafly.net (Sean Schertell)
Date: Sat, 27 Jan 2007 09:01:25 +0900
Subject: Off-Topic Posts
In-Reply-To: <1169852537.508485.13260@v33g2000cwv.googlegroups.com>
References: <1169821615.198847.237790@m58g2000cwm.googlegroups.com>
	<Xns98C4A515B6904someconundrum@216.196.97.131>
	<1169852010.083168.81900@h3g2000cwc.googlegroups.com>
	<1169852537.508485.13260@v33g2000cwv.googlegroups.com>
Message-ID: <8FF0B818-AD0B-4743-8D95-A84A7955F532@datafly.net>

Hey Genius -- I'm probably further to the left and even more  
vehemently opposed to the Bush/Cheney regime than you are. But could  
you *please* take your unwelcome ranting elsewhere? You're not  
winning any converts here. And you're alienating your ideological  
allies to boot. Give it a rest, m'kay?

Sean

P.S. Printing letters in all-caps and using extra exclamation points  
doesn't necessarily make your argument any more compelling.




On Jan 27, 2007, at 8:02 AM, thermate at india.com wrote:

> What did Dick Faced Cheney told Honorable Senator Patrick Leahy ?  
> "Fuck
> yourself".
> So much for politeness and vulgarity at the top level.
>
> Proof:
> http://www.capitolhillblue.com/news2/2007/01/the_madness_of.html
>
> On Jan 26, 2:53 pm, therm... at india.com wrote:
>> Yeah, listen to wise counsel of klein. As a member of conquered races
>> and still under occupation, namely Jewish, French, German, Japanese,
>> Korean ... dont mess in the crimes of the anglo-saxon yanks. You  
>> should
>> remember the beating you got from the Anglo-Saxon Yanks and just keep
>> quiet ... As for the lunatics off their meds, its also true that 911
>> was a grand optical illusion and thus within the charter of this  
>> group
>> to study ... After all, one of its proponent is the former head of  
>> Star
>> Wars, Dr Bob Bowman from MIT and Caltech ... Do you have a degree  
>> from
>> those prestigious institutes or did you manage to get any of your  
>> kids
>> into one of them ??? As for vulgarity, its the mark of patriotism ...
>> the constitutional amendments guarantee it and Herbert Walker Bush  
>> was
>> a strongly suspected pedophile ... there is a video called conspiracy
>> of silence, watch it on video.google.com and download with before the
>> fascist bureau of incompetence bastards (running around like crazy  
>> rats
>> to confiscate pentagon videos on that day in destruction of evidence)
>> try to sabotage the google servers ... they are part of the crime and
>> complicit in it. If they were competent, we would see one consistent
>> theory coming out from that bureau to explain all significant  
>> events on
>> that day. Now dont forget the SHITTY job done by FEMA and NIST. There
>> are gaping holes in their work.
>>
>> Hey Kinch, if you are jewish, did you forget that England was the  
>> first
>> country to expel the Jews.
>>
>> If you forget your status as conquered races, then you are in  
>> delusion,
>> not anyone else.
>>
>> The final balance of power provided against the anglos will be by
>> Slavs. Hurray to Vladimir Putin, and Mikhail Khodorkovsky in a  
>> Siberian
>> jail.
>>
>> On Jan 26, 1:13 pm, Richard J Kinch <k... at truetex.com> wrote:
>>
>>> alex writes:
>>>> I have only just joined this group, but have noticed a  
>>>> significant rise
>>>> in off-topic posts that really detract from what is otherwise an
>>>> excellent place to learn and talk about optics.This has nothing  
>>>> to do with sci.optics.  Recent days have seen this stuff
>>> being broadcast mechanically into all sorts of groups.
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list

::::  DataFly.Net  ::::
Complete Web Services
http://www.datafly.net



From deets at nospam.web.de  Sun Jan 28 09:08:12 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 28 Jan 2007 15:08:12 +0100
Subject: Locking access to all data members
In-Reply-To: <1169976708.934441.213770@h3g2000cwc.googlegroups.com>
References: <1169976708.934441.213770@h3g2000cwc.googlegroups.com>
Message-ID: <523p32F1mbcmcU1@mid.uni-berlin.de>

gooli schrieb:
> I have a class with a lot of attributes whose objects are accessed 
> from multiple threads. I would like to synchronize the access to all 
> the attributes, i.e. acquire a lock, return the value, release the 
> lock (in a finally clause).
> 
> Is there a way to do that without turning each attribute into a 
> property and manually wrapping each property with the locking code?
> 
> How about classes bound with SQLAlchemy? Is it possible to do that for 
> those too?
> 
> Example of a class I would like to wrap:
> 
> class Job(object):
>     def __init__(self, itemType):
>         self.id = self.idSequence
>         self.itemType = itemType
>         self.status = "waiting"
>         self.createDate = None
>         self.hostName = None
>         self.progress = 0
>         self.items = []
> 

You can use a metaclass or decorators to put the locking code in place 
for all methods. I'm not sure though if that interferes with SQLAlchemy.


Diez


From zion at ee.oulu.fi  Fri Jan 26 01:39:30 2007
From: zion at ee.oulu.fi (Simo Hosio)
Date: Fri, 26 Jan 2007 08:39:30 +0200 (EET)
Subject: problems with pyzeroconf and linux
Message-ID: <Pine.GSO.4.61.0701260819290.24605@tk1>


Hi all,
I am trying to get pyzeroconf (http://sourceforge.net/projects/pyzeroconf) 
running on my machine but having trouble... Running the Zeroconf.py file 
seems to register the service, but is unable to find it.

(same situation than in 
http://www.nabble.com/pyzeroconf-on-linux...-t481215.html, but differenet 
cause, I'm sure..)

"""
Multicast DNS Service Discovery for Python, version 0.12
1. Testing registration of a service...
    Registering service...
    Registration done.
2. Testing query of service information...
    Getting ZOE service: None
    Query done.
3. Testing query of own service...
    Getting self: None
    Query done.
4. Testing unregister of service information...
    Unregister done.
"""

Running ethereal reveals that there are no responses to the 2) and 
3)...The queries are certainly there. I'm runnin this with Ubuntu Dapper in 
a WLAN network. I am not too familiar with networking in Linux environment, 
so if anyone has any help on how to get it running, I would appreciate. :)


Best Regards,
Simo Hosio


From cjw at sympatico.ca  Tue Jan 30 16:51:49 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 30 Jan 2007 16:51:49 -0500
Subject: Conditional expressions - PEP 308
Message-ID: <epoelp$je$1@sea.gmane.org>

It would be helpful if the rules of the game were spelled out more clearly.

The conditional expression is defined as X if C else Y.
We don't know the precedence of the "if" operator.  From the little test 
below, it seem to have a lower precedence than "or".

Thus, it is desirable for the user to put the conditional expression in 
parentheses.

Colin W.

# condExpr.py
# PEP 308 defines a conditional expression as X if C else Y
# but we don't know exactly what X is supposed to be.
# It doesn't seem to be spelled out in the syntax.

def main():
   names= ['abc', 'def', '_ghi', 'jkl', '_mno', 'pqrs']
   res= ''
   for w in names:
    	res= res + w if w[0] != '_' else ''
    	z= 1
   print 'res1:', res

   res= ''
   for w in names:
    	res= res + (w if w[0] != '_' else '')
    	z= 1
   print 'res2:', res

if __name__ == '__main__':
   main()

Result:
[Dbg]>>>
res1: pqrs
res2: abcdefjklpqrs



From thinker at branda.to  Mon Jan 15 22:45:40 2007
From: thinker at branda.to (Thinker)
Date: Tue, 16 Jan 2007 11:45:40 +0800
Subject: Watch log
In-Reply-To: <1168897765.370442.201660@51g2000cwl.googlegroups.com>
References: <1168892415.324184.273210@l53g2000cwa.googlegroups.com>	<512astF1i9fgbU1@mid.individual.net>
	<1168897765.370442.201660@51g2000cwl.googlegroups.com>
Message-ID: <45AC4A64.90007@branda.to>

Salvatore Di Fazio wrote:
> Bjoern Schliessmann ha scritto:
>
>   
>> Why not read the file continuously and only do something if a new
>> line is complete (i. e.  a newline char is detected)?
>>     
>
> How can I read the file continuously?
>
>   
What you want is something like 'tail -f' in linux.
If you look into it's source code, you will find it check file periodically.
When a read() reach the end of the file, read() will return a empty string.
You can try to read data from the file periodically after a EOF.
I think it is what you want.

-- 
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py



From mikael at isy.liu.se  Wed Jan 10 10:17:48 2007
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Wed, 10 Jan 2007 16:17:48 +0100
Subject: Yield
In-Reply-To: <45A502DE.9000901@isy.liu.se>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>	<455b4f9f$1@usenet01.boi.hp.com>	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>	<455c15ca$1@news.eftel.com>	<mailman.227.1163664079.32031.python-list@python.org>	<455c1ddf@news.eftel.com>	<1163691173.737911.130410@i42g2000cwa.googlegroups.com>	<mailman.317.1163751303.32031.python-list@python.org>
	<45a3e096$0$8024$3b214f66@tunews.univie.ac.at>
	<45A502DE.9000901@isy.liu.se>
Message-ID: <45A5039C.3070508@isy.liu.se>



I wrote:
> The definition given there is "In mathematics </wiki/Mathematics>, a 
> *prime number* (or a *prime*) is a natural number 
> </wiki/Natural_number> that has exactly two (distinct) natural number 
> divisors </wiki/Divisor>." The important part of the statement is 
> "exactly two...divisors", which rules out the number 1.

Or should I say: Thunderbird made me write:... Those freakin 
</wiki/Mathematics> and </wiki/Natural_number> was not visible before I 
posted the thing. &%#&%#

/MiO


From stephan.diehl at gmx.net  Mon Jan 29 12:25:28 2007
From: stephan.diehl at gmx.net (Stephan Diehl)
Date: Mon, 29 Jan 2007 18:25:28 +0100
Subject: next berlin python-group meeting fr., 2.2.
Message-ID: <eplam5$sgv$01$1@news.t-online.com>

after a long (veeerrrryy) long time, I'm pleased to announce our next 
python meeting in berlin.
time: friday 2.2. 7pm
place:Cafe & Restaurant UNENDLICH
Boetzowstrasse 14
10407 Berlin (Prenzlauer Berg "Boetzowviertel")

This is a fun meeting without offical talks.
If you haven't done so already, subscribe to
http://starship.python.net/cgi-bin/mailman/listinfo/python-berlin
for last minute information. If you plan to come, please leave a short 
notice there, so we know how many people to expect.

Cheers

Stephan


From lamthierry at gmail.com  Fri Jan 12 16:38:45 2007
From: lamthierry at gmail.com (Thierry Lam)
Date: 12 Jan 2007 13:38:45 -0800
Subject: WMI Python, writing remotely and retrieving env variables values
Message-ID: <1168637924.982266.214250@s34g2000cwa.googlegroups.com>

I'm using the WMI library for python and I was able to connect to
another computer on the network with the following line:

c = wmi.WMI(computer="the-network-computer", user="hello",
password="hello")

Is there a way to write information to a file on that computer?

How do I read environment variables, for example SystemDrive?

Thierry



From m.sloyko at gmail.com  Sun Jan  7 18:30:38 2007
From: m.sloyko at gmail.com (Maxim Sloyko)
Date: 7 Jan 2007 15:30:38 -0800
Subject: lxml namespaces problem
Message-ID: <1168212638.493983.202560@11g2000cwr.googlegroups.com>

Hi All!

I have a little problem with XML namespaces.
In my application I have two XML processors, that process the same
document, one after the other.  The first one looks for nodes in 'ns1'
namespace, and substitutes them, according to some algorithm. After
this processor is finished, it is guaranteed that there are no more
'ns1' nodes left in the tree. however 'ns1' namespace dclaration is
still
there, in the root node (well, I put it there manually). Now, when
this namespace is no longer needed, I want to get rid of it, because
it confuses some other processors (namely, my browser)

So, the question is, how do I do that?
del tree.getroot().nsmap['ns1']
does not seem to do the trick :(

Thanks in advance and Happy Holidays!



From istvan.albert at gmail.com  Thu Jan 11 09:54:12 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: 11 Jan 2007 06:54:12 -0800
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
Message-ID: <1168527252.384422.159880@p59g2000hsd.googlegroups.com>


oyekomova wrote:

> csvread in Matlab for a very large csv file. Matlab read the file in
> 577 seconds. On the other hand, this code below kept running for over 2
> hours. Can this program be made more efficient? FYI

There must be something wrong with your setup/program. I work with
large csv files as well and  I never have performance problems of that
magnitude. Make sure you are not doing something else while parsing
your data.

Parsing 1 million lines with six columns with the program below takes
87 seconds on my laptop. Even your original version with extra slices
and all would still only be take about 50% more time.

import time, csv, random
from numpy import array

def make_data(rows=1E6, cols=6):
    fp = open('data.txt', 'wt')
    counter = range(cols)
    for row in xrange( int(rows) ):
        vals = map(str, [ random.random() for x in counter ] )
        fp.write( '%s\n' % ','.join( vals ) )
    fp.close()

def read_test():
    start  = time.clock()
    reader = csv.reader( file('data.txt') )
    data   = [ map(float, row) for row in reader ]
    data   = array(data, dtype = float)
    print 'Data size', len(data)
    print 'Elapsed', time.clock() - start

#make_data()
read_test()



From etatoby at gmail.com  Sat Jan 27 11:42:16 2007
From: etatoby at gmail.com (Toby)
Date: 27 Jan 2007 16:42:16 GMT
Subject: how to remove c++ comments from a cpp file?
References: <1169801197.941449.303000@v33g2000cwv.googlegroups.com>
	<mailman.3190.1169802638.32031.python-list@python.org>
	<1169805244.879280.235660@v45g2000cwv.googlegroups.com>
Message-ID: <45bb80e4$0$20806$5fc30a8@news.tiscali.it>

Frank Potter wrote:
> r=re.compile(ur"//[^\r\n]+$", re.UNICODE|re.VERBOSE)
> f_new=r.sub(ur"",f)

>From the documentation:

re.MULTILINE
	When specified [...] the pattern character "$" matches at the
	end of the string and at the end of each line (immediately
	preceding each newline). By default [...] "$" matches only at
	the end of the string.

re.DOTALL
	[...] without this flag, "." will match anything except a newline.

So a simple solution to your problem would be:

r = re.compile("//.*")
f_new = r.sub("", f)


Toby


From vmalloc at gmail.com  Fri Jan 26 04:04:58 2007
From: vmalloc at gmail.com (Rotem)
Date: 26 Jan 2007 01:04:58 -0800
Subject: Possible bug in Python 2.5? (Was Re: pdb in python2.5)
In-Reply-To: <wihlkjqsl6o.fsf@panix3.panix.com>
References: <1169717486.230356.79730@l53g2000cwa.googlegroups.com>
	<wihtzyfs17s.fsf@panix3.panix.com>
	<wihps92sysg.fsf_-_@panix3.panix.com>
	<1169760673.197226.206540@a75g2000cwd.googlegroups.com>
	<wihlkjqsl6o.fsf@panix3.panix.com>
Message-ID: <1169802298.407455.325830@l53g2000cwa.googlegroups.com>

>   * comp.lang.python is not the place to file bug reports
Agreed
>   * more detail is needed that what's been given so far
Agreed. I will investigate further when I get a chance and determine if
it's a problem on my end.

Thanks a lot!



From GatlingGun at gmail.com  Tue Jan 30 14:52:24 2007
From: GatlingGun at gmail.com (TOXiC)
Date: 30 Jan 2007 11:52:24 -0800
Subject: Find and replace in a file with regular expression
Message-ID: <1170186744.322855.253550@j27g2000cwj.googlegroups.com>

Hi everyone,
First I say that I serched and tryed everything but I cannot figure 
out how I can do it.
I want to open a a file (not necessary a txt) and find and replace a 
string.
I can do it with:

import fileinput, string, sys
fileQuery = "Text.txt"
sourceText = '''SOURCE'''
replaceText = '''REPLACE'''
def replace(fileName, sourceText, replaceText):

    file = open(fileName, "r")
    text = file.read() #Reads the file and assigns the value to a 
variable
    file.close() #Closes the file (read session)
    file = open(fileName, "w")
    file.write(text.replace(sourceText, replaceText))
    file.close() #Closes the file (write session)
    print "All went well, the modifications are done"

replacemachine(fileQuery, sourceText, replaceText)

Now all went ok but I'm wondering if it's possible to replace text if /
sourceText/ match a regex.
Help me please!
Thx in advance



From tiedon_jano at hotmail.com  Sun Jan  7 07:01:30 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Sun, 07 Jan 2007 12:01:30 GMT
Subject: still struggling, howto use a list-element as a name ? Sory,
	hit send button to early
In-Reply-To: <bcf0b$45a0291e$d443bb3a$4323@news.speedlinq.nl>
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
	<45a01981$0$296$426a74cc@news.free.fr>
	<I_Unh.390$_B1.309@read3.inet.fi>
	<441e$45a02246$d443bb3a$24795@news.speedlinq.nl>
	<bcf0b$45a0291e$d443bb3a$4323@news.speedlinq.nl>
Message-ID: <ui5oh.87$_k2.20@read3.inet.fi>

Stef Mientki kirjoitti:
> In this exercise, I don't attempt to write "beautiful" Python code,
> but the first thing is to write a simple "user-interface" for non-Pythians.
> I understand that standardization about naming conventions is important,
> but the purpose here is to serve the user, who has to write and 
> unerstand this,
> therefore IORLW is in the domain always written in capitals,
> spaces here makes it lot easier to compare the different actions,
> in this domain we're used to 2 spaces etc.
> 
> <snip>
 > thanks again for all your wonderfull help,
> cheers,
> Stef Mientki

I can now understand the reason for the strange-looking function names 
etc. and think it's reasonable. The application domain is totally alien 
to me, though, so further explanations won't help me because a lack of 
the necessary electronic knowledge.

Furthermore, as became evident from your web pages, your application is 
quite extensive which makes your task more difficult in formulating 
questions because things connected to other things are hard to extract 
for review.

Anyway, happy hacking with Python.

Cheers,
Jussi


From Roka100 at gmail.com  Wed Jan 24 06:59:17 2007
From: Roka100 at gmail.com (Jia Lu)
Date: 24 Jan 2007 03:59:17 -0800
Subject: Q: Why Python is bad for web from the point of URLs?
In-Reply-To: <1169635844.254229.310460@a75g2000cwd.googlegroups.com>
References: <1169635844.254229.310460@a75g2000cwd.googlegroups.com>
Message-ID: <1169639956.972289.317210@j27g2000cwj.googlegroups.com>


But you can do capsulation to them.


On 1?24?, ??7:50, "techtonik" <techto... at gmail.com> wrote:
> A: Because you need three modules to parse, edit and reassemble query
> string. urlparse, cgi and urllib



From vpolukcht at gmail.com  Thu Jan 18 05:58:32 2007
From: vpolukcht at gmail.com (Victor Polukcht)
Date: 18 Jan 2007 02:58:32 -0800
Subject: One more regular expressions question
In-Reply-To: <eonhct$77p$1@cernne03.cern.ch>
References: <1169113767.320500.71200@11g2000cwr.googlegroups.com>
	<eonhct$77p$1@cernne03.cern.ch>
Message-ID: <1169117912.193536.321260@a75g2000cwd.googlegroups.com>

My pattern now is:

(?P<var1>[^(]+)(?P<var2>\d+)\)\s+(?P<var3>\d+)

And i expect to get:

var1 = "Unassigned Number "
var2 = "1"
var3 = "32"

I'm sure my regexp is incorrect, but can't understand where exactly.

Regex.debug shows that even the first block is incorrect.

Thanks in advance.

On Jan 18, 1:15 pm, Roberto Bonvallet <Roberto.Bonval... at cern.ch>
wrote:
> Victor Polukcht wrote:
> > My actual problem is i can't get how to include space, comma, slash.Post here what you have written already, so we can tell you what the
> problem is.
> 
> --
> Roberto Bonvallet



From pavlovevidence at gmail.com  Sun Jan 14 15:04:57 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 14 Jan 2007 12:04:57 -0800
Subject: Is it possible to get whole commandline include redirection.., etc
In-Reply-To: <1168643505.949920.154470@a75g2000cwd.googlegroups.com>
References: <1168643505.949920.154470@a75g2000cwd.googlegroups.com>
Message-ID: <1168805096.858830.94180@v45g2000cwv.googlegroups.com>

postindex at gmail.com wrote:
> Can I get whole commandline not only argument list.
>
> 1. When I command like this
>     $ a.py > filename
> 2. sys.argv is returns only argument list
>     ['a.py']
>
> Is there a way to find out 'redirection' information.

It's not possible to find the exact command line redirections.

However, you can tell whether a standard I/O stream has been redirected
or not (kind of) using isattr attribute.  For instance,
sys.stdin.isatty() returns 1 when it's not being redirected.  It's not
exact, though.  It's possible to redirect to a device that is a tty,
and sometimes standard I/O streams will not be ttys even without
redirection, such as when run by a script with redirection.  (It
shouldn't be a problem, since the main use case is to check whether the
program should run in interactive mode or not.)


Carl Banks



From george.sakkis at gmail.com  Thu Jan 18 19:40:58 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 18 Jan 2007 16:40:58 -0800
Subject: Iterator length
References: <1169162762.997894.180320@q2g2000cwa.googlegroups.com>
Message-ID: <1169167258.553202.190130@m58g2000cwm.googlegroups.com>

bearophileHUGS at lycos.com wrote:

> Often I need to tell the len of an iterator, this is a stupid example:
>
> >>> l = (i for i in xrange(100) if i&1)
>
> len isn't able to tell it:
>
> >>> len(l)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: object of type 'generator' has no len()
>
> This is a bad solution, it may need too much memory, etc:
>
> >>> len(list(l))
>
> This is a simple solution in a modern Python:
>
> >>> sum(1 for _ in l)
> 50
>
> This is a faster solution (and Psyco helps even more):
>
> def leniter(iterator):
>     """leniter(iterator): return the length of an iterator,
>     consuming it."""
>     if hasattr(iterator, "__len__"):
>         return len(iterator)
>     nelements = 0
>     for _ in iterator:
>         nelements += 1
>     return nelements
>
> Is it a good idea to extend the functionalities of the built-in len
> function to cover such situation too?
>
> Bye,
> bearophile

Is this a rhetorical question ? If not, try this:

>>> x = (i for i in xrange(100) if i&1)
>>> if leniter(x): print x.next()

George



From brochu121 at gmail.com  Wed Jan 10 10:43:47 2007
From: brochu121 at gmail.com (david brochu jr)
Date: Wed, 10 Jan 2007 10:43:47 -0500
Subject: Using Excel With Python
Message-ID: <9583ed900701100743h2310ccc0jc82f64a64aa00df9@mail.gmail.com>

Try using ExcelApp.Close(). This should kill the entire application (it
might prompt for a Save).
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070110/a2cb31a5/attachment.html>

From nmm1 at cus.cam.ac.uk  Thu Jan 11 05:44:12 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 11 Jan 2007 10:44:12 GMT
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<1168452879.866265.36880@i39g2000hsf.googlegroups.com>
	<eo528r$jq3$1@news.albasani.net>
Message-ID: <eo54ds$25e$1@gemini.csx.cam.ac.uk>


In article <eo528r$jq3$1 at news.albasani.net>,
robert <no-spam at no-spam-no-spam.invalid> writes:
|> 
|> Most threads on this planet are not used for number crunching jobs,
|> but for "organization of execution".

That is true, and it is effectively what POSIX and Microsoft threads
are suitable for.  With reservations, even there.

|> Things like MPI, IPC are just for the area of "small message, big job"
|> - typically sci number crunching, where you collect the results "at
|> the end of day". Its more a slow network technique.

That is completely false.  Most dedicated HPC systems use MPI for high
levels of message passing over high-speed networks.

|> > They use it for the communication, but don't expose it to the
|> > programmer.  It is therefore easy to put the processes on different
|> > CPUs, and get the memory consistency right.
|> 
|> Thus communicated data is "serialized" - not directly used as with
|> threads or with custom shared memory techniques like POSH object
|> sharing.

It is not used as directly with threads as you might think.  Even
POSIX and Microsoft threads require synchronisation primitives, and
threading models like OpenMP and BSP have explicit control.

Also, MPI has asynchronous (non-blocking) communication.


Regards,
Nick Maclaren.


From bruno.desthuilliers at websiteburo.com  Wed Jan 10 04:42:09 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Wed, 10 Jan 2007 10:42:09 +0100
Subject: Establishing if an Object is Defined
In-Reply-To: <1168420616.285450.306460@k58g2000hse.googlegroups.com>
References: <1168420616.285450.306460@k58g2000hse.googlegroups.com>
Message-ID: <45a4b4e6$0$298$426a34cc@news.free.fr>

bg_ie at yahoo.com a ?crit :
> Hi,
> 
> The following code works -
> 
> one = 1
> if one == 1:
>   ok = 1
> print ok
> 
> but this does not, without exception -
> 
> one = 2

Are you competing for the Most Misleading Name Award(tm) ?-)

> if one == 1:
>   ok = 1
> print ok
> 
> How do I establish before printing ok if it actually exists so as to
> avoid this exception?

The simplest way is to make sure the name will be defined whatever the 
value of the test:

one = 42
# ...
ok = (one == 1)
print ok


As a side note, if you want to check wether a name exists in the current 
namespace, you can use a try/except block:

try:
   toto
   print "toto is defined"
except NameError:
   print "toto is not defined"


From nmm1 at cus.cam.ac.uk  Fri Jan 12 04:29:19 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 12 Jan 2007 09:29:19 GMT
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org><50fudtF1g1nplU1@mid.individual.net><envur1$rq1$1@gemini.csx.cam.ac.uk><mailman.2480.1168350033.32031.python-list@python.org><Xns98B384E126F4Ctim111one@216.196.97.136><eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136>
	<eo539l$t3b$1@gemini.csx.cam.ac.uk>
	<mailman.2632.1168583141.32031.python-list@python.org>
Message-ID: <eo7kdf$a80$1@gemini.csx.cam.ac.uk>


In article <mailman.2632.1168583141.32031.python-list at python.org>,
"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
|> 
|> I would have thought that this sort of thing was a natural consequence
|> of rounding errors - if I round (or worse truncate) a binary, I can be off
|> by at most one, with an expectation of a half of a least significant digit,
|> while if I use hex digits, my expectation is around eight, and for decimal
|> around five...
|> 
|> So it would seem natural that errors would propagate 
|> faster on big base systems, AOTBE, but this may be 
|> a naive view.. 

Yes, indeed, and that is precisely why the "we must use binary" camp won
out.  The problem was that computers of the early 1970s were not quite
powerful enough to run real applications with simulated floating-point
arithmetic.  I am one of the half-dozen people who did ANY actual tests
on real numerical code, but there may have been some work since!

Nowadays, it would be easy, and it would make quite a good PhD.  The
points to look at would be the base and the rounding rules (including
IEEE rounding versus probabilistic versus last bit forced[*]).  We know
that the use or not of denormalised numbers and the exact details of
true rounding make essentially no difference.

In a world ruled by reason rather than spin, this investigation
would have been done before claiming that decimal floating-point is an
adequate replacement for binary for numerical work, but we don't live
in such a world.  No matter.  Almost everyone in the area agrees that
decimal floating-point isn't MUCH worse than binary, from a numerical
point of view :-)


[*] Assuming signed magnitude, calculate the answer truncated towards
zero but keep track of whether it is exact.  If not, force the last
bit to 1.  An old, cheap approximation to rounding.


Regards,
Nick Maclaren.


From fuzzyman at gmail.com  Tue Jan  2 07:41:52 2007
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Jan 2007 04:41:52 -0800
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167736083.756075.273450@s34g2000cwa.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<1167543262.361311.123700@v33g2000cwv.googlegroups.com>
	<etvgp25hjdju857j8o4spsj2jictceht6j@4ax.com>
	<1167736083.756075.273450@s34g2000cwa.googlegroups.com>
Message-ID: <1167741711.955824.26410@v33g2000cwv.googlegroups.com>


Ben Sizer wrote:
[snip..]
> I have no problem with something being configurable, but I do have a
> problem with Windows users being forced to jump through unnecessary
> hoops that Unix and MacOS users don't have to endure. And I think the
> default should be to edit the PATH and allow you to explicitly disallow
> this: changing from the current behaviour is the right thing to do
> because the current behaviour is wrong, in terms of cross-platform
> compatibility and usability.
>

I strongly agree with these sentiments.

Fuzzyman
http://www.voidspace.org.uk/python/articles.shtml

> -- 
> Ben Sizer



From bj_666 at gmx.net  Mon Jan 29 01:47:19 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 29 Jan 2007 07:47:19 +0100
Subject: decode overwrite variable?
References: <21235$45bd8f83$d8a87c2a$18298@NEXICOM.NET>
Message-ID: <pan.2007.01.29.06.47.17.519699@gmx.net>

In <21235$45bd8f83$d8a87c2a$18298 at NEXICOM.NET>, Jammer wrote:

> Will a failed decode overwrite the variable?
> 
> message = message.decode('iso-8859-1')
> or do I need to do
> msg = message.decode('iso-8859-1')

Why don't you just try?

In [2]: a = u'\u2022'

In [3]: a = a.decode('iso-8859-1')
---------------------------------------------------------------------------
exceptions.UnicodeEncodeError             Traceback (most recent call last)

/home/marc/<ipython console>

UnicodeEncodeError: 'ascii' codec can't encode character u'\u2022' in position 0: ordinal not in range(128)

In [4]: a
Out[4]: u'\u2022'

Ciao,
	Marc 'BlackJack' Rintsch



From kuldjlevelet at gmail.com  Thu Jan 18 06:58:22 2007
From: kuldjlevelet at gmail.com (0k-)
Date: 18 Jan 2007 03:58:22 -0800
Subject: classes: need for an explanation
Message-ID: <1169121502.779509.138890@m58g2000cwm.googlegroups.com>

hello!

i started to write a game in python in which i want to implement
"dynamically attachable" attributes.
my intention is to generalise this and moreover these attributes can be
complex, so i'm creating classes to represent these attributes. but
somehow i cannot instantiate these attribute classes well...

here is the simple outline of my code:

class Attr(object):
    name = ""
    value = ""
    def __init__(self, name, value):
        self.name = name
        self.value = value

# this is just an example, in the real game attrs. are more complex!
class TxtAttr(Attr):
    name = "text"
    def __init__(self, value):
        self.value = value

class Thing(object):
    props = {}
    def __init__(self):
        self.props["text"] = TxtAttr("something important")

t1 = Thing()
t2 = Thing()

t2.props["text"].value = "another string"

print "t1: %s\nt2: %s" % (t1.props["text"].value,
t2.props["text"].value)

the above code outputs:

t1: another string
t2: another string

so the problem i cannot get through is that both t1 and t2 have the
same attr class instance.
could somebody please explain me why? :)



From nszabolcs at gmail.com  Mon Jan 29 18:21:52 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 29 Jan 2007 15:21:52 -0800
Subject: python 2.3 module ref
In-Reply-To: <6178735.qJi6sMvOM0@teancum>
References: <6178735.qJi6sMvOM0@teancum>
Message-ID: <1170112912.468882.251250@a34g2000cwb.googlegroups.com>


> any pointers to a 2.3 module ref?

also look at:
http://rgruet.free.fr/PQR2.3.html#OtherModules

when coding for different python versions i can reccommend this quick 
ref:
http://rgruet.free.fr/

(every language feature is colorcoded according to the version when it 
was included)



From martin at v.loewis.de  Wed Jan 24 16:51:51 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 24 Jan 2007 22:51:51 +0100
Subject: raise UnicodeError, "label too long"
In-Reply-To: <1169675004.099912.79520@v33g2000cwv.googlegroups.com>
References: <1169672223.231030.262610@l53g2000cwa.googlegroups.com>
	<pan.2007.01.24.21.23.25.331322@gmx.net>
	<1169675004.099912.79520@v33g2000cwv.googlegroups.com>
Message-ID: <45B7D4F7.9020308@v.loewis.de>

Flavio schrieb:
> What I am doing is very simple:
> 
> I fetch an url (html page) parse it using BeautifulSoup, extract the
> links and try to open each of the links, repeating the cycle.
> 
> Beautiful soup converts the html to unicode. That's why when I try to
> open the links extracted from the page I get this error.
> 
> This is bad, since some links do contain strings with non-ascii
> characters.

Please try answering the exact question that Marc asked:
what is an example for unicode string that triggers the
exception?

Regards,
Martin


From tactics40 at gmail.com  Mon Jan 22 19:21:51 2007
From: tactics40 at gmail.com (tac-tics)
Date: 22 Jan 2007 16:21:51 -0800
Subject: arrow keys don't work
In-Reply-To: <pan.2007.01.23.00.14.29.144841@REMOVEME.cybersource.com.au>
References: <1169506381.452422.179070@11g2000cwr.googlegroups.com>
	<pan.2007.01.23.00.14.29.144841@REMOVEME.cybersource.com.au>
Message-ID: <1169511711.594390.167630@11g2000cwr.googlegroups.com>

> Have you changed your terminal (either the program itself or its config)
> so that it is no longer sending the correct codes?

I doubt this is the case. Everything works for the bash shell and
common lisp. It's just python acting up.

> When you hit the arrow key, what happens? Do you just get nothing at all,
> or do you get control characters appearing? e.g. ^Z or similar.

udlr yields ^[[A^[[B^[[C^[[D in the interactive python interpreter, but
like I said, works like it should outside the Python interpreter.



From gagsl-py at yahoo.com.ar  Thu Jan  4 22:47:43 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 05 Jan 2007 00:47:43 -0300
Subject: clarification on open file modes
In-Reply-To: <enke74$9j2$1@solaris.cc.vt.edu>
References: <enke74$9j2$1@solaris.cc.vt.edu>
Message-ID: <7.0.1.0.0.20070105004004.05b3bb08@yahoo.com.ar>

At Thursday 4/1/2007 23:46, tubby wrote:

>I understand that doing the following on Windows to a binary file (a
>jpeg or exe files for example) can cause file corruption, is that correct?
>
>fp = open(file_name, 'r')
>fp.close()
>
>How can a simple open in read mode corrupt data???

You can't corrupt *that* file if you only open it. But if you *read* 
it and process the input data, you'll get some garbage. And if you 
write such data (to the same file or another one), it will be corrupted.
Using "rb" or "wb" for binary files won't do any harm on systems 
where it doesn't matter, and it's the right way on systems where it does.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From bdesth.quelquechose at free.quelquepart.fr  Sat Jan  6 07:16:46 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 06 Jan 2007 13:16:46 +0100
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1168041434.385029.55870@38g2000cwa.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<1168041434.385029.55870@38g2000cwa.googlegroups.com>
Message-ID: <459f8cf8$0$290$426a74cc@news.free.fr>

Patrick Down a ?crit :
> jeremito wrote:
> 
>>I am writing a class that is intended to be subclassed.  What is the
>>proper way to indicate that a sub class must override a method?
>>
(snip)

> Decorators to the rescue?

(snip convoluted code)

What a strange idea...


From will at willmcgugan.com  Wed Jan 17 07:50:33 2007
From: will at willmcgugan.com (Will McGugan)
Date: 17 Jan 2007 04:50:33 -0800
Subject: generate tuples from sequence
In-Reply-To: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>
References: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>
Message-ID: <1169038232.198619.139900@v45g2000cwv.googlegroups.com>


Will McGugan wrote:

> Hi,
>
> I'd like a generator that takes a sequence and yields tuples containing
> n items of the sqeuence, but ignoring the 'odd' items. For example

Forgot to add, for my purposes I will always have a sequence with a
multiple of n items.


Will



From nagle at animats.com  Fri Jan  5 14:19:06 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 05 Jan 2007 19:19:06 GMT
Subject: MySQLdb windows binaries for Python 2.5?? Yes, but from a World
	of Warcraft guild.
In-Reply-To: <1168019043.523288.50770@38g2000cwa.googlegroups.com>
References: <1162408100.985370.148650@m7g2000cwm.googlegroups.com>
	<1163238145.257490.144410@b28g2000cwb.googlegroups.com>
	<mailman.2093.1163244341.11739.python-list@python.org>
	<Fgkgh.9311$hI.6215@newssvr11.news.prodigy.net>
	<Ulmgh.70$u%4.58@newsfe04.lga>
	<1166144355.616642.127080@n67g2000cwd.googlegroups.com>
	<x1pgh.9356$hI.3075@newssvr11.news.prodigy.net>
	<jOrgh.13632$wc5.10963@newssvr25.news.prodigy.net>
	<1168019043.523288.50770@38g2000cwa.googlegroups.com>
Message-ID: <Kwxnh.57300$qO4.34608@newssvr13.news.prodigy.net>

msj at infoserv.dk wrote:
> Anyone have a binary they want to share?
> 
> /Martin
> 
Somebody has an untested one.  See

http://sourceforge.net/forum/forum.php?thread_id=1571110&forum_id=70461

You have to ask for a copy; they don't want to distribute it and
be blamed for problems.

There hasn't been a new release of MySQLdb since April 2006, and
there's no official support for either Python 2.5 or Windows.
Realistically, you have to run Python 2.4 or earlier if you
need database access.  We dropped back to Python 2.4,
with good results.

				John Nagle


From nszabolcs at gmail.com  Tue Jan 30 10:08:34 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 30 Jan 2007 07:08:34 -0800
Subject: data design
In-Reply-To: <45bf5763$0$22792$426a34cc@news.free.fr>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
Message-ID: <1170169714.066396.227860@s48g2000cws.googlegroups.com>

> The lazy way to do this: have modules that initialize bunches of
> objects, attributes holding the data: the object is somehow the row of
> the "table", attribute names being the column. This is the way I
> proceeded up to now.
> Data input this way are almost "configuration data", with 2 big
> drawbacks:
>   - Only a python programmer can fix the file: this cant be called a
>     configuration file.
>   - Even for the author, these data aint easy to maintain.
>
> I feel pretty much ready to change this:
> - make these data true text data, easier to read and fix.
> - write the module that will make python objects out of these data:
> the extra cost should yield ease of use.
>
> 2 questions arise:
> - which kind of text data?
>      - csv: ok for simple attributes, not easy for lists or complex
>      data.
>      - xml: the form wont be easier to read than python code,
>        but an xml editor could be used, and a formal description
>        of what is expected can be used.
> - how can I make the data-to-object transformation both easy, and able
>    to spot errors in text data?
>
> Last, but not least: is there a python lib implementing at least part
> of this dream?

there is a csv parser and multiple xml parsers in python (eg 
xml.etree) also there is a ConfigParser module (able to parse .ini 
like config files)

i personally like the python module as config file the most

eg if you need a bunch of key-value pairs or lists of data:
* python's syntax is pretty nice (dict, tuples and lists or just 
key=value)
* xml is absolutely out of question
* csv is very limited
* .ini like config file for more complex stuff is not bad but then you 
can use .py as well.



From bruno.desthuilliers at gmail.com  Wed Jan 17 07:56:14 2007
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: 17 Jan 2007 04:56:14 -0800
Subject: 2.3-2.5 what improved?
In-Reply-To: <mailman.2817.1169029744.32031.python-list@python.org>
References: <mailman.2817.1169029744.32031.python-list@python.org>
Message-ID: <1169038574.260669.194760@s34g2000cwa.googlegroups.com>


Robin Becker a ?crit :
> A large cgi based web Python-2.3 application needs to be speed improved.
> experiments show the following under reasonable testing (these are 2 second
> reportlab pdf productions)
>
> 1) 2.3 --> 2.5 improvement small 1-2%
> 2) cgi --> fcgi improvement medium 10-12%
>
> I sort of remember claims being made about 2.5 being 10% faster than 2.4/2.3 etc
> etc. Can anyone say where the speedups were?

AFAIK, most of the speedup comes from optimization of the builtin dict
type, which is the central
data structure in Python. But anyway, as Robert pointed out, using CGI
means lauching
a new Python process for each and every HTTP request.

> Presumably we have a lot of old
> cruft that could be improved in some way eg moving loops into comprehensions,
> using iterator methods etc. Are those sort of things what we should look at?

Consider profiling your code before doing anything else - unless you're
planning on wasting your time.



From gagsl-py at yahoo.com.ar  Tue Jan  2 11:25:55 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 02 Jan 2007 13:25:55 -0300
Subject: trees, iterations and adding leaves
In-Reply-To: <op.tlfpchdny0t4kh@darkstar>
References: <op.tlfpchdny0t4kh@darkstar>
Message-ID: <7.0.1.0.0.20070102125732.05bfb898@yahoo.com.ar>

At Sunday 31/12/2006 14:25, vertigo wrote:

>I use nltk package - but it should not matter here.

Yes, it does. The framework should provide some form of tree traversal.

>So i wanted to 'travel thru my tree' to last node which should be changed:
> >>> tree6 = Tree('main', ['sub1', 'sub2'])
> >>> subtree = tree6[0]
> >>> subtree
>'sub1'
> >>> subtree = Tree('newsub',[])
> >>> subtree
>('newsub': )
> >>> tree6
>('main': 'sub1' 'sub2')
>The problem is that subtree is some kind of a new variable (not pointer)
>so changing it i will not alter tree6.

This, yes, is a general Python question. When you bind something to 
the name "subtree", it doesn't matter what were "subtree" pointing to 
before. Read http://effbot.org/zone/python-objects.htm

>How to alter tree6 while
>'travelling along it's nodes',
>without messy referencing as tree6[0][1][0][1][1][1][0].......... ?

Without any further knowledge of the Tree objects, you could do 
something like this:

def traverse_tree(tree, *ids):
     result = tree
     while ids:
         key = ids.pop(0)
         tree = tree[key]
     return tree

and say: traverse_tree(tree6, 0, 1, 0, 1, 1, 1, 0) or 
traverse_tree(tree6, *[0,1,0,1,1,1,0]) or traverse_tree(tree6, 
*[0,1,0,1,1])[0] = another_object


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From wolf_tracks at invalid.com  Sun Jan  7 14:20:35 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sun, 07 Jan 2007 11:20:35 -0800
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <1168194009.220437.286210@q40g2000cwq.googlegroups.com>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
	<mailman.2332.1168016502.32031.python-list@python.org>
	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>
	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>
	<yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>
	<mailman.2367.1168100759.32031.python-list@python.org>
	<fK_nh.25689$QU1.17301@newssvr22.news.prodigy.net>
	<w03oh.46$_k2.22@read3.inet.fi>
	<P69oh.32493$Gr2.29258@newssvr21.news.prodigy.net>
	<1168194009.220437.286210@q40g2000cwq.googlegroups.com>
Message-ID: <nKboh.11774$ZT3.8998@newssvr19.news.prodigy.com>

Gabriel Genellina wrote:
> On 7 ene, 13:22, "W. Watson" <wolf_tra... at invalid.com> wrote:
> 
>>>>> https://sourceforge.net/projects/pywin32/
> 
>> As I understand it, there are two files I'm after: 1. python interpreter,
>> and 2. a python editor. It's #2 that I'm having trouble downloading. The
>> link is broken.
> 
> The above link should work. Follow the instructions in a previous post.
> Note that in the last step, you have to choose a mirror for
> downloading; that mirrow might be down or out-of-sync so you might get
> an error there. Choose another mirrorr...
> 
> Note that you dont *need* PythonWin in order to use Python on Windows.
> The standard Python distribution works fine. Even includes a Python
> editor (IDLE) but you can use whichever editor you like to write your
> code (even Notepad...)
> 
We seem to be looping. I have the Python interpreter. I would like the 
pythonwin editor. The download link doesn't work on SourceForge. Where can I 
get it? If not there, where? If it can't be obtained, then I'll go to the 
default editor built into python-2.5.msi.


          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

              ""I do not fear death. I had been dead for billions
                and billions of years before I was born, and had
                not suffered the slightest inconvenience from it."
                    -- Mark Twain (a nod to evolution)
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From ptmcg at austin.rr.com  Mon Jan 29 00:20:47 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 28 Jan 2007 21:20:47 -0800
Subject: log parser design question
In-Reply-To: <raaor29enqdo2d8n98ma5l8hsdv828v6jf@4ax.com>
References: <raaor29enqdo2d8n98ma5l8hsdv828v6jf@4ax.com>
Message-ID: <1170048047.660118.164850@l53g2000cwa.googlegroups.com>

On Jan 27, 10:43 pm, avidfan <n... at nowhere.com> wrote:
> I need to parse a log file using python and I need some advice/wisdom
> on the best way to go about it:
>
> The log file entries will consist of something like this:
>
> ID=8688 IID=98889998 execute begin - 01.21.2007 status enabled
>         locked working.lock
>         status running
>         status complete
>
> ID=9009 IID=87234785 execute wait - 01.21.2007 status wait
>         waiting to lock
>         status wait
>         waiting on ID=8688
>
> and so on...
>
For the parsing of this data, here is a pyparsing approach.  Once 
parse, the pyparsing ParseResults data structures can be massaged into 
a queryable list.  See the examples at the end for accessing the 
individual parsed fields.

-- Paul

data = """
ID=8688 IID=98889998 execute begin - 01.21.2007 status enabled
        locked working.lock
        status running
        status complete


ID=9009 IID=87234785 execute wait - 01.21.2007 status wait
        waiting to lock
        status wait
        waiting on ID=8688

"""
from pyparsing import *

integer=Word(nums)
idref = "ID=" + integer.setResultsName("id")
iidref = "IID=" + integer.setResultsName("iid")
date = Regex(r"\d\d\.\d\d\.\d{4}")

logLabel = Group("execute" + oneOf("begin wait"))
logStatus = Group("status" + oneOf("enabled wait"))
lockQual = Group("locked" + Word(alphanums+"."))
waitingOnQual = Group("waiting on" + idref)
statusQual = Group("status" + oneOf("running complete wait"))
waitingToLockQual = Group(Literal("waiting to lock"))
statusQualifier = statusQual | waitingOnQual | waitingToLockQual | 
lockQual
logEntry = idref + iidref + logLabel.setResultsName("logtype") + "-" \
    + date + logStatus.setResultsName("status") \
    + ZeroOrMore(statusQualifier).setResultsName("quals")

for tokens in logEntry.searchString(data):
    print tokens
    print tokens.dump()
    print tokens.id
    print tokens.iid
    print tokens.status
    print tokens.quals
    print

prints:

['ID=', '8688', 'IID=', '98889998', ['execute', 'begin'], '-', 
'01.21.2007', ['status', 'enabled'], ['locked', 'working.lock'], 
['status', 'running'], ['status', 'complete']]
['ID=', '8688', 'IID=', '98889998', ['execute', 'begin'], '-', 
'01.21.2007', ['status', 'enabled'], ['locked', 'working.lock'], 
['status', 'running'], ['status', 'complete']]
- id: 8688
- iid: 98889998
- logtype: ['execute', 'begin']
- quals: [['locked', 'working.lock'], ['status', 'running'], 
['status', 'complete']]
- status: ['status', 'enabled']
8688
98889998
['status', 'enabled']
[['locked', 'working.lock'], ['status', 'running'], ['status', 
'complete']]

['ID=', '9009', 'IID=', '87234785', ['execute', 'wait'], '-', 
'01.21.2007', ['status', 'wait'], ['waiting to lock'], ['status', 
'wait'], ['waiting on', 'ID=', '8688']]
['ID=', '9009', 'IID=', '87234785', ['execute', 'wait'], '-', 
'01.21.2007', ['status', 'wait'], ['waiting to lock'], ['status', 
'wait'], ['waiting on', 'ID=', '8688']]
- id: 9009
- iid: 87234785
- logtype: ['execute', 'wait']
- quals: [['waiting to lock'], ['status', 'wait'], ['waiting on', 
'ID=', '8688']]
- status: ['status', 'wait']
9009
87234785
['status', 'wait']
[['waiting to lock'], ['status', 'wait'], ['waiting on', 'ID=', 
'8688']]



From pavlovevidence at gmail.com  Wed Jan 10 16:37:38 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 10 Jan 2007 13:37:38 -0800
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
	<1168042215.514023.121560@s80g2000cwa.googlegroups.com>
	<1168048620.409190.85870@v33g2000cwv.googlegroups.com>
	<1168130960.670978.111850@s34g2000cwa.googlegroups.com>
	<1168209637.965967.23790@s34g2000cwa.googlegroups.com>
	<1168443236.166170.265770@77g2000hsv.googlegroups.com>
Message-ID: <1168465058.250744.224210@p59g2000hsd.googlegroups.com>

Martin Miller wrote:
> Carl Banks wrote:

> > Because the usage deceptively suggests that it defines a name in the
> > local namespace.  Failing may be too strong a word, but I've come to
> > expect a consistent behavior w.r.t. namespaces, which this violates, so
> > I think it qualifies as a failure.
>
> I don't see how the usage deceptively suggests this at all. In this
> case -- your sample code for fun() and fun2() -- all were simply
> Pin('aap'). Since no additional namespace argument was supplied,

Exactly.  In normal Python, to create a global variable in a local
context, you must specify the namespace.  Normally, variables are
always created in the most local context in Python, only.  So now you
come in with this this spiffy "look, it creates the variable for you!"
class, but it completely goes against normal Python behavior by
creating the variable in the global namespace even when in a local
context.  I think that is deceptive and confusing behvaior for
something that claims to create variables for you.


> > I think programmatically creating variables is fine; I just recommend
> > you not use sys._getframe, nor the automagical namespace self-insertion
> > class, to do it.
>
> You've explained some of your worries about sys._getframe. It would
> be interesting to hear specifically what it is you don't like about
> the idea of namespace self-insertion -- mainly because of the local
> namespace limitation?

The local namespace thing has nothing to do with it; I would still be
very much against this even if it did work for locals.  My main problem
with this is it saddles the class with behavior that interferes with
using it as a normal class.  For instance, if you wanted to do
something like this:

def fun(pin_name):
    p = Pin(pin_name)
    do_something_with(p)

At least it looks like it works!  But it works only with the
undesriable side-effect of creating a global variable of some unknown
name.  It could be no big deal, or it could be a gaping security hole.
(Yes, I know you can just pass in an empty namespace.  Thanks for that.
 Nice to know it's at least possible to jump though hoops just to
regain normal usage of the class.)

The problem here, see, is the hubris of the author in thinking that he
can anticipate all possble uses of a class (or at least that he can
presume that no user will ever want to use the class in a normal way).
Of course, no author can ever anticipate all possible uses of their
code, and it's inevitable that users will want to use code in a way the
author didn't intend.  Most often it's not any hubris on the author's
part, but mere ignorance, and is forgivable.

But when the author deliberately does extra work to cut the user off
from normal usage, then ignorance is no longer a defense: the normal
way was considered, and the author sanctimoniously decided on the
user's behalf that the user would never want or need normal usage of
the class.  That is a lot less forgivable.

If you want to respect the user, your class is going to have to change.

1. Reprogram the class so that, BY DEFAULT, it works normally, and only
inserts itself into a namespace when specifically requested.  Then, at
least, users can ignore the autoinsertion silliness if they don't want
to use it.  Plus, it affords better documentation to readers who don't
know aren't in on the secret of this Pin class (seeing an
"autoinsert=True" passed to the constructor is a clue something's going
on).

2. (Better, IMO) Write a well-named function to do it.  E.g.:

def create_global_Pin_variable(name,namespace=None):
    if namespace is None:
        namespace = sys._getframe(1).f_globals
    namespace[name] = Pin(name)

Leave it out of the class.  Classes are better off when they only worry
about what's going on in their own namespaces.  Leave dealing with
external namespaces to an external function.  The function's name
documents the fact that: you're creating a variable, it's global, it's
a Pin.  You've gotten surprise down to a small as you're going to get
it.


Carl Banks



From laurent.pointal at limsi.fr  Wed Jan 10 08:49:33 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 10 Jan 2007 14:49:33 +0100
Subject: maximum number of threads
In-Reply-To: <mailman.2528.1168429308.32031.python-list@python.org>
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl>	<mailman.2522.1168423062.32031.python-list@python.org>
	<mailman.2528.1168429308.32031.python-list@python.org>
Message-ID: <eo2rl6$41s$1@upsn250.cri.u-psud.fr>

Paul Sijben a ?crit :
> Gabriel Genellina wrote:
>> Simply you can't, as you can't have 10000 open files at once. Computer
>> resources are not infinite.
> 
> sure but *how* fast they run out is the issue here
> 
>> Do you really need so many threads? 
> 
> I might be able to do with a few less but I still need many.
> 
> I have done a quick test.
> 
> on WinXP I can create 1030 threads
> on Fedora Core 6 I can only create 301 (both python2.4 and 2.5)
> 
> now the 301 is rather low I'd say.

This is a system configurable limit (up to a maximum).

See ulimit man pages.

test

	ulimit -a

to see what are the current limits, and try with

	ulimit -u 2000

to modify the maximum number of user process (AFAIK each thread use a
process entry on Linux)

> 
> Paul
> 


From walter at livinglogic.de  Wed Jan 31 11:47:39 2007
From: walter at livinglogic.de (=?ISO-8859-1?Q?Walter_D=F6rwald?=)
Date: Wed, 31 Jan 2007 17:47:39 +0100
Subject: Unicode error handler
In-Reply-To: <1170217309.125918.214060@v33g2000cwv.googlegroups.com>
References: <epdmae$qps$1@sea.gmane.org>	<mailman.3314.1170174675.32031.python-list@python.org>
	<1170217309.125918.214060@v33g2000cwv.googlegroups.com>
Message-ID: <45C0C82B.5080507@livinglogic.de>

Hieu.D.Hoang at gmail.com wrote:
> On Jan 30, 11:28 pm, Walter D?rwald <wal... at livinglogic.de> wrote:
> 
>> codecs.register_error("transliterate", transliterate)
>>
>>    Walter
> 
> Really, really slick solution.
> Though, why was it [:1], not [0]? ;-)

No particular reason, unicodedata.normalize("NFD", ...) should never
return an empty string.

> And one more thing:
>> def transliterate(exc):
>>         if not isinstance(exc, UnicodeEncodeError):
>>                 raise TypeError("don'ty know how to handle %r" % r)
> I don't understand what %r and r are and where they are from. The man
> 3 printf page doesn't have %r formatting.

%r means format the repr() result, and r was supposed to be exc. ;)

Servus,
   Walter


From paddy3118 at netscape.net  Wed Jan 24 16:53:19 2007
From: paddy3118 at netscape.net (Paddy)
Date: 24 Jan 2007 13:53:19 -0800
Subject: The reliability of python threads
In-Reply-To: <mailman.3105.1169664198.32031.python-list@python.org>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
Message-ID: <1169675599.502726.5070@a34g2000cwb.googlegroups.com>



On Jan 24, 6:43 pm, "Carl J. Van Arsdall" <cvanarsd... at mvista.com>
wrote:
> Chris Mellon wrote:
> > On 24 Jan 2007 18:21:38 GMT, Nick Maclaren <n... at cus.cam.ac.uk> wrote:
>
> >> [snip]
>
> > I'm aware of the issues with the POSIX threading model. I still stand
> > by my statement - bringing up the problems with the provability of
> > correctness in the POSIX model amounts to FUD in a discussion of
> > actual problems with actual code.
>
> > Logic and programming errors in user code are far more likely to be
> > the cause of random errors in a threaded program than theoretical
> > (I've never come across a case in practice) issues with the POSIX
> > standard.
> Yea, typically I would think that.  The problem I am seeing is
> incredibly intermittent.  Like a simple pyro server that gives me a
> problem maybe every three or four months.  Just something funky will
> happen to the state of the whole thing, some bad data, i'm having an
> issue tracking it down and some more experienced programmers mentioned
> that its most likely a race condition.  THe thing is, I'm really not
> doing anything too crazy, so i'm having difficult tracking it down.  I
> had heard in the past that there may be issues with threads, so I
> thought to investigate this side of things.
>
> It still proves difficult, but reassurance of the threading model helps
> me focus my efforts.
>
<SNIP>
> -carl

Three to four months before `strange errors`? I'd spend some time
correlating logs; not just for your program, but for everything running

on the server. Then I'd expect to cut my losses and arrange to safely
re-start the program every TWO months.
(I'd arrange the re-start after collecting logs but before their
analysis.
Life is too short).

- Paddy.



From robert.kern at gmail.com  Thu Jan 11 18:27:22 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 11 Jan 2007 17:27:22 -0600
Subject: Intellectual Property Talk at PyCon
In-Reply-To: <eo6df3$9li$1@sea.gmane.org>
References: <eo6df3$9li$1@sea.gmane.org>
Message-ID: <eo6h51$nmr$1@sea.gmane.org>

VanL wrote:
> - What it means to incorporate GPL'd modules into your own code

I don't have any suggestions for other material to cover, but I'd like to
express my interest in keeping this in your agenda. This is an issue that crops
up again and again with ill-informed opinions all around.

Of course, it would be nice if what you say agrees with my opinions on the
subject, but I'll let you slide if you at least say something sensible.  ;-)

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From paul.sijben at xs4all.nl  Wed Jan 10 06:41:38 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Wed, 10 Jan 2007 12:41:38 +0100
Subject: maximum number of threads
In-Reply-To: <mailman.2522.1168423062.32031.python-list@python.org>
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl>
	<mailman.2522.1168423062.32031.python-list@python.org>
Message-ID: <45A4D0F2.40001@xs4all.nl>

Gabriel Genellina wrote:
> 
> Simply you can't, as you can't have 10000 open files at once. Computer
> resources are not infinite.

sure but *how* fast they run out is the issue here

> Do you really need so many threads? 

I might be able to do with a few less but I still need many.

I have done a quick test.

on WinXP I can create 1030 threads
on Fedora Core 6 I can only create 301 (both python2.4 and 2.5)

now the 301 is rather low I'd say.

Paul



From gagsl-py at yahoo.com.ar  Fri Jan 19 11:05:46 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 13:05:46 -0300
Subject: Why do I have to call del explicitly for com objects?
References: <1169210578.544593.310100@v45g2000cwv.googlegroups.com>
Message-ID: <eoqsme$8qf$1@sea.gmane.org>

<bg_ie at yahoo.com> escribi? en el mensaje 
news:1169210578.544593.310100 at v45g2000cwv.googlegroups.com...

> I'm creating objects in my python script belonging to a COM object
> which I dispatch using win32com.client.DispatchEx. Hence, dllhost.dll
> is the concerned process. The problem is that the objects destructor
> within the com object is not called if the object lives past a certain
> number of seconds. For example, this function will not call the
> destructor concerned with obj unless the sleep is commented out.
>
> def fnction:
>  obj = comobj.createACertainObject()
>  obj.doStuff()
>  sleep(10)
>  obj.doMoreStuff()
>  #del obj

I don't understand the case.
del does not invoke a destructor, just decrements the object's reference 
count. When the rc reaches zero, the object is a candidate for GC. That is, 
"some time in the future", the GC would destroy it (unless it's part of a 
circular reference chain...)
So, *inside* your function, there is a reference held by the local variable 
obj. It is decremented automatically when you exit the function (and obj 
gets out of scope) or if you explicitely use del.
You can use sys.getrefcount() to see how many references an object has. (The 
output is +1 because getrefcount() has a temporary reference to the object 
too).

py> x="Hello World"
py> sys.getrefcount(x)
2

See how many references your obj have. After calling doStuff or doMoreStuff, 
you can have more references if those functions store `self` somewhere, or 
pass it to another method that does so.

> It seems to me that the GC forgets about obj after a certain amount of
> time. I can force the destructor to be called using del obj at the end
> of my function, but why do I have to call this explicitly?
If del obj works at the end, exiting the function should work too. Both ways 
you decrement the rc. There is something *more* in here.

-- 
Gabriel Genellina 




From nmm1 at cus.cam.ac.uk  Thu Jan 11 18:47:17 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 11 Jan 2007 23:47:17 GMT
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<mailman.2597.1168550439.32031.python-list@python.org>
Message-ID: <eo6ia5$5bt$1@gemini.csx.cam.ac.uk>


In article <mailman.2597.1168550439.32031.python-list at python.org>,
Facundo Batista <facundo at taniquetil.com.ar> writes:
|> Noud Aldenhoven wrote:
|> 
|> > When I was programming in a mathematical project I began to wonder if python
|> > supports rational numbers[1]. In a language like magma[2] it's not such a
|> > problem. Does python supports something simular?
|> 
|> Python does not have rational numbers.
|> 
|> There's a (rejected) PEP about this, PEP-239:
|> 
|>   http://www.python.org/dev/peps/pep-0239/
|> 
|> Maybe you also want to read the section "Why not rational?" of
|> PEP-327...
|> 
|>   http://www.python.org/dev/peps/pep-0327/#why-not-rational

Oh, God.  Decimal delusions again :-(

There are good arguments for not having a rational type, but the idea
that decimal floating-point is in any way a replacement is cuckoo.
The desirable properties that rationals and decimal arithmetic provide
are both genuine and are almost entirely different ....

There are also perfectly good representations that don't have the
performance implications mentioned:  fixed and floating slash arithmetic.
They are mathematically quite interesting, and have some desirable
properties not shared by any floating-point format: e.g. if the result
is theoretically a rational with small numerator and denominator, then
they are very likely to return it.  I implemented fixed slash once, and
it is very easy to do - all it needs is a GCD routine - like rational,
it would be straightforward to add to Python as an extension type.


Regards,
Nick Maclaren.


From jstroud at mbi.ucla.edu  Sat Jan 20 18:59:41 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 20 Jan 2007 15:59:41 -0800
Subject: regexp qns
In-Reply-To: <1169269793.713444.152110@a75g2000cwd.googlegroups.com>
References: <1169268024.164643.71320@l53g2000cwa.googlegroups.com>
	<eos6v7$4go$1@zinnia.noc.ucla.edu>
	<1169269793.713444.152110@a75g2000cwd.googlegroups.com>
Message-ID: <eouadd$j09$1@zinnia.noc.ucla.edu>

eight02645999 at yahoo.com wrote:
> James Stroud wrote:
> 
>>eight02645999 at yahoo.com wrote:
>>
>>>hi
>>>suppose i have a string like
>>>
>>>test1?test2t-test3*test4*test5$test6#test7*test8
>>>
>>>how can i construct the regexp to get test3*test4*test5 and
>>>test7*test8, ie, i want to match * and the words before and after?
>>>thanks
>>>
>>
>>
>>py> import re
>>py> s = 'test1?test2t-test3*test4*test5$test6#test7*test8'
>>py> r = re.compile(r'(test\d(?:\*test\d)+)')
>>py> r.findall(s)
>>['test3*test4*test5', 'test7*test8']
>>
>>James
> 
> 
> thanks !
> I check the regexp doc it says:
> """
> (?:...)
>     A non-grouping version of regular parentheses. Matches whatever
> regular expression is inside the parentheses, but the substring matched
> by the group cannot be retrieved after performing a match or referenced
> later in the pattern.
> """
> but i could not understand this : r'(test\d(?:\*test\d)+)'. which
> parenthesis is it referring to? Sorry, could you explain the solution ?
> thanks
> 

The outer parentheses are the grouping operator. These are saved and 
accessible from a match object via group() or groups() methods. The "\d" 
part matches a single digit 0-1. The (?:....) construct is used to make 
a non-grouping operator that is not itself remembered for access through 
the group() or groups() methods. The expression can also reference 
earlier groups, but not groups specified with the non-grouping operator.

You may want to note that this is the most specific regular expression 
that would match your given example.

James


From paddy3118 at netscape.net  Sat Jan  6 12:07:38 2007
From: paddy3118 at netscape.net (Paddy)
Date: 6 Jan 2007 09:07:38 -0800
Subject: Python re expr from Perl to Python
In-Reply-To: <GzOnh.112$a81.91@nntpserver.swip.net>
References: <GzOnh.112$a81.91@nntpserver.swip.net>
Message-ID: <1168103258.602286.146100@42g2000cwt.googlegroups.com>


Michael M. wrote:

> In Perl, it was:
>
>
>    ## Example: "Abc | def | ghi | jkl"
>    ##       -> "Abc ghi jkl"
>    ## Take only the text betewwn the 2nd pipe (=cut the text in the 1st
> pipe).
>    $na =~ s/\ \|(.*?)\ \|(.*?)\ \|/$2/g;
>
>    ## -- remove [ and ] in text
>    $na =~ s/\[//g;
>    $na =~ s/\]//g;
>    # print "DEB: \"$na\"\n";
>
>
> # input string
> na="Abc | def | ghi | jkl [gugu]"
> # output
> na="Abc ghi jkl gugu"
>
>
> How is it done in Python?

Here is how to do it without regexps in python.
The first and last line below are all that are needed. The others show
intermediate expressions that lead to the result.

>>> from itertools import groupby

>>> na="Abc | def | ghi | jkl [gugu]"
>>> [(g[0], ''.join(g[1])) for g in groupby(na, lambda c: c not in ' \t|[]')]
[(True, 'Abc'), (False, ' | '), (True, 'def'), (False, ' | '), (True,
'ghi'), (False, ' | '), (True, 'jkl'), (False, ' ['), (True, 'gugu'),
(False, ']')]
>>> [''.join(g[1]) for g in groupby(na, lambda c: c not in ' \t|[]') if g[0]]
['Abc', 'def', 'ghi', 'jkl', 'gugu']

>>> ' '.join(''.join(g[1]) for g in groupby(na, lambda c: c not in ' \t|[]') if g[0])
'Abc def ghi jkl gugu'
>>> 


- Paddy.



From skip at pobox.com  Wed Jan 24 16:14:36 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 24 Jan 2007 15:14:36 -0600
Subject: Python does not play well with others
In-Reply-To: <XUOth.37107$Gr2.33940@newssvr21.news.prodigy.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<xqxirex3psq.fsf@cola3.ca.boeing.com>
	<suMth.75341$wP1.17392@newssvr14.news.prodigy.net>
	<mailman.3096.1169659857.32031.python-list@python.org>
	<XUOth.37107$Gr2.33940@newssvr21.news.prodigy.net>
Message-ID: <17847.52284.446369.999461@montanaro.dyndns.org>


    John> Python is the only major open source project I've encountered
    John> where there's so much hostility to bug reports.

You're misinterpreting lack of time (or itches that need scratching by the
people willing to do the work) for hostility.  Lest you think that there is
no activity on bugs, scan the python-checkins mailing list archive:

    http://mail.python.org/pipermail/python-checkins/

Grepping through the January mbox archive I see 96 different bug ids
mentioned in the checkins.  For December I see 116 different ids.  I could
go back farther, but I'll let you do that.

Skip


From tomerfiliba at gmail.com  Thu Jan 25 06:42:54 2007
From: tomerfiliba at gmail.com (gangesmaster)
Date: 25 Jan 2007 03:42:54 -0800
Subject: free variables /cell objects question
In-Reply-To: <mailman.3047.1169599631.32031.python-list@python.org>
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com>
	<1169563580.634000.122540@v45g2000cwv.googlegroups.com>
	<mailman.3047.1169599631.32031.python-list@python.org>
Message-ID: <1169725374.504546.153890@v33g2000cwv.googlegroups.com>

no, it has nothing to do with "i" being global.

>>> tuple(lambda: i for i in range(10))[0]()
9
>>> tuple(lambda: i for i in range(10))[1]()
9

what i see as a bug is this code not working as expected:

>>> def make_foos(names):
...     funcs = []
...     for n in names:
...             def foo():
...                     print "my name is", n
...             funcs.append(foo)
...     return funcs
...
>>> foos = make_foos(["hello", "world", "spam", "bacon"])
>>> foos[0]()
my name is bacon
>>> foos[1]()
my name is bacon
>>> foos[2]()
my name is bacon
>>>

i have to create yet another closure, make_foo, so that the name
is correctly bound to the object, rather than the frame's slot:

>>> def make_foo(name):
...     def foo():
...             print "my name is", name
...     return foo
...
>>> def make_foos(names):
...     return [make_foo(n) for n in names]
...
>>> foos = make_foos(["hello", "world", "spam", "bacon"])
>>> foos[0]()
my name is hello
>>> foos[1]()
my name is world
>>> foos[2]()
my name is spam


-tomer

On Jan 24, 2:46 am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "gangesmaster" <tomerfil... at gmail.com> wrote in messagenews:1169563580.634000.122540 at v45g2000cwv.googlegroups.com...
> | so this is why [lambda: i for i in range(10)] will always return 9.
>
> No, it returns a list of 10 identical functions which each return the
> current (when executed) global (module) variable i. Except for names,
> 'lambda:i' abbreviates 'def f(): return i'.
>
> >>> a=[lambda: i for i in range(10)]
> >>> i=42
> >>> for j in range(10): print a[j]()42
> 42
> 42
> 42
> 42
> 42
> 42
> 42
> 42
> 42
>
> >>> for i in range(10): print a[i]()0
> 1
> 2
> 3
> 4
> 5
> 6
> 7
> 8
> 9
>
> >>> del i
> >>> for j in range(10): print a[j]()Traceback (most recent call last):
>   File "<pyshell#23>", line 1, in -toplevel-
>     for j in range(10): print a[j]()
>   File "<pyshell#8>", line 1, in <lambda>
>     a=[lambda: i for i in range(10)]
> NameError: global name 'i' is not defined
>
> | imho that's a bug, not a feature.
>
> The developers now think it a mistake to let the list comp variable 'leak'
> into the global scope.  It leads to the sort of confusion that you
> repeated.  In Py3, the leak will be plugged, so one will get an exception,
> as in the last example, unless i (or whatever) is defined outside the list
> comp.
> 
> Terry Jan Reedy



From wolf_tracks at invalid.com  Sat Jan  6 02:54:14 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sat, 06 Jan 2007 07:54:14 GMT
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <mailman.2332.1168016502.32031.python-list@python.org>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
	<mailman.2332.1168016502.32031.python-list@python.org>
Message-ID: <GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>

Laszlo Nagy wrote:
> W. Watson wrote:
>> What do I download to use Python with MX XP Pro on an ASUS 4 year old 
>> motherboard? I would guess a good book source for starters would be 
>> the O'Reilly book.
>>   
> You mean Microsoft XP Pro?
> 
> For a beginner, the motherboard does not really matter. First of all, 
> you should download Python itself:
> 
> http://www.python.org/download/
> 
> or more probably:
> 
> http://www.python.org/ftp/python/2.5/python-2.5.msi
> 
> Then you should download a good editor. There are many, listed here: 
> http://wiki.python.org/moin/PythonEditors
> Under Windows, for a beginner, I would recommend pythonwin, but you can 
> decide.
> 
> Finally, you can start practicing. A book is always good. You can read 
> online tutorials too:
> 
> http://docs.python.org/tut/
> http://www.awaretek.com/tutorials.html
> 
> 
> Regards,
> 
>  Laszlo
> 
Many thanks. I've been impressed lately what one finds in Wikipedia. The 
first such occurrence was when I find all the release dates for a photo 
software package that I use. Not even the mfger had that!


          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

              ""I do not fear death. I had been dead for billions
                and billions of years before I was born, and had
                not suffered the slightest inconvenience from it."
                    -- Mark Twain (a nod to evolution)
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From paul.rudin at ntlworld.com  Sun Jan 14 01:06:59 2007
From: paul.rudin at ntlworld.com (Paul Rudin)
Date: Sun, 14 Jan 2007 06:06:59 +0000
Subject: mod_python and Content-Type
References: <8764bbb6jt.fsf@rudin.co.uk>
	<1168740637.544535.113490@38g2000cwa.googlegroups.com>
Message-ID: <87wt3q9m64.fsf@rudin.co.uk>

"Graham Dumpleton" <grahamd at dscpl.com.au> writes:


> All headers which come from the client are available through the
> 'headers_in'
> attribute of the request object. Eg.
>
>   def handler(req):
>     ct = req.headers_in.get('Content-Type')
>     ...

Thanks - it's even mentioned in the mod_python manual. Don't know how
I missed it :(


From hat at se-126.se.wtb.tue.nl  Wed Jan 17 07:02:55 2007
From: hat at se-126.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 17 Jan 2007 13:02:55 +0100
Subject: Distributed computation of jobs (was: Parallel Python)
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
	<1168597288.571937.176430@s34g2000cwa.googlegroups.com>
	<eo7sj1$vn6$1@news.albasani.net>
Message-ID: <slrneqs43f.p5f.hat@se-126.se.wtb.tue.nl>

On 2007-01-12, robert <no-spam at no-spam-no-spam.invalid> wrote:
>> 
>> [1] http://www.python.org/pypi/parallel
>
> I'd be interested in an overview.
> For ease of use a major criterion for me would be a pure python 
> solution, which also does the job of starting and controlling the 
> other process(es) automatically right (by default) on common 
> platforms.

Let me add a few cents to the discussion with this announcement:

About three years ago, I wrote two Python modules, one called 'exec_proxy',
which uses ssh to run another exec_proxy instance at a remote machine, thus
providing ligh-weight transparent access to a machine across a network.

The idea behind this module was/is that by just using ssh you have network
transparency, much more light weight than most other distributed modules where
you have to start deamons at all machines.
Recently, the 'rthread' module was announced which takes the same approach (it
seems from the announcement). I have not compared both modules with each other.


The more interesting Python module called 'batchlib' lies on top of the former
(or any other module that provides transparency across the network). It
handles distribution of computation jobs in the form of a 'start-computation'
and 'get-results' pair of functions.

That is, you give it a set of machines it may use, you say to the entry-point,
compute for me this-and-this function with this-and-this parameters, and
batchlib does the rest.
(that is, it finds a free machine, copies the parameters over the network, runs
the job, the result is transported back, and you can get the result of a
computation by using the same (uniq) identification given by you when the job
was given to batchlib.)

We used it as computation backend for optimization problems, but since
'computation job' may mean anything, the module should be very generically
applicable.


Compared to most other parallel/distributed modules, I think that the other
modules more-or-less compare with exec_proxy (that is, they stop with
transparent network access), where exec_proxy was designed to have minimal
impact on required infra structure (ie just ssh or rsh which is generally
already available) and thus without many of the features available from the
other modules.

Batchlib starts where exec_proxy ends, namely lifting network primitives to the
level of providing a simple way of doing distributed computations (in the case
of exec_proxy, without adding network infra structure such as deamons).




Until now, both modules were used in-house, and it was not clear what we wanted
to do further with the software. Recently, we have decided that we have no
further use for this software (we think we want to move into a different
direction), clearing the way to release this software to the community.

You can get the software from my home page http://seweb.se.wtb.tue.nl/~hat
Both packages can be downloaded, and include documentation and an example.
The bad news is that I will not be able to do further development of these
modules. The code is 'end-of-life' for us.


Maybe you find the software useful,
Albert


From facundo at taniquetil.com.ar  Thu Jan 25 13:09:29 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Thu, 25 Jan 2007 18:09:29 +0000 (UTC)
Subject: Email attachments
References: <ep7teg$ua6$1@sea.gmane.org>
Message-ID: <eparoo$oaf$1@sea.gmane.org>

Steve Holden wrote:

> I'm having some trouble getting attachments right for all recipients, 
> and it seems like Apple's mail.app is the pickiest client at the moment. 
> It doesn't handle attachments that both Thunderbird and Outlook find 
> perfectly acceptable.

The following code works ok with Thunderbird and mail.app (at least with
all the mail I usually sent).

A friend of mine reports that he (with mail.app can see that he has an
attachment, open it, etc.)

-----------------------------------

import smtplib
from email.MIMEMultipart import MIMEMultipart
from email.MIMEBase import MIMEBase
from email.MIMEText import MIMEText
from email.Utils import COMMASPACE, formatdate
from email import Encoders

class MailSender:
    '''Envia un mail con archivos attached.'''
    def __init__(self, server, remitente, to):
        self.server = server
        self.remitente = remitente 
        self.to = to
        assert type(self.to)==list

    def envia(self, subject, text, files=[]):
        assert type(files)==list
    
        msg = MIMEMultipart()
        msg['From'] = self.remitente
        msg['To'] = COMMASPACE.join(self.to)
        msg['Date'] = formatdate(localtime=True)
        msg['Subject'] = subject 
    
        msg.attach( MIMEText(text) )
        
        for file in files:
            part = MIMEBase('application', "octet-stream")
            part.set_payload( open(file,"rb").read() )
            Encoders.encode_base64(part)
            part.add_header('Content-Disposition', 'attachment; filename="%s"' % os.path.basename(file))
            msg.attach(part)
    
        smtp = smtplib.SMTP(self.server)
        smtp.sendmail(self.remitente, self.to, msg.as_string())
        smtp.close()
        return

-----------------------------------

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From sjmachin at lexicon.net  Mon Jan 15 03:06:48 2007
From: sjmachin at lexicon.net (John Machin)
Date: 15 Jan 2007 00:06:48 -0800
Subject: How naive is Python?
In-Reply-To: <mailman.2724.1168834095.32031.python-list@python.org>
References: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>
	<mailman.2724.1168834095.32031.python-list@python.org>
Message-ID: <1168848408.785931.285160@q2g2000cwa.googlegroups.com>


skip at pobox.com wrote:
> John> How naive (in the sense that compiler people use the term) is the
>     John> current Python system?  For example:
>
>     John>       def foo() :
>     John>           s = "This is a test"
>     John>           return(s)
>
>     John>          s2 = foo()
>
>     John> How many times does the string get copied?
>
> Never.  s and s2 just refer to the same object (strings are immutable).
> Executing this:
>
>     def foo() :
>         print id("This is a test")
>         s = "This is a test"
>         print id(s)
>         return(s)
>
>     s2 = foo()
>     print id(s2)
>
> prints the same value three times.
>
>     John> Or, for example:
>
>     John>       s1 = "Test1"
>     John>       s2 = "Test2"
>     John>       s3 = "Test3"
>     John>       s = s1 + s2 + s3
>
>     John> Any redundant copies performed, or is that case optimized?
>
> Not optimized.  You can see that using the dis module:
>
>   4           0 LOAD_CONST               1 ('Test1')
>               3 STORE_FAST               0 (s1)
>
>   5           6 LOAD_CONST               2 ('Test2')
>               9 STORE_FAST               1 (s2)
>
>   6          12 LOAD_CONST               3 ('Test3')
>              15 STORE_FAST               2 (s3)
>
>   7          18 LOAD_FAST                0 (s1)
>              21 LOAD_FAST                1 (s2)
>              24 BINARY_ADD
>              25 LOAD_FAST                2 (s3)
>              28 BINARY_ADD
>              29 STORE_FAST               3 (s)
>              32 LOAD_CONST               0 (None)
>              35 RETURN_VALUE
>
> The BINARY_ADD opcode creates a new string.
>
>     John> How about this?
>
>     John>       kcount = 1000
>     John>       s = ''
>     John>       for i in range(kcount) :
>     John>           s += str(i) + ' '
>
>     John> Is this O(N) or O(N^2) because of recopying of "s"?
>
> O(N).  Here's a demonstration of that:
>
>     #!/usr/bin/env python
>
>     from __future__ import division
>
>     def foo(kcount):
>         s = ''
>         for i in xrange(kcount) :
>             s += str(i) + ' '
>
>     import time
>
>     for i in xrange(5,25):
>         t = time.time()
>         foo(2**i)
>         t = time.time() - t
>         print 2**i, t, t/2**i
>
> On my laptop t roughly doubles for each iteration and prints around 5e-06
> for t/2**i in all cases.

Sorry, Skip, but I find that very hard to believe. The foo() function
would take quadratic time if it were merely adding on pieces of
constant size -- however len(str(i)) is not a constant, it is
O(log10(i)), so the time should be super-quadratic. Following are the
results I got with Python 2.5, Windows XP Pro, 3.2Ghz Intel dual-core
processor with the last line changed to print i, 2**i, t, t/2**i coz I
can't do log2() in my head :-)

[snip]
18 262144 0.889999866486 3.39508005709e-006
19 524288 3.21900010109 6.13975544184e-006
20 1048576 12.2969999313 1.17273330034e-005
21 2097152 54.25 2.58684158325e-005
22 4194304 229.0 5.45978546143e-005
[k/b interrupt]

Cheers,
John



From duncan.booth at invalid.invalid  Tue Jan 23 07:11:31 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 Jan 2007 12:11:31 GMT
Subject: free variables /cell objects question
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com>
Message-ID: <Xns98C17C03B6297duncanbooth@127.0.0.1>

"gangesmaster" <tomerfiliba at gmail.com> wrote:

> what problem does the cell object solve? 

The closure represents the variable, not the object. So if x is rebound to 
a different object your inner function g() will now access the new object. 
If the object itself was passed to MAKE_CLOSURE then g would only ever see 
the value of x from the instant when g was defined.

>>> def f(x):
    def g():
        print "x is", x
    g()
    x += 1
    g()

	
>>> f(1)
x is 1
x is 2



From rschroev_nospam_ml at fastmail.fm  Sat Jan 20 10:52:13 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 20 Jan 2007 15:52:13 GMT
Subject: OT Annoying Habits (Was: when format strings attack)
In-Reply-To: <7xirf2w8vi.fsf@ruckus.brouhaha.com>
References: <mailman.2917.1169243036.32031.python-list@python.org>
	<7xirf2w8vi.fsf@ruckus.brouhaha.com>
Message-ID: <NUqsh.300635$SM4.5981196@phobos.telenet-ops.be>

Paul Rubin schreef:
> No.  Top posting has always been an aberrance.  It first appeared in
> Usenet when Usenet (a word whose etymology comes from "Unix" and
> "network") started attracting Microsoft Windows users, who were in the
> habit of using Windows products that top-posted.  That happened fairly
> far along in Usenet's evolution

Yep. The time when things started to go wrong is sometimes pinpointed as 
september 1993 and referred to as "Eternal September" 
(http://en.wikipedia.org/wiki/Eternal_September).

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From bj_666 at gmx.net  Fri Jan 12 02:21:05 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 12 Jan 2007 08:21:05 +0100
Subject: Python nuube needs Unicode help
References: <1168550894.155528.295700@p59g2000hsd.googlegroups.com>
	<mailman.2600.1168552888.32031.python-list@python.org>
Message-ID: <pan.2007.01.12.07.21.04.79802@gmx.net>

In <mailman.2600.1168552888.32031.python-list at python.org>, Chris Mellon
wrote:

> On 11 Jan 2007 13:28:14 -0800, gheissenberger at gmail.com
> <gheissenberger at gmail.com> wrote:
>
>> <Utt id="3" transcribe="yes" audioRoot="A1"
>> audio="313-20070102144528.wav" grammarSet="G3" rawText="n&#227;o"
>> recValue="{data:CHOICE=NO;}" conf="970" rawText2="" conf2="0"
>> transcribedText="n&#227;o" parsableText="n&#227;o"/
>>
>> Clearly those "n&#227" are some non-Ascii characters, but how do I get
>> print to understand that?
>>
>> I keep getting:
>> "UnicodeEncodeError: 'ascii' codec can't encode character u'\xe3' in
>> position 40:
>>  ordinal not in range(128)"
>>
> 
> Find out what encoding the files are in and modify the script to use it.

The problem is not the encoding of the files as you see they are decoded
to unicode strings by the XML reading part already.

Ciao,
	Marc 'BlackJack' Rintsch


From steven.bethard at gmail.com  Fri Jan  5 22:08:42 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 05 Jan 2007 20:08:42 -0700
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
Message-ID: <NKWdnbpb-bcqjwLYnZ2dnUVZ_t-mnZ2d@comcast.com>

Stef Mientki wrote:
> Not sure I wrote the subject line correct,
> but the examples might explain if not clear
[snip]
> class pin2:
>   def __init__ (self, naam):
>     self.Name  = naam
> 
> aap2 = pin2('aap2')     # seems completely redundant to me.
> print aap2.Name

You can use class statements to create your instances with some 
metaclass trickery. Unlike normal assignments, class statements get 
access to the name being assigned. So you could write your class like::

     >>> class pin(object):
     ...     def __init__(self, name):
     ...         self.name = name
     ...     @classmethod
     ...     def from_class_block(cls, name, bases, block_dict):
     ...         return cls(name)
     ...

And then use class statements to create instances of the ``pin`` class::

     >>> class aap:
     ...     __metaclass__ = pin.from_class_block
     ...
     >>> print aap.name
     aap
     >>> type(aap)
     <class '__main__.pin'>

Of course, using class statements to create *instances* of a class is 
confusing. And it's more verbose than simply repeating the name when you 
call the constructor. But at least it avoids the redundancy. ;-)

STeVe


From oyekomova at hotmail.com  Tue Jan 16 20:33:30 2007
From: oyekomova at hotmail.com (oyekomova)
Date: 16 Jan 2007 17:33:30 -0800
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
In-Reply-To: <mailman.2740.1168894955.32031.python-list@python.org>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
	<eo78ah$dqc$1@sea.gmane.org>
	<mailman.2633.1168583356.32031.python-list@python.org>
	<1168715634.695961.14710@l53g2000cwa.googlegroups.com>
	<mailman.2740.1168894955.32031.python-list@python.org>
Message-ID: <1168997610.819891.173980@11g2000cwr.googlegroups.com>

Travis-
Yes, I tried your suggestion, but found that it took longer to read a
large file. Thanks for your help.



Travis E. Oliphant wrote:
> oyekomova wrote:
> > Thanks to everyone for their excellent suggestions. I was able to
> > acheive the following results with all your suggestions. However, I am
> > unable to cross file size of 6 million rows. I would appreciate any
> > helpful suggestions on avoiding memory errors. None of the solutions
> > posted was able to cross this limit.
>
> Did you try using numpy.fromfile ?
>
> This will not require you to allocate more memory than needed.   If you
> specify a count, it will also not have to re-allocate memory in blocks
> as the array size grows.
>
> It's limitation is that it is not a very sophisticated csv reader (it
> only understands a single separator (plus line-feeds are typically seen
> as a separator).
> 
> -Travis



From danielkleinad at gmail.com  Wed Jan 24 12:58:24 2007
From: danielkleinad at gmail.com (Daniel Klein)
Date: Wed, 24 Jan 2007 17:58:24 GMT
Subject: Python 2.5 and Zeus
Message-ID: <ef7fr25vg01cosgdbp5qruqsif3umbqolu@4ax.com>

Does anyone know if the Zeus IDE is compatible with Python 2.5?

I sent an email to Zeus a couple days ago but have not heard anything.

Thanks,
Dan


From Eugene.Antimirov at portaone.com  Mon Jan 22 06:09:34 2007
From: Eugene.Antimirov at portaone.com (Eugene Antimirov)
Date: Mon, 22 Jan 2007 13:09:34 +0200
Subject: newbie question
In-Reply-To: <45B490D0.8020809@portaone.com>
References: <618640.79082.qm@web7806.mail.in.yahoo.com>
	<45B490D0.8020809@portaone.com>
Message-ID: <45B49B6E.8040900@portaone.com>

Eugene Antimirov wrote:
> You've probably missed cursor.commit() ;)
Sorry, my bad:

conn.commit() is correct one AFAIR.


-- 
Sincerely,
Eugene Antimirov
PortaOne, Inc., SIP Support Engineer
support at portaone.com

* For further Billing and Technical information:
=> Please visit our website http://www.portaone.com
=> Please visit our forum http://forum.portaone.com

* Meet us at Internet Telephony Conference & Expo
* Ft. Lauderdale, FL - January 24-26, 2007 - Booth 1322
* http://www.tmcnet.com/voip/conference/



From fperez.net at gmail.com  Mon Jan  8 16:53:03 2007
From: fperez.net at gmail.com (Fernando Perez)
Date: Mon, 08 Jan 2007 14:53:03 -0700
Subject: Maybe a little bug of ipython 0.7.3 ?
References: <45A2620E.70103@gmail.com>
Message-ID: <enuefv$2qd$1@sea.gmane.org>

fdu.xiaojf at gmail.com wrote:

> I'm new to ipython, and i found it a very cool product.

Glad you like it, though in the future I recommend you post on the ipython
list.  I very rarely scan c.l.py these days, unfortunately.

> $ ipython
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)]
> Type "copyright", "credits" or "license" for more information.
> 
> IPython 0.7.3 -- An enhanced Interactive Python.
> <snip>
> 
> In [8]: a = range(1000)
> 
> In [9]: a?
> Type:           list
> Base Class:     <type 'list'>
> String Form:    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
> 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 <...> 0, 981, 98
> 2, 983, 984, 985, 986, 987, 988, 989, 990, 991, 992, 993, 994, 995, 996,
> 997, 998, 999]
> Namespace:      Interactive
> Length:         1000
> Docstring:
>     list() -> new list
> list(sequence) -> new list initialized from sequence's items
> 
> *Please note that there is an extra "0" after "**26 <...>", which
> doesn't appear for the followling cases:*

The 'foo?' feature just gives you a summary of information about an object,
and for very long strings, it truncates them in the center, printing only

head<...>tail

where head and tail are each about 100 characters long.

What you are seeing is just an accident of where the truncation happens,
that '0' is the last digit in 980 :)

Cheers,

f



From liuwensui at gmail.com  Mon Jan  1 13:56:19 2007
From: liuwensui at gmail.com (Wensui Liu)
Date: Mon, 1 Jan 2007 13:56:19 -0500
Subject: Wow, Python much faster than MatLab
In-Reply-To: <NGcmh.5542$hr3.1562@newsfe24.lga>
References: <mailman.2150.1167489669.32031.python-list@python.org>
	<NGcmh.5542$hr3.1562@newsfe24.lga>
Message-ID: <1115a2b00701011056l58bf9994w28ef7879fda0ad15@mail.gmail.com>

Gerry,

I have the similar background as yours, many years using SAS/R. Right
now I am trying to pick up python.

>From your point, is there anything that can be done with python easily
but not with SAS/R?

thanks for your insight.

wensui

On 1/1/07, gblais at cox.net <gblais at cox.net> wrote:
> We're not so far apart.
>
> I've used SAS or 25 years, and R/S-PLUS for 10.
>
> I think you've said it better than I did, though: R requires more attention
> (which is often needed).
>
> I certainly didn't mean that R crashed - just an indictment of how much I
> thought I was holding in my head.
>
> Gerry
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
WenSui Liu
A lousy statistician who happens to know a little programming
(http://spaces.msn.com/statcompute/blog)


From mtobis at gmail.com  Thu Jan  4 20:23:46 2007
From: mtobis at gmail.com (Michael Tobis)
Date: 4 Jan 2007 17:23:46 -0800
Subject: Turn off line wrap for lists?
In-Reply-To: <1167958863.538291.60820@s34g2000cwa.googlegroups.com>
References: <1167958863.538291.60820@s34g2000cwa.googlegroups.com>
Message-ID: <1167960226.076110.89340@42g2000cwt.googlegroups.com>


_ wrote:
> (I did google for this, I promise)
>
> How do I get python NOT to insert newlines into string representations
> of lists when I do something like this:
>
> strCollector += "%s" % (['a', 'list', 'with', 'lots', 'of', 'elements']
> * 100)

It shouldn't and doesn't insert newlines.

######
>>> strCollector = "%s" % (['a', 'list', 'with', 'lots', 'of', 'elements'] * 100)
>>> strCollector.split("\n")[0] == strCollector
True
######
mt



From mirandacascade at yahoo.com  Sat Jan  6 20:49:02 2007
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 6 Jan 2007 17:49:02 -0800
Subject: AES256 in PyCrypto
Message-ID: <1168134542.337448.261510@s34g2000cwa.googlegroups.com>

Attempting to determine whether the PyCrypto package has the capability
to perform AES256 encryption.  I received the following C# snippet:

CryptoProvider provider = new CryptoProvider();
Encrypted_Type password = new Encrypted_Type();
password.EncryptedData = new EncryptedDataType();
password.EncryptedData.EncryptionMethod = new EncryptionMethodType();
password.EncryptedData.EncryptionMethod.Algorithm = "AES256-cbc";

and I was told that it was the setup code for code that later on
performs AES256 encryption.  I'm assuming that setting the Algorithm
property is what informs the system as to the type of encryption to
perform.  I included the above snippet as a reference point, because
I'm attempting to understand how to do something equivalent in Python.

Would the following Python code perform AES256 encryption on plainText
from Crypto.Cipher  import AES
x = AES.new(a, AES.MODE_CBC, iv)
x.encrypt(plainText)

assuming:
a = the key value
iv = an initialization vector
?

If the above Python code does not perform AES256 encryption:
a) is there functionality within PyCrypto that allows one to perform
AES256 encryption?
b) if such functionality does not exist in PyCrypto, does it exist in
some other Python package?

Operating System: Windows XP
Vsn of Python: 2.4

Thank you.



From toto at titi.de  Sun Jan 21 18:18:38 2007
From: toto at titi.de (laurent rahuel)
Date: Mon, 22 Jan 2007 00:18:38 +0100
Subject: Python Windows Editors
In-Reply-To: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
Message-ID: <45b3f4fe$0$21144$7a628cd7@news.club-internet.fr>

Hi,

I guess you could take a look at pydev extension for eclipse and if you 
wan't an almost straight forward installation, you should consider this 
link :
http://www.easyeclipse.org/site/distributions/python.html

Regards,

Laurent

W. Watson a ?crit :
> I downloaded python-2.5.msi and installed it. I believe its editor is 
> IDE. I understand there's a Win editor called pythonwin. I believe it's 
> in the download pywin32-210.win32-py2.5.exe, but I'm not sure if this 
> exe file has just the editor or all of Python. Comments? If not how do I 
> get the PythonWin editor by itself?
> 
> BTW, one of the features I did not like of IDE is the limited file Print 
> command. It puts everything in 16pt type, and gives no choice over what 
> pages should be printed. Maybe there's an option?
> 
>          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
>              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
>               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet
> 
>                Two laws Newton and Einstein didn't discover:
>                  1. Time is money.
>                  2. Matter will be damaged in direct proportion
>                     to its value.


From paul.sijben at xs4all.nl  Wed Jan 10 06:42:01 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Wed, 10 Jan 2007 12:42:01 +0100
Subject: maximum number of threads
In-Reply-To: <mailman.2527.1168427522.32031.python-list@python.org>
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl>	<7.0.1.0.0.20070110064655.0508d0a0@yahoo.com.ar>
	<mailman.2527.1168427522.32031.python-list@python.org>
Message-ID: <45A4D109.809@xs4all.nl>

Felipe Almeida Lessa wrote:

> Maybe Stackless could help the OP?
> http://www.stackless.com/
> 

thanks I will look into it!


From kirby.urner at gmail.com  Sat Jan 13 22:17:16 2007
From: kirby.urner at gmail.com (kirby.urner at gmail.com)
Date: 13 Jan 2007 19:17:16 -0800
Subject: Draft Pycon Keynote (a simulation)
Message-ID: <1168744636.111293.292120@38g2000cwa.googlegroups.com>

[this revision supersedes what I posted to edu-sig
earlier today, a few typos fixed.  Note that I'm not
actually signed up for Pycon at this time, just using
it as an exercise to polish my rap.  All of the events,
persons and institutions mentioned herein are quite
real however].

===

Although I haven't been invited to keynote in Dallas --
although I did volunteer (given my considerable
experience) -- I thought a next best thing would be to
lead by example, and encourage other subscribers
to draft little keynotey things that would give us a
sense of the vision and/or mission and/or state
of our snake in our schools, so to speak.

I would cite my gigs with Saturday Academy of
Silicon Forest, both with the police (George Heuston
of HPD), and through Portland State, both outreaches
to youth somewhat at risk of corruption and/or losing
their way amidst a bewildering wilderness of mirrors.

At the police station (West Precinct) we harped
on the downside of the Internet, a haven for perps,
pervs and predators, especially adult, plus a
constant source of temptations, e.g. of pirated
goods, which might only serve to get you in trouble
with the authorities.

But George was uncomfortable with this sustained
negative note, all downsides and terrors, when boyz
and girlz just wanna have fun with all the new toyz,
so if there is *any* safe way to enjoy this bonanza,
maybe the police could role model it?

They brought in some hired guns:  me, of 4D Solutions,
and Jerritt Collord, then of linuxfund.org, and long time
veteran of North Portland's open source scene (I'm more
the old hippie, mostly cut my teeth on closed source
offerings in Southeast, am now just getting my second
wind, thanks in part to Free Geek and Ron Braithwaite).

Jerritt's take was decidely different from the more
negatory stuff.  He really knew his engineering, and if
packets weren't encrypted, and hogged the shared
public air, well then he, as a member of said public,
wasn't being all that sneaky or outside of his rights
if he just opened a few.

Sysadmins do the same, and know if wired or wireless
dorms use more Bittorrent than Jabber, and which
servers enjoy the most traffic.  The packets themselves
tend to tell you that, by design, as a part of the monitoring
infrastructure, which is needed to pinpoint bottlenecks,
as well as to cut down on hogging, abuse, taking unfair
advantage of resources we share.

So there we were, the first day of class, immediately
into sniffing packets, thinking about packets, where
they come from, where they go, what they do.  Enter
'Warriors of the Net', a great cartoon intro, and which
I highly recommend to school teachers in Texas, if at
all interested in what we in Oregon are into.

[pause to show excerpt, with big speaker surround
sound, however they do it in Texas
http://www.warriorsofthe.net/].

Anyway, the kids found this refreshing:  real hackers
hacking, not just lecturing on criminal pathologies.  George
sat in on a few classes and I think he could see where we
weren't just training up a new generation of law breakers.
We were showing off our hacker subculture as highly
ethical, and interested in sharing a growing stockpile of
wealth that we ourselves create.

We're not thieves.  We *own* our code *and* choose to
share it with peers.  That's the message to youngsters
in any case.  We want 'em to grow up proud of their
heritage.

You can grow up to become a freedom loving hacker
*and* be tough on crime, if that's what you'd like.  Be
like George for example, a computer forensics expert in
charge of many a crime scene investigation, lots of FBI
background. There's no contradiction here.

Jerritt and I forked off in different directions after that
class.  He had a girlfriend in Montana, no obvious ties
to Portland.  Last we met, he was thinking about Japan.

As a Portland native, I stuck with Saturday Academy
and plodded along in a more academic vein, working
in purer and purer forms of Python, with ever more
math in the mix, sometimes to the exclusion of all
else.  Group theory, number theory, synergetics...
burning the midnight oil.

I was losing my Jerrittish side, given he wasn't around
to reinforce it so directly.  I missed the power of our
HPD course, even though my more purist stuff got
me gigs at Europython in Gothenburg, at the London
Knowledge Lab, and as our BDFL's sidekick and
Minister of Education at that Shuttleworth summit
last April (I'm giving a talk on that meeting, check
your program).

[ pause to show excerpt of London Knowledge Lab
talk -- on second thought, I don't think it's high
rez enough.  For printed copy, see these relevant links:
http://worldgame.blogspot.com/2005/06/europython-2005.html
http://www.bfi.org/pythonicmathematics
]

Slowly, I've been building up that other side of my
body, to where I can talk about Internet protocols, the
stack, the heap, with some confidance and gusto.

Dr. Sonnenfeld of New Mexico Tech was inspiring, reminding
me of the relevance of the homespun, the down and dirty
(he studies lightning), the importance of coming down
from those mountain peaks on occasion.

Dr. Bob Fuller, veteran of the Calculus Reform movement
(largely successful) was likewise an inspiration, reminding
me not to get lost in the clouds, over lattes in Oregon.

This restored sense of balance gives my students more
insights into the likes of Twisted, into the nuts and bolts
of the Internet itself.  Plone... Zope.  I'm not being too
prejudicial in my teaching them Python, not even in
terms of their becoming computer scientists.  That's for
them to decide.  I'm just here to show 'em some ropes,
open some doors.

wxPython, ODBC to MySQL, IronPython, Mailman...
these all could be a "next step" for you, or maybe you're
ready to teach them?  We encourage peers teaching
peers in our models, already the most tried and trusted
vector for spreading a global geek culture.

My own "next step" has been in the direction of VPython
and its promise of easy OpenGL.  Like Arthur on Edu-Sig,
I see that Ruby is strong in this area, and Ruby toons
(animated cartoons by or about Ruby) may well eclipse
our snake's chances for more public exposure, if we don't
act in concert.  I'm thinking of rebranding my own
Hypertoons [tm] to 'Anime on Rails' and invading the
Japanese market, a pre-emptive strike.

[pause for audience laughter
Hypertoons: http://wiki.python.org/moin/HyperToons ]

Happily though, I think peaceful co-existence with
RubyToons is the most likely outcome, just like we
in Python Nation already enjoy good relations with
our closest long time neighbor, the Republic of Perl.

Now, I know you're all wondering about YouTube and
Google, and how this all fits with Intel's Viiv.  I'd say,
on behalf of the Portland Knowledge Lab, that yes,
the goal is open source, lots and lots of it, so you can
download and splice stuff together with wild abandon,
not feeling encumbered by the prospect of lawsuits
left and right, because of the blanketly permissive
copyrights and licenses we'll be providing as shielding.

In this way, our ability to cut and paste video, as easily
as we cut and paste source code, will grow by leaps
and bounds, to the great advantage of a knowledge
based economy such as our own, wherein screencasting,
including mathcasting, is an essential ingredient in
building up the alphanumeracy skills of our future
workforce.

However, YouTube and Google Video aren't currently
high rez enough to make looking at source code anything
but painful.  So the challenge is to develop a multi-tiered
system of video distribution, and yes, the higher the
bandwidth the more likely it'll end up costing you
something, if not in terms of actual dollars, then in
terms of disk space or rebranding rights.  Great works
of art (like Valve's Half Life, like Cyan's Uru) still don't
come cheaply, and we're happy to pay for it, by and
large, including sometimes through Foundation support
of the artists.

How will Python fit in to our open source video economy?
At least one thing is clear:  it'll be a lot easier to teach
effectively, as will be the other languages.

The rest is up to the developers and/or curriculum writers
(not always different people).

If you like our snake, and want to build in some bindings to
your product, open source or proprietary, we hope you'll
seriously consider doing so and follow through.  Python, like
any language, benefits from brand loyalty.  Guido has never
insulted our intelligence with a second rate offering.  Our
goal should be to continue his most excellent track record.

Thank you and good afternoon.

Kirby



From gagsl-py at yahoo.com.ar  Wed Jan 24 12:47:16 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 24 Jan 2007 14:47:16 -0300
Subject: smtplib starttls gmail example - comments?
In-Reply-To: <fca207170701240412o1945fcedtc59257ff02bca9dc@mail.gmail.co
 m>
References: <W63698683.410.134.1@mxextra>
	<9afea2ac0701240256kae247b3s666be6529362c84e@mail.gmail.com>
	<fca207170701240412o1945fcedtc59257ff02bca9dc@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070124144251.05aeb830@yahoo.com.ar>

At Wednesday 24/1/2007 09:12, BJ Swope wrote:

>Both examples have included the cardinal sin in smtp...
>
>They both send the message text followed by new line dot new line.
>
>The smtp protocol specifically mentions CRLF dot CRLF.   Please 
>please please use \r\n.\r\n in your code...

No. The SMTP object takes care of proper message ending (as it 
should). If you append \r\n.\r\n to the message, or whatever, that 
will be correctly quoted and sent as part of the message.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From jhefferon at smcvt.edu  Tue Jan 30 08:07:39 2007
From: jhefferon at smcvt.edu (Jim)
Date: 30 Jan 2007 05:07:39 -0800
Subject: error messages containing unicode
In-Reply-To: <528sn0F1nhkoiU1@mid.uni-berlin.de>
References: <1170122515.980168.150960@p10g2000cwp.googlegroups.com>
	<pan.2007.01.30.02.48.10.853852@REMOVEME.cybersource.com.au>
	<1170160464.576122.62230@h3g2000cwc.googlegroups.com>
	<528sn0F1nhkoiU1@mid.uni-berlin.de>
Message-ID: <1170162459.577853.282090@l53g2000cwa.googlegroups.com>

On Jan 30, 7:41 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> >> (2) convert the file name to ASCII before you store it; or
> > I need the non-ascii information, though, which is why I included it
> > in the error message.
> Then convert it to utf-8, or some encoding you know it will be used by your
> terminal.
Thank you for the suggestion.   Remember please that I am asking for a 
safe way to pull the unicode object from the exception object (derived 
from a Python built-in), so I can't store it as unicode first and then 
convert to regular string  when I need to print it out-- my exact 
question is how to get the unicode.  So I take your answer to be to 
refuse to put in a unicode-not-ascii in there in the first place.

It then seems to me that you are saying that the best practice is that 
every function definition should contain a parameter, like so.

  def openNewFile(fn,errorEncoding='utf-8'):
       :
      try:
           open(fn,'r')
      except Exception, err
           raise myException 'unable to open 
'+fn.encode(errorEncoding,'replace')

I guess that beyond that passing those parameters and putting encode 
on every variable in my routines that occurs in an error message it is 
ugly, it seems to me that it violates the principle that you should do 
everything inside the program in unicode and only encode at the 
instant you need the output, in that the exception object is carrying 
around an ascii-not-unicode object.

Jim



From kylotan at gmail.com  Mon Jan  8 11:04:27 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 8 Jan 2007 08:04:27 -0800
Subject: creating simple Python scripting interfaces via C++
Message-ID: <1168272267.679069.325890@38g2000cwa.googlegroups.com>

I have Python embedded in a C++ application (yes, yes, I know, I'd
prefer it the other way around too) and essentially need to expose some
read-only values and functions to Python so it can be used to script
the host application.

When scripting a similar app in TCL, it's possible to associate each
command with some client data, so that the command can be written in
the script as a free function but it actually executes in some sort of
context, accessed via the client data pointer in C++. In Python, there
doesn't appear to be this mechanism, so I think I'd have to inject the
context in another way, either as some sort of module-level global, or
as an object, implementing the previously free functions as methods.

Is this correct? If so, what is the simplest way of implementing the
former method - inserting the pointer to the required context as a long
(via PyDict_SetItemString(globals, "context", PyInt_FromLong(pointer))
or similar) and then converting it back in the bound function? And for
the latter method, is it possible to make an arbitrary object and then
attach methods and the context data? Or will I have to create a whole
Python class for this (as in
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/54352)?

I'm not interested in wrapping whole C++ objects at this stage, and
libraries like Boost::Python aren't currently an option. I just need a
few pointers on doing it the low-level way for now.

-- 
Ben Sizer



From http  Thu Jan 11 01:25:44 2007
From: http (Paul Rubin)
Date: 10 Jan 2007 22:25:44 -0800
Subject: Is there a way to protect a piece of critical code?
References: <mailman.2524.1168424917.32031.python-list@python.org>
	<eo2pgf$j57$1@news.albasani.net>
	<mailman.2558.1168494787.32031.python-list@python.org>
Message-ID: <7xzm8q6pw7.fsf@ruckus.brouhaha.com>

"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
> am aware of Queue module - the same app uses it for something else.
> I dont like too many try -- excepts in the code - I find they confuse
> me when I try to read it later - and in this case I cannot block on waiting for
> the queue to fill.

Do you have multiple threads reading from the same queue?  If not then
you can use queue.empty() to see whether the queue is empty.  If yes,
queue.empty isn't reliable (it can return nonempty, and then another
thread empties out the queue before you get a chance to read it).  But
you could always wrap the queue:

    QUEUE_IS_EMPTY = object()   # global sentinel

    def get_from_queue(queue):
       try:
          return queue.get(block=False)
       except Queue.Empty:
          return QUEUE_IS_EMPTY

Maybe it's worth adding a method like that to the Queue module in the stdlib.


From skip at pobox.com  Sun Jan  7 14:34:58 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 7 Jan 2007 13:34:58 -0600
Subject: strange for loop construct
In-Reply-To: <1168193206.598957.257700@38g2000cwa.googlegroups.com>
References: <1168029548.217679.251230@q40g2000cwq.googlegroups.com>
	<mailman.2347.1168030198.32031.python-list@python.org>
	<12ptf5bl21f2teb@corp.supernews.com>
	<1168193206.598957.257700@38g2000cwa.googlegroups.com>
Message-ID: <17825.19298.34385.363481@montanaro.dyndns.org>

    Gabriel> Where do you find the "What's new" for previous releases? I
    Gabriel> have to read them online.

Google for

    what's new site:python.org

Skip


From gordyt at gmail.com  Thu Jan 18 17:07:06 2007
From: gordyt at gmail.com (gordyt)
Date: 18 Jan 2007 14:07:06 -0800
Subject: import vs. subdirectory search
In-Reply-To: <45AED511.8090307@animats.com>
References: <45AED511.8090307@animats.com>
Message-ID: <1169158026.677285.165340@11g2000cwr.googlegroups.com>

John try this:

from M2Crypto import SSL

That should put your SSL module in the namespace as you want.

--gordy



From jjl at pobox.com  Thu Jan  4 15:57:05 2007
From: jjl at pobox.com (John J. Lee)
Date: Thu, 04 Jan 2007 20:57:05 GMT
Subject: When argparse will be in the python standard installation
References: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>
	<459C008D.5040404@v.loewis.de>
	<H-ydneqpW-axgAHYnZ2dnUVZ_qWvnZ2d@comcast.com>
	<459CBAC8.9060007@v.loewis.de>
	<64mdnTE_-5Ff3gDYnZ2dnUVZ_q6vnZ2d@comcast.com>
Message-ID: <87d55u7bp7.fsf@pobox.com>

Steven Bethard <steven.bethard at gmail.com> writes:

> Martin v. L?wis wrote:
> > Steven Bethard schrieb:
> >> If someone has an idea how to include argparse features into optparse,
> >> I'm certainly all for it. But I tried and failed to do this myself, so I
> >> don't know how to go about it.
> > It's not necessary that the implementation is retained, only that the
> > interface is preserved. So if you can come up with an implementation
> > that supports all optparse applications, and adds the additional
> > features, your implementation could replace the current optparse.
> > If you need to make incompatible changes, it would be best if you
> > could produce a list of such changes, so that optparse users can
> > review them to find out whether they are affected.
> 
> FWIW, here's a short list of issues that could be easily addressed:
> 
> * alias ArgumentParser to OptionParser
[...snip long list of proposed aliases and additions...]

> Some slightly harder issues:
[...]

You propose here to attempt to merge optparse and argparse into a
single interface (single class, by the sound of it).

I stopped reading after a bit, but at least up to that point, all of
these issues could (and certainly should, if argparse is added to the
stdlib, even in Python 3) be addressed by instead providing both
OptionParser and an OptsAndArgsParser class (or whatever you'd call
the latter).  OptionParser would then support exactly the current
optparse.OptionParser interface.  OptsAndArgsProcessor would support
your new interface.  Presumably most of the actual implementation code
would be shared.


John


From bruno.desthuilliers at websiteburo.com  Tue Jan  9 03:20:11 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Tue, 09 Jan 2007 09:20:11 +0100
Subject: private variables
In-Reply-To: <mailman.2463.1168321669.32031.python-list@python.org>
References: <mailman.2463.1168321669.32031.python-list@python.org>
Message-ID: <45a35032$0$319$426a34cc@news.free.fr>

belinda thom a ?crit :
> Hello,
> 
> In what version of python were private variables added?

Which private variables ?


From bdesth.quelquechose at free.quelquepart.fr  Sun Jan  7 12:56:46 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 07 Jan 2007 18:56:46 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <7xmz4v11jq.fsf@ruckus.brouhaha.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
Message-ID: <45a12e20$0$300$426a74cc@news.free.fr>

Paul Rubin a ?crit :
> "Felipe Almeida Lessa" <felipe.lessa at gmail.com> writes:
> 
>>What is the chance of having to inherit from two classes from
>>different modules but with exactly the same name *and* the same
>>instance variable name?
>>
>>Of course you're being very pessimistic or extremely unlucky.
> 
> 
> If you want to write bug-free code, pessimism is the name of the game.

Not to pretend my own code is always totally bug-free, but I found that, 
with languages like Python, I usually got better results starting with 
the simplest possible implementation, and only then adding some 
'defensive' boilerplate where it makes sens (that is mostly resources 
acquisition/release) - an approach that I would certainly not advocate 
when it comes to coding in C...


From nszabolcs at gmail.com  Mon Jan 29 18:09:29 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 29 Jan 2007 15:09:29 -0800
Subject: [Boost.Graph] graph.vertices property creates new objects
In-Reply-To: <1170095798.778605.30310@q2g2000cwa.googlegroups.com>
References: <1170095798.778605.30310@q2g2000cwa.googlegroups.com>
Message-ID: <1170112169.645867.326130@j27g2000cwj.googlegroups.com>

> It seems that the vertices iterator creates new vertex objects every
> time instead of iterating over the existing ones. This essentially

i don't know much about bgl, but this is possible since vertices are 
most likely not stored as python objects inside boost

> prevents, among other things, storing vertices as keys in a dictionary
> since the hashes of the stored and the new vertex differ although they
> compare equal. Is this really what's happening, and if so, why ?

that sounds bad, fortunately __hash__ can be overriden so even if id() 
differs hash() can be the same for the same vertex.
if __hash__ is not handled then it's a bug in bgl imho.



From wolf_tracks at invalid.com  Sun Jan 21 15:32:21 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sun, 21 Jan 2007 20:32:21 GMT
Subject: Python Windows Editors
Message-ID: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>

I downloaded python-2.5.msi and installed it. I believe its editor is IDE. I 
understand there's a Win editor called pythonwin. I believe it's in the 
download pywin32-210.win32-py2.5.exe, but I'm not sure if this exe file has 
just the editor or all of Python. Comments? If not how do I get the 
PythonWin editor by itself?

BTW, one of the features I did not like of IDE is the limited file Print 
command. It puts everything in 16pt type, and gives no choice over what 
pages should be printed. Maybe there's an option?

          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

                Two laws Newton and Einstein didn't discover:
                  1. Time is money.
                  2. Matter will be damaged in direct proportion
                     to its value.
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From 12cc104 at gmail.com  Mon Jan  8 02:57:00 2007
From: 12cc104 at gmail.com (proctor)
Date: 7 Jan 2007 23:57:00 -0800
Subject: regex question
References: <1168232001.377605.236270@11g2000cwr.googlegroups.com>
	<45a1f0c6$0$18929$4c368faf@roadrunner.com>
Message-ID: <1168243020.304940.212700@42g2000cwt.googlegroups.com>


Paul McGuire wrote:
> "proctor" <12cc104 at gmail.com> wrote in message
> news:<1168232001.377605.236270 at 11g2000cwr.googlegroups.com>...
> > hello,
> >
> > i hope this is the correct place...
> >
> > i have an issue with some regex code i wonder if you have any insight:
> >
> > ================
>
> There's nothing actually *wrong* wth your regex.  The problem is your
> misunderstanding of raw string notation.  In building up your regex, do not
> start the string with "r'" and end it with a "'".
>
> def makeRE(w):
>     print w + " length = " + str(len(w))
>     # reString = "r'" + w[:1]
>     reString = w[:1]
>     w = w[1:]
>     if len(w) > 0:
>         for c in (w):
>             reString += "|" + c
>         # reString += "'"
>     print "reString = " + reString
>     return reString
>
> Or even better:
>
> def makeRE(w):
>     print w + " length = " + str(len(w))
>     reString = "|".join(list(w))
>     return reString
>
> Raw string notation is intended to be used when the string literal is in
> your Python code itself, for example, this is a typical use for raw strings:
>
> ipAddrRe = r'\d{1,3}(\.\d{1,3}){3}'
>
> If I didn't have raw string notation to use, I'd have to double up all the
> backslashes, as:
>
> ipAddrRe = '\\d{1,3}(\\.\\d{1,3}){3}'
>
> But no matter which way I create the string, it does not actually start with
> "r'" and end with "'", those are just notations for literals that are part
> of your Python source.
>
> Does this give you a better idea of what is happening?
>
> -- Paul

yes!  thanks so much.

it does work now...however, one more question:  when i type:

rx_a = re.compile(r'a|b|c')
it works correctly!

shouldn't:
rx_a = re.compile(makeRE(test))
give the same result since makeRE(test)) returns the string "r'a|b|c'"

are you saying that the "r'" and "'" are being interpreted differently
in the second case than in the first?  if so, how would i go about
using raw string notation in such a circumstance (perhaps if i need to
escape "\b" or the like)?  do i have to double up in this case?

proctor.



From not at set.se  Thu Jan 25 15:43:43 2007
From: not at set.se (Daniel)
Date: Thu, 25 Jan 2007 21:43:43 +0100
Subject: running applications in python
References: <1169746124.376610.139420@13g2000cwe.googlegroups.com>
Message-ID: <epb4pg$gu7$1@aioe.org>

2007-01-25 18:28:44
lee <libintr at gmail.com> wrote in message
<1169746124.376610.139420 at 13g2000cwe.googlegroups.com>

> how can i run or open a windows application from the python 
prompt?for
> e.g.mediaplayer opening,folder acess etc

Here's another way of doing it:
import os 
TheCommandIwantTorun = '"C:\Program\Windows Media Player\wmplayer.
exe"' #saves the command to a string 
os.system(TheCommandIwantTorun) #runs TheCommandIwantTorun in the 
command prompt (windows)


From deets at nospam.web.de  Wed Jan 17 12:03:26 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 17 Jan 2007 18:03:26 +0100
Subject: predefined empty base class ??
References: <1169053011.399278.290980@a75g2000cwd.googlegroups.com>
Message-ID: <51736uF1icq18U1@mid.uni-berlin.de>

> is there an predefined empty base class
> which I can instanziate to have an
> container i can copy attributes in?

No, but you can always do 

class Foo(object):
   pass

foo = Foo()

foo.attribute = value

Diez


From horpner at yahoo.com  Wed Jan 24 16:08:27 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 24 Jan 2007 21:08:27 GMT
Subject: Static variables
References: <ep8gkl$g7v$3@news.in.tum.de>
Message-ID: <fVPth.1713$G23.1170@newsreading01.news.tds.net>

On 2007-01-24, Florian Lindner <Florian.Lindner at xgm.de> wrote:
> does python have static variables? I mean function-local
> variables that keep their state between invocations of the
> function.

Yup.  Here's a nice way. I don't how recent your Python must be
to support this, though.

>>> def foo(x):
...   print foo.static_n, x
...   foo.static_n += 1
...
>>> foo.static_n = 0
>>> for i in range(5):
...   foo("?")
...
0 ?
1 ?
2 ?
3 ?
4 ?

If you need to use an earlier version, then a "boxed" value
stored as a keyword parameter will also work.

>>> def foo(x, s=[0]):
...   print s[0], x
...   s[0] += 1
...
>>> for i in range(5):
...   foo("!")
...
0 !
1 !
2 !
3 !
4 !

The latter is not as nice, since your "static" variable is easy
to clobber by passing something into the function.

-- 
Neil Cerutti


From vithi99 at hotmail.com  Wed Jan 31 20:17:10 2007
From: vithi99 at hotmail.com (vithi)
Date: 31 Jan 2007 17:17:10 -0800
Subject: win32com.client
In-Reply-To: <mailman.3371.1170279963.32031.python-list@python.org>
References: <1170278964.738118.219600@k78g2000cwa.googlegroups.com>
	<mailman.3371.1170279963.32031.python-list@python.org>
Message-ID: <1170292629.986774.88240@a34g2000cwb.googlegroups.com>

This is not I was looking for. There is a module call
"win32com.client" in python some people used it If any body know about
it let me know.

On Jan 31, 1:45 pm, Gary Herron <gher... at islandtraining.com> wrote:
> vithi wrote:
> > Hi
> > Any one tell me where I can get (or download) python modules win32com
> > or win32com.client because I have to use "Dispatch"  thanks
>
> You want the "python for windows" extension, available from
>  http://sourceforge.net/projects/pywin32/
>
> Gary Herron




From gagsl-py at yahoo.com.ar  Thu Jan 11 21:57:11 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 23:57:11 -0300
Subject: RotatingFileHandler + subprocess module problems
In-Reply-To: <7a9c25c20701111059q1186377nde4021eaf768d345@mail.gmail.com
 >
References: <7a9c25c20701111059q1186377nde4021eaf768d345@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070111231652.05977e10@yahoo.com.ar>

At Thursday 11/1/2007 15:59, Stephen Hansen wrote:

>If I run app1, and then app2, it all works fine. Specifically, the 
>apps are logging correctly and I can see with Process Explorer that 
>each has a handle to the appropriate files.
>
>However, I have a setting to make App2 run App1 in the background 
>for convienance. This is using the subprocess module. When this 
>setting is on, App2 will die horribly the first time that the 
>doRollover comes along: specifically it gets a permission denied 
>error when it tries to rename App2.log to App2.log.1
>
>After doing some debugging, it appears that App1 (if started by App2 
>using the subprocess module) has a handle to App2.log /somehow/. It 
>never starts it, or touches it (verified through debug messages), 
>but seems to inherit it.

That's subprocess fault. You menctioned Process Explorer, it appears 
you're using Windows.
Using subprocess, the child process always inherits all file handles 
from its parent. This may or may not be desirable, and in your case, 
it's not. App1 inherits the open file handle to App2.log.
Inside subprocess.py, near line 789, there is a call to 
CreateProcess; its 5th parameter is called bInheritHandles and it's 
set to 1. The comment "must inherit handles to pass std handles" is 
wrong AFAIK, and setting STARTF_USESTDHANDLES in startupinfo   should 
be enough. (It may be that some lines above, STARTF_USESTDHANDLES is 
not correctly set).
I'll try to investigate a bit more and file a bug report or a patch.
In the meantime, you could replace that 1 in CreateProcess by a 0. 
Specially if you don't use PIPE or redirects, your problem should go away.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From jeffrey at fro.man  Wed Jan 31 10:56:56 2007
From: jeffrey at fro.man (Jeffrey Froman)
Date: Wed, 31 Jan 2007 07:56:56 -0800
Subject: another newbie question: why should you use "*args" ?
References: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
	<mailman.3346.1170254361.32031.python-list@python.org>
	<4b4a3$45c0b94c$83aef404$20934@news1.tudelft.nl>
Message-ID: <12s1f2ahudim196@corp.supernews.com>

stef wrote:

>> And one note more. Just to be more pythonic you shouldn't use form
>> range(len(blabla)). Instead use:
>>
>> for i in list:
>> ....blabla...
>>
>>
> I would love that,
> but please tell me how (I need an integer counter for something else too):

for index, item in enumerate(args):
    ...


Jeffrey


From bill.scherer at verizonwireless.com  Tue Jan 16 10:40:01 2007
From: bill.scherer at verizonwireless.com (Bill Scherer)
Date: Tue, 16 Jan 2007 10:40:01 -0500
Subject: Search Queue
In-Reply-To: <NYOBGCEXSMTP22hxLjC000713ee@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com>
References: <NYOBGCEXSMTP22hxLjC000713ee@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com>
Message-ID: <45ACF1D1.8090904@verizonwireless.com>

abcd wrote:

>I have a class such as...
>
>id = 0
>class Foo:
>    def __init__(self, data):
>        self.id = id
>        id += 1
>        self.data = data
>
>And I am storing them in a Queue.Queue...
>
>import Queue
>q = Queue.Queue()
>q.put(Foo('blah'))
>q.put(Foo('hello world'))
>q.put(Foo('test'))
>
>how can I search "q" for an instance of Foo which has 'id' equal to say
>2?  Typically a queue only lets you put and get, not really search.
>
>Thanks.
>
>  
>
You could iterate through q.queue. Something like:

for instance in q.queue:
    if instance.id == 2:
        print 'found it!"


But, you mess around with the internals of a Queue instance at your own 
peril!




From rrr at ronadam.com  Mon Jan 15 22:01:35 2007
From: rrr at ronadam.com (Ron Adam)
Date: Mon, 15 Jan 2007 21:01:35 -0600
Subject: assert versus print [was Re: The curious behavior of integer
	objects]
In-Reply-To: <76fd5acf0701151838l1a724be5n3f1e1fda629d1464@mail.gmail.com>
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>	<mailman.2744.1168901460.32031.python-list@python.org>	<pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>
	<76fd5acf0701151838l1a724be5n3f1e1fda629d1464@mail.gmail.com>
Message-ID: <eohfet$k9i$1@sea.gmane.org>

Calvin Spealman wrote:
> On 1/15/07, Steven D'Aprano <steve at removeme.cybersource.com.au> wrote:
>> On Mon, 15 Jan 2007 17:50:56 -0500, Calvin Spealman wrote:
>>
>>> assert foo(0x10) == 0  # Assertions are much better tests than prints :-)
>> I dispute that assertion (pun intended).
> 
> Hah!
> 
>> Firstly, print statements work even if you pass the -O (optimize) flag
>> to Python. Your asserts don't.
> 
> This is true, but the concept can be adapted to a things like an
> assert_() function.
> 
>> Secondly, a bare assertion like that gives you very little information: it
>> just tells you that it failed:
>>
>>>>> x = 1
>>>>> assert x == 0
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> AssertionError
>>
>> To provide the same information that print provides, you need something
>> like this:
>>
>> assert x == 0, "x == %s not 0" % x
> 
> What information would I need to know if my test passed? Nothing, I
> say. I only want to know when the tests fail, especially as I add more
> of them. Having no output is a great way to know nothing puked.
> 
>> Thirdly, and most importantly, assert and print aren't alternatives,
>> but complementary tools. Assertions are good for automated testing and
>> simple data validation, where you already know what values you should
>> have. Printing is good for interactively exploring your data when you're
>> uncertain about the values you might get: sometimes it is hard to know
>> what you should be asserting until you've seen what results your function
>> returns.
> 
> True, but I intended my statement as a nudge towards more proper
> testing. Even when testing things out, I often use an assert rather
> than a print, to verify some condition.

There have been times where I would like assert to be a little more assertive 
than it is.  :-)

ie.. not being able to turn them off with the -0/-00 switches, and having them 
generate a more verbose traceback.

Maybe have an alternative 'warn' as an alternative debugging version that could 
be set to ignore, soft (print to log), and hard (raise an error).

An assert statement is a little clearer than an if...raise... in cases where you 
want to raise a value exception of some type.  But I'm probably in the minority 
on this one.

Ron


















From Thomas.Ploch at gmx.net  Fri Jan  5 12:47:48 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Fri, 05 Jan 2007 18:47:48 +0100
Subject: Dividing integers...Convert to float first?
In-Reply-To: <459E8C77.3020603@rpath.com>
References: <1168017342.255981.134400@11g2000cwr.googlegroups.com>
	<459E8B5C.6020804@gmx.net> <459E8C77.3020603@rpath.com>
Message-ID: <459E8F44.5090209@gmx.net>

Jonathan Smith schrieb:
> Thomas Ploch wrote:
>> redefined.horizons at gmail.com schrieb:
>>> I'm still pretty new to Python. I'm writing a function that accepts
>>> thre integers as arguments. I need to divide the first integer by te
>>> second integer, and get a float as a result. I don't want the caller of
>>> the function to have to pass floats instead of integers. How do I
>>> convert the arguments passed to the function into floats before I do
>>> the division? Is this necessary, or is their a better way?
>>>
>>> Thanks,
>>>
>>> Scott Huey
>>>
>>
>> Yes, it is necessary. If you divide two integers, the result will be an
>> integer.
>>
>>  >>> 1/2
>>  0
>>
>> You need the function float() -> float because a division between
>> integers and floats will have floats as their results
>>
>>  >>> float(1)/2
>>  0.5
> 
> 
>>>> from __future__ import division
>>>> 1/2
> 0.5
> 
> -smithj
> 

aahh, I have been tought so many things about python that are actually
so old, that I am starting to feel embarrassed.

That brings me to the point, that learning a language X at university
always brings you to a point where you know (almost) everything, but in
reality know nothing because course material is too old...

Thomas


From duncan.booth at invalid.invalid  Sun Jan  7 14:34:04 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 Jan 2007 19:34:04 GMT
Subject: urlib.quote gives KeyError in Python 2.4.4 but workin 2.3.5
References: <1168195697.483795.71160@38g2000cwa.googlegroups.com>
Message-ID: <Xns98B1C7036E87Dduncanbooth@127.0.0.1>

"nyenyec" <nyenyec at gmail.com> wrote:

> but it seems to work in Python 2.3.5
> 
> Python 2.3.5 (#1, Aug 19 2006, 21:31:42)
> [GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import sys, urllib
>>>> print sys.version
> 2.3.5 (#1, Aug 19 2006, 21:31:42)
> [GCC 4.0.1 (Apple Computer, Inc. build 5363)]
>>>> urllib.quote(u'\xe9')
> '%E9'

'seems to' is correct: it should *probably* have given you '%C3%E9'.

> 
> Is this a known bug?
> 
> What's the workaround?

UTF-8 encode the url before quoting it.

*Some* web servers may not expect utf-8 encoding. utf-8 is the recommended 
encoding, but unfortunately it isn't actually required, so a few (mostly 
old) servers may expect something else. If so, use the appropriate encoding 
for the server.


From ricli576 at student.liu.se  Sat Jan 20 01:57:37 2007
From: ricli576 at student.liu.se (Rickard Lindberg)
Date: 19 Jan 2007 22:57:37 -0800
Subject: Match 2 words in a line of file
In-Reply-To: <e3u1r25m8pnjfufna41lu4tjvq1uspeh3o@4ax.com>
References: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
	<1169166223.073714.109620@51g2000cwl.googlegroups.com>
	<1169172293.938820.103400@51g2000cwl.googlegroups.com>
	<1169172954.107365.133950@51g2000cwl.googlegroups.com>
	<1169175299.490994.244700@51g2000cwl.googlegroups.com>
	<e3u1r25m8pnjfufna41lu4tjvq1uspeh3o@4ax.com>
Message-ID: <1169276257.512909.92380@v45g2000cwv.googlegroups.com>

Daniel Klein wrote:

> 2) This can be resolved with
>
> templine = ' ' + line + ' '
> if ' ' + word1 + ' ' in templine and ' ' + word2 + ' ' in templine:

But then you will still have a problem to match the word "foo" in a
string like "bar (foo)".



From skip at pobox.com  Tue Jan 30 15:03:51 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 30 Jan 2007 14:03:51 -0600
Subject: MoinMoin
In-Reply-To: <3b8vr2tj0nc2hra616pm96m2turqm0v0vg@4ax.com>
References: <3b8vr2tj0nc2hra616pm96m2turqm0v0vg@4ax.com>
Message-ID: <17855.42151.790841.792538@montanaro.dyndns.org>


    Dan> Is it fair game to ask questions about MoinMoin here?
    Dan> If not, can someone recommend a resource please?

Yes, however moin-user at lists.sourceforge.net will probably yield more
responses:

    https://lists.sourceforge.net/lists/listinfo/moin-user

I've had problems getting my posts to appear there recently though.  I've
been using the gmane interface instead:

    http://dir.gmane.org/gmane.comp.web.wiki.moin.general

Skip



From letezo at fw.hu  Wed Jan 31 04:15:25 2007
From: letezo at fw.hu (=?iso-8859-2?q?L=E9tez=F5?=)
Date: Wed, 31 Jan 2007 10:15:25 +0100
Subject: Retrieve keywords a internet domain name
In-Reply-To: <1170233775.215834.14340@a34g2000cwb.googlegroups.com>
References: <1170233775.215834.14340@a34g2000cwb.googlegroups.com>
Message-ID: <200701311015.25453.letezo@fw.hu>

> Also, does anyone know where I can find a decent dictionary that I can
> use to verify if a word is a valid English word?

Debian packages such as openoffice, ispell, aspell may contain a word list. 
You can search google for +english +"word list" or something similar.

Viktor


From rubbish at jabnet.uk.com  Wed Jan 31 12:05:17 2007
From: rubbish at jabnet.uk.com (Stew Pid)
Date: Wed, 31 Jan 2007 17:05:17 +0000
Subject: What is the dummy statement that do nothing in Python?
References: <epqhre$qtp$1@netnews.upenn.edu>
Message-ID: <pan.2007.01.31.17.05.10.765277@jabnet.uk.com>

On Wed, 31 Jan 2007 11:49:53 -0500, Dongsheng Ruan wrote:

> I remember that in python there is some kind of dummy statement that just 
> holds space and does nothing.
> 
> I want it to hold the place after a something like if a>b: do nothing
> 
> I can't just leave the space blank after if statement because there will be 
> error message.
> 
> Does anybody know what to insert there?
> 
> Thanks!

pass



From horpner at yahoo.com  Tue Jan 23 11:46:48 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 23 Jan 2007 16:46:48 GMT
Subject: match nested parenthesis
References: <1169521381.814119.27020@11g2000cwr.googlegroups.com>
Message-ID: <slrnerci9b.r4.horpner@FIAD06.norwich.edu>

On 2007-01-23, s99999999s2003 at yahoo.com <s99999999s2003 at yahoo.com> wrote:
> hi
> i wish to find an reg exp for matching nested parenthesis of
> varying level like
> string =

It is not possible, because the set of strings containing
balanced parenthesis is not regular. Python re's aren't *really*
regular expressions, so you might be able to hack something up
using extensions (I'm not sure if it's been proven that you
can'). I believe regexes are the wrong tool for the job.

> "somewords1(words(somewords2)-(some(some)words3)somestuff)somestuff"
> and be able to evaluate the pair starting from the inner
> most(the deepest level) , ie (some) up till the outer most.
> What is a good reg exp to do this? or is simple string
> manipulations enough? 

Write a context free grammar and a recognizer for that grammar,
instead. Python developers haven't been able to agree on any such
module to include in the standard distribution yet,
unfortunately. But fortunately (consequently), there are tons of
nice parser and scanner generators available on the net. Try
pyparsing for a start, as it's a recent, maintained package with
excellent support on this group at the moment.

Or just compose your own little function by hand. A stack-based
solution (implemented using a list as a stack) should be easy enough.

-- 
Neil Cerutti
And now the sequence of events in no particular order. --Dan Rather

-- 
Posted via a free Usenet account from http://www.teranews.com



From svenrech at gmx.de  Thu Jan 18 08:29:56 2007
From: svenrech at gmx.de (Sven Rech)
Date: Thu, 18 Jan 2007 14:29:56 +0100
Subject: python embedding and threads
Message-ID: <45AF7654.1030509@gmx.de>

Hi,

I'm the author of an application written in C, which should now be 
extended with a python plugin system.
It already works very good, but I now have a problem:
Threading functionality within the python modules, that my C app loads 
and calls, doesn't work. This means, the threads do not run (the same 
python code works correct if I just start it with the normal python 
interpreter).


Is there something I must be aware of, if I want to use (python) threads 
with embedded python? (for example call a special function or something 
like that)

Bye


From pwatson at redlinepy.com  Tue Jan 30 18:09:58 2007
From: pwatson at redlinepy.com (Paul Watson)
Date: Tue, 30 Jan 2007 17:09:58 -0600
Subject: PythonCard
In-Reply-To: <1170193549.583822.156450@k78g2000cwa.googlegroups.com>
References: <1170193549.583822.156450@k78g2000cwa.googlegroups.com>
Message-ID: <52a1i6F1np2dcU1@mid.individual.net>

Tequila wrote:
> I'm having some trouble starting PythonCard on my PC.
> 
> I've downloaded and ran python-2.5.msi to install Python on my 
> machine.  And PythonCard-0.8.2.win32.exe to install PythonCard.
> 
> When I try to run the program I get the following error:
> ======================================
> C:\Python25\Lib\site-packages\PythonCard\tools
> \codeEditor>codeEditor.py
> Traceback (most recent call last):
>   File "C:\Python25\Lib\site-packages\PythonCard\tools\codeEditor
> \codeEditor.py", line 13, in <module>
>     from PythonCard import about, configuration, dialog, log, menu, 
> model, resource, util
>   File "C:\Python25\lib\site-packages\PythonCard\about.py", line 8, in 
> <module>
>     import wx
> ImportError: No module named wx
> ======================================
> 
> Does anyone know what the problem might be?
> 
> Thanks,
> Tequila

It would appear that you need to install wxPython also.

http://www.wxpython.org/


From reedobrien at gmail.com  Thu Jan 11 11:05:13 2007
From: reedobrien at gmail.com (reed)
Date: 11 Jan 2007 08:05:13 -0800
Subject: Progress count in terminal (Mac OS X)
In-Reply-To: <mailman.2579.1168527876.32031.python-list@python.org>
References: <9079A3B8-47A8-495A-BFAE-09A603CFB819@mac.com>
	<eo5h6f$lsu$1@sea.gmane.org>
	<mailman.2579.1168527876.32031.python-list@python.org>
Message-ID: <1168531513.198600.59420@k58g2000hse.googlegroups.com>

> >     for i in range(100):
> >         sys.stdout.write( "\r" + "count               ", i,)
>>          sys.stdout.flush()
> >     print # done

maybe

Tommy Grav wrote:
> This certainly does work when running the interpreter interactively,
> but when inserted into a script it seems to buffer the print statement
> and not write it out to the terminal. How can I force the print
> statement
> to not buffer the output?
>
> Cheers
>     Tommy
>
> On Jan 11, 2007, at 9:22 AM, Fredrik Lundh wrote:
>
> > Tommy Grav <tgrav at mac.com>:
> >
> >> I have a program that does a lot of iterations and would like
> >> to follow its progress by having it print out the current iteration
> >> number as it progresses. How do I do this so that it appears
> >> like a counter that increases in the same place in the terminal
> >> window? I am using python2.5 on a Mac OSX and its terminal
> >> tcsh window.
> >
> > print a carriage return before, and no line feed after, each line:
> >
> >     for i in range(100):
> >         print "\r" + "count", i,
> >     print # done
> >
> > </F>
> >
> >
> >
> > -- 
> > http://mail.python.org/mailman/listinfo/python-list



From almondb at gmail.com  Tue Jan  9 00:09:41 2007
From: almondb at gmail.com (Brian)
Date: 8 Jan 2007 21:09:41 -0800
Subject: Getting started with Crystal Reports...little help in the far
	court.
In-Reply-To: <1168293388.349793.256790@s80g2000cwa.googlegroups.com>
References: <1168293388.349793.256790@s80g2000cwa.googlegroups.com>
Message-ID: <1168319381.190806.38690@s34g2000cwa.googlegroups.com>

Mudcat wrote:
> I am not that familiar with Crystal Reports, but having read some other
> posts I know that the way to integrate the API with Python is through
> the COM interface provide by win32all.
....
> Any pointers in the right direction would be helpful.

Like Armury, I worked on Crystal stuff quite a long time ago.  Here's a
script I was able to dig up.  Edited to protect the innocent.  ;-)

import sys
from win32com.client import Dispatch

app = Dispatch('CrystalRunTime.Application')
rep = app.OpenReport('foo.rpt')
tbl = rep.Database.Tables.Item(1)

prop = tbl.ConnectionProperties('Password')
prop.Value = sys.argv[1]

prop = tbl.ConnectionProperties('Data Source')
prop.Value = 'server'

# tbl.TestConnectivity() should return 1

# clear and set 3 parameters
params = rep.ParameterFields
p1 = params(1)
p2 = params(2)
p3 = params(3)

for param in (p1,p2,p3): param.ClearCurrentValueAndRange()

p1.AddCurrentValue(123)
p2.AddCurrentValue(456)
p3.AddCurrentValue('12/31/99')

rep.PrintOut(promptUser=False)



From exarkun at divmod.com  Mon Jan 29 16:04:56 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 29 Jan 2007 16:04:56 -0500
Subject: Executing Javascript, then reading value
In-Reply-To: <1170103447.839304.44900@v33g2000cwv.googlegroups.com>
Message-ID: <20070129210456.25807.494023925.divmod.quotient.2701@ohm>

On 29 Jan 2007 12:44:07 -0800, Melih Onvural <melih.onvural at gmail.com> wrote:
>I need to execute some javascript and then read the value as part of a
>program that I am writing. I am currently doing something like this:

Python doesn't include a JavaScript runtime.  You might look into the
stand-alone Spidermonkey runtime.  However, it lacks the DOM APIs, so
it may not be able to run the JavaScript you are interested in running.
There are a couple other JavaScript runtimes available, at least.  If
Spidermonkey is not suitable, you might look into one of them.

Jean-Paul


From paul at boddie.org.uk  Tue Jan 30 11:27:09 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 30 Jan 2007 08:27:09 -0800
Subject: Please take me off the list
In-Reply-To: <mailman.3308.1170171186.32031.python-list@python.org>
References: <B40EE572-0110-1000-9DC8-F4C4A789181E-Webmail-10019@mac.com>
	<mailman.3308.1170171186.32031.python-list@python.org>
Message-ID: <1170174428.224923.5500@p10g2000cwp.googlegroups.com>

On 30 Jan, 16:33, Mikael Olofsson <mik... at isy.liu.se> wrote:
>
>    http://mail.python.org/mailman/listinfo/python-list

See also the Tutor mailing list, which might be a bit better for 
starting to learn Python, should you (Daniel) decide to change your 
mind. Here's the mailing list's Web page:

http://mail.python.org/mailman/listinfo/tutor

If you haven't seen much information for beginners, take a look at 
these pages for some references:

http://www.python.org/about/gettingstarted/
http://wiki.python.org/moin/BeginnersGuide

Paul

P.S. There does seem to be a lot of information, especially in the 
upper regions of the python.org Wiki, which is either incoherent or 
which gives the signal that hacking on the Python interpreter itself 
is what everyone should be wanting to do. Before it became "immutable" 
I was tempted to give the Wiki front page an overhaul, just to link 
more prominently to stuff like tutorials as well as the more active 
reference pages, but I suppose we're stuck with the current "back 
door" overview (along with semi-personal requests pages) for the time 
being.



From bjourne at gmail.com  Tue Jan 16 11:37:06 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Tue, 16 Jan 2007 17:37:06 +0100
Subject: Conflicting needs for __init__ method
In-Reply-To: <pan.2007.01.16.03.02.03.4711@REMOVEME.cybersource.com.au>
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<mailman.2741.1168898073.32031.python-list@python.org>
	<pan.2007.01.16.03.02.03.4711@REMOVEME.cybersource.com.au>
Message-ID: <740c3aec0701160837r33340866w5ddef3e09a0de537@mail.gmail.com>

On 1/16/07, Steven D'Aprano <steve at removeme.cybersource.com.au> wrote:
> On Tue, 16 Jan 2007 08:54:09 +1100, Ben Finney wrote:
> Think of built-ins like str() and int(). I suggest that people would be
> *really* unhappy if we needed to do this:
>
> str.from_int(45)
> str.from_float(45.0)
> str.from_list([45, 45.5])
> etc.
>
> Why do you consider that Rationals are different from built-ins in this
> regard?

I would solve that with:

import rational
rational.rational(45)
rational.rational(45.0)
rational.rational([45, 45.5])

def rational(obj):
    initers = [(int, from_int), (basestring, from_str), (list, from_list)]
    for obj_type, initer in initers:
        if isinstance(obj, obj_type):
            return initer(obj)
    raise ValueError("Can not create a rational from a %r" % type(obj).__name__)

-- 
mvh Bj?rn


From Roberto.Bonvallet at cern.ch  Thu Jan 18 05:38:35 2007
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Thu, 18 Jan 2007 10:38:35 +0000 (UTC)
Subject: DOTALL not working as expected
References: <pan.2007.01.18.10.10.08.356617@hora-obscura.de>
	<pan.2007.01.18.10.19.20.440079@hora-obscura.de>
Message-ID: <eoninb$77p$2@cernne03.cern.ch>

Stefan Palme wrote:
>> using the "re" module of Python (2.3 and 2.4), I tried the following:
>> 
>>   import re
>>   print re.sub('X.*?Y', 'Z', 'Xab\ncdY', re.DOTALL)
>> 
> Just noticed, that it works when *compiling* the pattern:
> 
>  import re
>  p = re.compile('X.*?Y', re.DOTALL)
>  print re.sub(p, 'Z', 'Xab\ncdY')
> 
> Still the question - my fault or a bug?

Your fault.  According to the documentation [1], the re.sub function takes
a count as a fourth argument, not the compilation flags.

[1] http://docs.python.org/lib/node46.html

Cheers,
-- 
Roberto Bonvallet


From podi.ex at gmail.com  Tue Jan  2 19:05:33 2007
From: podi.ex at gmail.com (Podi)
Date: 2 Jan 2007 16:05:33 -0800
Subject: array of class
References: <mailman.2221.1167763760.32031.python-list@python.org>
	<459ad4f7$0$293$426a34cc@news.free.fr>
	<1167777053.152492.3460@v33g2000cwv.googlegroups.com>
	<459ae31f$0$294$426a74cc@news.free.fr>
Message-ID: <1167782733.743870.228760@k21g2000cwa.googlegroups.com>


> > Or more compactly:
> >
> > words = [Word(w) for w in 'this is probably what you want'.split()]
> > print words
>
> I didn't want to introduce yet some more "confusing" stuff !-)

Indeed, the for loop is perfectly fine and totally readable. Let's save
the "confusing stuff" to the Perl folks.



From rweth at cisco.com  Sat Jan  6 17:31:45 2007
From: rweth at cisco.com (rweth)
Date: Sat, 06 Jan 2007 14:31:45 -0800
Subject: search mail by date with imaplib
In-Reply-To: <mailman.2375.1168121727.32031.python-list@python.org>
References: <mailman.2375.1168121727.32031.python-list@python.org>
Message-ID: <1168122706.122766@sj-nntpcache-1.cisco.com>

Jean-Paul Calderone wrote:
> On Sat, 06 Jan 2007 11:49:17 -0800, rweth <rweth at cisco.com> wrote:
>> csselo at gmail.com wrote:
>>> Hi
>>> I am looking for a code sample which searches mail by date with imaplib
>>>
>>> example:
>>> get email from 01.01.2007 to now
>>>
>>> how can I change imaplib search parameters?
>>>
>> So I had to do the same thing a few years back. I love python but
>> seriously every author spends less than 1/10 of 1% on doc !
>>
>> Well So do I .. so take it with a grain of salt. Here is what I did,
>> MANY YEARS AGO .. I don't even have a IMAP account anymore
>>
>> t,data = M.uid("SEARCH",None,'(FROM blahblah)')
>> luid = string.split(data[0])
>> for uid in luid:
>>   t,d = M.uid("FETCH",uid,"(BODY[HEADER.FIELDS (DATE SUBJECT TO)])")
>>   date = d[0][1]
>>
>> This will get you the dates .. and you can write your own
>> filter off that .. it's trivial. What isn't so great is
>> getting every piece of mail and then searching for the needle's in
>> the haystack.
>>
>> So I guess this is plan c (just in case you don't get a better answer).
>> I will watch this one for a "plan a | b" answer.
>>
> 
> The SEARCH command supports quite a few kinds of criteria.  Several which
> may be relevant here are BEFORE, SINCE, SENTBEFORE, and SENTSINCE.  Using
> Twisted's IMAP4 code, you can format a query like this:
> 
>    >>> from twisted.mail.imap4 import Query
>    >>> Query(after='01-Jan-2007')
>    '(AFTER "01-Jan-2007")'
>    >>>
> 
> Since documentation was brought up, I'll point out Query's docs too, since
> that might help shed some further light on what's possible.
> 
> http://twistedmatrix.com/documents/current/api/twisted.mail.imap4.html#twisted.mail.imap4.Query 
> 
> 
> Jean-Paul
Wow looks like twisted took Imap4 and made it better!
I think I had better read up on twisted .. this looks quite
good (Plan A for sure).


From larry.bates at websafe.com  Mon Jan  8 15:06:12 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 08 Jan 2007 14:06:12 -0600
Subject: Execute binary code
In-Reply-To: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
Message-ID: <EOSdneXxmrS6OT_YnZ2dnUVZ_q7inZ2d@comcast.com>

citronelu at yahoo.com wrote:
> Is it possible to execute a binary string stored within a python script
> as executable code ?
> 
> The script is run under Windows, and the binary code (a full executable
> file) is stored in a variable in the script.
> 
> I know I can use os.system() or os.popen() to run an external file, but
> these functions take as argument a string evaluated as command-line.
> 
> I also know I could save the binary code as a temporary file, execute
> it and delete it afterwards, but this is not an alternative.
> 
> Thanks.
> 

What you are asking is a virus/trojan "like" program.  There's no reason
you shouldn't be able to write the code to TEMP directory and execute it.

-Larry


From smusnmrNOSPAM at yahoo.com  Sat Jan 20 12:54:12 2007
From: smusnmrNOSPAM at yahoo.com (Siggi)
Date: Sat, 20 Jan 2007 18:54:12 +0100
Subject: Win GUI application: avoiding DOS console
Message-ID: <eotkr7$ffdf$1@zam602.zam.kfa-juelich.de>

Hi all,

how do I avoid the DOS console show-up when starting a WinXP GUI application 
with mouseclick on the respective Python file?

I had this with my previous Python installation; it is very simple, 
something with a "-i" somewhere in the open command of the  MS Windows data 
types "PY" and "PYW". But after a new Python installation, this was lost, 
and I cannot find the instruction what to do.

Please help!

Thanks,

siggi 




From svithi at gmail.com  Sat Jan  6 23:24:31 2007
From: svithi at gmail.com (vinthan)
Date: 6 Jan 2007 20:24:31 -0800
Subject: How to write code to get focuse the application which is open from
	server
Message-ID: <1168143871.536432.252010@v33g2000cwv.googlegroups.com>

hi,
I am new to python. I have to write test cases in python. An
application is open in the desk top ( application writen in .Net) I
have to write code to get focuse the application and click on the link
which in the one side  and it will load the map on the other and I have
to check map is loaded. Any one tell me how do I use Dispatch or any
other method to write a code.



From daniele.varrazzo at gmail.com  Wed Jan 31 08:45:46 2007
From: daniele.varrazzo at gmail.com (Daniele Varrazzo)
Date: 31 Jan 2007 05:45:46 -0800
Subject: Help needed on config files
In-Reply-To: <1170237893.930122.138300@v45g2000cwv.googlegroups.com>
References: <1170237893.930122.138300@v45g2000cwv.googlegroups.com>
Message-ID: <1170251146.519602.118130@v33g2000cwv.googlegroups.com>

On Jan 31, 11:04 am, "jvdb" <streamserv... at gmail.com> wrote:
> Hi there,
>
> I am quite new on python programming and need some help on solving my
> problem..
>
> I have to make a (python) program which deletes files from
> directories. I don't think deleting, etc. is the problem. The problem
> is that the directories where i have to delete them are 'dynamic'/
> subject to change. So what i thought is to make a config file
> containing an identifier (useful for myself) and there the directory.
> something like:
> [PROJECTx]
> <path>
> [PROJECTy]
> <path>
>
> I have already seen that there are sorts of modules where you can read
> a config file, but only when you know the key.. Can someone help me
> out on this? The configfile can be altered in time (as there are more
> projects coming where i have to delete files on a scheduled basis).

The classes defined in the ConfigParser module contain a 'sections()'
method that do what you need.

http://docs.python.org/lib/module-ConfigParser.html

Daniele



From rocky at panix.com  Thu Jan 25 14:15:43 2007
From: rocky at panix.com (R. Bernstein)
Date: 25 Jan 2007 14:15:43 -0500
Subject: Possible bug in Python 2.5? (Was Re: pdb in python2.5)
References: <1169717486.230356.79730@l53g2000cwa.googlegroups.com>
	<wihtzyfs17s.fsf@panix3.panix.com>
Message-ID: <wihps92sysg.fsf_-_@panix3.panix.com>

I'd like to change my assessment of whether the problem encountered is
a pdb bug or not. It could be a bug in Python. (Right now it is only
known to be a bug in version 2.5.)

For a given traceback t, the question is whether t.tb_frame.f_lineno
can ever be different from t.tb_lineno.

Still, for now in pydb CVS, I've worked around this by checking.

rocky at panix.com (R. Bernstein) writes:

> "Rotem" <vmalloc at gmail.com> writes:
> 
> > Hi,
> > 
> > Maybe I'm repeating a previous post (please correct me if I am).
> > 
> > I've tried the following code in python 2.5 (r25:51908, Oct  6 2006,
> > 15:22:41)
> > example:
> > 
> > from __future__ import with_statement
> > import threading
> > 
> > def f():
> >     l = threading.Lock()
> >     with l:
> >         print "hello"
> >         raise Exception("error")
> >         print "world"
> > 
> > try:
> >     f()
> > except:
> >    import pdb
> >    pdb.pm()
> > 
> > This fails because pdb.pm() attempts to access sys.last_traceback which
> > is not assigned.
> 
> Recent releases of pydb (http://bashdb.sf.net/pydb) don't suffer this
> problem. (But see below.)
> 
> > Trying:
> > pdb.post_mortem(sys.exc_traceback)
> > 
> > Yields the following:
> > > test.py(9)f()
> > -> print "world"
> > (Pdb)
> > 
> > the 'w' command yields a similar output, which implies that the
> > exception was thrown from the wrong line.
> > the traceback module is better, yielding correct results (displays line
> > 8 instead of 9).
> > 
> > Has anyone encountered this behavior? 
> 
> Yes, this seems to be a bug in pdb. It is using the traceback's f_line
> instance variable rather than the tb_lineno instance variable. I guess
> these two values are usually the same. In fact, I haven't been able to
> come up with a Python 2.4 situtation where they are different. (If
> someone can, I'd appreciate it if you'd send me a small example so I
> can put it in the pydb regression tests.) Even in 2.5, it's kind of
> hard to get a case where they are different. If I remove the "with",
> the problem goes away.
> 
> It was also bug in pydb, but I've just committed in CVS the fix for
> this
> 
> 
> > is pdb broken?
> 
> Best as I can tell pdb isn't all that well maintained. (Had it been, I
> probably wouldn't have devoted the time to pydb that I have been.)
> 
> > I get similar results for larger/more complex pieces of code.
> 
> > 
> > Thanks in advance,
> > 
> > Rotem


From nagle at animats.com  Tue Jan 16 23:51:18 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 16 Jan 2007 20:51:18 -0800
Subject: Does class patching actually work
In-Reply-To: <eohiiu$3j6$1@daisy.noc.ucla.edu>
References: <k4Xqh.49756$wc5.21255@newssvr25.news.prodigy.net>
	<eohiiu$3j6$1@daisy.noc.ucla.edu>
Message-ID: <Jvhrh.16802$ZT3.748@newssvr19.news.prodigy.com>

James Stroud wrote:
> John Nagle wrote:

>> The intent of this is to replace method open_https of class URLopener
>> with a local, patched version.
>>
>> Does that actually work?  When I've tried to do that in other code, it
>> seems to have no effect.  In fact, I can write
>>
>>     URLopener.open_https = None
>>
>> and nothing changes.

    My mistake.  Confusion between

	import a.b
	c = foo

and

	import a
	b.c = foo

which result in different namespaces.

					John Nagle


From martinglobal at gmail.com  Mon Jan 29 16:42:21 2007
From: martinglobal at gmail.com (Martin Global)
Date: 29 Jan 2007 13:42:21 -0800
Subject: We sell to everyone!!! Government, Wholesalers, Distributers,
	Entreprenuers.....www.martin-global.com
Message-ID: <1170106941.457739.34520@a75g2000cwd.googlegroups.com>

Martin Global is one of North America's leading importers of goods
 manufactured and produced throughout Asia. We are distinctively 
unique
 from other importers, as we have one of North America's largest 
networks
 linking our organization directly to thousands of manufacturers and 
suppliers in
 Asia and throughout the world.

 We at Martin Global are proud of our reputation for excellence: a
 reputation based on our commitment to the highest manufacturing and 
ethical
 standards.  At Martin Global, all of our business relationships with 
customers,
 suppliers, manufacturers and employees rest on a foundation of 
integrity and
 trust.


 Mission Statement

 Martin Global puts the needs of its clients first! We strive to 
establish
 long-term personal relationships built upon clients' trust in our 
ability
 to provide superior products at competitive prices. Whether you're a 
large
 corporation, government entity or a sole proprietor, we take these
 relationships very seriously and we believe that our success is 
measured
 by the success of our clients and their return business. Inquiries 
always welcomed.

 Your message will responded to within 8 hours.

 Regards,


 Donovan Martin
 Martin Global

www.martin-global.com



From bignose+hates-spam at benfinney.id.au  Wed Jan 31 18:40:05 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 01 Feb 2007 10:40:05 +1100
Subject: parent-child object design question
References: <1170136965.015119.225920@q2g2000cwa.googlegroups.com>
	<mailman.3297.1170139632.32031.python-list@python.org>
	<1170220553.843010.258260@a34g2000cwb.googlegroups.com>
	<pan.2007.01.31.07.24.21.793319@REMOVEME.cybersource.com.au>
	<mailman.3341.1170234961.32031.python-list@python.org>
	<1170284969.902118.155570@l53g2000cwa.googlegroups.com>
Message-ID: <878xfivk8a.fsf@benfinney.id.au>

"manstey" <manstey at csu.edu.au> writes:

> However, the problem is now that I can also write:
> >>> insOref.Chapter=67
> but we want to disallow this, as insOref.Chapter must remain =
> insProperty

Then don't do that.

Python allows any name to be reassigned to any value, with the
attitude of "we're all consenting adults here". It's better to
document[0] the correct behaviour of
your code, rather than trying to prevent stupid mistakes.


[0]: and unit tests, that explicitly check the behaviour of the code,
and get run all the time during development of the code, are the best
way of documenting behaviour unambiguously.

-- 
 \     "Buy not what you want, but what you need; what you do not need |
  `\           is expensive at a penny."  -- Cato, 234-149 BC, Relique |
_o__)                                                                  |
Ben Finney



From vpolukcht at gmail.com  Thu Jan 18 07:00:09 2007
From: vpolukcht at gmail.com (Victor Polukcht)
Date: 18 Jan 2007 04:00:09 -0800
Subject: One more regular expressions question
In-Reply-To: <1169120317.437211.73660@m58g2000cwm.googlegroups.com>
References: <1169113767.320500.71200@11g2000cwr.googlegroups.com>
	<1169120317.437211.73660@m58g2000cwm.googlegroups.com>
Message-ID: <1169121609.571152.214850@11g2000cwr.googlegroups.com>

Great thanks.

You post helped me so much!

My resulting regexp is:
"(?P<var1>^(.*)\s*)\(((?P<var2>\d+))\)\s+((?P<var3>\d+))"

On Jan 18, 2:38 pm, "Daniele Varrazzo" <daniele.varra... at gmail.com>
wrote:
> Victor Polukcht wrote:
> > I have a couple of strings like:
>
> > Unassigned Number (1)                                    32
> [...]
> > Interworking, unspecified (127)                          5
>
> > I need to get:
> > Error code (value in brackets) - Value - Message.
>
> > My actual problem is i can't get how to include space, comma, slash.Probably you have some escaping problem. The substitution:
>
>   re.sub(r"^(.*)\s*\((\d+)\)\s+(\d+)", r'\2 - \3 - \1', row)
>
> does the required job (where "row" is one of your lines)
>
> To match a special character, such as "(", you need to escape it with a
> "\", because it has a special meaning in the regexp syntax. Because "\"
> is the escaping mechanism for Python strings too, you better use raw
> strings to specify the pattern.
>
> Other special character/groups matching patterns, such as "\s" to
> specify whitespaces, are documented, together with everything else you
> need, athttp://docs.python.org/lib/re-syntax.html
> 
> HTH
> 
> Daniele



From ejohnso9 at earthlink.net  Thu Jan 11 13:50:20 2007
From: ejohnso9 at earthlink.net (ej)
Date: 11 Jan 2007 10:50:20 -0800
Subject: subclassing a module: misleading(?) error message
In-Reply-To: <1167946286.988570.216110@i15g2000cwa.googlegroups.com>
References: <459d687a$1@nntp.zianet.com>
	<1167946286.988570.216110@i15g2000cwa.googlegroups.com>
Message-ID: <1168541420.185412.211380@o58g2000hsb.googlegroups.com>


Carl Banks wrote:

<snip> A good explanation

I have not been able to get back to news lately - lot going on, but
thank you for your time to explain that to me. It mostly makes pretty
good sense to me, but I will have to study metaclasses further. ;)

Thanks,
-ej



From danielkleinad at gmail.com  Tue Jan 30 14:20:51 2007
From: danielkleinad at gmail.com (Daniel Klein)
Date: Tue, 30 Jan 2007 19:20:51 GMT
Subject: strip question
References: <1169876027.003477.161350@a75g2000cwd.googlegroups.com>
Message-ID: <k46vr2lrc1k03p4nio6v6om0m4kf7lgl10@4ax.com>

On 26 Jan 2007 21:33:47 -0800, eight02645999 at yahoo.com wrote:

>hi
>can someone explain strip() for these :
>[code]
>>>> x='www.example.com'
>>>> x.strip('cmowz.')
>'example'
>[/code]
>
>when i did this:
>[code]
>>>> x = 'abcd,words.words'
>>>> x.strip(',.')
>'abcd,words.words'
>[/code]
>
>it does not strip off "," and "." .Why is this so?
>thanks

If you only have a couple of characters to deal with then use
replace(). Otherwise use string.translate() :

>>> import string
>>> x = 'abcd,words.words'
>>> transform = string.maketrans(',.','..')
>>> x = string.translate(x, transform)
>>> x = x.replace('.','')
>>> x
'abcdwordswords''


Dan


From andrea.massa at gmail.com  Tue Jan  9 04:43:41 2007
From: andrea.massa at gmail.com (Nuke)
Date: 9 Jan 2007 01:43:41 -0800
Subject: formattazione cifra con decimali
In-Reply-To: <1168335548.504284.287150@q40g2000cwq.googlegroups.com>
References: <1168335548.504284.287150@q40g2000cwq.googlegroups.com>
Message-ID: <1168335821.473566.220190@38g2000cwa.googlegroups.com>


Nuke ha scritto:

> Ho cercato un poco sulla documentazione di python senza trovare una
> risposta soddisfacente al mio problema, quindi spero di trovare un
> aiuto qui.
> Ho creato un programmino che mi fa alcuni calcoli e riepiloghi
> personali e vorrei visualizzare i totali numerici in euro con la
> formattazione comprensiva dei separatori decimali.
>
> Per esempio ho un totale scritto attualmente cos?:   50320,12  e
> vorrei che si visualizzasse cosi: 50.320,12
>
> esiste gi? una qualche funzione che mi formatta il numero (o la
> stringa eventualmente) in questo modo?
>
> Grazie a chi sapr? darmi una risposta in merito.


Sorry for the language, i think the group was in italian language...
sorry :(
I try to explain my problem in english:

I need to visualize a number (or a string of that number) using the
decimal separator.
i have this number visualized: 50320,12 and i need that the
visualization of this number is: 50.320,13.
There is a function that directly convert the number (or the string) ?

Thank in advance, and sorry again for the language used before.



From ccardelli at iv-srl.it  Mon Jan 29 03:43:44 2007
From: ccardelli at iv-srl.it (ccardelli at iv-srl.it)
Date: 29 Jan 2007 00:43:44 -0800
Subject: SpecTix
Message-ID: <1170060224.678000.185560@h3g2000cwc.googlegroups.com>

Hi all.
I'd like to test the SpecTix package (GUI generation for TK). I have 
read somewhere that it can generate GUI code for python, but the 
download location (http://starship.python.net/crew/mike/Spectix/) is 
inactive.
Could someone provide a copy of the package or suggest an alternate 
download site?
Latest version seems to be 1.2a3-1.4.
Thank you.



From fccoelho at gmail.com  Wed Jan 24 16:43:24 2007
From: fccoelho at gmail.com (Flavio)
Date: 24 Jan 2007 13:43:24 -0800
Subject: raise UnicodeError, "label too long"
References: <1169672223.231030.262610@l53g2000cwa.googlegroups.com>
	<pan.2007.01.24.21.23.25.331322@gmx.net>
Message-ID: <1169675004.099912.79520@v33g2000cwv.googlegroups.com>

What I am doing is very simple:

I fetch an url (html page) parse it using BeautifulSoup, extract the
links and try to open each of the links, repeating the cycle.

Beautiful soup converts the html to unicode. That's why when I try to
open the links extracted from the page I get this error.

This is bad, since some links do contain strings with non-ascii
characters.

thanks,

Fl?vio


Marc 'BlackJack' Rintsch escreveu:
> In <1169672223.231030.262610 at l53g2000cwa.googlegroups.com>, Flavio wrote:
>
> > Hi I am havin a problem with urllib2.urlopen.
> >
> > I get this error when I try to pass a unicode to it.
> >
> > raise UnicodeError, "label too long"
> >
> > is this problem avoidable? no browser or programs such as wget seem to
> > have a problem with these strings.
>
> What exactly are you doing?  How does a (unicode?) string look like that
> triggers this exception?
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch



From joshua at eeinternet.com  Wed Jan 24 17:57:53 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 24 Jan 2007 13:57:53 -0900
Subject: Beginners Tutorial in PDF Format?
References: <_6Qsh.51414$wc5.5373@newssvr25.news.prodigy.net><1169415358.277431.130640@s34g2000cwa.googlegroups.com>	<FJTsh.36658$Gr2.32367@newssvr21.news.prodigy.net>
	<mailman.2971.1169427468.32031.python-list@python.org>
	<zKPth.66058$qO4.61284@newssvr13.news.prodigy.net>
Message-ID: <45b7d7cb$0$24391$88260bb3@free.teranews.com>

W. Watson wrote:

>>> http://docs.python.org/download.html
>> 
>> Try again. The first url goes to this page:
>> Download Python 2.5 Documentation (19 September 2006): To download an
>> archive containing all the documents for this version of Python in one
>> of various formats [pdf included, you can choose between Letter/A4].
>> Below, it says "These documents are not available for download
>> individually."
>> 
> There is nothing there with the title "Python 2.5 Documentation".

Really? At http://docs.python.org/download.html the header across
says "Download Python 2.5 Documentation (19 September 2006)" and the links
for downloading are, for example,
http://docs.python.org/ftp/python/doc/2.5/pdf-letter-2.5.zip  "2.5" occurs
twice in that URL.  I think that's a pretty good indicator that it is a
download for version 2.5.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From horpner at yahoo.com  Sat Jan 27 02:26:19 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 27 Jan 2007 07:26:19 GMT
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
	<45ba50c7$0$31432$426a74cc@news.free.fr>
	<slrnerks72.jc.horpner@FIAD06.norwich.edu>
	<12rl5mq4nnqoea0@corp.supernews.com>
Message-ID: <v8Duh.1841$G23.514@newsreading01.news.tds.net>

On 2007-01-27, Thomas Dickey <dickey at saltmine.radix.net> wrote:
> Neil Cerutti <horpner at yahoo.com> wrote:
>> I don't really expect it to work, but if anything will, that
>> is it. Curses supports only ASCII and a some special symbol
>> codes defined by curses.
>
> un - no.  Curses supports whatever the flavor of curses you
> have does. Often that's the 8-bit flavor of ncurses, but the
> limitation is definitely in the python configuration.

Thanks for the clarification. I was going by the some Python
documentation, but I did notice contradictory information in
other discussion. The 8-bit ncurses is supposed to support
iso-8859-1 through iso-8859-15, i.e., all the byle encodings. I
don't know why Python's bindings don't work.

-- 
Neil Cerutti


From tomas at fancy.org  Wed Jan  3 13:36:56 2007
From: tomas at fancy.org (Tom Plunket)
Date: Wed, 03 Jan 2007 10:36:56 -0800
Subject: A python library to convert RTF into PDF ?
References: <1167846487.943390.192130@a3g2000cwd.googlegroups.com>
Message-ID: <5stnp25m2uffc4n5k7g9e68hk2l85u4fmm@4ax.com>

leonel.gayard at gmail.com wrote:

> So, what library can I use to convert from RTF to PDF ? GPL / BSD
> Libraries are welcome.

If you could write to LaTeX files instead, you could then just use
pdflatex that comes with all of the LaTeX distributions.


-tom!

-- 


From bob at passcal.nmt.edu  Tue Jan  2 18:43:37 2007
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Tue, 2 Jan 2007 16:43:37 -0700
Subject: Need old pywin32/win32all for Win95
Message-ID: <3pudnVzXD-m3cwfYnZ2dnUVZ_qCmnZ2d@nmt.edu>

Does anyone have an old version of this?  I've got some old OEM stuff that 
will only handle Win95 because of some custom hardware drivers.  The build 
200 on sourceforge of pywin32 isn't old enough.  I'm trying to get pyserial 
up and running.  Python/Tkinter does OK at 233MHz! :)

Thanks!

Bob




From robert.kern at gmail.com  Sat Jan 20 19:36:11 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 20 Jan 2007 18:36:11 -0600
Subject: scipy.optimize.lbfgsb help please!!!
In-Reply-To: <eoubge$pvi$1@gemini.csx.cam.ac.uk>
References: <eotep7$ik$1@gemini.csx.cam.ac.uk>	<mailman.2953.1169333789.32031.python-list@python.org>
	<eoubge$pvi$1@gemini.csx.cam.ac.uk>
Message-ID: <eouci6$nnt$1@sea.gmane.org>

mclaugb wrote:
> " x, f, d = lbfgsb.fmin_l_bfgs_b(Permmin, x0, Jacobi, params, 
> bounds=[(.001,100),(-50,-.001)] , maxfun=500)
>   File "C:\Python24\lib\site-packages\scipy\optimize\lbfgsb.py", line 197, 
> in fmin_l_bfgs_b
>     isave, dsave)
> ValueError: failed to initialize intent(inout) array -- expected elsize=8 
> but got 4 -- input 'l' not compatible to 'd'"

And also tell us your platform. I suspect this is a 64-bit problem.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From steve at holdenweb.com  Tue Jan 30 00:00:25 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 30 Jan 2007 05:00:25 +0000
Subject: Off-Topic Posts
In-Reply-To: <1170084373.204141.279900@v45g2000cwv.googlegroups.com>
References: <1169821615.198847.237790@m58g2000cwm.googlegroups.com>	<v20lr25qm8l0li35vunf5h99qfj3mam4v5@4ax.com>	<1169852283.740452.87800@m58g2000cwm.googlegroups.com>	<etgnr2lg89137k2ad5a2b0da6slk9j448u@4ax.com>
	<1170084373.204141.279900@v45g2000cwv.googlegroups.com>
Message-ID: <epmjd5$7k4$1@sea.gmane.org>

thermate at india.com wrote:
> On Jan 27, 1:31 pm, Jim Klein <jamesekl... at earthlink.net> wrote:
>> I'm not one of the conquered races, I'm Swiss. We are the bankers to
>> the conquerers. :-)
> 
> Exactly, Honorable J Klein, (although my reference was a general one, 
> you have entered the thread, so I will pick the swiss case) more like 
> tributaries to the conquerers ... I

I suppose I'd be a fascist if I suggested that you are posting this crap 
inappropriately and you should piss off to where you were appreciated 
(if any such cyber-place exists)? sigh ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From webmaster at cacradicalgrace.org  Wed Jan  3 17:15:58 2007
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Wed, 03 Jan 2007 15:15:58 -0700
Subject: Iterate through list two items at a time
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
	<mailman.2229.1167793044.32031.python-list@python.org>
Message-ID: <enh9vl$9ak$1@aioe.org>

Gabriel Genellina wrote:
> b=iter(a)
> for x in b:
>    y=b.next()
>    print x,y
> 

So as not to choke on odd-length lists, you could try

a = [1,2,3,4,5,6,7]
b = iter(a)
for x in b:
    try:
         y=b.next()
    except StopIteration:
         y=None
    print x,y

Substitute in whatever for y=None that you like.

Cheers,
Cliff


From http  Thu Jan 25 07:57:15 2007
From: http (Paul Rubin)
Date: 25 Jan 2007 04:57:15 -0800
Subject: While loop with "or"? Please help!
References: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
	<45b8a31d$0$2401$426a74cc@news.free.fr>
	<epa8cl$vl0$02$1@news.t-online.com>
Message-ID: <7xlkjrtgb8.fsf@ruckus.brouhaha.com>

Peter Otten <__peter__ at web.de> writes:
> > while?not?usrinp.lower()?in?"yn":
> 
> But note that 'in' performs a substring search and therefore "yn" and ""
> would be accepted as valid answers, too.

Oh right, that's a recent change to the language, I think.  OK:

  while?not?usrinp.lower()?in?list("yn"): ...


From sjdevnull at yahoo.com  Wed Jan  3 04:57:01 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 3 Jan 2007 01:57:01 -0800
Subject: Synchronization methodology
In-Reply-To: <mailman.2231.1167803272.32031.python-list@python.org>
References: <mailman.2231.1167803272.32031.python-list@python.org>
Message-ID: <1167818221.856368.38210@42g2000cwt.googlegroups.com>

Chris Ashurst wrote:
> Hi, I'm coming in from a despised Java background

Consider strongly the fact that Python supports multiple process
solutions well, so you're not stuck having to use multithreaded
solutions in every circumstance (but can still use them when necessary).



From martin at v.loewis.de  Fri Jan  5 04:25:28 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 05 Jan 2007 10:25:28 +0100
Subject: PyType_IsSubtype ()
In-Reply-To: <1167986947.735415.99970@s34g2000cwa.googlegroups.com>
References: <1167986947.735415.99970@s34g2000cwa.googlegroups.com>
Message-ID: <459E1988.8060807@v.loewis.de>

Sheldon schrieb:
> Can anyone tell me what this error mean:
> #0  0x4008376e in PyType_IsSubtype () from /usr/lib/libpython2.3.so.1.0

It's not an error. It is just a frame from the backtrace.

To understand the crash better, one would need to see more frames from
the backtrace. Ideally, one would run the program in a debugger to
analyse it further.

Regards,
Martin


From gandalf at designaproduct.biz  Tue Jan  9 13:25:35 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Tue, 09 Jan 2007 19:25:35 +0100
Subject: Question about using "with"
In-Reply-To: <Pine.LNX.4.64.0701091256501.25764@saturn.syslang.net>
References: <Pine.LNX.4.64.0701091256501.25764@saturn.syslang.net>
Message-ID: <45A3DE1F.4020909@designaproduct.biz>


>
> 591 > ./cat.py cat.py
>    File "./cat.py", line 6
>      with open(sys.argv[nn]) as f:
>              ^
> SyntaxError: invalid syntax
> 592 >
>
> This example came from http://docs.python.org/tut/node10.html down in 
> section 8.7
>
> Am I missing something?
>   
Are you using python 2.5? The with statement is not available before 2.5.

   Laszlo



From chris at kateandchris.net  Fri Jan  5 17:45:45 2007
From: chris at kateandchris.net (Chris Lambacher)
Date: Fri, 5 Jan 2007 17:45:45 -0500
Subject: Newbie XML SAX Parsing: How do I ignore an invalid token?
In-Reply-To: <1168033818.692201.183790@11g2000cwr.googlegroups.com>
References: <1168033818.692201.183790@11g2000cwr.googlegroups.com>
Message-ID: <20070105224545.GA2177@kateandchris.net>

What exactly is invalid about the XML fragment you provided?
It seems to parse correctly with ElementTree:
>>> from xml.etree import ElementTree as ET
>>> e =  ET.fromstring("""
... <cities>
...   <city>
...     <name>Tampa</name>
...     <description>A great city ^^ and place to live</description>
...   </city>
...   <city>
...     <name>Clearwater</name>
...     <description>Beautiful beaches</description>
...   </city>
... </cities>
... """)
>>> print ET.tostring(e)
<cities>
  <city>
    <name>Tampa</name>
    <description>A great city ^^ and place to live</description>
  </city>
  <city>
    <name>Clearwater</name>
    <description>Beautiful beaches</description>
  </city>
</cities>
>>>

Do you have invalid characters? unclosed tags?  The solution to each of these
problems is different.  More info will solicit better solutions.

-Chris

On Fri, Jan 05, 2007 at 01:50:18PM -0800, scott at crybabymaternity.com wrote:
> I've got an XML feed from a vendor that is not well-formed, and having
> them change it is not an option.  I'm trying to figure out how to
> create an error-handler that will ignore the invalid token and continue
> on.
> 
> The file is large, so I'd prefer not to put it all in memory or save it
> off and strip out the bad characters before I parse it.
> 
> I've included one of the problematic characters in a small XML snippet
> below.
> 
> I'm new to Python, and I don't know how to accomplish this. Any help is
> greatly appreciated!
> 
> -----------------------------------------------------------------
> 
> Here is my code:
> 
> from xml.sax import make_parser
> from xml.sax.handler import ContentHandler
> import StringIO
> 
> class ErrorHandler:
>     def __init__(self, parser):
>         self.parser = parser
>     def warning(self, msg):
>         print '*** (ErrorHandler.warning) msg:', msg
>     def error(self, msg):
>         print '*** (ErrorHandler.error) msg:', msg
>     def fatalError(self, msg):
>         print msg
> 
> class ContentHandler(ContentHandler):
>     def __init__ (self):
>         pass
>     def startElement(self, name, attrs):
>         pass
>     def characters (self, ch):
>         pass
>     def endElement(self, name):
>         pass
> 
> xmlstr = """
> <cities>
>   <city>
>     <name>Tampa</name>
>     <description>A great city  and place to live</description>
>   </city>
>   <city>
>     <name>Clearwater</name>
>     <description>Beautiful beaches</description>
>   </city>
> </cities>
> """
> parser = make_parser()
> curHandler = ContentHandler()
> errorHandler = ErrorHandler(parser)
> parser.setContentHandler(curHandler)
> parser.setErrorHandler(errorHandler)
> parser.parse(StringIO.StringIO(xmlstr))
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list


From __peter__ at web.de  Fri Jan 12 03:27:06 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 12 Jan 2007 09:27:06 +0100
Subject: Python nuube needs Unicode help
References: <1168550894.155528.295700@p59g2000hsd.googlegroups.com>
Message-ID: <eo7goj$n4s$03$1@news.t-online.com>

gheissenberger at gmail.com wrote:

> HELP!
> Guy who was here before me wrote a script to parse files in Python.
> 
> Includes line:
> print u

According to your other posts 'u' seems to be an instance of a custom
Utterance class with a __str__() method that accidentally returns unicode.
Try changing the print statement to

print unicode(u)

If you're lucky, it works. Otherwise we need a piece of the actual code. To
give you an idea what a self-contained demonstration of your problem might
look like:

>>> class Utterance(object):
...     def __str__(self): return u"???"
...
>>> u = Utterance()
>>> print u
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-2:
ordinal not in range(128)
>>> print unicode(u)
???

Peter


From smithj at rpath.com  Fri Jan  5 12:35:51 2007
From: smithj at rpath.com (Jonathan Smith)
Date: Fri, 05 Jan 2007 12:35:51 -0500
Subject: Dividing integers...Convert to float first?
In-Reply-To: <459E8B5C.6020804@gmx.net>
References: <1168017342.255981.134400@11g2000cwr.googlegroups.com>
	<459E8B5C.6020804@gmx.net>
Message-ID: <459E8C77.3020603@rpath.com>

Thomas Ploch wrote:
> redefined.horizons at gmail.com schrieb:
>> I'm still pretty new to Python. I'm writing a function that accepts
>> thre integers as arguments. I need to divide the first integer by te
>> second integer, and get a float as a result. I don't want the caller of
>> the function to have to pass floats instead of integers. How do I
>> convert the arguments passed to the function into floats before I do
>> the division? Is this necessary, or is their a better way?
>>
>> Thanks,
>>
>> Scott Huey
>>
> 
> Yes, it is necessary. If you divide two integers, the result will be an
> integer.
> 
>  >>> 1/2
>  0
> 
> You need the function float() -> float because a division between
> integers and floats will have floats as their results
> 
>  >>> float(1)/2
>  0.5


 >>> from __future__ import division
 >>> 1/2
0.5

-smithj


From gatti at dsdata.it  Thu Jan 25 05:47:44 2007
From: gatti at dsdata.it (gatti at dsdata.it)
Date: 25 Jan 2007 02:47:44 -0800
Subject: Do I need Python to run Blender correctly?
In-Reply-To: <tRZth.2027$pH3.140@newsfe12.phx>
References: <tRZth.2027$pH3.140@newsfe12.phx>
Message-ID: <1169722064.189055.61620@v45g2000cwv.googlegroups.com>

On Jan 25, 9:25 am, "AKA gray asphalt" <goodidea1... at hotmail.spam.com>
wrote:
> I downloaded Blender but there was no link for python. Am I on the right
> track?

Don't worry, Blender includes its own bundled Python interpreter, which
is usually one version behind; just leave it alone.

Lorenzo Gatti



From scott at crybabymaternity.com  Fri Jan  5 16:50:18 2007
From: scott at crybabymaternity.com (scott at crybabymaternity.com)
Date: 5 Jan 2007 13:50:18 -0800
Subject: Newbie XML SAX Parsing: How do I ignore an invalid token?
Message-ID: <1168033818.692201.183790@11g2000cwr.googlegroups.com>

I've got an XML feed from a vendor that is not well-formed, and having
them change it is not an option.  I'm trying to figure out how to
create an error-handler that will ignore the invalid token and continue
on.

The file is large, so I'd prefer not to put it all in memory or save it
off and strip out the bad characters before I parse it.

I've included one of the problematic characters in a small XML snippet
below.

I'm new to Python, and I don't know how to accomplish this. Any help is
greatly appreciated!

-----------------------------------------------------------------

Here is my code:

from xml.sax import make_parser
from xml.sax.handler import ContentHandler
import StringIO

class ErrorHandler:
    def __init__(self, parser):
        self.parser = parser
    def warning(self, msg):
        print '*** (ErrorHandler.warning) msg:', msg
    def error(self, msg):
        print '*** (ErrorHandler.error) msg:', msg
    def fatalError(self, msg):
        print msg

class ContentHandler(ContentHandler):
    def __init__ (self):
        pass
    def startElement(self, name, attrs):
        pass
    def characters (self, ch):
        pass
    def endElement(self, name):
        pass

xmlstr = """
<cities>
  <city>
    <name>Tampa</name>
    <description>A great city 
 and place to live</description>
  </city>
  <city>
    <name>Clearwater</name>
    <description>Beautiful beaches</description>
  </city>
</cities>
"""
parser = make_parser()
curHandler = ContentHandler()
errorHandler = ErrorHandler(parser)
parser.setContentHandler(curHandler)
parser.setErrorHandler(errorHandler)
parser.parse(StringIO.StringIO(xmlstr))



From mike.klaas at gmail.com  Thu Jan 25 01:00:53 2007
From: mike.klaas at gmail.com (Klaas)
Date: 24 Jan 2007 22:00:53 -0800
Subject: The reliability of python threads
In-Reply-To: <7x8xfr6h0j.fsf@ruckus.brouhaha.com>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169683654.672020.136820@q2g2000cwa.googlegroups.com>
	<7xveiwklt0.fsf@ruckus.brouhaha.com>
	<1169687269.885833.285410@a34g2000cwb.googlegroups.com>
	<7x8xfr6h0j.fsf@ruckus.brouhaha.com>
Message-ID: <1169704852.974111.51380@q2g2000cwa.googlegroups.com>

On Jan 24, 5:18 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "Klaas" <mike.kl... at gmail.com> writes:
> > CPython is more that "a particular implementation" of python,

> It's precisely a particular implementation of Python.  Other
> implementations include Jython, PyPy, and IronPython.

I did not deny that it is an implementation of Python.  I deny that it
is but an implementation of Python.

Jython: several versions behind, used primariy for interfacing with
java
PyPy: years away from being a practical platform for replacing CPython
IronPython: best example you've given, but still probably three or four
orders of magnitude less significant that CPython

> >  and the GIL is more than an "artifact".  It is a central tenet of
> > threaded python programming.

> If it's a central tenet of threaded python programming, why is it not
> mentioned at all in the language or library manual?

The same reason why IE CSS quirks are not delineated in the HTML 4.01
spec.  This doesn't mean that they aren't central to css web
programming (they are).

How could the GIL, which limits the number of threads in which python
code can be run in a single process to one, NOT be a central part of
threaded python programming?

> The threading
> module documentation describes the right way to handle thread
> synchronization in Python, and that module implements traditional
> locking approaches without reference to the GIL.

No-one has argued that the GIL should be used instead of
threading-based locking.  How could they? The two concepts are not
interchangeable and while they affect each other, are two different
things entirely.  In the post you responded to and quoted I said:

> > I don't advocate relying on the GIL to manage shared data when
> > threading, 

-Mike



From techtonik at gmail.com  Wed Jan 24 05:50:44 2007
From: techtonik at gmail.com (techtonik)
Date: 24 Jan 2007 02:50:44 -0800
Subject: Q: Why Python is bad for web from the point of URLs?
Message-ID: <1169635844.254229.310460@a75g2000cwd.googlegroups.com>

A: Because you need three modules to parse, edit and reassemble query
string. urlparse, cgi and urllib



From gagsl-py at yahoo.com.ar  Wed Jan 24 13:05:11 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 24 Jan 2007 15:05:11 -0300
Subject: Thoughts on using isinstance
In-Reply-To: <1169659264.605545.211000@s48g2000cws.googlegroups.com>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<mailman.3077.1169645738.32031.python-list@python.org>
	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>
	<mailman.3087.1169652310.32031.python-list@python.org>
	<1169656371.689791.216360@v33g2000cwv.googlegroups.com>
	<pan.2007.01.24.16.49.21.555688@gmx.net>
	<1169659264.605545.211000@s48g2000cws.googlegroups.com>
Message-ID: <7.0.1.0.0.20070124144844.05aebd88@yahoo.com.ar>

At Wednesday 24/1/2007 14:21, abcd wrote:

> >Yes because usually you don't expect a list or dictionary but some object
> > that *acts* like a list or dictionary.  Or you even expect just some
> > aspects of the type's behavior.  For example that it is something you can
> > iterate over.
> >
> > Ciao,
> >         Marc 'BlackJack' Rintsch
>
>good point.  is there place that documents what methods/attrs I should
>check for on an object?  for example, if its a list that I expect I
>should verify the object that is passed in has a ??? function? etc.

Don't insist on checking! :)
Just try to use the object - you'll get an exception at first invalid usage.

By example, a lot of functions take a file parameter to output 
something on it. Usually the *only* method called is write(). So any 
object with a write() method (taking a single string argument) would 
be fine; StringIO are an example. Checking if the argument is an 
instance of the file type would make that impossible.
Anyway, sometimes it's ok to check in advance - but please consider 
to check the *behavior* you expect, not the exact instance type. In 
the example above, you can validate that fileobject has a write 
attribute: getattr(fileobject, "write"). But I'd only do that if I 
have a good reason (perhaps if the file is used after some lengthy 
calculation,and I want to be sure that I will be able to store the result)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From bearophileHUGS at lycos.com  Thu Jan 25 04:51:56 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 25 Jan 2007 01:51:56 -0800
Subject: Fast Imaging for Webserver
In-Reply-To: <1169712298.439101.171730@l53g2000cwa.googlegroups.com>
References: <1169707586.701908.32860@v45g2000cwv.googlegroups.com>
	<1169712298.439101.171730@l53g2000cwa.googlegroups.com>
Message-ID: <1169718716.772895.220490@v45g2000cwv.googlegroups.com>

Paul McGuire:
> before you start replacing PIL, or
> optimizing CherryPy, or other possible performance-improving efforts,
> you should profile the within-request processing, find the bottleneck,
> and take care of that first.

Good advice.
Among the tests, the OP can also try to change the antialiasing type of
PIL, going to the nearest neighbor, and doing some transfer timings
again. It may help find where the bottleneck is.

Bye,
bearophile



From vinay_sajip at yahoo.co.uk  Tue Jan 23 05:01:24 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: 23 Jan 2007 02:01:24 -0800
Subject: selective logger disable/enable
References: <1169190498.593059.238150@q2g2000cwa.googlegroups.com>
	<1169204564.348768.186900@38g2000cwa.googlegroups.com>
	<1169349399.938121.238430@38g2000cwa.googlegroups.com>
	<1169395276.181654.160810@a75g2000cwd.googlegroups.com>
	<1169437763.213781.163660@38g2000cwa.googlegroups.com>
	<1169442596.209314.162410@s34g2000cwa.googlegroups.com>
	<1169531341.221067.205500@11g2000cwr.googlegroups.com>
Message-ID: <1169546484.370874.253890@a75g2000cwd.googlegroups.com>

Gary Jefferson wrote:

> Vinay Sajip wrote:
> >
> > BTW I would also advise reading PEP-282 to understand more about the
> > logging approach.
>
>
> You've been most helpful, Vinay.  The PEP section on Filters states
> that I can do what I've been trying to do with filters, but doesn't
> provide enough information to do it (or, at least, I'm too thick to
> guess at how it would work by looking at the API and PEP and trying a
> dozen different ways).  Luckily, the examples you point to from your
> original package do provide enough info; log_test15.py held the key.
>
> I still feel like it would be more intuitive if filters were inherited
> down the hierarchy instead of having to go through the extra steps of
> getting at the root handler first, but I'm sure there are good reasons
> for not doing this.
>
> One more question, is there any way to get the list of all named
> loggers (from the Manager, perhaps)?  Or... maybe I don't need this,
> either, as MatchFilter (log_test18.py) seems to do what I was thinking
> I need the list of logger names for... most excellent.
>
> Thanks,
> Gary
>
> BTW, the python logging module is one of the best readily available
> loggers I've come across in any language.

Thanks. Glad the tests/examples (log_testxx.py) helped. When I get a
chance, I will try to work some of them into the docs...

Best regards,


Vinay Sajip



From indy90 at gmail.com  Thu Jan 25 16:27:53 2007
From: indy90 at gmail.com (Indy)
Date: Thu, 25 Jan 2007 23:27:53 +0200
Subject: Fwd: asyncore.dispatcher.handle_read
In-Reply-To: <725281c20701251327n761a2c15ib34788b613f3932f@mail.gmail.com>
References: <mailman.3158.1169745496.32031.python-list@python.org>
	<1169748481.260540.58640@k78g2000cwa.googlegroups.com>
	<725281c20701251327n761a2c15ib34788b613f3932f@mail.gmail.com>
Message-ID: <725281c20701251327o7dd32093q209bcd6c29627386@mail.gmail.com>

---------- Forwarded message ----------
From: Indy <indy90 at gmail.com>
Date: Jan 25, 2007 11:27 PM
Subject: Re: asyncore.dispatcher.handle_read
To: Jordan <jordan.taylor2 at gmail.com>


OK, problem fixed. Thanks anyway :-)

On 25 Jan 2007 10:08:01 -0800, Jordan <jordan.taylor2 at gmail.com> wrote:
> That was not entirely helpful, it's way more likely a mistake you made
> in subclassing dispatcher than a problem within asycore itself (that
> ended up sounding a lot more mean/angry than intended, sorry ?_? ),
> you really need to show us what changes you made to asyncore.dispatcher
> if you want help.  Good luck.
>
> Cheers,
> Jordan
>
> On Jan 25, 12:18 pm, Indy <ind... at gmail.com> wrote:
> > Greetings.
> >
> > I am writing an asynchronous server, and I use the standard library's
> > module asyncore.
> > I subclass asyncore.dispatcher. handle_accept works just right, that
> > is, when a client socket makes a request to connect to my server
> > socket, things that I set in handle_accept definition, happen. So, it
> > is OK. But, the problem is that handle_read does not work as expected.
> > Things I set in handle_read definition, do not happen when a client
> > socket sends me data. Why? Is this a known problem? Please, can you
> > help me?
> > Thanks a lot, in advance.
> >
> > Best regards,
> > Aristotelis Mikropoulos
> >
> > --
> > Programs must be written for people to read, and only incidentally for
> > machines to execute.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


--
Programs must be written for people to read, and only incidentally for
machines to execute.


-- 
Programs must be written for people to read, and only incidentally for
machines to execute.


From horpner at yahoo.com  Thu Jan  4 13:13:10 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 4 Jan 2007 19:13:10 +0100
Subject: Sorting on multiple values, some ascending, some descending
References: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
	<slrnepqajt.t4.horpner@FIAD06.norwich.edu>
	<enjbso$aot$02$1@news.t-online.com>
Message-ID: <slrnepqh1c.u0.horpner@FIAD06.norwich.edu>

On 2007-01-04, Peter Otten <__peter__ at web.de> wrote:
> Neil Cerutti wrote:
>> Another trick is to factor the key application out of the
>> sort. This may be a good idea if when you want to minimize the
>> number of times your key function is called.
>> 
>> The idea is to mangle the list temporarily so you can use an
>> unkeyed sort, and then unmangle the sorted data. Here's a
>> silly example using a phone directory that's not stored in a
>> format that's easy to sort.
>
> No need to jump through these hoops; list.sort(key=keyfunc)
> calls keyfunc() exactly once per list item:
>
>>>> from random import shuffle
>>>> items = range(-5, 10)
>>>> shuffle(items)
>>>> count = 0
>>>> def key(value):
> ...     global count
> ...     count += 1
> ...     return abs(value)
> ...
>>>> items.sort(key=key)
>>>> count
> 15

Thanks for the correction! That's very useful information.

-- 
Neil Cerutti


From S.Mientki-nospam at mailbox.kun.nl  Wed Jan  3 14:50:54 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Wed, 03 Jan 2007 20:50:54 +0100
Subject: list/dictionary as case statement ?
In-Reply-To: <qhtnp25ulug79cg2d1mebucg2g6pd11ift@4ax.com>
References: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
	<mailman.2232.1167806595.32031.python-list@python.org>
	<71pmp2tq1klma5urhkfiv8bpq6u8sgtj06@4ax.com>
	<501r8sF1dp76aU1@mid.individual.net>
	<qhtnp25ulug79cg2d1mebucg2g6pd11ift@4ax.com>
Message-ID: <d47be$459c090d$d443bb3a$9391@news.speedlinq.nl>

Tom Plunket wrote:
> Bjoern Schliessmann wrote:
> 
>> Intels aren't RISC, are they?
> 
> Not the ones in PCs.  The OP didn't specify the CPU that's being used,
> however.
> 
Well it was meant for a small micro-controller, the PIC-14-series,
e.g. PIC16F877.

I already build a simulator for this device in  Delphi,
but it seemed a nice idea, and a good exercise for me,
to see how this could be done in Python.

And thanks to you all,
I've the core (not the pheripherals) working now,
and my experience with Python are very positive.

The main advantages of the simulator in Python are:
   - very elegant and lean code
   - the treshold of Python is much lower
     (in my opinion, simulators only live when more people are involved)
The main disadvantages (I think, not yet tested)
   - the speed is much lower
   - the GUI is much more complex

For those who are interested,

The rough code of the Python code can be seen here
(I might have committed a mortal sin, by changing "self" into "S" ??)
   http://oase.uci.kun.nl/~mientki/download/cpu2.txt
btw, as I'm a total newbie, any comment is welcome !!

The Delphi simulator can be seen here
   http://oase.uci.kun.nl/~mientki/data_www/pic/jalss/jalss.html

thanks again,
for all your fast and very adequate responses !!

cheers,
Stef Mientki


From gagsl-py at yahoo.com.ar  Tue Jan 23 21:33:12 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 23 Jan 2007 23:33:12 -0300
Subject: Python does not play well with others
In-Reply-To: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
Message-ID: <7.0.1.0.0.20070123232314.03588c40@yahoo.com.ar>

At Tuesday 23/1/2007 22:50, John Nagle wrote:

>    The major complaint I have about Python is that the packages
>which connect it to other software components all seem to have
>serious problems.  As long as you don't need to talk to anything
>outside the Python world, you're fine.  But once you do, things
>go downhill.

That appears to be your situation.

>MySQLdb has version and platform compatibility
>problems.

Which, specifically?

>So does M2Crypto.

Both of them are third-party libraries maintained by volunteer people 
(and I could ask why do you menction M2Crypto specifically?)

>The built-in SSL support is weak.
>Even basic sockets don't quite work right; the socket module
>encapsulates the timeout mechanism but doesn't get it right.

I use several packages connecting to the "outside Python" world 
without problems. If you have these specific problems, perhaps you 
could try to fix them? Get funding to make them fixed? Do the funding yourself?

>    In the Perl, Java, PHP, and C/C++ worlds, the equivalent
>functions just work.   That's because, in those worlds, either the
>development team for the language or the development team
>for the subsystem takes responsibility for making them work.
>Only Python doesn't do that.

I think that it was done because *someone* was sponsoring the 
development (like IBM, Sun, and others).


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From rw at smsnet.pl  Wed Jan 24 16:19:28 2007
From: rw at smsnet.pl (Rob Wolfe)
Date: Wed, 24 Jan 2007 22:19:28 +0100
Subject: module email
References: <ep7vuk$235b$1@news.rtcomm.ru>
Message-ID: <874pqgf7hb.fsf@smsnet.pl>

"Sergey Dorofeev" <sergey at fidoman.ru> writes:

> Hello.
>
> Why does not work?

[...]

> m=email.message.Message()

[...]

> p2=email.message.Message()
> p2.set_type("message/rfc822")
> p2.set_payload(m)

Payload is a _list_ of Message objects (is_multipart() == True)
or a _string_ object (is_multipart() == False) but never just Message object.

http://docs.python.org/lib/module-email.message.html

-- 
HTH,
Rob


From danb_83 at yahoo.com  Sat Jan 13 13:52:05 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 13 Jan 2007 10:52:05 -0800
Subject: HTML Calendar code
In-Reply-To: <0001HW.C1CED6FB000CC50DF0407648@News.Individual.DE>
References: <0001HW.C1CED6FB000CC50DF0407648@News.Individual.DE>
Message-ID: <1168714324.437746.272060@l53g2000cwa.googlegroups.com>

On Jan 13, 11:35 am, Kajsa Anka <bluej... at mac.com> wrote:
> Before I re-invent something I would like to ask if there exists some code
> that can be used for create the HTML code for a calendar which I then can
> include on a web page.
>
> The module in the standard library can create a calendar but I would like
> display my schedule.
>
> My idea is that it would read a simple text file and then create a weekly
> calendar view (and/or a monthly) with my schedule.
>
> Does some the code for this exist? (the ones I found all created calendars
> but doesn't seem to include any schedule)

Here's most of a monthly calendar CGI script I wrote a couple of years
ago.  Modify it to your needs.

# ------------ CONSTANTS ------------

MONTH_NAMES = (None, # Use 1-based indexing
               'January', 'February', 'March', 'April', 'May', 'June',
'July',
               'August', 'September', 'October', 'November',
'December')

DAY_NAMES = ('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday',
'Friday',
             'Saturday')

# ------------ DATABASE FUNCTIONS ------------

official_events = shelve.open('../data/calendar/official.shelf')
unofficial_events = shelve.open('../data/calendar/unofficial.shelf')

def get_events(year, month, day):
   key = '%04d-%02d-%02d' % (year, month, day)
   events = official_events.get(key, [])
   if common.user and common.user.permissions.calendar_u:
      events += unofficial_events.get(key, [])
   return events

# ------------ CALCULATION FUNCTIONS ------------

def is_leap_year(year):
   return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0)

def days_in_month(month, year):
   if month == 2:
      if is_leap_year(year):
         return 29
      else:
         return 28
   elif month in (4, 6, 9, 11):
      return 30
   else:
      return 31

# ------------ DISPLAY FUNCTIONS ------------

def get_links(year, month):
   "Return URLs for previous month and next month."
   old_year = year
   old_month = month - 1
   if old_month == 0:
      old_month = 12
      old_year -= 1
   left_link = 'calendar.py?year=%d&amp;month=%d' % (old_year,
old_month)
   new_year = year
   new_month = month + 1
   if new_month == 13:
      new_month = 1
      new_year += 1
   right_link = '?year=%d&amp;month=%d' % (new_year, new_month)
   return left_link, right_link

def print_navigation(year, month):
   prev_link, next_link = get_links(year, month)
   document.write('<table class="navigation"><tr>')
   document.write('<td class="prev_link">')
   document.write('<a href="%s">&larr; previous month</a>' % prev_link)
   document.write('</td><td class="next_link">')
   document.write('<a href="%s">next month &rarr;</a>' % next_link)
   document.write('</td></tr></table>')

def print_day_names():
   document.write('<tr>')
   for day in DAY_NAMES:
      document.write('<th class="dayname">%s</th>' % day)
   document.write('</tr>')

def print_calendar(year, month):
   document.write('<h2>%s %d</h2>' % (MONTH_NAMES[month], year))
   print_navigation(year, month)
   document.write('<table class="calendar">')
   print_day_names()
   days = days_in_month(month, year)
   start_offset = (datetime.date(year, month, 1).weekday() + 1) % 7
   document.write('<tr class="week">')
   for i in xrange(start_offset):
      document.write('<td class="invalid" />')
   column = start_offset
   for day in xrange(1, days+1):
      events = get_events(year, month, day)
      if events:
         document.write('<td class="event">')
         document.write(str(day))
         document.write('<ul>')
         for event in events:
            document.write('<li>%s</li>' % cgi.escape(event))
         document.write('</ul></td>')
      else:
         document.write('<td class="noevent">%d</td>' % day)
      column += 1
      if column == 7 and day != days:
         document.write('</tr><tr class="week">')
         column = 0
   for i in xrange((7 - column) % 7):
      document.write('<td class="invalid" />')
   document.write('</tr></table>')

# ------------ MAIN PROGRAM ------------

current_date = datetime.date.today()
form = cgi.FieldStorage()

try:
   year = int(form['year'].value)
except:
   year = current_date.year

try:
   month = int(form['month'].value)
except:
   month = current_date.month
if month < 1 or month > 12:
   month = current_date.month

common.print_header('Calendar')
document.write_txt2tags_file('../data/text/intro_calendar')
print_calendar(year, month)
common.print_footer()



From mclaugb at nospm.yahoo.com  Sat Jan 20 19:17:50 2007
From: mclaugb at nospm.yahoo.com (mclaugb)
Date: Sun, 21 Jan 2007 00:17:50 -0000
Subject: scipy.optimize.lbfgsb help please!!!
References: <eotep7$ik$1@gemini.csx.cam.ac.uk>
	<mailman.2953.1169333789.32031.python-list@python.org>
Message-ID: <eoubge$pvi$1@gemini.csx.cam.ac.uk>

Just to clarify--this is a multivariate algorithm.  I changed the function 
Permmin to simply take the absolute value of (xmin, ymin) so that it returns 
one value.  Unfortunately, the error remains--it still returns this error:

" x, f, d = lbfgsb.fmin_l_bfgs_b(Permmin, x0, Jacobi, params, 
bounds=[(.001,100),(-50,-.001)] , maxfun=500)
  File "C:\Python24\lib\site-packages\scipy\optimize\lbfgsb.py", line 197, 
in fmin_l_bfgs_b
    isave, dsave)
ValueError: failed to initialize intent(inout) array -- expected elsize=8 
but got 4 -- input 'l' not compatible to 'd'"



"Robert Kern" <robert.kern at gmail.com> wrote in message 
news:mailman.2953.1169333789.32031.python-list at python.org...
> mclaugb wrote:
>> Does anyone out there have a piece of code that demonstrates the use of 
>> the
>> lbfgsb multivariate, bounded solver in the scipy.optimize toolkit?  An
>> example would get me started because my code below does not seem to work.
>
> You will probably get better/faster/more answers on the scipy-user mailing 
> list.
>
>  http://www.scipy.org/Mailing_Lists
>
>> Permmin is a function that simply returns a vector array [xmin, ymin]
>
> This is your problem. The function to minimize must return a scalar, not a
> vector. This is not a multi-objective optimizer.
>
> -- 
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless 
> enigma
> that is made terrible by our own mad attempt to interpret it as though it 
> had
> an underlying truth."
>  -- Umberto Eco
> 




From no-spam at no-spam-no-spam.invalid  Wed Jan 17 16:37:54 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 17 Jan 2007 22:37:54 +0100
Subject: Making a simple script standalone
In-Reply-To: <5d1084-5j7.ln1@whisper.very.softly>
References: <5d1084-5j7.ln1@whisper.very.softly>
Message-ID: <eom4u8$itp$1@news.albasani.net>

Rikishi 42 wrote:
> Hi,
> I'm new to this group. I've tried finding my answer in existing messages,
> but no such luck.
> 
> What I want to do is to compile/bundle/prepare/whatever_term a simple
> Python script for deployment on a Windows machine. Installing Python
> itself on that machine, is not an option. Ideally I would like to obtain
> a single executable file, but a script+runtime is acceptable.
> 
> There is nothing graphical, nothing fancy about the script.
> The only imports are: os, stat, string and time.
> 
> 
> Any suggestions on an - easy and clear - path to follow ?
> 
> 

cx_Freeze was not mentioned so far. its perhaps most easy and clear.


Robert




From http  Mon Jan 22 16:37:04 2007
From: http (Paul Rubin)
Date: 22 Jan 2007 13:37:04 -0800
Subject: AES and Credit card number encryption
References: <45b5159e$0$24377$88260bb3@free.teranews.com>
Message-ID: <7xy7nu4ubj.fsf@ruckus.brouhaha.com>

Tobiah <toby at tobiah.org> writes:
> I browsed this subject and thought I might use the 'AES' cypher
> scheme to do this.  Would this be a good choice?

There's more to it than that, but yes, AES is a good underlying
algorithm.

> So my real question is, how do I go about generating the best key.
> Isn't the length supposed to be a 2^n bits, and soforth?

AES key length is your choice of 128, 192, or 256 bits.  In practice
128 bits (16 bytes) is fine and is what most people use.  You should
use 16 completely random bytes.  Get these by reading them from
os.urandom(16), which is provided for basically this purpose.


From steve at holdenweb.com  Sun Jan 28 04:51:07 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 28 Jan 2007 09:51:07 +0000
Subject: Crunchy 0.8 release
In-Reply-To: <1169932766.450129.259840@k78g2000cwa.googlegroups.com>
References: <1169932766.450129.259840@k78g2000cwa.googlegroups.com>
Message-ID: <45BC720B.5010909@holdenweb.com>

Andr? wrote:
> Version 0.8 of Crunchy has been released.  It is available on
> http://code.google.com/p/crunchy/
> 
> Crunchy, the Interactive Python Tutorial Maker, is an application that
> transforms an ordinary html-based Python tutorial into an interactive
> session within a web browser.  Currently, only Firefox is supported.
> Crunchy is developed and tested on Windows XP and Ubuntu Dapper Drake,
> but should work on any suitable windows or UNIX system.
> 
> Three major improvements have been made since version 0.7 had been 
> released.
> 
> 1. New editor
> 
> Instead of a simple html textarea, Crunchy now gives the option of
> using a "real" editor, namely EditArea
> (http://www.cdolivet.net/editarea/).  EditArea support syntax coloring
> and allows loading and saving local Python files among other features.
>  Within Crunchy, it is set up so that the tab key is translated into 4
> spaces.
> 
> 2. Language support
> 
> Crunchy now supports English and French, through the use of ".po"
> files.  When running Python code, some error messages have been
> adapted/translated.  EditArea itself support more languages
> (currently: Danish, Dutch, English, French, German, Italian, Japanese,
> Polish, Portuguese).
> 
> 3. Graphical tutorial converter.
> 
> Crunchy uses some supplementary markup to transform html files into
> interactive tutorials.  Whereas previous versions required a tutorial
> maker to edit an html file "by hand", version 0.8 includes a tutorial
> editor: with a few clicks, you can easily add to an html file the
> chosen interactive elements and options for Crunchy.
> 
> In addition to the above major improvements, the code has been
> refactored significantly and a number of small bug fixes have been
> made.  Crunchy will be demonstrated at the upcoming Pycon 2007.
> 
> Andr? Roberge and Johannes Woolard.
> 
Very nice indeed, and a significant advance over 0.7 - I'll be trying to 
write Crunchy presentations myself (though possibly not as soon as PyCon).

I found it a little strange that the top-level directory in the 
distribution is called "andre" rather than "crunchy", but that's a very 
minor point.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com


From nagle at animats.com  Fri Jan 12 23:23:33 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 13 Jan 2007 04:23:33 GMT
Subject: Wierd M2Crypto bug - phony "peer did not return certificate" error
In-Reply-To: <ifWdndyBIoM3rTXYnZ2dnUVZ_oSdnZ2d@comcast.com>
References: <YK%oh.17173$sR.6972@newssvr29.news.prodigy.net>
	<ovWdnZTGuYL38jjYnZ2dnUVZ_rqdnZ2d@comcast.com>
	<1168543799.097737.127930@i56g2000hsf.googlegroups.com>
	<ZsednYtgeIfeVTvYnZ2dnUVZ_hydnZ2d@comcast.com>
	<CoFph.33142$Gr2.8155@newssvr21.news.prodigy.net>
	<N3Gph.15737$Gw4.6586@newssvr23.news.prodigy.net>
	<ifWdndyBIoM3rTXYnZ2dnUVZ_oSdnZ2d@comcast.com>
Message-ID: <99Zph.19734$yC5.6287@newssvr27.news.prodigy.net>

Heikki Toivonen wrote:
> John Nagle wrote:
> 
>>def connect(self, addr):
>>    self.socket.connect(addr)
>>    self.addr = addr
>>    self.socket.settimeout(None) # Back to normal timeout (NEW)
> 
> 
> I am not sure if this is always appropriate. In fact, doesn't this just
> eliminate the timeout completely from this connection?
> 
> In your case you could achieve what you want by calling
> connection_object.socket.settimeout(4.0) method just before calling
> connect, without needing to edit M2Crypto itself.

    No, this actually works right.  It seems that the default timeout
controls the timeout on TCP connect, but puts the socket into
non-blocking mode.  So, if as soon as a TCP connection is
opened, but before the SSL handshake starts, the socket timeout
is set to None, then the socket returns to blocking mode before
its first read.

    At least on Windows.  More later on how this works on Linux.

				John Nagle


From eight02645999 at yahoo.com  Fri Jan 19 23:40:24 2007
From: eight02645999 at yahoo.com (eight02645999 at yahoo.com)
Date: 19 Jan 2007 20:40:24 -0800
Subject: regexp qns
Message-ID: <1169268024.164643.71320@l53g2000cwa.googlegroups.com>

hi
suppose i have a string like

test1?test2t-test3*test4*test5$test6#test7*test8

how can i construct the regexp to get test3*test4*test5 and
test7*test8, ie, i want to match * and the words before and after?
thanks



From tjgolden at gmail.com  Wed Jan 17 05:36:25 2007
From: tjgolden at gmail.com (Tim Golden)
Date: 17 Jan 2007 02:36:25 -0800
Subject: Check a windows service
In-Reply-To: <1168985869.099273.13630@38g2000cwa.googlegroups.com>
References: <1168966952.965088.17740@l53g2000cwa.googlegroups.com>
	<1168967374.568967.173690@11g2000cwr.googlegroups.com>
	<1168985869.099273.13630@38g2000cwa.googlegroups.com>
Message-ID: <1169030185.707886.229920@51g2000cwl.googlegroups.com>

awel wrote:
> Sorry, but could you give me an example with a real service 'cause I've
> tried this script but nothings happened, no error, nothings ; even if I
> launch it in cmd prompt.

Well, as that example said, it was designed to show
automatic services which are not running. If you don't
have any then nothing will show. I assumed you could
use this as a starting point.

To list all services try this:

<code>
import wmi

c = wmi.WMI ()
for service in c.Win32_Service ():
  print service.Caption

</code>

To show a specific service:

<code>
import wmi

c = wmi.WMI ()
for service in c.Win32_Service (Caption="Task Scheduler"):
  print service

</code>

TJG



From grahn+nntp at snipabacken.dyndns.org  Tue Jan  9 07:07:10 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 9 Jan 2007 12:07:10 GMT
Subject: Execute binary code
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<1168288176.054142.232780@s80g2000cwa.googlegroups.com>
Message-ID: <slrneq6vga.tcj.grahn+nntp@frailea.sa.invalid>

On 8 Jan 2007 12:29:36 -0800, olsongt at verizon.net <olsongt at verizon.net> wrote:
>
> citronelu at yahoo.com wrote:
>> Is it possible to execute a binary string stored within a python script
>> as executable code ?
>>
>> The script is run under Windows, and the binary code (a full executable
>> file) is stored in a variable in the script.
>>
>> I know I can use os.system() or os.popen() to run an external file, but
>> these functions take as argument a string evaluated as command-line.
>>
>> I also know I could save the binary code as a temporary file, execute
>> it and delete it afterwards, but this is not an alternative.
>>
>> Thanks.
>
> It's not impossible, that's basically what I did on a smaller scale in
> pyasm:

For what it's worth[1], under Unix it /is/ impossible. The only way to bring in
new code (short of dynamic libraries) is to call exec(2) or its variations,
and all need a file system object to load the code from.

/Jorgen
[1] Not much to the OP, I'd think.

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From webmaster at cacradicalgrace.org  Wed Jan  3 16:51:11 2007
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Wed, 03 Jan 2007 14:51:11 -0700
Subject: Unsubscribing from the list
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>	<ene064$bm5$1@sea.gmane.org>	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>	<enghj3$qhf$1@sea.gmane.org>	<880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com>	<engs22$6u3$1@sea.gmane.org>	<880dece00701031033o151cbe76h92a5a5adde51db90@mail.gmail.com>	<enh4g4$n0h$1@sea.gmane.org>
	<mailman.2254.1167857249.32031.python-list@python.org>
Message-ID: <enh8h6$5iu$1@aioe.org>

Nice move, using Perl/PHP for that.  It's always fun to piss people off
by apologizing. ;)

Cheers,
Cliff


Dotan Cohen wrote:
> On 03/01/07, Robert Kern <robert.kern at gmail.com> wrote:
>> He misunderstood you (as I nearly did, too). The way you phrased
>> "decided that
>> there was no futher interest on the page for me" is somewhat
>> ambiguous: it can
>> seem like it refers to the second time, not the first.
>>
> 
> Ah. Sorry. I'm getting better at confusing people :)
> 
> if ($you=="got_offended") {
>    $dotan="sorry";
> }
> 
> Dotan Cohen
> 
> http://what-is-what.com/what_is/website.html
> http://lyricslist.com/


From S.Mientki-nospam at mailbox.kun.nl  Wed Jan 17 17:46:49 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Wed, 17 Jan 2007 23:46:49 +0100
Subject: Anyone has a nice "view_var" procedure ?
In-Reply-To: <mailman.2823.1169032836.32031.python-list@python.org>
References: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>	<1168904865.253014.210140@m58g2000cwm.googlegroups.com>	<8ab5f$45ad5c12$d443bb3a$7243@news.speedlinq.nl>
	<mailman.2823.1169032836.32031.python-list@python.org>
Message-ID: <5d831$45aea748$d443bb3a$26464@news.speedlinq.nl>

hi Gabriel,

> It appears that you're a number crunching guy - you absolutely ignore 
> all types except numeric ones! :)
Is there anything else than numbers ? ;-)
But indeed I forgot the else statement, which should look like this:
   else:
     line = 'UNKNOWN: ' + type(V)
     print line
     line = '  ' + V.__repr__()
     # do something to prevent too long output sequences
     print line

> 
> 
>>      # count the occurances of the different types
>>      N_int,N_float,N_complex,N_list,N_tuple,N_array,N_unknown =
>> 0,0,0,0,0,0,0
> 
> Ouch, seven counters... your guts should be saying that this is 
> candidate for a more structured type... what about a dictionary indexed 
> by the element type?
> Using a dict:
> 
>      for item in V:
>         t = type(item)
>         try: count[t] = count[t]+1
>         except IndexError: count[t] = 1
Thanks very much, that's almost perfect, I only had to change IndexError into KeyError.
> 
> 
> We'll replace all of this with:
> 
>      for key,value in count:
>         line += ' %s=%d' % (key, value)
> 
I didn't succeed to use value as a enumerator, and I had to typecast key into a string (and skipping 
some redundant information, but then it works great, thanks !!
here the complete listing:
     count = {}
     for item in V:
       t = type(item)
       try: count[t] += 1
       except KeyError: count[t] = 1
     if type(V)==list: line = 'list:'
     else: line = 'tuple:'
     for key in count: line += '  %s=%d' %('N_'+str(key)[7:-2],count[key])
     print line

cheers,
Stef Mientki


From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 20 22:15:46 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 21 Jan 2007 14:15:46 +1100
Subject: Code reformater?
References: <poe3r2ha92p6vrhtk9b2piso337djv4boo@4ax.com>
	<eotjsg$ff68$1@zam602.zam.kfa-juelich.de>
	<mailman.2956.1169347902.32031.python-list@python.org>
Message-ID: <pan.2007.01.21.03.15.45.787139@REMOVE.THIS.cybersource.com.au>

On Sat, 20 Jan 2007 23:51:24 -0300, Gabriel Genellina wrote:

> As the indentation *is* significant in python, none of the above can 
> help if you lose the indentation. Try to reconstruct this:
> 
> def foo():
> if a>0:
> if b>0:
> print 1
> print 2
> else:
> return 3
> return 4
> 
> The tools may help to make the indentation consistent (tabs/8 
> spaces/4 spaces/2 spaces mixed) or look better, but not to make it right.


Sure -- but a heuristic that gets it right *sometimes* may still be
useful, provided the user knows that the code may not be indented
correctly.

There are lots of legal Python blocks where the indentation CAN be
reconstructed correctly, and only a relatively small proportion where it
can't -- the tool could do its best, and warn the user when there are
indents that can't be dealt with. Or even refuse the temptation to guess,
but re-indent whatever parts of the code it is sure about.

Still, it is better not to lose the indentation in the first place.



-- 
Steven.



From steve at REMOVE.THIS.cybersource.com.au  Thu Jan 25 05:58:43 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 25 Jan 2007 21:58:43 +1100
Subject: str and __setitem__
References: <Xns98C372B2DD26Btoreriknpolarno@129.242.5.222>
Message-ID: <pan.2007.01.25.10.58.42.167719@REMOVE.THIS.cybersource.com.au>

On Thu, 25 Jan 2007 10:16:31 +0000, Tor Erik Soenvisen wrote:

> Hi,
> 
> What do I need to do to make the code below work as expected:

Use another language *wink*

Python strings are immutable, you can't change them in place.

> class str2(str):
> 
> 	def __setitem__(self, i, y):
> 		assert type(y) is str
> 		assert type(i) is int
> 		assert i < len(self)
> 		self = self[:i] + y + self[1+i:]

This line rebinds a NEW string to the name "self" -- it doesn't change the
contents of the original string. Because the name self is local to the
method, it doesn't change references to the original string.

Are you sure you need mutable strings? 

Here are a few different ways of getting something like a mutable string:

* use the MutableString class from the UserString module;

* use the mmap module;

* use lists of characters instead of strings;


-- 
Steven



From gagsl-py at yahoo.com.ar  Thu Jan 11 00:32:49 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 02:32:49 -0300
Subject: IDLE Python and Environment Variables
In-Reply-To: <1168482248.828858.161320@i39g2000hsf.googlegroups.com>
References: <1168482248.828858.161320@i39g2000hsf.googlegroups.com>
Message-ID: <7.0.1.0.0.20070111021615.0585b8a8@yahoo.com.ar>

At Wednesday 10/1/2007 23:24, Tristan wrote:

>1)      For almost everyone, I execute a corresponding ".bat file" into
>
>which I define and/or include values for some "temporal"
>environment variables that let me find all the objects that the
>selected application uses. Sometimes I include in the .bat file the
>execution of the application, but generally I leave in a prompt status,
>
>ready to invoke python or some dos commands.

What kind of environment variables? Those used by Python itself, like 
PYTHONPATH? Or your own variables, like FOO_LOCATION=C:\My\Projects\Lib\Foo

>2)      When I close the command prompt window, there are no traces of
>my
>enviroment variables in my windows system (that is right). Only the
>default windows environment variables remain.
>
>I tried to do the same with the IDLE (and I imagine tha same occurs
>with Python command line), but I have the next problem:
>I can not find in IDLE (or another app?) the way to previously define
>and/or include automatically values for my "temporal" environment
>variables as I do in the .bat files.

So you write a .bat that:
- defines some variables
- calls your script.
It appears that your variables are some kind of configuration - in 
this case it has more sense to put such configuration in another 
place, like a config file, and forget about environment variables.
You can use the usual .ini Windows format and read it with 
ConfigParser. You can pass your script the name of the ini file to 
read - this would be the equivalent of using different .bat files to 
call the same script.
This way it doesn't matter whether you invoke your application using 
python command line, or inside IDLE, or inside another environment.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From nagle at animats.com  Mon Jan 15 12:25:17 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 15 Jan 2007 17:25:17 GMT
Subject: How naive is Python?
In-Reply-To: <mailman.2734.1168874010.32031.python-list@python.org>
References: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>	<mailman.2724.1168834095.32031.python-list@python.org>	<1168848408.785931.285160@q2g2000cwa.googlegroups.com>
	<mailman.2734.1168874010.32031.python-list@python.org>
Message-ID: <1OOqh.23485$sR.5194@newssvr29.news.prodigy.net>

skip at pobox.com wrote:
>     John> Sorry, Skip, but I find that very hard to believe. The foo()
>     John> function would take quadratic time if it were merely adding on
>     John> pieces of constant size -- however len(str(i)) is not a constant,
>     John> it is O(log10(i)), so the time should be
>     John> super-quadratic.
> 
> Sorry, I should have pointed out that I'm using the latest version of
> Python.  I believe += for strings has been optimized to simply extend s when
> there is only a single reference to it.

    I'd heard that, but wasn't sure.  That's the kind of answer I was
looking for.

    That kind of optimization is a huge win.

				John Nagle


From skip at pobox.com  Wed Jan 31 05:52:32 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 31 Jan 2007 04:52:32 -0600
Subject: Executing Javascript, then reading value
In-Reply-To: <1170222193.579676.282040@m58g2000cwm.googlegroups.com>
References: <1170103447.839304.44900@v33g2000cwv.googlegroups.com>
	<mailman.3277.1170104720.32031.python-list@python.org>
	<1170105229.984079.219180@l53g2000cwa.googlegroups.com>
	<LqNvh.1382$zH1.806@newssvr29.news.prodigy.net>
	<1170222193.579676.282040@m58g2000cwm.googlegroups.com>
Message-ID: <17856.29936.584031.754316@montanaro.dyndns.org>


    Melih> In fact what you're describing is exactly what I needed. I ended
    Melih> up finding a way to execute the javascript using Rhino and then
    Melih> capturing the result. Not exactly what I wanted to do, but once I
    Melih> found it out, it works.

There is an embeddable C implementation as well: SpiderMonkey.  It has both
a core engine and a standalone app.  There also appears to a an unmaintained
Python interface: python-spidermonkey.  Relevant URLs:

    http://www.mozilla.org/js/spidermonkey/
    http://cheeseshop.python.org/pypi/python-spidermonkey/

Skip


From michael at mustun.ch  Wed Jan  3 11:05:19 2007
From: michael at mustun.ch (Michael)
Date: Wed, 03 Jan 2007 17:05:19 +0100
Subject: C/C++, Perl, etc. to Python converter
In-Reply-To: <1167839629.435980.311750@k21g2000cwa.googlegroups.com>
References: <G3Qmh.94$9v1.124@nntpserver.swip.net>
	<1167839629.435980.311750@k21g2000cwa.googlegroups.com>
Message-ID: <TuQmh.105$9v1.167@nntpserver.swip.net>

Yes, I konw what you mean. And thats the right way to do it - for 
beginners. --But not for someone who allready know programmings things 
for many years.

They ask themself: How can I do this in Python? I can remember, it was 
that-way with Perl or C or C++ or whatever.

So, not only a ververter can be useful, also a translation table.
(Maybe just a table for print out.)

LangX <-> LangY



Matimus wrote:

> I don't know of a converter, one may exist. I have seen similar
> requests though and will give you a similar response to what I have
> seen. A converter, if it exists, may be able to produce working code
> but _not_ readable code. Python is a language whose strength comes
> from, among other things, its readability and conventions. Learning
> python is best done by using the online documentation
> (http://docs.python.org/tut/tut.html) and reading existing code (take a
> look at the built in modules).
> 
> My biggest fear of teaching someone to program by using a program to
> convert perl to python is that they will end up writing python that
> still looks like perl.
> 
> I don't know if it helps, but I know others will give you similar
> advice.
> 
> -Matt
> 


From kylotan at gmail.com  Wed Jan  3 12:15:56 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 3 Jan 2007 09:15:56 -0800
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <459BCE85.5070707@v.loewis.de>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
	<mailman.2211.1167756187.32031.python-list@python.org>
	<1167757721.883547.70530@42g2000cwt.googlegroups.com>
	<459BCE85.5070707@v.loewis.de>
Message-ID: <1167844551.332740.320760@s34g2000cwa.googlegroups.com>

Martin v. L?wis wrote:

> Ben Sizer schrieb:
> > Firstly, that solution only works for actual Python scripts; it doesn't
> > solve the utility scripts that are often installed to the /scripts
> > directory.
>
> Those packages should install .bat files into /scripts on Windows.

Which still need their location to be be fully qualified, due to
/scripts not being in the path. This is not my experience with Linux
installations of the same packages.

> Please submit a patch that does so, then. Make sure you add user
> interface to make it an option.
>
> These things are *not* easy, and claiming that they are is
> misleading.

I will look into it.

-- 
Ben Sizer



From kent at kentsjohnson.com  Thu Jan 11 14:00:21 2007
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 11 Jan 2007 19:00:21 GMT
Subject: Learning Python book, new edition?
In-Reply-To: <50n9daF1g30l4U1@mid.individual.net>
References: <mailman.2580.1168528978.32031.python-list@python.org>
	<50n9daF1g30l4U1@mid.individual.net>
Message-ID: <45A68944.7020205@kentsjohnson.com>

Bjoern Schliessmann wrote:
> Demel, Jeff wrote:
> 
>> Does anyone know if there's a plan in the works for a new edition
>> of Learning Python?  The current edition (2nd) is a few years old
>> and looks like it only covers Python 2.3.
> 
> IIRC, differences to 2.4 are in it, too.

No, it is one version back from that. From the Preface to the second 
edition: "This edition has been thoroughly updated to reflect Python 
2.2...in addition, discussion of anticipated changes in the upcoming 2.3 
release have been incorporated."

Kent


From smusnmrNOSPAM at yahoo.com  Tue Jan  9 02:58:14 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Tue, 9 Jan 2007 08:58:14 +0100
Subject: help: code formatter?
References: <entknh$8onl$1@zam602.zam.kfa-juelich.de>
	<mailman.2427.1168273761.32031.python-list@python.org>
Message-ID: <envhun$cdnd$1@zam602.zam.kfa-juelich.de>

Chuck wrote:

>  http://lacusveris.com/PythonTidy/PythonTidy.python

Wow, what a giant of a program! Trying to find out how this works.

Thank you,

siggi

"Chuck Rhode" <CRhode at LacusVeris.com> schrieb im Newsbeitrag 
news:mailman.2427.1168273761.32031.python-list at python.org...
> siggi wrote this on Mon, Jan 08, 2007 at 03:33:21PM +0100.  My reply is 
> below.
>
>> Is there a simple code formatter that first removes all indentations
>> and then refomats correctly?
>
> Why, yes, there is:
>
>  http://lacusveris.com/PythonTidy/PythonTidy.python
>
> -- 
> .. Chuck Rhode, Sheboygan, WI, USA
> .. 1979 Honda Goldwing GL1000 (Geraldine)
> .. Weather:  http://LacusVeris.com/WX
> .. 26? - Wind W 17 mph
> 




From bdesth.quelquechose at free.quelquepart.fr  Tue Jan  2 18:22:35 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 03 Jan 2007 00:22:35 +0100
Subject: array of class
In-Reply-To: <1167777053.152492.3460@v33g2000cwv.googlegroups.com>
References: <mailman.2221.1167763760.32031.python-list@python.org>
	<459ad4f7$0$293$426a34cc@news.free.fr>
	<1167777053.152492.3460@v33g2000cwv.googlegroups.com>
Message-ID: <459ae31f$0$294$426a74cc@news.free.fr>

George Sakkis a ?crit :
> Bruno Desthuilliers wrote:
> 
(snip)
>>words = []
>>for w in ['this', 'is', 'probably', 'what', 'you', 'want']:
>>   words.append(Word(w))
>>print words 
> 
> Or more compactly:
> 
> words = [Word(w) for w in 'this is probably what you want'.split()]
> print words

I didn't want to introduce yet some more "confusing" stuff !-)


From paddy3118 at netscape.net  Wed Jan 31 02:22:52 2007
From: paddy3118 at netscape.net (Paddy)
Date: 30 Jan 2007 23:22:52 -0800
Subject: how to "free" an object/var ?
In-Reply-To: <pan.2007.01.31.06.52.12.82782@REMOVEME.cybersource.com.au>
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
	<epolgl$8i4$1@zinnia.noc.ucla.edu>
	<pan.2007.01.31.06.52.12.82782@REMOVEME.cybersource.com.au>
Message-ID: <1170228172.691120.200280@a75g2000cwd.googlegroups.com>

On Jan 31, 6:52 am, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
wrote:
> On Tue, 30 Jan 2007 15:48:37 -0800, James Stroud wrote:
> > Stef Mientki wrote:
> >> If I create a large array of data or class,
> >> how do I destroy it (when not needed anymore) ?
>
> >> Assign it to an empty list ?
>
> >> thanks,
> >> Stef Mientki
>
> > It will be gc'd when you leave the scope or you can call del() to
> > explicitly get rid of the object if its existence bothers you.
>
> That is not quite correct.
>
> big_list = ["data"]*1000000
> another_reference = big_list
> del big_list
>
> At this point, the list of one million "data" strings still exists.
>
> del big_list doesn't delete the list object, it removes the name
> "big_list". Then, only if the list has a reference count of zero, Python
> will dispose of the object and free the memory (if your OS allows that).
> If there are still references to it, like "another_reference" above, it
> will not be disposed of.
>
> As far as I know there is no way to force the deletion of an object even
> if it is in use. This is a Good Thing.
>
> --
> Steven D'Aprano

The folowing will make the data available for garbage collection no
matter what references it:

>>> l = ["data"] *10
>>> l
['data', 'data', 'data', 'data', 'data', 'data', 'data', 'data',
'data', 'data']
>>> l2 = l
>>> l[:] = []
>>> l2
[]
>>>

- Paddy.



From gheissenberger at gmail.com  Fri Jan 12 09:44:27 2007
From: gheissenberger at gmail.com (gheissenberger at gmail.com)
Date: 12 Jan 2007 06:44:27 -0800
Subject: Python nuube needs Unicode help
In-Reply-To: <eo7goj$n4s$03$1@news.t-online.com>
References: <1168550894.155528.295700@p59g2000hsd.googlegroups.com>
	<eo7goj$n4s$03$1@news.t-online.com>
Message-ID: <1168613067.354487.40840@51g2000cwl.googlegroups.com>

Can you attach files in this forum? Couldn't find the option. Oh well,
here's the file.

#!/usr/bin/python
# Version: 1.1
# Author:  Steve Losh

from sets import Set
from optparse import OptionParser
from xml.dom.minidom import parse

AudioPath     = 'audio/'
DatafilePath  = 'utterances.trmxml'
CONFIDENCE_LOW  = None #'500'
CONFIDENCE_HIGH = None #'500'

utterancesFile = None


class Utterance:
    def __init__(self, audio, grammarSet, text):
        self.audio      = audio
        self.grammarSet = grammarSet
        self.text       = text

    def __str__(self):
        return "SWIrecAcousticStateReset\ntranscription " + self.text \
                + "\nrecognize " + AudioPath + self.audio


def getGrammarPaths():
    """Get the paths of all the grammars needed.  Returns a Set
containing the results.
If a grammar is listed more than once in the transcription manifest it
will only appear once in these results.

TODO:
Find a less fragile way to split off the server half of the URIs."""
    grammarTags  = utterancesFile.getElementsByTagName('Grammar')
    grammarURIs  = [tag.getAttribute('uri') for tag in grammarTags]
    grammarPaths = [uri.split('servlet/CA/')[1] for uri in grammarURIs]
    return Set(grammarPaths)


def createGrammarNameFromPath(path):
    """Convert a given path into an appropriate name for the
grammar."""
    path = path.replace('/', '-')  # Strip the directory slashes
    path = path.replace('.', '_')  # and the dot before the extension.
    return path


def loadGrammars():
    """Output the statements that will load the required grammars."""
    grammarPaths = list(getGrammarPaths())
    grammarsToLoad = {}
    for path in grammarPaths:
        grammarName = createGrammarNameFromPath(path)
        grammarsToLoad[grammarName] = "grammars/" + path
    for grammarName in grammarsToLoad:
        print "SWIrecGrammarLoad", grammarName,
grammarsToLoad[grammarName]


def loadGrammarSets():
    """Output the statements that will define the grammar
sets/contexts.  Returns a list of the grammar set names."""
    grammarSetList  =
utterancesFile.getElementsByTagName('GrammarSets')
    grammarSets     =
grammarSetList[0].getElementsByTagName('GrammarSet')
    grammarSetNames = []
    for gs in grammarSets:
        grammarSetName = gs.getAttribute('id')
        print "context_define", grammarSetName, CONFIDENCE_LOW,
CONFIDENCE_HIGH
        for g in gs.getElementsByTagName('Grammar'):
            path = g.getAttribute('uri').split('servlet/CA/')[1]
            print "context_add", createGrammarNameFromPath(path),
'1000'
        print "context_end\n"
        grammarSetNames.append(grammarSetName)
    return grammarSetNames


def buildUtterances(call):
    """This function takes a call tag, builds the utterances belonging
to it and returns a list containing them."""
    utts = call.getElementsByTagName('Utt')
    utterances = [Utterance( utt.getAttribute('audio'), \
                             utt.getAttribute('grammarSet'),
                             utt.getAttribute('transcribedText') ) \
                  for utt in utts]
    return utterances


def getUtterances():
    """Returns a list of all the utterances we want to test."""
    callList = utterancesFile.getElementsByTagName('Calls')[0]
    calls = callList.getElementsByTagName('Call')
    utterances = []
    for c in calls:
        utterances.extend(buildUtterances(c))
    return utterances


def loadData(utterances):
    """Outputs the statements that will tell rec_test what to test."""
    contexts = {}
    for u in utterances:
        if u.grammarSet not in contexts:
            contexts[u.grammarSet] = []
        contexts[u.grammarSet].append(u)
    for c in contexts:
        print "open errors " + c + ".errors"
        print "open utd "    + c + ".utd"
        print "context_use", c
        for u in contexts[c]:
	    print u
        print "close utd"
        print "close errors"
        print "\n"


def makeParser():
    parser = OptionParser( "usage: %prog -l LOWER CONFIDENCE -h UPPER
CONFIDENCE [-f FILTER1 -f FILTER2 ...] file" )
    parser.add_option("-l", "--low-confidence", dest="lower", \
                      help="The lower confidence level to test at.",
metavar="CONFIDENCE")
    parser.add_option("-u", "--upper-confidence", dest="upper", \
                      help="The upper confidence level to test at.",
metavar="CONFIDENCE")
    parser.add_option("-f", "--filter", dest="filter", action="append",
\
                      help="Only test utterances transcribed as WORD.",
metavar="WORD")
    return parser


def main():
    global utterancesFile, CONFIDENCE_HIGH, CONFIDENCE_LOW
    parser = makeParser()
    (options, args) = parser.parse_args()
    if len(args) != 1:
        parser.error("One data file must be specified.")
    elif options.lower == None:
        parser.error("A lower confidence level must be specified.")
    elif options.upper == None:
        parser.error("An upper confidence level must be specified.")

    DatafilePath = args[0]
    CONFIDENCE_LOW  = options.lower
    CONFIDENCE_HIGH = options.upper

    utterancesFile = parse(DatafilePath)

    print ':ACC\n\n'
    loadGrammars()
    print "\n\n"

    grammarSetNames = loadGrammarSets()

    utterances = getUtterances()
    if options.filter != None:
        utterances = [u for u in utterances if u.text in
options.filter]

    print "\n\n"
    loadData(utterances)

    print "report summary summary.txt"
    print "report oov oov.txt"
    print "report words words.txt"


if __name__ == '__main__':
    main()




Peter Otten wrote:
> gheissenberger at gmail.com wrote:
>
> > HELP!
> > Guy who was here before me wrote a script to parse files in Python.
> >
> > Includes line:
> > print u
>
> According to your other posts 'u' seems to be an instance of a custom
> Utterance class with a __str__() method that accidentally returns unicode.
> Try changing the print statement to
>
> print unicode(u)
>
> If you're lucky, it works. Otherwise we need a piece of the actual code. To
> give you an idea what a self-contained demonstration of your problem might
> look like:
>
> >>> class Utterance(object):
> ...     def __str__(self): return u"???"
> ...
> >>> u = Utterance()
> >>> print u
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-2:
> ordinal not in range(128)
> >>> print unicode(u)
> ???
> 
> Peter



From mike.klaas at gmail.com  Wed Jan 10 17:35:29 2007
From: mike.klaas at gmail.com (Klaas)
Date: 10 Jan 2007 14:35:29 -0800
Subject: Problem installing cElementTree on Python 2.5
In-Reply-To: <m2odp6a5gs.fsf@ordesa.lan>
References: <m2odp6a5gs.fsf@ordesa.lan>
Message-ID: <1168468529.118344.254020@i39g2000hsf.googlegroups.com>

Piet van Oostrum wrote:
> I have just installed Python 2.5 on Mac OS X 10.4.8 on an iBook (PPC) from
> the dmg. Now I tried to install cElementTree -1.0.5-20 from source (no egg
> available in cheeseshop) and got the following compilation error:

python2.5 ships with cElementTree:

import xml.etree.cElementTree

cheers,
-Mike



From martin at v.loewis.de  Wed Jan 10 17:01:00 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 10 Jan 2007 23:01:00 +0100
Subject: dynamic library loading, missing symbols
In-Reply-To: <1168458713.270248.165830@i56g2000hsf.googlegroups.com>
References: <1168439928.436359.240390@i39g2000hsf.googlegroups.com>
	<1168458713.270248.165830@i56g2000hsf.googlegroups.com>
Message-ID: <45A5621C.8090104@v.loewis.de>

dfj225 at gmail.com schrieb:
> I suppose this means that any subsequent libraries dlopened will not
> see any of the symbols in my module?

That's correct, and intentional. Python has crashed in the past when
symbols conflicted across shared libraries.

> I guess I'll have to look through the Python documentation to see if
> they offer any work arounds to this problem.

There is sys.setdlopenflags, but I would use it with caution.

Regards,
Martin


From duncan.booth at invalid.invalid  Tue Jan 30 09:43:27 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 30 Jan 2007 14:43:27 GMT
Subject: How can I know both the Key c and Ctrl on the keyboard are
	pressed?
References: <1170147029.261981.322740@a75g2000cwd.googlegroups.com>
	<1170164680.123191.206630@p10g2000cwp.googlegroups.com>
Message-ID: <Xns98C8965DED03Aduncanbooth@127.0.0.1>

"Szabolcs Nagy" <nszabolcs at gmail.com> wrote:

> however Ctrl+C is a special key combination: running python in a 
unix 
> terminal it raises KeyboardInterrupt exception, imho in a windows 
cmd 
> promt it raises SystemExit
> 
Your humble opinion is wrong.

Under windows Ctrl-C raises KeyboardInterrupt just as it does under 
linux. Ctrl-break by default terminates the program (without invoking 
Python's usual cleanup), but you can override that behaviour by 
registering a different signal handler.

e.g.

  import signal
  signal.signal(signal.SIGBREAK,
                signal.default_int_handler)

will make Ctrl-break raise KeyboardInterrupt just like Ctrl-C.



From ironfroggy at gmail.com  Mon Jan 15 17:50:56 2007
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Mon, 15 Jan 2007 17:50:56 -0500
Subject: The curious behavior of integer objects
In-Reply-To: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
Message-ID: <76fd5acf0701151450q2762dbcco3a2169691f0e5a94@mail.gmail.com>

As it turns out, this has little to do with integers and the
operations you are trying to do on them. I'll explain in more detail.

Integers are immutable, which you may already know. This presents a
problem with subclassing them and using the usual special method
__init__, because the int object has already been created by this
point and can not change. Another special method, __new__, is called
passing the class object itself (foo, in this case) for the first
argument (traditionally named cls, instead of self). The return of
this should be an integer which will be the value of your new foo
int-subclass.

The following will do as you expected your own example to do.

class foo(int):
    def __new__(cls, value):
        return value & 0xF

assert foo(0x10) == 0  # Assertions are much better tests than prints :-)

On 1/15/07, Jim B. Wilson <wilson at afn.org> wrote:
> Am I nuts? Or only profoundly confused? I expected the this little script
> to print "0":
>
> class foo(int):
>   def __init__(self, value):
>     self = value & 0xF
>
> print foo(0x10)
>
> Instead, it prints "16" (at least on python 2.4.4 (Linux) and 2.5 (Wine).
>
> Jim Wilson
> GNV, FL
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From sturlamolden at yahoo.no  Tue Jan  9 06:00:43 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 9 Jan 2007 03:00:43 -0800
Subject: Why less emphasis on private data?
In-Reply-To: <1168283295.899914.125400@38g2000cwa.googlegroups.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168283295.899914.125400@38g2000cwa.googlegroups.com>
Message-ID: <1168340443.888779.176630@51g2000cwl.googlegroups.com>


time.swift at gmail.com wrote:

> I let the user change the internal state of the engine, I have no
> assurances that my product (the engine) is doing its job...

How would you proceed to protect this inner states? In C++ private
members they can be accessed through a cast to void pointer. In Java it
can be done through introspection. In C# it can be done through
introspection or casting to void pointer in an 'unsafe' block. There is
no way you can protect inner states of an object, it is just an
illusion you may have.

Python have properties as well. Properties has nothing to do with
hiding attributes.



From miki.tebeka at gmail.com  Fri Jan 26 08:45:18 2007
From: miki.tebeka at gmail.com (Miki)
Date: 26 Jan 2007 05:45:18 -0800
Subject: Help extracting info from HTML source ..
In-Reply-To: <mailman.3182.1169776623.32031.python-list@python.org>
References: <mailman.3182.1169776623.32031.python-list@python.org>
Message-ID: <1169819118.201093.267320@h3g2000cwc.googlegroups.com>

Hello Shelton,

>   I am learning Python, and have never worked with HTML.  However, I would
> like to write a simple script to audit my 100+ Netware servers via their web
> portal.
Always use the right tool, BeautilfulSoup
(http://www.crummy.com/software/BeautifulSoup/) is best for web
scraping (IMO).

from urllib import urlopen
from BeautifulSoup import BeautifulSoup

html = urlopen("http://www.python.org").read()
soup = BeautifulSoup(html)
for link in soup("a"):
	print link["href"], "-->", link.contents

HTH,
--
Miki
http://pythonwise.blogspot.com/



From joeyslistings at yahoo.com  Sun Jan  7 07:48:17 2007
From: joeyslistings at yahoo.com (joeyslistings at yahoo.com)
Date: 7 Jan 2007 04:48:17 -0800
Subject: I want to learn
Message-ID: <1168174097.252001.71130@s80g2000cwa.googlegroups.com>

Hi,

I have been "programming" in the .net environment and ide for a few
years and I am looking to make the switch over to python. I have
absolutely no python experience whatsoever. I am looking for a python
guru who has instant messenger or gtalk or whatever who can meet me
online in the mornings, give me some direction for the day and then
answer some questions here and there online throughout the day. This
would not be time consuming on your end and if necessary I would pay
you for this. Ideally you would have familiarity with c# asp.net visual
studio ide ajax.net etc. so you would understand where I'm coming from.
 Sorry to interrupt the group but since all python gurus appear to be
happily at work on the next level apps at google nobody responded to my
craigslist ads.

Thanks



From rw at smsnet.pl  Thu Jan 25 08:04:48 2007
From: rw at smsnet.pl (Rob Wolfe)
Date: 25 Jan 2007 05:04:48 -0800
Subject: module email
In-Reply-To: <epa2at$2vc7$1@news.rtcomm.ru>
References: <ep7vuk$235b$1@news.rtcomm.ru><874pqgf7hb.fsf@smsnet.pl>
	<epa2at$2vc7$1@news.rtcomm.ru>
Message-ID: <1169730288.242005.176860@v45g2000cwv.googlegroups.com>


Sergey Dorofeev wrote:
> "Rob Wolfe" <rw at smsnet.pl> wrote in message news:874pqgf7hb.fsf at smsnet.pl...
>
> >> p2=email.message.Message()
> >> p2.set_type("message/rfc822")
> >> p2.set_payload(m)
> >
> > Payload is a _list_ of Message objects (is_multipart() == True)
> > or a _string_ object (is_multipart() == False) but never just Message
> > object.
>
> 1. If I give m.as_string() into set_payload, result is the same.

The payload of a message/rfc822 is treated like a sequence
of length 1. So that works:
p2.set_payload([m])

> 2. I don't understand, how message/rfc822 section can accept a list of two
> or more messages. Can you explain?

That's another question.
I don't understand either, why the payload for message/rfc822 has to be
a list of length 1 and not a Message object itself.
This assumption looks strange to me, too, but I can live with that. :)

-- 
Regards,
Rob



From gagsl-py at yahoo.com.ar  Thu Jan  4 22:08:59 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 05 Jan 2007 00:08:59 -0300
Subject: bug in copy.deepcopy or in getattr or in my understanding?
In-Reply-To: <1167942359.246311.80700@s34g2000cwa.googlegroups.com>
References: <1167942359.246311.80700@s34g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070104235152.05b017a8@yahoo.com.ar>

At Thursday 4/1/2007 17:26, Emin wrote:

>I got some unexpected behavior in getattr and copy.deepcopy (see
>transcript below). I'm not sure if this is actually a bug in
>copy.deepcopy or if I'm doing something too magical with getattr.
>Comments would be appreciated.

Both examples are different. #1 stores a *bound* method into an 
instance attribute. Bound methods carry a reference to "self", this 
creates a cyclic reference that may cause problems to the garbage 
collector (and confuses deepcopy, apparently).
#2 uses and *unbound* method and it's the usual way.

> >>> class a:
>...     def foo(self):
>...             print 'hi'
>...
> >>> class b(a): #1
>...     def __init__(self):
>...             self.y = getattr(self,'foo')
>
> >>> class b(a): #2
>...     def __init__(self):
>...             self.x = self.__class__.__bases__[0].__dict__['foo']

For #2 you can simply say:

class b(a):
     x = a.foo

If you have to choose at runtime (a simplified version of your own code):

class b(a):
     def __init__(self):
         name = select_method_to_use(..., default="foo")
         self.x = getattr(a, name)

You *know* your bases because you wrote them in the class statement 
(or use super() instead of playing with __bases__); and getattr works 
fine here so you don't need to mess with the __dict__ details.

(Note that #1 was *almost* right, you had to replace self by the base class)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From chris at wavestore.com  Mon Jan 29 04:47:51 2007
From: chris at wavestore.com (Christopher Mocock)
Date: Mon, 29 Jan 2007 09:47:51 +0000
Subject: Handling empty form fields in CGI
In-Reply-To: <1169837596.200333.94360@s48g2000cws.googlegroups.com>
References: <mailman.3207.1169834026.32031.python-list@python.org>
	<1169837596.200333.94360@s48g2000cws.googlegroups.com>
Message-ID: <45BDC2C7.9000107@wavestore.com>

Paul Boddie wrote:
> Try replacing this with...
> 
> form = cgi.FieldStorage(keep_blank_values=1)
> 
> Paul
> 

That worked a treat. Thanks very much to both who replied.

Chris.


From aisaac at american.edu  Sat Jan 27 18:07:08 2007
From: aisaac at american.edu (Alan Isaac)
Date: Sat, 27 Jan 2007 23:07:08 GMT
Subject: stop script w/o exiting interpreter
References: <Lyauh.8689$QE6.2176@trnddc02>
Message-ID: <wWQuh.1259$SE6.1215@trnddc03>

Please note that this post has subject
"stop script w/o exiting interpreter".

The object is to work at the *interactive* interpreter,
without leaving it.

Here is an example goal:
start a Python shell,
execfile a script,
exit the script at line 25,
and return to the Python shell.

E.g., some languages include a ``stop`` statement that you can put on line
25.
Ideally, I would like the equivalent of this.

Solutions suggested in this thread included:
- raise SystemExit
     but this will exit the interpreter
- sys.exit()
     but this will exit the interpreter
- use pdb's set_trace()
     but I think that answers a different question.
     (However it does work to raise BdbQuit, but I'd like something less
messy.)
- wrap all code in functions and test the functions
     but this does not apply to my current use case
- use PyScripter
     but this is overkill for my very simple goal

Note that I can just put the undefined name ``stop`` on any line
I want, and the script will stop execucting at that line and will
return to the interactive interpreter, as I wish.  It is just that it
returns with an error message, and I'd like to avoid that.

Thanks,
Alan Isaac




From dave.dean at xilinx.com  Tue Jan  2 20:57:18 2007
From: dave.dean at xilinx.com (Dave Dean)
Date: Tue, 2 Jan 2007 17:57:18 -0800
Subject: Iterate through list two items at a time
Message-ID: <enf2he$2sr1@cnn.xsj.xilinx.com>

Hi all,
  I'm looking for a way to iterate through a list, two (or more) items at a 
time.  Basically...

  myList = [1,2,3,4,5,6]

I'd like to be able to pull out two items at a time - simple examples would 
be:
Create this output:
1 2
3 4
5 6

Create this list:
[(1,2), (3,4), (5,6)]

I want the following syntax to work, but sadly it does not:
for x,y in myList:
  print x, y

I can do this with a simple foreach statement in tcl, and if it's easy in 
tcl it's probably not too hard in Python.

Thanks,
Dave 




From bborcic at gmail.com  Thu Jan 25 14:13:13 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Thu, 25 Jan 2007 20:13:13 +0100
Subject: Do I need Python to run Blender correctly?
In-Reply-To: <1169724703.257330.188030@v45g2000cwv.googlegroups.com>
References: <tRZth.2027$pH3.140@newsfe12.phx>	<1169722064.189055.61620@v45g2000cwv.googlegroups.com>
	<1169724703.257330.188030@v45g2000cwv.googlegroups.com>
Message-ID: <epavhr$5jl$1@sea.gmane.org>

Hieu.D.Hoang at gmail.com wrote:
 > Also note that only standard modules bundled in the Blender package are
 > available. And extension modules e.g. numpy can't be installed into it.

Not my experience, I've installed and used numpy (or was it Numeric ?) with 
Blender Python a couple years ago.

YMMV, Boris Borcic



From gagsl-py at yahoo.com.ar  Fri Jan 19 10:44:59 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 12:44:59 -0300
Subject: when format strings attack
References: <1169207467.989977.162940@q2g2000cwa.googlegroups.com>
Message-ID: <eoqp1t$p9q$1@sea.gmane.org>

<Eric_Dexter at msn.com> escribi? en el mensaje 
news:1169207467.989977.162940 at q2g2000cwa.googlegroups.com...

> http://www.ddj.com/184405774;jsessionid=BDDEMUGJOPXUMQSNDLQCKHSCJUNN2JVN
>
> I saw a warning from homeland security about this.  I only comment on
> the because I am trying to use os.system('command1 arg') and it doesn't
> work but I do see examples with % that is borrowed from the c language.
> Seems like if I can write a batch file that does something the same
> behavior should happen in the os module..

Pure Python programs are not affected, but a review of the C implementation 
should be made to see if any (variant of) printf is used without a proper 
format. Anyway I doubt you could find something, because the vulnerability 
is so well known for ages.

-- 
Gabriel Genellina 




From jfabiani at yolo.com  Wed Jan 10 21:27:44 2007
From: jfabiani at yolo.com (johnf)
Date: Wed, 10 Jan 2007 18:27:44 -0800
Subject: Read from database, write to another database, simultaneously
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
	<50l9dlF1fuc1sU1@mid.individual.net>
Message-ID: <9ihph.72$fo1.64@newsfe03.lga>

Bjoern Schliessmann wrote:

> Sean Davis wrote:
> 
>> The author of one of the python database clients mentioned that
>> using one thread to retrieve the data from the oracle database and
>> another to insert the data into postgresql with something like a
>> pipe between the two threads might make sense, keeping both IO
>> streams busy.
> 
> IMHO he's wrong. Network interaction is quite slow compared with CPU
> performance, so there's no gain (maybe even overhead due to thread
> management and locking stuff). That's true even on multiprocessor
> machines, not only because there's almost nothing to compute but
> only IO traffic. CMIIW.
> 
> Using multiplexing, you'll get good results with simple code without
> the danger of deadlocks. Have a look at asyncore (standard library)
> or the Twisted framework -- personally, I prefer the latter.
> 
> Regards,
> 
> 
> Bj?rn
> 
Sean you can't win - everyone has a different idea!  You need to explain
that oracle has millions of records and it's possible to a pipe open to
feed the Postgres side.  

One thing I didn't get - is this a one time transfer or something that is
going to happen often.  

One time transfer live to the time issue.  

Johnf


From mccredie at gmail.com  Wed Jan  3 12:14:26 2007
From: mccredie at gmail.com (Matimus)
Date: 3 Jan 2007 09:14:26 -0800
Subject: code optimization (calc PI)
In-Reply-To: <XgQmh.98$9v1.124@nntpserver.swip.net>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
Message-ID: <1167844466.030065.303280@k21g2000cwa.googlegroups.com>

Using the '+' operator for string concatonation can be slow, especially
when done many times in a loop.

>    pi = pi + str("%04d" % int(e + d/a))  ## this should be fast?! I dont

The accepted solution would be to make pi an array and append to the
end...

pi = [] #create the array (empty)
...
...
pi.append(str("%04d"%int(e+d/a))) # append to it

And when it is time to print the results do the following:

print "".join(pi)

It may look strange, but it is a common Python idiom. You might also
look into an optimizer such as psycho: http://psyco.sourceforge.net/.



From george.sakkis at gmail.com  Mon Jan 22 15:13:23 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 22 Jan 2007 12:13:23 -0800
Subject: mmap caching
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>
	<slrner7h27.d8g.nick@irishsea.home.craig-wood.com>
	<1169415139.515834.233700@a75g2000cwd.googlegroups.com>
	<4X7th.13145$pQ3.5671@newsread4.news.pas.earthlink.net>
Message-ID: <1169496803.518305.275750@s34g2000cwa.googlegroups.com>

Dennis Lee Bieber wrote:

> On 21 Jan 2007 13:32:19 -0800, "George Sakkis" <george.sakkis at gmail.com>
> declaimed the following in comp.lang.python:
>
> >
> > The file is written once and then opened as read-only, there's no
> > flushing. So if caching is completely up to the OS, I take it that my
>
> 	How large is said file? While the OS should handle swapping pages as
> needed, you do have to recall that those pages are /mapped/ into the
> process virtual address space. Trying to mmap a 2GB file into a process
> that is already using 1GB of memory may not work (what is the default
> Windows split? 2GB process and 2GB shared OS?)

It's around 400MB. As I said, I cannot reproduce the MemoryError
locally since I have 1GB physical space but IIRC the user who reported
it had less. Actually I am less concerned about whether a MemoryError
is raised or not in this case and more about the fact that even if
there's no exception, the program may suffer from severe thrashing due
to constant swapping. That's an issue with the specific
program/algorithm rather with Python or the OS.

George



From bj_666 at gmx.net  Wed Jan 17 04:11:40 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 17 Jan 2007 10:11:40 +0100
Subject: How can I create a linked list in Python?
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<1168983652.192715.235580@a75g2000cwd.googlegroups.com>
Message-ID: <pan.2007.01.17.09.11.39.502517@gmx.net>

In <1168983652.192715.235580 at a75g2000cwd.googlegroups.com>, bearophileHUGS
wrote:

> In CPython they are dynamic arrays, they aren't lists. Try adding
> elements at the beginning of a list compared to adding elements at the
> beginning or in the middle of a python "list" and you will see the
> efficiency differences.

Python has a list type without the "s, it's a real list.  Don't confuse
the *ADT list* with *linked lists* which are just one implementation of
the ADT list.

Ciao,
	Marc 'BlackJack' Rintsch


From smusnmrNOSPAM at yahoo.com  Mon Jan 15 03:54:46 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Mon, 15 Jan 2007 09:54:46 +0100
Subject: pygame and python 2.5
References: <eo7jji$61nu$1@zam602.zam.kfa-juelich.de>
	<eo7nca$7cf$1@upsn250.cri.u-psud.fr>
Message-ID: <eoffgn$epas$1@zam602.zam.kfa-juelich.de>

Thanks, I'll try that!

Siggi

"Laurent Pointal" <laurent.pointal at limsi.fr> schrieb im Newsbeitrag
news:eo7nca$7cf$1 at upsn250.cri.u-psud.fr...
> siggi a ?crit :
>> Hi all,
>>
>> when I rtry to install pygame (pygame-1.7.1release.win32-py2.4.exe, the
>> most
>> ciurrent version I found) it requires Python 2.4! Will I really have to
>> uninstall my Python 2.5  and install the old Python 2.4 in order to use
>> pygame?
>
> Note: You can have both versions installed, just be sure to use the
> right one when using pygame (until there is a 2.5 compatible version).
>





From nagle at animats.com  Sun Jan  7 14:13:57 2007
From: nagle at animats.com (John Nagle)
Date: Sun, 07 Jan 2007 11:13:57 -0800
Subject: Why less emphasis on private data?
In-Reply-To: <1168188427.144219.206490@s80g2000cwa.googlegroups.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
Message-ID: <9dboh.11767$ZT3.426@newssvr19.news.prodigy.com>

sturlamolden wrote:
> time.swift at gmail.com wrote:
> 
>>Coming from a C++ / C# background, the lack of emphasis on private data
>>seems weird to me. I've often found wrapping private data useful to
>>prevent bugs and enforce error checking..
>>
>>It appears to me (perhaps wrongly) that Python prefers to leave class
>>data public.  What is the logic behind that choice?
> 
> 
> The designers of Java, C++, C#, Ada95, Delphi, etc. seem to think that
> if an object's 'internal' variables or states cannot be kept private,
> programmers get an irresistible temptation to mess with them in
> malicious ways.

     If you're not clear on encapsulation issues, you probably haven't
done extensive maintenance programming on code written by others.
Finding out who can mess with a variable when debugging the code of
others is not fun.

     Because Python doesn't have explicit declarations, scope of variables is
a touchy issue.  If you write "x = 1" within a function, that will
create a local "x" if "x" doesn't exist, or alter a global "x" if "x" was
previously created in the global context.  But at least global variables
are local to the namespace; we don't have clashes across files.  So
it's not too bad.  JavaScript has the convention that newly created
variables are global by default.  Big mistake.

     The underscore thing makes sense.  Single underscore
variables are "protected" in the C++ sense, and double underscore
variables are "private", not visible from inherited classes.
It's hard to misuse such variables by accident.  I'd be tempted
to prohibit access to underscore variables other than via "self._x"
forms, so they'd be inaccessable outside the object.  It's undesirable
from a maintenance standpoint to have an unenforced convention like
a lead underscore.  The maintenance programmer can't trust its meaning.

     As Python grows up, and larger systems are written in it, these
issues become more important.

				John Nagle
				Animats


From steve at holdenweb.com  Wed Jan 24 10:21:42 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 24 Jan 2007 15:21:42 +0000
Subject: Thoughts on using isinstance
In-Reply-To: <1169647934.219682.144390@j27g2000cwj.googlegroups.com>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>	<mailman.3077.1169645738.32031.python-list@python.org>
	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>
Message-ID: <45B77986.9060708@holdenweb.com>

abcd wrote:
>> The "Python way" is to validate by performing the operations you need to
>> perform and catching any exceptions that result. In the case of your
>> example, you seem to be saying that you'd rather raise your own
>> exception (which, by the way, should really be a subclass of Exception,
>> but we will overlook that) that relying on the interpreter to raise a
>> ValueError or a TypeError. Is there really any advantage to this? You
>> increase your code size and add *something* to execution time with
>> little real purpose.
>>
>> People coming to Python after C++ or some similar language that allows
>> or requires parameter type declarations often don't feel comfortable
>> taking this direction to start with, but  it works well for most of us.
>>
>> regards
>>   Steve
> 
> 
> So instead of validating input I should just try and use the input as
> if it was correct, and let python throw the errors?
> 
Yes. This approach is often referred to as BTAFTP (better to ask 
forgiveness than permission), as opposed to the LBYL (look before you 
leap) approach that your original email inquired about.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From bignose+hates-spam at benfinney.id.au  Wed Jan 17 04:27:54 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 17 Jan 2007 20:27:54 +1100
Subject: Conflicting needs for __init__ method
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<mailman.2741.1168898073.32031.python-list@python.org>
	<pan.2007.01.16.03.02.03.4711@REMOVEME.cybersource.com.au>
	<740c3aec0701160837r33340866w5ddef3e09a0de537@mail.gmail.com>
	<873b6abp12.fsf@benfinney.id.au>
	<740c3aec0701170103k29c17df9xdb8c32a3a878ac00@mail.gmail.com>
Message-ID: <87r6tu80kl.fsf@benfinney.id.au>

"BJ?rn Lindqvist" <bjourne at gmail.com> writes:

> On 1/16/07, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > Use the supplied value as you expect to be able to use it, and
> > catch the exception (somewhere) if it doesn't work. That will
> > allow *any* type that exhibits the correct behaviour, without
> > needlessly restricting it to a particular inheritance.
>
> Can you show an example of that? It seems like that approach would
> lead to some very convoluted code.

Perhaps so. I don't recommend either of those approaches; I recommend,
instead, separate factory functions for separate input types.

-- 
 \        "When I was crossing the border into Canada, they asked if I |
  `\     had any firearms with me. I said, 'Well, what do you need?'"  |
_o__)                                                 -- Steven Wright |
Ben Finney



From fred at adventistcare.org  Sun Jan 21 18:54:04 2007
From: fred at adventistcare.org (Sells, Fred)
Date: Sun, 21 Jan 2007 18:54:04 -0500
Subject: OpenOffice 2.0 UNO update Links; need help
Message-ID: <1A4BF05172023E468CB6E867923BC90404B0CF33@accmail2.sunbelt.org>

I've got a ~100 page document I assemble from ~30 OOo .odt files with some
search and replace functions.  I then produce a PDF.  So far so good.

Now I need to get a barcode from our internal website and insert that.  The
barcode will vary based on some parameters.  Our internal site provides a
.jpg image (or .gif) based on those parameters.

Can anyone provide a snippet or some pointers on how to do this.  I've
googled it to death and checked the OOo DevGuide to no avail.

Either python or java solution is acceptable.



---------------------------------------------------------------------------
The information contained in this message may be privileged and / or
confidential and protected from disclosure. If the reader of this message is
not the intended recipient, you are hereby notified that any dissemination,
distribution or copying of this communication is strictly prohibited. If you
have received this communication in error, please notify the sender
immediately by replying to this message and deleting the material from any
computer.
---------------------------------------------------------------------------


From john.pythonlist at gmail.com  Wed Jan 24 20:06:56 2007
From: john.pythonlist at gmail.com (john g)
Date: Wed, 24 Jan 2007 20:06:56 -0500
Subject: memory leak
Message-ID: <c6b295ee0701241706x1245db67wefa002b4c4b489c6@mail.gmail.com>

i have a memory leak issue with extension function that im working on. it
reads data from a binary file into a stl vector then creates a new list to
pass back to the python interface. the function works the first 1021 times
but then gives a segmentation fault (core dumped). heres the business part
of the code:


//read data
    vector<float> data;
    float temp;


    for(int x=0;x<np*2;x++)
    {
        fread(&temp,sizeof(float),1,datfil);
        data.push_back(temp);
    }


    //convert vector to list
    PyObject *newlist = PyList_New(np*2);
    PyList_SetItem(newlist, 0,PyFloat_FromDouble(data[0]));
    for(int x=0;x<np*2;x++)
    {
        PyList_SetItem(newlist, x,PyFloat_FromDouble(data[x]));
    }






    //send back list
    return newlist;

thanks for any advice
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070124/26f61367/attachment.html>

From sigzero at gmail.com  Sun Jan 21 16:35:58 2007
From: sigzero at gmail.com (Robert Hicks)
Date: 21 Jan 2007 13:35:58 -0800
Subject: Beginners Tutorial in PDF Format?
In-Reply-To: <_6Qsh.51414$wc5.5373@newssvr25.news.prodigy.net>
References: <_6Qsh.51414$wc5.5373@newssvr25.news.prodigy.net>
Message-ID: <1169415358.277431.130640@s34g2000cwa.googlegroups.com>


W. Watson wrote:
> I'd like to print a tutorial in one fell swoop, but it seems most on the
> various sites are page by page embedded descriptions in the page. Any
> available as a pdf?
>
>           Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
>               (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
>                Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet
>
>                 Two laws Newton and Einstein didn't discover:
>                   1. Time is money.
>                   2. Matter will be damaged in direct proportion
>                      to its value.
> --
>                      Web Page: <home.earthlink.net/~mtnviews>

http://docs.python.org/download.html

http://www.diveintopython.org/

HTH

Robert



From timr at probo.com  Mon Jan  1 01:33:04 2007
From: timr at probo.com (Tim Roberts)
Date: Mon, 01 Jan 2007 06:33:04 GMT
Subject: Easiest way to print from XP/DOS.
References: <mailman.2135.1167431318.32031.python-list@python.org>
	<mailman.2138.1167436693.32031.python-list@python.org>
	<db7cp2lj6tkeliat7rdpe45mdk2mfjq65m@4ax.com>
	<mailman.2152.1167496837.32031.python-list@python.org>
Message-ID: <slahp21tnr0ddqpb6ovan2arr2vvkpt6fj@4ax.com>

jim-on-linux <inq1ltd at verizon.net> wrote:
>
>Thanks, 
>The client is in a one printer office.  If the 
>output file is opened with note and then sent to 
>the printer everything is fine but it defeats the 
>purpose of the utility.  Also tried  > lpt1  but 
>the same results.

Is it a USB printer?  Remember that "prn" and "lpt1" refer to the first
parallel port, not necessarily the first printer.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From justinjohnson at gmail.com  Wed Jan 10 10:29:12 2007
From: justinjohnson at gmail.com (Justin Johnson)
Date: 10 Jan 2007 07:29:12 -0800
Subject: Building Python 2.5.0 on AIX 5.3 - Undefined symbol: .__floor
Message-ID: <1168442952.063392.225160@p59g2000hsd.googlegroups.com>

Hello,

I'm trying to build Python 2.5.0 on AIX 5.3 using IBM's compiler
(VisualAge C++ Professional / C for AIX Compiler, Version 6).  I run
configure and make, but makes fails with undefined symbols.  See the
output from configure and make below.

svnadm /svn/build/python-2.5.0>env CC=cc CXX=xlC ./configure
--prefix=$base_dir \
>     --disable-ipv6 \
>     --enable-shared=yes \
>     --enable-static=no
checking MACHDEP... aix5
checking EXTRAPLATDIR...
checking for --without-gcc...
checking for gcc... cc_r
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... no
checking whether cc_r accepts -g... yes
checking for cc_r option to accept ANSI C... none needed
checking for --with-cxx-main=<compiler>... no
checking how to run the C preprocessor... cc_r -E
checking for egrep... grep -E
checking for AIX... yes
checking for --with-suffix...
checking for case-insensitive build directory... no
checking LIBRARY... libpython$(VERSION).a
checking LINKCC... $(srcdir)/Modules/makexp_aix Modules/python.exp .
$(LIBRARY); $(PURIFY) $(MAINCC)
checking for --enable-shared... yes
checking for --enable-profiling...
checking LDLIBRARY... libpython$(VERSION).a
checking for ranlib... ranlib
checking for ar... ar
checking for svnversion... found
checking for a BSD-compatible install... ./install-sh -c
checking for --with-pydebug... no
checking whether cc_r accepts -OPT:Olimit=0... no
checking whether cc_r accepts -Olimit 1500... no
checking whether pthreads are available without options... yes
checking whether xlC also accepts flags for thread support... no
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking asm/types.h usability... no
checking asm/types.h presence... no
checking for asm/types.h... no
checking conio.h usability... no
checking conio.h presence... no
checking for conio.h... no
checking curses.h usability... yes
checking curses.h presence... yes
checking for curses.h... yes
checking direct.h usability... no
checking direct.h presence... no
checking for direct.h... no
checking dlfcn.h usability... yes
checking dlfcn.h presence... yes
checking for dlfcn.h... yes
checking errno.h usability... yes
checking errno.h presence... yes
checking for errno.h... yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking grp.h usability... yes
checking grp.h presence... yes
checking for grp.h... yes
checking shadow.h usability... no
checking shadow.h presence... no
checking for shadow.h... no
checking io.h usability... no
checking io.h presence... no
checking for io.h... no
checking langinfo.h usability... yes
checking langinfo.h presence... yes
checking for langinfo.h... yes
checking libintl.h usability... no
checking libintl.h presence... no
checking for libintl.h... no
checking ncurses.h usability... no
checking ncurses.h presence... no
checking for ncurses.h... no
checking poll.h usability... yes
checking poll.h presence... yes
checking for poll.h... yes
checking process.h usability... no
checking process.h presence... no
checking for process.h... no
checking pthread.h usability... yes
checking pthread.h presence... yes
checking for pthread.h... yes
checking signal.h usability... yes
checking signal.h presence... yes
checking for signal.h... yes
checking stropts.h usability... yes
checking stropts.h presence... yes
checking for stropts.h... yes
checking termios.h usability... yes
checking termios.h presence... yes
checking for termios.h... yes
checking thread.h usability... yes
checking thread.h presence... yes
checking for thread.h... yes
checking for unistd.h... (cached) yes
checking utime.h usability... yes
checking utime.h presence... yes
checking for utime.h... yes
checking sys/audioio.h usability... no
checking sys/audioio.h presence... no
checking for sys/audioio.h... no
checking sys/bsdtty.h usability... no
checking sys/bsdtty.h presence... no
checking for sys/bsdtty.h... no
checking sys/file.h usability... yes
checking sys/file.h presence... yes
checking for sys/file.h... yes
checking sys/loadavg.h usability... no
checking sys/loadavg.h presence... no
checking for sys/loadavg.h... no
checking sys/lock.h usability... yes
checking sys/lock.h presence... yes
checking for sys/lock.h... yes
checking sys/mkdev.h usability... no
checking sys/mkdev.h presence... no
checking for sys/mkdev.h... no
checking sys/modem.h usability... no
checking sys/modem.h presence... no
checking for sys/modem.h... no
checking sys/param.h usability... yes
checking sys/param.h presence... yes
checking for sys/param.h... yes
checking sys/poll.h usability... yes
checking sys/poll.h presence... yes
checking for sys/poll.h... yes
checking sys/select.h usability... yes
checking sys/select.h presence... yes
checking for sys/select.h... yes
checking sys/socket.h usability... yes
checking sys/socket.h presence... yes
checking for sys/socket.h... yes
checking sys/statvfs.h usability... yes
checking sys/statvfs.h presence... yes
checking for sys/statvfs.h... yes
checking for sys/stat.h... (cached) yes
checking sys/time.h usability... yes
checking sys/time.h presence... yes
checking for sys/time.h... yes
checking sys/times.h usability... yes
checking sys/times.h presence... yes
checking for sys/times.h... yes
checking for sys/types.h... (cached) yes
checking sys/un.h usability... yes
checking sys/un.h presence... yes
checking for sys/un.h... yes
checking sys/utsname.h usability... yes
checking sys/utsname.h presence... yes
checking for sys/utsname.h... yes
checking sys/wait.h usability... yes
checking sys/wait.h presence... yes
checking for sys/wait.h... yes
checking pty.h usability... no
checking pty.h presence... no
checking for pty.h... no
checking libutil.h usability... no
checking libutil.h presence... no
checking for libutil.h... no
checking sys/resource.h usability... yes
checking sys/resource.h presence... yes
checking for sys/resource.h... yes
checking netpacket/packet.h usability... no
checking netpacket/packet.h presence... no
checking for netpacket/packet.h... no
checking sysexits.h usability... yes
checking sysexits.h presence... yes
checking for sysexits.h... yes
checking bluetooth.h usability... no
checking bluetooth.h presence... no
checking for bluetooth.h... no
checking bluetooth/bluetooth.h usability... no
checking bluetooth/bluetooth.h presence... no
checking for bluetooth/bluetooth.h... no
checking for dirent.h that defines DIR... yes
checking for library containing opendir... none required
checking whether sys/types.h defines makedev... no
checking for sys/mkdev.h... (cached) no
checking sys/sysmacros.h usability... yes
checking sys/sysmacros.h presence... yes
checking for sys/sysmacros.h... yes
checking for term.h... yes
checking for linux/netlink.h... no
checking for clock_t in time.h... yes
checking for makedev... no
checking Solaris LFS bug... no
checking for mode_t... yes
checking for off_t... yes
checking for pid_t... yes
checking return type of signal handlers... void
checking for size_t... yes
checking for uid_t in sys/types.h... yes
checking for ssize_t... yes
checking for int... yes
checking size of int... 4
checking for long... yes
checking size of long... 4
checking for void *... yes
checking size of void *... 4
checking for short... yes
checking size of short... 2
checking for float... yes
checking size of float... 4
checking for double... yes
checking size of double... 8
checking for fpos_t... yes
checking size of fpos_t... 4
checking for size_t... (cached) yes
checking size of size_t... 4
checking for long long support... yes
checking for long long... yes
checking size of long long... 8
checking for uintptr_t support... no
checking size of off_t... 4
checking whether to enable large file support... no
checking size of time_t... 4
checking for pthread_t... yes
checking size of pthread_t... 4
checking for --enable-toolbox-glue... no
checking for --enable-framework... no
checking for dyld... no
checking SO... .so
checking LDSHARED... $(BINLIBDEST)/config/ld_so_aix $(CC)
-bI:$(BINLIBDEST)/config/python.exp
checking CCSHARED...
checking LINKFORSHARED... -Wl,-bE:Modules/python.exp -lld
checking CFLAGSFORSHARED...
checking SHLIBS... $(LIBS)
checking for dlopen in -ldl... yes
checking for shl_load in -ldld... no
checking for library containing sem_init... none required
checking for textdomain in -lintl... yes
checking for genuine AIX C++ extensions support... no
checking for t_open in -lnsl... no
checking for socket in -lsocket... no
checking for --with-libs... no
checking for --with-system-ffi... no
checking for --with-signal-module... yes
checking for --with-dec-threads... no
checking for --with-threads... yes
checking if PTHREAD_SCOPE_SYSTEM is supported... yes
checking for pthread_sigmask... yes
checking if --enable-ipv6 is specified... no
checking for --with-doc-strings... yes
checking for --with-tsc... no
checking for --with-pymalloc... yes
checking for --with-wctype-functions... no
checking for dlopen... yes
checking DYNLOADFILE... dynload_shlib.o
checking MACHDEP_OBJS... MACHDEP_OBJS
checking for alarm... yes
checking for bind_textdomain_codeset... no
checking for chown... yes
checking for clock... yes
checking for confstr... yes
checking for ctermid... yes
checking for execv... yes
checking for fork... yes
checking for fpathconf... yes
checking for ftime... yes
checking for ftruncate... yes
checking for gai_strerror... yes
checking for getgroups... yes
checking for getlogin... yes
checking for getloadavg... no
checking for getpeername... yes
checking for getpgid... yes
checking for getpid... yes
checking for getpriority... yes
checking for getpwent... yes
checking for getspnam... no
checking for getspent... no
checking for getsid... yes
checking for getwd... yes
checking for kill... yes
checking for killpg... yes
checking for lchown... yes
checking for lstat... yes
checking for mkfifo... yes
checking for mknod... yes
checking for mktime... yes
checking for mremap... no
checking for nice... yes
checking for pathconf... yes
checking for pause... yes
checking for plock... yes
checking for poll... yes
checking for pthread_init... yes
checking for putenv... yes
checking for readlink... yes
checking for realpath... yes
checking for select... yes
checking for setegid... yes
checking for seteuid... yes
checking for setgid... yes
checking for setlocale... yes
checking for setregid... yes
checking for setreuid... yes
checking for setsid... yes
checking for setpgid... yes
checking for setpgrp... yes
checking for setuid... yes
checking for setvbuf... yes
checking for snprintf... yes
checking for sigaction... yes
checking for siginterrupt... yes
checking for sigrelse... yes
checking for strftime... yes
checking for sysconf... yes
checking for tcgetpgrp... yes
checking for tcsetpgrp... yes
checking for tempnam... yes
checking for timegm... no
checking for times... yes
checking for tmpfile... yes
checking for tmpnam... yes
checking for tmpnam_r... no
checking for truncate... yes
checking for uname... yes
checking for unsetenv... yes
checking for utimes... yes
checking for waitpid... yes
checking for wait3... yes
checking for wait4... yes
checking for wcscoll... yes
checking for _getpty... no
checking for chroot... yes
checking for link... yes
checking for symlink... yes
checking for fchdir... yes
checking for fsync... yes
checking for fdatasync... yes
checking for ctermid_r... no
checking for flock... no
checking for getpagesize... yes
checking for true... true
checking for inet_aton in -lc... yes
checking for inflateCopy in -lz... yes
checking for hstrerror... no
checking for inet_aton... yes
checking for inet_pton... yes
checking for setgroups... yes
checking for openpty... no
checking for openpty in -lutil... no
checking for openpty in -lbsd... no
checking for forkpty... no
checking for forkpty in -lutil... no
checking for forkpty in -lbsd... no
checking for fseek64... no
checking for fseeko... yes
checking for fstatvfs... yes
checking for ftell64... no
checking for ftello... yes
checking for statvfs... yes
checking for dup2... yes
checking for getcwd... yes
checking for strdup... yes
checking for strerror... yes
checking for memmove... yes
checking for getpgrp... yes
checking for setpgrp... (cached) yes
checking for gettimeofday... yes
checking for major... yes
checking for getaddrinfo... yes
checking getaddrinfo bug... buggy
checking for getnameinfo... yes
checking whether time.h and sys/time.h may both be included... yes
checking whether struct tm is in sys/time.h or time.h... time.h
checking for struct tm.tm_zone... no
checking for tzname... yes
checking for struct stat.st_rdev... yes
checking for struct stat.st_blksize... yes
checking for struct stat.st_flags... no
checking for struct stat.st_gen... yes
checking for struct stat.st_birthtime... no
checking for struct stat.st_blocks... yes
checking for time.h that defines altzone... no
checking whether sys/select.h and sys/time.h may both be included...
yes
checking for addrinfo... yes
checking for sockaddr_storage... yes
checking whether char is unsigned... yes
checking for an ANSI C-conforming const... yes
checking for working volatile... yes
checking for working signed char... yes
checking for prototypes... yes
checking for variable length prototypes and stdarg.h... yes
checking for socketpair... yes
checking if sockaddr has sa_len member... yes
checking whether va_list is an array... no
checking for gethostbyname_r... yes
checking gethostbyname_r with 6 args... no
checking gethostbyname_r with 5 args... no
checking gethostbyname_r with 3 args... yes
checking for __fpu_control... no
checking for __fpu_control in -lieee... no
checking for --with-fpectl... no
checking for --with-libm=STRING... default LIBM="-lm"
checking for --with-libc=STRING... default LIBC=""
checking for hypot... yes
checking wchar.h usability... yes
checking wchar.h presence... yes
checking for wchar.h... yes
checking for wchar_t... yes
checking size of wchar_t... 2
checking for UCS-4 tcl... no
checking whether wchar_t is signed... no
checking what type to use for unicode... wchar_t
checking whether byte ordering is bigendian... yes
checking whether right shift extends the sign bit... yes
checking for getc_unlocked() and friends... yes
checking for readline in -lreadline... yes
checking for rl_callback_handler_install in -lreadline... yes
checking for rl_pre_input_hook in -lreadline... no
checking for rl_completion_matches in -lreadline... yes
checking for broken nice()... no
checking for broken poll()... no
checking for struct tm.tm_zone... (cached) no
checking for tzname... (cached) yes
checking for working tzset()... yes
checking for tv_nsec in struct stat... no
checking for tv_nsec2 in struct stat... no
checking whether mvwdelch is an expression... yes
checking whether WINDOW has _flags... yes
checking for is_term_resized... no
checking for resize_term... no
checking for resizeterm... no
checking for /dev/ptmx... no
checking for /dev/ptc... yes
checking for %zd printf() format support... yes
checking for socklen_t... yes
checking for build directories... done
configure: creating ./config.status
config.status: creating Makefile.pre
config.status: creating Modules/Setup.config
config.status: creating pyconfig.h
config.status: pyconfig.h is unchanged
creating Modules/Setup
creating Modules/Setup.local
creating Makefile
svnadm /svn/build/python-2.5.0>make
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Modules/python.o ./Modules/python.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Modules/_typesmodule.o Modules/_typesmodule.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/acceler.o Parser/acceler.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/grammar1.o Parser/grammar1.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/listnode.o Parser/listnode.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/node.o Parser/node.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/parser.o Parser/parser.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/parsetok.o Parser/parsetok.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/bitset.o Parser/bitset.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/metagrammar.o Parser/metagrammar.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/firstsets.o Parser/firstsets.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/grammar.o Parser/grammar.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/pgen.o Parser/pgen.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/myreadline.o Parser/myreadline.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/tokenizer.o Parser/tokenizer.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/abstract.o Objects/abstract.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/boolobject.o Objects/boolobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/bufferobject.o Objects/bufferobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/cellobject.o Objects/cellobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/classobject.o Objects/classobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/cobject.o Objects/cobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/codeobject.o Objects/codeobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/complexobject.o Objects/complexobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/descrobject.o Objects/descrobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/enumobject.o Objects/enumobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/exceptions.o Objects/exceptions.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/genobject.o Objects/genobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/fileobject.o Objects/fileobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/floatobject.o Objects/floatobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/frameobject.o Objects/frameobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/funcobject.o Objects/funcobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/intobject.o Objects/intobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/iterobject.o Objects/iterobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/listobject.o Objects/listobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/longobject.o Objects/longobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/dictobject.o Objects/dictobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/methodobject.o Objects/methodobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/moduleobject.o Objects/moduleobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/object.o Objects/object.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/obmalloc.o Objects/obmalloc.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/rangeobject.o Objects/rangeobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/setobject.o Objects/setobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/sliceobject.o Objects/sliceobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/stringobject.o Objects/stringobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/structseq.o Objects/structseq.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/tupleobject.o Objects/tupleobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/typeobject.o Objects/typeobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/weakrefobject.o Objects/weakrefobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/unicodeobject.o Objects/unicodeobject.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Objects/unicodectype.o Objects/unicodectype.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/Python-ast.o Python/Python-ast.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/asdl.o Python/asdl.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o Python/ast.o
Python/ast.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/bltinmodule.o Python/bltinmodule.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/ceval.o Python/ceval.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/mysnprintf.o Python/mysnprintf.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/tokenizer_pgen.o Parser/tokenizer_pgen.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/printgrammar.o Parser/printgrammar.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Parser/pgenmain.o Parser/pgenmain.c
cc_r -DNDEBUG -O   Parser/acceler.o Parser/grammar1.o Parser/listnode.o
Parser/node.o Parser/parser.o Parser/parsetok.o Parser/bitset.o
Parser/metagrammar.o Parser/firstsets.o Parser/grammar.o Parser/pgen.o
Objects/obmalloc.o Python/mysnprintf.o Parser/tokenizer_pgen.o
Parser/printgrammar.o Parser/pgenmain.o -ldl  -o Parser/pgen
Parser/pgen ./Grammar/Grammar ./Include/graminit.h ./Python/graminit.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/compile.o Python/compile.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/codecs.o Python/codecs.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/errors.o Python/errors.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/frozen.o Python/frozen.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/frozenmain.o Python/frozenmain.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/future.o Python/future.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/getargs.o Python/getargs.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/getcompiler.o Python/getcompiler.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/getcopyright.o Python/getcopyright.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/getmtime.o Python/getmtime.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE
-DPLATFORM='"aix5"' -o Python/getplatform.o ./Python/getplatform.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/getversion.o Python/getversion.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/graminit.o Python/graminit.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/import.o Python/import.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -I. -o
Python/importdl.o ./Python/importdl.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/marshal.o Python/marshal.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/modsupport.o Python/modsupport.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/mystrtoul.o Python/mystrtoul.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/pyarena.o Python/pyarena.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/pyfpe.o Python/pyfpe.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/pystate.o Python/pystate.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/pythonrun.o Python/pythonrun.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/structmember.o Python/structmember.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/symtable.o Python/symtable.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/sysmodule.o Python/sysmodule.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/traceback.o Python/traceback.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/getopt.o Python/getopt.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/pystrtod.o Python/pystrtod.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/dynload_shlib.o Python/dynload_shlib.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Python/thread.o Python/thread.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Modules/config.o Modules/config.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE
-DPYTHONPATH='":plat-aix5:lib-tk"' \
        -DPREFIX='"/svn"' \
        -DEXEC_PREFIX='"/svn"' \
        -DVERSION='"2.5"' \
        -DVPATH='""' \
        -o Modules/getpath.o ./Modules/getpath.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Modules/main.o Modules/main.c
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
Modules/gcmodule.o Modules/gcmodule.c
cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
./Modules/threadmodule.c -o Modules/threadmodule.o
cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
./Modules/signalmodule.c -o Modules/signalmodule.o
cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
./Modules/posixmodule.c -o Modules/posixmodule.o
cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
./Modules/errnomodule.c -o Modules/errnomodule.o
cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
./Modules/pwdmodule.c -o Modules/pwdmodule.o
cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
./Modules/_sre.c -o Modules/_sre.o
cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
./Modules/_codecsmodule.c -o Modules/_codecsmodule.o
cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
./Modules/zipimport.c -o Modules/zipimport.o
cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
./Modules/symtablemodule.c -o Modules/symtablemodule.o
cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
./Modules/xxsubtype.c -o Modules/xxsubtype.o
cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE
-DSVNVERSION=\"`LANG=C svnversion .`\" -o Modules/getbuildinfo.o
./Modules/getbuildinfo.c
rm -f libpython2.5.a
ar cr libpython2.5.a Modules/getbuildinfo.o
ar cr libpython2.5.a Modules/_typesmodule.o
ar cr libpython2.5.a Parser/acceler.o Parser/grammar1.o
Parser/listnode.o Parser/node.o Parser/parser.o Parser/parsetok.o
Parser/bitset.o Parser/metagrammar.o Parser/firstsets.o
Parser/grammar.o Parser/pgen.o Parser/myreadline.o Parser/tokenizer.o
ar cr libpython2.5.a Objects/abstract.o Objects/boolobject.o
Objects/bufferobject.o Objects/cellobject.o Objects/classobject.o
Objects/cobject.o Objects/codeobject.o Objects/complexobject.o
Objects/descrobject.o Objects/enumobject.o Objects/exceptions.o
Objects/genobject.o Objects/fileobject.o Objects/floatobject.o
Objects/frameobject.o Objects/funcobject.o Objects/intobject.o
Objects/iterobject.o Objects/listobject.o Objects/longobject.o
Objects/dictobject.o Objects/methodobject.o Objects/moduleobject.o
Objects/object.o Objects/obmalloc.o Objects/rangeobject.o
Objects/setobject.o Objects/sliceobject.o Objects/stringobject.o
Objects/structseq.o Objects/tupleobject.o Objects/typeobject.o
Objects/weakrefobject.o Objects/unicodeobject.o Objects/unicodectype.o
ar cr libpython2.5.a Python/Python-ast.o Python/asdl.o Python/ast.o
Python/bltinmodule.o Python/ceval.o Python/compile.o Python/codecs.o
Python/errors.o Python/frozen.o Python/frozenmain.o Python/future.o
Python/getargs.o Python/getcompiler.o Python/getcopyright.o
Python/getmtime.o Python/getplatform.o Python/getversion.o
Python/graminit.o Python/import.o Python/importdl.o Python/marshal.o
Python/modsupport.o Python/mystrtoul.o Python/mysnprintf.o
Python/pyarena.o Python/pyfpe.o Python/pystate.o Python/pythonrun.o
Python/structmember.o Python/symtable.o Python/sysmodule.o
Python/traceback.o Python/getopt.o Python/pystrtod.o
Python/dynload_shlib.o  Python/thread.o
ar cr libpython2.5.a Modules/config.o Modules/getpath.o Modules/main.o
Modules/gcmodule.o
ar cr libpython2.5.a Modules/threadmodule.o  Modules/signalmodule.o
Modules/posixmodule.o  Modules/errnomodule.o  Modules/pwdmodule.o
Modules/_sre.o  Modules/_codecsmodule.o  Modules/zipimport.o
Modules/symtablemodule.o  Modules/xxsubtype.o
ranlib libpython2.5.a
./Modules/makexp_aix Modules/python.exp . libpython2.5.a;  cc_r
-Wl,-bE:Modules/python.exp -lld -o python \
                Modules/python.o \
                libpython2.5.a -ldl    -lm
ld: 0711-317 ERROR: Undefined symbol: .__floor
ld: 0711-317 ERROR: Undefined symbol: .__ceil
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more
information.
make: *** [python] Error 8
svnadm /svn/build/python-2.5.0>

I ran the last line again adding the -bloadmap option.  The results of
this are below.

(ld): halt 4
(ld): setfflag 4
(ld): savename python
(ld): filelist 9 2
(ld): i /lib/crt0.o
(ld): lib /usr/lib/libld.a
(ld): i Modules/python.o
(ld): i libpython2.5.a
(ld): lib /usr/lib/libdl.a
(ld): lib /usr/lib/libm.a
(ld): lib /usr/lib/libxlopt.a
(ld): lib /usr/lib/libpthreads.a
(ld): lib /usr/lib/threads/libc.a
LIBRARY: Shared object libdl.a[shr.o]: 4 symbols imported.
LIBRARY: Shared object libpthreads.a[shr_comm.o]: 173 symbols imported.
LIBRARY: Shared object libpthreads.a[shr_xpg5.o]: 152 symbols imported.
LIBRARY: Shared object libc.a[shr.o]: 2800 symbols imported.
LIBRARY: Shared object libc.a[meth.o]: 2 symbols imported.
LIBRARY: Shared object libc.a[posix_aio.o]: 20 symbols imported.
LIBRARY: Shared object libc.a[aio.o]: 14 symbols imported.
LIBRARY: Shared object libc.a[pse.o]: 5 symbols imported.
LIBRARY: Shared object libc.a[dl.o]: 4 symbols imported.
LIBRARY: Shared object libc.a[pty.o]: 1 symbols imported.
FILELIST: Number of previously inserted files processed: 9
(ld): exports Modules/python.exp
EXPORTS: Symbols exported: 1034
(ld): resolve
RESOLVE: 5597 of 15450 symbols were kept.
(ld): addgl /usr/lib/glink.o
ADDGL: Glink code added for 178 symbols.
(ld): er full
ld: 0711-318 ERROR: Undefined symbols were found.
        The following symbols are in error:
 Symbol                    Inpndx  TY CL Source-File(Object-File) OR
Import-File{Shared-object}
                              RLD: Address  Section  Rld-type
Referencing Symbol

----------------------------------------------------------------------------------------------
 .__floor                  [392]   ER PR
Objects/floatobject.c(libpython2.5.a[floatobject.o])
                                   00000b80 .text    R_RBR    [38]
<.float_pow>
                                   00000c28 .text    R_RBR    [38]
<.float_pow>
                                   00000ff4 .text    R_RBR    [42]
<.float_divmod>
 .__floor                  [404]   ER PR
Objects/complexobject.c(libpython2.5.a[complexobject.o])
                                   0000179c .text    R_RBR    [42]
<.complex_divmod>
                                   00001a2c .text    R_RBR    [44]
<.complex_remainder>
 .__floor                  [552]   ER PR
Python/bltinmodule.c(libpython2.5.a[bltinmodule.o])
                                   00000bec .text    R_RBR    [24]
<.builtin_round>
 .__ceil                   [554]   ER PR
Python/bltinmodule.c(libpython2.5.a[bltinmodule.o])
                                   00000c2c .text    R_RBR    [24]
<.builtin_round>
ER: The return code is 8.

I noticed the following in /usr/include/math.h, but am not sure how
this relates.

#ifdef __IBMC__
#if (__xlC__ >= 0x0600) /* VAC version 6 and above */
#define floor(__x)        __floor(__x)
#define ceil(__x)         __ceil(__x)
#endif /* __xlC__ >= 0x0600 */
#endif /* __IBMC__ */

Does anyone know what I am doing wrong here.  Any help is appreciated.

Justin



From webraviteja at gmail.com  Thu Jan 25 05:35:57 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 25 Jan 2007 02:35:57 -0800
Subject: While loop with "or"? Please help!
In-Reply-To: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
References: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
Message-ID: <1169721357.871001.262810@v33g2000cwv.googlegroups.com>


>     while usrinp != "y" or "Y" or "N" or "n": <<<<----PROBLEM

Correct way:
while usrinp != "y" or usrinp != "Y" or usrinp != "N" or usrinp != "n":
There has to be a boolean evaluation on both sides of or.

Or in this case:
while usrinp not in ['Y', 'y', 'N', 'n']:

Ravi Teja.



From nospam.notospam at gmail.com  Sat Jan 20 02:58:28 2007
From: nospam.notospam at gmail.com (Drew)
Date: 19 Jan 2007 23:58:28 -0800
Subject: multiple file deletes using ftp.delete
In-Reply-To: <1169277378.015620.208910@51g2000cwl.googlegroups.com>
References: <1169277378.015620.208910@51g2000cwl.googlegroups.com>
Message-ID: <1169279908.415360.175580@q2g2000cwa.googlegroups.com>

On Jan 19, 11:16 pm, "Drew" <nospam.notos... at gmail.com> wrote:
> Hi all
> I'm fairly new to python so please forgive my lack of comprehension of
> the obvious.
>
> I'm writing a script to ftp files to a server. This script will run
> weekly. Part of the script first deletes the previous weeks files. The
> problem is I'm never sure of the exact number and full name of the
> files that need to be deleted. All the files start with the same string
> but have different extensions (eg drew.1 drew.2 drew.tmp drew.hlp). So
> I was wondering if anybody knows how to use a wild card similar to * in
> UNIX to do the delete? Something like:
>
> ftp.delete("drew.*")
>
> Any help or suggestions would be greatly appreciated.
>
> Drew Dowling

I should have summed if up thus: I'm trying to find a way to issue the
ftp mdelete command in python.



From tjreedy at udel.edu  Wed Jan 17 03:08:40 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 17 Jan 2007 03:08:40 -0500
Subject: How can i eval subindex on list[ ][ ] ?
References: <1168988937.512029.192800@q2g2000cwa.googlegroups.com>
	<eojnn5$1vo$1@zinnia.noc.ucla.edu>
Message-ID: <eokli8$bhl$1@sea.gmane.org>


"James Stroud" <jstroud at mbi.ucla.edu> wrote in message 
news:eojnn5$1vo$1 at zinnia.noc.ucla.edu...
| jairodsl wrote:
| > Excuse me, i was trying in too many ways but i couldnt access subindex
| > on a list , the problem is the next:
| >
| > I have
| >
| > indif=[[0,'A'],[1,'B'],[2,'C'],[3,'D']]
| >
| > and
| >
| > indic=[[0,'B'],[1,'C'],[2,'D'],[3,'E']]
| >
| > i need to eval if indic[i][j] is equal to indif[i][j]
| >
| > I used a double for but i had got "list index out of range". How can i
| > do ???
| >
| > Thanks a lot,
| >
| > Cordially,
| >
| > jDSL
| >
|
| py> i = 1
| py> j = 0
| py> indif[i][j] == indic[i][j]
| True

Or, if you mean for every i and j, just

indif == indic

and let the types equality method do the work for you. 





From kernel1983 at gmail.com  Tue Jan 16 23:34:23 2007
From: kernel1983 at gmail.com (kernel1983)
Date: 16 Jan 2007 20:34:23 -0800
Subject: How can I write code using FP
In-Reply-To: <eok7jn$ina$1@bunyip2.cc.uq.edu.au>
References: <1169003899.592015.300290@s34g2000cwa.googlegroups.com>
	<eok7jn$ina$1@bunyip2.cc.uq.edu.au>
Message-ID: <1169008463.722222.289130@q2g2000cwa.googlegroups.com>

yeah! that's easy! althought no so clear

a = lambda x,y:(x,y)
b = lambda y:a(1,y)

a(1,2)
(1,2)

b(2)
(1,2)

On 1?17?, ??12?10?, Alejandro Dubrovsky
<dubrov... at physics.uq.edu.au> wrote:
> kernel1983 wrote:
> > In Function Program?Language can use like this:
>
> > define a function:
> > f = lambda x,y:x,y
>
> > then we use f to define another function:
> > f2 = f(1)
> > the f2 should equal to:
> > f2=lambda y:1,y
>
> > we should be able call f2 with one parameter:f2(2)
> > just return 1,2
>
> > but how can I implement the characteristic in Python??I think it could
> > do like this but HOW-TO?If you are using python 2.5, then you can use functools.partial, otherwise
> lookup one of the many curry implementations, like the ones found inhttp://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52549
>
> One found in the comments of that page by Scott David Daniels:
>
> def curry(*args, **kwargs):
>     function, args = args[0], args[1:]
>     def result(*rest, **kwrest):
>         combined = kwargs.copy()
>         combined.update(kwrest)
>         return function(*args + rest, **combined)
>     return result
>
> so, in your case:
> 
> f = lambda x,y: (x,y)
> f2 = functools.partial(f,1)>>> f2(3)1,3



From Sardaukary at gmail.com  Mon Jan  8 07:53:54 2007
From: Sardaukary at gmail.com (Sardaukary at gmail.com)
Date: 8 Jan 2007 04:53:54 -0800
Subject: General Question About Python
In-Reply-To: <1168254451.098796.144790@42g2000cwt.googlegroups.com>
References: <1168254451.098796.144790@42g2000cwt.googlegroups.com>
Message-ID: <1168260834.183457.183520@51g2000cwl.googlegroups.com>

Enteng wrote:
> To those who program in python, what programs do you do?
> Also what community projects are you involved in(OSS probably)?
> Will mastering the language land me a job?
>
> I'm thinking about learning the language as a hobby. Just curious :)

If you have any programming experience you'll be able to pick up
Python in an afternoon.   It's a very easy language to learn and
you'll be writing useful programs in no time.

Sadly I doubt learning it alone will land you a job (which is why I
forced myself to learn Java C++ and even PHP), but once you do have
that job, there's a 90% chance Python will help you get things done
in that job.  It's just a really fun and useful language with a huge
amount of well written libraries.

Check out www.pythonchallenge.com when you know the basics,  but be
warned it's quite addictive!



From ximolistas at yahoo.es  Thu Jan 18 14:53:35 2007
From: ximolistas at yahoo.es (Ximo Nadal)
Date: Thu, 18 Jan 2007 20:53:35 +0100
Subject: Python Web Frameworks
In-Reply-To: <1169048071.353887.279160@q2g2000cwa.googlegroups.com>
References: <1169048071.353887.279160@q2g2000cwa.googlegroups.com>
Message-ID: <cfQrh.11936$8f.1598@news.ono.com>

Shortash wrote:
> Hi Gurus,
> 
> I want to build a Python web app but im not sure which one to go for. I
> prefer something like asp.Net , which would allow me to fully seperate
> the presentation layer from the logic. Please advise?
> 
> thanks,
> 
> "Shortash'
> 
Hi,

Look at <http://wiki.python.org/moin/WebFrameworks> there are same of them.

Now I'm studing karrigell, it's very interesting.

bye,

-- 
Ximo Nadal <ximolistas at yahoo.es>
Powered by Debian GNU/Linux <www.debian.org>


From timr at probo.com  Tue Jan 23 02:30:44 2007
From: timr at probo.com (Tim Roberts)
Date: Tue, 23 Jan 2007 07:30:44 GMT
Subject: Help with 'popen'
References: <1169436640.161806.111510@38g2000cwa.googlegroups.com>
	<ep1jrc$sla$1@daisy.noc.ucla.edu>
Message-ID: <f9ebr25tfqbfd6qscru89k65m6pr42kaj7@4ax.com>

James Stroud <jstroud at mbi.ucla.edu> wrote:
>stephen_b wrote:
>
>> Can someone let me know why this won't work? Thanks.
>> 
>>>>>from os import popen
>>>>>popen('export asdfasdf=hello').read()
>> ''
>>>>>popen('echo $asdfasdf').read()
>> '\n'
>
>Python starts a new shell for each command, so your environment variable 
>is lost. You probably want this, which makes the variable "permanent".
>
>py> import os
>py> os.environ['asdfasdf'] = 'hello'
>py> os.popen('echo $asdfasdf').read()
>'hello\n'

For completeness, let us anticipate the followup question and point out
that "permanent" here means "for this process and any processes that it
spawns".  Once the Python session ends, the "asdfasdf" will be lost.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From horpner at yahoo.com  Wed Jan 10 11:17:20 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Jan 2007 17:17:20 +0100
Subject: Need startup suggestions for writing a MSA viewer GUI in python
References: <eo2uhr$ffn$1@news.lysator.liu.se>
	<XK7ph.1274$qA7.944@newsfe15.lga>
Message-ID: <slrneqa4hl.1jc.horpner@FIAD06.norwich.edu>

On 2007-01-10, hg <hg at nospam.org> wrote:
> Joel Hedlund wrote:
>> Thanks for taking the time!
>> /Joel Hedlund
>
> I do not know if PyGtk and PyQT have demos, but wxPython does
> and includes PyPlot: an easy way to look at the basic features.

PyQT does come with an impressive plethora of demos.

-- 
Neil Cerutti
The concert held in Fellowship Hall was a great success. Special thanks are
due to the minister's daughter, who labored the whole evening at the piano,
which as usual fell upon her. --Church Bulletin Blooper


From mike.klaas at gmail.com  Wed Jan 24 19:00:48 2007
From: mike.klaas at gmail.com (Klaas)
Date: 24 Jan 2007 16:00:48 -0800
Subject: The reliability of python threads
In-Reply-To: <mailman.3105.1169664198.32031.python-list@python.org>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
Message-ID: <1169683248.853997.309590@m58g2000cwm.googlegroups.com>



On Jan 24, 10:43 am, "Carl J. Van Arsdall" <cvanarsd... at mvista.com>
wrote:
> Chris Mellon wrote:
> > On 24 Jan 2007 18:21:38 GMT, Nick Maclaren <n... at cus.cam.ac.uk> wrote:
>
> >> [snip]
>
> > I'm aware of the issues with the POSIX threading model. I still stand
> > by my statement - bringing up the problems with the provability of
> > correctness in the POSIX model amounts to FUD in a discussion of
> > actual problems with actual code.
>
> > Logic and programming errors in user code are far more likely to be
> > the cause of random errors in a threaded program than theoretical
> > (I've never come across a case in practice) issues with the POSIX
> > standard.Yea, typically I would think that.  The problem I am seeing is
> incredibly intermittent.  Like a simple pyro server that gives me a
> problem maybe every three or four months.  Just something funky will
> happen to the state of the whole thing, some bad data, i'm having an
> issue tracking it down and some more experienced programmers mentioned
> that its most likely a race condition.  THe thing is, I'm really not
> doing anything too crazy, so i'm having difficult tracking it down.  I
> had heard in the past that there may be issues with threads, so I
> thought to investigate this side of things.
>
> It still proves difficult, but reassurance of the threading model helps
> me focus my efforts.
>
> > Emphasizing this means that people will tend to ignore bugs as being
> > "the fault of POSIX" rather than either auditing their code more
> > carefully, or avoiding threads entirely (the second being what I
> > suspect your goal is).
>
> > As a last case, I should point out that while the POSIX memory model
> > can't be proven safe, concrete implementations do not necessarily
> > suffer from this problem.Would you consider the Linux implementation of threads to be concrete?
>
> -carl
>
> --
>
> Carl J. Van Arsdall
> cvanarsd... at mvista.com
> Build and Release
> MontaVista Software



From kuldjlevelet at gmail.com  Thu Jan 18 07:21:18 2007
From: kuldjlevelet at gmail.com (0k-)
Date: 18 Jan 2007 04:21:18 -0800
Subject: classes: need for an explanation
In-Reply-To: <eonoa0$dlm$01$1@news.t-online.com>
References: <1169121502.779509.138890@m58g2000cwm.googlegroups.com>
	<eonoa0$dlm$01$1@news.t-online.com>
Message-ID: <1169122878.476800.109330@l53g2000cwa.googlegroups.com>

thanks for the quick reply, Peter! :)



From steve at holdenweb.com  Fri Jan 26 12:06:11 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 26 Jan 2007 17:06:11 +0000
Subject: DOS, UNIX and tabs
In-Reply-To: <aa6cp2htv1gijmusbhua29ac0ji2ojlv4m@4ax.com>
References: <1167243140.687557.93320@f1g2000cwa.googlegroups.com>	<1167244483.792673.132220@42g2000cwt.googlegroups.com>	<12p5ffrsdo6v088@corp.supernews.com>	<1167245005.678672.196280@73g2000cwn.googlegroups.com>
	<aa6cp2htv1gijmusbhua29ac0ji2ojlv4m@4ax.com>
Message-ID: <epdcf5$b29$1@sea.gmane.org>

Tim Roberts wrote:
> "Ben" <Benjamin.Barker at gmail.com> wrote:
>> Great - that worked.Thanks!
>> Is that a general method in linux you can always use to redirect
>> standard output to a file?
> 
> Works in Windows, too.

For some value of "work" :)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From NO_Kroeger at gmx.de  Thu Jan 25 16:40:57 2007
From: NO_Kroeger at gmx.de (=?ISO-8859-1?Q?Nils_Oliver_Kr=F6ger?=)
Date: Thu, 25 Jan 2007 22:40:57 +0100
Subject: pdf to text
In-Reply-To: <epb638$gd4$1@solaris.cc.vt.edu>
References: <epb638$gd4$1@solaris.cc.vt.edu>
Message-ID: <45B923E9.1050109@gmx.de>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

have a look at the pdflib (www.pdflib.com). Their Text Extraction
Toolkit might be what you are looking for, though I'm not sure whether
you can use it detached from the pdflib itself.

hth

Nils

tubby schrieb:
> I know this question comes up a lot, so here goes again. I want to read 
> text from a PDF file, run re searches on the text, etc. I do not care 
> about layout, fonts, borders, etc. I just want the text. I've been 
> reading Adobe's PDF Reference Guide and I'm beginning to develop a 
> better understanding of PDF in general, but I need a bit of help... this 
> seems like it should be easier than it is. Here's some code:
> 
> import zlib
> 
> fp = open('test.pdf', 'rb')
> bytes = []
> while 1:
>      byte = fp.read(1)
>      #print byte
>      bytes.append(byte)
>      if not byte:
>          break
> 
> for byte in bytes:
> 
>      op = open('pdf.txt', 'a')
> 
>      dco = zlib.decompressobj()
> 
>      try:
>          s = dco.decompress(byte)
>          #print >> op, s
>          print s
>      except Exception, e:
>          print e
> 
>      op.close()
> 
> fp.close()
> 
> I know the text is compressed... that it would have stream and endstream 
> makers and BT (Begin Text) and ET (End Text) and that the uncompressed 
> text is enclosed in parenthesis (this is my text). Has anyone here done 
> this in a simple fashion? I've played with the pyPdf library some, but 
> it seems overly complex for my needs (merge PDFs, write PDFs, etc). I 
> just want a simple PDF text extractor.
> 
> Thanks

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.3 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFFuSPozvGJy8WEGTcRAnY0AJ0VZez3XRbLm/JXZKhn/rgHP0R3qwCfWAnT
EupBECHab2kG33Rmnh+xf74=
=INM5
-----END PGP SIGNATURE-----


From jeremit0 at gmail.com  Thu Jan  4 23:02:06 2007
From: jeremit0 at gmail.com (jeremito)
Date: 4 Jan 2007 20:02:06 -0800
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <mailman.2307.1167969091.32031.python-list@python.org>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<mailman.2307.1167969091.32031.python-list@python.org>
Message-ID: <1167969726.159675.226260@42g2000cwt.googlegroups.com>


Gabriel Genellina wrote:
> At Thursday 4/1/2007 23:52, jeremito wrote:
>
> >I am writing a class that is intended to be subclassed.  What is the
> >proper way to indicate that a sub class must override a method?
>
> If any subclass *must* override a method, raise NotImplementedError
> in the base class (apart from documenting how your class is supposed
> to be used).
>
>
> --
> Gabriel Genellina
> Softlab SRL
>

Thanks, that's what I needed.  Since I am a complete novice at
Exceptions, I'll have to learn about it.
Jeremy



From skip at pobox.com  Sun Jan 14 09:59:12 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 14 Jan 2007 08:59:12 -0600
Subject: Threaded for loop
In-Reply-To: <1168750177.856791.85730@s34g2000cwa.googlegroups.com>
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
	<7xr6ty8ugv.fsf@ruckus.brouhaha.com>
	<1168750177.856791.85730@s34g2000cwa.googlegroups.com>
Message-ID: <17834.17728.999793.401498@montanaro.dyndns.org>


    John> Damn! That is bad news. So even if caclulate is independent for
    John> (i,j) and is computable on separate CPUs (parts of it are CPU
    John> bound, parts are IO bound) python cant take advantage of this?

It will help if parts are I/O bound, presuming the threads which block
release the global interpreter lock (GIL).

There is a module in development (processing.py) that provides an API like
the threading module but that uses processes under the covers:

    http://mail.python.org/pipermail/python-dev/2006-October/069297.html

You might find that an interesting alternative.

Skip



From martin at v.loewis.de  Mon Jan  8 13:47:13 2007
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Mon, 08 Jan 2007 19:47:13 +0100
Subject: Module to read svg
In-Reply-To: <mailman.2409.1168254647.32031.python-list@python.org>
References: <1168225193.883421.185140@s80g2000cwa.googlegroups.com>	<45a1f746$0$27874$9b622d9e@news.freenet.de>
	<mailman.2409.1168254647.32031.python-list@python.org>
Message-ID: <45A291B1.7070509@v.loewis.de>

Robert Kern schrieb:
>>> Does anyone know if there's an actual free implementation of this?
>> For the dom module in it, xml.dom.minidom should work. Depending on
>> your processing needs, that might be sufficient.
> 
> I don't think it quite fits what the OP is asking for. SVG defines some non-XML
> structure for some of its contents. For example:
> 
>   <polyline points="100,200 100,100" />
> 
> The OP is asking for a module that would parse the "points" attribute into a list:
> 
>   [(100.0, 200.0), (100.0, 100.0)]

Sure, but he also specifically asked for an implementation of

http://www.w3.org/TR/SVGMobile12/python-binding.html

minidom *is* such an implementation (at least of a subset). If I
was to implement the entire thing, I'd base it on top of minidom:
SVGDocument needs to inherit from Document, and SVGSVGElement
needs to inherit from SVGLocatableElement needs to inherit from
SVGElement needs to inherit from Element.

Regards,
Martin


From laurent.pointal at limsi.fr  Thu Jan 11 03:20:40 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 11 Jan 2007 09:20:40 +0100
Subject: Read from database, write to another database, simultaneously
In-Reply-To: <50l9dlF1fuc1sU1@mid.individual.net>
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
	<50l9dlF1fuc1sU1@mid.individual.net>
Message-ID: <eo4sor$du4$1@upsn250.cri.u-psud.fr>

Bjoern Schliessmann a ?crit :
> Sean Davis wrote:
> 
>> The author of one of the python database clients mentioned that
>> using one thread to retrieve the data from the oracle database and
>> another to insert the data into postgresql with something like a
>> pipe between the two threads might make sense, keeping both IO
>> streams busy.
> 
> IMHO he's wrong. Network interaction is quite slow compared with CPU
> performance, so there's no gain (maybe even overhead due to thread
> management and locking stuff). That's true even on multiprocessor
> machines, not only because there's almost nothing to compute but
> only IO traffic. CMIIW.


Not so sure, there is low CPU in the Python script, but there may be
CPU+disk activity on the database sides [with cache management and other
optimizations on disk access].
So, with a reader thread and a writer thread, he can have a select on a
database performed in parallel with an insert on the other database.
After, he must know if the two databases use same disks, same
controller, same host... or not.

But, if its only a do-once job, maybe the optimization is net really
necessary.


From nyenyec at gmail.com  Mon Jan  8 23:17:51 2007
From: nyenyec at gmail.com (nyenyec)
Date: 8 Jan 2007 20:17:51 -0800
Subject: re.sub and re.MULTILINE
Message-ID: <1168316270.996407.226910@s80g2000cwa.googlegroups.com>

I feel like a complete idiot but I can't figure out why re.sub won't
match multiline strings:

This works:
>>> re.search("^foo", "\nfoo", re.MULTILINE)
<_sre.SRE_Match object at 0x6c448>

This doesn't. No replacement:
>>> re.sub("^foo", "bar", "\nfoo", re.MULTILINE)
'\nfoo'

Why?

Thanks,
nyenyec



From steven.bethard at gmail.com  Tue Jan 30 09:13:15 2007
From: steven.bethard at gmail.com (Steven  Bethard)
Date: 30 Jan 2007 06:13:15 -0800
Subject: Fixed length lists from .split()?
In-Reply-To: <2007012611072716807-bob@passcalnmtedu>
References: <2007012611072716807-bob@passcalnmtedu>
Message-ID: <1170166395.766987.125010@l53g2000cwa.googlegroups.com>

On Jan 26, 11:07 am, Bob Greschke <b... at passcal.nmt.edu> wrote:
> I'm reading a file that has lines like
>
>     bcsn; 1000000; 1223
>     bcsn; 1000001; 1456
>     bcsn; 1000003
>     bcsn; 1000010; 4567
>
> The problem is the line with only the one semi-colon.
> Is there a fancy way to get Parts=Line.split(";") to make Parts always
> have three items in it

In Python 2.5 you can use the .partition() method which always returns 
a three item tuple:

>>> text = '''\
...     bcsn; 1000000; 1223
...     bcsn; 1000001; 1456
...     bcsn; 1000003
...     bcsn; 1000010; 4567
... '''
>>> for line in text.splitlines():
...     bcsn, _, rest = line.partition(';')
...     num1, _, num2 = rest.partition(';')
...     print (bcsn, num1, num2)
...
('    bcsn', ' 1000000', ' 1223')
('    bcsn', ' 1000001', ' 1456')
('    bcsn', ' 1000003', '')
('    bcsn', ' 1000010', ' 4567')
>>> help(str.partition)
Help on method_descriptor:

partition(...)
    S.partition(sep) -> (head, sep, tail)

    Searches for the separator sep in S, and returns the part before 
it,
    the separator itself, and the part after it.  If the separator is 
not
    found, returns S and two empty strings.


STeVe



From jordan.taylor2 at gmail.com  Thu Jan 25 13:08:01 2007
From: jordan.taylor2 at gmail.com (Jordan)
Date: 25 Jan 2007 10:08:01 -0800
Subject: asyncore.dispatcher.handle_read
In-Reply-To: <mailman.3158.1169745496.32031.python-list@python.org>
References: <mailman.3158.1169745496.32031.python-list@python.org>
Message-ID: <1169748481.260540.58640@k78g2000cwa.googlegroups.com>

That was not entirely helpful, it's way more likely a mistake you made
in subclassing dispatcher than a problem within asycore itself (that
ended up sounding a lot more mean/angry than intended, sorry ?_? ),
you really need to show us what changes you made to asyncore.dispatcher
if you want help.  Good luck.

Cheers,
Jordan

On Jan 25, 12:18 pm, Indy <ind... at gmail.com> wrote:
> Greetings.
>
> I am writing an asynchronous server, and I use the standard library's
> module asyncore.
> I subclass asyncore.dispatcher. handle_accept works just right, that
> is, when a client socket makes a request to connect to my server
> socket, things that I set in handle_accept definition, happen. So, it
> is OK. But, the problem is that handle_read does not work as expected.
> Things I set in handle_read definition, do not happen when a client
> socket sends me data. Why? Is this a known problem? Please, can you
> help me?
> Thanks a lot, in advance.
>
> Best regards,
> Aristotelis Mikropoulos
>
> --
> Programs must be written for people to read, and only incidentally for
> machines to execute.



From Barry.Carroll at psc.com  Wed Jan 17 13:53:06 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Wed, 17 Jan 2007 10:53:06 -0800
Subject: *POLL* How many sheeple believe in the 911 fairy tale and
	willingto accept an Orwellian doublespeak and enslavement world ?
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A7D@eugsrv400.psc.pscnet.com>

> -----Original Message-----
> From: Robert Hicks [mailto:sigzero at gmail.com]
> Sent: Wednesday, January 17, 2007 10:33 AM
> To: python-list at python.org
> Subject: Re: *POLL* How many sheeple believe in the 911 fairy tale and
> willingto accept an Orwellian doublespeak and enslavement world ?
> 
> Please, none of the real facts points to anything else except what
> actually happened. Two planes hit two towers and they came down.
> 
Ladies and Gentlemen:

PLEASE take this discussion to a more appropriate forum.  There are many

forums where people will be happy to debate this: physics, firefighting,
metallurgy, geopolitics, etc.  This forum is about the Python
programming language.  Let's keep it that way.  

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed




From horpner at yahoo.com  Thu Jan 18 10:55:30 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 18 Jan 2007 15:55:30 GMT
Subject: A note on heapq module
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<45ad0f6c$1@nntp0.pdx.net>
	<1168982702.903306.152940@m58g2000cwm.googlegroups.com>
	<slrneqs6j1.l0.horpner@FIAD06.norwich.edu>
	<1169118077.035345.321580@11g2000cwr.googlegroups.com>
Message-ID: <slrneqv9dk.1hk.horpner@FIAD06.norwich.edu>

On 2007-01-18, bearophileHUGS at lycos.com <bearophileHUGS at lycos.com> wrote:
> Neil Cerutti:
>> One more idea, cribbed from the linked list thread elsewhere:
>> it might be nice if your Heap could optionally use an
>> underlying collections.deque instead of a list. I don't know
>> how excellent Python's deque is, but it's possible a deque
>> would provide a faster heap than a contiguous array. C++'s
>> std::deque is the default implementation of C++'s
>> std::priority_queue for that reason (unless I'm confused
>> again).
>
> If you have some minutes you can do few speed tests and show us
> the code and the timing results...

collections.deque is the loser.

Here's the output of the program from my last run:

list: 5.81679827554
deque: 6.40347742423
C heapq: 2.24028186815

Here's the program. You can customize it somewhat to attempt to
model a real program. It builds up a heap of random integers to
some size, performs random pushes and pops for a while, and then
pops the heap down until it's empty.

import random
import timeit

OPCOUNT = 5000
HEAP_SIZE = 100

# Create a random sequence of pushes and pops.
pushes = 0
ops = []
for i in xrange(OPCOUNT):
    x = random.randint(0, 1)
    if x == 0 or pushes < HEAP_SIZE:
        pushes += 1
        ops.append(0)
    else: 
        pushes -= 1
        ops.append(1)
# Pop off the rest
for i in xrange(pushes):
    ops.append(1)

def test(mod, cont):
    for op in ops:
        if op:
            mod.heappop(cont)
        else:
            mod.heappush(cont, random.randint(0, 150))

# heapqd is the pure Python heapq module without the C implementation.
t1 = timeit.Timer("test(heapqd, list())",
        "from __main__ import test; import heapqd")
t2 = timeit.Timer("test(heapqd, deque())", 
        "from __main__ import test; "\
        "from collections import deque; "\
        "import heapqd")
t3 = timeit.Timer("test(heapq, list())",
        "from __main__ import test; import heapq")
print "list:", t1.timeit(100)
print "deque:", t2.timeit(100)
print "C heapq:", t3.timeit(100)

-- 
Neil Cerutti
The Pastor would appreciate it if the ladies of the congregation would lend
him their electric girdles for the pancake breakfast next Sunday morning.
--Church Bulletin Blooper

-- 
Posted via a free Usenet account from http://www.teranews.com



From arkanes at gmail.com  Wed Jan 24 15:18:34 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 24 Jan 2007 14:18:34 -0600
Subject: Python does not play well with others
In-Reply-To: <XUOth.37107$Gr2.33940@newssvr21.news.prodigy.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<xqxirex3psq.fsf@cola3.ca.boeing.com>
	<suMth.75341$wP1.17392@newssvr14.news.prodigy.net>
	<mailman.3096.1169659857.32031.python-list@python.org>
	<XUOth.37107$Gr2.33940@newssvr21.news.prodigy.net>
Message-ID: <4866bea60701241218s7931e703yd44aecc6ac550058@mail.gmail.com>

On 1/24/07, John Nagle <nagle at animats.com> wrote:
> Chris Mellon wrote:
> > On 1/24/07, John Nagle <nagle at animats.com> wrote:
> >
> >> Harry George wrote:
> >> > John Nagle <nagle at animats.com> writes:
>
> > Just to be clear: The problem here is "my personal itch is not being
> > scratched by other people for me", not "Python doesn't play well with
> > others". You are not any more important than anyone else and assuming
> > that anyone cares about your problems is a major fallacy. You have a
> > specific library that doesn't meet your needs, and that you are not
> > interested in maintaining yourself, so you are attempting to leverage
> > some sort of community guilt trip to get other people to do it for
> > you. That's dishonest and off-putting.
>
>     No, the problem is that these things are broken.
>

That's *your* problem. I don't write any code that uses SSL and so
it's not *my* problem. In a community effort, you either need to fix
your own problems or convince other people that they should fix them.
Saying "hey guys, this is broken" is a start. "You guys are shirking
your responsibilities and not supporting me the way I want to be
supported" is not, because it assumes an entitlement that you do not
have.

>     Python is the only major open source project I've encountered where
> there's so much hostility to bug reports.
>

You've never submitted a duplicate bug to Gnome, have you? Regardless,
I see very little hostility toward bug reports. You confuse people
failing to satisfy your needs with hostility.

>     For a while, I tried submitting long, detailed bug reports showing
> where in the C code a problem lies, and pointing out ways to fix it.
> But I don't want to take over maintenance on the SSL package;
> it's too delicate.

And yet, you are perfectly willing to claim that everyone else who
makes the same decision is failing, somehow. Could one not point out
that you are failing your responsibility to the Python community,
following the same logic?


From jrpfinch at gmail.com  Fri Jan 12 12:18:54 2007
From: jrpfinch at gmail.com (jrpfinch)
Date: 12 Jan 2007 09:18:54 -0800
Subject: Newbie imap lib question
In-Reply-To: <1168611888.009894.271190@51g2000cwl.googlegroups.com>
References: <1168611888.009894.271190@51g2000cwl.googlegroups.com>
Message-ID: <1168622334.397481.186310@38g2000cwa.googlegroups.com>

All I have to go on is the RFC2060 standard which says:

7.3.1.  EXISTS Response

   Contents:   none

      The EXISTS response reports the number of messages in the
mailbox.
      This response occurs as a result of a SELECT or EXAMINE command,
      and if the size of the mailbox changes (e.g. new mail).

      The update from the EXISTS response MUST be recorded by the
      client.

   Example:    S: * 23 EXISTS



From gmenhennitt at optusnet.com.au  Thu Jan 11 17:47:37 2007
From: gmenhennitt at optusnet.com.au (Graham Menhennitt)
Date: Fri, 12 Jan 2007 09:47:37 +1100
Subject: injecting functions into a python sandbox within a python program
In-Reply-To: <45a41cb7$0$308$426a74cc@news.free.fr>
References: <45a4172e$0$71751$c30e37c6@ken-reader.news.telstra.net>
	<45a41cb7$0$308$426a74cc@news.free.fr>
Message-ID: <45a6be85$0$71760$c30e37c6@ken-reader.news.telstra.net>

Bruno Desthuilliers wrote:
 > If all your helper functions are really methods of the Interface
 > instance, you may try this instead (NB : not tested):
 >
 > glob = {
 >   'i': i,
 >   'f1': i.whatever,
 > }
 > exec script in glob

Bruno,

Thanks for replying.

Some of the functions are as simple as that so I can do as you 
described. Some are more complicated so it doesn't work. For now I'll 
stick with the prepending.

Thanks,
	Graham


From theller at ctypes.org  Tue Jan  2 12:06:30 2007
From: theller at ctypes.org (Thomas Heller)
Date: Tue, 02 Jan 2007 18:06:30 +0100
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167757137.942280.32270@42g2000cwt.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>	<4595B214.3070405@v.loewis.de>	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>	<mailman.2205.1167751490.32031.python-list@python.org>
	<1167757137.942280.32270@42g2000cwt.googlegroups.com>
Message-ID: <ene3en$obf$2@sea.gmane.org>

Ben Sizer schrieb:
> Gabriel Genellina wrote:
> 

>> Notice that there is NO need to alter the system path. You just have
>> to tell Windows where python.exe resides; there is a per-application
>> path located at
>> HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths.
>> In order to launch Python just writing "python" at the command
>> prompt, the installer should -instead of playing with the system
>> path- create a new key below App Paths, named "python.exe", and set
>> its default value to the full path of the installed python executable.
>> See
>> http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/programmersguide/shell_basics/shell_basics_extending/fileassociations/fa_perceived_types.asp
> 
>>From what I can tell, that is solely for file associations. If so, it
> will work if you type "setup.py install" but not if you type "python
> setup.py install". For instance, I have an entry for Firefox in that
> part of the registry, but if you try executing "firefox" at the command
> line, it fails.

Not really.  It's for ShellExecute, which is used for the 'run' entry in the
start menu, or when you type 'start firefox' from the command line.

Thomas



From python at rcn.com  Wed Jan 10 21:58:35 2007
From: python at rcn.com (Raymond Hettinger)
Date: 10 Jan 2007 18:58:35 -0800
Subject: Evolving doctests for changing output format
References: <1168313515.965895.86730@s80g2000cwa.googlegroups.com>
Message-ID: <1168484315.722785.101890@k58g2000hse.googlegroups.com>

[nriley at gmail.com]
> What I'd like is if I could get doctest to take my tests, and
> substitute the obtained output for the provided output.

There's currently no support for auto-updating doctests.  I think it
would make for a good feature request.

In the meantime, it may not be difficult to roll your own by converting
the current expected/got output into a diff and then applying it to the
original source code being doctested.

Start with a regular expression like this:

pat = re.compile(r'''
File.+,\sline\s(\d+),.+\n
Failed\sexample:\n((?:.*?\n)*?)
Expected:\n((?:.*?\n)*?)
Got:\n((?:.*?\n)*?)
\*{70,70}
''', (re.MULTILINE | re.VERBOSE))

Then, build-up a diff in your preferred format.  Perhaps like this:

cumadj = 0
for lineno, example, expected, got in pat.findall(source):

    len_example, len_expected, len_got = example.count('\n'),
expected.count('\n') , got.count('\n')
    start = int(lineno) + len_example
    lead = str(start)
    if len_expected !=1:
        lead += ',' + str(start+len_expected-1)
    lead += 'c' + str(start + cumadj)
    if len_got != 1:
        lead += ',' + str(start+cumadj+len_got-1)

    print lead
    for old in expected.splitlines(False):
        print '<' + old
    print '---'
    for new in got.splitlines(False):
        print '>' + new

    cumadj += len_got - len_expected 



Raymond



From bdesth.quelquechose at free.quelquepart.fr  Mon Jan 29 16:12:02 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 29 Jan 2007 22:12:02 +0100
Subject: Python does not play well with others
In-Reply-To: <wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
	<1169726842.719104.304300@v45g2000cwv.googlegroups.com>
	<wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
Message-ID: <45be5c40$0$23047$426a74cc@news.free.fr>

John Nagle a ?crit :

(snip)

>    My main concern is with glue code to major packages.  The connections
> to OpenSSL, MySQL, and Apache (i.e. mod_python) all exist, but have major
> weaknesses.

Neither MySQLdb nor mod_python are part of the Python's standard lib AFAIK.

>  If you're doing web applications,

I do.

> those are standard pieces
> which need to work right. 

I avoid using MySQL - SQLite does a better job as a lighweight 
SQL-compliant no-server solution, and PostgreSQL is years ahead of MySQL 
when it comes to serious, rock-solid transactional RDBMS. But I had no 
problem with the MySQLdb package so far. I also tend to favor 
Apache-independant deployment solutions, so while I had some fun with 
mod_python, I failed to clearly understand how broken it is. And I did 
not have to worry about the ssl support in Python so far. FWIW, I had do 
some LDAP stuff with both PHP and Python, and I would certainly not 
advocate PHP's LDAP support.

> There's a tendency to treat those as abandonware
> and re-implement them as event-driven systems in Twisted.

While Twisted seems an interesting project, it's usually not the first 
mentioned when talking about web development with Python.

>  Yet the
> main packages aren't seriously broken.  It's just that the learning curve
> to make a small fix to any of them is substantial, so nobody new takes
> on the problem.

If you feel you need it, then it's up to you.


From steve at REMOVEME.cybersource.com.au  Wed Jan 31 02:24:22 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 31 Jan 2007 18:24:22 +1100
Subject: parent-child object design question
References: <1170136965.015119.225920@q2g2000cwa.googlegroups.com>
	<mailman.3297.1170139632.32031.python-list@python.org>
	<1170220553.843010.258260@a34g2000cwb.googlegroups.com>
Message-ID: <pan.2007.01.31.07.24.21.793319@REMOVEME.cybersource.com.au>

On Tue, 30 Jan 2007 21:15:53 -0800, manstey wrote:

> Hi Ben,
> 
> Could I also do something like the following? What does it mean to
> store the parent class as a private variable in the child class?

What it means is that references to "self.__data" (note the TWO leading
underscores) in your code below are mangled by Python to be
"self._CacheProperty__data__" instead.

This gives you a weak form of "private" variable, good for annoying people
and yourself, possibly okay to help prevent many accidental name clashes,
but not much else.

On the other hand, references to "self._parent" (note only ONE leading
underscore) is a convention. It is like putting a comment "Private, don't
touch" in your code. It isn't enforced by Python. That's usually a good
thing.


> class CacheProperty(object):
>         def __init__(self, obj, parent, properties=None):
>             self.__data = obj
>             self._parent = parent
>             if properties is None:
>                 properties = {}
>             self._accumulate_properties(properties)
> 
> 
>         def _accumulate_properties(self, properties):
>             self.properties = []

Probably better to put that in the __init__ method, otherwise if somebody
runs instance._accumulate_properties(...) again, it will have the
side-effect of throwing away whatever was already in instance.properties.

Some people might argue that if someone runs a private method like
_accumulate_properties, they deserve whatever bad things happen to them.
But I say, well, sure, but why *design* your method to break things when
called twice? Who knows, maybe you'll decide you want to call it twice
yourself.


>             for key, val in properties.iteritems():
>                 setattr(self, key, val)
>                 self.properties.append(key)

If I am reading this correctly, self.properties is almost the same as
self.__dict__.keys() only missing some values.


>         def __getattr__(self, name):
>             return getattr(self.__data, name)

Okay, let's see how this works.

child = CacheProperty([1,2,3], PARENT, {"food": "eggs", "colour": "green"})

# child.__data is the list [1,2,3]
# child._parent is PARENT (whatever that is)
# child.properties is the list ['food', 'colour']

Now, if I say:

child.__len__()
=> returns 3

child.index(2)
=> returns 1

That's just straight-forward delegation to the "obj" argument stored in
data. But when I say:

child.set('foo')

expecting to have the following method called:

>         def set(self, property):
>             return self._parent.set(property)

oops! It gets delegated to obj instead of the parent.

> the set function allows us to call the parent set function within the
> child, which is what we need to do.

Why not do this?

instance._parent.set('foo')

No mess, no fuss, bug-free, and self-documenting.


-- 
Steven D'Aprano 



From kotamura at hello.email.ne.jp  Sat Jan  6 13:29:41 2007
From: kotamura at hello.email.ne.jp (Koichi)
Date: Sun, 07 Jan 2007 03:29:41 +0900
Subject: A problem in embedding Python in a plug-in
Message-ID: <20070106182941.3B1D3252D6@mail.asahi-net.or.jp>

Hi, I'm now making a plug-in for a CG software. I embed
Python in a plugin and it works. The problem is that it
conflicts with other plugins that also embeds Python because it
runs in the same thread. I don't know when Py_Initialize() and
Py_Finalize() are executed because I don't know when user loads/unloads
a plugin that embeds Python. Is there any right way to embed
Python in a plug-in under the following conditions? If not, what
options do I have to give up any of them?

- My plug-in has no way to know when the user loads/unloads it.
- My plug-in has no way to know when the user loads/unloads somebody
  else's plug-in that embeds Python.
- Somebody else's plug-in might have used any Python/C API including
  GIL related stuff, new_interpreter, PyGILState_*
- Every plug-in initially runs in the same thread but some plug-in
  can start a new thread.
- Preferably my plug-in has its own __main__
- My plug-in doesn't have to be thread safe but shouldn't disturb
  any other plug-in (so should be thread safe anyway)

Typical problem is:
- When somebody else loads or unloads another plugin and calls
  Py_IsInitialized() or Py_Finalize(), my plugin fails
- When some other plugin uses PyGILState*(), both plugin fails
  because my plug-in uses new interpreter
(I'm new to Python/C API so I may be misunderstanding one ore more)

Any suggestion is appreciated.

Koichi




From danielkleinad at gmail.com  Mon Jan  1 18:25:26 2007
From: danielkleinad at gmail.com (Daniel Klein)
Date: Mon, 01 Jan 2007 18:25:26 -0500
Subject: How do I add users using Python scripts on a Linux machine
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
Message-ID: <qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>

On 1 Jan 2007 11:33:42 -0800, "Ramdas" <ramdaz at gmail.com> wrote:

>How do I add users using Python scripts on a Linux machine?
>
>Someone has a script?

This should be as easy as something like:

os.system("/usr/sbin/useradd -m -d /home/newuser -s /bin/ksh")

Dan


From uval at rz.uni-karlsruhe.de  Sun Jan 21 12:18:14 2007
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Sun, 21 Jan 2007 18:18:14 +0100
Subject: pylab, matplotlib ... roots function question
Message-ID: <ep16t2$fa2$1@news2.rz.uni-karlsruhe.de>

Hello NG,

given this call to roots funtion from pylab

In [342]: roots([0,2,2])
Out[342]: array([-1.])

as far as I understand it [a0,a1,a2] stands for a0+a1*x+a2*x^2
in the above case it yields 2x^2+2x = 2x(1+x)
and the roots are 0 and -1
I am wondering why roots function gives me only the -1

second try

In [343]: roots([1,0,0])
Out[343]: array([], dtype=float64)

ok, as it should be

In [344]: roots([0,0,1])
Out[344]: array([], dtype=float64)

here again, 0 is the root of x^2

Do I miss something important?


Regards, Daniel


From chris at kateandchris.net  Tue Jan  2 16:34:14 2007
From: chris at kateandchris.net (Chris Lambacher)
Date: Tue, 2 Jan 2007 16:34:14 -0500
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167757721.883547.70530@42g2000cwt.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
	<mailman.2211.1167756187.32031.python-list@python.org>
	<1167757721.883547.70530@42g2000cwt.googlegroups.com>
Message-ID: <20070102213414.GA17469@kateandchris.net>

On Tue, Jan 02, 2007 at 09:08:41AM -0800, Ben Sizer wrote:
> Chris Lambacher wrote:
> 
> > On Sat, Dec 30, 2006 at 04:55:09PM -0800, Ben Sizer wrote:
> 
> > > Yet many scripts and applications require parameters, or to be executed
> > > from a certain directory. For example, setup.py. Or the various
> > > turbogears scripts. Or easy_install.
> 
> > Martin's point was that if you need to pass arguments, you can call the script
> > from the command line like so:
> > setup.py install
> >
> > The python part of the 'python setup.py install' idiom needs to be omitted on
> > Windows, but that does not mean that the solution is to automatically add it
> > to PATH.
> 
> Firstly, that solution only works for actual Python scripts; it doesn't
> solve the utility scripts that are often installed to the /scripts
> directory. It's a shame that many responses on this thread don't
> address that half of the issue. Am I the only person who installs
> packages that add scripts (not all of which are Python ones)?
Nope, but just adding the scripts directory to the PATH does not solve the
problem.  You also need to either create an executable launcher (.bat  or
.exe) for the script or mess with environment variables to tell Windows to
treat .py files a executable.  This issue is solved in Unix by toggling the
executable bit on the file in the file system.

Easy Install helps the situation by making an executable of the same name as
the script which calls the script.  There has been discussion on the distutils
mailing list about how to put this in the user's path.  No good solution has
been proposed.  If Easy Install were made the default distribution method, or
distutils spawned the ability to handle scripts in a similar manner, I would
be in favour of optionally adding scripts to PATH.  Whether that option is on
by default or not could be debated at that time.

> 
> Secondly, it's still a significant difference from the Unix-based
> installs. 
Its not really.  Unix installs default to being installed to the prefix /usr,
which just happens to put the executable in your path.  It does not modify the
user's path in any way.  If you install to some location that is not in your
path it is your responsibility to add that location to your path or provide an
explicit path.  Some of the problems caused by this are mitigated by the way
Unix identifies executables.
> You're right, the solution doesn't automatically have to be
> adding it to the PATH - but I'm yet to see a good argument for choosing
> not to, apart from "I don't like it when apps do that".
> 
> > The documentation is misleading... time for a but report:
> > http://sourceforge.net/tracker/index.php?func=detail&aid=1626300&group_id=5470&atid=105470
> 
> Fixing the docs is better than nothing, but I believe fixing the
> install to encourage uniform usage across all platforms is preferable,
> and that in this regard the documentation shows how it 'should' work.
> 
> > > There appears to be a freely-available binary at this address that may
> > > suffice:
> > > http://legroom.net/modules.php?op=modload&name=Open_Source&file=index&page=software&app=modpath
> 
> > Unfortunately the Python installer is not an InnoSetup installer.
> 
> The page I linked to is a bit misleading but there is an executable on
> that page. All you then have to do is invoke it with the relevant
> parameter.
Sorry, I saw the Inno version and the AutoIt and did not see the compiled
executable version.  I still think it will be more likely to be accepted if
the code was translated into Python, since shipping another executable will
not be required.
> 
> -- 
> Ben Sizer
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list


From juanefren at gmail.com  Sat Jan 27 02:14:20 2007
From: juanefren at gmail.com (juanefren at gmail.com)
Date: Sat, 27 Jan 2007 00:14:20 -0700
Subject: Convert String to list of chars
Message-ID: <e11d28130701262314p34a00302ia0c016379b633435@mail.gmail.com>

How can I convert a string to a char list?
for example

"hello" --> ['h','e','l','l','o']

I have been searching but I can't find my answers

thanks

-- 
Juan Efr?n Castillo Encinas


From __peter__ at web.de  Wed Jan 31 08:47:23 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 31 Jan 2007 14:47:23 +0100
Subject: Regex with ASCII and non-ASCII chars
References: <1170243969.504255.134100@v33g2000cwv.googlegroups.com>
Message-ID: <epq6k8$po8$01$1@news.t-online.com>

TOXiC wrote:

> How I can do a regex match in a string with ascii and non ascii chars
> for example:
> 
>     regex = re.compile(r"(???????ty)", re.IGNORECASE)
>     match = regex.search("???????ty")
>     if match:
>         result = match.group()
>         print result
>     else:
>         result = "No match found"
>         print result
> 
> it return "no match found" even if the two string are equal.

For equal strings you should get a match:

>>> re.compile("Z???", re.IGNORECASE).search("yadda z??? yadda")
<_sre.SRE_Match object at 0x401e0a68>
>>> print _.group()
z???

For case ignorance your best bet is unicode:

>>> re.compile(u"???", re.IGNORECASE|re.UNICODE).search(u"???")
<_sre.SRE_Match object at 0x401e09f8>

Peter



From S.Mientki-nospam at mailbox.kun.nl  Wed Jan  3 09:37:25 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Wed, 03 Jan 2007 15:37:25 +0100
Subject: function without brackets ?
Message-ID: <57668$459bbf95$d443bb3a$16218@news.speedlinq.nl>

If I call a parameterless function without brackets at the end,
the function is not performed, but ...
I don't get an error message ???

Is this normal  behavior ?

thanks,
Stef Mientki


From could.net at gmail.com  Wed Jan 17 11:28:14 2007
From: could.net at gmail.com (Frank Potter)
Date: 17 Jan 2007 08:28:14 -0800
Subject: how to write unicode to a txt file?
Message-ID: <1169051293.848769.163860@s34g2000cwa.googlegroups.com>

I want to change an srt file to unicode format so mpalyer can display
Chinese subtitles properly.
I did it like this:

txt=open('dmd-guardian-cd1.srt').read()
txt=unicode(txt,'gb18030')
open('dmd-guardian-cd1.srt','w').write(txt)

But it seems that python can't directly write unicode to a file,
I got and error at the 3rd line:
UnicodeEncodeError: 'ascii' codec can't encode characters in position
85-96: ordinal not in range(128)

How to save the unicode string to the file, please?
Thanks!



From donn at u.washington.edu  Thu Jan 18 15:02:11 2007
From: donn at u.washington.edu (Donn Cave)
Date: Thu, 18 Jan 2007 12:02:11 -0800
Subject: How to find out if another process is using a file
References: <eoo6vd$33u$1@gemini.csx.cam.ac.uk>
	<mailman.2878.1169141728.32031.python-list@python.org>
Message-ID: <donn-66A101.12021118012007@gnus01.u.washington.edu>

In article <mailman.2878.1169141728.32031.python-list at python.org>,
 "Gabriel Genellina" <gagsl-py at yahoo.com.ar> wrote:

> "Tom Wright" <tew24 at spam.ac.uk> escribi? en el mensaje 
> news:eoo6vd$33u$1 at gemini.csx.cam.ac.uk...
> 
> > I'm writing a program which reads a series of data files as they are 
> > dumped
> > into a directory by another process.  At the moment, it gets sporadic bugs
> > when it tries to read files which are only partially written.
> >
> > I'm looking for a function which will tell me if a file is opened in
> > write-mode by another process - if it is, my program will ignore it for 
> > now
> > and come back to it later.  This needs to work on linux and windows.  Mac
> > OS would be a bonus too.  An os-independent solution would be good, but I
> > could write os-specific options and have it pick the appropriate one.
> 
> Use os.open with the O_EXCL flag; will fail if the other process has the 
> file still open (and will fail if another process is reading the file, too, 
> not just if someone is writing).

O_EXCL fails if the file exists at all - whether closed or open.

   Donn Cave, donn at u.washington.edu


From pavlovevidence at gmail.com  Sat Jan 27 09:19:59 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 27 Jan 2007 06:19:59 -0800
Subject: assertions to validate function parameters
In-Reply-To: <pan.2007.01.26.04.26.09.242968@REMOVE.THIS.cybersource.com.au>
References: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
	<pan.2007.01.26.04.26.09.242968@REMOVE.THIS.cybersource.com.au>
Message-ID: <1169907599.090680.286910@a75g2000cwd.googlegroups.com>



On Jan 25, 11:26 pm, Steven D'Aprano 
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> Note also that for real code, a bare assert like that is uselessly
> uninformative:
>
> >>> x = 1
> >>> assert x == 3Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AssertionError

In real code, a traceback usually prints the line of code containing 
the failed assertion.


> This is better:
>
> >>> assert x == 3, "x must be equal to three but is %s instead" % xTraceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AssertionError: x must be equal to three but is 1 instead
>
> This is even better still:
>
> >>> if x != 3:...     raise ValueError("x must be equal to three but is %s instead" % x)
> ...
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ValueError: x must be equal to three but is 1 instead

These are are verbose to the point of silliness, and usually not worth 
the effort since assertions are only supposed to check for ostensibly 
impossible conditions.  Thus it shouldn't pop up often enough to 
justify writing a verbose error message in advance, and when it does 
trigger you're going to have to print the failed result in a debuging 
run anyways.


Carl Banks



From gagsl-py at yahoo.com.ar  Mon Jan 22 20:15:00 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 22 Jan 2007 22:15:00 -0300
Subject: How to get self reference from within a module?
In-Reply-To: <3ca9bbe50701221526p4bb7cffdx767d6737bed0a6a2@mail.gmail.co
 m>
References: <3ca9bbe50701221526p4bb7cffdx767d6737bed0a6a2@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070122221123.03fb7e40@yahoo.com.ar>

At Monday 22/1/2007 20:26, Lavoie ?rick wrote:

>  i would like to now how to get a self 
> reference from within a module.  The goal is to 
> be able to generate a list of all declared function within the module.

 From inside the module, use globals() - that 
includes all defined symbols (classes, imported 
modules, functions, etc). You can filter them 
using inspect.isfunction by example.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From cvanarsdall at mvista.com  Wed Jan 31 16:52:35 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 31 Jan 2007 13:52:35 -0800
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <20070131203758.25807.1007628884.divmod.quotient.4971@ohm>
References: <20070131203758.25807.1007628884.divmod.quotient.4971@ohm>
Message-ID: <45C10FA3.7030208@mvista.com>

Jean-Paul Calderone wrote:
> On 31 Jan 2007 12:24:21 -0800, Carl Banks <pavlovevidence at gmail.com> wrote:
>   
>> Michele Simionato wrote:
>>     
>>> On Jan 31, 5:23 pm, "Frank Potter" <could.... at gmail.com> wrote:
>>>       
>>>> I want to find a multithreaded downloading lib in python,
>>>> can someone recommend one for me, please?
>>>> Thanks~
>>>>         
>>> Why do you want to use threads for that? Twisted is the
>>> obvious solution for your problem,
>>>       
>> Overkill?  Just to download a few web pages?  You've got to be
>> kidding.
>>     
>
> Better "overkill" (whatever that is) than wasting time re-implementing
> the same boring thing over and over for no reason.
>   

How is that a waste of time?  I wrote the script to do it in 10 lines.  
What is a waste of time is learning a whole new technology/framework to 
do a simple task that can be scripted in 4 minutes.

-c

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From codecraig at gmail.com  Tue Jan 16 10:22:30 2007
From: codecraig at gmail.com (abcd)
Date: 16 Jan 2007 07:22:30 -0800
Subject: Search Queue
Message-ID: <1168960945.787822.286690@s34g2000cwa.googlegroups.com>

I have a class such as...

id = 0
class Foo:
    def __init__(self, data):
        self.id = id
        id += 1
        self.data = data

And I am storing them in a Queue.Queue...

import Queue
q = Queue.Queue()
q.put(Foo('blah'))
q.put(Foo('hello world'))
q.put(Foo('test'))

how can I search "q" for an instance of Foo which has 'id' equal to say
2?  Typically a queue only lets you put and get, not really search.

Thanks.



From martin at v.loewis.de  Fri Jan  5 19:30:03 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 06 Jan 2007 01:30:03 +0100
Subject: PyType_IsSubtype ()
In-Reply-To: <1167996955.467665.286170@42g2000cwt.googlegroups.com>
References: <1167986947.735415.99970@s34g2000cwa.googlegroups.com>
	<459E1988.8060807@v.loewis.de>
	<1167996955.467665.286170@42g2000cwt.googlegroups.com>
Message-ID: <459eed8b$0$25915$9b622d9e@news.freenet.de>

Sheldon schrieb:
> I ran the program in GDB and it crashed giving the following backtrace:
> 
> #0  0x4008376e in PyType_IsSubtype () from /usr/lib/libpython2.3.so.1.0
> #1  0x4047730c in ?? () from
> /usr/lib/python2.3/site-packages/Numeric/_numpy.so
> 
> Can you make head or tail of this?

Not yet, although it hints to a bug in Numeric.

It now would help if _numpy.so was compiled with debug information enabled.

Regards,
Martin


From beej at beej.us  Mon Jan 29 13:30:16 2007
From: beej at beej.us (Beej)
Date: 29 Jan 2007 10:30:16 -0800
Subject: Data structure and algorithms
In-Reply-To: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
References: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
Message-ID: <1170095416.261460.157660@a34g2000cwb.googlegroups.com>

On Jan 28, 2:56 pm, "azrael" <jura.gro... at gmail.com> wrote:
> class Node:
>   def __init__(self, cargo=None, next=None):
>     self.cargo = cargo
>     self.next  = next

This is OK for the node itself, but maybe you should try writing a 
LinkedList class that you use:

class LinkedList(object):
    def __init__(self):
        self.head = None

    def append(self, node):
        ...

    def remove(self, node):
        ...

>>> ll = LinkedList()
>>> ll.append(Node(3490))

(For extra fun, make it so you can iterate over the linked list and 
call it like this:    for n in ll: print n   :-) )

> >>> list=[]
> >>> list.append(Node(1))
> >>> list.append(Node(2))
> >>> list[0].next=list[1]
> >>> list.append(Node(3))
> >>> list[1].next=list[2]

I'd classify this as "not pretty".  Sure, it's more "dynamic" in that 
you don't have a variable to reference every node, but it's way 
cleaner to make an encapsulating LinkedList class, right?

In in Python, references to objects are very much like pointers in C:

>>> foo = Node(3490)  # foo is a reference to a Node instance
>>> bar = foo   # bar points to the same Node instance as foo
>>> foo
<__main__.Node object at 0xb7b362ec>
>>> bar
<__main__.Node object at 0xb7b362ec>

See?  They point to the name Node object.

> I think that my concept is wrong by using a list to create a list.

I agree with you, if your goal is to implement your own list.  Using 
the Python functionality just makes things less clear.

> Is
> it possible to manage the insertation of new object like in C by
> allocating new memory space.

Absolutely.  The "next" pointer thing is the way to go, so you're on 
the right track with that.

When deleting nodes from the list, you don't explicitly delete them; 
you just need to remove all your references to them.  Nodes will be 
garbage collected when there are no more references to them anywhere.

> any sugestions how to make the implementation more like in C. I never
> managed the syntax of C so I stoped when structs crossed my way.
> Please help. I dont want to learn C.

Ah, it's a pity.  C is my favorite compiled procedural language.

-Beej



From google at spiceaid.com  Fri Jan 12 09:27:53 2007
From: google at spiceaid.com (Dr. Who)
Date: 12 Jan 2007 06:27:53 -0800
Subject: What about this?
In-Reply-To: <50n9kcF1g30l4U2@mid.individual.net>
References: <1168525050.536736.74590@i39g2000hsf.googlegroups.com>
	<50n9kcF1g30l4U2@mid.individual.net>
Message-ID: <1168612073.635206.84620@s34g2000cwa.googlegroups.com>

What's more amazing is that anyone would click on the link at all given
the increasing number of website that provide hidden content that tries
to deliver spyware or viruses just by getting visitors.

Jeff

Bjoern Schliessmann wrote:
> new wrote:
>
> > www.magicoz.com
> > amazing
>
> Yeah, it *is* really amazing that someone dares to spam for such an
> unprofessional homepage. Even too stupid to include a doctype ...
> 
> 
> Bj?rn
> 
> -- 
> BOFH excuse #61:
> 
> not approved by the FCC



From gagsl-py at yahoo.com.ar  Wed Jan 31 22:17:02 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 Feb 2007 00:17:02 -0300
Subject: win32com.client
References: <1170278964.738118.219600@k78g2000cwa.googlegroups.com>
	<mailman.3371.1170279963.32031.python-list@python.org>
	<1170292629.986774.88240@a34g2000cwb.googlegroups.com>
Message-ID: <op.tm1veoomsd1mbx@gabriel2.softlabbsas.com.ar>

En Wed, 31 Jan 2007 22:17:10 -0300, vithi <vithi99 at hotmail.com> escribi?:

> This is not I was looking for. There is a module call
> "win32com.client" in python some people used it If any body know about
> it let me know.
>
> On Jan 31, 1:45 pm, Gary Herron <gher... at islandtraining.com> wrote:
>> vithi wrote:
>> > Hi
>> > Any one tell me where I can get (or download) python modules win32com
>> > or win32com.client because I have to use "Dispatch"  thanks
>>
>> You want the "python for windows" extension, available from
>>  http://sourceforge.net/projects/pywin32/

Yes. You get the win32com module from the above url. It's part of that  
package, by Mark Hammond, and a lot of people uses it.

-- 
Gabriel Genellina



From sturlamolden at yahoo.no  Sat Jan 13 17:47:53 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 13 Jan 2007 14:47:53 -0800
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
In-Reply-To: <1168715634.695961.14710@l53g2000cwa.googlegroups.com>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
	<eo78ah$dqc$1@sea.gmane.org>
	<mailman.2633.1168583356.32031.python-list@python.org>
	<1168715634.695961.14710@l53g2000cwa.googlegroups.com>
Message-ID: <1168728465.178605.218850@q2g2000cwa.googlegroups.com>


oyekomova wrote:
> Thanks to everyone for their excellent suggestions. I was able to
> acheive the following results with all your suggestions. However, I am
> unable to cross file size of 6 million rows. I would appreciate any
> helpful suggestions on avoiding memory errors. None of the solutions
> posted was able to cross this limit.

The error message means you are running out of RAM.

With 6 million rows and 6 columns, the size of the data array is (only)
274 MiB. I have no problem allocating it on my laptop. How large is the
csv file and how much RAM do you have?

Also it helps to post the whole code you are trying to run. I don't
care much for guesswork.



From silovana.vjeverica at com.gmail  Mon Jan 22 15:48:22 2007
From: silovana.vjeverica at com.gmail (Boris Ozegovic)
Date: Mon, 22 Jan 2007 21:48:22 +0100
Subject: Best way to document Python code...
References: <1169492869.101706.253620@38g2000cwa.googlegroups.com>
	<tj9th.13185$pQ3.6593@newsread4.news.pas.earthlink.net>
Message-ID: <ep37ov$vvf$1@sunce.iskon.hr>

Adonis Vargas wrote:

> Then Python will generate a quick help interface for your module. I 

Hi

Does Python has API just like in Java, for example
http://java.sun.com/j2se/1.5.0/docs/api/allclasses-noframe.html ctrl-f and
than click on class you are searching for, and finally you get clean list
of all fields and methods.  Where can I find similar in Python, for
example, if I would like to see which methods list/dictionary has.

-- 
"kad ima? 7 godina glup si ko kurac, sve je predobro: auti?i i bageri u
kvartu.. to je ?ivot"
	Drito Konj


From rw at smsnet.pl  Wed Jan 10 15:51:13 2007
From: rw at smsnet.pl (Rob Wolfe)
Date: Wed, 10 Jan 2007 21:51:13 +0100
Subject: Question about compiling.
References: <Pine.LNX.4.64.0701091253500.25764@saturn.syslang.net>
	<mailman.2520.1168421522.32031.python-list@python.org>
Message-ID: <87ac0qy5a6.fsf@smsnet.pl>

Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:

> At Tuesday 9/1/2007 14:56, Steven W. Orr wrote:
>
>>I *just* read the tutorial so please be gentle. I created a file called
>>fib.py which works very nicely thank you. When I run it it does what it's
>>supposed to do but I do not get a resulting .pyc file. The tutorial says I
>>shouldn't do anything special to create it. I have machines that have both
>>2.4.1 and 2.3.5. Does anyone have an idea what to do?
>
> Welcome to Python!
> When you run a script directly, no .pyc file is generated. Only when a
> module is imported (See section 6.1.2 on the tutorial). And don't
> worry about it...

That's not the whole truth. :)
If you want to compile your script, you can do that, of course:

$ ls fib*
fib.py
$ python2.4 -mpy_compile fib.py
$ ls fib*
fib.py  fib.pyc

-- 
HTH,
Rob


From pierre.imbaud at laposte.net  Tue Jan 30 16:46:42 2007
From: pierre.imbaud at laposte.net (Imbaud Pierre)
Date: Tue, 30 Jan 2007 22:46:42 +0100
Subject: data design
In-Reply-To: <1170183985.871094.155720@q2g2000cwa.googlegroups.com>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
	<1170183985.871094.155720@q2g2000cwa.googlegroups.com>
Message-ID: <45bfbcc3$0$30950$426a74cc@news.free.fr>

Paddy a ?crit :
> 
> On Jan 30, 2:34 pm, Imbaud Pierre <pierre.imb... at laposte.net> wrote:
> 
>>The applications I write are made of, lets say, algorithms and data.
>>I mean constant data, dicts, tables, etc: to keep algorithms simple,
>>describe what is peculiar, data dependent, as data rather than "case
>>statements". These could be called configuration data.
>>
>>The lazy way to do this: have modules that initialize bunches of
>>objects, attributes holding the data: the object is somehow the row of
>>the "table", attribute names being the column. This is the way I
>>proceeded up to now.
>>Data input this way are almost "configuration data", with 2 big
>>drawbacks:
>>  - Only a python programmer can fix the file: this cant be called a
>>    configuration file.
>>  - Even for the author, these data aint easy to maintain.
>>
>>I feel pretty much ready to change this:
>>- make these data true text data, easier to read and fix.
>>- write the module that will make python objects out of these data:
>>the extra cost should yield ease of use.
>>
>>2 questions arise:
>>- which kind of text data?
>>     - csv: ok for simple attributes, not easy for lists or complex
>>     data.
>>     - xml: the form wont be easier to read than python code,
>>       but an xml editor could be used, and a formal description
>>       of what is expected can be used.
>>- how can I make the data-to-object transformation both easy, and able
>>   to spot errors in text data?
>>
>>Last, but not least: is there a python lib implementing at least part
>>of this dream?
> 
> Google for YAML and JSON formats too.
> http://www.yaml.org/
> http://www.json.org/
> 
> -Paddy
> 
Hurray for yaml! A perfect fit for my need! And a swell tool!
Thanks a lot!



From gagsl-py at yahoo.com.ar  Fri Jan  5 08:28:40 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 05 Jan 2007 10:28:40 -0300
Subject: Calculating Download Rate
In-Reply-To: <1167998032.425050.264280@i15g2000cwa.googlegroups.com>
References: <1167998032.425050.264280@i15g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070105102740.05c92b90@yahoo.com.ar>

At Friday 5/1/2007 08:53, placid wrote:

>I want be able to work the download rate for downloading HTML pages
>using the urllib.urlopen(url). The way i thought i would do this is
>start a timer (or log the current time) just before calling this
>function and the stopping the timer (logging the current time again and
>the working out the difference) this would give me duration that it
>took to retrieve the web-page, not the download rate?

Then, the download rate in bytes/sec would be (size of page in 
bytes)/(time elapsed in seconds)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From timr at probo.com  Wed Jan  3 02:58:04 2007
From: timr at probo.com (Tim Roberts)
Date: Wed, 03 Jan 2007 07:58:04 GMT
Subject: How do I add users using Python scripts on a Linux machine
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
Message-ID: <pcomp21ttk2hg71ftf96dbi17d6d96re12@4ax.com>

"Ramdas" <ramdaz at gmail.com> wrote:
>
>I need to add users from a web interface for a web server, which runs
>only Python. I need to add users, set quotas and in future even look at
>managing ip tables to limit bandwidth.
>
>I know os.system(), but this has to be done through a form entry
>through a web interface.
>
>Anyways thanks, do advise if there more pythonic solutions

os.system is perfectly Pythonic, and can be executed from a CGI script. The
challenge is becoming root, which is necessary to do what you ask.  You can
write a simple C program that is setuid root that calls your script for
you.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From ptmcg at austin.rr.com  Thu Jan 25 03:04:58 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 25 Jan 2007 00:04:58 -0800
Subject: Fast Imaging for Webserver
In-Reply-To: <1169707586.701908.32860@v45g2000cwv.googlegroups.com>
References: <1169707586.701908.32860@v45g2000cwv.googlegroups.com>
Message-ID: <1169712298.439101.171730@l53g2000cwa.googlegroups.com>

On Jan 25, 12:46 am, "Prateek" <sure... at gmail.com> wrote:

> Concurrency Level:      1
> Time taken for tests:   18.664 seconds
> Complete requests:      1000
> Failed requests:        0
> Broken pipe errors:     0
> Total transferred:      14680000 bytes
> HTML transferred:       14417000 bytes
> Requests per second:    53.58 [#/sec] (mean)
> Time per request:       18.66 [ms] (mean)
> Time per request:       18.66 [ms] (mean, across all concurrent
> requests)
> Transfer rate:          786.54 [Kbytes/sec] received
>
> FYI: This request returns a PNG image (image/png) and not html
>
> My understanding is that the problem is either with the CherryPy setup
> (which is likely because even in other cases, i don't get much more
> than 65 requests per second) or PIL itself (even though I'm caching the
> background images and source images)
>
> Does anyone have a better solution? Is there a faster replacement for
> PIL?
>
So you have some gross level statistics on how long a request takes to
process, that's good.  But before you start replacing PIL, or
optimizing CherryPy, or other possible performance-improving efforts,
you should profile the within-request processing, find the bottleneck,
and take care of that first.  Without profiling info, you can easily
spend days optimizing out 90% of a task that takes 2% of the total
processing time, for little net gain.

-- Paul



From fred at adventistcare.org  Wed Jan 31 13:42:36 2007
From: fred at adventistcare.org (Sells, Fred)
Date: Wed, 31 Jan 2007 13:42:36 -0500
Subject: Python tools to manipulate JARs ?
Message-ID: <1A4BF05172023E468CB6E867923BC90404B0CF6A@accmail2.sunbelt.org>

I have not tried this, but...
Assuming jython is out of the question????
You might want to try a simple java command line program you could run from
popen

-----Original Message-----
From: python-list-bounces+frsells=adventistcare.org at python.org
[mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
Behalf Of Andy Dingley
Sent: Wednesday, January 31, 2007 11:11 AM
To: python-list at python.org
Subject: Python tools to manipulate JARs ?


I run build processes for a Java shop using Python (and some Ant).

Would anyone care to suggest favoured tools for manipulating the
innards of JARs? Or do I just treat them as plain zipfiles and get
stuck right in there?

Mainly I'm trying to query lists of classes and their embedded
versions and do some library dependency reporting. Performance speed
is starting to be an issue, as there's 1500+ classes in this bucket
and it's an interactive query.

Thanks for any suggestions

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


From no-spam at no-spam-no-spam.invalid  Mon Jan  1 07:40:03 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Mon, 01 Jan 2007 13:40:03 +0100
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167526509.471697.320750@v33g2000cwv.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
Message-ID: <enavfb$1gn$1@news.albasani.net>

Ben Sizer wrote:
> Martin v. L?wis wrote:
> 
>> 2. Many windows users (including myself) dislike setup routines that
>>    manipulate PATH.
> 
> My opinion is that this is not as big a problem as some may feel that
> it is. Unlike Unix systems, the PATH variable is rarely used. Most

It is a big problem. 

It is not less than the majority of Python users (at least those who do things on the command line) who deal with multiple Python versions.
This would create funny PATH variables - almost a "psychic behavior with history".

I'd vote heavily against manipulating the PATH. 

Example: Just recently I had a lot of magical version problems with Borland stuff installers which by default and without question or noticeable checkboxes add naively (and multiple folders) to the PATH. And there were not just version mix-up problems - even things with same names of the C++ and the Pascal compilers and even stuff from old 16bit compilers wanted to deal with each other... 

"Default Links" - generally speaking - are by far better than PATHs regarding application level stuff.


>> if Python is to be found in PATH, it
>>    should rather be installed to a directory that is known to live
>>    on PATH (or where CreateProcess searches, anyway, such
>>    as system32). So if the installer had such a feature, it should
>>    be optional, and it should default to "off".
> 
> It's a lot more anti-social to install to system32 than to modify the
> PATH variable. How easy is it to temporarily undo an installation to a
> system directory like that? What if you still want Python in your path
> but with less precedence than some other user directory?

Uninstallation would be same as for the pythonXX.dll. 

A python(XX).exe next to the DLL would just be a natural consequence - the DLL already defined the policy. python.exe is nothing else than a DLL loader.

Windows is at all less a multi user system. I don't even know a case where two (Python) Programmers use _one_ box and then also want separate Python's - just know home mates (parasites) who occasionally share the web browser or so...

If one really wants multi user separate installations that clean, it is all necessary to create oneself something like ....\<user>\bin <user>\system32. Yet not different from Linux: a ~\bin on the PATH would be custom with most *unix default layouts also. 
Dealing with less and more precedence / PATH order is about the same issue : you have by far crossed the line from where you have to set yourself the PATH consciously. 
And multiple Python installers automatically establishing the right precedence on the PATH !? - with re.sub() :-) 

Putting a pythonXX.exe next to pythonXX.dll into system32 should be a non-q and a kind of default comfort for multi-python users.
Linking also a default python.exe into the system32 upon a (non-default) checkbox mark in the installer should be simple, clear and do everything what 99.9% want - and most "compatible" to *nix.


Robert


From bj_666 at gmx.net  Thu Jan 18 11:47:25 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 18 Jan 2007 17:47:25 +0100
Subject: How to read and write huge binary files
References: <1169136850.518228.103360@l53g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.18.16.47.24.574884@gmx.net>

In <1169136850.518228.103360 at l53g2000cwa.googlegroups.com>, Lad wrote:

> What is a good  way to read binary data from HUGE  file and write  it
> to another file?

What about `shutil.copy()`?

Ciao,
	Marc 'BlackJack' Rintsch


From bearophileHUGS at lycos.com  Thu Jan 18 18:26:03 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 18 Jan 2007 15:26:03 -0800
Subject: Iterator length
Message-ID: <1169162762.997894.180320@q2g2000cwa.googlegroups.com>

Often I need to tell the len of an iterator, this is a stupid example:

>>> l = (i for i in xrange(100) if i&1)

len isn't able to tell it:

>>> len(l)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: object of type 'generator' has no len()

This is a bad solution, it may need too much memory, etc:

>>> len(list(l))

This is a simple solution in a modern Python:

>>> sum(1 for _ in l)
50

This is a faster solution (and Psyco helps even more):

def leniter(iterator):
    """leniter(iterator): return the length of an iterator,
    consuming it."""
    if hasattr(iterator, "__len__"):
        return len(iterator)
    nelements = 0
    for _ in iterator:
        nelements += 1
    return nelements

Is it a good idea to extend the functionalities of the built-in len
function to cover such situation too?

Bye,
bearophile



From elrondrules at gmail.com  Thu Jan 18 18:46:47 2007
From: elrondrules at gmail.com (elrondrules at gmail.com)
Date: 18 Jan 2007 15:46:47 -0800
Subject: Match 2 words in a line of file
Message-ID: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>

Hi

Am pretty new to python and hence this question..

I have file with an output of a process. I need to search this file one
line at a time and my pattern is that I am looking for the lines that
has the word 'event' and the word 'new'.

Note that i need lines that has both the words only and not either one
of them..

how do i write a regexp for this.. or better yet shd i even be using
regexp or is there a better way to do this....

thanks



From dfj225 at gmail.com  Thu Jan 11 13:43:15 2007
From: dfj225 at gmail.com (dfj225 at gmail.com)
Date: 11 Jan 2007 10:43:15 -0800
Subject: dynamic library loading, missing symbols
In-Reply-To: <mailman.2565.1168504812.32031.python-list@python.org>
References: <mailman.2565.1168504812.32031.python-list@python.org>
Message-ID: <1168540994.907072.114540@p59g2000hsd.googlegroups.com>

On Jan 11, 3:40 am, "Ames Andreas" <Andreas.A... at comergo.com> wrote:

> Have you already checked the output of LD_DEBUG=all or sth. like that?

Yes, that is how I initially knew that my libraries were not even being
processed when the linker tried to bind the symbol.


On Jan 10, 5:01 pm, "Martin v. L?wis" <mar... at v.loewis.de> wrote:

> > I suppose this means that any subsequent libraries dlopened will not
> > see any of the symbols in my module?

> That's correct, and intentional. Python has crashed in the past when
> symbols conflicted across shared libraries.

> > I guess I'll have to look through the Python documentation to see if
> > they offer any work arounds to this problem.

> There is sys.setdlopenflags, but I would use it with caution.

Ok, thank you for pointing out sys.setdlopenflags. This allowed me to
set the RTLD_GLOBAL flag and the linker to bind the symbol to my
library's code. I realize that doing this is more or less a hack, but
at least it will allow me to test my code until a better solution is
created.

Thank you both Martin and Andreas for taking the time to reply to my
post.

~Doug



From piet at cs.uu.nl  Wed Jan 10 17:21:07 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Wed, 10 Jan 2007 23:21:07 +0100
Subject: Problem installing cElementTree on Python 2.5
Message-ID: <m2odp6a5gs.fsf@ordesa.lan>

I have just installed Python 2.5 on Mac OS X 10.4.8 on an iBook (PPC) from
the dmg. Now I tried to install cElementTree -1.0.5-20 from source (no egg
available in cheeseshop) and got the following compilation error:

gcc -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk
-fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd
-fno-common -dynamic -DNDEBUG -g -O3 -DXML_STATIC -DHAVE_MEMMOVE=1
-DXML_NS=1 -DXML_DTD=1 -DBYTEORDER=4321 -DXML_CONTEXT_BYTES=1024 -Iexpat
-I/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5 -c
cElementTree.c -o build/temp.macosx-10.3-fat-2.5/cElementTree.o 
gcc: cannot specify -o with -c or -S and multiple compilations
error: command 'gcc' failed with exit status 1

Does anybody know how to solve this? As I don't need the universal binary I
tried to strip the -arch i386 from the command above but that didn't help.
I also removed the -c, but then the install failed in the next step.

Has anybody succesfully installed cElementTree on this combination?
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From gagsl-py at yahoo.com.ar  Tue Jan 16 20:29:47 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 16 Jan 2007 22:29:47 -0300
Subject: Check a windows service
In-Reply-To: <1168985943.060145.54490@a75g2000cwd.googlegroups.com>
References: <1168966952.965088.17740@l53g2000cwa.googlegroups.com>
	<1168967374.568967.173690@11g2000cwr.googlegroups.com>
	<mailman.2785.1168968712.32031.python-list@python.org>
	<1168985943.060145.54490@a75g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20070116221330.042ff630@yahoo.com.ar>

At Tuesday 16/1/2007 19:19, awel wrote:

>Sorry, but could you give me an example with a real service 'cause I've
>tried this script but nothings happened, no error, nothings ; even if I
>launch it in cmd prompt.

You have to call the EnumServices function if you want some useful output.
Copy&paste the code in a new file, add these 2 lines at the end, and 
save the file with a .py extension:

if __name__=='__main__':
     EnumServices()

Then execute it with: python your_file_name.py
See 
http://diveintopython.org/getting_to_know_python/testing_modules.html 
to understand what's that; and read the whole book, it's a good 
tutorial if you already know another language.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From steve at REMOVEME.cybersource.com.au  Wed Jan 31 20:45:28 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 01 Feb 2007 12:45:28 +1100
Subject: how to "free" an object/var ?
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
	<epolgl$8i4$1@zinnia.noc.ucla.edu>
	<pan.2007.01.31.06.52.12.82782@REMOVEME.cybersource.com.au>
	<1170228172.691120.200280@a75g2000cwd.googlegroups.com>
	<pan.2007.01.31.07.34.24.221453@REMOVEME.cybersource.com.au>
	<1170264406.588032.116550@s48g2000cws.googlegroups.com>
Message-ID: <pan.2007.02.01.01.45.27.594090@REMOVEME.cybersource.com.au>

On Wed, 31 Jan 2007 09:26:46 -0800, Paddy wrote:

> On Jan 31, 7:34 am, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
> wrote:

[snip]

>> --
>> Steven D'Aprano
> 
> Thanks Stephen for explaining my answer a bit more.

Ste_ph_en???

I know the ph-form of the name is marginally more popular, but dammit my
name is right there just two lines above where Paddy started typing, how
hard is it to get it right?

It's not like I spell my name with four M's and a silent Q like the famous
author Farles Wickens *wink*


-- 
Steven D'Aprano 
who thinks there can never be too many Monty Python references 



From S.Mientki-nospam at mailbox.kun.nl  Fri Jan 12 17:21:27 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Fri, 12 Jan 2007 23:21:27 +0100
Subject: Portable Python - free portable development environment !
In-Reply-To: <1168639781.763133.319580@s34g2000cwa.googlegroups.com>
References: <1168533423.224355.221390@k58g2000hse.googlegroups.com>
	<mailman.2598.1168551029.32031.python-list@python.org>
	<1168639781.763133.319580@s34g2000cwa.googlegroups.com>
Message-ID: <e7a16$45a809d2$d443bb3a$19591@news.speedlinq.nl>

perica.zivkovic at gmail.com wrote:
> Right now there is not a big difference with Movable Python.
> - Smaller size but less libraries in default package
> - Portable Python comes with django
> - Uses SciTE not SPE
> 
> but this is first release and I have big plans ;)
> 
any plans for a something like the Enthought-edition ?

cheers,
Stef Mientki


From bborcic at gmail.com  Thu Jan 25 13:22:09 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Thu, 25 Jan 2007 19:22:09 +0100
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <4866bea60701250609u61e72d30q21dd11c8c8fd9bcd@mail.gmail.com>
References: <45b6231b$1_2@news.bluewin.ch>	<4866bea60701230724y3a51bc31p9970075f99b70d05@mail.gmail.com>	<ep7qoe$jdg$1@sea.gmane.org>	<4866bea60701240736v837d246w187ecb1ccb90eefd@mail.gmail.com>	<epa2dh$jl3$1@sea.gmane.org>
	<4866bea60701250609u61e72d30q21dd11c8c8fd9bcd@mail.gmail.com>
Message-ID: <epasho$rf7$1@sea.gmane.org>

Chris Mellon wrote:
> On 1/25/07, Boris Borcic <bborcic at gmail.com> wrote:
>> Chris Mellon wrote:

>>>>>
>>>>> Some quick & dirty wxPython code
>>>>>
>>>>> def getTextBitmap(text, font, fgcolor, bgcolor):
>>>>>     dc = wx.MemoryDC()
>>>>>     dc.SetFont(font)
>>>>>     width, height= dc.GetTextExtent(text)
>>>>>     bmp = wx.EmptyBitmap(width, height)
>>>>>     dc.SelectObject(bmp)
>>>>>     dc.SetBackground(wx.Brush(bgcolor))
>>>>>     dc.Clear()
>>>>>     dc.SetTextBackground(bgcolor)
>>>>>     dc.SetTextForeground(fgcolor)
>>>>>     dc.DrawText(text, 0, 0)
>>>>>     dc.SelectObject(wx.NullBitmap)
>>>>>     return bmp
>>>>>
>>>>>
>>>>> Raw win32 code will look similar but will be much more verbose.
>>>> Thx again for this base.
>>>>
>>>> Quickly testing this, it appears that the result is rendered half a pixel off in
>>>> the x-direction. Does this make sense ? Is it possible to position text with
>>>> subpixel accuracy ?
<snip>
>> In short, wx._gdi_ fights quite hard to enforce what I am trying to avoid :( I
>> might admire its consistency if it extended to treating both axes similarly...
>>
> 
> I have not recently had a need to examine drawn text output this
> closely, but I am familiar with the C++ code that implements the
> drawing and it's a direct wrapping of win32 GDI calls. If it's not
> matching your source text, then the source may be drawn using a
> different method or using one of the alternate engines, like GDI+.

Maybe. In any case, color separation solves my (sub)problem : the blue layer 
from the wx generated model matches the green layer from the app's window, pixel 
for pixel (at least with antialiasing and cleartype on, while writing black on 
white).

Best, Boris Borcic




From s.mientki at id.umcn.nl  Tue Jan 16 10:24:45 2007
From: s.mientki at id.umcn.nl (stef)
Date: Tue, 16 Jan 2007 16:24:45 +0100
Subject: Projects anyone?
In-Reply-To: <1168949268.618793.102890@l53g2000cwa.googlegroups.com>
References: <1168949268.618793.102890@l53g2000cwa.googlegroups.com>
Message-ID: <cbbf1$45acee3d$83aef404$9108@news1.tudelft.nl>

placid wrote:
> Hi all,
>
> I'm looking for anyone who is working on a project at the moment that
> needs help (volunteer). The last project i worked on personally was
> screen-scraping MySpace profiles (read more at the following link)
>
> http://placid.programming.projects.googlepages.com/screen-scrapingmyspaceprofiles
>
>
> but that didn't go all to well, so im kinda bored and need something to
> do, with Python. So any suggestions anyone? 
>
> Cheers
>
>   
hello Chad,

I would have expected lots of reactions on your message,
buts as there's still none, I'll kick of.

I don't know what your knowledge and interests and

I'm just a completely newbie in Python (3..4 weeks),
so I might not have a good overview,
but coming from MatLab (and I'm not the only one who is thinking of 
switching to Python ;-)
there are a couple of fairly general modules that I'm missing in Python:
- SimuLink
- (PowerSim)

cheers,
Stef Mientki


From krypto.wizard at gmail.com  Wed Jan 31 21:42:54 2007
From: krypto.wizard at gmail.com (krypto.wizard at gmail.com)
Date: 31 Jan 2007 18:42:54 -0800
Subject: division by 7 efficiently ???
Message-ID: <1170297774.859006.29490@a75g2000cwd.googlegroups.com>

How to divide a number by 7 efficiently without using - or / operator.
We can use the bit operators. I was thinking about bit shift operator
but I don't know the correct answer.



From ktenney at gmail.com  Sun Jan 28 21:23:20 2007
From: ktenney at gmail.com (Kent  Tenney)
Date: 28 Jan 2007 18:23:20 -0800
Subject: Problems with ElementTree and ProcessingInstruction
In-Reply-To: <mailman.3253.1170035205.32031.python-list@python.org>
References: <1169994480.424321.51600@m58g2000cwm.googlegroups.com>
	<mailman.3253.1170035205.32031.python-list@python.org>
Message-ID: <1170037400.357531.35310@a34g2000cwb.googlegroups.com>



On Jan 28, 7:46 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Sunday 28/1/2007 11:28, Kent  Tenney wrote:
>
> >I want to generate the following file;
>
> ><?xml version="1.0" encoding="utf-8"?>
> ><?xml-stylesheet mystyle?>
> ><leo_file>stuff</leo_file>
>
> >How should I be doing this?open("filename","w").write('<?xml version="1.0" encoding="utf-8"?>\n'
>          '<?xml-stylesheet mystyle?>\n'
>          '<leo_file>stuff</leo_file>\n')

Right.

I can use ElementTree.write('filename')  and
prepend the instructions to the resulting file.

It leaves me curious as to the purpose/usage of 
ProcessingInstruction()

Thanks,
Kent


>
> :)
>
> >As far as I can tell, ElementTree() requires everything
> >to be inside the root element (leo_file)Just keep the first two lines on my example...
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya!http://www.yahoo.com.ar/respuestas



From Thomas.Ploch at gmx.net  Thu Jan  4 22:56:39 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Fri, 05 Jan 2007 04:56:39 +0100
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <7.0.1.0.0.20070105004837.05b36d98@yahoo.com.ar>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<7.0.1.0.0.20070105004837.05b36d98@yahoo.com.ar>
Message-ID: <459DCC77.2030708@gmx.net>

Gabriel Genellina schrieb:
> At Thursday 4/1/2007 23:52, jeremito wrote:
> 
>> I am writing a class that is intended to be subclassed.  What is the
>> proper way to indicate that a sub class must override a method?
> 
> If any subclass *must* override a method, raise NotImplementedError in
> the base class (apart from documenting how your class is supposed to be
> used).
> 
> 

I learn so much from this list. I didn't even know this error existed.

Thomas


From paul.sijben at xs4all.nl  Wed Jan 10 06:48:47 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Wed, 10 Jan 2007 12:48:47 +0100
Subject: convert binary data to int
In-Reply-To: <1168424278.193439.216770@k58g2000hse.googlegroups.com>
References: <1168424278.193439.216770@k58g2000hse.googlegroups.com>
Message-ID: <45A4D29F.3050207@xs4all.nl>

in some cases struct.unpack would also help

rubbishemail at web.de wrote:
> Hello,
> 
> 
> I need to convert a 3 byte binary string like
> "\x41\x00\x00" to 3 int values ( (65,0,0) in this case).
> The string might contain characters not escaped with a \x, like
> "A\x00\x00"
> 
> 
> Any ideas?
> 
> 
> Daniel
> 


From zhangry at feng.co.jp  Tue Jan 16 03:57:57 2007
From: zhangry at feng.co.jp (HYRY)
Date: 16 Jan 2007 00:57:57 -0800
Subject: why scipy cause my program slow?
In-Reply-To: <mailman.2769.1168936472.32031.python-list@python.org>
References: <1168935124.912419.147250@a75g2000cwd.googlegroups.com>
	<mailman.2769.1168936472.32031.python-list@python.org>
Message-ID: <1168937877.189713.239360@38g2000cwa.googlegroups.com>

Thanks, by your hint, I change type(data) to type(data[0]), and I get
<type 'float'>
<type 'numpy.float64'>
So, calculate with float is about 5x faster numpy.float64.

Robert Kern wrote:
> HYRY wrote:
> > Why the exec time of test(readdata()) and test(randomdata()) of
> > following program is different?
> > my test file 150Hz10dB.wav has 2586024 samples, so I set randomdata
> > function
> > to return a list with 2586024 samples.
> > the exec result is:
> > 2586024
> > <type 'list'>
> > 10.8603842736
> > 2586024
> > <type 'list'>
> > 2.16525233979
> > test(randomdata()) is 5x faster than test(readdata())
> > if I remove "from scipy import *" then I get the following result:
> > 2586024
> > <type 'list'>
> > 2.21851601473
> > 2586024
> > <type 'list'>
> > 2.13885042216
> >
> > So, what the problem with scipy?
>
> You're importing (through scipy) numpy's sum() function. The result type of that
> function is a numpy scalar type. The set of scalar types was introduced for a
> number of reasons, mostly having to do with being able to represent the full
> range of numerical datatypes that Python does not have builtin types for.
> Unfortunately, the code paths that get executed when arithmetic is performed
> sith such scalars are still suboptimal; I believe they are still going through
> the full ufunc machinery.
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>  that is made terrible by our own mad attempt to interpret it as though it had
>  an underlying truth."
>   -- Umberto Eco



From gagsl-py at yahoo.com.ar  Wed Jan 10 04:36:36 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 10 Jan 2007 06:36:36 -0300
Subject: Why less emphasis on private data?
In-Reply-To: <019e01c7348c$1cae4fc0$03000080@hendrik>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
	<mailman.2414.1168264117.32031.python-list@python.org>
	<pan.2007.01.08.22.24.34.419033@REMOVE.THIS.cybersource.com.au>
	<mailman.2474.1168332187.32031.python-list@python.org>
	<pan.2007.01.09.15.26.50.282717@REMOVE.THIS.cybersource.com.au>
	<019e01c7348c$1cae4fc0$03000080@hendrik>
Message-ID: <7.0.1.0.0.20070110063347.05095e20@yahoo.com.ar>

At Wednesday 10/1/2007 04:33, Hendrik van Rooyen wrote:

>Oh I am of the opposite conviction - Like the fellow of the Circuit Cellar
>I forget his name ( Steve Circia (?) ) who said:  "My favourite Programming
>Language is Solder"..

Almost right: Steve Ciarcia.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From ray223 at gmail.com  Tue Jan 16 17:21:52 2007
From: ray223 at gmail.com (ray223 at gmail.com)
Date: 16 Jan 2007 14:21:52 -0800
Subject: How can I create a linked list in Python?
In-Reply-To: <eoj6rr$90bt$1@netnews.upenn.edu>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
Message-ID: <1168986110.770209.161340@11g2000cwr.googlegroups.com>


Dongsheng Ruan wrote:
> with a cell class like this:
>
> #!/usr/bin/python
>
> import sys
>
> class Cell:
>
>  def __init__( self, data, next=None ):
>   self.data = data
>   self.next = next
>
>  def __str__( self ):
>   return str( self.data )
>
>  def echo( self ):
>   print self.__str__()


Hi,

The "How to Think Like a Computer Scientist" free book has a chapter
just for this topic:

http://greenteapress.com/thinkpython/html/chap17.html

Regards,

Ray Smith
http://RaymondSmith.com



From rweth at cisco.com  Sat Jan  6 14:13:30 2007
From: rweth at cisco.com (rweth)
Date: Sat, 06 Jan 2007 11:13:30 -0800
Subject: Adding a directory to the Python System Path - Edit the registry?
In-Reply-To: <1168057627.305211.151320@s34g2000cwa.googlegroups.com>
References: <1168017552.010631.276080@s34g2000cwa.googlegroups.com>
	<459e8fa5$0$335$e4fe514c@news.xs4all.nl>
	<1168057627.305211.151320@s34g2000cwa.googlegroups.com>
Message-ID: <1168110810.676546@sj-nntpcache-1.cisco.com>

redefined.horizons at gmail.com wrote:
> Thanks Martin.
> 
> I'll take a look at the documentation you pointed out.
> 
> Scott
> 
> Martin P. Hellwig wrote:
>> redefined.horizons at gmail.com wrote:
>>> I have been trying to find a way to add a directory to Python's sytem
>>> path on my MS Windows XP computer. I did some searching online, but the
>>> only solution I found involved editing the MS Windows Registry. That
>>> seemed a little to hard core. Is there another easier way to do this?
>>>
>>> Thanks,
>>>
>>> Scott Huey
>>>
>> Take a look at:
>> http://docs.python.org/tut/node8.html
>>
>> Specifically 6.1.1 and 6.2, perhaps that might answer your question.
>>
>> Cheers
>>
>> -- 
>> mph
> 

There is a file you can use to extend your system path on my windows box 
it is here:
    C:\Python24\Lib\site-packages\package.pth

Inside the package.pth I have added:
   C:\\QA\\bin
I think I needed to do this in linux as well (and it worked).
Find your installation path to ../Lib/site-packages and if that file 
does not exist create it and add your paths in their own lines no 
separators needed.






From kavithapython at yahoo.co.in  Tue Jan 23 03:25:35 2007
From: kavithapython at yahoo.co.in (kavitha thankaian)
Date: Tue, 23 Jan 2007 08:25:35 +0000 (GMT)
Subject: newbie question
In-Reply-To: <45B49B6E.8040900@portaone.com>
Message-ID: <550243.47113.qm@web7805.mail.in.yahoo.com>

Hi Eugene,
   
  I tried with conn.commit() as well,,but doesnt seem to work.
  Also i cannot even view the existing tables via python script.For example,,,i have manually added a customer table in my database.but if i execute the query, select * from customer,,,i get the following error:
   
  mxODBC.ProgrammingError: ('S0002', 208, "[Microsoft][ODBC SQL Server Driver][SQL  Server]Invalid object name customer.", 4612)

  If someone knows the solution please help me,,,
   
  Kavitha
Eugene Antimirov <Eugene.Antimirov at portaone.com> wrote:
  Eugene Antimirov wrote:
> You've probably missed cursor.commit() ;)
Sorry, my bad:

conn.commit() is correct one AFAIR.


-- 
Sincerely,
Eugene Antimirov
PortaOne, Inc., SIP Support Engineer
support at portaone.com

* For further Billing and Technical information:
=> Please visit our website http://www.portaone.com
=> Please visit our forum http://forum.portaone.com

* Meet us at Internet Telephony Conference & Expo
* Ft. Lauderdale, FL - January 24-26, 2007 - Booth 1322
* http://www.tmcnet.com/voip/conference/

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


 				
---------------------------------
 Here?s a new way to find what you're looking for - Yahoo! Answers 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070123/91db0f2f/attachment.html>

From http  Wed Jan 31 21:51:40 2007
From: http (Paul Rubin)
Date: 31 Jan 2007 18:51:40 -0800
Subject: division by 7 efficiently ???
References: <1170297774.859006.29490@a75g2000cwd.googlegroups.com>
Message-ID: <7xtzy6twsj.fsf@ruckus.brouhaha.com>

krypto.wizard at gmail.com writes:
> How to divide a number by 7 efficiently without using - or / operator.
> We can use the bit operators. I was thinking about bit shift operator
> but I don't know the correct answer.

Erm, sounds like a homework problem... suggestion: think of how many
input bits you have, then check the accuracy of the obvious
approximations until you reach one that's precise enough.


From opengeometry at yahoo.ca  Tue Jan 23 18:01:20 2007
From: opengeometry at yahoo.ca (William Park)
Date: Tue, 23 Jan 2007 18:01:20 -0500
Subject: spidering script
References: <8N6dnSE2eO6QKDLYnZ2dnUVZ_uejnZ2d@fdn.com>
Message-ID: <d8694$45b693c0$d1520b22$6604@PRIMUS.CA>

In <comp.os.linux.misc> David Waizer <dwaizer at noreply.com> wrote:
> Hello..
> 
> I'm  looking for a script (perl, python, sh...)or program (such as wget) 
> that will help me get a list of ALL the links on a website.

lynx -dump	(look at the bottom)

-- 
William Park <opengeometry at yahoo.ca>, Toronto, Canada
ThinFlash: Linux thin-client on USB key (flash) drive
	   http://home.eol.ca/~parkw/thinflash.html
BashDiff: Super Bash shell
	  http://freshmeat.net/projects/bashdiff/


From 12cc104 at gmail.com  Mon Jan  8 03:28:42 2007
From: 12cc104 at gmail.com (proctor)
Date: 8 Jan 2007 00:28:42 -0800
Subject: regex question
References: <1168232001.377605.236270@11g2000cwr.googlegroups.com>
	<45a1f0c6$0$18929$4c368faf@roadrunner.com>
	<1168243020.304940.212700@42g2000cwt.googlegroups.com>
	<pan.2007.01.08.08.15.54.609742@REMOVEME.cybersource.com.au>
Message-ID: <1168244922.620428.273260@38g2000cwa.googlegroups.com>


Steven D'Aprano wrote:
> On Sun, 07 Jan 2007 23:57:00 -0800, proctor wrote:
>
> > it does work now...however, one more question:  when i type:
> >
> > rx_a = re.compile(r'a|b|c')
> > it works correctly!
> >
> > shouldn't:
> > rx_a = re.compile(makeRE(test))
> > give the same result since makeRE(test)) returns the string "r'a|b|c'"
>
> Those two strings are NOT the same.
>
> >>> s1 = r'a|b|c'
> >>> s2 = "r'a|b|c'"
> >>> print s1, len(s1)
> a|b|c 5
> >>> print s2, len(s2)
> r'a|b|c' 8
>
> A string with a leading r *outside* the quotation marks is a raw-string.
> The r is not part of the string, but part of the delimiter.
>
> A string with a leading r *inside* the quotation marks is just a string
> with a leading r. It has no special meaning.
>
>
>
> --
> Steven D'Aprano

thanks steven,

is there any way i would be successful then, in using raw string inside
my makeRE() function?

proctor.



From sean at datafly.net  Tue Jan 23 03:01:12 2007
From: sean at datafly.net (Sean Schertell)
Date: Tue, 23 Jan 2007 17:01:12 +0900
Subject: How to use dynamic properties? <-- Noob
Message-ID: <BCF1D59F-ECFE-4F43-AC2A-797A6E344638@datafly.net>

person.name = 'Joe'
person.age = 20
person.sex = 'm'

info_I_need = name

print person.info_I_need

# How can I make it print 'Joe' ?


Sean


::::  DataFly.Net  ::::
Complete Web Services
http://www.datafly.net



From smusnmrNOSPAM at yahoo.com  Fri Jan  5 08:57:25 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Fri, 5 Jan 2007 14:57:25 +0100
Subject: where to find wx package
References: <enl7h1$49m$1@zam602.zam.kfa-juelich.de>
	<mailman.2318.1167991773.32031.python-list@python.org>
Message-ID: <enllg5$6hj$1@zam602.zam.kfa-juelich.de>

Thanks to you, too, Robert!

siggi

"Robert Kern" <robert.kern at gmail.com> schrieb im Newsbeitrag 
news:mailman.2318.1167991773.32031.python-list at python.org...
> siggi wrote:
>> Hi all,
>>
>> a newbie question:
>>
>> I have a program gui03A.py using wxPython, importing it such:
>> "from wxPython.wx import *"
>>
>> The program works, but I get the warning message:
>>
>> "gui03A.py:4: DeprecationWarning: The wxPython compatibility package is 
>> no
>> longer  automatically generated or activly maintained.  Please switch to 
>> the
>> wx package  as soon as possible."
>>
>> However, after extensive searching on www.python.org and Googling the 
>> web, I
>> do not find any package with "wx" as its only name.
>>
>> Where can I get the wx package (for win32 XP)?
>
> It's the same project (from the people at www.wxpython.org), they just 
> renamed
> the package. You already have it installed.
>
> -- 
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless 
> enigma
> that is made terrible by our own mad attempt to interpret it as though it 
> had
> an underlying truth."
>  -- Umberto Eco
> 




From tkpmep at hotmail.com  Wed Jan 17 11:31:07 2007
From: tkpmep at hotmail.com (tkpmep at hotmail.com)
Date: 17 Jan 2007 08:31:07 -0800
Subject: Globbing files by their creation date
References: <1168954453.954486.188680@m58g2000cwm.googlegroups.com>
	<mailman.2774.1168955078.32031.python-list@python.org>
	<6L2dnaxFNt0tqzDYnZ2dnUVZ_vPinZ2d@99main.com>
Message-ID: <1169051467.179899.178570@s34g2000cwa.googlegroups.com>


Thanks a mill - os.path.getctime(f) is what I needed. Unfortunately, my
attempts to turn the integer it returns into a date have failed.

>>> os.path.getctime(fn)    #fn was created today, 1/17/2007
1168955503

I tried to convert this to a date object by typing
>>>datetime.date.fromordinal(1168955503)

Traceback (most recent call last):
  File "<pyshell#9>", line 1, in -toplevel-
    datetime.date.fromordinal(1168955503)
ValueError: year is out of range

How can I do the conversion? I'm trying to identify all files that were
created after YYYY/MM/DD.

For a quick sanity check, I ran
>>> datetime.date.today().toordinal()
732693

which is orders of magnitude smaller than the number returned by
os.path.getctime(fn).

Thanks in advance for your help

Thomas Philips



From nospam at nospam.com  Mon Jan 29 21:26:30 2007
From: nospam at nospam.com (Hampton Din)
Date: Mon, 29 Jan 2007 20:26:30 -0600
Subject: Excellent Interview with Dennis D'Souza, full of laughs
References: <1170083292.991070.79560@v33g2000cwv.googlegroups.com>
	<45be1d27$0$97248$892e7fe2@authen.yellow.readfreenews.net>
	<1170087497.071441.118560@s48g2000cws.googlegroups.com>
	<6Mqvh.5640$fC2.95@bignews4.bellsouth.net>
	<1170114420.772278.7130@a75g2000cwd.googlegroups.com>
Message-ID: <45beacc4$0$97225$892e7fe2@authen.yellow.readfreenews.net>



        still a stupid troll. 




From aboudouvas at panafonet.gr  Fri Jan  5 07:00:49 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 5 Jan 2007 04:00:49 -0800
Subject: program deployment
Message-ID: <1167998448.978001.3720@38g2000cwa.googlegroups.com>

hi to all folks here,

i am learning Python, just finished a book and i am starting to write
programs.
I just want to ask, is the "correct" way to deploy my programs to other
computers, the .pyc files ??

I now that with the "-m compileall ." switch can compile a .py file
into bytecodes. So i suppose that if Python has to run a .pyc file, it
will load and execute it faster. And if i have some "sensitive" data in
my source, like passwords (and the source of cource!) they will be more
secure in a compiled file.

Is that correct ?

Thanks a lot for any help!



From eurleif at ecritters.biz  Mon Jan 29 00:09:48 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Mon, 29 Jan 2007 00:09:48 -0500
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
Message-ID: <45bd8130$0$17928$4d3efbfe@news.sover.net>

NoName wrote:
> from random import choice
> import string
> print ''.join([choice(string.letters+string.digits) for i in 
> range(1,8)])
> 
> !!generate password once :(

So add a while true: line.

> who can write this smaller or without 'import'?

Why are those your goals?


From nanjundi at gmail.com  Sun Jan 21 17:35:19 2007
From: nanjundi at gmail.com (Nanjundi)
Date: 21 Jan 2007 14:35:19 -0800
Subject: instancemethod
In-Reply-To: <mailman.2961.1169417800.32031.python-list@python.org>
References: <mailman.2961.1169417800.32031.python-list@python.org>
Message-ID: <1169418918.963891.196080@m58g2000cwm.googlegroups.com>

>
> if __name__ == '__main__':
>     gert=Db('localhost','root','******','gert')
>     gert.excecute('select * from person')
>     for x in range(0,gert.rowcount):
>         print gert.fetchone()
>     gert.close()
>
> gert at gert:~$ python ./Desktop/svn/db/Py/db.py
> Traceback (most recent call last):
>   File "./Desktop/svn/db/Py/db.py", line 35, in <module>
>     for x in range(0,gert.rowcount):
> TypeError: range() integer end argument expected, got instancemethod.
> gert at gert:~$
>
> Can anybody explain what i must do in order to get integer instead of
> a instance ?

Gert,
>     for x in range(0,gert.rowcount):
gert.rowcount is the method (and not a data attribute).
gert.rowcount() is the method call, which get the return value from
method. 

So try this.
for x in range( 0,gert.rowcount() ):

-N



From bj_666 at gmx.net  Sun Jan 28 02:33:32 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 28 Jan 2007 08:33:32 +0100
Subject: import from future
References: <1169969100.946843.111770@p10g2000cwp.googlegroups.com>
Message-ID: <pan.2007.01.28.07.33.31.94200@gmx.net>

In <1169969100.946843.111770 at p10g2000cwp.googlegroups.com>, lee wrote:

> what are the things that we can do with import from future usage.....i 
> heard its very interesting......thanks

Here's how to find out yourself (done with a 2.4 release):

In [2]: import __future__

In [3]: dir(__future__)
Out[3]:
['CO_FUTURE_DIVISION',
 'CO_GENERATOR_ALLOWED',
 'CO_NESTED',
 '_Feature',
 '__all__',
 '__builtins__',
 '__doc__',
 '__file__',
 '__name__',
 'all_feature_names',
 'division',
 'generators',
 'nested_scopes']

In [4]: __future__.all_feature_names
Out[4]: ['nested_scopes', 'generators', 'division']

In [5]: __future__.division
Out[5]: _Feature((2, 2, 0, 'alpha', 2), (3, 0, 0, 'alpha', 0), 8192)

In [6]: help(__future__)
<snipped help output>

Ciao,
	Marc 'BlackJack' Rintsch


From tim at tdw.net  Sat Jan 13 06:23:57 2007
From: tim at tdw.net (Tim Williams)
Date: Sat, 13 Jan 2007 11:23:57 +0000
Subject: WMI Python, writing remotely and retrieving env variables values
In-Reply-To: <G62780716.230.2057.1@mxextra>
References: <1168637924.982266.214250@s34g2000cwa.googlegroups.com>
	<G62780716.230.2057.1@mxextra>
Message-ID: <9afea2ac0701130323v3e39080o44c85596a7874916@mail.gmail.com>

On 13 Jan 2007 02:01:11 -0800, Tim Golden <tjgolden at gmail.com> wrote:
> Thierry Lam wrote:
> > I'm using the WMI library for python and I was able to connect to
> > another computer on the network with the following line:
> >
> > c = wmi.WMI(computer="the-network-computer", user="hello",
> > password="hello")
> >
> > Is there a way to write information to a file on that computer?
> >
> > How do I read environment variables, for example SystemDrive?
>
> Questions of this sort are really Win32 questions rather than Python
> questions. That's not to say we can't help, but rather that you can
> probably find an answer by going to a search engine of your choice
> and typing in, say, "WMI SystemDrive". I did that, and the first hit
> (from Google) was:
>
> http://msdn2.microsoft.com/en-us/library/aa394239.aspx
>
> which indicates that it's available from the Win32_OperatingSystem
> WMI class. So, in Python:
>
> <code>
> import wmi
> c = wmi.WMI () # optionally on another computer
> for os in c.Win32_OperatingSystem ():
>   print os # show the whole thing
>   print os.SystemDrive # get only what you want
>
> </code>
>
> If you were after Environment Variables, then search again,
> this time for "WMI Environment Variables". Third hit:
>
> http://msdn2.microsoft.com/en-us/library/aa394143.aspx
>
> pointing to the Win32_Environment class. And so on.
>
> Your first question: can I write into a file? is a little
> more tricky. As far as I know, there's no way even to
> *create* a file with WMI, let alone write information into
> it. It's not really a file-manipulation technology. You can
> get hold of the name of a remote file and other of its
> properties via the CIM_DataFile class, but you'd have
> to translate that into an accessible UNC to be able to
> access it.
>

One possibility is to create a hidden share on the remote computer and
write to a file on it.

Shares ending in $ are hidden,    the unc path would be \\machinename\share$

According to http://msdn2.microsoft.com/en-us/library/aa394594.aspx
you need the WMI Win32_Share class and the Create method.

HTH :)


From gagsl-py at yahoo.com.ar  Thu Jan 11 23:05:45 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 12 Jan 2007 01:05:45 -0300
Subject: Python nuube needs Unicode help
In-Reply-To: <1168550858.233814.292900@p59g2000hsd.googlegroups.com>
References: <1168550858.233814.292900@p59g2000hsd.googlegroups.com>
Message-ID: <7.0.1.0.0.20070112004929.05978ec8@yahoo.com.ar>

At Thursday 11/1/2007 18:27, gheissenberger at gmail.com wrote:

>HELP!
>Guy who was here before me wrote a script to parse files in Python.
>
>Includes line:
>print u
>where u is a line from a file we are parsing.
>However, we have started recieving data from Brazil. If I open file to
>parse in VI, looks like:
>
><Utt id="3" transcribe="yes" audioRoot="A1"
>audio="313-20070102144528.wav" grammarSet="G3" rawText="n&#227;o"
>recValue="{data:CHOICE=NO;}" conf="970" rawText2="" conf2="0"
>transcribedText="n&#227;o" parsableText="n&#227;o"/

Is this part of an XML document? You should use a 
true XML parser instead of doing that by hand.

>Clearly those "n&#227" are some non-Ascii characters, but how do I get
>print to understand that?

Understanding how Unicode works may be very 
useful: http://www.amk.ca/python/howto/unicode

>I keep getting:
>"UnicodeEncodeError: 'ascii' codec can't encode character u'\xe3' in
>position 40:
>  ordinal not in range(128)"

py> u = u"?????"
py> print u, repr(u)
????? u'\xe1\xe9\xed\xf3\xfa'
py> print str(u)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
UnicodeEncodeError: 'ascii' codec can't encode 
characters in position 0-4: ordin
al not in range(128)
py> print u.encode('cp850')
?????

(cp850 is my console encoding)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From eurleif at ecritters.biz  Wed Jan 10 19:06:32 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Wed, 10 Jan 2007 19:06:32 -0500
Subject: Legally correct way of copying stdlib module?
Message-ID: <45a57f65$0$15152$4d3efbfe@news.sover.net>

I'm writing a package where I need to use the uuid module. 
Unfortunately, that module is only available in Python 2.5, and my 
package needs to be compatible with 2.4. I'm planning to copy it from 
Python 2.5's stdlib into my package, and import it like this:

try:
     import uuid
except ImportError:
     from mypackage import _uuid as uuid

However, I'm concerned about how to do this in a legal way. uuid.py is 
presumably released under the Python license, but the file itself 
includes no mention of this. Should I copy the Python license as a 
comment into my _uuid.py? Do I need a copyright statement too (and if 
so, how do I know who owns the copyright to that particular module)?


From robert.kern at gmail.com  Sat Jan 20 17:55:56 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 20 Jan 2007 16:55:56 -0600
Subject: scipy.optimize.lbfgsb help please!!!
In-Reply-To: <eotep7$ik$1@gemini.csx.cam.ac.uk>
References: <eotep7$ik$1@gemini.csx.cam.ac.uk>
Message-ID: <eou6m8$7d3$1@sea.gmane.org>

mclaugb wrote:
> Does anyone out there have a piece of code that demonstrates the use of the 
> lbfgsb multivariate, bounded solver in the scipy.optimize toolkit?  An 
> example would get me started because my code below does not seem to work.

You will probably get better/faster/more answers on the scipy-user mailing list.

  http://www.scipy.org/Mailing_Lists

> Permmin is a function that simply returns a vector array [xmin, ymin]

This is your problem. The function to minimize must return a scalar, not a
vector. This is not a multi-objective optimizer.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From bearophileHUGS at lycos.com  Sun Jan 14 15:04:56 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 14 Jan 2007 12:04:56 -0800
Subject: help with recursion on GP project
In-Reply-To: <45aa8784$0$5803$4c368faf@roadrunner.com>
References: <45aa8784$0$5803$4c368faf@roadrunner.com>
Message-ID: <1168805096.401513.106040@q2g2000cwa.googlegroups.com>

First possible raw solution:

from operator import add, sub, mul, div, neg

def evaluate(expr):
    if isinstance(expr, list):
        fun, ops = expr[0], expr[1:]
        return fun(*map(evaluate, ops))
    else:
        return expr

example = [add, [add, [sub, 5, 4], [mul, 3, 2]], [neg, 5]]
print evaluate(example)

But it's rather slow...

Bye,
bearophile



From carsten at uniqsys.com  Wed Jan 10 17:31:19 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 10 Jan 2007 17:31:19 -0500
Subject: where to find the spec of format in PyObject_CallMethod
In-Reply-To: <1168466755.996033.130120@i39g2000hsf.googlegroups.com>
References: <1168466755.996033.130120@i39g2000hsf.googlegroups.com>
Message-ID: <1168468279.3413.31.camel@dot.uniqsys.com>

On Wed, 2007-01-10 at 14:05 -0800, Huayang Xia wrote:
> I am trying to use PyObject_CallMethod. It needs a format string to
> specify what are the followed arguments. Is it possible to use a
> PyObject* as an argument?
> 
> Where can I find the spec for the format?
> 
> Thanks in advance.

See http://docs.python.org/api/object.html#l2h-247 :

Note in particular "The C arguments are described by a Py_BuildValue()
format string that should produce a tuple" and "Note that if you only
pass PyObject * args, PyObject_CallMethodObjArgs is a faster
alternative."

So, If all your arguments are PyObject pointers, use
PyObject_CallMethodObjArgs instead. Otherwise, use PyObject_CallMethod
and consult the documentation for Py_BuildValue on how to construct the
format string.

Hope this helps,

Carsten.




From george.sakkis at gmail.com  Thu Jan 25 12:26:01 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 25 Jan 2007 09:26:01 -0800
Subject: assertions to validate function parameters
In-Reply-To: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
References: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
Message-ID: <1169745961.524921.155070@v33g2000cwv.googlegroups.com>

On Jan 25, 11:54 am, Matthew Wilson <m... at tplus1.com> wrote:

> Lately, I've been writing functions like this:
>
> def f(a, b):
>
>     assert a in [1, 2, 3]
>     assert b in [4, 5, 6]
>
> The point is that I'm checking the type and the values of the
> parameters.
>
> I'm curious how this does or doesn't fit into python's duck-typing
> philosophy.
>
> I find that when I detect invalid parameters overtly, I spend less time
> debugging.
>
> Are other people doing things like this?  Any related commentary is
> welcome.
>
> Matt

Well, duck (or even static for that matter) typing can't help you if
you're checking for specific *values*, not types. The real question is
rather, is f() intended to be used in the "outside world" (whatever
this might be; another program, library, web service, etc.) or is it to
be called only by you in a very controlled fashion ?

In the first case, passing an invalid input is a *user error*, not a
*programming error*. Assertions should be used for programming errors
only to assert invariants, statements which should be correct no matter
what; their violations mean that the code is buggy and should be fixed
asap.

User errors OTOH should be handled by explicit checking and raising
appropriate exceptions, e.g. ValueError or a subclass of it. There are
several reasons for this but a very practical one is that a user can
turn off the assertions by running python with '-O' or '-OO'.
Optimization flags should never change the behavior of a program, so
using assertions for what's part of the normal program behavior
(validating user-provided input) is wrong.

George



From skip at pobox.com  Fri Jan 19 19:05:56 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 19 Jan 2007 18:05:56 -0600
Subject: float comparison confusion
In-Reply-To: <1169250923.146916.206430@s34g2000cwa.googlegroups.com>
References: <1169250923.146916.206430@s34g2000cwa.googlegroups.com>
Message-ID: <17841.23780.872739.936331@montanaro.dyndns.org>


    chrolson> Why is cmp returning -1 instead of returning positive integer?

Last time I checked 20.1 was less than 20.9.

Skip


From martin at v.loewis.de  Mon Jan  8 02:48:22 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 08 Jan 2007 08:48:22 +0100
Subject: Module to read svg
In-Reply-To: <1168225193.883421.185140@s80g2000cwa.googlegroups.com>
References: <1168225193.883421.185140@s80g2000cwa.googlegroups.com>
Message-ID: <45a1f746$0$27874$9b622d9e@news.freenet.de>

schpok at gmail.com schrieb:
> Does anyone know if there's an actual free implementation of this?

For the dom module in it, xml.dom.minidom should work. Depending on
your processing needs, that might be sufficient.

Regards,
Martin


From s.mientki at id.umcn.nl  Mon Jan 22 03:38:37 2007
From: s.mientki at id.umcn.nl (stef)
Date: Mon, 22 Jan 2007 09:38:37 +0100
Subject: Python Windows Editors
In-Reply-To: <mailman.2970.1169426809.32031.python-list@python.org>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>	<79e7c$45b3facb$d443bb3a$7251@news.speedlinq.nl>
	<mailman.2970.1169426809.32031.python-list@python.org>
Message-ID: <5ec4b$45b47813$83aef404$7970@news1.tudelft.nl>

gonzlobo wrote:
> I prefer PyScripter too, but would like to know if I can have
> 'indentation guides' enabled like PythonWin allows.
If you mean, typing a for-statement, then when placing the final ":"+Enter,
the indentation auto increases,
then the answer is yes,
otherwise I don't kno what you mean.

cheers,
Stef Mientki


From ptmcg at austin.rr._bogus_.com  Tue Jan  9 07:11:25 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 9 Jan 2007 06:11:25 -0600
Subject: A simple array in Python
References: <1168337391.770307.54750@11g2000cwr.googlegroups.com>
Message-ID: <45a3866c$0$5805$4c368faf@roadrunner.com>

<bg_ie at yahoo.com> wrote in message 
news:1168337391.770307.54750 at 11g2000cwr.googlegroups.com...
> Hi,
>
> I have the following enum -
>
> class State:
> Fire = 0
> Water = 1
> Earth = 2
>
> And I want a variable which holds a value for each of these states,
> something like -
>
> myState1[State.Fire] = 10
> myState1[State.Earth] = 4
>
> myState2[State.Fire] = 20
> myState2[State.Earth] = 24
>
> How do I do this?
>
> Thanks Barry.
>
How about (arrays are sooo last century):

class State(object):
    def __init__(self,**kwargs):
        self.__dict__.update(kwargs)

myState1 = State(Fire=10, Earth=4)
myState2 = State(Fire=20, Earth=24)

print myState1.Fire
print myState2.Earth

-- Paul




From redefined.horizons at gmail.com  Fri Jan  5 12:15:42 2007
From: redefined.horizons at gmail.com (redefined.horizons at gmail.com)
Date: 5 Jan 2007 09:15:42 -0800
Subject: Dividing integers...Convert to float first?
Message-ID: <1168017342.255981.134400@11g2000cwr.googlegroups.com>

I'm still pretty new to Python. I'm writing a function that accepts
thre integers as arguments. I need to divide the first integer by te
second integer, and get a float as a result. I don't want the caller of
the function to have to pass floats instead of integers. How do I
convert the arguments passed to the function into floats before I do
the division? Is this necessary, or is their a better way?

Thanks,

Scott Huey



From luismgz at gmail.com  Tue Jan  9 22:50:57 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 9 Jan 2007 19:50:57 -0800
Subject: Python - C# interoperability
In-Reply-To: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>
References: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>
Message-ID: <1168401054.044692.187040@77g2000hsv.googlegroups.com>


mc wrote:
> Is there an easy way to compile a Python class (or set of classes) into
> a .DLL that a C# program can call?  Or otherwise to use an existing
> library of Python classes from a C# program as seamlessly as possible?

I'm affraid this is not possible.
Ironpython (the .NET python implementation) can consume assemblies
written in other statically typed languages, such as c#, but not the
other way around.
This is because Ironpython is still a dynamic language, and the lack of
type information makes it impossible to be compiled as c#.

For the time being, if you really need to write reusable assemblies
that could be consumed from other .NET languages, you shouldn't use
Ironpython.
You should use c#, vb.net or any other static language implementation
for .NET.

If you want a more "pythonic" alternative, you could use Boo (
http://boo.codehaus.org ).
It's a static language with a python-like syntax, and it's very easy to
pick up if you already know python.

For consuming Boo assemblies from Ironpython, you should compile them
as .DLL, and place them into a "DLLs" folder in your Ironpython root
directory (where ipy.exe is located).
Then you simply import them as you would with any other python module.
Make sure to add also the boo assembly. If you are using c# instead,
you don't have to add anything else.

Hope this helps,
Luis



From larry.bates at websafe.com  Tue Jan  9 16:11:52 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 09 Jan 2007 15:11:52 -0600
Subject: Summarizing data by week
In-Reply-To: <1168372624.543712.149070@77g2000hsv.googlegroups.com>
References: <1168372624.543712.149070@77g2000hsv.googlegroups.com>
Message-ID: <E8Kdnc6dkuqLmDnYnZ2dnUVZ_rmdnZ2d@comcast.com>

Mike Orr wrote:
> What's the best way to summarize data by week?  I have a set of
> timestamped records, and I want a report with one row for each week in
> the time period, including zero rows if there are weeks with no
> activity.  I was planning to use ISO weeks because datetime has a
> convenient .isocalendar() method, but I want each output row to have a
> label like this:
> 
>     2006 week 5 (Feb)
> 
> However, to get the month (of the Thursday of that week) I have to
> convert it back to an actual date,and I don't see a method to do that
> in datetime or dateutil or mx.DateTime.
> 
> I was planning to use a dateutil.rrule to generate the weeks from the
> minimum to maximum date, including any weeks that have no activity (so
> they won't be in the dictionary).  But rrule sequences are based on an
> actual start date, not an ISO week, so that won't work.  Unless perhaps
> I take the minimum date and calculate the Thursday of that week, and
> start from there.  Then all my conversions would be to iso_week rather
> than from iso_week.
> 
> Is there a better way to do this?
> 
> --Mike
> 

Generally I always check the day of week (DOW) of the beginning
and ending dates in the sequence and adjust them so that they
align with "real" weeks.  Then it is usually as easy as adding
7 days inside the loop to increment each row.  I'm not 100% sure
I understand the problem but perhaps this will help.

-Larry


From cvanarsdall at mvista.com  Fri Jan 26 12:26:43 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Fri, 26 Jan 2007 09:26:43 -0800
Subject: The reliability of python threads
In-Reply-To: <01b001c7411d$17e52a20$03000080@hendrik>
References: <mailman.3092.1169657938.32031.python-list@python.org><ep8gue$3tu$1@panix3.panix.com>	<45B90118.5010408@mvista.com>
	<01b001c7411d$17e52a20$03000080@hendrik>
Message-ID: <45BA39D3.7020400@mvista.com>

Hendrik van Rooyen wrote:
>  "Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote:
>
>   
>> [snip]
>>     
>
> Are you 100% rock bottom gold plated guaranteed sure that there is
> not something else that is also critical that you just haven't realised is?
>   
100%?  No, definitely not.  I know myself, as I explore this option and 
other options, I will of course be going into and out of the code, 
looking for that small piece I might have missed.  But I'm like a modern 
operating system, I do lots of things at once.  So after being unable to 
solve it the first few times, I thought to pose a question, but as I 
pose the question that never means that I'm done looking at my code and 
hoping I missed something.  I'd much rather have this be my fault... 
that means I have a much higher probability of fixing it.  But i sought 
to explore some tips given to me.   Ah, but the day I could be 100% 
sure, that would be a good day (hell, i'd go ask for a raise for being 
the best coder ever!)

> This stuff is never obvious before the fact - and always seems stupid
> afterward, when you have found it.  Your best (some would say only)
> weapon is your imagination, fueled by scepticism...
>
>   
Yea, seriously!


>> try and get a better understanding might be to check data before its 
>> stored.  Again, I still don't know how it would get messed up nor can I 
>> reproduce the error on my own. 
>>
>> Do any of you think that would be a good practice for trying to track 
>> this down? (Check the data after reading it, check the data before 
>> saving it)
>>     
>
> Nothing wrong with doing that to find a bug - not as a general 
> practice, of course - that would be too pessimistic.
>
> In hard to find bugs - doing anything to narrow the time and place
> of the error down is fair game - the object is to get you to read
> some code that you *know works* with new eyes...
>
>   
I really like that piece of wisdom, I'll add that to my list of coding 
mantras.  Thanks!

> I build in a global boolean variable that I call trace, and when its on
> I do all sort of weird stuff, giving a running commentary (either by
> print or in some log like file) of what the programme is doing, 
> like read this, wrote that, received this, done that here, etc.
> A bare useful minimum is a "we get here" indicator like the routine
> name, but the data helps a lot too.
>
>   
Yea, I do some of that too.  I use that with conditional print 
statements to stderr when i'm doing my validation against my test 
cases.  But I could definitely do more of them.  The thing will be 
simulating the failure.  In the production server, thousands of printed 
messages would be bad. 

I've done short but heavy simulations, but to no avail.  For example, 
I'll have a couple systems infinitely loop and beat on the system.  This 
is a much heavier load than the system will ever normally face, as its 
hit a lot at once and then idles for a while.  The test environment 
constantly hits it, and I let that run for several days.  Maybe a longer 
run is needed, but how long is reasonable before determining that its 
something beyond my control?

> Compared to an assert, it does not stop the execution, and you
> could get lucky by cross correlating such "traces" from different
> threads. - or better, if you use a queue or a pipe for the "log", 
> you might see the timing relationships directly.
>   
Ah, store the logs in a rotating queue of fixed size?  That  would work 
pretty well to maintain control on a large run, thanks!

> But this in itself is fraught with danger, as you can hit file size 
> limits, or slow the whole thing down to unusability.
>
> On the other hand it does not generate the volume that a genuine 
> trace does, it is easier to read, and you can limit it to the bits that
> you are currently suspicious of.
>
> Programming is such fun...
>   
Yea, I'm one of those guys who really gets a sense of satisfaction out 
of coding.  Thanks for the tips.

-carl

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From eurleif at ecritters.biz  Sun Jan 28 23:41:19 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sun, 28 Jan 2007 23:41:19 -0500
Subject: Convert from unicode chars to HTML entities
In-Reply-To: <pan.2007.01.29.03.05.23.166735@REMOVEME.cybersource.com.au>
References: <pan.2007.01.29.03.05.23.166735@REMOVEME.cybersource.com.au>
Message-ID: <45bd7a82$0$17928$4d3efbfe@news.sover.net>

Steven D'Aprano wrote:
> I have a string containing Latin-1 characters:
> 
> s = u"? and many more..."
> 
> I want to convert it to HTML entities:
> 
> result =>
> "&copy; and many more..."
> 
> Decimal/hex escapes would be acceptable:
> "&#169; and many more..."
> "&#xA9; and many more..."

 >>> s = u"? and many more..."
 >>> s.encode('ascii', 'xmlcharrefreplace')
'&#169; and many more...'


From tjgolden at gmail.com  Tue Jan 16 10:51:16 2007
From: tjgolden at gmail.com (Tim Golden)
Date: 16 Jan 2007 07:51:16 -0800
Subject: Search Queue
In-Reply-To: <1168960945.787822.286690@s34g2000cwa.googlegroups.com>
References: <1168960945.787822.286690@s34g2000cwa.googlegroups.com>
Message-ID: <1168962673.664083.146220@38g2000cwa.googlegroups.com>

abcd wrote:
> I have a class such as...

[... ]

> And I am storing them in a Queue.Queue...
>
> import Queue
> q = Queue.Queue()
> q.put(Foo('blah'))
> q.put(Foo('hello world'))
> q.put(Foo('test'))
>
> how can I search "q" for an instance of Foo which has 'id' equal to say
> 2?  Typically a queue only lets you put and get, not really search.

It's possible you're seeing the Queue structure as
some sort of list / array, rather than its intended purpose
as a thread-safe channel. If I'm wrong, ignore the rest of
this post. If, however, you're just after a container for
various instances of Foo then use a list or a dict,
depending on what you're after.

eg,

<code>
class Foo:
  def __init__ (self, id):
    self.id = id

list_of_foos = [Foo('blah'), Foo('hello'), Foo('test')]
dict_of_foos = dict ((f.id, f) for f in list_of_foos)

print dict_of_foos['blah']

</code>

TJG



From chris at kateandchris.net  Tue Jan  2 11:43:01 2007
From: chris at kateandchris.net (Chris Lambacher)
Date: Tue, 2 Jan 2007 11:43:01 -0500
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167526509.471697.320750@v33g2000cwv.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
Message-ID: <20070102164301.GA9471@kateandchris.net>

On Sat, Dec 30, 2006 at 04:55:09PM -0800, Ben Sizer wrote:
> Martin v. L?wis wrote:
> 
> > Ben Sizer schrieb:
> > > I've installed several different versions of Python across several
> > > different versions of MS Windows, and not a single time was the Python
> > > directory or the Scripts subdirectory added to the PATH environment
> > > variable. Every time, I've had to go through and add this by hand, to
> > > have something resembling a usable Python installation. No such
> > > problems on Linux, whether it be Mandrake/Mandriva, Fedora Core, or
> > > Kubuntu. So why is the Windows install half-crippled by default?
> >
> > For several reasons:
> > 1. Python can be used just fine without being on PATH. Python
> >    scripts run fine both when double-clicked and when invoked in
> >    the command line, and if you want to use an interactive
> >    interpreter, you can find it readily on the Start menu.
> 
> Yet many scripts and applications require parameters, or to be executed
> from a certain directory. For example, setup.py. Or the various
> turbogears scripts. Or easy_install.
Martin's point was that if you need to pass arguments, you can call the script
from the command line like so:
setup.py install

The python part of the 'python setup.py install' idiom needs to be omitted on
Windows, but that does not mean that the solution is to automatically add it
to PATH.

> > 2. Many windows users (including myself) dislike setup routines that
> >    manipulate PATH.
> 
> My opinion is that this is not as big a problem as some may feel that
> it is. Unlike Unix systems, the PATH variable is rarely used. Most
> applications are launched via the Start Menu, which uses absolute
> paths, or via file associations, also done via absolute paths. The
> chance of a naming collision only really arises when you start using
> the command line, which most people don't do.
> 
> However, among those who will use the command line, are some people new
> to Python, who will come across instructions like this:
> 
> <http://docs.python.org/inst/standard-install.html>
> 
> 
> Pretty much none of the instructions in that part of the docs will work
> without you altering your path beforehand. Python's cross-platform
> nature means people rightly expect the same instructions to work on
> Linux and Windows from a standard installation. Right now, they don't.

The documentation is misleading... time for a but report:
http://sourceforge.net/tracker/index.php?func=detail&aid=1626300&group_id=5470&atid=105470

> > if Python is to be found in PATH, it
> >    should rather be installed to a directory that is known to live
> >    on PATH (or where CreateProcess searches, anyway, such
> >    as system32). So if the installer had such a feature, it should
> >    be optional, and it should default to "off".
> 
> It's a lot more anti-social to install to system32 than to modify the
> PATH variable. How easy is it to temporarily undo an installation to a
> system directory like that? What if you still want Python in your path
> but with less precedence than some other user directory?
I agree an optional add to PATH, should just add to the path rather than
install python.exe into a location on the path.
> 
> > 3. Most importantly: it is difficult to implement, and nobody has
> >    contributed code to make it work.
> 
> There appears to be a freely-available binary at this address that may
> suffice:
> http://legroom.net/modules.php?op=modload&name=Open_Source&file=index&page=software&app=modpath
Unfortunately the Python installer is not an InnoSetup installer.  If you
converted this code to Python you might get farther since the MSI could call
an add2path script with the newly installed Python executable.  I am sure
submitting a patch for the installer option would also help your cause.

-Chris


From goodidea1950 at hotmail.spam.com  Thu Jan 25 03:25:38 2007
From: goodidea1950 at hotmail.spam.com (AKA gray asphalt)
Date: Thu, 25 Jan 2007 00:25:38 -0800
Subject: Do I need Python to run Blender correctly?
Message-ID: <tRZth.2027$pH3.140@newsfe12.phx>

I downloaded Blender but there was no link for python. Am I on the right 
track?




From mail at microcorp.co.za  Fri Jan 12 00:48:24 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 12 Jan 2007 07:48:24 +0200
Subject: Is there a way to protect a piece of critical code?
References: <mailman.2524.1168424917.32031.python-list@python.org>	<eo2pgf$j57$1@news.albasani.net><mailman.2558.1168494787.32031.python-list@python.org>
	<eo50g4$hct$1@news.albasani.net>
Message-ID: <007901c7360d$469393e0$03000080@hendrik>

"robert" <no-spam at no-spam-no-spam.invalid> wrote:


> pushing data objects through an inter-thread queue is a major source for
trouble - as this thread shows again.
> Everybody builds up a new protocol and worries about Empty/Full,
Exception-handling/passing, None-Elements, ...
> I've noticed that those troubles disappear when a functional queue is used -
which is very easy with a functional language like Python.
> For example with
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491281
>
>
> One would just use a  cq=CallQueue()
>
> On the producer side one would just write the functional code one wants to
execute in a target thread:
>
> cq.call( what_i_want_do_func )
>
>
> The consumer/receiver thread would just do (periodically) a non-blocking
>
> cq.receive()
>
>
> => Without any object fumbling, protocol worries and very fast.
>
> And note: This way - working with functional jobs - one can also "protect a
piece of critical code" most naturally and specifically for certain threads
without spreading locks throughout the code.
> Even things which are commonly claimed "forbidden" (even when using lots of
locks) can be magically done in perfect order and effectively this way. Think of
worker threads doing things in the GUI or in master / database owner threads
etc.
>
> Similarly discrete background thread jobs can be used in a functional style
this way:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491280
> ( an alternative for the laborious OO-centric threading.Thread which mostly is
a lazy copy from Java )
> or for higher job frequencies by using "default consumer threads" as also
shown in the 1st example of
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491281
>

Thank you - had a (very) quick look and I will return to it
later - It is not immediately obvious to my assembler
programmer's mentality - looks like in the one case
the thread starts up, does its job and then dies, and in
the other its a sort of "remote" daemon like engine,
that you can "tell what to do", from "here"...

Both concepts seem nice and I will try to wrap my head
around them properly.

So far I have only used dicts to pass functions around
in a relatively unimaginative static jump table like way...

Thanks.

- Hendrik



From garyjefferson123 at yahoo.com  Sat Jan 20 22:16:40 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: 20 Jan 2007 19:16:40 -0800
Subject: selective logger disable/enable
In-Reply-To: <1169204564.348768.186900@38g2000cwa.googlegroups.com>
References: <1169190498.593059.238150@q2g2000cwa.googlegroups.com>
	<1169204564.348768.186900@38g2000cwa.googlegroups.com>
Message-ID: <1169349399.938121.238430@38g2000cwa.googlegroups.com>


Vinay Sajip wrote:
>
> The documentation for Logger - see
>
> http://docs.python.org/lib/node406.html
>
> - shows that there are addFilter() and removeFilter() methods on the
> Logger class which you can use to add or remove filters from individual
> Logger instances. From the above page (entitled "14.5.1 Logger
> Objects"):
>
> addFilter(filt)
>     Adds the specified filter filt to this logger.
>
> removeFilter(filt)
>     Removes the specified filter filt from this logger.
>
> The parent section of Section 14.5.1, which is Section 14.5, was the
> first search result when I just searched Google for "python logging".


Thanks for the reply Vinay.  I had been reading those docs prior to
posting, but addFilter/removeFilter only work on individual logger
instances and handlers.  I want to globally enable/disable multiple
logger instances, based on their namespaces (see the example I
provided).  I cannot find a way to do this.  I can certainly call
addFilter on every instance of every logger throughout the source code,
but this is more than inconvenient -- it breaks when new modules are
added with their own loggers in their own namespaces (until fixed by
manually adding addFilter() to those instances).

e.g., suppose you have a source tree with a several components that do
network access, and several components that do other things like saving
state to disk, accessing the filesystem, etc.  And suppose you find a
bug that you think is in the networking code.  It would be nice to be
able to GLOBALLY enable just the loggers that belong in the networking
namespace, and disable all others (similar to how Filters are supposed
to work for individual loggers).  And then to be able to do this with
any component, by providing, for example, a command line switch or
environment variable.  Otherwise, the poor programmer is forced to go
and edit every module in the source tree to selectively turn on/off
their respecitve loggers.  Or am I missing something really obvious
about how this is done with the logging module?

thanks,
Gary



From hg at nospam.org  Mon Jan 15 08:18:20 2007
From: hg at nospam.org (hg)
Date: Mon, 15 Jan 2007 14:18:20 +0100
Subject: check if there is data in stdin without blocking
References: <4PMqh.47441$X97.9536@newsfe18.lga>
	<uhNqh.47996$X97.358@newsfe18.lga>
	<eog8hb$ke4$1@upsn250.cri.u-psud.fr>
	<9uNqh.48239$X97.14123@newsfe18.lga>
	<mailman.2737.1168886670.32031.python-list@python.org>
Message-ID: <ekRqh.191458$gl2.146790@newsfe16.lga>

Gabriel Genellina wrote:

> At Monday 15/1/2007 05:55, hg wrote:
> 
>>Well I'm testing under Linux but need support under Windows ... is there
>>any way to poll stdin somehow under both plateform ?
> 
> I think you may want this portable getch function:
> <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/134892>
> 
> 
> --
> Gabriel Genellina
> Softlab SRL
> 
> 
> 
> 
> 
> 
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya!
> http://www.yahoo.com.ar/respuestas

will take a look, thanks.

hg



From goodepic at gmail.com  Fri Jan  5 16:29:07 2007
From: goodepic at gmail.com (goodepic)
Date: 5 Jan 2007 13:29:07 -0800
Subject: PyGreSQL Install
In-Reply-To: <mailman.2353.1168031791.32031.python-list@python.org>
References: <1168030553.913612.309020@q40g2000cwq.googlegroups.com>
	<mailman.2353.1168031791.32031.python-list@python.org>
Message-ID: <1168032547.281390.272960@51g2000cwl.googlegroups.com>

Awesome!  I forgot that when I did switched to root I lost my PATH,
where I'd put usr/local/bin ahead of /usr/bin, so "python" went to 2.5
instead of 2.3.  Using python2.5 worked perfectly.  Thanks!!



From jamesthiele.usenet at gmail.com  Thu Jan 11 11:41:52 2007
From: jamesthiele.usenet at gmail.com (James Thiele)
Date: 11 Jan 2007 08:41:52 -0800
Subject: Progress count in terminal (Mac OS X)
In-Reply-To: <mailman.2579.1168527876.32031.python-list@python.org>
References: <9079A3B8-47A8-495A-BFAE-09A603CFB819@mac.com>
	<eo5h6f$lsu$1@sea.gmane.org>
	<mailman.2579.1168527876.32031.python-list@python.org>
Message-ID: <1168533712.512068.259310@o58g2000hsb.googlegroups.com>

if you invoke python with the -u option the output of print is
unbuffered.

On Jan 11, 7:04 am, Tommy Grav <t... at mac.com> wrote:
> This certainly does work when running the interpreter interactively,
> but when inserted into a script it seems to buffer the print statement
> and not write it out to the terminal. How can I force the print
> statement
> to not buffer the output?
>
> Cheers
>     Tommy
>
> On Jan 11, 2007, at 9:22 AM, Fredrik Lundh wrote:
>
> > Tommy Grav <t... at mac.com>:
>
> >> I have a program that does a lot of iterations and would like
> >> to follow its progress by having it print out the current iteration
> >> number as it progresses. How do I do this so that it appears
> >> like a counter that increases in the same place in the terminal
> >> window? I am using python2.5 on a Mac OSX and its terminal
> >> tcsh window.
>
> > print a carriage return before, and no line feed after, each line:
>
> >     for i in range(100):
> >         print "\r" + "count", i,
> >     print # done
>
> > </F>
> 
> > --
> >http://mail.python.org/mailman/listinfo/python-list



From jmfbahciv at aol.com  Thu Jan 11 08:53:35 2007
From: jmfbahciv at aol.com (jmfbahciv at aol.com)
Date: Thu, 11 Jan 07 13:53:35 GMT
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
	<N6Uoh.43209$wc5.29633@newssvr25.news.prodigy.net>
	<eo2t6h$8qk_014@s808.apx1.sbo.ma.dialup.rcn.com>
	<0001HW.C1CA63B1059BC980F0203648@news.verizon.net>
	<eo33rr$8ss_008@s1005.apx1.sbo.ma.dialup.rcn.com>
	<MPG.200f26e6b5607c46989ef0@news.individual.net>
	<eo3r7102umi@enews1.newsguy.com>
Message-ID: <eo5fgv$8qk_008@s814.apx1.sbo.ma.dialup.rcn.com>

In article <eo3r7102umi at enews1.newsguy.com>, kkkisok at operamail.com wrote:
>
>
>On 10-Jan-2007, krw <krw at att.bizzzz> wrote:
>
>> ...and "HexaPussy" just wouldn't be right.
>
>
>SexagesimalPussy (base 60) has kind of a nice ring to it.

That would cause kiddies to look up the word.  But 360
would have the correct ring.

/BAH


From stefaan.himpe at gmail.com  Sat Jan 13 09:56:47 2007
From: stefaan.himpe at gmail.com (stefaan)
Date: 13 Jan 2007 06:56:47 -0800
Subject: difflib.HtmlDiff
Message-ID: <1168700207.846457.194710@38g2000cwa.googlegroups.com>

Hello List,

I am using difflib.HtmlDiff and it provides great functionality.
Unfortunately it is too slow for my purpose.

Is anyone aware of an alternative ?
- a C-implementation lying around somewhere ?
- perhaps an external tool into which I can pipe my data ?

Intra-line differences are important for my task at hand.

Does it make sense performance-wise to use e.g. GNU diff to generate a
line-by-line diff, then
use SequenceMatcher to find intraline changes?

Google is my friend, but so far it didn't turn up much practical
results :s

Thanks for any insights you may share.
Stefaan.



From grahamd at dscpl.com.au  Sat Jan 13 21:10:37 2007
From: grahamd at dscpl.com.au (Graham Dumpleton)
Date: 13 Jan 2007 18:10:37 -0800
Subject: mod_python and Content-Type
References: <8764bbb6jt.fsf@rudin.co.uk>
Message-ID: <1168740637.544535.113490@38g2000cwa.googlegroups.com>


Paul Rudin wrote:
> I'm have a little experiment with mod_python. I'm trying to figure out
> how to get hold of the original Content-Type header.
>
> In my config file I have:
>
> <Directory /var/www/test/atom>
>       AddHandler mod_python .py
>       PythonHandler atomserv
>       PythonDebug On
> 	    PythonAutoReload On
> </Directory>
>
> The file atomserv.py in that directory has a function called handler
> that gets called as I expect, but on entry to that function
> req.content_type is "text/x-python" whereas my test client sent a
> different Content-Type header.
>
> So, how can I either persuade the apache/mod_python machinery to
> preserve the original content_type, or else how can I get hold of it?

All headers which come from the client are available through the
'headers_in'
attribute of the request object. Eg.

  def handler(req):
    ct = req.headers_in.get('Content-Type')
    ...

The 'content_type' attribute is set by Apache based on its
determination of
what the content type of the response will be based on looking at the
extension type used on the matched resource specified by the URL.

Graham



From nagle at animats.com  Wed Jan 24 14:59:51 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 24 Jan 2007 19:59:51 GMT
Subject: Python does not play well with others
In-Reply-To: <mailman.3096.1169659857.32031.python-list@python.org>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>	<xqxirex3psq.fsf@cola3.ca.boeing.com>	<suMth.75341$wP1.17392@newssvr14.news.prodigy.net>
	<mailman.3096.1169659857.32031.python-list@python.org>
Message-ID: <XUOth.37107$Gr2.33940@newssvr21.news.prodigy.net>

Chris Mellon wrote:
> On 1/24/07, John Nagle <nagle at animats.com> wrote:
> 
>> Harry George wrote:
>> > John Nagle <nagle at animats.com> writes:

> Just to be clear: The problem here is "my personal itch is not being
> scratched by other people for me", not "Python doesn't play well with
> others". You are not any more important than anyone else and assuming
> that anyone cares about your problems is a major fallacy. You have a
> specific library that doesn't meet your needs, and that you are not
> interested in maintaining yourself, so you are attempting to leverage
> some sort of community guilt trip to get other people to do it for
> you. That's dishonest and off-putting.

    No, the problem is that these things are broken.

    Python is the only major open source project I've encountered where
there's so much hostility to bug reports.

    For a while, I tried submitting long, detailed bug reports showing
where in the C code a problem lies, and pointing out ways to fix it.
But I don't want to take over maintenance on the SSL package;
it's too delicate.

				John Nagle


From pierre at saiph.com  Wed Jan 31 05:02:04 2007
From: pierre at saiph.com (Imbaud Pierre)
Date: Wed, 31 Jan 2007 11:02:04 +0100
Subject: data design
In-Reply-To: <epop2g$b2d$1@zinnia.noc.ucla.edu>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
	<1170183985.871094.155720@q2g2000cwa.googlegroups.com>
	<45bfbcc3$0$30950$426a74cc@news.free.fr>
	<1170201274.580256.182740@v45g2000cwv.googlegroups.com>
	<epop2g$b2d$1@zinnia.noc.ucla.edu>
Message-ID: <45c0691c$0$6724$426a74cc@news.free.fr>

James Stroud a ?crit :
> Szabolcs Nagy wrote:
> 
>>> Hurray for yaml! A perfect fit for my need! And a swell tool!
>>> Thanks a lot!
>>
>>
>>
>> i warn you against yaml
I feel both thanful, and sorry, for your warning. And not convinced
yet, but Ill be cautious.
>> it looks nice, but the underlying format is imho too complex (just 
>> look at their spec.)
complex indeed, but real powerful.
Is it not true that: if I used yaml, sticking to what .ini allows,
yaml files would be simple?
>>
>> you said you don't want python source because that's too complex for 
>> the users.
>> i must say that yaml is not easier to use than python data structures.

Easier to read and write, U must agree.
Surround strings with quotes is a python requirement, to distinguish
them from identifiers. This only makes data input for python somewhat
clumsy.
Granted, its a new format to learn. But sharing this format with a
much wider community than python, aint this worth the effort?
(well, if yaml succeeds and spreads...)
>>
>> if you want userfriedly config files then ConfigParser is the way to go.
Granted. for END users. I rather target administrators, programmers,
integrators: make customization an easy process, and allowing this
customization to go much farther than changing simple values, aint
this the REAL challenge for new applications?
>>
>> if you want somthing really simple and fast then i'd recommend s-
>> expressions of lisp
lisp is more powerful than python. its syntax deterred many
programmers, who adopted python, it will deter my targeted
"customizers". And the process to translate to python structure, I
have no idea. involves a python or lisp translater...
>>
>> also here is an identation based xml-like tree/hierarchical data 
>> structure syntax:
>> http://www.scottsweeney.com/projects/slip/
Pretty nice, too! James, have a look at this!
>>
> 
> I've been spending the last 2 days weighing ConfigParser and yaml, with 
> much thought and re-organizing of each file type. The underlying 
> difference is that, conceptually, ini files are an absurdly limited 
> subset of yaml in that ini files are basically limited to a map of a map.
U have a point here.
> 
> For instance, I have a copy_files section of a configuration. In order 
> to know what goes with what you have to resort to gymnastics with the 
> option names
> 
> [copy_files]
> files_dir1 = this.file that.file
> path_dir1 = /some/path
> 
> files_dir2 = the_other.file yet_another.file
> path_dir2 = /some/other/path
> 
> In yaml, it might look thus.
> 
> copy_files :
>      - files : [this.file, that.file]
>        path  : /some/path
>      - files : [the_other.file, yet_another.file]
>        path  : /some/other/path
> 
> Both are readable (though I like equals signs in appearance over 
> colons), but yaml doesn't require a lot of string processing to group 
> the files with the paths. I don't even want to think the coding 
> gymnastics required to split all of the option names and then group 
> those with common suffixes.
> 
> Now if the config file were for copying only, ini would be okay, because 
> one could just have sections that group paths and dirs:
> 
> [dir1]
> files = this.file, that.file
> path = /some/path
> 
> [dir2]
> ...
> 
> But if you need different kinds of sections, you have outgrown ini.
> 
> In essence, ini is limited to a single dictionary of dictionaries while 
> yama can express pretty much arbitrary complexity.
James, this single formula makes things real clear.
As we both work on the subject, maybe we could continue to exchange
ideas, and information?
Have a look at the link Szabolcs Nagy <nszabolcs at gmail.com> gives:
http://www.scottsweeney.com/projects/slip/
Ill further dig yaml, with 2 questions:
- how do I translate to python?
- how do I express and/or enforce rules the data should follow?
   (avoid the classic: configuration data error raise some obscure
   exception).

Big thanks to Szabolcs Nagy (hungarian, my friend? I love this
country), although I seem to disagree, your statements are pretty
clear and helpful, and... maybe U are right, and I am a fool...
Pierre


From gagsl-py at yahoo.com.ar  Mon Jan 29 23:54:43 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 01:54:43 -0300
Subject: Random passwords generation (Python vs Perl) =)
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
Message-ID: <op.tmwg251osd1mbx@gabriel2.softlabbsas.com.ar>

En Mon, 29 Jan 2007 01:58:39 -0300, NoName <zaz600 at gmail.com> escribi?:

> Perl:
> @char=("A".."Z","a".."z",0..9);
> do{print join("", at char[map{rand @char}(1..8)])}while(<>);
>
> !!generate passwords untill U press ctrl-z
>
>
>
> Python (from CookBook):
>
> from random import choice
> import string
> print ''.join([choice(string.letters+string.digits) for i in
> range(1,8)])
>
> !!generate password once :(
>
> who can write this smaller or without 'import'?
>

Isn't it small enough? What's the point on being shorter?
I think you could avoid importing string (building the set of characters  
like the Perl code) but anyway you will end importing random, or os.urandom
Do you want more than one password? Wrap the print inside a while True:  
statement.
-- 
Gabriel Genellina



From nemesis at nowhere.invalid  Fri Jan 12 15:01:36 2007
From: nemesis at nowhere.invalid (Nemesis)
Date: Fri, 12 Jan 2007 20:01:36 GMT
Subject: [ANN] XPN 0.7.0
Message-ID: <20070112200136.6022.19611.XPN@ip-208-67-219-41.n.opendns.com>

XPN (X Python Newsreader) is a multi-platform newsreader with Unicode
support. It is written with Python+GTK. It has features like
scoring/actions, X-Face and Face decoding, muting of quoted text,
newsrc import/export, find article and search in the body, spoiler
char/rot13, random taglines and configurable attribution lines.

You can find it on:

http://xpn.altervista.org/index-en.html

or

http://sf.net/projects/xpn


Changes in this release:

    * v0.7.0: added basic multiserver support. 
              This change has required some modifications to the groups db 
              format, in order to keep your subscriptions you need to export 
              to a newsrc file from XPN-0.6.5 and reimport it in XPN-0.7.0.
    * v0.7.0: now is possible to use Function keys for customized keybindings	
    * v0.7.0: modified the command used to test the connection in order to
              prevent hamster hang-ups.
    * v0.7.0: fixed a bug that caused XPN to crash trying to export newsrc
              file with empty groups subscribed.
    * v0.7.0: fixed a bug in "Apply Scoring and Actions Rules" feature that 
              caused XPN crashes trying to apply !kill rule.
    * v0.7.0: some minor fixes.

XPN is translated in Italian French and German, if you'd like to translate it
in your language and you are familiar with gettext and po-files
editing please contact me (xpn at altervista.org).

-- 
I may not have gone where I intended to go, but I think I have ended up
where I needed to be.

 |\ |       |HomePage   : http://nem01.altervista.org
 | \|emesis |XPN (my nr): http://xpn.altervista.org




From dotancohen at gmail.com  Wed Jan  3 15:47:26 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Wed, 3 Jan 2007 22:47:26 +0200
Subject: Unsubscribing from the list
In-Reply-To: <enh4g4$n0h$1@sea.gmane.org>
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>
	<ene064$bm5$1@sea.gmane.org>
	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>
	<enghj3$qhf$1@sea.gmane.org>
	<880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com>
	<engs22$6u3$1@sea.gmane.org>
	<880dece00701031033o151cbe76h92a5a5adde51db90@mail.gmail.com>
	<enh4g4$n0h$1@sea.gmane.org>
Message-ID: <880dece00701031247l3d2354a3le318340653969de8@mail.gmail.com>

On 03/01/07, Robert Kern <robert.kern at gmail.com> wrote:
> He misunderstood you (as I nearly did, too). The way you phrased "decided that
> there was no futher interest on the page for me" is somewhat ambiguous: it can
> seem like it refers to the second time, not the first.
>

Ah. Sorry. I'm getting better at confusing people :)

if ($you=="got_offended") {
    $dotan="sorry";
}

Dotan Cohen

http://what-is-what.com/what_is/website.html
http://lyricslist.com/


From gagsl-py at yahoo.com.ar  Fri Jan 12 00:16:35 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 12 Jan 2007 02:16:35 -0300
Subject: Explanation about for loop
In-Reply-To: <1168577299.485773.8160@q2g2000cwa.googlegroups.com>
References: <1168577299.485773.8160@q2g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070112021537.0596f950@yahoo.com.ar>

At Friday 12/1/2007 01:48, raghu wrote:

>can any one help me explaining for loop and its execution and its
>syntax with a simple example.

This section of Dive Into Python explain for loops:
http://diveintopython.org/file_handling/for_loops.html
(And you could read the whole book too)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From webraviteja at gmail.com  Mon Jan  8 19:15:39 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 8 Jan 2007 16:15:39 -0800
Subject: Network failure when using urllib2
In-Reply-To: <1168292352.349983.139260@i15g2000cwa.googlegroups.com>
References: <1168292352.349983.139260@i15g2000cwa.googlegroups.com>
Message-ID: <1168301738.984509.3030@38g2000cwa.googlegroups.com>


jdvolz at gmail.com wrote:
> I have a script that uses urllib2 to repeatedly lookup web pages (in a
> spider sort of way).  It appears to function normally, but if it runs
> too long I start to get 404 responses.  If I try to use the internet
> through any other programs (Outlook, FireFox, etc.) it will also fail.
> If I stop the script, the internet returns.
>
> Has anyone observed this behavior before?  I am relatively new to
> Python and would appreciate any suggestions.
>
> Shuad

I am assuming that you are fetching the full page every little while.
You are not supposed to do that. The admin of the web site you are
constantly hitting probably configured his server to block you
temporarily when that happens. But don't feel bad :-). This is a common
Beginners mistake.

Read here on the proper way to do this.
http://diveintopython.org/http_web_services/review.html
especially 11.3.3. Last-Modified/If-Modified-Since in the next page

Ravi Teja.



From gagsl-py at yahoo.com.ar  Sat Jan 13 23:07:00 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 14 Jan 2007 01:07:00 -0300
Subject: Decorators inside of class and decorator parameters
References: <1168728983.541526.202320@l53g2000cwa.googlegroups.com>
Message-ID: <eoca93$m0d$1@sea.gmane.org>

"MR" <ptwobrussell at gmail.com> escribi? en el mensaje 
news:1168728983.541526.202320 at l53g2000cwa.googlegroups.com...

> I have a question about decorators, and I think an illustration would
> be helpful. Consider the following simple class:
>
> #begin code
> class Foo:
>    def fooDecorator(f):
>        print "fooDecorator"
>
>        def _f(self, *args, **kw):
>            return f(self, *args, **kw)
>
>        return _f
>
>    @fooDecorator
>    def fooMethod(self):
>        print "fooMethod"
>
> f = Foo()
> f.fooMethod()
> #end of code
>
> This code runs, and actually serves my purpose. However, I'm a little
> confused about three things and wanted to try and work through them
> while I had the time to do so. I believe all of my confusion is related
> to the parameters related to the fooDecorator:

[I reordered your questions to make the answer a bit more clear]

> -why does this code even work, because the first argument to
> fooDecorator isn't self

fooDecorator is called when the class is *defined*, not when it's 
instantiated. `self` has no meaning inside it, neither the class to which it 
belongs (Foo does not even exist yet).
At this time, fooDecorator is just a simple function, being collected inside 
a namespace in order to construct the Foo class at the end. So, you get 
*exactly* the same effect if you move fooDecorator outside the class.

> -how I would pass arguments into the fooDecorator if I wanted to (my
> various attempts have failed)

Once you move fooDecorator outside the class, and forget about `self` and 
such irrelevant stuff, it's just a decorator with arguments.
If you want to use something like this:
   @fooDecorator(3)
   def fooMethod(self):
that is translated to:
   fooMethod = fooDecorator(3)(fooMethod)
That is, fooDecorator will be called with one argument, and the result must 
be a normal decorator - a function accepting a function an an argument and 
returning another function.

def outerDecorator(param):
  def fooDecorator(f):
    print "fooDecorator"

    def _f(self, *args, **kw):
        print "decorated self=%s args=%s kw=%s param=%s" % (self, args, kw, 
param)
        kw['newparam']=param
        return f(self, *args, **kw)

    return _f
  return fooDecorator

This is the most direct way of doing this without any help from other 
modules - see this article by M. Simoniato 
http://www.phyast.pitt.edu/~micheles/python/documentation.html for a better 
way using its decorator factory.

> -what the difference is between decorating with @fooDecorator versus
> @fooDecorator()
Easy: the second way doesn't work :)
(I hope reading the previous item you can answer this yourself)

> I'm searched the net and read the PEPs that seemed relevant, but I
> didn't see much about decorators inside of a class like this. Can
> anyone comment on any of these three things?
As said in the beginning, there is no use for decorators as methods (perhaps 
someone can find a use case?)
If you move the example above inside the class, you get exactly the same 
results.

HTH,

-- 
Gabriel Genellina 





From bg_ie at yahoo.com  Thu Jan  4 11:20:18 2007
From: bg_ie at yahoo.com (bg_ie at yahoo.com)
Date: 4 Jan 2007 08:20:18 -0800
Subject: Python Wrapper for C# Com Object
In-Reply-To: <mailman.2212.1167757200.32031.python-list@python.org>
References: <1167297178.937748.91790@79g2000cws.googlegroups.com>
	<1167313715.296081.133170@n51g2000cwc.googlegroups.com>
	<mailman.2212.1167757200.32031.python-list@python.org>
Message-ID: <1167927618.573305.324360@v33g2000cwv.googlegroups.com>


Thomas Heller skrev:

> bg_ie at yahoo.com schrieb:
> > bg_ie at yahoo.com skrev:
> >
> >> Hi,
> >>
> >> I wish to write a Python wrapper for my C# COM object but am unsure
> >> where to start. I have a dll and a tlb file, and I can use this object
> >> in C via the following code -
> >>
> >> // ConsolApp.cpp : Defines the entry point for the console application.
> >> //
> >> #include "stdafx.h"
> >> #include "windows.h"
> >> #include "stdio.h"
> >> #import "C:\Documents and Settings\X\Mina dokument\Visual Studio
> >> 2005\Projects\X_COMObject\X_COMObject\bin\Debug\X_COMObject.tlb"
> >> using namespace X_COMObject;
> >>
> >> int _tmain(int argc, _TCHAR* argv[])
> >> {
> >> 	CoInitialize(NULL);
> >>
> >> 	X_COMObject::XCOM_InterfacePtr p(__uuidof(X_COMObject::XCOM_Class));
> >> 	XCOM_Interface *X_com_ptr ;
> >> 	X_com_ptr = p ;
> >> 	X_com_ptr->SetID(10);
> >> 	int x = X_com_ptr->GetID();
> >> 	printf("%d",x);
> >> 	getchar();
> >>
> >> 	return 0;
> >> }
> >>
> >> Can anyone offer me some tips as to how to do this in Python?
> >>
> >> Thanks very much for your help,
> >>
> >> Barry.
> >
> > This is what I've done so far, but I know I'm not doing this correctly.
> > Can anyone help me out?
> >
> > #import pythoncom
> > #pythoncom.CoInitialize()
>
> The above is unneeded if you use comtypes as below (and is unneeded
> when using pythoncom, as well).
>
> > from comtypes.client import GetModule, CreateObject
> >
> > module = GetModule("C:\\Documents and Settings\\X\\Mina
> > dokument\\Visual Studio
> > 2005\\Projects\\X_COMObject\\X_COMObject\\bin\\Debug\\X_COMObject.tlb")
> >
> You don't intantiate the interface, you have to instantiate the COM object.
> Something like
>
>   CreateObject("XCOM_Class")
>
> but of course you have to use the correct argument in the call - the progid
> of the COM object.
> Alternatively you can use the CoClass from the typelibrary, look into the
> generated module in the comtypes\gen directory for a class derived from
> comtypes.CoClass.
>
> InternetExplorer, for example, can be started in these ways:
>
> # using the progid:
> ie = CreateObject("InternetExplorer.Application")
>
> # using the clsid:
> ie = CreateObject("{0002DF01-0000-0000-C000-000000000046}")
>
>
> # using the coclass from the generated module:
> mod = GetModule("shdocvw.dll")
> ie = CreateObject(mod.InternetExplorer)
>
> Thomas

Thanks very much for your help.

I tried running the following code -

import win32com.client
scanObj = win32com.client.Dispatch("X_COMObject")

but im getting the following error -

Traceback (most recent call last):
  File
"C:\Python22\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "C:\Python25\test.py", line 20, in ?
    scanObj = win32com.client.Dispatch("Scania_COMObject")
  File "C:\Python22\Lib\site-packages\win32com\client\__init__.py",
line 95, in Dispatch
    dispatch, userName =
dynamic._GetGoodDispatchAndUserName(dispatch,userName,clsctx)
  File "C:\Python22\Lib\site-packages\win32com\client\dynamic.py", line
98, in _GetGoodDispatchAndUserName
    return (_GetGoodDispatch(IDispatch, clsctx), userName)
  File "C:\Python22\Lib\site-packages\win32com\client\dynamic.py", line
78, in _GetGoodDispatch
    IDispatch = pythoncom.CoCreateInstance(IDispatch, None, clsctx,
pythoncom.IID_IDispatch)
com_error: (-2147221005, 'Invalid Class String', None, None)

I ran my C++ code again and it works fine. I also checked COM Browser
and my X_COMObject is present and I'm spelling it right.

Any ideas what the problem migth be?

Thanks again,

Barry.



From gagsl-py at yahoo.com.ar  Thu Jan  4 22:30:08 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 05 Jan 2007 00:30:08 -0300
Subject: subclassing a module: misleading(?) error message
In-Reply-To: <459d687a$1@nntp.zianet.com>
References: <459d687a$1@nntp.zianet.com>
Message-ID: <7.0.1.0.0.20070105002648.05b86e88@yahoo.com.ar>

At Thursday 4/1/2007 17:49, Erik Johnson wrote:

>Python 2.3.4 (#1, Feb  7 2005, 15:50:45)
>Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "Sub.py", line 4, in ?
>     class Sub(Super):
>TypeError: function takes at most 2 arguments (3 given)
>
>Why does python complain about a function here? (it's a class definition
>statement, right?)
>Is there really a function being called here?
>If so:
>     What function was called?
>     What two arguments is it expecting?
>     What three were given?

The same thing on Python 2.4.2 (at least) prints a much more meaningful error:

Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: Error when calling the metaclass bases
     module.__init__() takes at most 2 arguments (3 given)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From Michael.Coll-Barth at VerizonWireless.com  Fri Jan 19 16:08:57 2007
From: Michael.Coll-Barth at VerizonWireless.com (Michael.Coll-Barth at VerizonWireless.com)
Date: Fri, 19 Jan 2007 16:08:57 -0500
Subject: OT Annoying Habits (Was: when format strings attack)
In-Reply-To: <NYOBGCEXSMTP21R1PDG000b0f9b@nyobgcexsmtp21.uswin.ad.vzwcorp.com>
Message-ID: <20070119214644.7709A1E4004@bag.python.org>


::CLAP CLAP::

thank you!

I have been in the newsgroups for over 12 years and I never cared about the top/bottom post silliness.  All I care about is that the message is clearly written.  Everything else is doggerel.

> -----Original Message-----
> From: Carroll, Barry
> 
> Personally, I don't think top-posting is the most annoying newsgroup
> habit.  I think it's making a big fuss about minor inconveniences.  

::CLAP CLAP::

thank you!

I have been in the newsgroups for over 12 years and I never cared about the top/bottom post silliness.  All I care about is that the message is clearly written.  Everything else is doggerel.


The information contained in this message and any attachment may be
proprietary, confidential, and privileged or subject to the work
product doctrine and thus protected from disclosure.  If the reader
of this message is not the intended recipient, or an employee or
agent responsible for delivering this message to the intended
recipient, you are hereby notified that any dissemination,
distribution or copying of this communication is strictly prohibited.
If you have received this communication in error, please notify me
immediately by replying to this message and deleting it and all
copies and backups thereof.  Thank you.



From parallelpython at gmail.com  Thu Jan 11 19:29:40 2007
From: parallelpython at gmail.com (parallelpython at gmail.com)
Date: 11 Jan 2007 16:29:40 -0800
Subject: Parallel Python
In-Reply-To: <eo5gtj$6bs$1@news.albasani.net>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<7x8xga215f.fsf@ruckus.brouhaha.com>
	<eo3bjj$cen$1@gemini.csx.cam.ac.uk>
	<eo52h9$kad$1@news.albasani.net>
	<1168516936.890690.235300@p59g2000hsd.googlegroups.com>
	<eo5gtj$6bs$1@news.albasani.net>
Message-ID: <1168561780.317156.268880@42g2000cwt.googlegroups.com>

>
> Thus there are different levels of parallelization:
>
> 1 file/database based; multiple batch jobs
> 2 Message Passing, IPC, RPC, ...
> 3 Object Sharing
> 4 Sharing of global data space (Threads)
> 5 Local parallelism / Vector computing, MMX, 3DNow,...
>
> There are good reasons for all of these levels.
> Yet "parallel python" to me fakes to be on level 3 or 4 (or even 5 :-) ), while its just a level 2
> system, where "passing", "remote", "inter-process" ... are the right vocables.
In one of the previous posts I've mentioned that ppsmp is based on
processes + IPC, which makes it a system with level 2 parallelization,
the same level where MPI is.
Also it's obvious from the fact that it's written completely in python,
as python objects cannot be shared due to GIL (POSH can do sharing
because it's an extension written in C).



From sargis at ieee.org  Fri Jan 19 15:42:29 2007
From: sargis at ieee.org (sargis at ieee.org)
Date: 19 Jan 2007 12:42:29 -0800
Subject: ANN: Python Molecular Viewer - 1.4.4
Message-ID: <1169239349.282715.13340@51g2000cwl.googlegroups.com>

We are pleased to announce the release of version 1.4.4 of our software
tools including: Python Molecular Viewer (PMV), AutoDockTools (ADT) and
VISION a visual-programming environment.

Installers for binary distributions are available for LINUX, Mac OS X
and Windows at:
http://mgltools.scripps.edu/downloads

The binary distributions contain:
 - a precompiled Python interpreter version 2.4; (except for windows
which requires
   running the Python installer first)
 - PMV, ADT, VISION and all dependent Python packages.

INSTALLERS:
 -  PackageMaker-based installer - Mac OS X  (.dmg extension);
 -  InstallJammer-based installers - Linux and Windows.
    Note: the windows installer has to be run after Python 2.4 has been
installed.

LICENSE AGREEMENTS:
--------------------------------------
 The license agreements are provided on the download site at
https://mgltools.scripps.edu/downloads/license-agreements
and can also be found in the LICENSE file of the distribution.

NEW FEATURES:
--------------------------
ADT:

 autoanalyzeCommands
  -added new ADanalyze_showBindingSite command as
   Analyze->Dockings->Visualize Docking in context
   This display uses (1)spheres centered on atoms in
closer-than-vdw-radii contact
   (2)hydrogen bonds and (3)sections of secondary structure
   (for sequences of 5 or more adjacent residues in the receptor with
atoms close to the
   ligand) to show the bound ligand in the context of surrounding
receptor.
 autoflexCommands
  -add explicit warning to caution users that the molecule used to
   calculate autogrids for AD4 should contain only the non-moving or
'rigid' residues.
 ConfPlayer
  -added support for updating the 'BindingSite' display
  -added support for showing information about singleton clusters
  -added PopulationPlayer class
 DlgParser:
  -added support for parsing the amount of time involved in the
calculation
  -added support for parsing populations which are written when outlev
is set
   to 4 in the AD4 dpf.
 DockingParameters:
  -added support for reorient keyword (AD4)
  -added dpf_written_filename attribute
 GridParameters:
  -added gpf_written_filename attribute

 Added Web Services commands accessible from Run->Web Services.
 Registered users can now run AutoGrid and AutoDock installed on NBCR
cluster.

 atomTypeTools
  -fixed problem which sometimes occurred in merging nphs.  Previously
   hydrogens not bonded to anything raised an exception. Now the code
checks for
   the existence of bonds before referencing hydrogens' bonds... NB:
now
   non-bonded hydrogens will not raise an error.

 Utilities24:
 prepare_receptor4
  -corrected initialization of 'cleanup' on line 70 to match
documentation
   string
  -improved support for preserving the input atom charge on a
   specified type to AD4ReceptorPreparation
  -fixed bug where 'charges_to_add' was not initialized in some
cases...
 summarize_docking_directory.py
  -new script which reads in all the docking logs in a directory into a
   single Docking. It clusters the results and outputs a
comma-separated
   list showing number of conformations, number of tors, number of
atoms,
   number of clusters, rmstol used for clustering, energy, etc. By
default
   uses c2-specific getRMSD_custom method (line 176) which should be
   commented out if not appropriate.
 summarize_time.py
  -new script which reads in all the docking logs in a directory and
outputs
   the total amount of time taken.

 PMV:

 - New dashboard widget showing a tree representation of molecules and
allowing to
     rapidly execute PMV commands on molecular fragments
 - New Grid3D commands for rendering 3D Grids. Supports adding and
removing grids to Pmv.
   Grid a show in a table widget used for navigating between grids.
Isocontours and
   orthogonal slices can be computed and displayed.
 - New Update command under the Help menu allows the user to update Pmv
with the latest
   version of the tools.
 - New Register button in the About dialog allows a user to register
anytime
 - New BugReport Command to helpCommands. This command is for
submitting bugs to
   Bugzila DataBase from Pmv.
 - New command for reading and playing GROMACS trajectory files(.trr ,
.xtc formats)
 - A new check button in the GUI of the display Sticks and balls
command enable
   licorice representation
 - A new cartoon outlines rendering mode is available and can be turned
on through
   a button on the button bar.
 - New 3D labels allow for more fonts, arbitrary sizes, and optional
billboarding
 - Setting the sphere quality to 0 in display CPK or Sticks And Balls
no adapts the
   sphere quality based on the number of displayed atoms.

 Vision:
 - New node library for MatPlotLib
 - Added 2d texture to geometries
 - Network is now self executable when a user panel is defined
 - Visual editing for network user panels
 - "setmatplotlibparams" node in matpltlibNodes for setting rendering
options
   (such as color, grid, size etc) for axes, figures etc.
 - Added rendering options for Histogram, Plot, Scatter, FigImage
nodes.

 DejaVu:
 - Graph Tool for adjusting non photo rendering parameters.
 - Sharp color boundaries for lines, cylinders and surfaces
 - Invert normal per geometry (and it is exportable)
 - 3d lighting is now globally switchable
 - Movables text stickers and 2d images
 - Introduced specialized GUI per geometry

 And many bug fixes across all packages.

SUPPORT:
---------------
 The following mailing lists are available:

 -AutoDock: a community of AutoDock, AutoGrid and AutoDockTools (ADT)
users
 with lots of experience to share
 http://mgldev.scripps.edu/mailman/listinfo/autodock

 -PMV for questions regarding the use of PMV;
 http://mgldev.scripps.edu/mailman/listinfo/pmv

 -Vision for questions regarding the use of VISION;
 http://mgldev.scripps.edu/mailman/listinfo/vision

 -MGLTools support for questions regarding installing the MGLTools.
 http://mgldev.scripps.edu/mailman/listinfo/mglsupport

 Please visit our Frequently Asked Questions page if you have any
problems
 installing or running our tools:
http://mgltools.scripps.edu/documentation/faq


 For other inquiries, send an email to mgltools (mgltools at scripps.edu)

 More information can be found on our web site at
 http://mgltools.scripps.edu

 Thank you for using our tools.


 The MGLTools development team



From jura.grozni at gmail.com  Sun Jan 28 18:44:33 2007
From: jura.grozni at gmail.com (azrael)
Date: 28 Jan 2007 15:44:33 -0800
Subject: Data structure and algorithms
In-Reply-To: <mailman.3249.1170026297.32031.python-list@python.org>
References: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
	<1170025297.838143.191740@j27g2000cwj.googlegroups.com>
	<mailman.3249.1170026297.32031.python-list@python.org>
Message-ID: <1170027873.650783.172500@l53g2000cwa.googlegroups.com>

i'd like to get more control like in c with pointers. I want to loose 
the data after disabling:

>>> list=[]
>>> list.append(Node(1))
>>> list.append(Node(2))
>>> list[0].next=list[1]


      1, 2


>>> list.append(Node(3))
>>> list[1].next=list[2]


1,2,3


>>> list[0].next=list[2]

1,3                       (but 2 still exists as list[2])



as much simmilar as this:


#include<stdio.h>
#include<stdlib.h>
typedef int element;
struct Lis
	{
		int values[10000];
		int cursor;
	};
typedef struct Lis list;

int FirstL(list *Li){
		return(0);
	}

int EndL(list *Li){
		return((*Li).cursor);
	}

element NextL(element p, list *Li){
		if ((p>=(*Li).cursor) || (p<0))
			{
				printf("Element ne postoji u listi ! \n");
				exit(0);
			}
		else
			return(p+1);
}

element PreviousL(element p, list *Li){
		if ((p>(*Li).cursor) || (p<=0))
			{
				printf("Element ne postoji u listi ! \n");
				exit(0);
			}
		else
			return(p-1);
}


element LocateL(int x, list *Li){
		int i;
		i=0;
		while ((i!= (*Li).cursor) && ((*Li).values[i]!=x))
			i++;
		return(i);
}

void InsertL(int x, element p, list *Li){
		int i;
		if ((p<=(*Li).cursor) && (p>=0)  && ((*Li).cursor<10000))
			{
				for (i=(*Li).cursor; i>=p; i--)
					(*Li).values[i]=(*Li).values[i-1];
				(*Li).cursor++;
				(*Li).values[p]=x;
			}
		else
			{
				if((*Li).cursor>=10000)
					printf("Lista je puna");
				else
				printf("Element ne postoji u listi ! \n");
			exit(0);
			}
	}

void DeleteL(element p, list *Li){
		int i;
		if ((p<(*Li).cursor) && (p>=0))
			{
				for (i=p; i<(*Li).cursor; i++)
					(*Li).values[i]=(*Li).values[i+1];
				(*Li).cursor--;
			}
		else
			{
				printf("Element ne postoji u listi ! \n");
				exit(0);
			}
	}


int RetrieveL(element p, list *Li){
		if ((p<(*Li).cursor) && (p>=0))
			return((*Li).values[p]);
		else
			{
				printf("Element ne postoji u listi ! \n");
				exit(0);
			}
	}



void DeleteAllL(list *Li){
		(*Li).cursor=0;
	}


void InitL(list *Li){
		(*Li).cursor=0;
	}




From bj_666 at gmx.net  Tue Jan 30 13:18:18 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 30 Jan 2007 19:18:18 +0100
Subject: Help me understand this
References: <mailman.3318.1170179562.32031.python-list@python.org>
Message-ID: <pan.2007.01.30.18.18.17.234023@gmx.net>

In <mailman.3318.1170179562.32031.python-list at python.org>, Jean-Paul
Calderone wrote:

>>An integer is a primary so 2.__add(1) should be valid.
> 
> A float is, too.  2.__add is a float followed by an identifier.
> Not legal.  As pointed out elsewhere in the thread, (2). forces
> it to be an integer followed by a ".".

A space between the integer literal and the dot operator works too:

In [1]: 2 .__add__(1)
Out[1]: 3

Ciao,
	Marc 'BlackJack' Rintsch


From gert.cuykens at gmail.com  Fri Jan 26 12:25:16 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Fri, 26 Jan 2007 18:25:16 +0100
Subject: instancemethod
In-Reply-To: <45ba2b72$0$3007$426a34cc@news.free.fr>
References: <mailman.2961.1169417800.32031.python-list@python.org>
	<45b51298$0$8289$426a74cc@news.free.fr>
	<ef60af090701221255m575701e7jaae6bd858acbea5c@mail.gmail.com>
	<dea92f560701230608p469d5937ya658e2bb234c4941@mail.gmail.com>
	<mailman.3041.1169586704.32031.python-list@python.org>
	<45ba2b72$0$3007$426a34cc@news.free.fr>
Message-ID: <ef60af090701260925mb40a82gd26f646d527774f@mail.gmail.com>

 > class Obj(object):
>    pass
>
> toto = tutu = tata = titi = Obj()
>
> What's an "instance name" ?
>
> --
> http://mail.python.org/mailman/listinfo/python-list

i would say __object__.__name__[3] == toto

And if your obj is a argument like

something(Obj())

i would say __object__.__name__[0] == 0x2b7bd17e9910


From carroll at tjc.com  Fri Jan 12 19:33:11 2007
From: carroll at tjc.com (Terry Carroll)
Date: Fri, 12 Jan 2007 16:33:11 -0800
Subject: MP3 decoder module?
In-Reply-To: <7x4pqvste8.fsf@ruckus.brouhaha.com>
References: <7x4pqvste8.fsf@ruckus.brouhaha.com>
Message-ID: <eo99c3$rhk$1@blue.rahul.net>

Paul Rubin wrote:
> Anyone know of a reasonable mp3 decoder library I can call from
> Python?  Some Googling didn't find anything too promising.  It found
> Pymedia (which plays mp3's through a sound system)....  But I want to
> actually decode the mp3 frames and crunch on the audio samples.

As I read the Pymedia docs, you can use it to decode frames from an MP3, 
and operate on the decoded sound data.

See http://pymedia.org/tut/dump_wav.html for a discussion.


From grante at visi.com  Fri Jan  5 10:40:56 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 05 Jan 2007 15:40:56 -0000
Subject: program deployment
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
	<12psqtppgi5cme6@corp.supernews.com>
	<1168010377.179056.220500@s80g2000cwa.googlegroups.com>
Message-ID: <12pssc84huen252@corp.supernews.com>

On 2007-01-05, king kikapu <aboudouvas at panafonet.gr> wrote:

>> > Are they embarassed by their code?
>
> hehehe...no, just worried about stealing their ideas...

They're deluding themselves.

The vast majority of ideas aren't worth stealing.

If they are worth stealing, you don't need the source code to
do it.

You can figure out the ideas behind almost all software by
running the program for 30 seconds (or just by reading a
description of what it's supposed to do).  

Even sophisticated and intricate algorithms and protocols can be
reverse-engineered with or without the source code.  Having the
source code often doesn't even help very much.

-- 
Grant Edwards                   grante             Yow!  Join the PLUMBER'S
                                  at               UNION!!
                               visi.com            


From kjanz1899 at gmail.com  Sun Jan 14 00:35:23 2007
From: kjanz1899 at gmail.com (Binky)
Date: 13 Jan 2007 21:35:23 -0800
Subject: Newbie imap lib question
References: <1168611888.009894.271190@51g2000cwl.googlegroups.com>
Message-ID: <1168752923.113252.220730@a75g2000cwd.googlegroups.com>

Section 6.3.1 of the RFC3501 explains the possible data items the
server will return after a SELECT command is issues. You can find
RFC3501 here http://www.isi.edu/in-notes/rfc3501.txt.

Try using the RECENT method to examine the "extra" data items returned
by SELECT. Here's an example

>>> M.response('RECENT')
('RECENT', ['0'])

If all else faile, you may want to examine the imap library code to see
how it parses the SELECT response data.



From bearophileHUGS at lycos.com  Thu Jan 25 04:59:54 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 25 Jan 2007 01:59:54 -0800
Subject: How can i do this in Python?
In-Reply-To: <mailman.3140.1169707796.32031.python-list@python.org>
References: <1169699143.237710.277160@l53g2000cwa.googlegroups.com>
	<mailman.3140.1169707796.32031.python-list@python.org>
Message-ID: <1169719194.084162.148380@v33g2000cwv.googlegroups.com>

Gabriel Genellina:
> import operator,fileinput
> mapper = map(operator.itemgetter, [0,1,20,21,2,10,12,14,11,4,5,6])
> for line in fileinput.input():
>      fields = line.split()
>      print '\t'.join(m(fields) for m in mapper)

I'm just curious, what's the advantage of using itemgetter there
compared to something simpler like this (untested!)?

import fileinput
positions = [0,1,20,21,2,10,12,14,11,4,5,6]
for line in fileinput.input():
    fields = line.split()
    print '\t'.join(fields[m] for m in positions)

Bye,
bearophile



From robert.kern at gmail.com  Tue Jan  9 15:36:47 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 09 Jan 2007 14:36:47 -0600
Subject: Newbie - converting csv files to arrays in NumPy
In-Reply-To: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
Message-ID: <eo0uda$5gn$1@sea.gmane.org>

oyekomova wrote:
> I would like to know how to convert a csv file with a header row into a
> floating point array without the header row.

Use the standard library module csv. Something like the following is a cheap and
cheerful solution:


import csv
import numpy

def float_array_from_csv(filename, skip_header=True):
    f = open(filename)
    try:
        reader = csv.reader(f)
        floats = []
        if skip_header:
            reader.next()
        for row in reader:
            floats.append(map(float, row))
    finally:
        f.close()

    return numpy.array(floats)

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From muralims80 at gmail.com  Tue Jan 30 04:13:25 2007
From: muralims80 at gmail.com (murali iyengar)
Date: Tue, 30 Jan 2007 14:43:25 +0530
Subject: message handling in Python / wxPython
Message-ID: <5fe216230701300113i4422bae8g97021e07361bfc2b@mail.gmail.com>

hi,
i have basic knowledge of python and wxPython... now i need to know about
message handling in python/wxPython?

could anybody pls help me by giving some info on how to handle (in Python),
'the user defined messages' posted from VC++, i dont know how to handle
messaes in python.

Thanks and Regards,
Murali M.S
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070130/afa2a33e/attachment.html>

From horpner at yahoo.com  Sat Jan 13 17:05:53 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 13 Jan 2007 22:05:53 GMT
Subject: Boilerplate in rich comparison methods
References: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>
	<1168674664.792869.213260@m58g2000cwm.googlegroups.com>
	<45a90301$0$7677$4c368faf@roadrunner.com>
	<pan.2007.01.13.19.08.03.19901@REMOVE.THIS.cybersource.com.au>
Message-ID: <5Jcqh.1188$G23.509@newsreading01.news.tds.net>

On 2007-01-13, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Sat, 13 Jan 2007 10:04:17 -0600, Paul McGuire wrote:
> [snip]
>
> Surely this is only worth doing if the comparison is expensive?
> Testing beats intuition, so let's find out...
>
> class Compare:
>     def __init__(self, x):
>         self.x = x
>     def __eq__(self, other):
>         return self.x == other.x
>
> class CompareWithIdentity:
>     def __init__(self, x):
>         self.x = x
>     def __eq__(self, other):
>         return self is other or self.x == other.x
>
> Here's the timing results without the identity test:
>
>>>> import timeit
>>>> x = Compare(1); y = Compare(1)
>>>> timeit.Timer("x = x", "from __main__ import x,y").repeat()
> [0.20771503448486328, 0.16396403312683105, 0.16507196426391602]
>>>> timeit.Timer("x = y", "from __main__ import x,y").repeat()
> [0.20918107032775879, 0.16187810897827148, 0.16351795196533203]
>
> And with the identity test:
>
>>>> x = CompareWithIdentity(1); y = CompareWithIdentity(1)
>>>> timeit.Timer("x = x", "from __main__ import x,y").repeat()
> [0.20761799812316895, 0.16907095909118652, 0.16420602798461914]
>>>> timeit.Timer("x = y", "from __main__ import x,y").repeat()
> [0.2090909481048584, 0.1968839168548584, 0.16479206085205078]
>
> Anyone want to argue that this is a worthwhile optimization? :)

Perhaps. But first test it with "==".

-- 
Neil Cerutti


From gagsl-py at yahoo.com.ar  Mon Jan  8 12:55:57 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 08 Jan 2007 14:55:57 -0300
Subject: popen, Pipes with programs that expect user input
In-Reply-To: <536598837.20070108180654@mail.ru>
References: <536598837.20070108180654@mail.ru>
Message-ID: <7.0.1.0.0.20070108145148.032a5208@yahoo.com.ar>

At Monday 8/1/2007 13:06, Alex wrote:

>So far everything works fine, but I encounter a problem with commands
>which require some sort of user input; i.e. they don't return
>immediately.
>
>Could someone point out the cause of this?  It seems to me that the
>interpreter is stuck at this line
>   data=fouterr.read()
>
>and it won't go forward unless popen returns. If so, how should the
>objective be achieved?

Read the docs on the popen2 module, specially the last section on 
syncronization.
Depending on how bad your child process behaves (the date command in 
this case) you may need to use up to three separate threads for 
processing stdin, stdout, stderr.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From nmm1 at cus.cam.ac.uk  Fri Jan 12 12:15:56 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 12 Jan 2007 17:15:56 GMT
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<eo65qk$bsr$1@sea.gmane.org>
	<cb63d1e10701111420l28d0f0d0s35217370d86067b@mail.gmail.com>
	<mailman.2650.1168618607.32031.python-list@python.org>
Message-ID: <eo8foc$7mh$1@gemini.csx.cam.ac.uk>


In article <mailman.2650.1168618607.32031.python-list at python.org>,
Facundo Batista <facundo at taniquetil.com.ar> writes:
|> Noud Aldenhoven wrote:
|> 
|> > There are a (small) couple of other issues where rational numbers could be
|> > handy. That's because rational numbers are exact, irrational numbers (in
|> > python) aren't. But these issues are probably too mathematical to be used in
|> 
|> For the sake of me being less ignorant, could you please point me a
|> language where irrational numbers are exact?

Some of the algebraic languages.  (2/3)^(1/5) is held as such and
manipulated appropriately.

Yes, I know that's "cheating" :-)


Regards,
Nick Maclaren.


From weekender_ny at yahoo.com  Mon Jan 22 01:48:52 2007
From: weekender_ny at yahoo.com (John)
Date: 21 Jan 2007 22:48:52 -0800
Subject: class explorer for automating IE
Message-ID: <1169448532.869501.190530@v45g2000cwv.googlegroups.com>


I found this class which was written in 2003.

http://xper.org/wiki/seminar/InternetExplorerAutomation

Is there a better/more complete version around that someone knows of.

Thanks,
--j



From sjmachin at lexicon.net  Thu Jan 11 03:11:25 2007
From: sjmachin at lexicon.net (John Machin)
Date: 11 Jan 2007 00:11:25 -0800
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
In-Reply-To: <1168461822.591030.74360@i56g2000hsf.googlegroups.com>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
	<1168461822.591030.74360@i56g2000hsf.googlegroups.com>
Message-ID: <1168503084.828765.196790@77g2000hsv.googlegroups.com>


sturlamolden wrote:
> oyekomova wrote:
> > Thanks for your help. I compared the following code in NumPy with the
> > csvread in Matlab for a very large csv file. Matlab read the file in
> > 577 seconds. On the other hand, this code below kept running for over 2
> > hours. Can this program be made more efficient? FYI - The csv file was
> > a simple 6 column file with a header row and more than a million
> > records.
> >
> >
> > import csv
> > from numpy import array
> > import time
> > t1=time.clock()
> > file_to_read = file('somename.csv','r')
> > read_from = csv.reader(file_to_read)
> > read_from.next()
>
> > datalist = [ map(float, row[:]) for row in read_from ]
>
> I'm willing to bet that this is your problem. Python lists are arrays
> under the hood!
>
> Try something like this instead:
>
>
> # read the whole file in one chunk
> lines = file_to_read.readlines()
> # count the number of columns
> n = 1
> for c in lines[1]:
>    if c == ',': n += 1
> # count the number of rows
> m = len(lines[1:])

Please consider using
    m = len(lines) - 1

> #allocate
> data = empty((m,n),dtype=float)
> # create csv reader, skip header
> reader = csv.reader(lines[1:])

lines[1:] again?
The OP set you an example:
    read_from.next()
so you could use:
    reader = csv.reader(lines)
    _unused = reader.next()

> # read
> for i in arange(0,m):
>    data[i,:] = map(float,reader.next())
>
> And if this is too slow, you may consider vectorizing the last loop:
>
> data = empty((m,n),dtype=float)
> newstr = ",".join(lines[1:])
> flatdata = data.reshape((n*m)) # flatdata is a view of data, not a copy
> reader = csv.reader([newstr])
> flatdata[:] = map(float,reader.next())
> 
> I hope this helps!



From fdelente at mail.cpod.fr  Fri Jan 26 16:50:26 2007
From: fdelente at mail.cpod.fr (Fabrice DELENTE)
Date: 26 Jan 2007 21:50:26 GMT
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
	<45ba50c7$0$31432$426a74cc@news.free.fr>
	<slrnerks72.jc.horpner@FIAD06.norwich.edu>
Message-ID: <45ba77a2$0$26693$426a74cc@news.free.fr>

> What happens when you try this?

> stdscr.addstr(0,0, u"le?on".encode('iso8859-15'))

> I don't really expect it to work

And it doesn't...

As support for 8-bit (and even unicode) is important for my script, is there
any hope? Should I switch to slang instead of curses?

-- 
Fabrice DELENTE


From nmm1 at cus.cam.ac.uk  Tue Jan  9 06:38:09 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 9 Jan 2007 11:38:09 GMT
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
Message-ID: <envur1$rq1$1@gemini.csx.cam.ac.uk>


|> Rory Campbell-Lange wrote:
|> 
|> > Is using the decimal module the best way around this? (I'm
|> > expecting the first sum to match the second). It seem
|> > anachronistic that decimal takes strings as input, though.

As Dan Bishop says, probably not.  The introduction to the decimal
module makes exaggerated claims of accuracy, amounting to propaganda.
It is numerically no better than binary, and has some advantages
and some disadvantages.

|> Also check the recent thread "bizarre floating point output".

No, don't.  That is about another matter entirely, and will merely
confuse you.  I have a course on computer arithmetic, and am just
now writing one on Python numerics, and confused people may contact
me - though I don't guarantee to help.


Regards,
Nick Maclaren.


From Barry.Carroll at psc.com  Wed Jan 17 13:50:20 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Wed, 17 Jan 2007 10:50:20 -0800
Subject: *POLL* How many sheeple believe in the 911 fairy tale and
	willingto accept an Orwellian doublespeak and enslavement world ?
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A7B@eugsrv400.psc.pscnet.com>


> -----Original Message-----
> From: st911 at rock.com [mailto:st911 at rock.com]
> Sent: Wednesday, January 17, 2007 10:23 AM
> To: python-list at python.org
> Subject: Re: *POLL* How many sheeple believe in the 911 fairy tale and
> willingto accept an Orwellian doublespeak and enslavement world ?
> 
> 
> > ... buildings collapse all the time when you design to the
cold-formed
> > strength rather than the hot-formed strength of a material, then
heat
> > the material removing its tempered strength (which for steel occurs
at
> > much lower than usual flame temeratures).
> 
> Actually, modern steel frame buildings have never collapsed from
> kerosine fire.
> Besides there are SERIOUS anomalies indicative of thermate and
> explosives.
> Yellow hot molten metal were seen trickling down less than hour after
> the fires.
> Red hot molten metal pools were seen in the rubble weeks after the
> collapse.
> The building and their contents pulverized to dust from the brisance
of
> very well
> planted and hidden explosives. I was not aware that Alqaeda has
> invisible man
> technology past the security cameras.
> 
> > And what did this rant have to do with any of the sci.* or
programming
> > newsgroups you posted it to?
> 
> Your ignoramus is the exact reason why this has to be posted there.
> 
> > David A. Smith
> 
> And why did bldg 7 commit suicide. How was the boeing767 maneouvered
> so close to the ground into pentagon?
> 
> Where is the DNA to confirm the identities of 19 in the fairy tale?
> 
> Do you work for the story writing agency ?
> 
Ladies and Gentlemen:

PLEASE take this discussion to a more appropriate forum.  There are many

forums where people will be happy to debate this: physics, firefighting,
metallurgy, geopolitics, etc.  This forum is about the Python
programming language.  Let's keep it that way.  

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed




From igouy at yahoo.com  Sat Jan 20 14:34:46 2007
From: igouy at yahoo.com (Isaac Gouy)
Date: 20 Jan 2007 11:34:46 -0800
Subject: Py 2.5 on Language Shootout
In-Reply-To: <mailman.2944.1169309208.32031.python-list@python.org>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>
	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>
	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>
	<1169275613.093797.67320@v45g2000cwv.googlegroups.com>
	<45B23400.2010906@gmx.de>
	<mailman.2944.1169309208.32031.python-list@python.org>
Message-ID: <1169321686.025356.120340@s34g2000cwa.googlegroups.com>


Ramon Diaz-Uriarte wrote:
> On 1/20/07, Carl Friedrich Bolz <cfbolz at gmx.de> wrote:
> > pgarrone at acay.com.au wrote:
> >  >>> Looking over the benchmarks, one gains the impression that Python is a
> >  >>> slow language.
> >  >> What does that even mean - a slow language?
> >  >>
> >  >
> >  > The alioth benchmarks provide a set of numbers by which
> >  > languages may be compared.
> >
> > Wrong. The benchmarks provide a set of numbers by which
> > _implementations_ of languages can be compared. After all, it is
> > possible that someone implements a magic-pixie-dust-interpreter that
> > executes Python programs several orders of magnitude fastes than
> > CPython. Or you could say that C is slow because if you use CINT, a C
> > interpreter ( http://root.cern.ch/root/Cint.html ) to execute it, it is
> > slow.
>
>
> Yeah, but this is hair-splitting. Except for Jython, IronPython, and
> Stackless, I think when we say "Python is slow/fast" we think CPython
> (otherwise, we qualify the implementation). For that matter it is
> often said "the GIL ..."; oh, but wait, Stackless ...

When we say "Python is slow/fast" what does "slow/fast" mean?


>
> With other languages (e.g., Common Lisp) the separation between the
> language and the implementation is key because, to begin with, there
> is something external from, and independent of, any particular
> implementation. That is not the case with Python.
>
> And the example of CINT is hair-splitting to the nth power.To begin
> with, I do not think CINT implements the full standard C. But even if
> it were, when people think of C they rarely think of CINT.

And that's why the existence of CINT is such a stark reminder of the
separation between the language and the implementation. When people
think of C what do they think of - gcc? tiny-c? intel c? microsoft c?
some mythical C implementation?


>
> I think readers understood the previous poster.
>
> Best,
>
> R.
> >
> > Cheers,
> >
> > Carl Friedrich Bolz
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> --
> Ramon Diaz-Uriarte
> Statistical Computing Team
> Structural Biology and Biocomputing Programme
> Spanish National Cancer Centre (CNIO)
> http://ligarto.org/rdiaz



From bearophileHUGS at lycos.com  Wed Jan 10 20:06:34 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 10 Jan 2007 17:06:34 -0800
Subject: what is the idiom for copy lots of params into self?
In-Reply-To: <1168469214.452389.221180@p59g2000hsd.googlegroups.com>
References: <1168469214.452389.221180@p59g2000hsd.googlegroups.com>
Message-ID: <1168477594.373942.265430@77g2000hsv.googlegroups.com>

Emin:
> This saves a lot of code and makes it easier to see what is going on,
> but it seems like there should be a better idiom for this task. Any
> suggestions?

I know two ways of doing it, one way requires very light code into the
__init__ and it uses a decorator that takes the parameters and updates
self, but I have seen it's not much reliable in the implementation I
have.
The other way requires a bit more code into the method, but the
function code is quite short, easy to understand, and it seems reliable
enough (code from web.py, a bit modified):

def selfassign(self, locals):
    for key, value in locals.iteritems():
        if key != 'self':
            setattr(self, key, value)

Used on the first line as:

def __init__(self, foo, bar, baz=1):
    selfassign(self, locals())

Bye,
bearophile



From bearophileHUGS at lycos.com  Mon Jan 22 21:37:53 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Jan 2007 18:37:53 -0800
Subject: Symbols again
Message-ID: <1169519873.555022.150280@v45g2000cwv.googlegroups.com>

Modifying another recipe, I have defined some symbols again:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/500273

I don't know if this may be useful for something real.

Bye,
bearophile



From time.swift at gmail.com  Mon Jan  8 14:08:16 2007
From: time.swift at gmail.com (time.swift at gmail.com)
Date: 8 Jan 2007 11:08:16 -0800
Subject: Why less emphasis on private data?
In-Reply-To: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
Message-ID: <1168283295.899914.125400@38g2000cwa.googlegroups.com>

Wow, I got a lot more feedback than I expected!

I can see both sides of the argument, both on technical merits, and
more philosophical merits.  When I first learned C++ I felt
setters/getters were a waste of my time and extra code.  When I moved
to C# I still felt that, and with their 'Property" syntax I perhaps
felt it more.  What changed my mind is when I started placing logic in
them to check for values and throw expections or (hopefully) correct
the data. That's probably reason one why I find it weird in Python

Reason two is, as the user of a class or API I *don't care* what is
going on inside. All I want visible is the data that I can change.  The
'_' convention is nice.. I do see that.  I guess my old OOP classes are
hard to forget about. I feel that the state of an object should be
"stable" and "valid" at all times, and if its going into an unstable
state - error then, not later.  That's why I like being able to protect
parts of an instances state. If, as a provider of a calculation engine,
I let the user change the internal state of the engine, I have no
assurances that my product (the engine) is doing its job...

<shrugs>

I appreciate all the feed back and enjoyed reading the discussion. It
helps me understand why Python community has chosen the road they have.
- Thanks.



From ptmcg at austin.rr._bogus_.com  Sat Jan  6 12:42:37 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sat, 6 Jan 2007 11:42:37 -0600
Subject: C++/Python programmers for a MUD's gamedriver wanted.
References: <1168102038.680286.73330@42g2000cwt.googlegroups.com>
Message-ID: <459fdf8e$0$4849$4c368faf@roadrunner.com>

"Rythin" <rythin at gmail.com> wrote in message 
news:1168102038.680286.73330 at 42g2000cwt.googlegroups.com...
> Hi everyone.
> We are looking for a volunteer co-programmers for a MUD's gamedriver
> project. As of now, a gamedriver is divided into two separate but
> tightly interconnected systems - C++ driver and Python lib.
>
> C++ Driver is supposed to be managing memory, proccesses and
> communication between them (transparent as far as net is concerned).
> Python lib is to define the user's interfaces. Both of them are
> designed to work in an object-oriented enviroment, with lib's classes
> being driver's child-classes.
>

Have you considered whether the C++ Driver is even necessary?  Python's 
run-time engine already implements the memory and process management tasks, 
and does so in compiled C code (and has been tested and retested by 
hundreds, nay thousands, perhaps even millions of Python users). 
Interprocess communication can be done using CORBA or Pyro add-ons.

You may do better by "letting Python be Python" instead of confining it to 
limited user graphical and/or text interaction, and then 
marshaling/unmarshaling commands and responses to and from the C++ layer. 
Before getting too wrapped up in the C++ core/utility layer, get this (or a 
prototype) running in pure Python first, measure the performance, and then 
reimplement in C/Pyrex/ShedSkin/C++ for the performance-intensive bits.

-- Paul




From konrad.hinsen at laposte.net  Thu Jan 11 12:33:07 2007
From: konrad.hinsen at laposte.net (Konrad Hinsen)
Date: Thu, 11 Jan 2007 18:33:07 +0100
Subject: Parallel Python
In-Reply-To: <Xns98B269DCC12Fduncanbooth@127.0.0.1>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
Message-ID: <9B9711A6-8B6C-4D35-BAF1-373F81DBB4D2@laposte.net>

On Jan 8, 2007, at 11:33, Duncan Booth wrote:

> The 'parallel python' site seems very sparse on the details of how  
> it is
> implemented but it looks like all it is doing is spawning some  
> subprocesses
> and using some simple ipc to pass details of the calls and results.  
> I can't
> tell from reading it what it is supposed to add over any of the other
> systems which do the same.
>
> Combined with the closed source 'no redistribution' license I can't  
> really
> see anyone using it.

I'd also like to see more details - even though I'd probably never  
use any Python module distributed in .pyc form only.

 From the bit of information there is on the Web site, the  
distribution strategy looks quite similar to my own master-slave  
distribution model (based on Pyro) which is part of ScientificPython.  
There is an example at

http://dirac.cnrs-orleans.fr/hg/ScientificPython/main/? 
f=08361040f00a;file=Examples/master_slave_demo.py

and the code itself can be consulted at

http://dirac.cnrs-orleans.fr/hg/ScientificPython/main/? 
f=bce321680116;file=Scientific/DistributedComputing/MasterSlave.py


The main difference seems to be that my implementation doesn't start  
compute jobs itself; it leaves it to the user to start any number he  
wants by any means that works for his setup, but it allows a lot of  
flexibility. In particular, it can work with a variable number of  
slave jobs and even handles disappearing slave jobs gracefully.

Konrad.
--
---------------------------------------------------------------------
Konrad Hinsen
Centre de Biophysique Mol?culaire, CNRS Orl?ans
Synchrotron Soleil - Division Exp?riences
Saint Aubin - BP 48
91192 Gif sur Yvette Cedex, France
Tel. +33-1 69 35 97 15
E-Mail: hinsen at cnrs-orleans.fr
---------------------------------------------------------------------




From nogradi at gmail.com  Sat Jan 13 15:48:48 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sat, 13 Jan 2007 21:48:48 +0100
Subject: sqlobject 0.8.0b1 and python 2.5
In-Reply-To: <871wly7k2o.fsf@gmail.com>
References: <mailman.2691.1168697941.32031.python-list@python.org>
	<50st46F1hiu23U1@mid.uni-berlin.de> <871wly7k2o.fsf@gmail.com>
Message-ID: <5f56302b0701131248t58629ab5of998aaee1c10d8a7@mail.gmail.com>

> > To my knowledge, the 0.8.x series is the current line of development, and has
> > made major progress over the previous versions. What makes you think it will
> > be stopped developing? And where does a sqlobject2 come from?
>
> http://www.sqlobject.org/2/

Yes, that's what I meant. The website says:

"""
So, what is this?

This is a project to factor out pieces of SQLObject, and make it more
comfortable to use SQLObject in combination with ad hoc queries, to
build on SQLObject, and generally to do interesting things.
"""

as well as

"""
Right now (Feb 2006) SQLObject 2 is pre-alpha, and is very not
compatible with SQLObject 0.X.
"""

So I was wondering if waiting for sqlobject2 is a good strategy or
going ahead with sqlobject. Probably I'll do the latter (the
DeprecationWarnings also became clear in the meantime, there was some
slight API change between recent versions).


From thinker at branda.to  Mon Jan  8 02:57:13 2007
From: thinker at branda.to (Thinker)
Date: Mon, 08 Jan 2007 15:57:13 +0800
Subject: another SQL implement
Message-ID: <45A1F959.7010403@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

hello,

I have implement a SQL command generator for Python. It uses features
and syntax of Python to describe SQL schema & query. Following is a
example:

from pysqlite2 import dbapi2 as sqlite
from pysql import *

#
# define data source
# comprises tables and queries
#
class my_data_src(data_src):
def ds_definition():
class t1(pysql.table):
#
# define table 't1'
#
item = pysql.str_f()
count = pysql.int_f()
pass

class t2(pysql.table):
#
# define table 't2'
#
item = pysql.str_f()
money = pysql.float_f()
pass

#
# define a query 'get_count_and_money_of_item'
#
get_count_and_money_of_item = \
lambda: (t1 * t2) \
.fields(t1.item, t1.count * t2.money - 30) \
.where((t1.item == t2.item) & (t1.item != pysql._q))

return ds_define()
pass

cx = sqlite.connect('test
<http://heaven.branda.to/%7Ethinker/GinGin_CGI.py/show_kw_docs/test>.db')

db = my_data_src(cx) # create a instance of data source

db.init_db() # create tables

db.insert(db.t1, item='foo', count=100)
db.insert(db.t2, item='foo', money=3.2)
db.insert(db.t1, item='boo', count=50)
db.insert(db.t2, item='boo', money=3.0)

db.update(db.t1, count=140, where=~(db.t1.item == 'foo'))

cu = db.get_count_and_money_of_item('foo')
rows = cu.fetchall()
print rows

cu = db.get_count_and_money_of_item('cool')
rows = cu.fetchall()
print rows

db.commit()

pass

This is example code to define database schema and query.
get_count_and_money_of_item is initialized by a lambda expression. It
can also be a function. By inherit class data_src and defining method
ds_definition, my_data_src is acting as a wrapper of a database. It
includes two tables, t1 & t2, and a query,
get_count_and_money_of_item. Instantiate a instance of my_data_src
with a DB connection, you can create tables (init_db), insert records,
update records, and perform queries.

get_count_and_money_of_item = \
lambda: (t1 * t2) \
.fields(t1.item, t1.count * t2.money - 30) \
.where((t1.item == t2.item) & (t1.item != pysql._q))

(t1 * t2) means join tables t1 & t2, you can specify fields to be
return by query with *.fields(...). *.where() is just like WHERE
expression in SQL. get_count_and_money_of_item comprises a
free-variable; pysql._q stands as a free-variable waiting for caller
specified as parameter when calling get_count_and_money_of_item.

cu = db.get_count_and_money_of_item('foo')
rows = cu.fetchall()

It calls get_count_and_money_of_item() with 'foo' for free-variable.
A query returns a cursor defined in DBAPI.

Why another SQL ? Why not SQLObject?
RDBMS provides powerful query language, it provides performance by
reducing traffic between database & application and reducing memory
copy. A OR-mapping made RDBMS weak. DBMS is reduced as a indexed
storage. Relational algebra is so powerful & effective. Why don't
integrate it into Python language?

Downloads:
The implementation depend on pythk, so you need two modules, pysql & pythk
http://master.branda.to/downloads/pysql/pysql-20070108.tar.gz
http://master.branda.to/downloads/pythk/pythk-20070108.tar.gz


- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (FreeBSD)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFFoflZ1LDUVnWfY8gRAqw9AJ9UQ5OAOIEWo+ovELQvcKohAkWJtwCfcloq
ecOxlrstOZ77Mr9qPxlkBj0=
=U12Y
-----END PGP SIGNATURE-----



From jan-python-list at maka.demon.nl  Mon Jan 29 08:16:32 2007
From: jan-python-list at maka.demon.nl (Jan Kanis)
Date: Mon, 29 Jan 2007 14:16:32 +0100
Subject: interactive prompt in IDLE
Message-ID: <op.tmw25utfh0kyz7@aidwe2058w.minlnv.agro.nl>

Hello everyone,

I'm trying to change the interactive python prompt. According to the docs  
this is done by changing sys.ps1 and sys.ps2 . That works fine when  
running python interactively from a command line, but when running in IDLE  
the .ps1 and .ps2 don't seem to exist.

I suppose this has something to do with Idle and the python shell in it  
both running in different processes, with the prompts generated by the  
Idle process?

Does anyone know if and how to change the prompts in IDLE's interactive  
python?

Jan


From pavlovevidence at gmail.com  Wed Jan 17 02:07:49 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 16 Jan 2007 23:07:49 -0800
Subject: How to convert float to sortable integer in Python
In-Reply-To: <1169015814.960023.40310@a75g2000cwd.googlegroups.com>
References: <1168939312.223194.184770@l53g2000cwa.googlegroups.com>
	<pan.2007.01.16.09.53.46.92208@REMOVE.THIS.cybersource.com.au>
	<1169015814.960023.40310@a75g2000cwd.googlegroups.com>
Message-ID: <1169017669.651476.121910@a75g2000cwd.googlegroups.com>

shellon wrote:
> I'm sorry I mistake the function name, the function is
> floatToRawIntBits(), it convert ieee 754 floating point number to
> integer,  e.g. if f1>f2 then floatToRawBits(f1) > floatToRawBits(f1)

You can get the raw bits of a floating point number by packing into a
string then unpacking it as an integer, but the invariant you give
doesn't hold when you do that.  That is, f1>f2 does not guarantee
rawbits(f1)>rawbits(f2).  So be warned.

Python floats are double-precision internally, so the integer returned
would have to hold at least 64-bits (i.e., it'd be a long on 32-bit
platforms).

import struct

def double_to_raw_int(d):
    return struct.unpack("=q",struct.pack("=d",d))


> I want convert floating point number to sortable string to index in
> Lucene, so I want first to conver the floating point number to integer
> first, and than convert the integer to sortable string?

I presume that, by "sortable string", you mean a numerical
representation (padded or something), but if all you want is a string
containing the bits of the number, struct.pack("=d",d) will get you an
8-byte string representing the bits without having to change it to an
integer first.  Check the documentation for the struct module if you
need a certain endianness.


> so How to convert a ieee 754 floating point to raw bits like the java
> api floatToRawBits do?

See documentation for the struct module.


Carl Banks



From mail at microcorp.co.za  Thu Jan 11 01:17:07 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 11 Jan 2007 08:17:07 +0200
Subject: Is there a way to protect a piece of critical code?
References: <000b01c734a0$2f635840$03000080@hendrik>
	<45A52FD0.60802@holdenweb.com>
Message-ID: <00fd01c73548$1f7c3660$03000080@hendrik>

 "Steve Holden" <steve at holdenweb.com> wrote:


> Hendrik van Rooyen wrote:
> > Hi,
> > 
> > I would like to do the following as one atomic operation:
> > 
> > 1) Append an item to a list
> > 2) Set a Boolean indicator
> > 
> > It would be almost like getting and holding the GIL,
> > to prevent a thread swap out between the two operations.
> > - sort of the inverted function than for which the GIL
> > seems to be used, which looks like "let go", get control
> > back via return from blocking I/O, and then "re - acquire"
> > 
> > Is this "reversed" usage possible?
> > Is there some way to prevent thread swapping?
> > 
> This seems to me to be a typical example of putting the cart before the 
> horse. Therefore, please don't think that what follows is directed 
> specifically at you: it's directed at everybody who thinks that their 
> problem is something other than it really is (of course, my extensive 
> experience on c.l.py plus my well-known psychic powers uniquely qualify 
> me to explain to you that you don't understand your own problem).

Yes of course - I see this happening all the time here 
- have probably done it myself...

> 
> > The question arises in the context of a multi threaded
> > environment where the list is used as a single producer,
> > single consumer queue - I can solve my problem in various
> > ways, of which this is one, and I am curious as to if it is 
> > possible to prevent a thread swap from inside the thread.
> > 
> Of course you will know what they say about curiosity [1].
> 

My understanding about it is not as advanced as yours- 
I was under the possibly false impression that it had
something vaguely to do with felines.

> You don't say what the Boolean indicator is for. My natural inclination 
> is to assume it's to say whether there's anything in the list. The 
> Twisted crew can tell you this is a terrible mistake,. What you should 
> really do is define a function that waits until there is something to 
> put on the list and then returns a deferred that will eventually 
> indicate whether the insertion was successful [2].
> 

How did you ever guess that it was exactly what I in my 
misguided zeal to make the code understandable for myself did?

As for the Theatrical Twisted way of saying:

"Don't call us, we'll call you ! " 

I don't reeaally have the time to wait...

> But your *actual* problem appears to be the introduction of critical 
> sections into your program, a question about which computer scientists 
> have written for over forty years now, albeit in the guise of 
> discussions about how to get a good meal [3].
> 

Hmmmm - this can get philosophical - Most days, I write in assembler,
on bare metal small systems - and would ya believe - no matter how
I squirm - some bloody piece of code always turns out to be
critical - the hard part is to recognise that it is so when you write it,
Instead of having it bite you in the arse whan you are not looking.

> I could go on, but I am realising as I write that less and less of this 
> is really relevant to you. In short, please don't try to reinvent the 
> wheel when there are wheelwrights all around and a shop selling spare 
> wheels just around the corner. Python is already replete with ways to 
> implement critical sections and thread-safe queuing mechanisms [5].
> 

Now I know that a Youngster like you would not believe me when I tell
you that I know about queues and locks, so I won't bother.

> I could, of course, say
> 
> http://www.justfuckinggoogleit.com/search.pl?query=python+atomic+operation
> 
> but that would seem rude, which is against the tradition of c.l.py. 
> Besides which the answers aren't necessarily as helpful as what's been 
> posted on this thread, so I'll content myself with saying that one's can 
> often be better spent R'ing TFM than posting on this newsgroup, but that 
> while Google /may/ be your friend it's not as good a friend as this 
> newsgroup.
> 

Rudeness is against the tradition?
But bluntness is ok?

> If it isn't obvious that this post was meant more to amuse regular 
> readers than inform and/or chastise someone who isn't (yet) one then 
> please accept my apologies. Fortunately I don't normally go on like this 
> more than once a year, so now it's hey ho for 2008 [6].
> 

Happy New Year Steve - I for one have missed your posts lately.
I was beginning to feel you don't love me anymore...

8<-------------- some explanatory stuff ------------------

*sigh* - I guess all this is just a nice way of saying "no!" to the
question.

- Hendrik





From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Jan 26 13:27:51 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 26 Jan 2007 19:27:51 +0100
Subject: Mounting shares with python
References: <1169815227.574577.176610@m58g2000cwm.googlegroups.com>
Message-ID: <51uvh7F1m9svaU1@mid.individual.net>

Marcpp wrote:

> Hi, when i mount a share with python...
> 
> os.system ("mount -t smbfs -o username=nobody ...")
> 
> the problem is that I'll to be root.

Consider modifying /etc/fstab.

> Have a comand to send a root password...?
> I've tried
> 
> os.system ("su")
> os.system ("the password")
> 
> but it doesn't works.

Be advised that storing a root password as clear text can be a huge
security risk. Use sudo.

Regards,


Bj?rn

-- 
BOFH excuse #9:

doppler effect



From mail at microcorp.co.za  Fri Jan 26 02:17:28 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 26 Jan 2007 09:17:28 +0200
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org><ep8gue$3tu$1@panix3.panix.com>
	<45B90118.5010408@mvista.com>
Message-ID: <01b001c7411d$17e52a20$03000080@hendrik>

 "Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote:

> Right, I wasn't coming here to get someone to debug my app, I'm just 
> looking for ideas.  I constantly am trying to find new ways to improve 
> my software and new ways to reduce bugs, and when i get really stuck, 
> new ways to track bugs down.  The exception won't mean much, but I can 
> say that the error appears to me as bad data.  I do checks prior to 
> performing actions on any data, if the data doesn't look like what it 
> should look like, then the system flags an exception.
> 
> The problem I'm having is determining how the data went bad.  In 
> tracking down the problem a couple guys mentioned that problems like 
> that usually are a race condition.  From here I examined my code, 
> checked out all the locking stuff, made sure it was good, and wasn't 
> able to find anything.  Being that there's one lock and the critical 
> sections are well defined, I'm having difficulty.  One idea I have to 

Are you 100% rock bottom gold plated guaranteed sure that there is
not something else that is also critical that you just haven't realised is?

This stuff is never obvious before the fact - and always seems stupid
afterward, when you have found it.  Your best (some would say only)
weapon is your imagination, fueled by scepticism...

> try and get a better understanding might be to check data before its 
> stored.  Again, I still don't know how it would get messed up nor can I 
> reproduce the error on my own. 
> 
> Do any of you think that would be a good practice for trying to track 
> this down? (Check the data after reading it, check the data before 
> saving it)

Nothing wrong with doing that to find a bug - not as a general 
practice, of course - that would be too pessimistic.

In hard to find bugs - doing anything to narrow the time and place
of the error down is fair game - the object is to get you to read
some code that you *know works* with new eyes...

I build in a global boolean variable that I call trace, and when its on
I do all sort of weird stuff, giving a running commentary (either by
print or in some log like file) of what the programme is doing, 
like read this, wrote that, received this, done that here, etc.
A bare useful minimum is a "we get here" indicator like the routine
name, but the data helps a lot too.

Compared to an assert, it does not stop the execution, and you
could get lucky by cross correlating such "traces" from different
threads. - or better, if you use a queue or a pipe for the "log", 
you might see the timing relationships directly.

But this in itself is fraught with danger, as you can hit file size 
limits, or slow the whole thing down to unusability.

On the other hand it does not generate the volume that a genuine 
trace does, it is easier to read, and you can limit it to the bits that
you are currently suspicious of.

Programming is such fun...

hth - Hendrik





From paddy3118 at netscape.net  Thu Jan 25 14:50:02 2007
From: paddy3118 at netscape.net (Paddy)
Date: 25 Jan 2007 11:50:02 -0800
Subject: The reliability of python threads
In-Reply-To: <epb0s7$g2s$1@gemini.csx.cam.ac.uk>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
	<ep9t4g$uf$1@gemini.csx.cam.ac.uk>
	<1169751828.986583.47200@j27g2000cwj.googlegroups.com>
	<epb0s7$g2s$1@gemini.csx.cam.ac.uk>
Message-ID: <1169754601.992058.205640@q2g2000cwa.googlegroups.com>



On Jan 25, 7:36 pm, n... at cus.cam.ac.uk (Nick Maclaren) wrote:
> In article <1169751828.986583.47... at j27g2000cwj.googlegroups.com>,"Paddy" <paddy3... at netscape.net> writes:|>
> |> > |> Three to four months before `strange errors`? I'd spend some time
> |> > |> correlating logs; not just for your program, but for everything running
> |> > |> on the server. Then I'd expect to cut my losses and arrange to safely
> |> > |> re-start the program every TWO months.
> |> > |> (I'd arrange the re-start after collecting logs but before their
> |> > |> analysis. Life is too short).
> |> >
> |> > Forget it.  That strategy is fine in general, but is a waste of time
> |> > where threading issues are involved (or signal handling, or some types
> |> > of communication problem, for that matter).
> |>
> |> Nah, Its a great strategy. it keeps you up and running when all you
> |> know for sure is that you will most likely be able to keep things
> |> together for three months normally.
> |>
> |> The OP only thinks its a threading problem - it doesn't matter what the
> |> true fix will be, as long as arranging to re-start the server well
>                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> |> before its likely to go down doesn't take too long, compared to your
>    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> |> exploration of the problem, and, of course, you have to be able to
> |> afford the glitch in availability.
>
> Consider the marked phrase in the context of a Poisson process failure
> model, and laugh.  If you don't understand why I say that, I suggest
> finding out the properties of the Poisson process!
>
> Regards,
> Nick Maclaren.
No, you should think of the service that needs to be up. You seem to be
talking about how it can't be fixed rather than looking for ways to
keep things going. A little learning is fine but "it can't
theoretically be fixed" is no solution.
With a program that stays up for that long, the situation will usualy
work out for the better when either software versions are upgraded, or
OS and drivers are upgraded. (Sometimes as a result of the analysis,
sometimes not).

Keep your eye on the goal and your more likely to score!

- Paddy.



From vatamane at gmail.com  Wed Jan 24 17:15:47 2007
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 24 Jan 2007 14:15:47 -0800
Subject: Best way to document Python code...
In-Reply-To: <pan.2007.01.23.00.51.48.352252@bmsi.com>
References: <1169492869.101706.253620@38g2000cwa.googlegroups.com>
	<tj9th.13185$pQ3.6593@newsread4.news.pas.earthlink.net>
	<pan.2007.01.22.22.35.17.956837@bmsi.com>
	<pan.2007.01.23.00.51.48.352252@bmsi.com>
Message-ID: <1169676947.717450.310380@m58g2000cwm.googlegroups.com>

Epydoc is the way to go. You can even choose between various formating
standards (including javadoc ) and customize the output using CSS.



On Jan 22, 7:51 pm, "Stuart D. Gathman" <stu... at bmsi.com> wrote:
> On Mon, 22 Jan 2007 17:35:18 -0500, Stuart D. Gathman wrote:
> > The HTML generated by pydoc doesn't link to standard modules properly.
> > They are generated as relative links.  So it can't be used without
> > modification for generating docs for a web page about a python package.
>
> > I'm struggling with the same issue.  Coding Python is so much easier than
> > Java.  However documenting Java is so much easier than Python.  Just
> > include doc comments, run javadoc, and voila!Wow!  I just tried epydoc, and it is every bit as easy as javadoc and
> with similar output. Too bad it isn't standard.  But the comments and
> docstrings it parses work fine with pydoc also.
>
> --
>               Stuart D. Gathman <stu... at bmsi.com>
> Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
> "Confutatis maledictis, flamis acribus addictis" - background song for
> a Microsoft sponsored "Where do you want to go from here?" commercial.



From clodoaldo.pinto at gmail.com  Tue Jan  2 14:52:28 2007
From: clodoaldo.pinto at gmail.com (Clodoaldo)
Date: 2 Jan 2007 11:52:28 -0800
Subject: How to format a number?
Message-ID: <1167767548.895026.88060@n51g2000cwc.googlegroups.com>

I want to format a number with thousands separator to the 'pt_br'
locale.

I'm trying like this:

>>> import locale
>>> locale.setlocale(locale.LC_ALL, ('pt_br', 'ascii'))
'pt_BR.ISO8859-1'
>>> locale.format('%d', 9876, True)
'9876'
>>> locale.localeconv()['thousands_sep']
''
>>> locale.localeconv()['mon_thousands_sep']
'.'

The thousands separator is defined only for the ['mon_thousands_sep']
key and not for the ['thousands_sep'] one. What should be done? Set the
['thousands_sep'] to '.' or somehow build the format string as a
monetary number? If any of the former, how?

Regards, Clodoaldo Pinto Neto



From s.mientki at id.umcn.nl  Tue Jan 23 03:44:46 2007
From: s.mientki at id.umcn.nl (stef)
Date: Tue, 23 Jan 2007 09:44:46 +0100
Subject: Python Windows Editors
In-Reply-To: <ep4gp8$het$1@upsn250.cri.u-psud.fr>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<ep4gp8$het$1@upsn250.cri.u-psud.fr>
Message-ID: <7d773$45b5cb01$83aef404$30645@news2.tudelft.nl>

Laurent Pointal wrote:
> W. Watson a ?crit :
>   
>> I downloaded python-2.5.msi and installed it. I believe its editor is
>> IDE. I understand there's a Win editor called pythonwin. I believe it's
>> in the download pywin32-210.win32-py2.5.exe, but I'm not sure if this
>> exe file has just the editor or all of Python. Comments? If not how do I
>> get the PythonWin editor by itself?
>>
>>     
> Have you take a look at the IDEs page in the Python Wiki (python.org)?
>
> http://wiki.python.org/moin/IntegratedDevelopmentEnvironments
>
>   
just what I said, TOO many ;-)
and of course how do you keep these pages up-to-date ?
Zeus (commercial) isn't mentioned ...
SPE which has great credits, but can't be found, and if you find it 
somewhere, no manual and it crashes within 30 seconds (repeatly)  ;-)

Not an easy task I guess,
but it would be nice to have some voting system,
(maybe only to allow voting when you have compared at least 2 programs)
that would represent the current state,
and in which new programs would have a fair chance to start.

cheers,
Stef Mientki



From grante at visi.com  Thu Jan  4 22:29:17 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 05 Jan 2007 03:29:17 -0000
Subject: pow() works but sqrt() not!?
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
	<1167899693.759071.51450@31g2000cwt.googlegroups.com>
	<enig9a$cncb$1@zam602.zam.kfa-juelich.de>
	<mailman.2282.1167913096.32031.python-list@python.org>
	<eniuf8$cq4v$1@zam602.zam.kfa-juelich.de>
	<mailman.2299.1167962546.32031.python-list@python.org>
Message-ID: <12prhgd718if708@corp.supernews.com>

On 2007-01-05, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Thursday 4/1/2007 10:12, siggi wrote:
>
>>Thanks for the explanation. I am astonished what an interpreted
>>language is able to do!
>
> Python is as interpreted as Java.

But it's far more interactive -- at least when compared with my
limited experience with Java.

> Its numerical capabilities are more or less independent of
> this fact, I'd say.

-- 
Grant Edwards                   grante             Yow!  What PROGRAM are
                                  at               they watching?
                               visi.com            


From tiedon_jano at hotmail.com  Sun Jan  7 16:11:36 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Sun, 07 Jan 2007 21:11:36 GMT
Subject: Python cheatsheets
In-Reply-To: <mailman.2400.1168203791.32031.python-list@python.org>
References: <mailman.2400.1168203791.32031.python-list@python.org>
Message-ID: <cmdoh.280$_k2.185@read3.inet.fi>

gonzlobo kirjoitti:
> Curious if anyone has a python cheatsheet* published? I'm looking for
> something  that summarizes all commands/functions/attributes. Having
> these printed on a 8" x 11" double-sided laminated paper is pretty
> cool.
> 
> * cheatsheet probably isn't the right word, but you get the idea. :)

http://rgruet.free.fr/

HTH,
Jussi


From theller at ctypes.org  Thu Jan  4 04:08:42 2007
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 04 Jan 2007 10:08:42 +0100
Subject: question on creating class
In-Reply-To: <1167895677.041759.230190@42g2000cwt.googlegroups.com>
References: <1167895677.041759.230190@42g2000cwt.googlegroups.com>
Message-ID: <enig6q$dpf$1@sea.gmane.org>

wcc schrieb:
> Hello,
> 
> How do I create a class using a variable as the class name?
> 
> For example, in the code below, I'd like replace the line
> 
> class TestClass(object):
> with something like
> class eval(className) (object):
> 
> Is it possible?  Thanks for your help.
> 
> className = "TestClass"
> 
> class TestClass(object):
>     def __init__(self):
>         print "Creating object of TestClass..."
> 
>     def method1(self):
>         print "This is a method."
> 
> if __name__ == "__main__":
>     o = TestClass()
>     o.method1()
> 
> --
> wcc
> 

You call 'type' to create a new-style class.  The signature is:
"type(name, bases, dict) -> a new type".

>>> def __init__(self):
...     print "Creating object of TestClass..."
...
>>> def method1(self):
...     print "This is a method"
...
>>> TestClass = type("TestClass", (), {"__init__": __init__, "method1": method1})
>>>
>>>
>>> help(TestClass)
Help on class TestClass in module __main__:

class TestClass(__builtin__.object)
 |  Methods defined here:
 |
 |  __init__(self)
 |
 |  method1(self)
 |
 |  ----------------------------------------------------------------------
 |  Data and other attributes defined here:
 |
 |  __dict__ = <dictproxy object>
 |      dictionary for instance variables (if defined)
 |
 |  __weakref__ = <attribute '__weakref__' of 'TestClass' objects>
 |      list of weak references to the object (if defined)

>>> TestClass()
Creating object of TestClass...
<__main__.TestClass object at 0x00AED0B0>
>>> TestClass().method1()
Creating object of TestClass...
This is a method
>>>


Thomas



From will at willNOmcguganSPAM.com  Mon Jan  8 12:27:28 2007
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Mon, 08 Jan 2007 17:27:28 +0000
Subject: sys.exit versus raise SystemExit
In-Reply-To: <1168273151.359419.118640@42g2000cwt.googlegroups.com>
References: <45a26b70$0$32019$fa0fcedb@news.zen.co.uk>
	<1168273151.359419.118640@42g2000cwt.googlegroups.com>
Message-ID: <45a27f06$0$31239$da0feed9@news.zen.co.uk>

wittempj at hotmail.com wrote:
> 
> sys.exit() raises a SystemExit, see
> http://docs.python.org/lib/module-sys.html
> 
Oh I know. I was just wondering if there was some sort of subtle 'best 
practice' recommendation that I wasnt aware of for using sys.exit over 
raising the exception manually. In the same way that 'open' is prefered 
over 'file', even though they appear to do the same thing.

Will
--
blog: http://www.willmcgugan.com


From wangshuhao at sina.com  Thu Jan 25 10:20:08 2007
From: wangshuhao at sina.com (Wang Shuhao)
Date: Thu, 25 Jan 2007 23:20:08 +0800
Subject: how to unistall a Python package?
References: <epad97$fhqb$1@zam602.zam.kfa-juelich.de>
Message-ID: <000601c74094$4d514e20$1400a8c0@mytomato>

Third party packages are put into $PYTHONHOME\Lib\site-packages after been installed, so to uninstall them, just go there and delete the directory contains all files of your package.


----- Original Message ----- 
From: "siggi" <smusnmrNOSPAM at yahoo.com>
Newsgroups: comp.lang.python
To: <python-list at python.org>
Sent: Thursday, January 25, 2007 10:02 PM
Subject: how to unistall a Python package?


> Hi all,
> 
> installing a package with 'setup.py' is easy. But how do I uninstall the
> package, once I want to get rid of it again?
> 
> Thanks,
> 
> siggi
> 
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>

From nagle at animats.com  Wed Jan 17 20:32:20 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 18 Jan 2007 01:32:20 GMT
Subject: import vs. subdirectory search
Message-ID: <45AED511.8090307@animats.com>

Some obscure import issues:

    I'm running Python 2.3.4 from a CGI script on a shared hosting Linux system.
The CGI program is being executed from Apache, as "nobody".  I have some
local modules installed in "~myname/lib/python"; these include
"MySQLdb" and "M2Crypto".

    Since this is running as "nobody", I append

	/home/myname/lib/python

to sys.path.

    Within the CGI programs,

	import MySQLdb				# works fine
	import M2Crypto				# works fine
	import SSL				# "No module named SSL"

The problem is that SSL is in a subdirectory of the M2Crypto directory,
and that's not being searched.  I can execute "import M2Crypto.SSL",
but that doesn't have the same effect; it puts SSL in a different
place in the namespace.  I'm trying to avoid that; it causes obscure
aliasing problems.

    On Python 2.4 under Windows 2000, importing from a subdirectory
appears to work.  Is that a Python 2.3.4 thing, or a Linux thing,
or something else?

    (The idea is to be able to run (mostly) the same Python code on Windows, for
test, and Linux, for production.)

				John Nagle


From deets at nospam.web.de  Mon Jan 29 14:05:46 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 29 Jan 2007 20:05:46 +0100
Subject: List Behavior when inserting new items
In-Reply-To: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
References: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
Message-ID: <526ut2F1n2q69U1@mid.uni-berlin.de>

Drew schrieb:
> I'm looking to add an element to list of items, however I'd like to 
> add it at a specific index greater than the current size:
> 
> list = [1,2,3]
> list.insert(10,4)
> 
> What I'd like to see is something like:
> 
> [1,2,3,,,,,,4]
> 
> However I see:
> 
> [1,2,3,4]
> 
> Is there any way to produce this kind of behavior easily?

Use a dictionary?

If you know how large the list eventually will be, and that each 
position is filled, you can also use range(n) to create a list.

What is your actual usecase?

diez


From gandalf at designaproduct.biz  Tue Jan  9 13:29:16 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Tue, 09 Jan 2007 19:29:16 +0100
Subject: how to clean sys.path
In-Reply-To: <eo0eom$cirq$1@zam602.zam.kfa-juelich.de>
References: <eo0eom$cirq$1@zam602.zam.kfa-juelich.de>
Message-ID: <45A3DEFC.4060808@designaproduct.biz>


>
> So far, I know only the command >>>sys.path.append(r'c:....etc...'), but how 
> to delete or insert at the beginning of the list, I know not.
>   
You can delete a slice. For example,

del sys.path[2:5]

More about slicing: http://docs.python.org/ref/slicings.html
sys.path is a regular list. List methods: 
http://docs.python.org/tut/node7.html

Best,

   Laszlo



From adamgarstang at googlemail.com  Mon Jan 29 14:35:34 2007
From: adamgarstang at googlemail.com (Adam)
Date: 29 Jan 2007 11:35:34 -0800
Subject: Conversion of string to integer
In-Reply-To: <1170078933.180025.229830@k78g2000cwa.googlegroups.com>
References: <1170078933.180025.229830@k78g2000cwa.googlegroups.com>
Message-ID: <1170099334.373371.9870@s48g2000cws.googlegroups.com>



On Jan 29, 1:55 pm, "jupiter" <anil.jupit... at gmail.com> wrote:
> Hi guys,
>
> I have a problem. I have a list which contains strings and numeric.
> What I want is to compare them in loop, ignore string and create
> another list of numeric values.


You can iterate over the list and use the type() function to work out 
what each entry and choose what to do with it.

type() works like so:
###Code###
>>> a = ["test", 1.25, "test2"]
>>> if type(a[2]) == str:
	print "a string"


a string
>>>
###End Code###

Adam



From nyenyec at gmail.com  Tue Jan  9 08:54:43 2007
From: nyenyec at gmail.com (nyenyec)
Date: 9 Jan 2007 05:54:43 -0800
Subject: re.sub and re.MULTILINE
In-Reply-To: <1168326636.436910.165360@v33g2000cwv.googlegroups.com>
References: <1168316266.374186.271310@42g2000cwt.googlegroups.com>
	<1168326636.436910.165360@v33g2000cwv.googlegroups.com>
Message-ID: <1168350883.587686.310010@m30g2000cwm.googlegroups.com>


Paddy wrote:
> Check the arguments to re.sub.
>
> >>> re.sub('(?m)^foo', 'bar', '\nfoo', count=0)
> '\nbar'
> 
> - Paddy.

Duh! :) I appreciate it, thanks.

-- nyenyec



From redefined.horizons at gmail.com  Sun Jan  7 11:14:04 2007
From: redefined.horizons at gmail.com (redefined.horizons at gmail.com)
Date: 7 Jan 2007 08:14:04 -0800
Subject: Pausing for Python Interpreter error messages...
In-Reply-To: <459fb2b6$0$324$426a74cc@news.free.fr>
References: <1168058097.855006.229820@s80g2000cwa.googlegroups.com>
	<459fb2b6$0$324$426a74cc@news.free.fr>
Message-ID: <1168186444.362107.147670@i15g2000cwa.googlegroups.com>

Thanks Bruno.

I'll get the 2.5 python install, and I'm checking out the unit testing
module that you mentioned.

Scott Huey


Bruno Desthuilliers wrote:
> redefined.horizons at gmail.com a ?crit :
> > I've written a few classes that I have been testing in IDLE. However,
> > every time I make a change to the classes based on the testing I have
> > to walk through all he steps of preparing the classes for testing
> > again.
> >
> > So I wrote a script that does all the set-up work for me.
>
> You may want to have a look at the unittest module then:
> http://docs.python.org/lib/module-unittest.html
>
> > The only
> > problem is when I run this script using the Python interpreter I can't
> > get the command prompt to stay up long enough for me to read the
> > message.
> >
> > How do I get the command prompt to stay up?
>
> first open the "command prompt", then launch your script from the
> command prompt.
>
> > Is there a way to run my
> > script and view the error message in IDLE?
>
> menu run->run module, or just hit the F5 key.
>
> > Thanks for the help.
> >
> > Scott Huey
> >
> > P.S. - I'm using Windows XP with the latest Python 2.3.
> > 
> 
> Python 2.3 is years old. Latest is 2.5.



From erinhouston at gmail.com  Fri Jan 26 11:32:34 2007
From: erinhouston at gmail.com (ina)
Date: 26 Jan 2007 08:32:34 -0800
Subject: newbie - returned values from cscript.exe
In-Reply-To: <1169666769.242698.70730@j27g2000cwj.googlegroups.com>
References: <1169666769.242698.70730@j27g2000cwj.googlegroups.com>
Message-ID: <1169829154.071074.209580@h3g2000cwc.googlegroups.com>

I did the same thing back before I knew about python and com.
I hope this example gets you on the right track.

It is just a simple script that does a dir and returns prints it out.

import os, sys
dCall = "dir"
resultFromCall = os.popen(dCall)
#get data back from the system call
mv = resultFromCall.read()
resultFromCall.close()
print mv



On Jan 24, 12:26 pm, "Rich" <richfa... at gmail.com> wrote:
> I am writing my first python script and I'm guessing this is something
> obvious but I can't find any examples of doing something like this.  I
> have a python script that is running a vbscript through cscript.exe.
> The vbscript looks up a server name, username, password etc and returns
> these values in a delimited list using wscript.echo.  I can assign
> these values to variables using a Windows batch files with the
> following code
>
> FOR /F "tokens=1-6" %%a in ('cscript /nologo GetServerAccessInfo.vbs"')
> do (
>         SET DB_SERVER_NAME=%%a
>         SET DB_NAME=%%b
>         SET NMDBO_USERNAME=%%c
>         SET NMDBO_PASSWORD=%%d
>         SET SU_USERNAME=%%e
>         SET SU_PASSWORD=%%f
>
> I can't figure out how to do the same thing using a python script to
> call this instead of a batch file.
>
> I am running the vbscript by using the following command
> os.system('cscript /nologo GetServerAccessInfo.vbs')



From surekap at gmail.com  Thu Jan 25 01:46:26 2007
From: surekap at gmail.com (Prateek)
Date: 24 Jan 2007 22:46:26 -0800
Subject: Fast Imaging for Webserver
Message-ID: <1169707586.701908.32860@v45g2000cwv.googlegroups.com>

Hi. I'm creating a web-application using CherryPy 2.2.1. My application
needs to process images (JPG/PNG files) to

1) create thumbnails (resize them)
2) overlay them on a custom background (a simple frame)
3) Overlay 'badges' (small 16x16 images) on top of the final thumbnail

I am using PIL 1.1.5 which I have custom compiled on my development
machine (MacBook Pro 2.33Ghz Core Duo)..
I am using im.thumbnail for step 1 and im.paste for steps 2 and 3.

The problem is that this thing is just way too slow.
For ab -n 1000 -C session_id=2f55ae2dfefa896f67a80f73045aadfa4b4269f1
http://localhost:8080/imaging/icon/def/128/255 (where def is the name
of the image - default in this case - 128 is the size in pixels and 255
is the background color), I am getting:

Document Path:          /imaging/icon/def/128/255
Document Length:        14417 bytes

Concurrency Level:      1
Time taken for tests:   18.664 seconds
Complete requests:      1000
Failed requests:        0
Broken pipe errors:     0
Total transferred:      14680000 bytes
HTML transferred:       14417000 bytes
Requests per second:    53.58 [#/sec] (mean)
Time per request:       18.66 [ms] (mean)
Time per request:       18.66 [ms] (mean, across all concurrent
requests)
Transfer rate:          786.54 [Kbytes/sec] received

FYI: This request returns a PNG image (image/png) and not html

My understanding is that the problem is either with the CherryPy setup
(which is likely because even in other cases, i don't get much more
than 65 requests per second) or PIL itself (even though I'm caching the
background images and source images)

Does anyone have a better solution? Is there a faster replacement for
PIL?

Thanks in advance.
Prateek



From michele.simionato at gmail.com  Mon Jan 15 06:17:57 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 15 Jan 2007 03:17:57 -0800
Subject: Python web app. (advice sought)
In-Reply-To: <45aae51b.0@entanet>
References: <45aae51b.0@entanet>
Message-ID: <1168859876.833009.118190@11g2000cwr.googlegroups.com>

Duncan Smith wrote:
> Hello,
>      I find myself in the, for me, unusual (and at the moment unique)
> position of having to write a web application.  I have quite a lot of
> existing Python code that will form part of the business logic.  This
> relies on 3rd party libraries (such as numpy) which would make porting
> to e.g. IronPython difficult (I would imagine).  I was thinking LAMP
> (the P standing for Python, of course), particularly as I was originally
> encouraged to go for open source solutions.
>
> The application will provide some basic statistical analyses of data
> contained in database tables and associated plots (R / matplotlib /
> graphviz).  There will also be some heavier duty Monte Carlo simulation
> and graphical modelling / MCMC.  The user(s) will need to be able to set
> model parameters; maybe even tinker with model structure, so it will be
> very interactive (AJAX?).
>
> I've had a look at Django, Turbogears and Plone, and at the moment I am
> torn between Turbogears and Plone.

I assume it will be an application with few users and no particular
need for
security. Read PEP 333, use the wsgiref server which is in the standard
library
(starting from Python 2.5+), have a look at Paste and write your own
solution.
At the least this is the way I did it.

         Michele Simionato



From albert.wellens at gmail.com  Tue Jan 16 12:02:34 2007
From: albert.wellens at gmail.com (awel)
Date: 16 Jan 2007 09:02:34 -0800
Subject: Check a windows service
Message-ID: <1168966952.965088.17740@l53g2000cwa.googlegroups.com>

Hi,

I'm new in python and I would like to know if it's possible to check if
a specific windows service is present and if it's possible how can I
do?

Thanks



From horpner at yahoo.com  Tue Jan 16 08:37:16 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 16 Jan 2007 14:37:16 +0100
Subject: assert versus print [was Re: The curious behavior of integer
	objects]
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
	<mailman.2744.1168901460.32031.python-list@python.org>
	<pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>
	<76fd5acf0701151838l1a724be5n3f1e1fda629d1464@mail.gmail.com>
	<mailman.2762.1168916788.32031.python-list@python.org>
	<1168931486.610893.250040@38g2000cwa.googlegroups.com>
	<mailman.2772.1168951023.32031.python-list@python.org>
Message-ID: <slrneqpld3.1r4.horpner@FIAD06.norwich.edu>

On 2007-01-16, Ron Adam <rrr at ronadam.com> wrote:
> I have to admit that part of why assert seems wrong to me is
> the meaning of the word implies something you shouldn't be able
> to ignore.  While warnings seem like something that can be
> disregarded.

Experienced C coders expect assert to behave like that.

The only reason (I know of) to turn off error checking is to
optimize. However, removing tests won't usually make a big enough
speed difference to be worth the burthen of testing two different
versions of the same source code.

So to me the assert statement is either dubious syntax-sugar or
dangerous, depending on Python's command line arguments.

The warning module would seem to have limited applications.
Searching my Python distribution shows that it's used for
deprecation alerts, and elsewhere for turning those selfsame
alerts off. How copacetic! It is the null module. ;-)

-- 
Neil Cerutti
Facts are stupid things. --Ronald Reagan


From janencarl at aznex.net  Thu Jan 25 20:38:36 2007
From: janencarl at aznex.net (Carl Trachte)
Date: Thu, 25 Jan 2007 18:38:36 -0700
Subject: Getting started with Crystal Reports...little help in the far
	court.
References: <1168293388.349793.256790@s80g2000cwa.googlegroups.com>
Message-ID: <xq-dnaAPTI8LxiTYnZ2dnUVZ_ompnZ2d@trueband.net>

Marc,

    I've been able to get some Business Objects COM functionality in
Business Objects 6.5 (the logging in functionality I have to do through a
call to an Excel VBA macro; otherwise things appear to work for what I'm
doing).

    Unfortunately, I don't have experience with Python in Business Objects
XI or Crystal Reports.  I did have to play with makepy on a couple Business
Objects files to get something useful.  I believe I eventually struck
paydirt with busobj.exe (but don't quote me on it - it's been a while).

    This information probably isn't terribly useful.  The best advice I can
give is to try the respective Crystal Reports and Business Objects XI
executable files with makepy.  If there's no joy there, start working with
the dll's and see if they yield something that works.

    Hopefully someone with a bit more win32 or BO XI experience will chime
in.  In the meantime, good luck.

Carl T.

"Mudcat" <mnations at gmail.com> wrote in message
news:1168293388.349793.256790 at s80g2000cwa.googlegroups.com...
> I am not that familiar with Crystal Reports, but having read some other
> posts I know that the way to integrate the API with Python is through
> the COM interface provide by win32all.
>
> However, I have been unable to find any other information on how to get
> started. I've used the COM interface before in integrating Excel and a
> couple of other things. So I am familiar with how that works. But there
> are at least 40 options dealing with Crystal and Business Objects. I
> have no idea which makepy file to create or which one provides the
> functionality I need.
>
> I'm not looking to do much. All I'm really trying to do is provide one
> application where a list of crystal reports can be selected and ran in
> series. Right now we have a lot of reports that all have to be run
> manually (takes a while). So I think all I need api access to is server
> selection, parameter selection, and output formats.
>
> Any pointers in the right direction would be helpful.
>
> Thanks,
> Marc
>




From bearophileHUGS at lycos.com  Wed Jan 17 05:16:35 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 17 Jan 2007 02:16:35 -0800
Subject: How can I create a linked list in Python?
In-Reply-To: <pan.2007.01.17.09.11.39.502517@gmx.net>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<1168983652.192715.235580@a75g2000cwd.googlegroups.com>
	<pan.2007.01.17.09.11.39.502517@gmx.net>
Message-ID: <1169028995.133660.299320@m58g2000cwm.googlegroups.com>

Marc 'BlackJack' Rintsch:
> Python has a list type without the "s, it's a real list.  Don't confuse
> the *ADT list* with *linked lists* which are just one implementation of
> the ADT list.

Right, I was mostly talking about (single/double) linked lists :-)

Bye,
bearophile



From nagle at animats.com  Thu Jan 25 15:51:51 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 25 Jan 2007 20:51:51 GMT
Subject: Python does not play well with others
In-Reply-To: <7xveiudg4o.fsf@ruckus.brouhaha.com>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
	<1169726842.719104.304300@v45g2000cwv.googlegroups.com>
	<wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
	<1169755188.989078.75510@v33g2000cwv.googlegroups.com>
	<7xveiudg4o.fsf@ruckus.brouhaha.com>
Message-ID: <HL8uh.13092$ji1.4793@newssvr12.news.prodigy.net>

Paul Rubin wrote:
> "sjdevnull at yahoo.com" <sjdevnull at yahoo.com> writes:
> 
>>I haven't had a need to do anything with OpenSSL from Python; all
>>that takes place in the Apache server 
> 
> 
> That's a reasonable approach for a typical server-side web
> application, but there are other types of Python apps that can also
> want to use SSL.  It's a pain to have to deal with OpenSSL at all, and
> I hope that TLSLite (a very incomplete SSL implementation written in
> pure Python) one day becomes complete and does all the stuff that JSSE
> does.

    That's the problem.  We now have four SSL implementations for
Python, none of which let you do all the things OpenSSL can do.

    The fact that people keep writing new ones, instead of fixing the
existing ones, indicates a problem with the development process.

    Can you build the built-in SSL package without building all of
Python?  That in itself would be useful.  Then the thing could
be worked on without too much pain.  The built-in SSL package
basically works, although it doesn't check anything.  It just
doesn't get at enough OpenSSL functionality.

    I think the right way out of this mess is to 1) break
out the SSL module so it can be built separately by the
usual "python setup.py build" process, 2) add more
access functions to the built-in SSL C glue module, 3) bring over
such Python parts of M2Crypto as are useful and make them
work with the built-in SSL module, and 4) get rid of SWIG.

    If somebody will do 1), I'll take a look at 2).

				John Nagle


From nunya at busyness.info  Wed Jan 10 10:33:14 2007
From: nunya at busyness.info (Lefty Bigfoot)
Date: Wed, 10 Jan 2007 15:33:14 GMT
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
	<N6Uoh.43209$wc5.29633@newssvr25.news.prodigy.net>
	<eo2t6h$8qk_014@s808.apx1.sbo.ma.dialup.rcn.com>
Message-ID: <0001HW.C1CA63B1059BC980F0203648@news.verizon.net>

On Wed, 10 Jan 2007 08:28:33 -0600, jmfbahciv at aol.com wrote
(in article <eo2t6h$8qk_014 at s808.apx1.sbo.ma.dialup.rcn.com>):

> In article <N6Uoh.43209$wc5.29633 at newssvr25.news.prodigy.net>,
>    "Elan Magavi" <Elan at nomailnospam.com> wrote:
>> Is that like.. OctaPussy?
> 
> I didn't read their stuff.  Are they really trying to put a 
> round peg in a square hole?

Sounds more like an octagonal pole in a round hole.


-- 
Lefty
All of God's creatures have a place..........
.........right next to the potatoes and gravy.
See also: http://www.gizmodo.com/gadgets/images/iProduct.gif



From gagsl-py at yahoo.com.ar  Sun Jan 14 22:25:53 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 15 Jan 2007 00:25:53 -0300
Subject: Conflicting needs for __init__ method
In-Reply-To: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070114235851.01f01c18@yahoo.com.ar>

At Sunday 14/1/2007 20:32, dickinsm at gmail.com wrote:

>Of course, none of this really has anything to do with rational
>numbers.  There must be many examples of classes for which internal
>calls to __init__, from other methods of the same class, require
>minimal argument processing, while external calls require heavier and
>possibly computationally expensive processing.  What's the usual way
>to solve this sort of problem?

In some cases you can differentiate by the type or number of 
arguments, so __init__ is the only constructor used.
In other cases this can't be done, then you can provide different 
constructors (usually class methods or static methods) with different 
names, of course. See the datetime class, by example. It has many 
constructors (today(), fromtimestamp(), fromordinal()...) all of them 
class methods; it is a C module.

For a slightly different approach, see the TarFile class (this is a 
Python module). It has many constructors (classmethods) like taropen, 
gzopen, etc. but there is a single public constructor, the open() 
classmethod. open() is a factory, dispatching to other constructors 
depending on the combination of arguments used.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From bearophileHUGS at lycos.com  Wed Jan 24 20:03:55 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 24 Jan 2007 17:03:55 -0800
Subject: Static variables
In-Reply-To: <45b7cfd4$0$16160$426a74cc@news.free.fr>
References: <ep8gkl$g7v$3@news.in.tum.de>
	<fVPth.1713$G23.1170@newsreading01.news.tds.net>
	<45b7cfd4$0$16160$426a74cc@news.free.fr>
Message-ID: <1169687035.433771.177900@v45g2000cwv.googlegroups.com>

Bruno Desthuilliers:
> And this let you share state between functions:
>
> def make_counter(start_at=0, step=1):
>    count = [start_at]
>    def inc():
>      count[0] += step
>      return count[0]
>    def reset():
>      count[0] = [start_at]
>      return count[0]
>    def peek():
>      return count[0]
>
>    return inc, reset, peek
>
> foo, bar, baaz = make_counter(42, -1)
> print baaz()
> for x in range(5):
>     print foo()
> print bar()
> print baaz()

An interesting solution, I have never created such grouped clorures. I
don't know if this solution is better than a class with some class
attributes plus some class methods...

Bye,
bearophile



From bjourne at gmail.com  Wed Jan 17 04:03:46 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Wed, 17 Jan 2007 10:03:46 +0100
Subject: Conflicting needs for __init__ method
In-Reply-To: <873b6abp12.fsf@benfinney.id.au>
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<mailman.2741.1168898073.32031.python-list@python.org>
	<pan.2007.01.16.03.02.03.4711@REMOVEME.cybersource.com.au>
	<740c3aec0701160837r33340866w5ddef3e09a0de537@mail.gmail.com>
	<873b6abp12.fsf@benfinney.id.au>
Message-ID: <740c3aec0701170103k29c17df9xdb8c32a3a878ac00@mail.gmail.com>

On 1/16/07, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> "BJ?rn Lindqvist" <bjourne at gmail.com> writes:
>
> > import rational
> > rational.rational(45)
> > rational.rational(45.0)
> > rational.rational([45, 45.5])
> >
> > def rational(obj):
> >     initers = [(int, from_int), (basestring, from_str), (list, from_list)]
> >     for obj_type, initer in initers:
> >         if isinstance(obj, obj_type):
> >             return initer(obj)
> >     raise ValueError("Can not create a rational from a %r" % type(obj).__name__)
>
> You've just broken polymorphism. I can't use your factory function
> with an instance of my custom type that behaves like a list, but is
> not derived from list (or a non-'int' int, or a non-'basestring'
> string).

Indeed, but I do not think that is fatal. There are many functions in
Pythons stdlib that breaks duck typing exactly like that.

> Use the supplied value as you expect to be able to use it, and catch
> the exception (somewhere) if it doesn't work. That will allow *any*
> type that exhibits the correct behaviour, without needlessly
> restricting it to a particular inheritance.

Can you show an example of that? It seems like that approach would
lead to some very convoluted code.

-- 
mvh Bj?rn


From jmfbahciv at aol.com  Wed Jan 10 09:28:33 2007
From: jmfbahciv at aol.com (jmfbahciv at aol.com)
Date: Wed, 10 Jan 07 14:28:33 GMT
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
	<N6Uoh.43209$wc5.29633@newssvr25.news.prodigy.net>
Message-ID: <eo2t6h$8qk_014@s808.apx1.sbo.ma.dialup.rcn.com>

In article <N6Uoh.43209$wc5.29633 at newssvr25.news.prodigy.net>,
   "Elan Magavi" <Elan at nomailnospam.com> wrote:
>
><octabox at gmail.com> wrote in message 
>news:1168354695.334946.157400 at 51g2000cwl.googlegroups.com...
>> Hello all,
>>
>> I represent Octabox, an Internet Start-up developing a wide-scale
>> platform for Internet services.  We are very interested to know your
>> thoughts on Internet productivity and how it might be improved, and to
>> that end we have set up a short survey at our website -
>> http://www.octabox.com/productivity_poll.php
>> We would very much appreciate if you would take a couple of minutes to
>> fill it up and influence our direction and empahsis.
>>
>> Thanks in advance,
>> Octabox Development Team
>
>Is that like.. OctaPussy?

I didn't read their stuff.  Are they really trying to put a 
round peg in a square hole?

/BAH


From eXt at sidvind.com  Thu Jan 11 10:59:45 2007
From: eXt at sidvind.com (eXt)
Date: 11 Jan 2007 07:59:45 -0800
Subject: Problem with byte-compiled code
Message-ID: <1168531185.036979.43890@o58g2000hsb.googlegroups.com>

Hi, I have built some modules in C++to extend python. At first
everything worked but then I began splitting my python code into
several modules. The application begins in main.py and then imports my
other modules.

The first time I run the application it works, but when python imports
the byte compiled module all I get is a blank window. Moving back all
the code into the same source file works.

I have found that removing a call to a C++ function solves the problem.
However that function is needed and I found that if I print anything
inside that function it works. It isn't time related since I tried to
sleep instead but that didn't work either.

I'm not sure if this is the correct list but I hope someone can help me
a bit.

The C++ function:

TaskScheduler& createTaskScheduler(int threadCnt, const char* logfile){
    //print("createTaskScheduler");
    TaskScheduler::initialize(threadCnt,logfile);
    return TaskScheduler::singleton();
}

Boost exporting:

def("createTaskScheduler", createTaskScheduler,
        return_value_policy<reference_existing_object>());

Python code:

ts = Core.createTaskScheduler(1,'')



From danielkleinad at gmail.com  Tue Jan 30 14:50:30 2007
From: danielkleinad at gmail.com (Daniel Klein)
Date: Tue, 30 Jan 2007 19:50:30 GMT
Subject: MoinMoin
Message-ID: <3b8vr2tj0nc2hra616pm96m2turqm0v0vg@4ax.com>

Is it fair game to ask questions about MoinMoin here?

If not, can someone recommend a resource please?

Dan


From ian at excess.org  Wed Jan  3 23:13:22 2007
From: ian at excess.org (Ian Ward)
Date: Wed, 03 Jan 2007 23:13:22 -0500
Subject: ANN: Urwid 0.9.7.2 - Console UI Library
Message-ID: <459C7EE2.7060506@excess.org>

Announcing Urwid 0.9.7.2
------------------------

Urwid home page:
   http://excess.org/urwid/

Tarball:
   http://excess.org/urwid/urwid-0.9.7.2.tar.gz


About this release:
===================

This maintenance release significantly improves the performance of
Urwid when run in UTF-8 mode.  A UTF-8 input handling bug was also
fixed.


New in this release:
====================

   * Improved performance in UTF-8 mode when ASCII text is used.

   * Fixed a UTF-8 input bug.

   * Added a clear() function to the the display modules to force
     the screen to be repainted on the next draw_screen() call.


About Urwid
===========

Urwid is a console UI library for Python. It features fluid interface
resizing, UTF-8 support, multiple text layouts, simple attribute markup,
powerful scrolling list boxes and flexible interface design.

Urwid is released under the GNU LGPL.





From sschwarzer at sschwarzer.net  Tue Jan  2 07:25:03 2007
From: sschwarzer at sschwarzer.net (Stefan Schwarzer)
Date: Tue, 02 Jan 2007 13:25:03 +0100
Subject: simple ftputil ssl client
In-Reply-To: <1167589633.246117.130710@42g2000cwt.googlegroups.com>
References: <1167589633.246117.130710@42g2000cwt.googlegroups.com>
Message-ID: <459A4F1F.8000208@sschwarzer.net>

On 2006-12-31 19:27, Croteam wrote:
> I trying to make ftputil client that uses ssl security.First I was try
> to make that with M2Crypto,but
> when I use it, I get the error:
>
> Traceback (most recent call last):
>   File "<pyshell#32>", line 1, in -toplevel-
>     import M2Crypto
>   File "C:\Python24\lib\site-packages\M2Crypto\__init__.py", line 15,
> in -toplevel-
>     import m2
>   File "C:\Python24\Lib\site-packages\M2Crypto\m2.py", line 28, in
> -toplevel-
>     from __m2crypto import *
> ImportError: DLL load failed with error code 182

It seems this problem has nothing to do with ftputil, so it might
be best to post the question on the failed import alone with a
subject like

ImportError for M2Crypto: "DLL load failed with error code 182"

or even, since a Google search implies the problem doesn't occur
only for M2Crypto,

ImportError: "DLL load failed with error code 182"

With the current subject, people may think "I don't know ftputil"
and don't read your posting at all.

You might ask the question with the above subject on the
Python-Crypto mailing list which seems to be the best place for
M2Crypto-related questions. You should tell the version of
M2Crypto and the operating system you use. By the way, have you
tried other M2Crypto versions?

Can you import the module when the current directory is the one
containing the DLL? To check, change to the directory and start
the interactive Python interpreter. (If you use an IDE or
something similar, as your traceback suggests, that program might
change the directory before the import statement runs.)
Additionally, you can try to modify sys.path to contain the path
of the DLL before invoking the import statement. See also my
response on the ftputil mailing list.

> ...so now I trying to make it with pyOpenSSL or twistedmatrix ssl,but I
> don't know how.If anybody
> have any idea or example how to I make it,please help me!!!

Now the part specific to ftputil ;-) ...

If you can't use M2Crypto, try to make sure that you have a class
which is compatible with ftplib.FTP. You can pass such a class as
session_factory to ftputil.FTPHost's constructor. If you don't
have such a class, you might be able to write it yourself.

Stefan

-- 
Dr.-Ing. Stefan Schwarzer
SSchwarzer.com - Softwareentwicklung f??r Technik und Wissenschaft
http://sschwarzer.com
http://www.sschwarzer.net


From bdesth.quelquechose at free.quelquepart.fr  Wed Jan 31 15:43:43 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 31 Jan 2007 21:43:43 +0100
Subject: Sorting a List of Lists
In-Reply-To: <1170266993.041224.75990@a34g2000cwb.googlegroups.com>
References: <1170201351.881776.257790@q2g2000cwa.googlegroups.com>
	<45c08cd3$0$22805$426a74cc@news.free.fr>
	<1170266993.041224.75990@a34g2000cwb.googlegroups.com>
Message-ID: <45c0f88e$0$4321$426a74cc@news.free.fr>

Paddy a ?crit :
> On Jan 31, 12:35 pm, Bruno Desthuilliers <bruno.
(snip)
>>Also, using comparison functions is usually not the most efficient way
>>to do such a sort. In your case, I'd go for a good old
>>Decorate/sort/undecorate (AKA schwarzian transform):
>>
>>events = [evt for date, evt in
>>           sorted([(evt[2], evt) for evt in events])]
>>
>>HTH
> 
> 
> I agree with you B., but see the comments here:
>   http://www.biais.org/blog/index.php/2007/01/28/23-python-sorting-
> efficiency
> for information on the relative speeds of rolling your own DSU versus
> using itemgetter and key=...

Yeps, looks like 2.5 got a real speedup wrt/ itemgetter. Nice to know, 
and thanks for the link (BTW, this profileit() decorator looks pretty 
nice too !-)



From sergey at fidoman.ru  Thu Jan 25 05:55:27 2007
From: sergey at fidoman.ru (Sergey Dorofeev)
Date: Thu, 25 Jan 2007 13:55:27 +0300
Subject: module email
References: <ep7vuk$235b$1@news.rtcomm.ru> <874pqgf7hb.fsf@smsnet.pl>
Message-ID: <epa2at$2vc7$1@news.rtcomm.ru>


"Rob Wolfe" <rw at smsnet.pl> wrote in message news:874pqgf7hb.fsf at smsnet.pl...

>> p2=email.message.Message()
>> p2.set_type("message/rfc822")
>> p2.set_payload(m)
>
> Payload is a _list_ of Message objects (is_multipart() == True)
> or a _string_ object (is_multipart() == False) but never just Message 
> object.

1. If I give m.as_string() into set_payload, result is the same.
2. I don't understand, how message/rfc822 section can accept a list of two 
or more messages. Can you explain?




From wolf_tracks at invalid.com  Sun Jan 21 19:33:12 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Mon, 22 Jan 2007 00:33:12 GMT
Subject: Python Windows Editors
In-Reply-To: <1169415514.562496.248950@a75g2000cwd.googlegroups.com>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<1169415514.562496.248950@a75g2000cwd.googlegroups.com>
Message-ID: <cDTsh.36657$Gr2.3763@newssvr21.news.prodigy.net>

mensanator at aol.com wrote:
> W. Watson wrote:
>> I downloaded python-2.5.msi and installed it. I believe its editor is IDE. I
>> understand there's a Win editor called pythonwin. I believe it's in the
>> download pywin32-210.win32-py2.5.exe, but I'm not sure if this exe file has
>> just the editor or all of Python. Comments? If not how do I get the
>> PythonWin editor by itself?
>>
>> BTW, one of the features I did not like of IDE is the limited file Print
>> command. It puts everything in 16pt type, and gives no choice over what
>> pages should be printed. Maybe there's an option?
> 
> Print your files from Notepad, after all, they're just text files.
> But IDLE has more usefull Formatting options.
Thanks. Already did it, but used Word. I can get line numbers in that way.


From paddy3118 at netscape.net  Wed Jan 31 23:46:10 2007
From: paddy3118 at netscape.net (Paddy)
Date: 31 Jan 2007 20:46:10 -0800
Subject: how to "free" an object/var ?
In-Reply-To: <pan.2007.02.01.01.45.27.594090@REMOVEME.cybersource.com.au>
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
	<epolgl$8i4$1@zinnia.noc.ucla.edu>
	<pan.2007.01.31.06.52.12.82782@REMOVEME.cybersource.com.au>
	<1170228172.691120.200280@a75g2000cwd.googlegroups.com>
	<pan.2007.01.31.07.34.24.221453@REMOVEME.cybersource.com.au>
	<1170264406.588032.116550@s48g2000cws.googlegroups.com>
	<pan.2007.02.01.01.45.27.594090@REMOVEME.cybersource.com.au>
Message-ID: <1170305170.533198.215020@l53g2000cwa.googlegroups.com>

On Feb 1, 1:45 am, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
wrote:
> On Wed, 31 Jan 2007 09:26:46 -0800, Paddy wrote:
> > On Jan 31, 7:34 am, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
> > wrote:
>
> [snip]
>
> >> --
> >> Steven D'Aprano
>
> > Thanks Stephen for explaining my answer a bit more.
>
> Ste_ph_en???
>
> I know the ph-form of the name is marginally more popular, but dammit my
> name is right there just two lines above where Paddy started typing, how
> hard is it to get it right?
>
> It's not like I spell my name with four M's and a silent Q like the famous
> author Farles Wickens *wink*
>
> --
> Steven D'Aprano
> who thinks there can never be too many Monty Python references

Please accept my most humblest of apologies Steven D'Aprano. I can
only think I had a brain seizure between reading, and writing your
name,

Come to think of it... The Stephen/Steven confusion should only apply
when you *hear* the name said? Now I don't read aloud newsgroups to
myself; but I do (still), have a head cold. Maybe I should lie down
and rest....

- Paddy.



From timr at probo.com  Mon Jan  1 02:29:05 2007
From: timr at probo.com (Tim Roberts)
Date: Mon, 01 Jan 2007 07:29:05 GMT
Subject: A question about  unicode() function
References: <1167571210.084436.311610@48g2000cwx.googlegroups.com>
Message-ID: <8udhp21q3jvsdgfqt0a79uab2rrdpffqe7@4ax.com>

"JTree" <eastera at gmail.com> wrote:
>
>Hi,all
>     I encountered a problem when using unicode() function to fetch a
>webpage, I don't know why this happenned.
>     My codes and error messages are:
>
>
>Code:
>#!/usr/bin/python
>#Filename: test.py
>#Modified: 2006-12-31
>
>import cPickle as p
>import urllib
>import htmllib
>import re
>import sys
>
>def funUrlFetch(url):
>    lambda url:urllib.urlopen(url).read()
>
>objUrl = raw_input('Enter the Url:')
>content = funUrlFetch(objUrl)
>content = unicode(content,"gbk")
>print content
>content.close()

Once you fix the lambda, as Felipe described, there's another issue here.
You are telling the unicode function that the string you're passing it is
an 8-bit string encoded as gbk.  How do you know that?  In your specific
example, www.msn.com, I can guarantee it will produce the wrong results:
www.msn.com is encoded in UTF-8.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From gagsl-py at yahoo.com.ar  Wed Jan 10 23:46:34 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 01:46:34 -0300
Subject: Newbie - converting csv files to arrays in NumPy - Matlab
	vs. Numpy comparison
In-Reply-To: <1168458486.538863.316130@k58g2000hse.googlegroups.com>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
Message-ID: <7.0.1.0.0.20070111014007.03f76798@yahoo.com.ar>

At Wednesday 10/1/2007 16:48, oyekomova wrote:

>Thanks for your help. I compared the following code in NumPy with the
>csvread in Matlab for a very large csv file. Matlab read the file in
>577 seconds. On the other hand, this code below kept running for over 2
>hours. Can this program be made more efficient? FYI - The csv file was
>a simple 6 column file with a header row and more than a million
>records.
>
>
>import csv
>from numpy import array
>import time
>t1=time.clock()
>file_to_read = file('somename.csv','r')
>read_from = csv.reader(file_to_read)
>read_from.next()
>
>datalist = [ map(float, row[:]) for row in read_from ]
>
># now the real data
>data = array(datalist, dtype = float)
>
>elapsed=time.clock()-t1
>print elapsed

Replace that row[:] by row, it's just a waste of time and memory.
And see http://www.scipy.org/Cookbook/InputOutput


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From jhefferon at smcvt.edu  Wed Jan 31 07:57:18 2007
From: jhefferon at smcvt.edu (Jim)
Date: 31 Jan 2007 04:57:18 -0800
Subject: error messages containing unicode
In-Reply-To: <pan.2007.01.31.06.39.55.881990@REMOVEME.cybersource.com.au>
References: <1170122515.980168.150960@p10g2000cwp.googlegroups.com>
	<pan.2007.01.30.02.48.10.853852@REMOVEME.cybersource.com.au>
	<1170160464.576122.62230@h3g2000cwc.googlegroups.com>
	<pan.2007.01.31.06.39.55.881990@REMOVEME.cybersource.com.au>
Message-ID: <1170248238.032665.207180@m58g2000cwm.googlegroups.com>

Thanks Steve, I appreciate your patience.

On Jan 31, 1:39 am, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
wrote:
> If the built-in isn't Unicode aware, subclassing it won't magically make
> it so :-)
Oh, I agree.  If I have a string mesg that is unicode-not-ascii and I
say
  try:
      raise Exception mesg
  except Exception, err:
      print "Trouble"+mesg
then I have problems.   I  however am under the impression, perhaps
mistaken, that the built-in exceptions in the library will return as
error strings only ascii.  (I take as evidence of my understanding
that the built-in exceptions have a __str__() method but do not have
an explicit __unicode__() and so rely on a unicode(err) call being
passed on to __str__().  But as I've said above, I've been wrong so
many times before.  ;-)

My main point about the built-ins is that I want to catch them along
with my own exceptions.  That's what I meant by the next paragraph.
My class myException is a subclass of Exception so I can catch my
stuff and the standard stuff with an all-in-one panic button.
>
> > For instance, I write a lot of CGI and I want to wrap everything in a
> > try .. except.
> >   try:
> >       main()
> >   except Exception, err:
> >       print "Terrible blunder: ",str(err)
> > so that the err can be one of my exceptions, or can be one that came
> > with Python.
> > (And, that I can see, err.args can be either the relevant
> > string or a tuple containing the relevant string and the documentation
> > is silent on whether in the built-in exceptions if err.args is a tuple
> > then the string is guaranteed to be first in the tuple.)
>
> Does it matter? Just print the tuple.
In truth, it does matter.  In that example, for instance, some error
message is passed on to the user and I don't want it to be too bad.
"Database cannot be opened" is better than a "(u'Database cannot be
opened,1)"-type thing.  Besides which, Python is a nice language, and
I'm certain there is a nice way to do this; it is just that I'm having
trouble making it out.

> >> (2) convert the file name to ASCII before you store it; or
>
> > I need the non-ascii information, though, which is why I included it
> > in the error message.
>
> If you have the exception captured in "err", then you can grab it with
> err.where_i_put_the_unicode.
I want a method of grabbing it that is the same as the method used by
the built-ins, for the uniformity reasons that I gave above.   That I
could make out, the documentation was silent on what is the approved
way to grab the string.

> >> (3) add a __str__ method to your exception that is Unicode aware.
>
> > I have two difficulties with this: (1) as above I often raise Python's
> > built-in exceptions and for those __str__() is what it is, and
>
> Then don't use the built-in exception. If it won't do what you want it do
> do, use something else.
I use my exceptions for errors in my logic, etc.  But not being
perfect, sometimes I raise exceptions that I had not anticipated;
these are built-ins.

> > (2) this
> > goes against the meaning of __str__() that I find in the documentation
> > in ref/customization.html which says that the return value must be a
> > string object.
>
> I didn't mean return a unicode object :)
>
> You're absolutely correct. Your __str__ would need to return a string
> object, which means encoding the Unicode correctly to get a string object
> without raising an exception.
>
> e.g. something like this maybe (untested, not thought-through, probably
> won't work correctly, blah blah blah):
>
> def __str__(self):
>     s = self.args.encode('ascii', 'replace')
>     return "Unicode error converted to plain ASCII:\n" + s
>
> or whatever encoding scheme works for your application.
I did discuss this suggestion from another person above.  That would
mean either (a) throwing away the unicode-not-ascii parts of the error
message (but I want those parts, which is why I put them in there) or
(b) hard-coding the output encoding for error strings in hundreds of
error cases (yes, I have hundreds) or (c) passing as a parameter the
errorEncoding to each function that I write.  That last case doesn't
seem to be to be a likely best practice for such a nice language as
Python; I want a way to get the unicode object and go forward in the
program with that.

> It can take whatever you want it to take:
>
> class MyStupidException(Exception):
>     def __init__(self, dayofweek, breakfast="spam and baked beans",
>         *everythingelse):
>         self.day = dayofweek
>         self.breakfast = breakfast
>         self.args = everythingelse
>     def __str__(self):
>         s = "On %s I ate %s and then an error '%s' occurred." % \
>         (self.day.title(), self.breakfast, self.args)
>         return s
>
> >>> raise MyStupidException('monday', 'cheese', 'bad things', 'happened', 2)
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> __main__.MyStupidException: On Monday I ate cheese and then an error
> '('bad things', 'happened', 2)' occurred.
Thank you for the example; I learned something from it.  But as I
mentioned above, I need to guard against the system raising built-ins
also and so I am still a bit puzzled by how to get at the error
strings in built-ins.

In case anyone is still reading this :-)  someone else suggested the
err.message attribute.  I had missed that in the documentation
somehow, but on rereading it, I thought he had solved my problem.
However, sadly, I cannot get Python to like a call to err.message:
..........................................................
$ python
Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02)
[GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> try:
...     raise Exception, 'this is the error message'
... except Exception, err:
...     print "result: ",err.message
...
result:
Traceback (most recent call last):
  File "<stdin>", line 4, in ?
AttributeError: Exception instance has no attribute 'message'
>>>
......................................................................................

So, in case it helps anyone, I am going with this:
.....................................................................................
def errorValue(err):
    """Return the string error message from an exception message
string.
      err  exception instance
    Note: I cannot get err.message to work.  I sent a note to clp on
    Jan 29 2007 with a related query and this is the best that I
figured
    out.
    """
    return err[0]

class jhError(StandardError):
    """Subclass this to get exceptions that behave correctly when
    you do this.
      try:
          raise subclassOfJhError, 'some error message with unicode
chars'
      except subclassOfJhError, err
          mesg='the message is '+unicode(err)
    """
    def __unicode__(self):
        return errorValue(self)

class myException(jhError):
    pass
....................................................................................

No doubt I'll discover what is wrong with it today.  :-)

Jim



From martin at v.loewis.de  Thu Jan  4 03:33:17 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 04 Jan 2007 09:33:17 +0100
Subject: minidom utf-8 encoding
In-Reply-To: <1167868380.481121.154880@42g2000cwt.googlegroups.com>
References: <1167868380.481121.154880@42g2000cwt.googlegroups.com>
Message-ID: <459cbbce$0$15834$9b622d9e@news.freenet.de>

fscked schrieb:
> Hi guys/gals.
> 
> I am trying to write and xml file from data parsed from a csv.
> 
> I can get everything to work except that I cannot get minidom to do -->
> ? which needless to say is driving me nuts.
> 
> Any suggestions?

Works fine for me:

py> d = minidom.Document()
py> r = d.createElement("root")
py> r.appendChild(d.createTextNode(u"\xf6"))
<DOM Text node "\xf6">
py> d.appendChild(r)
<DOM Element: root at -0x482ab614>
py> d.toxml()
u'<?xml version="1.0" ?>\n<root>\xf6</root>'
py> print d.toxml()
<?xml version="1.0" ?>
<root>?</root>

Regards,
Martin


From ruan at jcmills.com  Thu Jan 18 19:31:20 2007
From: ruan at jcmills.com (Dongsheng Ruan)
Date: Thu, 18 Jan 2007 19:31:20 -0500
Subject: How to pass arguments to the function embedded in the timeit.Timer()
Message-ID: <eop3h3$a325$1@netnews.upenn.edu>

Hi

      Does anybody know how to pass multiple arguments to the function 
tested in timeit.timer() in
python?

I googled and found how to pass one argument:

x=10000
mytime = timeit.Timer( setup="from Createlst import createlst", stmt=
"createlst(%s)"%(x) )

But how can I extend it to two or more arguments?

Like this:

p1=createlst.createlst(10000)
p2=createlst.createlst(10000)
mytime = timeit.Timer(setup="from list_concat_copy import list_concat_copy",
stmt="list_concat_copy.list_concat_copy(%x,%y)"%p1,p2 )

I don't know how to end the timeit.Timer. Should it be (%x,%y)"%p1,p2  or
(%x,%y)"%p1,%p2 or (%x,%y)"(%p1%p2) .

I tried and none worked. I just got error message like global variable "A'
not defined.

Can anybody help?

Thanks!





From gert.cuykens at gmail.com  Fri Jan  5 23:34:54 2007
From: gert.cuykens at gmail.com (gert)
Date: 5 Jan 2007 20:34:54 -0800
Subject: attribute decorators
Message-ID: <1168058094.179442.173650@s34g2000cwa.googlegroups.com>

Would it not be nice if you could assign decorators to attributes too ?
for example

class C:
  @staticattribute
  data='hello'

or

class C:
  @privateattribute
  data='hello'



From consmash at gmail.com  Wed Jan 24 12:57:09 2007
From: consmash at gmail.com (consmash at gmail.com)
Date: 24 Jan 2007 09:57:09 -0800
Subject: Noob Question: Force input to be int?
In-Reply-To: <1169546377.017596.43840@k78g2000cwa.googlegroups.com>
References: <1169546377.017596.43840@k78g2000cwa.googlegroups.com>
Message-ID: <1169661429.273191.14010@v45g2000cwv.googlegroups.com>



On 23 Sty, 10:59, wd.jons... at gmail.com wrote:
> Hello everyone!
> I have a piece of code that looks like this:
>
> if len(BuildList) > 0:
>     print "The script found %d game directories:" % len(BuildList)
>     print
>     num = 0
>     for i in BuildList:
>         print str(num) +"       " + i
>         num = num + 1
>     print
>     print "Select a build number from 0 to " + str(len(BuildList) - 1)
>     buildNum = int(raw_input('Select build #> '))
>
>     while buildNum > (len(BuildList) -1) or buildNum <= -1:
>         print
>         print "Error: Invalid build number!"
>         print "Select a build number from 0 to " + str(len(BuildList) -
> 1)
>         print
>         buildNum = int(raw_input('Select build: '))
>
> The problem is with the while buildNum-loop. If the user enters a
> non-numeric value in the buildNum input, the scripts throws an
> exception. I need to constrict the user to ONLY use integers in the
> input box. How can I solve this issue?

Also if you would like to try mentioned approach 'Look before you
leap', this code should be quite clear:

buildNumber = ('foo', 'bar')
n = len(buildNumber)
loop = True
while loop:
    input = raw_input('select a build number from 0 to %d: ' % (n-1))
    if input.isdigit():
        ch = int(input)
        loop = not ch in range(n)  # if ch is NOT in range of [0, n),
then it is ok to loop
    if loop:
        print 'Error! Invalid build number'
print 'Choice: %d' % ch

In fact I don't know if it applies to python, but in conventional
languages it is a bad habit to use exceptions for every simple test as
it takes time to jump around code. So, correct me please.



From weekender_ny at yahoo.com  Mon Jan 22 01:03:53 2007
From: weekender_ny at yahoo.com (John)
Date: 21 Jan 2007 22:03:53 -0800
Subject: html + javascript automations = [mechanize + ?? ] or
	somethingelse?
In-Reply-To: <mailman.2978.1169445486.32031.python-list@python.org>
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
	<1169441279.556814.16770@38g2000cwa.googlegroups.com>
	<mailman.2978.1169445486.32031.python-list@python.org>
Message-ID: <1169445833.722792.53680@a75g2000cwd.googlegroups.com>


I tried it, didnt work with the python25 distribution msi file that is
on python.org
But activestate python worked. Now I can open IE using COM. What I am
trying
to figure out is how to click an x,y coordinate on a page in IE
automatically
using COM. How about typing something automatically...Any ideas?

Thanks,
--j

Gabriel Genellina wrote:
> "John" <weekender_ny at yahoo.com> escribi? en el mensaje
> news:1169441279.556814.16770 at 38g2000cwa.googlegroups.com...
>
> > My python2.5 installation on windows did not come with "win32com".
> > How do I install/get this module for windows?
>
> Look for the pywin32 package at sourceforge.net
> 
> -- 
> Gabriel Genellina



From evan at binarymanipulations.com  Tue Jan  2 02:14:38 2007
From: evan at binarymanipulations.com (Evan Carmi)
Date: Tue, 2 Jan 2007 07:14:38 +0000 (UTC)
Subject: how to move files based on file-ending from dirs and subdirs to
	specific dir?
Message-ID: <loom.20070102T080728-958@post.gmane.org>

hey,

i am trying to move files with a specific file-ending (.msf) to dir above their
current location. my code so far works as long as all the files are on the same
dir level.

but how can i make it work if there are multiple subdirs with files inside of
them on different dir levels?


my code so far is:
---
top = 'f:\\test\\mail'


import os, time, itertools

#walk and find all files
allfiles = []
for root, dirs, files in os.walk(top, topdown=False):
    for name in files:
        allfiles.append(os.path.join(root, name))
#remove all non .msf files
index = []	
for match in allfiles:
  if match.endswith('.msf'):
    index.append(match)

indexdest = []	
indexdest = ['%s\\..\\..\\%s\\%s\\%s' % (x , time.strftime('%Y%m%d%H%M%S'),
os.path.basename(os.path.normpath(x+'\\..')), os.path.basename(x)) for x in ind
ex]

#\\.. to remove the ending and than basename to add it back on
indexdest = [os.path.normpath(i) for i in indexdest]
indexdest = [i.replace('Mail', 'backups-msf') for i in indexdest]

for a, b in itertools.izip(index, indexdest):
  os.renames(a, b)
--

i want the .msf files to be in a dir on the same level as where the top string
points to (in this case f:\test\backups-msf).

thanks,
Evan

p.s. is there a more accurate word for a directory level or something on the
same "tier" of a directory?





From ggrp1.20.martineau at dfgh.net  Fri Jan  5 19:10:15 2007
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 5 Jan 2007 16:10:15 -0800
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
Message-ID: <1168042215.514023.121560@s80g2000cwa.googlegroups.com>

Stef Mientki wrote:
> Not sure I wrote the subject line correct,
> but the examples might explain if not clear
>
>
> *** first attempt ***
> class pin:
>    def __init__ (self):
>      self.Name  = 'Unknown Pin'
>
> aap = pin()             # create an instance
> aap.Name = 'aap'        # set it's name
> print aap.Name          # print it's name
> 			# but why should I set it's name ??
> print 'aap'		# I can just as well print a constant string !!
>                          # (ok there will be an extra check)

While I agree that it's likely you're confusing Python objects and
names, Python *is* an interpreted language and therefore very flexible.
Here's a snippet showing one way to remove the 'redundancy'. (Be
forewarned that doing things like this is highly distasteful to some
people.)

### non-redundant example ###
import sys

class Pin:
    def __init__(self, name, namespace=None):
        self.name = name
        if namespace == None:
            # default to caller's globals
            namespace = sys._getframe(1).f_globals
        namespace[name] = self

Pin('aap')       # create a Pin object named 'aap'
Pin('aap2')     # create a Pin object named 'aap2'
print aap.name
print aap2.name

-Martin



From michael at mustun.ch  Tue Jan  2 13:42:44 2007
From: michael at mustun.ch (mm)
Date: Tue, 02 Jan 2007 19:42:44 +0100
Subject: array of class
Message-ID: <459AA7A4.40901@mustun.ch>


How can I do a array of class?

s1=[]  ## this array should hold classes

## class definition
class Word:
   word=""


## empty words... INIT
for i in range(100):  ## 0..99
   s1.append(Wort)

s1[0].word="There"
s1[1].word="should"
s1[2].word="be"
s1[3].word="different"
s1[4].word="classes"

... but it's not.


print s1
------------
[<class __main__.Wort at 0x7ff1492c>,
<class __main__.Wort at 0x7ff1492c>,
<class __main__.Wort at 0x7ff1492c>,
<class __main__.Wort at 0x7ff1492c>,
<class __main__.Wort at 0x7ff1492c>,
<class __main__.Wort at 0x7ff1492c>,
........
-----------

Here, this "classes" are all at the same position in memory. So there 
are no different classes in the array.

So I access with s1[0], s1[1], s1[2], etc. always the same data.

Any idea?

--
Michael



From gagsl-py at yahoo.com.ar  Thu Jan 18 09:29:36 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 18 Jan 2007 11:29:36 -0300
Subject: Is it possible to fasten the import of cgi?
References: <45af6f47$0$322$e4fe514c@news.xs4all.nl>
Message-ID: <eoo08j$mh1$1@sea.gmane.org>

"Cecil Westerhof" <dummy at dummy.nl> escribi? en el mensaje 
news:45af6f47$0$322$e4fe514c at news.xs4all.nl...

>I have a cgi-script dat uses the modules cgi, os, sys and time. Offcourse I
> can not time the time used to import time, but os and sys do not take more
> as a millisecond. My script itself takes 3 or 4 milliseconds. But 
> importing
> cgi takes 95 milliseconds. (This is on my test system a PII 300 MHz. Is
> there a way to make this more fast? The import off cgi makes the script at
> least 20 times as slow. Something like mod-python is not a possibility. I
> could use it on my test machine, but not at the osting provider.
Surely os was imported earlier, and was already loaded. sys is a builtin 
module. But I think your problem is not how much time takes importing cgi, 
but how much time takes launching a new python process on each request.

-- 
Gabriel Genellina 




From chrisspen at gmail.com  Fri Jan 12 19:54:11 2007
From: chrisspen at gmail.com (Chris)
Date: 12 Jan 2007 16:54:11 -0800
Subject: AlphaBeta Search
Message-ID: <1168649650.163717.263240@38g2000cwa.googlegroups.com>

I know this probably seems trivial, but I can't seem to find the bug in
my alphabeta search implementation.

I'm testing it with the game of tic-tac-toe. If the first player plays
in a corner, the correct move is to play in the center, but for some
reason my code thinks the center and remaining corner positions are all
equally good moves.

I adopted my code almost exactly from the pseudo-code posted in the
wikipedia article (http://en.wikipedia.org/wiki/Alpha-beta_pruning).
Can anyone point out if I'm doing anything clearly wrong, or if the
pseudo-code isn't correct? Any help is appreciated.

infinity = 1e99999999
def alphaBeta(root, maxDepth=10):
    """Search game to determine best action; use alpha-beta pruning."""

    player = root.turn

    def is_terminal(node, depth):
        '''The default test cuts off at depth d or at a terminal
state.'''
        return depth > maxDepth or node.isGameOver()

    def heuristic_value(node):
        '''Returns heuristic value of game relative to the turn in the
root game.'''
        player1Score,player2Score = node.getScore()
        if node.turn == player:
            score = player1Score-player2Score
        else:
            score = player2Score-player1Score
        return score

    def search(node, alpha, beta, depth):
        if is_terminal(node, depth):
            return heuristic_value(node)
        for nextNode in node.getNextNodes():
            v = alpha = max(alpha, -search(nextNode, -beta, -alpha,
depth+1))
            if alpha >= beta:
                break
        return v

    # Evaluate all choices.
    choices = map(lambda node: (search(node, -infinity, infinity, 0),
node.actionHistory[-1]),
                  root.getNextNodes())

    # Chose best action.
    score,action = max(choices)
    
    return action



From usenet200701 at tobyinkster.co.uk  Wed Jan 31 04:17:40 2007
From: usenet200701 at tobyinkster.co.uk (Toby A Inkster)
Date: Wed, 31 Jan 2007 09:17:40 +0000
Subject: Web File System
References: <1170059509.601069.153290@q2g2000cwa.googlegroups.com>
Message-ID: <ke3694-69f.ln1@ophelia.g5n.co.uk>

anthony.cutrone wrote:

> Files and folders have to be in an SQL database, mounted in ext3-like 
> system. File would be identified by a single ID, and links with names 
> should be connected on these IDs.

Take a look at FUSE.

Also, have you considered subversion?

-- 
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact
Geek of ~ HTML/CSS/Javascript/SQL/Perl/PHP/Python*/Apache/Linux

* = I'm getting there!


From http  Wed Jan 17 17:21:29 2007
From: http (Paul Rubin)
Date: 17 Jan 2007 14:21:29 -0800
Subject: Would a Dutch speaker please check this wiki page please?
References: <mailman.2852.1169070591.32031.python-list@python.org>
Message-ID: <7xwt3l47me.fsf@ruckus.brouhaha.com>

skip at pobox.com writes:
>     http://wiki.python.org/moin/Selcuk_Altun
> 
> I suspect it's junk since it doesn't seem to mention Python and the website
> it mentions doesn't seem to exist.  Still, just in case...

I'm not a dutch speaker but treating it as garbled german-english
"captcha", I think it says: Welcome to the site www.keriwar.nl.  The
site is online and if you have questions, first read the FAQ.

Googling "keriwar" finds
http://www.webscripters.be/leden/profiel.php?member=keriwar

Anyway I think you can junk the page.


From sturlamolden at yahoo.no  Tue Jan 16 23:58:02 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 16 Jan 2007 20:58:02 -0800
Subject: How can I create a linked list in Python?
In-Reply-To: <45ad5104$0$393$426a74cc@news.free.fr>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<eojb9v$92rq$1@netnews.upenn.edu>
	<45ad5104$0$393$426a74cc@news.free.fr>
Message-ID: <1169009882.408482.43360@q2g2000cwa.googlegroups.com>


Bruno Desthuilliers wrote:

> Implementing linked lists in Python is not a great deal - it just
> doesn't make much sens.

It does make sence, as there are memory constraints related to it.
Python lists are arrays under the hood. This is deliberately. Dynamic
arrays grows faster than lists for the common "short list" case, and
because indexing an array is O(1) instead of O(N) as it is for linked
lists. You can easily break the performance of Python lists by adding
objects in the middle of a list or appending objects to the end of long
lists. At some point the list can not grow larger by a simple realloc,
as it would crash with other objects on the heap, and the whole list
must be replaced by a brand new memory segment.

Also linked lists are an interesting theoretical concept in computer
science. Understanding how dynamic datastructures work and their
limitations are a key to understanding algorithms and how computers
work in general.

The simplest way of implementing a linked list in Python is nesting
Python lists. One may e.g. type something like:

#create
mylist = []

# push
mylist = [someobject, mylist]

# pop
mylist = mylist[1]

#iterate
cur = mylist
while cur:
   cur = cur[1]

This is actually single linked list that behaves like a stack, i.e. the
last added element sits on top and one needs to iterate the list to get
to the first.

Those who know Lisp should be familiar with the concept of creating
dynamic data structures form nesting lists; it may be more unfamiliar
to C and Pascal programmers, as these languages do not support such
constructs. In Python one may also use a more explicit solution
involving classes for expressing linked lists, which would be more
familiar to C and Pascal programmers. In any case, making linked lists
are trivial in Python.



From larry.bates at websafe.com  Mon Jan 15 19:33:13 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 15 Jan 2007 18:33:13 -0600
Subject: Watch log
In-Reply-To: <1168892415.324184.273210@l53g2000cwa.googlegroups.com>
References: <1168892415.324184.273210@l53g2000cwa.googlegroups.com>
Message-ID: <AZKdnSloy9rYgDHYnZ2dnUVZ_uKknZ2d@comcast.com>

Salvatore Di Fazio wrote:
> Hi guys,
> I've an application that writes a log file.
> I need to write an application with python that will read this file.
> 
> I would like wait until a new line will be write in the file.
> 
> Something like the "watch cat Log" command on Linux os.
> 
> How can I check the eof and restart the reading?
> 
You didn't provide much info so here goes.  If you use the
logger module built into Python you can set up a logger that
uses sockets.  Have your program log to a socket and have the
other program read from the socket.  That way you will always
have the latest log entries in the monitor program.

If you can't control the program that writes the log file,
have your monitoring program look for change in the length
of the logfile (you can use the os.stat module for this).
When it changes, open the file, seek to the old length and
read bytes up to the new length and close the logfile.
What is read will be the new log entry (or entries).
Reset the logfile length high water mark and loop.

Hope information helps.

-Larry Bates


From subscriber100 at rjs.org  Fri Jan 12 11:03:29 2007
From: subscriber100 at rjs.org (Ray Schumacher)
Date: Fri, 12 Jan 2007 08:03:29 -0800
Subject: threads - was:Is there a way to protect a piece of critical
  code?
Message-ID: <6.2.3.4.2.20070112073246.02e7e950@pop-server.san.rr.com>

"Hendrik van Rooyen" wrote:
 > Similarly discrete background thread jobs can be used
 > in a functional style this way:
 >  http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491280
 > ( an alternative for the laborious OO-centric threading.

With the various options available, many of which I haven't used 
(CallQueue for example), I am wondering what the "best" methodology 
to use is for a 2-task example on a dual core processor for my next project:

-One task is an ADC data collection/device driver whose sole job in 
life is to fill a numpy "circular buffer" with data from an external 
ADC device at high speed and expose a pointer - programmatically 
complex but functionally distinct from the analysis task. It is I/O 
bound and spends time waiting on the ADC.
-The main task is analysis of that data in near-real time with FFT, 
correlations etc, and computationally bound. It needs to have read 
access to the array and a pointer, and kill the ADC task when desired.

Thoughts/opinions are humbly requested,
Ray



From mail at microcorp.co.za  Fri Jan 19 03:57:23 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 19 Jan 2007 10:57:23 +0200
Subject: Would a Dutch speaker please check this wiki page please?
References: <mailman.2852.1169070591.32031.python-list@python.org><a9dd0$45aea341$d443bb3a$10472@news.speedlinq.nl>
	<45af4735$0$322$e4fe514c@news.xs4all.nl>
Message-ID: <010101c73bd4$750de960$03000080@hendrik>

"Martin P. Hellwig" <mhellwig at xs4all.nl> wrote:


> Stef Mientki wrote:
> > skip at pobox.com wrote:
> >> Got a note about a new page on the Python Wiki:
> >>
> >>>>>>> "Wade" == Wade McDaniel <wmcdaniel at wolfgangsvault.com> writes:
> >>
> >>     http://wiki.python.org/moin/Selcuk_Altun
> >>
> >> I suspect it's junk since it doesn't seem to mention Python and the 
> >> website
> >> it mentions doesn't seem to exist.  Still, just in case...
> > The only (incorrect) Dutch sentence on the whole site is:
> >   "Welkom op me site www.keriwar.nl",
> > which should have been
> >   "Welkom op mijn site www.keriwar.nl"
> > but that could be explained, while his name "Selcuk Altun" is not 
> > orginated from the Netherlands.
> > I just expect that he is trying to setup a wiki,
> > but that's too soon to give it a judgement.
> > 
> > cheers,
> > Stef Mientki
> >>
> >> Thx,
> >>
> >> Skip
> 
> Could be Afrikaans too, but the page is gone now so I can't check.

No its not Afrikaans - the "me" would have had to be "my" and "site"
would have been "webwerf" - literally "web yard"...

Some Flemish dialect, perhaps?

- Hendrik





From bdesth.quelquechose at free.quelquepart.fr  Thu Jan 11 15:50:48 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 11 Jan 2007 21:50:48 +0100
Subject: globals accros modules
In-Reply-To: <3137a$45a6851a$d443bb3a$24085@news.speedlinq.nl>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>
	<mailman.2556.1168492539.32031.python-list@python.org>
	<3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>
	<45a66cea$0$289$426a34cc@news.free.fr>
	<3137a$45a6851a$d443bb3a$24085@news.speedlinq.nl>
Message-ID: <45a69cca$0$321$426a74cc@news.free.fr>

Stef Mientki a ?crit :
> Bruno Desthuilliers wrote:
> 
>> stef a ?crit :
(snip)
>>> You can explain your collegaes, that
>>> - the startindex of arrays changes from 1 to 0
>>> - slices are upto, instead of including the final border
>>> - indention is th? key
>>> And tell them about all beautiful things in Python,
>>> but tell them that they are going to loose all their globals ???
>>
>>
>> It's a feature. Globals are definitively a BadThing(tm).
> 
> 
> yes, I know, but my audience will accept that only in the long term.

Unless you clearly explain the benefits... Any code relying on the 
existence of a global is:
1/ dependent on the existence of this global
2/ harder to understand

FWIW, I'm currently fixing a simple Delphi program that's using quite a 
few globals, and since I'm not familiar with ObjectPascal (my experience 
with Pascal boils down to a few cs101 stuff like implementing a linked 
list, some 6 or 7 years ago), I'm losing a lost of time with these [bip] 
globals...

> But maybe this idea works:
> 
> <file Ugly_MatLab_Globals.py>
> global var1
> global var2
> </file Ugly_MatLab_Globals.py>

The 'global' statement only makes sens within a function, and it's only 
a declaration, not a definition (-> it won't bind the following name by 
itself - only tell the interpreter that this name is to be considered as 
belonging to the module's namesepace ).

The minimal working example requires that you assign a default value:

# myglobs.py
meaning_of_life = 42

# another.py
import myglobs
print myglobs.meaning_of_life

> 
> <all other py-files in the project>
> import Ugly_MatLab_Globals
> 
> def some_function():
>   import Ugly_MatLab_Globals

You don't have to reimport it here...

> 
> (btw who owns the BadThing tm ;-)

I Do(tm) !-)


From bj_666 at gmx.net  Sun Jan  7 05:30:54 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 07 Jan 2007 11:30:54 +0100
Subject: AES256 in PyCrypto
References: <1168134542.337448.261510@s34g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.07.10.30.53.653351@gmx.net>

In <1168134542.337448.261510 at s34g2000cwa.googlegroups.com>, mirandacascade
wrote:

> Would the following Python code perform AES256 encryption on plainText
> from Crypto.Cipher  import AES
> x = AES.new(a, AES.MODE_CBC, iv)
> x.encrypt(plainText)
> 
> assuming:
> a = the key value
> iv = an initialization vector
> ?

`a` must be of length 32 for AES256.  And the length of `plainText` must
be a multiple of 16 because it's a block cypher algorithm.

Ciao,
	Marc 'BlackJack' Rintsch


From wleftwich at gmail.com  Thu Jan  4 08:48:05 2007
From: wleftwich at gmail.com (Wade Leftwich)
Date: 4 Jan 2007 05:48:05 -0800
Subject: Iterate through list two items at a time
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
	<12pmahqc7kclbfc@corp.supernews.com>
	<1167882211.696350.271620@s34g2000cwa.googlegroups.com>
	<1167913980.320964.264860@s34g2000cwa.googlegroups.com>
	<eniss1$oot$00$1@news.t-online.com>
Message-ID: <1167918485.053278.206990@s34g2000cwa.googlegroups.com>

Peter Otten wrote:
> Wade Leftwich wrote:
>
> > from itertools import groupby
> >
> > def chunk(it, n=0):
> >     if n == 0:
> >         return iter([it])
> >     def groupfun((x,y)):
> >         return int(x/n)
> >     grouped = groupby(enumerate(it), groupfun)
> >     counted = (y for (x,y) in grouped)
> >     return ((z for (y,z) in x) for x in counted)
> >
> >>>> [list(x) for x in chunk(range(10), 3)]
> > [[0, 1, 2], [3, 4, 5], [6, 7, 8], [9]]
> >
> >>>> [x for x in chunk(range(10), 3)]
> > [<generator object at 0xb7a34e4c>,
> >  <generator object at 0xb7a34dac>,
> >  <generator object at 0xb7a34d2c>,
> >  <generator object at 0xb7a34d6c>]
>
> Note that all but the last of these generators are useless:
>
> >>> chunks = [x for x in chunk(range(10), 3)]
> >>> [list(x) for x in chunks]
> [[], [], [], [9]] # did you expect that?
> In [48]: chunkgen = chunk(range(10), 3)

In [49]: for x in chunkgen:
   ....:     print list(x)
   ....:
   ....:
[0, 1, 2]
[3, 4, 5]
[6, 7, 8]
[9]

> Peter

That's an interesting gotcha that I've never run into when using this
function, because in practice I never put the generator returned by
chunk() inside a list comprehension.

In [51]: chunkgen = chunk(range(10), 3)

In [52]: [list(x) for x in chunkgen]
Out[52]: [[0, 1, 2], [3, 4, 5], [6, 7, 8], [9]]

But, as you pointed out --

In [57]: chunkgen = chunk(range(10), 3)

In [58]: chunks = list(chunkgen)

In [59]: [list(x) for x in chunks]
Out[59]: [[], [], [], [9]]

So apparently when we list(chunkgen), we are exhausting the generators
that are its members. And if we do it again, we get rid of the [9] --

In [60]: [list(x) for x in chunks]
Out[60]: [[], [], [], []]

I'll admit that chunk() is needlessly tricky for most purposes. I wrote
it to accept a really lengthy, possibly unbounded, iterator and write
out 10,000-line files from it, and also to play with Python's new
functional capabilities.

-- Wade



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Jan 11 12:14:52 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 11 Jan 2007 18:14:52 +0100
Subject: What about this?
References: <1168525050.536736.74590@i39g2000hsf.googlegroups.com>
Message-ID: <50n9kcF1g30l4U2@mid.individual.net>

new wrote:

> www.magicoz.com
> amazing

Yeah, it *is* really amazing that someone dares to spam for such an
unprofessional homepage. Even too stupid to include a doctype ...


Bj?rn

-- 
BOFH excuse #61:

not approved by the FCC



From horpner at yahoo.com  Thu Jan 18 08:23:57 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 18 Jan 2007 13:23:57 GMT
Subject: A note on heapq module
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<45ad0f6c$1@nntp0.pdx.net>
	<1168982702.903306.152940@m58g2000cwm.googlegroups.com>
	<slrneqs6j1.l0.horpner@FIAD06.norwich.edu>
	<1169118077.035345.321580@11g2000cwr.googlegroups.com>
Message-ID: <slrneqv0hf.b0.horpner@FIAD06.norwich.edu>

On 2007-01-18, bearophileHUGS at lycos.com <bearophileHUGS at lycos.com> wrote:
> Neil Cerutti:
>> One more idea, cribbed from the linked list thread elsewhere:
>> it might be nice if your Heap could optionally use an
>> underlying collections.deque instead of a list. I don't know
>> how excellent Python's deque is, but it's possible a deque
>> would provide a faster heap than a contiguous array. C++'s
>> std::deque is the default implementation of C++'s
>> std::priority_queue for that reason (unless I'm confused
>> again).
>
> If you have some minutes you can do few speed tests and show us
> the code and the timing results...

I'll see what I can come up with. I'll have to test using the
native Python implementation, which should work with deque,
rather than the optimized C implementation, which doesn't. 

Unfortunately the inability to take advantage of the C
implementation of heapq might swamp any possible advantage of
using deque instead of list in a Heap class.

-- 
Neil Cerutti

-- 
Posted via a free Usenet account from http://www.teranews.com



From jwaixs at gmail.com  Fri Jan 12 13:52:55 2007
From: jwaixs at gmail.com (Noud Aldenhoven)
Date: Fri, 12 Jan 2007 18:52:55 +0000
Subject: Rational Numbers
In-Reply-To: <eo8bvr$bhs$1@sea.gmane.org>
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<eo65qk$bsr$1@sea.gmane.org>
	<cb63d1e10701111420l28d0f0d0s35217370d86067b@mail.gmail.com>
	<eo8bvr$bhs$1@sea.gmane.org>
Message-ID: <cb63d1e10701121052m7572f817gb7c257bc598e66e3@mail.gmail.com>

On 1/12/07, Facundo Batista <facundo at taniquetil.com.ar> wrote:
>
> Noud Aldenhoven wrote:
>
> > There are a (small) couple of other issues where rational numbers could
> be
> > handy. That's because rational numbers are exact, irrational numbers (in
> > python) aren't. But these issues are probably too mathematical to be
> used in
>
> For the sake of me being less ignorant, could you please point me a
> language where irrational numbers are exact?


I'm not sure, but I tought MAPLE could do it. This language has been
designed for solving mathimatical equotations (and other simulair stuf) and
could handle irrational numbers.
But ofcourse irrational numbers could never be exact when printed in an
g-notation (g > 1) system.

But now I mention that sentense is wrong... it should be: "That's because
rational numbers are exact, but in python they aren't most of the time."

To make irrational numbers exact in python should be, I think, more
unefficient than making rational numbers. But they could be very handy too
for calculating maths or physics equotations.

Regards,

Noud

-- 
<:3 )~
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070112/49b559bb/attachment.html>

From kent at kentsjohnson.com  Tue Jan  2 15:13:56 2007
From: kent at kentsjohnson.com (Kent Johnson)
Date: Tue, 02 Jan 2007 20:13:56 GMT
Subject: Some basic newbie questions...
In-Reply-To: <1167326253.557372.124110@a3g2000cwd.googlegroups.com>
References: <1167324002.516960.319870@79g2000cws.googlegroups.com>
	<12p7tah6gbtq53d@corp.supernews.com>
	<1167326253.557372.124110@a3g2000cwd.googlegroups.com>
Message-ID: <459ABD03.4030808@kentsjohnson.com>

jonathan.beckett wrote:
  I'm just finding it a bit weird that some of the built in functions are
> static, rather than methods of objects (such as len() being used to
> find the length of a list).

Another explanation here:
http://effbot.org/pyfaq/why-does-python-use-methods-for-some-functionality-e-g-list-index-but-functions-for-other-e-g-len-list.htm

Kent


From fsck_spam at telenet.be  Wed Jan 17 14:07:30 2007
From: fsck_spam at telenet.be (Rikishi 42)
Date: Wed, 17 Jan 2007 20:07:30 +0100
Subject: Making a simple script standalone
References: <5d1084-5j7.ln1@whisper.very.softly> <45AD6442.6050209@websafe.com>
Message-ID: <io8284-od9.ln1@whisper.very.softly>

On Wednesday 17 January 2007 00:48, Larry Bates wrote:

>> There is nothing graphical, nothing fancy about the script.
>> The only imports are: os, stat, string and time.
>> 
>> Any suggestions on an - easy and clear - path to follow ?

> I use py2exe and inno installer.  Works great.
Thanks, I will look into it.
Hope it's not as heavy as py2exe...
-- 
Research is what I'm doing, when I don't know what I'm doing.
(von Braun)



From martin at v.loewis.de  Wed Jan  3 14:57:53 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 03 Jan 2007 20:57:53 +0100
Subject: Cannot build 2.5 on FC6 x86
In-Reply-To: <502e72F1eh7ngU1@mid.individual.net>
References: <502e72F1eh7ngU1@mid.individual.net>
Message-ID: <459c0ac1$0$28366$9b622d9e@news.freenet.de>

Paul Watson schrieb:
> ./configure
> make
> make test
> 
> The result appears to hang after the test_tkl... line.  I had to kill
> the 'make test' process which terminated it.  Any suggestions?

There isn't (or shouldn't be) any "test_tkl..." line. What precisely
was the line, and how long did you wait until you thought it hangs?

Regards,
Martin


From paul at boddie.org.uk  Mon Jan 15 11:02:10 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 15 Jan 2007 08:02:10 -0800
Subject: check if there is data in stdin without blocking
References: <4PMqh.47441$X97.9536@newsfe18.lga>
	<uhNqh.47996$X97.358@newsfe18.lga>
Message-ID: <1168876929.239494.93830@v45g2000cwv.googlegroups.com>

hg wrote:
> import select

[...]

>   File "/home/philippe/Desktop/select.py", line 4, in ?

Consider which module Python is trying to import here: the standard
library select module or your own program?

Paul



From Laurent.LAFFONT-ST at adixen.fr  Mon Jan 15 05:52:19 2007
From: Laurent.LAFFONT-ST at adixen.fr (Laurent.LAFFONT-ST at adixen.fr)
Date: Mon, 15 Jan 2007 11:52:19 +0100
Subject: Class list of a module
Message-ID: <OF0E7158E8.BCC9D6AC-ONC1257264.003B56C2-C1257264.003B7D48@an.cit.alcatel.fr>

> Looks rather simple to me... Anyway, you could avoid calling getattr
> twice, if you iterate over vars(aModule).itervalues()

> def getClassList(aModule):
>     return [cls for cls in vars(aModule).itervalues()
>     if inspect.isclass(cls)]

> (And note that there is no need for using \ at the line ends, because
> of the [])


That's what I've been looking for. Thank you.

Regards, 

Laurent Laffont 




From nospam at nospam.com  Tue Jan  9 23:42:48 2007
From: nospam at nospam.com (Mark T)
Date: Tue, 9 Jan 2007 20:42:48 -0800
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5 (Final  report)
References: <2BBAEE949D384D40A2B851287ADB6A4304595A6D@eugsrv400.psc.pscnet.com>
	<mailman.2505.1168387540.32031.python-list@python.org>
Message-ID: <9JednRBqruZ18znYnZ2dnUVZ_sadnZ2d@comcast.com>


"Gabriel Genellina" <gagsl-py at yahoo.com.ar> wrote in message 
news:mailman.2505.1168387540.32031.python-list at python.org...
> At Tuesday 9/1/2007 20:31, Carroll, Barry wrote:
>
>>I've spent about a day investigating our "too many open files" error.  I
>>found the following:
>>
>>         1. Windows XP allows a Python 2.5 script to open 509 concurrent
>>            files.
>
> And do you actually need so many open files simultaneously?
> Try to close them explicitely when you finish working on them - do not 
> rely on GC for closing files. This has *always* been the recomended 
> practice (except maybe, inside a short script that finishes quickly).
> On Python 2.5 you can use the new `with` statement.
>
>
> -- 
> Gabriel Genellina
> Softlab SRL

After a quick scan of this thread, I didn't see the actual source for your 
call to the file's close().  Is it perhaps "file.close" and not 
"file.close()"?  Forgotten parentheses won't give an error and won't close 
the file.

>>> f=file('blah.txt','wt')
>>> f
<open file 'blah.txt', mode 'wt' at 0x00ECB9F8>
>>> f.close
<built-in method close of file object at 0x00ECB9F8>
>>> f
<open file 'blah.txt', mode 'wt' at 0x00ECB9F8>
>>> f.close()
>>> f
<closed file 'blah.txt', mode 'wt' at 0x00ECB9F8>
>>>

-Mark Tolonen



From cfbolz at gmx.de  Mon Jan 22 06:05:07 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Mon, 22 Jan 2007 12:05:07 +0100
Subject: Py 2.5 on Language Shootout
In-Reply-To: <624934630701211513t3a3e28a5ua7387c9ee2f5790e@mail.gmail.com>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>	<1169275613.093797.67320@v45g2000cwv.googlegroups.com>	<45B23400.2010906@gmx.de>	<mailman.2944.1169309208.32031.python-list@python.org>	<1169321686.025356.120340@s34g2000cwa.googlegroups.com>	<mailman.2951.1169329048.32031.python-list@python.org>	<1169331552.918850.282920@a75g2000cwd.googlegroups.com>
	<624934630701211513t3a3e28a5ua7387c9ee2f5790e@mail.gmail.com>
Message-ID: <45B49A63.9000601@gmx.de>

Ramon Diaz-Uriarte wrote:
 >> In England the corresponding expression is "Counting Angels on a
 >> Pinhead"
 >> http://dannyayers.com/2001/misc/angels.htm
 >>
 >
 > Thanks, that is neat. I find the discussion on the sex of the angels,
 > well, sexier. But we are probably a few hundred years late to start a
 > catholic-protestant religious war here :-).
 >
NOBODY expects the Spanish Inquisition! Our chief weapon is
surprise...surprise and fear...fear and surprise.


From facundo at taniquetil.com.ar  Thu Jan 11 15:14:13 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Thu, 11 Jan 2007 20:14:13 +0000 (UTC)
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
Message-ID: <eo65qk$bsr$1@sea.gmane.org>

Noud Aldenhoven wrote:


> When I was programming in a mathematical project I began to wonder if python
> supports rational numbers[1]. In a language like magma[2] it's not such a
> problem. Does python supports something simular?

Python does not have rational numbers.

There's a (rejected) PEP about this, PEP-239:

  http://www.python.org/dev/peps/pep-0239/

Maybe you also want to read the section "Why not rational?" of
PEP-327...

  http://www.python.org/dev/peps/pep-0327/#why-not-rational

...and even take a look to gmpy:

  http://gmpy.sourceforge.net/


Question: Why do you say that it's a problem?

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From simon at brunningonline.net  Fri Jan 12 15:22:04 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 12 Jan 2007 20:22:04 +0000
Subject: dynamic argument name for functions
In-Reply-To: <e04d2e90701121217w32829ef9g4bd0af00b643dc2c@mail.gmail.com>
References: <e04d2e90701121217w32829ef9g4bd0af00b643dc2c@mail.gmail.com>
Message-ID: <8c7f10c60701121222p2187225fn3e0559388a83a16e@mail.gmail.com>

On 1/12/07, mark <rkmr.em at gmail.com> wrote:
> I want to pass a value to an argument of a function. The argument name is
> dynamic and is stored in a
>  variable. How do I call the function using with arg_name and value as the
> parameters.
>  thanks
>  mark
>
>  For ex:
>  def function(arg1='None', arg2='None', arg3='None'):
>        print arg1
>        print arg2
>        print arg3
>
>
>  arg_name = 'arg1'
>  arg_value = 'i am passing a value to argument 1'
>  function(???????)

Untested:

function(**{arg_name: arg_value})

-- 
Cheers,
Simon B
simon at brunningonline.net


From python.technofreak at gmail.com  Fri Jan 19 22:44:07 2007
From: python.technofreak at gmail.com (Parthan SR)
Date: Sat, 20 Jan 2007 09:14:07 +0530
Subject: **argv can't work
In-Reply-To: <fbe35f750701191920g4c28e44bjee5789ff346223b7@mail.gmail.com>
References: <fbe35f750701191920g4c28e44bjee5789ff346223b7@mail.gmail.com>
Message-ID: <9d6d3deb0701191944k604a6ff8u3cea7c88cbe45f04@mail.gmail.com>

On 1/20/07, Jm lists <practicalperl at gmail.com> wrote:
>
> hello members,
>
> See my script piece below:
>
> def testB(shift,**argv):
>     print "first argument is %s" %shift
>     print "all other arguments are:",argv
>
> testB('mails','Jen','Jen at att.com','Joe','Joe at aol.com')
>
> It can't work at all.please help tell me the reasons.thanks.
>
>
It works for me, check this one :

>>> def argtst(x, **y):
...     print "first arument is %s" % x
...     print "other arguments are", y
...
>>> argtst(x=10,a=1,b=2,c=3)
first arument is 10
other arguments are {'a': 1, 'c': 3, 'b': 2}


(!) : Do not use the name 'argv' for the second argument.

-- 
With Regards,

TechnoFreak
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070120/35a8afb3/attachment.html>

From martin at v.loewis.de  Mon Jan 29 16:17:13 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 29 Jan 2007 22:17:13 +0100
Subject: Compiling extension with Visual C++ Toolkit Compiler - MSVCR80.dll
In-Reply-To: <1170103633.189538.216620@v45g2000cwv.googlegroups.com>
References: <1170103633.189538.216620@v45g2000cwv.googlegroups.com>
Message-ID: <45BE6459.7050303@v.loewis.de>

alexandre_irrthum at yahoo.com schrieb:
> The library seems to build correctly (producing Polygon.py and 
> cPolygon.pyd), but when I import it I get the following message from 
> python.exe: "This application has failed to start because MSVCR80.dll 
> was not found". I thought that this might be due to Python trying to 
> link against  the .dll from Microsoft Visual C++ Express 2005, also 
> installed on my PC, instead of MSVCR71.dll. So I've removed MS Visual C
> ++ Express 2005, and any trace of it from my environment variables, 
> but that doesn't seem to change anything.
> 
> Any help would be greatly appreciated.

Can you find out where msvcrt.lib comes from? If you manage to copy
the linker command line, I think link.exe has a way of telling you
where it picked up the file. If that won't work, and you find multiple
copies of msvcrt.lib on your disk, you can use dumpbin /all on
each of them to find out which one is right.

Regards,
Martin


From Anders+news at Arnholm.nu  Tue Jan 23 08:13:49 2007
From: Anders+news at Arnholm.nu (Anders Arnholm)
Date: Tue, 23 Jan 2007 14:13:49 +0100
Subject: Getting to an SSH account over a HTTP proxy
References: <mailman.2985.1169469575.32031.python-list@python.org>
	<51jt71F1k884hU1@mid.uni-berlin.de>
	<slrnera43v.tcj.grahn+nntp@frailea.sa.invalid>
Message-ID: <slrnerc2gd.ufh.Anders+news@tika.arnholm.se>

Jorgen Grahn <grahn+nntp at snipabacken.dyndns.org> skriver:
> I am pretty sure there is. Or at least TCP-over-HTTP, or IP-over-HTTP. An
> acquaintance of mine used it to tonnel home through a corporate firewall. I
> think -- I didn't want to know the details.

Ypu can tunnel ip over anything. (Even email if you like...) Nu tunnel
out from that company was based on http-proxy. A small program called
connect (the final version I used was by Shun-ichi Goto and under
GPL.) Bascilly it makes a http-proxt connect to an other site (my sshd)
Then using sshd and pppd as program inte other end makes a good way to
tunnel IP also :-)

/ Anders
-- 
http://anders.arnholm.nu/			     Keep on Balping


From paddy3118 at netscape.net  Wed Jan 31 13:09:53 2007
From: paddy3118 at netscape.net (Paddy)
Date: 31 Jan 2007 10:09:53 -0800
Subject: Sorting a List of Lists
In-Reply-To: <45c08cd3$0$22805$426a74cc@news.free.fr>
References: <1170201351.881776.257790@q2g2000cwa.googlegroups.com>
	<45c08cd3$0$22805$426a74cc@news.free.fr>
Message-ID: <1170266993.041224.75990@a34g2000cwb.googlegroups.com>

On Jan 31, 12:35 pm, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> apoth... at gmail.com a ?crit :
>
> > I can't seem to get this nailed down and I thought I'd toss it out
> > there as, by gosh, its got to be something simple I'm missing.
>
> > I have two different database tables of events that use different
> > schemas. I am using python to collate these records for display. I do
> > this by creating a list of lists that look roughly like this:
>
> > events = [['Event URL as String', 'Event Title as String ', Event Date
> > as Datetime], ...]
>
> Then you should not use a list of lists, but a list of tuples.
>
>
>
> > I then thought I'd just go events.sort(lambda x,y: x[2]<y[2]) and call
> > it a day. That didn't work. But then lamda functions like to be very
> > simple, maybe object subscripts aren't allowed (even though I didn't
> > get an error). So I wrote a comparison function that looks much as you
> > would expect:
>
> > def date_compare(list1,
> > list2):
> >     x = list1[2]
> >     y = list2[2]
> >     if
> > x>y:
> >         return
> > 1
> >     elif
> > x==y:
> >         return
> > 0
> >     else: #
> > x<y
> >         return -1
>
> > But as before sorting with this function returns None.
>
> > What have I overlooked?
>
> Lol.
>
> I guess this is a FAQ. list.sort() performs a destructive in-place sort,
> and always return None. This is in the FineManual:
>
> bruno at bruno:~$ python
> Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02)
> [GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> help(list.sort)
> Help on method_descriptor:
>
> sort(...)
>      L.sort(cmp=None, key=None, reverse=False) -- stable sort *IN PLACE*;
>      cmp(x, y) -> -1, 0, 1
>
> You may want to use sorted(iterable, cmp=None, key=None, reverse=False)
> if you don't want to sort in-place.
>
> Also, using comparison functions is usually not the most efficient way
> to do such a sort. In your case, I'd go for a good old
> Decorate/sort/undecorate (AKA schwarzian transform):
>
> events = [evt for date, evt in
>            sorted([(evt[2], evt) for evt in events])]
>
> HTH

I agree with you B., but see the comments here:
  http://www.biais.org/blog/index.php/2007/01/28/23-python-sorting-
efficiency
for information on the relative speeds of rolling your own DSU versus
using itemgetter and key=...

- Paddy.




From vgvr620034 at gmail.com  Tue Jan 30 04:36:15 2007
From: vgvr620034 at gmail.com (raghu)
Date: 30 Jan 2007 01:36:15 -0800
Subject: Diff between opening files in 'r' and 'r+' mode
Message-ID: <1170149775.253373.318960@q2g2000cwa.googlegroups.com>

i want to know the difference between 'r' mode and 'r+' mode
1.i = open('c:\python25\integer.txt','w')-------->for writiing
  i.write('hai')--------->written some content in text file
  i = open('c:\python25\integer.txt','r')---->for reading
  print i.read()---->for printing the contents in that text file
  i = open('c:\python25\integer.txt','w')---------->for writing
  i.write('how')-----------?Rewrite the contents
  print i.read()
[MY QUESTION]:i want to read the text file contents cant it be done by 
giving (print i.read())?
Before going to next question [I deleted all the contents in the text 
file]

2.i = open('c:\python25\integer.txt','r+')-----For reading and writing
   i.write('hai')--------->written some content  to text file
   print i.read()--------->
{?
?
('c:\python25\integer.txt','w')
                               i write('')
                               print i.read()how')
                               i = open('c:\python25\integer.txt','r')
                               print i.read()
                               i = open('c:\python25\integer.txt','w')
                               i.write()
                               i = open('c:\python25\integer.txt','r')
                              print i.read() } --->Thats what i saw on 
interpreter(In curly braces) when  i ran the script
[MY QUESTION]:1.from where the above in curly braces is printed?and i 
have written only 'hai' to the text file
                          2.Should i recall again the opening of the 
file in 'r' mode to read the file?



From tundra at tundraware.com  Wed Jan 31 12:07:47 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Wed, 31 Jan 2007 11:07:47 -0600
Subject: What is the dummy statement that do nothing in Python?
In-Reply-To: <epqhre$qtp$1@netnews.upenn.edu>
References: <epqhre$qtp$1@netnews.upenn.edu>
Message-ID: <45C0CCE3.2080601@tundraware.com>

Dongsheng Ruan wrote:
> I remember that in python there is some kind of dummy statement that just 
> holds space and does nothing.
> 
> I want it to hold the place after a something like if a>b: do nothing
> 
> I can't just leave the space blank after if statement because there will be 
> error message.
> 
> Does anybody know what to insert there?
> 
> Thanks! 
> 
> 

if a > b:
    pass




From horpner at yahoo.com  Thu Jan 25 09:02:54 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 25 Jan 2007 14:02:54 GMT
Subject: Please have a look at this class
References: <1169735908.009109.7460@a75g2000cwd.googlegroups.com>
Message-ID: <slrnerhhdr.1f8.horpner@FIAD06.norwich.edu>

On 2007-01-25, antred <NutJob at gmx.net> wrote:
> While working on a program I encountered a situation where I'd
> construct a largish data structure (a tree) from parsing a host
> of files and would end up having to throw away parts of my
> newly built tree if a file turned out to contain invalid data.

The first idea that occurs to me is to provide a merge function
for your data structure, which you use to merge in another tree
object when that data is known to be valid.

So the process would work like this:

 temp_tree = process(the_file)
 if temp_tree.is_valid():
   real_tree.merge(temp_tree)

><CODE SNIPPET>
>
> u = Unrollable()
> u.someValue = 3.14
> u.aString = 'Hi there'
>
> # If we decide we want to keep those changes ...
> u.commit()
>
> # Or we could have reverted to the original. This would have restored
> the state prior to the last call to commit() (or simply the
> state at the beginning, if there hasn't been a call to commit
> yet).
> #u.rollback()
>
></CODE SNIPPET>
>
> The basic idea behind this is that each instance of the
> Unrollable class keeps an internal dictionary (which, in lieu
> of a better name I'm currently calling 'sand box') to which all
> changed attribute values are saved (attribute changes are
> intercepted via __setattr__). Then, with a call to commit(),
> all attributes are transferred to the instance's __dict__
> dictionary and hence become actual attributes per se.

A nice use for this class might be to pass large mutable objects
to a functions as if it were immutable without needing to copy
them. Unfortunately it only works for one level of call. I think.

-- 
Neil Cerutti

-- 
Posted via a free Usenet account from http://www.teranews.com



From postbox.holger at gmx.net  Thu Jan 11 11:11:27 2007
From: postbox.holger at gmx.net (Holger)
Date: Thu, 11 Jan 2007 17:11:27 +0100
Subject: Frequency spectrum with fft of a real valued array...?
Message-ID: <op.tlzy9djzu6qnye@krings>



Dear all,

I need to do a FFT on an array of 20k real values. Origin of the sampled  
data is a sinus wave with light harmonics.
The goal is an frequency spectrum with the magnitudes of the first 50.  
harmonics.

I addressed python like:

	test_arr = src_data_dict[ channel ][0:19599]
	target_data_dict[ channel ] = FFT.fft(test_arr,n=50,axis=-1)

This results in an array of complex values but with unexpected big  
coefficients...
(much higher than the original signal magnitudes)
How do I get the absolute magnitudes of the harmonics, which are much  
lower than the
resulting absolute values of the coefficients?

The result should be like this:

1.harmonic (50 Hz)		1,0
2.harmonic (100 Hz)	0,01
3.harmonic (100 Hz)	0,08
4.harmonic (100 Hz)	0,0035
etc.


at the moment I get a resulting array like:

CH1
(1729.80103418+0j)
(366.689810532+19.5196963754j)
(370.688444025+32.162562652j)
(372.122246668+46.9545880507j)
(379.273599053+59.0724599622j)
(369.889589421+75.9247281559j)
(381.070551892+99.07345873j)
(378.800462354+106.761629308j)
(375.014128346+131.34177586j)
(389.110601354+149.320740829j)
(389.23247472+158.909042086j)
(398.875237165+197.86980788j)
(397.927158223+196.858459101j)
(402.455325066+234.651276425j)
(411.599088579+256.32156894j)
(414.469935576+254.512014918j)
(417.198515262+291.400509132j)
(426.745545674+320.769421334j)
(433.987466212+321.929780157j)
(446.124386798+350.810581686j)
(455.876025379+383.099789898j)
(458.083277747+405.592129477j)
(470.908512117+433.929598454j)
(482.083855098+468.256188814j)

What does it mean to me? How do I get to the wanted frequenca spectrum???
..

btw The maximum magnitudes of the original data are app. 70 peak

Thanks in advance for your help!!!

Regards Holger


From gandalf at designaproduct.biz  Fri Jan  5 11:40:45 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Fri, 05 Jan 2007 17:40:45 +0100
Subject: importing / loading a module / class dynamically
In-Reply-To: <o1vnh.281$rv1.88@newsfe21.lga>
References: <o1vnh.281$rv1.88@newsfe21.lga>
Message-ID: <459E7F8D.3040302@designaproduct.biz>


> .../.../../plugin/name1/name1.py
> ....
> .../.../../plugin/namen/namen.py
>
>
> I block at the beginning and tried this (test.py is a real file)
>   
>>>> s = 'test.py'
>>>> eval ('import ' + s)
>>>>         
import test.py  # This is invalid
import test # This MAY be valid
import name1.name1 # Most probably this is what you want if you have the 
aforementioned directory stucture
from name1 import name1 # Or this?

You must also:

1. Have the 'plugin' dir in your sys.path
2. Have at least an empty plugin/name1/__init__.py file

Another alternative is to have plugins/__init__.py and do something like:

from plugins.name1 import name1

You should not overcomplicate things anyway. If you do not need these 
name1...namen directories for sure, then just drop them.

Hint: try this (untested)

import os
fnames = os.listdir('plugins')
for fname in fnames:
    if os.path.isdir(fname):
       root,ext = os.path.splitext(fname)
       cmd = "from plugins.%s import %s" % (root,root)
       print "I should eval this:",cmd

Best,

   Laszlo


> Traceback (most recent call last):
>   File "<pyshell#1>", line 1, in -toplevel-
>     eval ('import ' + s)
>   File "<string>", line 1
>     import test.py
>   



From practicalperl at gmail.com  Sat Jan 20 04:30:24 2007
From: practicalperl at gmail.com (Jm lists)
Date: Sat, 20 Jan 2007 17:30:24 +0800
Subject: Does eval has the same features as Perl's?
Message-ID: <fbe35f750701200130w1272313bv61b7a3ff8c07c1e7@mail.gmail.com>

Hello members,

I want to know does the "eval" in python have the same features as in
Perl (capture errors)?

For example,in perl I can wrote:

$re = eval { 1 / 0 };

Though 1/0 is a fatal error but since it's in "eval" block so the perl
interpreter doesn't get exit.

Thanks again.


From bborcic at gmail.com  Wed Jan 24 06:08:58 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Wed, 24 Jan 2007 12:08:58 +0100
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <1169582795.882496.209750@a75g2000cwd.googlegroups.com>
References: <45b6231b$1_2@news.bluewin.ch>
	<1169582795.882496.209750@a75g2000cwd.googlegroups.com>
Message-ID: <ep7epg$5d5$1@sea.gmane.org>

imageguy wrote:
> 
> I was looking for ( and still am searching for) similiar functionality.
>  Specifically I would like to be able to capture a small area of the
> screen (a number or a code) and convert this to text that can be used
> in my application.

There is a windows executable version of gnu ocr at 
http://jocr.sourceforge.net/download.html that (in combination with screen 
capture capability that pywinauto distributes) sort of can do that. An issue is 
that it's not exceedingly accurate, for instance it recognizes "2" as "1" (in 
the font that er, counts for me). I could probably manage such imprecisions but 
I would rather have an exact solution.
...
> 
> I work with wxPython and Win32 applications exclusively.
> 
> So if I can be of any help or assistance, please let me know.
> 
> Geoff.
> 

Thanks for the offer, I will keep it in mind,

Boris Borcic



From tundra at tundraware.com  Mon Jan  8 12:36:58 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Mon, 08 Jan 2007 11:36:58 -0600
Subject: Walking The Right Path
In-Reply-To: <entu38$kjn$00$1@news.t-online.com>
References: <ghe974-gau2.ln1@eskimo.tundraware.com>
	<entu38$kjn$00$1@news.t-online.com>
Message-ID: <s2ca74-v66.ln1@eskimo.tundraware.com>

Peter Otten wrote:
> Tim Daneliuk wrote:
> 
>> IOW, is there a way to return a symlink-based path which contains
>> the symlink pointer as is was *defined* not as it expands?
> 
> os.readlink()
> 
> Peter

Thanks - I couldn't find it because it was right in front of my nose :)


-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From nospam at riddergarn.dk  Sun Jan 28 06:10:46 2007
From: nospam at riddergarn.dk (Scripter47)
Date: Sun, 28 Jan 2007 12:10:46 +0100
Subject: Array delete 
Message-ID: <45BC84B6.9080505@riddergarn.dk>

Hey,

Can someone plz make a function for that takes a array, and then search 
in it for duplicates, if it finds 2 or more items thats the same string 
then delete all except 1.

Short: it deletes all duplicates in a array

thanks



From rweth at cisco.com  Sat Jan  6 15:38:05 2007
From: rweth at cisco.com (rweth)
Date: Sat, 06 Jan 2007 12:38:05 -0800
Subject: nntplib downloads content with extra linebreaks
In-Reply-To: <enouja$k9m$1@minji.szn.dk>
References: <1168110213.436860@sj-nntpcache-1.cisco.com>
	<enosln$hn6$1@minji.szn.dk>
	<1168112276.194982@sj-nntpcache-1.cisco.com>
	<enouja$k9m$1@minji.szn.dk>
Message-ID: <1168115885.739704@sj-nntpcache-1.cisco.com>

Klaus Alexander Seistrup wrote:
> Rweth wrote:
> 
>>    for aline in buf:
>>       bufHeal.append(aline.replace('\r\n', '\n'))
> 
> What does one single aline look like?
> 
>> s.body(id,afile)
> 
> Does the 'afile' contain a filename or a filepointer?
> 
> Cheers,
> 
so afile contains a filename.
One single aline looks like so:
   '</rme:SoftwareIdentity>'




From jan.m.danielsson at gmail.com  Tue Jan 23 00:17:15 2007
From: jan.m.danielsson at gmail.com (Jan Danielsson)
Date: Tue, 23 Jan 2007 06:17:15 +0100
Subject: Removing outdated files
Message-ID: <45b59949@griseus.its.uu.se>

Hello all,

   I have a backup system which produces files using the following pattern:

   <basename>.<date>.<extension>

   For instance:

   documents.2007-01-01.tar.bz2.gpg
   documents.2007-01-02.tar.bz2.gpg
   .
   .
   .
   system_files.2007-01-01.tar.bz2.gpg
   system_files.2007-01-02.tar.bz2.gpg
   .
   .
   .
   etc.

   Obviously, I have little need for *all* those files. What I want to
do is to delete old files according to this pattern:

   - Keep all backup files which are two weeks, or less, old
   - If backups are more than two weeks old, then keep only the latest
one for each week.
   - If backups are more than two months old, then keep only the latest
one for each month.
   - If backups are more than two years old, then keep only the latest
one for each year.

   I have generated a list of files, parsed the date from the entries,
and created date object from them. I have a list where I have grouped
the "basenames" together. I.e. (lists in a list):

documents
	2007-01-01
	2007-01-02
	.
	.
	.
system_files
	2007-01-01
	2007-01-02
	.
	.
	.

   Now all I have to do is iterate through the date-lists for each of
the basenames, and apply the rules! Well..

   How does one group by week, for instance? I'd like to create a new
set of lists which looks like this:

   basename:documents
      week:01
        2007-01-01
        2007-01-02
      week:02
        2007-01-07
        2007-01-08

   Date-grouping is dead easy in SQL, but I don't feel like resorting to
postgresql just for this. :-)

   I've been looking at the datetime.date class, but I can't see any
easy way to parse the week number from it. I could calculate this
information by brute force -- but I get a feeling that there are
functions in Python to extract week numbers from a date.

-- 
Kind regards,
Jan Danielsson
------------ And now a word from our sponsor ------------------
For a quality usenet news server, try DNEWS, easy to install,
fast, efficient and reliable. For home servers or carrier class
installations with millions of users it will allow you to grow!
----  See http://netwinsite.com/sponsor/sponsor_dnews.htm  ----


From anton.hartl at gmail.com  Tue Jan 16 11:15:54 2007
From: anton.hartl at gmail.com (Anton Hartl)
Date: Tue, 16 Jan 2007 16:15:54 +0000 (UTC)
Subject: Segfault with tktreectrl on python-2.5 on linux
References: <1168884154.116074.308720@s34g2000cwa.googlegroups.com>
	<slrneqnlqh.1hks.ah@hugin-home1.muc.de>
	<1168941826.062298.229080@51g2000cwl.googlegroups.com>
Message-ID: <slrneqpuhl.rh.ah@hugin-home1.muc.de>

On 2007-01-16, klappnase <klappnase at web.de> wrote:

>> Solutions:
>>
>>     a) convince Python developers to prefix ALL new (wrt. 2.5)
>>        global symbols with a prefix like "_PyAST_" or equivalent;
>>        this would be consistent with how it is done anyway,
>>        unfortunately the new AST symbols deviate from this practise
>>        (there are symbols like "Assert", "If", "Then", ...)
>>
>>  or b) apply an equivalent rule to the global symbols in
>>        tktreectrl that are global by accident, i.e. because
>>        of the way the library is structured and built
>>
>
> Anton, you're cool,

Well :) understanding this bug required a looong stare at the
gdb stacktrace and a short experiment with loading shared libraries
to verify my understanding with a simple example.

>
> actually renaming Ellipsis to Py_Ast_Ellipsis in ast.c and Python-ast.c
> seems to fix this.

Alternatively renaming Ellipsis to TkTc_Ellipsis in tktreectrl
works too;  that's what I did :)

> What I don't understand, isn't it very likely that such things will
> happen when names like "Ellipsis" or "Slice" and "Index" (which I also
> found in Python-ast.c) are being used, or are the treectrl people doing
> something they should avoid?

IMHO global symbols that do not actually have any use outside
the respective library should follow a naming convention that
minimizes the probablity of name clashes like this.  I.e. both
the new AST symbols in Python 2.5 and the global symbols in
tktreectrl should be prefixed appropriately.

> I think the answer to this might be important when deciding to whom I
> should send a bug report :)

The bug report should go to both;  I actually contacted Jeremy Hylton
as a main contributor of the new AST code two weeks ago but didn't
get any response.

Regards,
    Anton

PS
Thanks for your work on TkinterTreectrl!


From bearophileHUGS at lycos.com  Sat Jan 20 05:53:47 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 20 Jan 2007 02:53:47 -0800
Subject: Py 2.5 on Language Shootout
In-Reply-To: <1169275613.093797.67320@v45g2000cwv.googlegroups.com>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>
	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>
	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>
	<1169275613.093797.67320@v45g2000cwv.googlegroups.com>
Message-ID: <1169290427.621392.173490@38g2000cwa.googlegroups.com>

pgarrone at acay.com.au:
> In reality the choice would be C++ because of OO and STL.

I have seen that when Python+Psyco are too much slow, D language is a
good sweet half point between Python and C++ :-) Fast as C++ and with a
simpler syntax and semantics (Pyrex isn't bad, but D gives high-level
things at higher speed). And in the future ShedSkin and RPython may
become options too.

Bye,
bearophile



From kylotan at gmail.com  Tue Jan  2 11:58:58 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 2 Jan 2007 08:58:58 -0800
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <mailman.2205.1167751490.32031.python-list@python.org>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
	<mailman.2205.1167751490.32031.python-list@python.org>
Message-ID: <1167757137.942280.32270@42g2000cwt.googlegroups.com>

Gabriel Genellina wrote:

> At Saturday 30/12/2006 21:55, Ben Sizer wrote:
>
> >python setup.py install
> >
> >On Unix, you'd run this command from a shell prompt; on Windows, you
> >have to open a command prompt window (``DOS box'') and do it there; "
> >
> >Pretty much none of the instructions in that part of the docs will work
> >without you altering your path beforehand. Python's cross-platform
> >nature means people rightly expect the same instructions to work on
> >Linux and Windows from a standard installation. Right now, they don't.
>
> Notice that there is NO need to alter the system path. You just have
> to tell Windows where python.exe resides; there is a per-application
> path located at
> HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths.
> In order to launch Python just writing "python" at the command
> prompt, the installer should -instead of playing with the system
> path- create a new key below App Paths, named "python.exe", and set
> its default value to the full path of the installed python executable.
> See
> http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/programmersguide/shell_basics/shell_basics_extending/fileassociations/fa_perceived_types.asp

>From what I can tell, that is solely for file associations. If so, it
will work if you type "setup.py install" but not if you type "python
setup.py install". For instance, I have an entry for Firefox in that
part of the registry, but if you try executing "firefox" at the command
line, it fails.

It also doesn't solve the issue of utility scripts being added to
Python's scripts directory.

-- 
Ben Sizer



From beliavsky at aol.com  Fri Jan  5 21:20:50 2007
From: beliavsky at aol.com (Beliavsky)
Date: 5 Jan 2007 18:20:50 -0800
Subject: Dividing integers...Convert to float first?
In-Reply-To: <mailman.2337.1168019188.32031.python-list@python.org>
References: <1168017342.255981.134400@11g2000cwr.googlegroups.com>
	<459E8B5C.6020804@gmx.net> <459E8C77.3020603@rpath.com>
	<mailman.2337.1168019188.32031.python-list@python.org>
Message-ID: <1168050050.353467.185040@s80g2000cwa.googlegroups.com>


Thomas Ploch wrote:
> Jonathan Smith schrieb:
> > Thomas Ploch wrote:
> >> redefined.horizons at gmail.com schrieb:
> >>> I'm still pretty new to Python. I'm writing a function that accepts
> >>> thre integers as arguments. I need to divide the first integer by te
> >>> second integer, and get a float as a result. I don't want the caller of
> >>> the function to have to pass floats instead of integers. How do I
> >>> convert the arguments passed to the function into floats before I do
> >>> the division? Is this necessary, or is their a better way?
> >>>
> >>> Thanks,
> >>>
> >>> Scott Huey
> >>>
> >>
> >> Yes, it is necessary. If you divide two integers, the result will be an
> >> integer.
> >>
> >>  >>> 1/2
> >>  0
> >>
> >> You need the function float() -> float because a division between
> >> integers and floats will have floats as their results
> >>
> >>  >>> float(1)/2
> >>  0.5
> >
> >
> >>>> from __future__ import division
> >>>> 1/2
> > 0.5
> >
> > -smithj
> >
>
> aahh, I have been tought so many things about python that are actually
> so old, that I am starting to feel embarrassed.
>
> That brings me to the point, that learning a language X at university
> always brings you to a point where you know (almost) everything, but in
> reality know nothing because course material is too old...

If you learned C or Fortran 10 years ago, the constructs you learned
still have the same meaning, even though new features have been added
in C99 or Fortran 95. Mr. van Rossum  appears to value backwards
compatibility less than the C or Fortran standards committees do,
although I am sure he is introducing incompatibilities only after
serious consideration. If the C or Fortran committees tried to change
the meaning of int/int, they would be shot.

If you want to be confident that your code will run, unchanged, 10
years from now on the hardware and OS that will then be common, Python
2.x is not the language to use, unfortunately. From what I have read,
Python 3 will break things more fundamental than int/int.



From anil.jupiter9 at gmail.com  Mon Jan 29 08:55:33 2007
From: anil.jupiter9 at gmail.com (jupiter)
Date: 29 Jan 2007 05:55:33 -0800
Subject: Conversion of string to integer
Message-ID: <1170078933.180025.229830@k78g2000cwa.googlegroups.com>

Hi guys,

I have a problem. I have a list which contains strings and numeric. 
What I want is to compare them in loop, ignore string and create 
another list of numeric values.

I tried int() and decimal() but without success.

eq of problem is

#hs=string.split(hs)
hs =["popopopopop","254.25","pojdjdkjdhhjdccc","25452.25"]

j=0
    for o in range(len(hs)):
        print hs[o],o
        p=Decimal(hs[o])
        if p > 200: j+=j
        print "-"*5,j
    print "*"*25

I could be the best way to solve this ......?


@nil



From gagsl-py at yahoo.com.ar  Sun Jan  7 13:06:46 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 10:06:46 -0800
Subject: strange for loop construct
In-Reply-To: <12ptf5bl21f2teb@corp.supernews.com>
References: <1168029548.217679.251230@q40g2000cwq.googlegroups.com>
	<mailman.2347.1168030198.32031.python-list@python.org>
	<12ptf5bl21f2teb@corp.supernews.com>
Message-ID: <1168193206.598957.257700@38g2000cwa.googlegroups.com>

Mark Elston ha escrito:

> If you have a Python installation you should be able to find the
> "Whats New" section of the docs.  List comprehensions are described
> pretty well in the "What's new in Python 2.0?" section.  This gives
> some simple examples as well as the rationale behind them.

Where do you find the "What's new" for previous releases? I have to
read them online.

-- 
Gabriel Genellina



From jfabiani at yolo.com  Thu Jan 11 16:05:56 2007
From: jfabiani at yolo.com (johnf)
Date: Thu, 11 Jan 2007 13:05:56 -0800
Subject: Learning Python book, new edition?
References: <mailman.2587.1168537482.32031.python-list@python.org>
Message-ID: <vGxph.19$0v5.2@newsfe04.lga>

Demel, Jeff wrote:

> This email is intended only for the individual or entity to which it is
> addressed. ?This email may contain information that is privileged,
> confidential or otherwise protected from disclosure. Dissemination,
> distribution or copying of this e-mail or any attachments by anyone other
> than the intended recipient, or an employee or agent responsible for
> delivering the message to the intended recipient, is prohibited. If you
> are not the intended recipient of this message or the employee or agent
> responsible for delivery of this email to the intended recipient, please
> notify the sender by replying to this message and then delete it from your
> system. ?Any use, dissemination, distribution, or reproduction of this
> message by unintended recipients is strictly prohibited and may be
> unlawful.

So what happens with google bots etc... Information provided in the email
could be helpful to others that are NOT the original recipient.  And what
happens to the archive stuff?

John


From huayang.xia at gmail.com  Thu Jan  4 16:42:42 2007
From: huayang.xia at gmail.com (Huayang Xia)
Date: 4 Jan 2007 13:42:42 -0800
Subject: subclassing a module: misleading(?) error message
In-Reply-To: <459d687a$1@nntp.zianet.com>
References: <459d687a$1@nntp.zianet.com>
Message-ID: <1167946962.471424.47780@42g2000cwt.googlegroups.com>

So you know you are subclassing a module.

There is an answer @
http://www.velocityreviews.com/forums/showpost.php?p=1819038&postcount=2

On Jan 4, 3:49 pm, "Erik Johnson" <ej at somewhere.com> wrote:
> I ran into a problem I didn't understand at first. I got part of it figured
> out. Let me first demonstrate the original problem:
>
> > cat Super.pyclass Super(object):
>     def __init__(self):
>         self._class = 'Super'
>     def hello(self):
>         print "%s says 'Hello'" % self._class
>
> > cat Sub.pyimport Super
>
> class Sub(Super):
>     def __init__(self):
>         self._class = 'Sub'
>
> > pythonPython 2.3.4 (#1, Feb  7 2005, 15:50:45)
> [GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> from Super import Super
> >>> from Sub import SubTraceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "Sub.py", line 4, in ?
>     class Sub(Super):
> TypeError: function takes at most 2 arguments (3 given)
>
> My question is NOT "What's wrong here?"
> (The answer to that is that the import in Sub.py should be:  from Super
> import Super
> i.e., I tried to use the module itself where I meant to subclass the class
> defined in that module).
>
> My questions are:
>
> Why does python complain about a function here? (it's a class definition
> statement, right?)
> Is there really a function being called here?
> If so:
>     What function was called?
>     What two arguments is it expecting?
>     What three were given?
> 
> Thanks,
> -ej



From gagsl-py at yahoo.com.ar  Wed Jan 24 12:21:44 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 24 Jan 2007 14:21:44 -0300
Subject: Simple Matrix class
In-Reply-To: <1169617221.481444.135820@v45g2000cwv.googlegroups.com>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>
	<mailman.3049.1169600368.32031.python-list@python.org>
	<1169602411.917985.89840@l53g2000cwa.googlegroups.com>
	<mailman.3051.1169604934.32031.python-list@python.org>
	<1169617221.481444.135820@v45g2000cwv.googlegroups.com>
Message-ID: <7.0.1.0.0.20070124141952.03497450@yahoo.com.ar>

At Wednesday 24/1/2007 02:40, Paul McGuire wrote:

> > The points should be aligned on a log-log plot to be a power function.
> > As Robert Kern stated before, this problem should be not worse than
> > O(n**3) - how have you implemented it?
> >
>Sure enough, the complete equation is t = 5e-05exp(1.1n), or t = 5e-05
>X 3**n.

So either reimplement it better, or place a notice in BIG letters to 
your users about the terrible time and memory penalties of using inverse()


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From oyekomova at hotmail.com  Sat Jan 13 14:13:57 2007
From: oyekomova at hotmail.com (oyekomova)
Date: 13 Jan 2007 11:13:57 -0800
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
	<eo78ah$dqc$1@sea.gmane.org>
	<mailman.2633.1168583356.32031.python-list@python.org>
Message-ID: <1168715634.695961.14710@l53g2000cwa.googlegroups.com>

Thanks to everyone for their excellent suggestions. I was able to
acheive the following results with all your suggestions. However, I am
unable to cross file size of 6 million rows. I would appreciate any
helpful suggestions on avoiding memory errors. None of the solutions
posted was able to cross this limit.

>>> Data size 999999
Elapsed 31.60352213
>>> ================================ RESTART ================================
>>>
Data size 1999999
Elapsed 63.4050884573
>>> ================================ RESTART ================================
>>>
Data size 4999999
Elapsed 177.888915777
>
Data size 5999999'
Traceback (most recent call last):
  File "C:/Documents/some.py", line 27, in <module>
    read_test()
  File "C:/Documents/some.py", line 21, in read_test
    data   = array(data, dtype = float)
MemoryError








Robert Kern wrote:
> Travis E. Oliphant wrote:
>
> > If you use numpy.fromfile, you need to skip past the initial header row
> > yourself.  Something like this:
> >
> > fid = open('somename.csv')
>
> # I think you also meant to include this line:
> header = fid.readline()
>
> > data = numpy.fromfile(fid, sep=',').reshape(-1,6)
> > # for 6-column data.
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>  that is made terrible by our own mad attempt to interpret it as though it had
>  an underlying truth."
>   -- Umberto Eco



From aahz at pythoncraft.com  Mon Jan 29 20:43:58 2007
From: aahz at pythoncraft.com (Aahz)
Date: 29 Jan 2007 17:43:58 -0800
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep8gue$3tu$1@panix3.panix.com>
	<mailman.3166.1169752349.32031.python-list@python.org>
Message-ID: <epm7su$qtb$1@panix3.panix.com>

In article <mailman.3166.1169752349.32031.python-list at python.org>,
Carl J. Van Arsdall <cvanarsdall at mvista.com> wrote:
>Aahz wrote:
>>
>> My response is that you're asking the wrong questions here.  Our database
>> server locked up hard Sunday morning, and we still have no idea why (the
>> machine itself, not just the database app).  I think it's more important
>> to focus on whether you have done all that is reasonable to make your
>> application reliable -- and then put your efforts into making your app
>> recoverable.
>>   
>Well, I assume that I have done all I can to make it reliable.  This 
>list is usually my last resort, or a place where I come hoping to find 
>ideas that aren't coming to me naturally.  The only other thing I 
>thought to come up with was that there might be network errors.  But 
>i've gone back and forth on that, because TCP should handle that for me 
>and I shouldn't have to deal with it directly in pyro, although I've 
>added (and continue to add) checks in places that appear appropriate 
>(and in some cases, checks because I prefer to be paranoid about errors).

My point is that an app that dies only once every few months under load
is actually pretty damn stable!  That is not the kind of problem that
you are likely to stimulate.

>> I'm particularly making this comment in the context of your later point
>> about the bug showing up only every three or four months.
>>
>> Side note: without knowing what error messages you're getting, there's
>> not much anybody can say about your programs or the reliability of
>> threads for your application.
>   
>Right, I wasn't coming here to get someone to debug my app, I'm just 
>looking for ideas.  I constantly am trying to find new ways to improve 
>my software and new ways to reduce bugs, and when i get really stuck, 
>new ways to track bugs down.  The exception won't mean much, but I can 
>say that the error appears to me as bad data.  I do checks prior to 
>performing actions on any data, if the data doesn't look like what it 
>should look like, then the system flags an exception.
>
>The problem I'm having is determining how the data went bad.  In 
>tracking down the problem a couple guys mentioned that problems like 
>that usually are a race condition.  From here I examined my code, 
>checked out all the locking stuff, made sure it was good, and wasn't 
>able to find anything.  Being that there's one lock and the critical 
>sections are well defined, I'm having difficulty.  One idea I have to 
>try and get a better understanding might be to check data before its 
>stored.  Again, I still don't know how it would get messed up nor can I 
>reproduce the error on my own. 
>
>Do any of you think that would be a good practice for trying to track 
>this down? (Check the data after reading it, check the data before 
>saving it)

What we do at my company is maintain log files.  When we think we have
identified a potential choke point for problems, we add a log call.
Tracking this down will involve logging the changes to your data until
you can figure out where it goes wrong -- once you know where it goes
wrong, you have an excellent chance of figuring out why.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From masteroftheluffers at hotmail.com  Tue Jan  9 09:33:21 2007
From: masteroftheluffers at hotmail.com (luffmusse)
Date: 9 Jan 2007 06:33:21 -0800
Subject: Survey respondents needed for masters thesis
Message-ID: <1168353200.954036.160540@m30g2000cwm.googlegroups.com>

We are two students from the Royal Institute of Technology in
Stockholm, Sweden (http://www.kth.se/eng/). We are currently doing our
masters thesis in Applied Information Technology where we specialize in
security. As a part of this thesis we will do a survey where we compare
general information about software organizations and software projects
with certain aspects and activities specific for the creation of secure
software.

We would really appreciate if you participated in this survey to help
us with this masters thesis. Please feel free to spread information
about this survey to your colleagues or any friends you have in the
software industry. All answers we can get are helpful to us!

The survey is available at
http://support.objectplanet.com/opinio/s?s=12074

Gustav Ringbom (gringbom [at] kth.se)
Christoffer Bergman (chr83 [at] kth.se)



From david at boddie.org.uk  Wed Jan 24 09:28:49 2007
From: david at boddie.org.uk (David Boddie)
Date: 24 Jan 2007 06:28:49 -0800
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <mEJth.20273$bH4.2768@tornado.fastwebnet.it>
References: <ep60jp$63v$1@aioe.org><ep64ic$epi$1@aioe.org>
	<45b69f63$0$24463$88260bb3@free.teranews.com>
	<mEJth.20273$bH4.2768@tornado.fastwebnet.it>
Message-ID: <1169648929.902359.117790@v45g2000cwv.googlegroups.com>

On Jan 24, 3:00 pm, Giovanni Bajo <n... at ask.me> wrote:

> Thus, it is well possible to write internal GPL software, using the Qt Open
> Source library, and to release/distribute/use it *ONLY* internally.

http://www.gnu.org/licenses/gpl-faq.html#GPLRequireSourcePostedPublic

> Also, it
> should be made clear that a company can of course relicense its own
> proprietary libraries as GPL for internal usage only, so that they can be
> linked to other GPL libraries "legally".

That seems to be a reasonable approach, though it seems to me that the
GPL grants even "internal" users certain rights.

> [[ Another page of similar babble is the one where they try to convince you
> that you cannot use the Qt Open Source edition to develop a software, and then
> buy the commercial edition only the day before you want to release it as non
> open-source. I can't even understand how they can even try to support such a
> nonsense position. You're free to develop your software for years as GPL
> without distributing it, and then relicense your own code whenever you want.
> They're obviously just trying to scare people. ]]

That's nothing to do with any restrictions in the GPL; it's more to do
with
purchasing a commercial license. Obviously, if you're operating a dual
licensing scheme, it's not in your interest to encourage people to
pretend
to write open source software up until the day it is released as a
closed
source product. That sort of behaviour is not exactly inviting mutual
trust
between vendor and customer, is it?

David



From http  Thu Jan 18 10:46:18 2007
From: http (Paul Rubin)
Date: 18 Jan 2007 07:46:18 -0800
Subject: Would a Dutch speaker please check this wiki page please?
References: <mailman.2852.1169070591.32031.python-list@python.org>
	<a9dd0$45aea341$d443bb3a$10472@news.speedlinq.nl>
	<45af8edf$0$336$e4fe514c@news.xs4all.nl>
Message-ID: <7x8xg0s5h1.fsf@ruckus.brouhaha.com>

"Martin P. Hellwig" <mhellwig at xs4all.nl> writes:
> Indeed it's not Afrikaans but just incorrect use of Dutch and not
> related to python.

It was apparently posted by someone with a .be address, so I'll guess
it was written a Belgian French speaker who knows some Dutch.  The
"me" vs "mijn" error sounds like something a French speaker might have
done.


From vithi99 at hotmail.com  Mon Jan 15 13:53:18 2007
From: vithi99 at hotmail.com (vithi)
Date: 15 Jan 2007 10:53:18 -0800
Subject: How to write code to get focuse the application which is open
	from server
In-Reply-To: <m%Oqh.10311$pQ3.45@newsread4.news.pas.earthlink.net>
References: <1168143871.536432.252010@v33g2000cwv.googlegroups.com>
	<45a0dae2$0$8948$4c368faf@roadrunner.com>
	<1168837895.073936.270330@11g2000cwr.googlegroups.com>
	<m%Oqh.10311$pQ3.45@newsread4.news.pas.earthlink.net>
Message-ID: <1168887198.362699.176110@51g2000cwl.googlegroups.com>

Dennis,
I am sorry that was a typing error. I try like that
app.Print.OK.Click() but it was not working. The printer window was not
IdentifiedIs their any method I can use to achive the same goal. How
the window title was used as class name?. Could you please help me to
solve this problem.
thanks
this is the error meassage

Traceback (most recent call last):
  File "C:\Python24\test1.py", line 10, in -toplevel-
    app.Print.Ok.CloseClick()
  File "c:\python24\pywinauto\pywinauto\application.py", line 237, in
__getattr__
    ctrls = _resolve_control(
  File "c:\python24\pywinauto\pywinauto\application.py", line 854, in
_resolve_control
    ctrl = _get_ctrl(criteria)
  File "c:\python24\pywinauto\pywinauto\application.py", line 622, in
_get_ctrl
    dialog = controls.WrapHandle(
  File "c:\python24\pywinauto\pywinauto\findwindows.py", line 62, in
find_window
    windows = find_windows(**kwargs)
  File "c:\python24\pywinauto\pywinauto\findwindows.py", line 177, in
find_windows
    windows = findbestmatch.find_best_control_matches(
  File "c:\python24\pywinauto\pywinauto\findbestmatch.py", line 483, in
find_best_control_matches
    raise MatchError(items = name_control_map.keys(), tofind =
search_text)
MatchError: Could not find 'Print' in '['', u'Transparent Windows
Client0', u'Transparent Windows Client2', u'Transparent Windows
Client1', u'Print - \\\\Remote', u'Transparent Windows Client', u'Print
- \\\\RemoteTransparent Windows Client']'

This is the code
import sys
import time
import application
app = application.Application()
qi=app.window_(title_re = ".*ArcView.*")
time.sleep(2)
qi.TypeKeys("%FP")
time.sleep(2)

app.Print.Ok.CloseClick()


Dennis Lee Bieber wrote:
> On 14 Jan 2007 21:11:35 -0800, "vithi" <vithi99 at hotmail.com> declaimed
> the following in comp.lang.python:
>
> >
> > my code goes like that
>
> 	"goes like"?  Don't type similarities from memory -- cut&paste the
> actual code (or, preferably, a stripped down version that you've
> actually run) that shows the behavior in question.
>
> > app=application.Application()
> > qi = app.window_(title_re = ".*arcMap.*")
> > qi.TypeKeys("%FP")
> > app,Print.OK.Click()
> >
> 	And what is that last line supposed to be doing. "app,anything" is
> two separate objects: an application object, and something called Print
> with an attribute called OK which itself has a method called Click
>
> 	I suspect, at a minimum, that last line is supposed to be
> 
> app.Print.OK.Click()
>    ^	period, not



From edquichan at yahoo.com  Thu Jan 18 12:27:33 2007
From: edquichan at yahoo.com (EdG)
Date: 18 Jan 2007 09:27:33 -0800
Subject: Traversing the properties of a Class
Message-ID: <1169141253.332211.12790@38g2000cwa.googlegroups.com>

I'm using Python version 2.4 and I created a class with some properties
like:

def GetCallAmount(self):
        return somedata

def GetCallCurrency(self):
    return  somemoredata

more....defs..etc.

CallAmount           = property(GetCallAmount,None,None,None)
CallCurrency         = property(GetCallCurrency, None, None, None)

more....properies..etc.

For debugging purposes, I would like to traverse the class listing out
all the properties.



From gagsl-py at yahoo.com.ar  Mon Jan  8 20:47:36 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 08 Jan 2007 22:47:36 -0300
Subject: Non-blocking pipes during subprocess handling
In-Reply-To: <22q5q25jn7dfti18rv1tshj7os5a0gm27r@4ax.com>
References: <22q5q25jn7dfti18rv1tshj7os5a0gm27r@4ax.com>
Message-ID: <7.0.1.0.0.20070108224528.00fd0238@yahoo.com.ar>

At Monday 8/1/2007 22:09, Tom Plunket wrote:

>I'm using subprocess to launch, well, sub-processes, but now I'm
>stumbling due to blocking I/O.
>
>Is there a way for me to know that there's data on a pipe, and possibly
>how much data is there so I can get it?  Currently I'm doing this:

Using a thread for each stream is the safest way, specially if you 
can't control the child process.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From bcannon at gmail.com  Sun Jan  7 00:49:50 2007
From: bcannon at gmail.com (bcannon at gmail.com)
Date: 6 Jan 2007 21:49:50 -0800
Subject: Got questions to pose to the Python-Dev panel at PyCon?
Message-ID: <mailman.2389.1168183139.32031.python-announce-list@python.org>

On the first conference day of PyCon after lunch there is going to be a
discussion panel for Python-Dev (see
http://us.pycon.org/apps07/schedule/ for the schedule).  It is going to
be moderated by Steve Holden and is slated to have myself (Brett
Cannon), Andrew Kuchling (AMK), Neal Norwitz, and Jeremy Hylton on the
panel.

But in order to make the panel a success we need some questions.  We
will have a portion of time open to questions from the floor, but we
would also like to have some questions lined up.  If you have any
questions you would like to have answered by the panel, please add them
to http://us.pycon.org/TX2007/PythonDevPanel .  The wiki page will be
considered the definitive location of collected questions so please do
not leave any questions as a reply to this announcement as it will not
get noticed.

I do not know if there will be an audio or video recording of the panel
discussion, but there is a decent chance if last year's PyCon is any
indication.  Plus someone in the audience might be kind enough to type
up a transcript and post it online.

Thanks in advance to anyone who contributes a question.

-Brett C.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Jan  9 13:13:06 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 09 Jan 2007 19:13:06 +0100
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
	<envur1$rq1$1@gemini.csx.cam.ac.uk>
Message-ID: <50i49iF1fvo3rU1@mid.individual.net>

Nick Maclaren wrote:

> No, don't.  That is about another matter entirely, 

It isn't.

Regards,


Bj?rn

-- 
BOFH excuse #366:

ATM cell has no roaming feature turned on, notebooks can't connect



From arkanes at gmail.com  Wed Jan 10 10:10:04 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 10 Jan 2007 09:10:04 -0600
Subject: Need startup suggestions for writing a MSA viewer GUI in python
In-Reply-To: <eo2uhr$ffn$1@news.lysator.liu.se>
References: <eo2uhr$ffn$1@news.lysator.liu.se>
Message-ID: <4866bea60701100710g7bed1dd9t916e7cc8f4386399@mail.gmail.com>

On 1/10/07, Joel Hedlund <joel.hedlund at gmail.com> wrote:
> Hi!
>
> I've been thinking about writing a good multiple sequence alignment
> (MSA) viewer in python. Sort of like ClustalX, only with better zoom and
> pan tools. I've been using python in my work for a couple of years, but
> this is my first shot at making a GUI so I'd very much appreciate some
> ideas from you people to get me going in the right direction. Despite my
> GUI n00b-ness I need to get it good and usable with an intuitive look
> and feel.
>
> What do you think I should do? What packages should I use?
>
> For you non-bioinformatic guys out there, an MSA is basically a big
> matrix (~1000 cols x ~100 rows) of letters, where each row represents a
> biological sequence (gene, protein, etc...). Each sequence has an ID
> that is usually shorter than 40 characters (typically, 8-12). Usually,
> msa visualizers color the letters and their backgrouds according to
> chemical properties.
>
> I want the look and feel to be pretty much like a modern midi sequencer
> (like cubase, nuendo, reason etc...). This means the GUI should have
> least three panes; one to the left to hold the IDs, one in the bottom to
> hold graphs and plots (e.g: user configurable tracks), and the main one
> that holds the actual MSA and occupies most of the space. The left and
> bottom panes should be resizable and foldable.
>
> I would like to be able to zoom and pan x and y axes independently to
> view different portions of the MSA, and the left and bottom panes should
> follow the main pane. I would also like to be able to use drag'n'drop on
> IDs for reordering sequences, and possibly also on the MSA itself to
> shift sequences left and right. Furthermore, I would like to be able to
> select sequences and positions (individually, in ranges or sparsely). I
> would like to have a context sensitive menu on the right mouse button,
> possibly with submenus. Finally, I'd like to be able to export printable
> figures (eps?) of regions and whole MSAs.
>
> I'm thinking all three panes may have to be rendered using some sort of
> scalable graphics because of the coloring and since I'd like to be able
> to zoom freely. I'll also need to draw graphs and plots for the tracks.
> Is pygame good for this, or is there a better way of doing it?
>
> I want my viewer to behave and look like any other program, so I'm
> thinking maybe I should use some standard GUI toolkit instead, say PyQT
> or PyGTK? Would they still allow me to render the MSA nicely?
>
> Does this seem like a humongous project?
>
> Thanks for taking the time!
> /Joel Hedlund

This will probably be a major, but not humongous project. wxPython,
pyGTk, and pyQt all have the architecture and basics you'll need, it
will probably be about the same amount of work to create in all of
them. Pick the one that best suites your licensing and platform needs.


From cvanarsdall at mvista.com  Wed Jan 31 18:13:59 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 31 Jan 2007 15:13:59 -0800
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <20070131222016.25807.1107543360.divmod.quotient.5093@ohm>
References: <20070131222016.25807.1107543360.divmod.quotient.5093@ohm>
Message-ID: <45C122B7.6000701@mvista.com>

Jean-Paul Calderone wrote:
> [snip]
>>
>>     
>
> You're right.  Learning new things is bad.  My mistake.
>
> Jean-Paul
>   
That isn't what I said at all.  You have to look at it from a 
cost/benefit relationship.  Its a waste of time/money to learn something 
complex to do something simple.  For the simple things, use a simple 
solution.  KISS.  When he has an application that would require 
something more complex, it would be at that point he should consider 
using it for a project.  Unless the OP has a desire to learn this 
technology, then more power to him.  I, however, do not believe that 
would be the best approach for a simple problem.

Knowing the appropriate tool for the job is a trait of an good engineer.

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From vithi99 at hotmail.com  Wed Jan 31 16:29:24 2007
From: vithi99 at hotmail.com (vithi)
Date: 31 Jan 2007 13:29:24 -0800
Subject: win32com.client
Message-ID: <1170278964.738118.219600@k78g2000cwa.googlegroups.com>

Hi
Any one tell me where I can get (or download) python modules win32com
or win32com.client because I have to use "Dispatch"  thanks



From albert.wellens at gmail.com  Wed Jan 17 14:03:15 2007
From: albert.wellens at gmail.com (awel)
Date: 17 Jan 2007 11:03:15 -0800
Subject: Check a windows service
References: <1168966952.965088.17740@l53g2000cwa.googlegroups.com>
	<1168967374.568967.173690@11g2000cwr.googlegroups.com>
	<1168985869.099273.13630@38g2000cwa.googlegroups.com>
	<1169030185.707886.229920@51g2000cwl.googlegroups.com>
Message-ID: <1169060595.905108.167190@l53g2000cwa.googlegroups.com>

Thanks for all 'cause you've really helped me

Just one thing in the last line for the specific service, you' ve
writted :

>    print service

but I think it is :

>    print service.Caption


Tim Golden a ?crit :
> awel wrote:
> > Sorry, but could you give me an example with a real service 'cause I've
> > tried this script but nothings happened, no error, nothings ; even if I
> > launch it in cmd prompt.
>
> Well, as that example said, it was designed to show
> automatic services which are not running. If you don't
> have any then nothing will show. I assumed you could
> use this as a starting point.
>
> To list all services try this:
>
> <code>
> import wmi
>
> c = wmi.WMI ()
> for service in c.Win32_Service ():
>   print service.Caption
>
> </code>
>
> To show a specific service:
>
> <code>
> import wmi
>
> c = wmi.WMI ()
> for service in c.Win32_Service (Caption="Task Scheduler"):
>   print service
> 
> </code>
> 
> TJG



From chris at wavestore.com  Fri Jan 26 12:21:40 2007
From: chris at wavestore.com (Christopher Mocock)
Date: Fri, 26 Jan 2007 17:21:40 +0000
Subject: Handling empty form fields in CGI
Message-ID: <45BA38A4.5000903@wavestore.com>

Hi all,

Bit of a python newbie so need a little help with a CGI script I'm
trying to write. I've got it working fine as long as the fields of the
form are filled in correctly, however I need to be able to accept blank
entries. Therefore I want to convert any empty entries to an empty string.

For example, if I call the following CGI script as:

http://localhost/cgi-bin/test.cgi?myfield=hello

...it prints hello in the browser. But if I call it as:

http://localhost/cgi-bin/test.cgi?myfield=

I get an exception. I want it to treat myfield as an empty string and
not throw an exception.

Any suggestions?

Thanks in advance,  Chris.

Script below:


#!/usr/bin/env python2
# Import CGI and CGI debug libraries
import cgi
import cgitb; cgitb.enable()

def test():
	value=form["myfield"].value
	print value

# Start of main code
print 'Content-type: text/html'
print

# Get the contents of the query string
form = cgi.FieldStorage()

test()



From http  Thu Jan 25 07:37:06 2007
From: http (Paul Rubin)
Date: 25 Jan 2007 04:37:06 -0800
Subject: While loop with "or"? Please help!
References: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
Message-ID: <7xac07uvt9.fsf@ruckus.brouhaha.com>

wd.jonsson at gmail.com writes:
>     while usrinp != "y" or "Y" or "N" or "n": <<<<----PROBLEM

    while userinp not in 'yYnN':
      ...

Or maybe more generally:

    while userinp.lower() not in 'yn':    # case independent test
       ...


From nick at craig-wood.com  Tue Jan  9 07:30:06 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 09 Jan 2007 06:30:06 -0600
Subject: Non-blocking pipes during subprocess handling
References: <22q5q25jn7dfti18rv1tshj7os5a0gm27r@4ax.com>
Message-ID: <slrneq706m.4bc.nick@irishsea.home.craig-wood.com>

Tom Plunket <tomas at fancy.org> wrote:
>  I'm using subprocess to launch, well, sub-processes, but now I'm
>  stumbling due to blocking I/O.
> 
>  Is there a way for me to know that there's data on a pipe, and possibly
>  how much data is there so I can get it?

You might want to check out this modification to subprocess which does
non-blocking pipes.

  http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440554

I personally think something like that should be built into subprocess

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


From Thomas.Ploch at gmx.net  Sun Jan  7 10:52:13 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sun, 07 Jan 2007 16:52:13 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <7x3b6mzwkl.fsf@ruckus.brouhaha.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>	<mailman.2383.1168131242.32031.python-list@python.org>	<7xd55rzke9.fsf@ruckus.brouhaha.com>	<slrneq2055.tcj.grahn+nntp@frailea.sa.invalid>	<mailman.2388.1168181437.32031.python-list@python.org>
	<7x3b6mzwkl.fsf@ruckus.brouhaha.com>
Message-ID: <45A1172D.7010609@gmx.net>

Paul Rubin schrieb:
> Thomas Ploch <Thomas.Ploch at gmx.net> writes:
>> Me neither, although I have to say that the '__' prefix comes pretty
>> close to being 'private' already. It depends on the definition of
>> private. For me, private means 'not accessible from outside the
>> module/class'.

> 
>     class A:
>       __x = 3
> 
>     class B(A):
>       __x = 4   # ok
> 
>     class C(B):
>       __x = 5   # oops!
> 
> Consider that the above three class definitions might be in separate
> files and you see how clumsy this gets.  


I don't understand why this should be oops, even if they are in
different files.

 >>> a = A()
 >>> print a._A__x
 3
 >>> b = B()
 >>> print b._B__x
 4
 >>> c = C()
 >>> print c._C__x
 5
 >>> dir(c)
 ['_A__x', '_B__x', '_C__x', '__doc__', '__module__']
 >>> print c._A__x
 3
 >>> print c._B__x
 4


From bdesth.quelquechose at free.quelquepart.fr  Sat Jan 20 13:54:26 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 20 Jan 2007 19:54:26 +0100
Subject: Win GUI application: avoiding DOS console
In-Reply-To: <eotkr7$ffdf$1@zam602.zam.kfa-juelich.de>
References: <eotkr7$ffdf$1@zam602.zam.kfa-juelich.de>
Message-ID: <45b25ec1$0$16367$426a74cc@news.free.fr>

Siggi a ?crit :
> Hi all,
> 
> how do I avoid the DOS console show-up when starting a WinXP GUI application 
> with mouseclick on the respective Python file?

rename yourfile.py to yourfile.pyw


From adonis at REMOVETHISearthlink.net  Mon Jan 22 15:40:57 2007
From: adonis at REMOVETHISearthlink.net (Adonis Vargas)
Date: Mon, 22 Jan 2007 20:40:57 GMT
Subject: Best way to document Python code...
In-Reply-To: <1169492869.101706.253620@38g2000cwa.googlegroups.com>
References: <1169492869.101706.253620@38g2000cwa.googlegroups.com>
Message-ID: <tj9th.13185$pQ3.6593@newsread4.news.pas.earthlink.net>

Scott Huey wrote:
> I am working on a Python module and I would like to prepare some API
> documentaiton. I managed to find epydoc after some searching online.
> 
> Is there a standard way to document the API for Python modules? Is
> epydoc the best way to go if there is no standard? Are there other ways
> to document a Python API?
> 
> Thanks,
> 
> Scott Huey
> 

The "standard" is to use docstrings

i.e.,

class MyModule:
     """
     This module does something
     """

     def someMethod(self):
     """
     This method does something, accepts args/returns value etc.
     """

Then one way to view the docstrings is to start a python shell, import 
your module, and do help(MyModule)

i.e.,

module: mymodule.py
class: MyModule

do in the shell:

import mymodule
help(mymodule.MyModule)

Then Python will generate a quick help interface for your module. I 
suspect epydoc uses docstrings but I *may* be wrong, since I have never 
used epydoc. But a quick look at pydoc (not to be confused with epydoc) 
which is part of the standard library allows you to generate 
documentation in HTML format, and/or serve it over web with its built-in 
HTTP server.

pydoc: http://docs.python.org/lib/module-pydoc.html

Hope this helps.

Adonis


From hg at nospam.org  Wed Jan  3 08:25:46 2007
From: hg at nospam.org (hg)
Date: Wed, 03 Jan 2007 14:25:46 +0100
Subject: array of class / code optimization
References: <mailman.2221.1167763760.32031.python-list@python.org>
	<AOPmh.83$9v1.124@nntpserver.swip.net>
	<6UPmh.6785$hr3.92@newsfe24.lga> <4MQmh.145$jr6.14@read3.inet.fi>
	<slrnepntff.1lk.horpner@FIAD06.norwich.edu>
Message-ID: <7jUmh.25917$9e.12558@newsfe20.lga>

Neil Cerutti wrote:

> On 2007-01-03, Jussi Salmela <tiedon_jano at hotmail.com> wrote:
>> hg kirjoitti:
>>> mm wrote:
>>> 
>>>> Yes, it was the (), equivalent to thiks like new() create new object
>>>> from class xy.
>>>>>   s1.append(Word)
>>>> s1.append(Word())
>>>>
>>>> But I was looking for a "struct" equivalent like in c/c++.
>>>> And/or "union". I can't find it.
>>>>
>>>> Maybe you know a source (URL) "Python for c/c++ programmers" or things
>>>> like that.
>>>>
>>>>
>>>> Yes, I konw whats an object is...
>>> 
>>> 
>>> A struct in C is unrelated to a struct in C++ as a struct in C++ _is_ a
>>> class.
>>> 
>>> 
>>> hg
>>
>> What does your sentence mean, exactly? If I take a C file xyz.c
>> containing a struct definition S, say, rename it to be xyz.cpp
>> and feed it to a C++ compiler, the S sure remains a struct and
>> the C++ compiler has no difficulty in handling it as a struct,
>> so ?!?
> 
> That's true.
> 
> But it's also true that
> 
> struct foo {
>   int x, y;
> };
> 
> is exactly equivalent to:
> 
> class foo {
>   public:
>     int x, y;
> };
> 
> The only difference between struct and class in C++ is the
> default access specification of its members.
> 
> --
> Neil Cerutti
> For those of you who have children and don't know it, we have a nursery
> downstairs. --Church Bulletin Blooper


And that is what I meant.

hg




From weekender_ny at yahoo.com  Mon Jan 22 02:06:25 2007
From: weekender_ny at yahoo.com (John)
Date: 21 Jan 2007 23:06:25 -0800
Subject: class explorer for automating IE
In-Reply-To: <1169448532.869501.190530@v45g2000cwv.googlegroups.com>
References: <1169448532.869501.190530@v45g2000cwv.googlegroups.com>
Message-ID: <1169449585.832667.325370@11g2000cwr.googlegroups.com>


Is there an analogue of IE Mechanize in python?

http://search.cpan.org/src/ABELTJE/Win32-IE-Mechanize-0.009/README

Thanks,
--j

On Jan 22, 1:48 am, "John" <weekender... at yahoo.com> wrote:
> I found this class which was written in 2003.
>
> http://xper.org/wiki/seminar/InternetExplorerAutomation
>
> Is there a better/more complete version around that someone knows of.
> 
> Thanks,
> --j



From nmm1 at cus.cam.ac.uk  Mon Jan 15 04:02:41 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 15 Jan 2007 09:02:41 GMT
Subject: Maths error
References: <mailman.2480.1168350033.32031.python-list@python.org><Xns98B384E126F4Ctim111one@216.196.97.136><eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136><eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org><eo7kdf$a80$1@gemini.csx.cam.ac.uk
	<eoabbl$270$1@gemini.csx.cam.ac.uk>
	<mailman.2709.1168753952.32031.python-list@python.org>
	<f4mlq29t80pvvqbfm2ch2r2uf6tfnhlmnl
Message-ID: <eoffvh$cfv$1@gemini.csx.cam.ac.uk>


In article <f4mlq29t80pvvqbfm2ch2r2uf6tfnhlmnl at 4ax.com>,
Tim Roberts <timr at probo.com> writes:
|> "Hendrik van Rooyen" <mail at microcorp.co.za> wrote:
|> 
|> >> What I don't know is how much precision this approximation loses when
|> >> used in real applications, and I have never found anyone else who has
|> >> much of a clue, either.
|> >> 
|> >I would suspect that this is one of those questions which are simple
|> >to ask, but horribly difficult to answer - I mean - if the hardware has 
|> >thrown it away, how do you study it - you need somehow two
|> >different parallel engines doing the same stuff, and comparing the 
|> >results, or you have to write a big simulation, and then you bring 
|> >your simulation errors into the picture - There be Dragons...
|> 
|> Actually, this is a very well studied part of computer science called
|> "interval arithmetic".  As you say, you do every computation twice, once to
|> compute the minimum, once to compute the maximum.  When you're done, you
|> can be confident that the true answer lies within the interval.

The problem with it is that it is an unrealistically pessimal model,
and there are huge classes of algorithm that it can't handle at all;
anything involving iterative convergence for a start.  It has been
around for yonks (I first dabbled with it 30+ years ago), and it has
never reached viability for most real applications.  In 30 years, it
has got almost nowhere.

Don't confuse interval methods with interval arithmetic, because you
don't need the latter for the former, despite the claims that you do.

|> For people just getting into it, it can be shocking to realize just how
|> wide the interval can become after some computations.

Yes.  Even when you can prove (mathematically) that the bounds are
actually quite tight :-)


Regards,
Nick Maclaren.


From beej at beej.us  Tue Jan 30 04:34:01 2007
From: beej at beej.us (Beej)
Date: 30 Jan 2007 01:34:01 -0800
Subject: Help me understand this
In-Reply-To: <pan.2007.01.30.07.47.33.15637@REMOVEME.cybersource.com.au>
References: <1170140737.027139.14920@h3g2000cwc.googlegroups.com>
	<pan.2007.01.30.07.47.33.15637@REMOVEME.cybersource.com.au>
Message-ID: <1170146755.446429.90720@v45g2000cwv.googlegroups.com>

On Jan 29, 11:47 pm, Steven D'Aprano 
<s... at REMOVEME.cybersource.com.au> wrote:
> Outside of a print statement (and also an "except" statement), commas
> create tuples.

And function calls:

>>> 3,
(3,)
>>> type(3,)
<type 'int'>
>>> type((3,))
<type 'tuple'>

But here's one I still don't get:

>>> type(2)
<type 'int'>
>>> type((2))
<type 'int'>
>>> (2).__add__(1)
3
>>> 2.__add__(1)
  File "<stdin>", line 1
    2.__add__(1)
            ^
SyntaxError: invalid syntax

-Beej



From jakub.stolarski at gmail.com  Mon Jan  8 05:29:15 2007
From: jakub.stolarski at gmail.com (Jakub Stolarski)
Date: 8 Jan 2007 02:29:15 -0800
Subject: Walking The Right Path
References: <ghe974-gau2.ln1@eskimo.tundraware.com>
Message-ID: <1168252155.427645.316470@38g2000cwa.googlegroups.com>

Tim Daneliuk napisal(a):
> Ah yes, moral philosophy and python all come together... Er, that is to day:
>
> Imagine you have this situation on a *nix filesystem:
>
> Symlink A:  /foo -> /usr/home
> Symlink B:  /bar -> /foo/username
>
>
> If I do this:
>
>    import os
>    print os.path.realpath("/bar")
>
> I get this (as one would expect):
>
>    /usr/home/username
>
> However, what if I want to get back the result in this form:
>
>    /foo/username
>
>
> IOW, is there a way to return a symlink-based path which contains
> the symlink pointer as is was *defined* not as it expands?
> 

One way (but very ugly):
print os.path._resolve_link('/bar')



From gagsl-py at yahoo.com.ar  Fri Jan 19 11:59:37 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 13:59:37 -0300
Subject: when format strings attack
References: <1169207467.989977.162940@q2g2000cwa.googlegroups.com><mailman.2908.1169221530.32031.python-list@python.org>
	<eoqr1s$khg$1@gemini.csx.cam.ac.uk>
Message-ID: <eoqtdq$bpp$1@sea.gmane.org>

"Nick Maclaren" <nmm1 at cus.cam.ac.uk> escribi? en el mensaje
news:eoqr1s$khg$1 at gemini.csx.cam.ac.uk...
> In article <mailman.2908.1169221530.32031.python-list at python.org>,
> "Gabriel Genellina" <gagsl-py at yahoo.com.ar> writes:
> |>
> |> Pure Python programs are not affected, but a review of the C
> implementation
> |> should be made to see if any (variant of) printf is used without a
> proper
> |> format. Anyway I doubt you could find something, because the
> vulnerability
> |> is so well known for ages.
>
> Not really.  There are LOTS of vulnerabilities that have been known
> for ages and are still legion.  The reason that this is unlikely is
> that it is both easy to spot and trivial to fix.

Yes... Anyway, unless someone actually *do* revise the code, if it's easy or
not has no importance. I think that some automated tools were used to find
problems, but I don't know if this specific vulnerability was searched.

-- 
Gabriel Genellina




From csselo at gmail.com  Sat Jan  6 14:35:28 2007
From: csselo at gmail.com (csselo at gmail.com)
Date: 6 Jan 2007 11:35:28 -0800
Subject: search mail by date with imaplib
Message-ID: <1168112128.062140.308400@v33g2000cwv.googlegroups.com>

Hi
I am looking for a code sample which searches mail by date with imaplib

example:
get email from 01.01.2007 to now

how can I change imaplib search parameters?



From mattheww at chiark.greenend.org.uk  Fri Jan 26 13:28:32 2007
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 26 Jan 2007 18:28:32 +0000 (GMT)
Subject: assertions to validate function parameters
References: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
	<pan.2007.01.26.04.26.09.242968@REMOVE.THIS.cybersource.com.au>
Message-ID: <uCB*uiPBr@news.chiark.greenend.org.uk>

Steven D'Aprano  <steve at REMOVE.THIS.cybersource.com.au> wrote:
> The less your function does, the more constrained it is, the less
> testing you have to do -- but the less useful it is, and the more work
> you put onto the users of your function. Instead of saying something
> like

> a = MyNumericClass(1)
> b = MyNumericClass(6)
> # more code in here...
> # ...
> result = f(a, b)

> you force them to do this:

> a = MyNumericClass(1)
> b = MyNumericClass(6)
> # more code in here...
> # ...
> # type-cast a and b to keep your function happy
> result = f(int(a), int(b))
> # and type-cast the result to what I want
> result = MyNumericClass(result)


I have a question for you. Consider this function:

def f(n):
    """Return the largest natural power of 2 which does not exceed n."""
    if n < 1:
        raise ValueError
    i = 1
    while i <= n:
        j = i
        i *= 2
    return j

If I pass it an instance of MyNumericClass, it will return an int or a
long, not an instance of MyNumericClass.

In your view, is this a weakness of the implementation? Should the
author of the function make an effort to have it return a value of the
same type that it was passed?

-M-



From horpner at yahoo.com  Sat Jan 20 08:46:25 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 20 Jan 2007 13:46:25 GMT
Subject: OT Annoying Habits (Was: when format strings attack)
References: <mailman.2923.1169256506.32031.python-list@python.org>
	<eot4t1$b5g$1@gemini.csx.cam.ac.uk>
Message-ID: <R2psh.1504$G23.562@newsreading01.news.tds.net>

On 2007-01-20, Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
>
> In article <mailman.2923.1169256506.32031.python-list at python.org>,
> "Carroll, Barry" <Barry.Carroll at psc.com> writes:
>|> 
>|> My thanks to Aahz and the others who responded.  I also did some
>|> Googling on my own.  I found out that top-posting is the norm in the
>|> e-mail world.  Bottom- and inline-posting are the norm in the newsgroup
>|> world. =20
>
> Sorry, even that is not so.  I have been using Email since the 1960s,
> and top-posting has been used only by the inconsiderate.

...or the beleaguered. Since my school's IT switched to Exchange,
correct email composition is really annoying.

The only way to do it is to manually cut into a real editor, and
then past back in the entire message. This is not worth the
hassle for interoffice communication, since everyone else is
stuck with stupid top-posting, too.

It's been an interesting journey, from some unix-based terminal
email, to Lotus Notes (ARRGH!), then a happy time using IMAP, and
now back to (ARRGH!).

-- 
Neil Cerutti


From martin at v.loewis.de  Mon Jan  8 03:36:02 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 08 Jan 2007 09:36:02 +0100
Subject: Recommendations (or best practices) to define functions (or
	methods)
In-Reply-To: <1168243875.143604.269720@q40g2000cwq.googlegroups.com>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
	<45A1F1D9.8070206@v.loewis.de>
	<1168243875.143604.269720@q40g2000cwq.googlegroups.com>
Message-ID: <45A20272.3020401@v.loewis.de>

Frank Millman schrieb:
> If there is something wrong with the SQL statement, I do not want to
> crash the server, I want to notify the client that there was something
> wrong, so that the offending module can be corrected and reloaded.

Right. In a distributed system, you should propagate the error (in some
form) to the client.

Then the question is what the best form is: IMO, you should keep as
much information as possible. This means you either return the Python
exception to the client, to be re-raised on the client side, or you
log the exception on the server side, and just return to the client
the information that the full error message has been logged.

In any case: this should happen on the middleware layer, i.e. the place
that does the communication. Wrt. the OP's code, I still maintain that
all of his approaches to "silence" the exception are flawed. Exception
handling should either recover from the error (e.g. by adjusting the
environment, then retrying) or abort the execution. In a distributed
case, "abort the execution" may not mean "terminate the program", but
instead "immediately abort execution of the current request and return
an error to the client".

Regards,
Martin


From exarkun at divmod.com  Wed Jan 10 09:19:22 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 10 Jan 2007 09:19:22 -0500
Subject: maximum number of threads
In-Reply-To: <c2701f5c0701100611u69732112v8b5e4782d0944ba@mail.gmail.com>
Message-ID: <20070110141922.11447.451680748.divmod.quotient.12156@ohm>

On Wed, 10 Jan 2007 12:11:59 -0200, Felipe Almeida Lessa <felipe.lessa at gmail.com> wrote:
>On 1/10/07, Laurent Pointal <laurent.pointal at limsi.fr> wrote:
>>This is a system configurable limit (up to a maximum).
>>
>>See ulimit man pages.
>>
>>test
>>
>>         ulimit -a
>>
>>to see what are the current limits, and try with
>>
>>         ulimit -u 2000
>>
>>to modify the maximum number of user process (AFAIK each thread use a
>>process entry on Linux)
>
>I don't think it's only this.

Indeed you are correct.  The actual limit you are hitting is the size
of your address space.  Each thread is allocated 8MB of stack.  382
threads consumes about 3GB of address space.  Even though most of this
memory isn't actually allocated, the address space is still used up.  So,
when you try to create the 383rd thread, the kernel can't find anyplace
to put its stack.  So you can't create it.

Try reducing your stack size or reducing the number of threads you create.
There's really actually almost no good reason to have this many threads,
even though it's possible.

    exarkun at charm:~$ python Desktop/test.py
    50
    100
    150
    200
    250
    300
    350
    Exception raised: can't start new thread
    
    Biggest number of threads: 382
    exarkun at charm:~$ ulimit -Ss 4096
    exarkun at charm:~$ python Desktop/test.py
    50
    100
    150
    200
    250
    300
    350
    400
    450
    500
    550
    600
    650
    700
    750
    Exception raised: can't start new thread
    
    Biggest number of threads: 764
    exarkun at charm:~$
    
Jean-Paul


From cvanarsdall at mvista.com  Fri Jan 26 12:30:21 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Fri, 26 Jan 2007 09:30:21 -0800
Subject: Mounting shares with python
In-Reply-To: <1169815227.574577.176610@m58g2000cwm.googlegroups.com>
References: <1169815227.574577.176610@m58g2000cwm.googlegroups.com>
Message-ID: <45BA3AAD.5050906@mvista.com>

Marcpp wrote:
> Hi, when i mount a share with python...
>
> os.system ("mount -t smbfs -o username=nobody ...")
>
> the problem is that I'll to be root.
> Have a comand to send a root password...?
> I've tried
>
> os.system ("su")
> os.system ("the password")
>
> but it doesn't works.
>
>   
I do a lot of that type of stuff.  Just setup sudo access for that user 
and have it state no password.

I also do that stuff on remote machines, similarly, setup ssh such that 
you don't need to use a password.  It will work :)

-c

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From michele.simionato at gmail.com  Fri Jan  5 11:01:17 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 5 Jan 2007 08:01:17 -0800
Subject: program deployment
In-Reply-To: <1168010377.179056.220500@s80g2000cwa.googlegroups.com>
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
	<12psqtppgi5cme6@corp.supernews.com>
	<1168010377.179056.220500@s80g2000cwa.googlegroups.com>
Message-ID: <1168012877.398078.59120@s80g2000cwa.googlegroups.com>

king kikapu wrote:
> > > Are they embarassed by their code?
>
> hehehe...no, just worried about stealing their ideas...

I believe that shipping just the bytecode is a pretty effective way to
stop 99% of programmers from
reading your code. Yes, in theory they could decompile it, but in
practice, programmers are lazy.
Look, I am so lazy that usually I don't read the source code, even if
it is there in plain!

Of course, if you only ship the bytecode and your code has bugs, the
tracebacks will be
less explicit and it will be more difficult for you to support your
users. Also, you will stop
the users that could fix the bug for you from doing so and you will
rule out the possibility
of getting help for free. Think about that.

If it was that easy to steal non-trivial ideas from the source code, we
will not complain all
the time about about how difficult is to understand the code written by
others.

 Michele Simionato



From robert.kern at gmail.com  Wed Jan 17 20:44:29 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 17 Jan 2007 19:44:29 -0600
Subject: Units of measurement
In-Reply-To: <1169082689.148793.312130@51g2000cwl.googlegroups.com>
References: <7x8xg1xr62.fsf_-_@ruckus.brouhaha.com>	<mailman.2854.1169072873.32031.python-list@python.org>
	<1169082689.148793.312130@51g2000cwl.googlegroups.com>
Message-ID: <eomje7$dtv$1@sea.gmane.org>

Russ wrote:
> Robert Kern wrote:

>> And there was another one announced here sometime in the past year or so, IIRC,
>> but I don't recall the name of it or that of the author.  :-(
> 
> Perhaps you are referring to the scalar class at
> http://RussP.us/scalar.htm

Yup, you're the one.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From vgvr620034 at gmail.com  Wed Jan 17 09:31:23 2007
From: vgvr620034 at gmail.com (raghu)
Date: 17 Jan 2007 06:31:23 -0800
Subject: How can i eval subindex on list[ ][ ] ?
In-Reply-To: <mailman.2822.1169032836.32031.python-list@python.org>
References: <1168988937.512029.192800@q2g2000cwa.googlegroups.com>
	<mailman.2822.1169032836.32031.python-list@python.org>
Message-ID: <1169044283.798684.220660@11g2000cwr.googlegroups.com>


its working for me i think its better to mention the value of i and j
for both lists or you might have done mistake while formatting strings
it should be %s for strings and %d for numbers if any subelement in
lists does not formatted properly it may lead to error



From beej at beej.us  Sun Jan 28 21:50:52 2007
From: beej at beej.us (Beej)
Date: 28 Jan 2007 18:50:52 -0800
Subject: IP address
In-Reply-To: <ephtph$fcl$1@minji.szn.dk>
References: <mailman.3244.1169978684.32031.python-list@python.org>
	<ephtph$fcl$1@minji.szn.dk>
Message-ID: <1170039052.541186.326990@j27g2000cwj.googlegroups.com>

On Jan 28, 2:26 am, Klaus Alexander Seistrup <k... at seistrup.dk> wrote:
> Scripter47 wrote:
> > How do i get my ip address?
>
> > in cmd.exe i just type "ipconfig" then it prints:
> >       ...
> >       IP-address . . . . . . . . . . . . . . . . . : 192.168.1.10
> >       ...
> > how can i do that in python??#v+
>
> python -c 'import re, urllib; print re.findall("<title>Your IP: (.+?)</title>", urllib.urlopen("http://myip.dk/").read())[0]'

This is extremely unlikely to return 192.168.1.10. :-)

(It will give you the address of your firewall or whatever is your 
gateway to the outside world...  which is a cool thing to know, but 
I'm not sure it's what the op's after.)

-Beej



From chrisspen at gmail.com  Sat Jan 13 11:54:56 2007
From: chrisspen at gmail.com (Chris)
Date: 13 Jan 2007 08:54:56 -0800
Subject: AlphaBeta Search
In-Reply-To: <1168693959.611167.80050@s34g2000cwa.googlegroups.com>
References: <1168649650.163717.263240@38g2000cwa.googlegroups.com>
	<1168693959.611167.80050@s34g2000cwa.googlegroups.com>
Message-ID: <1168707293.848867.264050@q2g2000cwa.googlegroups.com>

bearophileH... at lycos.com wrote:
> Chris wrote:
> > I know this probably seems trivial, but I can't seem to find the bug in
> > my alphabeta search implementation.
>
> This is another alphabeta implementation (all the nicest algorithms are
> inside this AIMA codebase):
> http://aima.cs.berkeley.edu/python/games.html
>
> Later when you program works you can find this helpful to improve your
> algorithm:
> http://citeseer.ist.psu.edu/11954.html

Thanks. I actually already knew about the AIMA implementation, and used
that and an alternative version on wikipedia to fix my code. It turns
out my heuristic_value function was incorrect. I've also managed to get
it working with a transposition table, which has really sped things up.



From shanugulati at gmail.com  Sun Jan 28 03:54:15 2007
From: shanugulati at gmail.com (Shaine)
Date: 28 Jan 2007 00:54:15 -0800
Subject: New Way to Search the Information - Ogleo.com - An Integrated Search
Message-ID: <1169974455.636306.257550@p10g2000cwp.googlegroups.com>

We have just launched a new Search Tool - http://www.ogleo.com
Kindly have a look and give us your suggestions here:
Ogleo Discussion Forum http://forum.ogleo.com

Links:
======
Ogleo Home Page - http://www.ogleo.com
Ogleo Traffic Details - http://ogleo.com/traffic
Ogleo Discussion Forums - http://forum.ogleo.com

About Ogleo.com
===============
Ogleo.com is an integrated search tool which integrates various 
services to serve best of the web to its users. Ogleo word has been 
derived from word Ogle \O"gle\, n, which means to look at. At this 
time we have integrated 5 different services in Ogleo.com i.e. Web 
Results, Questions and Answers, Dictionary Definitions, Encyclopedia 
Content and Images.

Our Mission
Ogleo's aim is to integrate the information which is available with 
various content providers so that anyone can access the world's 
information in a single click.

Future Plans
In future we have planned to integrate more services in Ogleo.com e.g. 
News, Shopping, Photos, Videos, Whois, Jobs, Directories, Groups and 
Yellow Pages etc.

===Please don't forget to forward this message to your friends===
ALSO DON'T FORGET TO MAKE OGLEO.COM YOUR HOME PAGE

Thanks
Ogleo.com Team



From bearophileHUGS at lycos.com  Thu Jan 18 06:01:17 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 18 Jan 2007 03:01:17 -0800
Subject: A note on heapq module
In-Reply-To: <slrneqs6j1.l0.horpner@FIAD06.norwich.edu>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<45ad0f6c$1@nntp0.pdx.net>
	<1168982702.903306.152940@m58g2000cwm.googlegroups.com>
	<slrneqs6j1.l0.horpner@FIAD06.norwich.edu>
Message-ID: <1169118077.035345.321580@11g2000cwr.googlegroups.com>

Neil Cerutti:
> One more idea, cribbed from the linked list thread elsewhere: it
> might be nice if your Heap could optionally use an underlying
> collections.deque instead of a list.
> I don't know how excellent Python's deque is, but it's possible a
> deque would provide a faster heap than a contiguous array. C++'s
> std::deque is the default implementation of C++'s
> std::priority_queue for that reason (unless I'm confused again).

If you have some minutes you can do few speed tests and show us the
code and the timing results...

Bye,
bearophile



From collinstocks at gmail.com  Fri Jan  5 17:59:11 2007
From: collinstocks at gmail.com (Collin Stocks)
Date: Fri, 5 Jan 2007 17:59:11 -0500
Subject: I will be proposing this PEP
Message-ID: <4c0048df0701051459m7abf0662r69060ce9faff6bc4@mail.gmail.com>

Attached is a PEP which I will be proposing soon. If you have any questions,
comments, or suggestions, please email them to me with the subject "Adding
Built-in Class Attributes PEP"
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070105/25805a38/attachment.html>
-------------- next part --------------
PEP: XXX
Title: Adding Built-in Class Attributes
Version: $Revision$
Last-Modified: $Date$
Author: Collin Stocks <subscriber 1 2 3 at gmail dot com>
Status: Draft
Type: Standards Track
Content-Type: text/plain
Created: 03-Jan-2007
Python-Version: 2.6
Post-History:


Abstract

    Python currently allows users to create their own __setattr__,
    __getattr__ and __delattr__ member functions inside a class.  This is
    all well and dandy, but it causes programmers to have to find a
    different way to set, get, and delete attributes within those
    functions.  In __delattr__ and __getattr__, this usually is not a
    problem, because you can just get or delete those from __dict__, the
    built-in dictionary in a class.  __setattr__ is more of a problem,
    because, if self.my_attr does not exist,
    self.__dict__['my_attr']="some value" raises an exception.  This PEP
    proposes to add __setattr__, __getattr__ and __delattr__ as built-in
    member functions of all Python class objects.


Rationale

    Many programs that use classes need to create their own __setattr__,
    __getattr__ and __delattr__ member functions.  If not done carefully,
    this can cause recursion errors (something that increases the learning
    curve for newbies).  This is also not very object oriented.  Really, does
    it make sense to use objects of two different types to refer to the
    same object? This PEP does not propose to remove __dict__, just to add
    a more sensical way to access the attributes of a class.  This will
    prevent recursion, make Python code make more sense and introduce a
    more object oriented and correct way of handling class attributes.


Specification:

    Any class created by a Python file will have the __setattr__,
    __getattr__ and __delattr__ member functions built into it upon
    initiation.  This would allow programmers to create copies of these
    functions, and then create their own, which call on the copies in order
    to change attributes.  For example, suppose you wanted to make the
    attribute readOnlyAttr read-only:

    In the current version of Python, you must do something like this:

        class blah:
            def __init__(self):
                self.readOnlyAttr=1
            def __setattr__(self,name,value):
                try:
                    assert name=="readOnlyAttr"
                    print 1
                    self.__dict__[name]
                    print 2
                    raise TypeError, "Cannot change a readonly attribute"
                except KeyError:
                    self.__dict__[name]=value
                except AssertionError:
                    self.__dict__[name]=value

    The downside to this is obvious: This is an enormous amount of code to
    do a simple thing, and must be cleverly thought out.  Most would say
    that this is not Pythonic.  Here is what that code would look like
    following this proposal:

        class blah:
            def __init__(self):
                self.readOnlyAttr=1
                self.save_setattr=self.__setattr__ #makes a copy of the
                #                            previous, built-in __setattr__()
            def __setattr__(self,name,value): #this function is created
                #                            after __init__() has been called
                if name=="readOnlyAttr":
                    raise TypeError, "Cannot change a readonly attribute"
                else:
                    self.save_setattr(name,value)

    This code is much smaller and more readable.  It also does not use
    __dict__[], which is a dictionary representation of the class.  Since
    blah().__dict__ and blah() refer to the same object in the current
    version of Python, we are not able to take full advantage of object
    orientation, because this causes class objects to really have two
    different types.  This PEP does not propose to remove __dict__[] (maybe
    in Python 3000 __dict__[] will be removed); It just proposes a way to
    take a fuller advantage of object orientation.

    Another example: Suppose you wanted to create your own __setattr__()
    member function, but you were deriving your class from another class
    that may or may not have that member function already.  Suppose also,
    that you want to use that function after filtering through your own
    __setattr__() member function.  This is how that might be done in the
    current version of Python:

        class blah(derivitive):
            def __init__(self):
                try:
                    self.save_setattr=self.__setattr__
                    self.__setattr__=self.new_setattr
                except:
                    self.__setattr__=self.new_setattr
            def new_setattr(self,name,value):
                #...
                #code block
                #...
                try:
                    self.save_setattr(name,value)
                except:
                    self.__dict__[name]=value

    The obvious downside to this, is again, that it is too long, and it is
    not pythonic.  It is in fact, quite the reverse: clever.  A newbie would
    never think up that code! Here is what that code would look like
    following this proposal:

        class blah(derivitive):
            def __init__(self): #this saves a copy of the old __setattr__
                #               member function, whether it is the original
                #               built-in one, or the one that was derived
                self.save_setattr=self.__setattr__
            def __setattr__(self,name,value): #this function is created after
                #                             __init__() has been called
                #...
                #code block
                #...
                self.save_setattr(name,value) #this calls the previously
                #                        active __setattr__() member function

    This code is also much smaller and more readable! Better yet, it looks
    almost exactly the same as the proposed code in the last example! All a
    newbie needs to see is one example of how to use the __setattr__()
    member function, and s/he is able to make it do whatever s/he wants,
    without having to learn all about the try/except blocks, or even much
    about manipulating function objects.

    This proposal also applies the same concept to the __getattr__() and
    __delattr__() member functions.  Here is an example class that follows
    through with the same concept as before:

    class blah(derivitive):
        def __init__(self):
            self.save_setattr=self.__setattr__
            self.save_getattr=self.__getattr__
            self.save_delattr=self.__delattr__
        def __setattr__(self,name,value): #this function is created after
            #                             __init__() has been called
            #...
            #code block
            #...
            self.save_setattr(name,value) #this calls the previously active
            #                             __setattr__() member function
        def __getattr__(self,name): #this function is created after
            #                       __init__() has been called
            #...
            #code block
            #...
            return self.save_getattr(name) #this calls the previously
            #                          active __getattr__() member function
        def __delattr__(self,name): #this function is created after
            #                       __init__() has been called
            #...
            #code block
            #...
            self.save_delattr(name) #this calls the previously active
            #                       __delattr__() member function

    This is so much simpler than in the current version of python! This
    proposal avoids recursion, and gives a more logical and direct way to
    get around the problems caused by __getattr__(), __setattr__() and
    __delattr__().

    Something that has not been mentioned previous to this, but was shown
    in the examples, was that __init__() was called BEFORE the functions
    __getattr__(), __setattr__() and __delattr__() below it were created.
    This sort of turns __init__() into a "magic" member function, as it is
    called after everything above it was created, and before the
    aforementioned member functions below it were created.  This may cause
    some incompatability issues which will be resolved later under
    <Backwards Compatability>.


Motivation:

    In the current version of Python, the problems caused by __getattr__(),
    __setattr__() and __delattr__() are a pain to get around.  For example,
    when they are created, they immediatly overwrite any __getattr__(),
    __setattr__() or __delattr__() member functions that were derived from
    other classes.  As shown in the specification, there are ways to get
    around this, but they are very newbie unfriendly; they require a much
    more detailed knowledge of the language to find.  This PEP proposes a
    way in which it takes a minimal knowledge of Python in order to be able
    to write classes which take advantage of the __getattr__(),
    __setattr__() and __delattr__() member functions.

    Also, in the current version of Python, __getattr__(), __setattr__()
    and __delattr__() are easy causes of recursion errors.  This PEP
    proposes a way in which it is more difficult to make the mistake of
    causing a recursion error.  And, since the code needed to make
    __getattr__(), __setattr__() and __delattr__() work is less, if a
    recursion error is caused, it is much easier to find and fix than with
    the current version of Python.


Backwards Compatability:

    Since __init__() in class objects is called before any __getattr__(),
    __setattr__() and __delattr__() member functions that appear below it
    are created, the following things done by __init__() may not behave as
    expected in older programs:

        setting an attribute
        getting an attribute
        deleting an attribute
        referencing __getattr__(), __setattr__() and __delattr__() member
            functions

    These incompatabilities, however, are only a problem if __getattr__(),
    __setattr__() and/or __delattr__() have been written below where the
    __init__() member function has been written.  A solution that comes to
    mind is to evaluate, but not run, __init__() to see if there are still
    any references to each of the original (meaning built-in or derived)
    __getattr__(), __setattr__() and __delattr__() member functions.  For
    each one, if there still is a reference, then the the original member
    function is kept; if there isn't still a reference, then the original
    member function is discarded, and the new member function is used in
    its place.  The __init__() function is then called with the decided
    class namespace.  This is only a minor incompatability, and others are
    welcome to suggest their own solutions to this problem.

    Another possible solution to this problem is to simply leave __init__()
    alone, and include another special member functions of all classes that
    is called immediately after all of the functions above it have been
    created, but before any of the code below it has been interpreted.  This
    function's name would be __setup__().  This is a fitting name, because
    it is able to control the way that the class is created, before the
    class has initialized.  This only leaves a minute incompatability, if
    someone for some reason decided in an older program to put the
    __setup__() function in their class.


Copyright

    This document has been placed in the public domain.




Local Variables:
mode: indented-text
indent-tabs-mode: nil
sentence-end-double-space: t
fill-column: 70
coding: utf-8
End:

From steveo at syslang.net  Tue Jan  9 13:23:49 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Tue, 9 Jan 2007 13:23:49 -0500 (EST)
Subject: Question about using "with"
Message-ID: <Pine.LNX.4.64.0701091256501.25764@saturn.syslang.net>

>From the tutorial, they said that the following construct will 
automatically close a previously open file descriptor:

-------------------
#! /usr/bin/python
import sys

for nn in range ( 1, len(sys.argv ) ):
     print "arg ", nn, "value = ", sys.argv[nn]
     with open(sys.argv[nn]) as f:
         for line in f:
             print line,
------------------

but when I run it (with args) I get:

591 > ./cat.py cat.py
   File "./cat.py", line 6
     with open(sys.argv[nn]) as f:
             ^
SyntaxError: invalid syntax
592 >

This example came from http://docs.python.org/tut/node10.html down in 
section 8.7

Am I missing something?

TIA

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From dakman at gmail.com  Mon Jan 22 10:06:02 2007
From: dakman at gmail.com (dakman at gmail.com)
Date: 22 Jan 2007 07:06:02 -0800
Subject: module check
In-Reply-To: <1169477715.178874.223290@51g2000cwl.googlegroups.com>
References: <1169477715.178874.223290@51g2000cwl.googlegroups.com>
Message-ID: <1169478362.573925.37760@l53g2000cwa.googlegroups.com>

I'm at work so I can't test this, but I do beleive the inspect module
can help you out. If it can't you can always try import the module
in a try-catch statement, catching ImportError, however ImportError may
be raised if the module you imported has trouble loading another
module, but it shouln't be to hard to track down where the ImportError
came from, a traceback object can give a lot more information than you
would beleive.
Victor Polukcht wrote:
> Can anybody suggest a correct way of checking in python module exists
> and correctly installed from python program.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Jan 31 12:29:04 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 31 Jan 2007 18:29:04 +0100
Subject: Python **kwargs ?
In-Reply-To: <1170263432.199403.175290@k78g2000cwa.googlegroups.com>
References: <1170263432.199403.175290@k78g2000cwa.googlegroups.com>
Message-ID: <45c0d194$0$6737$426a74cc@news.free.fr>

johnny a ?crit :
> What is **kwargs mean in python?  When you put double **, does it mean
> passing by reference?

Nope.

Python as support for both positional (*args) and named (**kwargs) varargs.

> For example:
> def redirect_to(request, url, **kwargs):

means that redirect_to expect a positional 'request' arg, a positional 
'url' argument, and any other arbitrary named arguments.

You'll find all relevant doc in the FineManual(tm):
http://www.python.org/doc/current/tut/node6.html#SECTION006720000000000000000

HTH



From kloro2006 at gmail.com  Sat Jan 27 21:32:29 2007
From: kloro2006 at gmail.com (tom arnall)
Date: Sat, 27 Jan 2007 18:32:29 -0800
Subject: working model of a microcoded computer 
Message-ID: <45c3b3a0$0$16272$88260bb3@free.teranews.com>


This is somewhat off topic, but I think many programmers would be
interested to look at a working model of a microcoded computer at:

? ? ? ? tomspages.com
? ? ? ? 
click on the link for 'Hack the Com puter Model.' It conveys among other
things the physical events that underlie execution of a microcode
instruction and, by extension, of machine language.

I would like very much to get people's feedback on the thing.

Thanks,

tom arnall
north spit, ca
usa


-- 
Posted via a free Usenet account from http://www.teranews.com



From bignose+hates-spam at benfinney.id.au  Fri Jan 19 20:37:06 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 20 Jan 2007 12:37:06 +1100
Subject: float comparison confusion
References: <1169250923.146916.206430@s34g2000cwa.googlegroups.com>
Message-ID: <87odou4gxp.fsf@benfinney.id.au>

"chrolson at gmail.com" <chrolson at gmail.com> writes:

> Type "help", "copyright", "credits" or "license" for more information.
> >>> cmp(20.10, 20.9)
> -1
>
> Why is cmp returning -1 instead of returning positive integer?

    >>> 20.10 < 20.9
    True
    >>> 20.1 < 20.9
    True
    >>> 20.10 == 20.1
    True

What leads you to expect otherwise?

-- 
 \      "A society that will trade a little liberty for a little order |
  `\    will lose both, and deserve neither."  -- Thomas Jefferson, in |
_o__)                                              a letter to Madison |
Ben Finney



From deets at nospam.web.de  Wed Jan  3 10:53:22 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 03 Jan 2007 16:53:22 +0100
Subject: C/C++, Perl, etc. to Python converter
References: <G3Qmh.94$9v1.124@nntpserver.swip.net>
Message-ID: <5021riF1e2347U1@mid.uni-berlin.de>

mm wrote:

> 
> Is there a Perl to Python converter?
> Or in general: a XY to Python converter?
> 
> Is see, that Python is much better then Perl anyway.
> But for beginners, they whant to konw how is this done with Python etc.
> 
> Sure, there are some docus out there in the internet. But a converter?

Nope. Different languages have different idioms, translating them to each
other - while technically possible, at least to some extend - won't result
in anything that a human being can work with.

Diez


From david at boddie.org.uk  Wed Jan 24 16:43:42 2007
From: david at boddie.org.uk (David Boddie)
Date: 24 Jan 2007 13:43:42 -0800
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <xqxfya0n19v.fsf@cola3.ca.boeing.com>
References: <ep60jp$63v$1@aioe.org><ep64ic$epi$1@aioe.org>
	<45b69f63$0$24463$88260bb3@free.teranews.com>
	<mEJth.20273$bH4.2768@tornado.fastwebnet.it>
	<mailman.3089.1169652763.32031.python-list@python.org>
	<xqxfya0n19v.fsf@cola3.ca.boeing.com>
Message-ID: <1169675022.054728.76610@a75g2000cwd.googlegroups.com>

On Jan 24, 11:54 am, Harry George <harry.g.geo... at boeing.com> wrote:

> It is all interpretation -- even after some cases have wandered
> through the courts.  Mostly the trolltech statements indicate their
> intent to sue.  That right there tells me I want to go elsewhere.

Well, one could alternatively read the GPL, look at the FSF FAQs,
consult a lawyer, or talk to the Trolltech salespeople. I'd suggest to
the original poster that they do one or more of those things instead
of relying on your interpretation and guesswork.

David



From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 13 14:09:09 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 14 Jan 2007 06:09:09 +1100
Subject: Boilerplate in rich comparison methods
References: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>
	<7x8xg71j3t.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.01.13.19.09.09.242271@REMOVE.THIS.cybersource.com.au>

On Fri, 12 Jan 2007 23:28:06 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
>> class Parrot:
>>     def __eq__(self, other):
>>         return self.plumage() == other.plumage()
>>     def __ne__(self, other):
>>         return self.plumage() != other.plumage()
>>     def __lt__(self, other):
>>         return self.plumage() < other.plumage()

[snip more boilerplate code]

> If it's that uniform I think you can just use __cmp__:

Good point -- I had somehow picked up the mistaken idea that __cmp__ was
depreciated in favour of rich comparisons.


-- 
Steven.



From dfh at forestfield.co.uk  Wed Jan  3 06:45:08 2007
From: dfh at forestfield.co.uk (David Hughes)
Date: 3 Jan 2007 03:45:08 -0800
Subject: Using codecs.EncodedFile() with Python 2.5
Message-ID: <1167824708.700486.249020@h40g2000cwb.googlegroups.com>

I used this function successfully with Python 2.4 to alter the encoding
of a set of database records from latin-1 to utf-8, but the same
program raises an exception using Python 2.5. This small example shows
the problem:

import codecs
fo = open('test.dat', 'w')
fo.write('G\xe2teaux')
fo.close()

fi = open("test.dat",'r')
fx = codecs.EncodedFile(fi, 'utf-8', 'latin-1')
astring = fx.readline()
print astring
ustring = unicode(astring, 'utf-8' )
print repr(ustring)
print ustring.encode('latin-1')
print ustring.encode('utf-8')

Python 2.4 gives:

G??teaux
u'G\xe2teaux'
G?teaux
G??teaux

which I believe is correct, while 2.5 produces

Traceback (most recent call last):
  File "test_codec.py", line 8, in <module>
    astring = fx.readline()
  File "C:\Python25\lib\codecs.py", line 709, in readline
    data = self.reader.readline()
  File "C:\Python25\lib\codecs.py", line 471, in readline
    data = self.read(readsize, firstline=True)
  File "C:\Python25\lib\codecs.py", line 418, in read
    newchars, decodedbytes = self.decode(data, self.errors)
UnicodeDecodeError: 'utf8' codec can't decode bytes in position 1-3:
invalid data

Is there a genuine problem here, or have I been misusing this function?
--
Regards
David Hughes



From joshua at eeinternet.com  Fri Jan  5 19:44:01 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Fri, 05 Jan 2007 15:44:01 -0900
Subject: Doing date/time + TZ math in python
Message-ID: <459ee41c$0$4805$88260bb3@free.teranews.com>

I've read docs (datetime, time, pytz, mx.DateTime), googled, and
experimented.  I still don't know how to accomplish what I want to
accomplish.

I'm loading up a bunch of date/time data that I then need to do math on to
compare it to the current date/time.  I can get the current time easily
enough:

currentTime = datetime.datetime.now(pytz.timezone('America/Anchorage'))

Then, I want to import data/time pairs that are in "%Y-%m-%d %H:%M:%S"
format.

So, I do:

For each loop, extract time data, blah, blah, then:
readingTime = datetime.datetime(rYr, rMo, rDay, rHr, rMin, rSec,
tzinfo=pytz.timezone('America/Anchorage'))

The problem is, how do I create a datetime object and tell it that it's
America/Anchorage *daylight savings time* instead of whatever the system is
currently set at?  pytz only has America/Anchorage, and I saw no way to
tell it explicitly that the timezone is in Daylight instead of Standard
time (e.g. using AKST vs. AKDT for the time zone).

I'm sure there is a way to do it, and I'm sure it's quite simple, but it
hasn't jumped out at me yet.  Is there a module that I haven't seen that
would be better suited for this?

Thanks!

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From gert.cuykens at gmail.com  Mon Jan 15 19:48:05 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Tue, 16 Jan 2007 01:48:05 +0100
Subject: for v in l:
Message-ID: <ef60af090701151648p4e897233w7ca98afbc6b9184@mail.gmail.com>

is there a other way then this to loop trough a list and change the values

        i=-1
        for v in l:
                i=i+1
                l[i]=v+x

something like

        for v in l:
                l[v]=l[v]+x


From codecraig at gmail.com  Wed Jan 24 12:18:38 2007
From: codecraig at gmail.com (abcd)
Date: 24 Jan 2007 09:18:38 -0800
Subject: Thoughts on using isinstance
In-Reply-To: <mailman.3087.1169652310.32031.python-list@python.org>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<mailman.3077.1169645738.32031.python-list@python.org>
	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>
	<mailman.3087.1169652310.32031.python-list@python.org>
Message-ID: <1169659118.685902.197390@v45g2000cwv.googlegroups.com>

Well my example function was simply taking a string and printing, but
most of my cases would be expecting a list, dictionary or some other
custom object.  Still propose not to validate the type of data being
passed in?

Thanks.



From __peter__ at web.de  Tue Jan  2 04:16:30 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 02 Jan 2007 10:16:30 +0100
Subject: doctesting
References: <mailman.2196.1167726381.32031.python-list@python.org>
Message-ID: <end7qg$kf1$02$1@news.t-online.com>

belinda thom wrote:

> I'd like to write a tester script that I can place in one place (say
> ~/bin/python/tester.py) and then have it visible to me at the cmd-
> line (by setting the path  variable appropriately). I have had no
> luck in getting it to work, however.
> 
> It appears like the doctest code itself assumes that all modules to
> be imported lie in some directory other than the one I invoked the
> tester.py script from. In particular, simple imports in a .txt file
> like:
> 
>    >>> import foo
> 
> fail even though I've started the script in a directory that contains
> file foo.py
> 
> I only achieve success when I manually copy tester.py into this same
> directory (symlinks don't fix the problem).
> 
> This is a real drag b/c it means I have to copy this tester.py
> routine into _every_ directory that contains a .txt python unit test
> file. From a code-reuse point of view, this is pretty hideous...

For an executable script to be reachable its path must be listed in the PATH
environment variable whereas Python's import mechanism relies on PYTHONPATH
(and ultimately on sys.path).

http://docs.python.org/tut/node8.html#SECTION008110000000000000000

Peter


From not at set.se  Tue Jan 23 18:09:07 2007
From: not at set.se (Daniel)
Date: Wed, 24 Jan 2007 00:09:07 +0100
Subject: My python programs need a GUI, wxPython or PyQt4?
References: <ep60jp$63v$1@aioe.org>
Message-ID: <ep64ic$epi$1@aioe.org>

I've downloaded both the wxPython and the PyQt4 package, and by the 
first impression I must say that the PyQt4 system had a very 
compelling presentation. From what I can understand from the feedback 
I've gotten so far is that the wxPython is a better choice when it 
comes to compability (with linux), and it's free even if I want to 
create applications and sell them.
So, from what I understand I will have to go with PyQt4 since (from 
my understanding):
1. I will not sell the applications I'm working with since they will 
only be used by the internal QA at a computer game company. 
2. There seems to be a lot of documentation available for PyQt4. 
3. PyQt4 seems to be easier to learn.
4. My programs does not need to support Linux or Unix. 
Or am I wrong? Flame people, for the love of God, flame!! :)

-Daniel


From researchbase at gmail.com  Fri Jan 19 08:18:13 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Fri, 19 Jan 2007 18:48:13 +0530
Subject: confused on python rpc with apache, is it possible?
Message-ID: <f81479dd0701190518re0e94efmff6694c394c7694f@mail.gmail.com>

hello all.
I will like to know if the following combination is possible.
I have looked around on google and did not find any thing productive
so bothering the list: sorry.
I am developing a distributed application which will have 3 layers
namely the thin client written in wxpython, an application layer on a
server and a database server of course.  database and application
server will be on same physical machine.
what I want to know is if I can use python as the base for developing
the application layer as an rpc server  and use apache server to
handle http remote procedure requests from the client?
if yes then what basic configuration settings I will need?
I believe I must first have apache recognise python interpreter and
then do some settings in apache so that it knows that what is
happening is not a web page request but an xml-rpc application created
in python.
can some one guide me?
thanks
Krishnakant.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Jan 11 12:11:06 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 11 Jan 2007 18:11:06 +0100
Subject: Learning Python book, new edition?
References: <mailman.2580.1168528978.32031.python-list@python.org>
Message-ID: <50n9daF1g30l4U1@mid.individual.net>

Demel, Jeff wrote:

> Does anyone know if there's a plan in the works for a new edition
> of Learning Python?  The current edition (2nd) is a few years old
> and looks like it only covers Python 2.3.

IIRC, differences to 2.4 are in it, too.

> This email is intended only for the individual or entity to which
> it is addressed.  

Mails are _by_definition_ intended only for the addressee. :)

Regards,


Bj?rn

-- 
BOFH excuse #57:

Groundskeepers stole the root password



From richfahey at gmail.com  Wed Jan 24 14:26:09 2007
From: richfahey at gmail.com (Rich)
Date: 24 Jan 2007 11:26:09 -0800
Subject: newbie - returned values from cscript.exe
Message-ID: <1169666769.242698.70730@j27g2000cwj.googlegroups.com>

I am writing my first python script and I'm guessing this is something
obvious but I can't find any examples of doing something like this.  I
have a python script that is running a vbscript through cscript.exe.
The vbscript looks up a server name, username, password etc and returns
these values in a delimited list using wscript.echo.  I can assign
these values to variables using a Windows batch files with the
following code

FOR /F "tokens=1-6" %%a in ('cscript /nologo GetServerAccessInfo.vbs"')
do (
	SET DB_SERVER_NAME=%%a
	SET DB_NAME=%%b
	SET NMDBO_USERNAME=%%c
	SET NMDBO_PASSWORD=%%d
	SET SU_USERNAME=%%e
	SET SU_PASSWORD=%%f

I can't figure out how to do the same thing using a python script to
call this instead of a batch file.

I am running the vbscript by using the following command
os.system('cscript /nologo GetServerAccessInfo.vbs')



From CRhode at LacusVeris.com  Mon Jan  8 11:12:01 2007
From: CRhode at LacusVeris.com (Chuck Rhode)
Date: Mon, 8 Jan 2007 10:12:01 -0600
Subject: help: code formatter?
In-Reply-To: <entknh$8onl$1@zam602.zam.kfa-juelich.de>
References: <entknh$8onl$1@zam602.zam.kfa-juelich.de>
Message-ID: <20070108161200.GA5048@loki>

siggi wrote this on Mon, Jan 08, 2007 at 03:33:21PM +0100.  My reply is below.

> Is there a simple code formatter that first removes all indentations
> and then refomats correctly?

Why, yes, there is:

  http://lacusveris.com/PythonTidy/PythonTidy.python

-- 
.. Chuck Rhode, Sheboygan, WI, USA
.. 1979 Honda Goldwing GL1000 (Geraldine)
.. Weather:  http://LacusVeris.com/WX
.. 26? ? Wind W 17 mph



From gheissenberger at gmail.com  Thu Jan 11 18:42:07 2007
From: gheissenberger at gmail.com (gheissenberger at gmail.com)
Date: 11 Jan 2007 15:42:07 -0800
Subject: Python nuube needs Unicode help
In-Reply-To: <50nv1uF1hje7oU1@mid.uni-berlin.de>
References: <1168550858.233814.292900@p59g2000hsd.googlegroups.com>
	<50nv1uF1hje7oU1@mid.uni-berlin.de>
Message-ID: <1168558927.031778.240940@i56g2000hsf.googlegroups.com>

  Progress! You managed to change the error message.

  File "./acc_test_script_generator.py", line 106, in loadData
    print u.encode('utf-8')
AttributeError: Utterance instance has no attribute 'encode'

I'm missing somethign really obvious here, but I don't know what it
is...


Diez B. Roggisch wrote:
> gheissenberger at gmail.com schrieb:
> > HELP!
> > Guy who was here before me wrote a script to parse files in Python.
> >
> > Includes line:
> > print u
> > where u is a line from a file we are parsing.
> > However, we have started recieving data from Brazil. If I open file to
> > parse in VI, looks like:
> >
> > <Utt id="3" transcribe="yes" audioRoot="A1"
> > audio="313-20070102144528.wav" grammarSet="G3" rawText="n&#227;o"
> > recValue="{data:CHOICE=NO;}" conf="970" rawText2="" conf2="0"
> > transcribedText="n&#227;o" parsableText="n&#227;o"/
> >
> > Clearly those "n&#227" are some non-Ascii characters, but how do I get
> > print to understand that?
> >
> > I keep getting:
> > "UnicodeEncodeError: 'ascii' codec can't encode character u'\xe3' in
> > position 40:
> >  ordinal not in range(128)"
> >
>
> Does the error happen at the
>
> print u
>
> line? If yes, what happens is that you try and print a unicode object.
> Which means that it has to be converted (actually the right term is
> encoded) to a byte-string. If you don't do that explicitely, it will be
> done implicitly, using the default encoding - which is ascii.
>
> If you have non-ascii characters, you end up with the error you see.
>
> What to do? Use something like this:
> 
> print u.encode('utf-8')
> 
> instead.
> 
> Diez



From bthom at cs.hmc.edu  Fri Jan  5 04:11:02 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Fri, 05 Jan 2007 01:11:02 -0800
Subject: checking one's type
In-Reply-To: <7.0.1.0.0.20070105060049.05c1e270@yahoo.com.ar>
References: <E90C7F6E-5200-4553-9C39-8941999588B2@cs.hmc.edu>
	<7.0.1.0.0.20070105060049.05c1e270@yahoo.com.ar>
Message-ID: <2E261C28-2E4A-413D-91B0-34D04B160821@cs.hmc.edu>

thanks :-)

On Jan 5, 2007, at 1:05 AM, Gabriel Genellina wrote:

> At Friday 5/1/2007 05:40, belinda thom wrote:
>
>> I've been using the following hack to determine if a type is
>> acceptable and I suspect there is a better way to do it:
>
> This has been discussed today under the thread "Set type?", and a  
> few days ago as "type classobj not defined".
>
>
> -- 
> Gabriel Genellina
> Softlab SRL
>
> 	
>
> 	
> 		
> __________________________________________________ Pregunt?.  
> Respond?. Descubr?. Todo lo que quer?as saber, y lo que ni  
> imaginabas, est? en Yahoo! Respuestas (Beta). ?Probalo ya! http:// 
> www.yahoo.com.ar/respuestas
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From http  Thu Jan 25 07:35:13 2007
From: http (Paul Rubin)
Date: 25 Jan 2007 04:35:13 -0800
Subject: My Tkinter Threading nightmare
References: <1169693266.209082.323310@a75g2000cwd.googlegroups.com>
	<7x1wljajgg.fsf@ruckus.brouhaha.com>
	<7xac07wzh2.fsf@ruckus.brouhaha.com>
	<1169726320.703566.272120@k78g2000cwa.googlegroups.com>
Message-ID: <7xejpjuvwe.fsf@ruckus.brouhaha.com>

half.italian at gmail.com writes:
> >              try:
> >                 func, args, kw = self.cmd_queue.get(block=False)
> >              except QueueEmpty:
> >                 return
> >              func (*args, **kw)

> 
> Thanks Paul.  That has made more sense than all of my scrounging
> combined, but I still need to mess around with the idea and code some.
> How can I put something like the window delete into the command queue?
> Isn't window.protocol() just binding the close window button to a
> function?

   self.progressWindow.protocol('WM_DELETE_WINDOW', self.callback)

becomes

   gui.cmd_queue.put(self.progressWindow.protocol,
                      ('WM_DELETE_WINDOW', self.callback))

where gui is the Window object containing your gui.

I think there are some recipes like this in ASPN, that give more
detail about how to do this stuff.


From webb.sprague at gmail.com  Thu Jan  4 13:48:00 2007
From: webb.sprague at gmail.com (_)
Date: 4 Jan 2007 10:48:00 -0800
Subject: Set type?
Message-ID: <1167936480.882357.277320@v33g2000cwv.googlegroups.com>

How do you check to see if a variable is a set?  I would like to use

if type(var) is types.SetType:
   blah

but that is not available in types module.  I am using 2.4



From joncle at googlemail.com  Fri Jan  5 07:29:14 2007
From: joncle at googlemail.com (Jon Clements)
Date: 5 Jan 2007 04:29:14 -0800
Subject: Encoding / decoding strings
In-Reply-To: <1167999295.242042.79470@s34g2000cwa.googlegroups.com>
References: <1167999295.242042.79470@s34g2000cwa.googlegroups.com>
Message-ID: <1168000154.045319.122840@s34g2000cwa.googlegroups.com>


oliver at obeattie.com wrote:

> Hey Everyone,
>
> Was just wondering if anyone here could help me. I want to encode (and
> subsequently decode) email addresses to use in URLs. I believe that
> this can be done using MD5.
>
> I can find documentation for encoding the strings, but not decoding
> them. What should I do to encode =and= decode strings with MD5?
>
> Many Thanks in Advance,
> Oliver Beattie

Depends what you mean by "encode email addresses to use in URLs". MD5
is a cryptographic one-way hash function; it creates a 'finger print'
of the input data: given this, it's impossible to reproduce the
original input.

Is this what you're looking for?

>>> import urllib
>>> urllib.quote('some.person at somedomain.com')
'some.persons%40somedomain.com'

hth
Jon.



From asn_update at adobe.com  Mon Jan 15 05:44:10 2007
From: asn_update at adobe.com (asn_update at adobe.com)
Date: Mon, 15 Jan 2007 12:44:10 +0200
Subject: Mail System Error - Returned Mail
Message-ID: <auto-000010676897@dgp.ro>

The original message was received at Mon, 15 Jan 2007 12:44:10 +0200
from adobe.com [142.121.237.185]

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

----- Transcript of session follows -----
... while talking to 184.246.123.62:
554 <python-list at python.org>... Message is too large
554 <python-list at python.org>... Service unavailable


From ian.inglis at gmail.com  Thu Jan 18 09:12:17 2007
From: ian.inglis at gmail.com (Cruelemort)
Date: 18 Jan 2007 06:12:17 -0800
Subject: Catching wx events
Message-ID: <1169129536.879657.113130@v45g2000cwv.googlegroups.com>

Hello all,

I am new to this group (and new to Python) and was hoping someone would
be able to help me with something, it is not so much a problem it is
more of a general interest query about something i have a solution too
but am not sure it is the correct one.

I have a class that contains a string ID and a name, and a list
containing a few objects of this type, i need to loop through this list
and create a button for each object (with the name as the label) i have
done this with the following code -

                for chan in self._channellist:
                        channelbutton = wx.Button(self, id=-1,
label=chan.getName())

channelbutton.Bind(wx.EVT_BUTTON,self._channelChanged)

My question is this - in the _channelChanged method, how do i know
which button has been pressed when i enter the channel changed method,
and so how do i retrieve the appropriate object depending on which
button has been pressed?

I have potentially solved this problem using the UserData property in a
sizer, i have added all the buttons to a sizer for display purposes and
so SizerItem objects have been created, i can then set the original
object to the UserData object by putting the following line of code in
the loop

                        sizeritem =
self.topsizer.Add(channelbutton,0,wx.ALIGN_RIGHT, userData=chan)

This way i can retrieve the item in the _channelChanged method with the
following -

        def _channelChanged(self, event):
                eventobj = event.GetEventObject()
                chan = self.topsizer.GetItem(eventobj).GetUserData()


This works fine but by looking at the API it would appear the UserData
property is not really designed for this use ("userData - Allows an
extra object to be attached to the sizer item, for use in derived
classes when sizing information is more complex than the proportion and
flag will allow for").

Another option would be to derive my own Button class and include the
object in there.

Any advice on the best way to solve this problem would be appreciated.

Many thanks

Ian



From ptmcg at austin.rr.com  Thu Jan 25 23:07:16 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 25 Jan 2007 20:07:16 -0800
Subject: Pyparsing - Dealing with a Blank Value
In-Reply-To: <1169774005.890880.259830@j27g2000cwj.googlegroups.com>
References: <1169774005.890880.259830@j27g2000cwj.googlegroups.com>
Message-ID: <1169784435.941039.269240@k78g2000cwa.googlegroups.com>

On Jan 25, 7:13 pm, "Steve" <ste... at cruzio.com> wrote:
> Hi All,
>
> I've picked up thePyParsingmodule and am trying to figure out how to
> do a simple parsing of some HTML source code.  My specific problem is
> dealing with an <TD></TD> element that is blank.
>
<snip>
>
> Any assistance would be greatly appreciated!
>
> Steve

Just define a default value to be returned for MultiItem if the
Optional expression is not found:

    MultiItem = Optional(OneOrMore(dataItem),default="")

Define default to be whatever string you choose.

-- Paul



From steveo at syslang.net  Tue Jan  9 12:56:46 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Tue, 9 Jan 2007 12:56:46 -0500 (EST)
Subject: Question about compiling.
Message-ID: <Pine.LNX.4.64.0701091253500.25764@saturn.syslang.net>

I *just* read the tutorial so please be gentle. I created a file called 
fib.py which works very nicely thank you. When I run it it does what it's 
supposed to do but I do not get a resulting .pyc file. The tutorial says I 
shouldn't do anything special to create it. I have machines that have both 
2.4.1 and 2.3.5. Does anyone have an idea what to do?

TIA

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From gagsl-py at yahoo.com.ar  Tue Jan 30 19:15:55 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 21:15:55 -0300
Subject: Why don't have an object() instance a __dict__ attribute by
	default?
References: <004c01c744c6$c2cf5710$8600a8c0@ANNA>
Message-ID: <op.tmzsctdasd1mbx@gabriel2.softlabbsas.com.ar>

En Tue, 30 Jan 2007 20:31:26 -0300, L?tez? <letezo at fw.hu> escribi?:

> I use Python 2.5, Win32 MSI release.
>
> Setting attributes on an empty object does not work:
>
>>>> a=object()
>
>>>> a.x=1
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> AttributeError: 'object' object has no attribute 'x'
>
>
> However using an empty new style class works fine:
>
>>>> class C(object): pass
> ...
>>>> c=C()
>>>> setattr(c, 'x', 1)
>>>>
>
> The dir(c) function indicates, that the C instance has a __dict__  
> attribute.
>
> Why don't have an object() instance a __dict__ attribute by default?

Because it's not needed, and creating an empty dict has some cost. If you  
need a class with __dict__, just inherit from object as you already have  
noted.

> This may need some explanation in the Python manual.

Maybe.

-- 
Gabriel Genellina



From bbands at gmail.com  Fri Jan 26 17:37:34 2007
From: bbands at gmail.com (BBands)
Date: 26 Jan 2007 14:37:34 -0800
Subject: time series data and NumPy
In-Reply-To: <2007012611184275249-bob@passcalnmtedu>
References: <1169830757.220964.196540@m58g2000cwm.googlegroups.com>
	<51us3uF1mdcpsU1@mid.uni-berlin.de>
	<1169834042.396351.12660@h3g2000cwc.googlegroups.com>
	<2007012611184275249-bob@passcalnmtedu>
Message-ID: <1169851054.812214.27610@v45g2000cwv.googlegroups.com>

On Jan 26, 10:18 am, Bob Greschke wrote:

> You're using the Python-MySQL module mysqldb, right?

Actually I using MySQL with pyodbc as the mysqldb Windows binaries for
Python 2.5 aren't out yet. :-(

> You can select the data from the database and have
> MySQL do the conversion with an SQL command.
>
> select to_days(<your date column name here>),
> <your close column> from <your table>;

That works very nicely indeed.

Thanks,

    jab



From ptmcg at austin.rr.com  Thu Jan 25 02:57:00 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 24 Jan 2007 23:57:00 -0800
Subject: Simple Matrix class
In-Reply-To: <mailman.3116.1169673514.32031.python-list@python.org>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>
	<mailman.3049.1169600368.32031.python-list@python.org>
	<1169602411.917985.89840@l53g2000cwa.googlegroups.com>
	<mailman.3051.1169604934.32031.python-list@python.org>
	<1169617221.481444.135820@v45g2000cwv.googlegroups.com>
	<mailman.3094.1169659321.32031.python-list@python.org>
	<1169664540.120687.211350@s48g2000cws.googlegroups.com>
	<mailman.3108.1169668074.32031.python-list@python.org>
	<1169670271.547292.141110@l53g2000cwa.googlegroups.com>
	<mailman.3116.1169673514.32031.python-list@python.org>
Message-ID: <1169711820.690536.181280@m58g2000cwm.googlegroups.com>

On Jan 24, 3:18 pm, Robert Kern <robert.k... at gmail.com> wrote:
> Ill-conditioned matrices. You should grab a copy of _Matrix Computations_ by
> Gene H. Golub and Charles F. Van Loan.
>
> For example, try the Hilbert matrix n=6.
>
>   H_ij = 1 / (i + j - 1)
>

Sure enough, this gets ugly at n=6.

Thanks for the reference to Matrix Computations; I'll try to track down
a copy next time I'm at Half-Price Books.

Meanwhile, it's back to the day job...

-- Paul



From gagsl-py at yahoo.com.ar  Tue Jan  2 10:42:34 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 02 Jan 2007 12:42:34 -0300
Subject: Python embedded interpreter: how to initialize the interpreter ?
In-Reply-To: <1167573333.723607.199480@v33g2000cwv.googlegroups.com>
References: <1167573333.723607.199480@v33g2000cwv.googlegroups.com>
Message-ID: <7.0.1.0.0.20070102124112.03f97be0@yahoo.com.ar>

At Sunday 31/12/2006 10:55, ycollet at freesurf.fr wrote:

>I've written a C embedded application. I want to open a python gui
>application in my C program but when I do :
>
>PyRun_String( "import gui.py", file_input, pDictionary, pDictionary );
>
>the interpreter emits an error: tkinter module not defined

Does it work if you try it from the interpreter?


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From tactics40 at gmail.com  Mon Jan 22 19:10:51 2007
From: tactics40 at gmail.com (tac-tics)
Date: 22 Jan 2007 16:10:51 -0800
Subject: arrow keys don't work
In-Reply-To: <mailman.3009.1169507529.32031.python-list@python.org>
References: <1169506381.452422.179070@11g2000cwr.googlegroups.com>
	<mailman.3009.1169507529.32031.python-list@python.org>
Message-ID: <1169511051.114069.156600@a75g2000cwd.googlegroups.com>


Robert Kern wrote:
> tac-tics wrote:
> > I've noticed that in Python 2.5, the interactive prompt does not
> > support intelligent use of arrow keys like 2.4 did (up/down for
> > previous/next statement, left/right for moving the cursor). What
> > exactly is the reason for this and is there an easier fix than
> > downgradinig to 2.4? Thanks.
>
> Your installation of 2.4 probably had the readline module installed while your
> installation of 2.5 doesn't. What platform are you on?

Actually, I should have posted this a while ago. I've noticed it on
Ubuntu Linux, Mac OSX, and earlier today on Sun Solaris.

What do I need to do to install / configure readline?



From laurent.pointal at limsi.fr  Mon Jan 29 07:43:04 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 29 Jan 2007 13:43:04 +0100
Subject: Yank Bastards KILLED THEIR OWN PEOPLE to stage 911 DRAMA
In-Reply-To: <mailman.3228.1169887151.32031.python-list@python.org>
References: <1169837804.481376.5790@q2g2000cwa.googlegroups.com>
	<mailman.3228.1169887151.32031.python-list@python.org>
Message-ID: <epkq4i$8k3$1@news2.u-psud.fr>

bryan rasmussen a ?crit :
> See, if the python list mail server was written in Lisp Paul Graham
> would already have been able to write up a spam filter to ban this
> guy.
> 
> Seriously though,  shouldn't Thermate be banned by now.

I read this from comp.lang.python... and its very hard to ban people (or
better, ban out-of-subject posts) from non-moderated Usenet newsgroups.

A+

Laurent.


From steve at REMOVEME.cybersource.com.au  Mon Jan 22 19:18:44 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 23 Jan 2007 11:18:44 +1100
Subject: How to use time.clock() function in python
References: <1169503516.425217.218790@q2g2000cwa.googlegroups.com>
	<mailman.3007.1169505266.32031.python-list@python.org>
	<1169508778.101027.320760@11g2000cwr.googlegroups.com>
Message-ID: <pan.2007.01.23.00.18.44.164550@REMOVEME.cybersource.com.au>

On Mon, 22 Jan 2007 15:32:58 -0800, samuel.y.l.cheung wrote:

>   File "/usr/lib/python2.4/timeit.py", line 188, in repeat
>     t = self.timeit(number)
>   File "/usr/lib/python2.4/timeit.py", line 161, in timeit
>     timing = self.inner(it, self.timer)
>   File "<timeit-src>", line 6, in inner
> NameError: global name 'func1' is not defined
> 
> I don't understand why i can't find 'func1', when I call the function
> 'func1' directly, it works.
> but why when I call it within 'timeit', it can't find it?

Because the code in timeit is running in a different namespace. You have
to import your function first. That's what the setup parameter is used for.

Here's the hard way:

t = timeit.Timer("func1()", """def func1():
    #do something here
    return result
""")


Here's the easy way:

t = timeit.Timer("func1()", "from __main__ import func1")



-- 
Steven D'Aprano 



From kylotan at gmail.com  Tue Jan  2 05:52:53 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 2 Jan 2007 02:52:53 -0800
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <enavfb$1gn$1@news.albasani.net>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
	<enavfb$1gn$1@news.albasani.net>
Message-ID: <1167735173.884444.250750@k21g2000cwa.googlegroups.com>

robert wrote:
> Ben Sizer wrote:
> > My opinion is that this is not as big a problem as some may feel that
> > it is. Unlike Unix systems, the PATH variable is rarely used.
>
> It is a big problem.
>
> It is not less than the majority of Python users (at least those who do things on the command line) who deal with multiple Python versions.

So you think most Python users have more than one version of Python
installed? I disagree - but even if it is true, how come this isn't a
big problem on Unix? Can you name a single distribution that doesn't
install Python to the path?

> This would create funny PATH variables - almost a "psychic behavior with history".

It is quite trivial to see if Python is already on the path, and act
differently based on that.

> Windows is at all less a multi user system. I don't even know a case where two (Python) Programmers use _one_ box and then also want separate Python's - just know home mates (parasites) who occasionally share the web browser or so...

So... that's another reason why there's rarely a problem in setting
that PATH variable.

> Linking also a default python.exe into the system32 upon a (non-default) checkbox mark in the installer should be simple, clear and do everything what 99.9% want - and most "compatible" to *nix.

No, it doesn't : the /scripts directory is also important for many
Python packages and that isn't addressed by shifting python.exe into
system32.

-- 
Ben Sizer



From gherron at islandtraining.com  Tue Jan  2 17:25:49 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 02 Jan 2007 14:25:49 -0800
Subject: list/dictionary as case statement ?
In-Reply-To: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
References: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
Message-ID: <459ADBED.4080401@islandtraining.com>

Stef Mientki wrote:
> If I'm not mistaken, I read somewhere that you can use 
> function-names/references in lists and/or dictionaries, but now I can't 
> find it anymore.
>
> The idea is to build a simulator for some kind of micro controller (just 
> as a general practise, I expect it too be very slow ;-).
>
> opcodes ={
>    1: ('MOV', function1, ...),
>    2: ('ADD', function2, ),
>    3: ('MUL', class3.function3, )
>    }
>
> def function1
>    # do something complex
>
>
> Is this possible ?
>
> thanks,
> Stef Mientki
>   

Yes. Functions are (so called) first class objects. You can refer to one 
by name, and pass that reference around in variables and other data 
structures.

That said, your code above won't work as written because function1 is 
not in existence when you refer to it.

Here's some working code which manipulates a reference to a function 
then calls it:

 >>> def fn():
... print "Hello world!"
...
 >>> x = fn
 >>> y = [fn,fn]
 >>> z = {1:fn, 2:fn}
 >>>
 >>> x()
Hello world!
 >>> y[0]()
Hello world!
 >>> y[1]()
Hello world!
 >>> z[1]()
Hello world!
 >>> z[2]()
Hello world!
 >>>

Gary Herron




From timr at probo.com  Sun Jan 14 20:29:25 2007
From: timr at probo.com (Tim Roberts)
Date: Mon, 15 Jan 2007 01:29:25 GMT
Subject: Maths error
References: <mailman.2480.1168350033.32031.python-list@python.org><Xns98B384E126F4Ctim111one@216.196.97.136><eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136><eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org><eo7kdf$a80$1@gemini.csx.cam.ac.uk
	<eoabbl$270$1@gemini.csx.cam.ac.uk>
	<mailman.2709.1168753952.32031.python-list@python.org>
Message-ID: <f4mlq29t80pvvqbfm2ch2r2uf6tfnhlmnl@4ax.com>

"Hendrik van Rooyen" <mail at microcorp.co.za> wrote:

>"Nick Maclaren" <nmm1 at cus.cam.ac.uk> wrote:
>
>> What I don't know is how much precision this approximation loses when
>> used in real applications, and I have never found anyone else who has
>> much of a clue, either.
>> 
>I would suspect that this is one of those questions which are simple
>to ask, but horribly difficult to answer - I mean - if the hardware has 
>thrown it away, how do you study it - you need somehow two
>different parallel engines doing the same stuff, and comparing the 
>results, or you have to write a big simulation, and then you bring 
>your simulation errors into the picture - There be Dragons...

Actually, this is a very well studied part of computer science called
"interval arithmetic".  As you say, you do every computation twice, once to
compute the minimum, once to compute the maximum.  When you're done, you
can be confident that the true answer lies within the interval.

For people just getting into it, it can be shocking to realize just how
wide the interval can become after some computations.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From felipe.lessa at gmail.com  Wed Jan 10 06:11:58 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Wed, 10 Jan 2007 09:11:58 -0200
Subject: maximum number of threads
In-Reply-To: <7.0.1.0.0.20070110064655.0508d0a0@yahoo.com.ar>
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl>
	<7.0.1.0.0.20070110064655.0508d0a0@yahoo.com.ar>
Message-ID: <c2701f5c0701100311k63a8127bwbfd0086afa224bd3@mail.gmail.com>

On 1/10/07, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Wednesday 10/1/2007 04:38, Paul Sijben wrote:
> >Does anyone know what it going on here and how I can ensure that I have
> >all the threads I need?
>
> Simply you can't, as you can't have 10000 open files at once.
> Computer resources are not infinite.
> Do you really need so many threads? Above a certain threshold, the
> program total execution time may increase very quickly.

Maybe Stackless could help the OP?
http://www.stackless.com/

-- 
Felipe.


From kosh at aesaeion.com  Wed Jan 10 09:43:45 2007
From: kosh at aesaeion.com (William Heymann)
Date: Wed, 10 Jan 2007 07:43:45 -0700
Subject: maximum number of threads
In-Reply-To: <c2701f5c0701100611u69732112v8b5e4782d0944ba@mail.gmail.com>
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl>
	<eo2rl6$41s$1@upsn250.cri.u-psud.fr>
	<c2701f5c0701100611u69732112v8b5e4782d0944ba@mail.gmail.com>
Message-ID: <200701100743.45547.kosh@aesaeion.com>

On Wednesday 10 January 2007 7:11 am, Felipe Almeida Lessa wrote:
> ---
> $ python test.py
> 50
> 100
> 150
> 200
> 250
> 300
> 350
> Exception raised: can't start new thread
>
> Biggest number of threads: 382
> ---
>
> The test.py script is attached.

So you know I tried this on ubuntu edgy 64bit edition on a dual 2218 opteron 
system with 8G of ram and I got

<lots of output>
Exception raised: can't start new thread
Biggest number of threads: 32274


From sean at datafly.net  Tue Jan 16 20:19:02 2007
From: sean at datafly.net (Sean Schertell)
Date: Wed, 17 Jan 2007 10:19:02 +0900
Subject: Newbie: Capture traceback message to string?
Message-ID: <8E19FBD5-47DC-4FE3-9E5C-B143664CC846@datafly.net>

Hello!

I'm new to Python and this is my first post to the list.

I'm trying to simply capture exception text to a few strings which  
can be passed to a PSP page to display a pretty error message. The  
problem is that I just can't seem to figure out how to get the basic  
components of the traceback message into strings. Here's what I want  
to do:

---------------------
try:
	bad_math = 1/0
except:
	info = sys.exc_info()
	main_error_str = # ???
	full_traceback_str = # ???
	tmpl = psp.PSP(req, filename='error.html')
         tmpl.run({'main_error_str': main_error_str,  
'full_traceback_str':full_traceback_str})

return apache.OK
---------------------

...So then my PSP page receives the errors as variables containing  
strings.

I've been googling and experimenting for more hours than I care to  
admit. A little help please?

Thanks!

Sean




From jorge.vargas at gmail.com  Mon Jan  8 10:51:27 2007
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Mon, 8 Jan 2007 11:51:27 -0400
Subject: PDF rendering toolkit?
In-Reply-To: <509gkmF1eufvtU1@mid.uni-berlin.de>
References: <mailman.2348.1168030338.32031.python-list@python.org>
	<509gkmF1eufvtU1@mid.uni-berlin.de>
Message-ID: <32822fe60701080751r94a65eaxa8fb3a4344f678ef@mail.gmail.com>

On 1/6/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
> > I'm looking for a tool to take an actual .pdf file and display it in a
> > window (I'm using wxwidgets at the moment)
>
> No idea if there is a one-shot-kills-them-all solution out there - but
> if you have a way to go for windows, you might checkout PyQt and PyKDE
> to embed a kpfd-view in a window of yours.
>
> I agree that it is less than desirable to switch toolkits - but if you
> _have_ to...
>
yes indeed the problem with that is I want my code to be portable that
is the reason I'm working on top of wx.

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


From no-spam at no-spam-no-spam.invalid  Mon Jan  8 11:23:52 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Mon, 08 Jan 2007 17:23:52 +0100
Subject: Parallel Python
In-Reply-To: <Xns98B269DCC12Fduncanbooth@127.0.0.1>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
Message-ID: <entr6s$ovo$1@news.albasani.net>

Duncan Booth wrote:
> Laszlo Nagy <gandalf at designaproduct.biz> wrote:
> 
> 
> The 'parallel python' site seems very sparse on the details of how it is 
> implemented but it looks like all it is doing is spawning some subprocesses 
> and using some simple ipc to pass details of the calls and results. I can't 
> tell from reading it what it is supposed to add over any of the other 
> systems which do the same.
> 
> Combined with the closed source 'no redistribution' license I can't really 
> see anyone using it.


Thats true. IPC through sockets or (somewhat faster) shared memory -  cPickle at least - is usually the maximum of such approaches.
See http://groups.google.de/group/comp.lang.python/browse_frm/thread/f822ec289f30b26a

For tasks really requiring threading one can consider IronPython.
Most advanced technique I've see for CPython ist posh : http://poshmodule.sourceforge.net/ 

I'd say Py3K should just do the locking job for dicts / collections, obmalloc and refcount (or drop the refcount mechanism) and do the other minor things in order to enable free threading. Or at least enable careful sharing of Py-Objects between multiple separated Interpreter instances of one process.
.NET and Java have shown that the speed costs for this technique are no so extreme. I guess less than 10%. 
And Python is a VHLL with less focus on speed anyway.
Also see discussions in http://groups.google.de/group/comp.lang.python/browse_frm/thread/f822ec289f30b26a .


Robert


From bdesth.quelquechose at free.quelquepart.fr  Sun Jan  7 17:26:05 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 07 Jan 2007 23:26:05 +0100
Subject: [OT] (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <1168203678.193392.158600@i15g2000cwa.googlegroups.com>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
	<1168042215.514023.121560@s80g2000cwa.googlegroups.com>
	<1168048620.409190.85870@v33g2000cwv.googlegroups.com>
	<1168130960.670978.111850@s34g2000cwa.googlegroups.com>
	<45a12b07$0$300$426a74cc@news.free.fr>
	<1168203678.193392.158600@i15g2000cwa.googlegroups.com>
Message-ID: <45a16d3d$0$317$426a74cc@news.free.fr>

Martin Miller a ?crit :
> Bruno Desthuilliers wrote:
> 
>>Martin Miller a ?crit :
>>(snip)
>>
>>>Oh, contrair.
>>
>>I guess you mean "au contraire" ?-)
>>
>>(snip)
> 
> 
> FWIW "contrair" is how it's spelled in the Oxford English dictionary (I
> actually did look it up before posting because it seemed like there
> ought be an 'e' on the end).  The dictionary also says it's chiefly
> Scottish but the etymology indicates from the Old French "contraire".

Not that 'old' !-) It's still a common French word. "au contraire" is 
French for "on the contrary", and "au" is prononced 'o' - hence my mistake.


From S.Mientki-nospam at mailbox.kun.nl  Thu Jan 11 13:36:54 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Thu, 11 Jan 2007 19:36:54 +0100
Subject: globals accros modules
In-Reply-To: <45a66cea$0$289$426a34cc@news.free.fr>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>
	<mailman.2556.1168492539.32031.python-list@python.org>
	<3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>
	<45a66cea$0$289$426a34cc@news.free.fr>
Message-ID: <d8c17$45a683b2$d443bb3a$14354@news.speedlinq.nl>

Bruno Desthuilliers wrote:
> stef a ?crit :
>>
>>>
>>> Change a=1 to amodule.a=1
>>> If you find yourself doing tricks with the module globals, think 
>>> about redesigning your application.
>>>
>> Of course I completely agree with you.
>>
>> But ...
>> if you're moving from MatLab to Python,
>> and want to show your collegaes,
>> with how little effort they can reuse all their existing MatLab 
>> routines in Python,
>> then the global issue is a real pain !!
>>
>> You can explain your collegaes, that
>> - the startindex of arrays changes from 1 to 0
>> - slices are upto, instead of including the final border
>> - indention is th? key
>> And tell them about all beautiful things in Python,
>> but tell them that they are going to loose all their globals ???
> 
> It's a feature. Globals are definitively a BadThing(tm).
> 
>> cheers,
>> Stef Mientki
>>


From alexandre_irrthum at yahoo.com  Mon Jan 29 15:47:13 2007
From: alexandre_irrthum at yahoo.com (alexandre_irrthum at yahoo.com)
Date: 29 Jan 2007 12:47:13 -0800
Subject: Compiling extension with Visual C++ Toolkit Compiler - MSVCR80.dll
Message-ID: <1170103633.189538.216620@v45g2000cwv.googlegroups.com>

Hi there,

I am trying to install a Python library with a C extension (the 
Polygon library) and I am having a bad time. My Python version is 
Python 2.4.3 - Enthought Edition 1.0.0 (#69, Aug  2 2006, 12:09:59) 
[MSC v.1310 32 bit (Intel)] on Windows XP Pro. I have dutifully 
followed the instructions here:

http://wiki.python.org/moin/Building_Python_with_the_free_MS_C_Toolkit

i.e.,

- Installed Microsoft Visual C++ Toolkit Compiler 2003
- Installed Microsoft Platform SDK for Windows Server 2003 R2
- Installed Microsoft .NET Framework SDK, version 1.1
- setup the path, include and lib environment variables with a .bat 
file, as described in the wiki document

The library seems to build correctly (producing Polygon.py and 
cPolygon.pyd), but when I import it I get the following message from 
python.exe: "This application has failed to start because MSVCR80.dll 
was not found". I thought that this might be due to Python trying to 
link against  the .dll from Microsoft Visual C++ Express 2005, also 
installed on my PC, instead of MSVCR71.dll. So I've removed MS Visual C
++ Express 2005, and any trace of it from my environment variables, 
but that doesn't seem to change anything.

Any help would be greatly appreciated.

Regards,

alex



From bdesth.quelquechose at free.quelquepart.fr  Thu Jan 18 16:42:24 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 18 Jan 2007 22:42:24 +0100
Subject: Traversing the properties of a Class
In-Reply-To: <1169152688.921153.26150@m58g2000cwm.googlegroups.com>
References: <1169141253.332211.12790@38g2000cwa.googlegroups.com>
	<slrneqvgtv.r0.horpner@FIAD06.norwich.edu>
	<1169152688.921153.26150@m58g2000cwm.googlegroups.com>
Message-ID: <45afe338$0$318$426a74cc@news.free.fr>

EdG a ?crit :
(top-post corrected)
> 
> Neil Cerutti wrote:
> 
>>On 2007-01-18, EdG <edquichan at yahoo.com> wrote:
>>
>>>For debugging purposes, I would like to traverse the class
>>>listing out all the properties.
>>
>>This is the first thing that came to mind.
>>
>>def show_properties(cls):
>>  for attr in dir(cls):
>>    if isinstance(getattr(cls, attr), property):
>>      print attr
>>

 > This works great.  I have one more question.  Now that I have the name
 > of the property, how do I get it's value?
 >
 > I want to print  '%s = %s' % (attr,theattributesvalue)


Then you need to have the instance...

def list_properties(cls):
   return [
     name for name in dir(cls)
     if isinstance(getattr(cls, name), property)
   ]

def print_properties(obj):
   for name in list_properties(obj.__class__):
     print "%s : %s" % (name, str(getattr(obj, name)))



From steve at REMOVE.THIS.cybersource.com.au  Mon Jan 22 17:28:06 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 23 Jan 2007 09:28:06 +1100
Subject: How to use time.clock() function in python
References: <1169503516.425217.218790@q2g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.22.22.28.04.563838@REMOVE.THIS.cybersource.com.au>

On Mon, 22 Jan 2007 14:05:16 -0800, yinglcs at gmail.com wrote:

> Hi,
> 
> I am following this python example trying to time how long does an
> operation takes, like this:
> 
> My question is why the content of the file (dataFile) is just '0.0'?
> I have tried "print >>dataFile, timeTaken" or "print >>dataFile,str(
> timeTaken)", but gives me 0.0.
> Please tell me what am I missing?
> 
> 
>         t1 = time.clock()
>         os.system(cmd)
> 
>         outputFile = str(i) + ".png"
> 
>         t2 = time.clock()
> 
>         timeTaken = t2 - t1
>         allTimeTaken += timeTaken
>         print >>dataFile, timeTaken



For the correct way to time operations, see the timeit module.

For your specific problem, it is hard to tell what you are doing wrong
when you don't tell us what "datafile" is. What's "outfile" for? It gets
created *after* the command runs, but doesn't get used. 


-- 
Steven.



From scott.daniels at acm.org  Tue Jan 16 13:32:41 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Tue, 16 Jan 2007 10:32:41 -0800
Subject: A note on heapq module
In-Reply-To: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
Message-ID: <45ad0f6c$1@nntp0.pdx.net>

bearophileHUGS at lycos.com wrote:
> In few minutes I have just written this quite raw class, ....
I'd suggest some changes.  It is nice to have Heaps with equal
contents equal no matter what order the inserts have been done.
Consider how you want Heap([1, 2, 3]) and Heap([3, 1, 2]) to behave.
Similarly, it is nice to have str and repr produce canonical
representations (I would skip the __str__ code, myself, though).
Also, subclasses should get their identities tweaked as so:

> class Heap(object):
>     ...
>     def sort(self, cmp=None, key=None):
>         self.h.sort(cmp=cmp, key=key)
I'd remove this method.
>     ...
>     def __eq__(self, other):
>         return isinstance(other, Heap) and self.h == other.h
           return isinstance(other, self.__class__) and sorted(
                                      self.h) == sorted(other.h)
>     def __ne__(self, other):
>         return not isinstance(other, Heap) or self.h != other.h
           return not isinstance(other, self.__class__) and sorted(
                                      self.h) != sorted(other.h)
>     ...
>     def __str__(self):
>         return str(self.h)
           return str(sorted(self.h))
>     def __repr__(self):
>         return "Heap(%s)" % self.h if self.h else "Heap()"
           return "%s(%s)" % (self.__class__.__name__, sorted(self.h))
And I'd add:
       def __lt__(self, other):
           raise TypeError('no ordering relation is defined for %s'
                           % self.__class__.__name__)
       __gt__ = __le__ = __ge__ = __lt__

--Scott David Daniels
scott.daniels at acm.org


From Terry.McKenna at gmail.com  Thu Jan 11 12:11:40 2007
From: Terry.McKenna at gmail.com (Tmack)
Date: 11 Jan 2007 09:11:40 -0800
Subject: COM compatibility
Message-ID: <1168535500.394266.10860@i39g2000hsf.googlegroups.com>

I'm not a programmer!

I work for a software company. We have a SDK that customers can use to
customize the app. The requirement to use the SDK is:

XYZ App has been designed in such a way that all the business objects
used
in the application are automatically exposed through a thin COM wrapper
created
automatically during the application build process. This means that
using the
XYZ App SDK is very efficient, and all the same underlying objects and
properties that the application's programmers use to build the XYZ App
user
interface are also available to third-party programmers via the SDK.

Does it sound like Python would allow me use the apps SDK?

Thanks



From felipe.lessa at gmail.com  Wed Jan  3 14:48:24 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Wed, 3 Jan 2007 17:48:24 -0200
Subject: A python library to convert RTF into PDF ?
In-Reply-To: <1167850322.373355.327020@s34g2000cwa.googlegroups.com>
References: <1167846487.943390.192130@a3g2000cwd.googlegroups.com>
	<5stnp25m2uffc4n5k7g9e68hk2l85u4fmm@4ax.com>
	<1167850322.373355.327020@s34g2000cwa.googlegroups.com>
Message-ID: <c2701f5c0701031148r6e8faf74p1b33d527aff8890f@mail.gmail.com>

On 3 Jan 2007 10:52:02 -0800, leonel.gayard at gmail.com
<leonel.gayard at gmail.com> wrote:
> I have tried to
> convert them to tex using OpenOffice, but the result is ugly as hell.

Why not use OO.org to convert DOC to PDF? It does so natively, IIRC.

-- 
Felipe.


From jstroud at mbi.ucla.edu  Sat Jan 27 01:04:06 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 26 Jan 2007 22:04:06 -0800
Subject: strip question
In-Reply-To: <pan.2007.01.27.06.00.35.604063@REMOVE.THIS.cybersource.com.au>
References: <1169876027.003477.161350@a75g2000cwd.googlegroups.com>
	<pan.2007.01.27.06.00.35.604063@REMOVE.THIS.cybersource.com.au>
Message-ID: <epeq0m$dag$1@daisy.noc.ucla.edu>

Steven D'Aprano wrote:
> On Fri, 26 Jan 2007 21:33:47 -0800, eight02645999 wrote:
> 
> 
>>hi
>>can someone explain strip() for these :
>>[code]
>>
>>>>>x='www.example.com'
>>>>>x.strip('cmowz.')
>>
>>'example'
>>[/code]
>>
>>when i did this:
>>[code]
>>
>>>>>x = 'abcd,words.words'
>>>>>x.strip(',.')
>>
>>'abcd,words.words'
>>[/code]
>>
>>it does not strip off "," and "." .Why is this so?
>>thanks
> 
> 
> 
> Fascinating...
> 
> It gets weirder:
> 
> 
>>>>x.strip('s')
> 
> 'abcd,words.word'
> 
> Why strip only the final s, not the earlier one?
> 
> 
>>>>x.strip('w')
> 
> 'abcd,words.words'
> 
>>>>x.strip('o')
> 
> 'abcd,words.words'
> 
>>>>x.strip('r')
> 
> 'abcd,words.words'
> 
> Strips nothing.
> 
> 
>>>>x.strip('ba')
> 
> 'cd,words.words'
> 
> Strips correctly.
> 
> 
>>>>x.strip('bwa')
> 
> 'cd,words.words'
> 
> Strips the a and b but not the w.
> 
> 
>>>>x.strip('bwas')
> 
> 'cd,words.word'
> 
> ...and only one of the S's.
> 
> 
>>>>y = "bwas"
>>>>y.strip('bwas')
> 
> ''
> 
>>>>y = "bwasxyz"
>>>>y.strip('bwas')
> 
> 'xyz'
> 
> And yet these work.
> 
> 
> You know, I'm starting to think there may be a bug in the strip method...
> either that or the documentation should say:
> 
> strip(...)
>     S.strip([chars]) -> string or unicode
> 
>     Return a copy of the string S with leading and trailing
>     whitespace removed.
>     If chars is given and not None, remove none, some or all characters in
>     chars instead. If chars is unicode, S will be converted to unicode
>     before stripping
> 
> 
> *wink*
> 
> 

At the risk of appearing that I didn't notice your *wink*, the operative 
words in the docs would be "leading" and "trailing". But somehow I think 
you knew that.

James


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan  8 10:21:59 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 08 Jan 2007 16:21:59 +0100
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk> <entj5d$o4$1@south.jnrs.ja.net>
	<entkru$2vs$1@gemini.csx.cam.ac.uk>
Message-ID: <50f5snF1fb5uqU2@mid.individual.net>

Nick Maclaren wrote:

> Ah!  That explains it.  I would call that reason intermediate
> between rational and an artifact of the way the code has evolved!

Which code has evolved? Those precision problems are inherent
problems of the way floats are stored in memory.

Regards,


Bj?rn

-- 
BOFH excuse #292:

We ran out of dial tone and we're and waiting for the phone company
to deliver another bottle.



From g.tagliaretti at gmail.com  Wed Jan 17 17:21:39 2007
From: g.tagliaretti at gmail.com (Gian Mario Tagliaretti)
Date: Wed, 17 Jan 2007 23:21:39 +0100
Subject: Would a Dutch speaker please check this wiki page please?
References: <mailman.2852.1169070591.32031.python-list@python.org>
Message-ID: <45aea118$0$32708$4fafbaef@reader1.news.tin.it>

skip at pobox.com wrote:

> Got a note about a new page on the Python Wiki:
> 
>>>>>> "Wade" == Wade McDaniel <wmcdaniel at wolfgangsvault.com> writes:
> 
>     http://wiki.python.org/moin/Selcuk_Altun
> 
> I suspect it's junk since it doesn't seem to mention Python and the
> website

it says:

Welcome on my site www.keriwar.nl, if you have any questions first read the
F.A.Q.

In one sentence there are two mistakes, so I think the guy that wrote it is
not dutch and yes .. it's junk.

cheers
-- 
Gian Mario Tagliaretti


From bborcic at gmail.com  Wed Jan 24 09:32:56 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Wed, 24 Jan 2007 15:32:56 +0100
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <4866bea60701230724y3a51bc31p9970075f99b70d05@mail.gmail.com>
References: <45b6231b$1_2@news.bluewin.ch>
	<4866bea60701230724y3a51bc31p9970075f99b70d05@mail.gmail.com>
Message-ID: <ep7qoe$jdg$1@sea.gmane.org>

Chris Mellon wrote:
> 
> Using either win32 or wxPython you will be able to produce bitmaps
> directly, without needing to create a visible window.
> 
> 
> Some quick & dirty wxPython code
> 
> def getTextBitmap(text, font, fgcolor, bgcolor):
>     dc = wx.MemoryDC()
>     dc.SetFont(font)
>     width, height= dc.GetTextExtent(text)
>     bmp = wx.EmptyBitmap(width, height)
>     dc.SelectObject(bmp)
>     dc.SetBackground(wx.Brush(bgcolor))
>     dc.Clear()
>     dc.SetTextBackground(bgcolor)
>     dc.SetTextForeground(fgcolor)
>     dc.DrawText(text, 0, 0)
>     dc.SelectObject(wx.NullBitmap)
>     return bmp
> 
> 
> Raw win32 code will look similar but will be much more verbose.

Thx again for this base.

Quickly testing this, it appears that the result is rendered half a pixel off in 
the x-direction. Does this make sense ? Is it possible to position text with 
subpixel accuracy ?

Regards, Boris Borcic



From klaus at seistrup.dk  Sat Jan  6 15:58:45 2007
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Sat, 6 Jan 2007 20:58:45 +0000 (UTC)
Subject: nntplib downloads content with extra linebreaks
References: <1168110213.436860@sj-nntpcache-1.cisco.com>
	<enosln$hn6$1@minji.szn.dk>
	<1168112276.194982@sj-nntpcache-1.cisco.com>
	<enouja$k9m$1@minji.szn.dk>
	<1168115885.739704@sj-nntpcache-1.cisco.com>
Message-ID: <enp2i5$uip$1@minji.szn.dk>

Rweth wrote:

> so afile contains a filename.
> One single aline looks like so:
>    '</rme:SoftwareIdentity>'

Beats me where those empty lines come from, it doesn't seem to 
happen in nntplib.

Does the same thing happen if you pass .body() a filepointer?

Cheers,

-- 
Klaus Alexander Seistrup
http://klaus.seistrup.dk/



From larry.bates at websafe.com  Tue Jan 16 18:48:18 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 16 Jan 2007 17:48:18 -0600
Subject: Making a simple script standalone
In-Reply-To: <5d1084-5j7.ln1@whisper.very.softly>
References: <5d1084-5j7.ln1@whisper.very.softly>
Message-ID: <45AD6442.6050209@websafe.com>

Rikishi 42 wrote:
> Hi,
> I'm new to this group. I've tried finding my answer in existing messages,
> but no such luck.
> 
> What I want to do is to compile/bundle/prepare/whatever_term a simple
> Python script for deployment on a Windows machine. Installing Python
> itself on that machine, is not an option. Ideally I would like to obtain
> a single executable file, but a script+runtime is acceptable.
> 
> There is nothing graphical, nothing fancy about the script.
> The only imports are: os, stat, string and time.
> 
> 
> Any suggestions on an - easy and clear - path to follow ?
> 
> 

I use py2exe and inno installer.  Works great.

-Larry


From vgvr620034 at gmail.com  Tue Jan 30 04:37:20 2007
From: vgvr620034 at gmail.com (raghu)
Date: 30 Jan 2007 01:37:20 -0800
Subject: Explanation about pickle module
Message-ID: <1170149840.610362.319690@h3g2000cwc.googlegroups.com>

can any one explain about pickle i read in the book but they have not 
provided any example for that so please explain with a simple example



From medicalsounds at hotmail.com  Thu Jan 25 11:45:37 2007
From: medicalsounds at hotmail.com (Jona)
Date: 25 Jan 2007 08:45:37 -0800
Subject: Using Timing function problem.....
In-Reply-To: <mailman.3136.1169703356.32031.python-list@python.org>
References: <1169699160.119721.9750@v45g2000cwv.googlegroups.com>
	<mailman.3136.1169703356.32031.python-list@python.org>
Message-ID: <1169743535.955451.167900@q2g2000cwa.googlegroups.com>

Thanks so much! that did it!
you can tell I'm new with python.. lol...
thanks again..
Jonathan



From limodou at gmail.com  Fri Jan 26 03:14:17 2007
From: limodou at gmail.com (limodou)
Date: Fri, 26 Jan 2007 16:14:17 +0800
Subject: Announcement -- ZestyParser
In-Reply-To: <1168580486.921117.317630@v45g2000cwv.googlegroups.com>
References: <1168407920.281020.147680@k58g2000hse.googlegroups.com>
	<1168580486.921117.317630@v45g2000cwv.googlegroups.com>
Message-ID: <505f13c0701260014g516dbbd5vccba30de1ac86791@mail.gmail.com>

On 11 Jan 2007 21:41:26 -0800, Adam Atlas <adam at atlas.st> wrote:
> Thanks for the responses; you're right, and I have now posted the
> examples online. I just released version 0.6.0, by the way, which has
> several worthwhile improvements and much better documentation. It also
> includes an example for parsing RDF Notation3, to demonstrate a parsing
> task a bit more complex than the other examples.
>
> That's all posted at <http://adamatlas.org/2006/12/ZestyParser/> now.
>
I'm very interesting in this project, and I see there are many
examples, but there are no input data files. So I don't know how to
test them. Can you send me some testing data files or just add them
into the tarball file, so others can easy test the examples.

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From kleiner at hora-obscura.de  Thu Jan 18 06:01:16 2007
From: kleiner at hora-obscura.de (Stefan Palme)
Date: Thu, 18 Jan 2007 12:01:16 +0100
Subject: DOTALL not working as expected
References: <pan.2007.01.18.10.10.08.356617@hora-obscura.de>
	<pan.2007.01.18.10.19.20.440079@hora-obscura.de>
	<eoninb$77p$2@cernne03.cern.ch>
Message-ID: <pan.2007.01.18.11.01.13.221981@hora-obscura.de>


arghh.
Thanks for removing my blindness :)
-stefan-

On Thu, 18 Jan 2007 10:38:35 +0000, Roberto Bonvallet wrote:
> Stefan Palme wrote:
>>> using the "re" module of Python (2.3 and 2.4), I tried the following:
>>> 
>>>   import re
>>>   print re.sub('X.*?Y', 'Z', 'Xab\ncdY', re.DOTALL)
>>> 
>> Just noticed, that it works when *compiling* the pattern:
>> 
>>  import re
>>  p = re.compile('X.*?Y', re.DOTALL)
>>  print re.sub(p, 'Z', 'Xab\ncdY')
>> 
>> Still the question - my fault or a bug?
> 
> Your fault.  According to the documentation [1], the re.sub function takes
> a count as a fourth argument, not the compilation flags.
> 
> [1] http://docs.python.org/lib/node46.html
> 
> Cheers,



From http  Tue Jan 23 11:32:11 2007
From: http (Paul Rubin)
Date: 23 Jan 2007 08:32:11 -0800
Subject: free variables /cell objects question
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com>
	<Xns98C17C03B6297duncanbooth@127.0.0.1>
	<1169563580.634000.122540@v45g2000cwv.googlegroups.com>
Message-ID: <7xbqkpbt6c.fsf@ruckus.brouhaha.com>

"gangesmaster" <tomerfiliba at gmail.com> writes:
> so this is why [lambda: i for i in range(10)] will always return 9.
> imho that's a bug, not a feature.

Use [(lambda j: lambda: j)(i) for i in range(10)]
or the Python idiom [(lambda i=i: i) for i in range(10)]


From horpner at yahoo.com  Tue Jan 23 11:21:39 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 23 Jan 2007 16:21:39 GMT
Subject: Are there sprintf in Python???
References: <1169496238.925052.311660@l53g2000cwa.googlegroups.com>
Message-ID: <slrnercgq6.r4.horpner@FIAD06.norwich.edu>

On 2007-01-22, questions? <universal_used at hotmail.com> wrote:
> Are there any sprintf in Python?
> I know you can print to files(or redefine sys.stout) and later open the
> file content.
>
> Are there similar function to sprintf in C?

No, but you can compose a similar function very easily.

def sprintf(format, *objects):
  return format % tuple(objects)

Since strings are immutable it's not convenient to provide a
pass-out parameter as in C. If you want to check for errors
you'll have to catch the exceptions, rather than inspect the
return value as you can in C.

-- 
Neil Cerutti
Symphonies of the Romantic era were a lot longer in length. --Music Lit Essay

-- 
Posted via a free Usenet account from http://www.teranews.com



From skip at pobox.com  Tue Jan  2 13:07:42 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 2 Jan 2007 12:07:42 -0600
Subject: python2.5 frameobject - how to upgrade?
In-Reply-To: <459A936C.4090609@skynet.be>
References: <459a6894$0$9322$ba620e4c@news.skynet.be>
	<mailman.2204.1167749700.32031.python-list@python.org>
	<459A936C.4090609@skynet.be>
Message-ID: <17818.40814.10769.56066@montanaro.dyndns.org>


    Helmut> A personal question: Have you converted from Perl to Python, as
    Helmut> well?

Never really needed to.  Anybody hiring me for my Perl expertise would be in
big trouble. ;-)

Skip


From weekender_ny at yahoo.com  Sun Jan 21 23:03:54 2007
From: weekender_ny at yahoo.com (John)
Date: 21 Jan 2007 20:03:54 -0800
Subject: html + javascript automations = [mechanize + ?? ] or something
	else?
In-Reply-To: <1168965900.409623.53970@a75g2000cwd.googlegroups.com>
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
	<1168965900.409623.53970@a75g2000cwd.googlegroups.com>
Message-ID: <1169438634.022238.275740@51g2000cwl.googlegroups.com>


I tried to install pamie (but I have mostly used python on cygwin on
windows).
In the section " What will you need to run PAMIE", it says I will need
"Mark Hammonds Win32 All"
which I can not find. Can anyone tell me how do I install PAMIE? Do I
need python for
windows that is different from cygwin's python?

Thanks,
--j

ina wrote:
> John wrote:
> > I have to write a spyder for a webpage that uses html + javascript. I
> > had it written using mechanize
> > but the authors of the webpage now use a lot of javascript. Mechanize
> > can no longer do the job.
> > Does anyone know how I could automate my spyder to understand
> > javascript? Is there a way
> > to control a browser like firefox from python itself? How about IE?
> > That way, we do not have
> > to go thru something like mechanize?
> >
> > Thanks in advance for your help/comments,
> > --j
>
> You want pamie, iec or ishybrowser.  Pamie is probably the best choice
> since it gets patches and updates on a regular basis.
> 
> http://pamie.sourceforge.net/



From nanjundi at gmail.com  Mon Jan 22 19:53:27 2007
From: nanjundi at gmail.com (Nanjundi)
Date: 22 Jan 2007 16:53:27 -0800
Subject: Are there sprintf in Python???
References: <1169496238.925052.311660@l53g2000cwa.googlegroups.com>
Message-ID: <1169513607.120734.33150@s48g2000cws.googlegroups.com>

> Are there any sprintf in Python?

Refer module StringIO - just like file input/output operations.
cStringIO is another module  (faster)

Quick intro:
from StringIO import StringIO
s = StringIO()
s.write('hello')
s.seek(0)
print s.read() 

-N



From ejatsomewhere.com  Thu Jan  4 15:49:22 2007
From: ejatsomewhere.com (Erik Johnson)
Date: Thu, 4 Jan 2007 13:49:22 -0700
Subject: subclassing a module: misleading(?) error message
Message-ID: <459d687a$1@nntp.zianet.com>

I ran into a problem I didn't understand at first. I got part of it figured
out. Let me first demonstrate the original problem:

> cat Super.py

class Super(object):
    def __init__(self):
        self._class = 'Super'
    def hello(self):
        print "%s says 'Hello'" % self._class
> cat Sub.py

import Super

class Sub(Super):
    def __init__(self):
        self._class = 'Sub'
>
> python
Python 2.3.4 (#1, Feb  7 2005, 15:50:45)
[GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from Super import Super
>>> from Sub import Sub
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "Sub.py", line 4, in ?
    class Sub(Super):
TypeError: function takes at most 2 arguments (3 given)
>>>

My question is NOT "What's wrong here?"
(The answer to that is that the import in Sub.py should be:  from Super
import Super
i.e., I tried to use the module itself where I meant to subclass the class
defined in that module).

My questions are:

Why does python complain about a function here? (it's a class definition
statement, right?)
Is there really a function being called here?
If so:
    What function was called?
    What two arguments is it expecting?
    What three were given?

Thanks,
-ej




From ggrp1.20.martineau at dfgh.net  Sun Jan  7 16:16:10 2007
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 7 Jan 2007 13:16:10 -0800
Subject: Python cheatsheets
References: <mailman.2400.1168203791.32031.python-list@python.org>
Message-ID: <1168204570.358284.72530@11g2000cwr.googlegroups.com>

gonzlobo wrote:

> Curious if anyone has a python cheatsheet* published? I'm looking for
> something  that summarizes all commands/functions/attributes. Having
> these printed on a 8" x 11" double-sided laminated paper is pretty
> cool.
>
> * cheatsheet probably isn't the right word, but you get the idea. :)

Richard Gruet publishes an excellent Quick Reference in multiple
formats, available from <http://rgruet.free.fr>.

-Martin



From steve at REMOVE.THIS.cybersource.com.au  Mon Jan  1 00:50:36 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 01 Jan 2007 16:50:36 +1100
Subject: I want to see all the variables
References: <s57lh.335$c46.311@newsfe05.lga> <45952426.1080800@websafe.com>
	<pan.2006.12.29.16.35.00.363156@REMOVE.THIS.cybersource.com.au>
	<8yelh.90$Q4.82@newsfe02.lga>
	<pan.2006.12.29.22.46.14.436601@REMOVE.THIS.cybersource.com.au>
	<FPylh.22$eq5.11@newsfe02.lga>
	<459722fc$0$30313$9b4e6d93@newsspool1.arcor-online.net>
	<pan.2006.12.31.02.56.19.358717@REMOVE.THIS.cybersource.com.au>
	<2v0hp2tbk8uq2pbqi6874b4tidbck2tpga@4ax.com>
	<pan.2007.01.01.05.14.12.260857@REMOVE.THIS.cybersource.com.au>
	<7xbqljnww8.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.01.01.05.50.35.837293@REMOVE.THIS.cybersource.com.au>

On Sun, 31 Dec 2006 21:23:03 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
>> > At the same time, you should ponder very
>> > carefully the reasons why the original author deemed it important to
>> > make those attributes private in the first place.
>> 
>> In my experience, it is mostly because they come from
>> bondage-and-domination languages where it is expected that
>> everything is private except for a small, carefully chosen public
>> API, rather than from languages like Python that encourages openness
>> and a philosophy of "we're all adults here".
> 
> Funny thing, some of those B&D languages were designed by people who
> had plenty of experience with Lisp and were tired of being bitten by
> its Python-like looseness.

I never said they were wrong to do so. But those languages aren't
Python. Python is designed for those who are tied of the constant
restraint of B&D languages.


>> I wonder how many double-underscore "private" attributes are used in
>> the Python standard library? That should give you an idea of "best
>> practice" use of private attributes in Python.
> 
> If socket.py is an example of best practice use of private attributes, I
> shudder to imagine what kind of cruft must lurk in legacy applications.

socket.py doesn't have any double-underscore private attributes (at least
not in Python 2.4). So what's your point?



-- 
Steven.



From wyldwolf at gmail.com  Tue Jan 23 11:06:56 2007
From: wyldwolf at gmail.com (Kevin Kelley)
Date: Tue, 23 Jan 2007 10:06:56 -0600
Subject: 2007 DST Changes
Message-ID: <77895c1d0701230806m4d49503dre4d29845ebdb827b@mail.gmail.com>

Is python affected by the 2007 DST changes in the US? Other than making sure
the OS is patched correctly (Win 2K and Solaris 8) is there anything else
that needs to be done from a Python point of view?

Thanks,
Kevin Kelley
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070123/a04361df/attachment.html>

From nagle at animats.com  Mon Jan 15 21:50:56 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 16 Jan 2007 02:50:56 GMT
Subject: Does class patching actually work
Message-ID: <k4Xqh.49756$wc5.21255@newssvr25.news.prodigy.net>

In M2Crypto/m2urllib there is this:

	import string, sys, urllib
	from urllib import *

	def open_https(self, url, data=None, ssl_context=None):
	 ...

	# Minor brain surgery.
	URLopener.open_https = open_https

The intent of this is to replace method open_https of class URLopener
with a local, patched version.

Does that actually work?  When I've tried to do that in other code, it
seems to have no effect.  In fact, I can write

	URLopener.open_https = None

and nothing changes.

				John Nagle


From not at set.se  Tue Jan 23 17:01:36 2007
From: not at set.se (Daniel Jonsson)
Date: Tue, 23 Jan 2007 23:01:36 +0100
Subject: My python programs need a GUI, wxPython or PyQt4?
Message-ID: <ep60jp$63v$1@aioe.org>

So, I've reached the point where my building pipeline tools actually 
needs to be used by other people in my company. By this reason I 
actually need to think about the usability, and I've come to the 
conclusion that I need a GUI. So, which of the two packages should I 
learn, and which one is easier to pick up? 
Thanks in advance!

Daniel


From kylotan at gmail.com  Fri Jan 12 05:07:25 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 12 Jan 2007 02:07:25 -0800
Subject: Is there a good example on instantiating, calling, using,
	an API from Python on Windows?
In-Reply-To: <1168563132.224441.212130@51g2000cwl.googlegroups.com>
References: <1168541166.457806.133320@p59g2000hsd.googlegroups.com>
	<45A6CA45.3000300@websafe.com>
	<1168563132.224441.212130@51g2000cwl.googlegroups.com>
Message-ID: <1168596445.398267.81330@38g2000cwa.googlegroups.com>

kj7ny wrote:

> To be more exact, I am trying to use Python to talk to a Livelink
> system (http://www.opentext.com/) through their LAPI interface (.dll's,
> I think).  I'll see if I can generate a more intelligent answer to your
> question, but for now, I'm far enough in the dark that this is as good
> as I can get.

API is a vague term referring to the interface to an application, which
could take one of many forms. The form it takes dictates the method you
need to use here.

If indeed it is via DLLs, then the ctypes module may help. Otherwise,
you need to find out precisely what form the API takes.

-- 
Ben Sizer



From timr at probo.com  Fri Jan  5 02:17:55 2007
From: timr at probo.com (Tim Roberts)
Date: Fri, 05 Jan 2007 07:17:55 GMT
Subject: cache line length of a machine
References: <1167953016.952907.279260@i15g2000cwa.googlegroups.com>
Message-ID: <7burp2dgedmpf7utp4c5hi58dncc44kdqj@4ax.com>

"John" <weekender_ny at yahoo.com> wrote:
>
>How do I find out the cache line length of a machine in python?

How would that piece of information be valuable in Python?  There isn't
anything you can do to take advantage of it in Python.

You can look up the L2 and L3 cache size and speed using WMI (assuming you
are using Windows).  For more detailed, you will have to call into a C
routine, and maybe even resort to looking up the cpuid info.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From bj_666 at gmx.net  Wed Jan 24 16:23:25 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 24 Jan 2007 22:23:25 +0100
Subject: raise UnicodeError, "label too long"
References: <1169672223.231030.262610@l53g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.24.21.23.25.331322@gmx.net>

In <1169672223.231030.262610 at l53g2000cwa.googlegroups.com>, Flavio wrote:

> Hi I am havin a problem with urllib2.urlopen.
> 
> I get this error when I try to pass a unicode to it.
> 
> raise UnicodeError, "label too long"
> 
> is this problem avoidable? no browser or programs such as wget seem to
> have a problem with these strings.

What exactly are you doing?  How does a (unicode?) string look like that
triggers this exception?

Ciao,
	Marc 'BlackJack' Rintsch



From NikitaTheSpider at gmail.com  Sat Jan 20 15:41:18 2007
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Sat, 20 Jan 2007 15:41:18 -0500
Subject: spidering script
References: <8N6dnSE2eO6QKDLYnZ2dnUVZ_uejnZ2d@fdn.com>
Message-ID: <NikitaTheSpider-427B4F.15411820012007@news-server.nc.rr.com>

In article <8N6dnSE2eO6QKDLYnZ2dnUVZ_uejnZ2d at fdn.com>,
 "David Waizer" <dwaizer at noreply.com> wrote:

> Hello..
> 
> I'm  looking for a script (perl, python, sh...)or program (such as wget) 
> that will help me get a list of ALL the links on a website.
> 
> For example ./magicscript.pl www.yahoo.com and outputs it to a file, it 
> would be kind of like a spidering software..

David,
In addition to others' suggestions about Beautiful Soup, you might also 
want to look at the HTMLData module:

http://oregonstate.edu/~barnesc/htmldata/

-- 
Philip
http://NikitaTheSpider.com/
Whole-site HTML validation, link checking and more


From mail at microcorp.co.za  Sun Jan 14 00:18:11 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 14 Jan 2007 07:18:11 +0200
Subject: Maths error
References: <envur1$rq1$1@gemini.csx.cam.ac.uk><mailman.2480.1168350033.32031.python-list@python.org><Xns98B384E126F4Ctim111one@216.196.97.136><eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136><eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org><eo7kdf$a80$1@gemini.csx.cam.ac.uk><mailman.2685.1168670120.32031.python-list@python.org>
	<DN%ph.10462$w91.2298@newsread1.news.pas.earthlink.net>
Message-ID: <002901c7379b$634567e0$03000080@hendrik>

 "Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote:


> {My 8th grade teacher was a bit worried at seeing me with a slipstick
> <G>; and my HighSchool Trig/Geometry teacher only required 3 significant
> digits for answers -- even though half the class had calculators by
> then}

LOL - I haven't seen the word "slipstick" for yonks...

I recall an SF character known as "Slipstick Libby",
who was supposed to be a Genius - but I forget
the setting and the author.

It is something that has become quietly extinct, and
we did not even notice.

We should start a movement for reviving them -
on grounds of their "greenness" - they use no
batteries...

Fat chance.

- Hendrik




From hg at nospam.org  Wed Jan 24 01:47:26 2007
From: hg at nospam.org (hg)
Date: Wed, 24 Jan 2007 07:47:26 +0100
Subject: My python programs need a GUI, wxPython or PyQt4?
References: <ep60jp$63v$1@aioe.org> <45b72b0d$0$5107$ba4acef3@news.orange.fr>
Message-ID: <zrJth.301$8Q.7@newsfe14.lga>

Laurent Rahuel wrote:

> Hi,
> 
> I known this can be impossible but what about an "HTML" GUI ?
> 
> Daniel Jonsson wrote:
> 
>> So, I've reached the point where my building pipeline tools actually
>> needs to be used by other people in my company. By this reason I
>> actually need to think about the usability, and I've come to the
>> conclusion that I need a GUI. So, which of the two packages should I
>> learn, and which one is easier to pick up?
>> Thanks in advance!
>> 
>> Daniel

I think it has been proposed.

I have customers that require that but usually find two major issues with
the concept:

1) Unless very knowledgeable in Ajax, it is quite difficult to reach the
same level of functionnality from a browser
2) accessing local devices generally requires browser plugins (XPCOM for
mozilla and ActiveX for IE) .... which are a pain to code and are
considered a security breach.

hg



From codecraig at gmail.com  Wed Jan 24 09:12:14 2007
From: codecraig at gmail.com (abcd)
Date: 24 Jan 2007 06:12:14 -0800
Subject: Thoughts on using isinstance
In-Reply-To: <mailman.3077.1169645738.32031.python-list@python.org>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<mailman.3077.1169645738.32031.python-list@python.org>
Message-ID: <1169647934.219682.144390@j27g2000cwj.googlegroups.com>

> The "Python way" is to validate by performing the operations you need to
> perform and catching any exceptions that result. In the case of your
> example, you seem to be saying that you'd rather raise your own
> exception (which, by the way, should really be a subclass of Exception,
> but we will overlook that) that relying on the interpreter to raise a
> ValueError or a TypeError. Is there really any advantage to this? You
> increase your code size and add *something* to execution time with
> little real purpose.
>
> People coming to Python after C++ or some similar language that allows
> or requires parameter type declarations often don't feel comfortable
> taking this direction to start with, but  it works well for most of us.
>
> regards
>   Steve


So instead of validating input I should just try and use the input as
if it was correct, and let python throw the errors?



From vpolukcht at gmail.com  Tue Jan 16 09:22:42 2007
From: vpolukcht at gmail.com (Victor Polukcht)
Date: 16 Jan 2007 06:22:42 -0800
Subject: Regular expressions question
In-Reply-To: <Xns98BA7A00DDBC0duncanbooth@127.0.0.1>
References: <1168947810.175793.228620@51g2000cwl.googlegroups.com>
	<Xns98BA7A00DDBC0duncanbooth@127.0.0.1>
Message-ID: <1168957361.204348.30080@s34g2000cwa.googlegroups.com>

Actually, i'm trying to get the values of first field (Global) , fourth
(200, 4), and fifth (100%) and sixth (100%).

Everything except fourth is simple.

On Jan 16, 2:59 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> "Victor Polukcht" <vpoluk... at gmail.com> wrote:
> > I have 2 strings:
>
> > "Global               etsi3   *200 ok            30   100% 100%
> > Outgoing"
> > and
> > "Global               etsi3   *   4 ok             30   100% 100%
> > Outgoing"
>
> > The difference is "*200" instead of "*  4". Is there ability to write a
> > regular expression that will match both of that strings?Yes, ".*" would match both of the strings, but not in a useful way. You'll
> have to consider which strings you *don't* want to match as well as which
> ones you do and whether you want to extract any information from the
> strings or find the ones which match.
>
> But first take a step back and look at the problem as a whole. You didn't
> say what you are trying to do, and often people will jump at regular
> expressions as the solution when there may be better ways of doing what
> they want without writing a regular expression.
> 
> What do you really want to do?



From justin.mailinglists at gmail.com  Thu Jan 11 04:59:20 2007
From: justin.mailinglists at gmail.com (Justin Ezequiel)
Date: 11 Jan 2007 01:59:20 -0800
Subject: os.popen() not executing command on windows xp
In-Reply-To: <1168508553.151827.261420@k58g2000hse.googlegroups.com>
References: <1168508553.151827.261420@k58g2000hse.googlegroups.com>
Message-ID: <1168509560.119819.78470@o58g2000hsb.googlegroups.com>

> import os
> a = os.popen('"c:\Program Files\Grisoft\AVG Free\avgscan.exe"
> "c:\program files\temp1\test1.txt"')
> print a.read()
>

use raw strings

e.g., instead of '"c:...\avgscan...'
use r'"c:...\avgscan...'

http://www.ferg.org/projects/python_gotchas.html#contents_item_2



From Roland.Puntaier at br-automation.com  Wed Jan 10 11:10:05 2007
From: Roland.Puntaier at br-automation.com (Roland Puntaier)
Date: Wed, 10 Jan 2007 17:10:05 +0100
Subject: SubProcess _make_inheritable
Message-ID: <OF06074433.08D4CD75-ONC125725F.00585860-C125725F.0058D2DC@br-automation.com>

SubProcess.py needs to be patched - at least in 2.4 -  to work from 
windows GUIs:

        def _make_inheritable(self, handle):
            """Return a duplicate of handle, which is inheritable"""
            if handle==None: handle=-1
            return DuplicateHandle(GetCurrentProcess(), handle,
                                   GetCurrentProcess(), 0, 1,
                                   DUPLICATE_SAME_ACCESS)


From cliff at develix.com  Wed Jan 24 18:38:29 2007
From: cliff at develix.com (Cliff Wells)
Date: Wed, 24 Jan 2007 15:38:29 -0800
Subject: ANN: Dejavu 1.5.0RC1
In-Reply-To: <435DF58A933BA74397B42CDEB8145A8608C50C4F@ex9.hostedexchange.local>
References: <435DF58A933BA74397B42CDEB8145A8608C50C4F@ex9.hostedexchange.local>
Message-ID: <1169681909.3499.29.camel@portable-evil>

On Wed, 2007-01-24 at 14:57 -0800, Robert Brewer wrote:

> 1. Expressions: pure Python lambda querying. This is perhaps the most
>    appealing feature of Dejavu.


Actually I just went and looked and personally I find the documentation
the most appealing feature.

Regards,
Cliff



From jan.dries at dcube-resource.be  Wed Jan  3 16:02:13 2007
From: jan.dries at dcube-resource.be (Jan Dries)
Date: Wed, 03 Jan 2007 22:02:13 +0100
Subject: Unsubscribing from the list
In-Reply-To: <880dece00701031247l3d2354a3le318340653969de8@mail.gmail.com>
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>	<ene064$bm5$1@sea.gmane.org>	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>	<enghj3$qhf$1@sea.gmane.org>	<880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com>	<engs22$6u3$1@sea.gmane.org>	<880dece00701031033o151cbe76h92a5a5adde51db90@mail.gmail.com>	<enh4g4$n0h$1@sea.gmane.org>
	<880dece00701031247l3d2354a3le318340653969de8@mail.gmail.com>
Message-ID: <459C19D5.2040706@dcube-resource.be>

Dotan Cohen wrote:
> On 03/01/07, Robert Kern <robert.kern at gmail.com> wrote:
>> He misunderstood you (as I nearly did, too). The way you phrased "decided that
>> there was no futher interest on the page for me" is somewhat ambiguous: it can
>> seem like it refers to the second time, not the first.
>>
> 
> Ah. Sorry. I'm getting better at confusing people :)
> 
> if ($you=="got_offended") {
>     $dotan="sorry";
> }

Except that on this list, you might offend people just by using vulgar 
language like that. Better rephrase it to:

if you == "got_offended":
     dotan = "sorry"


Regards,
Jan




From tjreedy at udel.edu  Wed Jan 31 14:47:30 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 31 Jan 2007 14:47:30 -0500
Subject: how to "free" an object/var ?
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl><epolgl$8i4$1@zinnia.noc.ucla.edu><pan.2007.01.31.06.52.12.82782@REMOVEME.cybersource.com.au>
	<AAXvh.1465$zH1.1114@newssvr29.news.prodigy.net>
Message-ID: <epqroh$2u2$1@sea.gmane.org>


"John Nagle" <nagle at animats.com> wrote in message 
news:AAXvh.1465$zH1.1114 at newssvr29.news.prodigy.net...
|    If your data structure has no backlinks, it will go away
| as soon as the last reference to it disappears.
|    In Python, garbage collection is mostly a backup to
| the reference counting system.

These both are true of the CPython implementation (current and known 
future, at least) but not of other implementations and not of the language 
itself.

The same comment applies to some other posts in this thread.  GC, if any, 
is implementation defined.

tjr





From ptmcg at austin.rr._bogus_.com  Mon Jan  8 02:20:38 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 8 Jan 2007 01:20:38 -0600
Subject: regex question
References: <1168232001.377605.236270@11g2000cwr.googlegroups.com>
Message-ID: <45a1f0c6$0$18929$4c368faf@roadrunner.com>


"proctor" <12cc104 at gmail.com> wrote in message 
news:<1168232001.377605.236270 at 11g2000cwr.googlegroups.com>...
> hello,
>
> i hope this is the correct place...
>
> i have an issue with some regex code i wonder if you have any insight:
>
> ================

There's nothing actually *wrong* wth your regex.  The problem is your 
misunderstanding of raw string notation.  In building up your regex, do not 
start the string with "r'" and end it with a "'".

def makeRE(w):
    print w + " length = " + str(len(w))
    # reString = "r'" + w[:1]
    reString = w[:1]
    w = w[1:]
    if len(w) > 0:
        for c in (w):
            reString += "|" + c
        # reString += "'"
    print "reString = " + reString
    return reString

Or even better:

def makeRE(w):
    print w + " length = " + str(len(w))
    reString = "|".join(list(w))
    return reString

Raw string notation is intended to be used when the string literal is in 
your Python code itself, for example, this is a typical use for raw strings:

ipAddrRe = r'\d{1,3}(\.\d{1,3}){3}'

If I didn't have raw string notation to use, I'd have to double up all the 
backslashes, as:

ipAddrRe = '\\d{1,3}(\\.\\d{1,3}){3}'

But no matter which way I create the string, it does not actually start with 
"r'" and end with "'", those are just notations for literals that are part 
of your Python source.

Does this give you a better idea of what is happening?

-- Paul




From smusnmrNOSPAM at yahoo.com  Mon Jan 15 06:00:33 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Mon, 15 Jan 2007 12:00:33 +0100
Subject: Problem with findinf wx modules  solved
References: <eo0eom$cirq$1@zam602.zam.kfa-juelich.de>
	<p3pbq2h0gaa9qkrl03iansir43vjjp00k7@4ax.com>
	<eo5hpp$2tmo$1@zam602.zam.kfa-juelich.de>
Message-ID: <eofmsh$eqlb$1@zam602.zam.kfa-juelich.de>

I included the "...\wxDemos" path in PYTHONPATH. Everthing fine now!

"siggi" <smusnmrNOSPAM at yahoo.com> schrieb im Newsbeitrag 
news:eo5hpp$2tmo$1 at zam602.zam.kfa-juelich.de...
> "Tim Roberts"  wrote:
>>>
>>>when I do >>>sys.path in IDLE (winXP), i get a horrendously long list of
>>>paths, paths I may have used during a lot of trials and errors. How can I
>>>clean up sys.path? I mean, trim it of unnecessary paths?
>>
>> What do mean by "used during a lot of trials and errors"?  sys.path is
>> recreated from scratch every time Python starts.  It doesn't accumulate
>> over time, other than from new packages that you install.
>> -- 
>> Tim Roberts, timr at probo.com
>> Providenza & Boekelheide, Inc.
>
>
> Sorry Tim, my statement was not correct, due to my inexperience with 
> Python.
> And sorry, too, for my somewhat lengthy reply:
> After having had inspected my current sys.path...
>
> ['C:\\Documents and Settings\\User\\My Documents\\My Python files',
> 'C:\\Documents and Settings\\User\\My Documents\\Python25\\Lib\\idlelib',
> 'C:\\Documents and Settings\\User\\My Documents\\Python25\\python25.zip',
> 'C:\\Documents and Settings\\User\\My Documents\\Python25\\DLLs',
> 'C:\\Documents and Settings\\User\\My Documents\\Python25\\lib',
> 'C:\\Documents and Settings\\User\\My Documents\\Python25\\lib\\plat-win',
> 'C:\\Documents and Settings\\User\\My Documents\\Python25\\lib\\lib-tk',
> 'C:\\Documents and Settings\\User\\My Documents\\Python25', 'C:\\Documents
> and Settings\\User\\My Documents\\Python25\\lib\\site-packages',
> 'C:\\Documents and Settings\\User\\My
> Documents\\Python25\\lib\\site-packages\\PIL', 'C:\\Documents and
> Settings\\User\\My Documents\\Python25\\lib\\site-packages\\win32',
> 'C:\\Documents and Settings\\User\\My
> Documents\\Python25\\lib\\site-packages\\win32\\lib', 'C:\\Documents and
> Settings\\User\\My Documents\\Python25\\lib\\site-packages\\Pythonwin',
> 'C:\\Documents and Settings\\User\\My
> Documents\\Python25\\lib\\site-packages\\wx-2.8-msw-ansi']
>
> or in plain DOS:
>
> C:\Documents and Settings\User\My Documents\My Python files
> C:\Documents and Settings\User\My Documents\Python25\Lib\idlelib
> C:\Documents and Settings\User\My Documents\Python25\python25.zip
> C:\Documents and Settings\User\My Documents\Python25\DLLs
> C:\Documents and Settings\User\My Documents\Python25\lib
> C:\Documents and Settings\User\My Documents\Python25\lib\plat-win
> C:\Documents and Settings\User\My Documents\Python25\lib\lib-tk
> C:\Documents and Settings\User\My Documents\Python25
> C:\Documents and Settings\User\My Documents\Python25\lib\site-packages
> C:\Documents and Settings\User\My Documents\Python25\lib\site-packages\PIL
> C:\Documents and Settings\User\My 
> Documents\Python25\lib\site-packages\win32
> C:\Documents and Settings\User\My
> Documents\Python25\lib\site-packages\win32\lib
> C:\Documents and Settings\User\My
> Documents\Python25\lib\site-packages\Pythonwin
> C:\Documents and Settings\User\My
> Documents\Python25\lib\site-packages\wx-2.8-msw-ansi
>
> ...it just looked horrible to me at first sight!
>
> If I interpret your explanation correctly, all these paths are necessary,
> and not relics of previous installations and deinstallations.
>
> What puzzles me, though, is, that e.g., when I run the wxPython 
> application
> "AnalogClock.py" with IDLE or in the command line , this works only in the
> directory "...\My Python files\wxDemos\" . This directory contains all 
> files
> and folders from the original "\wx-2.8-msw-ansi\demos\").
>
> When I copy AnalogClock.py to ...\My Python Files\  , nothing happens 
> after
> running it with IDLE or in the command line.
> Appending 'C:\Documents and Settings\User\My Documents\My Python
> files\wxDemos ' to the sys.path does not help either.
>
> Thinking that I am clever, I  changed my sys.path with sclicing and
> concatenation such that my sys.path starts with
>
> 'C:\Documents and Settings\User\My Documents\My Python files', 
> 'C:\Documents
> and Settings\User\My Documents\My Python files\wxDemos'. Now \wxDemos\ is
> being searched very early.
>
> ... no way! After running AnalogClock.py again, this error message 
> appears:
>
> ------------------------------------------
> Traceback (most recent call last):
>  File "C:\Documents and Settings\My Documents\My Python
> files\wxAnalogClock.py", line 14, in <module>
>    import wx
> ImportError: No module named wx.
> ------------------------------------------
>
> Very strange! Because all this wx stuff IS IN the directory 'C:\Documents
> and Settings\User\My Documents\My Python files\wxDemos'. And 
> AnalogClock.py
> does work when residing in that directory.
>
> Can you help me again?
>
> Thanks,
>
> siggi
>
> P.S. On another PC where the python program is in c:\programs\python25\, 
> same as above!
>
>
>
>
>
> 




From donn at u.washington.edu  Tue Jan  9 17:53:37 2007
From: donn at u.washington.edu (Donn Cave)
Date: Tue, 09 Jan 2007 14:53:37 -0800
Subject: Non-blocking pipes during subprocess handling
References: <22q5q25jn7dfti18rv1tshj7os5a0gm27r@4ax.com>
Message-ID: <donn-911345.14533709012007@gnus01.u.washington.edu>

In article <22q5q25jn7dfti18rv1tshj7os5a0gm27r at 4ax.com>,
 Tom Plunket <tomas at fancy.org> wrote:

> I'm using subprocess to launch, well, sub-processes, but now I'm
> stumbling due to blocking I/O.
> 
> Is there a way for me to know that there's data on a pipe, and possibly
> how much data is there so I can get it?  Currently I'm doing this:
> 
> 	process = subprocess.Popen(
> 		args,
> 		bufsize=1,
> 		universal_newlines=True,
> 		stdout=subprocess.PIPE,
> 		stderr=subprocess.PIPE)
> 
> 	def ProcessOutput(instream, outstream):
> 		text = instream.readline()
> 		if len(text) > 0:
> 			print >>outstream, text,
> 			return True
> 		else:
> 			return False


I think it would be fair to say that your problem is
not due to blocking I/O, so much as buffered I/O.  Since
you don't appear to need to read one line at a time, you
can detect and read data from the file descriptor without
any buffering.  Don't mix with buffered I/O, as this will
throw the select off.  From memory - better check, since
it has been a while since I wrote anything real like this
(or for that matter much of anything in Python) --


import select
def ProcessOutput(instream, outstream):
    fdr = [instream.fileno()]
    (r, w, e) = select.select(fdr, [], [], 0.0)
    for fd in r:
        text = os.read(fd, 4096)
        outstream.write(text)

   Donn Cave, donn at u.washington.edu


From durumdara at gmail.com  Wed Jan  3 07:30:22 2007
From: durumdara at gmail.com (durumdara)
Date: Wed, 03 Jan 2007 13:30:22 +0100
Subject: [Half-off] How to get textboxes (text blocks) from ps/pdf files?
Message-ID: <459BA1DE.7040205@gmail.com>

Hi!

I need to get textboxes/textblocks from pdf files. I can convert them 
into ps.
Is anyone knows about method, trick, routine to I can get the textboxes 
from ps or pdf?
(Pythonic, COM, or command line solutions needed.)

I need to redraw them into my application, and user can reorder them, 
and next I concat. every text to process it.

I need these infos:
x, y, w, h, text

Example:
page1
textbox1{x:100,y:100;w:600;h:27;text:"TextBox1 /xfc /xfa"}
textbox2{x:100,y:180;w:600;h:27;text:"TextBox2"}
page2
textbox1{x:100,y:100;w:600;h:27;text:"TextBox1"}
textbox2{x:100,y:180;w:600;h:27;text:"TextBox2"}
...

Any solution?

Thanks for it!
    dd

ps1:
    I tried every pdf2text and pdf2html application. All failed in the 
test.
    Only one provide good informations, the pdftohtml, because it is 
makes divs with abs. position and size and the texts.
    But this program is not handle the iso-8859-2 chars, so I lost them.

ps2:
    The program must run under Windows XP. So the solution is os specific.
   



From grahn+nntp at snipabacken.dyndns.org  Mon Jan 22 15:46:23 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 22 Jan 2007 20:46:23 GMT
Subject: Is any python like linux shell?
References: <1169398326.510530.180860@51g2000cwl.googlegroups.com>
	<ep1kg9$uot$1@zinnia.noc.ucla.edu>
Message-ID: <slrnera3ir.tcj.grahn+nntp@frailea.sa.invalid>

On Sun, 21 Jan 2007 22:10:17 -0800, James Stroud <jstroud at mbi.ucla.edu> wrote:
> Frank Potter wrote:
>> I learned some python in windows.
>> And now I've turned to linux.
>> I read a book and it teaches how to write shell script with bash,
>> but I don't feel like the grammar of bash.
...

> My strongest advice would be to let go of the idea of "shell scripting" 
> altogether and begin to write programs built from libraries to solve 
> your problems.

Shell scripting is "building from libraries". In this case, other
executables are the libraries.

> The mere act of beginning to write a shell script (in, 
> say, bash) will tie you to that "language",

In what way is shell scripting different from Python scripting here?

> even when you realize your 
> task was much more complex than you had originally imagined. It has 
> happened to me time and time again.

Opinions differ, of course.

Me, I don't hesitate to write Bourne shell scripts when that seems like the
straightforward idea. Then it's my responsibility to move to something else
-- usually Python -- if the problem grows out of its language. (And I have
to admit, I don't let it grow very complex before I make that choice,
because I don't known Bourne shell that well.)

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From bearophileHUGS at lycos.com  Wed Jan  3 17:46:20 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 3 Jan 2007 14:46:20 -0800
Subject: static object
In-Reply-To: <459c306c$0$314$426a74cc@news.free.fr>
References: <459c306c$0$314$426a74cc@news.free.fr>
Message-ID: <1167864379.679648.267340@42g2000cwt.googlegroups.com>

That looks like some kind of singleton. Why don't you use a module
instead of a class?

Another solution is to define your data as class attributes.

Bye,
bearophile



From manstey at csu.edu.au  Sun Jan 28 23:24:23 2007
From: manstey at csu.edu.au (manstey)
Date: 28 Jan 2007 20:24:23 -0800
Subject: sending a class as an argument
Message-ID: <1170044663.163303.131930@v45g2000cwv.googlegroups.com>

Hi,

Our class has its attributes set as classes, as in

MyClass.Phone.Value='34562346'
MyClass.Phone.Private=True

Inside the MyClass definition we have a function like this:

def MyFunc(self,clsProperty):
   if clsProperty.Private:
        print 'Private property'
   else:
        print ClsProperty.Value

In our code, we then call
>>> MyClass.MyFunc(MyClass.Phone)

We want to be able in our code instead simply to call:
>>> MyClass.MyFunc(Phone) or MyClass.MyFunc('Phone')

But we can't get it to work. If we rewrite the function as follows:

def MyFunc(self,attr):
   if self.attr.Private:
      print 'Private'
   else:
      print self.attr.Value

we get an error.

Is there a better way to do this? Thanks



From joshua at eeinternet.com  Tue Jan 23 17:17:12 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Tue, 23 Jan 2007 13:17:12 -0900
Subject: My python programs need a GUI, wxPython or PyQt4?
References: <ep60jp$63v$1@aioe.org>
Message-ID: <45b67cc1$0$24377$88260bb3@free.teranews.com>

Daniel Jonsson wrote:
> So, I've reached the point where my building pipeline tools actually
> needs to be used by other people in my company. By this reason I
> actually need to think about the usability, and I've come to the
> conclusion that I need a GUI. So, which of the two packages should I
> learn, and which one is easier to pick up?
> Thanks in advance!

Wow...are you *trying* to start a flamewar? :)

Anyway, here are a few points to think about.  This is by no means
exhaustive, and I'm sure others will add to (and/or correct) what I say. 
I'm most familiar with Qt, so my comments will be directed that way.

Qt4 *is* GPL, but you can only use it for free if the software you're
writing is GPL.  So, if there is no issue with you making your source code
public, there is no problem using Qt.  wxWindows is essentially LGPL, so
might be easier to use, depending on how closely you need to hold your
source code.

wxWindows uses Gtk widgets on *nix.  In *my opinion* the Qt widgets look
better, but that's just me.

>From what I've seen of the PyQt4 API, it's very clean and easy to use.

You can design your forms using the standard QtDesigner and compile them to
Python by using py-uic.  You can also load .ui files at run time if you
want.  I have no idea of the form design facilities in wxWindows, others
can add their input there.

It's very easy to create forms with QtDesigner.  And also easy to make sure
they still nicely laid out and proportionate by using layouts and spacers.

Anyway, those are the thoughts off the top of my head, I'll chime in again
if I think of more.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From mart_in_medina at ya___.es  Wed Jan 10 10:20:54 2007
From: mart_in_medina at ya___.es (martin griffith)
Date: Wed, 10 Jan 2007 16:20:54 +0100
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
	<1p9d74-5i71.ln1@stratos.fenelon.com>
Message-ID: <t11aq2prerpa5acu09ec81nsfg959bukee@4ax.com>

On Tue, 9 Jan 2007 20:16:01 +0000, in comp.arch.embedded Pete Fenelon
<pete at fenelon.com> wrote:

>In comp.arch.embedded octabox at gmail.com wrote:
>> Hello all,
>> 
>> I represent Octabox, an Internet Start-up developing a wide-scale
>
>Hello. F*ck off, spammer.
>
>
>pete
a bit more subtle
http://www.tagzin.com/main.aspx?cat=v&q=history


martin


From steven.bethard at gmail.com  Sun Jan 28 01:49:02 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 27 Jan 2007 23:49:02 -0700
Subject: distutils, sdist and tests
In-Reply-To: <mailman.3235.1169934632.32031.python-list@python.org>
References: <Jaudna0fMYmIBCbYnZ2dnUVZ_sKunZ2d@comcast.com>
	<mailman.3235.1169934632.32031.python-list@python.org>
Message-ID: <rMCdneRK2KTG2iHYnZ2dnUVZ_oTinZ2d@comcast.com>

Robert Kern wrote:
> Steven Bethard wrote:
>> How do I get distutils to include my testing module in just the "sdist" 
>> distribution?
> 
> Use a MANIFEST.

Thanks again to Robert Kern for all the help.  For the record, in the 
end all I did was add a MANIFEST.in file with the single line:

     include test_argparse.py

and "test_argparse.py" got included in the source distribution and left 
out of the binary distributions.

It's a pity there's no way to specify something this simple in the 
setup.py file, but since I'm not offering to maintain distutils, I guess 
I don't really have a right to complain. ;-)

STeVe


From kj7ny at nakore.com  Thu Jan 11 19:52:12 2007
From: kj7ny at nakore.com (kj7ny)
Date: 11 Jan 2007 16:52:12 -0800
Subject: Is there a good example on instantiating, calling, using,
	an API from Python on Windows?
In-Reply-To: <45A6CA45.3000300@websafe.com>
References: <1168541166.457806.133320@p59g2000hsd.googlegroups.com>
	<45A6CA45.3000300@websafe.com>
Message-ID: <1168563132.224441.212130@51g2000cwl.googlegroups.com>

To be more exact, I am trying to use Python to talk to a Livelink
system (http://www.opentext.com/) through their LAPI interface (.dll's,
I think).  I'll see if I can generate a more intelligent answer to your
question, but for now, I'm far enough in the dark that this is as good
as I can get.

Thanks,



From jdillworth at gmail.com  Wed Jan  3 11:49:12 2007
From: jdillworth at gmail.com (Jeremy Dillworth)
Date: 3 Jan 2007 08:49:12 -0800
Subject: Synchronization methodology
In-Reply-To: <mailman.2231.1167803272.32031.python-list@python.org>
References: <mailman.2231.1167803272.32031.python-list@python.org>
Message-ID: <1167842950.012349.207780@s34g2000cwa.googlegroups.com>

Hi Chris,

Have you looked at the mutex module?

Jeremy



From gandalf at designaproduct.biz  Tue Jan  9 04:39:59 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Tue, 09 Jan 2007 10:39:59 +0100
Subject: How to write temporary data to file?
In-Reply-To: <45A31767.9030404@gmx.net>
References: <45A31767.9030404@gmx.net>
Message-ID: <45A362EF.1080006@designaproduct.biz>

Thomas Ploch ?rta:
> Hi folks,
>
> I have a data structure that looks like this:
>
> d = {
> 	'url1': {
> 		'emails': ['a', 'b', 'c',...],
> 		'matches': ['d', 'e', 'f',...]
> 	},
> 	'url2': {...
> }
>
> This dictionary will get _very_ big, so I want to write it somehow to a
> file after it has grown to a certain size.
>
> How would I achieve that?
>   
How about dbm/gdbm? Since urls are strings, you can store this dict in a 
database instance and actually use it from your program as it were a dict?

   Laszlo



From nogradi at gmail.com  Sat Jan 13 09:18:58 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sat, 13 Jan 2007 15:18:58 +0100
Subject: sqlobject 0.8.0b1 and python 2.5
Message-ID: <5f56302b0701130618u4f47296fv73426a32064e81cd@mail.gmail.com>

Hi list,

I get loads of DeprecationWarnings while using sqlobject 0.8.0b1 with
python 2.5. Does this mean that the sqlobject project is not very up
to date? Or should I just ignore them and happily use it? In general,
what's the status of sqlobject, will it be dropped altogether after
sqlobject2 is out?

Anyone's experience with this version of sqlobject would be very
helpful. Since I'm starting to use sqlobject right now, if there is a
similar ORM tool that is comparable but up to date and actively
developed, that would be an option too. (Things like SQLAlchemy are
waaaay to complicated and complex for my needs. :))

Thanks,
Daniel


From tim.one at comcast.net  Mon Jan  8 14:09:02 2007
From: tim.one at comcast.net (Tim Peters)
Date: Mon, 08 Jan 2007 13:09:02 -0600
Subject: Q: About a programming problem with Python!
References: <1168270884.957998.251150@51g2000cwl.googlegroups.com>
Message-ID: <Xns98B28FF274866tim111one@216.196.97.136>

[followups set to comp.lang.python]

[Danny]
> I am just getting into OOP using Python and
> because of the floating point of large integer (L)
> square roots all the decimal expansions are truncated.
> This has created a problem because I need these
> decimal expansions in my algorithm other wise
> it adds more sub iterations slowing down
> greatly to the programs performance.
>
> Is there any way of retrieving these truncated decimal
> expansions up to a certain (n) with Python?

You want comp.lang.python for this, not sci.math.  Be sure to give a 
concrete example, giving a specific input and showing exactly as 
possible what you /want/ to achieve.  There are so many possible 
ambiguities in what you wrote here that few people will take time to 
guess at what you might have intended to ask.

> Java and I believe c++ do not have this problem
> but I am not about to learn any of these because 
> I like Python. 

Programming language has little to nothing to do with this, it's the 
data type you're using.  In Java, C++, and Python, if you're using the 
native double-precision floating-point type, you're limited to (on most 
machines) at most 53 bits of precision.

If you need more than that, you need to use a different data type.  For 
example, in recent versions of Python you could use the `decimal` 
module, and set its precision to virtually anything you like; e.g., 
under Python 2.5,

>>> import decimal
>>> t = decimal.Decimal(2)
>>> decimal.getcontext().prec  # show the default precision
28
>>> print t.sqrt()   # sqrt(2) rounded to 28 significant digits
1.414213562373095048801688724
>>> decimal.getcontext().prec = 56  # double the precision
>>> print t.sqrt()   # sqrt(2) to rounded to 56 significant digits
1.4142135623730950488016887242096980785696718753769480732



From bignose+hates-spam at benfinney.id.au  Mon Jan 15 16:54:09 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 16 Jan 2007 08:54:09 +1100
Subject: Conflicting needs for __init__ method
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
Message-ID: <874pqs7y7y.fsf@benfinney.id.au>

dickinsm at gmail.com writes:

> Suppose you're writing a class "Rational" for rational numbers.  The
> __init__ function of such a class has two quite different roles to
> play.

That should be your first clue to question whether you're actually
needing separate functions, rather than trying to force one function
to do many different things.

> First, it's supposed to allow users of the class to create Rational
> instances; in this role, __init__ is quite a complex beast.

The __init__ function isn't the "constructor" you find in other
languages. Its only purpose is to initialise an already-created
instance, not make a new one.

> It needs to allow arguments of various types---a pair of integers, a
> single integer, another Rational instance, and perhaps floats, Decimal
> instances, and suitably formatted strings.  It has to validate the
> input and/or make sure that suitable exceptions are raised on invalid
> input.  And when initializing from a pair of integers---a numerator
> and denominator---it makes sense to normalize: divide both the
> numerator and denominator by their greatest common divisor and make
> sure that the denominator is positive.

All of this points to having a separate constructor function for each
of the inputs you want to handle.

> But __init__ also plays another role: it's going to be used by the
> other Rational arithmetic methods, like __add__ and __mul__, to
> return new Rational instances.

No, it won't; those methods won't "use" the __init__ method. They will
use a constructor, and __init__ is not a constructor (though it does
get *called by* the construction process).

> For this use, there's essentially no need for any of the above
> complications: it's easy and natural to arrange that the input to
> __init__ is always a valid, normalized pair of integers.

Therefore, make your __init__ handle just the default, natural case
you identify.

    class Rational(object):
        def __init__(self, numerator, denominator):
            self.numerator = numerator
            self.denominator = denominator

> So the question is: (how) do people reconcile these two quite
> different needs in one function?

By avoiding the tendency to crowd a single function with disparate
functionality. Every function should do one narrowly-defined task and
no more.

        @classmethod
        def from_string(input):
            (n, d) = parse_elements_of_string_input(input)
            return Rational(n, d)

        @classmethod
        def from_int(input):
            return Rational(input, 1)

        @classmethod
        def from_rational(input):
            (n, d) = (input.numerator, input.denominator)
            return Rational(n, d)

        def __add__(self, other):
            result = perform_addition(self, other)
            return result

        def __sub__(self, other):
            result = perform_subtraction(self, other)
            return result

Put whatever you need to for 'parse_elements_of_string_input',
'perform_addition', 'perform_subtraction', etc; either the calculation
itself, if simple, or a call to a function that can contain the
complexity.

Use Python's exception system to avoid error-checking all over the
place; if there's a problem with the subtraction, for instance, let
the exception propagate up to the code that gave bad input.

The alternate constructors are decorated as '@classmethod' since they
won't be called as instance methods, but rather:

    foo = Rational.from_string("355/113")
    bar = Rational.from_int(17)
    baz = Rational.from_rational(foo)

-- 
 \          "If you can't beat them, arrange to have them beaten."  -- |
  `\                                                     George Carlin |
_o__)                                                                  |
Ben Finney



From martin at v.loewis.de  Thu Jan  4 03:36:09 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 04 Jan 2007 09:36:09 +0100
Subject: Cannot build 2.5 on FC6 x86
In-Reply-To: <503a8vF1d8dn2U1@mid.individual.net>
References: <502e72F1eh7ngU1@mid.individual.net>
	<459c0ac1$0$28366$9b622d9e@news.freenet.de>
	<503a8vF1d8dn2U1@mid.individual.net>
Message-ID: <459CBC79.8040901@v.loewis.de>

Paul Watson schrieb:
> Martin v. L?wis wrote:
>> Paul Watson schrieb:
>>> ./configure
>>> make
>>> make test
>>>
>>> The result appears to hang after the test_tkl... line.  I had to kill
>>> the 'make test' process which terminated it.  Any suggestions?

The only suggestion then is that you (or somebody else) would need to
debug the interpreter to find out what is happening - this specific
behaviour is not supposed to happen.

Regards,
Martin


From fuzzyman at gmail.com  Sun Jan  7 14:33:55 2007
From: fuzzyman at gmail.com (Fuzzyman)
Date: 7 Jan 2007 11:33:55 -0800
Subject: Capturing stderr and stdout of a subprocess as a single stream
Message-ID: <1168198435.629380.136080@42g2000cwt.googlegroups.com>

Hello all,

Before I ask the question a couple of notes :

* This question is for implementing a script inside the Wing IDE. For
some reason using the subprocess module doesn't work so I need a
solution that doesn't use this module.
* The platform is Windows and I'm happy with a Windoze only solution.
:-)

I would like to execute subprocesses asynchronously and capture stdout
/ stderr as a single stream.

If I use "os.popen3(executable)" it gives me separate pipes for stdout
and stderr, but reads from them are blocking.

The output on stdout and stderr may be interleaved and I would like to
display them *as* they arrive. That means I can't just read from them
and output the results.

The only solution I can think of is to read from both a character at a
time on two separate threads, putting the data into a queue. A separate
thread could pull characters off the queue and display them. (I don't
need to differentiate between stdout and stderr when I display.)

Can anyone think of a better solution ?

My current code works, but *doesn't* capture stderr :

from threading import Thread

pipe = os.popen(executable)

def DisplayOutput():
    while True:
        output = pipe.read(1)
        if not output:
            break
        display(output)

Thread(target=DisplayOutput).start()

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/articles.shtml



From pierre at saiph.com  Mon Jan  8 11:14:43 2007
From: pierre at saiph.com (Imbaud Pierre)
Date: Mon, 08 Jan 2007 17:14:43 +0100
Subject: closed issue
In-Reply-To: <4594130c$0$318$426a74cc@news.free.fr>
References: <4594130c$0$318$426a74cc@news.free.fr>
Message-ID: <45a26d04$0$317$426a74cc@news.free.fr>

I submitted a bug, to sourceforge. Was answered (pretty fast) the file
I dealt with was the buggy part. I then submitted a bug to the file
author, who agreed, and fixed. End of the story.
All I could complain about, with the xml.dom library, is how obscure
the exception context was: I did violate SOME xml rule, ideally the
exception should show the rule, and the faulty piece of data. But I
know this has a cost, both runtime cost and developper-s time cost.

Imbaud Pierre a ?crit :
> I am using the standard xml library to create another library able to 
> read, and maybe write,
> xmp files.
> Then an xml library bug popped out:
> xml.dom.minidom was unable to parse an xml file that came from an 
> example provided by an official organism.(http://www.iptc.org/IPTC4XMP)
> The parsed file was somewhat hairy, but I have been able to reproduce 
> the bug with a simplified
> version, that goes:
> 
> <?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?>
> <x:xmpmeta xmlns:x='adobe:ns:meta/' x:xmptk='XMP toolkit 3.0-28, 
> framework 1.6'>
> <rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#' 
> xmlns:iX='http://ns.adobe.com/iX/1.0/'>
> 
>  <rdf:Description rdf:about='uuid:f5b64178-9394-11d9-bb8e-a67e6693b6e9'
>   xmlns:xmpPLUS='XMP Photographic Licensing Universal System (xmpPLUS, 
> http://ns.adobe.com/xap/1.0/PLUS/)'>
>   <xmpPLUS:CreditLineReq>False</xmpPLUS:CreditLineReq>
>   <xmpPLUS:ReuseAllowed>False</xmpPLUS:ReuseAllowed>
>  </rdf:Description>
> 
> </rdf:RDF>
> </x:xmpmeta>
> <?xpacket end='w'?>
> 
> The offending part is the one that goes: xmpPLUS='....'
> it triggers an exception: ValueError: too many values to unpack,
> in  _parse_ns_name. Some debugging showed an obvious mistake
> in the scanning of the name argument, that goes beyond the closing
> " ' ".
> 
> Im aware I dont give here enough matter to allow full understanding
> of the bug. But thats not the place for this, and thats not my point.
> 
> Now my points are:
> - how do I spot the version of a given library? There is a __version__
>   attribute of the module, is that it?
> - How do I access to a given library buglist? Maybe this one is known,
>   about to be fixed, it would then be useless to report it.
> - How do I report bugs, on a standard lib?
> - I tried to copy the lib somewhere, put it BEFORE the official lib in
>   "the path" (that is:sys.path), the stack shown by the traceback
>   still shows the original files being used. Is there a special
>   mechanism bypassing the sys.path search, for standard libs? (I may
>   be wrong on this, it seems hard to believe...)
> 
> - does someone know a good tool to validate an xml file?
> 
> 
> btw, my code:
> 
> from nxml.dom import minidom
> ...
> class whatever:
>     def __init__(self, inStream):
>         xmldoc = minidom.parse(inStream)
> 
> 
> 
> Thanks for any help...



From weekender_ny at yahoo.com  Sat Jan 13 23:49:53 2007
From: weekender_ny at yahoo.com (John)
Date: 13 Jan 2007 20:49:53 -0800
Subject: Threaded for loop
In-Reply-To: <7xr6ty8ugv.fsf@ruckus.brouhaha.com>
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
	<7xr6ty8ugv.fsf@ruckus.brouhaha.com>
Message-ID: <1168750192.222440.89450@a75g2000cwd.googlegroups.com>


Damn! That is bad news. So even if caclulate is independent for (i,j)
and
is computable on separate CPUs (parts of it are CPU bound, parts are IO
bound)
python cant take advantage of this?

Surprised,
--j

Paul Rubin wrote:
> "John" <weekender_ny at yahoo.com> writes:
> > I want to do something like this:
> >
> > for i = 1 in range(0,N):
> >  for j = 1 in range(0,N):
> >    D[i][j] = calculate(i,j)
> >
> > I would like to now do this using a fixed number of threads, say 10
> > threads. What is the easiest way to do the "parfor" in python?
>
> It won't help in terms of actual parallelism.  Python only lets one
> thread run at a time, even on a multi-cpu computer.



From rkmr.em at gmail.com  Fri Jan 12 15:30:25 2007
From: rkmr.em at gmail.com (mark)
Date: Fri, 12 Jan 2007 12:30:25 -0800
Subject: dynamic argument name for functions
In-Reply-To: <1168633680.3382.96.camel@dot.uniqsys.com>
References: <e04d2e90701121217w32829ef9g4bd0af00b643dc2c@mail.gmail.com>
	<8c7f10c60701121222p2187225fn3e0559388a83a16e@mail.gmail.com>
	<1168633680.3382.96.camel@dot.uniqsys.com>
Message-ID: <e04d2e90701121230h18145420u2370f5d5e76671e7@mail.gmail.com>

On 1/12/07, Carsten Haese <carsten at uniqsys.com> wrote:
>
> On Fri, 2007-01-12 at 20:22 +0000, Simon Brunning wrote:
> > On 1/12/07, mark <rkmr.em at gmail.com> wrote:
> > > I want to pass a value to an argument of a function. The argument name
> is
> > > dynamic and is stored in a
> > >  variable. How do I call the function using with arg_name and value as
> the
> > > parameters.
> > >  thanks
> > >  arg_name = 'arg1'
> > >  arg_value = 'i am passing a value to argument 1'
> > >  function(???????)
> >
> > Untested:
> >
> > function(**{arg_name: arg_value})
>
> My version is superior: I tested it before replying. ;)


both work like charm! ;-)!
thanks
mark
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070112/78c19121/attachment.html>

From mail at microcorp.co.za  Wed Jan  3 01:21:46 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 3 Jan 2007 08:21:46 +0200
Subject: list/dictionary as case statement ?
References: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
Message-ID: <015101c72f00$8c43af60$03000080@hendrik>

"Stef Mientki" <S.Mientki-nospam at mailbox.kun.nl> wrote:

> 
> If I'm not mistaken, I read somewhere that you can use 
> function-names/references in lists and/or dictionaries, but now I can't 
> find it anymore.
> 
> The idea is to build a simulator for some kind of micro controller (just 
> as a general practise, I expect it too be very slow ;-).
> 
> opcodes ={
>    1: ('MOV', function1, ...),
>    2: ('ADD', function2, ),
>    3: ('MUL', class3.function3, )
>    }
> 
> def function1
>    # do something complex
> 
> 
> Is this possible ?

the short answer is : "Yes"

a slightly longer answer depends on what you want to do

If you want to write a simple assembler, your dict will look something like:

Mnemonics_to_Opcodes = 
{"MOV": [Functionnameforopcodeandtwooperands,movopcode],
"NOP":[Functionnameforopcodeonly,nopopcode],
"SETB":[Functionnameforopcodeandoneoperand,setbopcode],
"JMP":[Functionnameforopcodeandoneoperand,jmpopcode],
...
}

if you want to write a simulator only that "executes" the hex or binary,
then your dict needs to be something like this:

Opcodes =
{movopcode:[MovFunction,movinstructionlen],
nopopcod:[NopFunction,nopinstructionlen],
setbopcode:[SetbFunction,setbinstructionlen],
jmpopcode:[JmpFunction,jmpinstructionlen],
...
}

and then you write an "instruction fetcher" based on the
Program Counter that uses the length data in the dict and
calls the various functions with the operands as fetched from
memory. The easiest is to make the PC a global...

It works well - and it is surprisingly fast too...
And its easy if the opcodes are all say one byte,
else you need an opcode length field too, and fancier
parsing.

This is not the hassle with this kind of thing - the hassle comes
in trying to simulate the behaviour of the I/O of a real system...

hth - Hendrik




From robert.kern at gmail.com  Fri Jan 19 01:57:58 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 19 Jan 2007 00:57:58 -0600
Subject: Why this script can work?
In-Reply-To: <fbe35f750701182251l1cee4bf6q3982847d40ccd0bc@mail.gmail.com>
References: <fbe35f750701182251l1cee4bf6q3982847d40ccd0bc@mail.gmail.com>
Message-ID: <eopq60$d6q$1@sea.gmane.org>

Jm lists wrote:
> Please help with this script:
> 
> class ShortInputException(Exception):
>         '''A user-defined exception class.'''
>         def __init__(self,length,atleast):
>                 Exception.__init__(self)
>                 self.length=length
>                 self.atleast=atleast
> 
> try:
>         s=raw_input('Enter something --> ')
>         if len(s)<3:
>                 raise ShortInputException(len(s),3)
>         # Other work can continue as usual here
> except EOFError:
>         print '\nWhy did you do an EOF on me?'
> except ShortInputException,x:
>         print 'ShortInputException: The input was of length %d, was
> expecting at least %d' %(x.length,x.atleast)
> else:
>         print 'No exception was raised.'
> 
> 
> My questions are:
> 
> 1) ShortInputException,x:   what's the 'x'? where is it coming?

It's the actual ShortInputException instance that was raised. Try printing
x.length and x.atleast, for example.

> 2) The 'if' and 'else' are not in the same indent scope,why this can work?

This else: clause goes with the try: and except: clauses, not the if: clause. It
is executed if no exception was raised.

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

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From heikki at osafoundation.org  Fri Jan 19 14:18:30 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 19 Jan 2007 11:18:30 -0800
Subject: More M2Crypto issues
In-Reply-To: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>
References: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>
Message-ID: <naKdne0y8I4ahCzYnZ2dnUVZ_qednZ2d@comcast.com>

John Nagle wrote:
>   I've been running M2Crypto successfully using Python 2.4 on Windows 2000,
> and now I'm trying to get it to work on Python 2.3.4 on Linux.
> 
>   Attempting to initialize a context results in
> 
> Traceback (most recent call last):
[...]
>     map()[long(self.ctx)] = self
> ValueError: invalid literal for long(): _480e1008_p_SSL_CTX

This is almost certainly because of SWIG that is too old. The minimum
required is SWIG 1.3.24. If you cannot upgrade SWIG, the alternative
would be to play around with these values to fit your version of SWIG.

I'm adding this to the FAQ.

-- 
  Heikki Toivonen


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan 15 13:45:57 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 15 Jan 2007 19:45:57 +0100
Subject: Looking for Job
References: <1168881431.411312.98530@51g2000cwl.googlegroups.com>
Message-ID: <5120f5F1hccevU2@mid.individual.net>

fhk6431 at gmail.com wrote:

> Any one looking for job.. I need someone good at phyton

Sorry, you'll only sporadically find people competent with plants
here.

Regards,


Bj?rn

-- 
BOFH excuse #83:

Support staff hung over, send aspirin and come back LATER.



From paul at boddie.org.uk  Mon Jan  8 13:49:48 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 8 Jan 2007 10:49:48 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
	<%Isoh.22447$X97.12337@newsfe18.lga>
	<slrneq4nqc.k8.horpner@FIAD06.norwich.edu>
	<pjvoh.192$cQ2.1@read3.inet.fi>
	<mailman.2438.1168279974.32031.python-list@python.org>
Message-ID: <1168282188.449637.94280@42g2000cwt.googlegroups.com>

Chris Mellon wrote:
> Private data in the C++ and Java OO worlds is so taught so much and
> emphasized so often that people have started thinking of it as being
> desirable for its own sake. But the primary motivation for it grew out
> of the need to maintain compatible interfaces.

This is generally true, yes.

[...]

> Python doesn't have these problems, so the only use for private
> information is to warn your clients away from access to certain names.
> There's no need for compiler enforcement of that, as a convention is
> just as effective.

You'll have to be more clear, here. If you're writing a subclass of
some other class then any usage of private attributes in the superclass
potentially provides the benefit of a free choice in attribute names in
the subclass. If you wanted to warn people away from certain names, it
would be the public attributes that would require the warning, noting
that "your clients" in this context includes people extending classes
as well as those merely instantiating and using them.

> The remaining arguments are generally outgrowths of "but my code is
> SECRET", which just isn't true in general, even less true of Python,
> and not really a healthy attitude anyway.

I don't care about secret attributes, and the namespace privacy aspect
doesn't bother me enough to use private attributes anyway, especially
since I'm the author of most of the superclasses I'm extending. But
either providing namespace privacy or convenient tools to mitigate
namespace sharing seems fairly important to me, at least.

Paul



From Eugene.Antimirov at portaone.com  Wed Jan 31 09:39:13 2007
From: Eugene.Antimirov at portaone.com (Eugene Antimirov)
Date: Wed, 31 Jan 2007 16:39:13 +0200
Subject: another newbie question: why should you use "*args" ?
In-Reply-To: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
References: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
Message-ID: <45C0AA11.40407@portaone.com>

stef wrote:

> # method 2
>     def chunk_plot(self, list):
>         for i in range ( len(list) ):
>              .... do something


And one note more. Just to be more pythonic you shouldn't use form 
range(len(blabla)). Instead use:

for i in list:
....blabla...


-- 
Sincerely,
Eugene Antimirov
PortaOne, Inc., SIP Support Engineer
support at portaone.com



From perica.zivkovic at gmail.com  Fri Jan 12 17:09:41 2007
From: perica.zivkovic at gmail.com (perica.zivkovic at gmail.com)
Date: 12 Jan 2007 14:09:41 -0800
Subject: Portable Python - free portable development environment !
In-Reply-To: <mailman.2598.1168551029.32031.python-list@python.org>
References: <1168533423.224355.221390@k58g2000hse.googlegroups.com>
	<mailman.2598.1168551029.32031.python-list@python.org>
Message-ID: <1168639781.763133.319580@s34g2000cwa.googlegroups.com>

Right now there is not a big difference with Movable Python.
- Smaller size but less libraries in default package
- Portable Python comes with django
- Uses SciTE not SPE

but this is first release and I have big plans ;)

grtz

Perica

Steve Holden wrote:
> perica.zivkovic at gmail.com wrote:
> > Hi there,
> >
> > I would like to announce the *first* beta release of the Portable
> > Python 1.0 beta. From today Portable Python website is also online and
> > you can find it on the location www.PortablePython.com.
> >
> > About:
> > Portable Python is a Python programming language preconfigured to run
> > directly from a portable device (USB stick, iPod etc.), enabling you to
> > have, at any time, portable programming environment. Just download and
> > extract to your portable device and in 10 minutes you are ready to
> > create your next Python application. No registry modifications,
> > installations, totally portable.
> >
> > Where to find it:
> > http://www.portablepython.com
> >
> > regards,
> >
> > Perica Zivkovic
> >
> > P.S. did I mentioned that it is free? :-)
> >
> And what, besides is freeness, differentiates it from Movable Python?
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb     http://del.icio.us/steve.holden
> Blog of Note:          http://holdenweb.blogspot.com



From nmm1 at cus.cam.ac.uk  Thu Jan 18 15:14:03 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 18 Jan 2007 20:14:03 GMT
Subject: How to find out if another process is using a file
References: <eoo6vd$33u$1@gemini.csx.cam.ac.uk>
	<mailman.2878.1169141728.32031.python-list@python.org>
	<donn-66A101.12021118012007@gnus01.u.washington.edu>
Message-ID: <eookeb$1ar$1@gemini.csx.cam.ac.uk>


In article <donn-66A101.12021118012007 at gnus01.u.washington.edu>,
Donn Cave <donn at u.washington.edu> writes:
|> In article <mailman.2878.1169141728.32031.python-list at python.org>,
|>  "Gabriel Genellina" <gagsl-py at yahoo.com.ar> wrote:
|> > "Tom Wright" <tew24 at spam.ac.uk> escribi? en el mensaje 
|> > news:eoo6vd$33u$1 at gemini.csx.cam.ac.uk...
|> > 
|> > > I'm writing a program which reads a series of data files as they are 
|> > > dumped
|> > > into a directory by another process.  At the moment, it gets sporadic bugs
|> > > when it tries to read files which are only partially written.
|> > >
|> > > I'm looking for a function which will tell me if a file is opened in
|> > > write-mode by another process - if it is, my program will ignore it for 
|> > > now
|> > > and come back to it later.  This needs to work on linux and windows.  Mac
|> > > OS would be a bonus too.  An os-independent solution would be good, but I
|> > > could write os-specific options and have it pick the appropriate one.
|> > 
|> > Use os.open with the O_EXCL flag; will fail if the other process has the 
|> > file still open (and will fail if another process is reading the file, too, 
|> > not just if someone is writing).
|> 
|> O_EXCL fails if the file exists at all - whether closed or open.

Yes.  In theory.  In practice, it usually works on normal files, provided
that all opens are local.  Under some circumstances, it will even work
for NFS mounted files, as far as I recall.

MVS (now zOS) and other mainframe systems had what the poster wants, but
modern systems don't.  I shall not recommend that the poster asks IBM
for a copy of zOS, for reasons that will be well-known to anyone who used
MVS (which are NOT the ones claimed by the Unix brigade, which are mostly
bogus) :-)

Under Linux, you can do something with fuser, and I am pretty certain that
modern Macintoshes (i.e. BSD) will have an equivalent.  It can't be made
reliable (unlike under MVS), but might reduce the number of problems.


Regards,
Nick Maclaren.


From cvanarsdall at mvista.com  Fri Jan 26 19:07:20 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Fri, 26 Jan 2007 16:07:20 -0800
Subject: Off-Topic Posts
In-Reply-To: <8FF0B818-AD0B-4743-8D95-A84A7955F532@datafly.net>
References: <1169821615.198847.237790@m58g2000cwm.googlegroups.com>	<Xns98C4A515B6904someconundrum@216.196.97.131>	<1169852010.083168.81900@h3g2000cwc.googlegroups.com>	<1169852537.508485.13260@v33g2000cwv.googlegroups.com>
	<8FF0B818-AD0B-4743-8D95-A84A7955F532@datafly.net>
Message-ID: <45BA97B8.5000702@mvista.com>

Yea, that guy sucks.  Is there a list mod who can just ban this guy?

Sean Schertell wrote:
> Hey Genius -- I'm probably further to the left and even more  
> vehemently opposed to the Bush/Cheney regime than you are. But could  
> you *please* take your unwelcome ranting elsewhere? You're not  
> winning any converts here. And you're alienating your ideological  
> allies to boot. Give it a rest, m'kay?
>
> Sean
>
> P.S. Printing letters in all-caps and using extra exclamation points  
> doesn't necessarily make your argument any more compelling.
>
>
>
>
> On Jan 27, 2007, at 8:02 AM, thermate at india.com wrote:
>
>   
>> What did Dick Faced Cheney told Honorable Senator Patrick Leahy ?  
>> "Fuck
>> yourself".
>> So much for politeness and vulgarity at the top level.
>>
>> Proof:
>> http://www.capitolhillblue.com/news2/2007/01/the_madness_of.html
>>
>> On Jan 26, 2:53 pm, therm... at india.com wrote:
>>     
>>> Yeah, listen to wise counsel of klein. As a member of conquered races
>>> and still under occupation, namely Jewish, French, German, Japanese,
>>> Korean ... dont mess in the crimes of the anglo-saxon yanks. You  
>>> should
>>> remember the beating you got from the Anglo-Saxon Yanks and just keep
>>> quiet ... As for the lunatics off their meds, its also true that 911
>>> was a grand optical illusion and thus within the charter of this  
>>> group
>>> to study ... After all, one of its proponent is the former head of  
>>> Star
>>> Wars, Dr Bob Bowman from MIT and Caltech ... Do you have a degree  
>>> from
>>> those prestigious institutes or did you manage to get any of your  
>>> kids
>>> into one of them ??? As for vulgarity, its the mark of patriotism ...
>>> the constitutional amendments guarantee it and Herbert Walker Bush  
>>> was
>>> a strongly suspected pedophile ... there is a video called conspiracy
>>> of silence, watch it on video.google.com and download with before the
>>> fascist bureau of incompetence bastards (running around like crazy  
>>> rats
>>> to confiscate pentagon videos on that day in destruction of evidence)
>>> try to sabotage the google servers ... they are part of the crime and
>>> complicit in it. If they were competent, we would see one consistent
>>> theory coming out from that bureau to explain all significant  
>>> events on
>>> that day. Now dont forget the SHITTY job done by FEMA and NIST. There
>>> are gaping holes in their work.
>>>
>>> Hey Kinch, if you are jewish, did you forget that England was the  
>>> first
>>> country to expel the Jews.
>>>
>>> If you forget your status as conquered races, then you are in  
>>> delusion,
>>> not anyone else.
>>>
>>> The final balance of power provided against the anglos will be by
>>> Slavs. Hurray to Vladimir Putin, and Mikhail Khodorkovsky in a  
>>> Siberian
>>> jail.
>>>
>>> On Jan 26, 1:13 pm, Richard J Kinch <k... at truetex.com> wrote:
>>>
>>>       
>>>> alex writes:
>>>>         
>>>>> I have only just joined this group, but have noticed a  
>>>>> significant rise
>>>>> in off-topic posts that really detract from what is otherwise an
>>>>> excellent place to learn and talk about optics.This has nothing  
>>>>> to do with sci.optics.  Recent days have seen this stuff
>>>>>           
>>>> being broadcast mechanically into all sorts of groups.
>>>>         
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
>>     
>
> ::::  DataFly.Net  ::::
> Complete Web Services
> http://www.datafly.net
>
>   


-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From ernst.karner at gmail.com  Mon Jan 15 05:24:50 2007
From: ernst.karner at gmail.com (diego)
Date: 15 Jan 2007 02:24:50 -0800
Subject: Problem with win32pipe.popen2
Message-ID: <1168856689.749595.74440@q2g2000cwa.googlegroups.com>

I'm trying to understand how popen2 works. Found in this group, that
popen2.popen2 can cause trouble so i chose win32pipe.popen2.

have a look a the listing of 2 files:
ekmain.py:
**************
import win32pipe

(stdin1, stdout1) = win32pipe.popen2("test1.py")
stdin1.write("1\n")
print stdout1.readlines() # This will print the result.
**************

test1.py:
**************
a=raw_input("a=")
print "***a=",a
print "finished!"
**************


i do not understand, why ekmain.py produces only following output:
['a=']

why is the stdin1.write("1\n") command ignored?

i tried to find an answer in this group by searching through existing
article, but i had no success.

tanks for you help!


ernst
p.s.: i working with python 2.3 on win2000.



From http  Thu Jan 25 15:00:56 2007
From: http (Paul Rubin)
Date: 25 Jan 2007 12:00:56 -0800
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
	<ep9t4g$uf$1@gemini.csx.cam.ac.uk>
	<1169751828.986583.47200@j27g2000cwj.googlegroups.com>
	<epb0s7$g2s$1@gemini.csx.cam.ac.uk>
	<1169754601.992058.205640@q2g2000cwa.googlegroups.com>
Message-ID: <7xsldy7u6f.fsf@ruckus.brouhaha.com>

"Paddy" <paddy3118 at netscape.net> writes:
> No, you should think of the service that needs to be up. You seem to be
> talking about how it can't be fixed rather than looking for ways to
> keep things going.

But you're proposing cargo cult programming.  There is no reason
whatsoever to expect that restarting the server now and then will help
the problem in the slightest.  Nick used the fancy term Poisson
process but it just means that the probability of failure at any
moment is independent of what's happened in the past, like the
spontaneous radioactive decay of an atom.  It's not like a mechanical
system where some part gradually gets worn out and eventually breaks,
so you can prevent the failure by replacing the part every so often.

> A little learning is fine but "it can't theoretically be fixed" is
> no solution.

The best you can do is identify the unfixable situations precisely and
work around them.  Precision is important.

The next best thing is have several servers running simultaneously,
with failure detection and automatic failover.  

If a server is failing at random every few months, trying to prevent
that by restarting it every so often is just shooting in the dark.
Think of your server stopping now and then because there's a power
failure, where you get power failures every few months on the average.
Shutting down your server once a month, unplugging it, and plugging it
back in will do nothing to prevent those outages.  You need to either
identify and fix whatever is causing the power outages, or install a
backup generator.


From tmaroff at yahoo.com  Thu Jan 11 09:45:28 2007
From: tmaroff at yahoo.com (Tristan)
Date: 11 Jan 2007 06:45:28 -0800
Subject: IDLE Python and Environment Variables
In-Reply-To: <mailman.2557.1168493578.32031.python-list@python.org>
References: <1168482248.828858.161320@i39g2000hsf.googlegroups.com>
	<mailman.2557.1168493578.32031.python-list@python.org>
Message-ID: <1168526728.313917.309340@o58g2000hsb.googlegroups.com>

Thanks Gabriel.

> What kind of environment variables? Those used by Python itself, like
> PYTHONPATH? Or your own variables, like FOO_LOCATION=C:\My\Projects\Lib\Foo

I need to add to PYTHONPATH and other enviroment variables asked, for
example, by DJANGO or other python products.

> It appears that your variables are some kind of configuration - in
> this case it has more sense to put such configuration in another
> place, like a config file, and forget about environment variables.
> You can use the usual .ini Windows format and read it with
> ConfigParser. You can pass your script the name of the ini file to
> read - this would be the equivalent of using different .bat files to
> call the same script.
> This way it doesn't matter whether you invoke your application using
> python command line, or inside IDLE, or inside another environment.

I considered to use it, thanks!!  Incidentally (beg your pardon if it
sounds to ignorance), can I define Environment variables in a config
file and then apply to my python program?

Thanks!!!



From nmm1 at cus.cam.ac.uk  Fri Jan 26 04:05:00 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 26 Jan 2007 09:05:00 GMT
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
	<ep9t4g$uf$1@gemini.csx.cam.ac.uk>
	<1169751828.986583.47200@j27g2000cwj.googlegroups.com>
	<epb0s7$g2s$1@gemini.csx.cam.ac.uk> <116975460
Message-ID: <epcg7s$gal$1@gemini.csx.cam.ac.uk>


In article <mailman.3176.1169771514.32031.python-list at python.org>,
skip at pobox.com writes:
|> 
|> What makes you think Paddy indicated he wouldn't try to solve the problem?
|> Here's what he wrote:
|> 
|>     What I'm proposing is that if, for example, a process stops running
|>     three times in a year at roughly three to four months intervals , and it
|>     should have stayed up; then restart the server sooner, at aa time of
|>     your choosing, whilst taking other measures to investicate the error.
|> 
|> I see nothing wrong with trying to minimize the chances of a problem rearing
|> its ugly head while at the same time trying to investigate its cause (and
|> presumably solve it).

No, nor do I, but look more closely.  His quote makes it quite clear that
he has got it firmly in his mind that this is a degradation problem, and
so regular restarting will improve the reliability.  Well, it could also
be one where failure becomes LESS likely the longer the server stays up
(i.e. the "settling down" problem).

No problem is as hard to find as one where you are firmly convinced that
it is somewhere other than where it is.


Regards,
Nick Maclaren.


From bdesth.quelquechose at free.quelquepart.fr  Mon Jan 29 16:26:28 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 29 Jan 2007 22:26:28 +0100
Subject: List Behavior when inserting new items
In-Reply-To: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
References: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
Message-ID: <45be5fa3$0$1529$426a34cc@news.free.fr>

Drew a ?crit :
> I'm looking to add an element to list of items, however I'd like to 
> add it at a specific index greater than the current size:
> 
> list = [1,2,3]

NB: better to avoid using builtins types and functions names as identifiers.

> list.insert(10,4)
> 
> What I'd like to see is something like:
> 
> [1,2,3,,,,,,4]

Hint : the Python representation of nothing is a singleton object named 
None.

> However I see:
> 
> [1,2,3,4]

Yeps. I thought it would have raised an IndexError. But I seldom use 
list.insert() to append to a list - there's list.append() (and/or 
list.extend()) for this.

> Is there any way to produce this kind of behavior easily?

Hints:
 >>> [None] * 5
[None, None, None, None, None]
 >>> [1, 2, 3, None] + [10]
[1, 2, 3, None, 10]

HTH


From smusnmrNOSPAM at yahoo.com  Fri Jan  5 13:51:11 2007
From: smusnmrNOSPAM at yahoo.com (Siggi)
Date: Fri, 5 Jan 2007 19:51:11 +0100
Subject: where is Microsoft Speech Object Library 5.1 option inPythonWin
	2.5?
References: <enln3h$6sc$1@zam602.zam.kfa-juelich.de>
	<mailman.2330.1168015570.32031.python-list@python.org>
Message-ID: <enm6ip$9b5$1@zam602.zam.kfa-juelich.de>

Gabriel Genellina wrote:

> After you download and install version 5.1, it should appear on the list.

It should, but it does not! Shutting down and starting the WinXP Home system 
anew did not help.
The SDK 5.1 installation went smoothly, however. What can I do to find out
what is wrong?

siggi

"Gabriel Genellina" <gagsl-py at yahoo.com.ar> schrieb im Newsbeitrag
news:mailman.2330.1168015570.32031.python-list at python.org...
> At Friday 5/1/2007 11:24, siggi wrote:
>
>>However, in my Python 2.5/PythonWin 2.5 installation I find as only option
>>"Microsoft Speech Object Library 5.0" to select.
>
> This list shows all the COM objects currently registered in Windows, does
> not depend on Pythonwin.
>
>>Unfortunately, 5.1 is the lowest SDK version I found on
>>http://www.microsoft.com/downloads/details.aspx?FamilyId=5E86EC97-40A7-453F-B0EE-6583171B4530&displaylang=en#QuickInfoContainer
>
> After you download and install version 5.1, it should appear on the list.
>
>
> -- 
> Gabriel Genellina
> Softlab SRL
>
>
>
>
>
> __________________________________________________ Pregunt?. Respond?.
> Descubr?. Todo lo que quer?as saber, y lo que ni imaginabas, est? en
> Yahoo! Respuestas (Beta). ?Probalo ya! http://www.yahoo.com.ar/respuestas





From alain.walter at thalesgroup.com  Wed Jan 24 06:03:59 2007
From: alain.walter at thalesgroup.com (awalter1)
Date: 24 Jan 2007 03:03:59 -0800
Subject: use of a GChildWatch source
Message-ID: <1169636639.256213.146060@k78g2000cwa.googlegroups.com>

Hello

I am using python, pyGTK and GTK+ on HPUX (unix)
In this context, the pygtk documentation about gobject.spawn_async says
: ... you must use a GChildWatch source to be notified about the death
of the child process ...
Does someone know where to find details about GChildWatch ? I didn't
retrieve any thing on the net.
In addition, does someone be aware about some limitations concerning
subprocesses creation in a python/GTK application
Thanks a lot



From fredrik at pythonware.com  Thu Jan 25 05:11:54 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 25 Jan 2007 11:11:54 +0100
Subject: Fast Imaging for Webserver
References: <1169707586.701908.32860@v45g2000cwv.googlegroups.com>
Message-ID: <ep9vpb$agu$2@sea.gmane.org>

"Prateek" wrote:

> Hi. I'm creating a web-application using CherryPy 2.2.1. My application
> needs to process images (JPG/PNG files) to
>
> 1) create thumbnails (resize them)
> 2) overlay them on a custom background (a simple frame)
> 3) Overlay 'badges' (small 16x16 images) on top of the final thumbnail
>
> I am using PIL 1.1.5 which I have custom compiled on my development
> machine (MacBook Pro 2.33Ghz Core Duo)..
> I am using im.thumbnail for step 1 and im.paste for steps 2 and 3.
>
> The problem is that this thing is just way too slow.
> For ab -n 1000 -C session_id=2f55ae2dfefa896f67a80f73045aadfa4b4269f1
> http://localhost:8080/imaging/icon/def/128/255 (where def is the name
> of the image - default in this case - 128 is the size in pixels and 255
> is the background color), I am getting:
>
> Document Path:          /imaging/icon/def/128/255
> Document Length:        14417 bytes
>
> Concurrency Level:      1
> Time taken for tests:   18.664 seconds
> Complete requests:      1000
> Failed requests:        0
> Broken pipe errors:     0
> Total transferred:      14680000 bytes
> HTML transferred:       14417000 bytes
> Requests per second:    53.58 [#/sec] (mean)
> Time per request:       18.66 [ms] (mean)
> Time per request:       18.66 [ms] (mean, across all concurrent
> requests)
> Transfer rate:          786.54 [Kbytes/sec] received
>
> FYI: This request returns a PNG image (image/png) and not html
>
> My understanding is that the problem is either with the CherryPy setup
> (which is likely because even in other cases, i don't get much more
> than 65 requests per second) or PIL itself (even though I'm caching the
> background images and source images)

without knowing more about what kind of source images you're using, the
amount of data they represent etc, it's not entirely obvious to me that 50+
images per second on a single server is that bad, really.  unless the source
images are rather tiny, that's plenty of pixels per second to crunch.

are you really receiving more than 4500000 source images per day per
server?

</F> 





From jstroud at mbi.ucla.edu  Mon Jan 22 00:59:08 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 21 Jan 2007 21:59:08 -0800
Subject: Help with 'popen'
In-Reply-To: <1169436640.161806.111510@38g2000cwa.googlegroups.com>
References: <1169436640.161806.111510@38g2000cwa.googlegroups.com>
Message-ID: <ep1jrc$sla$1@daisy.noc.ucla.edu>

stephen_b wrote:
> Can someone let me know why this won't work? Thanks.
> 
> 
>>>>from os import popen
>>>>popen('export asdfasdf=hello').read()
> 
> ''
> 
>>>>popen('echo $asdfasdf').read()
> 
> '\n'
> 
> Thanks.
> 
> Stephen
> 

Python starts a new shell for each command, so your environment variable 
is lost. You probably want this, which makes the variable "permanent".

py> import os
py> os.environ['asdfasdf'] = 'hello'
py> os.popen('echo $asdfasdf').read()
'hello\n'

James


From sturlamolden at yahoo.no  Sun Jan 21 13:42:01 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 21 Jan 2007 10:42:01 -0800
Subject: A solution to the MSVCRT vs MSVCR71 problem?
In-Reply-To: <mailman.2958.1169368253.32031.python-list@python.org>
References: <1169348867.369917.104970@m58g2000cwm.googlegroups.com>
	<mailman.2958.1169368253.32031.python-list@python.org>
Message-ID: <1169404921.709667.192280@38g2000cwa.googlegroups.com>


Gabriel Genellina wrote:

> This would only work, if runtime dll's were compatibles between them,
> and they are not. 

It is standard C, defined by ANSI and ISO.



From roland.hedberg at adm.umu.se  Wed Jan  3 03:29:01 2007
From: roland.hedberg at adm.umu.se (Roland Hedberg)
Date: Wed, 03 Jan 2007 09:29:01 +0100
Subject: import order or cross import
Message-ID: <459B694D.4060904@adm.umu.se>

Hi!

I'm having a bit of a problem with import.

I'm writing a marshalling system that based on a specification will
create one or more files containing mostly class definitions.

If there are more than one file created (and there are reasons for
creating more than one file in some instances) then they will import
each other since there may be or is interdependencies in between them.

And this is where the going gets tough.

Let's assume I have the following files:

------------- ONE.py --------------------

import TWO

class Car:
    def __init__(self):
        self.color = None

    def set_color(self,v):
        if isinstance(v,TWO.Black) or isinstance(v,TWO.White):
            self.color = v

class BaseColor:
    def __init__(self):
	pass
    def __str__(self):
        return self.color

if __name__ == "__main__":
    car = Car()
    color = TWO.Black()
    car.set_color(color)
    print car.color

-------------- TWO.py -------------------

import ONE

class Black(ONE.BaseColor):
    color = "Black"
    def __init__(self):
        ONE.BaseColor.__init__(self)

class White(ONE.BaseColor):
    color = "White"
    def __init__(self):
        ONE.BaseColor.__init__(self)

-----------------------------------------

Now, running ONE.py causes no problem it will print "Black", but running
TWO.py I get:
AttributeError: 'module' object has no attribute 'BaseColor'

So, how can this be solved if it can be ?

To join ONE.py and TWO.py into one file could be a solution if there
where no other conditions (non-language based) that prevented it.

-- Roland



From http  Mon Jan 29 09:06:21 2007
From: http (Paul Rubin)
Date: 29 Jan 2007 06:06:21 -0800
Subject: Random passwords generation (Python vs Perl) =)
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<1170064302.264009.12650@p10g2000cwp.googlegroups.com>
Message-ID: <7xveiqapwi.fsf@ruckus.brouhaha.com>

"Paul McGuire" <ptmcg at austin.rr.com> writes:
> from random import choice

Security note: if you're trying to generate real passwords this way,
you're better off using os.urandom instead of the random module to
generate the random numbers.  The random module's results are supposed
to be statistically uncorrelated (good for stuff like games and
simulations) but they don't try to resist guessing by malicious
attackers.  os.urandom results are supposed to be unguessable.


From bj_666 at gmx.net  Wed Jan 24 11:49:22 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 24 Jan 2007 17:49:22 +0100
Subject: Thoughts on using isinstance
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<mailman.3077.1169645738.32031.python-list@python.org>
	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>
	<mailman.3087.1169652310.32031.python-list@python.org>
	<1169656371.689791.216360@v33g2000cwv.googlegroups.com>
Message-ID: <pan.2007.01.24.16.49.21.555688@gmx.net>

In <1169656371.689791.216360 at v33g2000cwv.googlegroups.com>, abcd wrote:

> Well my example function was simply taking a string and printing, but
> most of my cases would be expecting a list, dictionary or some other
> custom object.  Still propose not to validate the type of data being
> passed in?

Yes because usually you don't expect a list or dictionary but some object
that *acts* like a list or dictionary.  Or you even expect just some
aspects of the type's behavior.  For example that it is something you can
iterate over.

Ciao,
	Marc 'BlackJack' Rintsch


From S.Mientki-nospam at mailbox.kun.nl  Sun Jan 28 10:58:01 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sun, 28 Jan 2007 16:58:01 +0100
Subject: howto redirect and extend help content ?
Message-ID: <1fc1a$45bcc7f4$d443bb3a$8806@news.speedlinq.nl>

I'm making special versions of existing functions,
and now I want the help-text of the newly created function to exists of
1. an extra line from my new function
2. all the help text from the old function

# the old function
def triang(M,sym=1):
     """The M-point triangular window.    <== old help text
     """
     ....

# the new function
def chunked_triang(M):
     """ Chunked version of "triang"      <== the extra line
     """

 >>> help(chunked_triang)
# should give something like

chunked_triang(M)                        <== the new definition
     Chunked version of "triang"          <== the extra line
     The M-point triangular window.       <== old help text

Is that possible ?


thanks,
Stef Mientki


From bearophileHUGS at lycos.com  Fri Jan 19 16:30:55 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 19 Jan 2007 13:30:55 -0800
Subject: Py 2.5 on Language Shootout
Message-ID: <1169242255.023147.310570@38g2000cwa.googlegroups.com>

The The Computer Language Shootout has just published results for
Python 2.5 and Psyco 1.5.2. Comparing the old (Python 2.4) Gentoo
Pentium 4 results (now not visible anymore) with the new results, I
have seen that all the tests with Python 2.5 are faster than the ones
with Python 2.4 (some results can't be compared because N is changed):

Gentoo Pentium 4, Python 2.4.3 measurements:
Program & Logs      CPU Time   Memory KB   GZip           N
binary-trees           99.26      15,816    402          16
chameneos             Timout                      5.000.000
cheap-concurrency      23,13       5.252    160      15.000
fannkuch               66,38       2.200    395          10
fasta                  81,62       9.884    861   2.500.000
k-nucleotide           15,52      15.580    459     250.000
mandelbrot            363,86       2.412    472       3.000
n-body                Timout                     20.000.000
nsieve                  9,79      34.416    269           9
nsieve-bits           164,72      42.412    320          11
partial-sums           38,64       2.300    410   2.500.000
pidigits                9,22       2.388    391       2.500
recursive             701,64      14.360    344          11
regex-dna               6,21      24.160    326     500.000
reverse-complement       2,7      46.032    272   2.500.000
spectral-norm         696,76       2.456    266       2.500
startup                 6,38                 29         200
sum-file                8,08       2.364     61       8.000


Regarding Psyco, two tests only are worse (the sourcecode, CPU and SO
are the same):

Old (Python 2.4.3, older Psyco):
nsieve	4.22	22,680	211	 9
reverse-complement	1.66	49,336	330	 2,500,000

New (Python 2.5, Psyco 1.5.2):
nsieve	4.26	22,904	211	 9
reverse-complement	1.75	52,056	330	 2,500,000

Bye,
bearophile



From ldo at geek-central.gen.new_zealand  Fri Jan  5 01:48:44 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 05 Jan 2007 19:48:44 +1300
Subject: How do I add users using Python scripts on a Linux machine
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
	<ene0j1$6nk$03$1@news.t-online.com>
	<m2fyatcddg.fsf@ordesa.cs.uu.nl>
	<eng5qv$6l4$00$1@news.t-online.com>
	<m2hcv651ta.fsf@ordesa.cs.uu.nl>
Message-ID: <enks9m$nsh$1@lust.ihug.co.nz>

In message <m2hcv651ta.fsf at ordesa.cs.uu.nl>, Piet van Oostrum wrote:

> The scenario is as follows: Suppose the script starts with the line:
> #!/usr/bin/python
> 
> (using #!/usr/bin/env python would be disastrous because the user could
> supply his own `python interpreter' in his PATH.)
> 
> Now a malicious user can make a link to this file in his own directory,
> e.g. to /Users/eve/myscript1. Because permissions are part of the file
> (inode), not of the file name, this one is also suid.
> 
> Now she execs /Users/eve/myscript1. The kernel, when honoring suid
> scripts, would startup python with effective uid root with the command
> line: /usr/bin/env /Users/eve/myscript1

No it wouldn't. This security hole was fixed years ago.



From carsten at uniqsys.com  Sat Jan 27 03:34:15 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 27 Jan 2007 03:34:15 -0500
Subject: python+ncurses: I can't display accents
In-Reply-To: <45bb02bf$0$26684$426a34cc@news.free.fr>
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
	<45ba50c7$0$31432$426a74cc@news.free.fr>
	<slrnerks72.jc.horpner@FIAD06.norwich.edu>
	<12rl5mq4nnqoea0@corp.supernews.com>
	<45bafda7$0$2417$426a74cc@news.free.fr>
	<45bb02bf$0$26684$426a34cc@news.free.fr>
Message-ID: <20070127081443.M5483@uniqsys.com>

On 27 Jan 2007 07:43:59 GMT, Fabrice DELENTE wrote
> Incidentally, I noticed something about the environment: in my 
> script, I use the LINES and COLUMNS environment vars that are set in 
> my shell:
> 
> columns=int(os.environ.get("COLUMNS"))
> lines=int(os.environ.get("LINES"))
> 
> In the shell, I get
> 
> $ echo $LINES $COLUMNS
> 89 199
> 
> but python doesn't get these values. I have to start the script with
> 
> $ LINES=$LINES COLUMNS=$COLUMNS ./sort_entries.py
> 
> How come?

There is a distinction between shell variables and environment variables. In
all likelihood, LINES and COLUMNS are shell variables, not environment
variables. Try "export LINES COLUMNS" to set them as environment variables.

HTH,

Carsten.



From gagsl-py at yahoo.com.ar  Tue Jan 16 12:32:33 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 16 Jan 2007 14:32:33 -0300
Subject: Check a windows service
References: <1168966952.965088.17740@l53g2000cwa.googlegroups.com>
Message-ID: <eoj272$5te$1@sea.gmane.org>

"awel" <albert.wellens at gmail.com> escribi? en el mensaje
news:1168966952.965088.17740 at l53g2000cwa.googlegroups.com...

> I'm new in python and I would like to know if it's possible to check if
> a specific windows service is present and if it's possible how can I
> do?

Yes, using the wmi module, but you'll have to search the Microsoft
documentation on how to enumerate services and their properties:
http://msdn2.microsoft.com/en-us/library/aa384642.aspx
The code might look like this, but the names may be wrong:

import wmi
import pythoncom
pythoncom.CoInitialize()
w = wmi.WMI()
for s in w.Win32_Services():
  print s

-- 
Gabriel Genellina 




From deets at nospam.web.de  Wed Jan  3 20:52:07 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 04 Jan 2007 02:52:07 +0100
Subject: C/C++, Perl, etc. to Python converter
In-Reply-To: <mailman.2245.1167841661.32031.python-list@python.org>
References: <G3Qmh.94$9v1.124@nntpserver.swip.net>	<1167839629.435980.311750@k21g2000cwa.googlegroups.com>
	<mailman.2245.1167841661.32031.python-list@python.org>
Message-ID: <5034u9F1dg9r9U1@mid.uni-berlin.de>


> 
> I think that it *is* possible to do it, but a whole lot of work had to
> be done to achieve this. It is all about how many rules (like how to
> convert this block of unreadable code of language X into a readable
> python block) you are willing to find/program (and these are a lot). It
> is a almost gigantic task to make this work proper, but it definitely
> *is* possible.

It is definitely _not_ possible. There are so many design decisions that 
are differing based on what a language offers - e.g. generators, garbage 
collection, precise control over memory layout and so on.

Projects like jython or ironpython show that to some degree at least 
binary compatibility is feasible - but beyond that, machine generated 
cod will always be that, and by no means idiomatic.

Diez


From mail at microcorp.co.za  Sat Jan 27 04:30:19 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 27 Jan 2007 11:30:19 +0200
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org><ep8gue$3tu$1@panix3.panix.com>	<45B90118.5010408@mvista.com><01b001c7411d$17e52a20$03000080@hendrik>
	<45BA39D3.7020400@mvista.com>
Message-ID: <014501c741fa$64dbbbe0$03000080@hendrik>

 "Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote:
> Hendrik van Rooyen wrote:
> >  "Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote:

8< ---------------------------------------------------

> >   
> Yea, I do some of that too.  I use that with conditional print 
> statements to stderr when i'm doing my validation against my test 
> cases.  But I could definitely do more of them.  The thing will be 

When I read this - I thought - probably your stuff is working 
perfectly - on your test cases - you could try to send it some
random data and to see what happens - seeing as you have a test 
server, throw the kitchen sink at it.

Possibly "random" here means something that "looks like" data
but that is malformed in some way. Kind of try to "trick" the 
system to get it to break reliably.

I'm sorry I can't be more specific - it sounds so weak, and you
probably already have test cases that "must fail" but I don't 
know how to put it any better...

- Hendrik




From bytter at gmail.com  Tue Jan 30 20:11:05 2007
From: bytter at gmail.com (Hugo Ferreira)
Date: Wed, 31 Jan 2007 01:11:05 +0000
Subject: Synchronous shutil.copyfile()
In-Reply-To: <Vuj*fj+Br@news.chiark.greenend.org.uk>
References: <mailman.3305.1170169527.32031.python-list@python.org>
	<Vuj*fj+Br@news.chiark.greenend.org.uk>
Message-ID: <4e8efcf50701301711m1fb5a0ffi5b3080eed1517214@mail.gmail.com>

Well.. Thx for the answers.

The only way I had to make it work was to use a time.sleep(10) after the
shutil.copyfile(). Since this is a night-run script, I can waste 10 seconds,
but it still knocks me out "why" it happens...

Cheers!

Hugo Ferreira

On 30 Jan 2007 18:06:15 +0000 (GMT), Matthew Woodcraft <
mattheww at chiark.greenend.org.uk> wrote:
>
> Hugo Ferreira <bytter at gmail.com> wrote:
> > I have a problem. I'm using calling shutil.copyfile() followed by
> > open(). The thing is that most of the times open() is called before
> > the actual file is copied. I don't have this problem when doing a
> > step-by-step debug, since I give enough time for the OS to copy the
> > file, but at run-time, it throws an exception.
> >
> > Is there anyway to force a sync copy of the file (make python wait for
> > the completion)?
>
> shutil.copyfile() closes both files before it returns, so I suspect
> this is an OS-level bug.
>
> The most likely culprits are buggy network filesystems and buggy
> on-access virus scanners.
>
> -M-
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070131/326f36b9/attachment.html>

From paul at boddie.org.uk  Wed Jan 17 10:03:59 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 17 Jan 2007 07:03:59 -0800
Subject: Distributed computation of jobs (was: Parallel Python)
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
	<1168597288.571937.176430@s34g2000cwa.googlegroups.com>
	<eo7sj1$vn6$1@news.albasani.net>
	<slrneqs43f.p5f.hat@se-126.se.wtb.tue.nl>
Message-ID: <1169046239.405261.81740@m58g2000cwm.googlegroups.com>

A.T.Hofkamp skrev:
>
> Let me add a few cents to the discussion with this announcement:

[Notes about exec_proxy, batchlib and rthread]

I've added entries for these modules, along with py.execnet, to the
parallel processing solutions page on the python.org Wiki:

http://wiki.python.org/moin/ParallelProcessing

Thanks for describing your work to us!

Paul



From jstroud at mbi.ucla.edu  Fri Jan 19 23:48:39 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 19 Jan 2007 20:48:39 -0800
Subject: regexp qns
In-Reply-To: <1169268024.164643.71320@l53g2000cwa.googlegroups.com>
References: <1169268024.164643.71320@l53g2000cwa.googlegroups.com>
Message-ID: <eos6v7$4go$1@zinnia.noc.ucla.edu>

eight02645999 at yahoo.com wrote:
> hi
> suppose i have a string like
> 
> test1?test2t-test3*test4*test5$test6#test7*test8
> 
> how can i construct the regexp to get test3*test4*test5 and
> test7*test8, ie, i want to match * and the words before and after?
> thanks
> 


py> import re
py> s = 'test1?test2t-test3*test4*test5$test6#test7*test8'
py> r = re.compile(r'(test\d(?:\*test\d)+)')
py> r.findall(s)
['test3*test4*test5', 'test7*test8']

James


From rzantow at gmail.com  Sun Jan  7 17:21:27 2007
From: rzantow at gmail.com (rzed)
Date: Sun, 07 Jan 2007 17:21:27 -0500
Subject: where is python on linux?
References: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
	<45a157a0$0$289$426a74cc@news.free.fr>
Message-ID: <Xns98B1B092FD1ADrzantowgmailcom@208.49.80.253>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote 
in news:45a157a0$0$289$426a74cc at news.free.fr:

> Frank Potter a ?crit :
>> I installed fedora core 6 and it has python installed.
>> But the question is, where is the executable python file?
>> I can't find it so I come here for help.
> 
> man which
> 
> 

mmmmmmm... sloppy joes ....

-- 
rzed

"A sandwich is a sandwich, but a Manwich is a meal."


From redawgts at gmail.com  Wed Jan 24 20:33:13 2007
From: redawgts at gmail.com (redawgts)
Date: 24 Jan 2007 17:33:13 -0800
Subject: Python Windows Editors
In-Reply-To: <HUPth.66063$qO4.66057@newssvr13.news.prodigy.net>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<HUPth.66063$qO4.66057@newssvr13.news.prodigy.net>
Message-ID: <1169688793.302541.243200@s48g2000cws.googlegroups.com>

Yes, pywin32 installs PythonWin.

On Jan 24, 4:07 pm, "W. Watson" <wolf_tra... at invalid.com> wrote:
> W. Watson wrote:
> > I downloaded python-2.5.msi and installed it. I believe its editor is
> > [corrected]IDLE. I understand there's a Win editor called pythonwin. I believe it's
> > in the download pywin32-210.win32-py2.5.exe, but I'm not sure if this
> > exe file has just the editor or all of Python. Comments? If not how do I
> > get the PythonWin editor by itself?
>
> > BTW, one of the features I did not like of IDE is the limited file Print
> > command. It puts everything in 16pt type, and gives no choice over what
> > pages should be printed. Maybe there's an option?I don't see any responses that address regarding
> pywin32-210.win32-py2.5.exe, so it looks like I'll have to undbundle it and
> see for myself.



From gagsl-py at yahoo.com.ar  Sat Jan 13 21:26:21 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 13 Jan 2007 23:26:21 -0300
Subject: Boilerplate in rich comparison methods
References: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au><7x8xg71j3t.fsf@ruckus.brouhaha.com>
	<pan.2007.01.13.19.09.09.242271@REMOVE.THIS.cybersource.com.au>
Message-ID: <eoc4cg$aof$1@sea.gmane.org>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> escribi? en el 
mensaje 
news:pan.2007.01.13.19.09.09.242271 at REMOVE.THIS.cybersource.com.au...
> On Fri, 12 Jan 2007 23:28:06 -0800, Paul Rubin wrote:
>
>> If it's that uniform I think you can just use __cmp__:
>
> Good point -- I had somehow picked up the mistaken idea that __cmp__ was
> depreciated in favour of rich comparisons.

If you inherit from a base class that implements rich comparisons, you have 
to override all those methods, else your __cmp__ won't be called at all.
Sometimes it may be enough to implement __cmp__ and make all others call it.

-- 
Gabriel Genellina 





From nick at craig-wood.com  Fri Jan  5 05:30:04 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 05 Jan 2007 04:30:04 -0600
Subject: code optimization (calc PI) / New Algorithme for PI
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<slrneppql6.3v8.nick@irishsea.home.craig-wood.com>
	<We9nh.196$Je6.90@nntpserver.swip.net>
Message-ID: <slrneps93r.nc7.nick@irishsea.home.craig-wood.com>

Michael M. <michael at mustun.ch> wrote:
>  Yes, this "gmpy" sounds good for calc things like that.
>  But not available on my machine.
>  ImportError: No module named gmpy

Sorry, I should have said - you'll need to download that from

  http://gmpy.sourceforge.net/

>  Anyway, thanks for posting. This gmpy module can be very intersting.
>  But right now, the focus was, if it's possible to translate a strange C 
>  code into Python. And it is. Sure ;-)
> 
>  Maybe, someone can also translate a very simple algorithm for calc a 
>  range of PI in Python. (Available Code for C.)
>  http://crd.lbl.gov/~dhbailey/

Here are some more pi calculation methods.  You'll need the FixedPoint
class in my last posting, or you cah use gmpy mpf~s also.

_1 = FixedPoint(1)
# or
_1 = gmpy.mpf(1, bits)
# or (for testing)
_1 = 1.0

_3 = _1 * 3

def arctan(x):
    """
    Calculate arctan(x)
    
    arctan(x) = x - x**3/3 + x**5/5 - ... (-1 <= x <= 1)
    """
    total = x
    power = x
    divisor = 1
    old_delta = None
    while 1:
        power *= x
        power *= x
        power = -power
        divisor += 2
        old_total = total
        total += power / divisor
        delta = abs(total - old_total)
        if old_delta is not None and delta >= old_delta:
            break
        old_delta = delta
    return total

def pi_machin():
    return 4*(4*arctan(_1/5) - arctan(_1/239))

def pi_ferguson():
    return 4*(3*arctan(_1/4) + arctan(_1/20) + arctan(_1/1985))

def pi_hutton():
    return 4*(2*arctan(_1/3) + arctan(_1/7))

def pi_gauss():
    return 4*(12*arctan(_1/18) + 8*arctan(_1/57) - 5*arctan(_1/239))

def pi_euler():
    return 4*(5*arctan(_1/7) + 2*arctan(_3/79))


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


From dickinsm at gmail.com  Sun Jan 14 18:32:35 2007
From: dickinsm at gmail.com (dickinsm at gmail.com)
Date: 14 Jan 2007 15:32:35 -0800
Subject: Conflicting needs for __init__ method
Message-ID: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>

Here's an example of a problem that I've recently come up against for
the umpteenth time.  It's not difficult to solve, but my previous
solutions have never seemed quite right, so I'm writing to ask whether
others have encountered this problem, and if so what solutions they've
come up with.

Suppose you're writing a class "Rational" for rational numbers.  The
__init__ function of such a class has two quite different roles to
play.  First, it's supposed to allow users of the class to create
Rational instances; in this role, __init__ is quite a complex beast.
It needs to allow arguments of various types---a pair of integers, a
single integer, another Rational instance, and perhaps floats, Decimal
instances, and suitably formatted strings.  It has to validate the
input and/or make sure that suitable exceptions are raised on invalid
input.  And when initializing from a pair of integers---a numerator
and denominator---it makes sense to normalize: divide both the
numerator and denominator by their greatest common divisor and make
sure that the denominator is positive.

But __init__ also plays another role: it's going to be used by the
other Rational arithmetic methods, like __add__ and __mul__, to return
new Rational instances.  For this use, there's essentially no need for
any of the above complications: it's easy and natural to arrange that
the input to __init__ is always a valid, normalized pair of integers.
(You could include the normalization in __init__, but that's wasteful
when gcd computations are relatively expensive and some operations,
like negation or raising to a positive integer power, aren't going to
require it.)  So for this use __init__ can be as simple as:

def __init__(self, numerator, denominator):
    self.numerator = numerator
    self.denominator = denominator

So the question is: (how) do people reconcile these two quite
different needs in one function?  I have two possible solutions, but
neither seems particularly satisfactory, and I wonder whether I'm
missing an obvious third way.  The first solution is to add an
optional keyword argument "internal = False" to the __init__ routine,
and have all internal uses specify "internal = True"; then the
__init__ function can do the all the complicated stuff when internal
is False, and just the quick initialization otherwise.  But this seems
rather messy.

The other solution is to ask the users of the class not to use
Rational() to instantiate, but to use some other function
(createRational(), say) instead.  Then __init__ is just the simple
method above, and createRational does all the complicated stuff to
figure out what the numerator and denominator should be and eventually
calls Rational(numerator, denomiator) to create the instance.  But
asking users not to call Rational() seems unnatural.  Perhaps with
some metaclass magic one can ensure that "external" calls to
Rational() actually go through createRational() instead?

Of course, none of this really has anything to do with rational
numbers.  There must be many examples of classes for which internal
calls to __init__, from other methods of the same class, require
minimal argument processing, while external calls require heavier and
possibly computationally expensive processing.  What's the usual way
to solve this sort of problem?

Mark



From sndive at gmail.com  Fri Jan 26 15:50:47 2007
From: sndive at gmail.com (sndive at gmail.com)
Date: 26 Jan 2007 12:50:47 -0800
Subject: Calling python function from C and import questions
Message-ID: <1169844647.673719.25810@j27g2000cwj.googlegroups.com>

Is there a better way to make a call from C than

PyRun_SimpleString("import
foo_in_python\nfoo_in_python.bar(whatever)\n");

?

I already imported the foo_in_python using PyImport_ImportModule
and wonder why do I need to keep importing it every time I'm
calling a python function in that module.

I stepped thru PyImport_ImportModule and it seems rather expensive.

I assume the module will end up in cache after PyImport_ImportModule
so that subsequent
PyRun_SimpleString("import foo_in_python\n...
is cheaper but I still have to wonder if I what I'm doing is the right
thing or there is a much simpler way of doing this.

Does anyone know why does the import tries to load .py files before
.pyc?
Thank you.



From stefan.behnel-n05pAM at web.de  Mon Jan  8 10:15:00 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 08 Jan 2007 16:15:00 +0100
Subject: lxml namespaces problem
In-Reply-To: <1168212638.493983.202560@11g2000cwr.googlegroups.com>
References: <1168212638.493983.202560@11g2000cwr.googlegroups.com>
Message-ID: <45a25ff6$0$30319$9b4e6d93@newsspool1.arcor-online.net>

Maxim Sloyko wrote:
> I have a little problem with XML namespaces.
> In my application I have two XML processors, that process the same
> document, one after the other.  The first one looks for nodes in 'ns1'
> namespace, and substitutes them, according to some algorithm. After
> this processor is finished, it is guaranteed that there are no more
> 'ns1' nodes left in the tree. however 'ns1' namespace dclaration is
> still
> there, in the root node (well, I put it there manually). Now, when
> this namespace is no longer needed, I want to get rid of it, because
> it confuses some other processors (namely, my browser)
> 
> So, the question is, how do I do that?
> del tree.getroot().nsmap['ns1']
> does not seem to do the trick :(

Please ask this kind of questions on the lxml mailing list. You might also
want to consider searching the mail archive first.

First of all, lxml produces perfectly well-formed XML here. There is no reason
a document should not contain any unused namespace declarations. It's the
browser that's broken if it handles the namespace incorrectly.

Then: the thing is that lxml can't know that you removed all occurrences of
the respective namespace, so it can't just remove the declaration by itself.
lxml 1.2 will likely be able to handle these things a little (!) more
beautifully, but it's not there yet.

One way to get around this might be to reimplement the namespace replacement
in XSLT. You might also want to try to copy the elements to a newly created
document that does not have the original namespace declaration. Note, however,
that this is not guaranteed to work and might break depending on the lxml version.

Stefan


From howard at eegsoftware.com  Mon Jan 22 16:19:21 2007
From: howard at eegsoftware.com (Howard Lightstone)
Date: Mon, 22 Jan 2007 21:19:21 GMT
Subject: Building extensions with vc8
Message-ID: <Xns98C08781BD9E5howardeegsoftwarecom@207.115.17.102>

Has there been any progress on being able to build extensions with MSVC8 
(aka Visual Studio 2005)?

Since the "free" compiler from Microsoft is now VC8, I *assume* this will 
be the new method.....

2.5 itself rebuilds using PCbuild8, as do tkinter (but using Tcl 8.4.14 and 
Tk 8.4.14) however  none of the distutils-generated extensions will build.



From wangshuhao at sina.com  Wed Jan 24 03:14:48 2007
From: wangshuhao at sina.com (Wang Shuhao)
Date: Wed, 24 Jan 2007 16:14:48 +0800
Subject: sys.path issue in cygwin
Message-ID: <002401c73f8f$b9f7da90$14fd0179@WANGSHUHAO>



I successfully built and installed Python 2.2.3 in cygwin. But there is something wrong in the sys.path. I use following statments for a test.

>>> import sys
>>> print sys.path
['', 'C/lib/python2.2/', 'C/lib/python2.2/plat-cygwin', 'C/lib/python2.2/lib-tk'
, '\\Python24/lib/python2.2/lib-dynload']
>>>

To keep the question simple, I've set PATH= in cygwin.bat to avoid python initialze sys.path from Windows' PATH environment.

Obviously, 'C/lib/python2.2/' is a wrong path. In fact my python is installed in /usr/local/lib/python2.2.3. The result of the issue is that when you run a program python can't find the module. So what I really want to know is where these path came from and how to fix it.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070124/8ef3210b/attachment.html>

From grahn+nntp at snipabacken.dyndns.org  Mon Jan 22 09:55:29 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 22 Jan 2007 14:55:29 GMT
Subject: Is it possible to fasten the import of cgi?
References: <45af6f47$0$322$e4fe514c@news.xs4all.nl>
	<mailman.2867.1169130619.32031.python-list@python.org>
	<45af8f52$0$339$e4fe514c@news.xs4all.nl>
	<mailman.2876.1169140579.32031.python-list@python.org>
Message-ID: <slrner9f2p.tcj.grahn+nntp@frailea.sa.invalid>

On Thu, 18 Jan 2007 14:15:44 -0300, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
...
> I'll try to explain better: the cgi *protocol* (I'm not talking about the 
> cgi *module*) requires a *new* python process to be created on *each* 
> request. Try to measure the time it takes to launch Python, that is, the 
> time from when you type `python ENTER` on your shell and the interpreter 
> prompt appears.

On my Mac Mini with all of Python on local disk:

tuva:~> time python </dev/null
0.024u 0.012s 0:00.02 150.0%    0+0k 0+0io 0pf+0w
tuva:~> time python < /dev/null
0.028u 0.004s 0:00.02 100.0%    0+0k 0+0io 0pf+0w
tuva:~>

I.e. about 200--300ms. I assume startup time >> shutdown time.

If Python was at the other end of a NFS file system, much worse figures.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From paul.sijben at xs4all.nl  Wed Jan 10 09:43:23 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Wed, 10 Jan 2007 15:43:23 +0100
Subject: maximum number of threads
In-Reply-To: <mailman.2531.1168438769.32031.python-list@python.org>
References: <mailman.2531.1168438769.32031.python-list@python.org>
Message-ID: <45A4FB8B.60508@xs4all.nl>

All thanks for all the input! This was very informative.

Looks like I indeed need stackless as my code benefits from being
concurrently designed.

Paul

Jean-Paul Calderone wrote:
> On Wed, 10 Jan 2007 12:11:59 -0200, Felipe Almeida Lessa
> <felipe.lessa at gmail.com> wrote:
>> On 1/10/07, Laurent Pointal <laurent.pointal at limsi.fr> wrote:
>>> This is a system configurable limit (up to a maximum).
>>>
>>> See ulimit man pages.
>>>
>>> test
>>>
>>>         ulimit -a
>>>
>>> to see what are the current limits, and try with
>>>
>>>         ulimit -u 2000
>>>
>>> to modify the maximum number of user process (AFAIK each thread use a
>>> process entry on Linux)
>>
>> I don't think it's only this.
> 
> Indeed you are correct.  The actual limit you are hitting is the size
> of your address space.  Each thread is allocated 8MB of stack.  382
> threads consumes about 3GB of address space.  Even though most of this
> memory isn't actually allocated, the address space is still used up.  So,
> when you try to create the 383rd thread, the kernel can't find anyplace
> to put its stack.  So you can't create it.
> 
> Try reducing your stack size or reducing the number of threads you create.
> There's really actually almost no good reason to have this many threads,
> even though it's possible.
> 
>    exarkun at charm:~$ python Desktop/test.py
>    50
>    100
>    150
>    200
>    250
>    300
>    350
>    Exception raised: can't start new thread
>       Biggest number of threads: 382
>    exarkun at charm:~$ ulimit -Ss 4096
>    exarkun at charm:~$ python Desktop/test.py
>    50
>    100
>    150
>    200
>    250
>    300
>    350
>    400
>    450
>    500
>    550
>    600
>    650
>    700
>    750
>    Exception raised: can't start new thread
>       Biggest number of threads: 764
>    exarkun at charm:~$
>    Jean-Paul



From deets at nospam.web.de  Tue Jan 30 03:10:57 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 30 Jan 2007 09:10:57 +0100
Subject: Python 2.5 Tkinter not configured
In-Reply-To: <epmi580m8c@enews4.newsguy.com>
References: <epmi580m8c@enews4.newsguy.com>
Message-ID: <528ctaF1nig7eU1@mid.uni-berlin.de>

Jim schrieb:
> I compiled Python 2.5 from python.org and I get an error message when I try
> to import the Tkinter module. Python reports that there is no such module.
> It says my Python isn't configured for Tkinter. How do I configure it? I'm
> using GCC 4.1.1 to compile the tarball. Thanks for any help with this.

You need to have tcl/tk together with it's development-headers 
installed. Python _should_ figure out where things are, and then be 
configured to include tkinter.

Diez


From duncan.booth at invalid.invalid  Fri Jan 12 10:13:54 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 Jan 2007 15:13:54 GMT
Subject: Command line arguments on Vista
References: <1168613362.406648.304720@11g2000cwr.googlegroups.com>
Message-ID: <Xns98B69A42F81D3duncanbooth@127.0.0.1>

jmike at alum.mit.edu wrote:

> But on Windows Vista, when I run that command, I get
> 
>      there are 1 args
>      arg: printargs.py
> 
> What's up with that?

It sounds like the registry entry for running Python files is messed up. 
Can you go to a command line and see what the command 'ftype Python.File' 
displays? (Assuming that command lines and ftype still work on Vista)

The output should be:
Python.File="C:\Python25\python.exe" "%1" %*

but if it only says:
Python.File="C:\Python25\python.exe" "%1"

then you would get the behaviour you observed (on any version of Windows, 
not just Vista).


From agriff at tin.it  Sun Jan  7 14:40:57 2007
From: agriff at tin.it (Andrea Griffini)
Date: Sun, 07 Jan 2007 20:40:57 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <45a12cb0$0$300$426a74cc@news.free.fr>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
	<7xd55rzke9.fsf@ruckus.brouhaha.com>
	<45a0b4e3$0$19089$4fafbaef@reader4.news.tin.it>
	<45a12cb0$0$300$426a74cc@news.free.fr>
Message-ID: <45a14b57$0$4248$4fafbaef@reader1.news.tin.it>

Bruno Desthuilliers wrote:

 >> ... and on
>> the opposite I didn't expect that fighting with object
>> leaking in complex python applications was that difficult
>> (I've heard of zope applications that just gave up and
>> resorted to the "reboot every now and then" solution).
>>
> Zope is a special case here, since it relies on an object database...

Just to clarify my post... I found by being punched myself
in the nose what does it mean to have a complex python
application that suffers from object leaking; it's not
something I only read about zope programs.

But why zope applications would be a special case ?

Andrea


From bthom at cs.hmc.edu  Tue Jan  9 02:38:44 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Mon, 08 Jan 2007 23:38:44 -0800
Subject: private variables
In-Reply-To: <45A331FE.90509@gmx.net>
References: <74E534EE-D260-409D-8E91-0182BB897B94@cs.hmc.edu>
	<45A331FE.90509@gmx.net>
Message-ID: <D2F0235E-9106-411E-9122-E6030C674852@cs.hmc.edu>

I knew it was a beehive, but I had hoped someone would know which  
version they were released, so I can put the proper statement into my  
tutorial (e.g. In version <foo>, Python provided some support for  
private variables...). I've been avoiding getting stung b/c I see  
both sides and have no preference for one vs. the other.

--b

On Jan 8, 2007, at 10:11 PM, Thomas Ploch wrote:

> belinda thom schrieb:
>> Hello,
>>
>> In what version of python were private variables added?
>>
>> Thanks,
>>
>> --b
>>
>
> With this question you stepped into a bee hive. :-)
>
> Read the 'Why less emphasis on private data?' thread.
>
> But I can't tell you, when this so called 'private variables' were  
> added.
>
> Thomas
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From mail at microcorp.co.za  Wed Jan 10 05:14:08 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 10 Jan 2007 12:14:08 +0200
Subject: Is there a way to protect a piece of critical code?
Message-ID: <000b01c734a0$2f635840$03000080@hendrik>

Hi,

I would like to do the following as one atomic operation:

1) Append an item to a list
2) Set a Boolean indicator

It would be almost like getting and holding the GIL,
to prevent a thread swap out between the two operations.
- sort of the inverted function than for which the GIL
seems to be used, which looks like "let go", get control
back via return from blocking I/O, and then "re - acquire"

Is this "reversed" usage possible?
Is there some way to prevent thread swapping?

The question arises in the context of a multi threaded
environment where the list is used as a single producer,
single consumer queue - I can solve my problem in various
ways, of which this is one, and I am curious as to if it is 
possible to prevent a thread swap from inside the thread.

- Hendrik



From bdesth.quelquechose at free.quelquepart.fr  Thu Jan  4 05:57:48 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 04 Jan 2007 11:57:48 +0100
Subject: static object
In-Reply-To: <mailman.2270.1167874160.32031.python-list@python.org>
References: <459c306c$0$314$426a74cc@news.free.fr>
	<mailman.2270.1167874160.32031.python-list@python.org>
Message-ID: <459cd784$0$284$426a34cc@news.free.fr>

Ben Finney a ?crit :
(snip)
> The "Singleton" pattern does what you say here. Implementing a proper
> Singleton in Python is complicated and hard to understand.

Really ? Using __new__ and a class attribute, it doesn't seem so 
complicated - nor difficult to understand...


From s99999999s2003 at yahoo.com  Mon Jan 22 22:03:01 2007
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 22 Jan 2007 19:03:01 -0800
Subject: match nested parenthesis
Message-ID: <1169521381.814119.27020@11g2000cwr.googlegroups.com>

hi
i wish to find an reg exp for matching nested parenthesis of varying
level like
string =
"somewords1(words(somewords2)-(some(some)words3)somestuff)somestuff"
and be able to evaluate the pair starting from the inner most(the
deepest level) , ie (some)
up till the outer most. What is a good reg exp to do this? or is simple
string manipulations enough? 
thanks



From bearophileHUGS at lycos.com  Thu Jan 11 07:38:49 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 11 Jan 2007 04:38:49 -0800
Subject: Type casting a base class to a derived one?
In-Reply-To: <mailman.2571.1168518354.32031.python-list@python.org>
References: <mailman.2571.1168518354.32031.python-list@python.org>
Message-ID: <1168519129.413970.80840@p59g2000hsd.googlegroups.com>

Frederic Rentsch:
>    If I derive a class from another one because I need a few extra
> features, is there a way to promote the base class to the derived one
> without having to make copies of all attributes?
>
> class Derived (Base):
>    def __init__ (self, base_object):
>       # ( copy all attributes )
>       ...
>
> This looks expensive.

No need to copy attributes:

class Base(object):
    def __init__ (self, x):
        self.x = x

class Derived(Base):
    def __init__ (self, x, y):
        Base.__init__(self, x)
        self.y = y

d = Derived(1, 2)
print d.x, d.y

Bye,
bearophile



From rdiaz02 at gmail.com  Sat Jan 20 10:59:45 2007
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Sat, 20 Jan 2007 16:59:45 +0100
Subject: Py 2.5 on Language Shootout
In-Reply-To: <45B23400.2010906@gmx.de>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>
	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>
	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>
	<1169275613.093797.67320@v45g2000cwv.googlegroups.com>
	<45B23400.2010906@gmx.de>
Message-ID: <624934630701200759k4f4aa6fr803595fa4ada28d3@mail.gmail.com>

On 1/20/07, Carl Friedrich Bolz <cfbolz at gmx.de> wrote:
> pgarrone at acay.com.au wrote:
>  >>> Looking over the benchmarks, one gains the impression that Python is a
>  >>> slow language.
>  >> What does that even mean - a slow language?
>  >>
>  >
>  > The alioth benchmarks provide a set of numbers by which
>  > languages may be compared.
>
> Wrong. The benchmarks provide a set of numbers by which
> _implementations_ of languages can be compared. After all, it is
> possible that someone implements a magic-pixie-dust-interpreter that
> executes Python programs several orders of magnitude fastes than
> CPython. Or you could say that C is slow because if you use CINT, a C
> interpreter ( http://root.cern.ch/root/Cint.html ) to execute it, it is
> slow.


Yeah, but this is hair-splitting. Except for Jython, IronPython, and
Stackless, I think when we say "Python is slow/fast" we think CPython
(otherwise, we qualify the implementation). For that matter it is
often said "the GIL ..."; oh, but wait, Stackless ...

With other languages (e.g., Common Lisp) the separation between the
language and the implementation is key because, to begin with, there
is something external from, and independent of, any particular
implementation. That is not the case with Python.

And the example of CINT is hair-splitting to the nth power.To begin
with, I do not think CINT implements the full standard C. But even if
it were, when people think of C they rarely think of CINT.

I think readers understood the previous poster.

Best,

R.
>
> Cheers,
>
> Carl Friedrich Bolz
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Ramon Diaz-Uriarte
Statistical Computing Team
Structural Biology and Biocomputing Programme
Spanish National Cancer Centre (CNIO)
http://ligarto.org/rdiaz


From removethis.kartic.krishnamurthy at gmail.com  Mon Jan 29 13:58:09 2007
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Mon, 29 Jan 2007 18:58:09 GMT
Subject: Sourcing Python Developers
In-Reply-To: <45BE4348.9020500@gmail.com>
References: <45BE4348.9020500@gmail.com>
Message-ID: <45BE43C1.1000805@gmail.com>

Current requirements in US only.

Kartic sayeth,  on 01/29/2007 01:56 PM:
> Hello,
> 
> My company has quite a few opening involving python expertise. We are 
> always looking for python resources (and find it difficult filling these 
> positions, might I add). Is there any place to find developers' resumes 
> (like finding jobs from http://python.org/community/jobs/)? If any one 
> knows of a resume repository (other than Monster, Dice, 
> Costs-an-arm-and-leg job site) please share.
> 
> In any case, we have immediate requirements for a Pythonista with C++, 
> MySQL, XML, Debian expertise. Please email resume to: 
> python-resumes(at)temporaryforwarding.com
> 
> Thank you,
> --Kartic


From dudds at netspace.net.au  Tue Jan 23 08:01:24 2007
From: dudds at netspace.net.au (dudds)
Date: 23 Jan 2007 05:01:24 -0800
Subject: PythonCard installation
Message-ID: <1169557284.833325.305590@k78g2000cwa.googlegroups.com>

Anyone had any joy with this using FC6?? When I try to run code editor
I get the error "Traceback (most recent call last):
  File
"/usr/lib/python2.4/PythonCard-0.8.2/tools/codeEditor/codeEditor.py",
line 13, in ?
    from PythonCard import about, configuration, dialog, log, menu,
model, resource, util
ImportError: No module named PythonCard"



From theller at ctypes.org  Fri Jan 26 09:10:05 2007
From: theller at ctypes.org (Thomas Heller)
Date: Fri, 26 Jan 2007 15:10:05 +0100
Subject: how to unistall a Python package?
In-Reply-To: <epcc69$55f$1@sea.gmane.org>
References: <epad97$fhqb$1@zam602.zam.kfa-juelich.de>	<000601c74094$4d514e20$1400a8c0@mytomato>
	<epcc69$55f$1@sea.gmane.org>
Message-ID: <45BA0BBD.1030105@ctypes.org>

Colin J. Williams schrieb:
> With Windows, a few packages, eg. PythonWin, also modify the registry. 
> numpy, the elaboration of numarray/numeric, and PythonWin have 
> RemoveXXX.exe in C:\Python25.
> 
> I don't know whether this is the standard approach.  There doesn't seem 
> to be a reference to Removal in the distutils document.

Packages that are create with distutils bdist_wininst command can be removed
using the control panel->add/Software/ Add Remove programs.

This calls RemoveXXX.exe (which is undocumented on purpose).

Thomas


From rocky at panix.com  Thu Jan 25 19:09:35 2007
From: rocky at panix.com (R. Bernstein)
Date: 25 Jan 2007 19:09:35 -0500
Subject: Possible bug in Python 2.5? (Was Re: pdb in python2.5)
References: <1169717486.230356.79730@l53g2000cwa.googlegroups.com>
	<wihtzyfs17s.fsf@panix3.panix.com>
	<wihps92sysg.fsf_-_@panix3.panix.com>
	<1169760673.197226.206540@a75g2000cwd.googlegroups.com>
Message-ID: <wihlkjqsl6o.fsf@panix3.panix.com>

"Rotem" <vmalloc at gmail.com> writes:

> Hi,
> 
> I noticed that pydb.pm() also fails in python2.5 when invoked on that
> same example (seems like also trying to access a nonexistent
> attribute/variable).
> 
> Is this known to you as well/was it fixed?

Doesn't do that for me for Python 2.5 on both pydb 1.20 (last released
version) and the current CVS. See below. If you think the problem is
not on your end and want to file a bug report, please do. But note

  * comp.lang.python is not the place to file bug reports
  * more detail is needed that what's been given so far

$ cat /tmp/t1.py
from __future__ import with_statement
import threading

def f():
    l = threading.Lock()
    with l:
        print "hello"
        raise Exception("error")
        print "world"

try:
    f()
except:
   import pydb
   pydb.pm()
$ python /tmp/t1.py
hello
(/tmp/t1.py:9):  f
(Pydb) where
-> 0 f() called from file '/tmp/t1.py' at line 9
## 1 <module>() called from file '/tmp/t1.py' at line 15
(Pydb) show version
pydb version 1.20.
(Pydb) quit
$ python /tmp/t1.py 
hello
(/tmp/t1.py:15):  <module>
(Pydb) where
## 0 f() called from file '/tmp/t1.py' at line 8
-> 1 <module>() called from file '/tmp/t1.py' at line 15
(Pydb) show version
pydb version 1.21cvs.
(Pydb) quit
$ 




From cliff at develix.com  Wed Jan 24 14:49:20 2007
From: cliff at develix.com (Cliff Wells)
Date: Wed, 24 Jan 2007 11:49:20 -0800
Subject: Type casting a base class to a derived one?
In-Reply-To: <1169667478.4910.52.camel@portable-evil>
References: <mailman.2571.1168518354.32031.python-list@python.org>
	<slrneqcgve.1n0.horpner@FIAD06.norwich.edu>
	<4866bea60701110641n5eb4cc57uf5967aebcfd7790d@mail.gmail.com>
	<1169664145.4910.22.camel@portable-evil>
	<4866bea60701241057t13776d34ya516c2c24e7119bb@mail.gmail.com>
	<1169667478.4910.52.camel@portable-evil>
Message-ID: <1169668160.4910.57.camel@portable-evil>

On Wed, 2007-01-24 at 11:37 -0800, Cliff Wells wrote:

> 
> class Person: # assume this is something from the ORM
>     name = "Kenny"
> 
> class PersonRow ( Person ):
>     pass
> 
> def flatten_person ( p ):
>     return "<span>omg, you've killed %p</span>" % p.name
> 
> def flatten_personrow ( p ):
>     return "<tr><td>%s</td></tr>" % p.name
> 
> register_flattener ( PersonRow, flatten_personrow )
> register_flattener ( Person, flatten_person )
> 
> 
> Now, assuming a list of Person records were passed in as 'persons', then
> in the template the template author could simply use:
> 
> div [
>     # show the first person
>     persons [ 0 ],
> 
>     # show a table of all persons
>     table [    
>         [ PersonRow ( p ) for p in persons ]
>     ]
> ]
> 

I should add that the reason I don't want to just say, call
flatten_personrecord() directly from the template (which would be a
reasonable solution in this example) is because I have a longer-term
goal that would require an object at that point.

What I expect I'll end up doing is using a factory function that returns
the desired object at that point, but it will require a bit more
explanation at the template level than I'd like:

table [
    [ render_as ( PersonRow, p ) for p in persons ]
]

or something similar.


Regards,
Cliff



From tpawley at gmail.com  Mon Jan 15 03:52:33 2007
From: tpawley at gmail.com (Torabisu)
Date: 15 Jan 2007 00:52:33 -0800
Subject: Python web app. (advice sought)
In-Reply-To: <45aae51b.0@entanet>
References: <45aae51b.0@entanet>
Message-ID: <1168851153.618515.261800@a75g2000cwd.googlegroups.com>


Duncan Smith wrote:
> Hello,
>      I find myself in the, for me, unusual (and at the moment unique)
> position of having to write a web application.  I have quite a lot of
> existing Python code that will form part of the business logic.  This
> relies on 3rd party libraries (such as numpy) which would make porting
> to e.g. IronPython difficult (I would imagine).  I was thinking LAMP
> (the P standing for Python, of course), particularly as I was originally
> encouraged to go for open source solutions.
>
> The application will provide some basic statistical analyses of data
> contained in database tables and associated plots (R / matplotlib /
> graphviz).  There will also be some heavier duty Monte Carlo simulation
> and graphical modelling / MCMC.  The user(s) will need to be able to set
> model parameters; maybe even tinker with model structure, so it will be
> very interactive (AJAX?).
>
> I've had a look at Django, Turbogears and Plone, and at the moment I am
> torn between Turbogears and Plone.  I get the impression that Turbogears
> will require me to write more non-Python code, but maybe Plone is more
> than I need (steeper learning curve?).  Maybe Turbogears will lead to a
> more loosely coupled app. than Plone?
>
> The disconcerting thing is that others on the project (who won't be
> developing) have started to talk about a LAMP back end with an IIS front
> end, .NET, and the benefits of sharepoint.  The emphasis is supposed to
> be on rapid development, and these technologies are supposed to help.
> But I have no real familiarity with them at all; just Python, C and SQL
> to any realistic level of competence.
>
> Any advice would be greatly appreciated.  I have to do much of the
> statistical work too, so I need to make good choices (and hopefully be
> able to justify them so nobody else on the project makes inappropriate
> choices for me).  e.g. I don't mind learning Javascript if it doesn't
> take too long.  The physical server will initially be a multiprocessor
> machine with several GB of RAM.  But we also have a cluster (I have no
> details, I only started the project a week ago).  So any advice
> regarding parallelisation would also be appreciated (or, in fact, any
> useful advice / pointers at all).  Thanks.
>
> Duncan

I was in a similar boat a while back, needing to make a decision on
what to use for our web development.  I had worked with Plone
previously and found that for our needs it wasn't going to work.  Our
web development was quite specific and didn't fit ideally into the
standard content management realm.  I also looked at Django and
TurboGears, installing and working with each.  I eventually went with
Django, and I've really enjoyed working with it.  Was a personal choice
and I'm sure our development would have been as successful if I'd
chosen TurboGears.

If you want the strength of persistent layers, MVC, templating etc etc
but want to stay away from the heavier frameworks, another possibility
is http://webpy.org/.  Very simple to implement, lightweight yet still
fairly full of features.



From bdesth.quelquechose at free.quelquepart.fr  Sun Jan  7 16:42:11 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 07 Jan 2007 22:42:11 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <9dboh.11767$ZT3.426@newssvr19.news.prodigy.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
	<9dboh.11767$ZT3.426@newssvr19.news.prodigy.com>
Message-ID: <45a162f3$0$3501$426a74cc@news.free.fr>

John Nagle a ?crit :
> sturlamolden wrote:
> 
>> time.swift at gmail.com wrote:
>>
>>> Coming from a C++ / C# background, the lack of emphasis on private data
>>> seems weird to me. I've often found wrapping private data useful to
>>> prevent bugs and enforce error checking..
>>>
>>> It appears to me (perhaps wrongly) that Python prefers to leave class
>>> data public.  What is the logic behind that choice?
>>
>>
>>
>> The designers of Java, C++, C#, Ada95, Delphi, etc. seem to think that
>> if an object's 'internal' variables or states cannot be kept private,
>> programmers get an irresistible temptation to mess with them in
>> malicious ways.
> 
> 
>     If you're not clear on encapsulation issues,

encapsulation != data hiding

> you probably haven't
> done extensive maintenance programming on code written by others.

I did.

> Finding out who can mess with a variable when debugging the code of
> others is not fun.

# before
class Toto(object):
   def __init__(self, x):
     self._x = x

# after
class Toto(object):
   def __init__(self, x):
     self._x = x

   @apply
   def _x():
     def fget(self):
       return self._real_x
     def fset(self, value):
       import pdb; pdb.set_trace()
       self._real_x = value
     return property(**locals)

This is of course a braindead implementation - a better one would use 
either the inspect module of the sys._getframe() hack to retrieve useful 
debug infos (left as an excercice to the reader...)


>     Because Python doesn't have explicit declarations, scope of 
> variables is
> a touchy issue.

???

>  If you write "x = 1" within a function, that will
> create a local "x" if "x" doesn't exist, or alter a global "x" if "x" was
> previously created in the global context.

Err... May I suggest you to read these two pages:
http://docs.python.org/ref/assignment.html
http://docs.python.org/ref/global.html#l2h-563

>  But at least global variables
> are local to the namespace; we don't have clashes across files.  So
> it's not too bad.  JavaScript has the convention that newly created
> variables are global by default.  

Unless preceded by the 'var' keyword...

> Big mistake.

Mmm... which one ?

>     The underscore thing makes sense.  Single underscore
> variables are "protected" in the C++ sense, and double underscore
> variables are "private", not visible from inherited classes.
> It's hard to misuse such variables by accident.  I'd be tempted
> to prohibit access to underscore variables other than via "self._x"
> forms, so they'd be inaccessable outside the object. 

# foo.py
class Foo(object):
   def __init__(self, x):
     self._x = x
   def __repr__(self):
     return "<Foo %s>" % self._x

# bar.py
def bar(self):
   self.y = self._x

# baaz.py
from foo import Foo
from bar import bar
Foo.bar = bar

f = Foo([42])
f.bar()
f.y.append('gotcha')
print f


> It's undesirable
> from a maintenance standpoint to have an unenforced convention

If it's a convention, it doesn't have to be inforced. If it's inforced, 
it's not a convention anymore.

While we're at it, I've found it very valuable to be able to mess with 
implementation when doing maintenance on somewhat large (and somewhat 
messy) Python systems...

> like
> a lead underscore.  The maintenance programmer can't trust its meaning.
 >
>     As Python grows up, and larger systems are written in it, these
> issues become more important.

If you go that way, then you'll also want to introduce declarative 
static typing and remove all possibility to dynamically modify classes 
or add/replace attributes and/or methods on a per-instance basis. If you 
want Java, you know where to find it.


From garyjefferson123 at yahoo.com  Thu Jan 25 16:28:07 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: 25 Jan 2007 13:28:07 -0800
Subject: selective logger disable/enable
In-Reply-To: <1169708086.661248.142390@j27g2000cwj.googlegroups.com>
References: <1169190498.593059.238150@q2g2000cwa.googlegroups.com>
	<1169204564.348768.186900@38g2000cwa.googlegroups.com>
	<1169349399.938121.238430@38g2000cwa.googlegroups.com>
	<1169395276.181654.160810@a75g2000cwd.googlegroups.com>
	<1169437763.213781.163660@38g2000cwa.googlegroups.com>
	<1169442596.209314.162410@s34g2000cwa.googlegroups.com>
	<1169531341.221067.205500@11g2000cwr.googlegroups.com>
	<1169546484.370874.253890@a75g2000cwd.googlegroups.com>
	<1169708086.661248.142390@j27g2000cwj.googlegroups.com>
Message-ID: <1169760487.039284.193410@a75g2000cwd.googlegroups.com>

Gary Jefferson wrote:
> So maybe I don't have all this figured out quite as well as I thought.
> What I really want to do is set an environment variable, MYDEBUG, which
> contains a list of wildcarded logger names, such as "a.*.c a.d" (which
> becomes ['a.*.c', 'a.d'], and then selectively crank the loglevel up to
> DEBUG for those that match.
>
> In order to do that, I think I need something kind of like filters, but
> for logger name... I'm not seeing how to do this, even after playing
> with variations of test15, 18, and 21.
>
> What I do have working at the moment is passing a list of non-wildcard
> logger names, i.e., doing the wildcard expansion manually such as
> "['a.b.c', 'a.c.c', 'a.f.c', 'a.d'].  Is there anyway to automate this
> dynamically?
>
> BTW, I do understand that 'a.d' is essentially equivalent to 'a.d.*',
> but I'm dealing with a hierarchy that doesn't always tidy up like that.
>  For example, I have top.network.server.http, top.network.server.smtp,
> top.network.client.http, and top.network.client.smtp.  Obviously, if I
> only want server or client DEBUG msgs, this is easy.  And sometimes
> that's exactly what I want.  Other times, I want only smtp DEBUG msgs,
> and the hierarchy won't help me get that (unless I break it for just
> getting client or server msgs), etc.  So I would really like to figure
> out how to do 'a.*.c'.
>
> Any ideas?
>
> Thanks again,
> Gary


Okay, I think I'm back on track again: I can do regex comparisons
against the name field of the LogRecord instance handed to me by
filter().

Gary



From antonyliu2002 at yahoo.com  Fri Jan  5 11:27:32 2007
From: antonyliu2002 at yahoo.com (antonyliu2002 at yahoo.com)
Date: 5 Jan 2007 08:27:32 -0800
Subject: Undefined symbol __pure_virtual when importing MySQLdb
References: <1167977378.425615.220350@51g2000cwl.googlegroups.com>
	<mailman.2313.1167978999.32031.python-list@python.org>
	<1167980159.711978.309970@i15g2000cwa.googlegroups.com>
Message-ID: <1168014452.463696.102340@51g2000cwl.googlegroups.com>

antonyliu2002 at yahoo.com wrote:
> Fredrik Lundh wrote:
> > antonyliu2002 at yahoo.com wrote:
> >
> > > I have googled hard, and did see someone asking the same question, but
> > > haven't found a good solution to this problem.  Could anyone give me a
> > > hint?  Thanks a lot!
> >
> > googling for "undefined symbol: __pure_virtual" brings up hundreds of
> > posts on this topic, and the answer is *always* to make sure that you're
> > linking with a version of the C++ libraries that matches your compiler.
> >
> > </F>
>
> Hi, thanks.  I followed the strategy provided at the following url
>
> http://www.mail-archive.com/dbi-users at perl.org/msg27851.html
>
> by adding "-lmygcc" to the end of the librarys to link. I added it to
> the end of this line in the mysql_config script like so:
>
>    libs=" $ldflags -L$pkglibdir -lmysqlclient -lz -lcrypt -lnsl -lm
> -lmygcc "
>
> And then I recompiled the MySQL-python-1.2.1 package, but the same
> problem remains.

I tried using -lgcc as some people suggested in some forum, but it does
not resolve the problem.  It looks like many people are having this
problem, but no solution has been offered so far.  Anybody has a clue?
Thanks.



From S.Mientki-nospam at mailbox.kun.nl  Thu Jan 11 13:42:53 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Thu, 11 Jan 2007 19:42:53 +0100
Subject: globals accros modules
In-Reply-To: <45a66cea$0$289$426a34cc@news.free.fr>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>
	<mailman.2556.1168492539.32031.python-list@python.org>
	<3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>
	<45a66cea$0$289$426a34cc@news.free.fr>
Message-ID: <3137a$45a6851a$d443bb3a$24085@news.speedlinq.nl>

Bruno Desthuilliers wrote:
> stef a ?crit :
>>
>>>
>>> Change a=1 to amodule.a=1
>>> If you find yourself doing tricks with the module globals, think 
>>> about redesigning your application.
>>>
>> Of course I completely agree with you.
>>
>> But ...
>> if you're moving from MatLab to Python,
>> and want to show your collegaes,
>> with how little effort they can reuse all their existing MatLab 
>> routines in Python,
>> then the global issue is a real pain !!
>>
>> You can explain your collegaes, that
>> - the startindex of arrays changes from 1 to 0
>> - slices are upto, instead of including the final border
>> - indention is th? key
>> And tell them about all beautiful things in Python,
>> but tell them that they are going to loose all their globals ???
> 
> It's a feature. Globals are definitively a BadThing(tm).

yes, I know, but my audience will accept that only in the long term.

But maybe this idea works:

<file Ugly_MatLab_Globals.py>
global var1
global var2
</file Ugly_MatLab_Globals.py>


<all other py-files in the project>
import Ugly_MatLab_Globals

def some_function():
   import Ugly_MatLab_Globals
</all other files in the project>


(btw who owns the BadThing tm ;-)

cheers,
Stef Mientki


From ramashish.lists at gmail.com  Sun Jan 21 15:49:17 2007
From: ramashish.lists at gmail.com (Ramashish Baranwal)
Date: 21 Jan 2007 12:49:17 -0800
Subject: Accessing class variables in staticmethods.
Message-ID: <1169412557.737589.105120@a75g2000cwd.googlegroups.com>

Hi,

I want to access a static variable in a staticmethod. The variable can
be redefined by derived classes and that should be reflected in base's
staticmethod. Consider this trivial example-

class Base:
    staticvar = 'Base'

    @staticmethod
    def printname():
        # this doesn't work
        # print staticvar
        # this does work but derived classes wouldn't behave as I want
        print Base.staticvar

class Derived(Base):
    staticvar = 'Derived'

Base.printname() # should print 'Base'
Derived.printname() # should print 'Derived'

Any idea on how to go about this? Also from a staticmethod how can I
find out other attributes of the class (not objects)? Do static methods
get some classinfo via some implicit argument(s)?

Thanks in advance,
Ram



From dotancohen at gmail.com  Tue Jan  2 09:05:34 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Tue, 2 Jan 2007 16:05:34 +0200
Subject: Unsubscribing from the list
Message-ID: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>

I need to unsubscribe from this list. I've mailed
users-unsubscribe at python.org but that did not unsubscribe me. I've
also gone to the list homepage and entered my user information, but
that just sent me a message that someone had tried to resubscribe this
username. What must one do to unsubscribe from python-list?

Thanks.

Dotan Cohen

http://what-is-what.com/what_is/internet.html
http://lyricslist.com/lyrics/artist_albums/356/moore_mandy.php


From hg at nospam.org  Tue Jan 16 14:07:58 2007
From: hg at nospam.org (hg)
Date: Tue, 16 Jan 2007 20:07:58 +0100
Subject: Queue and signals
References: <tmbrh.1492$lc5.386@newsfe20.lga> <mCcrh.1493$lc5.465@newsfe20.lga>
	<mailman.2802.1168995083.32031.python-list@python.org>
Message-ID: <_xfrh.57411$kn7.45469@newsfe23.lga>

skip at pobox.com wrote:

> 
>     >> Is it legal to use Queue.put in a signal handle and Queue.get in
>     >> the main process (no thread)
> 
>     hg> PS: and if not is there a way to share data between a "main" and
>     its hg> signal in a safe way (write in signal and read in main)
> 
> The Queue module was designed to work in multithreaded contexts.  I doubt
> it
> will work as expected in a nonthreaded application.  Given that your
> application isn't multithreaded I suspect you can just modify an object
> that
> both your signal handler and the rest of the application reference.  In
> particular, there's no reason your signal handler can't be a method of an
> instance:
> 
>     import signal
>     import time
> 
>     class MyClass:
>         def __init__(self):
>             self.alarm_rang = False
>             signal.signal(signal.SIGALRM, self.ring_alarm)
>             signal.alarm(2)
> 
>         def ring_alarm(self, sig, frame):
>             self.alarm_rang = True
> 
>     obj = MyClass()
>     print obj.alarm_rang
>     time.sleep(4.0)
>     print obj.alarm_rang
> 
> Skip

Hi,

Well, so far it seems to work ...

The signal handler gets "called" by another application which in turn will
stuff info in my sys.stdin, I need then to "raw_input" the info and put it
in some type of data structure in a safe way so my main loop can then
reader/pop it.

ref: (ps: I'm trying to setup a Python high level interface for my kids to
learn the language / be interested) http://realtimebattle.sourceforge.net/

Regards,

hg




From Garrick.Peterson at zootweb.com  Mon Jan 29 11:22:36 2007
From: Garrick.Peterson at zootweb.com (Garrick.Peterson at zootweb.com)
Date: Mon, 29 Jan 2007 09:22:36 -0700
Subject: stop script w/o exiting interpreter
In-Reply-To: <wWQuh.1259$SE6.1215@trnddc03>
Message-ID: <OF823F14F7.A5DF3BFD-ON87257272.00595DE1-87257272.0059B9C0@zootweb.com>

> I want, and the script will stop executing at that line and will
> return to the interactive interpreter, as I wish.

May I recommend wrapping your main program in a function definition? Such 
as:

main():
        # Bulk of your code (use a macro to indent it faster)

if __name__ == "__main__":
        main()

Then you should be able to throw in a "return" at any point and get a 
clean break, without affecting the flow of your program. This should make 
it easier to debug as well, offering a clean entry point from the python 
interactive session, and letting you return a specific value you wish to 
check.


Garrick M. Peterson
Quality Assurance Analyst
Zoot Enterprises, Inc.
garrick.peterson at NO.zootweb.com

Copyright ? 2007 Zoot Enterprises, Inc. and its affiliates.  All rights 
reserved. This email, including any attachments, is confidential and may 
not be redistributed without permission. If you are not an intended 
recipient, you have received this message in error; please notify us 
immediately by replying to this message and deleting it from your 
computer. Thank you. 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070129/48134871/attachment.html>

From sschwarzer at sschwarzer.net  Wed Jan  3 14:02:35 2007
From: sschwarzer at sschwarzer.net (Stefan Schwarzer)
Date: Wed, 03 Jan 2007 20:02:35 +0100
Subject: code optimization (calc PI)
In-Reply-To: <XgQmh.98$9v1.124@nntpserver.swip.net>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
Message-ID: <459BFDCB.4000503@sschwarzer.net>

On 2007-01-03 16:50, mm wrote:
> More general, maybe there is a speed optimazation docu out there.

At least Alex Martellis "Python in a Nutshell" has a section on
optimization.

I presented this at the last EuroPython conference:
http://sschwarzer.com/download/optimization_europython2006.pdf

Stefan

-- 
Dr.-Ing. Stefan Schwarzer
SSchwarzer.com - Softwareentwicklung f?r Technik und Wissenschaft
http://sschwarzer.com


From bg_ie at yahoo.com  Fri Jan 19 12:34:59 2007
From: bg_ie at yahoo.com (bg_ie at yahoo.com)
Date: 19 Jan 2007 09:34:59 -0800
Subject: Why do I have to call del explicitly for com objects?
In-Reply-To: <mailman.2909.1169225322.32031.python-list@python.org>
References: <1169210578.544593.310100@v45g2000cwv.googlegroups.com>
	<mailman.2909.1169225322.32031.python-list@python.org>
Message-ID: <1169228099.386082.129590@38g2000cwa.googlegroups.com>


Gabriel Genellina skrev:

> <bg_ie at yahoo.com> escribi? en el mensaje
> news:1169210578.544593.310100 at v45g2000cwv.googlegroups.com...
>
> > I'm creating objects in my python script belonging to a COM object
> > which I dispatch using win32com.client.DispatchEx. Hence, dllhost.dll
> > is the concerned process. The problem is that the objects destructor
> > within the com object is not called if the object lives past a certain
> > number of seconds. For example, this function will not call the
> > destructor concerned with obj unless the sleep is commented out.
> >
> > def fnction:
> >  obj = comobj.createACertainObject()
> >  obj.doStuff()
> >  sleep(10)
> >  obj.doMoreStuff()
> >  #del obj
>
> I don't understand the case.
> del does not invoke a destructor, just decrements the object's reference
> count. When the rc reaches zero, the object is a candidate for GC. That is,
> "some time in the future", the GC would destroy it (unless it's part of a
> circular reference chain...)
> So, *inside* your function, there is a reference held by the local variable
> obj. It is decremented automatically when you exit the function (and obj
> gets out of scope) or if you explicitely use del.
> You can use sys.getrefcount() to see how many references an object has. (The
> output is +1 because getrefcount() has a temporary reference to the object
> too).
>
> py> x="Hello World"
> py> sys.getrefcount(x)
> 2
>
> See how many references your obj have. After calling doStuff or doMoreStuff,
> you can have more references if those functions store `self` somewhere, or
> pass it to another method that does so.
>
> > It seems to me that the GC forgets about obj after a certain amount of
> > time. I can force the destructor to be called using del obj at the end
> > of my function, but why do I have to call this explicitly?
> If del obj works at the end, exiting the function should work too. Both ways
> you decrement the rc. There is something *more* in here.
>
> --
> Gabriel Genellina

Thanks for the reply. I tried using a longer sleep before the del but
the destructor wasn't called this time. I guess del is not the issue
here what so ever. As far as I can see, the garbage collector forgets
about my object after a certain period of time. The fix i'm using now
is to use Destruct functions in my CoM object which I call explicitly.

def fnction:
  obj = comobj.createACertainObject()
  obj.doStuff()
  sleep(10)
  obj.doMoreStuff()
  obj.Destruct()

I'd still love to know what the issue is here.

Thanks,

Barry.



From write2unique at optonline.net  Fri Jan  5 06:20:42 2007
From: write2unique at optonline.net (Unique Merchandise Outlet)
Date: Fri, 05 Jan 2007 06:20:42 -0500
Subject: !MAKE MONEY USING PAYPAL- IT WORKS!
Message-ID: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAAS4sfl1FLvUKKaC2ei7cF5sKAAAAQAAAAA0AFR5Vh7U2U9T8jvERI8AEAAAAA@optonline.net>

Hello,

 

I wonder if you can help me out..I received an extrememly obnoxious e-mail
from someone who told me this is a SCAM and, not a LEGAL way to make money,
and that Paypal, even has a policy against it.

 

Every forum you read this in, where people are posting this same
opportunity, I have NOT seen anything about this being an issue.

 

Do you know anything about it.

 

Would love the help of some HONEST people that know about this.

 

Thanks,

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070105/3bac9ffc/attachment.html>

From jweida at gmail.com  Thu Jan 25 00:03:05 2007
From: jweida at gmail.com (Jerry)
Date: 24 Jan 2007 21:03:05 -0800
Subject: How can i do this in Python?
In-Reply-To: <1169699143.237710.277160@l53g2000cwa.googlegroups.com>
References: <1169699143.237710.277160@l53g2000cwa.googlegroups.com>
Message-ID: <1169701385.113924.50270@l53g2000cwa.googlegroups.com>

Well, the python interpreter has no equivalent to -n or -a in the perl
interpreter.  You'd have to implement it using an actual while loop and
because of the indention sensitivity in Python, I don't believe you can
do it on the command line.  (I may be very wrong here, but I've not
gotten it to work).

--
Jerry

On Jan 24, 10:25 pm, "NoName" <zaz... at gmail.com> wrote:
> perl -ane "print join(qq(\t), at F[0,1,20,21,2,10,12,14,11,4,5,6]).qq(\n)"
> file.txt
>
> -a autosplit mode with -n or -p (splits $_ into @F)
> -n assume "while (<>) { ... }" loop around program



From martin at v.loewis.de  Wed Jan 17 15:28:24 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 17 Jan 2007 21:28:24 +0100
Subject: XLM prolgoue
In-Reply-To: <1169054322.500863.313660@11g2000cwr.googlegroups.com>
References: <1169054322.500863.313660@11g2000cwr.googlegroups.com>
Message-ID: <45AE86E8.9020207@v.loewis.de>

fscked schrieb:
> How do I go about creating the XML prologue like I want it to be?

print "<?xml version='%s' encoding='%s'?> % (version, encoding)

Regards,
Martin


From __peter__ at web.de  Thu Jan 25 03:38:41 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 25 Jan 2007 09:38:41 +0100
Subject: logging module and doctest
References: <1169703145.393435.166020@m58g2000cwm.googlegroups.com>
Message-ID: <ep9q9p$1o2$02$1@news.t-online.com>

Gary Jefferson wrote:

> I've written a logging.filter and would like to use doctest on it
> (using a StreamHandler for stdout), but this doesn't seem possible.
> Output from the logger seems to disappear (running the doctest strings
> through the interpreter as-is yields expected results).  I assume this
> is because doctest does something with logging.  

It redirects stdout to a StringIO subclass to capture the output.

> Is there any way to make these work together?

Using the StreamHandler with something like

class WrapStdOut(object):
    def __getattr__(self, name):
        return getattr(sys.stdout, name)

instead of sys.stdout directly should work.

Peter


From oyekomova at hotmail.com  Tue Jan  9 21:28:58 2007
From: oyekomova at hotmail.com (oyekomova)
Date: 9 Jan 2007 18:28:58 -0800
Subject: Read CSV file into an array
Message-ID: <1168396138.395017.299530@o58g2000hsb.googlegroups.com>

I would like to know how to read a CSV file with a header ( n columns
of float data) into an array without the header row.



From gregtech at wp.pl  Tue Jan 16 16:49:40 2007
From: gregtech at wp.pl (Grzegorz Smith)
Date: Tue, 16 Jan 2007 22:49:40 +0100
Subject: Python and Soap protocol
Message-ID: <164s123s8zosf$.gx6o8cywx5af.dlg@40tude.net>

Hi folks
I must write webb application that will comunicate with delphi desktop
application by SOAP protocol. Can you recommend any Python Soap Libary?
I founded: SOAPpy and Zolera SOAP Infrastructure (ZSI). Any tip which is
better to use?
Thanks for any help
Gregor


From gagsl-py at yahoo.com.ar  Thu Jan 11 17:47:02 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 19:47:02 -0300
Subject: globals accros modules
In-Reply-To: <3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>
	<mailman.2556.1168492539.32031.python-list@python.org>
	<3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>
Message-ID: <7.0.1.0.0.20070111192224.057daae0@yahoo.com.ar>

At Thursday 11/1/2007 11:55, stef wrote:

>Of course I completely agree with you.
>
>But ...
>if you're moving from MatLab to Python,
>and want to show your collegaes,
>with how little effort they can reuse all their existing MatLab routines
>in Python,
>then the global issue is a real pain !!
>
>You can explain your collegaes, that
>- the startindex of arrays changes from 1 to 0
>- slices are upto, instead of including the final border
>- indention is th? key
>And tell them about all beautiful things in Python,
>but tell them that they are going to loose all their globals ???

Yes


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From greg at cosc.canterbury.ac.nz  Sun Jan 28 01:58:15 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sun, 28 Jan 2007 19:58:15 +1300
Subject: subclassing pyrex extension types in python
In-Reply-To: <1169178838.303291.291740@s34g2000cwa.googlegroups.com>
References: <1169178838.303291.291740@s34g2000cwa.googlegroups.com>
Message-ID: <45BC4987.3000807@cosc.canterbury.ac.nz>

Nitin wrote:

> I am trying to subclass an extension type in Python and add attributes
> to the new class but I keep getting errors.
> 
> cdef class Spam:
> 
>   cdef int amount
> 
>   def __new__(self):
>     self.amount = 0
> 
> I get an error "TypeError: 'name2' is an
> invalid keyword argument for this function"

Arguments to the constructor of a class are passed
to its __new__ method as well as its __init__ method,
so if you want to subclass it in Python, you need to
allow for that by defining it as

   def __new__(self, *args, **kwds):
     ...

Without that, your Python subclass would have to define
its own __new__ method which accepts the extra args
and strips them out, e.g.

   class MySpam(Spam):

     def __new__(cls, name1=None, name2=None):
       return Spam.__new__(cls)

--
Greg


From duncan.booth at invalid.invalid  Wed Jan 24 13:29:35 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 Jan 2007 18:29:35 GMT
Subject: Thoughts on using isinstance
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<mailman.3077.1169645738.32031.python-list@python.org>
	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>
	<mailman.3087.1169652310.32031.python-list@python.org>
	<1169656371.689791.216360@v33g2000cwv.googlegroups.com>
	<pan.2007.01.24.16.49.21.555688@gmx.net>
	<1169659264.605545.211000@s48g2000cws.googlegroups.com>
	<mailman.3100.1169661928.32031.python-list@python.org>
Message-ID: <Xns98C2BC1E07870duncanbooth@127.0.0.1>

Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:

> In 
> the example above, you can validate that fileobject has a write 
> attribute: getattr(fileobject, "write"). But I'd only do that if I 
> have a good reason (perhaps if the file is used after some lengthy 
> calculation,and I want to be sure that I will be able to store the
> result) 

Or even just:

   write = fileobject.write
   data = ... lengthy calculation here ...
   write(data)

There is no point using getattr when you know the name of the attribute in 
advance.


From http  Mon Jan 29 15:44:15 2007
From: http (Paul Rubin)
Date: 29 Jan 2007 12:44:15 -0800
Subject: Sourcing Python Developers
References: <45BE4348.9020500@gmail.com>
Message-ID: <7xirepimw0.fsf@ruckus.brouhaha.com>

Kartic <removethis.kartic.krishnamurthy at gmail.com> writes:
> In any case, we have immediate requirements for a Pythonista with C++,
> MySQL, XML, Debian expertise. Please email resume to:

Generally it's ok to post here to the newsgroup with Python jobs.  But
you should describe the specific openings you're trying to fill, and
their locations.  


From skip at pobox.com  Sun Jan  7 15:11:37 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 7 Jan 2007 14:11:37 -0600
Subject: strange for loop construct
In-Reply-To: <1168200211.928423.319260@38g2000cwa.googlegroups.com>
References: <1168029548.217679.251230@q40g2000cwq.googlegroups.com>
	<mailman.2347.1168030198.32031.python-list@python.org>
	<12ptf5bl21f2teb@corp.supernews.com>
	<1168193206.598957.257700@38g2000cwa.googlegroups.com>
	<mailman.2396.1168198592.32031.python-list@python.org>
	<1168200211.928423.319260@38g2000cwa.googlegroups.com>
Message-ID: <17825.21497.148898.986938@montanaro.dyndns.org>


    Gabriel> Where do you find the "What's new" for previous releases? I
    Gabriel> have to read them online.
    >> 
    >> Google for
    >> >     what's new site:python.org

Sorry, I took "I have to read them online" to mean that you needed to read
them online because (perhaps) you don't have a source distribution on your
computer.  My 2.5 source (Subversion sandbox) has 2.0 through 2.5 What's New
source in Doc/whatsnew.

Skip


From bthom at cs.hmc.edu  Fri Jan  5 00:59:13 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Thu, 04 Jan 2007 21:59:13 -0800
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1167974907.497878.61070@i15g2000cwa.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<1167974907.497878.61070@i15g2000cwa.googlegroups.com>
Message-ID: <EA6417BB-A19D-433C-A39A-587CC83909B4@cs.hmc.edu>


On Jan 4, 2007, at 9:28 PM, Carl Banks wrote:

> jeremito wrote:
>> I am writing a class that is intended to be subclassed.  What is the
>> proper way to indicate that a sub class must override a method?
>
> You can't (easily).
>
> If your subclass doesn't override a method, then you'll get a big fat
> AttributeError when someone tries to call it.  But this doesn't stop
> someone from defining a subclass that fails to override the method.
> Only when it's called will the error show up.  You can, as others have
> noted, define a method that raises NotImplementedError.  But this  
> still
> doesn't stop someone from defining a subclass that fails to override
> the method.  The error still only occurs when the method is called.
>
> There are some advantages to using NotImplementedError:
>
> 1. It documents the fact that a method needs to be overridden
> 2. It lets tools such as pylint know that this is an abstract method
> 3. It results in a more informative error message
>
> But, in the end, if someone wants to define a class that defiantly
> refuses to declare a method, you can't stop them.

This is the con of a dynamic language...


From tpawley at gmail.com  Fri Jan 12 07:50:40 2007
From: tpawley at gmail.com (Torabisu)
Date: 12 Jan 2007 04:50:40 -0800
Subject: Tools Designing large/complicated applications
In-Reply-To: <mailman.2615.1168560567.32031.python-list@python.org>
References: <mailman.2615.1168560567.32031.python-list@python.org>
Message-ID: <1168606240.143950.299770@38g2000cwa.googlegroups.com>


Carl J. Van Arsdall wrote:
> For those of you that work on larger applications but still code in
> python... do your development teams use any tools to facilitate the
> design? (i'm not asking about editors here, i'm really asking about
> software design tools)  Are these the same tools you would use to help
> engineer software in another language?
>
> Is there anyone here who is forced to use a tool to design python
> software that completely hates it?  Why do you hate it?
>
> Thanks!
>
> -carl
>
>
> --
>
> Carl J. Van Arsdall
> cvanarsdall at mvista.com
> Build and Release
> MontaVista Software

Our software architects use Enterprise Architect.  Its probably one of
the cheaper modeling and UML design applications, but loaded with
features.  They do all the use cases, analysis and design with it, then
give us the necessary flow / activity diagrams and information that we
then use to construct our python applications.  It does have a python
interface (and obviously c, c#, java, php etc etc) allowing python code
to be imported for class design etc etc.

I've played with a few open source UML based tools, but unfortunately
its not one of my strengths, I leave that up to the guys that know it
well.



From bdesth.quelquechose at free.quelquepart.fr  Wed Jan 24 16:46:20 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 24 Jan 2007 22:46:20 +0100
Subject: Static variables
In-Reply-To: <ep8gkl$g7v$3@news.in.tum.de>
References: <ep8gkl$g7v$3@news.in.tum.de>
Message-ID: <45b7ccf3$0$22783$426a74cc@news.free.fr>

Florian Lindner a ?crit :
> Hello,
> does python have static variables? I mean function-local variables that keep
> their state between invocations of the function.

Not directly. But there are ways to have similar behaviour:

1/ the mutable default argument hack:

def fun(arg, _hidden_state=[0]):
   _hidden_state[0] +=  arg
   return _hidden_static[0] * 2

2/ using OO:

class Fun(object):
   def __init__(self, static=0):
     self._state = static
   def __call__(self, arg):
     self._state += arg
     return self._state * 2

fun = Fun()


HTH


From manstey at csu.edu.au  Wed Jan 31 18:09:29 2007
From: manstey at csu.edu.au (manstey)
Date: 31 Jan 2007 15:09:29 -0800
Subject: parent-child object design question
In-Reply-To: <mailman.3341.1170234961.32031.python-list@python.org>
References: <1170136965.015119.225920@q2g2000cwa.googlegroups.com>
	<mailman.3297.1170139632.32031.python-list@python.org>
	<1170220553.843010.258260@a34g2000cwb.googlegroups.com>
	<pan.2007.01.31.07.24.21.793319@REMOVEME.cybersource.com.au>
	<mailman.3341.1170234961.32031.python-list@python.org>
Message-ID: <1170284969.902118.155570@l53g2000cwa.googlegroups.com>

Thanks for your input. Here is my next version, which works very well,
but for one problem I explain below:

class CacheProperty(object):
    def __init__(self, insCacheClass, name):
        self.Name = name
        self._bind_to_parent(insCacheClass)
        self.__parent = insCacheClass
        self.__pyValue = self.__parent.get(name)

    def _bind_to_parent(self, parent):
        setattr(parent, self.Name, self)

    def get(self):
        return self.__pyValue

    def set(self, val):
        self.__parent.set(self.Name, val)
        self.__pyValue = val # Set in wrapper's copy

    Value = property(get, set)

    def __repr__(self):
        return str(self.Value)
    def __str__(self):
        return str(self.Value)


class CacheClass(object):
    def __init__(self, obj):
        self.__data = obj

    def getOref(self):
        return self.__data
    def __repr__(self):
        return 'self.__data'
    def __str__(self):
        return str(self.__data)
    def __getattr__(self, attr):
        return getattr(self.__data, attr)

Our code works fine as follows (oref is in-memory version of Cache oo-
dbase class, and is an old-style class that comes with set and get and
run_obj_method methods):
>>> insCacheClass = CacheClass(oref)
>>> insCacheProperty = CacheProperty(insOref,'Chapter')
>>> print insOref.Chapter.Value
5
>>> print insOref.Chapter.Name
'Chapter'
>>> insOref.Chapter.Value=67
>>> print insOref.Chapter
67

However, the problem is now that I can also write:
>>> insOref.Chapter=67
but we want to disallow this, as insOref.Chapter must remain =
insProperty

We add various other instances of CacheProperty to the insOref as
well, btw.

So any idea how to prohibit this, and can the class code above be
improved? Does it matter that each instance of CacheProperty contains
self.__parent? Does it actually "contain" the parent (I realise this
is not 'parent' in usual python lingo - what would be a better term?),
or is self.__parent simply point to it somehow? I don't understand
this part of python at all!

Thanks, you are being a great help in our development.



From smusnmrNOSPAM at yahoo.com  Tue Jan  9 03:01:36 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Tue, 9 Jan 2007 09:01:36 +0100
Subject: help: code formatter?
References: <entknh$8onl$1@zam602.zam.kfa-juelich.de>
	<mailman.2417.1168270685.32031.python-list@python.org>
Message-ID: <envi59$cdmi$1@zam602.zam.kfa-juelich.de>

Thomas wrote:

> Tools\scripts\reindent.py in your Python distribution.

Thank you Thomas!

What a bucket full of toolsin \tools! I didn't know that.

siggi


"Thomas Heller" <theller at ctypes.org> schrieb im Newsbeitrag 
news:mailman.2417.1168270685.32031.python-list at python.org...
> siggi schrieb:
>> Hi all,
>>
>> as a newbie I have problems with formatting code of downloaded programs,
>> because IDLE's reformatting capabilities are limited . Incorrect
>> indentation, mixing of TAB with BLANKs or eol are often very nasty to
>> correct.
>> Is there a simple code formatter that first removes all indentations and
>> then refomats correctly?
>>
>> Please help!
>
>
> Tools\scripts\reindent.py in your Python distribution.
>
> Thomas 




From eurleif at ecritters.biz  Mon Jan 15 11:28:06 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Mon, 15 Jan 2007 11:28:06 -0500
Subject: __getattr__ equivalent for a module
In-Reply-To: <eog94u$jd4$1@news.lucky.net>
References: <eog94u$jd4$1@news.lucky.net>
Message-ID: <45abab5e$0$15166$4d3efbfe@news.sover.net>

Maksim Kasimov wrote:
> so my question is: how to tune up a module get default attribute if we 
> try to get access to not actually exists attribute of a module?

You could wrap it in an object, but that's a bit of a hack.

import sys

class Foo(object):
     def __init__(self, wrapped):
         self.wrapped = wrapped

     def __getattr__(self, name):
         try:
             return getattr(self.wrapped, name)
         except AttributeError:
             return 'default'

sys.modules[__name__] = Foo(sys.modules[__name__])


From michael at mustun.ch  Wed Jan  3 10:36:18 2007
From: michael at mustun.ch (mm)
Date: Wed, 03 Jan 2007 16:36:18 +0100
Subject: C/C++, Perl, etc. to Python converter
Message-ID: <G3Qmh.94$9v1.124@nntpserver.swip.net>


Is there a Perl to Python converter?
Or in general: a XY to Python converter?

Is see, that Python is much better then Perl anyway.
But for beginners, they whant to konw how is this done with Python etc.

Sure, there are some docus out there in the internet. But a converter?


From oliver at obeattie.com  Fri Jan  5 10:15:44 2007
From: oliver at obeattie.com (oliver at obeattie.com)
Date: 5 Jan 2007 07:15:44 -0800
Subject: Encoding / decoding strings
In-Reply-To: <1167999295.242042.79470@s34g2000cwa.googlegroups.com>
References: <1167999295.242042.79470@s34g2000cwa.googlegroups.com>
Message-ID: <1168010144.000928.131920@42g2000cwt.googlegroups.com>

Basically, I want to encode an email address so that it looks something
like 8d2e23c0a835598510c88a758c6b215a - this way the user does not know
the email address they are looking at. They are public-facing views and
they are to get info about other users, therefore anonymity is
important.

Any suggestions?



From robert.kern at gmail.com  Wed Jan 24 16:35:30 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 24 Jan 2007 15:35:30 -0600
Subject: Simple Matrix class
In-Reply-To: <7xodooi16j.fsf@ruckus.brouhaha.com>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>	<mailman.3049.1169600368.32031.python-list@python.org>	<1169602411.917985.89840@l53g2000cwa.googlegroups.com>	<mailman.3051.1169604934.32031.python-list@python.org>	<1169617221.481444.135820@v45g2000cwv.googlegroups.com>	<mailman.3094.1169659321.32031.python-list@python.org>	<1169664540.120687.211350@s48g2000cws.googlegroups.com>	<mailman.3108.1169668074.32031.python-list@python.org>	<1169670271.547292.141110@l53g2000cwa.googlegroups.com>
	<7xodooi16j.fsf@ruckus.brouhaha.com>
Message-ID: <ep8jf3$5tv$1@sea.gmane.org>

Paul Rubin wrote:

> You might look at the Numerical Recipes books for clear descriptions
> of how to do this stuff in the real world.  Maybe the experts here
> will jump on me for recommending those books since I think the serious
> numerics crowd scoffs at them (they were written by scientists rather
> than numerical analysts) but at least from my uneducated perspective,
> I found them very readable and well-motivated.

As a scientist (well, former scientist) and programmer, I scoff at them for
their code. The text itself is decent if you need a book that covers a lot of
ground. For any one area, though, there are usually better books. _Matrix
Computations_, which I mentioned elsewhere, is difficult to beat for this area.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From me at rpatterson.net  Mon Jan 15 18:42:40 2007
From: me at rpatterson.net (Ross Patterson)
Date: Mon, 15 Jan 2007 15:42:40 -0800
Subject: Cygwin Python/PIL TCL/TK fork rebase solution
Message-ID: <87ejpvluvj.fsf@superfluity.lefae.org>

I recently was forced to build PIL under Cygwin Python 2.4.3 and ran
into the Cygwin fork/rebase issue with TCL/TK yet again.
Unfortunately, none of the rebase workarounds I found through my
copious STFWing worked this time.

Through trial and error I found that the following worked:

rebase -b 0x1000000000 /bin/tk84.dll

I post this here mostly for documenatation so that others can find a
more current solution than what's already available through STFWing.

But I'm also curious about rebase and to understand more about how one
chooses what base address and offset to use.  In my trial and error I
found that the default base address of 0x70000000 didn't work, nor did
the value of 0x68000000 I found through my STFWing.  I found the value
of 0x1000000000 by incrementing from 0x10000000 to 0x20000000 to
0x30000000 and so on until I found one that worked.

So if anyone wants to explain to me how to choose base address and
offset values, that would be cool.

Ross



From smusnmrNOSPAM at yahoo.com  Sat Jan  6 14:00:24 2007
From: smusnmrNOSPAM at yahoo.com (Siggi)
Date: Sat, 6 Jan 2007 20:00:24 +0100
Subject: Python and SDK5.1 are just terrific!!!
References: <enln3h$6sc$1@zam602.zam.kfa-juelich.de>
	<mailman.2330.1168015570.32031.python-list@python.org>
	<enm6ip$9b5$1@zam602.zam.kfa-juelich.de>
	<0Kynh.432$sE.358@read3.inet.fi>
Message-ID: <enorgd$3ce5$1@zam602.zam.kfa-juelich.de>

Thanks, Jussi, for your post, but I found that PythonWin's SDK5.0 option 
works well with MS SDk5.1.
Just had an Email read for me using a small Python program: correct English, 
even the date such as 12/06/06 was correctly transformed into the names of 
the month and year. Python is great1

Siggi


"Jussi Salmela" <tiedon_jano at hotmail.com> schrieb im Newsbeitrag 
news:0Kynh.432$sE.358 at read3.inet.fi...
> Siggi kirjoitti:
>> Gabriel Genellina wrote:
>>
>>> After you download and install version 5.1, it should appear on the 
>>> list.
>>
>> It should, but it does not! Shutting down and starting the WinXP Home 
>> system anew did not help.
>> The SDK 5.1 installation went smoothly, however. What can I do to find 
>> out
>> what is wrong?
>>
>> siggi
>>
>
>
> (Sorry for the long post!)
>
>
> Unfortunately I can't comment on this 5.0/5.1 issue but if you look at 
> page
> http://www.cs.unc.edu/~parente/tech/tr02.shtml
> you'll find the pyTTS system. I've used it and everything works.
>
> The funny thing is that the page has a link named "Microsoft SAPI 5.1 
> redistributable" which links to
> http://www.cs.unc.edu/Research/assist/packages/SAPI5SpeechInstaller.msi
> ie. a SAPI 5 installer. So I'm starting to wonder if it matters at all 
> whether the speech kit is a version 5 or 5.1.
>
> Anyway: pyTTS works with Python 2.4 as advertized in the accompanying 
> examples. I've used it to resolve the following dilemma: how to guarantee 
> that I'm aware of new mail appearing on my ISP.
>
> I had an unfortunate experience where a guy I was working with sent me (to 
> my home) mail that I didn't expect to receive just at the moment and to 
> which I would have liked to react immediately. Why I didn't notice the 
> mail coming: I was outside my house pumping more air to my wife's bicycle 
> tires! The mail notification was shown and erased and one more icon among 
> the more than dozen icons on my Windows System Tray didn't account for 
> much.
>
> So I figured out that a voice to remind me would be nice. I have a low 
> rate inbox, usually only a maximum of hald a dozen messages per day so I 
> wouldn't have to listen the voice all day long. So the voice keeps 
> repeating that I have new mail at my ISP until I download the mail and 
> otherwise keeps quiet. So here is my program and a skeleton of the INI 
> file it uses. The program is not finished (I have a few ideas still) but 
> it runs all day long on my computer keeping me happy.
>
> ==========================
> New Email Notifier.py
> ==========================
> #!/usr/bin/python
>
> '''
>     License: MIT License. See License.txt. If that file is not attached,
>     the license is http://www.opensource.org/licenses/mit-license.php, 
> where
>     <year> = 2006 and <copyright holders> = Jussi Salmela, Turku, Finland
> '''
>
> # This program checks for new email at ISP and notifies if new email is 
> found
>
> import win32serviceutil
> import win32service
> import win32event
> import pyTTS, sys, os, poplib, logging, time
> import ConfigParser,pywintypes
>
> print '\nThis is the New Mail Notifier window\n'
> notifierDirectory = r'C:\Python\OMAT___PROJEKTIT\New Email Notifier 
> Service'
> logging.basicConfig(level=logging.DEBUG,
>                     format='%(asctime)s %(levelname)-8s %(message)s',
>                     filename=notifierDirectory+r'\error.log')
> logging.info('=========================================================')
> logging.info('New Email Notifier Service started')
> config = ConfigParser.ConfigParser()
> config.readfp(open(notifierDirectory+r'\New Email Notifier.INI'))
> POP3Server = config.get('POP3','server')
> POP3Account = config.get('POP3','account')
> POP3Password = config.get('POP3','password')
> totalMessagesFormat = config.get('messages','total_message')
> newMessagesFormat = config.get('messages','new_message')
> wakeupMessageFormat = config.get('messages','wakeup_message')
>
> tts = pyTTS.Create()
> #set the speech volume percentage (0-100%)
> tts.Volume = 100
> #explicitly set a voice
> tts.SetVoiceByName(u'MSMary')
>
> uidDict = {}
> # We wait to be stopped and check for new email every maxTimeToWait 
> seconds
> maxTimeToWait = 1 # First check after 1 second
> while True:
>     time.sleep(maxTimeToWait)
>     maxTimeToWait = 60 # Rest of the checks after 60 second
>     try:
>         # Connect to the ISP
>         a = poplib.POP3(POP3Server,110)
>         answer = a.getwelcome()
>         if answer[0:3] != '+OK':
>             raise ValueError,'a.getwelcome returned: ' + answer
>         answer = a.user(POP3Account)
>         if answer[0:3] != '+OK':
>             raise ValueError,'a.user returned: ' + answer
>         if answer[4:] == 'Password required':
>             answer = a.pass_(POP3Password)
>             if answer[0:3] != '+OK':
>                 raise ValueError,'a.pass_ returned: ' + answer
>         answer = a.uidl()
>         if answer[0][0:3] != '+OK':
>             raise ValueError,'a.uidl returned: ' + repr(answer)
>         a.quit()
>         # Connection closed. Start handling the unique message identifiers
>         #logging.info('Connection succesfully opened, used and closed!')
>         print 'answer', answer, time.asctime()
>         uidList = [e.split()[1] for e in answer[1]]
>         print 'uidList', uidList
>         totalMessages = len(uidList)
>         uidDictNew = {}
>         for e in uidList: uidDictNew[e] = True
>         uidList = [e for e in uidList if e not in uidDict]
>         uidDict = uidDictNew
>         if totalMessages:
>             tts.Speak(totalMessagesFormat % totalMessages)
>         newMessages = len(uidList)
>         if newMessages:
>             tts.Speak(newMessagesFormat % newMessages)
>     except Exception,inst:
>         errorMsg = 'Unexpected error: %s' % sys.exc_info()[0]
>         logging.error(errorMsg)
>         logging.error(inst)
>         try:
>             tts.Speak(wakeupMessageFormat)
>             tts.Speak('I repeat: ' + wakeupMessageFormat)
>             tts.Speak(errorMsg)
>             tts.Speak(inst)
>         except pywintypes.com_error,inst:
>             errorMsg = 'Unexpected error: %s' % sys.exc_info()[0]
>             logging.error(errorMsg)
>             logging.error(inst)
>
> ==========================
> New Email Notifier.INI
> ==========================
> [POP3]
> server: myPOPserver
> account: myAcoount
> password: myPassword
> [messages]
> total_message: Your eemail server has. a total of %d messages. for you to 
> download
> new_message: The number of new messages. since the last check. is %d
> wakeup_message: Wake up, Youssi! This is your new eemail notifier, 
> reporting the following error!
>
> HTH,
> Jussi 




From bearophileHUGS at lycos.com  Sat Jan 13 19:43:46 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 13 Jan 2007 16:43:46 -0800
Subject: Comparing a matrix (list[][]) ?
In-Reply-To: <eobrm4$p68$1@cernne03.cern.ch>
References: <1168730648.038901.187460@v45g2000cwv.googlegroups.com>
	<eobrm4$p68$1@cernne03.cern.ch>
Message-ID: <1168735426.313475.212710@11g2000cwr.googlegroups.com>

Roberto Bonvallet:
> What output are you expecting from your example matrix?  If you are expecting
> it to be 5 (the smallest positive element), using "min" is the way to do it:
>     >>> matrix = [[9,  8, 12, 15],
>     ...           [0, 11, 15, 18],
>     ...           [0,  0, 10, 13],
>     ...           [0,  0,  0,  5]]
>     >>> min(min(x for x in row if x > 0) for row in matrix)
>     5

This looks a bit like homework...
To find the minimal number > 0 of the matrix this seems better:

mat = [[9, 8,  12, 15],
       [0, 11, 15, 18],
       [0,  0, 10, 13],
       [0,  0,  0,  5]]

print min(el for row in mat for el in row if el > 0)

Note that this raises TypeError is the matrix doesn't have one or more
numbers > 0
If the OP needs the position he/she can do something like:

nozeromin = 1e300 # or something similar
pos = None, None

for nrow, row in enumerate(mat):
    for ncol, el in enumerate(row):
        if el > 0 and el < nozeromin:
            nozeromin = el
            pos = nrow, ncol

print nozeromin, pos

Bye,
bearophile



From gagsl-py at yahoo.com.ar  Sat Jan 27 13:21:12 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 27 Jan 2007 15:21:12 -0300
Subject: IP address of webserver
References: <1169918690.690636.42690@a75g2000cwd.googlegroups.com>
Message-ID: <epg6ur$149$1@sea.gmane.org>

"Johny" <python at hope.cz> escribi? en el mensaje 
news:1169918690.690636.42690 at a75g2000cwd.googlegroups.com...

> How can I find server's IP address?
>>From console I can use ping, for example:
>
> C:\RobotP\cgi-bin>ping www.google.com
> Pinging www.google.com [209.85.129.147] with 32 bytes of data:
> [...]
> But how can I find it directly from Python script?

py> import socket
py> help(socket.gethostbyname)
Help on built-in function gethostbyname in module _socket:

gethostbyname(...)
    gethostbyname(host) -> address

    Return the IP address (a string of the form '255.255.255.255') for a 
host.

py> socket.gethostbyname("www.google.com")
'209.85.165.147'

-- 
Gabriel Genellina 




From sturlamolden at yahoo.no  Wed Jan 10 15:43:42 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 10 Jan 2007 12:43:42 -0800
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
In-Reply-To: <1168458486.538863.316130@k58g2000hse.googlegroups.com>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
Message-ID: <1168461822.591030.74360@i56g2000hsf.googlegroups.com>


oyekomova wrote:
> Thanks for your help. I compared the following code in NumPy with the
> csvread in Matlab for a very large csv file. Matlab read the file in
> 577 seconds. On the other hand, this code below kept running for over 2
> hours. Can this program be made more efficient? FYI - The csv file was
> a simple 6 column file with a header row and more than a million
> records.
>
>
> import csv
> from numpy import array
> import time
> t1=time.clock()
> file_to_read = file('somename.csv','r')
> read_from = csv.reader(file_to_read)
> read_from.next()

> datalist = [ map(float, row[:]) for row in read_from ]

I'm willing to bet that this is your problem. Python lists are arrays
under the hood!

Try something like this instead:


# read the whole file in one chunk
lines = file_to_read.readlines()
# count the number of columns
n = 1
for c in lines[1]:
   if c == ',': n += 1
# count the number of rows
m = len(lines[1:])
#allocate
data = empty((m,n),dtype=float)
# create csv reader, skip header
reader = csv.reader(lines[1:])
# read
for i in arange(0,m):
   data[i,:] = map(float,reader.next())

And if this is too slow, you may consider vectorizing the last loop:

data = empty((m,n),dtype=float)
newstr = ",".join(lines[1:])
flatdata = data.reshape((n*m)) # flatdata is a view of data, not a copy
reader = csv.reader([newstr])
flatdata[:] = map(float,reader.next())

I hope this helps!








> Robert Kern wrote:
> > oyekomova wrote:
> > > I would like to know how to convert a csv file with a header row into a
> > > floating point array without the header row.
> >
> > Use the standard library module csv. Something like the following is a cheap and
> > cheerful solution:
> >
> >
> > import csv
> > import numpy
> >
> > def float_array_from_csv(filename, skip_header=True):
> >     f = open(filename)
> >     try:
> >         reader = csv.reader(f)
> >         floats = []
> >         if skip_header:
> >             reader.next()
> >         for row in reader:
> >             floats.append(map(float, row))
> >     finally:
> >         f.close()
> >
> >     return numpy.array(floats)
> >
> > --
> > Robert Kern
> >
> > "I have come to believe that the whole world is an enigma, a harmless enigma
> >  that is made terrible by our own mad attempt to interpret it as though it had
> >  an underlying truth."
> >   -- Umberto Eco



From robert.kern at gmail.com  Sun Jan 21 18:25:21 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 21 Jan 2007 17:25:21 -0600
Subject: Reading Fortran Data
In-Reply-To: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
References: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
Message-ID: <ep0spc$hl4$2@sea.gmane.org>

Tyler wrote:
> Hello All:
> 
> After trying to find an open source alternative to Matlab (or IDL), I
> am currently getting acquainted with Python and, in particular SciPy,
> NumPy, and Matplotlib. While I await the delivery of Travis Oliphant's
> NumPy manual, I have a quick question (hopefully) regarding how to read
> in Fortran written data.
> 
> The data files are not binary, but ASCII text files with no formatting
> and mixed data types (strings, integers, floats). For example, I have
> the following write statements in my Fortran code:

Konrad Hinsen has a module for reading this kind of file.

  http://dirac.cnrs-orleans.fr/ScientificPython/

Specifically, Scientific.IO.FortranFormat .

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From tubby at bandaheart.com  Thu Jan 18 23:44:29 2007
From: tubby at bandaheart.com (tubby)
Date: Thu, 18 Jan 2007 23:44:29 -0500
Subject: Determining when a file is an Open Office Document
In-Reply-To: <1169171820.851021.49200@l53g2000cwa.googlegroups.com>
References: <eop5ci$et5$1@solaris.cc.vt.edu>
	<1169171820.851021.49200@l53g2000cwa.googlegroups.com>
Message-ID: <eopicc$95t$1@solaris.cc.vt.edu>

Ross Ridge wrote:
> tubby wrote:
>> Silly question, but here goes... what's a good way to determine when a
>> file is an Open Office document? I could look at the file extension, but
>> it seems there would be a better way. VI shows this info in the files:
>>
>> mimetypeapplication/vnd.oasis.opendocument.textPK
> 
> It's a ZIP archive. 

Thanks, I used this approach:

import zipfile
if zipfile.is_zipfile(filename):
    ...

Now, If only I could something like that on PDF files :)


From Barry.Carroll at psc.com  Mon Jan  8 19:07:58 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Mon, 8 Jan 2007 16:07:58 -0800
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A6A@eugsrv400.psc.pscnet.com>



John:

<<<snip>>
> 
> Hi Barry,
> 
> Please always reply on-list if the communication is non-private -- and
> meaningful :-)

Right. I noticed I hadn't "replied-to-all", so I resent the post to the
mailing list.  Slip of the mouse, no disrespect intended to the list ;^)

> 
> I don't know; here are some things you could check out:
> 
> (1) Windows XP versus *x: The limit on open file handles is 512 in
> Windows XP; write yourself a reference-preserving [hint: append to a
> list] multiple file opener on *x and see how many you get open. I have
> vague recollections of the number 1024 being mentioned.

By rough calculation, we had been through over 500 table invocations
when the error message started showing up.  That fits well enough with
the number of Windows file handles.  I'll check the Linux value.
> 
> (2) Python 2.4 versus 2.5: Read the "what's new" doc, fire up your
> googler, ...

I read through the 2.5 release notes and didn't see anything that looked
related.  I may have been looking for the wrong thing.  I'll check
again.  

> IMHO, the attitude should be to program defensively so that you need
> neither to know nor care about such implementation-specific concerns.
> Operating systems these days give you enough file handles to do any
> reasonable job. It's many moons since MS-DOS 2.n with its max 20 open
> file handles made folks implement LRU caches for file handles.
> 
> Simple rules about unwanted objects include:
> (1) If an object has a free() or close() method, then call it!
> (2) Unbind *all* references to the object.

I tend to agree with you.  I am not the lead programmer on this project,
however, so my preferences do not always get implemented.  This time,
though, as I said, the explicit file close has been retained.  

> Have you checked out my point 2 (holding multiple references to your
> Parser objects)?

Not yet, but I will.  

> 
> Cheers,
> John

Again, thanks.  

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed




From ironfroggy at gmail.com  Mon Jan 15 21:38:42 2007
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Mon, 15 Jan 2007 21:38:42 -0500
Subject: assert versus print [was Re: The curious behavior of integer
	objects]
In-Reply-To: <pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
	<mailman.2744.1168901460.32031.python-list@python.org>
	<pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>
Message-ID: <76fd5acf0701151838l1a724be5n3f1e1fda629d1464@mail.gmail.com>

On 1/15/07, Steven D'Aprano <steve at removeme.cybersource.com.au> wrote:
> On Mon, 15 Jan 2007 17:50:56 -0500, Calvin Spealman wrote:
>
> > assert foo(0x10) == 0  # Assertions are much better tests than prints :-)
>
> I dispute that assertion (pun intended).

Hah!

> Firstly, print statements work even if you pass the -O (optimize) flag
> to Python. Your asserts don't.

This is true, but the concept can be adapted to a things like an
assert_() function.

> Secondly, a bare assertion like that gives you very little information: it
> just tells you that it failed:
>
> >>> x = 1
> >>> assert x == 0
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AssertionError
>
> To provide the same information that print provides, you need something
> like this:
>
> assert x == 0, "x == %s not 0" % x

What information would I need to know if my test passed? Nothing, I
say. I only want to know when the tests fail, especially as I add more
of them. Having no output is a great way to know nothing puked.

> Thirdly, and most importantly, assert and print aren't alternatives,
> but complementary tools. Assertions are good for automated testing and
> simple data validation, where you already know what values you should
> have. Printing is good for interactively exploring your data when you're
> uncertain about the values you might get: sometimes it is hard to know
> what you should be asserting until you've seen what results your function
> returns.

True, but I intended my statement as a nudge towards more proper
testing. Even when testing things out, I often use an assert rather
than a print, to verify some condition.

> --
> Steven D'Aprano
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From exarkun at divmod.com  Sun Jan 14 19:47:23 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sun, 14 Jan 2007 19:47:23 -0500
Subject: python - process id
In-Reply-To: <109f01c7383d$45666f10$0301a8c0@tmesa.com>
Message-ID: <20070115004723.11447.1419711265.divmod.quotient.16857@ohm>

On Sun, 14 Jan 2007 16:36:58 -0800, bruce <bedouglas at earthlink.net> wrote:
>hi...
>
>is there a way to have a test python app, get its' own processID. i'm
>creating a test python script under linux, and was wondering if this is
>possible..

See the os module, the getpid function.

>
>also, i've tried using an irc client to join the irc #python channel, and
>for some reason i keep getting the err msg saying that the 'address is
>banned' i've never been to the python channel, but i'm using dsl, so i'm
>getting a dynamic address.. and yeah, i've tried changing the address a
>number of times..

IRC bans can cover a wide range of addresses.  Someone else on your ISP may
have abused the channel badly enough to get a large range of addresses, maybe
every address you could possibly get, banned from the channel.

Jean-Paul


From __peter__ at web.de  Wed Jan  3 12:14:42 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 03 Jan 2007 18:14:42 +0100
Subject: type classobj not defined?
References: <mailman.2246.1167843463.32031.python-list@python.org>
Message-ID: <engo73$apg$01$1@news.t-online.com>

Wesley Brooks wrote:

> Dear Users,
> 
> I'm in the process of adding assert statements to a large piece of
> code to aid with bug hunting and came across the following issue;
> 
> Using python in a terminal window you can do the following:
> 
>>type(False) == bool
> True
> 
> I would like to check that an object is a class, here's an example:
> 
>>class b:
> ....def __init__(self):
> ........self.c = 1
> ....def d(self):
> ........print self.c
> 
>>type(b)
> <type 'classobj'>
> 
> But the following fails:
> 
>>type(b) == classobj
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'classobj' is not defined
> 
> For the time being I'll use b.__name__ == b to ensure I'm getting the
> right class. Is there a reason why the other types such as bool are
> defined but classobj isn't?

No idea. You can easily define it yourself, though:

>>> class Classic: pass
...
>>> classobj = type(Classic)
>>> isinstance(Classic, classobj)
True

Note that "newstyle" classes (those deriving from object) are of type
'type', not 'classobj':

>>> class Newstyle(object): pass
...
>>> isinstance(Newstyle, classobj)
False
>>> isinstance(Newstyle, (classobj, type))
True

The inspect module wraps the functionality in a function:

>>> import inspect
>>> inspect.isclass(Newstyle)
True
>>> inspect.isclass(Classic)
True

Peter


From jhefferon at smcvt.edu  Tue Jan 30 07:34:24 2007
From: jhefferon at smcvt.edu (Jim)
Date: 30 Jan 2007 04:34:24 -0800
Subject: error messages containing unicode
In-Reply-To: <pan.2007.01.30.02.48.10.853852@REMOVEME.cybersource.com.au>
References: <1170122515.980168.150960@p10g2000cwp.googlegroups.com>
	<pan.2007.01.30.02.48.10.853852@REMOVEME.cybersource.com.au>
Message-ID: <1170160464.576122.62230@h3g2000cwc.googlegroups.com>

Thank you for the reply.  It happens that, as I understand it, none of 
the options that you mentioned is a solution for my situation.

On Jan 29, 9:48 pm, Steven D'Aprano <s... at REMOVEME.cybersource.com.au> 
wrote:
> The easiest ways to fix that are:
>
> (1) subclass an exception that already knows about Unicode;
But I often raise one of Python's built-in errors.  And also, is it 
really true that subclassing one of Python's built-ins give me 
something that is unicode deficient?  I assumed that I had missed 
something (because that's happened so many times before :-) ).

For instance, I write a lot of CGI and I want to wrap everything in a 
try .. except.
  try:
      main()
  except Exception, err:
      print "Terrible blunder: ",str(err)
so that the err can be one of my exceptions, or can be one that came 
with Python. (And, that I can see, err.args can be either the relevant 
string or a tuple containing the relevant string and the documentation 
is silent on whether in the built-in exceptions if err.args is a tuple 
then the string is guaranteed to be first in the tuple.)

> (2) convert the file name to ASCII before you store it; or
I need the non-ascii information, though, which is why I included it 
in the error message.

> (3) add a __str__ method to your exception that is Unicode aware.
I have two difficulties with this: (1) as above I often raise Python's 
built-in exceptions and for those __str__() is what it is, and (2) 
this goes against the meaning of __str__() that I find in the 
documentation in ref/customization.html which says that the return 
value must be a string object.  Obviously no one will come to my house 
and slap me if I violate that, but I'll venture that it would be odd 
if the best practice were to be to do the opposite of  the 
documentation.

> I'm going to be lazy and do a real simple-minded version of (2):
>
> >>> class MyBetterException(Exception):...     def __init__(self, arg):
> ...             self.args = arg.encode('ascii', 'replace')
> ...             self.unicode_arg = arg  # save the original in case
This is illuminating.  How do you know that for exceptions __init__() 
should take one non-self argument?  I missed finding this information.

Thanks again,
Jim



From cfbolz at gmx.de  Sat Jan 20 10:23:44 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Sat, 20 Jan 2007 16:23:44 +0100
Subject: Py 2.5 on Language Shootout
In-Reply-To: <1169275613.093797.67320@v45g2000cwv.googlegroups.com>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>
	<1169275613.093797.67320@v45g2000cwv.googlegroups.com>
Message-ID: <45B23400.2010906@gmx.de>

pgarrone at acay.com.au wrote:
 >>> Looking over the benchmarks, one gains the impression that Python is a
 >>> slow language.
 >> What does that even mean - a slow language?
 >>
 >
 > The alioth benchmarks provide a set of numbers by which
 > languages may be compared.

Wrong. The benchmarks provide a set of numbers by which
_implementations_ of languages can be compared. After all, it is
possible that someone implements a magic-pixie-dust-interpreter that
executes Python programs several orders of magnitude fastes than
CPython. Or you could say that C is slow because if you use CINT, a C
interpreter ( http://root.cern.ch/root/Cint.html ) to execute it, it is
slow.

Cheers,

Carl Friedrich Bolz



From gandalf at designaproduct.biz  Fri Jan  5 11:16:08 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Fri, 05 Jan 2007 17:16:08 +0100
Subject: find a .py path
In-Reply-To: <nKunh.45586$gl2.35454@newsfe16.lga>
References: <nKunh.45586$gl2.35454@newsfe16.lga>
Message-ID: <459E79C8.5070601@designaproduct.biz>

hg i'rta:
> Hi,
>
> Is there an easy way for a script being executed (from anywhere) to know
> where is is ... something in os.path ?
>   
__file__

You can also use os.argv[0] but that is not the same...

Laszlo


From jura.grozni at gmail.com  Tue Jan 16 14:25:33 2007
From: jura.grozni at gmail.com (azrael)
Date: 16 Jan 2007 11:25:33 -0800
Subject: How can I create a linked list in Python?
In-Reply-To: <mailman.2791.1168975031.32031.python-list@python.org>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
Message-ID: <1168975533.142147.124370@51g2000cwl.googlegroups.com>

How can I implement a linked list like the implementations in c with
struct-s and arrays (or pointers).
to simbolize the working principe



Gary Herron je napisao/la:
> Dongsheng Ruan wrote:
> > with a cell class like this:
> >
> > #!/usr/bin/python
> >
> > import sys
> >
> > class Cell:
> >
> >  def __init__( self, data, next=None ):
> >   self.data = data
> >   self.next = next
> >
> >  def __str__( self ):
> >   return str( self.data )
> >
> >  def echo( self ):
> >   print self.__str__()
> >
> If you really want a list (as Python defines a list - with all the methods) then you should use Python's lists.  They are quite efficient and convenient:
>
> l = [Cell(1), Cell(2), Cell(3)]
>
> However, if what you want is each cell to refer to a next cell (which after all is what a linked list does), then you already have it with the next attribute.  (In other languages you might implement 'next' as a pointer, while in Python we call it a reference -- but it amounts to the same thing.)  Create it this way:
>
> c = Cell(3)
> b = Cell(2, c)
> a = Cell(1, b)
>
> or
>
> a = Cell(1, Cell(2, Cell(3)))
>
> However, I'll repeat this:  The concept of a linked list if a figment of languages with pointer data types.  Python abstracts that by allowing attributes to contain references to other objects.  However, you're much better off if you can use Python's list data structure rather than try to emulate an outdated concept in a modern language.
> 
> Gary Herron



From gagsl-py at yahoo.com.ar  Wed Jan 24 20:04:55 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 24 Jan 2007 22:04:55 -0300
Subject: Beginners Tutorial in PDF Format?
In-Reply-To: <zKPth.66058$qO4.61284@newssvr13.news.prodigy.net>
References: <_6Qsh.51414$wc5.5373@newssvr25.news.prodigy.net>
	<1169415358.277431.130640@s34g2000cwa.googlegroups.com>
	<FJTsh.36658$Gr2.32367@newssvr21.news.prodigy.net>
	<mailman.2971.1169427468.32031.python-list@python.org>
	<zKPth.66058$qO4.61284@newssvr13.news.prodigy.net>
Message-ID: <7.0.1.0.0.20070124215923.01e3cb50@yahoo.com.ar>

At Wednesday 24/1/2007 17:57, W. Watson wrote:

>Gabriel Genellina wrote:
> > "W. Watson" <wolf_tracks at invalid.com> escribi? en el mensaje
> > news:FJTsh.36658$Gr2.32367 at newssvr21.news.prodigy.net...
> > Robert Hicks wrote:
> >> W. Watson wrote:
> >>> I'd like to print a tutorial in one fell swoop, but it seems most on the
> >>> various sites are page by page embedded descriptions in the page. Any
> >>> available as a pdf?
> >>
> >> http://docs.python.org/download.html
> >>
> >> http://www.diveintopython.org/
> >>
> >> Thanks, but the first url takes me to a web page that contains the
> >> complete
> >> tutorial. Does choosing pdf (USA) in the table download a file that
> >> contains
> >> all the documents on the list below and to the left?
> >
> > Try again. The first url goes to this page:
> > Download Python 2.5 Documentation (19 September 2006): To download an
> > archive containing all the documents for this version of Python in one
> > of various formats [pdf included, you can choose between Letter/A4].
> > Below, it says "These documents are not available for download
> > individually."
> >
>There is nothing there with the title "Python 2.5 Documentation".

What do you mean? The html <title> tag contains 
"Download Python Documentation", the outstanding 
header (H3) says "Download Python 2.5 
Documentation (19 September 2006)". There are 
links for downloading the docs in various 
formats, including the PDF format you want.
Perhaps you have some browser problem.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From grahn+nntp at snipabacken.dyndns.org  Tue Jan  9 06:57:57 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 9 Jan 2007 11:57:57 GMT
Subject: Colons, indentation and reformatting. (2)
References: <1168323368.592642.314130@i15g2000cwa.googlegroups.com>
	<45a33a24$0$7658$4c368faf@roadrunner.com>
	<1168329449.577659.214890@s34g2000cwa.googlegroups.com>
Message-ID: <slrneq6uv2.tcj.grahn+nntp@frailea.sa.invalid>

On 8 Jan 2007 23:57:29 -0800, Paddy <paddy3118 at netscape.net> wrote:
>
> OK, whilst colons are not sufficient to re-format a completely
> mis-indented file. I'm thinking that they are sufficient for
> reformatting most pasted code blocks when refactoring say?

Let's put it this way: if the formatter can assume the original code is
valid (i.e. has the intended indentation) then it can do all kinds of nifty
things to it.

Personally, I'm happy with what Emacs' python-mode offers: suggested indents
as I type, and a command to indent/de-dent the highlighted block one step.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From CRhode at LacusVeris.com  Wed Jan 17 09:43:39 2007
From: CRhode at LacusVeris.com (Chuck Rhode)
Date: Wed, 17 Jan 2007 08:43:39 -0600
Subject: Conflicting needs for __init__ method
In-Reply-To: <87r6tu80kl.fsf@benfinney.id.au>
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<mailman.2741.1168898073.32031.python-list@python.org>
	<pan.2007.01.16.03.02.03.4711@REMOVEME.cybersource.com.au>
	<740c3aec0701160837r33340866w5ddef3e09a0de537@mail.gmail.com>
	<873b6abp12.fsf@benfinney.id.au>
	<740c3aec0701170103k29c17df9xdb8c32a3a878ac00@mail.gmail.com>
	<87r6tu80kl.fsf@benfinney.id.au>
Message-ID: <20070117144339.GL1906@loki>

Ben Finney wrote this on Wed, Jan 17, 2007 at 08:27:54PM +1100.  My reply is below.

> I recommend, instead, separate factory functions for separate input
> types.

Uh, how 'bout separate subclasses for separate input types?

-- 
.. Chuck Rhode, Sheboygan, WI, USA
.. Weather:  http://LacusVeris.com/WX
.. 7? ? Wind SW 10 mph



From goodepic at gmail.com  Fri Jan  5 16:01:25 2007
From: goodepic at gmail.com (goodepic)
Date: 5 Jan 2007 13:01:25 -0800
Subject: Problem Running Working Code on Mac
In-Reply-To: <w3fnh.11876$Du.9197@newsfe15.lga>
References: <1167946511.531632.41750@11g2000cwr.googlegroups.com>
	<w3fnh.11876$Du.9197@newsfe15.lga>
Message-ID: <1168030884.878349.119950@38g2000cwa.googlegroups.com>

I got rid of all the warnings but the pgdb one.  I got postgresql and
pygresql installed, but the pgdb installed on the base python install
of python 2.3, and isn't found by my updated python 2.5 install, into
which I've successfully installed the other modules I needed.

Anyway, getting mysql and pypar didn't help, and I get those same three
exact warnings when I run the script successfully on my work PC.  I'm
getting the same exact error quoted above still.

Any more ideas?  I really appreciate any help here!!



From __peter__ at web.de  Thu Jan 25 06:05:39 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 25 Jan 2007 12:05:39 +0100
Subject: logging module and doctest
References: <1169703145.393435.166020@m58g2000cwm.googlegroups.com>
	<ep9q9p$1o2$02$1@news.t-online.com>
Message-ID: <epa2tb$4lj$00$1@news.t-online.com>

Peter Otten wrote:

> Gary Jefferson wrote:
> 
>> I've written a logging.filter and would like to use doctest on it
>> (using a StreamHandler for stdout), but this doesn't seem possible.
>> Output from the logger seems to disappear (running the doctest strings
>> through the interpreter as-is yields expected results).  I assume this
>> is because doctest does something with logging.
> 
> It redirects stdout to a StringIO subclass to capture the output.
> 
>> Is there any way to make these work together?
> 
> Using the StreamHandler with something like
> 
> class WrapStdOut(object):
>     def __getattr__(self, name):
>         return getattr(sys.stdout, name)
> 
> instead of sys.stdout directly should work.

Or create the StreamHandler inside your doctest where sys.stdout is already
redirected.

Peter


From kirby.urner at gmail.com  Thu Jan 18 16:22:48 2007
From: kirby.urner at gmail.com (kirby.urner at gmail.com)
Date: 18 Jan 2007 13:22:48 -0800
Subject: Tiling and Spacefilling
Message-ID: <1169155368.600589.211310@a75g2000cwd.googlegroups.com>

[ slightly improved over Math Forum draft ]

Probably a fault line or cultural divide between acutely
differing schools of thought, is in this area of tiling
or mosaic making. Some schools consider this a stupid
waste of time, others a core topic, whereas a 3rd group
stays more neutral on the issue, and a tiny 4th group has
no idea what I'm talking about.

I'm in the second group (core topic) as tiling is to
spacefilling as figurate are to polyhedral numbers.
We may start in a plane, in deference to some millenia
of pre-NASA reflex conditioning, but we're still on a
runway, accelerating, and before long (way sooner than
in traditional curricula), we'll be airborne, moving
up into higher D. Tetrahedra are most definitely a
feature of K-5. If NCTM doesn't grasp that, it's
missing the boat.

Back to tiling: we have the classifications, the Escher
lithographs (which follow into Part Two), and the tie ins
to Mesopotamian religions, the three biggies especially,
and their respective sacred geometries. I know "sacred
geometry" is taboo in traditional mathematics, but this
is ~M!, Katrina Network type stuff, closer to George Bush
Sr.'s "voodoo economics" (except managed more by geeks
(Bush was more of a jock, not that we can't share power)).

Rolling forward, we get to the Kepler-Penrose aperiodic
tiling studies, various heuristics, again finding echoes
in Part Two (in what some Russians call stereometry),
where we likely look at Hargittai & Hargittai (Hungarian),
plus Chakovian coordinates (quadrays, simplicials,
whatever nomenclature).

I've already made the case for Polyhedra numerous times.
Thanks to breakthroughs in architecture in the 20th
century, we're obligated to teach about the hexapent in
some way shape or form. Katrina Network is strong on
this, but you'll find other sources. Top of my list
would be J. Baldwin's 'Bucky Works' (packed with ~M!).

For a more prefrequency approach, I recommend Cromwell's
'Polyhedra', and its cartoon proof of Euler's V + F =
E + 2 based on the interdigitating trees of Von Staudt's.

And of course we're not about to bleep over Fuller's
volumes tables, nor MITEs, nor the Jitterbug Trans-
formation -- all pure gold as far as we're concerned.

So to recap... Given I'm of a school which regards
tiling as core, I'm putting my shoulder behind two big
initiatives in computer science these days: CP4E and
HP4E.

CP4E was hatched by Guido, BDFL of Python Nation, and
DARPA, and carried forward billiantly (at least one
doctoral dissertation already on file, about our early
beginnings as a think tank slash on-line community [1]).

HP4E was hatched by yours trully, though mostly as a
marketing gimmick in homage to CP4E and Wanderer Glenn
Stockton's global matrix campaign. I certainly take
advantage of Python a lot, using its generators (a recent
feature) to spit out successive terms in figurate and
polyhedral number sequences, e.g. 1, 3, 6, 10... and
1, 12, 42, 92... (see my Focal Points for more details,
plus my CP4E website, one of many curriculum "hot springs"
in our cyberspace-based Python Nation [2][3]).

Kirby

[1] John Miller's PhD dissertation, Promoting Computer
Literacy Through Programming Python (1.37 MB), looks at
the issues around teaching with Python, and explores some
of the threads taken up on edu-sig.
http://www.python.org/community/sigs/current/edu-sig/

[2] Focal Points:
http://mybizmo.blogspot.com/2006/09/focal-points.html

[3] CP4E website: http://www.4dsolutions.net/ocn/cp4e.html

===

For more on ~M!:
http://worldgame.blogspot.com/2007/01/m.html



From no-spam at no-spam-no-spam.invalid  Wed Jan 17 06:20:53 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 17 Jan 2007 12:20:53 +0100
Subject: 2.3-2.5 what improved?
In-Reply-To: <mailman.2817.1169029744.32031.python-list@python.org>
References: <mailman.2817.1169029744.32031.python-list@python.org>
Message-ID: <eol0qn$kvj$1@news.albasani.net>

Robin Becker wrote:
> A large cgi based web Python-2.3 application needs to be speed improved. 
> experiments show the following under reasonable testing (these are 2 
> second reportlab pdf productions)
> 
> 1) 2.3 --> 2.5 improvement small 1-2%
> 2) cgi --> fcgi improvement medium 10-12%
> 
> I sort of remember claims being made about 2.5 being 10% faster than 
> 2.4/2.3 etc etc. Can anyone say where the speedups were? Presumably we 
> have a lot of old cruft that could be improved in some way eg moving 
> loops into comprehensions, using iterator methods etc. Are those sort of 
> things what we should look at?

Python 2.5 became quite fat. For bare CGI the Python load/init 
time eats all improvements. Smaller scripts even loose lot of speed.

I still like Python 2.3 for many other reasons for many 
applications - especially for CGI's, on Windows, for deployable 
apps, GUI's etc. because the fat coming with Python 2.4 is not 
balanced by necessary goods - mostly just fancy things.
( I run even a list of patches and module copies/addaptations down 
to 2.3 because of that :-) )

Real news come with Py3K


Robert


From bdesth.quelquechose at free.quelquepart.fr  Sat Jan  6 07:09:16 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 06 Jan 2007 13:09:16 +0100
Subject: howto overload with a NOP (empty statement)
In-Reply-To: <adeb4$459f7a11$d443bb3a$14652@news.speedlinq.nl>
References: <adeb4$459f7a11$d443bb3a$14652@news.speedlinq.nl>
Message-ID: <459f8b36$0$316$426a74cc@news.free.fr>

Stef Mientki a ?crit :
> How should I overload / disable a method ?
> In the example below I have defined the class "Power_Supply", derived 
> from baseclass "device".

<off>
Naming conventions are to use CamelCase for class names. So it would be 
better to name your classes 'PowerSupply' (no '_') and 'Device'. You're 
of course free to use whatever naming convention you want, including no 
convention at all, but Python relies *a lot* on naming conventions...
</off>

> The baseclass has a method "execute",

<off>
Do you know that Python let you define your own 'callable' objects ?

class SomeCallable(object):
   def __init__(self, name):
     self.name = name
   def __call__(self):
     print "wow, %s has been called" % self.name

foo = SomeCallable('foo')
foo()

This may or not make sens in the context of your application, but 
whenever you find yourself naming a method 'execute', it might be worth 
asking yourself if the object should in fact be a callable...
</off>

> which will be implemented in most 
> derived classes, but not in all.
 >
> Now apparently it's not allowed to overload a method with an empty 
> statement.
> I could write a nonsense dummy statement, like "A= 3", but isn't there 
> another way ?

the 'pass' statement

def noop():
   pass

> thanks, Stef Mientki
> 
> class device:
>   def execute (self):
>     print 'execute not yet implemented for', self.Name

The usual idiom for 'pure virtual methods' is to raise a 
NotImplementedError. Now if it's ok for a subclass to implement the 
method as a no-op, why not just implement it as a no-op in the base 
class itself ?


From tjreedy at udel.edu  Tue Jan 23 19:50:12 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 23 Jan 2007 19:50:12 -0500
Subject: free variables /cell objects question
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com><Xns98C17C03B6297duncanbooth@127.0.0.1><1169563580.634000.122540@v45g2000cwv.googlegroups.com>
	<7xbqkpbt6c.fsf@ruckus.brouhaha.com>
Message-ID: <ep6ag4$lba$1@sea.gmane.org>


"Paul Rubin" <"http://phr.cx"@NOSPAM.invalid> wrote in message 
news:7xbqkpbt6c.fsf at ruckus.brouhaha.com...
| or the Python idiom [(lambda i=i: i) for i in range(10)]

While the idiom is commonly written this way, I think it would be clearer 
if the two related but different variables had two different names:
   [(lambda j=i:j) for i in range(10)]

Terry Jan Reedy






From bg_ie at yahoo.com  Wed Jan 10 04:16:57 2007
From: bg_ie at yahoo.com (bg_ie at yahoo.com)
Date: 10 Jan 2007 01:16:57 -0800
Subject: Establishing if an Object is Defined
Message-ID: <1168420616.285450.306460@k58g2000hse.googlegroups.com>

Hi,

The following code works -

one = 1
if one == 1:
  ok = 1
print ok

but this does not, without exception -

one = 2
if one == 1:
  ok = 1
print ok

How do I establish before printing ok if it actually exists so as to
avoid this exception?

Thanks for your help,

Barry.



From S.Mientki-nospam at mailbox.kun.nl  Wed Jan  3 11:47:26 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Wed, 03 Jan 2007 17:47:26 +0100
Subject: function without brackets ?
In-Reply-To: <mailman.2241.1167835668.32031.python-list@python.org>
References: <57668$459bbf95$d443bb3a$16218@news.speedlinq.nl>
	<mailman.2241.1167835668.32031.python-list@python.org>
Message-ID: <9ec5f$459bde0d$d443bb3a$24148@news.speedlinq.nl>


> Hope this helps,
> 
thanks You all guys,
It's perfectly clear to me now !

cheers,
Stef


From Jeff.Demel at JavelinDirect.com  Fri Jan  5 15:43:44 2007
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Fri, 5 Jan 2007 14:43:44 -0600
Subject: Learning to program in Python
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734C15C@DMSP-MSG-EVS01.mail.pvt>

If I were you, I'd think up a project and just build it.  The best way
to really learn is to do, at least for me.  If you run into problems,
then you can come back and ask the group here.  Believe me, I've asked
some very basic questions, and everyone's been very friendly and
helpful.

As an EE major, maybe you can think of some project that interests you
and build it.  One thing that comes to mind is, maybe, a graphical
program to lay out circuits?  Parts inventory program?  Circuit tester?
I don't know, I was an English major, but you get the idea.

Anyway, try to think of a project that includes several of the key
fundamentals of programming that we do every day, like reading and
writing files, reading and writing to a database, GUI development, and
things like that.

HTH

-Jeff
 

-----Original Message-----
From: python-list-bounces+jeff.demel=javelindirect.com at python.org
[mailto:python-list-bounces+jeff.demel=javelindirect.com at python.org] On
Behalf Of jbchua
Sent: Friday, January 05, 2007 2:22 PM
To: python-list at python.org
Subject: Learning to program in Python

Hello everybody.

I am an Electrical Engineering major and have dabbled in several
languages such as Python, C, and Java in my spare time because of my
interest in programming. However, I have not done any practical
programming because I have no idea where to get started. I taught myself
these languages basically by e-tutorials and books. This makes me feel
as if I don't really know how to implement these languages.
Does anybody have any advice on where to start applying my limited
knowledge practically in order to advance my learning?

--
http://mail.python.org/mailman/listinfo/python-list
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From kw at codebykevin.com  Wed Jan 24 09:42:55 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Wed, 24 Jan 2007 09:42:55 -0500
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <45B76FE8.5080701@codebykevin.com>
References: <ep60jp$63v$1@aioe.org> <45B76FE8.5080701@codebykevin.com>
Message-ID: <dc1aa$45b77070$4275d90a$10460@FUSE.NET>

Kevin Walzer wrote:

> 
> Tablelist: http://www.nemethi.de/
> Tabelist for Tkinter (with Tile support):
> http://tkinter.unpythonic.net/wiki/TableListTileWrapper
> 

Additionally, here is a link to some screenshots for Tablelist:

http://www.nemethi.privat.t-online.de/tablelist/screenshots.html


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


From gbrunick at andrew.cmu.edu  Mon Jan  8 19:47:27 2007
From: gbrunick at andrew.cmu.edu (Gerard Brunick)
Date: Mon, 08 Jan 2007 19:47:27 -0500
Subject: Adding functions to classes after definition
Message-ID: <45A2E61F.2080100@andrew.cmu.edu>

Consider:  A)
 >>> class C(object):
...     pass
...
 >>> def f(*args):
...     print args
...    
 >>> C.f = f
 >>> C.f
<unbound method C.f>
 >>> c=C()
 >>> c.f()
(<__main__.C object at 0x04A51170>,)

And B)

 >>> del c
 >>> C.f = types.MethodType(f, None, C)
 >>> C.f
<unbound method C.f>
 >>> c = C()
 >>> c.f()
(<__main__.C object at 0x04A51290>,)

I don't understand A).  It is my vague understanding, that methods are
really properties that handle binding on attribute access, so B) should
be the "right" way to add a method to a class after definition.  Why does
A show up as a method?  Shouldn't it still just be a function?  Certainly
when you define a class, there is some magic in the __new__ method that
turns functions in the initial dictionary into methods, but does this still
happen for all setattr after that?  Is is possible to set a class attribute
equal to a regular (types.FunctionType) function?

Any references that discuss these issues would be greatly appreciated.

Thanks,
Gerard


From pavlovevidence at gmail.com  Fri Jan  5 20:57:00 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 5 Jan 2007 17:57:00 -0800
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <1168042215.514023.121560@s80g2000cwa.googlegroups.com>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
	<1168042215.514023.121560@s80g2000cwa.googlegroups.com>
Message-ID: <1168048620.409190.85870@v33g2000cwv.googlegroups.com>


Martin Miller wrote:
> ### non-redundant example ###
> import sys
>
> class Pin:
>     def __init__(self, name, namespace=None):
>         self.name = name
>         if namespace == None:
>             # default to caller's globals
>             namespace = sys._getframe(1).f_globals
>         namespace[name] = self
>
> Pin('aap')       # create a Pin object named 'aap'
> Pin('aap2')     # create a Pin object named 'aap2'
> print aap.name
> print aap2.name

The problem with this is that it only works for global namespaces,
while failing silently and subtly if used in a local namespace:

def fun():
    Pin('aap')
    aap1 = aap
    fun2()
    aap2 = aap
    print aap1 is aap2

def fun2():
    Pin('aap')

If it's your deliberate intention to do it with the global namespace,
you might as well just use globals() and do it explicitly, rather than
mucking around with Python frame internals.  (And it doesn't make the
class unusable for more straightforward uses.)

for _name in ('aap','dcr'):
    globals()[_name] = Pin(_name)
del _name


Carl Banks



From martin at v.loewis.de  Wed Jan  3 10:50:36 2007
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Wed, 03 Jan 2007 16:50:36 +0100
Subject: Filename encoding on XP
In-Reply-To: <mailman.2227.1167786510.32031.python-list@python.org>
References: <mailman.2227.1167786510.32031.python-list@python.org>
Message-ID: <459bd0cc$0$20860$9b622d9e@news.freenet.de>

kent sin schrieb:
> What encoding does the NTFS store the filename?

In UTF-16LE. However, on-disk storage is mostly irrelevant, what
matters is what encoding is used on the OS API.

Windows has two forms of file API: Wide (Unicode) and ANSI
(byte-oriented). On NT, the Wide API is "native"; the ANSI API
converts strings forth and back (introducing ? if the conversion
fails).

> I use walk, then print the filename, there are some ? in it, but some
> Chinese characters were display with no problem. I suspect the
> encoding of the filename is not unicode. 

You need to pass a Unicode string into walk as the directory; then
recursively all results should also be Unicode strings.

Regards,
Martin




From deets at nospam.web.de  Wed Jan 24 12:59:46 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 24 Jan 2007 18:59:46 +0100
Subject: Thoughts on using isinstance
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<mailman.3077.1169645738.32031.python-list@python.org>
	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>
	<mailman.3087.1169652310.32031.python-list@python.org>
	<1169656371.689791.216360@v33g2000cwv.googlegroups.com>
	<pan.2007.01.24.16.49.21.555688@gmx.net>
	<1169659264.605545.211000@s48g2000cws.googlegroups.com>
Message-ID: <51pl4jF1klvcfU1@mid.uni-berlin.de>

abcd wrote:

> good point.  is there place that documents what methods/attrs I should
> check for on an object?  for example, if its a list that I expect I
> should verify the object that is passed in has a ??? function? etc.

Don't check, try. Catch a possible exception, and continue with another type
assumption. The only thing one often checks is for basestring, as
basestring supports iteration, but more than often isn't supposed to be
iterated over. 

Small example to gather all strings out of a tree of objects (untested):

def foo(arg):
   # string case
   if isinstance(arg, basestring):
      return [arg]
   # dict-like
   try:
      res = []
      for value in arg.itervalues():
          res.extend(foo(value))
      return res
   except AttributeError:
      pass
   # generally iterables
   res = []
   for value in arg:
       res.extend(foo(value))
   return res

Diez


From bignose+hates-spam at benfinney.id.au  Wed Jan 31 01:36:03 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 31 Jan 2007 17:36:03 +1100
Subject: parent-child object design question
References: <1170136965.015119.225920@q2g2000cwa.googlegroups.com>
	<mailman.3297.1170139632.32031.python-list@python.org>
	<1170220553.843010.258260@a34g2000cwb.googlegroups.com>
Message-ID: <871wlbwvn0.fsf@benfinney.id.au>

"manstey" <manstey at csu.edu.au> writes:

> Could I also do something like the following?

I can't immediately see a problem with the code you posted. Does it do
what you want it to do?

> What does it mean to store the parent class as a private variable in
> the child class?

I don't understand this question. It's up to you what it means; I
leave it to the people who know the purpose of the program to decide
whether "parent" is even an appropriate term.

-- 
 \        "I took a course in speed waiting. Now I can wait an hour in |
  `\                              only ten minutes."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From simon at brunningonline.net  Wed Jan 17 06:05:11 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Wed, 17 Jan 2007 11:05:11 +0000
Subject: Python and Soap protocol
In-Reply-To: <164s123s8zosf$.gx6o8cywx5af.dlg@40tude.net>
References: <164s123s8zosf$.gx6o8cywx5af.dlg@40tude.net>
Message-ID: <8c7f10c60701170305w19a46b05i12041d817f660f89@mail.gmail.com>

On 1/16/07, Grzegorz Smith <gregtech at wp.pl> wrote:
> Hi folks
> I must write webb application that will comunicate with delphi desktop
> application by SOAP protocol. Can you recommend any Python Soap Libary?
> I founded: SOAPpy and Zolera SOAP Infrastructure (ZSI). Any tip which is
> better to use?

IFAICT, SOAPpy isn't maintained any longer, so on that basis I'd recommend ZSI.

-- 
Cheers,
Simon B
simon at brunningonline.net


From hg at nospam.org  Mon Jan  8 02:40:07 2007
From: hg at nospam.org (hg)
Date: Mon, 08 Jan 2007 08:40:07 +0100
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
Message-ID: <%Isoh.22447$X97.12337@newsfe18.lga>

sturlamolden wrote:

> The designers of Java, C++, C#, Ada95, Delphi, etc. seem to think that
> if an object's 'internal' variables or states cannot be kept private,
> programmers get an irresistible temptation to mess with them in
> malicious ways. But if you are that stupid, should you be programming
> in any language? The most widely used language is still C, and there is
> no concept of private data in C either, nor is it needed.


void test(void)
{
  static int i;
}


Do you agree that i is "private" to test ?

hg



From CedricCicada at gmail.com  Fri Jan 19 14:12:05 2007
From: CedricCicada at gmail.com (CedricCicada at gmail.com)
Date: 19 Jan 2007 11:12:05 -0800
Subject: My first try using logger didn't work. Why?
In-Reply-To: <1169233154.076956.231540@q2g2000cwa.googlegroups.com>
References: <1169221734.071338.107190@11g2000cwr.googlegroups.com>
	<1169224835.820468.316040@v45g2000cwv.googlegroups.com>
	<1169233154.076956.231540@q2g2000cwa.googlegroups.com>
Message-ID: <1169233925.571841.75480@a75g2000cwd.googlegroups.com>

Vinay (or anybody else),

Well, now that logging is working, how do I stop it from working?

I'm developing in PythonWin.  When I run my test script, I get one
message.  When I run it a second time, I get two, a third time gets me
three, and so on.

I feel like the Sorceror's Apprentice!

Rob



From tim at tdw.net  Wed Jan 24 10:24:40 2007
From: tim at tdw.net (Tim Williams)
Date: Wed, 24 Jan 2007 15:24:40 +0000
Subject: smtplib starttls gmail example - comments?
In-Reply-To: <G63739065.350.594.3@mxextra>
References: <W63698683.410.134.1@mxextra>
	<9afea2ac0701240256kae247b3s666be6529362c84e@mail.gmail.com>
	<G63739065.350.594.3@mxextra>
Message-ID: <9afea2ac0701240724v6416c530v2e97d7c7ccd701f3@mail.gmail.com>

On 24/01/07, BJ Swope <bigblueswope at gmail.com> wrote:
>
>
>
> On 1/24/07, Tim Williams <tim at tdw.net> wrote:
> >
> > On 24/01/07, py <py at th.on> wrote:
> > > I would love for anybody to comment on this code with regard to
> redundancy/efficiency/wordiness or whatever else.
> > > for instance, do i understand correctly that i cant have a try: else:
> without an intervening except:?
> > > -dave
> > >
> > >         stdout.write("calling smtp server...")
> > >         try:
> > >             server = SMTP(msgsmtp)
> > >         except:
> > >             stdout.write("FAIL.")   #using .write to avoid the implied
> \n with print
> > >         else:
> > >             server.set_debuglevel(msgdebug)
> > >             stdout.write("starting tls...")
> > >             server.ehlo(msgfrom)
> > >             try:    server.starttls ()
> > >             except: stdout.write("FAIL.")
> > >             else:
> > >                 server.ehlo(msgfrom)           #neessary duplication (?)
> > >                 stdout.write("logging in...")
> > >                 try:    server.login(msgfrom, msgpass)
> > >                 except: stdout.write("FAIL.")
> > >                 else:
> > >                     stdout.write("sending...")
> > >                     try:    server.sendmail(msgfrom, msgto, msgtxt +
> "\n.\n")
> > >                     except: stdout.write("FAIL.")
> > >                     else:
> > >                         try:
> > >                             server.quit()
> > >                         except sslerror:      # a known and largely
> ignored issue with early EOF in ssl protocol
> > >                             stdout.write("success.")
> > >                         else:
> > >                             stdout.write("success.")
> > > --
> >
> >
> > *** Not tested  but should have the same functionality and error
> > handling as your script ***
> >
> > this_host = 'myhostname.mydom1.com'
> > print "calling smtp server...", #  the trailing comma removes '\n'
> > try:
> >     server =
> smtplib.SMTP(msgsmtp,local_hostname=this_host)
> >     server.set_debuglevel(msgdebug)
> >     print "starting tls...",
> >     server.starttls()
> >     server.ehlo(this_host)  # RFC requirement for 2nd EHLO after
> requesting TLS
> >     print "logging in...",
> >     server.login(msgfrom, msgpass)
> >     print "sending...",
> >     failed = server.sendmail(msgfrom, msgto, msgtxt + "\n.\n")
> >     try:
> >         server.quit()
> >     except: pass
> >     print "success."
> > except:
> >     print "FAIL.",
> >
> > if failed:
> >     print "failed:", failed  # some recipients, but not all of them,
> failed
> > --
> > http://mail.python.org/mailman/listinfo/python-list
>
>
> Both examples have included the cardinal sin in smtp...
>
>  They both send the message text followed by new line dot new line.
>
>  The smtp protocol specifically mentions CRLF dot CRLF.   Please please
> please use \r\n.\r\n in your code...
>

Ha, yeah I didn't spot that,  but then I wasn't looking for it either :)

However, Its not an issue with smtplib because its takes these kind of
things into account by:

* modifying line endings that aren't RFC compliant to CRLFs.
* normalising/changing a single leading dot (.) to dot dot (..)
* adding the CRLF dot CRLF to the end of the supplied message text.

So adding adding "\n.\n" to the end of the msg text will just add a
line containing  ".."  to the end of the message text, it won't
terminate the DATA part.

that line should therefore be just

failed = server.sendmail(msgfrom, msgto, msgtxt)

:)


From jzgoda at o2.usun.pl  Mon Jan 22 16:53:36 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Mon, 22 Jan 2007 22:53:36 +0100
Subject: Python Windows Editors
In-Reply-To: <ea71a$45b5141c$d443bb3a$3908@news.speedlinq.nl>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<ep33ul$6cr$1@atlantis.news.tpi.pl>
	<ea71a$45b5141c$d443bb3a$3908@news.speedlinq.nl>
Message-ID: <ep3bq3$k4e$1@atlantis.news.tpi.pl>

Stef Mientki napisa?(a):

>  Any text editor is only as good as the
>> programmer who uses it. ;)
>>
> Yes but an IDE is different ;-)

Would it make me better Fortran programmer? ;)

-- 
Jarek Zgoda
http://jpa.berlios.de/


From __peter__ at web.de  Fri Jan 26 15:17:14 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 26 Jan 2007 21:17:14 +0100
Subject: Unicode error handler
References: <mailman.3212.1169841312.32031.python-list@python.org>
Message-ID: <epdnjh$8e1$03$1@news.t-online.com>

Rares Vernica wrote:

> Is there an encode/decode error handler that can replace all the
> not-ascii letters from iso-8859-1 with their closest ascii letter?

A mapping, not an error handler, but it might do the job:

http://effbot.org/zone/unicode-convert.htm

Peter


From macdev at artins.org  Fri Jan  5 04:16:31 2007
From: macdev at artins.org (Ben Artin)
Date: Fri, 05 Jan 2007 04:16:31 -0500
Subject: checking one's type
References: <mailman.2314.1167986448.32031.python-list@python.org>
Message-ID: <macdev-30049E.04162805012007@reserved-multicast-range-not-delegated.example.com>

In article <mailman.2314.1167986448.32031.python-list at python.org>,
 belinda thom <bthom at cs.hmc.edu> wrote:

> I've been using the following hack to determine if a type is  
> acceptable and I suspect there is a better way to do it:
> 
> e.g.
> 
> if type(s) == type("") :
>     print "okay, i'm happy you're a string"
> 
> If anyone knows a better way, I'm all ears.

If you want to know whether something is specifically a string, but not a 
Unicode string, then you want isinstance(foo, str). If you want to check whether 
something is a general string (including Unicode strings), you want 
isinstance(foo, basestring).

hth

Ben

-- 
If this message helped you, consider buying an item
from my wish list: <http://artins.org/ben/wishlist>

I changed my name: <http://periodic-kingdom.org/People/NameChange.php>


From martin at v.loewis.de  Wed Jan 10 01:42:22 2007
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Wed, 10 Jan 2007 07:42:22 +0100
Subject: distutils and ctypes
In-Reply-To: <mailman.2504.1168386142.32031.python-list@python.org>
References: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>	<45A3FF17.2070509@v.loewis.de>	<mailman.2497.1168377134.32031.python-list@python.org>	<45a41b1f$0$19653$9b622d9e@news.freenet.de>
	<mailman.2504.1168386142.32031.python-list@python.org>
Message-ID: <45A48ACE.9000404@v.loewis.de>

Robert Kern schrieb:
> To which I say that doing the type-checking and error handling is much easier in
> Python than using the C API. Add to that the tediousness of the edit-compile-run
> cycle of C and the finickiness of refcounting.

Sure: edit-compile-run is tedious, but in the given case, it is
necessary anyway. Also, refcounting is finicky, but with ctypes,
you often have to use just as finicky memory management APIs.
(such as using specific allocation and deallocation routines,
or having to do memory management at all when in C you would
do stack allocation).

My main concern with ctypes is that you have to duplicate
information from the header files, which is error-prone,
especially when the header files may change (either across
versions or across target systems).

Regards,
Martin


From bussieremaillist at gmail.com  Sun Jan 14 00:19:23 2007
From: bussieremaillist at gmail.com (bussiere maillist)
Date: Sun, 14 Jan 2007 06:19:23 +0100
Subject: speech recognition linux and python
Message-ID: <8a8f62c80701132119t74137a9ayd0a6ee2912f83ef9@mail.gmail.com>

just for my hobby,
i'am looking in a way to try voice recongnition on linux with python
but with google i didn't find anything probant.

By the way does someones can give me some tips or url to digg in this
way particulary ?

Is there anyway to use python for voice recognition on linux ?
If yes with what ?

Regards
bussiere
"speech recognition linux and python"


From stargaming at gmail.com  Wed Jan 31 13:08:26 2007
From: stargaming at gmail.com (Stargaming)
Date: Wed, 31 Jan 2007 19:08:26 +0100
Subject: where has Stani's Py Editor gone?
In-Reply-To: <774wh.208375$MO2.74678@fe3.news.blueyonder.co.uk>
References: <774wh.208375$MO2.74678@fe3.news.blueyonder.co.uk>
Message-ID: <epqlut$1s5r$1@ulysses.news.tiscali.de>

John Pote schrieb:
> Hi everyone,
> 
> Been trying to get the latest version of Stani's Python Editor the last few 
> days. But I cannot get any response out of 'pythonide.stani.be'. Anyone know 
> what's happened?
> 
> Ta much,
> 
> John Pote 
> 
> 

http://developer.berlios.de/project/showfiles.php?group_id=4161


From "trades\" at (none)  Mon Jan 29 18:17:11 2007
From: "trades\" at (none) (none)
Date: Mon, 29 Jan 2007 17:17:11 -0600
Subject: deepcopy alternative?
Message-ID: <45be808e$0$27074$4c368faf@roadrunner.com>

I have a very complex data structure which is basically a class object 
containing (sometimes many) other class objects, function references, 
ints, floats, etc.  The man for the copy module states pretty clearly 
that it will not copy methods or functions.  I've looked around for a 
while (prob just using the wrong keywords) and haven't found a good 
solution.  As a workaround I've been using cPickle, loads(dumps(obj)) 
which is incredibly slow (~8 sec for a 1000 elem list).

I believe the only thing stopping me from doing a deepcopy is the 
function references, but I'm not sure.  If so is there any way to 
transform a string into a function reference(w/o eval or exec)?

Example
from copy import deepcopy
a = ClassObj([ClassObj([3.2, 'str', funcRef]), 4, ClassObj[funcRef])
b = deepcopy(a)
TypeError: function() takes at least 2 arguments (0 given)

All I want is a deepcopy of the list.  Any suggestions would be appreciated.

Jack Trades

PS: If the answer to this is in __getstate__() or __setstate__() is 
there some reference to how these should be implemented besides the 
library reference?


From heikki at osafoundation.org  Wed Jan 10 17:57:44 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Wed, 10 Jan 2007 14:57:44 -0800
Subject: Wierd M2Crypto bug - phony "peer did not return certificate" error
In-Reply-To: <YK%oh.17173$sR.6972@newssvr29.news.prodigy.net>
References: <YK%oh.17173$sR.6972@newssvr29.news.prodigy.net>
Message-ID: <ovWdnZTGuYL38jjYnZ2dnUVZ_rqdnZ2d@comcast.com>

John Nagle wrote:
> I have a little test case for M2Crypto, which just opens up SSL
> connections to
> web servers and reads their certificates.  This works fine.
> 
> But if I execute
> 
>     socket.setdefaulttimeout(5.0)

Yup, this is a known problem, this breaks all M2Crypto code that uses
sockets. The Twisted wrapper part still works, as it hands the network
activity to Twisted.

If you can make do without setdefaulttimeout you should be fine.

This is bug https://bugzilla.osafoundation.org/show_bug.cgi?id=2341

The bug has a patch that works on Linux, but it would need Windows and
Mac specific parts before it can be checked in.

-- 
  Heikki Toivonen


From martin at v.loewis.de  Mon Jan 29 16:11:51 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 29 Jan 2007 22:11:51 +0100
Subject: Convert from unicode chars to HTML entities
In-Reply-To: <pan.2007.01.29.05.13.04.686937@REMOVEME.cybersource.com.au>
References: <pan.2007.01.29.03.05.23.166735@REMOVEME.cybersource.com.au>
	<45bd7a82$0$17928$4d3efbfe@news.sover.net>
	<pan.2007.01.29.05.13.04.686937@REMOVEME.cybersource.com.au>
Message-ID: <45BE6317.4040506@v.loewis.de>

Steven D'Aprano schrieb:
> A few issues:
> 
> (1) It doesn't seem to be reversible:
> 
>>>> '&#169; and many more...'.decode('latin-1')
> u'&#169; and many more...'
> 
> What should I do instead?

For reverse processing, you need to parse it with an
SGML/XML parser.

> (2) Are XML entities guaranteed to be the same as HTML entities?

Please make a terminology difference between "entity", "entity
reference", and "character reference".

An (external parsed) entity is a named piece of text, such
as the copyright character. An entity reference is a reference
to such a thing, e.g. &copy;

A character reference is a reference to a character, not to
an entity. xmlcharrefreplace generates character references,
not entity references (let alone generating entities). The
character references in XML and HTML both reference by
Unicode ordinal, so it is "the same".

> (3) Is there a way to find out at runtime what encoders/decoders/error
> handlers are available, and what they do? 

Not through Python code. In C code, you can look at the
codec_error_registry field of the interpreter object.

Regards,
Martin


From gagsl-py at yahoo.com.ar  Tue Jan  2 21:57:13 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 02 Jan 2007 23:57:13 -0300
Subject: Iterate through list two items at a time
In-Reply-To: <enf2he$2sr1@cnn.xsj.xilinx.com>
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
Message-ID: <7.0.1.0.0.20070102234931.04a2d658@yahoo.com.ar>

At Tuesday 2/1/2007 22:57, Dave Dean wrote:

>   myList = [1,2,3,4,5,6]
>
>I'd like to be able to pull out two items at a time - simple examples would
>be:
>Create this output:
>1 2
>3 4
>5 6

b=iter(a)
for x in b:
    y=b.next()
    print x,y

b=iter(a)
for x,y in ((item, b.next()) for item in b):
    print x,y

>Create this list:
>[(1,2), (3,4), (5,6)]

b=iter(a)
[(item, b.next()) for item in b]

Note that they don't behave the same at the corner cases (empty list, 
single item, odd length...)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From horpner at yahoo.com  Mon Jan  8 10:03:53 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 8 Jan 2007 16:03:53 +0100
Subject: recursive function
References: <1168265240.294223.298750@s80g2000cwa.googlegroups.com>
Message-ID: <slrneq4ne7.k8.horpner@FIAD06.norwich.edu>

On 2007-01-08, cesco <fd.calabrese at gmail.com> wrote:
> Hi,
>
> I have a dictionary of lists of tuples like in the following example:
> dict = {1: [(3, 4), (5, 8)],
>         2: [(5, 4), (21, 3), (19, 2)],
>         3: [(16, 1), (0, 2), (1, 2), (3, 4)]]
>
> In this case I have three lists inside the dict but this number
> is known only at runtime. I have to write a function that
> considers all the possible combinations of tuples belonging to
> the different lists and return a list of tuples of tuples for
> which the sum of the first element of the most inner tuple is
> equal to N.
>
> For example, assuming N = 24, in this case it should return:
> [((3, 4), (5, 4), (16, 1)), ((3, 4), (21, 3), (0, 2)), ((5, 8), (19,
> 2), (0, 2))]

What do you mean by "most inner tuple"?

> A simple list comprehension would be enough if only I knew the
> number of keys/lists beforehand

len(dict.keys()).

-- 
Neil Cerutti
Next Sunday Mrs. Vinson will be soloist for the morning service. The pastor
will then speak on "It's a Terrible Experience." --Church Bulletin Blooper


From jhefferon at smcvt.edu  Tue Jan 30 08:29:22 2007
From: jhefferon at smcvt.edu (Jim)
Date: 30 Jan 2007 05:29:22 -0800
Subject: error messages containing unicode
In-Reply-To: <epngj2$sv9$03$1@news.t-online.com>
References: <1170122515.980168.150960@p10g2000cwp.googlegroups.com>
	<pan.2007.01.30.02.48.10.853852@REMOVEME.cybersource.com.au>
	<1170160464.576122.62230@h3g2000cwc.googlegroups.com>
	<528sn0F1nhkoiU1@mid.uni-berlin.de>
	<1170162459.577853.282090@l53g2000cwa.googlegroups.com>
	<epngj2$sv9$03$1@news.t-online.com>
Message-ID: <1170163762.145431.133400@j27g2000cwj.googlegroups.com>

On Jan 30, 8:18 am, Peter Otten <__pete... at web.de> wrote:
> >>> try:...     raise Exception(u"gew?hnlich ?hnlich ?blich")
> ... except Exception, e:
> ...     print e.message
> ...
> gew?hnlich ?hnlich ?blich
Ah, so that's what "If there is a single argument (as is preferred), 
it is bound to the message attribute" means.  Through some imbecility 
I failed to understand it.  Thank you.

> If you're writing to a file you still have to encode explicitly.
Yes; I know that.  It wasn't what to do with the unicode object that 
confused me, it was how to get it in the first place.

Much obliged,
Jim



From macdev at artins.org  Sun Jan  7 06:31:08 2007
From: macdev at artins.org (Ben Artin)
Date: Sun, 07 Jan 2007 06:31:08 -0500
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
Message-ID: <macdev-1AECB4.06310807012007@reserved-multicast-range-not-delegated.example.com>

In article <1168128425.058049.221320 at v33g2000cwv.googlegroups.com>,
 "time.swift at gmail.com" <time.swift at gmail.com> wrote:

> Coming from a C++ / C# background, the lack of emphasis on private data
> seems weird to me. I've often found wrapping private data useful to
> prevent bugs and enforce error checking..
> 
> It appears to me (perhaps wrongly) that Python prefers to leave class
> data public.  What is the logic behind that choice?
> 
> Thanks any insight.

One thing that the other posters didn't mention is that if you access data 
members of a class in C++ you end up with a very tight coupling with that class. 
If the class later changes so that the data is no longer part of the public 
interface, then every user of the class has to change the code and recompile.

In Python, on the other hand, if I have a piece of public data that I later 
decide to replace with an accessor method, I can do that without changing any of 
the code that uses the class. 

So, insistence on private data in C++ is a good thing because it reduces the 
level of coupling between a class and its clients. In Python, this is not an 
issue, because the same loose coupling can be obtained with data as well as 
accessor methods, and therefore public data is used when possible and private 
data when necessary.

hth

Ben

-- 
If this message helped you, consider buying an item
from my wish list: <http://artins.org/ben/wishlist>

I changed my name: <http://periodic-kingdom.org/People/NameChange.php>


From AleydisGP at gmail.com  Sun Jan  7 16:35:27 2007
From: AleydisGP at gmail.com (AleydisGP at gmail.com)
Date: 7 Jan 2007 13:35:27 -0800
Subject: Working with Excel inside Python
Message-ID: <1168205727.130771.257030@51g2000cwl.googlegroups.com>

I have a .plt file (which is a tab delimited ASCII file) and I want to
format it to get a .dbf with data in rows and columns, detele some
rows/columns and substitute decimal '.' with ','. All this using Python
(I'm using Pythonwin).

The .plt file looks like this:

* ISCST3 (02035): Tersa
* MODELING OPTIONS USED:
*  CONC                    URBAN ELEV         DFAULT

*         PLOT FILE OF ANNUAL VALUES FOR SOURCE GROUP: ALL
*         FOR A TOTAL OF   400 RECEPTORS.
*         FORMAT: (3(1X,F13.5),1X,F8.2,2X,A6,2X,A8,2X,I8.8,2X,A8)
*        X             Y      AVERAGE CONC   ZELEV
*  ___________   ___________   ___________   ______
  430342.00000 4580537.00000       0.25426    19.28
  430842.00000 4580537.00000       0.27233    14.72
  431342.00000 4580537.00000       0.30566     2.84
  431842.00000 4580537.00000       0.30379     0.21
  432342.00000 4580537.00000       0.27413     1.13
  432842.00000 4580537.00000       0.25462     0.00
  433342.00000 4580537.00000       0.25114     0.00
  433842.00000 4580537.00000       0.28779     0.00
  434342.00000 4580537.00000       0.29707     0.00
  434842.00000 4580537.00000       0.31067     0.00
 ....


I recorded a macro in Excel with the whole process, but when trying to
translate it into Python I get syntax errors which I don't know how to
solve.

This is my python code:
## ------------------------------------------
import win32com.client
excel = win32com.client.Dispatch("Excel.Application")
excel.Visible = 0
workbook=excel.Workbooks.Open('D:\AN00GALL.plt')

excel.Columns("A:A").Select
excel.Selection.Replace What:=".", Replacement:=",", LookAt:=xlPart, _
        SearchOrder:=xlByRows, MatchCase:=False, SearchFormat:=False, _
        ReplaceFormat:=False

excel.Columns("A:A").Select
excel.Selection.TextToColumns Destination:=Range("A1"),
DataType:=xlFixedWidth, _
        FieldInfo:=Array(Array(0, 1), Array(2, 1), Array(14, 1),
Array(29, 1), Array(42, 1), _
        Array(53, 1), Array(59, 1), Array(71, 1), Array(79, 1)),
ThousandsSeparator:=" ", _
        TrailingMinusNumbers:=True

excel.Selection.Delete Shift:=xlToLeft

excel.Rows("1:6").Select
excel.Selection.Delete Shift:=xlUp
excel.Rows("2:2").Select
excel.Selection.Delete Shift:=xlUp

excel.Columns("A:C").Select
excel.Selection.NumberFormat = "0.00000"
excel.Columns("D:D").Select
excel.Selection.NumberFormat = "0.00"
excel.ActiveWorkbook.SaveAs Filename:= _
    "D:\AN00GALL.dbf", FileFormat:= _
    xlDBF4, CreateBackup:=False

excel.Quit()
## ------------------------------------------

Any ideas on what am I doing wrong?
Thank you.



From dieterv at optionexplicit.be  Fri Jan 26 03:25:04 2007
From: dieterv at optionexplicit.be (Dieter Verfaillie)
Date: Fri, 26 Jan 2007 09:25:04 +0100
Subject: Module for SVG?
In-Reply-To: <9e2f512b0701251058k97ead4h89ccf1f4a40f269a@mail.gmail.com>
References: <9e2f512b0701251058k97ead4h89ccf1f4a40f269a@mail.gmail.com>
Message-ID: <1169799904.5334.12.camel@PO001>

On Thu, 2007-01-25 at 15:58 -0300, Sebastian Bassi wrote:
> Hello,
> 
> I found http://www2.sfk.nl/svg as a Python module for writing SVG.
> Last update was in 2004 and I am not sure if there is something
> better.
> Any recommendation for generating SVG graphics?
> Best,
> SB.

Cairo ( http://cairographics.org/pycairo ), using cairo.SVGSurface().
As a bonus, if you'd ever need it, you can switch to a different Surface
(for example ps or pdf) and use the same drawing code with it.

There's a good tutorial on http://www.tortall.net/mu/wiki/CairoTutorial

hth,
Dieter



From tim.tadh at gmail.com  Mon Jan  1 21:36:10 2007
From: tim.tadh at gmail.com (Tim Henderson)
Date: 1 Jan 2007 18:36:10 -0800
Subject: OO question
In-Reply-To: <1167700159.792649.61210@a3g2000cwd.googlegroups.com>
References: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
	<1167639280.181587.242490@s34g2000cwa.googlegroups.com>
	<1167700159.792649.61210@a3g2000cwd.googlegroups.com>
Message-ID: <1167705370.185259.126380@v33g2000cwv.googlegroups.com>

On Jan 1, 8:09 pm, fejkadr... at hushmail.com wrote:
> Lets say I have those two classes, Person and Address. How would one
> implement the relationship between them? First, a Person can have one
> or more addresses (or none), that could be represented as a list of
> Addresses, right? But then, if I have an Address I want to see which
> persons who live there, then I would have a list of Persons in each
> Address.
>
> Is this doubly-linked way of doing it a good way of doing it, or is
> there
> a better "OO way" I haven't learned yet?

Since you are making an address book and not a person book I would
start out by making a simple list of addresses. Each address could have
a "person" or a "name" field. You could then sort your list by the name
of each person associated with each address. If an address has no
person associated with it then you put it at the beginning (or end if
you want) of the list. I think this would most closely mimic how a
rolodex works. It doesn't really matter if you implement it as a list
of dictionaries or a list classes I believe they would be equivalent in
this case.

tim



From wleftwich at gmail.com  Wed Jan  3 22:43:32 2007
From: wleftwich at gmail.com (Wade Leftwich)
Date: 3 Jan 2007 19:43:32 -0800
Subject: Iterate through list two items at a time
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
	<12pmahqc7kclbfc@corp.supernews.com>
Message-ID: <1167882211.696350.271620@s34g2000cwa.googlegroups.com>


Jeffrey Froman wrote:
> Dave Dean wrote:
>
> >  I'm looking for a way to iterate through a list, two (or more) items at a
> > time.
>
> Here's a solution, from the iterools documentation. It may not be the /most/
> beautiful, but it is short, and scales well for larger groupings:
>
> >>> from itertools import izip
> >>> def groupn(iterable, n):
> ...     return izip(* [iter(iterable)] * n)
> ...
> >>> list(groupn(myList, 2))
> [(0, 1), (2, 3), (4, 5), (6, 7), (8, 9), (10, 11)]
> >>> list(groupn(myList, 3))
> [(0, 1, 2), (3, 4, 5), (6, 7, 8), (9, 10, 11)]
> >>> list(groupn(myList, 4))
> [(0, 1, 2, 3), (4, 5, 6, 7), (8, 9, 10, 11)]
> >>> for a,b in groupn(myList, 2):
> ...     print a, b
> ...
> 0 1
> 2 3
> 4 5
> 6 7
> 8 9
> 10 11
> >>>
>
> Jeffrey

This works great except you lose any 'remainder' from myList:

>>> list(groupn(range(10),3))
[(0, 1, 2), (3, 4, 5), (6, 7, 8)]  # did not include (9,)

The following might be more complex than necessary but it solves the
problem, and like groupn()
it works on infinite lists.

from itertools import groupby, imap
def chunk(it, n=0):
    if n == 0:
        return iter([it])
    grouped = groupby(enumerate(it), lambda x: int(x[0]/n))
    counted = imap(lambda x:x[1], grouped)
    return imap(lambda x: imap(lambda y: y[1], x), counted)

>>> [list(x) for x in chunk(range(10), 3)]
[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9]]

Note the chunks are iterators, not tuples as in groupn():

>>> [x for x in chunk(range(10), 3)]
[<itertools.imap object at 0xb78d4c4c>,
 <itertools.imap object at 0xb78d806c>,
 <itertools.imap object at 0xb78d808c>,
 <itertools.imap object at 0xb78d4c6c>]


-- Wade Leftwich
Ithaca, NY



From http  Sat Jan 20 00:43:45 2007
From: http (Paul Rubin)
Date: 19 Jan 2007 21:43:45 -0800
Subject: OT Annoying Habits (Was: when format strings attack)
References: <mailman.2917.1169243036.32031.python-list@python.org>
Message-ID: <7xirf2w8vi.fsf@ruckus.brouhaha.com>

"Carroll, Barry" <Barry.Carroll at psc.com> writes:
> When I was last a regular Usenet citizen the Internet was new, GUI
> interfaces were experimental and the World Wide Web didn't exist yet.
> Newsreader software was text-based.  Top-posting was the common
> practice, because it was the most convenient.

No.  Top posting has always been an aberrance.  It first appeared in
Usenet when Usenet (a word whose etymology comes from "Unix" and
"network") started attracting Microsoft Windows users, who were in the
habit of using Windows products that top-posted.  That happened fairly
far along in Usenet's evolution, since Usenet got started in the late
1970's when there was no such thing as Microsoft.  Usenet itself
inherited some of its conventions from Arpanet culture, which got
started in the 1960's.

> you didn't have to page through an arbitrarily large number of
> messages, most of which you'd already read umpteen times, to get to
> the new stuff you were interested in.

Proper Usenet convention has always been to trim out the previous
stuff except what you were directly replying to, and to intersperse
that stuff, like this message.  The practice of splatting in umpteen
layers of unedited past messages (whether at the top or bottom) is
another abomination popularized by those same Windows products.


From rridge at csclub.uwaterloo.ca  Fri Jan 19 15:48:14 2007
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 19 Jan 2007 12:48:14 -0800
Subject: Determining when a file is an Open Office Document
References: <eop5ci$et5$1@solaris.cc.vt.edu>
	<1169171820.851021.49200@l53g2000cwa.googlegroups.com>
	<eopicc$95t$1@solaris.cc.vt.edu>
Message-ID: <1169239691.159739.304050@l53g2000cwa.googlegroups.com>

tubby wrote:
> Now, If only I could something like that on PDF files :)

PDF files should begin with "%PDF-" followed by a version number, eg.
"%PDF-1.4".  The PDF Reference notes that Adobe Acrobat Reader is a bit
more flexiable about what it will accept:

    13. Acrobat viewers require only that the header appear
          somewhere within the first 1024 bytes of the file.
    14. Acrobat viewers also accept a header of the form
          %!PS-Adobe-N.n PDF-M.m

So identifying PDF files is pretty easy.  If you want to examine the
contents of a PDF file you're better off using Postscript, Ghostscript
specifically, since PDF is essentially Postscript with a special
dictionary of commands.

                                        Ross Ridge



From S.Mientki-nospam at mailbox.kun.nl  Sat Jan  6 17:56:43 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sat, 06 Jan 2007 23:56:43 +0100
Subject: still struggling, howto use a list-element as a name ? Sory,
	hit send button to early
In-Reply-To: <441e$45a02246$d443bb3a$24795@news.speedlinq.nl>
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
	<45a01981$0$296$426a74cc@news.free.fr>
	<I_Unh.390$_B1.309@read3.inet.fi>
	<441e$45a02246$d443bb3a$24795@news.speedlinq.nl>
Message-ID: <bcf0b$45a0291e$d443bb3a$4323@news.speedlinq.nl>

Stef Mientki wrote:
> Jussi Salmela wrote:
>> Bruno Desthuilliers kirjoitti:
>>> Stef Mientki a ?crit :
>>>> In the example below, "pin" is an object with a number of properties.
>>>> Now I want
>>>> 1- an easy way to create objects that contains a number of these "pin"
>>>> 2- an multiple way to access these "pin", i.e.
>>>>         device.pin[some_index]
>>>>     device.some_logical_name
>>>> ad 1:
>>>> a dictionary (as "pinlist" in the example) seems a very 
>>>> convenient     way (from a viewpoint of the device creator).
>>>> As you can see in the "__init__" section this dictionary can easily 
>>>> be transported to the pin-objects.
>>>>
>>>> ad 2:
>>>> THAT's the problem: how do automate these lines "self.GND = 
>>>> self.pin[0]"
>>>>
>>>> I'm also in for other solutions.
>>>
>>> I'm afraid I don't understand your design (nor the domain FWIW). 
>> ditto
>>> <snip>
>>>
>>> But the whole thing still looks awfully convulted and kludgy to me, 
>>> and I suspect serious design flaws... Why don't you try and explain  
>>> your real problem, instead of asking how to implement what you 
>>> *think* is the solution ?
>> ditto
> 
> thank you all guys.
> I'm just doing some exercises in Python,
> and therefor I'm trying to rewrite some programs
> I've written in other languages into Python.
> 
> The first program I tried to convert was a MatLab program,
> which could almost be written identical in Python.
> Even with my little experience in Python,
> I can tell you that it could have been written in Python
> in a much better way, but I deliberately did not,
> to show other people who are familiar with MatLab.
> 
> The second example I'm now exercising with,
> is a simulator of (electrical) circuits,
> which I build in Delphi
>   http://oase.uci.kun.nl/~mientki/data_www/pic/jalss/jalss.html
> 
> 
> Sorry, pressed send button too soon, so here it continuous:

In this exercise, I don't attempt to write "beautiful" Python code,
but the first thing is to write a simple "user-interface" for non-Pythians.
I understand that standardization about naming conventions is important,
but the purpose here is to serve the user, who has to write and 
unerstand this,
therefore IORLW is in the domain always written in capitals,
spaces here makes it lot easier to compare the different actions,
in this domain we're used to 2 spaces etc.

  def IORLW(S):  S.Accu_ZERO ( S.Accu | S.lit [S.PC] )
  def ANDLW(S):  S.Accu_ZERO ( S.Accu & S.lit [S.PC] )
  def XORLW(S):  S.Accu_ZERO ( S.Accu ^ S.lit [S.PC] )
  def SUBLW(S):  S.AddLW     (~S.Accu + 1 )
  def ADDLW(S):  S.AddLW     ( S,Accu )


So to come back to my last question:
this is what the user has to do:
define devices with pins, and the actions what todo when input signals 
changes.

class LED (device):
  pinlist ={
  # pin    name         type     init-value   other-parameters
      1: ('Cathode',   _DIG_IN,   [],           _par2),
      2: ('Anode',     _DIG_OUT,  [],           _par33)
      }

  Status = {True:('On'), False:('Off')}

  def execute (self):
    old = self.On
    self.On = (~self.Cathode.Value & self.Anode.Value) > 0
    if self.On <> old : print self.Name, self.Status[self.On]

And now this looks quit  familiar,
although I miss the "with" statement of Delphi to make it even more 
readable ;-)
like this

class LED (device):
  pinlist ={
  # pin    name         type     init-value   other-parameters
      1: ('Cathode',   _DIG_IN,   [],           _par2),
      2: ('Anode',     _DIG_OUT,  [],           _par33)
      }

  Status = {True:('On'), False:('Off')}

  def execute (self):
    with self:
      old = On
      On = ( ~Cathode.Value & Anode.Value) > 0
      if On <> old : print Name, Status[On]


thanks again for all your wonderfull help,
cheers,
Stef Mientki


From deets at nospam.web.de  Tue Jan 16 05:46:55 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 16 Jan 2007 11:46:55 +0100
Subject: html + javascript automations = [mechanize + ?? ] or something
	else?
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
	<m3lkk3dznr.fsf@netmaster.kds.com.ua>
Message-ID: <513oovF1ib4g4U1@mid.uni-berlin.de>

> Up to my knowledge, there no way to test javascript but to fire up a
> browser.
> 
> So, you might check Selenium (http://www.openqa.org/selenium/) and its
> python module.

No use in that, as to be remote-controlled by python, selenium must be run
on the server-site itself, due to JS security model restrictions.

Diez


From weekender_ny at yahoo.com  Mon Jan 15 23:12:35 2007
From: weekender_ny at yahoo.com (John)
Date: 15 Jan 2007 20:12:35 -0800
Subject: html + javascript automations = [mechanize + ?? ] or something else?
Message-ID: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>


I have to write a spyder for a webpage that uses html + javascript. I
had it written using mechanize
but the authors of the webpage now use a lot of javascript. Mechanize
can no longer do the job.
Does anyone know how I could automate my spyder to understand
javascript? Is there a way
to control a browser like firefox from python itself? How about IE?
That way, we do not have
to go thru something like mechanize?

Thanks in advance for your help/comments,
--j



From NikitaTheSpider at gmail.com  Wed Jan 24 11:55:35 2007
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Wed, 24 Jan 2007 11:55:35 -0500
Subject: Regex for URL extracting
References: <1169655624.981833.29730@j27g2000cwj.googlegroups.com>
Message-ID: <NikitaTheSpider-0B72FC.11553524012007@news-server.nc.rr.com>

In article <1169655624.981833.29730 at j27g2000cwj.googlegroups.com>,
 "Johny" <python at hope.cz> wrote:

> Does anyone know about a good regular expression  for URL extracting?

Extracting URLs from what?

If it is HTML, then I'd look at some existing HTML parsing modules like 
Beautiful Soup and Barnes' HTMLData.

-- 
Philip
http://NikitaTheSpider.com/
Whole-site HTML validation, link checking and more


From hg at nospam.org  Thu Jan 18 11:44:44 2007
From: hg at nospam.org (hg)
Date: Thu, 18 Jan 2007 17:44:44 +0100
Subject: what can be used in a signal handler
References: <3zKrh.30692$sE7.26486@newsfe21.lga>
	<eontet$dbu$1@gemini.csx.cam.ac.uk>
Message-ID: <FDTrh.21215$cv2.14581@newsfe13.lga>

Nick Maclaren wrote:

> 
> In article <3zKrh.30692$sE7.26486 at newsfe21.lga>,
> hg <hg at nospam.org> writes:
> |> 
> |> I posted an equivalent question earlier ... but am still not sure:
> |> 
> |> I currently (under Linux) have a program that uses Queue.put
> |> (raw_input('')) in a signal handler and Queue.get() in the main/only
> |> thread.
> |> 
> |> It works but I want to know if it is legal / what type of synchro API I
> |> have the right to use in a signal handler.
> 
> Strictly, no and none.
> 
> C and POSIX's specifications of signal handling is a complete mess.
> ALL handling of ALL real signals is undefined behaviour, though few
> programmers realise that and POSIX depends on it.  As that would make
> all Unices (and Microsoft systems) unusable, you can reasonably assume
> that there is some signal handling that will work.
> 
> But what?  Which is where you came in.
> 
> The situation is that most things that seem to work do actually work,
> in some environments and under some circumstances.  You can never be
> sure when they will stop working, however, and all bets are off when
> you port signal handling code to a new system.  And, really but REALLY,
> do not mix it with very high levels of optimisation or rely on it
> being in any way thread safe.
> 
> I can't tell you whether the code of Queue is intended to work if an
> active Queue.get is interrupted by a signal which then does a Queue.put,
> but that is the sort of circumstance where things get very hairy.  Even
> if Python has code to enable that case, it won't be 100% reliable on all
> systems.
> 
> Sorry.  But that is the situation :-(
> 
> 
> Regards,
> Nick Maclaren.

Fair, I'll find a way around then.

Regards,

hg




From deets at nospam.web.de  Thu Jan 11 18:20:24 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 12 Jan 2007 00:20:24 +0100
Subject: Python nuube needs Unicode help
In-Reply-To: <1168550858.233814.292900@p59g2000hsd.googlegroups.com>
References: <1168550858.233814.292900@p59g2000hsd.googlegroups.com>
Message-ID: <50nv1uF1hje7oU1@mid.uni-berlin.de>

gheissenberger at gmail.com schrieb:
> HELP!
> Guy who was here before me wrote a script to parse files in Python.
> 
> Includes line:
> print u
> where u is a line from a file we are parsing.
> However, we have started recieving data from Brazil. If I open file to
> parse in VI, looks like:
> 
> <Utt id="3" transcribe="yes" audioRoot="A1"
> audio="313-20070102144528.wav" grammarSet="G3" rawText="n&#227;o"
> recValue="{data:CHOICE=NO;}" conf="970" rawText2="" conf2="0"
> transcribedText="n&#227;o" parsableText="n&#227;o"/
> 
> Clearly those "n&#227" are some non-Ascii characters, but how do I get
> print to understand that?
> 
> I keep getting:
> "UnicodeEncodeError: 'ascii' codec can't encode character u'\xe3' in
> position 40:
>  ordinal not in range(128)"
> 

Does the error happen at the

print u

line? If yes, what happens is that you try and print a unicode object. 
Which means that it has to be converted (actually the right term is 
encoded) to a byte-string. If you don't do that explicitely, it will be 
done implicitly, using the default encoding - which is ascii.

If you have non-ascii characters, you end up with the error you see.

What to do? Use something like this:

print u.encode('utf-8')

instead.

Diez


From garyjefferson123 at yahoo.com  Tue Jan 23 00:49:01 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: 22 Jan 2007 21:49:01 -0800
Subject: selective logger disable/enable
In-Reply-To: <1169442596.209314.162410@s34g2000cwa.googlegroups.com>
References: <1169190498.593059.238150@q2g2000cwa.googlegroups.com>
	<1169204564.348768.186900@38g2000cwa.googlegroups.com>
	<1169349399.938121.238430@38g2000cwa.googlegroups.com>
	<1169395276.181654.160810@a75g2000cwd.googlegroups.com>
	<1169437763.213781.163660@38g2000cwa.googlegroups.com>
	<1169442596.209314.162410@s34g2000cwa.googlegroups.com>
Message-ID: <1169531341.221067.205500@11g2000cwr.googlegroups.com>


Vinay Sajip wrote:
>
> BTW I would also advise reading PEP-282 to understand more about the
> logging approach.


You've been most helpful, Vinay.  The PEP section on Filters states
that I can do what I've been trying to do with filters, but doesn't
provide enough information to do it (or, at least, I'm too thick to
guess at how it would work by looking at the API and PEP and trying a
dozen different ways).  Luckily, the examples you point to from your
original package do provide enough info; log_test15.py held the key.

I still feel like it would be more intuitive if filters were inherited
down the hierarchy instead of having to go through the extra steps of
getting at the root handler first, but I'm sure there are good reasons
for not doing this.

One more question, is there any way to get the list of all named
loggers (from the Manager, perhaps)?  Or... maybe I don't need this,
either, as MatchFilter (log_test18.py) seems to do what I was thinking
I need the list of logger names for... most excellent.

Thanks,
Gary

BTW, the python logging module is one of the best readily available
loggers I've come across in any language.



From michael at mustun.ch  Sat Jan  6 09:43:05 2007
From: michael at mustun.ch (Michael M.)
Date: Sat, 06 Jan 2007 15:43:05 +0100
Subject: Python re expr from Perl to Python
Message-ID: <GzOnh.112$a81.91@nntpserver.swip.net>


In Perl, it was:


   ## Example: "Abc | def | ghi | jkl"
   ##       -> "Abc ghi jkl"
   ## Take only the text betewwn the 2nd pipe (=cut the text in the 1st 
pipe).
   $na =~ s/\ \|(.*?)\ \|(.*?)\ \|/$2/g;

   ## -- remove [ and ] in text
   $na =~ s/\[//g;
   $na =~ s/\]//g;
   # print "DEB: \"$na\"\n";


# input string
na="Abc | def | ghi | jkl [gugu]"
# output
na="Abc ghi jkl gugu"


How is it done in Python?


From maxerickson at gmail.com  Tue Jan 16 13:03:53 2007
From: maxerickson at gmail.com (Max Erickson)
Date: Tue, 16 Jan 2007 18:03:53 +0000 (UTC)
Subject: urllib2 and HTTPBasicAuthHandler
References: <45acf775$0$5070$ba4acef3@news.orange.fr>
Message-ID: <Xns98BA84E5AE44Fmaxericksongmailcom@80.91.229.5>

"m.banaouas" <banaouas.medialog at wanadoo.fr> wrote:

> Hi all,
> I started to use urllib2 library and HTTPBasicAuthHandler class
> in order to authenticate with a http server (Zope in this case).
> I don't know why but it doesn't work, while authenticating with
> direct headers manipulation works fine!
> 
...
> port':'8080','path':'manage','realm':'Zope'} 
>    url = '%(prot)s://%(host)s:%(port)s/%(path)s' % data
...

Are you certain that the realm on the server matches 'Zope'?

HTTPBasicAuthHandler uses the realm to look for the password, if the 
realm the server provides is different, urllib2 will respond as if it 
does not have a user/password.

If you are only doing one request, it isn't that big a deal; if you 
are doing many requests or want urllib2 to handle the response for 
other reseans, you can use a default realm, see the bottom of this 
example:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/305288

(The advantage of using a default rather than making sure the realm is 
correct is that it can change and you won't have to do anything)



max



From anthony.cutrone at gmail.com  Mon Jan 29 03:31:49 2007
From: anthony.cutrone at gmail.com (anthony.cutrone at gmail.com)
Date: 29 Jan 2007 00:31:49 -0800
Subject: Web File System
Message-ID: <1170059509.601069.153290@q2g2000cwa.googlegroups.com>

Hi group,

I have a development with a file system in Python, accessible from a 
graphic web application.

I mustn't use an NTFS or EXT3 system, because those are not adapted 
for my use. Indeed, I would like my system to be able to recover 
files, and get precedent versions. I also want it to index words 
contained in files, to search with these.

Files and folders have to be in an SQL database, mounted in ext3-like 
system. File would be identified by a single ID, and links with names 
should be connected on these IDs.

Somebody have already worked (in Python) about this kind of things ? 
is there a publicly available framework or toolkit ?

thanks



From gagsl-py at yahoo.com.ar  Sun Jan 21 09:40:57 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 21 Jan 2007 11:40:57 -0300
Subject: A solution to the MSVCRT vs MSVCR71 problem?
In-Reply-To: <45B3267A.80605@v.loewis.de>
References: <1169348867.369917.104970@m58g2000cwm.googlegroups.com>
	<mailman.2958.1169368253.32031.python-list@python.org>
	<45B3267A.80605@v.loewis.de>
Message-ID: <7.0.1.0.0.20070121113404.036150c8@yahoo.com.ar>

At Sunday 21/1/2007 05:38, Martin v. L?wis wrote:

>Gabriel Genellina schrieb:
> > This would only work, if runtime dll's were compatibles between them,
> > and they are not. You can't blindly redirect a call to msvcr71.__xyz to
> > msvcr80.__xyz and expect that to work magically - it may have a
> > different number of arguments, or different types, or even may not exist
> > anymore.
>
>Actually, the libraries *are* binary-compatible (on the ABI level). You
>just can't mix two libraries in a single program easily.

That's a good thing - but is this just by accident, or is documented somewhere?
I remember that I tried something like that in 
the past, and failed. (Perhaps earlier versions 
where not fully backwards compatible - or I didn't try hard enough that time).


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From bill.scherer at verizonwireless.com  Fri Jan  5 15:33:03 2007
From: bill.scherer at verizonwireless.com (Bill Scherer)
Date: Fri, 05 Jan 2007 15:33:03 -0500
Subject: Learning to program in Python
In-Reply-To: <NYOBGCEXSMTP20HNkjg0000841d@nyobgcexsmtp20.uswin.ad.vzwcorp.com>
References: <NYOBGCEXSMTP20HNkjg0000841d@nyobgcexsmtp20.uswin.ad.vzwcorp.com>
Message-ID: <459EB5FF.80801@verizonwireless.com>

jbchua wrote:

>Hello everybody.
>
>I am an Electrical Engineering major and have dabbled in several
>languages such as Python, C, and Java in my spare time because of my
>interest in programming. However, I have not done any practical
>programming because I have no idea where to get started. I taught
>myself these languages basically by e-tutorials and books. This makes
>me feel as if I don't really know how to implement these languages.
>Does anybody have any advice on where to start applying my limited
>knowledge practically in order to advance my learning?
>
>  
>
Given your major, I think you'll find Unum very handy:
    http://home.tiscali.be/be052320/Unum.html

It allows one to work with familiar terms naturally:

 >>> 1 / ( (2*pi) * (1*Mega*OHM) * (.1*Micro*F) )
1.59154943092 [1/s]
 >>>
(note that Unum doesn't provide the metric prefixes in this example, but 
thats easy enough to code oneself)


They have tutorial which you may find useful.


HTH,

Bill


From hg at nospam.org  Wed Jan 10 02:35:29 2007
From: hg at nospam.org (hg)
Date: Wed, 10 Jan 2007 08:35:29 +0100
Subject: maximum number of threads
References: <mailman.2531.1168438769.32031.python-list@python.org>
Message-ID: <DQ6ph.113451$gl2.72305@newsfe16.lga>

Jean-Paul Calderone wrote:

> On Wed, 10 Jan 2007 12:11:59 -0200, Felipe Almeida Lessa
> <felipe.lessa at gmail.com> wrote:
>>On 1/10/07, Laurent Pointal <laurent.pointal at limsi.fr> wrote:
>>>This is a system configurable limit (up to a maximum).
>>>
>>>See ulimit man pages.
>>>
>>>test
>>>
>>>         ulimit -a
>>>
>>>to see what are the current limits, and try with
>>>
>>>         ulimit -u 2000
>>>
>>>to modify the maximum number of user process (AFAIK each thread use a
>>>process entry on Linux)
>>
>>I don't think it's only this.
> 
> Indeed you are correct.  The actual limit you are hitting is the size
> of your address space.  Each thread is allocated 8MB of stack.  382
> threads consumes about 3GB of address space.  Even though most of this
> memory isn't actually allocated, the address space is still used up.  So,
> when you try to create the 383rd thread, the kernel can't find anyplace
> to put its stack.  So you can't create it.
> 
> Try reducing your stack size or reducing the number of threads you create.
> There's really actually almost no good reason to have this many threads,
> even though it's possible.
> 
>     exarkun at charm:~$ python Desktop/test.py
>     50
>     100
>     150
>     200
>     250
>     300
>     350
>     Exception raised: can't start new thread
>     
>     Biggest number of threads: 382
>     exarkun at charm:~$ ulimit -Ss 4096
>     exarkun at charm:~$ python Desktop/test.py
>     50
>     100
>     150
>     200
>     250
>     300
>     350
>     400
>     450
>     500
>     550
>     600
>     650
>     700
>     750
>     Exception raised: can't start new thread
>     
>     Biggest number of threads: 764
>     exarkun at charm:~$
>     
> Jean-Paul


Would increasing the swap size do it also then ?

hg



From michael at mustun.ch  Thu Jan  4 11:12:34 2007
From: michael at mustun.ch (Michael M.)
Date: Thu, 04 Jan 2007 17:12:34 +0100
Subject: code optimization (calc PI) / New Algorithme for PI
In-Reply-To: <1167926262.512546.209130@s80g2000cwa.googlegroups.com>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<slrneppql6.3v8.nick@irishsea.home.craig-wood.com>
	<We9nh.196$Je6.90@nntpserver.swip.net>
	<1167926262.512546.209130@s80g2000cwa.googlegroups.com>
Message-ID: <DH9nh.200$Je6.136@nntpserver.swip.net>

casevh at comcast.net wrote:

>>Yes, this "gmpy" sounds good for calc things like that.
>>But not available on my machine.
>>ImportError: No module named gmpy
> 
> 
> What type of machine?

Windoof with Cygwin.

> 
> The home page for gmpy is http://sourceforge.net/projects/gmpy/
> 
> I have Windows versions available at http://home.comcast.net/~casevh/
> 
> casevh
> 

If the binary works, I don't know. Maybe there is also a gmpy module 
already in Cygwin.


From gagsl-py at yahoo.com.ar  Thu Jan 18 09:42:35 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 18 Jan 2007 11:42:35 -0300
Subject: urllib2 and transfer-encoding = chunked
References: <1169108468.497013.228520@l53g2000cwa.googlegroups.com>
Message-ID: <eoo10v$pgf$1@sea.gmane.org>

<jdvolz at gmail.com> escribi? en el mensaje 
news:1169108468.497013.228520 at l53g2000cwa.googlegroups.com...
>I am having errors which appear to be linked to a previous bug in
> urllib2 (and urllib) for v2.4 and v2.5 of Python.  Has this been fixed?
> Has anyone established a standard workaround?  I keep finding old
> posts about it, that basically give up and say "well it's a known bug."
> Any help would be greatly appreciated.

Perhaps if you said what the supposed error is...

-- 
Gabriel Genellina 




From domma at procoders.net  Tue Jan 23 13:24:41 2007
From: domma at procoders.net (Achim Domma)
Date: Tue, 23 Jan 2007 19:24:41 +0100
Subject: Overloading assignment operator
Message-ID: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>

Hi,

I want to use Python to script some formulas in my application. The user 
should be able to write something like

A = B * C

where A,B,C are instances of some wrapper classes. Overloading * is no 
problem but I cannot overload the assignment of A. I understand that 
this is due to the nature of Python, but is there a trick to work around 
this?
All I'm interested in is a clean syntax to script my app. Any ideas are 
very welcome.

regards,
Achim


From hg at nospam.org  Thu Jan 11 03:49:50 2007
From: hg at nospam.org (hg)
Date: Thu, 11 Jan 2007 09:49:50 +0100
Subject: Newbie question: SMTP -> SQL Server
References: <1168529572.873867.207730@k58g2000hse.googlegroups.com>
Message-ID: <j0tph.33102$X97.7130@newsfe18.lga>

jrpfinch wrote:

> I have an externally-written piece of software that spits out emails
> using SMTP (a few hundred per hour) and I would like to dump the
> content of them in an MS SQL Server database.
> 
> I have barely used Python before but it looks as if it could do the
> job.  I have no experience with mail agents.  My starting point is this
> recipe:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440690
> 
> I know that there are various libraries that can connect to MS SQL
> server and I am going to research these.
http://sourceforge.net/projects/mysql-python
> 
> I have two questions:
> 
> i)  Does this sound like an efficient way of transferring data to the
> database?
Not certain I understand

> ii)  Looking through the Python documentation, I cannot see a way to
> set the password on the SMTP server.  I would like to have a password -
> does anyone know how to use the recipe above to set one?

s = smtplib.SMTP()
....
s.login(...,'password')
> 
> Any other useful nudges in the right direction appreciated.
> 
> Many thanks
> 
> Jon

hg




From steve at REMOVE.THIS.cybersource.com.au  Mon Jan  1 00:14:13 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 01 Jan 2007 16:14:13 +1100
Subject: I want to see all the variables
References: <s57lh.335$c46.311@newsfe05.lga> <45952426.1080800@websafe.com>
	<pan.2006.12.29.16.35.00.363156@REMOVE.THIS.cybersource.com.au>
	<8yelh.90$Q4.82@newsfe02.lga>
	<pan.2006.12.29.22.46.14.436601@REMOVE.THIS.cybersource.com.au>
	<FPylh.22$eq5.11@newsfe02.lga>
	<459722fc$0$30313$9b4e6d93@newsspool1.arcor-online.net>
	<pan.2006.12.31.02.56.19.358717@REMOVE.THIS.cybersource.com.au>
	<2v0hp2tbk8uq2pbqi6874b4tidbck2tpga@4ax.com>
Message-ID: <pan.2007.01.01.05.14.12.260857@REMOVE.THIS.cybersource.com.au>

On Sun, 31 Dec 2006 19:48:55 -0800, Tom Plunket wrote:

> Steven D'Aprano wrote:
> 
>> What does the author of the original class know about *my* needs and
>> requirements?
> 
> The only thing that the original class author might know is that mucking
> with data marked private may well cause problems, and hiding it
> therefore prevents those problems.

Sure. That's the risk I take when I muck about with somebody else's
private attributes.


>> It may turn out that accessing his "private" attributes is exactly what
>> I need to solve my problem.
> 
> It may also turn out that you /think/ that's what you need to do, but
> actually need to do something different.

And how is that different from *any* programming task? I might think I
need a binary tree, when all I really need is a simple list. An error is
an error, whether it is with a public API or a private one. 


> E.g. it may well be possible to access the bytes on the disk that holds
> your database directly, and that may be "easier" than going through the
> db API, but doing so may also be highly prone to error.

No, I doubt it is "easier" -- but if I'm programming a database recovery
tool that fixes corrupted databases because the db vendor's supplied
tool is broken or non-existent, that might be exactly what I need to do.


>> I'm with the Python philosophy on this one: post all the "Don't Touch
>> This" warning signs you like, but if somebody really wants to access my
>> private attributes, to do something I never even imagined, they should
>> be allowed to.
> 
> You are allowed to.  Have you been following the thread?  Your answer's
> been mentioned several times.

Yes, mostly by me. Do try to keep up.


> At the same time, you should ponder very
> carefully the reasons why the original author deemed it important to
> make those attributes private in the first place.

In my experience, it is mostly because they come from
bondage-and-domination languages where it is expected that everything is
private except for a small, carefully chosen public API, rather than from
languages like Python that encourages openness and a philosophy of "we're
all adults here".

I wonder how many double-underscore "private" attributes are used in the
Python standard library? That should give you an idea of "best practice"
use of private attributes in Python.



-- 
Steven.



From tsuraan at gmail.com  Mon Jan  8 11:13:42 2007
From: tsuraan at gmail.com (tsuraan)
Date: Mon, 8 Jan 2007 10:13:42 -0600
Subject: Suitability for long-running text processing?
In-Reply-To: <c2701f5c0701080801w4d3c378elf901db19610a2e9e@mail.gmail.com>
References: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>
	<c2701f5c0701080801w4d3c378elf901db19610a2e9e@mail.gmail.com>
Message-ID: <84fb38e30701080813k1be616fch6d01922fb7a92fc5@mail.gmail.com>

> I just tried on my system
>
> (Python is using 2.9 MiB)
> >>> a = ['a' * (1 << 20) for i in xrange(300)]
> (Python is using 304.1 MiB)
> >>> del a
> (Python is using 2.9 MiB -- as before)
>
> And I didn't even need to tell the garbage collector to do its job. Some
> info:


It looks like the big difference between our two programs is that you have
one huge string repeated 300 times, whereas I have thousands of
four-character strings.  Are small strings ever collected by python?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070108/634808c4/attachment.html>

From martin.witte at gmail.com  Sat Jan  6 17:53:04 2007
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 6 Jan 2007 14:53:04 -0800
Subject: Doing date/time + TZ math in python
In-Reply-To: <459ee41c$0$4805$88260bb3@free.teranews.com>
References: <459ee41c$0$4805$88260bb3@free.teranews.com>
Message-ID: <1168123983.983339.163010@s80g2000cwa.googlegroups.com>


Joshua J. Kugler wrote:
> I've read docs (datetime, time, pytz, mx.DateTime), googled, and
> experimented.  I still don't know how to accomplish what I want to
> accomplish.
>
> I'm loading up a bunch of date/time data that I then need to do math on to
> compare it to the current date/time.  I can get the current time easily
> enough:
>
> currentTime = datetime.datetime.now(pytz.timezone('America/Anchorage'))
>
> Then, I want to import data/time pairs that are in "%Y-%m-%d %H:%M:%S"
> format.
>
> So, I do:
>
> For each loop, extract time data, blah, blah, then:
> readingTime = datetime.datetime(rYr, rMo, rDay, rHr, rMin, rSec,
> tzinfo=pytz.timezone('America/Anchorage'))
>
> The problem is, how do I create a datetime object and tell it that it's
> America/Anchorage *daylight savings time* instead of whatever the system is
> currently set at?  pytz only has America/Anchorage, and I saw no way to
> tell it explicitly that the timezone is in Daylight instead of Standard
> time (e.g. using AKST vs. AKDT for the time zone).
>
> I'm sure there is a way to do it, and I'm sure it's quite simple, but it
> hasn't jumped out at me yet.  Is there a module that I haven't seen that
> would be better suited for this?
>
> Thanks!
>
> j
>
> --
> Joshua Kugler
> Lead System Admin -- Senior Programmer
> http://www.eeinternet.com
> PGP Key: http://pgp.mit.edu/  ID 0xDB26D7CE
>
> --
> Posted via a free Usenet account from http://www.teranews.com

It looks like3 you're 9 hours in this example:
http://docs.python.org/lib/datetime-tzinfo.html, see e.g.
http://www.worldtimezone.com/index12.php



From jf.pieronne at laposte.net  Fri Jan 26 02:13:47 2007
From: jf.pieronne at laposte.net (=?ISO-8859-1?Q?Jean-Fran=E7ois_Pi=E9ronne?=)
Date: Fri, 26 Jan 2007 08:13:47 +0100
Subject: Module for SVG?
In-Reply-To: <mailman.3164.1169751502.32031.python-list@python.org>
References: <mailman.3164.1169751502.32031.python-list@python.org>
Message-ID: <45b9aa2f$0$30992$426a74cc@news.free.fr>

Sebastian Bassi a ?crit :
> Hello,
> 
> I found http://www2.sfk.nl/svg as a Python module for writing SVG.
> Last update was in 2004 and I am not sure if there is something
> better.
> Any recommendation for generating SVG graphics?

I have ported to Python the Ruby SVG graph generation library
http://www.germane-software.com/software/SVG/SVG::Graph/
some examples:
http://www.germane-software.com/software/SVG/SVG::Graph/screenshots.html

If you have some interest let me know.


JF


From schpok at gmail.com  Sun Jan  7 21:59:53 2007
From: schpok at gmail.com (schpok at gmail.com)
Date: 7 Jan 2007 18:59:53 -0800
Subject: Module to read svg
Message-ID: <1168225193.883421.185140@s80g2000cwa.googlegroups.com>

I'm looking for a module to load an SVG document so that I can read out
its contents in some graphics-centric way. For example, path elements
store their vertices in a long attribute string you need to parse. An
ideal module would get me these vertices in a list.

SVGdraw seems to only write, but not read.

I'm interested in a pretty simple subset of the actual spec, where SVG
Tiny is sufficient. W3C's python spec seems just what I want:
http://www.w3.org/TR/SVGMobile12/python-binding.html

Does anyone know if there's an actual free implementation of this?
Before I start salvaging out code from Skencil, is there anything else
I might look at?

Thanks,

Schpok



From wd.jonsson at gmail.com  Wed Jan 24 08:36:19 2007
From: wd.jonsson at gmail.com (wd.jonsson at gmail.com)
Date: 24 Jan 2007 05:36:19 -0800
Subject: Missing .dlls when installing PyQt!? :(
Message-ID: <1169645779.368746.157750@l53g2000cwa.googlegroups.com>

Hello!

I must be doing something wrong here because I'm getting all these
missing .dll messages after installing PyQT. This is what I've done (no
step excluded):

1. Fresh installation of Python25
2. I run the PyQt-gpl-4.1.1-Py2.5-Qt4.2.2.exe file which should include
SIP
3. I run the qt-win-opensource-4.2.2-mingw.exe file
4. I try to launch the C:\Program
Files\PyQt4\examples\tools\qtdemo\qtdemo.pyw file

Result:
Error message says: Can't find mingwm10.dll

After searching for the file I found it in the C:\Qt\4.2.2\bin
directory. I copied the dll to the windows dir just to run in to the
next missing dll error (QtCore4.dll) which is also located in the same
directory. What have I missed? I've been trying to install QT for 6
hours now...

Gah, please help! :)



From fredrik at pythonware.com  Thu Jan 25 04:32:49 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 25 Jan 2007 10:32:49 +0100
Subject: Subclassing cElementTree.XMLTreeBuilder
References: <1169695233.737016.95950@a75g2000cwd.googlegroups.com>
Message-ID: <ep9tg2$2s4$2@sea.gmane.org>

"mukappa" wrote:

> Is it possible to subclass cElementTree.XMLTreeBuilder?

no, it's a factory function.  if you need to extend it, you'll have to wrap it.  but
I'm not sure I see the use case; what is it you're trying to do here?

</F> 





From bearophileHUGS at lycos.com  Fri Jan 19 08:04:01 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 19 Jan 2007 05:04:01 -0800
Subject: Iterator length
In-Reply-To: <pan.2007.01.19.11.36.29.99822@REMOVE.THIS.cybersource.com.au>
References: <1169162762.997894.180320@q2g2000cwa.googlegroups.com>
	<1169167258.553202.190130@m58g2000cwm.googlegroups.com>
	<1169168139.350836.79790@s34g2000cwa.googlegroups.com>
	<pan.2007.01.19.11.36.29.99822@REMOVE.THIS.cybersource.com.au>
Message-ID: <1169211840.951796.87080@q2g2000cwa.googlegroups.com>

Steven D'Aprano:
> > s = "aaabbbbbaabbbbbb"
> > from itertools import groupby
> > print [(h,leniter(g)) for h,g in groupby(s)]
>
> s isn't an iterator. It's a sequence, a string, and an iterable, but not
> an iterator.

If you look better you can see that I use the leniter() on g, not on s.
g is the iterator I need to compute the len of.


> I hope you know what sequences and strings are :-)

Well, I know little still about the C implementation of CPython
iterators :-)

But I agree with the successive things you say, iterators may be very
general things, and there are too many drawbacks/dangers, so it's
better to keep leniter() as a function separated from len(), with
specialized use.

Bye and thank you,
bearophile



From nmm1 at cus.cam.ac.uk  Wed Jan 24 12:12:19 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 24 Jan 2007 17:12:19 GMT
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
Message-ID: <ep841j$anu$1@gemini.csx.cam.ac.uk>


In article <mailman.3092.1169657938.32031.python-list at python.org>,
"Carl J. Van Arsdall" <cvanarsdall at mvista.com> writes:
|> Hey everyone, I have a question about python threads.  Before anyone 
|> goes further, this is not a debate about threads vs. processes, just a 
|> question.
|> 
|> With that, are python threads reliable?  Or rather, are they safe?  I've 
|> had some strange errors in the past, I use threading.lock for my 
|> critical sections, but I wonder if that is really good enough.
|> 
|> Does anyone have any conclusive evidence that python threads/locks are 
|> safe or unsafe?

Unsafe.  They are built on top of unsafe primitives (POSIX, Microsoft
etc.)  Python will shield you from some problems, but not all.

There is precious little that you can do, because the root cause is
that the standards and specifications are hopelessly flawed.


Regards,
Nick Maclaren.


From pierre at saiph.com  Tue Jan 30 10:49:01 2007
From: pierre at saiph.com (Imbaud Pierre)
Date: Tue, 30 Jan 2007 16:49:01 +0100
Subject: data design
In-Reply-To: <1170169714.066396.227860@s48g2000cws.googlegroups.com>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
	<1170169714.066396.227860@s48g2000cws.googlegroups.com>
Message-ID: <45bf68f8$0$30987$426a74cc@news.free.fr>

Szabolcs Nagy a ?crit :
>>The lazy way to do this: have modules that initialize bunches of
>>objects, attributes holding the data: the object is somehow the row of
>>the "table", attribute names being the column. This is the way I
>>proceeded up to now.
>>Data input this way are almost "configuration data", with 2 big
>>drawbacks:
>>  - Only a python programmer can fix the file: this cant be called a
>>    configuration file.
>>  - Even for the author, these data aint easy to maintain.
>>
>>I feel pretty much ready to change this:
>>- make these data true text data, easier to read and fix.
>>- write the module that will make python objects out of these data:
>>the extra cost should yield ease of use.
>>
>>2 questions arise:
>>- which kind of text data?
>>     - csv: ok for simple attributes, not easy for lists or complex
>>     data.
>>     - xml: the form wont be easier to read than python code,
>>       but an xml editor could be used, and a formal description
>>       of what is expected can be used.
>>- how can I make the data-to-object transformation both easy, and able
>>   to spot errors in text data?
>>
>>Last, but not least: is there a python lib implementing at least part
>>of this dream?
> 
> 
> there is a csv parser and multiple xml parsers in python (eg 
> xml.etree)
I used both. both are ok, but only bring a low layer parsing.
> also there is a ConfigParser module (able to parse .ini 
> like config files)
Used this years ago, I had forgotten. Another fine data text format.
> 
> i personally like the python module as config file the most
> 
> eg if you need a bunch of key-value pairs or lists of data:
> * python's syntax is pretty nice (dict, tuples and lists or just 
> key=value)
But only python programmer editable!
> * xml is absolutely out of question
> * csv is very limited
> * .ini like config file for more complex stuff is not bad but then you 
> can use .py as well.
> 

Thanks a lot for your advices.


From gagsl-py at yahoo.com.ar  Fri Jan 19 20:15:22 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 22:15:22 -0300
Subject: OT Annoying Habits (Was: when format strings attack)
In-Reply-To: <2BBAEE949D384D40A2B851287ADB6A4304595A9C@eugsrv400.psc.psc
	net.com>
References: <2BBAEE949D384D40A2B851287ADB6A4304595A9C@eugsrv400.psc.pscnet.com>
Message-ID: <7.0.1.0.0.20070119205257.033b9310@yahoo.com.ar>

At Friday 19/1/2007 18:43, Carroll, Barry wrote:

>Secondly, can someone point me to the Standard Usenet Convention that
>mandates against top-posting.  This is not sarcasm; I would really like
>to see it.

There are some guidelines, like RFC 1855 (not a real standard, or 
enforced in any way):
http://www.faqs.org/ftp/rfc/rfc1855.txt
"If you are sending a reply to a message or a posting be sure you
       summarize the original AT THE TOP OF THE MESSAGE, or include just
       enough text of the original to give a context (...) But do not 
include the entire original!" (capitals added by me).

>You see, I recently returned to Usenet after a LONG absence.
>When I was last a regular Usenet citizen the Internet was new, GUI
>interfaces were experimental and the World Wide Web didn't exist yet.
>Newsreader software was text-based.  Top-posting was the common
>practice, because it was the most convenient: you didn't have to page
>through an arbitrarily large number of messages, most of which you'd
>already read umpteen times, to get to the new stuff you were interested
>in.

Really? Top posting a common practice? I'm not a youngster either and 
I've never seen top posting as a *norm* but an exception.
Old newsreaders had a new/quoted ratio, and enforced it to be rather 
high - so it was not easy to forget to trim the quoted text.
http://www.i-hate-computers.demon.co.uk/quote.html
Digging a bit one can find some old recommendations, like the Big 
Dummy's Guide to the Internet (1993):
http://www.cs.indiana.edu/docproject/bdgtti/bdgtti_2.html
Or people puzzled on how this works:
http://groups.google.com/group/news.newusers.questions/browse_thread/thread/a75b1f4cfe470276/b38f62fc633db61e


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From arkanes at gmail.com  Mon Jan  8 13:12:52 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 8 Jan 2007 12:12:52 -0600
Subject: Why less emphasis on private data?
In-Reply-To: <pjvoh.192$cQ2.1@read3.inet.fi>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
	<%Isoh.22447$X97.12337@newsfe18.lga>
	<slrneq4nqc.k8.horpner@FIAD06.norwich.edu>
	<pjvoh.192$cQ2.1@read3.inet.fi>
Message-ID: <4866bea60701081012m7698b60fyd92cc005a5fe83a2@mail.gmail.com>

Private data in the C++ and Java OO worlds is so taught so much and
emphasized so often that people have started thinking of it as being
desirable for its own sake. But the primary motivation for it grew out
of the need to maintain compatible interfaces. These languages rely on
a great deal of shared information between provides and clients of
interfaces in order to work correctly - public/private interfaces are
simply a reflection of that requirement (and the fact that your
clients still need to see the stuff you declare as private is an
example of a leak in that abstraction).

Python doesn't have these problems, so the only use for private
information is to warn your clients away from access to certain names.
There's no need for compiler enforcement of that, as a convention is
just as effective.

The remaining arguments are generally outgrowths of "but my code is
SECRET", which just isn't true in general, even less true of Python,
and not really a healthy attitude anyway.


From vithi99 at hotmail.com  Mon Jan 15 13:53:26 2007
From: vithi99 at hotmail.com (vithi)
Date: 15 Jan 2007 10:53:26 -0800
Subject: How to write code to get focuse the application which is open
	from server
In-Reply-To: <m%Oqh.10311$pQ3.45@newsread4.news.pas.earthlink.net>
References: <1168143871.536432.252010@v33g2000cwv.googlegroups.com>
	<45a0dae2$0$8948$4c368faf@roadrunner.com>
	<1168837895.073936.270330@11g2000cwr.googlegroups.com>
	<m%Oqh.10311$pQ3.45@newsread4.news.pas.earthlink.net>
Message-ID: <1168887206.135633.182600@s34g2000cwa.googlegroups.com>

Dennis,
I am sorry that was a typing error. I try like that
app.Print.OK.Click() but it was not working. The printer window was not
IdentifiedIs their any method I can use to achive the same goal. How
the window title was used as class name?. Could you please help me to
solve this problem.
thanks
this is the error meassage

Traceback (most recent call last):
  File "C:\Python24\test1.py", line 10, in -toplevel-
    app.Print.Ok.CloseClick()
  File "c:\python24\pywinauto\pywinauto\application.py", line 237, in
__getattr__
    ctrls = _resolve_control(
  File "c:\python24\pywinauto\pywinauto\application.py", line 854, in
_resolve_control
    ctrl = _get_ctrl(criteria)
  File "c:\python24\pywinauto\pywinauto\application.py", line 622, in
_get_ctrl
    dialog = controls.WrapHandle(
  File "c:\python24\pywinauto\pywinauto\findwindows.py", line 62, in
find_window
    windows = find_windows(**kwargs)
  File "c:\python24\pywinauto\pywinauto\findwindows.py", line 177, in
find_windows
    windows = findbestmatch.find_best_control_matches(
  File "c:\python24\pywinauto\pywinauto\findbestmatch.py", line 483, in
find_best_control_matches
    raise MatchError(items = name_control_map.keys(), tofind =
search_text)
MatchError: Could not find 'Print' in '['', u'Transparent Windows
Client0', u'Transparent Windows Client2', u'Transparent Windows
Client1', u'Print - \\\\Remote', u'Transparent Windows Client', u'Print
- \\\\RemoteTransparent Windows Client']'

This is the code
import sys
import time
import application
app = application.Application()
qi=app.window_(title_re = ".*ArcView.*")
time.sleep(2)
qi.TypeKeys("%FP")
time.sleep(2)

app.Print.Ok.CloseClick()


Dennis Lee Bieber wrote:
> On 14 Jan 2007 21:11:35 -0800, "vithi" <vithi99 at hotmail.com> declaimed
> the following in comp.lang.python:
>
> >
> > my code goes like that
>
> 	"goes like"?  Don't type similarities from memory -- cut&paste the
> actual code (or, preferably, a stripped down version that you've
> actually run) that shows the behavior in question.
>
> > app=application.Application()
> > qi = app.window_(title_re = ".*arcMap.*")
> > qi.TypeKeys("%FP")
> > app,Print.OK.Click()
> >
> 	And what is that last line supposed to be doing. "app,anything" is
> two separate objects: an application object, and something called Print
> with an attribute called OK which itself has a method called Click
>
> 	I suspect, at a minimum, that last line is supposed to be
> 
> app.Print.OK.Click()
>    ^	period, not



From larry.bates at websafe.com  Thu Jan 11 18:33:17 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 11 Jan 2007 17:33:17 -0600
Subject: Newbie question: SMTP -> SQL Server
In-Reply-To: <mailman.2585.1168533856.32031.python-list@python.org>
References: <1168529572.873867.207730@k58g2000hse.googlegroups.com>	<j0tph.33102$X97.7130@newsfe18.lga>	<1168531934.015865.177100@i56g2000hsf.googlegroups.com>
	<mailman.2585.1168533856.32031.python-list@python.org>
Message-ID: <45A6C93D.4060605@websafe.com>

Steve Holden wrote:
> jrpfinch wrote:
>> Thank you.  I have just realised I completely misunderstand how SMTP
>> servers work.  From what I can tell, when you run the cookbook script
>> it listens locally on port 8025.
>>
>> You then have to configure a Linux (in my case) account with a username
>> and password so my external piece of software (on another Windows
>> machine) can log in and use the SMTP server.
>>
>> Then I write the some code in the cookbook example to redirect any mail
>> content to the MS SQL server database.
>>
>> Note that the external piece of software can only talk SMTP - this is
>> why I am having to develop this script.
>>
>> Does this sound sensible?  Any tips on how to configure my Linux box (I
>> don't have much experience with Linux either)?
>>
>> Many thanks
>>
>> Jon
>>
> Presumably you can configure the external piece of software at least to
> the extent of setting the email address it delivers to?
> 
> In that case it will be *much* simpler to set up an account on a mail
> server to receive these emails. That way the server will be available
> whenever the SMTP-based sender wants or needs to send mail, and you can
> use Python to collect the emails in batched using the POP protocol, as a
> client.
> 
> Once you receive the email messages then yes, it's perfectly practical
> to save the content in a SQL server database. mxODBC is one possible
> driver package (though it requires you to purchase a license for
> commercial use), and I seem to remember there's another one called
> adodbapi that is open source. There are almost certainly others, but
> it's a while since I used SQL Server with Python.
> 
> regards
>  Steve

Good advice.

BTW-You can use dbi and odbc modules to work with SQL server without
purchasing anything.


From fdelente at mail.cpod.fr  Sat Jan 27 02:22:15 2007
From: fdelente at mail.cpod.fr (Fabrice DELENTE)
Date: 27 Jan 2007 07:22:15 GMT
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
	<45ba50c7$0$31432$426a74cc@news.free.fr>
	<slrnerks72.jc.horpner@FIAD06.norwich.edu>
	<12rl5mq4nnqoea0@corp.supernews.com>
Message-ID: <45bafda7$0$2417$426a74cc@news.free.fr>

My system is Linux, and the distribution is Slackware 10.1.

I have

/lib/libncurses.so.5.4
/lib/libncursesw.so.5.4

so I even have the wide-chars version available. Any hint on the python
configuration? I didn't find any function that would allow the unrestricted
display of 8-bit chars.

-- 
Fabrice DELENTE


From dantonio at iasi.cnr.it  Fri Jan  5 06:51:12 2007
From: dantonio at iasi.cnr.it (Fulvio D'Antonio)
Date: Fri, 5 Jan 2007 12:51:12 +0100
Subject: CPU management
Message-ID: <00ce01c730bf$cca10560$a5059296@IBM75CFA6491AB>

Hello everybody,
I usally develop a lot of expensive (in terms of CPU usage) algorithms. I would like to develop something that allows my application to run quietly all day long with a little CPU usage, so that I can work in the meanwhile!
I was wondering if there is a way to limit the CPU usage: e.g. 10% instead of 100%, or to let the algorithm to be resumed only when the CPU usage changes.

I think these kind of things are called "resource management". So, are there facilities for this in Python=


I'm running Python2.4 on Windows XP.

Thank you for your help.


Fulvio
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070105/737de92b/attachment.html>

From bignose+hates-spam at benfinney.id.au  Thu Jan 18 20:22:04 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 19 Jan 2007 12:22:04 +1100
Subject: Determining when a file is an Open Office Document
References: <eop5ci$et5$1@solaris.cc.vt.edu>
Message-ID: <87mz4f6car.fsf@benfinney.id.au>

tubby <tubby at bandaheart.com> writes:

> Silly question, but here goes... what's a good way to determine when
> a file is an Open Office document? I could look at the file
> extension, but it seems there would be a better way.

Yes, the name of a file may be useful for communicating with humans
about that file's intended use, but is a lousy, unreliable way to make
a definite statement about the actual contents of the file.

The Unix 'file' command determines the type of a file by its contents,
not its name. This functionality is essentially a database of "magic"
byte patterns mapping to file types, and is provided by a library
called "libmagic", distributed with most GNU/Linux distributions.

    <URL:http://packages.debian.org/testing/source/file>

There is a Python interface to the "magic" functionality. It's in
Debian; I'm not sure if it's part of the "magic" code base, or written
separately to interface with it. Either way, you can get the source
for those packages and find out more.

    <URL:http://packages.debian.org/unstable/python/python-magic>

-- 
 \         "If life deals you lemons, why not go kill someone with the |
  `\  lemons (maybe by shoving them down his throat)."  -- Jack Handey |
_o__)                                                                  |
Ben Finney



From timr at probo.com  Fri Jan 19 03:42:10 2007
From: timr at probo.com (Tim Roberts)
Date: Fri, 19 Jan 2007 08:42:10 GMT
Subject: How to read and write huge binary files
References: <1169136850.518228.103360@l53g2000cwa.googlegroups.com>
Message-ID: <p011r21i4if66oob7vu403jdsrukr1kih7@4ax.com>

"Lad" <python at hope.cz> wrote:
>
>What is a good  way to read binary data from HUGE  file and write  it
>to another file?

How huge?  I regularly process 100-megabyte MPEG files in Python, both by
reading the whole thing in as a string, and by using "mmap" to map the file
into memory.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From gnewsg at gmail.com  Wed Jan 17 08:29:47 2007
From: gnewsg at gmail.com (billie)
Date: 17 Jan 2007 05:29:47 -0800
Subject: 2.3-2.5 what improved?
In-Reply-To: <eol0qn$kvj$1@news.albasani.net>
References: <mailman.2817.1169029744.32031.python-list@python.org>
	<eol0qn$kvj$1@news.albasani.net>
Message-ID: <1169040587.340057.11040@m58g2000cwm.googlegroups.com>


robert wrote

> Robin Becker wrote:
> > A large cgi based web Python-2.3 application needs to be speed improved.
> > experiments show the following under reasonable testing (these are 2
> > second reportlab pdf productions)
> >
> > 1) 2.3 --> 2.5 improvement small 1-2%
> > 2) cgi --> fcgi improvement medium 10-12%
> >
> > I sort of remember claims being made about 2.5 being 10% faster than
> > 2.4/2.3 etc etc. Can anyone say where the speedups were? Presumably we
> > have a lot of old cruft that could be improved in some way eg moving
> > loops into comprehensions, using iterator methods etc. Are those sort of
> > things what we should look at?
>
> Python 2.5 became quite fat. For bare CGI the Python load/init
> time eats all improvements. Smaller scripts even loose lot of speed.
> I still like Python 2.3 for many other reasons for many
> applications - especially for CGI's, on Windows, for deployable
> apps, GUI's etc. because the fat coming with Python 2.4 is not
> balanced by necessary goods - mostly just fancy things.

What do you mean? Fat of libraries or fat itself?
I tought that 2.5 was faster than precedent versions! :-\



From cbc at unc.edu  Thu Jan 18 11:14:13 2007
From: cbc at unc.edu (Chris Calloway)
Date: Thu, 18 Jan 2007 11:14:13 -0500
Subject: Zope 3 Boot Camp and Sprint registration open
Message-ID: <45af9ce4_3@news.unc.edu>

The Triangle (NC) Zope and Python Users Group invites you to register 
for Camp 5 and the BBQ Sprint:

http://trizpug.org/boot-camp/camp5/

This is a Zope 3 boot camp followed by a Plone 3 sprint. The boot camp 
is taught by Philipp von Weitershausen, author of Web Component 
Development with Zope 3. The training has previously only been offered 
in Europe and is now available in North America for the first time. The 
sprint includes several sponsored and invited sprinters.

TriZPUG hopes you will participate in Camp 5 in Chapel Hill, NC.

Camp 5: Saturday March 10 - Tuesday March 13, 2007
BBQ Sprint: Wednesday March 14 - Saturday March 17, 2007

-- 
Sincerely,

Chris Calloway
http://www.seacoos.org
office: 332 Chapman Hall   phone: (919) 962-4323
mail: Campus Box #3300, UNC-CH, Chapel Hill, NC 27599


From tpawley at gmail.com  Tue Jan  9 04:56:44 2007
From: tpawley at gmail.com (Torabisu)
Date: 9 Jan 2007 01:56:44 -0800
Subject: General Question About Python
In-Reply-To: <1168254451.098796.144790@42g2000cwt.googlegroups.com>
References: <1168254451.098796.144790@42g2000cwt.googlegroups.com>
Message-ID: <1168336603.962731.5470@11g2000cwr.googlegroups.com>

I think the best I've heard is, "Programming in Python is like writing
poetry".

Its really a beautiful language, so simple, short, powerful and to the
point.

We use it in conjunction with Django to implement a web based device
management solution for our products.

We've also written a multi-threaded gateway / modem pool server that
assists us with data calls, sms'ing, and gprs based communication.

Its quite weird, we're looking for Python skills but are battling to
find at the moment...  Normally Python on its own will probably not
land you a job, but the last two companies I've worked for are doing
indepth Python development, so hopefully the tables are turning a bit.

Enteng wrote:
> To those who program in python, what programs do you do?
> Also what community projects are you involved in(OSS probably)?
> Will mastering the language land me a job?
>
> I'm thinking about learning the language as a hobby. Just curious :)



From horpner at yahoo.com  Tue Jan 16 10:01:19 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 16 Jan 2007 16:01:19 +0100
Subject: Regular expressions question
References: <1168947810.175793.228620@51g2000cwl.googlegroups.com>
	<Xns98BA7A00DDBC0duncanbooth@127.0.0.1>
	<1168957361.204348.30080@s34g2000cwa.googlegroups.com>
	<slrneqpp4e.r8.horpner@FIAD06.norwich.edu>
	<1168958674.976563.91260@l53g2000cwa.googlegroups.com>
Message-ID: <slrneqpqam.r8.horpner@FIAD06.norwich.edu>

On 2007-01-16, Victor Polukcht <vpolukcht at gmail.com> wrote:
> On Jan 16, 5:40 pm, Neil Cerutti <horp... at yahoo.com> wrote:
>> On 2007-01-16, Victor Polukcht <vpoluk... at gmail.com> wrote:
>>
>> > Actually, i'm trying to get the values of first field (Global) , fourth
>> > (200, 4), and fifth (100%) and sixth (100%).
>>
>> > Everything except fourth is simple.
>> >>> g = "Global             etsi3  *   4 ok     30 100% 100% Outgoing"
>> >>> import re
>> >>> r = re.search('\*\s+(\d+)', g)
>> >>> r.group()
>> '*   4'
>> >>> r.group(1)'4'
>
> The same regular expression should work for another string (with *200).

Sorry about that. It should have been:

r = re.search('\*\s*(\d+)', g)

-- 
Neil Cerutti


From melih.onvural at gmail.com  Mon Jan 29 15:44:07 2007
From: melih.onvural at gmail.com (Melih Onvural)
Date: 29 Jan 2007 12:44:07 -0800
Subject: Executing Javascript, then reading value
Message-ID: <1170103447.839304.44900@v33g2000cwv.googlegroups.com>

I need to execute some javascript and then read the value as part of a 
program that I am writing. I am currently doing something like this:

import htmllib, urllib, formatter

class myparser(htmllib.HTMLParser):
	insave = 0
	def start_div(self, attrs):
		for i in attrs:
			if i[0] == "id" and i[1] == "pr":
				self.save_bgn()
				self.insave = 1

	def end_div(self):
		if self.insave == 1:
			print self.save_end()
		self.insave = 0

parser = myparser(formatter.NullFormatter())

#def getPageRank(self, url):
try:
	learn_url = "http://127.0.0.1/research/getPageRank.html?q=http://
www.yahoo.com&"
	pr_url = urllib.urlopen(learn_url)
	parser.feed(pr_url.read())
except IOError, e:
	print e

but the result is the javascript function and not the calculated 
value. Is there anyway to get the javascript to execute first, and 
then return to me the value? thanks in advance,

Melih Onvural



From ivoras at fer.hr  Tue Jan  2 09:53:40 2007
From: ivoras at fer.hr (Ivan Voras)
Date: Tue, 02 Jan 2007 15:53:40 +0100
Subject: How do I add users using Python scripts on a Linux machine
In-Reply-To: <1167720155.296077.233010@42g2000cwt.googlegroups.com>
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
Message-ID: <endrll$gjk$1@news1.carnet.hr>

Ramdas wrote:
> Well,
> 
> I need to add users from a web interface for a web server, which runs
> only Python. I need to add users, set quotas and in future even look at
> managing ip tables to limit bandwidth.
> 
> I know os.system(), but this has to be done through a form entry
> through a web interface.
> 
> Anyways thanks, do advise if there more pythonic solutions

What you're looking for is actually a pretty complex thing. You *could*
in theory manage /etc/passwd (and its "shadow" file) - you can find
crypto primitives like MD5 and DES on the 'net, but note that you must
run your script under the 'root' account in order to write (and even
read!) the passwd database. The same goes for using os.system and the
built-in OS utility. Be aware of security implications if you're running
your web server under the root account.


From ejensen at visi.com  Tue Jan 16 14:18:42 2007
From: ejensen at visi.com (Ed Jensen)
Date: Tue, 16 Jan 2007 19:18:42 -0000
Subject: How to determine what exceptions a method might raise?
Message-ID: <12qq98ijkn5mld8@corp.supernews.com>

I'm really enjoying using the Python interactive interpreter to learn
more about the language.  It's fantastic you can get method help right
in there as well.  It saves a lot of time.

With that in mind, is there an easy way in the interactive interpreter
to determine which exceptions a method might raise?  For example, it
would be handy if there was something I could do in the interactive
interpreter to make it tell me what exceptions the file method might
raise (such as IOError).

Thanks in advance.


From skip at pobox.com  Fri Jan 12 09:31:18 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 12 Jan 2007 08:31:18 -0600
Subject: How much slower is dict indexing vs. list indexing?
In-Reply-To: <1168611039.720278.13430@s34g2000cwa.googlegroups.com>
References: <1168555253.601611.258600@k58g2000hse.googlegroups.com>
	<mailman.2606.1168556128.32031.python-list@python.org>
	<1168611039.720278.13430@s34g2000cwa.googlegroups.com>
Message-ID: <17831.39862.421489.36796@montanaro.dyndns.org>


    Emin> It sounds like it's probably not worth the effort in general, but
    Emin> might be for extremely ultra-critical parts of code.

Even in extremely ultra-critical parts of code I doubt the loss of
readability would be worth it.  If there are situations where you can really
gain by switching from a natural indexing scheme to lists, there are
probably other places in your code where you will gain just as much benefit
without the corresponding loss of readability.  Indexing lists only appears
to be about twice as fast as indexing dicts:

    % timeit.py -s "data = {'a' : 1, 'b' :2, 'c' : 3}" "for k in 'abc': x = data[k]"
    100000 loops, best of 3: 4.61 usec per loop
    % timeit.py -s "data = [1, 2, 3]" "for k in [0, 1, 2]: x = data[k]"
    100000 loops, best of 3: 2.97 usec per loop

If you're worried about regaining a couple microseconds per index you
probably shouldn't be using Python.

Skip


From chris at kateandchris.net  Tue Jan 30 10:55:43 2007
From: chris at kateandchris.net (Chris Lambacher)
Date: Tue, 30 Jan 2007 10:55:43 -0500
Subject: printing to a redirected stdout from a process that was called
	with "2>&1 > /dev/null &"
In-Reply-To: <d49424c0701300742s1a1b9bfqce132b6abb2d4387@mail.gmail.com>
References: <1170112357.792999.241280@s48g2000cws.googlegroups.com>
	<20070130153919.GA12259@kateandchris.net>
	<d49424c0701300742s1a1b9bfqce132b6abb2d4387@mail.gmail.com>
Message-ID: <20070130155543.GB12259@kateandchris.net>

On Tue, Jan 30, 2007 at 10:42:22AM -0500, Jason Persampieri wrote:
>    Sadly, the group is tied to Python 2.3 for now.
Subprocess for 2.2 and 2.3:
http://www.lysator.liu.se/~astrand/popen5/

Win32 installers for subversion for 2.2 and 2.3:
http://www.lysator.liu.se/~astrand/popen5/

-Chris
> 
>    Actually, I got around this problem by using an intermediate process that
>    happens to handle output on its own (bsub).
> 
>    On 1/30/07, Chris Lambacher <[1]chris at kateandchris.net> wrote:
> 
>      The subprocess module is probably a good starting point:
>      [2]http://docs.python.org/dev/lib/module-subprocess.html
> 
>      It will allow you greater control over what happens with the output of a
>      process that you start.  Specifically look at the the stdout and stderr
>      arguments to Popen.  You can provide these with an open file descriptor
>      or a
>      file object and it will dump the output into there.
> 
>      -Chris
>      >
>      > _jason
>      >
>      > --
>      > [3]http://mail.python.org/mailman/listinfo/python-list
> 
> References
> 
>    Visible links
>    1. mailto:chris at kateandchris.net
>    2. http://docs.python.org/dev/lib/module-subprocess.html
>    3. http://mail.python.org/mailman/listinfo/python-list


From fairwinds at eastlink.ca  Mon Jan  1 09:34:10 2007
From: fairwinds at eastlink.ca (David Pratt)
Date: Mon, 01 Jan 2007 10:34:10 -0400
Subject: Collecting list of module dependencies
Message-ID: <45991BE2.2010803@eastlink.ca>

Hi. Is anyone aware of any code to create a list of dependent modules 
for a python module. Ideally am looking for something with a method to 
create a unique list of imported modules that excludes imports from the 
module being analyzed. Many thanks.

Regards,
David


From sigzero at gmail.com  Thu Jan 11 15:26:18 2007
From: sigzero at gmail.com (Robert Hicks)
Date: 11 Jan 2007 12:26:18 -0800
Subject: Learning Python book, new edition?
In-Reply-To: <mailman.2580.1168528978.32031.python-list@python.org>
References: <mailman.2580.1168528978.32031.python-list@python.org>
Message-ID: <1168547177.121582.320840@k58g2000hse.googlegroups.com>

I would get "Core Python Programming" by Wesley Chun. It covers just
about everything under the sun and includes version 2.5.

Robert



From maxm at mxm.dk  Wed Jan 24 14:52:06 2007
From: maxm at mxm.dk (Max M)
Date: Wed, 24 Jan 2007 20:52:06 +0100
Subject: Email attachments
In-Reply-To: <mailman.3085.1169652009.32031.python-list@python.org>
References: <mailman.3085.1169652009.32031.python-list@python.org>
Message-ID: <45b7b8e7$0$13987$edfadb0f@dread15.news.tele.dk>

Steve Holden skrev:
> I'm having some trouble getting attachments right for all recipients, 
> and it seems like Apple's mail.app is the pickiest client at the moment. 
> It doesn't handle attachments that both Thunderbird and Outlook find 
> perfectly acceptable.
> 
> Since the code I'm using is currently ugly and embedded, before I trim 
> it down for posting could anyone who's successfully generated emails 
> with attachments received by mail.app let me know if they had any 
> problems along the way? Google hasn't given me much on this, but I'm not 
> feeling very creative today.


This method is used in one of my Plone products, and there is also a bit 
of imap in there. But it is probably simple enough to extract the 
attachment relevant parts....


     security.declareProtected(EDIT_CONTENTS_PERMISSION, 'sendMessage')
     def sendMessage(self, to=None, cc=None, bcc=None, inReplyTo=None,
                     subject=None, body='', attachments=None, mode=None,
                     folderPath=None, uid=None, REQUEST=None):
         "Sends a message"
         site_encoding = self._site_encoding()
         ##################
         # Create the message
         msg = Message()
         msg.set_payload(body, site_encoding)
         #####################################
         # if attachment, convert to multipart
         # file fields are posted even if empty, so we need to remove 
those :-s
         if attachments is None:
             attachments = []
         attachments = [a for a in attachments if a]
         if attachments or (mode == 'Forward'):
             mimeMsg = MIMEMultipart()
             mimeMsg.attach(msg)
             # If mode is Forward we get original message as attachment
             if mode == 'Forward' and folderPath and uid:
                 original = self.fetchMessageFromPath(folderPath, uid)
                 mimeMsg.attach(original)
             for attachment in attachments:
                 # Add the attachment
                 tmp = email.message_from_string(str(attachment.headers))
                 filename = tmp.get_param('filename', 'Attachment', 
'Content-Disposition')
                 # clean up IE paths
                 filename = filename[max(filename.rfind('/'),
                                         filename.rfind('\\'),
                                         filename.rfind(':')
                                        )+1:]
                 contentType = tmp['Content-Type']
                 attach_part = Message()
                 attach_part.add_header('Content-Type', contentType, 
name=filename)
                 attach_part.add_header('Content-Disposition', 
'attachment', filename=filename)
                 attach_part.set_payload(attachment.read())
                 Encoders.encode_base64(attach_part)
                 mimeMsg.attach(attach_part)
             msg = mimeMsg
         ########################
         # set headers on message
         from_ = self.getEmail()
         msg['From'] = from_
         msg['Reply-To'] = from_
         if to: msg['To'] = to
         if cc: msg['Cc'] = cc
         if bcc: msg['Bcc'] = bcc
         msg['Date'] = self.ZopeTime().rfc822() # needed by some servers
         if inReplyTo:
             msg['In-Reply-To'] = inReplyTo
         msg['Subject'] = Header(subject, site_encoding)
         ##################
         # Send the message
         SMTPserver = self._mailhost()
         outbox = smtplib.SMTP(SMTPserver)
         try:
             cleaner = lambda adresses: [adress.strip() for adress in 
adresses.split(',') if adress.strip()]
             all_receivers = cleaner(to) + cleaner(cc) + cleaner(bcc)
             outbox.sendmail(from_, all_receivers, msg.as_string())
             success = 1
         except:
             success = 0
         ######################################
         # append the message to the 'Sent' box
         if success:
             Sent = self.getSentboxName()
             connection = self.getConnection()
             try:
                 connection.append(Sent, msg.as_string(), ('\\Seen',))
             except:
                 # we don't want to not send messages just because the 
sentbox isn't set correctly
                 pass
         #################################
         # returns a portal status message
         if REQUEST:
             if success:
                 message = 'Succes! The message was sent '
             else:
                 message = 'Error! The message could not be sent'
             REQUEST.RESPONSE.redirect(self.absolute_url() + 
'/mxmImapClient_compose?portal_status_message=%s' % message)



-- 

hilsen/regards Max M, Denmark

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


From gagsl-py at yahoo.com.ar  Mon Jan 15 19:05:20 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 15 Jan 2007 21:05:20 -0300
Subject: whats wrong with my reg expression ?
In-Reply-To: <ef60af090701151543m1479689cg462a0f263401e5d1@mail.gmail.co
 m>
References: <ef60af090701151441j2dbc2308ka8f326a181b6bba8@mail.gmail.com>
	<7.0.1.0.0.20070115195902.05c75aa0@yahoo.com.ar>
	<ef60af090701151543m1479689cg462a0f263401e5d1@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070115210348.05c788e0@yahoo.com.ar>

At Monday 15/1/2007 20:43, Gert Cuykens wrote:

>PS i also cant figure out what is wrong here ?
>
>         rex=re.compile('^"(?P<value>[^"]*)"$',re.M)
>         for v in l:
>             v=rex.match(v).group('value')
>             v=v.replace('""','"')
>         return(l)
>
>     v=rex.match(v).group('value')
>AttributeError: 'NoneType' object has no attribute 'group'

match() returns None when there is no match, so you have to split 
that in two steps:

m = rex.match(v)
if m:
     v = m.group('value')
else:
     # no match found!


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From Barry.Carroll at psc.com  Wed Jan 17 14:18:52 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Wed, 17 Jan 2007 11:18:52 -0800
Subject: *POLL* How many sheeple believe in the 911 fairy tale and
	willingto accept an Orwellian doublespeak and enslavement world ?
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A7F@eugsrv400.psc.pscnet.com>

> -----Original Message-----
> From: David Bostwick [mailto:david.bostwick at chemistry.gatech.edu]
> Sent: Wednesday, January 17, 2007 10:43 AM
> To: python-list at python.org
> Subject: Re: *POLL* How many sheeple believe in the 911 fairy tale and
> willingto accept an Orwellian doublespeak and enslavement world ?
> 
> In article <1169058752.659674.6680 at s34g2000cwa.googlegroups.com>,
"Robert
> Hicks" <sigzero at gmail.com> wrote:
> >Please, none of the real facts points to anything else except what
> >actually happened. Two planes hit two towers and they came down.
> >
> 
> You're talking to the wind.  This is a conspiracy precisely because
people
> deny the crackpots.  Denial of their "evidence" proves that there is a
> coverup.  Logic is not involved, only belief that doesn't respond to
> dissenting evidence.


Ladies and Gentlemen:

PLEASE take this discussion to a more appropriate forum.  There are many

forums where people will be happy to debate this: physics, firefighting,
metallurgy, geopolitics, etc.  This forum is about the Python
programming language.  Let's keep it that way.  

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed




From S.Mientki-nospam at mailbox.kun.nl  Tue Jan  2 17:37:17 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Tue, 02 Jan 2007 23:37:17 +0100
Subject: list/dictionary as case statement ?
In-Reply-To: <mailman.2226.1167776764.32031.python-list@python.org>
References: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
	<mailman.2226.1167776764.32031.python-list@python.org>
Message-ID: <146b5$459ade8f$d443bb3a$5654@news.speedlinq.nl>

> 
> Yes. Functions are (so called) first class objects. You can refer to one 
> by name, and pass that reference around in variables and other data 
> structures.
> 
> That said, your code above won't work as written because function1 is 
> not in existence when you refer to it.
> 
Yes, I just found that out.

Thanks Gary and Grant,
this principle really works like a charm.

cheers,
Stef Mientki



From wesbrooks at gmail.com  Wed Jan  3 11:57:41 2007
From: wesbrooks at gmail.com (Wesley Brooks)
Date: Wed, 3 Jan 2007 16:57:41 +0000
Subject: type classobj not defined?
Message-ID: <eec9f8ee0701030857o6218f87bpc40f63c62575098d@mail.gmail.com>

Dear Users,

I'm in the process of adding assert statements to a large piece of
code to aid with bug hunting and came across the following issue;

Using python in a terminal window you can do the following:

>type(False) == bool
True

I would like to check that an object is a class, here's an example:

>class b:
....def __init__(self):
........self.c = 1
....def d(self):
........print self.c

>type(b)
<type 'classobj'>

But the following fails:

>type(b) == classobj
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'classobj' is not defined

For the time being I'll use b.__name__ == b to ensure I'm getting the
right class. Is there a reason why the other types such as bool are
defined but classobj isn't?

I'm running the following version of python:

Python 2.4.3 (#1, Jun 13 2006, 11:46:08)
[GCC 4.1.1 20060525 (Red Hat 4.1.1-1)] on linux2

Cheers,

Wesley Brooks


From deets at nospam.web.de  Fri Jan 26 12:29:34 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 26 Jan 2007 18:29:34 +0100
Subject: time series data and NumPy
References: <1169830757.220964.196540@m58g2000cwm.googlegroups.com>
Message-ID: <51us3uF1mdcpsU1@mid.uni-berlin.de>

BBands wrote:

> Good morning,
> 
> I store time series data in a SQL database. The results of a typical
> query using pyodbc look like this.
> 
> Date            Close
> "2007-01-17" 22.57
> 
> Where Date is a datetime.date object and Close is a float.
> 
> I'd like to put this data in a NumPy array for processing, but am
> unsure as to how to handle the date. In the past I've used lists, but I
> am looking to boost speed a bit as I wish to do a large number of
> transformations and comparisons.
> 
> Can one index an array using datetime objects?
> 
> For example it would be nice to do a union of two arrays so that any
> dates missing in either one were eliminated.
> 
> Thoughts on doing rolling operations, such as an n-period average or
> variance?
> 
> Thoughts on working with time series data in arrays in general?

I'm pretty sure you're out of luck here - even _if_ NumPy would handle
arbitrary data-types (AFAIK it doesn't, but then I'm not a total expert
there), it certainly won't be able to make its hi-performance functions
work on them.

What you could do would be to convert the date-column into a timestamp,
which is a int/long, and use that. Would that help?

diez


From horpner at yahoo.com  Mon Jan  8 10:10:22 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 8 Jan 2007 16:10:22 +0100
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
	<%Isoh.22447$X97.12337@newsfe18.lga>
Message-ID: <slrneq4nqc.k8.horpner@FIAD06.norwich.edu>

On 2007-01-08, hg <hg at nospam.org> wrote:
> sturlamolden wrote:
>
>> The designers of Java, C++, C#, Ada95, Delphi, etc. seem to think that
>> if an object's 'internal' variables or states cannot be kept private,
>> programmers get an irresistible temptation to mess with them in
>> malicious ways. But if you are that stupid, should you be programming
>> in any language? The most widely used language is still C, and there is
>> no concept of private data in C either, nor is it needed.
>
>
> void test(void)
> {
>   static int i;
> }
>
>
> Do you agree that i is "private" to test ?

In C one uses the pointer to opaque struct idiom to hide data.
For example, the standard FILE pointer.

-- 
Neil Cerutti


From vpolukcht at gmail.com  Tue Jan 16 06:43:30 2007
From: vpolukcht at gmail.com (Victor Polukcht)
Date: 16 Jan 2007 03:43:30 -0800
Subject: Regular expressions question
Message-ID: <1168947810.175793.228620@51g2000cwl.googlegroups.com>

I have 2 strings:

"Global               etsi3   *200 ok            30   100% 100%
Outgoing"
and
"Global               etsi3   *   4 ok             30   100% 100%
Outgoing"

The difference is "*200" instead of "*  4". Is there ability to write a
regular expression that will match both of that strings?



From http  Wed Jan 10 13:21:32 2007
From: http (Paul Rubin)
Date: 10 Jan 2007 10:21:32 -0800
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
Message-ID: <7x8xga215f.fsf@ruckus.brouhaha.com>

nmm1 at cus.cam.ac.uk (Nick Maclaren) writes:
> Yes, I know that it is a bit Irish for the best way to use a shared
> memory system to be to not share memory, but that's how it is.

But I thought serious MPI implementations use shared memory if they
can.  That's the beauty of it, you can run your application on SMP
processors getting the benefit of shared memory, or split it across
multiple machines using ethernet or infiniband or whatever, without
having to change the app code.


From Thomas.Ploch at gmx.net  Tue Jan  9 19:56:53 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Wed, 10 Jan 2007 01:56:53 +0100
Subject: Question: Best Practice? (module 'shelve')
In-Reply-To: <45A438AE.10105@gmx.net>
References: <45A438AE.10105@gmx.net>
Message-ID: <45A439D5.3080200@gmx.net>

Thomas Ploch schrieb:
> Hello fellows,
> 
> I just wanted to know, if there is any best practice concerning
> following code:
> 
> import re, shelve
> 
> class TextMatcher:
>     def __init__(self, patterns, email=False, dbName='textmatch.db'):
>         self._initPatterns(patterns)
>         self.email = email
>         self.dbName = dbName
>         if self.email:
>             self.emailList = []
>             self.emailList.append(
> 		re.compile(r'[a-zA-Z0-9_.]+@\w+\.\w+'))
> 
>     def match(self, src, url):
>         self.matchDict = {}
>         self.matchDict[url] = {}
> 	# The next 2 functions just add stuff to self.matchDict
>         if self.email:
>             self._addEmails(src, url)
>         self._addPatterns(src, url)
> 	# Is it good practice to open, write and close the db straight
> 	# away? Or is it better to leave it open until the whole program
> 	# has finished, and close it then?
>         self.openDB(self.dbName)
>         self.db[url] = self.matchDict[url]
>         self.db.close()
> 	# I want to del the matchDict each time so it can't grow big.
> 	# Is this good, or should it be left open, too?
>         del self.matchDict
> 
>     def openDB(self, dbName=None, modeflag='c'):
>         if dbName == None:
>             self.db = shelve.open('textmatch.db', flag=modeflag)
>         else:
>             self.db = shelve.open(dbName, flag=modeflag)
> 
> 

s/del self.matchDict/self.matchDict.clear() and ignore the second
question. When I read the sent message, it came to my mind. :-)

Thomas



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Jan 31 07:23:03 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 31 Jan 2007 13:23:03 +0100
Subject: another newbie question: why should you use "*args" ?
In-Reply-To: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
References: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
Message-ID: <45c089de$0$6740$426a74cc@news.free.fr>

stef a ?crit :
> 
> why should I use *args,
> as in my ignorance,
> making use of a list (or tupple) works just as well,
> and is more flexible in it's calling.

Err... How so ?

> So the simple conclusion might be: never use "*args",
> or am I overlooking something ?

Try writing generic higher order functions without it, and let us know.

dummy example:

def trace(func, *args, **kw):
   print "calling %s with %s %s" % (func.__name__, str(args), kw)
   try:
     result = func(*args, **kw)
     print "got %s" % str(result)
     return result
   except Exception, e:
     print "raised : %s" % e
     raise



From jtravs at gmail.com  Wed Jan 10 03:27:28 2007
From: jtravs at gmail.com (jtravs at gmail.com)
Date: 10 Jan 2007 00:27:28 -0800
Subject: distutils and ctypes
In-Reply-To: <mailman.2494.1168371562.32031.python-list@python.org>
References: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>
	<mailman.2494.1168371562.32031.python-list@python.org>
Message-ID: <1168417648.227041.31110@o58g2000hsb.googlegroups.com>


Robert Kern wrote:
> jtravs at gmail.com wrote:
>
> > So finally, my question is, is there a way to get distutils to simply
> > build a shared library on windows so that I can use ctypes with them???
>
> Not out-of-box, no. The OOF2 project has added a bdist_shlib command which
> should do most of what you want, though. It's somewhat UNIX-oriented, and I
> think it tries to install the shared library to a standard location (e.g.
> /usr/local/lib). You might want to modify it to install the shared library in
> the package so it is easy to locate at runtime.
>
>   http://www.ctcms.nist.gov/oof/oof2/
>   http://www.ctcms.nist.gov/oof/oof2/source/oof2-2.0.1.tar.gz
>
> The code is in the shlib/ subdirectory.
> 

Thank you very much - this looks like exactly what I want.
John



From ericclack at googlemail.com  Tue Jan 16 17:36:03 2007
From: ericclack at googlemail.com (EricClack)
Date: 16 Jan 2007 14:36:03 -0800
Subject: mod_python example code
Message-ID: <1168986961.027481.107300@a75g2000cwd.googlegroups.com>

I've been using Python, MySQL, Apache and mod_python for some time now
and think that it is a great combination for many projects. However I
have been constantly surprised by the lack of any visible mod_python
examples on the web.

So, I've released my framework in the hope that it will be useful to
others and of course to seek comments, corrections, criticisms from the
community.

This framework takes care of:
- templating (using Cheetah)
- querying MySQL (using Manager objects)
- sending emails
- debugging (to Apache log or stdout)
- users and security

Download the framework from this page:
http://www.bright-interactive.com/python/
It's licensed under the GPL.

I hope to add more examples over the coming months (e.g. demonstrating
emails, etc). However, the full source code is provided and its
reasonably well commented, so you can always discover for yourself.

-Eric.



From Eric_Dexter at msn.com  Sun Jan 14 02:40:23 2007
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 13 Jan 2007 23:40:23 -0800
Subject: Tkinter code (with pmw) executing to soon please help
In-Reply-To: <mailman.2704.1168749021.32031.python-list@python.org>
References: <1168746063.322340.10410@l53g2000cwa.googlegroups.com>
	<mailman.2704.1168749021.32031.python-list@python.org>
Message-ID: <1168760423.608731.213550@a75g2000cwd.googlegroups.com>

> button[num] = Tkinter.Button(frame,text =  returnstring,
> command=callback(returnstring))#


I understand this part of it

def callback(text):
  def handler(event):
    print text

It stopped calling it automaticaly but will not do anything when I
click on the button.  Does something have to change on this line as
well.

button[num] = Tkinter.Button(frame,text =  returnstring,
> command=callback(returnstring)





Gabriel Genellina wrote:
> <Eric_Dexter at msn.com> escribi? en el mensaje
> news:1168746063.322340.10410 at l53g2000cwa.googlegroups.com...
>
> > Instead of creating my buttons and waiting for me to press them to
> > execute they are executing when I create them and won't do my callback
> > when I press them..  thanks for any help in advance
>
> This is a very frequent beginner's mistake. You are *calling* the event
> handler at the moment you create the buttons. You have to provide a
> *callable* but not call it yet.
>
> > button[num] = Tkinter.Button(frame,text =  returnstring,
> > command=callback(returnstring))#
>
> So `callback` should return a function, like this:
>
> def callback(text):
>   def handler(event):
>     print text
> 
> -- 
> Gabriel Genellina



From steve at REMOVEME.cybersource.com.au  Sun Jan 14 22:43:55 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Mon, 15 Jan 2007 14:43:55 +1100
Subject: Conflicting needs for __init__ method
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.15.03.43.54.630644@REMOVEME.cybersource.com.au>

On Sun, 14 Jan 2007 15:32:35 -0800, dickinsm wrote:

> Suppose you're writing a class "Rational" for rational numbers.  The
> __init__ function of such a class has two quite different roles to
> play.  First, it's supposed to allow users of the class to create
> Rational instances; in this role, __init__ is quite a complex beast.
> It needs to allow arguments of various types---a pair of integers, a
> single integer, another Rational instance, and perhaps floats, Decimal
> instances, and suitably formatted strings.  It has to validate the
> input and/or make sure that suitable exceptions are raised on invalid
> input.  And when initializing from a pair of integers---a numerator
> and denominator---it makes sense to normalize: divide both the
> numerator and denominator by their greatest common divisor and make
> sure that the denominator is positive.
> 
> But __init__ also plays another role: it's going to be used by the
> other Rational arithmetic methods, like __add__ and __mul__, to return
> new Rational instances.  For this use, there's essentially no need for
> any of the above complications: it's easy and natural to arrange that
> the input to __init__ is always a valid, normalized pair of integers.
> (You could include the normalization in __init__, but that's wasteful

Is it really? Have you measured it or are you guessing? Is it more or less
wasteful than any other solution?

> when gcd computations are relatively expensive and some operations,
> like negation or raising to a positive integer power, aren't going to
> require it.)  So for this use __init__ can be as simple as:
> 
> def __init__(self, numerator, denominator):
>     self.numerator = numerator
>     self.denominator = denominator
> 
> So the question is: (how) do people reconcile these two quite
> different needs in one function?  I have two possible solutions, but
> neither seems particularly satisfactory, and I wonder whether I'm
> missing an obvious third way.  The first solution is to add an
> optional keyword argument "internal = False" to the __init__ routine,
> and have all internal uses specify "internal = True"; then the
> __init__ function can do the all the complicated stuff when internal
> is False, and just the quick initialization otherwise.  But this seems
> rather messy.

Worse than messy. I guarantee you that your class' users will,
deliberately or accidentally, end up calling Rational(10,30,internal=True)
and you'll spent time debugging mysterious cases of instances not being
normalised when they should be.


> The other solution is to ask the users of the class not to use
> Rational() to instantiate, but to use some other function
> (createRational(), say) instead.

That's ugly! And they won't listen.

> Of course, none of this really has anything to do with rational
> numbers.  There must be many examples of classes for which internal
> calls to __init__, from other methods of the same class, require
> minimal argument processing, while external calls require heavier and
> possibly computationally expensive processing.  What's the usual way
> to solve this sort of problem?

class Rational(object):
    def __init__(self, numerator, denominator):
        print "lots of heavy processing here..."
        # processing ints, floats, strings, special case arguments, 
        # blah blah blah...
        self.numerator = numerator
        self.denominator = denominator
    def __copy__(self):
        cls = self.__class__
        obj = cls.__new__(cls)
        obj.numerator = self.numerator
        obj.denominator = self.denominator
        return obj
    def __neg__(self):
        obj = self.__copy__()
        obj.numerator *= -1
        return obj
        
I use __copy__ rather than copy for the method name, so that the copy
module will do the right thing.



-- 
Steven D'Aprano 



From fccoelho at gmail.com  Wed Jan 24 19:25:19 2007
From: fccoelho at gmail.com (Flavio)
Date: 24 Jan 2007 16:25:19 -0800
Subject: raise UnicodeError, "label too long"
References: <1169672223.231030.262610@l53g2000cwa.googlegroups.com>
	<pan.2007.01.24.21.23.25.331322@gmx.net>
	<1169675004.099912.79520@v33g2000cwv.googlegroups.com>
	<45B7D4F7.9020308@v.loewis.de>
Message-ID: <1169684719.607504.307310@l53g2000cwa.googlegroups.com>


something like this, for instance:
http://.wikipedia.org/wiki/Copper%28II%29_hydroxide

but even url with any non-ascii characters such as this

http://.wikipedia.org/wiki/Ammonia

also fail when passed to urlopen :
File "/usr/lib/python2.4/encodings/idna.py", line 72, in ToASCII
    raise UnicodeError, "label too long"
UnicodeError: label too long

very strange, because I tried other unicode urls  from the python
console like this

urllib2.urlopen(u'www.google.com')

and it works normally:





Martin v. L?wis escreveu:
> Flavio schrieb:
> > What I am doing is very simple:
> >
> > I fetch an url (html page) parse it using BeautifulSoup, extract the
> > links and try to open each of the links, repeating the cycle.
> >
> > Beautiful soup converts the html to unicode. That's why when I try to
> > open the links extracted from the page I get this error.
> >
> > This is bad, since some links do contain strings with non-ascii
> > characters.
>
> Please try answering the exact question that Marc asked:
> what is an example for unicode string that triggers the
> exception?
> 
> Regards,
> Martin



From gert.cuykens at gmail.com  Mon Jan 22 15:55:13 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Mon, 22 Jan 2007 21:55:13 +0100
Subject: instancemethod
In-Reply-To: <45b51298$0$8289$426a74cc@news.free.fr>
References: <mailman.2961.1169417800.32031.python-list@python.org>
	<45b51298$0$8289$426a74cc@news.free.fr>
Message-ID: <ef60af090701221255m575701e7jaae6bd858acbea5c@mail.gmail.com>

Reading all of the above this is the most simple i can come too.

import MySQLdb

class Db:

    def __init__(self,server,user,password,database):
        self._db=MySQLdb.connect(server , user , password , database)
        self._db.autocommit(True)
        self.cursor=self._db.cursor()

    def excecute(self,cmd):
        self.cursor.execute(cmd)
        self.rowcount=int(self.cursor.rowcount)

    def close(self):
        self.cursor.close()
        self._db.close()

    def __del__(self):
        try:
            self.close()
        except:
            pass

if __name__ == '__main__':
    gert=Db('localhost','root','******','gert')
    gert.excecute('select * from person')
    for row in gert.cursor:
        print row

This must be the most simple it can get right ?

PS i didn't understand the __getattr__ quit well but i thought it was
just to overload the privies class


From dimitri.pater at gmail.com  Wed Jan 24 18:52:18 2007
From: dimitri.pater at gmail.com (dimitri pater)
Date: Thu, 25 Jan 2007 00:52:18 +0100
Subject: Python does not play well with others
In-Reply-To: <17846.49695.213309.406485@montanaro.dyndns.org>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<17846.49695.213309.406485@montanaro.dyndns.org>
Message-ID: <e75321bd0701241552u3c670184k7643dfbde6d44b26@mail.gmail.com>

On 1/24/07, skip at pobox.com <skip at pobox.com> wrote:
>
>
>     John> MySQLdb has version and platform compatibility problems.
>
> Got specific examples?  I've successfully used MySQLdb on Linux, Mac and
> Solaris with no compatibility problems at all.

I have been using MySLQdb also on Linux, Mac *and* Windows in various
applications and never encountered compatibility problems in the last two or
three years.

best regards,
Dimitri
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070125/f787245b/attachment.html>

From jan.dries at dcube-resource.be  Sat Jan 13 19:22:54 2007
From: jan.dries at dcube-resource.be (Jan Dries)
Date: Sun, 14 Jan 2007 01:22:54 +0100
Subject: sqlobject 0.8.0b1 and python 2.5
In-Reply-To: <5f56302b0701130618u4f47296fv73426a32064e81cd@mail.gmail.com>
References: <5f56302b0701130618u4f47296fv73426a32064e81cd@mail.gmail.com>
Message-ID: <45A977DE.4030900@dcube-resource.be>

Daniel Nogradi wrote:
> Since I'm starting to use sqlobject right now, if there is a
> similar ORM tool that is comparable but up to date and actively
> developed, that would be an option too. (Things like SQLAlchemy are
> waaaay to complicated and complex for my needs. :))

Perhaps not really an answer to your question, but is SQLAlchemy really 
so much more complicated than SQLObject?
I've been using SQLObject a lot the past few years, but have recently 
migrated some of my code to SQLAlchemy for various reasons: it's much 
better documented, has more features, performs better and at least seems 
to be more actively developed.
My conclusion was that I had to make very little changes to make my 
SQLObject code work with SQLAlchemy. Defining your classes/tables is 
more verbose, but still straightforward. And by using the proper 
defaults and things like assign_mapper, actual use of SQLAlchemy comes 
very close to SQLObject.

Regards,
Jan




From larry.bates at websafe.com  Tue Jan 30 11:52:18 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 30 Jan 2007 10:52:18 -0600
Subject: data design
In-Reply-To: <45bf69cb$0$31452$426a74cc@news.free.fr>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
	<45BF5CC5.5060306@websafe.com>
	<45bf69cb$0$31452$426a74cc@news.free.fr>
Message-ID: <45BF77C2.7020306@websafe.com>

Imbaud Pierre wrote:
> Larry Bates a ?crit :
>> Imbaud Pierre wrote:
>>
>>> The applications I write are made of, lets say, algorithms and data.
>>> I mean constant data, dicts, tables, etc: to keep algorithms simple,
>>> describe what is peculiar, data dependent, as data rather than "case
>>> statements". These could be called configuration data.
>>>
>>> The lazy way to do this: have modules that initialize bunches of
>>> objects, attributes holding the data: the object is somehow the row of
>>> the "table", attribute names being the column. This is the way I
>>> proceeded up to now.
>>> Data input this way are almost "configuration data", with 2 big
>>> drawbacks:
>>> - Only a python programmer can fix the file: this cant be called a
>>>   configuration file.
>>> - Even for the author, these data aint easy to maintain.
>>>
>>> I feel pretty much ready to change this:
>>> - make these data true text data, easier to read and fix.
>>> - write the module that will make python objects out of these data:
>>> the extra cost should yield ease of use.
>>>
>>> 2 questions arise:
>>> - which kind of text data?
>>>    - csv: ok for simple attributes, not easy for lists or complex
>>>    data.
>>>    - xml: the form wont be easier to read than python code,
>>>      but an xml editor could be used, and a formal description
>>>      of what is expected can be used.
>>> - how can I make the data-to-object transformation both easy, and able
>>>  to spot errors in text data?
>>>
>>> Last, but not least: is there a python lib implementing at least part
>>> of this dream?
>>
>>
>> Use the configurations module.  It was built to provide a way to parse
>> configuration files that provide configuration data to program.  It is
>> VERY fast so the overhead to parse even thousands of lines of config
>> data is extremely small.  I use it a LOT and it is very flexible and
>> the format of the files is easy for users/programmers to work with.
>>
>> -Larry Bates
> U mean configParser? Otherwise be more specific (if U dont mind...)

Sorry, yes I meant configParser module.  Had a little "brain disconnect"
there.

-Larry


From bearophileHUGS at lycos.com  Mon Jan 15 03:38:56 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 15 Jan 2007 00:38:56 -0800
Subject: Class list of a module
In-Reply-To: <mailman.2729.1168848415.32031.python-list@python.org>
References: <OF26C969EB.BAFF11A0-ONC1257264.002723D2-C1257264.0028BCA1@
	an.cit.alcatel.fr>
	<OF26C969EB.BAFF11A0-ONC1257264.002723D2-C1257264.0028BCA1@an.cit.alcatel.fr>
	<mailman.2729.1168848415.32031.python-list@python.org>
Message-ID: <1168850336.276790.73810@38g2000cwa.googlegroups.com>

Gabriel Genellina:
> >import inspect
> def getClassList(aModule):
>      return [cls for cls in vars(aModule).itervalues()
>                      if inspect.isclass(cls)]

This is short enough too:

from inspect import isclass
getclasses = lambda module: filter(isclass, vars(module).itervalues())

Bye,
bearophile



From robin at alldunn.com  Sun Jan 21 18:31:03 2007
From: robin at alldunn.com (Robin Dunn)
Date: Sun, 21 Jan 2007 15:31:03 -0800
Subject: [ANN] wxPython 2.8.1.1
Message-ID: <45B3F7B7.4030006@alldunn.com>



Announcing
----------

The 2.8.1.1 release of wxPython is now available for download at
http://wxpython.org/download.php.  This release adds a few minor
enhancements and a number of bug fixes designed to further stabalize
the 2.8.x release series.

Source code is available, as well as binaries for both Python 2.4 and
2.5, for Windows and Mac, as well some pacakges for various Linux
distributions.  A summary of changes is listed below and also at
http://wxpython.org/recentchanges.php.


What is wxPython?
-----------------

wxPython is a GUI toolkit for the Python programming language. It
allows Python programmers to create programs with a robust, highly
functional graphical user interface, simply and easily. It is
implemented as a Python extension module that wraps the GUI components
of the popular wxWidgets cross platform library, which is written in
C++.

wxPython is a cross-platform toolkit. This means that the same program
will usually run on multiple platforms without modifications.
Currently supported platforms are 32-bit Microsoft Windows, most Linux
or other Unix-like systems using GTK2, and Mac OS X 10.3+, in most
cases the native widgets are used on each platform to provide a 100%
native look and feel for the application.


Changes in 2.8.1.1
------------------

wxMSW: Fix lack of spin control update event when control lost focus

Added a typeId property to the PyEventBinder class that holds the
eventType ID used for that event.  So when you need the eventType
(such as when sending your own instance of standard events) you can
use, for example, wx.EVT_BUTTON.typeId instead of
wx.wxEVT_COMMAND_BUTTON_CLICKED.   Note that there are a few composite
events, such as EVT_MOUSE and EVT_SCROLL, that will actually bind
multiple event types at once, and in these cases the typeId property
may not give you what you want.  You should use te component events in
these cases.

PyCrust now has an option for showing/hiding the notebook.

wxMSW:  Corrected drawing of bitmaps for disabled menu items.

Enhanced the wx.lib.mixins.inspect module.  In addition to showing a
PyCrust window it is now a widget browser, which provides a tree
loaded up with all the widgets in the app, optionally with the sizers
too, and also a panel displaying the properties of the selected
window.  Run the demo and type Ctrl-Alt-I keystroke (or Cmd-Alt-I on
the Mac) to see how it works.  You can add this to your own apps with
just a few lines of code.

Added wx.SearchCtrl.[Get|Set]DescriptiveText

wxMac: Added support for the wx.FRAME_FLOAT_ON_PARENT style.

wxMac: the popups used for call tips and autocomplete lists in
StyledTextCtrl (such as in PyShell) are now top-level float-on-parent
windows so they are no longer clipped by the bounds of the stc window.

Added EVT_TASKBAR_CLICK and use it to show taskbar icon menu on right
button release, not press, under MSW (bug 1623761)

Added wx.TreeCtrl.CollapseAll[Children]() and IsEmpty() methods

Fix wx.MDIChidFrame.GetPosition() (patch 1626610)

Fix attribute memory leak in wx.grid.Grid::ShowCellEditControl() (patch
1629949)

wxGTK: Fix for controls on a toolbar being the full height of the
toolbar instead of their natural height.

wx.lib.customtreectrl patches from Andrea Gavana.

wxMac: Applied patch #1622389, fixing two memory leaks in
GetPartialTextExtents.

More fixes for the native wx.ListCtrl on Mac.

Added wx.aui.AuiNotebook.GetAuiManager().

Added wx.aui.AuiMDIParentFrame and wx.aui.AuiMDIChildFrame, which
essentially implement the MDI interface using a normal wx.Frame and a
wx.aui.AuiNotebook.



-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!



From steve at REMOVEME.cybersource.com.au  Tue Jan 23 02:30:34 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 23 Jan 2007 18:30:34 +1100
Subject: OT: Trolling for fun and profit
Message-ID: <pan.2007.01.23.07.30.34.764450@REMOVEME.cybersource.com.au>

Oh the shame... I've been caught out by a troll.

I received what I thought was a genuine email from a regular poster on
this list (not one of the really high volume posters, but someone who is
around enough that his name would be familiar) who, I thought, was trying
to make a genuine point about posting styles, conventions and tolerance of
different opinions. I disagreed with the point, but thought it was genuine
and so responded to it. He's just replied to me with this comment:

"The only reason I'm top-posting here is because it so obviously pushes
your buttons."

I well and truly got caught. I can't say its the first time I've ever been
caught by a troll, but it hasn't been for many years, so I have to
grudgingly give him points. He fooled me but good.

I won't mention any names -- he doesn't need the publicity. But if you get
an emotionally distraught email off-list from a regular, particularly if
it goes on about tolerance and "why can't we all just get along?", be
aware that there's a good chance he's just trolling.


-- 
Steven D'Aprano 



From s.mientki at id.umcn.nl  Wed Jan 31 09:05:10 2007
From: s.mientki at id.umcn.nl (stef)
Date: Wed, 31 Jan 2007 15:05:10 +0100
Subject: another newbie question: why should you use "*args" ?
In-Reply-To: <1170247737.232403.114850@k78g2000cwa.googlegroups.com>
References: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
	<1170247737.232403.114850@k78g2000cwa.googlegroups.com>
Message-ID: <56667$45c0a216$83aef404$16652@news1.tudelft.nl>


> It's bad practice to use built-ins like 'list' as a regular variable
> name.
>   
ok, but it was just an example (in practice, I always use very long 
names ;-)
>   
>> # calling method 1:
>> execute (S[0], S[4] )
>>
>> # calling method 2:
>> execute ( ( S[0], S[4] ) )
>>     
>
> Let's take a look at those side-by-side:
> execute (S[0], S[4] )
> execute ( ( S[0], S[4] ) )
>
> Now, which one *looks* better?
>
>   
>> # or *the extra flexibility)
>> mylist = ( S[0], S[4] )
>> execute ( mylist )
>>     
>
> Also, take into consideration the opposite end of the pole; you have
> your list of arguments (args), and your about to call a function that
> was declared something like this:
> def someFunction(arg1, arg2, arg3):
>   # etc.
> Which is clearer?
> someFunction(*args)
> someFunction(args[0], args[1], args[2])
>
> And if you've got a variable number of arguments, it becomes virtually
> impossible to avoid using the *args syntax.
>
>   
# So with this construct, I have all flavours:

def chunk_plot(*args):
    if len(args)==1: my_example_var = args[0]
    else:                 my_example_var = args
    for i in range  ( len ( my_example_var ) ):
        ... do something with  my_example_var [i]

# calling the procedure
chunk_plot (S[1], S[4])
chunk_plot ( ( S[1], S[4] ) )
my_action_list = ( S[1], S[2] )
chunk_plot ( my_action_list )


And sorry, no need for kwargs for now ;-)

thanks guys,
Stef
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070131/d3f994e0/attachment.html>

From cvanarsdall at mvista.com  Tue Jan 30 14:19:40 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Tue, 30 Jan 2007 11:19:40 -0800
Subject: The reliability of python threads
In-Reply-To: <epmk7l$7k4$2@sea.gmane.org>
References: <mailman.3092.1169657938.32031.python-list@python.org>	<ep8gue$3tu$1@panix3.panix.com>	<45B90118.5010408@mvista.com>
	<epmk7l$7k4$2@sea.gmane.org>
Message-ID: <45BF9A4C.3070002@mvista.com>

Steve Holden wrote:
> [snip]
>
> Are you using memory with built-in error detection and correction?
>
>   
You mean in the hardware?  I'm not really sure, I'd assume so but is 
there any way I can check on this?  If the hardware isn't doing that, is 
there anything I can do with my software to offer more stability?





-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From beliavsky at aol.com  Tue Jan  2 00:20:31 2007
From: beliavsky at aol.com (Beliavsky)
Date: 1 Jan 2007 21:20:31 -0800
Subject: Writing more efficient code
In-Reply-To: <459959ea$0$8719$ed2619ec@ptn-nntp-reader02.plus.net>
References: <mailman.2185.1167676577.32031.python-list@python.org>
	<459959ea$0$8719$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <1167715231.450710.325860@42g2000cwt.googlegroups.com>

If in the newsgroup comp.lang.x somone asks how to do y, and you
suggest using language z, without answering their question, which was
how to do it in x, you will likely just annoy people and perhaps make
it even less likely that they will try z.

I have my own favorite language z and have not always heeded the above
advice, but I think the principle is still correct.



From webraviteja at gmail.com  Mon Jan  1 01:44:55 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 31 Dec 2006 22:44:55 -0800
Subject: C app and Python
In-Reply-To: <1167577264.741127.284630@48g2000cwx.googlegroups.com>
References: <1167577264.741127.284630@48g2000cwx.googlegroups.com>
Message-ID: <1167633895.328649.145780@i12g2000cwa.googlegroups.com>


Vertilka wrote:
> Hi,
> I need to create an application that the user ask for python script to
> run.
> this script will call the C application functions (in my app. the
> function will draw on screen).
>
> Do I need to create an extension ? Note that this is not a DLL, but a C
> application.
> or I need to embed Python in my C application.
>
> Thanks,
> Vertilka

A bit of both :-)
http://www.python.org/doc/ext/extending-with-embedding.html

Ravi Teja.



From rrr at ronadam.com  Tue Jan 16 07:32:12 2007
From: rrr at ronadam.com (Ron Adam)
Date: Tue, 16 Jan 2007 06:32:12 -0600
Subject: assert versus print [was Re: The curious behavior of integer
	objects]
In-Reply-To: <1168931486.610893.250040@38g2000cwa.googlegroups.com>
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>	<mailman.2744.1168901460.32031.python-list@python.org>	<pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>	<76fd5acf0701151838l1a724be5n3f1e1fda629d1464@mail.gmail.com>	<mailman.2762.1168916788.32031.python-list@python.org>
	<1168931486.610893.250040@38g2000cwa.googlegroups.com>
Message-ID: <eoigss$mc4$1@sea.gmane.org>

Carl Banks wrote:
> Ron Adam wrote:
>> There have been times where I would like assert to be a little more assertive
>> than it is.  :-)
>>
>> ie.. not being able to turn them off with the -0/-00 switches, and having them
>> generate a more verbose traceback.
> 
> Personally, I'd rather see it get less assertive, i.e., having it only
> work in a special debugging mode.  That way people who haven't RTFM
> don't use it to make sure their input is correct.
> 
> 
> Carl Banks

Well, the manual could be improved in this area quite a bit.  There also really 
need to be easier to find examples for both assert and warnings use.


But it does only work in a special debugging mode.  Didn't you RTFM?  ;-)

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

It just happens this mode is turned on by default.  So you would like this to be 
turned off by default.  I agree.  I think there may be a way to change pythons 
default startup behavior for this.


Warnings generated by warn() on the other hand can be silenced, but not 
completely ignored.  But I also think they could be a more useful and flexible 
tool for debugging purposes.

    http://docs.python.org/lib/warning-functions.html

I have to admit that part of why assert seems wrong to me is the meaning of the 
word implies something you shouldn't be able to ignore.  While warnings seem 
like something that can be disregarded.

I think maybe the best way to use both may be to combine them...

    assert <condition> warn(...)

But I'm not sure that doesn't have problems of it's own. <shrug>

Cheers,
    Ron












From __peter__ at web.de  Thu Jan 18 07:14:07 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 18 Jan 2007 13:14:07 +0100
Subject: classes: need for an explanation
References: <1169121502.779509.138890@m58g2000cwm.googlegroups.com>
Message-ID: <eonoa0$dlm$01$1@news.t-online.com>

0k- wrote:

> class Thing(object):
>     props?=?{}
>     def?__init__(self):
>         self.props["text"]?=?TxtAttr("something?important")
> 
> t1 = Thing()
> t2 = Thing()
> 
> t2.props["text"].value = "another string"
> 
> print "t1: %s\nt2: %s" % (t1.props["text"].value,
> t2.props["text"].value)
> 
> the above code outputs:
> 
> t1: another string
> t2: another string
> 
> so the problem i cannot get through is that both t1 and t2 have the
> same attr class instance.
> could somebody please explain me why? :)

Putting an assignment into the class body makes the name a /class/ attribute
which is shared by all instances of the class:

>>> class Thing:
...     props = {} # this is a class attribute
...
>>> t1, t2 = Thing(), Thing()
>>> t1.props is t2.props
True

The solution is to move the attribute creation into the initializer:

>>> class Thing:
...     def __init__(self):
...             self.props = {} # an instance attribute
...
>>> t1, t2 = Thing(), Thing()
>>> t1.props is t2.props
False

Peter



From wolfgang.grafen at marconi.com  Mon Jan 15 07:37:40 2007
From: wolfgang.grafen at marconi.com (Wolfgang Grafen)
Date: Mon, 15 Jan 2007 13:37:40 +0100
Subject: indentation in python
In-Reply-To: <1168750708.059882.107750@v45g2000cwv.googlegroups.com>
References: <1168742956.828457.287610@m58g2000cwm.googlegroups.com>
	<1168750708.059882.107750@v45g2000cwv.googlegroups.com>
Message-ID: <45AB7594.5000004@marconi.com>

Dan Bishop wrote:
> On Jan 13, 8:49 pm, "lee" <libi... at gmail.com> wrote:
>> Can anyone tell me the basics about indentation in python......how we
>> use it in loops and constructs..etc....
> 
> It's just like indentation in other languages, except that it's
> syntactically required.
> 
The indent rule is minimal:
- indent the following line after a colon (:)
- dedent when you leave that block to the level you wish to continue
- you cannot have an empty block; use pass or None for an otherwise empty block
- as always: have fun!


From __peter__ at web.de  Fri Jan 26 13:19:15 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 26 Jan 2007 19:19:15 +0100
Subject: Handling empty form fields in CGI
References: <mailman.3207.1169834026.32031.python-list@python.org>
Message-ID: <epdgma$old$03$1@news.t-online.com>

Christopher Mocock wrote:

> Bit of a python newbie so need a little help with a CGI script I'm
> trying to write. I've got it working fine as long as the fields of the
> form are filled in correctly, however I need to be able to accept blank
> entries. Therefore I want to convert any empty entries to an empty string.
> 
> For example, if I call the following CGI script as:
> 
> http://localhost/cgi-bin/test.cgi?myfield=hello
> 
> ...it prints hello in the browser. But if I call it as:
> 
> http://localhost/cgi-bin/test.cgi?myfield=
> 
> I get an exception. I want it to treat myfield as an empty string and
> not throw an exception.
> 
> Any suggestions?

You can catch the exception:

def test():
    try:
        value = form["myfield"].value
    except KeyError:
        value = ""
    print value

or use form.getlist("myfield") and then check the length of the returned
list of values.

With both options you also have to decide what to do when 'myfield' is given
twice:

http://localhost/cgi-bin/test.cgi?myfield=42&myfield=24

Peter


From robert.kern at gmail.com  Sun Jan 21 18:22:22 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 21 Jan 2007 17:22:22 -0600
Subject: Reading Fortran Data
In-Reply-To: <1169420913.789301.227430@11g2000cwr.googlegroups.com>
References: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
	<1169420913.789301.227430@11g2000cwr.googlegroups.com>
Message-ID: <ep0sjp$hl4$1@sea.gmane.org>

Eric_Dexter at msn.com wrote:
> I don't know if this is helpfull or not but (or for that matter
> current).  http://cens.ioc.ee/projects/f2py2e/ offers some suggestions
> and it looks like you can use it with c code also.

f2py has been folded into numpy.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From osv at javad.com  Wed Jan 10 14:06:08 2007
From: osv at javad.com (Sergei Organov)
Date: Wed, 10 Jan 2007 22:06:08 +0300
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<1168452879.866265.36880@i39g2000hsf.googlegroups.com>
	<eo3bgm$c98$1@gemini.csx.cam.ac.uk>
Message-ID: <eo3df0$2vk$1@sea.gmane.org>

nmm1 at cus.cam.ac.uk (Nick Maclaren) writes:
> In article <1168452879.866265.36880 at i39g2000hsf.googlegroups.com>,
> "sturlamolden" <sturlamolden at yahoo.no> writes:
[...]
> |> I wonder if too much emphasis is put on thread programming these days.
> |> Threads may be nice for programming web servers and the like, but not
> |> for numerical computing. Reading books about thread programming, one
> |> can easily get the impression that it is 'the' way to parallelize
> |> numerical tasks on computers with multiple CPUs (or multiple CPU
> |> cores). But if threads are inherently designed and implemented to stay
> |> idle most of the time, that is obviously not the case.
>
> You have to distinguish "lightweight processes" from "POSIX threads"
> from the generic concept.  It is POSIX and Microsoft threads that are
> inherently like that,

Do you mean that POSIX threads are inherently designed and implemented
to stay idle most of the time?! If so, I'm afraid those guys that
designed POSIX threads won't agree with you. In particular, as far as I
remember, David R. Butenhof said a few times in comp.programming.threads
that POSIX threads were primarily designed to meet parallel programming
needs on SMP, or at least that was how I understood him.

-- Sergei.



From mike.klaas at gmail.com  Wed Jan 24 18:59:16 2007
From: mike.klaas at gmail.com (Klaas)
Date: 24 Jan 2007 15:59:16 -0800
Subject: The reliability of python threads
In-Reply-To: <mailman.3105.1169664198.32031.python-list@python.org>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
Message-ID: <1169683156.325444.185530@a34g2000cwb.googlegroups.com>



On Jan 24, 10:43 am, "Carl J. Van Arsdall" <cvanarsd... at mvista.com>
wrote:
> Chris Mellon wrote:
> > On 24 Jan 2007 18:21:38 GMT, Nick Maclaren <n... at cus.cam.ac.uk> wrote:
>
> >> [snip]
>
> > I'm aware of the issues with the POSIX threading model. I still stand
> > by my statement - bringing up the problems with the provability of
> > correctness in the POSIX model amounts to FUD in a discussion of
> > actual problems with actual code.
>
> > Logic and programming errors in user code are far more likely to be
> > the cause of random errors in a threaded program than theoretical
> > (I've never come across a case in practice) issues with the POSIX
> > standard.Yea, typically I would think that.  The problem I am seeing is
> incredibly intermittent.  Like a simple pyro server that gives me a
> problem maybe every three or four months.  Just something funky will
> happen to the state of the whole thing, some bad data, i'm having an
> issue tracking it down and some more experienced programmers mentioned
> that its most likely a race condition.  THe thing is, I'm really not
> doing anything too crazy, so i'm having difficult tracking it down.  I
> had heard in the past that there may be issues with threads, so I
> thought to investigate this side of things.
>
> It still proves difficult, but reassurance of the threading model helps
> me focus my efforts.
>
> > Emphasizing this means that people will tend to ignore bugs as being
> > "the fault of POSIX" rather than either auditing their code more
> > carefully, or avoiding threads entirely (the second being what I
> > suspect your goal is).
>
> > As a last case, I should point out that while the POSIX memory model
> > can't be proven safe, concrete implementations do not necessarily
> > suffer from this problem.Would you consider the Linux implementation of threads to be concrete?
>
> -carl
>
> --
>
> Carl J. Van Arsdall
> cvanarsd... at mvista.com
> Build and Release
> MontaVista Software



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Jan 25 10:33:36 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 25 Jan 2007 16:33:36 +0100
Subject: While loop with "or"? Please help!
In-Reply-To: <1169730632.268861.321070@a75g2000cwd.googlegroups.com>
References: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
	<1169730632.268861.321070@a75g2000cwd.googlegroups.com>
Message-ID: <45b8cdcd$0$25927$426a74cc@news.free.fr>

wittempj at hotmail.com a ?crit :
> 
> On Jan 25, 11:26 am, wd.jons... at gmail.com wrote:
(snip)
>> #Runs the buildfinder function
>> usrinp = buildfinder()
>>
>> def buildwhiler():
>>
>>     while usrinp != "y" or "Y" or "N" or "n": <<<<----PROBLEM
>>         print "Enter Y or N!"
>>         usr = str(raw_input('Y/N: '))
>>     else:
>>         code continues
> 
> also note that your naming of variables contains two different names
> for one variable...

Actually, usrinp and usr are really two different vars - the first one 
being global...

And FWIW, it's one of the "other errors" I mentionned earlier <g>



From steve at REMOVEME.cybersource.com.au  Thu Jan  4 00:31:55 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 04 Jan 2007 16:31:55 +1100
Subject: code optimization (calc PI) / Full Code of PI calc in Python and
	C.
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
	<459BFDCB.4000503@sschwarzer.net>
	<UGXmh.194$9v1.250@nntpserver.swip.net>
	<1167872076.937415.250340@11g2000cwr.googlegroups.com>
	<cuYmh.201$9v1.239@nntpserver.swip.net>
Message-ID: <pan.2007.01.04.05.31.54.549423@REMOVEME.cybersource.com.au>

On Thu, 04 Jan 2007 02:10:44 +0100, Michael M. wrote:

> print "\nTiming a 1 million loop 'for loop' ..."
> start = time.clock()
> for x in range(1000000):
>    y = x  # do something

Why not "pass # do nothing"?


> end = time.clock()
> print "Time elapsed = ", end - start, "seconds"

Are you aware that you're timing the CREATION of a rather large list, as
well as the loop?

[snip code]

> #print "".join(pi)
> print pi
> 
> end_prg = time.clock()

and also the time taken for I/O printing the digits? That can be quite
slow.

For timing functions and small snippets of code, you should investigate
the timeit module. It is very flexible, and will often give more accurate
results than roll-you-own timing.

For example:

>>> import timeit
>>> t = timeit.Timer("for i in range(1000000): pass", "pass")
>>> t.timeit(100)  # time the loop one hundred times
29.367985010147095

Now compare it to the speed where you only create the list once.

>>> t = timeit.Timer("for i in L: pass", "L = range(1000000)")
>>> t.timeit(100)
16.155359983444214


-- 
Steven D'Aprano 



From deets at nospam.web.de  Wed Jan  3 12:33:38 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 03 Jan 2007 18:33:38 +0100
Subject: Unsubscribing from the list
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>
	<ene064$bm5$1@sea.gmane.org>
	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>
	<enghj3$qhf$1@sea.gmane.org>
	<mailman.2244.1167841321.32031.python-list@python.org>
Message-ID: <5027niF1dm0f8U1@mid.uni-berlin.de>

Dotan Cohen wrote:

> On 03/01/07, Fredrik Lundh <fredrik at pythonware.com> wrote:
>> if you're unable to follow written instructions, how on earth did you
>> manage to subscribe to this list ?
>>
>> </F>
>>
> 
> Actually, I'm a compete idiot and I always post to the mailing list
> instead of RTFM or STFW. What's the name of that big big website?
> goobble or something?!?
> 
> The first sentance under the heading "Python-list Subscribers" is:
> The subscribers list is only available to the list administrator.
> Admin address: Password:
> 
> As I'm not an admin, I read no further.

Well, you should work on your reading skills then - just a sentence further
the solution lures:

"""
Python-list Subscribers 

(The subscribers list is only available to the list administrator.) 
Enter your admin address and password to visit the subscribers list: 
 Admin address: Password:   Visit Subscriber List

 To unsubscribe from Python-list, get a password reminder, or change your
subscription options enter your subscription email address: 
 Unsubscribe or edit options
"""

So, how about entering your email in that last input field, and
press "Unsubscribe or edit options"

Diez


From martin at v.loewis.de  Mon Jan 29 16:13:19 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 29 Jan 2007 22:13:19 +0100
Subject: python 2.3 module ref
In-Reply-To: <6178735.qJi6sMvOM0@teancum>
References: <6178735.qJi6sMvOM0@teancum>
Message-ID: <45BE636F.6070304@v.loewis.de>

David Bear schrieb:
> Since redhat packages python2.3 with their distro (RHEL 4..) I was looking
> for a module reference for that version. Looking at python.org I only see
> current documentation.
> 
> any pointers to a 2.3 module ref?

http://www.python.org/doc/2.3/
http://www.python.org/doc/2.3/lib/lib.html

Regards,
Martin


From rrr at ronadam.com  Tue Jan 16 10:33:32 2007
From: rrr at ronadam.com (Ron Adam)
Date: Tue, 16 Jan 2007 09:33:32 -0600
Subject: assert versus print [was Re: The curious behavior of integer
	objects]
In-Reply-To: <slrneqpld3.1r4.horpner@FIAD06.norwich.edu>
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>	<mailman.2744.1168901460.32031.python-list@python.org>	<pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>	<76fd5acf0701151838l1a724be5n3f1e1fda629d1464@mail.gmail.com>	<mailman.2762.1168916788.32031.python-list@python.org>	<1168931486.610893.250040@38g2000cwa.googlegroups.com>	<mailman.2772.1168951023.32031.python-list@python.org>
	<slrneqpld3.1r4.horpner@FIAD06.norwich.edu>
Message-ID: <eoirgr$6gn$1@sea.gmane.org>

Neil Cerutti wrote:
 > On 2007-01-16, Ron Adam <rrr at ronadam.com> wrote:
 >> I have to admit that part of why assert seems wrong to me is
 >> the meaning of the word implies something you shouldn't be able
 >> to ignore.  While warnings seem like something that can be
 >> disregarded.
 >
 > Experienced C coders expect assert to behave like that.
 >
 > The only reason (I know of) to turn off error checking is to
 > optimize. However, removing tests won't usually make a big enough
 > speed difference to be worth the burthen of testing two different
 > versions of the same source code.

Ah... but that's the irony.  The whole purpose of the existence of the second
version you refer to, is to better check the first version.  These checks should
not change the flow of code that is executed!

The problem with assert as a debugging tool, is it *can* change the execution
flow by raising a catchable exception.  So you do have *two* versions that may
not behave the same.

Like I suggested earlier, assert should not be turned off *ever*, but should be
considered a nicer way to generate exceptions to do value checks.

And warnings should never change code execution order, but we should be able to
completely turn them off on the byte code level like asserts are when the -O
command line option is given.

I believe both of these features would be used a lot more if they where like this.


 > So to me the assert statement is either dubious syntax-sugar or
 > dangerous, depending on Python's command line arguments.

Yep.. unless you use them in a very limited way.


 > The warning module would seem to have limited applications.
 > Searching my Python distribution shows that it's used for
 > deprecation alerts, and elsewhere for turning those selfsame
 > alerts off. How copacetic! It is the null module. ;-)

I think you understand the point I'm trying to make.  :-)

Ron



From gagsl-py at yahoo.com.ar  Fri Jan 26 22:21:02 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 27 Jan 2007 00:21:02 -0300
Subject: Calling python function from C and import questions
References: <1169844647.673719.25810@j27g2000cwj.googlegroups.com>
Message-ID: <epeh72$nok$1@sea.gmane.org>

<sndive at gmail.com> escribi? en el mensaje 
news:1169844647.673719.25810 at j27g2000cwj.googlegroups.com...

> Is there a better way to make a call from C than
>
> PyRun_SimpleString("import
> foo_in_python\nfoo_in_python.bar(whatever)\n");
>
> I already imported the foo_in_python using PyImport_ImportModule
> and wonder why do I need to keep importing it every time I'm
> calling a python function in that module.

Sure. Use the reference to the module that you got from 
PyImport_ImportModule; you call a method using PyObject_CallMethod or 
similar.

> Does anyone know why does the import tries to load .py files before
> .pyc?
It has to be sure that the .pyc is up-to-date; the .pyc contains a magic 
number and the modification time of the corresponding .py

-- 
Gabriel Genellina 




From caleb.hattingh at gmail.com  Tue Jan 23 06:34:08 2007
From: caleb.hattingh at gmail.com (Caleb Hattingh)
Date: 23 Jan 2007 03:34:08 -0800
Subject: I need suggests
In-Reply-To: <1169551582.196591.48140@v45g2000cwv.googlegroups.com>
References: <1169551582.196591.48140@v45g2000cwv.googlegroups.com>
Message-ID: <1169552048.842059.237800@d71g2000cwa.googlegroups.com>


Pat wrote:
> I have to do a big programm. Could someone give me some suggests about
> IDE (on Linux) and books to learn.

http://groups.google.com/groups/search?q=python+ide&qt_s=Search

Lots and lots to read :)

Caleb



From w.richert at gmx.net  Thu Jan 11 16:01:37 2007
From: w.richert at gmx.net (Willi Richert)
Date: Thu, 11 Jan 2007 22:01:37 +0100
Subject: Pythonic A*-Algorithm
Message-ID: <200701112201.37129.w.richert@gmx.net>

Hi,

I'm looking for an A* implementation in Python (at least some wrapper around a 
C lib). So far I've only found http://arainyday.se/projects/python/AStar/ 
which looks not so promising.

http://wiki.python.org/moin/PythonGraphApi lists all major available graph 
libraries in Python, hoping to find a path to some standard Python graph 
library (as DBAPI). But none of them seems to have a decent A*-implementation 
(at least with Fibonacci-heap, as pqueue is supposed to be).

I know I could implement it myself as it is not that complicated, but I would 
rather like to align my project to some already existing and well established 
graph library containing A*.

Thanks,
wr


From arkanes at gmail.com  Tue Jan  9 11:02:06 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 9 Jan 2007 10:02:06 -0600
Subject: Execute binary code
In-Reply-To: <1168355051.339026.211830@v33g2000cwv.googlegroups.com>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<1168288176.054142.232780@s80g2000cwa.googlegroups.com>
	<slrneq6vga.tcj.grahn+nntp@frailea.sa.invalid>
	<1168355051.339026.211830@v33g2000cwv.googlegroups.com>
Message-ID: <4866bea60701090802w5d55d72boc40180f1ed4c6dbc@mail.gmail.com>

On 9 Jan 2007 07:04:11 -0800, sturlamolden <sturlamolden at yahoo.no> wrote:
>
> Jorgen Grahn wrote:
>
> > For what it's worth[1], under Unix it /is/ impossible. The only way to bring in
> > new code (short of dynamic libraries) is to call exec(2) or its variations,
> > and all need a file system object to load the code from.
>
> The x86 processor cannot tell the difference between code segments and
> data segments. If the executable code is stored in string, all you need
> is a pointer to the string holding the code. You can cast the string
> address to a function pointer (possibly through a void* if the compiler
> complains), then dereference (call) the function pointer.
>
> Trojans, viruses and JIT compilers do this all the time. Here is an
> (untested) example:
>
> static PyObject*
> call_code_in_string(PyObject *self, PyObject *args)
> {
>     char *s;
>     int size;
>     int arg1, arg2, arg3;
>     typedef int (*func_t)(int,int,int);
>     func_t pfunc;
>     if(!PyArg_ParseTuple(args, "s#(iii)", &s, &size, &arg1, &arg2,
> &arg3)) return NULL;
>     pfunc = (func_t)((void *)s); /* if it fails, try
> memcpy(&pfunc,&s,sizeof(void*)) instead */
>     return PyInt_FromLong((long)pfunc(arg1, arg2, arg3));
> }
>
> Another possibility would be to just return the string address, and
> then make the call possibly using ctypes.
>
> static PyObject*
> get_string_addr(PyObject *self, PyObject *args)
> {
>     char *s;
>     int size;
>     if(!PyArg_ParseTuple(args, "s#", &s, &size)) return NULL;
>     return PyInt_FromLong((long)((void*)s));
> }
>

This works fine if the binary data is "pure" asm, but the impresssion
the OP gave is that it's a compiled binary, which you can't just "jump
into" this way.


From bruno.desthuilliers at websiteburo.com  Fri Jan 19 08:34:48 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Fri, 19 Jan 2007 14:34:48 +0100
Subject: variable scope
In-Reply-To: <be5994b50701181059qe0fff1elab2930eb6729d790@mail.gmail.com>
References: <mailman.2873.1169134976.32031.python-list@python.org>	
	<45af9ac4$0$290$426a34cc@news.free.fr>
	<be5994b50701181059qe0fff1elab2930eb6729d790@mail.gmail.com>
Message-ID: <45B0C8F8.50703@websiteburo.com>

gonzlobo a ?crit :
<ot>
Please keep this on clpy...
</ot>

> Sorry, but I don't understand. I *should* pass firstMsg to the
> function like I did (PID_MinMax(firstMsg)), correct?

Yes.

> Then I should
> pass the variable back to the main loop by 'return firstMsg', correct?

s/variable/value/

Yes, you have to return the value from your function. But then, if you 
don't store this value somewhere, it's lost. What you have to understand 
is that you actually have *2* variables named 'firstMsg' : one in the 
'main loop', and one in PID_MinMax(). Rebinding the second name has no 
impact on the first. So you have to explicitely assign the return value 
of PID_MinMax() to the main loop's firstMsg variable. Else, this value 
is simply discarded.

HTH


From ptmcg at austin.rr.com  Sat Jan 27 14:18:24 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 27 Jan 2007 11:18:24 -0800
Subject: extracting from web pages but got disordered words sometimes
In-Reply-To: <1169896727.567159.239160@a34g2000cwb.googlegroups.com>
References: <1169896727.567159.239160@a34g2000cwb.googlegroups.com>
Message-ID: <1169925504.228972.275890@q2g2000cwa.googlegroups.com>

On Jan 27, 5:18 am, "Frank Potter" <could.... at gmail.com> wrote:
> There are ten web pages I want to deal with.
> fromhttp://www.af.shejis.com/new_lw/html/125926.shtml
> to      http://www.af.shejis.com/new_lw/html/125936.shtml
>
> Each of them uses the charset of Chinese "gb2312", and firefox
> displays all of them in the right form, that's readable Chinese.
>
> My job is, I get every page and extract the html title of it and
> dispaly the title on linux shell Termial.
>
> And, my problem is, to some page, I get human readable title(that's in
> Chinese), but to other pages, I got disordered word. Since each page
> has the same charset, I don't know why I can't get every title in the
> same way.
>
> Here's my python code, get_title.py :
>
> [CODE]
> #!/usr/bin/python
> import urllib2
> from BeautifulSoup import BeautifulSoup
>
> min_page=125926
> max_page=125936
>
> def make_page_url(page_index):
>     return ur"".join([ur"http://www.af.shejis.com/new_lw/
> html/",str(page_index),ur".shtml"])
>
> def get_page_title(page_index):
>     url=make_page_url(page_index)
>     print "now getting: ", url
>     user_agent='Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'
>     headers={'User-Agent':user_agent}
>     req=urllib2.Request(url,None,headers)
>     response=urllib2.urlopen(req)
>     #print response.info()
>     page=response.read()
>
>     #extract tile by beautiful soup
>     soup=BeautifulSoup(page)
>     full_title=str(soup.html.head.title.string)
>
>     #title is in the format of "title --title"
>     #use this code to delete the "--" and the duplicate title
>     title=full_title[full_title.rfind('-')+1::]
>
>     return title
>
> for i in xrange(min_page,max_page):
>     print get_page_title(i)
> [/CODE]
>
> Will somebody please help me out? Thanks in advance.

This pyparsing solution seems to extract what you were looking for, 
but I don't know if this will render to Chinese or not.

-- Paul

from pyparsing import makeHTMLTags,SkipTo
import urllib

titleStart,titleEnd = makeHTMLTags("title")
scanExpr = titleStart + SkipTo("- -",include=True) + 
SkipTo(titleEnd).setResultsName("titleChars") + titleEnd

def extractTitle(htmlSource):
    titleSource = scanExpr.searchString(htmlSource, maxMatches=1)[0]
    return titleSource.titleChars


for urlIndex in range(125926,125936+1):
    url = "http://www.af.shejis.com/new_lw/html/%d.shtml" % urlIndex
    pg = urllib.urlopen(url)
    html = pg.read()
    pg.close()
    print url,':',extractTitle(html)


Gives:

http://www.af.shejis.com/new_lw/html/125926.shtml : GSM??????????????
http://www.af.shejis.com/new_lw/html/125927.shtml : GSM
??????????????????
http://www.af.shejis.com/new_lw/html/125928.shtml : GSM??????????
http://www.af.shejis.com/new_lw/html/125929.shtml : 
GSM????????????????????
http://www.af.shejis.com/new_lw/html/125930.shtml : GSM??????????-
??GSM??GPRS??3G ????????
http://www.af.shejis.com/new_lw/html/125931.shtml : GSM?????
?????????????????????????????????
http://www.af.shejis.com/new_lw/html/125932.shtml : ????
????????????????????
http://www.af.shejis.com/new_lw/html/125933.shtml : GSM???????????????
?????????
http://www.af.shejis.com/new_lw/html/125934.shtml : GSM?????????????
???????????????????
http://www.af.shejis.com/new_lw/html/125935.shtml : 
GSM??????WCDMA??????????
http://www.af.shejis.com/new_lw/html/125936.shtml : GSM??????????????



From no-spam at no-spam-no-spam.invalid  Mon Jan  1 09:10:41 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Mon, 01 Jan 2007 15:10:41 +0100
Subject: OO question
In-Reply-To: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
References: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
Message-ID: <enb4p9$9ei$1@news.albasani.net>

fejkadress at hushmail.com wrote:
> If I want to save all addresses to disk, I can have a method, say,
> save() of AddressBook. But then what? What is a good object oriented
> approach? Should each Address object take care of saving itself to the
> file, with a method like writetofile(filename), or should the class
> AddressBook take care of the saving and ask each object for its data?

The OO religion likes to provide a big ego to objects. And be aware! All these egos then want to itch the programmer with question marks for years! And there are programming languages which draw more attention to what some unsolicited objects want, than to what the programmer wants. Python is not so.

Remember, you are the boss. You say: "I want to save all addresses to disk". I'd say: Just dump them to disk unless you feel a functional need in order to make it more indirect. 


Robert


From paddy3118 at netscape.net  Thu Jan 25 15:46:50 2007
From: paddy3118 at netscape.net (Paddy)
Date: 25 Jan 2007 12:46:50 -0800
Subject: The reliability of python threads
In-Reply-To: <7xsldy7u6f.fsf@ruckus.brouhaha.com>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
	<ep9t4g$uf$1@gemini.csx.cam.ac.uk>
	<1169751828.986583.47200@j27g2000cwj.googlegroups.com>
	<epb0s7$g2s$1@gemini.csx.cam.ac.uk>
	<1169754601.992058.205640@q2g2000cwa.googlegroups.com>
	<7xsldy7u6f.fsf@ruckus.brouhaha.com>
Message-ID: <1169758010.223732.272340@k78g2000cwa.googlegroups.com>



On Jan 25, 8:00 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "Paddy" <paddy3... at netscape.net> writes:
> > No, you should think of the service that needs to be up. You seem to be
> > talking about how it can't be fixed rather than looking for ways to
> > keep things going.
> But you're proposing cargo cult programming.
i don't know that term. What I'm proposing is that if, for example, a
process stops running three times in a year at roughly three to four
months intervals , and it should have stayed up; then restart the
server sooner, at aa time of your choosing, whilst taking other
measures to investicate the error.
> There is no reason
> whatsoever to expect that restarting the server now and then will help
> the problem in the slightest.
Thats where we most likely differ. The problem is only indirecctly the
program failing. the customer wants reliable service. Which you can get
from unreliable components. It happens all the time in firmware
controlled systems that periodically reboot themselves as a matter of
course.
> Nick used the fancy term Poisson
> process but it just means that the probability of failure at any
> moment is independent of what's happened in the past, like the
> spontaneous radioactive decay of an atom.  It's not like a mechanical
> system where some part gradually gets worn out and eventually breaks,
> so you can prevent the failure by replacing the part every so often.
Whilst you sit agreeing on how many fairys can dance on the end of a
pin or not Your company could be loosing customers. You and Nick seem
to be saying it *must* be Poisson, therefore we can't do...
>
> > A little learning is fine but "it can't theoretically be fixed" is
> > no solution.The best you can do is identify the unfixable situations precisely and
> work around them.  Precision is important.
I'm sorry, but your argument reminds me of when Western statistical
quality control first met with the Japanese Zero defects methodologies.
We had argued ourselves into accepting a certain amount of defective
cars getting out to customers as the result of our theories. The
Japanese practices emphasized *no* defects were acceptable at the
customer, and they seemed to deliver better made cars.
>
> The next best thing is have several servers running simultaneously,
> with failure detection and automatic failover.
Yah, finally. I can work with that
>
> If a server is failing at random every few months, trying to prevent
> that by restarting it every so often is just shooting in the dark.
"at random" - "every few months"
Me thinking it happens "every few months" allows me to search for a
fix.
If thinking it happens "at random" leads you to a brick wall, then
switch!

> Think of your server stopping now and then because there's a power
> failure, where you get power failures every few months on the average.
> Shutting down your server once a month, unplugging it, and plugging it
> back in will do nothing to prevent those outages.  You need to either
> identify and fix whatever is causing the power outages, or install a
> backup generator.

Yep. I also know that a mad bloke entering the server room with a
hammer every three to four months is also not likely to be fixed by
restarting the server every two months ;-)

- Paddy.



From sturlamolden at yahoo.no  Fri Jan 12 21:18:32 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 12 Jan 2007 18:18:32 -0800
Subject: What is a perl hash in python
In-Reply-To: <mailman.2653.1168622715.32031.python-list@python.org>
References: <8301441.post@talk.nabble.com>
	<mailman.2653.1168622715.32031.python-list@python.org>
Message-ID: <1168654709.254087.310500@m58g2000cwm.googlegroups.com>


Karyn Williams wrote:
> I am new to Pyton. I am trying to modify and understand a script someone
> else wrote. I am trying to make sense of the following code snippet. I know
> line 7 would be best coded with regex. I first would like to understand
> what was coded originally. thelistOut looks like a hash to me (I'm more
> familiar with perl).

thelistOut seems to be a list of tuples. It also seems that one of the
tuple elements are a list containing a single string. To be honest,
this is one of the most ugly examples of Python code I have ever seen.
I am not sure I would trust code written like this at all. One can very
often tell the competence of the programmer from the looks of the code.

To answer the subject: An associative container in Python is called a
'dictionary'. CPython dictonaries are implemented using hash tables
(and one of the fastest hashing algorithms known to man). There is
nothing in the Python semantics that mandates this particular
implementation of dictionaries, though. Balanced binary trees could
have been used instead of hashes, as they usually are in STL's
associative containers, but in CPython a dictionary is implemented with
a hash table under the hood.

Dictionaries work like this:

mydict = { key1 : val1, key2 : val2, key3 : val3 }
oldval3 = mydict[key3] 
mydict[key3] = newval3
mydict[key4] = val4



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Jan  3 14:05:40 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 03 Jan 2007 20:05:40 +0100
Subject: array of class / code optimization
References: <mailman.2221.1167763760.32031.python-list@python.org>
	<AOPmh.83$9v1.124@nntpserver.swip.net>
Message-ID: <502d44F1d5nvlU2@mid.individual.net>

mm wrote:

> But I was looking for a "struct" equivalent like in c/c++.
> And/or "union". I can't find it.

class Honk(object):
    pass

test = Honk()
test.spam = 4
test.eggs = "Yum"

Is it this what you're looking for?

> Maybe you know a source (URL) "Python for c/c++ programmers" or
> things like that.

Have a look at "Learning Python" by Mark Lutz and David Ascher. I
found it very helpful because they often refer to C/C++.

Regards,


Bj?rn

-- 
BOFH excuse #344:

Network failure -  call NBC



From banaouas.medialog at wanadoo.fr  Tue Jan 16 18:45:53 2007
From: banaouas.medialog at wanadoo.fr (m.banaouas)
Date: Wed, 17 Jan 2007 00:45:53 +0100
Subject: urllib2 and HTTPBasicAuthHandler
In-Reply-To: <mailman.2789.1168970662.32031.python-list@python.org>
References: <45acf775$0$5070$ba4acef3@news.orange.fr>
	<mailman.2789.1168970662.32031.python-list@python.org>
Message-ID: <45ad6309$1$27408$ba4acef3@news.orange.fr>

Max,
I verified and determined that Zope realm is "Zope", by tcp spy tool 
witch shows me the server headers.
Actually, I tried differents ways without success.
It seems like it's not so easy to negociate a basic authentication 
process with urllib2, while it's based on very simple specifications, 
however urllib2 is considered as one of the most powerfull library in 
its category.

You suggest to use default realm:
   # this creates a password manager
   passman = urllib2.HTTPPasswordMgrWithDefaultRealm()
   # because we have put None at the start it will always use this 
username/password combination
   passman.add_password(None, auth_url, data['user'] , data['pass'])
   # create the AuthHandler
   auth_handler = urllib2.HTTPBasicAuthHandler(passman)
   # build an 'opener' using the handler we've created
   opener = urllib2.build_opener(auth_handler)
   urllib2.install_opener(opener)
   req = urllib2.Request(url)
   f = urllib2.urlopen(req)
   data = f.read()
   print data
but it doesn't work: urllib2.HTTPError: HTTP Error 401: Unauthorized

Max Erickson a ?crit :
> "m.banaouas" <banaouas.medialog at wanadoo.fr> wrote:
> 
>> Hi all,
>> I started to use urllib2 library and HTTPBasicAuthHandler class
>> in order to authenticate with a http server (Zope in this case).
>> I don't know why but it doesn't work, while authenticating with
>> direct headers manipulation works fine!
>>
> ...
>> port':'8080','path':'manage','realm':'Zope'} 
>>    url = '%(prot)s://%(host)s:%(port)s/%(path)s' % data
> ...
> 
> Are you certain that the realm on the server matches 'Zope'?
> 
> HTTPBasicAuthHandler uses the realm to look for the password, if the 
> realm the server provides is different, urllib2 will respond as if it 
> does not have a user/password.
> 
> If you are only doing one request, it isn't that big a deal; if you 
> are doing many requests or want urllib2 to handle the response for 
> other reseans, you can use a default realm, see the bottom of this 
> example:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/305288
> 
> (The advantage of using a default rather than making sure the realm is 
> correct is that it can change and you won't have to do anything)
> 
> 
> 
> max
> 


From toreriks at hotmail.com  Thu Jan 25 05:16:31 2007
From: toreriks at hotmail.com (Tor Erik Soenvisen)
Date: Thu, 25 Jan 2007 10:16:31 +0000 (UTC)
Subject: str and __setitem__
Message-ID: <Xns98C372B2DD26Btoreriknpolarno@129.242.5.222>

Hi,

What do I need to do to make the code below work as expected:

class str2(str):

	def __setitem__(self, i, y):
		assert type(y) is str
		assert type(i) is int
		assert i < len(self)

		self = self[:i] + y + self[1+i:]


a = str2('123')
a[1] = '1'
print a
123


The print statement should return 113

Regards tores


From snewman18 at gmail.com  Wed Jan 10 12:38:43 2007
From: snewman18 at gmail.com (snewman18 at gmail.com)
Date: 10 Jan 2007 09:38:43 -0800
Subject: Universal Feed Parser - How do I keep attributes?
Message-ID: <1168450723.340213.235690@o58g2000hsb.googlegroups.com>

I'm trying to use FeedParser to parse out Yahoo's Weather Data. I need
to capture some attribute values, but it looks like FeedParser strips
them out. Is there any way to keep them?

XML Snippet:
...
<yweather:location city="Sunnyvale" region="CA" country="US" />
...

When I try to get the value, it's empty:

>>> d = feedparser.parse('http://weather.yahooapis.com/forecastrss?p=94089')
>>> d.feed.yweather_location
u''



From wangshuhao at sina.com  Wed Jan 24 02:58:02 2007
From: wangshuhao at sina.com (Wang Shuhao)
Date: Wed, 24 Jan 2007 15:58:02 +0800
Subject: sys.path issue in cygwin
Message-ID: <001501c73f8d$63edb590$14fd0179@WANGSHUHAO>

I successfully built and installed Python 2.2.3 in cygwin. But there is something wrong in the sys.path. I use following statments for a test.

>>> import sys
>>> print sys.path
['', 'C/lib/python2.2/', 'C/lib/python2.2/plat-cygwin', 'C/lib/python2.2/lib-tk'
, '\\Python24/lib/python2.2/lib-dynload']
>>>

To keep the question simple, I've set PATH= in cygwin.bat to avoid python initialze sys.path from Windows' PATH environment.

Obviously, 'C/lib/python2.2/' is a wrong path. In fact my python is installed in /usr/local/lib/python2.2.3. The result of the issue is that when you run a program python can't find the module. So what I really want to know is where these path came from and how to fix it.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070124/835eba3d/attachment.html>

From http  Thu Jan 25 16:16:59 2007
From: http (Paul Rubin)
Date: 25 Jan 2007 13:16:59 -0800
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
	<ep9t4g$uf$1@gemini.csx.cam.ac.uk>
	<1169751828.986583.47200@j27g2000cwj.googlegroups.com>
	<epb0s7$g2s$1@gemini.csx.cam.ac.uk>
	<1169754601.992058.205640@q2g2000cwa.googlegroups.com>
	<7xsldy7u6f.fsf@ruckus.brouhaha.com>
	<1169758010.223732.272340@k78g2000cwa.googlegroups.com>
Message-ID: <7xveiu4xis.fsf@ruckus.brouhaha.com>

"Paddy" <paddy3118 at netscape.net> writes:
> > But you're proposing cargo cult programming.
> i don't know that term.

http://en.wikipedia.org/wiki/Cargo_cult_programming

> What I'm proposing is that if, for example, a process stops running
> three times in a year at roughly three to four months intervals ,
> and it should have stayed up; then restart the server sooner, at aa
> time of your choosing,

What makes you think that restarting the server will make it less
likely to fail?  It sounds to me like there's zero evidence of that,
since you say "roughly three or four month intervals" and talk about
threading and race conditions.  If it's failing every 3 months, 15
days and 2.43 hours like clockwork, that's different, sure, restart it
every three months.  But the description I see so far sounds like a
random failure caused by some events occurring with low enough
probability that they only happen on average every few months of
operation.  That kind of thing is very common and is often best
diagnosed by instrumenting the hell out of the code.

> > There is no reason whatsoever to expect that restarting the server
> > now and then will help the problem in the slightest.
> Thats where we most likely differ.

Do you think there is a reason to expect that restarting the server
will help the problem in the slightest?  I realize you seem to expect
that, but you have not given a REASON.  That's what I mean by cargo
cult programming.

> Whilst you sit agreeing on how many fairys can dance on the end of a
> pin or not Your company could be loosing customers. You and Nick seem
> to be saying it *must* be Poisson, therefore we can't do...

I dunno about Nick, I'm saying it's best to assume that it's Poisson
and do whatever is necessary to diagnose and fix the bug, and that the
voodoo measure you're proposing is not all that likely to help and it
will take years to find out whether it helps or not (i.e. restarting
after 3 months and going another 3 months without a failure proves
nothing).

> I'm sorry, but your argument reminds me of when Western statistical
> quality control first met with the Japanese Zero defects methodologies.
> We had argued ourselves into accepting a certain amount of defective
> cars getting out to customers as the result of our theories. The
> Japanese practices emphasized *no* defects were acceptable at the
> customer, and they seemed to deliver better made cars.

I don't see your point.  You're the one who wants to keep operating
defective software instead of fixing it.

> "at random" - "every few months"
> Me thinking it happens "every few months" allows me to search for a
> fix.  If thinking it happens "at random" leads you to a brick wall,
> then switch!

But you need evidence before you can say it happens every few months.
Do you have, say, a graph of the exact dates and times of failure, the
number of requests processed so far, etc.?  If it happened at some
exact or almost exact uniform time interval or precisely once every
1.273 million requests or whatever, that tells you something.  But the
earlier description didn't sound like that.  Restarting the server is
not much better than carrying a lucky rabbit's foot.


From robert.kern at gmail.com  Fri Jan  5 01:19:31 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 05 Jan 2007 00:19:31 -0600
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <103909CE-118D-428A-B865-46896785A30E@cs.hmc.edu>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>	<7.0.1.0.0.20070105004837.05b36d98@yahoo.com.ar>	<459DCC77.2030708@gmx.net>
	<103909CE-118D-428A-B865-46896785A30E@cs.hmc.edu>
Message-ID: <enkqln$sp4$1@sea.gmane.org>

belinda thom wrote:

> I imagine the NotImplementedError is actually a defined object, but I  
> really don't know.

It is.

> So, back to my question: is a catalog of standard python errors  
> available? I've looked on the python site but had no success.

http://docs.python.org/lib/module-exceptions.html

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From the_pakage_4u at yahoo.com  Sat Jan 13 15:28:28 2007
From: the_pakage_4u at yahoo.com (GGG Promo)
Date: Sat, 13 Jan 2007 20:28:28 GMT
Subject: ^*^*^^ Free Girls Gone Wild Videos ^*^*^*^
Message-ID: <Mhbqh.623445$1T2.14028@pd7urf2no>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070113/6fdd863c/attachment.html>

From gagsl-py at yahoo.com.ar  Wed Jan  3 19:02:37 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 03 Jan 2007 21:02:37 -0300
Subject: type classobj not defined?
In-Reply-To: <eec9f8ee0701030857o6218f87bpc40f63c62575098d@mail.gmail.co
 m>
References: <eec9f8ee0701030857o6218f87bpc40f63c62575098d@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070103204620.05595be8@yahoo.com.ar>

At Wednesday 3/1/2007 13:57, Wesley Brooks wrote:

> >type(b)
><type 'classobj'>
>
>But the following fails:
>
> >type(b) == classobj
>Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>NameError: name 'classobj' is not defined

Do you want to test if you got a `b` class, or just for any class? 
See inspect.isclass for the latter.

>For the time being I'll use b.__name__ == b to ensure I'm getting the
>right class. Is there a reason why the other types such as bool are
>defined but classobj isn't?

Usually, Python code doesn't care if you pass the exact class 
designed. If a function writes some text to a file that it gets as an 
argument, it doesn't care whether it gets a file object or some other 
kind of object, as far as it has a suitable write() method.
If you positively have to check for the class, checking types with == 
is not a good idea. Use isinstance or issubclass instead, they check 
for derived classes too. A derived class can (or could) always be 
used wherever a base class is suitable.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From stuart at bmsi.com  Thu Jan 25 21:12:40 2007
From: stuart at bmsi.com (Stuart D. Gathman)
Date: Thu, 25 Jan 2007 21:12:40 -0500
Subject: doctest problem with null byte
Message-ID: <pan.2007.01.26.02.12.39.635773@bmsi.com>

I am trying to create a doctest test case for the following:

def quote_value(s):
    """Quote the value for a key-value pair in Received-SPF header field
    if needed.  No quoting needed for a dot-atom value.

    >>> quote_value(r'abc\def')
    '"abc\\\\\\\\def"'
    >>> quote_value('abc..def')
    '"abc..def"'
    >>> quote_value('')
    '""'
    >>> quote_value('-all\x00')
    '"-all\\\\\\\\x00"'
    ...

However, doctest does *not* like the null byte in the example (yes, this
happens with real life input):
**********************************************************************
File "/home/stuart/pyspf/spf.py", line 1453, in spf.quote_value
Failed example:
    quote_value('-all')
Exception raised:
    Traceback (most recent call last):
      File "/var/tmp/python2.4-2.4.4c1-root/usr/lib/python2.4/doctest.py",
	line 1248, in __run
        compileflags, 1) in test.globs
    TypeError: compile() expected string without null bytes
**********************************************************************

How can I construct a test cast for this?

-- 
	      Stuart D. Gathman <stuart at bmsi.com>
Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.



From rpdooling at gmail.com  Fri Jan 12 16:37:15 2007
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 12 Jan 2007 13:37:15 -0800
Subject: What is a perl hash in python
In-Reply-To: <mailman.2674.1168636455.32031.python-list@python.org>
References: <fPQph.10106$yx6.6344@newsread2.news.pas.earthlink.net>
	<8301441.post@talk.nabble.com>
	<mailman.2653.1168622715.32031.python-list@python.org>
	<mailman.2674.1168636455.32031.python-list@python.org>
Message-ID: <1168637835.447276.21620@v45g2000cwv.googlegroups.com>

Karyn Williams wrote:
>
> For future reference, why is direct use of the string module frowned upon,
> and what does one use instead ?
> 

Karyn, 

http://docs.python.org/lib/node42.html

rd



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan  8 12:26:20 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 08 Jan 2007 18:26:20 +0100
Subject: Books,resources..
References: <entoit$d5b$1@aioe.org>
Message-ID: <50fd5sF1fki7dU1@mid.individual.net>

Tarique wrote:

> so can you please suggest some standard references for python
> considering that i have some programming experience 

I like "Learning Python" by Mark Lutz and David Ascher. They refer
to C/C++ many times.

Also try "Dive into Python" for a more fast-paced introduction
and "Python in a Nutshell" for a good reference.

Regards,


Bj?rn

-- 
BOFH excuse #380:

Operators killed when huge stack of backup tapes fell over.



From jgodoy at gmail.com  Sat Jan 13 08:22:00 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sat, 13 Jan 2007 11:22:00 -0200
Subject: Barcode recognition in Python
References: <1168676514.115592.181620@v45g2000cwv.googlegroups.com>
Message-ID: <87zm8n6ozr.fsf@gmail.com>

"PaoloB" <pibizza at gmail.com> writes:

> Hi everyone,
>
> I am searching for a python library for barcode recognition. We have
> developed a rather complex application for document tracking and
> document management in python/Zope, called PAFlow (www.paflow.it:
> sorry, most of the information is in Italian...).
>
> As our project is completely free software, we will need a library that
> is free software too.
>
> Is there something like this in python ?

Sorry, but what do you mean by "barcode recognition"?  A barcode reader
already decodes the barcode and sends the decoded output.  If it is one
plugged in a keyboard port, for example, reading the barcode or typing the
"message" is exactly the same thing.

Or are you willing some kind of OCR to process the barcodes without a barcode
reader (why having barcodes then?)?  

-- 
Jorge Godoy      <jgodoy at gmail.com>


From sean at datafly.net  Thu Jan 25 20:08:48 2007
From: sean at datafly.net (Sean Schertell)
Date: Fri, 26 Jan 2007 10:08:48 +0900
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <ep8ucs$g4a$1@sea.gmane.org>
References: <ep60jp$63v$1@aioe.org>
	<45b72b0d$0$5107$ba4acef3@news.orange.fr>	<e75321bd0701241533ie528b15p42a0a75bd0666c2d@mail.gmail.com>
	<49E1CCC0-D22F-4411-B192-429E42045578@datafly.net>
	<ep8ucs$g4a$1@sea.gmane.org>
Message-ID: <0680E0C6-89DC-47F0-9010-2230C916951E@datafly.net>

That's really exciting! Thanks for the tip.

Sean



On Jan 25, 2007, at 9:42 AM, Robert Kern wrote:

> Sean Schertell wrote:
>> Not to totally hijack the thread -- but since you're all talking
>> about best GUI frameworks. Any thoughts on the best looking framework
>> for OS X only? Is there any way to write little Python apps that will
>> launch in OS X using OS X widgets?
>
> Use PyObjC. You have full access to the Cocoa framework.
>
>   http://pyobjc.sourceforge.net/
>
> --  
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a  
> harmless enigma
>  that is made terrible by our own mad attempt to interpret it as  
> though it had
>  an underlying truth."
>   -- Umberto Eco
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list

::::  DataFly.Net  ::::
Complete Web Services
http://www.datafly.net



From scott at crybabymaternity.com  Sun Jan  7 13:33:50 2007
From: scott at crybabymaternity.com (scott at crybabymaternity.com)
Date: 7 Jan 2007 10:33:50 -0800
Subject: Newbie XML SAX Parsing: How do I ignore an invalid token?
In-Reply-To: <459f5e14$0$17107$9b622d9e@news.freenet.de>
References: <1168033818.692201.183790@11g2000cwr.googlegroups.com>
	<mailman.2354.1168037149.32031.python-list@python.org>
	<1168054226.290465.325910@s34g2000cwa.googlegroups.com>
	<459f5e14$0$17107$9b622d9e@news.freenet.de>
Message-ID: <1168194830.741912.300290@51g2000cwl.googlegroups.com>

Thanks, I'll work with the file on the file system, then parse it with
SAX.

Is there a Pythonic way to read the file and identify any illegal XML
characters so I can strip them out? this would keep my program more
flexible - if the vendor is going to allow one illegal character in
their document, there's no way of knowing if another one will pop up
later.

Thanks!


Martin v. L?wis wrote:
> scott at crybabymaternity.com schrieb:
> > My original posting has a funky line break character (it appears as an
> > ascii square) that blows up my program, but it may or may not show up
> > when you view my message.
>
> Looking at your document, it seems that this "funky line break
> character" is character \x1E, which, in latin-1, means "record
> separator". It's indeed ill-formed to use it in XML.
>
> > Is there a way to account for the invalid token in the error handler?
>
> Not with a standard XML parser, no. The error you describe is a "fatal
> error", and that's not something parsing can recover from. I recommend
> that you filter this character out before passing it to the XML parser.
> You can use the IncrementalParser interface to do so.
> 
> Regards,
> Martin



From practicalperl at gmail.com  Sat Jan 20 06:00:09 2007
From: practicalperl at gmail.com (Jm lists)
Date: Sat, 20 Jan 2007 19:00:09 +0800
Subject: Does eval has the same features as Perl's?
In-Reply-To: <pan.2007.01.20.10.45.31.333567@REMOVE.THIS.cybersource.com.au>
References: <mailman.2937.1169285428.32031.python-list@python.org>
	<pan.2007.01.20.10.45.31.333567@REMOVE.THIS.cybersource.com.au>
Message-ID: <fbe35f750701200300kf758edftcd2f9888d396d4a8@mail.gmail.com>

Thank you.I'm just learning Python and want to make something clear to me.:)

2007/1/20, Steven D'Aprano <steve at remove.this.cybersource.com.au>:
> On Sat, 20 Jan 2007 17:30:24 +0800, Jm lists wrote:
>
> > Hello members,
> >
> > I want to know does the "eval" in python have the same features as in
> > Perl (capture errors)?
> >
> > For example,in perl I can wrote:
> >
> > $re = eval { 1 / 0 };
> >
> > Though 1/0 is a fatal error but since it's in "eval" block so the perl
> > interpreter doesn't get exit.
>
> How hard would it be to actually try it?
>
> >>> eval("1/0")
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "<string>", line 1, in <module>
> ZeroDivisionError: integer division or modulo by zero
>
> It took about three seconds to actually test it.
>
> eval has many security risks -- as a rule, you should never pass strings
> you've got from the user to eval, unless you want the user to p0wn your
> computer. It is harder than you might think to make eval safe -- you
> should seriously consider it an advanced tool, not a basic tool. As a
> newbie, you should work under the following rule:
>
> "If I think I need to use eval, I'm probably wrong."
>
> I've been using Python for seven or eight years, and I don't think I've
> ever used eval in serious code.
>
> Now, suppose you find yourself wanting to use eval. You've considered the
> above rule carefully, and decided that it doesn't apply in this case.
> You've been careful to use it only on safe strings, not arbitrary strings
> from users. How do you use eval so it captures errors?
>
> try:
>     eval("1/0")
> except ZeroDivisionError: # capture only one error
>     pass
>
>
> or something like this:
>
> try:
>     eval("something or other goes here")
> except Exception: # capture any error
>     pass
>
>
>
> --
> Steven.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From stj911 at rock.com  Tue Jan 30 16:52:35 2007
From: stj911 at rock.com (stj911 at rock.com)
Date: 30 Jan 2007 13:52:35 -0800
Subject: Secret Technology of THERMATE and 911 Crime
In-Reply-To: <1170127646.046184.213690@k78g2000cwa.googlegroups.com>
References: <1170127646.046184.213690@k78g2000cwa.googlegroups.com>
Message-ID: <1170193955.284265.13850@a75g2000cwd.googlegroups.com>

Thanks for this great link

On Jan 29, 7:27 pm, therm... at india.com wrote:
> Excellent Technology, and photos:
>
> http://stj911.org/jones/focus_on_goal.html
>
> As scientists, we look at the evidence, perform experiments, and apply
> the Scientific Method. The Greek method was to look at the evidence
> (superficially) and then try to explain things through logic and
> debate. The Greeks came up with various ideas in this way -- such as
> the geocentric theory in which the Earth was at the center of the
> universe, and all the stars and planets revolved around the earth.
> There were problems with this geocentric explanation, but Plato
> insisted that they must "save the hypothesis," and plausible
> explanations were found to account for anomalies -- i such as the
> retrograde motion of Mars. The philosophical debates and discussions
> were seemingly endless; the Dark Ages ensued.
>
> Along came Copernicus, Galileo, Newton and others with their
> experiments and observations, and the centuries-old Greek philosophy-
> based notions began to crumble. Galileo observed through a telescope
> that Jupiter had moons -- which revolved around Jupiter (not the
> Earth). He was threatened with torture if he did not recant his
> explanation (that the Earth was not at the center). He suffered house
> arrest but not torture as he quietly continued his experiments.
>
> In the lifetime of Newton, another experimenter who challenged the
> Greek approach, the scientific community worked out a system whereby
> scientific studies would be published after review by peers --
> qualified experts who could judge the quality of the research. Peer-
> reviewed technical journals arose and the peer-review process brought
> order to the relative chaos of work up to that time. Now experiments
> could be done and written up, then peer-reviewed and published. Peer-
> reviewed papers would draw the attention of others. To give an example
> of using the modern scientific method, a few colleagues and I are
> doing experiments and making observations in a scientific approach to
> what really happened at the World Trade Center. It is NOT merely a
> plausible explanation or debates about "possibilities" that we seek.
> Rather, having seen strong indications of foul play (see
> journalof911studies.com/Intersecting_facts_and_Theories_on_911.pdf )
> we are looking for hard evidence that would clearly verify an
> intentional crime beyond that of 19 hijackers. Ours is a forensic
> investigation, looking for a "smoking gun," which would then lead to a
> serious criminal investigation.
>
> I do not plan to make a career out of 9/11 research, and I am not
> making money from my investigations anyway. We need a formal, solid
> investigation of the 9/11 crimes committed, not a long-term study
> which endlessly debates all alternatives. I seek such solid evidence
> of an insider crime (beyond a reasonable doubt) that some of us will
> successfully demand a criminal investigation to confront key
> individuals who may have insider information -- within one year, if
> possible-- not many.
>
> So what evidence is likely to lead to such a criminal investigation?
>
> As identified in my talk at the University of California at Berkeley,
> there are four areas of 9/11 research that are so compelling that they
> may quickly lead to the goal of a solid investigation of 9/11 as an un-
> solved crime scene. These four areas are:
>
>    1. Fall time for WTC 7.
>    2. Fall times for the Towers.
>    3. Challenging the NIST report and Fact Sheet.
>    4. Evidence for use of Thermate reactions: What the WTC dust and
> solidified metal reveal.
>
>     * Please note that I do not focus only on the thermate-hypothesis,
> and I do research in all four areas above. Details are given in my
> talk, available here:www.911blogger.com/node/4622Also:
> video.google.com/videoplay?docid=9210704017463126290 )
>
> There are other lines that may compel a criminal investigation even
> before one of the above "hard science" research lines bears fruit:
>
>    5. Whistleblower statements -- including some individuals yet to
> emerge.
>    6. Who made the stock-market "put-option" trades on American and
> United Air Lines in the week before 9/11, indicating clear
> foreknowledge of the attacks coupled with greed?
>    7. The fact that the WTC dust was declared quite safe by the EPA/
> National Security Council when it fact scientists had proven it to be
> toxic, and the many people now clamoring for justice after being hurt
> and misled.
>    8. Calls for impeachment for war issues, e.g., from a state
> legislature or Congress, which scrutinizes the "Bush Doctrine," then
> opens the 9/11 question.
>    9. Pressure from 9/11 Family members, firemen and others for
> answers.
>   10. Direct appeals to Senators and Congresspersons -- who are
> charged with an oversight role. I initiated a Petition to this effect,
> demanding release of government-held information related to 9/11,
> which has since been signed by over 10,000 people. And I am in contact
> now with the Congressman from my state, seeking information and
> remedy.
>
> We have found evidence for thermates in the molten metal seen pouring
> from the South Tower minutes before its collapse, in the sulfidation
> and high-temperature corrosion of WTC steel, and in the residues found
> in the WTC dust. (Our sample originated from an apartment at 113 Cedar
> Street across from the WTC; chain of custody direct from the collector
> J. MacKinlay to Dr. Steven Jones). Many other details are given in the
> peer-reviewed paper here: journalof911studies.com/volume/200609/
> WhyIndeedDidtheWorldTradeCenterBuildingsCompletelyCollapse.pdf . Other
> cutter-charges such as HMX and RDX may have also been used; but again,
> solid evidence for just one type of incendiary or explosive would be
> sufficient to compel a criminal investigation.
>
> Experiments continue, as shown in the photos below, and the results
> are consistent with thermate having been used in on 9/11/2001. We have
> a series of experiments planned, along with analyses. This research
> takes time.
> Above: In a fraction of a second, thermate cuts horizontally through a
> steel cup. Notice the high-temperature corrosion which occurred.
>
> Right: 1999: "Invention offers a thermite based apparatus and method
> for cutting target material [eg, steel] of a substantial thickness ...
> linear.. cutting action ..." A prototype has been used to cut through
> a steel I-beam.
>
> Below: Proof of Concept. The photograph below shows the one-hole proto-
> type device I built to produce a thermate-jet. Thermate is the red
> powder in the steel base. The prototype worked well, and the thermate-
> jet cut through a piece of structural steel in a fraction of a second.




From gagsl-py at yahoo.com.ar  Sun Jan 14 11:51:58 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 14 Jan 2007 13:51:58 -0300
Subject: Decorators inside of class and decorator parameters
References: <1168728983.541526.202320@l53g2000cwa.googlegroups.com><mailman.2703.1168747644.32031.python-list@python.org>
	<1168763727.677028.149640@51g2000cwl.googlegroups.com>
Message-ID: <eodn3c$3pc$1@sea.gmane.org>

"Michele Simionato" <michele.simionato at gmail.com> escribi? en el mensaje 
news:1168763727.677028.149640 at 51g2000cwl.googlegroups.com...
> Gabriel Genellina wrote:
>> see this article by M. Simoniato
>> http://www.phyast.pitt.edu/~micheles/python/documentation.html for a 
>> better
>> way using its decorator factory.
>
> Actually the name is Simionato ;)

Oh, sorry! I think I've written it wrong in another place too :(

-- 
Gabriel Genellina 





From Jeff.Demel at JavelinDirect.com  Thu Jan 11 10:22:49 2007
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Thu, 11 Jan 2007 09:22:49 -0600
Subject: Learning Python book, new edition?
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734C186@DMSP-MSG-EVS01.mail.pvt>

Does anyone know if there's a plan in the works for a new edition of
Learning Python?  The current edition (2nd) is a few years old and looks
like it only covers Python 2.3.

Anyone on the list have Lutz's ear?

-Jeff
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From __peter__ at web.de  Wed Jan 17 08:46:03 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 17 Jan 2007 14:46:03 +0100
Subject: generate tuples from sequence
References: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>
Message-ID: <eol9ac$v3l$02$1@news.t-online.com>

Will McGugan wrote:

> I'd like a generator that takes a sequence and yields tuples containing
> n items of the sqeuence, but ignoring the 'odd' items. For example
> 
> take_group(range(9), 3) -> (0,1,2) (3,4,5) (6,7,8)

I like

>>> items = range(9)
>>> N = 3
>>> zip(*[iter(items)]*N)
[(0, 1, 2), (3, 4, 5), (6, 7, 8)]

Peter


From practicalperl at gmail.com  Fri Jan 19 22:51:45 2007
From: practicalperl at gmail.com (Jm lists)
Date: Sat, 20 Jan 2007 11:51:45 +0800
Subject: **argv can't work
In-Reply-To: <9d6d3deb0701191944k604a6ff8u3cea7c88cbe45f04@mail.gmail.com>
References: <fbe35f750701191920g4c28e44bjee5789ff346223b7@mail.gmail.com>
	<9d6d3deb0701191944k604a6ff8u3cea7c88cbe45f04@mail.gmail.com>
Message-ID: <fbe35f750701191951h2dc07237nc96af186793b853e@mail.gmail.com>

Thanks for all the kind helps!

2007/1/20, Parthan SR <python.technofreak at gmail.com>:
>
>
> On 1/20/07, Jm lists <practicalperl at gmail.com> wrote:
> > hello members,
> >
> > See my script piece below:
> >
> > def testB(shift,**argv):
> >     print "first argument is %s" %shift
> >     print "all other arguments are:",argv
> >
> > testB('mails','Jen',' Jen at att.com','Joe','Joe at aol.com')
> >
> > It can't work at all.please help tell me the reasons.thanks.
> >
> >
>
> It works for me, check this one :
>
> >>> def argtst(x, **y):
> ...     print "first arument is %s" % x
> ...     print "other arguments are", y
> ...
> >>> argtst(x=10,a=1,b=2,c=3)
> first arument is 10
> other arguments are {'a': 1, 'c': 3, 'b': 2}
>
>
> (!) : Do not use the name 'argv' for the second argument.
>
> --
> With Regards,
>
> TechnoFreak
>
>


From steve at REMOVEME.cybersource.com.au  Wed Jan 31 22:11:32 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 01 Feb 2007 14:11:32 +1100
Subject: division by 7 efficiently ???
References: <1170297774.859006.29490@a75g2000cwd.googlegroups.com>
Message-ID: <pan.2007.02.01.03.11.32.214726@REMOVEME.cybersource.com.au>

On Wed, 31 Jan 2007 18:42:54 -0800, krypto.wizard wrote:

> How to divide a number by 7 efficiently without using - or / operator.
> We can use the bit operators. I was thinking about bit shift operator
> but I don't know the correct answer.

I'd be surprised if there was a trick for dividing by seven efficiently...
it is one of the "difficult" cases. See:

http://www.bitwisemag.com/copy/wilf/wilf5.html

for a discussion.

But even if there is some nifty algorithm for efficiently dividing by
seven using bit operators, I don't expect it will work efficiently in
Python. The overhead of using objects will probably outweigh any saving
you might get by using magic tricks, so you should just use division.

It is like using the XOR trick for swapping integers: there's just no
point in doing it in Python except as a trick, because it is slower than
just swapping them:

>>> timeit.Timer("x = x^y; y = x^y; x= x^y", "x, y = 1, 2").repeat()
[0.88827300071716309, 0.85192012786865234, 0.81278204917907715]
>>> timeit.Timer("x, y = y, x", "x, y = 1, 2").repeat()
[0.71292495727539062, 0.65545105934143066, 0.68413901329040527]


-- 
Steven D'Aprano 



From gagsl-py at yahoo.com.ar  Thu Jan 18 10:12:52 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 18 Jan 2007 12:12:52 -0300
Subject: Asyncore select statement problem
References: <1169075120.491855.103200@q2g2000cwa.googlegroups.com>
Message-ID: <eoo2pm$rl$1@sea.gmane.org>

"JamesHoward" <James.w.Howard at gmail.com> escribi? en el mensaje 
news:1169075120.491855.103200 at q2g2000cwa.googlegroups.com...

>I have a problem with python's asyncore module throwing a bad file
> descriptor error.  The code might be difficult to copy here, but the
> problem is essentially:
>
> The server wants to sever the connection of an open Asyncore socket.
> Calling the socket.close() nor the socket.shutdown(2) calls seem to
> work.  The only way I can close the connection without creating the
> error below is to have the client close the connection.

You have to use the dispatcher's close() method, else, the asyncore map 
won't be updated, keeping a reference to the closed socket.

-- 
Gabriel Genellina 




From ptmcg at austin.rr.com  Wed Jan 24 15:24:31 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 24 Jan 2007 12:24:31 -0800
Subject: Simple Matrix class
In-Reply-To: <mailman.3108.1169668074.32031.python-list@python.org>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>
	<mailman.3049.1169600368.32031.python-list@python.org>
	<1169602411.917985.89840@l53g2000cwa.googlegroups.com>
	<mailman.3051.1169604934.32031.python-list@python.org>
	<1169617221.481444.135820@v45g2000cwv.googlegroups.com>
	<mailman.3094.1169659321.32031.python-list@python.org>
	<1169664540.120687.211350@s48g2000cws.googlegroups.com>
	<mailman.3108.1169668074.32031.python-list@python.org>
Message-ID: <1169670271.547292.141110@l53g2000cwa.googlegroups.com>

On Jan 24, 1:47 pm, Robert Kern <robert.k... at gmail.com> wrote:
> Paul McGuire wrote:
> > And the purpose/motivation for "reimplementing it better" would be
> > what, exactly?  So I can charge double for it?
>
> So you can have accurate results, and you get a good linear solver out of the
> process. The method you use is bad in terms of accuracy as well as efficiency.
>

Dang, I thought I was testing the results sufficiently!  What is the
accuracy problem?  In my test cases, I've randomly created test
matrices, inverted, then multiplied, then compared to the identity
matrix, with the only failures being when I start with a singular
matrix, which shouldn't invert anyway.

One of the main reasons I wrote this was as a simple linear solver for
small order problems, so I would like this to at least be able to do
_that_.  Efficiency aside, I thought I was at least getting the right
answer...

-- Paul



From theller at ctypes.org  Tue Jan  2 11:59:38 2007
From: theller at ctypes.org (Thomas Heller)
Date: Tue, 02 Jan 2007 17:59:38 +0100
Subject: Python Wrapper for C# Com Object
In-Reply-To: <1167313715.296081.133170@n51g2000cwc.googlegroups.com>
References: <1167297178.937748.91790@79g2000cws.googlegroups.com>
	<1167313715.296081.133170@n51g2000cwc.googlegroups.com>
Message-ID: <459A8F7A.60405@ctypes.org>

bg_ie at yahoo.com schrieb:
> bg_ie at yahoo.com skrev:
> 
>> Hi,
>>
>> I wish to write a Python wrapper for my C# COM object but am unsure
>> where to start. I have a dll and a tlb file, and I can use this object
>> in C via the following code -
>>
>> // ConsolApp.cpp : Defines the entry point for the console application.
>> //
>> #include "stdafx.h"
>> #include "windows.h"
>> #include "stdio.h"
>> #import "C:\Documents and Settings\X\Mina dokument\Visual Studio
>> 2005\Projects\X_COMObject\X_COMObject\bin\Debug\X_COMObject.tlb"
>> using namespace X_COMObject;
>>
>> int _tmain(int argc, _TCHAR* argv[])
>> {
>> 	CoInitialize(NULL);
>>
>> 	X_COMObject::XCOM_InterfacePtr p(__uuidof(X_COMObject::XCOM_Class));
>> 	XCOM_Interface *X_com_ptr ;
>> 	X_com_ptr = p ;
>> 	X_com_ptr->SetID(10);
>> 	int x = X_com_ptr->GetID();
>> 	printf("%d",x);
>> 	getchar();
>>
>> 	return 0;
>> }
>>
>> Can anyone offer me some tips as to how to do this in Python?
>>
>> Thanks very much for your help,
>>
>> Barry.
> 
> This is what I've done so far, but I know I'm not doing this correctly.
> Can anyone help me out?
> 
> #import pythoncom
> #pythoncom.CoInitialize()

The above is unneeded if you use comtypes as below (and is unneeded
when using pythoncom, as well).

> from comtypes.client import GetModule, CreateObject
> 
> module = GetModule("C:\\Documents and Settings\\X\\Mina
> dokument\\Visual Studio
> 2005\\Projects\\X_COMObject\\X_COMObject\\bin\\Debug\\X_COMObject.tlb")
> 
You don't intantiate the interface, you have to instantiate the COM object.
Something like

  CreateObject("XCOM_Class")

but of course you have to use the correct argument in the call - the progid
of the COM object.
Alternatively you can use the CoClass from the typelibrary, look into the
generated module in the comtypes\gen directory for a class derived from
comtypes.CoClass.

InternetExplorer, for example, can be started in these ways:

# using the progid:
ie = CreateObject("InternetExplorer.Application")

# using the clsid:
ie = CreateObject("{0002DF01-0000-0000-C000-000000000046}")


# using the coclass from the generated module:
mod = GetModule("shdocvw.dll")
ie = CreateObject(mod.InternetExplorer)

Thomas



From nagle at animats.com  Fri Jan 12 02:09:29 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 11 Jan 2007 23:09:29 -0800
Subject: Wierd M2Crypto bug - phony "peer did not return certificate" error
In-Reply-To: <CoFph.33142$Gr2.8155@newssvr21.news.prodigy.net>
References: <YK%oh.17173$sR.6972@newssvr29.news.prodigy.net>
	<ovWdnZTGuYL38jjYnZ2dnUVZ_rqdnZ2d@comcast.com>
	<1168543799.097737.127930@i56g2000hsf.googlegroups.com>
	<ZsednYtgeIfeVTvYnZ2dnUVZ_hydnZ2d@comcast.com>
	<CoFph.33142$Gr2.8155@newssvr21.news.prodigy.net>
Message-ID: <N3Gph.15737$Gw4.6586@newssvr23.news.prodigy.net>

   OK, I have a one-line fix.

To Connection.py of M2Crypto:

def connect(self, addr):
     self.socket.connect(addr)
     self.addr = addr
     self.socket.settimeout(None) # Back to normal timeout (NEW)
     self.setup_ssl()
     self.set_connect_state()
     ret = self.connect_ssl()
     check = getattr(self, 'postConnectionCheck', self.clientPostConnectionCheck)
     if check is not None:
         if not check(self.get_peer_cert(), self.addr[0]):
             raise Checker.SSLVerificationError, 'post connection check failed'
     return ret


    After the socket is connected, we turn its timeout off.

    The effect is that if the caller sets

	socket.setdefaulttimeout(timeoutsecs)

before creating the Connection object, that will set the connection
timeout.  The socket will be created as non-blocking, but before
any reads or writes are done, we clear the timeout, making it blocking
again.  So the connection will time out as requested, but we won't
get errors because the socket is non-blocking and is being used by
code that expects it to block.

Gets usable connection timeouts, and prevents bogus "peer did not
return certificate" errors.

				John Nagle
				Animats



From rmcore at gmail.com  Fri Jan 26 08:23:14 2007
From: rmcore at gmail.com (Michael Bentley)
Date: Fri, 26 Jan 2007 07:23:14 -0600
Subject: Mounting shares with python
In-Reply-To: <1169815227.574577.176610@m58g2000cwm.googlegroups.com>
References: <1169815227.574577.176610@m58g2000cwm.googlegroups.com>
Message-ID: <184B9B55-2101-4BD4-B344-736E18A377D6@gmail.com>


On Jan 26, 2007, at 6:40 AM, Marcpp wrote:

> Hi, when i mount a share with python...
>
> os.system ("mount -t smbfs -o username=nobody ...")
>
> the problem is that I'll to be root.
> Have a comand to send a root password...?
> I've tried
>
> os.system ("su")
> os.system ("the password")
>
> but it doesn't works.

Each call to os.system() spawns a new shell, so that approach  
wouldn't work.  If you have sudo configured such that you don't need  
a password, you can use os.system ("sudo mount -t smbfs -o  
username=nobody ...").  Otherwise (if you must use a password for  
sudo -- or if you don't have sudo), you can use popen2 module <http:// 
docs.python.org/lib/module-popen2.html> to spawn a process you can  
interact with.

-michael



From joel.hedlund at gmail.com  Wed Jan 10 10:01:06 2007
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Wed, 10 Jan 2007 16:01:06 +0100
Subject: Need startup suggestions for writing a MSA viewer GUI in python
Message-ID: <eo2uhr$ffn$1@news.lysator.liu.se>

Hi!

I've been thinking about writing a good multiple sequence alignment 
(MSA) viewer in python. Sort of like ClustalX, only with better zoom and 
pan tools. I've been using python in my work for a couple of years, but 
this is my first shot at making a GUI so I'd very much appreciate some 
ideas from you people to get me going in the right direction. Despite my 
GUI n00b-ness I need to get it good and usable with an intuitive look 
and feel.

What do you think I should do? What packages should I use?

For you non-bioinformatic guys out there, an MSA is basically a big 
matrix (~1000 cols x ~100 rows) of letters, where each row represents a 
biological sequence (gene, protein, etc...). Each sequence has an ID 
that is usually shorter than 40 characters (typically, 8-12). Usually, 
msa visualizers color the letters and their backgrouds according to 
chemical properties.

I want the look and feel to be pretty much like a modern midi sequencer 
(like cubase, nuendo, reason etc...). This means the GUI should have 
least three panes; one to the left to hold the IDs, one in the bottom to 
hold graphs and plots (e.g: user configurable tracks), and the main one 
that holds the actual MSA and occupies most of the space. The left and 
bottom panes should be resizable and foldable.

I would like to be able to zoom and pan x and y axes independently to 
view different portions of the MSA, and the left and bottom panes should 
follow the main pane. I would also like to be able to use drag'n'drop on 
IDs for reordering sequences, and possibly also on the MSA itself to 
shift sequences left and right. Furthermore, I would like to be able to 
select sequences and positions (individually, in ranges or sparsely). I 
would like to have a context sensitive menu on the right mouse button, 
possibly with submenus. Finally, I'd like to be able to export printable 
figures (eps?) of regions and whole MSAs.

I'm thinking all three panes may have to be rendered using some sort of 
scalable graphics because of the coloring and since I'd like to be able 
to zoom freely. I'll also need to draw graphs and plots for the tracks. 
Is pygame good for this, or is there a better way of doing it?

I want my viewer to behave and look like any other program, so I'm 
thinking maybe I should use some standard GUI toolkit instead, say PyQT 
or PyGTK? Would they still allow me to render the MSA nicely?

Does this seem like a humongous project?

Thanks for taking the time!
/Joel Hedlund


From syedamjad_a at yahoo.com  Fri Jan 12 11:28:16 2007
From: syedamjad_a at yahoo.com (CSUIDL PROGRAMMEr)
Date: 12 Jan 2007 08:28:16 -0800
Subject: getting the name of hyperlinks in a file
Message-ID: <1168619296.006209.298990@s34g2000cwa.googlegroups.com>

folks,
I am trying to write a script that would open a download server and
download all the files  and store them in a list

for example Download server is
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/5/SRPMS/


is there any way this can be done in python??



From gagsl-py at yahoo.com.ar  Tue Jan 16 22:22:43 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 17 Jan 2007 00:22:43 -0300
Subject: Anyone has a nice "view_var" procedure ?
In-Reply-To: <8ab5f$45ad5c12$d443bb3a$7243@news.speedlinq.nl>
References: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
	<1168904865.253014.210140@m58g2000cwm.googlegroups.com>
	<8ab5f$45ad5c12$d443bb3a$7243@news.speedlinq.nl>
Message-ID: <7.0.1.0.0.20070117000457.0467fc50@yahoo.com.ar>

At Tuesday 16/1/2007 20:13, Stef Mientki wrote:

>Ok, here's my current solution,
>probably not very Pythonian, (so suggestions are welcome)
>but it works.

It appears that you're a number crunching guy - you absolutely ignore 
all types except numeric ones! :)

>(Too bad I can get the name of the var into a function ;-)

I don't understand this, but if you are saying that you can't get the 
name of the variable you're showing - just pass the name to the 
function: def pm(V, name)

>      # count the occurances of the different types
>      N_int,N_float,N_complex,N_list,N_tuple,N_array,N_unknown =
>0,0,0,0,0,0,0

Ouch, seven counters... your guts should be saying that this is 
candidate for a more structured type... what about a dictionary 
indexed by the element type?

      count = {}

>      for i in range(len(V)):

You're going to iterate along all the items in V, not along its indices...

>        if   type(V[i]) == int:     N_int     += 1
>        elif type(V[i]) == float:   N_float   += 1
>        elif ...

Using a dict:

      for item in V:
         t = type(item)
         try: count[t] = count[t]+1
         except IndexError: count[t] = 1

(That is: if the type is found in the dictionary, increment the 
count; if not, this is the first time: set the count to 1)

>      # print the occurances of the different types
>      # and count the number of types that can easily be displayed
>      if type(V)==list: line = 'list:'
>      else: line = 'tuple:'
>      N = 0
>      if N_int     > 0: line = line + '  N_Int='     + str(N_int)     ; N
>+= 1
>      if N_float   > 0: line = line + '  N_Float='   + str(N_float)   ; N
>+= 1

We'll replace all of this with:

      for key,value in count:
         line += ' %s=%d' % (key, value)

>      if N == 1: line += '  == Homogeneous =='
      if len(count)==1: line += '  == Homogeneous =='

>      print line


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From pwatson at redlinepy.com  Tue Jan  2 17:35:52 2007
From: pwatson at redlinepy.com (Paul Watson)
Date: Tue, 02 Jan 2007 16:35:52 -0600
Subject: A question about unicode() function
In-Reply-To: <1167648187.190860.123680@k21g2000cwa.googlegroups.com>
References: <1167571210.084436.311610@48g2000cwx.googlegroups.com>
	<1167648187.190860.123680@k21g2000cwa.googlegroups.com>
Message-ID: <459ADE48.4000004@redlinepy.com>

JTree wrote:
> Thanks everyone!
> 
> Sorry for my ambiguous question.
> I changed the codes and now it works fine.
> 
> 
> 
> JTree wrote:
>> Hi,all
>>      I encountered a problem when using unicode() function to fetch a
>> webpage, I don't know why this happenned.
>>      My codes and error messages are:
>>
>>
>> Code:
>> #!/usr/bin/python
>> #Filename: test.py
>> #Modified: 2006-12-31
>>
>> import cPickle as p
>> import urllib
>> import htmllib
>> import re
>> import sys
>>
>> def funUrlFetch(url):
>>     lambda url:urllib.urlopen(url).read()
>>
>> objUrl = raw_input('Enter the Url:')
>> content = funUrlFetch(objUrl)
>> content = unicode(content,"gbk")
>> print content
>> content.close()
>>
>>
>> error message:
>>
>> C:\WINDOWS\system32\cmd.exe /c python test.py
>> Enter the Url:http://www.msn.com
>> Traceback (most recent call last):
>>   File "test.py", line 16, in ?
>>     content = unicode(content,"gbk")
>> TypeError: coercing to Unicode: need string or buffer, NoneType found
>> shell returned 1
>> Hit any key to close this window...
>>
>> Any suggestions would be appreciated!
>>
>> Thanks!

So...  How about posting the brief working code?


From harry.g.george at boeing.com  Wed Jan 24 01:24:37 2007
From: harry.g.george at boeing.com (Harry George)
Date: Wed, 24 Jan 2007 06:24:37 GMT
Subject: Python does not play well with others
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
Message-ID: <xqxirex3psq.fsf@cola3.ca.boeing.com>

John Nagle <nagle at animats.com> writes:

>    The major complaint I have about Python is that the packages
> which connect it to other software components all seem to have
> serious problems.  As long as you don't need to talk to anything
> outside the Python world, you're fine.  But once you do, things
> go downhill.  MySQLdb has version and platform compatibility
> problems.  So does M2Crypto.  The built-in SSL support is weak.
> Even basic sockets don't quite work right; the socket module
> encapsulates the timeout mechanism but doesn't get it right.
> 
>    In the Perl, Java, PHP, and C/C++ worlds, the equivalent
> functions just work.   That's because, in those worlds, either the
> development team for the language or the development team
> for the subsystem takes responsibility for making them work.
> Only Python doesn't do that.
> 
>    Python has been around long enough that this should have
> been fixed by now.
> 
> 					John Nagle

You experience isn't shared by everyone.  Some of us find Python the
most functional and portable of the candidates you mention.

Perl - excellent modules and bindings for just about everything you
can think of, but the whole thing is painful to watch.  Once you've
done a few code reviews on 10,000 line perl packages where even the
authors have no idea what the code is doing, you tend to look
elesewhere.

Java - a world of its own.  They reinvent the wheel instead of linking
to existing libraries.  In the process you get libraries upon
libraries upon libraries.  Even if there isn't a performance hit, you
(as a human) can get lost.  And the language is just too verbose to
live with.

PHP - are we talking web scripts or serious programs?  Are you doing
numerical analysis, NLP, computational chemistry, or bit twiddling in
PHP?

C - the portable assembler.  Solid, trusted, tunable performance,
bindings for everything.  Of course memory bugs can stop your project
in its tracks for indeterminant periods.

C++ - objects tacked onto C; but that didn't work so invent a whole
world of templates and rewrite everything again, but now trickier than
C to bind to other languages.  Good work can be done in C++, but that
is a testimony to the programmers and not to the language.

Python - it just works.  Same scripts run on every platform.  Bindings
available to every C/C++/FORTRAN library I've needed so far.  Often
the bindings are not complete, but oddly enough the binding developers
have chosen to do just the functions I need, so who cares.  A clean
architecture for adding more function bindings if I'm so inclined.

-- 
Harry George
PLM Engineering Architecture


From spedrosa at gmail.com  Fri Jan  5 13:55:20 2007
From: spedrosa at gmail.com (Stephen Eilert)
Date: 5 Jan 2007 10:55:20 -0800
Subject: program deployment
In-Reply-To: <1168013279.634426.84110@s80g2000cwa.googlegroups.com>
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
	<12psqtppgi5cme6@corp.supernews.com>
	<1168010377.179056.220500@s80g2000cwa.googlegroups.com>
	<1168012877.398078.59120@s80g2000cwa.googlegroups.com>
	<1168013279.634426.84110@s80g2000cwa.googlegroups.com>
Message-ID: <1168023319.644237.273240@v33g2000cwv.googlegroups.com>


king kikapu wrote:
> Ok, i got the point...Things are a little bit different on the other
> way of the fence (Microsoft way...) and so many of Python's elements
> are a little (at least) strange at first...
>
> But hey, thank you all!

Not really!

Of course you do not distribute .cs (or .vb) files when deploying your
application, but decompilers for .NET are plenty. Same for Java.

For C and the like, it is a little trickier, but the "decompiler" can
and will produce equivalent code. Better yet, just disassemble it.

What is done nowadays to make people's life harder (as in, they cannot
just copy and paste code) is to use an obfuscator. Are there any for
Python?

This is completely and utterly useless for passwords, though. If you
need to protect something, encrypt it. If it is on a server, you can
control access to the file via filesystem permissions.

Do not expect to keep the password secret if you are distributing it,
though :) I've cracked C programs, Clipper and Java almost
effortlessly. They were all custom programs where the sole developer
would put a password for administrative functions, just to be able to
charge money long after it was deployed.


Stephen



From mc at uga.edu  Wed Jan 10 16:39:10 2007
From: mc at uga.edu (mc)
Date: 10 Jan 2007 13:39:10 -0800
Subject: Python - C# interoperability
In-Reply-To: <1168401054.044692.187040@77g2000hsv.googlegroups.com>
References: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>
	<1168401054.044692.187040@77g2000hsv.googlegroups.com>
Message-ID: <1168465150.082226.326660@i56g2000hsf.googlegroups.com>

Thanks to all who responded.  It appears that there may be a solution
as follows:

use jythonc to turn Python program into Java bytecode

use Microsoft's jbimp to turn Java bytecode into .NET DLL

It sounds roundabout, but I am investigating.



From kylotan at gmail.com  Wed Jan  3 12:13:30 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 3 Jan 2007 09:13:30 -0800
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <mailman.2225.1167773658.32031.python-list@python.org>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
	<mailman.2211.1167756187.32031.python-list@python.org>
	<1167757721.883547.70530@42g2000cwt.googlegroups.com>
	<mailman.2225.1167773658.32031.python-list@python.org>
Message-ID: <1167844409.956690.50500@n51g2000cwc.googlegroups.com>

Chris Lambacher wrote:
> On Tue, Jan 02, 2007 at 09:08:41AM -0800, Ben Sizer wrote:
> > Chris Lambacher wrote:
> > > The python part of the 'python setup.py install' idiom needs to be omitted on
> > > Windows, but that does not mean that the solution is to automatically add it
> > > to PATH.
> >
> > Firstly, that solution only works for actual Python scripts; it doesn't
> > solve the utility scripts that are often installed to the /scripts
> > directory. It's a shame that many responses on this thread don't
> > address that half of the issue. Am I the only person who installs
> > packages that add scripts (not all of which are Python ones)?
>
> Nope, but just adding the scripts directory to the PATH does not solve the
> problem.  You also need to either create an executable launcher (.bat  or
> .exe) for the script or mess with environment variables to tell Windows to
> treat .py files a executable.  This issue is solved in Unix by toggling the
> executable bit on the file in the file system.

Many of the scripts that are installed come as batch files or other
executables. They just assume the directory is in your PATH already,
which they aren't, until you set it that way.

> > Secondly, it's still a significant difference from the Unix-based
> > installs.
>
> Its not really.  Unix installs default to being installed to the prefix /usr,
> which just happens to put the executable in your path.  It does not modify the
> user's path in any way.

I was talking more in terms of the end-user experience. I don't know of
any binary package on the distros I've used (Mandriva/Mandrake, Fedora
Core, and Kubuntu) that install Python without it going into your path,
nor of any that allow you to avoid that while using their standard
package managers. It may be incidental in some meaning of the term, but
it's expected and apparently intended.

-- 
Ben Sizer



From google at mrabarnett.plus.com  Wed Jan  3 13:39:16 2007
From: google at mrabarnett.plus.com (MRAB)
Date: 3 Jan 2007 10:39:16 -0800
Subject: list/dictionary as case statement ?
In-Reply-To: <501r8sF1dp76aU1@mid.individual.net>
References: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
	<mailman.2232.1167806595.32031.python-list@python.org>
	<71pmp2tq1klma5urhkfiv8bpq6u8sgtj06@4ax.com>
	<501r8sF1dp76aU1@mid.individual.net>
Message-ID: <1167849556.429532.100990@48g2000cwx.googlegroups.com>


Bjoern Schliessmann wrote:
> Tom Plunket wrote:
>
> > Often (always?) RISC architectures' instruction+operand lengths
> > are fixed to the word size of the machine.  E.g. the MIPS 3000 and
> > 4000 were 32 bits for every instruction, and PC was always a
>                                                ^^
> > multiple of four.
>
> Intels aren't RISC, are they?
>
I think that "PC" referred to the CPU's Program Counter.

The x86 CPUs if typical Windows PCs aren't RISC but Intel also
manufacture X-Scale (ARM core) processors which are.

> But for PowerPC it's the same, every instruction has 32 bit.
>
As are those of ARM processors like X-Scale (although some ARM
processors support the Thumb instruction set).



From gandalf at designaproduct.biz  Tue Jan 23 09:38:47 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Tue, 23 Jan 2007 15:38:47 +0100
Subject: urllib2 question
Message-ID: <45B61DF7.9070808@designaproduct.biz>


  Hi All,

I would like to save a URL into a file. I need to manage cookies and use 
my own HTTP headers so I'm using urllib2 and a custom openerdirector. 
Here is a code fragment:

                        while True:
                            data = openerdirector.read(1024)
                            fd.write(data)
                            if not data:
                                break

The main reason for doing this is that the URL can contain big amounts 
of data, and I do not want to store it in memory. The other way would be:

fd.write(openerdirector.read())

My question is that am I doing this the right way? I used the 
openerdirector as a file here, but I'm not sure if it works like a file. 
A file object should block when read() is called, and then return at 
most 1024 bytes of data when available. It will return with an empty 
string only after EOF reached. But is the same true for the 
openerdirector instance? I did not find useful documentation in the 
python docs about this. The documentation says:

*class OpenerDirector*( 	)

    The OpenerDirector class opens URLs via BaseHandlers chained
    together. It manages the chaining of handlers, and recovery from
    errors. 

But I'm not sure if it can be used as a file or not.

Thanks,

   Laszlo




From steve at REMOVEME.cybersource.com.au  Wed Jan 31 20:30:54 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 01 Feb 2007 12:30:54 +1100
Subject: parent-child object design question
References: <1170136965.015119.225920@q2g2000cwa.googlegroups.com>
	<mailman.3297.1170139632.32031.python-list@python.org>
	<1170220553.843010.258260@a34g2000cwb.googlegroups.com>
	<pan.2007.01.31.07.24.21.793319@REMOVEME.cybersource.com.au>
	<mailman.3341.1170234961.32031.python-list@python.org>
Message-ID: <pan.2007.02.01.01.30.53.805880@REMOVEME.cybersource.com.au>

On Wed, 31 Jan 2007 20:15:44 +1100, Ben Finney wrote:

> "Steven D'Aprano" <steve at REMOVEME.cybersource.com.au> writes:
> 
>> >         def _accumulate_properties(self, properties):
>> >             self.properties = []
>>
>> Probably better to put that in the __init__ method, otherwise if
>> somebody runs instance._accumulate_properties(...) again, it will
>> have the side-effect of throwing away whatever was already in
>> instance.properties.
> 
> That's the point of naming it with a leading underscore. You've
> already explained that this is convention for "Private, don't use".

"Somebody" could easily be the class designer. This is a method that, as
written, will break the instance if it is run twice. That's not good.

 
>> Some people might argue that if someone runs a private method like
>> _accumulate_properties, they deserve whatever bad things happen to
>> them.  But I say, well, sure, but why *design* your method to break
>> things when called twice?
> 
> Exactly the same could be said for calling the __init__ method twice.

__init__ isn't a "private" method, it is a public method. A very special
public method, designed to initialise the instance, that is to set the
instance to a brand new pristine state.

Calling instance.__init__ *should* initialise the instance and throw away
whatever data was already there. (Why you would want to do this is another
question.) What else would you expect it to do? If you called __init__ and
it *didn't* initialise the instance, that would surely be a bug.

But _accumulate_properties as written is sort of half-man-half-duck sort
of thing: it would be useful for accumulating properties to the instance,
except that when you do so it throws away whatever properties you have
previously accumulated. Or rather, it doesn't even do that -- it simply
throws away the list of properties, but leaves the actual properties
behind. That can't possibly be good design! An inconsistent internal
state like that is a bug waiting to happen.


>> Who knows, maybe you'll decide you want to call it twice yourself.
> 
> Right. In which case, it's good that it's already in a separate,
> clearly-named, single-purpose method.

It isn't either clearly-named or single-purpose.

The name is misleading, for two reasons. First, "properties" has a
technical meaning in Python, and this method doesn't have anything to do
with that meaning. Secondly, even if it did, it doesn't accumulate them,
it resets the list to a new state, throwing away whatever was there before. 

Nor is it single-purpose: while it *sets* a list of attribute names to a
new list of values, it *adds* those new attributes to the instance __dict__.

There are some methods that, in principle, should be run once and once
only. There's nothing inherently about accumulating attributes/properties
to an instance can only be done once. But the way the method is written,
it will break things if you try to accumulate attributes twice -- not
because of any inherent badness in doing so, but because the method breaks
the consistency between self.properties (a list) and the actual attributes
accumulated.

> Make the code easy to understand, not idiot-proof.

I'm not arguing that the entire method should be moved into __init__.
*Initialising* self.properties list to [] is not logically part of
*accumulating* properties, and should be moved out of that method. That
tiny change will fix all of the problems I describe except for the
misleading name.



-- 
Steven D'Aprano 



From ziga.seilnacht at gmail.com  Mon Jan  8 12:36:38 2007
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 8 Jan 2007 09:36:38 -0800
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk><entj5d$o4$1@south.jnrs.ja.net>
	<entkru$2vs$1@gemini.csx.cam.ac.uk>
	<50f5snF1fb5uqU2@mid.individual.net>
	<entpo0$d0g$1@gemini.csx.cam.ac.uk>
	<mailman.2425.1168272626.32031.python-list@python.org>
	<enttq6$lj2$1@gemini.csx.cam.ac.uk>
Message-ID: <1168277798.302236.184180@s34g2000cwa.googlegroups.com>

Nick Maclaren wrote:

> I think that you should.  Where does it say that tuple's __str__ is
> the same as its __repr__?
>
> The obvious interpretation of the documentation is that a sequence
> type's __str__ would call __str__ on each sub-object, and its __repr__
> would call __repr__.

How would you distinguish ['3', '2', '1'] from [3, 2, 1] in that case?

Ziga



From http  Thu Jan 25 18:01:27 2007
From: http (Paul Rubin)
Date: 25 Jan 2007 15:01:27 -0800
Subject: stop script w/o exiting interpreter
References: <Lyauh.8689$QE6.2176@trnddc02>
Message-ID: <7x7ivaiud4.fsf@ruckus.brouhaha.com>

"Alan Isaac" <aisaac at american.edu> writes:
> I'm fairly new to Python and I've lately been running a script at
> the interpreter while working on it.  Sometimes I only want to
> run the first quarter or half etc.  What is the "good" way to do this?

If it's single threaded then just call sys.exit().  If you don't know
what single threaded means, your program is definitely single threaded.


From gagsl-py at yahoo.com.ar  Wed Jan 24 00:23:41 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 24 Jan 2007 02:23:41 -0300
Subject: Overloading assignment operator
References: <2BBAEE949D384D40A2B851287ADB6A4304595AA4@eugsrv400.psc.pscnet.com>
Message-ID: <ep6qgl$2gn$1@sea.gmane.org>

"Carroll, Barry" <Barry.Carroll at psc.com> escribi? en el mensaje 
news:2BBAEE949D384D40A2B851287ADB6A4304595AA4 at eugsrv400.psc.pscnet.com...

> * ... the assignment operator is used to assign an
> * object to a name in the current namespace... IOW, you cannot "overload
> * the assignment operator."
> (wesley chun)
This is the key concept, if you want to be able to "see" assignments, you 
should work with a namespace (a dictionary is enough...)

> * result = property(get_result, set_ result, doc='result of operations')
>
> I have tested this using the admittedly simple-minded code snipped
> below.
>
>>>>>>>>>>>
> @BCARROLL[Python]|3> class Aclass:
>                 |.>     def __init__(self):
>                 |.>         __result = None
>                 |.>     def get_result(self):
>                 |.>         return self.__result
>                 |.>     def set_result (self, result):
>                 |.>         self.__result = result
>                 |.>     result = property(get_result, set_result,
> doc='result of expression')
>                 |.>
> @BCARROLL[Python]|5> A = Aclass()
> @BCARROLL[Python]|7> a.result = 2*3
> @BCARROLL[Python]|8> a.result
>                 <8> 6
> @BCARROLL[Python]|9> a.result = 25.0 * 5.25
> @BCARROLL[Python]|10> a.result
>                 <10> 131.25
> @BCARROLL[Python]|11>
>>>>>>>>>>>

Notice that you can delete ALL those lines of code, leaving a bare:

class Aclass: passs

and you will get EXACTLY the same results. In this case -and this are not my 
words- properties are a waste of programmer time, processor time and disk 
space.
Of course properties are very useful, but when you need to do something 
"more" than just storing and retrieving a single value.

-- 
Gabriel Genellina 




From no-spam at no-spam-no-spam.invalid  Thu Jan  4 15:09:20 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 04 Jan 2007 21:09:20 +0100
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167735173.884444.250750@k21g2000cwa.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
	<enavfb$1gn$1@news.albasani.net>
	<1167735173.884444.250750@k21g2000cwa.googlegroups.com>
Message-ID: <enjmth$ru3$1@news.albasani.net>

Ben Sizer wrote:
> robert wrote:
>> Ben Sizer wrote:
>>> My opinion is that this is not as big a problem as some may feel that
>>> it is. Unlike Unix systems, the PATH variable is rarely used.
>> It is a big problem.
>>
>> It is not less than the majority of Python users (at least those who do things on the command line) who deal with multiple Python versions.
> 
> So you think most Python users have more than one version of Python
> installed? I disagree - but even if it is true, how come this isn't a
> big problem on Unix? Can you name a single distribution that doesn't
> install Python to the path?

As said - yes they install the 'pythonx.y' binary or just 'python' default link _into_ the path (/usr/local/bin or /usr/bin). Yet they don't manipulate any PATH.


>> This would create funny PATH variables - almost a "psychic behavior with history".
> 
> It is quite trivial to see if Python is already on the path, and act
> differently based on that.

When you run an installer you first lookup the PATH and according to your look you hit or not-hit the (future) checkbox in the installer and/or edit the PATH later to only have one python main folder in it?  
You could as well edit the PATH at all yourself as one can do it now.

>> Windows is at all less a multi user system. I don't even know a case where two (Python) Programmers use _one_ box and then also want separate Python's - just know home mates (parasites) who occasionally share the web browser or so...
> 
> So... that's another reason why there's rarely a problem in setting
> that PATH variable.

mix-up with PATH is already there for a single user. I named a most negative example (Borland) and would not use such checkbox in a Python installer which would allow to manipulate the PATH in hardly  predictable manner.

>> Linking also a default python.exe into the system32 upon a (non-default) checkbox mark in the installer should be simple, clear and do everything what 99.9% want - and most "compatible" to *nix.
> 
> No, it doesn't : the /scripts directory is also important for many
> Python packages and that isn't addressed by shifting python.exe into
> system32.

Now you want also the scripts directory on the PATH? I don't even see this stuff on linux py's nor PATH's.

But as somebody said, we could have 3 or 4 options in the installer. Just who will supply MvL with the patch, which is truely not trivial.

Most cheap and consistent is:

Create pythonXY.exe always next to the pythonXY.dll auto. This is the same as having usr/local/pythonX.Y on linux. (Personally I anyway like to call exactly the python i want.)

Then a future option 2 - as I'd favor it next to the current "do nothing" - would probably also most simple for system installations:

If checkbox "copy python.exe into System Folder" then copy/overwrite python.exe into System Folder. There is not much magic and not much precedence worries about it and every developer knows clearly what happens. If multi-pythons, one knows that this would create the new default "python" on the command line unless one has custom things in front on the PATH. 

Then there could be advanced options 3, 4, .. for PATHs: With questions: Replacing in User- and/or System-PATH?, prepending-to-User/System-PATH?, appending-to-User/System-PATH, the same for the Script-folders and all fancy things and side-effects etc.  - if consistent patches will ever be supplied ...
I'd not use these options a lot anyway because I like Python to answer my questions - not reverse :-)


Robert


From eastera at gmail.com  Mon Jan  1 02:07:08 2007
From: eastera at gmail.com (JTree)
Date: 31 Dec 2006 23:07:08 -0800
Subject: A question about unicode() function
In-Reply-To: <mailman.2173.1167571846.32031.python-list@python.org>
References: <1167571210.084436.311610@48g2000cwx.googlegroups.com>
	<mailman.2173.1167571846.32031.python-list@python.org>
Message-ID: <1167635228.725060.39110@42g2000cwt.googlegroups.com>

Hi,

I changed my codes to:

#!/usr/bin/python
#Filename: test.py
#Modified: 2007-01-01

import cPickle as p
import urllib
import htmllib
import re
import sys

funUrlFetch =  lambda url:urllib.urlopen(url).read()

objUrl = raw_input('Enter the Url:')
content = funUrlFetch(objUrl)
content = content.encode('gb2312','ignore')
print content
content.close()

I used "ignore" to deal with the data lose, but it still caused a
error:

C:\WINDOWS\system32\cmd.exe /c python tianya.py
Enter the Url:http://www.tianya.cn
Traceback (most recent call last):
  File "tianya.py", line 17, in ?
    content = content.encode('gb2312','ignore')
UnicodeDecodeError: 'ascii' codec can't decode byte 0xbb in position
88: ordinal not in range(128)
shell returned 1
Hit any key to close this window...

My python version is 2.4, Does it have some problems with asian
encoding support?

Thanks!


On Dec 31 2006, 9:30 pm, "Felipe Almeida Lessa"
<felipe.le... at gmail.com> wrote:
> On 31 Dec 2006 05:20:10 -0800, JTree <east... at gmail.com> wrote:
>
> > def funUrlFetch(url):
> >     lambda url:urllib.urlopen(url).read()This function only creates a lambda function (that is not used or
> assigned anywhere), nothing more, nothing less. Thus, it returns None
> (sort of "void") no matter what is its argument. Probably you meant
> something like
>
> def funUrlFetch(url):
>     return urllib.urlopen(url).read()
>
> or
>
> funUrlFetch = lambda url:urllib.urlopen(url).read()
>
> > objUrl = raw_input('Enter the Url:')
> > content = funUrlFetch(objUrl)content gets assigned None. Try putting "print content" before the unicode line.
>
> > content = unicode(content,"gbk")This, equivalent to unicode(None, "gbk"), leads to
>
> > TypeError: coercing to Unicode: need string or buffer, NoneType foundNone's are not strings nor buffers, so unicode() complains.
> 
> See ya,
> 
> --
> Felipe.



From nogradi at gmail.com  Wed Jan 31 11:02:39 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Wed, 31 Jan 2007 17:02:39 +0100
Subject: subway
Message-ID: <5f56302b0701310802y7e45c98fmaaebe090e34d410@mail.gmail.com>

Does anyone know what has happened to the codebase of the subway
project? It seems the whole project has been shut down leaving no
trace of the code on net but I would be very happy to see it,
apparently it had some cool features that would be fun to look at.
Does anyone have access to the code and/or is willing to make it
publically available?


From sean at datafly.net  Wed Jan 17 20:35:30 2007
From: sean at datafly.net (Sean Schertell)
Date: Thu, 18 Jan 2007 10:35:30 +0900
Subject: PyMeld for html templates?
Message-ID: <8793EED7-D320-417B-8C8B-7BBB7572C025@datafly.net>

I'm trying to decide which template system to get married to. I think  
I've narrowed it down to PyMeld, Cheetah, or Jinja  but leaning  
heavily toward PyMeld because I love the idea that your templates are  
*totally* clean and that get manipulated from behind the scenes. This  
seems to be elegantly inline with the Sacred Creed of separation of  
logic from presentation.

Of course I'm going to try them all but I wonder if anyone has any  
thoughts on PyMeld as a template system for churning out general  
websites?

One important consideration is that even though PyMeld itself doesn't  
support template inheritance so far as I know, I'll need to  
accomplish that somehow. I want for a URI request to mysite.com/info  
to pull in a layout.html template which will in turn be populated by  
the info.html template. I've already got the URI mapping stuff  
sorted. But how about PyMeld, any ideas on how to do it or whether it  
will even work as I've described?

Thanks!

Sean


::::  DataFly.Net  ::::
Complete Web Services
http://www.datafly.net



From john.pye at gmail.com  Wed Jan 24 04:05:20 2007
From: john.pye at gmail.com (John Pye)
Date: 24 Jan 2007 01:05:20 -0800
Subject: Overloading assignment operator
In-Reply-To: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <1169629520.195576.214460@q2g2000cwa.googlegroups.com>

Hi thre,

On Jan 24, 5:24 am, Achim Domma <d... at procoders.net> wrote:
> I want to use Python to script some formulas in my application.

Depending on what you're trying to do, you might possibly find it
useful to lake a look at the approach used by PyGINAC, which is a
symbolic algebra system (in C++) wrapped with some clever python
bindings:

http://pyginac.sourceforge.net/

Hope that helps,
JP



From martin at v.loewis.de  Wed Jan  3 14:12:16 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 03 Jan 2007 20:12:16 +0100
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167844551.332740.320760@s34g2000cwa.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
	<mailman.2211.1167756187.32031.python-list@python.org>
	<1167757721.883547.70530@42g2000cwt.googlegroups.com>
	<459BCE85.5070707@v.loewis.de>
	<1167844551.332740.320760@s34g2000cwa.googlegroups.com>
Message-ID: <459C0010.60801@v.loewis.de>

Ben Sizer schrieb:
>> Those packages should install .bat files into /scripts on Windows.
> 
> Which still need their location to be be fully qualified, due to
> /scripts not being in the path. This is not my experience with Linux
> installations of the same packages.

Ah, so you not only want the directory that contains Python added to
the path, but also /scripts. That's again a new requirement, and I
think it is the first time that somebody requests it.

Regards,
Martin


From bborcic at gmail.com  Thu Jan 25 05:55:54 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Thu, 25 Jan 2007 11:55:54 +0100
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <4866bea60701240736v837d246w187ecb1ccb90eefd@mail.gmail.com>
References: <45b6231b$1_2@news.bluewin.ch>	<4866bea60701230724y3a51bc31p9970075f99b70d05@mail.gmail.com>	<ep7qoe$jdg$1@sea.gmane.org>
	<4866bea60701240736v837d246w187ecb1ccb90eefd@mail.gmail.com>
Message-ID: <epa2dh$jl3$1@sea.gmane.org>

Chris Mellon wrote:
> On 1/24/07, Boris Borcic <bborcic at gmail.com> wrote:
>> Chris Mellon wrote:
>>> Using either win32 or wxPython you will be able to produce bitmaps
>>> directly, without needing to create a visible window.
>>>
>>>
>>> Some quick & dirty wxPython code
>>>
>>> def getTextBitmap(text, font, fgcolor, bgcolor):
>>>     dc = wx.MemoryDC()
>>>     dc.SetFont(font)
>>>     width, height= dc.GetTextExtent(text)
>>>     bmp = wx.EmptyBitmap(width, height)
>>>     dc.SelectObject(bmp)
>>>     dc.SetBackground(wx.Brush(bgcolor))
>>>     dc.Clear()
>>>     dc.SetTextBackground(bgcolor)
>>>     dc.SetTextForeground(fgcolor)
>>>     dc.DrawText(text, 0, 0)
>>>     dc.SelectObject(wx.NullBitmap)
>>>     return bmp
>>>
>>>
>>> Raw win32 code will look similar but will be much more verbose.
>> Thx again for this base.
>>
>> Quickly testing this, it appears that the result is rendered half a pixel off in
>> the x-direction. Does this make sense ? Is it possible to position text with
>> subpixel accuracy ?
>>
> 
> The GDI text api, which is what wx is wrapping here, only provides
> pixel accuracy. You are probably seeing a kerning effect from your
> chosen font and perhaps the effects of ClearType.

I am not. Turning antialiasing off (as a desktop setting) changes the rendering 
but wx._gdi_ still insists that horizontal coordinates are between pixels (to 
the contrary of vertical coordinates). This means thin black vertical lines are 
rendered by two pixel columns, the left one red, the right one cyan. 
Non-aliased, 90-degree rotated text is still smeared likewise left-to-right on 
the screen what becomes top-to-bottom relative to the text. Setting the scales 
at 0.5 and drawing the text one pixel off (to express a half-pixel shift) 
doesn't work. A long almost vertical thin black line that's one pixel off 
top-to-bottom results in two parallel vertical uniformly colored red and cyan 
pixel columns, broken in the middle.

In short, wx._gdi_ fights quite hard to enforce what I am trying to avoid :( I 
might admire its consistency if it extended to treating both axes similarly...

Regards, Boris Borcic



From ptmcg at austin.rr._bogus_.com  Sun Jan  7 06:34:57 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 7 Jan 2007 05:34:57 -0600
Subject: How to write code to get focuse the application which is open
	from server
References: <1168143871.536432.252010@v33g2000cwv.googlegroups.com>
Message-ID: <45a0dae2$0$8948$4c368faf@roadrunner.com>

"vinthan" <svithi at gmail.com> wrote in message 
news:1168143871.536432.252010 at v33g2000cwv.googlegroups.com...
> hi,
> I am new to python. I have to write test cases in python. An
> application is open in the desk top ( application writen in .Net) I
> have to write code to get focuse the application and click on the link
> which in the one side  and it will load the map on the other and I have
> to check map is loaded. Any one tell me how do I use Dispatch or any
> other method to write a code.
>
If you are running on Windows, look into pywinauto 
(http://www.openqa.org/pywinauto/).

I have successfully used it to interact with a Flash animation running 
within an IE browser.

I also had to inspect the graphics displayed by the Flash animation, for 
this I used PIL (http://www.pythonware.com/products/pil/).

Good luck,
-- Paul 




From michael at mustun.ch  Mon Jan  8 08:43:01 2007
From: michael at mustun.ch (Michael M.)
Date: Mon, 08 Jan 2007 14:43:01 +0100
Subject: where is python on linux?
In-Reply-To: <mailman.2410.1168255722.32031.python-list@python.org>
References: <1168160755.253030.132260@i15g2000cwa.googlegroups.com><45a157a0$0$289$426a74cc@news.free.fr>	<Xns98B1B092FD1ADrzantowgmailcom@208.49.80.253>
	<mailman.2410.1168255722.32031.python-list@python.org>
Message-ID: <iTroh.101$FA3.57@nntpserver.swip.net>


$ whoami
cannibal

;-)


Hendrik van Rooyen wrote:

> "rzed" <rzantow at gmail.com> wrote:
> 
> 
> 
>>mmmmmmm... sloppy joes ....
>>
>>-- 
>>rzed
>>
>>"A sandwich is a sandwich, but a Manwich is a meal."
> 
> 
> You eat people?
> 
> - Hendrik
> 
> 


From gagsl-py at yahoo.com.ar  Wed Jan 31 03:08:36 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 31 Jan 2007 05:08:36 -0300
Subject: Unicode error handler
References: <epdmae$qps$1@sea.gmane.org>
	<mailman.3314.1170174675.32031.python-list@python.org>
	<1170217309.125918.214060@v33g2000cwv.googlegroups.com>
Message-ID: <op.tm0d8mdosd1mbx@gabriel2.softlabbsas.com.ar>

En Wed, 31 Jan 2007 01:21:49 -0300, Hieu.D.Hoang at gmail.com  
<Hieu.D.Hoang at gmail.com> escribi?:

> I don't understand what %r and r are and where they are from. The man
> 3 printf page doesn't have %r formatting.

Perhaps you should look into the Python docs instead?

-- 
Gabriel Genellina



From redefined.horizons at gmail.com  Fri Jan  5 23:34:57 2007
From: redefined.horizons at gmail.com (redefined.horizons at gmail.com)
Date: 5 Jan 2007 20:34:57 -0800
Subject: Pausing for Python Interpreter error messages...
Message-ID: <1168058097.855006.229820@s80g2000cwa.googlegroups.com>

I've written a few classes that I have been testing in IDLE. However,
every time I make a change to the classes based on the testing I have
to walk through all he steps of preparing the classes for testing
again.

So I wrote a script that does all the set-up work for me. The only
problem is when I run this script using the Python interpreter I can't
get the command prompt to stay up long enough for me to read the
message.

How do I get the command prompt to stay up? Is there a way to run my
script and view the error message in IDLE?

Thanks for the help.

Scott Huey

P.S. - I'm using Windows XP with the latest Python 2.3.



From bearophileHUGS at lycos.com  Mon Jan  8 13:23:36 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 8 Jan 2007 10:23:36 -0800
Subject: recursive function
In-Reply-To: <1168265240.294223.298750@s80g2000cwa.googlegroups.com>
References: <1168265240.294223.298750@s80g2000cwa.googlegroups.com>
Message-ID: <1168280616.813713.317370@v33g2000cwv.googlegroups.com>

First possible solution:

def rloop(seqin, comb):
    # xcross product recipe 302478 by David Klaffenbach
    if seqin:
        for item in seqin[0]:
            newcomb = comb + [item]
            for item in rloop(seqin[1:], newcomb):
                yield item
    else:
        yield comb

data = {1: [(3, 4), (5, 8)],
        2: [(5, 4), (21, 3), (19, 2)],
        3: [(16, 1), (0, 2), (1, 2), (3, 4)]}

print [sol for sol in rloop(data.values(), []) if 24==sum(el[0] for el
in sol)]

Bye,
bearophile



From eric_brunel at despammed.com  Mon Jan 29 03:33:11 2007
From: eric_brunel at despammed.com (Eric Brunel)
Date: Mon, 29 Jan 2007 09:33:11 +0100
Subject: Resizing widgets in text windows
References: <1169847315.631951.295830@a75g2000cwd.googlegroups.com>
Message-ID: <op.tmwp1letrqur0o@eb.pragmadev>

On Fri, 26 Jan 2007 22:35:20 +0100, <deacon.sweeney at gmail.com> wrote:

> Hi, I've been searching for a .resize()-like function to overload much
> like can be done for the delete window protocol as follows:
>
> toplevel.protocol("WM_DELETE_WINDOW", callback)
>
> I realize that the pack manager usually handles all of the resize
> stuff, but I've found an arrangement that the pack manager fails for.
> That is, if one embeds a canvas into a window created inside a text
> widget, then resize the text widget (via its container), the canvas and
> its container windows do not resize.

Supposing you call "embedding" inserting a widget in the text via the  
window_create method, why should they? Embedding a window in a Text is  
used to put some arbitrary widget in the middle of the text it contains.  
So the embedded widget has no reason to grow or shrink with the parent  
Text widget: it just moves with the text.

> So I need to resize the window
> that the canvas is embedded in. The most obvious way of doing this
> would be as above, but there does not seem to be an equivalent to the
> "WM_DELETE_WINDOW" protocol for resizing.

As James said, the <Configure> event is your friend. But I'm not sure I  
understand your use case...

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From zebra05 at gmail.com  Wed Jan 17 10:34:31 2007
From: zebra05 at gmail.com (Shortash)
Date: 17 Jan 2007 07:34:31 -0800
Subject: Python Web Frameworks
Message-ID: <1169048071.353887.279160@q2g2000cwa.googlegroups.com>

Hi Gurus,

I want to build a Python web app but im not sure which one to go for. I
prefer something like asp.Net , which would allow me to fully seperate
the presentation layer from the logic. Please advise?

thanks,

"Shortash'



From aahz at pythoncraft.com  Fri Jan 19 18:29:18 2007
From: aahz at pythoncraft.com (Aahz)
Date: 19 Jan 2007 15:29:18 -0800
Subject: OT Annoying Habits (Was: when format strings attack)
References: <mailman.2917.1169243036.32031.python-list@python.org>
Message-ID: <eork8e$kv5$1@panix3.panix.com>

In article <mailman.2917.1169243036.32031.python-list at python.org>,
Carroll, Barry <Barry.Carroll at psc.com> wrote:
>
>Secondly, can someone point me to the Standard Usenet Convention that
>mandates against top-posting.  This is not sarcasm; I would really like
>to see it.  You see, I recently returned to Usenet after a LONG absence.
>When I was last a regular Usenet citizen the Internet was new, GUI
>interfaces were experimental and the World Wide Web didn't exist yet.
>Newsreader software was text-based.  Top-posting was the common
>practice, because it was the most convenient: you didn't have to page
>through an arbitrarily large number of messages, most of which you'd
>already read umpteen times, to get to the new stuff you were interested
>in. =20

Funny, I've been on Usenet for more than fifteen years, continuously
(and long-windedly -- but that's another matter) and I've never seen a
Usenet group where top-posting was standard.  Anyway, here's a good
resource:

http://www.xs4all.nl/%7ewijnands/nnq/nquote.html
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From gandalf at designaproduct.biz  Mon Jan 22 15:20:46 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Mon, 22 Jan 2007 21:20:46 +0100
Subject: mmap caching
In-Reply-To: <1169496803.518305.275750@s34g2000cwa.googlegroups.com>
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>	<slrner7h27.d8g.nick@irishsea.home.craig-wood.com>	<1169415139.515834.233700@a75g2000cwd.googlegroups.com>	<4X7th.13145$pQ3.5671@newsread4.news.pas.earthlink.net>
	<1169496803.518305.275750@s34g2000cwa.googlegroups.com>
Message-ID: <45B51C9E.5050505@designaproduct.biz>


> It's around 400MB. As I said, I cannot reproduce the MemoryError
> locally since I have 1GB physical space but IIRC the user who reported
> it had less. Actually I am less concerned about whether a MemoryError
> is raised or not in this case and more about the fact that even if
> there's no exception, the program may suffer from severe thrashing due
> to constant swapping. That's an issue with the specific
> program/algorithm rather with Python or the OS.
>   
Well, if the same program runs when you have 1GB physical memory then 
probably the problem is not that you ran out of virtual address space. 
It would help to provide the related code from your program.

  Laszlo



From fdu.xiaojf at gmail.com  Mon Jan  8 10:23:58 2007
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Mon, 08 Jan 2007 23:23:58 +0800
Subject: Maybe a little bug of ipython 0.7.3 ?
Message-ID: <45A2620E.70103@gmail.com>

I'm new to ipython, and i found it a very cool product.

$ ipython
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)]
Type "copyright", "credits" or "license" for more information.

IPython 0.7.3 -- An enhanced Interactive Python.
<snip>

In [8]: a = range(1000)

In [9]: a?
Type:           list
Base Class:     <type 'list'>
String Form:    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 <...> 0, 981, 98
2, 983, 984, 985, 986, 987, 988, 989, 990, 991, 992, 993, 994, 995, 996, 
997, 998, 999]
Namespace:      Interactive
Length:         1000
Docstring:
    list() -> new list
list(sequence) -> new list initialized from sequence's items

*Please note that there is an extra "0" after "**26 <...>", which 
doesn't appear for the followling cases:*

In [10]: b = range(100)

In [11]: b?
Type:           list
Base Class:     <type 'list'>
String Form:    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 <...> , 76, 77,
78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 
96, 97, 98, 99]
<snip>

In [12]: c = range(10000)

In [13]: c?
Type:           list
Base Class:     <type 'list'>
String Form:    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 <...> , 9984, 99
85, 9986, 9987, 9988, 9989, 9990, 9991, 9992, 9993, 9994, 9995, 9996, 
9997, 9998, 9999]
<snip>




From horpner at yahoo.com  Thu Jan 18 14:40:28 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 18 Jan 2007 19:40:28 GMT
Subject: How can I create a linked list in Python?
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<eojb9v$92rq$1@netnews.upenn.edu>
	<45ad5104$0$393$426a74cc@news.free.fr>
	<1169009882.408482.43360@q2g2000cwa.googlegroups.com>
	<45ae8950$0$31033$426a74cc@news.free.fr>
	<1169074382.702857.313010@11g2000cwr.googlegroups.com>
	<7xps9dl04y.fsf@ruckus.brouhaha.com>
	<1169147440.211108.137940@s34g2000cwa.googlegroups.com>
Message-ID: <slrneqvmjf.fg.horpner@FIAD06.norwich.edu>

On 2007-01-18, sturlamolden <sturlamolden at yahoo.no> wrote:
>
> Paul Rubin wrote:
>
>> But that's what Lisp does too.
>
> Ok, I may have to reread Paul Graham's book on ANSI Common Lisp
> then.

Here's something silly I whipped up to play with.

r""" Lisp style singly-linked lists called llist. 

"""

def consp(o):
    return isinstance(o, Cons)

def car(c):
    """ Return the car of a lisp-list. Undefined for nil. """
    if null(c):
        raise AttributeError("nil has no cdr")
    return c.car

def cdr(c):
    """ Return the cdr of a lisp=list. """
    if null(c):
        return nil
    return c.cdr

def cons(o, c):
    """ Build a new cons cell from an object and a Cons. """
    return Cons(o, c)

def null(c):
    return c is nil

def rplaca(c, o):
    c.car = o
    return c

def rplacd(c, o):
    c.cdr = o
    return c

def llist(li):
    """ Build a llist from a list. """
    c = nil
    for a in reversed(li):
        if isinstance(a, list):
            c = cons(llist(a), c)
        else:
            c = cons(a, c)
    return c

class Cons(object):
    def __init__(self, car, cdr):
        self.car = car
        self.cdr = cdr
    def __repr__(self):
        def helper(li, s):
            if null(li):
                return s + ")"
            else:
                return helper(cdr(li), s + " %s" % repr(car(li)))
        return helper(self.cdr, "(" + repr(self.car))

class Nil(Cons):
    def __init__(self):
        Cons.__init__(self, None, None)
    def __repr__(self):
        return '()'

nil = Nil()

print cons(5, nil)
print cons(5, cons(3, nil))
print cons(cons(5, (cons(7, nil))), cons(cons(5, cons(3, nil)), nil))
print nil
print llist([1, ['a', 'b', 'c'], 2, 3])

There's lots more more stuff to add, but the fun wore out. I'd
like if it the cdr of nil could actually be nil, instead of None
with a special case in cdr, but I couldn't figure out a neat way
to do it.

-- 
Neil Cerutti
I've had a wonderful evening, but this wasn't it. --Groucho Marx

-- 
Posted via a free Usenet account from http://www.teranews.com



From martin at v.loewis.de  Sun Jan 21 13:55:24 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 21 Jan 2007 19:55:24 +0100
Subject: A solution to the MSVCRT vs MSVCR71 problem?
In-Reply-To: <1169404921.709667.192280@38g2000cwa.googlegroups.com>
References: <1169348867.369917.104970@m58g2000cwm.googlegroups.com>
	<mailman.2958.1169368253.32031.python-list@python.org>
	<1169404921.709667.192280@38g2000cwa.googlegroups.com>
Message-ID: <45B3B71C.7090709@v.loewis.de>

sturlamolden schrieb:
>> This would only work, if runtime dll's were compatibles between them,
>> and they are not. 
> 
> It is standard C, defined by ANSI and ISO.

ANSI and ISO don't define the ABI, though. For example, the definition
of the FILE type might (and does) vary across compilers, even if all
these compilers implement C99.

Regards,
Martin


From nmm1 at cus.cam.ac.uk  Thu Jan 25 04:26:40 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 25 Jan 2007 09:26:40 GMT
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
Message-ID: <ep9t4g$uf$1@gemini.csx.cam.ac.uk>


In article <1169675599.502726.5070 at a34g2000cwb.googlegroups.com>,
"Paddy" <paddy3118 at netscape.net> writes:
|> 
|> Three to four months before `strange errors`? I'd spend some time
|> correlating logs; not just for your program, but for everything running
|> on the server. Then I'd expect to cut my losses and arrange to safely
|> re-start the program every TWO months.
|> (I'd arrange the re-start after collecting logs but before their
|> analysis. Life is too short).

Forget it.  That strategy is fine in general, but is a waste of time
where threading issues are involved (or signal handling, or some types
of communication problem, for that matter).  There are three unrelated
killer facts that interact:

    Such failures are usually probabilistic ("Poisson process"), and
so have no "history".

    The expected number is usually proportional to the square of the
activity, sometimes a higher power.

    Virtually nothing involved does any routine logging, or even has
options to log relevant events.

The first means that the strategy of restarting doesn't help.  All
three mean that current logs are almost never any use.


Regards,
Nick Maclaren.


From rw at smsnet.pl  Sun Jan 28 12:18:39 2007
From: rw at smsnet.pl (Rob Wolfe)
Date: Sun, 28 Jan 2007 18:18:39 +0100
Subject: howto redirect and extend help content ?
References: <1fc1a$45bcc7f4$d443bb3a$8806@news.speedlinq.nl>
Message-ID: <87d54z9ij4.fsf@smsnet.pl>

Stef Mientki <S.Mientki-nospam at mailbox.kun.nl> writes:

> I'm making special versions of existing functions,
> and now I want the help-text of the newly created function to exists of
> 1. an extra line from my new function
> 2. all the help text from the old function
>
> # the old function
> def triang(M,sym=1):
>      """The M-point triangular window.    <== old help text
>      """
>      ....
>
> # the new function
> def chunked_triang(M):
>      """ Chunked version of "triang"      <== the extra line
>      """
>
>  >>> help(chunked_triang)
> # should give something like
>
> chunked_triang(M)                        <== the new definition
>      Chunked version of "triang"          <== the extra line
>      The M-point triangular window.       <== old help text
>
> Is that possible ?

You can take advantage of the decorator syntax:

>>> def triang(M,sym=1):
...     """The M-point triangular window.
...     """
...     return "triang"
... 
>>> help(triang)
Help on function triang in module __main__:

triang(M, sym=1)
    The M-point triangular window.

>>> def add_doc(f):
...     def wrap(g):
...             g.__doc__="chunked version of %s\n%s" % (f.__name__,f.__doc__)
...             return g
...     return wrap
... 
>>> @add_doc(triang)
... def chunked_triang(M):
...     return "chunked triang"
... 
>>> help(chunked_triang)
Help on function chunked_triang in module __main__:

chunked_triang(M)
    chunked version of triang
    The M-point triangular window.

-- 
HTH,
Rob


From no-spam at no-spam-no-spam.invalid  Thu Jan 18 04:00:02 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 18 Jan 2007 10:00:02 +0100
Subject: predefined empty base class ??
In-Reply-To: <mailman.2853.1169070963.32031.python-list@python.org>
References: <1169053011.399278.290980@a75g2000cwd.googlegroups.com>	<2%trh.15631$X72.7347@newsread3.news.pas.earthlink.net>
	<mailman.2853.1169070963.32031.python-list@python.org>
Message-ID: <eonct8$ncu$1@news.albasani.net>

Gabriel Genellina wrote:
> At Wednesday 17/1/2007 15:34, Dennis Lee Bieber wrote:
> 
>> > is there an predefined empty base class
>> > which I can instanziate to have an
>> > container i can copy attributes in?
>>
>>         I think that's a two-liner...
>>
>> >>> class EmptyBase(object):
>> ...     pass
> 
> Do you want a one liner?
> 
> class EmptyBase(object): pass
> 
> :)

Isn't "predefined" a zero liner :-;


From gherron at islandtraining.com  Fri Jan 12 04:43:42 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 12 Jan 2007 01:43:42 -0800
Subject: How to run external program?
In-Reply-To: <1168594577.397453.320380@a75g2000cwd.googlegroups.com>
References: <1168594577.397453.320380@a75g2000cwd.googlegroups.com>
Message-ID: <45A7584E.2080105@islandtraining.com>

Lad wrote:
> How  can I run external program from Python?
> I use Python with XP
> Thank you for help
> LB
>
>   
The subprocess module is what you want for this.

It's got ways of running external executables as separate subprocesses, 
and interacting with the subprocess and both its input and output.

Gary Herron



From S.Mientki-nospam at mailbox.kun.nl  Wed Jan 17 17:29:38 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Wed, 17 Jan 2007 23:29:38 +0100
Subject: Would a Dutch speaker please check this wiki page please?
In-Reply-To: <mailman.2852.1169070591.32031.python-list@python.org>
References: <mailman.2852.1169070591.32031.python-list@python.org>
Message-ID: <a9dd0$45aea341$d443bb3a$10472@news.speedlinq.nl>

skip at pobox.com wrote:
> Got a note about a new page on the Python Wiki:
> 
>>>>>> "Wade" == Wade McDaniel <wmcdaniel at wolfgangsvault.com> writes:
> 
>     http://wiki.python.org/moin/Selcuk_Altun
> 
> I suspect it's junk since it doesn't seem to mention Python and the website
> it mentions doesn't seem to exist.  Still, just in case...
The only (incorrect) Dutch sentence on the whole site is:
   "Welkom op me site www.keriwar.nl",
which should have been
   "Welkom op mijn site www.keriwar.nl"
but that could be explained, while his name "Selcuk Altun" is not orginated from the Netherlands.
I just expect that he is trying to setup a wiki,
but that's too soon to give it a judgement.

cheers,
Stef Mientki
> 
> Thx,
> 
> Skip


From michele.simionato at gmail.com  Tue Jan 16 00:21:06 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 15 Jan 2007 21:21:06 -0800
Subject: Watch log
In-Reply-To: <1168892415.324184.273210@l53g2000cwa.googlegroups.com>
References: <1168892415.324184.273210@l53g2000cwa.googlegroups.com>
Message-ID: <1168924866.691081.251880@q2g2000cwa.googlegroups.com>

Salvatore Di Fazio wrote:
> Hi guys,
> I've an application that writes a log file.
> I need to write an application with python that will read this file.

You may begin from this:

$ cat showlog.py
import sys
from ScrolledText import ScrolledText

interval =50 # ms

def displayfile(f, textwidget):
    textwidget.insert('end', f.readline())
    textwidget.after(interval, displayfile, f, textwidget)

if __name__ == '__main__':
    st = ScrolledText()
    st.pack()
    displayfile(sys.stdin, st)
    st.mainloop()

$ python showlog.py < mylogfile.log

HTH,
             Michele Simionato



From j.ersatz at nowhere.invalid  Wed Jan 10 03:28:03 2007
From: j.ersatz at nowhere.invalid (John Ersatznom)
Date: Wed, 10 Jan 2007 03:28:03 -0500
Subject: Xah's Edu Corner: Introduction to 3D Graphics Programing
References: <1166836083.084101.25870@73g2000cwn.googlegroups.com>
	<458d7899$0$8725$ed2619ec@ptn-nntp-reader02.plus.net>
	<1167208399.089326.213540@a3g2000cwd.googlegroups.com>
	<1167230356.551596.193550@73g2000cwn.googlegroups.com>
	<1167255574.202660.176530@48g2000cwx.googlegroups.com>
	<1168270858.969940.282070@42g2000cwt.googlegroups.com>
Message-ID: <eo27v6$cbf$1@aioe.org>

ajsiegel at optonline.com wrote:
> And the core folks around the project are either science educators or
> Python folks - there is little C++ expertise currently involved with
> the project.
> 
> The project is looking for help.
> 
> Anyone willing to jump in should perhaps reply here or at:
[snip address]

I see lots of mentions of C++ and Python, but not Java, so suggesting
that anyone reply "here" (i.e. comp.lang.java.programmer) seems
questionable to me.

And what the hell is wrong with my goddam newsserver? Again it
complained that a header was missing (which either should have been
there to start with or not been an error) and then when I added it that
the message was a duplicate (it was a duplicate only if the previous try
had succeeded, but it claimed the previous try had failed).

I'm thinking of ditching aioe. Anyone know of any other public, free
newsservers that permit posting as well as reading? A whole lot of Web
research has failed to turn up any besides aioe. Mind you, I found a lot
of high quality free ones that permit reading only (some with binaries!
not that I need 'em) and at least one that calls itself "free" and says
it permits posting but actually charges an "account setup fee" -- where
are truth in advertising laws when you need them? "Free" doesn't mean
"No monthly payments" or "No recurring payments", it means FREE, as in
NO PAYMENTS AT ALL, MORONS ... :P


From danb_83 at yahoo.com  Tue Jan 16 23:05:36 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 16 Jan 2007 20:05:36 -0800
Subject: How can I write code using FP
In-Reply-To: <1169003899.592015.300290@s34g2000cwa.googlegroups.com>
References: <1169003899.592015.300290@s34g2000cwa.googlegroups.com>
Message-ID: <1169006736.225375.7140@51g2000cwl.googlegroups.com>

On Jan 16, 9:18 pm, "kernel1983" <kernel1... at gmail.com> wrote:
> In Function Program?Language can use like this:
>
> define a function:
> f = lambda x,y:x,y
>
> then we use f to define another function:
> f2 = f(1)
> the f2 should equal to:
> f2=lambda y:1,y
>
> we should be able call f2 with one parameter:f2(2)
> just return 1,2
>
> but how can I implement the characteristic in Python??I think it could
> do like this but HOW-TO?
>
> thanks~~~
> I'm a English beginner!
> I wish somebody understand my meaning

If I understand correctly, you can do:

f = lambda x, y: (x, y)
f2 = lambda y: f(1, y)



From nszabolcs at gmail.com  Tue Jan 30 08:26:44 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 30 Jan 2007 05:26:44 -0800
Subject: Is any python like linux shell?
In-Reply-To: <mailman.3301.1170153234.32031.python-list@python.org>
References: <mailman.3301.1170153234.32031.python-list@python.org>
Message-ID: <1170163604.787488.194690@m58g2000cwm.googlegroups.com>


Brian Visel wrote:
> ipython is probably what you're looking for.

or
http://sourceforge.net/projects/pyshell



From ggrp1.20.martineau at dfgh.net  Wed Jan 10 10:33:56 2007
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 10 Jan 2007 07:33:56 -0800
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
	<1168042215.514023.121560@s80g2000cwa.googlegroups.com>
	<1168048620.409190.85870@v33g2000cwv.googlegroups.com>
	<1168130960.670978.111850@s34g2000cwa.googlegroups.com>
	<1168209637.965967.23790@s34g2000cwa.googlegroups.com>
Message-ID: <1168443236.166170.265770@77g2000hsv.googlegroups.com>

Carl Banks wrote:
> Martin Miller wrote:
> > Carl Banks wrote:
> >
> > > Martin Miller wrote:
> > > > ### non-redundant example ###
> > > > import sys
> > > >
> > > > class Pin:
> > > >     def __init__(self, name, namespace=None):
> > > >         self.name = name
> > > >         if namespace == None:
> > > >             # default to caller's globals
> > > >             namespace = sys._getframe(1).f_globals
> > > >         namespace[name] = self
> > > >
> > > > Pin('aap')      # create a Pin object named 'aap'
> > > > Pin('aap2')     # create a Pin object named 'aap2'
> > > > print aap.name
> > > > print aap2.name
> > >
> > > The problem with this is that it only works for global namespaces,
> > > while failing silently and subtly if used in a local namespace:
> >
> > Oh, contrair. It would work fine with local namespaces simply by
> > overriding the default value of the optional 'namepace' parameter (see
> > below).
>
> Did you try it?

Yes, but I misinterpreted the results which seemed to support my
claim. Therefore I must retract what I wrote and now have to agree
with what you said about it not working in a local namespace --
specifically in the sense that it is unable to bind the instance the
name in the caller's local namespace.

I'm not sure that this is a critical flaw in the sense that it may
not matter for some usages. For example I've seen it used to define
(yet another) Enum class which facilitated the creation of names
bound to a range or sequence of values. The fact that these couldn't
be defined local to code block wasn't apparently a big issue.


> > > def fun():
> > >     Pin('aap')
> > >     aap1 = aap
> > >     fun2()
> > >     aap2 = aap
> > >     print aap1 is aap2
> > >
> > > def fun2():
> > >     Pin('aap')
> > >
> > > If it's your deliberate intention to do it with the global namespace,
> > > you might as well just use globals() and do it explicitly, rather than
> > > mucking around with Python frame internals.  (And it doesn't make the
> > > class unusable for more straightforward uses.)
> >
> > You could be more explicit by just passing 'globals()' as a second
> > parameter to the __init__ constructor (which is unnecessary, since
> > that's effectively the default).
> >
> > It's not clear to me how the example provided shows the technique
> > "failing silently and subtly if used in a local namespace" because what
> > happens is exactly what I would expect if the constructor is called
> > twice with the same string and defaulted namespace -- namely create
> > another object and make the existing name refer to it. If one didn't
> > want the call to Pin in fun2 to do this, just change fun2 to this:
>
> Because the usage deceptively suggests that it defines a name in the
> local namespace.  Failing may be too strong a word, but I've come to
> expect a consistent behavior w.r.t. namespaces, which this violates, so
> I think it qualifies as a failure.

I don't see how the usage deceptively suggests this at all. In this
case -- your sample code for fun() and fun2() -- all were simply
Pin('aap'). Since no additional namespace argument was supplied, the
same name was bound in the defaulted global namespace each time but
to different objects. In other words the 'print aap1 is aap2'
statement produced 'false' because the call to fun2() changed the
(global) object to which 'aap' was previously bound.

>
> > def fun2():
> >     Pin('aap', locals())
>
> Did you actually try this?  ...

As I said, yes, I did, and the addition of the 'locals()' parameter
does make the 'print aap1 is aap2' statement in fun() output 'true'.
This lead me to take for granted that it had bound the name in the
local namespace. However this assumption was incorrect, but that
wasn't obvious since there were no further statements in fun2().

The problem is that there fundamentally doesn't seem to be a way to
create local variables except directly by using an assignment
statement within the block of a function or method. Modifying the
mapping returned from locals() does not accomplish this -- normally
anyway, although interestingly, it will currently if there's an exec
statement anywhere in the function, even a dummy one, but this is
not a documented feature and from what I've read just side-effect of
the way code optimization is be done to support the exec statement.


> ...  Better yet, try this function.  Make sure
> aap isn't defined as a global:
>
> def fun3():
>     Pin('aap',locals())
>     print aap
>
> (I get NameError.)

I do, too, if I run it by itself or first unbind the global left over
from
fun() with a 'del aap' statement.


> > This way the "print aap1 is aap2" statement in fun() would output
> > "true" since the nested call to Pin would now (explicitly) cause the
> > name of the new object to be put into fun2's local namespace leaving
> > the global one created by the call in fun() alone.
>
> Did you try it?

Yes -- explained above.


> > Obviously, this was not an objection I anticipated. An important one I
> > would think is the fact that the current documentation says that
> > f_globals is a special *read-only* attribute of a frame object implying
> > that it shouldn't be changed (even though doing so 'works' as my
> > example illustrates).
>
> That means it can't be rebound.  It doesn't mean you can't modify the
> object.  Nevertheless, frame objects are an internal feature of Python,
> not guaranteed to work for other incarnations of Python (it doesn't
> even exist in IronPython, for example), and subject to change.  And
> what you want to do is easily done in a platform generic way without
> using sys._getframe.

Since '_getframe' starts with an underscore, by convention it's
something private, likely an implementation detail, and therefore
not guaranteed not to change in future. Similarily the documentation
says it "should be used for internal and specialized purposes only".

Guess I should have mentioned that this was also an expected
complaint when I warned the OP that some people would oppose the use
of the technique.

My own philosophy is that it's simply a judgment call that depends
on what you're doing and what are the alternatives. Not all code is
mission-critical and even with that which is, it may perhaps be
worth the risk of possible issues later in future in order to have
something now that works in your present environment.


> > I think other valid arguments against this practice might include
> > whether it's an example of good OOP, or a good programming practice at
> > all, since it involves possibly subtle side-effects, the use of global
> > variables, and/or is 'unpythonic'.
>
> I think programmatically creating variables is fine; I just recommend
> you not use sys._getframe, nor the automagical namespace self-insertion
> class, to do it.

You've explained some of your worries about sys._getframe. It would
be interesting to hear specifically what it is you don't like about
the idea of namespace self-insertion -- mainly because of the local
namespace limitation?


> > Certainly the approach is not without caveats. Despite them, I believe
> > it can be useful in some contexts, as long as what is going on is
> > clearly understood. The point of my reply to the OP was mainly just to
> > illustrate the power and flexibility of Python to the newbie. I guess
> > to that I should have also added that it gives you "enough rope to
> > shoot yourself" as Allen Holub said regarding C++.
> >
> > Cheers,
> > -Martin
>
> Carl Banks

Regards,
-Martin



From nogradi at gmail.com  Sat Jan 13 06:49:32 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sat, 13 Jan 2007 12:49:32 +0100
Subject: Barcode recognition in Python
In-Reply-To: <1168676514.115592.181620@v45g2000cwv.googlegroups.com>
References: <1168676514.115592.181620@v45g2000cwv.googlegroups.com>
Message-ID: <5f56302b0701130349t317f375av10713d489577c74e@mail.gmail.com>

> I am searching for a python library for barcode recognition. We have
> developed a rather complex application for document tracking and
> document management in python/Zope, called PAFlow (www.paflow.it:
> sorry, most of the information is in Italian...).
>
> As our project is completely free software, we will need a library that
> is free software too.
>
> Is there something like this in python ?


http://www.google.com/search?q=barcode+recognition+python


From rpdooling at gmail.com  Sat Jan 13 22:59:17 2007
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 13 Jan 2007 19:59:17 -0800
Subject: indentation in python
In-Reply-To: <1168742956.828457.287610@m58g2000cwm.googlegroups.com>
References: <1168742956.828457.287610@m58g2000cwm.googlegroups.com>
Message-ID: <1168747148.932238.51880@51g2000cwl.googlegroups.com>

lee wrote:
> Can anyone tell me the basics about indentation in python......how we
> use it in loops and constructs..etc....

http://docs.python.org/tut/node5.html#SECTION005200000000000000000



From S.Mientki-nospam at mailbox.kun.nl  Mon Jan 22 14:44:42 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Mon, 22 Jan 2007 20:44:42 +0100
Subject: Python Windows Editors
In-Reply-To: <ep33ul$6cr$1@atlantis.news.tpi.pl>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<ep33ul$6cr$1@atlantis.news.tpi.pl>
Message-ID: <ea71a$45b5141c$d443bb3a$3908@news.speedlinq.nl>

  Any text editor is only as good as the
> programmer who uses it. ;)
> 
Yes but an IDE is different ;-)

cheers,
Stef Mientki


From jon at ffconsultancy.com  Mon Jan  1 13:56:47 2007
From: jon at ffconsultancy.com (Jon Harrop)
Date: Mon, 01 Jan 2007 18:56:47 +0000
Subject: Writing more efficient code
References: <mailman.2185.1167676577.32031.python-list@python.org>
Message-ID: <459959ea$0$8719$ed2619ec@ptn-nntp-reader02.plus.net>

gonzlobo wrote:
> I picked up Python a few weeks ago, and have been able to parse large
> files and process data pretty easily, but I believe my code isn't too
> efficient. I'm hoping dictionaries will help out, but I'm not sure the
> best way to implement them.
> 
> I've been using a bunch of nested if/elif/else statements to select
> slices (0317 & 03de) from a file, then parse the data (aa, hh, bb,
> d2-d9) into parameters (a = airspeed, h = heading) & flags.
> 
> #sample file contents
> 0000007d 03 0317 aa aa aa aa aa hh hh hh bb bb
> 0000007e 06 03de d2 d3 d4 d5 d6 d7 d8 d9 10 11
> 
> # some pseudo code
> if PID == '03de':
>     flapsCmd = int(d3, 16)
>    if flapsCmd == 0xc0:
>       <flaps up code>
>    elif flapsCmd == 0x03:
>       <flaps down code>
> if PID == '0317':
>    airspeed == 'combine aa for airspeed & multiply by 0.1'
>    heading == 'combine hh for heading'
>    mach == 'combine bb for mach & multiply by 0.01'
> 
> Might dictionaries help in this case... say Label0317(parameterName,
> slice (d3), scaleFactor(0.1))... I'd like to use them if they'll
> replace the dozens of nested conditionals.

Sounds like you want pattern matching over lists:

  | 0x03 :: 0xde :: 0xc0 :: t -> <flaps up code>
  | 0x03 :: 0xde :: 0x03 :: t -> <flaps down code>
  | 0x03 :: 0x17 :: t -> ...

That's OCaml code which finds patterns in sequences of bytes, just like the
ones you're searching for.

> I have roughly 75 
> different parameters to decode from a file containing ~2.5 million
> lines of data.
> 
> I know my pseudo code lacks details, but hopefully I'm getting my
> point across...
> 
> (I suppose switch/select/case statements would help a bit, but python
> doesn't seem to use them... not to start a religious war or anything).

Pattern matching is "switch" on steroids.

OCaml's pattern matcher is very sophisticated and very fast. You'll probably
shrink your code by several fold whilst also having it run a few orders of
magnitude faster and having it statically checked, so it will be more
reliable.

You might want to look at any language with pattern matching: OCaml, SML,
Haskell, F#, Mathematica etc. If you're running Windows then F# is a .NET
language...

-- 
Dr Jon D Harrop, Flying Frog Consultancy
Objective CAML for Scientists
http://www.ffconsultancy.com/products/ocaml_for_scientists/index.html?usenet


From deets at nospam.web.de  Fri Jan  5 03:11:28 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 05 Jan 2007 09:11:28 +0100
Subject: C/C++, Perl, etc. to Python converter
In-Reply-To: <sA2nh.13518$yC5.6094@newssvr27.news.prodigy.net>
References: <G3Qmh.94$9v1.124@nntpserver.swip.net>	<1167839629.435980.311750@k21g2000cwa.googlegroups.com>
	<mailman.2245.1167841661.32031.python-list@python.org>
	<5034u9F1dg9r9U1@mid.uni-berlin.de>
	<sA2nh.13518$yC5.6094@newssvr27.news.prodigy.net>
Message-ID: <506fhgF1efoisU1@mid.uni-berlin.de>

>> It is definitely _not_ possible. There are so many design decisions 
>> that are differing based on what a language offers - e.g. generators, 
>> garbage collection, precise control over memory layout and so on.
> 
>    Inter-language translators have been written.  There's usually
> a performance penalty, which can be severe when the idioms of
> the languages are quite different.

The point discussed here was not the feasibility of language-translators 
per se. These are certainly possible, yet I doubt that e.g. C++2Python 
would really come to existence.

Thomas expressed his belief that a _idiomatic_ translator was possible. 
And that certainly isn't the case.

Diez


From sebastien.thur at laposte.net  Wed Jan 17 03:08:52 2007
From: sebastien.thur at laposte.net (seb)
Date: 17 Jan 2007 00:08:52 -0800
Subject: connection to server not accepted (but no error) only after
	several hours
In-Reply-To: <Ip8rh.15194$X72.12298@newsread3.news.pas.earthlink.net>
References: <1168961973.099821.318920@l53g2000cwa.googlegroups.com>
	<Ip8rh.15194$X72.12298@newsread3.news.pas.earthlink.net>
Message-ID: <1169021332.523258.192510@s34g2000cwa.googlegroups.com>

Hi Dennis,

I am using indeed using python logging in the appel_log2 module.
But I wanted to keep it extremly simple while accepting connection from
different processes or thread.

Regarding my main problem, I did some more testing :

1) I have enabled one time server that can be run as a service (R C C
time server) and this service is responding correctly, when at the same
time (before I kill it ) the python time server is not responding.

2) I have also tried two python time server downloaded from effbot
site. Both are not responding after the "non response from the time
server I rn" even for the first interrogation once they are started.
(Of course I have killed my time server when I run a new one).
Same behaviour no response given but no error neither.

3)
If I try to start the R c c time server when the python time server is
running there is an error (from the rcc service)
The python time server program is really bound to port 37.

if we look at the previous tests :

4)
The same python program runned on port 38 aftter the blocking is
working properly from the start.

5)
There is no exception on the python time server whether it is
responding or not.

--------------------------
partial conclusion
-------------------------

It is only python programs that are listening from the port 37 that are
blocked at a certain time.
How is it possible (without firewall enabled) ?

Thanks .
Sebastien.


Dennis Lee Bieber a ?crit :
> On 16 Jan 2007 07:39:35 -0800, "seb" <sebastien.thur at laposte.net>
> declaimed the following in comp.lang.python:
>
> >
> > Once it is blocked, I killes it, wait for about 15 minutes without
> > running the server and then started again but this gives me the same
> > behaviour (no response).
> >
> 	Can't help with the lock-up problem... but...
> >
> > import socket
> > import struct, time
> > import threading
> > import os
> > import appel_log2 as appel_log
> > import sys
> >
> >
> > class TimeServer(threading.Thread) :
> > 	def __init__(self):
> > 		nom_function_actuelle= str(sys._getframe().f_code.co_filename)
> > +"___"+str(sys._getframe().f_code.co_name)
> > 		try :
> > 			threading.Thread.__init__(self)
> > 			self.log_file="timeserverlog.txt"
> > 			self.PORT=37
> > 			self.TIME1970=2208988800L
> > 			self._continue=1
> > 			self.time_shift=0
> > 			message=nom_function_actuelle+"\t "+"STARTED OK "
> > 			appel_log.write_log("info",message)
>
> 	Have you considered using Python's logging module?
> > 	while 1==1 :
>
> 	Redundant test...
>
> 	In all historical versions of Python
>
> 	while 1:
>
> sufficed, and newer versions have
>
> 	while True:
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/



From sebastien.thur at laposte.net  Tue Jan 16 10:39:35 2007
From: sebastien.thur at laposte.net (seb)
Date: 16 Jan 2007 07:39:35 -0800
Subject: connection to server not accepted (but no error) only after several
	hours
Message-ID: <1168961973.099821.318920@l53g2000cwa.googlegroups.com>

Hi, this simple server (time protocol) does not respond after a few
hours, even when it is restarted. The behaviour looks to me like a
firewall blocking but I have desabled the firewall.
Using Netstat - a I find the server listed when it is running and not
listed when I stop it.
The server starts whith no error. But after about 6-8 hours there is no
way to make it respond again (even when it is restarted).

Once it is blocked, I killes it, wait for about 15 minutes without
running the server and then started again but this gives me the same
behaviour (no response).

The solution at this time is to reboot windows !!!

I have also tried to run it twice in order to get the exception that
the port is already used and an exeption is raised.
I have tried from another computer to connect to mine but it does not
manage.
  When I change the port in the server it responds immediatly.

I am running winXP SP2, python 2.4.

Do you have any clues ?
Thanks in advance.
Seb.

PS : I am calling this server from another program and make it run in a
thread.
Below is the standalone version (wich is adpated from effbot site).

import socket
import struct, time
import threading
import os
import appel_log2 as appel_log
import sys


class TimeServer(threading.Thread) :
	def __init__(self):
		nom_function_actuelle= str(sys._getframe().f_code.co_filename)
+"___"+str(sys._getframe().f_code.co_name)
		try :
			threading.Thread.__init__(self)
			self.log_file="timeserverlog.txt"
			self.PORT=37
			self.TIME1970=2208988800L
			self._continue=1
			self.time_shift=0
			message=nom_function_actuelle+"\t "+"STARTED OK "
			appel_log.write_log("info",message)
		except Exception, e :
			message=nom_function_actuelle+"\t "+"PB:::"+str(e)
			print message
			appel_log.write_log("warning",message)

	def set_log_file(self, file):
		nom_function_actuelle= str(sys._getframe().f_code.co_filename)
+"___"+str(sys._getframe().f_code.co_name)
		if os.path.exists(file):
			pass
		else :
			f=open(file,"w")
			f.close()
		self.log_file=file
		print "log file ",self.log_file
		self.log_file=file

	def reset_log_file(self):
		nom_function_actuelle= str(sys._getframe().f_code.co_filename)
+"___"+str(sys._getframe().f_code.co_name)
		print "resetting log file "
		if os.path.exists(self.log_file):
			f=open(self.log_file,"w")
			f.close()

	def set_time_shift(self,time_shift):
		self.time_shift=time_shift

	def run(self):
		nom_function_actuelle= str(sys._getframe().f_code.co_filename)
+"___"+str(sys._getframe().f_code.co_name)
		socket.timeout(1)
		service=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
		service.bind(("", self.PORT))
		service.listen(1)
		print "listening on port", self.PORT
		while self._continue==1 :
    			channel, info = service.accept()
    			print "connection from", info
			message=str(time.time())+"\t"+str(time.asctime())+"\t"+str(info)+"\n"
			g=open(self.log_file,"a")
			g.write(message)
			g.close()
    			t = int(time.time()) + self.TIME1970 + self.time_shift
			t = struct.pack("!I", t)
    			channel.send(t) # send timestamp
   			channel.close() # disco
			m=nom_function_actuelle+" response OK "+str(info)
			appel_log.write_log("info",m)
			#print "apres m "
		print "time server self_continue=0"
		appel_log.write_log("warning",nom_function_actuelle+"\t
self._continue ="+str(self._continue))
		print "sortie du thread"

def main() :
	a=TimeServer()
	a.start()
	a.set_log_file("log_nw.txt")
	a.reset_log_file()
	while 1==1 :
		time.sleep(10)
		#a._continue=0
		pass
	time.sleep(2)

main()



From deets at nospam.web.de  Wed Jan  3 10:31:50 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 03 Jan 2007 16:31:50 +0100
Subject: code optimization (calc PI)
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
Message-ID: <5020j6F1du59cU1@mid.uni-berlin.de>

mm wrote:

> (Yes, I konw whats an object is...)
> BTW. I did a translation of a pi callculation programm in C to Python.
> (Do it by your own... ;-)

Is that a question on how to optimize code you won't show us? If yes, I'm
sorry to tell you that crystal balls are short these days. Too much
new-year-outlooks.

Diez


From ramashish.lists at gmail.com  Mon Jan 22 01:12:26 2007
From: ramashish.lists at gmail.com (Ramashish Baranwal)
Date: 21 Jan 2007 22:12:26 -0800
Subject: Accessing class variables in staticmethods.
References: <1169412557.737589.105120@a75g2000cwd.googlegroups.com>
	<mailman.2960.1169413216.32031.python-list@python.org>
Message-ID: <1169446346.871829.76500@a75g2000cwd.googlegroups.com>

Sam wrote:
> On 21 Jan 2007 12:49:17 -0800, Ramashish Baranwal
> <ramashish.lists at gmail.com> wrote:
> > class Base:
> >     staticvar = 'Base'
> >
> >     @staticmethod
> >     def printname():
> >         # this doesn't work
> >         # print staticvar
> >         # this does work but derived classes wouldn't behave as I want
> >         print Base.staticvar
> >
> > class Derived(Base):
> >     staticvar = 'Derived'
> >
> > Base.printname() # should print 'Base'
> > Derived.printname() # should print 'Derived'
> >
> > Any idea on how to go about this? Also from a staticmethod how can I
> > find out other attributes of the class (not objects)? Do static methods
> > get some classinfo via some implicit argument(s)?
>
> No, staticmethods get told nothing about the class they're being
> defined in. What you want is a classmethod, which gets passed the
> class to work with.
>
> Using classmethods, your code becomes:
>
> #untested, bear in mind
> class Base:
>     staticvar = 'Base'
>
>     @classmethod
>     def printname(cls):
>         print cls.staticvar
>
> class Derived(Base):
>     staticvar = 'Derived'
>
> Base.printname() #prints 'Base'
> Derived.printname() #prints 'Derived'
>
> Incidentally, you can also use cls.__name__ for this purpose, but I
> guess that your actual motivation for this is more complicated than
> class names.

Thanks Sam, using classmethod works. You guessed it correctly, my
actual motivation is more complicated but on the same line.

-Ram



From emin.shopper at gmail.com  Wed Jan 17 11:08:53 2007
From: emin.shopper at gmail.com (Emin)
Date: 17 Jan 2007 08:08:53 -0800
Subject: question about module resolution
Message-ID: <1169050133.438101.90030@a75g2000cwd.googlegroups.com>

Dear Experts,

I often find myself wanting to have a child module get some parameters
defined in a parent module. For example, imagine  I have the following
directory structure and want something in baz.py to look at a value in
config.py. I end up putting in things like import sys;
sys.path.append('../..'). Is there a better way?

foo/
     __init__.py
     config.py
     bar/
          __init__.py
          baz.py



From istvan.albert at gmail.com  Wed Jan 10 15:04:44 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: 10 Jan 2007 12:04:44 -0800
Subject: Announcement -- ZestyParser
References: <1168407920.281020.147680@k58g2000hse.googlegroups.com>
	<mailman.2542.1168453354.32031.python-list@python.org>
Message-ID: <1168459484.164931.65460@k58g2000hse.googlegroups.com>


Terry Reedy wrote:

> I would like to look at the examples online (along with the doc file)
> before downloading this and setuptools and installing, so I can see what
> it actually looks like in use.

Yes, I second that.

I poked around for a little while but could not find a single example.
Then I gave up as I'm not going to install something before knowing
what it is.

i.



From smusnmrNOSPAM at yahoo.com  Thu Jan  4 08:12:17 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Thu, 4 Jan 2007 14:12:17 +0100
Subject: pow() works but sqrt() not!?
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de><1167899693.759071.51450@31g2000cwt.googlegroups.com><enig9a$cncb$1@zam602.zam.kfa-juelich.de>
	<mailman.2282.1167913096.32031.python-list@python.org>
Message-ID: <eniuf8$cq4v$1@zam602.zam.kfa-juelich.de>

Thanks for the explanation. I am astonished what an interpreted language is 
able to do!

"Fredrik Lundh" <fredrik at pythonware.com> schrieb im Newsbeitrag 
news:mailman.2282.1167913096.32031.python-list at python.org...
> "siggi" wrote:
>
>> Nope, I did not! But I used sqrt(9), and not math.sqrt(9). The latter 
>> works
>> excellent, thank you! From now on, I will use "import math" and
>> "math.fuction()" for EVERY mathematical function, even for pow() etc. 
>> just
>> to be on the safe side!
>
> pow and math.pow are two slightly different things, though.  pow() works 
> on
> any type that supports power-of operations (via the __pow__ hook), while
> math.pow treats everything as a 64-bit float:
>
>>>> math.pow(2, 200)
> 1.6069380442589903e+060
>
>>>> pow(2, 200)
> 1606938044258990275541962092341162602522202993782792835301376L
>
> pow also takes a third modulo argument (pow(x,y,z) is equivalent to 
> pow(x,y) % z,
> but can be implemented more efficiently for certain data types).
>
> </F>
>
> 




From jordan.taylor2 at gmail.com  Thu Jan 25 13:02:29 2007
From: jordan.taylor2 at gmail.com (Jordan)
Date: 25 Jan 2007 10:02:29 -0800
Subject: running applications in python
In-Reply-To: <1169746124.376610.139420@13g2000cwe.googlegroups.com>
References: <1169746124.376610.139420@13g2000cwe.googlegroups.com>
Message-ID: <1169748148.918473.37840@k78g2000cwa.googlegroups.com>

os.system, os.spawn, the process module, os.popen[1,2,3,4], this is a
pretty basic thing, not trying to be mean, but you should look in the
python docs, this is definitely in there.  Also, the subprocess module
is meant to replace all of those but i haven't looked too closely at it
yet, so the following might not be perfect.

import subprocess as sp
sp.call(['wmplayer.exe', 'some_args_probably_a_movie_name'])

you'll probably need to use the full path for media player, and the
call() function is a simplified command within the subprocess module,
useful if you don't really need to redirect input/output/errors or
other aspects of the opened application.    Also, you'll probably want
something more like:  retcode = sp.call(...), so that you can check the
return code to see if it was successful.  Check out the subprocess
module.

Cheers,
Jordan

On Jan 25, 12:28 pm, "lee" <libi... at gmail.com> wrote:
> how can i run or open a windows application from the python prompt?for
> e.g.mediaplayer opening,folder acess etc



From brent.chambers at gmail.com  Tue Jan  2 14:33:23 2007
From: brent.chambers at gmail.com (brent.chambers at gmail.com)
Date: 2 Jan 2007 11:33:23 -0800
Subject: Python embedded interpreter: how to initialize the interpreter ?
In-Reply-To: <mailman.2206.1167752577.32031.python-list@python.org>
References: <1167573333.723607.199480@v33g2000cwv.googlegroups.com>
	<mailman.2206.1167752577.32031.python-list@python.org>
Message-ID: <1167766403.470097.71890@i12g2000cwa.googlegroups.com>

> >the interpreter emits an error: tkinter module not defined

Capitalize the 't', in Tkinter, its case sensitive.



From bdesth.quelquechose at free.quelquepart.fr  Tue Jan 16 17:54:00 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 16 Jan 2007 23:54:00 +0100
Subject: How can I create a linked list in Python?
In-Reply-To: <eojb9v$92rq$1@netnews.upenn.edu>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<eojb9v$92rq$1@netnews.upenn.edu>
Message-ID: <45ad5104$0$393$426a74cc@news.free.fr>

Dongsheng Ruan a ?crit :
> Thanks for your kindly help.
> I am new CS student taking datat structure and algorithms with AHO's book 
> with the same title.
> 
> The book is done in Pascal, which might be an outdated language.

Yes, somehow - but note, that linked lists are the central data 
structure of Lisp, which is probably the older programming language 
still in use...

Implementing linked lists in Python is not a great deal - it just 
doesn't make much sens. It's IMHO much more interesting to learn this 
kind of stuff with a low-level language like C or Pascal.


> However, my instructor probably wants us to understand the list ADT better 
> by not using the built in list in Python.

Indeed !-)



From fumanchu at amor.org  Mon Jan 15 19:02:03 2007
From: fumanchu at amor.org (fumanchu)
Date: 15 Jan 2007 16:02:03 -0800
Subject: Conflicting needs for __init__ method
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<pan.2007.01.15.03.43.54.630644@REMOVEME.cybersource.com.au>
	<pan.2007.01.15.04.00.13.948798@REMOVEME.cybersource.com.au>
Message-ID: <1168905723.452739.8600@a75g2000cwd.googlegroups.com>

Steven D'Aprano wrote:
> > class Rational(object):
> >     def __init__(self, numerator, denominator):
> >         print "lots of heavy processing here..."
> >         # processing ints, floats, strings, special case arguments,
> >         # blah blah blah...
> >         self.numerator = numerator
> >         self.denominator = denominator
> >     def __copy__(self):
> >         cls = self.__class__
> >         obj = cls.__new__(cls)
> >         obj.numerator = self.numerator
> >         obj.denominator = self.denominator
> >         return obj
> >     def __neg__(self):
> >         obj = self.__copy__()
> >         obj.numerator *= -1
> >         return obj
>
>
> Here's a variation on that which is perhaps better suited for objects with
> lots of attributes:
>
>     def __copy__(self):
>         cls = self.__class__
>         obj = cls.__new__(cls)
>         obj.__dict__.update(self.__dict__) # copy everything quickly
>         return obj

I recently had to do something similar for my ORM, where a
user-instantiated object gets expensive default values, but the back
end just overwrites those defaults when "resurrecting" objects, so it
shouldn't pay the price. However (and this is the tricky part), I also
wanted to allow subclasses to extend the __init__ method, so just using
cls.__new__(cls) didn't quite go far enough. Here's what I ended up
with [1]:

    def __init__(self, **kwargs):
        self.sandbox = None

        cls = self.__class__
        if self._zombie:
            # This is pretty tricky, and deserves some detailed
explanation.
            # When normal code creates an instance of this class, then
the
            # expensive setting of defaults below is performed
automatically.
            # However, when a DB recalls a Unit, we have its entire
properties
            # dict already and should skip defaults in the interest of
speed.
            # Therefore, a DB which recalls a Unit can write:
            #     unit = UnitSubClass.__new__(UnitSubClass)
            #     unit._zombie = True
            #     unit.__init__()
            #     unit._properties = {...}
            # instead of:
            #     unit = UnitSubClass()
            #     unit._properties = {...}
            # If done this way, the caller must make CERTAIN that all
of
            # the values in _properties are set, and must call
cleanse().
            self._properties = dict.fromkeys(cls.properties, None)
        else:
            # Copy the class properties into self._properties,
            # setting each value to the UnitProperty.default.
            self._properties = dict([(k, getattr(cls, k).default)
                                     for k in cls.properties])

            # Make sure we cleanse before assigning properties from
kwargs,
            # or the new unit won't get saved if there are no further
changes.
            self.cleanse()

        for k, v in kwargs.iteritems():
            setattr(self, k, v)

The _zombie argument is therefore a flag which allows you to keep the
initialization code inside __init__ (rather than repeating it inside
every method).


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org

[1] http://projects.amor.org/dejavu/browser/trunk/units.py#l552



From basti.wiesner at gmx.net  Sun Jan  7 13:16:49 2007
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sun, 07 Jan 2007 19:16:49 +0100
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
	<mailman.2394.1168189690.32031.python-list@python.org>
Message-ID: <enrdeh$utj$01$1@news.t-online.com>

[ Thomas Ploch <Thomas.Ploch at gmx.net> ]

> sturlamolden schrieb:
>> time.swift at gmail.com wrote:
>>> Coming from a C++ / C# background, the lack of emphasis on private
>>> data seems weird to me. I've often found wrapping private data
>>> useful to prevent bugs and enforce error checking..
>>>
>>> It appears to me (perhaps wrongly) that Python prefers to leave
>>> class
>>> data public.  What is the logic behind that choice?
>> 
>> The designers of Java, C++, C#, Ada95, Delphi, etc. seem to think
>> that if an object's 'internal' variables or states cannot be kept
>> private, programmers get an irresistible temptation to mess with them
>> in malicious ways. But if you are that stupid, should you be
>> programming in any language? The most widely used language is still
>> C, and there is no concept of private data in C either, nor is it
>> needed.
> 
> There is a kind of this concept in C with 'static' declarations.
> 
>> As mentioned in other replies, it is not rocket science to access a
>> class private data. In C++ you can cast to void*, in Java and C# you
>> can use reflection. C++ is said to be an "unsafe" language because
>> programmers can, using a few tricks, mess with the vtables. But how
>> many really do that?
> 
> Exactly, if they were available, a lot more would do that. I think
> this is the point. Programmers who can do that normally are sensible
> towards that people who have designed this or that knew what they were
> doing. But there are enough people that don't have a clue and _will_
> fiddle around and then flame all kind of mailing lists with requests
> for help cause they did it wrong.

Those people deserve to fail for being just extraordinary stupid...

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From rkmr.em at gmail.com  Mon Jan 29 21:45:40 2007
From: rkmr.em at gmail.com (mark)
Date: Mon, 29 Jan 2007 18:45:40 -0800
Subject: creating a dictionary
Message-ID: <e04d2e90701291845v46f56c7eged842e7a7b6d99e@mail.gmail.com>

i have few variables and i want to create a dictionary with these variables
such that the keys are the variable names and the corresponding values
are the variable values.how do i do this easily?
for ex:
var1='mark'
var2=['1','2','3']
my_dict = create_my_dictionary(var1, var2)

and my_dict is {'var1':'mark', 'var2':['1','2','3']}

is there a function for create_my_dictionary?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070129/5f0be9eb/attachment.html>

From yinxianglong at gmail.com  Sat Jan 20 01:57:30 2007
From: yinxianglong at gmail.com (=?GB2312?B?0vzP6cH6?=)
Date: Sat, 20 Jan 2007 14:57:30 +0800
Subject: How to implement recording scripts of operating IE as loadrunner?
Message-ID: <977252d80701192257n5d3fd0f2n904fff09d2846135@mail.gmail.com>

hello all.
I intend to implement recording scripts of operating IE as the function of
loadrunner. How can I implement in python.
Any suggestions would be appreciated.

XiangLong
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070120/9129e2f9/attachment.html>

From steven.bethard at gmail.com  Sun Jan 28 01:37:13 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 27 Jan 2007 23:37:13 -0700
Subject: distutils, sdist and tests
In-Reply-To: <mailman.3240.1169963498.32031.python-list@python.org>
References: <Jaudna0fMYmIBCbYnZ2dnUVZ_sKunZ2d@comcast.com>	<mailman.3235.1169934632.32031.python-list@python.org>	<udOdnWW5l4N-jCHYnZ2dnUVZ_v-tnZ2d@comcast.com>	<mailman.3237.1169954787.32031.python-list@python.org>	<Ka6dnVhMa4-CqyHYnZ2dnUVZ_syunZ2d@comcast.com>
	<mailman.3240.1169963498.32031.python-list@python.org>
Message-ID: <4a6dnWtvro0L2SHYnZ2dnUVZ_vzinZ2d@comcast.com>

Robert Kern wrote:
> Steven Bethard wrote:
>> Robert Kern wrote:
> 
>>> Are you sure that you don't have changes left over in your setup.py when you
>>> tested that?
>> Yep.  (Though I still cleared everything out and tried it again.) 
>> Here's what I got using an unmodified setup.py and the MANIFEST.in you 
>> suggested.  Note that the "bdist" version is putting test_argparse.py 
>> into site-packages.
> 
>>  > python setup.py bdist_dumb
>> running bdist_dumb
>> running build
>> running build_py
>> installing to build\bdist.win32\dumb
>> running install
>> running install_lib
> 
> Are you sure that you removed the build/ directory?

Ahh thanks.  Sorry I thought I was supposed to remove the old stuff from 
dist/ not from build/.  Yes, I get the same behavior as you do when I 
remove build/.  Sorry for the confusion!

Steve


From Barry.Carroll at psc.com  Wed Jan 17 15:44:20 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Wed, 17 Jan 2007 12:44:20 -0800
Subject: OT: Apology
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A84@eugsrv400.psc.pscnet.com>

Greetings:

I've been trying to get the contributors to this thread to move their
discussion to a more appropriate forum, but the unintended result has
been more spam on this forum.  My apologies to the regular readers of
this newsgroup.  This will be my last public post on this subject.  I
just hope the other posters will follow suit.  

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed


> -----Original Message-----
> From: st911 at rock.com [mailto:st911 at rock.com]
> Sent: Wednesday, January 17, 2007 12:24 PM
> To: python-list at python.org
> Subject: Re: *POLL* How many sheeple believe in the 911 fairy tale and
> willingto accept an Orwellian doublespeak and enslavement world ?
> 
> 
> David Bostwick wrote:
> > In article <1169061116.677288.213840 at 38g2000cwa.googlegroups.com>,
> st911 at rock.com wrote:
> > >
> > >David Bostwick wrote:
> >
> > [...]
> >
> > >Indeed, the 19 hijacker theory is a fairy tale based on illogical
> > >forensic investigation.
> > >As for dissent, Bush is on video record to utter, "Lets not
tolerate
> > >any conspiracy theories."
> > >The video is floating on the internet for you to see if you had the
IQ
> > >to search for it.
> > >
> >
> > No, I think I'm smart enough to find it.  I just don't care to waste
> time on
> > crackpot theories.  Good ad hominem, though - "You disagree with me,
so
> you
> > must be an idiot."  Judging from where you posted this, you're the
> clueless
> > one.
> 
> You dont have to waste any time. google seach is very fast. I already
> posted links for you. These are even videos so if you are challenged
> to read english prose, that wont be a handicap.
> 




From lakshmikarri at gmail.com  Wed Jan 24 11:02:14 2007
From: lakshmikarri at gmail.com (lucky)
Date: 24 Jan 2007 08:02:14 -0800
Subject: The blog on Pc trouble shooting skills,Networking,Linux
Message-ID: <1169654534.808621.309100@13g2000cwe.googlegroups.com>

HI Friends
This blog is very useful to all sections of people.

For Pc trouble shooting skills,Linux,Html Webdesigning,Free
softwares,Networking skills,Gaming news and For Tips visit the blog:

http://technodata.blogspot.com



From tjreedy at udel.edu  Mon Jan 29 02:24:24 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 29 Jan 2007 02:24:24 -0500
Subject: Data structure and algorithms
References: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
Message-ID: <epk7f5$6ha$1@sea.gmane.org>


"azrael" <jura.grozni at gmail.com> wrote in message 
news:1170024965.321036.206010 at m58g2000cwm.googlegroups.com...
| Hy, i am a student and in 2 days I am writing a test in data
| structures and algorithms. I've done my homework and understood all
| the implementations and structures. My profesor was so kind to allow
| us to use any programing language we want, and I'd like to use
| pythhon. At the first look it looked great, but we are not allowed to
| use the built in functions like append(), so i have to write my own.
| I tried it like this:
|
| class Node:
|  def __init__(self, cargo=None, next=None):
|    self.cargo = cargo
|    self.next  = next
|
|  def __str__(self):
|    return str(self.cargo)
|
|
| then
|
| >>> node1 = Node(1)
| >>> node2 = Node(2)
| >>> node3 = Node(3)
|
| >>> node1.next = node2
| >>> node2.next = node3

This is the standard idiom in Python for linked lists and other linked 
structures and perhaps what you should be doing.

|
| but this was not dinamicly enough for me (or my prof.) so

dynamic?  I have no idea what you mean by 'not dynamic enough'.

Python is not C or C++.  It does not have pointers.  Trying to program in C 
in Python does not work too well.

Terry Jan Reedy





From steven.bethard at gmail.com  Wed Jan 31 23:23:26 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 31 Jan 2007 21:23:26 -0700
Subject: How to sort using hash's key?
In-Reply-To: <mailman.3381.1170289483.32031.python-list@python.org>
References: <mailman.3375.1170284622.32031.python-list@python.org>	<wt-dnXMFALATslzYnZ2dnUVZ_qXinZ2d@comcast.com>
	<mailman.3381.1170289483.32031.python-list@python.org>
Message-ID: <HPmdnbBJ44qr9lzYnZ2dnUVZ_vbinZ2d@comcast.com>

Ben Finney wrote:
> Steven Bethard <steven.bethard at gmail.com> writes:
> 
>> JoJo wrote:
>>> I want to sort a dict via its key,but I have no idea on how to do
>>> it.
>>>>> d = dict(a=2, b=1)
>>>>> for key in sorted(d):
>> ...     print key, d[key]
>> ...
>> a 2
>> b 1
> 
> That's not a solution to "sort the dict"; that's getting a particular
> representation of the dict. It's likely the original poster wants the
> equivalent to list.sort() instead of a one-time output of the
> contents.

Yes, but as others have pointed out, you can't get that with a standard 
Python dict.  99% of the time when a poster asks about how to sort a 
dict, their problem can be solved by simply sorting the dict keys or values.

STeVe


From cesar.ortiz at gmail.com  Fri Jan  5 06:09:30 2007
From: cesar.ortiz at gmail.com (cesar.ortiz at gmail.com)
Date: 5 Jan 2007 03:09:30 -0800
Subject: Using sax libxml2 html parser
Message-ID: <1167995370.789361.43410@v33g2000cwv.googlegroups.com>

Hi all,

I have created an example using libxml2 based in the code that appears
in http://xmlsoft.org/python.html.
My example processes an enough amount of html files to see that the
memory consumption rises till the process ends (I check it with the
'top' command).

I don?t know if I am forgetting something in the code, as I have not
been able to find any example on the web.

Thanks in advance, Cesar

Note: I have also tried to put the cleanup functions inside the 'for'
loop.

****************************************] The Code
[****************************************

#!/usr/bin/python -u
import libxml2

#------------------------------------------------------------------------------


# Memory debug specific
libxml2.debugMemory(1)

#------------------------------------------------------------------------------

class callback:
    def startDocument(self):
            print "."

    def endDocument(self):
        pass

    def startElement(self, tag, attrs):
        pass

    def endElement(self, tag):
        pass

    def characters(self, data):
        pass

    def warning(self, msg):
        pass

    def error(self, msg):
        pass

    def fatalError(self, msg):
        pass

#------------------------------------------------------------------------------
#------------------------------------------------------------------------------

import os
import sys

programName = os.path.basename(sys.argv[0])

if len(sys.argv) != 2:
  print "Use: %s <dir html files>" % programName
  sys.exit(1)

inputPath = sys.argv[1]

if not os.path.exists (inputPath):
  print "Error: directory does not exist"
  sys.exit(1)

inputFileNames = []
dirContent = os.listdir(inputPath)
for fichero in dirContent:
  extension1=fichero.rfind(".htm")
  extension2=fichero.rfind(".html")
  dot = fichero.rfind(".")
  extension = max(extension1,extension2)
  if extension != -1 and extension == dot:
      inputFileNames.append (fichero)

if len(inputFileNames) == 0:
  print "Error: no input files"
  sys.exit(1)


handler = callback()
NUM_ITERS = 5
for i in range(NUM_ITERS):
  for inputFileName in inputFileNames:
    print inputFileName
    inputFilePath = inputPath + inputFileName
    f = open(inputFilePath)
    data = f.read()
    f.close()

    ctxt = libxml2.htmlCreatePushParser(handler, "", 0, inputFileName)

    ctxt.htmlParseChunk(data, len(data), 1)
    ctxt = None


# Memory debug specific
libxml2.cleanupParser()
if libxml2.debugMemory(1) == 0:
    print "OK"
else:
    print "Memory leak %d bytes" % (libxml2.debugMemory(1))
    libxml2.dumpMemory()

# Other cleanup functions
#libxml2.cleanupCharEncodingHandlers()
#libxml2.cleanupEncodingAliases()
#libxml2.cleanupGlobals()
#libxml2.cleanupInputCallbacks()
#libxml2.cleanupOutputCallbacks()
#libxml2.cleanupPredefinedEntities()



From tennessee at tennessee.id.au  Sun Jan  7 19:45:43 2007
From: tennessee at tennessee.id.au (Tennessee Leeuwenburg)
Date: Mon, 8 Jan 2007 11:45:43 +1100
Subject: Python Papers: Submission Deadline Imminent for Volume 2
Message-ID: <43c8685c0701071645ia621e36u47b4ee1fdeb6ff27@mail.gmail.com>

 Submission Deadline Imminent <http://pythonpapers.cgpublisher.com/diary/11> To
those who have submitted content for The Python Papers, we salute you. To
the rest, we will be accepting zero-hour submissions up until the time of
publication. However, the closer the deadline gets, the less likely it is
that submissions will be processed in time. Submissions may be kept for the
next edition, however.

This edition will also be aimed to complement the upcoming PyCon 2007. As we
offer peer-review for academic publications, we hope to offer an opportunity
to participants who might regard this as an advantage.

We would still like to hear from anyone participating in any Python User's
Group to be a spokesperson. We will feature a series of articles covering
PUGs from around the world, and it would be fantastic to show people just
how diverse, wide-ranging and interesting the Python community really is.

Cheers,
-T
(Editor-In-Chief)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070108/2f0f0c6d/attachment.html>

From millball54 at yahoo.com  Sat Jan 27 08:37:07 2007
From: millball54 at yahoo.com (millball54 at yahoo.com)
Date: 27 Jan 2007 05:37:07 -0800
Subject: Hi, I'm new to python
Message-ID: <1169905027.776723.194140@a75g2000cwd.googlegroups.com>

Hey Everyone

Let me tell you all a little bit about my programming background so 
you can get an idea of my capability, or lack of, dealing with p.l;   
so far i've learned some visual basic when i was doing my a-levels.... 
and thats about it lol.

Basically i like the sound of python and its ease of use and would 
like to know in depth more about it and its range of useage.  Please 
do tell me all you know, keeping in mind i am a n00b, so do be 
gentle. :)

Thanks
Millball54



From fredrik at pythonware.com  Thu Jan  4 13:59:40 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 04 Jan 2007 19:59:40 +0100
Subject: Using External Libraries with python?
In-Reply-To: <459D2577.70503@mailshack.com>
References: <459D2577.70503@mailshack.com>
Message-ID: <enjiqr$pkt$2@sea.gmane.org>

Ognjen Bezanov wrote:

> I have some external C libraries I would like to use with python.
> 
> I have been searching on the internet and found many such
> modules/bindings for libraries (e.g. Py-Lame) but have not yet
> come across any information of how to actually go about creating such
> bindings, so I was wondering if anybody here could point me in the right
> direction?

in addition to the tools that have already been mentioned, the relevant 
FAQ articles also provide useful information:

http://effbot.org/pyfaq/extending-index.htm

</F>



From paddy3118 at netscape.net  Fri Jan  5 03:06:43 2007
From: paddy3118 at netscape.net (Paddy)
Date: 5 Jan 2007 00:06:43 -0800
Subject: C/C++, Perl, etc. to Python converter
In-Reply-To: <G3Qmh.94$9v1.124@nntpserver.swip.net>
References: <G3Qmh.94$9v1.124@nntpserver.swip.net>
Message-ID: <1167984402.943797.94940@q40g2000cwq.googlegroups.com>


mm wrote:

> Is there a Perl to Python converter?
> Or in general: a XY to Python converter?
>
> Is see, that Python is much better then Perl anyway.
> But for beginners, they whant to konw how is this done with Python etc.
>
> Sure, there are some docus out there in the internet. But a converter?
Try this page:
http://wiki.python.org/moin/PerlPhrasebook

- Paddy.



From bdesth.quelquechose at free.quelquepart.fr  Sun Jan  7 12:43:34 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 07 Jan 2007 18:43:34 +0100
Subject: [OT] (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <1168130960.670978.111850@s34g2000cwa.googlegroups.com>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
	<1168042215.514023.121560@s80g2000cwa.googlegroups.com>
	<1168048620.409190.85870@v33g2000cwv.googlegroups.com>
	<1168130960.670978.111850@s34g2000cwa.googlegroups.com>
Message-ID: <45a12b07$0$300$426a74cc@news.free.fr>

Martin Miller a ?crit :
(snip)
> 
> Oh, contrair. 

I guess you mean "au contraire" ?-)

(snip)


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan  8 12:31:21 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 08 Jan 2007 18:31:21 +0100
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk> <entj5d$o4$1@south.jnrs.ja.net>
	<entkru$2vs$1@gemini.csx.cam.ac.uk>
	<50f5snF1fb5uqU2@mid.individual.net>
	<entpo0$d0g$1@gemini.csx.cam.ac.uk>
Message-ID: <50fdf9F1fki7dU3@mid.individual.net>

Nick Maclaren wrote:

> The use of different precisions for the two cases is not, however,
> and it is that I was and am referring to.

You mistake "precision" with "display". 

Regards,


Bj?rn

-- 
BOFH excuse #12:

dry joints on cable plug



From istvan.albert at gmail.com  Thu Jan 11 09:06:46 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: 11 Jan 2007 06:06:46 -0800
Subject: Read from database, write to another database, simultaneously
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
	<50l9dlF1fuc1sU1@mid.individual.net> <9ihph.72$fo1.64@newsfe03.lga>
	<1168518426.111465.290430@o58g2000hsb.googlegroups.com>
Message-ID: <1168524406.571443.217190@p59g2000hsd.googlegroups.com>


Sean Davis wrote:

> at the same time that the data is coming in?  So, I am actually looking
> for a solution to this problem that doesn't require an intermediate
> file and allows simultaneous reading and writing, with the caveat that
> the data cannot all be read into memory simultaneously, so will need to
> be buffered.

IMO the problem that you need to solve is not well suited for the
python DBAPI as this API is meant to support programming and
interacting with the database not streaming large quantities from one
database into another.

I agree with another opinion in this thread.

All you need is a simple way to pipe the output from Oracle into
Postgresql. Just run the oracle client and start dumping to the
standard output. Pipe it through sed (or a python program) to reformat
the output for whatever minor fixes (you might not even need this step)
then continue piping it right into psql.

i.



From oyekomova at hotmail.com  Tue Jan  9 15:08:00 2007
From: oyekomova at hotmail.com (oyekomova)
Date: 9 Jan 2007 12:08:00 -0800
Subject: Newbie - converting csv files to arrays in NumPy
Message-ID: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>

I would like to know how to convert a csv file with a header row into a
floating point array without the header row.



From t.liesner at creativ-consulting.de  Mon Jan  8 11:59:35 2007
From: t.liesner at creativ-consulting.de (Thomas Liesner)
Date: Mon, 08 Jan 2007 16:59:35 GMT
Subject: xmlrpc an auth-diget
Message-ID: <XLuoh.216$TO.6992@se2-cb104-9.zrh1.ch.colt.net>

Hi all,

this may have been asked before, but as a newbie with xmlrpc i can't
find any suitable info on that. Sorry.
I am trying to write a simple xmlrpc-client in python and the server i
am trying to receive data from requires http auth digest.
The info on xmlrpclib covers auth basic thrugh url econding such as
"user:pass at server", but no auth digest.

Is there any other library i could use for that or can i write some sort
of wrapper around this using a differnt library like urllib?

TIA,
Tom


From bj_666 at gmx.net  Tue Jan  2 03:08:07 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 02 Jan 2007 09:08:07 +0100
Subject: how to move files based on file-ending from dirs and subdirs
	to	specific dir?
References: <mailman.2194.1167722106.32031.python-list@python.org>
Message-ID: <pan.2007.01.02.08.08.03.707994@gmx.net>

In <mailman.2194.1167722106.32031.python-list at python.org>, Evan Carmi
wrote:

> top = 'f:\\test\\mail'
> 
> [?]
>
> indexdest = []

Here you bind the name `indexdest` to an empty list but replace it in the
very next line with another list.  So this line is unnecessary.

> indexdest = ['%s\\..\\..\\%s\\%s\\%s' % (x , time.strftime('%Y%m%d%H%M%S'),
> os.path.basename(os.path.normpath(x+'\\..')), os.path.basename(x)) for x in ind
> ex]

This line is quite complicated and I don't really grasp what it's doing.
Maybe some comments, possible with examples, are needed here.  And maybe
then you'll see why it doesn't work as wanted!?  If these are the
destination paths and they should be at the same level as `top`, where is
`top` here?  Shouldn't that be a prefix of all destination paths?

Ciao,
	Marc 'BlackJack' Rintsch


From paul at boddie.org.uk  Thu Jan 25 07:07:22 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 25 Jan 2007 04:07:22 -0800
Subject: Python does not play well with others
In-Reply-To: <1169722875.237123.98680@v45g2000cwv.googlegroups.com>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
Message-ID: <1169726842.719104.304300@v45g2000cwv.googlegroups.com>

On 25 Jan, 12:01, "Ben Sizer" <kylo... at gmail.com> wrote:
>
> Python is quite capable in many areas, such that the people in the
> community with the expertise to extend the language and libraries, are
> usually the ones who've been happily using the polished features for
> years and have found they need nothing more. And the ones who need
> those features probably got bored of waiting for progress long ago. You
> get the responses you do from years of natural selection in the
> community. I think that is why many of the SIGs are stagnant, why the
> standard library has so much fluff yet still lacks in key areas such as
> multimedia and web development, etc.

I think this is also a good insight into why things are as they are
within the core development section of the community, although one can
wonder what some people actively developing the language are actually
doing with it if they are satisfied with the state of some of the
standard library solutions. However, there are lots of factors which
motivate people and the proliferation (or otherwise) of solutions to
common problems: whether one develops one's own solutions as separate
projects and/or tries to push for a consensus, whether one cares about
other people using such solutions, whether one aspires to contributing
to the standard library.

Over the years, people have tended towards building their own
communities around their projects rather than attempting to engage the
wider Python community, and I think a motivation behind that has been
the intractability of improving parts of the standard library. For
example, how would one update the cgi module? Since lots of code
including various Web frameworks makes use of the cgi module, it can't
just go away or have its APIs changed radically, but this doesn't
exactly make for a pretty "out of the box" solution for Web
programming. Someone else was complaining recently about URL handling
and the required combination of urllib, cgi and urlparse (or perhaps
some other combination, depending on what one's needs are). Presented
with the problem of rationalising all this, the chosen solution (as
adopted by the Web-SIG) is, as it is frequently, to ignore the problem
and to work on other things instead.

> People can say, "if you want it done, why aren't you doing it?", and is
> a fair question, but it doesn't alter the fact of Python's deficiencies
> in certain areas when compared with other languages.

True. It also doesn't address the issue of development priorities and
their role in defining the platform's own standards. We all know that
the Python language has issues (or "warts" as they are popularly
called), although some of the most notable ones don't seem to have been
addressed as yet in the plans for Python 3000 (eg. default argument
evaluation), but some of the most awkward aspects of using Python
involve libraries, not some deficiency of the language. However,
reforming the standard library is a topic which has arisen in all
seriousness only recently in the Python 3000 process (PEP 3108), and
the scope of the related activity is highly restricted - it's almost an
afterthought. Where the "why aren't you doing it?" part comes in
involves the observation that even if someone is motivated enough to
take something like this and to move forward in their own direction
[1], unless such initiatives are embraced by the core developers they
will remain peripheral, non-standard extensions that will at best only
become mainstream much later on.

I do wonder whether the interests of language/runtime project
developers eventually become completely aligned with the needs of such
projects, making things like "multimedia and web development" seem
irrelevant, uninteresting or tangential. This has worrying implications
for the perceived relevance of Python with regard to certain kinds of
solutions, despite the wealth of independently produced libraries
available for the language.

Paul

[1]
http://wiki.python.org/moin/CodingProjectIdeas/StandardLibrary/RestructuredStandardLibrary



From kirby.urner at gmail.com  Sat Jan 27 23:39:34 2007
From: kirby.urner at gmail.com (kirby.urner at gmail.com)
Date: 27 Jan 2007 20:39:34 -0800
Subject: More Python screencasts (Google videos)
Message-ID: <1169959174.477911.105890@k78g2000cwa.googlegroups.com>


Here're three sample 3-6 min videos showing off Python to math 
teachers
thinking about using a computer language instead of just calculators:

http://controlroom.blogspot.com/2007/01/python-for-math-teachers.html

Higher resolution versions are available to teachers enrolling in our 
program.

Kirby



From breroger at cisco.com  Tue Jan  2 12:45:34 2007
From: breroger at cisco.com (Brent Rogers -X (breroger - Spherion at Cisco))
Date: Tue, 2 Jan 2007 09:45:34 -0800
Subject: Python Guru needed in San Jose!
Message-ID: <239192DA61E5DE44A10CD25046A07EEC0359E5A1@xmb-sjc-213.amer.cisco.com>

Start the New Year off with a new Python job! 

Cisco Systems <http://www.cisco.com/>  (San Jose, CA)

Posted 16-Nov-2006

Technical Leader I (759661)

Description

We are looking for a Software Development Engineer who will work in
development of a new Cisco product. Architect and develop high
performance Linux embedded drivers and software. Product implements
networked services delivery including streaming and other real time
protocols. Candidate must have demonstrated deep understanding of Linux
OS and developed networking software on Linux. Work in a startup
environment inside a corporate company.

*	Proven track record of major contributions to successful
commercial Linux Real Time software development efforts. 
*	Strong Linux/Unix background (System Administration background
helpful) 
*	Ability to write scripts in some administrative language (TCL,
Perl, Python, a shell) 
*	A self starter able to work with a minimal supervision 
*	Uses acquired professional knowledge to determine method for
issue resolution. 
*	Uses expertise and creativity for innovative product
recommendation and solutions 

Typically requires BSEE/CS or equivalent with 10+ years relevant
experience in internetworking technologies and applications.

*	Contact: Brent Rogers, Recruiter 
*	Email: breroger at cisco.com 
*	Phone: 469-255-0254

 
 	
Brent Rogers
Recruiter
Talent Acquisition and Management

breroger at cisco.com
Phone :469-255-0254
Mobile :469-223-2085


Cisco Systems. Inc.
2200 E. President George Bush 
Richardson, TX, 75082
United States
www.cisco.com/jobs

 	
 	
This e-mail may contain confidential and privileged material for the
sole use of the intended recipient. Any review, use, distribution or
disclosure by others is strictly prohibited. If you are not the intended
recipient (or authorized to receive for the recipient), please contact
the sender by reply e-mail and delete all copies of this message.	
 


 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070102/79fbc52b/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: spacer.gif
Type: image/gif
Size: 55 bytes
Desc: spacer.gif
URL: <http://mail.python.org/pipermail/python-list/attachments/20070102/79fbc52b/attachment.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: footerHead.gif
Type: image/gif
Size: 68 bytes
Desc: footerHead.gif
URL: <http://mail.python.org/pipermail/python-list/attachments/20070102/79fbc52b/attachment-0001.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: footer.gif
Type: image/gif
Size: 347 bytes
Desc: footer.gif
URL: <http://mail.python.org/pipermail/python-list/attachments/20070102/79fbc52b/attachment-0002.gif>

From hg at nospam.org  Mon Jan 22 10:12:50 2007
From: hg at nospam.org (hg)
Date: Mon, 22 Jan 2007 16:12:50 +0100
Subject: beep or sound playing under linux
Message-ID: <pFath.50034$oA1.40310@newsfe19.lga>

Hi,

Is there a way to do that ?

Regards,

hg



From steven.bethard at gmail.com  Tue Jan 16 12:43:18 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 16 Jan 2007 10:43:18 -0700
Subject: A note on heapq module
In-Reply-To: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
Message-ID: <ALadnSBgXPQykzDYnZ2dnUVZ_oernZ2d@comcast.com>

bearophileHUGS at lycos.com wrote:
> some time ago I have written a bug
> into small program that uses the functions of the heapq module, because
> I have added an item to the head of the heap using a normal list
> method, breaking the heap invariant.

I know I've had similar bugs in my code before.

> from heapq import heapify, heappush, heappop, heapreplace
> 
> class Heap(object):
[snip implementation]

+1 for adding a Heap object like this to the collections module. If you 
can make a little time to add some tests (you could probably steal a lot 
of what you need from test_heapq.py) you should definitely submit it as 
a patch for 2.6.

STeVe


From Sardaukary at gmail.com  Fri Jan  5 15:39:08 2007
From: Sardaukary at gmail.com (Sardaukary at gmail.com)
Date: 5 Jan 2007 12:39:08 -0800
Subject: strange for loop construct
Message-ID: <1168029548.217679.251230@q40g2000cwq.googlegroups.com>

I was googling for an example of the classic word frequency program in
Python as I'm just learning the language, and wanted to see how other
people implemented it.

I found this blog post
http://digitalhistory.uwo.ca/dhh/index.php/2006/08/20/easy-pieces-in-python-word-frequencies/
(with a much more concise version than I managed) but I can't seem to
find any mention in various Python documentation of the following
construct

wordfreq = [wordlist.count(p) for p in wordlist]

I would expect

for p in wordlist:
    wordfreq.append(wordlist.count(p))


I didn't know you could have an expression in the same line.



From nono at hotmail.com  Tue Jan  2 08:34:54 2007
From: nono at hotmail.com (Osiris)
Date: Tue, 02 Jan 2007 14:34:54 +0100
Subject: How to get BOOST working on XP and Visual C++ 2005
Message-ID: <25nkp259o92ed0njqe7k03abohokdfepnh@4ax.com>

My experiences with BOOST on Windows XP and Visual C++ 2005

I'm new to Python.
I built software in more than ten other computer languages. I'm not
sure if that is not a handicap, when reading documentation of a system
like BOOST.
However:
It took me more than four full working days to get a Python/C/C++
'hello world!' program to work. There is a lot of documentation, but
somehow it did not 'click' with my previous experience. I think the
doc was written by very, very capable C++ and Python programmers, who
forgot how the world was before they got involved with Python.
A teacher/doc writer should never forget that, I think.
Mind you: the documentation is all there. Stressing the word ALL.
There is a lot of documentation. Which makes it very difficult to
choose the right piece.

My project is, to use old and tested and stable and error-free C-code
in a website built with Zope (www.zope.org) and Plone (www.plone.org).
So I think, C-code can be wrapped in some C++ and then, with the help
of Boost, be called from Python. Python is important when using Plone.

So let me summarize what I found out.

BOOST is a system to combine Python and C++. Call C++ compiled code
from Python, which is interpreted.
In the end, BOOST is a sort of "make" facility like found on Linux
(and Windows). In Boost it is called, not 'make.exe', but 'bjam.exe'.
You define a list of operations, which bjam executes for you. It runs
from the command line (I grew up, IT-wise, in the DOS-era. Hurray), it
has no GUI-like Windows front-end.

So the first step is to get bjam.exe from the net. There are two ways
to get it:
1.	download a ready-to-run bjam.exe from
http://downloads.sourceforge.net/boost/boost-jam-3.1.13-1-ntx86.zip?modtime=1149717367&big_mirror=0.
In the zip you will find the bjam.exe, which you put it in a place
where the system can always find it, like in c:\, or somewhere else in
the system's PATH.
2.	download the sources for bjam.exe and build it yourself:
http://downloads.sourceforge.net/boost/boost-jam-3.1.13.zip?modtime=1149717465&big_mirror=0
. I recommend not to do this, if you don't have to. And on Windows XP,
you don't have to. You could spend a lot of time to figure out how to
set up things before even building bjam.exe.

The second step is to get Boost libraries. These are for combining
with your C/C++ source, so Python can access the C/C++ code.
You download this stuff from Sourceforge:
http://downloads.sourceforge.net/boost/boost_1_33_1.zip?modtime=1133816391&big_mirror=0
It is a zip file that you unzip to a convenient location. I unzipped
to D:\ so I got a folder named d:\boost_1_31_1 with all the stuff in
it. I renamed this folder to d:\boost, to get rid of all the messy
version numbers.
To build the boost libraries from these sources, you need bjam, and
bjam makes use of your C/C++ compiler. In my case that was Microsoft
Visual C++ 2005, which has version number 8.0.
Now you have to make bjam and Visual C++ acquainted with the location
of supporting software. I made a BAT file to do this. This is what is
in that .BAT file, named SET.BAT and which I put in D:\boost:

d:
cd \boost
call e:\msvc\vc\vcvarsall.bat
set VC80_ROOT=e:\msvc\vc
set TOOLS=vc-8_0
set PYTHON_ROOT=c:\python24
set PYTHON_VERSION=2.4

I explain: 
e:\msvc is where I installed my Visual C++ system. The Microsoft
default location would be something like C:\Microsoft Visual C 2005\
etc, but I preferred D:\msvc.
Change the SET.BAT file as needed .
My IDLE (http://www.python.org/idle/) Python 2.4 is in C:\python24
The value 'vc-8_0' denotes the boost identification of my MS Visual
C++ system. If you use an other C++ system, it must be something else
(see http://www.boost.org/more/getting_started.html)

Now start a DOS box: Click the Start button in the lower left corner,
click on "run" and type "cmd".
There you switch to D:\ and change directory to \BOOST.
Execute the SET.BAT.
Then just type "bjam" (the system will find the program bjam itself,
because it is in the PATH)

Now get a lot of coffee, because the build will take a LONG time,
maybe 15 minutes or more.
You will see a lot of cpp-compiling and linking going on and some
warnings about 'deprecation', which are irrelevant.

When finished, keep the DOS box open. You will find BOOST stuff in
C:\boost, the default location for the compiling results.

Now try out an example. In the DOS box, go to
D:\boost\libs\python\example\tutorial, where you find a 'hello'
example and a Jamfile. Jamfile's are what a makefile is for make.: a
script for bjam to build all the 'hello' stuff needed for python.

Type 'bjam' again, and take a smaller amount of coffee. The system
will build the 'hello' stuff for you. Do not be alarmed about bjam
finding 1200+ 'targets' and rebuilding 40 of them, when only needing
to compile hello.cpp
. this is normal behaviour.

When bjam has finished, you will find 'hello' stuff in the
unbelievably deep folder
D:\boost\libs\python\example\tutorial\bin\tutorial\hello.pyd\vc-8_0\debug\threading-multi
Really. I don't know why this must be so deep.
And some Boost stuff in the even more deep folder
D:\boost\libs\python\example\tutorial\bin\boost\libs\python\build\boost_python.dll\vc-8_0\debug\threading-multi

Find the hello.pyd and boost_python.dll and move them to the folder
where yout python.exe is, in my case c:\python24.

Now you go to
file:///D:/boost/libs/python/doc/tutorial/doc/html/python/hello.html
which is part of the Boost download. and read the page.
That should get you on your way.
Of course, now it might be beneficial to you to start reading the
other documentation on 
http://www.boost.org/more/getting_started.html




From Eric_Dexter at msn.com  Fri Jan 19 06:51:08 2007
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 19 Jan 2007 03:51:08 -0800
Subject: when format strings attack
Message-ID: <1169207467.989977.162940@q2g2000cwa.googlegroups.com>

http://www.ddj.com/184405774;jsessionid=BDDEMUGJOPXUMQSNDLQCKHSCJUNN2JVN

I saw a warning from homeland security about this.  I only comment on
the because I am trying to use os.system('command1 arg') and it doesn't
work but I do see examples with % that is borrowed from the c language.
 Seems like if I can write a batch file that does something the same
behavior should happen in the os module..



From dickinsm at gmail.com  Tue Jan 16 10:52:56 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: 16 Jan 2007 07:52:56 -0800
Subject: Conflicting needs for __init__ method
In-Reply-To: <1168961105.446604.259840@l53g2000cwa.googlegroups.com>
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<mailman.2741.1168898073.32031.python-list@python.org>
	<1168961105.446604.259840@l53g2000cwa.googlegroups.com>
Message-ID: <1168962776.221753.263670@v45g2000cwv.googlegroups.com>

On Jan 16, 10:25 am, "Mark Dickinson" <dicki... at gmail.com> wrote:

> that is, I was working from the following two assumptions:
>
> (1) *Every* time a Rational is created, __init__ must eventually be
> called, and
> (2) The user of the class expects to call Rational() to create
> rationals.

(with apologies for replying to myself)

I'm still not being careful.  The assumptions should be these:

(1) Any creation of a Rational instance must eventually go through
Rational().
(2) A call to Rational() eventually results in a call to __init__.
(3) The user of the class expects to call Rational() to create
rationals.

There you are:  three flawed assumptions for the price of two! (1)
fails because __new__ provides an alternative, (2) could easily become
untrue by changing the metaclass, and (3)---well, who knows what the
user expects?

Right.  Now that I've thoroughly analyzed my own stupidity, things are
much clearer.  Thank you to all who replied.

Mark



From sjmachin at lexicon.net  Mon Jan  1 03:14:40 2007
From: sjmachin at lexicon.net (John Machin)
Date: 1 Jan 2007 00:14:40 -0800
Subject: OO question
References: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
Message-ID: <1167639280.181587.242490@s34g2000cwa.googlegroups.com>

fejkadress at hushmail.com wrote:
> I want to make an addressbook and I'm new to OO programming, so I
> wonder if this sounds reasonable.
>
> I think of making a class Address which contains all data about one
> person, that class can have UserDict as baseclass so I can access data
> like object['name'], etc..

Stop right there. Class Address contains all data about one *person*?
Please consider renaming that class Person, and having a separate class
Address.

Interruption for a reality check:  A person may be related to zero, one
or many addresses. An address may be related to zero, one or many
persons. The relationship may take many forms e.g. "lives at", "once
lived at", "has been noticed loitering outside", ...

OK, now you can resume your normal programming ;-)

BTW, why object['name'] and not object.name?

Cheers,
John



From jzgoda at o2.usun.pl  Mon Jan 22 14:39:28 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Mon, 22 Jan 2007 20:39:28 +0100
Subject: Python Windows Editors
In-Reply-To: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
Message-ID: <ep33ul$6cr$1@atlantis.news.tpi.pl>

W. Watson napisa?(a):

> I downloaded python-2.5.msi and installed it. I believe its editor is
> IDE. I understand there's a Win editor called pythonwin. I believe it's
> in the download pywin32-210.win32-py2.5.exe, but I'm not sure if this
> exe file has just the editor or all of Python. Comments? If not how do I
> get the PythonWin editor by itself?

No, there's no "single official Python editor or IDE". You can edit
Python code in any editor you want. When I was on Windows, I used to use
jEdit (http://www.jedit.org/) or Vim (http://www.vim.org/), but others
will give you other advices. Any text editor is only as good as the
programmer who uses it. ;)

-- 
Jarek Zgoda
http://jpa.berlios.de/


From martin at v.loewis.de  Mon Jan 22 16:48:46 2007
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 22 Jan 2007 22:48:46 +0100
Subject: Building extensions with vc8
In-Reply-To: <Xns98C08781BD9E5howardeegsoftwarecom@207.115.17.102>
References: <Xns98C08781BD9E5howardeegsoftwarecom@207.115.17.102>
Message-ID: <45B5313E.8050308@v.loewis.de>

Howard Lightstone schrieb:
> Has there been any progress on being able to build extensions with MSVC8 
> (aka Visual Studio 2005)?

No. No progress will happen throughout the release of Python 2.5.
To get the facts straight: it *might* be possible to build an extension
with msvc8 (thus linking with msvcr8.dll); this should work as long
as the extension doesn't use any API that is forbidden for the mixed-CRT
case. Only a source inspection of the extension module can tell whether
there is any risky code.

> Since the "free" compiler from Microsoft is now VC8, I *assume* this will 
> be the new method.....

Your assumption is wrong; this isn't officially supported.

> 2.5 itself rebuilds using PCbuild8, as do tkinter (but using Tcl 8.4.14 and 
> Tk 8.4.14) however  none of the distutils-generated extensions will build.

If you built Python 2.5 yourself with VS 2005, you should be able to
build extension modules as well with distutils, by setting MSSdk and
DISTUTILS_USE_SDK appropriately.

Regards,
Martin


From __peter__ at web.de  Mon Jan  8 07:55:40 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 08 Jan 2007 13:55:40 +0100
Subject: how to find the longst element list of lists
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
	<m2mz4ul1tk.fsf@unique.fqdn>
	<pan.2007.01.08.10.29.29.887201@REMOVE.THIS.cybersource.com.au>
Message-ID: <entf0l$fmo$00$1@news.t-online.com>

Steven D'Aprano wrote:

> On Sun, 07 Jan 2007 20:55:19 -0500, Dan Sommers wrote:
> 
>> On Sun, 07 Jan 2007 22:23:22 +0100,
>> "Michael M." <michael at mustun.ch> wrote:
>> 
>>> How to find the longst element list of lists?
>>> I think, there should be an easier way then this:
>> 
>>>   s1 = ["q", "e", "d"]
>>>   s2 = ["a", "b"]
>>>   s3 = ["a", "b", "c", "d"]
>> 
>> [ snip ]
>> 
>> One more thing to think about:  if your list of lists grows (i.e., if
>> you end up with thousands of lists instead of just three), then sorting
>> may not be the way to go.  Assuming that list_of_lists is your list of
>> lists, then something like this:
>> 
>>     longest_list, longest_length = list_of_lists[ 0 ], len( longest_list
>>     ) for a_list in list_of_lists[ 1 : ]:
>>         a_length = len( a_list )
>>         if a_length > longest_length:
>>             longest_list, longest_length = a_list, a_length
>> 
>> will run faster than sorting the list just to pick off one element (O(n)
>> vs. O(n log n) for all of you Big-Oh notation fans out there; you know
>> who you are!).
> 
> But your O(n) code is running in relatively slow Python, while the sort
> method, while O(n log n), is some of the fastest, most highly optimized C
> code out there. Unless your list is truly gigantic, chances are the sort
> version will win.
> 
> Here's my timing code:
> 
> 
> import timeit
> 
> def getlongest1(list_of_lists):
>     longest_list = list_of_lists[ 0 ]
>     longest_length = len( longest_list )
>     for a_list in list_of_lists[ 1 : ]:
>         a_length = len( a_list )
>         if a_length > longest_length:
>             longest_list, longest_length = a_list, a_length
>     return longest_list
> 
> def getlongest2(list_of_lists):
>     list_of_lists.sort(key=len)
>     return list_of_lists[0]
> 
> def make_list_of_lists(length):
>     return [[None]*i for i in xrange(length)]
> 
> t1 = timeit.Timer("getlongest1(L)", "from __main__ import getlongest1, L")
> t2 = timeit.Timer("getlongest2(L)", "from __main__ import getlongest2, L")
> 
> 
> 
> Note that my test list_of_lists grows very big quite fast, like O(n**2).
> Assuming Python pointers are eight bytes, a mere length=10000 will
> require over 760MB just for the pointers. More realistic data may allow
> more extensive testing.
> 
> And here are my timing results:
> 
>>>> L = make_list_of_lists(1)
>>>> print t1.timeit(1000), t2.timeit(1000)
> 0.00209903717041 0.00367403030396
> 
>>>> L = make_list_of_lists(10)
>>>> print t1.timeit(1000), t2.timeit(1000)
> 0.00871086120605 0.00775289535522
> 
>>>> L = make_list_of_lists(100)
>>>> print t1.timeit(1000), t2.timeit(1000)
> 0.121382951736 0.0518100261688
> 
>>>> L = make_list_of_lists(1000)
>>>> print t1.timeit(1000), t2.timeit(1000)
> 0.809508085251 0.508343935013
> 
>>>> L = make_list_of_lists(10000)
>>>> print t1.timeit(100), t2.timeit(100)
> 0.906499147415 0.732254981995
> 
>>>> L = make_list_of_lists(20000)
>>>> print t1.timeit(100), t2.timeit(100)
> 1.83560800552 1.58732700348
> 
> For a list of 1 item, sorting is 1.8 times SLOWER;
> For a list of 10 items, sorting is 1.1 times FASTER;
> For 100 items, sorting is 2.3 times faster;
> For 1000 items, sorting is 1.6 times faster;
> For 10,000 items, sorting is 1.2 times faster;
> For 20,000 items, sorting is 1.1 times faster.
> 
> 
> The precise results depend on the version of Python you're running, the
> amount of memory you have, other processes running, and the details of
> what's in the list you are trying to sort. But as my test shows, sort has
> some overhead that makes it a trivial amount slower for sufficiently small
> lists, but for everything else you're highly unlikely to beat it.

Try again with tN.timeit(1) and a second list that is random.shuffle()d and
copied to L before each measurement. list.sort() treats already sorted
lists specially.

Peter



From t.liesner at creativ-consulting.de  Mon Jan  8 12:08:42 2007
From: t.liesner at creativ-consulting.de (Thomas Liesner)
Date: Mon, 08 Jan 2007 17:08:42 GMT
Subject: xmlrpc and auth-digest
Message-ID: <uUuoh.217$TO.6980@se2-cb104-9.zrh1.ch.colt.net>

Hi all,

this may have been asked before, but as a newbie with xmlrpc i can't
find any suitable info on that. Sorry.
I am trying to write a simple xmlrpc-client in python and the server i
am trying to receive data from requires http auth digest.
The info on xmlrpclib covers auth basic thrugh url econding such as
"user:pass at server", but no auth digest.

Is there any other library i could use for that or can i write some sort
of wrapper around this using a differnt library like urllib?

TIA,
Tom


From cfbolz at gmx.de  Mon Jan 22 06:05:07 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Mon, 22 Jan 2007 12:05:07 +0100
Subject: Py 2.5 on Language Shootout
In-Reply-To: <624934630701211513t3a3e28a5ua7387c9ee2f5790e@mail.gmail.com>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>	<1169275613.093797.67320@v45g2000cwv.googlegroups.com>	<45B23400.2010906@gmx.de>	<mailman.2944.1169309208.32031.python-list@python.org>	<1169321686.025356.120340@s34g2000cwa.googlegroups.com>	<mailman.2951.1169329048.32031.python-list@python.org>	<1169331552.918850.282920@a75g2000cwd.googlegroups.com>
	<624934630701211513t3a3e28a5ua7387c9ee2f5790e@mail.gmail.com>
Message-ID: <45B49A63.9000601@gmx.de>

Ramon Diaz-Uriarte wrote:
 >> In England the corresponding expression is "Counting Angels on a
 >> Pinhead"
 >> http://dannyayers.com/2001/misc/angels.htm
 >>
 >
 > Thanks, that is neat. I find the discussion on the sex of the angels,
 > well, sexier. But we are probably a few hundred years late to start a
 > catholic-protestant religious war here :-).
 >
NOBODY expects the Spanish Inquisition! Our chief weapon is
surprise...surprise and fear...fear and surprise.



From maxerickson at gmail.com  Tue Jan 16 23:37:11 2007
From: maxerickson at gmail.com (Max Erickson)
Date: Wed, 17 Jan 2007 04:37:11 +0000 (UTC)
Subject: urllib2 and HTTPBasicAuthHandler
References: <45acf775$0$5070$ba4acef3@news.orange.fr>
	<mailman.2789.1168970662.32031.python-list@python.org>
	<45ad6309$1$27408$ba4acef3@news.orange.fr>
Message-ID: <Xns98BAF044A7527maxericksongmailcom@80.91.229.5>

"m.banaouas" <banaouas.medialog at wanadoo.fr> wrote:

...
>    passman.add_password(None, auth_url, data['user'] ,
...


The only thing I can come up with is that auth_url can't begin with a 
protocol, like http:// or whatever. 


max



From cvanarsdall at mvista.com  Wed Jan 31 20:19:07 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 31 Jan 2007 17:19:07 -0800
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <20070201011029.25807.1696981903.divmod.quotient.5293@ohm>
References: <20070201011029.25807.1696981903.divmod.quotient.5293@ohm>
Message-ID: <45C1400B.2000204@mvista.com>

Jean-Paul Calderone wrote:
> On Wed, 31 Jan 2007 15:13:59 -0800, "Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote:
>   
>> Jean-Paul Calderone wrote:
>>     
>>> [snip]
>>>       
>>>>         
>>> You're right.  Learning new things is bad.  My mistake.
>>>
>>> Jean-Paul
>>>
>>>       
>> That isn't what I said at all.  You have to look at it from a
>> cost/benefit relationship.  Its a waste of time/money to learn something
>> complex to do something simple.  For the simple things, use a simple
>> solution.  KISS.  When he has an application that would require
>> something more complex, it would be at that point he should consider
>> using it for a project.  Unless the OP has a desire to learn this
>> technology, then more power to him.  I, however, do not believe that
>> would be the best approach for a simple problem.
>>
>> Knowing the appropriate tool for the job is a trait of an good engineer.
>>
>>     
>
> You are assuming that he already knows how to use threads, and so there
> is no investment required for a threaded solution.  In my experience, it's
> much safer to assume the opposite.  _Even_ (often _especially_ when a
> threaded solution is explicitly requested.
>   
I have a bit more confidence in python threads, but that takes us back 
to the age old debate on this list.  So we agree to disagree.

-c

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From jstroud at mbi.ucla.edu  Mon Jan 22 01:01:01 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 21 Jan 2007 22:01:01 -0800
Subject: Is any python like linux shell?
In-Reply-To: <1169437900.726137.237650@51g2000cwl.googlegroups.com>
References: <1169398326.510530.180860@51g2000cwl.googlegroups.com>
	<1169400157.075307.31340@l53g2000cwa.googlegroups.com>
	<1169437900.726137.237650@51g2000cwl.googlegroups.com>
Message-ID: <ep1jut$sla$2@daisy.noc.ucla.edu>

Paddy wrote:
> George Sakkis wrote:
> 
> 
>>Frank Potter wrote:
>>
>>
>>>I learned some python in windows.
>>>And now I've turned to linux.
>>>I read a book and it teaches how to write shell script with bash,
>>>but I don't feel like the grammar of bash.
>>>Since I know about python,
>>>I want to get a linux shell which use python grammar.
>>>I searched by google and I found pysh, which is not maintained any
>>>more.
>>>There's another script named pyshell, which is not likely what I'm
>>>searching for.
>>>So, will somebody please tell me if there are any python like shells
>>>for linux?
>>
>>IPython is actually more than a simple shell. Give it a try:
>>http://ipython.scipy.org/.
>>
>>George
> 
> 
> Frank,
> IPython is great, but it is not a replacement for a shell like bash. If
> you have a Linux system then you still need to know the rudiments of
> bash 

Or better yet, csh. ;)

James





From sschwarzer at sschwarzer.net  Fri Jan 26 18:03:28 2007
From: sschwarzer at sschwarzer.net (Stefan Schwarzer)
Date: Sat, 27 Jan 2007 00:03:28 +0100
Subject: [ANN] ftputil 2.2.1
Message-ID: <mailman.3231.1169916877.32031.python-announce-list@python.org>

ftputil 2.2.1 is now available from
http://ftputil.sschwarzer.net/download .

Changes since version 2.2
-------------------------

This bugfix release checks and ignores status code 451 when FTPFiles
are closed (thanks go to Alexander Holyapin). Upgrading is recommended.

What is ftputil?
----------------

ftputil is a high-level FTP client library for the Python programming
language. ftputil implements a virtual file system for accessing FTP
servers, that is, it can generate file-like objects for remote files.
The library supports many functions similar to those in the os,
os.path and shutil modules. ftputil has convenience functions for
conditional uploads and downloads, and handles FTP clients and servers
in different timezones.

Read the documentation at
http://ftputil.sschwarzer.net/trac/wiki/Documentation .

License
-------

ftputil is Open Source software, released under the revised BSD
license (see http://www.opensource.org/licenses/bsd-license.php ).

Stefan

-- 
Dr.-Ing. Stefan Schwarzer
SSchwarzer.com - Softwareentwicklung f?r Technik und Wissenschaft
http://sschwarzer.com
http://ftputil.sschwarzer.net


From jhefferon at smcvt.edu  Wed Jan 31 11:01:52 2007
From: jhefferon at smcvt.edu (Jim)
Date: 31 Jan 2007 08:01:52 -0800
Subject: error messages containing unicode
In-Reply-To: <1170248238.032665.207180@m58g2000cwm.googlegroups.com>
References: <1170122515.980168.150960@p10g2000cwp.googlegroups.com>
	<pan.2007.01.30.02.48.10.853852@REMOVEME.cybersource.com.au>
	<1170160464.576122.62230@h3g2000cwc.googlegroups.com>
	<pan.2007.01.31.06.39.55.881990@REMOVEME.cybersource.com.au>
	<1170248238.032665.207180@m58g2000cwm.googlegroups.com>
Message-ID: <1170259312.899040.55250@p10g2000cwp.googlegroups.com>

Oops, there is a typo in what I wrote above.  Sorry.

On Jan 31, 7:57 am, "Jim" <jheffe... at smcvt.edu> wrote:
> Oh, I agree.  If I have a string mesg that is unicode-not-ascii and I
> say
>   try:
>       raise Exception mesg
>   except Exception, err:
>       print "Trouble"+mesg
> then I have problems.
should say:
   try:
       raise Exception mesg
   except Exception, err:
       print "Trouble"+str(err)

Jim



From horpner at yahoo.com  Tue Jan  9 08:16:18 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 9 Jan 2007 14:16:18 +0100
Subject: Colons, indentation and reformatting.
References: <1168323145.393149.299540@v33g2000cwv.googlegroups.com>
	<45a36074$0$15146$4d3efbfe@news.sover.net>
Message-ID: <slrneq75ge.1nc.horpner@FIAD06.norwich.edu>

On 2007-01-09, Leif K-Brooks <eurleif at ecritters.biz> wrote:
> Paddy wrote:
>> Thinking about it a little, it seems that a colon followed by
>> non-indented code that has just been pasted in could also be
>> used by a Python-aware editor as a flag to re-indent the
>> pasted code.
>
> How would it reindent this code?
>
> if foo:
> print "Foo!"
> if bar:
> print "Bar!"
>
> Like this?
>
> if foo:
>      print "Foo!"
> if bar:
>      print "Bar!"
>
> Or like this?
>
> if foo:
>      print "Foo!"
>      if bar:
>          print "Bar!"

That's the key issue. The colon gives the editor an easy clue
where a block starts, but the there's no simply way to determine
where the block is supposed to end.

-- 
Neil Cerutti
Remember in prayer the many who are sick of our church and community. --Church
Bulletin Blooper


From gagsl-py at yahoo.com.ar  Thu Jan 25 19:54:49 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 25 Jan 2007 21:54:49 -0300
Subject: Module for SVG?
In-Reply-To: <1169754412.101443.280390@h3g2000cwc.googlegroups.com>
References: <mailman.3164.1169751502.32031.python-list@python.org>
	<1169754412.101443.280390@h3g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20070125215150.047bfd20@yahoo.com.ar>

At Thursday 25/1/2007 16:46, Boris.Boutillier at gmail.com wrote:

>Depending on the size of your project, the xist library from living
>logic is supporting svg xml:
>http://www.livinglogic.de/Python/xist/
>http://www.livinglogic.de/Python/xist/ns/svg/
>
>We've used it successfully, but later on came back to simply use the
>standard dom creation tools in python to reduce dependencies.

I ended using a similar approach. You only need a few functions to 
generate those long string attribute values, the remaining is standard XML.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From steven.bethard at gmail.com  Tue Jan  9 13:39:59 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 09 Jan 2007 11:39:59 -0700
Subject: Question about using "with"
In-Reply-To: <mailman.2487.1168367035.32031.python-list@python.org>
References: <mailman.2487.1168367035.32031.python-list@python.org>
Message-ID: <nqednbAMHvnqfD7YnZ2dnUVZ_szinZ2d@comcast.com>

Steven W. Orr wrote:
>> From the tutorial, they said that the following construct will 
> automatically close a previously open file descriptor:
> 
> -------------------
> #! /usr/bin/python
> import sys
> 
> for nn in range ( 1, len(sys.argv ) ):
>     print "arg ", nn, "value = ", sys.argv[nn]
>     with open(sys.argv[nn]) as f:
>         for line in f:
>             print line,
> ------------------
> 
> but when I run it (with args) I get:
> 
> 591 > ./cat.py cat.py
>   File "./cat.py", line 6
>     with open(sys.argv[nn]) as f:
>             ^
> SyntaxError: invalid syntax
> 592 >
> 
> This example came from http://docs.python.org/tut/node10.html down in 
> section 8.7
> 
> Am I missing something?

You need to enable the with statement using a __future__ import::

 >>> with open('temp.txt', 'w') as f:
<stdin>:1: Warning: 'with' will become a reserved keyword in Python 2.6
   File "<stdin>", line 1
     with open('temp.txt', 'w') as f:
             ^
SyntaxError: invalid syntax
 >>> from __future__ import with_statement
 >>> with open('temp.txt', 'w') as f:
...     f.write('hello')
...

STeVe


From dejan.wirusrodiger at ck.t-com.hr  Tue Jan 16 03:08:32 2007
From: dejan.wirusrodiger at ck.t-com.hr (Dejan Rodiger)
Date: Tue, 16 Jan 2007 09:08:32 +0100
Subject: Python Threads and C Semaphores
In-Reply-To: <eohuov$js1$1@nobel.pacific.net.sg>
References: <eohuov$js1$1@nobel.pacific.net.sg>
Message-ID: <eoi163$hnc$1@ss408.t-com.hr>

Jeremy said the following on 16.1.2007 8:27:
> Hello,
> 
> I have a fat C++ extension to a Python 2.3.4 program. In all, I count
> five threads. Of these, two are started in Python using
> thread.start_new_thread(), and both of these wait on semaphores in the C++
> extension using sem_wait(). There also are two other Python threads and one 
> thread running wholly in
> the extension.
> 
> I notice that when one of the Python threads calls the extension and waits
> on a semaphore, all but the C++ thread halt even when not waiting on any
> semaphore. How do we get this working right?

Check the Global Interpreter Lock

-- 
Dejan Rodiger - PGP ID 0xAC8722DC
Delete wirus from e-mail address


From bignose+hates-spam at benfinney.id.au  Wed Jan 31 04:15:44 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 31 Jan 2007 20:15:44 +1100
Subject: parent-child object design question
References: <1170136965.015119.225920@q2g2000cwa.googlegroups.com>
	<mailman.3297.1170139632.32031.python-list@python.org>
	<1170220553.843010.258260@a34g2000cwb.googlegroups.com>
	<pan.2007.01.31.07.24.21.793319@REMOVEME.cybersource.com.au>
Message-ID: <87odofv9of.fsf@benfinney.id.au>

"Steven D'Aprano" <steve at REMOVEME.cybersource.com.au> writes:

> >         def _accumulate_properties(self, properties):
> >             self.properties = []
>
> Probably better to put that in the __init__ method, otherwise if
> somebody runs instance._accumulate_properties(...) again, it will
> have the side-effect of throwing away whatever was already in
> instance.properties.

That's the point of naming it with a leading underscore. You've
already explained that this is convention for "Private, don't use".

> Some people might argue that if someone runs a private method like
> _accumulate_properties, they deserve whatever bad things happen to
> them.  But I say, well, sure, but why *design* your method to break
> things when called twice?

Exactly the same could be said for calling the __init__ method twice.

> Who knows, maybe you'll decide you want to call it twice yourself.

Right. In which case, it's good that it's already in a separate,
clearly-named, single-purpose method.

Make the code easy to understand, not idiot-proof.

-- 
 \          "One time a cop pulled me over for running a stop sign. He |
  `\        said, 'Didn't you see the stop sign?' I said, 'Yeah, but I |
_o__)             don't believe everything I read.'"  -- Steven Wright |
Ben Finney



From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 13 01:52:03 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 13 Jan 2007 17:52:03 +1100
Subject: Boilerplate in rich comparison methods
Message-ID: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>

I'm writing a class that implements rich comparisons, and I find myself
writing a lot of very similar code. If the calculation is short and
simple, I do something like this:


class Parrot:
    def __eq__(self, other):
        return self.plumage() == other.plumage()
    def __ne__(self, other):
        return self.plumage() != other.plumage()
    def __lt__(self, other):
        return self.plumage() < other.plumage()
    def __gt__(self, other):
        return self.plumage() > other.plumage()
    def __le__(self, other):
        return self.plumage() <= other.plumage()
    def __ge__(self, other):
        return self.plumage() >= other.plumage()

If the comparison requires a lot of work, I'll do something like this:

class Aardvark:
    def __le__(self, other):
        return lots_of_work(self, other)
    def __gt__(self, other):
        return not self <= other
    # etc.

But I can't help feeling that there is a better way. What do others do?



-- 
Steven.



From tim at tdw.net  Wed Jan 24 05:56:28 2007
From: tim at tdw.net (Tim Williams)
Date: Wed, 24 Jan 2007 10:56:28 +0000
Subject: smtplib starttls gmail example - comments?
In-Reply-To: <W63698683.410.134.1@mxextra>
References: <W63698683.410.134.1@mxextra>
Message-ID: <9afea2ac0701240256kae247b3s666be6529362c84e@mail.gmail.com>

On 24/01/07, py <py at th.on> wrote:
> I would love for anybody to comment on this code with regard to redundancy/efficiency/wordiness or whatever else.
> for instance, do i understand correctly that i cant have a try: else: without an intervening except:?
> -dave
>
>         stdout.write("calling smtp server...")
>         try:
>             server = SMTP(msgsmtp)
>         except:
>             stdout.write("FAIL.")   #using .write to avoid the implied \n with print
>         else:
>             server.set_debuglevel(msgdebug)
>             stdout.write("starting tls...")
>             server.ehlo(msgfrom)
>             try:    server.starttls()
>             except: stdout.write("FAIL.")
>             else:
>                 server.ehlo(msgfrom)           #neessary duplication (?)
>                 stdout.write("logging in...")
>                 try:    server.login(msgfrom, msgpass)
>                 except: stdout.write("FAIL.")
>                 else:
>                     stdout.write("sending...")
>                     try:    server.sendmail(msgfrom, msgto, msgtxt + "\n.\n")
>                     except: stdout.write("FAIL.")
>                     else:
>                         try:
>                             server.quit()
>                         except sslerror:      # a known and largely ignored issue with early EOF in ssl protocol
>                             stdout.write("success.")
>                         else:
>                             stdout.write("success.")
> --


*** Not tested  but should have the same functionality and error
handling as your script ***

this_host = 'myhostname.mydom1.com'
print "calling smtp server...", #  the trailing comma removes '\n'
try:
    server = smtplib.SMTP(msgsmtp,local_hostname=this_host)
    server.set_debuglevel(msgdebug)
    print "starting tls...",
    server.starttls()
    server.ehlo(this_host)  # RFC requirement for 2nd EHLO after requesting TLS
    print "logging in...",
    server.login(msgfrom, msgpass)
    print "sending...",
    failed = server.sendmail(msgfrom, msgto, msgtxt + "\n.\n")
    try:
        server.quit()
    except: pass
    print "success."
except:
    print "FAIL.",

if failed:
    print "failed:", failed  # some recipients, but not all of them, failed


From paddy3118 at netscape.net  Mon Jan  1 00:57:47 2007
From: paddy3118 at netscape.net (Paddy)
Date: 31 Dec 2006 21:57:47 -0800
Subject: OO question
In-Reply-To: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
References: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
Message-ID: <1167631067.933776.146240@n51g2000cwc.googlegroups.com>


fejkadress at hushmail.com wrote:

> I want to make an addressbook and I'm new to OO programming, so I
> wonder if this sounds reasonable.
>
> I think of making a class Address which contains all data about one
> person, that class can have UserDict as baseclass so I can access data
In Python 2.4 or 2.5 you can subclass dict.

> like object['name'], etc..
> Then maybe I can have a class AddressBook which has a list that
> contains all those Address objects.
> Does that sound reasonable?
Yep.

class AdressBook(list):
  def save(self, filename):
    import pickle
    ...


> And then the real reason that I posted here is:
> If I want to save all addresses to disk, I can have a method, say,
> save() of AddressBook. But then what? What is a good object oriented
> approach? Should each Address object take care of saving itself to the
> file, with a method like writetofile(filename), or should the class
> AddressBook take care of the saving and ask each object for its data?
If you use the pickle module on the Addressbook then it will
automatically
save each Address instance.

- Paddy.



From deets at nospam.web.de  Mon Jan 15 04:05:39 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 15 Jan 2007 10:05:39 +0100
Subject: python and MOV or MPEG
References: <eoffha$epe2$1@zam602.zam.kfa-juelich.de>
Message-ID: <510uf3F1i9oo6U1@mid.uni-berlin.de>

siggi wrote:

> Hi all,
> 
> does Python support MPEG or MOV videoclips? I couldn't find anything about
> it online.

Weak in googling today? Must have been a rough weekend.

There are several options, including pymedia and pygame.

Diez


From Shellby at mindspring.com  Sun Jan 21 18:19:06 2007
From: Shellby at mindspring.com (Sarah)
Date: Sun, 21 Jan 2007 23:19:06 GMT
Subject: ~~~~~~~~ Amazing Real Booby Downloads ~~~~~~~`
Message-ID: <KxSsh.754630$5R2.400847@pd7urf3no>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070121/a0694017/attachment.html>

From citronelu at yahoo.com  Mon Jan  8 18:15:54 2007
From: citronelu at yahoo.com (citronelu at yahoo.com)
Date: 8 Jan 2007 15:15:54 -0800
Subject: Execute binary code
In-Reply-To: <50fujcF1g1nplU2@mid.individual.net>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<EOSdneXxmrS6OT_YnZ2dnUVZ_q7inZ2d@comcast.com>
	<50fujcF1g1nplU2@mid.individual.net>
Message-ID: <1168298153.982394.181090@q40g2000cwq.googlegroups.com>


Bjoern Schliessmann wrote:
> But you could technically achieve this with standard python too
> (just write python source and spawn a python process executing it).

The code I try to execute is Windows specific and it is binary, not
python. Furthermore, it is stored in a variable within the parent
python script, not stored on harddisk as a file.



From Roberto.Bonvallet at cern.ch  Thu Jan 18 05:15:57 2007
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Thu, 18 Jan 2007 10:15:57 +0000 (UTC)
Subject: One more regular expressions question
References: <1169113767.320500.71200@11g2000cwr.googlegroups.com>
Message-ID: <eonhct$77p$1@cernne03.cern.ch>

Victor Polukcht wrote:
> My actual problem is i can't get how to include space, comma, slash.

Post here what you have written already, so we can tell you what the
problem is.

-- 
Roberto Bonvallet


From piet at cs.uu.nl  Thu Jan  4 09:00:49 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Thu, 04 Jan 2007 15:00:49 +0100
Subject: How do I add users using Python scripts on a Linux machine
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
	<ene0j1$6nk$03$1@news.t-online.com>
	<m2fyatcddg.fsf@ordesa.cs.uu.nl>
	<eng5qv$6l4$00$1@news.t-online.com>
Message-ID: <m2hcv651ta.fsf@ordesa.cs.uu.nl>

>>>>> Sebastian 'lunar' Wiesner <basti.wiesner at gmx.net> (SW) wrote:

>SW> I don't see a problem with SUID on scripts. If you restrict write access
>SW> to the owner, modification is hardly possible. 
>SW> However, if you allow world-wide write access to your binaries and
>SW> scripts, both can easily be modified...

The scenario is as follows: Suppose the script starts with the line:
#!/usr/bin/python

(using #!/usr/bin/env python would be disastrous because the user could
supply his own `python interpreter' in his PATH.)

Now a malicious user can make a link to this file in his own directory,
e.g. to /Users/eve/myscript1. Because permissions are part of the file
(inode), not of the file name, this one is also suid.

Now she execs /Users/eve/myscript1. The kernel, when honoring suid scripts,
would startup python with effective uid root with the command line:
/usr/bin/env /Users/eve/myscript1

Now in another process eve changes the link /Users/eve/myscript1 to
point to another script /Users/eve/myscript2. If she manages to change the
link between the startup of the python executable and the interpreter
opening the file /Users/eve/myscript1, she has her own script running as
root.

Of course the timing is a bit critical but if you try often enough some
time it will succeed. The problem is the time window between starting the
executable and opening the script. There is no guarantee that the file will
be the same. It can only be made safe if interpreters can be passed inodes
or opened files by the kernel, but that is not how most interpreters work.
At least not python.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From deets at nospam.web.de  Mon Jan 29 10:45:43 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 29 Jan 2007 16:45:43 +0100
Subject: HTMLParser's start_tag method never called ?
References: <1170084691.837503.10520@j27g2000cwj.googlegroups.com>
Message-ID: <526j57F1mn0bdU1@mid.uni-berlin.de>

ychaouche wrote:

> Hi, python experts.
> 
> <console trace>
> chaouche at CAY:~/TEST$ python nettoyageHTML.py
> chaouche at CAY:~/TEST$
> </console trace>
> 
> This is the nettoyageHTML.py python script
> 
> <code>
> from HTMLParser import HTMLParser
> 
> class ParseurHTML(HTMLParser):
>     def __init__(self):
>         HTMLParser.__init__(self)
> 
>     def start_body(self,attrs):
>         print "this is my body"
> 
> p = ParseurHTML()
> p.feed(open("/home/chaouche/TEST/AJAX/testXMLRPC.html","r").read())
> </code>
> 
> this is the testXMLRPC.html html file :
> 
> <html>
> <head>
> <script type="text/javascript" language="javascript"
> src="ClientXMLRPC.js">
> </script>
> 
> <script type="text/javascript" language="javascript" >
> 
>     if (typeof netscape != 'undefined' && typeof netscape.security !=
> 'undefined') {
> 
> netscape.security.PrivilegeManager.enablePrivilege('UniversalBrowserRea
> d');
>     }
> 
> var chiffre = 0;
> handler = function (self){
>     if (self.xmlhttp.readyState == 4) {
>         reponse = self.xmlhttp.responseText;
> //dump(reponse); permet d'acceder au dom si ce qu'on a recu est une
> forme de xml.
> document.getElementById("txt").innerHTML=reponse;
>     }
> }
> 
> function recupDonnees(){
>     chiffre+=1;
>     client = new ClientXMLRPC();
>     client.setUrl("http://10.75.49.100:8081/bonjour/sayHi?
> chiffre="+chiffre);
>     client.executer();
>     client.handlerEvenement = handler;
> }
> recupDonnees();
> 
> </script>
> </head>
> <body>
> 
> <span id="txt">NON</span>
> </body>
> </html>
> 
> 
> The script should output "this is my body", but nothing is printed.
> Anyone ?

You need a p.close() after the feed I guess.

Diez


From __peter__ at web.de  Tue Jan 23 18:07:35 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 24 Jan 2007 00:07:35 +0100
Subject: Overloading assignment operator
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
	<ep5kt4$sun$01$1@news.t-online.com>
	<pan.2007.01.23.22.17.26.616891@REMOVE.THIS.cybersource.com.au>
Message-ID: <ep64f2$6i4$00$1@news.t-online.com>

Steven D'Aprano wrote:

> On Tue, 23 Jan 2007 19:42:01 +0100, Peter Otten wrote:
> 
>> Achim Domma wrote:
>> 
>>> I want to use Python to script some formulas in my application. The user
>>> should be able to write something like
>>> 
>>> A = B * C
>>> 
>>> where A,B,C are instances of some wrapper classes. Overloading * is no
>>> problem but I cannot overload the assignment of A. I understand that
>>> this is due to the nature of Python, but is there a trick to work around
>>> this?
>> 
>>>>> class D(dict):
>> ...     def __setitem__(self, key, value):
>> ...             print key, "<--", value
>> ...             dict.__setitem__(self, key, value)
>> ...
>>>>> namespace = D(B=42, C=24)
>>>>> exec "A = B * C" in namespace
>> A <-- 1008
> 
> Very clever, except:
> 
> (1) The Original Poster's requirement was for a "clean syntax" and
> 'exec "A = B * C" in namespace' is anything but a clean syntax.
> 
> (2) The O.P. specifies that the syntax is for use by his users. We don't
> know who these users are, but can you see users getting this right and not
> ignoring the namespace argument?

I thought he might hide everything but the expression

A = B * C

from the user.
 
> (3) Even if they do use the namespace argument, how hard is it for the
> users to break the security of your exec?
> 
>>>> exec "A = B * C;import os;os.system('ls -l break-something')" in
>>>> namespace
> A <-- 1008
> os <-- <module 'os' from '/usr/lib/python2.4/os.pyc'>
> -rw-rw-r-- 1 steve steve 0 Jan 24 08:27 break-something
> 
> Using exec on user-supplied data is just begging to be p0wned.

Yes. Unless the application is deployed to the user's machine, in which case
he has more straightforward methods to destroy his own data.

Peter



From wolfson at gmail.com  Wed Jan 24 00:23:07 2007
From: wolfson at gmail.com (Ben Wolfson)
Date: Tue, 23 Jan 2007 21:23:07 -0800
Subject: sqlite user-defined functions & unicode issue
Message-ID: <6282abf10701232123p306a85adq9ddf49f9ad2d56b8@mail.gmail.com>

I've got a db some of whose elements have been created automatically
from filesystem data (whose encoding is iso-8859-1).  If I try to
select one of those elements using a standard SQL construct, things
work fine:

>>> sqlite.register_converter("text", unicode)
>>> db = sqlite.connect(".mdb/database", detect_types=sqlite.PARSE_COLNAMES)
>>> cursor = db.cursor()
>>> cursor.execute("SELECT * FROM artists WHERE name LIKE ?", ("John
Butcher%",)).fetchall()
[(1653, u'John Butcher & Eddie Pr\xe9vost')]
>>>

But if I use the pysqlite recipe for searching with a regexp, things don't work:
>>> db.create_function("regexp", 2, regexp)
>>> cursor.execute("SELECT * FROM artists WHERE REGEXP(?, name)",
('John Butcher',)).fetchall()

Traceback (most recent call last):
  File "<pyshell#14>", line 1, in -toplevel-
    cursor.execute("SELECT * FROM artists WHERE REGEXP(?, name)",
('John Butcher',)).fetchall()
OperationalError: user-defined function raised exception
>>>

Testing reveals that "item" is passed as None:
>>> def regexp(expr, item):
	if item is None: return False
	r = re.compile(expr, re.I)
	return r.search(item) is not None

>>> db = sqlite.connect(".mdb/database", detect_types=sqlite.PARSE_COLNAMES)
>>> db.create_function("regexp", 2, regexp)
>>> cursor.execute("SELECT * FROM artists WHERE REGEXP(?, name)",
('John Butcher',)).fetchall()
[]
>>>

How can I get around this?  I really want to be able to search by
regexp, and not just the standard SQL %-pattern.

-- 
Ben Wolfson
"However, identifying what we call 'time' or even 'space', which I
shall mention soon, is a very difficult problem, and a philosopher
would say that it is an extremely annoying subject."
(Soseki Natsume, "The Philosophical Foundations of Literature")


From Sebastien.Boisgerault at gmail.com  Wed Jan 17 14:22:05 2007
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 17 Jan 2007 11:22:05 -0800
Subject: XLM prolgoue
References: <1169054322.500863.313660@11g2000cwr.googlegroups.com>
Message-ID: <1169061724.975465.211010@s34g2000cwa.googlegroups.com>

fscked wrote:
> How do I go about creating the XML prologue like I want it to be?

> Specifically, I am trying to add encoding and some namespace stuff.

The XML declaration and the DTD that may appear in the prolog are
optional.

[22]   	prolog ::= XMLDecl? Misc* (doctypedecl  Misc*)?
[23]   	XMLDecl ::= '<?xml' VersionInfo EncodingDecl? SDDecl? S? '?>'

If your encoding is UTF-8 (or ASCII ...) you don't need an XML
declaration. Otherwise everything depends on the XML lib you
use.  For ElementTree, `tostring(elt, "ISO-8859-1")` for example
will automatically include the right declaration at the beginning
of your xml string ...

There is no namespace information inside the prolog. Such
"stuff" may appear inside the root element. Again, RTFM of
your specific XML lib :) For ElementTree, see
http://effbot.org/zone/element.htm#xml-namespaces

Cheers,

SB



From Eric_Dexter at msn.com  Sat Jan 20 10:09:40 2007
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 20 Jan 2007 07:09:40 -0800
Subject: when format strings attack
In-Reply-To: <eor81m$fuu$1@gemini.csx.cam.ac.uk>
References: <1169207467.989977.162940@q2g2000cwa.googlegroups.com>
	<pan.2007.01.19.19.06.43.598000@REMOVE.THIS.cybersource.com.au>
	<eor81m$fuu$1@gemini.csx.cam.ac.uk>
Message-ID: <1169305780.851809.11520@38g2000cwa.googlegroups.com>

I will give the formatting a try.  I noticed another formatting thing I
wasn't looking for.  It is possible to have a \n at the end of a word
or at least that is how it is shown and fixed through python 2.5.  I
had an error where 36\n isn't a number.  easy to fix though.


Jeremy Sanders wrote:
> Steven D'Aprano wrote:
>
> > os.system('dir -l %s' % 'text.txt')
> >
> >
> > Now, there is a security risk: you might set command1 yourself, and
> > allow the user to set args. If command1 is an external application
> > with a security hole, and the user provides arguments that trigger that
> > bug, then naturally your application will inherit whatever security
> > vulnerabilities the external application suffers from. No surprises there.
>
> There are also big risks like this
>
> filename = 'foo; rm importantfile'
> cmd = 'ls %s' % filename
> os.system(cmd)
> 
> oops!
> 
> -- 
> Jeremy Sanders
> http://www.jeremysanders.net/



From jussij at zeusedit.com  Tue Jan 23 01:15:05 2007
From: jussij at zeusedit.com (jussij at zeusedit.com)
Date: 22 Jan 2007 22:15:05 -0800
Subject: Python Windows Editors
In-Reply-To: <79e7c$45b3facb$d443bb3a$7251@news.speedlinq.nl>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<79e7c$45b3facb$d443bb3a$7251@news.speedlinq.nl>
Message-ID: <1169532905.087232.220040@38g2000cwa.googlegroups.com>

Stef Mientki wrote:

> there a too many (good) IDE's for Python ;-)

FWIW the Zeus for Windows IDE has Python support:

   http://www.zeusedit.com/python.html

Zeus has standard IDE features like syntax highlighting,
integrated version control, project/workspace, class
browsing etc, but it does smart indenting and code
folding for Python and you can even write Zeus
macros using Python ;)

It is even possible to integrate the Python SDK help
directly into the editor:

  http://www.zeusedit.com/forum/viewtopic.php?t=8

> I tried 2 of them, and only was stable enough:

Zeus is rock solid ;)

Jussi Jumppanen
Author: Zeus for Windows



From anthonybaxter at gmail.com  Tue Jan  2 23:47:32 2007
From: anthonybaxter at gmail.com (Anthony Baxter)
Date: Wed, 3 Jan 2007 15:47:32 +1100
Subject: Looking for python SIP/MGCP stacks
In-Reply-To: <1ECA23B17E8AB54C859FA0449B729F0E03428702@xmb-sjc-235.amer.cisco.com>
References: <1ECA23B17E8AB54C859FA0449B729F0E03428702@xmb-sjc-235.amer.cisco.com>
Message-ID: <e69d3ed20701022047l5e697379q1dfe802824f24b80@mail.gmail.com>

On 1/3/07, Jenny Zhao (zhzhao) <zhzhao at cisco.com> wrote:
> Thanks Anthony.
>
> I am wondering where I can get Divmod Sine and Shtoom. Are they open
> source ?
>
> Thanks again
> Jenny

http://www.google.com/search?q=divmod+sine
http://www.google.com/search?q=shtoom


From wangshuhao at sina.com  Wed Jan 24 09:39:35 2007
From: wangshuhao at sina.com (Wang Shuhao)
Date: Wed, 24 Jan 2007 22:39:35 +0800
Subject: sys.path issue in cygwin
References: <002401c73f8f$b9f7da90$14fd0179@WANGSHUHAO>
	<ep7nni$5op$2@sea.gmane.org>
Message-ID: <002901c73fc5$7a045540$1400a8c0@mytomato>

There is only python2.2.3 on my machine, and the location is /usr/local/lib/python2.2 . I say the 'C/lib/python2.2/' is a wrong path is because the leading C/lib is not point to the location of my python installation. I'v found the solution anyway. The environment variable PYTHONHOME controls the content of the initial sys.path. put 
export PYTHONHOME=/usr/local in .bash_profile will fix it.

----- Original Message ----- 
From: "Steve Holden" <steve at holdenweb.com>
To: <python-list at python.org>
Sent: Wednesday, January 24, 2007 9:42 PM
Subject: Re: sys.path issue in cygwin


> Wang Shuhao wrote:
>>  
>>  
>> I successfully built and installed Python 2.2.3 in cygwin. But there is 
>> something wrong in the sys.path. I use following statments for a test.
>>  
>>  >>> import sys
>>  >>> print sys.path
>> ['', 'C/lib/python2.2/', 'C/lib/python2.2/plat-cygwin', 
>> 'C/lib/python2.2/lib-tk'
>> , '\\Python24/lib/python2.2/lib-dynload']
>>  >>>
>>  
>> To keep the question simple, I've set PATH= in cygwin.bat to avoid 
>> python initialze sys.path from Windows' PATH environment.
>>  
>> Obviously, 'C/lib/python2.2/' is a wrong path. In fact my python is 
>> installed in /usr/local/lib/python2.2.3. The result of the issue is that 
>> when you run a program python can't find the module. So what I really 
>> want to know is where these path came from and how to fix it.
>>  
>>  
>> 
> Why "obviously"? 2.2.3 and 2.2.2 aren't meant to coexist, so one will
> install over the other. So the directories you are seeing are what would
> be used with standard prefix settings.
> 
> If you mean "obviously because I used a setting to configure the
> prefixes for loading from a specific directory" then perhaps you are
> suffering from having set your Windows PATH. If you *don't* set your
> Windows PATH do you see it using the "2.2.3" variants?
> 
> Did you run "make install"?
> 
> Just a couple of random thoughts ... are you even sure that running the
> "python" command does run your new 2.2.3 binary?
> 
> regards
> Steve
> -- 
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb     http://del.icio.us/steve.holden
> Blog of Note:          http://holdenweb.blogspot.com
> 
>


--------------------------------------------------------------------------------


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

From deacon.sweeney at gmail.com  Tue Jan 30 17:13:07 2007
From: deacon.sweeney at gmail.com (deacon.sweeney at gmail.com)
Date: 30 Jan 2007 14:13:07 -0800
Subject: Resizing widgets in text windows
In-Reply-To: <op.tmwp1letrqur0o@eb.pragmadev>
References: <1169847315.631951.295830@a75g2000cwd.googlegroups.com>
	<op.tmwp1letrqur0o@eb.pragmadev>
Message-ID: <1170195187.058117.14830@q2g2000cwa.googlegroups.com>

On Jan 29, 3:33 am, "Eric Brunel" <eric_bru... at despammed.com> wrote:
> On Fri, 26 Jan 2007 22:35:20 +0100, <deacon.swee... at gmail.com> wrote:
> > Hi, I've been searching for a .resize()-like function to overload much
> > like can be done for the delete window protocol as follows:
>
> > toplevel.protocol("WM_DELETE_WINDOW", callback)
>
> > I realize that the pack manager usually handles all of the resize
> > stuff, but I've found an arrangement that the pack manager fails for.
> > That is, if one embeds a canvas into a window created inside a text
> > widget, then resize the text widget (via its container), the canvas and
> > its container windows do not resize.
>
> Supposing you call "embedding" inserting a widget in the text via the
> window_create method, why should they? Embedding a window in a Text is
> used to put some arbitrary widget in the middle of the text it contains.
> So the embedded widget has no reason to grow or shrink with the parent
> Text widget: it just moves with the text.
>
> > So I need to resize the window
> > that the canvas is embedded in. The most obvious way of doing this
> > would be as above, but there does not seem to be an equivalent to the
> > "WM_DELETE_WINDOW" protocol for resizing.
>
> As James said, the <Configure> event is your friend. But I'm not sure I
> understand your use case...
>
> HTH
> --
> python -c "print ''.join([chr(154 - ord(c)) for c in
> 'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"

I'm using a text widget to hold a set of plots, one plot per line, 
such that the scrolling capability of the text widget can be taken 
advantage of to display only a subset of the plots at any given time. 
In the analyses my program automates, there are at least several plots 
are typically loaded into the text widget. This works out splendidly, 
but the width of the plots has thus far been a static thing. Now, I'll 
be able to adjust the plots widths so that when the owner window is 
resized, the width of each plot in the text widget is adjusted and the 
plot continues to occupy the entire text widget but no more, making 
for a much more professional looking product.

I didn't mean to imply that create_window widgets should automatically 
resize with the toplevel... I just couldn't find any way to force it.

Muchas gracias.

Deacon






From jmfbahciv at aol.com  Thu Jan 11 08:52:22 2007
From: jmfbahciv at aol.com (jmfbahciv at aol.com)
Date: Thu, 11 Jan 07 13:52:22 GMT
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
	<N6Uoh.43209$wc5.29633@newssvr25.news.prodigy.net>
	<eo2t6h$8qk_014@s808.apx1.sbo.ma.dialup.rcn.com>
	<0001HW.C1CA63B1059BC980F0203648@news.verizon.net>
	<eo33rr$8ss_008@s1005.apx1.sbo.ma.dialup.rcn.com>
	<MPG.200f26e6b5607c46989ef0@news.individual.net>
Message-ID: <eo5fem$8qk_007@s814.apx1.sbo.ma.dialup.rcn.com>

In article <MPG.200f26e6b5607c46989ef0 at news.individual.net>,
   krw <krw at att.bizzzz> wrote:
>In article <eo33rr$8ss_008 at s1005.apx1.sbo.ma.dialup.rcn.com>, 
>jmfbahciv at aol.com says...
>> In article <0001HW.C1CA63B1059BC980F0203648 at news.verizon.net>,
>>    Lefty Bigfoot <nunya at busyness.info> wrote:
>> >On Wed, 10 Jan 2007 08:28:33 -0600, jmfbahciv at aol.com wrote
>> >(in article <eo2t6h$8qk_014 at s808.apx1.sbo.ma.dialup.rcn.com>):
>> >
>> >> In article <N6Uoh.43209$wc5.29633 at newssvr25.news.prodigy.net>,
>> >>    "Elan Magavi" <Elan at nomailnospam.com> wrote:
>> >>> Is that like.. OctaPussy?
>> >> 
>> >> I didn't read their stuff.  Are they really trying to put a 
>> >> round peg in a square hole?
>> >
>> >Sounds more like an octagonal pole in a round hole.
>> 
>> Nah, I figured they picked the word octal because it's never
>> been used before.....
>
>....and "HexaPussy" just wouldn't be right.
>
Right.  The PC types would put them in jail for being cruel
to animals.

/BAH


From newstips6706 at yahoo.com  Wed Jan 17 21:35:18 2007
From: newstips6706 at yahoo.com (newstips6706 at yahoo.com)
Date: 17 Jan 2007 18:35:18 -0800
Subject: 1, 2, 3, 5, 7... PRIME Numbers
Message-ID: <1169087718.529514.45710@11g2000cwr.googlegroups.com>

1, 2, 3, 5, 7... PRIME Numbers

[ Mathematics / Physics / Engineering ]

________________________________

Definitions

What is a PRIME Number ?

A PRIME number is a number whose only positive divisors are one and
itself.

What is a MAGIC SQUARE?

A magic square is an arrangement of numbers in a square, such that the
numbers in all rows, all columns, and both diagonals sum to the same
number.
________________________________

MAGIC SQUARES & PRIME Numbers

The secret of PRIME Numbers are embedded within the puzzle known as
"MAGIC SQUARES".

PRIME Numbers and Magic Squares go hand in hand.

PRIME Numbers & The Number '1'

PRIME Numbers are the progress of TIME or The Number '1' in the
universe.

Another definition of "Science" is the comprehension of PRIME Numbers.

The Number '1' is like "a seed" and PRIME Numbers is the "tree" that
grows or progresses from that seed. The seed and the tree are one and
the same.

________________________________

The Comphrehension of the Number '1' IS the study of PRIME Numbers, for
the Number '1' is the only number in the universe that is truly
"indivisible".

Since PRIME Numbers take on the nature of the Number '1', and the
Number '1' is the seed of all PRIME Numbers, therefore the Number '1'
is PRIME Number.
________________________________

To "divide" a PRIME by "itself" OR by the Number '1', results in a
"canceling of itself out" OR the PRIME Number "dissolves into its
original state" of "NOTHING" OR .

EXAMPLES:

1 / 1 =  PI

2 / 1 =  PI

2 / 2 =  PI

3 / 1 =  PI

3 / 3 =  PI

etc.

________________________________

PRIME Numbers & TIME

To count 'TIME' is to count the number of 'coincidences' OR same - time
- occurrences of The Number '1'.

"To count TIME" IS NOT EQUAL TO "measuring TIME" in "seconds",
"minutes", "hours", "days", etc.

To measure TIME in "seconds", "minutes", etc. is impossible.

THEREFORE

"To count TIME" IS to count in (the) PRIME Numbers:

1,2,3,5,7,11,13...



From freelapbandseminar at yahoo.com  Fri Jan 19 04:26:14 2007
From: freelapbandseminar at yahoo.com (AwesomeMultimedia.com)
Date: 19 Jan 2007 01:26:14 -0800
Subject: www.OutpatientSurgicare.com/video/
Message-ID: <1169198774.479699.107300@l53g2000cwa.googlegroups.com>

www.OutpatientSurgicare.com/video/
Outpatient Doctors Surgery Center is committed to offering the
healthcare the community needs.  We offer patients a meaningful
alternative to traditional surgery. This state-of-the-art outpatient
surgery center, located in the heart of Orange County, at 10900 Warner
Avenue, Suite 101A, Fountain Valley, Ca 92708, offers the latest
innovations in outpatient surgery and technology.
Please Call For Our Special Cash Discount
Toll Free: 1-877-500-2525
Please Visit Our Websites:
We offer extreme cosmetic surgery makeover packages.
http://www.SurgeonToTheStars.com
http://www.1cosmeticsurgery.com
Specializing in the cure of hyperhidrosis, sweaty palms, underarm and
foot sweating.
http://www.CuresweatyPalms.com
http://www.ControlExcessiveSweating.com
No. 1 Weight Loss Surgery Center
http://www.ControlWeightLossNow.com
http://www.FreeLapBandSeminar.com
Hernia Treatment Center
http://www.HerniaDoc.com
Take care of your feet
http://www.CureFootPain.com
The Experts in CARPAL TUNNEL SYNDROME
http://www.CureHandPain.com

Accidental Urine Leaks ?  End Urinary Incontinence
http://www.WomanWellnessCenter.com
Hemorrhoid Treatment Center
http://www.hemorrhoidtreatmentcenter.com



From bbands at gmail.com  Fri Jan 26 11:59:17 2007
From: bbands at gmail.com (BBands)
Date: 26 Jan 2007 08:59:17 -0800
Subject: time series data and NumPy
Message-ID: <1169830757.220964.196540@m58g2000cwm.googlegroups.com>

Good morning,

I store time series data in a SQL database. The results of a typical
query using pyodbc look like this.

Date            Close
"2007-01-17" 22.57

Where Date is a datetime.date object and Close is a float.

I'd like to put this data in a NumPy array for processing, but am
unsure as to how to handle the date. In the past I've used lists, but I
am looking to boost speed a bit as I wish to do a large number of
transformations and comparisons.

Can one index an array using datetime objects?

For example it would be nice to do a union of two arrays so that any
dates missing in either one were eliminated.

Thoughts on doing rolling operations, such as an n-period average or
variance?

Thoughts on working with time series data in arrays in general?

Thanks in advance,

    jab--who is very happily returning to Python after a sojourn in
R-land



From jonc at icicled.net  Sun Jan 28 18:17:59 2007
From: jonc at icicled.net (Jonathan Curran)
Date: Sun, 28 Jan 2007 17:17:59 -0600
Subject: Data structure and algorithms
In-Reply-To: <1170025297.838143.191740@j27g2000cwj.googlegroups.com>
References: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
	<1170025297.838143.191740@j27g2000cwj.googlegroups.com>
Message-ID: <200701281717.59485.jonc@icicled.net>

What are you trying to make in the first place? A singly linked list? If so 
google is littered with examples of linked lists done in python. A simple 
search for 'python linked list' brings up many results.

Btw, for future reference, no need for apologetics (the second post).

- Jonathan


From bignose+hates-spam at benfinney.id.au  Tue Jan 30 19:10:46 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 31 Jan 2007 11:10:46 +1100
Subject: Garbage collection (was: how to "free" an object/var ?)
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
Message-ID: <87ejpcvywp.fsf@benfinney.id.au>

Stef Mientki <S.Mientki-nospam at mailbox.kun.nl> writes:

> If I create a large array of data or class, how do I destroy it
> (when not needed anymore) ?

Python comes with garbage collection, which is enabled by default.
Some time after your code stops needing the object, the garbage
collector will clean it up.

To check whether your Python has garbage collection enabled, you can
use the 'gc' interface module:

    Python 2.4.4 (#2, Jan 13 2007, 17:50:26)
    [...]
    >>> import gc
    >>> gc.isenabled()
    True
    >>> help(gc)

This module is only needed if you want to *interact* with the garbage
collector, which you won't unless you want to tune it or turn it off.

-- 
 \          "Immorality: The morality of those who are having a better |
  `\                                       time."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney



From ptwobrussell at gmail.com  Sat Jan 13 17:56:30 2007
From: ptwobrussell at gmail.com (MR)
Date: 13 Jan 2007 14:56:30 -0800
Subject: Decorators inside of class and decorator parameters
Message-ID: <1168728983.541526.202320@l53g2000cwa.googlegroups.com>

Hello All,

I have a question about decorators, and I think an illustration would
be helpful. Consider the following simple class:

#begin code
class Foo:
    def fooDecorator(f):
        print "fooDecorator"

        def _f(self, *args, **kw):
            return f(self, *args, **kw)

        return _f

    @fooDecorator
    def fooMethod(self):
        print "fooMethod"

f = Foo()
f.fooMethod()
#end of code

This code runs, and actually serves my purpose. However, I'm a little
confused about three things and wanted to try and work through them
while I had the time to do so. I believe all of my confusion is related
to the parameters related to the fooDecorator:

-how I would pass arguments into the fooDecorator if I wanted to (my
various attempts have failed)
-what the difference is between decorating with @fooDecorator versus
@fooDecorator()
-why does this code even work, because the first argument to
fooDecorator isn't self

I'm searched the net and read the PEPs that seemed relevant, but I
didn't see much about decorators inside of a class like this. Can
anyone comment on any of these three things?



From notsonice51 at yahoo.com  Tue Jan  9 22:36:17 2007
From: notsonice51 at yahoo.com (notsonice51 at yahoo.com)
Date: 9 Jan 2007 19:36:17 -0800
Subject: "tkinter module not found" please help
Message-ID: <1168400177.167870.61900@i56g2000hsf.googlegroups.com>

I'm trying to install python2.5 on my computer(os Fedora 5). My problem
is that I'm unable to get the tkinter module loaded into python. I've
tried the solution here:"wiki.python.org/moin/TkInter" but am unsure as
how to modify my setup.py script. I have installed the latest versions
of tcl/tk (8.4.14) twice as well as installing python again. Everything
is installed in the default location but still no luck.  Does anyone
have any ideas? Thank you.



From wolf_tracks at invalid.com  Sat Jan  6 11:06:02 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sat, 06 Jan 2007 08:06:02 -0800
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
	<mailman.2332.1168016502.32031.python-list@python.org>
	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>
	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>
Message-ID: <yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>

The wiki site lead to a link to download pythonwin, but the download is 
broken. Googling invariably leads back to that link. I found 
<http://www.python.org/download/releases/binaries-1.4/pythonwin/>, which has 
two files listed: oadist.exe and win32dbg.exe. Do I need both or is just the 
latter one?


          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

              ""I do not fear death. I had been dead for billions
                and billions of years before I was born, and had
                not suffered the slightest inconvenience from it."
                    -- Mark Twain (a nod to evolution)
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From nszabolcs at gmail.com  Mon Jan 29 19:32:42 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 29 Jan 2007 16:32:42 -0800
Subject: deepcopy alternative?
In-Reply-To: <45be808e$0$27074$4c368faf@roadrunner.com>
References: <45be808e$0$27074$4c368faf@roadrunner.com>
Message-ID: <1170117161.953913.276600@v33g2000cwv.googlegroups.com>

> I believe the only thing stopping me from doing a deepcopy is the
> function references, but I'm not sure.  If so is there any way to
> transform a string into a function reference(w/o eval or exec)?

what's your python version?
for me deepcopy(lambda:1) does not work in py2.4 but it works in py2.5
(in py2.4 i tried to override __deepcopy__ but it had no effect)



From arkanes at gmail.com  Fri Jan 26 10:48:35 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 26 Jan 2007 09:48:35 -0600
Subject: Win XP "Sleep" mode: can Py wake up?
In-Reply-To: <2387F0EED10A4545A840B231BBAAC722F117C8@slcimail1.slcgov.com>
References: <2387F0EED10A4545A840B231BBAAC722F117C8@slcimail1.slcgov.com>
Message-ID: <4866bea60701260748s1191a7et8fcc3a21b46e5dd4@mail.gmail.com>

On 1/26/07, Bell, Kevin <kevin.bell at slcgov.com> wrote:
> Does anyone have any experience having python deal with sleep mode?  I'd
> love to run something that would hear a sleep event coming and pickle
> some data before sleep, then after coming out of sleep, unpickle...
>
> Any thoughts?
>

The whole point of sleep mode is that the OS "pickles" it's state and
that of all processes, then restores them when it wakes up. The only
reason you, as an application, would need to do anything is if you're
consuming an external resource that can't survive sleep, like a
network connection. Even then, if your application is robust against
(non-sleep) network problems and outages you should be able to just
pick up where you left off when the network comes back online.


From gdamjan at gmail.com  Wed Jan 24 20:28:33 2007
From: gdamjan at gmail.com (Damjan)
Date: Thu, 25 Jan 2007 02:28:33 +0100
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169683654.672020.136820@q2g2000cwa.googlegroups.com>
	<7xveiwklt0.fsf@ruckus.brouhaha.com>
	<1169687269.885833.285410@a34g2000cwb.googlegroups.com>
	<7x8xfr6h0j.fsf@ruckus.brouhaha.com>
Message-ID: <45b807f8$0$49204$14726298@news.sunsite.dk>

>>  and the GIL is more than an "artifact".  It is a central tenet of
>> threaded python programming.
> 
> If it's a central tenet of threaded python programming, why is it not
> mentioned at all in the language or library manual?  The threading
> module documentation describes the right way to handle thread
> synchronization in Python, and that module implements traditional
> locking approaches without reference to the GIL.

And we all hope the GIL will one day die it's natural death ... 
maybe... probably.. hopefully ;)


-- 
damjan


From tiedon_jano at hotmail.com  Fri Jan  5 16:21:41 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Fri, 05 Jan 2007 21:21:41 GMT
Subject: Learning to program in Python
In-Reply-To: <mailman.2349.1168030739.32031.python-list@python.org>
References: <mailman.2349.1168030739.32031.python-list@python.org>
Message-ID: <Fjznh.445$sE.152@read3.inet.fi>

Demel, Jeff kirjoitti:
> If I were you, I'd think up a project and just build it.  The best way
> to really learn is to do, at least for me.  If you run into problems,
> then you can come back and ask the group here.  Believe me, I've asked
> some very basic questions, and everyone's been very friendly and
> helpful.
> 
> As an EE major, maybe you can think of some project that interests you
> and build it.  One thing that comes to mind is, maybe, a graphical
> program to lay out circuits?  Parts inventory program?  Circuit tester?
> I don't know, I was an English major, but you get the idea.
> 
> Anyway, try to think of a project that includes several of the key
> fundamentals of programming that we do every day, like reading and
> writing files, reading and writing to a database, GUI development, and
> things like that.
> 
> HTH
> 
> -Jeff
>  
> 
> -----Original Message-----
> From: python-list-bounces+jeff.demel=javelindirect.com at python.org
> [mailto:python-list-bounces+jeff.demel=javelindirect.com at python.org] On
> Behalf Of jbchua
> Sent: Friday, January 05, 2007 2:22 PM
> To: python-list at python.org
> Subject: Learning to program in Python
> 
> Hello everybody.
> 
> I am an Electrical Engineering major and have dabbled in several
> languages such as Python, C, and Java in my spare time because of my
> interest in programming. However, I have not done any practical
> programming because I have no idea where to get started. I taught myself
> these languages basically by e-tutorials and books. This makes me feel
> as if I don't really know how to implement these languages.
> Does anybody have any advice on where to start applying my limited
> knowledge practically in order to advance my learning?
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.

And choose a project on a subject you know well. The project should feel 
almost too easy to you. Believe me: it will still keep you busy but when 
you know your subject you can concentrate on learning to use Python as 
it should.

HTH,
Jussi


From nmm1 at cus.cam.ac.uk  Wed Jan 10 12:40:49 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 10 Jan 2007 17:40:49 GMT
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
Message-ID: <eo38f1$6cu$1@gemini.csx.cam.ac.uk>


In article <1168449342.414838.181050 at p59g2000hsd.googlegroups.com>,
"sturlamolden" <sturlamolden at yahoo.no> writes:
|> 
|> MPI is becoming the de facto standard for high-performance parallel
|> computing, both on shared memory systems (SMPs) and clusters.

It has been for some time, and is still gaining ground.

|> Spawning
|> threads or processes is not recommended way to do numerical parallel
|> computing.

Er, MPI works by getting SOMETHING to spawn processes, which then
communicate with each other.

|> Threading makes programming certain tasks more convinient
|> (particularly GUI and I/O, for which the GIL does not matter anyway),
|> but is not a good paradigm for dividing CPU bound computations between
|> multiple processors. MPI is a high level API based on a concept of
|> "message passing", which allows the programmer to focus on solving the
|> problem, instead on irrelevant distractions such as thread managament
|> and synchronization.

Grrk.  That's not quite it.

The problem is that the current threading models (POSIX threads and
Microsoft's equivalent) were intended for running large numbers of
semi-independent, mostly idle, threads: Web servers and similar.
Everything about them, including their design (such as it is), their
interfaces and their implementations, are unsuitable for parallel HPC
applications.  One can argue whether that is insoluble, but let's not,
at least not here.

Now, Unix and Microsoft processes are little better but, because they
are more separate (and, especially, because they don't share memory)
are MUCH easier to run effectively on shared memory multi-CPU systems.
You still have to play administrator tricks, but they aren't as foul
as the ones that you have to play for threaded programs.  Yes, I know
that it is a bit Irish for the best way to use a shared memory system
to be to not share memory, but that's how it is.


Regards,
Nick Maclaren.


From steve at REMOVEME.cybersource.com.au  Mon Jan  8 02:28:03 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Mon, 08 Jan 2007 18:28:03 +1100
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
	<pan.2007.01.07.22.10.37.701405@REMOVE.THIS.cybersource.com.au>
	<7xlkke19he.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.01.08.07.28.02.494235@REMOVEME.cybersource.com.au>

On Sun, 07 Jan 2007 19:30:05 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
>> > If you want to write bug-free code, pessimism is the name of the game.
>> 
>> I wonder whether Paul uses snow chains all year round, even in the blazing
>> summer? After all, "if you want to drive safely, pessimism is the name of
>> the game".
> 
> No.  I'm willing to accept a 10**-5 chance of hitting a freak
> snowstorm in summer, since I drive in summer at most a few hundred
> times a year, so it will take me 100's of years before I'm likely to
> encounter such a storm.  There are millions of drivers, so if they all
> take a similar chance, then a few times a year we'll see in the paper
> that someone got caught in a storm, which is ok.  Usually there's no
> real consequence beyond some inconvenience of waiting for a tow truck.
> 
> Tow truck or ambulance operators, on the other hand, should keep
> chains available all year around, since they have to service the needs
> of millions of users, have to be ready for freak summer storms.
> 
> As a software developer wanting to deploy code on a wide scale, I'm
> more like a tow truck operator than an individual car driver.
> Alternatively, as a coder I "drive" a lot more often.  If some Python
> misfeature introduces a bug with probability 10**-5 per line of code,
> then a 100 KLoc program is likely to have such a bug somewhere.  It
> doesn't take 100's of years.

That's an irrelevant argument. We're not talking about random bugs in
random places of code, we're talking about one specific type of bug which
can only occur in a handful of very restricted set of circumstances, e.g.
you have to inherit from two classes which not only have exactly the same
name but they also have the same private attribute.

Your argument is that Python's strategy for dealing with private
attributes is insufficiently pessimistic, because it doesn't deal with
those circumstances. Fine. I agree. Python isn't pessimistic. Does it need
to be? Just how often do you inherit from two identically-named classes
both of which use identically-named private attributes?

You suggested that coders (and by extension, Python) should behave with
equal pessimism whether they are subclassing two identically-named
classes or not. That's equivalent to the argument that one should use snow
chains whether it is snowing or not -- it only considers the benefit of
the extra protection, without considering the costs.

Python's private attribute handling balances convenience and protection,
giving more weight to convenience, trading off some protection. And
convenience gives increased productivity, easier debugging, few bugs
overall, and other Good Things. It would probably change the character of
Python unacceptably much to push that balance the other way.

Don't get me wrong, it is a good thing for you to alert people to the
circumstances that Python's strategy breaks down, so that they can "use
snow chains" in those circumstances. And, hey, if somebody reads this
thread and is motivated to find a better strategy that doesn't change the
nature of the language by too much, great. (This happened once before:
multiple inheritance was broken in classic classes, and new classes where
added partly to fix that.)

But chances are, the majority of Pythonistas will think that having to
use snow chains once in a very great while is an acceptable trade-off to
the smooth ride Python gives the rest of the time.


-- 
Steven D'Aprano 



From akhavr at kds.com.ua  Mon Jan 15 17:35:12 2007
From: akhavr at kds.com.ua (Andrey Khavryuchenko)
Date: Tue, 16 Jan 2007 00:35:12 +0200
Subject: [ANN] Py2Py 0.0.1 - python code reformatter, initial dev release
Message-ID: <m3irf7hqan.fsf@netmaster.kds.com.ua>

Folks,

We release development preview snapshot of Py2Py code reformatter [1].

It is a byproduct of the PyBeast project aimed to create the python
mutation tester.

Now Py2Py code reformatter ignores all comments and 80-char line length
requirement. Nevertheless, it produces the same AST as the original code.

The code is developed in a test-first manner and has 100% test coverage.

Feedback, criticism and bug reports are welcome.

Links: 
[1] http://trac.kds.com.ua/project/pybeast/  
[2] http://www.kds.com.ua/wp/2007/01/16/py2py-001-initial-development-snapshot/

-- 
Andrey V Khavryuchenko            
Software Development Company http://www.kds.com.ua/


From bdesth.quelquechose at free.quelquepart.fr  Sat Jan  6 17:16:26 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 06 Jan 2007 23:16:26 +0100
Subject: still struggling, howto use a list-element as a name ?
In-Reply-To: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
Message-ID: <45a01981$0$296$426a74cc@news.free.fr>

Stef Mientki a ?crit :
> In the example below, "pin" is an object with a number of properties.
> Now I want
> 1- an easy way to create objects that contains a number of these "pin"
> 2- an multiple way to access these "pin", i.e.
>         device.pin[some_index]
>     device.some_logical_name
> ad 1:
> a dictionary (as "pinlist" in the example) seems a very convenient     
> way (from a viewpoint of the device creator).
> As you can see in the "__init__" section this dictionary can easily be 
> transported to the pin-objects.
> 
> ad 2:
> THAT's the problem: how do automate these lines "self.GND = self.pin[0]"
> 
> I'm also in for other solutions.

I'm afraid I don't understand your design (nor the domain FWIW). A few 
comments anyway:

> 
> class Power_Supply(device):

Please reread my comments about naming convention in a previous thread...

>     pinlist = {

This is *not* a list, so naming it 'pinlist' is misleading. Also, why is 
this defined here ?

>         0: ('GND', _DIG_OUT, _par2),
>         1: ('VCC', _DIG_OUT, _par33)
>         }
> 
>     def __init__(self):
>         # store pin-names and pin-parameters in pins
>         for k in self.pinlist.keys():
>           self.pin[k].Name = self.pinlist[k][0]

What is 'self.pin' ? Where is it defined ? (NB : please try to post 
*runnable* code).

And FWIW, if it's a container, why is it named 'pin', and not 'pins' ?


>           self.pin[k].Value = self.pinlist[k][2]

The appropriate way to use the for loop here is:
           for k, v in self.pinlist.items():
              self.pin[k].name = v[0]
              # etc

>         # for some pins, we also want to be able to use logical names
>         # HOW TO USE SOMETHING like
>         #     "self.pinlist[0] = self.pin[0]"
>         # INSTEAD OF
>         self.GND = self.pin[0]
>         self.VCC = self.pin[1]

you can build a 'reversed index':
         # store pin-names and pin-parameters in pins
           for k, v in self.pinlist.items():
              self.pin[k].name = v[0]
              self.pin[k].value = v[2]
              self.reversed_index[v[0]] = self.pin[k]

and then use the __getattr__ hook:

   def __getattr__(self, name):
     return self.reversed_index[name]

But the whole thing still looks awfully convulted and kludgy to me, and 
I suspect serious design flaws... Why don't you try and explain  your 
real problem, instead of asking how to implement what you *think* is the 
solution ?


From no-spam at no-spam-no-spam.invalid  Thu Jan 11 09:17:49 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 11 Jan 2007 15:17:49 +0100
Subject: Parallel Python
In-Reply-To: <1168516936.890690.235300@p59g2000hsd.googlegroups.com>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<7x8xga215f.fsf@ruckus.brouhaha.com>
	<eo3bjj$cen$1@gemini.csx.cam.ac.uk>
	<eo52h9$kad$1@news.albasani.net>
	<1168516936.890690.235300@p59g2000hsd.googlegroups.com>
Message-ID: <eo5gtj$6bs$1@news.albasani.net>

sturlamolden wrote:
> robert wrote:
> 
>> Thus communicated data is "serialized" - not directly used as with threads or with custom shared memory techniques like POSH object sharing.
> 
> Correct, and that is precisely why MPI code is a lot easier to write
> and debug than thread code. The OP used a similar technique in his
> 'parallel python' project.

Thus there are different levels of parallelization:

1 file/database based; multiple batch jobs
2 Message Passing, IPC, RPC, ...
3 Object Sharing 
4 Sharing of global data space (Threads)
5 Local parallelism / Vector computing, MMX, 3DNow,...

There are good reasons for all of these levels.
Yet "parallel python" to me fakes to be on level 3 or 4 (or even 5 :-) ), while its just a level 2 system, where "passing", "remote", "inter-process" ... are the right vocables.

With all this fakes popping up - a GIL free CPython is a major feature request for Py3K - a name at least promising to run 3rd millenium CPU's ...


> This does not mean that MPI is inherently slower than threads however,
> as there are overhead associated with thread synchronization as well.

level 2 communication is slower. Just for selected apps it won't matter a lot.

> With 'shared memory' between threads, a lot more fine grained
> synchronization ans scheduling is needed, which impair performance and
> often introduce obscure bugs.

Its a question of chances and costs and nature of application.
Yet one can easily restrict inter-thread communcation to be as simple and modular or even simpler as IPC. Search e.g. "Python CallQueue" and "BackgroundCall" on Google.
Thread programming is less complicated as it seems. (Just Python's stdlib offers cumbersome 'non-functional' classes)


Robert


From gherron at islandtraining.com  Tue Jan 16 14:16:33 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 16 Jan 2007 11:16:33 -0800
Subject: How can I create a linked list in Python?
In-Reply-To: <eoj6rr$90bt$1@netnews.upenn.edu>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
Message-ID: <45AD2491.90907@islandtraining.com>

Dongsheng Ruan wrote:
> with a cell class like this:
>
> #!/usr/bin/python
>
> import sys
>
> class Cell:
>
>  def __init__( self, data, next=None ):
>   self.data = data
>   self.next = next
>
>  def __str__( self ):
>   return str( self.data )
>
>  def echo( self ):
>   print self.__str__() 
>   
If you really want a list (as Python defines a list - with all the methods) then you should use Python's lists.  They are quite efficient and convenient:

l = [Cell(1), Cell(2), Cell(3)]

However, if what you want is each cell to refer to a next cell (which after all is what a linked list does), then you already have it with the next attribute.  (In other languages you might implement 'next' as a pointer, while in Python we call it a reference -- but it amounts to the same thing.)  Create it this way:

c = Cell(3)
b = Cell(2, c) 
a = Cell(1, b)

or

a = Cell(1, Cell(2, Cell(3)))

However, I'll repeat this:  The concept of a linked list if a figment of languages with pointer data types.  Python abstracts that by allowing attributes to contain references to other objects.  However, you're much better off if you can use Python's list data structure rather than try to emulate an outdated concept in a modern language.

Gary Herron





From gagsl-py at yahoo.com.ar  Mon Jan 29 23:43:13 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 01:43:13 -0300
Subject: Getting the output from a console command while it's been
	generated!
References: <684b0a740701261905o76ca3a9av6425b88cd1c3b9fc@mail.gmail.com>
	<epeh79$nok$2@sea.gmane.org>
	<684b0a740701281854r7108415aqb43221ab5ad9a7d6@mail.gmail.com>
Message-ID: <op.tmwfgtbjsd1mbx@gabriel2.softlabbsas.com.ar>

En Sun, 28 Jan 2007 23:54:03 -0300, Ra?l G?mez C. <nachogomez at gmail.com>  
escribi?:

> I can't use the subprocess module because my app needs to be compatible  
> with
> Python 2.3 so, is there another approach to this problem???

Any variant of popen; see the popen2 module (but read the last notes on  
flow control issues).

-- 
Gabriel Genellina



From jrpfinch at gmail.com  Thu Jan 11 11:12:14 2007
From: jrpfinch at gmail.com (jrpfinch)
Date: 11 Jan 2007 08:12:14 -0800
Subject: Newbie question: SMTP -> SQL Server
In-Reply-To: <j0tph.33102$X97.7130@newsfe18.lga>
References: <1168529572.873867.207730@k58g2000hse.googlegroups.com>
	<j0tph.33102$X97.7130@newsfe18.lga>
Message-ID: <1168531934.015865.177100@i56g2000hsf.googlegroups.com>

Thank you.  I have just realised I completely misunderstand how SMTP
servers work.  From what I can tell, when you run the cookbook script
it listens locally on port 8025.

You then have to configure a Linux (in my case) account with a username
and password so my external piece of software (on another Windows
machine) can log in and use the SMTP server.

Then I write the some code in the cookbook example to redirect any mail
content to the MS SQL server database.

Note that the external piece of software can only talk SMTP - this is
why I am having to develop this script.

Does this sound sensible?  Any tips on how to configure my Linux box (I
don't have much experience with Linux either)?

Many thanks

Jon



From frank at chagford.com  Thu Jan  4 00:23:32 2007
From: frank at chagford.com (Frank Millman)
Date: 3 Jan 2007 21:23:32 -0800
Subject: Cannot build 2.5 on FC6 x86
In-Reply-To: <503a8vF1d8dn2U1@mid.individual.net>
References: <502e72F1eh7ngU1@mid.individual.net>
	<459c0ac1$0$28366$9b622d9e@news.freenet.de>
	<503a8vF1d8dn2U1@mid.individual.net>
Message-ID: <1167888210.999557.234760@i80g2000cwc.googlegroups.com>


Paul Watson wrote:
> Martin v. L?wis wrote:
> > Paul Watson schrieb:
> >> ./configure
> >> make
> >> make test
> >>
> >> The result appears to hang after the test_tkl... line.  I had to kill
> >> the 'make test' process which terminated it.  Any suggestions?
> >
>
> Sorry, I mis-typed.  It is not test_tkl.  It was test_tcl...
>
> The last line output was as shown below my mistyping.
>
> I let it sit overnight one time.

FWIW, this is my experience.

I installed 2.5 on FC6 a few weeks ago, and it has been running with no
problems.

I ran 'make test' now, and this is what I got.

Near the top of the output, I saw the following message -
    INFO: Can't locate Tcl/Tk libs and/or headers

When it got to test_tcl, it showed the following message -
    test_tcl skipped -- No module named _tkinter

At the end, it showed the following -
    284 tests OK.
    35 tests skipped:
        [snip details]
    1 skip unexpected on linux2:
        test_tcl

It ran to the end without stopping.

Hope this may be of some help in diagnosis.

Frank Millman



From gagsl-py at yahoo.com.ar  Thu Jan 18 12:15:44 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 18 Jan 2007 14:15:44 -0300
Subject: Is it possible to fasten the import of cgi?
References: <45af6f47$0$322$e4fe514c@news.xs4all.nl><mailman.2867.1169130619.32031.python-list@python.org>
	<45af8f52$0$339$e4fe514c@news.xs4all.nl>
Message-ID: <eooa02$uu9$1@sea.gmane.org>

"Cecil Westerhof" <dummy at dummy.nl> escribi? en el mensaje 
news:45af8f52$0$339$e4fe514c at news.xs4all.nl...
> Gabriel Genellina wrote:
>
>> "Cecil Westerhof" <dummy at dummy.nl> escribi? en el mensaje
>> news:45af6f47$0$322$e4fe514c at news.xs4all.nl...
>>
>>>I have a cgi-script dat uses the modules cgi, os, sys and time. Offcourse
>>>I
>>> can not time the time used to import time, but os and sys do not take
>>> more as a millisecond. My script itself takes 3 or 4 milliseconds. But
>>> importing
>>> cgi takes 95 milliseconds. (This is on my test system a PII 300 MHz. Is
>>> there a way to make this more fast? The import off cgi makes the script
>>> at least 20 times as slow. Something like mod-python is not a
>>> possibility. I could use it on my test machine, but not at the osting
>>> provider.
>> Surely os was imported earlier, and was already loaded. sys is a builtin
>> module. But I think your problem is not how much time takes importing 
>> cgi,
>> but how much time takes launching a new python process on each request.
>
> Nope, it was certainly cgi. When I fetch time after importing and after 
> the
> script finishes, the difference is 4 milliseconds. If I import the modules
> apart from cgi after I fetch the first time, there is added about 1
> millisecond to the difference. When I also import cgi after taking the
> time, the difference grows with 95 milliseconds. So for one reason ore
> another, cgi is very expensive.

I'll try to explain better: the cgi *protocol* (I'm not talking about the 
cgi *module*) requires a *new* python process to be created on *each* 
request. Try to measure the time it takes to launch Python, that is, the 
time from when you type `python ENTER` on your shell and the interpreter 
prompt appears. That time is wasted for *every* cgi request, and I bet it is 
much greater than the 95 ms you measure importing a module (be it cgi or 
whatever). You'll gain much more responsiveness if you can switch to another 
protocol, be it FastCGI, WSGI, mod_python or another.

Anyway, comparing the import time between os, sys, and cgi is not very 
meaningful. sys is a builtin module, so "import sys" does very little. os is 
likely to be already imported by the time your script begins, so "import os" 
just verifies that os is already in sys.modules. "import cgi" is the only 
example when Python actually has to load something, so it's not a surprise 
if it takes longer.

-- 
Gabriel Genellina 




From malaclypse2 at gmail.com  Thu Jan 11 11:26:21 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Thu, 11 Jan 2007 11:26:21 -0500
Subject: os.mkfifo
In-Reply-To: <eo5jh9$2ng$1@ss408.t-com.hr>
References: <eo5jh9$2ng$1@ss408.t-com.hr>
Message-ID: <16651e80701110826i4d6121b2wed42bbfaeaead28d@mail.gmail.com>

On 1/11/07, Gigs_ <gigs at hi.t-com.hr> wrote:
> is os.mkfifo available on windows xp

http://docs.python.org/lib/os-file-dir.html#l2h-2683

-- 
Jerry


From exarkun at divmod.com  Wed Jan 31 22:09:19 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 31 Jan 2007 22:09:19 -0500
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <45C1400B.2000204@mvista.com>
Message-ID: <20070201030919.25807.112618992.divmod.quotient.5435@ohm>

On Wed, 31 Jan 2007 17:19:07 -0800, "Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote:
>Jean-Paul Calderone wrote:
>> On Wed, 31 Jan 2007 15:13:59 -0800, "Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote:
>>
>>> Jean-Paul Calderone wrote:
>>>
>>>> [snip]
>>>>
>>>>>
>>>> You're right.  Learning new things is bad.  My mistake.
>>>>
>>>> Jean-Paul
>>>>
>>>>
>>> That isn't what I said at all.  You have to look at it from a
>>> cost/benefit relationship.  Its a waste of time/money to learn something
>>> complex to do something simple.  For the simple things, use a simple
>>> solution.  KISS.  When he has an application that would require
>>> something more complex, it would be at that point he should consider
>>> using it for a project.  Unless the OP has a desire to learn this
>>> technology, then more power to him.  I, however, do not believe that
>>> would be the best approach for a simple problem.
>>>
>>> Knowing the appropriate tool for the job is a trait of an good engineer.
>>>
>>>
>>
>> You are assuming that he already knows how to use threads, and so there
>> is no investment required for a threaded solution.  In my experience, it's
>> much safer to assume the opposite.  _Even_ (often _especially_ when a
>> threaded solution is explicitly requested.
>>
>I have a bit more confidence in python threads, but that takes us back
>to the age old debate on this list.  So we agree to disagree.
>

You misunderstand.  I wasn't expressing a lack of confidence in Python
threads, but in the facility with which they can be used by programmers.

Jean-Paul


From harvey.thomas at informa.com  Tue Jan 16 08:55:56 2007
From: harvey.thomas at informa.com (harvey.thomas at informa.com)
Date: 16 Jan 2007 05:55:56 -0800
Subject: re.sub and empty groups
References: <mailman.2773.1168952918.32031.python-list@python.org>
Message-ID: <1168955754.885882.318810@a75g2000cwd.googlegroups.com>


Hugo Ferreira wrote:

> Hi!
>
> I'm trying to do a search-replace in places where some groups are
> optional... Here's an example:
>
> >> re.match(r"Image:([^\|]+)(?:\|(.*))?", "Image:ola").groups()
> ('ola', None)
>
> >> re.match(r"Image:([^\|]+)(?:\|(.*))?", "Image:ola|").groups()
> ('ola', '')
>
> >> re.match(r"Image:([^\|]+)(?:\|(.*))?", "Image:ola|ole").groups()
> ('ola', 'ole')
>
> The second and third results are right, but not the first one, where
> it should be equal to the second (i.e., it should be an empty string
> instead of None). This is because I want to use re.sub() and when the
> group is None, it blows up with a stack trace...
>
> Maybe I'm not getting the essence of groups and non-grouping groups.
> Someone care to explain (and, give the correct solution :)) ?
>
> Thanks in advance,
>
> Hugo Ferreira
>
> --
> GPG Fingerprint: B0D7 1249 447D F5BB 22C5  5B9B 078C 2615 504B 7B85

>From the documentation:
groups( [default])
Return a tuple containing all the subgroups of the match, from 1 up to
however many groups are in the pattern. The default argument is used
for groups that did not participate in the match; it defaults to None.

Your second group is optional and does not take part in the match in
your first example. You can, however, still use this regular expression
if you use groups('') rather than groups().

A better way probably is to use a simplified regular expression

re.match(r"Image:([^\|]+)\|?(.*)", "Image:ola").groups()

i.e. match the text "Image:" followed by at least one character not
matching "|" followed by an optional "|" followed by any remaining
characters.



From smusnmrNOSPAM at yahoo.com  Thu Jan 11 09:32:25 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Thu, 11 Jan 2007 15:32:25 +0100
Subject: how to clean sys.path
References: <eo0eom$cirq$1@zam602.zam.kfa-juelich.de>
	<p3pbq2h0gaa9qkrl03iansir43vjjp00k7@4ax.com>
Message-ID: <eo5hpp$2tmo$1@zam602.zam.kfa-juelich.de>

"Tim Roberts"  wrote:
>>
>>when I do >>>sys.path in IDLE (winXP), i get a horrendously long list of
>>paths, paths I may have used during a lot of trials and errors. How can I
>>clean up sys.path? I mean, trim it of unnecessary paths?
>
> What do mean by "used during a lot of trials and errors"?  sys.path is
> recreated from scratch every time Python starts.  It doesn't accumulate
> over time, other than from new packages that you install.
> -- 
> Tim Roberts, timr at probo.com
> Providenza & Boekelheide, Inc.


Sorry Tim, my statement was not correct, due to my inexperience with Python.
And sorry, too, for my somewhat lengthy reply:
After having had inspected my current sys.path...

['C:\\Documents and Settings\\User\\My Documents\\My Python files',
'C:\\Documents and Settings\\User\\My Documents\\Python25\\Lib\\idlelib',
'C:\\Documents and Settings\\User\\My Documents\\Python25\\python25.zip',
'C:\\Documents and Settings\\User\\My Documents\\Python25\\DLLs',
'C:\\Documents and Settings\\User\\My Documents\\Python25\\lib',
'C:\\Documents and Settings\\User\\My Documents\\Python25\\lib\\plat-win',
'C:\\Documents and Settings\\User\\My Documents\\Python25\\lib\\lib-tk',
'C:\\Documents and Settings\\User\\My Documents\\Python25', 'C:\\Documents
and Settings\\User\\My Documents\\Python25\\lib\\site-packages',
'C:\\Documents and Settings\\User\\My
Documents\\Python25\\lib\\site-packages\\PIL', 'C:\\Documents and
Settings\\User\\My Documents\\Python25\\lib\\site-packages\\win32',
'C:\\Documents and Settings\\User\\My
Documents\\Python25\\lib\\site-packages\\win32\\lib', 'C:\\Documents and
Settings\\User\\My Documents\\Python25\\lib\\site-packages\\Pythonwin',
'C:\\Documents and Settings\\User\\My
Documents\\Python25\\lib\\site-packages\\wx-2.8-msw-ansi']

or in plain DOS:

C:\Documents and Settings\User\My Documents\My Python files
C:\Documents and Settings\User\My Documents\Python25\Lib\idlelib
C:\Documents and Settings\User\My Documents\Python25\python25.zip
C:\Documents and Settings\User\My Documents\Python25\DLLs
C:\Documents and Settings\User\My Documents\Python25\lib
C:\Documents and Settings\User\My Documents\Python25\lib\plat-win
C:\Documents and Settings\User\My Documents\Python25\lib\lib-tk
C:\Documents and Settings\User\My Documents\Python25
C:\Documents and Settings\User\My Documents\Python25\lib\site-packages
C:\Documents and Settings\User\My Documents\Python25\lib\site-packages\PIL
C:\Documents and Settings\User\My Documents\Python25\lib\site-packages\win32
C:\Documents and Settings\User\My
Documents\Python25\lib\site-packages\win32\lib
C:\Documents and Settings\User\My
Documents\Python25\lib\site-packages\Pythonwin
C:\Documents and Settings\User\My
Documents\Python25\lib\site-packages\wx-2.8-msw-ansi

...it just looked horrible to me at first sight!

If I interpret your explanation correctly, all these paths are necessary,
and not relics of previous installations and deinstallations.

What puzzles me, though, is, that e.g., when I run the wxPython application
"AnalogClock.py" with IDLE or in the command line , this works only in the
directory "...\My Python files\wxDemos\" . This directory contains all files
and folders from the original "\wx-2.8-msw-ansi\demos\").

When I copy AnalogClock.py to ...\My Python Files\  , nothing happens after
running it with IDLE or in the command line.
Appending 'C:\Documents and Settings\User\My Documents\My Python
files\wxDemos ' to the sys.path does not help either.

Thinking that I am clever, I  changed my sys.path with sclicing and
concatenation such that my sys.path starts with

'C:\Documents and Settings\User\My Documents\My Python files', 'C:\Documents
and Settings\User\My Documents\My Python files\wxDemos'. Now \wxDemos\ is
being searched very early.

... no way! After running AnalogClock.py again, this error message appears:

------------------------------------------
Traceback (most recent call last):
  File "C:\Documents and Settings\My Documents\My Python
files\wxAnalogClock.py", line 14, in <module>
    import wx
ImportError: No module named wx.
------------------------------------------

Very strange! Because all this wx stuff IS IN the directory 'C:\Documents
and Settings\User\My Documents\My Python files\wxDemos'. And AnalogClock.py
does work when residing in that directory.

Can you help me again?

Thanks,

siggi

P.S. On another PC where the python program is in c:\programs\python25\, 
same as above!








From python at hope.cz  Thu Jan 18 11:14:10 2007
From: python at hope.cz (Lad)
Date: 18 Jan 2007 08:14:10 -0800
Subject: How to read and write huge binary files
Message-ID: <1169136850.518228.103360@l53g2000cwa.googlegroups.com>

What is a good  way to read binary data from HUGE  file and write  it
to another file?
Thanks for help
La.



From pydecker at gmail.com  Sun Jan  7 11:39:48 2007
From: pydecker at gmail.com (Peter Decker)
Date: Sun, 7 Jan 2007 11:39:48 -0500
Subject: How to invoke parent's method?
In-Reply-To: <1168162412.253449.296520@38g2000cwa.googlegroups.com>
References: <1168138626.574514.102060@i15g2000cwa.googlegroups.com>
	<1168162412.253449.296520@38g2000cwa.googlegroups.com>
Message-ID: <ca55a9900701070839y6bbaf116s8a5803e73758a257@mail.gmail.com>

On 7 Jan 2007 01:33:32 -0800, Frank Millman <frank at chagford.com> wrote:

> The essential point is that you save a reference to the frame when you
> create the panel. Then when the button is clicked you can use the
> reference to call the frame's Close method.

Or you could look into Dabo. This is one of those common needs that
has been built into the framework. Any object on a form (a wx.Frame)
can simple reference 'self.Form' to get a reference to the containing
frame. Controls that are contained within other controls (such as
inside panels or notebook pages) can always reference that container
with 'self.Parent'.

-- 

# p.d.


From python at hope.cz  Sat Jan 27 12:24:50 2007
From: python at hope.cz (Johny)
Date: 27 Jan 2007 09:24:50 -0800
Subject: IP address of webserver
Message-ID: <1169918690.690636.42690@a75g2000cwd.googlegroups.com>

How can I find server's IP address?
>From console I can use ping, for example:

C:\RobotP\cgi-bin>ping www.google.com

Pinging www.google.com [209.85.129.147] with 32 bytes of data:

Reply from 209.85.129.147: bytes=32 time=30ms TTL=244
Reply from 209.85.129.147: bytes=32 time=30ms TTL=244
..
..
So I know  that www.google.com has 209.85.129.147  IP address.
But how can I find it directly from Python script?
Thanks for help
J.



From cbfalconer at yahoo.com  Tue Jan  9 15:16:44 2007
From: cbfalconer at yahoo.com (CBFalconer)
Date: Tue, 09 Jan 2007 15:16:44 -0500
Subject: Internet Survey
References: <1168354730.421464.159680@51g2000cwl.googlegroups.com>
Message-ID: <45A3F82C.AF4769A2@yahoo.com>

octabox at gmail.com wrote:
> 
> I represent Octabox, an Internet Start-up developing a wide-scale
> platform for Internet services.  We are very interested to know
> your thoughts on Internet productivity and how it might be
> improved, and to that end we have set up a short survey at our
> website - http://www.octabox.com/productivity_poll.php
> We would very much appreciate if you would take a couple of
> minutes to fill it up and influence our direction and empahsis.

Failure to set follow-ups on excessively cross-posted article.

Failure to give any incentive for response.

Failure to give any assurance of privacy.

Failure to monitor the various news-groups for suitability.

-- 
Chuck F (cbfalconer at maineline dot net)
   Available for consulting/temporary embedded and systems.
   <http://cbfalconer.home.att.net>




From nmm1 at cus.cam.ac.uk  Thu Jan 11 11:58:19 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 11 Jan 2007 16:58:19 GMT
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<7x8xga215f.fsf@ruckus.brouhaha.com>
	<eo3bjj$cen$1@gemini.csx.cam.ac.uk>
	<eo52h9$kad$1@news.albasani.net>
	<1168516936.890690.235300@p59g2000hsd.googlegroups.com>
	<eo5gtj$6bs$1@news.albasani.net>
Message-ID: <eo5qbb$i13$1@gemini.csx.cam.ac.uk>


In article <eo5gtj$6bs$1 at news.albasani.net>,
robert <no-spam at no-spam-no-spam.invalid> writes:
|> 
|> Thus there are different levels of parallelization:
|> 
|> 1 file/database based; multiple batch jobs
|> 2 Message Passing, IPC, RPC, ...
|> 3 Object Sharing 
|> 4 Sharing of global data space (Threads)
|> 5 Local parallelism / Vector computing, MMX, 3DNow,...
|> 
|> There are good reasons for all of these levels.

Well, yes, but to call them "levels" is misleading, as they are closer
to communication methods of a comparable level.

|> > This does not mean that MPI is inherently slower than threads however,
|> > as there are overhead associated with thread synchronization as well.
|> 
|> level 2 communication is slower. Just for selected apps it won't matter a lot.

That is false.  It used to be true, but that was a long time ago.  The
reasons why what seems to be a more heavyweight mechanism (message
passing) can be faster than an apparently lightweight one (data sharing)
are both subtle and complicated.


Regards,
Nick Maclaren.


From goofyheadedpunk at gmail.com  Thu Jan 18 16:09:59 2007
From: goofyheadedpunk at gmail.com (Brian L. Troutwine)
Date: 18 Jan 2007 13:09:59 -0800
Subject: distutils data file difficulties
Message-ID: <1169154599.262622.268380@s34g2000cwa.googlegroups.com>

I am new to the use of distutils and am having difficulty getting
distutils recognize and install data files. Here are the relevant parts
of my source directory:

ExampleTree/
|-- __init__.py
|-- data
|   |-- Example1.txt
|   |-- Example2.txt
|   `-- __init__.py
|-- subPackage1
|   |-- (...)
`-- subPackage2
    |-- (...)

I would like to install Example1.txt and Example2.txt under data/ upon
installation. I cannot seem to write a proper setup.py to accomplish
this. Here are the relevant bits of my setup.py:

#!/usr/bin/env python

from distutils.core import setup

setup(name="ExampleTree",
        (...),
        packages=['ExampleTree', ExampleTree/data',
'ExampleTree/subPackage1',
            ''ExampleTree/subPackage2'],
        package_dir={'data' : 'ExampleTree/data'},
        package_data={'data': ['Example1.txt', 'Example2.txt']},
        )

What am I doing incorrectly?



From m.yanowitz at kearfott.com  Mon Jan 22 10:48:48 2007
From: m.yanowitz at kearfott.com (Michael Yanowitz)
Date: Mon, 22 Jan 2007 10:48:48 -0500
Subject: Is there a better way to implement this:
Message-ID: <01aa01c73e3c$ce2416e0$0d7d12ac@kearfott.com>

Hello:

   I wrote the code below (much irrelevant code removed).
This doesn't quite work. What I wanted it to do was
 a) Execute function ftimed, which takes a function and a timeout
    in seconds.
 b) This will also execute function abort() as a thread.
    This function just runs for the specified
    number of seconds and returns.
    However, before it returns, throws an exception.
c)  If test() is still running when abort() is
    finished, ftimed() should catch the exception and
    return.

It is catching the exception, however it continues running the function.
Why does it continue and not return?

What am I missing, or is there a better way to
implement this (having ftimed() return when the
abort-timer time is exceeded?


import time, thread, sys

thread_finished = "MAX RUN TIME EXCEEDED!"

def abort (seconds):
     start_time = time.time()
     while ((time.time() - start_time) < seconds):
        time.sleep(0.01)
     print "script run time exceeded max_run_time of", seconds, "seconds."
     raise thread_finished
     return


def test():
    i = 0
    while (True):
       time.sleep(1)
       print "HELLO", i
       i+=1


def ftimed (func, seconds):
    thread.start_new_thread (abort, (seconds,))

    try:
        func()
    except thread_finished:
        print  "Timeout"
        return

ftimed (test, 30)
print "Script finished"

  It presently generates the following output:
$ python ./testthread.py
HELLO 0
HELLO 1
HELLO 2
HELLO 3
HELLO 4
HELLO 5
HELLO 6
HELLO 7
HELLO 8
HELLO 9
HELLO 10
HELLO 11
HELLO 12
HELLO 13
HELLO 14
HELLO 15
HELLO 16
HELLO 17
HELLO 18
HELLO 19
HELLO 20
HELLO 21
HELLO 22
HELLO 23
HELLO 24
HELLO 25
HELLO 26
HELLO 27
HELLO 28
HELLO 29
script run time exceeded max_run_time of 30 seconds.
Unhandled exception in thread started by <function abort at 0x009CEF30>
Traceback (most recent call last):
  File "./testthread.py", line 10, in abort
    raise thread_finished
MAX RUN TIME EXCEEDED!
HELLO 30
HELLO 31
HELLO 32
....



Thanks in advance:
Michael Yanowitz




From emin.shopper at gmail.com  Thu Jan  4 15:26:00 2007
From: emin.shopper at gmail.com (Emin)
Date: 4 Jan 2007 12:26:00 -0800
Subject: bug in copy.deepcopy or in getattr or in my understanding?
Message-ID: <1167942359.246311.80700@s34g2000cwa.googlegroups.com>

Dear experts,

I got some unexpected behavior in getattr and copy.deepcopy (see
transcript below). I'm not sure if this is actually a bug in
copy.deepcopy or if I'm doing something too magical with getattr.
Comments would be appreciated.

Thanks,
-Emin

#########  Transcript follows ##################


Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

>>> # THE FOLLOWING BREAKS
>>> class a:
... 	def foo(self):
... 		print 'hi'
...
>>> class b(a):
... 	def __init__(self):
... 		self.y = getattr(self,'foo')
...
>>> c = b()
>>> import copy
>>> copy.deepcopy(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "c:\Python25\lib\copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "c:\Python25\lib\copy.py", line 291, in _deepcopy_inst
    state = deepcopy(state, memo)
  File "c:\Python25\lib\copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "c:\Python25\lib\copy.py", line 254, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "c:\Python25\lib\copy.py", line 189, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "c:\Python25\lib\copy.py", line 322, in _reconstruct
    y = callable(*args)
  File "c:\Python25\lib\copy_reg.py", line 92, in __newobj__
    return cls.__new__(cls, *args)
TypeError: instancemethod expected at least 2 arguments, got 0
>>> # THE FOLLOWING WORKS
>>> class b(a):
... 	def __init__(self):
... 		self.x = self.__class__.__bases__[0].__dict__['foo']
... 
>>> c=b()
>>> copy.deepcopy(c)
<__main__.b instance at 0x00EADE18>



From sjdevnull at yahoo.com  Thu Jan 25 00:47:27 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 24 Jan 2007 21:47:27 -0800
Subject: ctypes: Setting callback functions in C libraries
Message-ID: <1169704047.486695.157820@l53g2000cwa.googlegroups.com>

Hey,

I'm trying to wrap GNU readline with ctypes (the Python readline
library doesn't support the callback interface), but I can't figure out
how to set values to a variable inside the library.  This is Python 2.5
on Linux.  Here's what I have so far--if you comment out the memmove
call (3 lines) it works as expected:

# START
#!/usr/local/bin/python2.5
import ctypes

ctypes.cdll.LoadLibrary("libcurses.so")#, mode=ctypes.RTLD_GLOBAL)
ctypes.CDLL("libcurses.so", mode=ctypes.RTLD_GLOBAL)
ctypes.cdll.LoadLibrary("libreadline.so")
readline = ctypes.CDLL("libreadline.so")

RL_COMPLETION_FUNC_T =
ctypes.CFUNCTYPE(ctypes.POINTER(ctypes.c_char_p),
        ctypes.c_char_p, ctypes.c_int, ctypes.c_int)
RL_LINE_BUFFER = ctypes.c_char_p.in_dll(readline, "rl_line_buffer")
RL_ATTEMPTED_COMPLETION_FUNCTION =
RL_COMPLETION_FUNC_T.in_dll(readline,

"rl_attempted_completion_function")

def our_complete(text, start, end):
    print "Test", text, start, end
    rv = None
    arrtype = ctypes.c_char_p*4
    globals()["rv"] = arrtype("hello", "hatpin", "hammer", None)
    globals()["crv"]=ctypes.cast(rv, ctypes.POINTER(ctypes.c_char_p))
    return rv
ourfunc = RL_COMPLETION_FUNC_T(our_complete)

_readline = readline.readline
_readline.argtypes = [ctypes.c_char_p]
_readline.restype = ctypes.c_char_p

ctypes.memmove(ctypes.addressof(RL_ATTEMPTED_COMPLETION_FUNCTION),
               ctypes.addressof(ourfunc),
               4)
line = _readline("Input: ")
print "INPUT was: ", line
#END

I need to assign ourfunc to RL_ATTEMPTED_COMPLETION_FUNCTION, but
obviously simple assignment rebinds the name rather than assigning it
to the C variable.

Using ctypes.memmove to overwrite it(as I have here) will run the
function but segfault when ourfunc goes to return (poking around with
the debugger shows it's dying in ctypes' callbacks.c at line 216, "keep
= setfunc(mem, result, 0);" because setfunc is NULL).  I'm not entirely
sure that's not because of some error in the prototyping or restype
setting rather than as a result of memmove, but the memmove seems
sketchy enough (only sets the function pointer itself presumably, not
anything that ctypes wrappers need) that I'm looking for a better way
to do it.

As it is, returning rv directly or simply returning None causes the
same segfault.


Any ideas?

Thanks very much for your time!



From gagsl-py at yahoo.com.ar  Fri Jan  5 15:49:48 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 05 Jan 2007 17:49:48 -0300
Subject: strange for loop construct
In-Reply-To: <1168029548.217679.251230@q40g2000cwq.googlegroups.com>
References: <1168029548.217679.251230@q40g2000cwq.googlegroups.com>
Message-ID: <7.0.1.0.0.20070105174716.03dee1e0@yahoo.com.ar>

At Friday 5/1/2007 17:39, Sardaukary at gmail.com wrote:

>wordfreq = [wordlist.count(p) for p in wordlist]
>
>I would expect
>
>for p in wordlist:
>     wordfreq.append(wordlist.count(p))
>
>
>I didn't know you could have an expression in the same line.

That's known as a "list comprehension" and is roughly equivalent to 
your code. Section 5 of the tutorial covers them. 
http://docs.python.org/tut/node7.html


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From skip at pobox.com  Wed Jan 24 07:12:40 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 24 Jan 2007 06:12:40 -0600
Subject: easy_install pylons failure - www.myghty.org unavailable
In-Reply-To: <ep6llk$nn1$1@sea.gmane.org>
References: <17846.54389.27457.383902@montanaro.dyndns.org>
	<ep6la3$mrh$1@sea.gmane.org> <ep6llk$nn1$1@sea.gmane.org>
Message-ID: <17847.19768.794607.756945@montanaro.dyndns.org>

Robert,

Thanks, I passed the contents of this thread along to distutils-sig.
Hopefully the list moderator is awake, as I'm not subscribed there... ;-)

Skip



From ajdeshpande at gmail.com  Wed Jan 31 12:00:46 2007
From: ajdeshpande at gmail.com (Analog Kid)
Date: Wed, 31 Jan 2007 22:30:46 +0530
Subject: Python module for the IPod shuffle ...
Message-ID: <4ccf86300701310900g2b642847s5d0dab31857f42a6@mail.gmail.com>

Hi all:
Im looking for a python module thatll let me do simple reads/writes from and
to an iPod shuffle similar to iTunes ... I read about the gPod module ...
but Im not sure whether it will work in Windows ...

Any help is greatly appreciated.

Thanks in advance ...
-Ajay
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070131/ed8f04c3/attachment.html>

From paallen at attglobal.net  Mon Jan  8 12:22:32 2007
From: paallen at attglobal.net (PAllen)
Date: 8 Jan 2007 09:22:32 -0800
Subject: A Good Intro to wxpython/PostgreSQL Applications?
Message-ID: <1168276952.498242.78120@v33g2000cwv.googlegroups.com>

Hi all,

I am trying to get rid of a few of my old MS Access applications and
move them to PostgreSQL and Python/wxpython.  Does anyone have any
suggestions on the easiest way to learn to program small database
applications with python & wxpython?  Does anyone have a few small
examples at least?

I will mainly need forms with/without subforms for viewing and
inserting data into the database.  Nothing too complicated to get
started.

thanks,

Phillip Allen



From Roka100 at gmail.com  Wed Jan 31 23:59:59 2007
From: Roka100 at gmail.com (Jia Lu)
Date: 31 Jan 2007 20:59:59 -0800
Subject: Can I import a file without file extension .py?
Message-ID: <1170305999.001998.251390@m58g2000cwm.googlegroups.com>

Hi all
 I wonder if I can import a file with other file extensions ?

 Can I do that only with python?

 Thank you

Jia Lu



From aspmanualator_1234567890 at yahoo.com  Wed Jan 10 01:16:48 2007
From: aspmanualator_1234567890 at yahoo.com (Asper Faner)
Date: 9 Jan 2007 22:16:48 -0800
Subject: "tkinter module not found" please help
In-Reply-To: <1168400177.167870.61900@i56g2000hsf.googlegroups.com>
References: <1168400177.167870.61900@i56g2000hsf.googlegroups.com>
Message-ID: <1168409808.203690.186240@o58g2000hsb.googlegroups.com>


notsonic... at yahoo.com wrote:
> I'm trying to install python2.5 on my computer(os Fedora 5). My problem
> is that I'm unable to get the tkinter module loaded into python. I've
> tried the solution here:"wiki.python.org/moin/TkInter" but am unsure as
> how to modify my setup.py script. I have installed the latest versions
> of tcl/tk (8.4.14) twice as well as installing python again. Everything
> is installed in the default location but still no luck.  Does anyone
> have any ideas? Thank you.

Compatibility is needed, Fed5 doesn't go with Py2.5, you try
reinstalling by yummie or from add&remove



From paul at boddie.org.uk  Fri Jan 26 13:53:16 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 26 Jan 2007 10:53:16 -0800
Subject: Handling empty form fields in CGI
In-Reply-To: <mailman.3207.1169834026.32031.python-list@python.org>
References: <mailman.3207.1169834026.32031.python-list@python.org>
Message-ID: <1169837596.200333.94360@s48g2000cws.googlegroups.com>

Christopher Mocock wrote:
>
> Bit of a python newbie so need a little help with a CGI script I'm
> trying to write. I've got it working fine as long as the fields of the
> form are filled in correctly, however I need to be able to accept blank
> entries. Therefore I want to convert any empty entries to an empty string.

[...]

> form = cgi.FieldStorage()

Try replacing this with...

form = cgi.FieldStorage(keep_blank_values=1)

Paul



From nospam at domain.tld  Thu Jan 25 01:50:06 2007
From: nospam at domain.tld (Stephan Kuhagen)
Date: Thu, 25 Jan 2007 07:50:06 +0100
Subject: Python does not play well with others
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<xqxirex3psq.fsf@cola3.ca.boeing.com>
Message-ID: <ep9juv$a77$1@kohl.informatik.uni-bremen.de>

Harry George wrote:

> Perl - excellent modules and bindings for just about everything you
...
> Java - a world of its own.  They reinvent the wheel instead of linking
...
> PHP - are we talking web scripts or serious programs?  Are you doing
...
> C - the portable assembler.  Solid, trusted, tunable performance,
...
> C++ - objects tacked onto C; but that didn't work so invent a whole
...
> Python - it just works.  Same scripts run on every platform.

The world has become very small these days...

Although I do not agree to the OP, because Python works for me very good on
different platforms (i.e. different Versions of Windows, Linux and Mac OS
X), there are some other old fellows around, which are very good for cross
platform programming. C and C++ are definitely *not* one of them, I would
say. True, you can write cross platform with them, but... I'm missing
especially some of the older cross platform languages in your list (I would
set Tcl at the top of the list, but Lisp and others will appear in such a
list also), which have grown and became mature over the years. Most cross
platform problems and others issues have been fixed and really worked out
in them. New kids on the block may be more dynamic (Python really is), but
they can learn much from the old guys. Sometimes one should have a look and
learn from still good working ancestors...

Regards
Stephan



From bdesth.quelquechose at free.quelquepart.fr  Thu Jan  4 05:44:16 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 04 Jan 2007 11:44:16 +0100
Subject: array of class / code optimization
In-Reply-To: <AOPmh.83$9v1.124@nntpserver.swip.net>
References: <mailman.2221.1167763760.32031.python-list@python.org>
	<AOPmh.83$9v1.124@nntpserver.swip.net>
Message-ID: <459cd45e$0$320$426a34cc@news.free.fr>

mm a ?crit :
> 
> Yes, it was the (), equivalent to thiks like new() create new object 
> from class xy.

Yeps. In Python there's no 'new' operator. Instead, classes are 
themselves 'callable' objects, acting as instance factory. It's very 
handy since it let's you replace a class with a factory function (or 
vice-versa) without impacting client code.

>>   s1.append(Word)
> 
> s1.append(Word())
> 
> But I was looking for a "struct" equivalent like in c/c++.

You can use a dict or a class.

> And/or "union". I can't find it.

What is your real use case ? Direct translation from one language to 
another usually leads to code that's both non-idiomatic and inefficient. 
IOW, don't try to write C++ in Python.

> Maybe you know a source (URL) "Python for c/c++ programmers" or things 
> like that.

Not really, but quite a lot of Python programmers come from the C++ 
world. FWIW, I'd say that the official Python tutorial should be enough 
to get you started. Then, and if you're at ease with OO, you may want to 
have a look at more advanced stuff like special methods and attributes, 
decriptors and metaclasses (here again documented on python.org).


From chizzua at gmail.com  Fri Jan  5 15:21:57 2007
From: chizzua at gmail.com (jbchua)
Date: 5 Jan 2007 12:21:57 -0800
Subject: Learning to program in Python
Message-ID: <1168028517.005902.172880@11g2000cwr.googlegroups.com>

Hello everybody.

I am an Electrical Engineering major and have dabbled in several
languages such as Python, C, and Java in my spare time because of my
interest in programming. However, I have not done any practical
programming because I have no idea where to get started. I taught
myself these languages basically by e-tutorials and books. This makes
me feel as if I don't really know how to implement these languages.
Does anybody have any advice on where to start applying my limited
knowledge practically in order to advance my learning?



From bthom at cs.hmc.edu  Thu Jan 11 16:33:59 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Thu, 11 Jan 2007 13:33:59 -0800
Subject: Pythonic A*-Algorithm
In-Reply-To: <200701112201.37129.w.richert@gmx.net>
References: <200701112201.37129.w.richert@gmx.net>
Message-ID: <77C074CD-2F46-482E-A6BE-29B3A4297374@cs.hmc.edu>

Willi,

Maybe you could use something from the Python AIMA code? http:// 
aima.cs.berkeley.edu/code.html

On Jan 11, 2007, at 1:01 PM, Willi Richert wrote:

> Hi,
>
> I'm looking for an A* implementation in Python (at least some  
> wrapper around a
> C lib). So far I've only found http://arainyday.se/projects/python/ 
> AStar/
> which looks not so promising.
>
> http://wiki.python.org/moin/PythonGraphApi lists all major  
> available graph
> libraries in Python, hoping to find a path to some standard Python  
> graph
> library (as DBAPI). But none of them seems to have a decent A*- 
> implementation
> (at least with Fibonacci-heap, as pqueue is supposed to be).
>
> I know I could implement it myself as it is not that complicated,  
> but I would
> rather like to align my project to some already existing and well  
> established
> graph library containing A*.
>
> Thanks,
> wr
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From deets at nospam.web.de  Fri Jan  5 08:58:11 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 05 Jan 2007 14:58:11 +0100
Subject: program deployment
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
Message-ID: <5073rjF1ek2b1U1@mid.uni-berlin.de>

king kikapu wrote:

>> Python code is normally deployed as straight source code.
> 
> But isn't this a problem of its own ?? I mean, many people do not feel
> good if the know that their source code is lying around on other
> machines...

This has been discussed a bazillion times on this list - the summary is (at
least from my POV):

 - it is possible to decompyle python pretty easy. So, spare yourself the
hassle just distributing only the pyc

 - it is easy enough to hack even C-written apps, if anything is _worth_
being hacked, it will be hacked

 - 99% of all code isn't worth being hacked or ripped. Really. Even though
the result of cobbling together lots of unimaginative code might be
impressive, there are only very few areas of coding (like e.g.
sophisticated compression algorithms and the like) that are worth ripping -
the rest is bound to be runnable in one app only anyway, as it is coupled
closely

 - if you have something you really, really, really need to be as secure as
possible, go use a remote service - otherwise, it _will_ be compromised.


Diez


From richfahey at gmail.com  Thu Jan 11 14:10:37 2007
From: richfahey at gmail.com (Rich)
Date: 11 Jan 2007 11:10:37 -0800
Subject: passing a variable to an external program
Message-ID: <1168542633.290682.267570@77g2000hsv.googlegroups.com>

I want to run an external program using os.system() but I want to
include a variable in the middle of the command line.

An example of the type of thing I want to be able to do:
pathname = os.path.dirname(sys.argv[0])
os.system('cscript /nologo ' + pathname + '\test.vbs')

When I run this, everything after pathname + seems to be ignored.  Is
this just incorrect syntax or am I trying to do something fundamentally
wrong?  Is there a better way to do something like this?  I'm trying to
move from perl to python and this is my first attempt at python.



From jwaixs at gmail.com  Thu Jan 11 14:35:30 2007
From: jwaixs at gmail.com (Noud Aldenhoven)
Date: Thu, 11 Jan 2007 19:35:30 +0000
Subject: Rational Numbers
Message-ID: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>

Hello,

When I was programming in a mathematical project I began to wonder if python
supports rational numbers[1]. In a language like magma[2] it's not such a
problem. Does python supports something simular?

Greetings,

Noud Aldenhoven

-- 
<:3 )~

[1] http://en.wikipedia.org/wiki/Rational_number
[2] http://www.math.uiuc.edu/Software/magma/text283.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070111/1c9a5982/attachment.html>

From hrvoje.niksic at avl.com  Tue Jan 23 10:36:59 2007
From: hrvoje.niksic at avl.com (Hrvoje =?UTF-8?Q?Nik=C5=A1i=C4=87?=)
Date: Tue, 23 Jan 2007 16:36:59 +0100
Subject: Py_DECREF after an exception
Message-ID: <1169566619.5169.67.camel@localhost>

I'm wondering what happens with the exception info during object cleanup
immediately after an exception is thrown.  Consider this code:

  PyObject *args = PyBuild_Value("(O(O){})", name, parent);
  if (!args)
    return NULL;
  PyObject *val = some_python_func(x, args, NULL);
  Py_DECREF(args);
  if (!val)
    return NULL;

The idea is to propagate the exception possibly raised by
some_python_func and at the same time avoid leaking memory.  But
Py_DECREF can cause arbitrary Python code to get executed, including the
code that eventually ends up calling PyErr_Clear when it wants to ignore
some unrelated exception.  This could cause exception information to be
forgotten.

Is there a way around this, or is there a reason why this is not a
problem in practice?





From codecraig at gmail.com  Wed Jan 24 12:21:04 2007
From: codecraig at gmail.com (abcd)
Date: 24 Jan 2007 09:21:04 -0800
Subject: Thoughts on using isinstance
In-Reply-To: <pan.2007.01.24.16.49.21.555688@gmx.net>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<mailman.3077.1169645738.32031.python-list@python.org>
	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>
	<mailman.3087.1169652310.32031.python-list@python.org>
	<1169656371.689791.216360@v33g2000cwv.googlegroups.com>
	<pan.2007.01.24.16.49.21.555688@gmx.net>
Message-ID: <1169659264.605545.211000@s48g2000cws.googlegroups.com>

>Yes because usually you don't expect a list or dictionary but some object
> that *acts* like a list or dictionary.  Or you even expect just some
> aspects of the type's behavior.  For example that it is something you can
> iterate over.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

good point.  is there place that documents what methods/attrs I should
check for on an object?  for example, if its a list that I expect I
should verify the object that is passed in has a ??? function? etc.

thanks.



From kylotan at gmail.com  Tue Jan  2 06:08:03 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 2 Jan 2007 03:08:03 -0800
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <etvgp25hjdju857j8o4spsj2jictceht6j@4ax.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<1167543262.361311.123700@v33g2000cwv.googlegroups.com>
	<etvgp25hjdju857j8o4spsj2jictceht6j@4ax.com>
Message-ID: <1167736083.756075.273450@s34g2000cwa.googlegroups.com>

Tom Plunket wrote:
> vbgunz wrote:

> > Some if not most python documentation assumes Python is on the path...
>
> Really?  I must live in different places in the docs, but I can't recall
> encountering any such documentation.

I have posted a few examples above: "Installing Python Modules"
(http://python.org/doc/2.2.3/inst/inst.html) is a key example. 3rd
party packages often expect you to type "python setup.py install".
Setuptools/easyinstall will give you an 'easy_install' script, but then
notes that you have to manually fix up the PATH yourself.

> Users who want it in their paths are certainly capable of putting it
> there.

By that logic, users who want Python are probably capable of unzipping
the archive and putting it somewhere semi-suitable. So why provide an
installer?

If you're going to provide an installer, it should do the whole job,
and get Python in a state that is reasonably consistent across all
platforms, where practical. Adding to the PATH variable isn't
impractical.

> I am in the camp that detests apps that automatically install
> tons of crap everywhere without prompts.

Why use hyperbole here? Is 13 or 14 bytes optionally added to a single
environment variable "tons of crap"? And did anybody insist that the
installer would have no prompts?

> Certainly, though, the
> suggestion that one pane in the installer offer to put it in the path
> would leave the default as it is today ("don't edit PATH"), though,
> right?  Doesn't make a whole lot of sense to add a new option and
> default it to something completely different from the old behavior, does
> it?

I have no problem with something being configurable, but I do have a
problem with Windows users being forced to jump through unnecessary
hoops that Unix and MacOS users don't have to endure. And I think the
default should be to edit the PATH and allow you to explicitly disallow
this: changing from the current behaviour is the right thing to do
because the current behaviour is wrong, in terms of cross-platform
compatibility and usability.

-- 
Ben Sizer



From manouchk at gmail.com  Fri Jan 19 12:07:23 2007
From: manouchk at gmail.com (manouchk)
Date: 19 Jan 2007 09:07:23 -0800
Subject: nsis and command-line argument
In-Reply-To: <1169138095.499650.8530@m58g2000cwm.googlegroups.com>
References: <1169138095.499650.8530@m58g2000cwm.googlegroups.com>
Message-ID: <1169226443.365409.103280@v45g2000cwv.googlegroups.com>


manouchk wrote:
> Hi,
>
> is there a standart way to prepare a single exe with nsis that pass the
> command line to an exe created by py2exe on windows?
>
> py2exe allows to prepare an exe that get the command-line but needs
> some lib file so that it is not so elegant to ditribute. I tried a
> simple setup.nsis script to prepare a single file exe with works fine
> except that it does get the command-line.
>
> Is there a way do get the command line with the setup.nsis script?
> or any other simple method ?

Answering myself, well with NSIS it is not supported as written there :
http://www.py2exe.org/index.cgi/SingleFileExecutable

I'm looking for the py2exe option that allows that, I guess it could be
--bundle 1. It does not seem to be documented but I will try that.



From george.sakkis at gmail.com  Sun Jan 21 16:32:19 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 21 Jan 2007 13:32:19 -0800
Subject: mmap caching
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>
	<slrner7h27.d8g.nick@irishsea.home.craig-wood.com>
Message-ID: <1169415139.515834.233700@a75g2000cwd.googlegroups.com>

Nick Craig-Wood wrote:

> George Sakkis <george.sakkis at gmail.com> wrote:
> >  I've been trying to track down a memory leak (which I initially
> >  attributed erroneously to numpy) and it turns out to be caused by a
> >  memory mapped file. It seems that mmap caches without limit the chunks
> >  it reads, as the memory usage grows to several hundreds MBs according
> >  to the Windows task manager before it dies with a MemoryError. I'm
> >  positive that these chunks are not referenced anywhere else; in fact if
> >  I change the mmap object to a normal file, memory usage remains
> >  constant. The documentation of mmap doesn't mention anything about
> >  this. Can the caching strategy be modified at the user level ?
>
> I'm not familiar with mmap() on windows, but assuming it works the
> same way as unix...
>
> The point of mmap() is to map files into memory.  It is completely up
> to the OS to bring pages into memory for you to read / write to, and
> completely up to the OS to get rid of them again.
>
> What you would expect is that the file is demand paged into memory as
> you access bits of it.  These pages will remain in memory until the OS
> feels some memory pressure when the pages will be written out if dirty
> and then dropped.
>
> The OS will try to keep hold of pages as long as possible just in case
> you need them again.  The pages dropped should be the least recently
> used pages.
>
> I wouldn't have expected a MemoryError though...
>
> Did you do mmap.flush() after writing?

The file is written once and then opened as read-only, there's no
flushing. So if caching is completely up to the OS, I take it that my
options are either (1) modify my algorithms so that they work in
fixed-size batches instead of arbitrarily long sequences or (2)
implement my own memory-mapping scheme to fit my algorithms. I guess
(1) would be the less trouble overall, or is there a way to give a hint
to the OS on how large cache can it use ?

George



From martin at v.loewis.de  Tue Jan  9 15:46:15 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 09 Jan 2007 21:46:15 +0100
Subject: distutils and ctypes
In-Reply-To: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>
References: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>
Message-ID: <45A3FF17.2070509@v.loewis.de>

jtravs at gmail.com schrieb:
> I suspect that I'm doing something stupid, I would like some other
> opinions though.
> I'm getting started with ctypes and am trying to use distutils to help
> build my module. At the moment I simply want distutils to build a
> shared c library (not a python extension!). Under linux, the following
> works, under windows xp id doesn't (which I guess is obvious, but the
> linux success lead me on).

Not sure it's stupid, but I wonder why you want to use ctypes. What's
wrong with extension modules?

Regards,
Martin


From bdesth.quelquechose at free.quelquepart.fr  Wed Jan 24 15:15:52 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 24 Jan 2007 21:15:52 +0100
Subject: Thoughts on using isinstance
In-Reply-To: <1169656371.689791.216360@v33g2000cwv.googlegroups.com>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<mailman.3077.1169645738.32031.python-list@python.org>
	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>
	<mailman.3087.1169652310.32031.python-list@python.org>
	<1169656371.689791.216360@v33g2000cwv.googlegroups.com>
Message-ID: <45b7b7ba$0$391$426a74cc@news.free.fr>

abcd a ?crit :
> Well my example function was simply taking a string and printing, but
> most of my cases would be expecting a list, dictionary or some other
> custom object.  Still propose not to validate the type of data being
> passed in?

Yes - unless you have a *very* compelling reason to do otherwise.


From webb.sprague at gmail.com  Thu Jan  4 20:01:03 2007
From: webb.sprague at gmail.com (_)
Date: 4 Jan 2007 17:01:03 -0800
Subject: Turn off line wrap for lists?
Message-ID: <1167958863.538291.60820@s34g2000cwa.googlegroups.com>

(I did google for this, I promise)

How do I get python NOT to insert newlines into string representations
of lists when I do something like this:

strCollector += "%s" % (['a', 'list', 'with', 'lots', 'of', 'elements']
* 100)

?

I would like to set a default never to do this, if possible. (Never mix
formatting with display, or tequila with bourbon -- bad, bad, bad!)

FYI I am using this to export data into tab delimited format, so the
lines can be as long as they need to be, but a newline means a new
record.

FYI (2), this is in web application too, so I am afraid I might have to
set the default in a bunch of different modules.

TIA



From rschroev_nospam_ml at fastmail.fm  Wed Jan  3 18:45:11 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Wed, 03 Jan 2007 23:45:11 GMT
Subject: Unsubscribing from the list
In-Reply-To: <mailman.2253.1167856980.32031.python-list@python.org>
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>	<ene064$bm5$1@sea.gmane.org>	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>	<enghj3$qhf$1@sea.gmane.org>	<880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com>	<engs22$6u3$1@sea.gmane.org>	<880dece00701031033o151cbe76h92a5a5adde51db90@mail.gmail.com>
	<mailman.2253.1167856980.32031.python-list@python.org>
Message-ID: <beXmh.271710$bW2.5771379@phobos.telenet-ops.be>

Robert Kern schreef:
> Dotan Cohen wrote:
>> On 03/01/07, Fredrik Lundh <fredrik at pythonware.com> wrote:
>>> Robert provided *detailed* instructions, which you ignored.   I quoted
>>> the same instructions in my reply, which you also ignored.  the sentence
>>> after the one where you stopped reading also tells you what to do.  one
>>> might suspect that you don't really want to unsubscribe from this list...
>> I didn't ignore his instructions. I went to the page, and found what I
>> was looking for. I told him thank you, and explained why I didn't find
>> it the first time.
> 
> He misunderstood you (as I nearly did, too). The way you phrased "decided that
> there was no futher interest on the page for me" is somewhat ambiguous: it can
> seem like it refers to the second time, not the first.

I almost misunderstood too. Dotan is not the only one to be somewhat 
confusing though: I've always thought that the way Mailman formulates 
that page is confusing. It always seems to me that "(The subcribers list 
is only available to the list administrator.)" seems to cover the whole 
"Python-list Subscribers" section instead of just the first part of it.

I think this layout would be much clearer (although this is actually a 
Mailman issue, not a Python issue):


Python-list Subscribers

Unsubscribe:

To unsubscribe from Python-list, get a password reminder, or change your 
subscription options enter your subscription email address: _______ 
[Unsubscribe or edit options]

If you leave the field blank, you will be prompted for your email address

Subscriber list (only available to the list administrator):

Enter your admin address and password to visit the subscribers list:

Admin address: _______ Password: _______ [Visit Subscriber List[


-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From no-spam at no-spam-no-spam.invalid  Thu Jan 18 04:13:17 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 18 Jan 2007 10:13:17 +0100
Subject: Making a simple script standalone
In-Reply-To: <mailman.2856.1169075613.32031.python-list@python.org>
References: <5d1084-5j7.ln1@whisper.very.softly>	<mailman.2820.1169032834.32031.python-list@python.org>	<ek8284-od9.ln1@whisper.very.softly>
	<mailman.2856.1169075613.32031.python-list@python.org>
Message-ID: <eondm3$ouo$1@news.albasani.net>

Gabriel Genellina wrote:
> At Wednesday 17/1/2007 16:05, Rikishi 42 wrote:
> 
>> >>What I want to do is to compile/bundle/prepare/whatever_term a simple
>> >>Python script for deployment on a Windows machine. Installing Python
>> >>itself on that machine, is not an option. Ideally I would like to 
>> obtain
>> >>a single executable file, but a script+runtime is acceptable.
>> >
>> > distutils + py2exe
>>
>> Tried that, just after asking here.
>> A bit messy (poor docs) and a very bloated result.
> 
> Consider that, at a bare minimum, you need to include python25.dll wich 
> is rather large, and transitive module imports can lead to a large 
> library.zip too.
> Different "bundlers" may be more or less convenient, have more or less 
> documentation, easier or harder to use, but they all make comparable 
> file sizes; no one is so dumb to include all the scripts reachable along 
> the PYTHONPATH, and on the other hand, if it included too few files your 
> script might fail when it can't import a needed module.
> See http://mail.python.org/pipermail/python-list/2005-August/336851.html 
> for a related issue.
> If you're going to try different alternatives, posting your findings at 
> the end would be a good thing.
> 

stay with py23 for "a script" (and more) and make <700kB 
independent distros - UPX and 7zip involved:

http://groups.google.com/group/comp.lang.python/msg/edf469a1b3dc3802


From fccoelho at gmail.com  Wed Jan 24 15:57:03 2007
From: fccoelho at gmail.com (Flavio)
Date: 24 Jan 2007 12:57:03 -0800
Subject: raise UnicodeError, "label too long"
Message-ID: <1169672223.231030.262610@l53g2000cwa.googlegroups.com>

Hi I am havin a problem with urllib2.urlopen.

I get this error when I try to pass a unicode to it.

raise UnicodeError, "label too long"

is this problem avoidable? no browser or programs such as wget seem to
have a problem with these strings.



From jorge.vargas at gmail.com  Fri Jan  5 16:06:18 2007
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Fri, 5 Jan 2007 17:06:18 -0400
Subject: MySQLdb windows binaries for Python 2.5?? Yes,
	but from a World of Warcraft guild.
In-Reply-To: <1166144355.616642.127080@n67g2000cwd.googlegroups.com>
References: <1162408100.985370.148650@m7g2000cwm.googlegroups.com>
	<1163238145.257490.144410@b28g2000cwb.googlegroups.com>
	<mailman.2093.1163244341.11739.python-list@python.org>
	<Fgkgh.9311$hI.6215@newssvr11.news.prodigy.net>
	<Ulmgh.70$u%4.58@newsfe04.lga>
	<1166144355.616642.127080@n67g2000cwd.googlegroups.com>
Message-ID: <32822fe60701051306o2a4d91beycc919d1d21d6e495@mail.gmail.com>

On 14 Dec 2006 16:59:15 -0800, Fuzzyman <fuzzyman at gmail.com> wrote:
>
> johnf wrote:
> > >>
> > >> If you search the Help Forum of the MySQLdb project on SourceForge, you
> > >> will find a couple of people who have successfully built MySQLdb on
> > >> Windows for 2.5, and are willing to share their installers.
> > >> That's how I got my binaries.
well it seems noone has talk to Andy directly I build the one for
1.2.1_p2 for python2.4 ones it was done all I had to do is email Andy
and he posted it without problems

the biggest issue here is that building that driver in windows is a
pain, you need mysql headers, python headers and microsoft compilers a
total of around 2Gb, plus some bug I found that ended up being an
error in between the setup.py file and windows commandline.

also windows lacks the mysql-config tool which means you need to find
out a lot of flags which on *NIX are fill in automagically.

ahh did I mention you need to patch distutils to work with the "free
windows" compiler because the official windows python builds agains
the non-free MS compiler.

> > > This, apparently, is the extent of current Python support for MySQL.
> > > Want to install that executable, as root, on your production machines?
> > >
> > > This is embarassing for the Python community.  Perl and PHP come
> > > with MySQL support built in.  Python is out to lunch on this.
> > >
> > I couldn't disagree more.  That fact that no Database drivers are built-in
> > makes Python stronger - allowing Python to access any Data Engine that
> > supports DBI 2.0.  Of course I'm not including pickle in my assessment.
> >
actually in this case I disagree having this driver as buildin will
take much of the pain out of any user who tries to compile this
driver, it will also help in standarizing the drivers for example in
postgre there is more then one, I think we will be better off with
just one driver, that is one DBI2.0 driver, there are some experiments
outthere which make it more "pythonic" which shouldn't be excluded.


From tactics40 at gmail.com  Mon Jan 22 19:30:44 2007
From: tactics40 at gmail.com (tac-tics)
Date: 22 Jan 2007 16:30:44 -0800
Subject: arrow keys don't work
In-Reply-To: <1169511711.594390.167630@11g2000cwr.googlegroups.com>
References: <1169506381.452422.179070@11g2000cwr.googlegroups.com>
	<pan.2007.01.23.00.14.29.144841@REMOVEME.cybersource.com.au>
	<1169511711.594390.167630@11g2000cwr.googlegroups.com>
Message-ID: <1169512244.036184.175650@38g2000cwa.googlegroups.com>

It looks like I got readline working. Thanks for the help!



From pink at odahoda.de  Wed Jan 31 08:02:33 2007
From: pink at odahoda.de (Benjamin Niemann)
Date: Wed, 31 Jan 2007 14:02:33 +0100
Subject: marshal.loads ValueError
References: <1170247461.799295.227550@a75g2000cwd.googlegroups.com>
Message-ID: <epq41g$ne6$1@online.de>

Hello,

abcd wrote:

> I have the following code which is sent over the wire as a string...
> 
> from time import time
> class Foo:
>     def go(self):
>         print "Time:", time()
> 
> 
> I get this code and store it as, "data"
> 
> data = receivePythonSource()
> 
> Then I try...
> 
> exec marshal.loads(data) in my_module.__dict__
> 
> However I get an error saying:
> ValueError: invalid literal for __float__: om time import time
> class Foo:
>     def go(self):
> 
> ....almost like when I try to marshal and exec it misses the first two
> characters, "fr" ...any ideas?

marshal is used to (de)serialize python objects from/to strings.
marshal.loads() tries to deserialize an encoded string back into a python
object - which does not make sense here.
What you probably want is:

exec data in my_module.__dict__


HTH

-- 
Benjamin Niemann
Email: pink at odahoda dot de
WWW: http://pink.odahoda.de/


From mark.m.mcmahon at gmail.com  Thu Jan 18 17:38:15 2007
From: mark.m.mcmahon at gmail.com (Mark)
Date: 18 Jan 2007 14:38:15 -0800
Subject: How to write code to get focuse the application which is open
	from server
References: <1168143871.536432.252010@v33g2000cwv.googlegroups.com>
	<45a0dae2$0$8948$4c368faf@roadrunner.com>
	<1168837895.073936.270330@11g2000cwr.googlegroups.com>
	<m%Oqh.10311$pQ3.45@newsread4.news.pas.earthlink.net>
	<1168887206.135633.182600@s34g2000cwa.googlegroups.com>
Message-ID: <1169159895.511475.301830@v45g2000cwv.googlegroups.com>

Hi,

There are better places to find me then on comp.lang.python (just too
much traffic for me)
pywinauto forums: http://forums.openqa.org/forum.jspa?forumID=15
or subscribe pywinauto mailing list:
https://lists.sourceforge.net/lists/listinfo/pywinauto-users


vithi wrote:
<SNIP>
> MatchError: Could not find 'Print' in '['', u'Transparent Windows
> Client0', u'Transparent Windows Client2', u'Transparent Windows
> Client1', u'Print - \\\\Remote', u'Transparent Windows Client', u'Print
> - \\\\RemoteTransparent Windows Client']'
>
> This is the code
> import sys
> import time
> import application
> app = application.Application()
> qi=app.window_(title_re = ".*ArcView.*")
> time.sleep(2)
> qi.TypeKeys("%FP")
> time.sleep(2)
>
> app.Print.Ok.CloseClick()
>
>
My guess is that problem above is that teh title of the window is
u"Print - \\Remote", and "Print"  is not enough information for
pywinauto to go on.

I suggest you replace the last line with one of the following...
    app.PrintRemote.Ok.CloseClick()
    app.window_(title_re = "Print - .*").Ok.CloseClick()

Someone also was wondering why they do not have to call
Application.Start() or Application.Connect() explicitly - that is
because the first call to app.window_() will initialize the application
appropriately.  The reason for this is that most usages ended up being
a) Connect to a window with specific title, then use that window in the
next line - so I was trying to avoid duplication.

Thanks
  Mark



From mail at microcorp.co.za  Fri Jan 12 00:09:44 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 12 Jan 2007 07:09:44 +0200
Subject: Urgent Openings with the World's Leading Software Company !!!
References: <1168499359.596195.286240@77g2000hsv.googlegroups.com>
Message-ID: <005501c73607$e0246120$03000080@hendrik>


"Software Hiring" <vamsi.hr.rec at gmail.com> wrote:


> If you're interested in relocating to India for such a good
> opportunity and be a part of the World's Best Software Company and if
> you have good skill sets  in:
> 
> C, C++, C#, Java (for .Net Platform or Visual Studio)
> 
> OR
> 
> C, C++, Java, Product Development (for MS RFID Infrastructure
> PathFinder - Adapters)
> 
> OR
> 
> C, C++, driver or kernel, Linux or Unix (for Windows Serviceability)
> 

not much to do with python....

*closes eyes, and imagines the sing-song accent of the Indians
contrasting with his guttural Afrikaans accent *

*shudders*

I think I will give this one a miss - it would be worse than
relocating to Wales...

- Hendrik



From skip at pobox.com  Mon Jan 15 10:13:17 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 15 Jan 2007 09:13:17 -0600
Subject: How naive is Python?
In-Reply-To: <1168848408.785931.285160@q2g2000cwa.googlegroups.com>
References: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>
	<mailman.2724.1168834095.32031.python-list@python.org>
	<1168848408.785931.285160@q2g2000cwa.googlegroups.com>
Message-ID: <17835.39437.115750.617750@montanaro.dyndns.org>


    John> Sorry, Skip, but I find that very hard to believe. The foo()
    John> function would take quadratic time if it were merely adding on
    John> pieces of constant size -- however len(str(i)) is not a constant,
    John> it is O(log10(i)), so the time should be
    John> super-quadratic.

Sorry, I should have pointed out that I'm using the latest version of
Python.  I believe += for strings has been optimized to simply extend s when
there is only a single reference to it.

Skip


From hg at nospam.org  Fri Jan  5 04:57:28 2007
From: hg at nospam.org (hg)
Date: Fri, 05 Jan 2007 10:57:28 +0100
Subject: importing / loading a module / class dynamically
References: <o1vnh.281$rv1.88@newsfe21.lga>
	<mailman.2329.1168015250.32031.python-list@python.org>
Message-ID: <Qrvnh.22242$Dy2.4262@newsfe20.lga>

Laszlo Nagy wrote:

> 
>> .../.../../plugin/name1/name1.py
>> ....
>> .../.../../plugin/namen/namen.py
>>
>>
>> I block at the beginning and tried this (test.py is a real file)
>>   
>>>>> s = 'test.py'
>>>>> eval ('import ' + s)
>>>>>         
> import test.py  # This is invalid
> import test # This MAY be valid
> import name1.name1 # Most probably this is what you want if you have the
> aforementioned directory stucture
> from name1 import name1 # Or this?
> 
> You must also:
> 
> 1. Have the 'plugin' dir in your sys.path
> 2. Have at least an empty plugin/name1/__init__.py file
> 
> Another alternative is to have plugins/__init__.py and do something like:
> 
> from plugins.name1 import name1
> 
> You should not overcomplicate things anyway. If you do not need these
> name1...namen directories for sure, then just drop them.
> 
> Hint: try this (untested)
> 
> import os
> fnames = os.listdir('plugins')
> for fname in fnames:
>     if os.path.isdir(fname):
>        root,ext = os.path.splitext(fname)
>        cmd = "from plugins.%s import %s" % (root,root)
>        print "I should eval this:",cmd
> 
> Best,
> 
>    Laszlo
> 
> 
>> Traceback (most recent call last):
>>   File "<pyshell#1>", line 1, in -toplevel-
>>     eval ('import ' + s)
>>   File "<string>", line 1
>>     import test.py
>>


Thanks,

What I am doing is adding plugin support to PyCrust ... so I'm looking for a
mechanism where anyone can develop a plugin and have it loaded by pycrust.

the .py was a typo 


why the "...Have at least an empty plugin/name1/__init__.py file..." ?

Thanks,

hg





From grahn+nntp at snipabacken.dyndns.org  Mon Jan 22 15:55:32 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 22 Jan 2007 20:55:32 GMT
Subject: Getting to an SSH account over a HTTP proxy
References: <mailman.2985.1169469575.32031.python-list@python.org>
	<51jt71F1k884hU1@mid.uni-berlin.de>
Message-ID: <slrnera43v.tcj.grahn+nntp@frailea.sa.invalid>

On Mon, 22 Jan 2007 14:40:49 +0100, Diez B. Roggisch <deets at nospam.web.de> wrote:
> BJ?rn Lindqvist wrote:
>
>> I want to use Python to connect to a SSH account over a HTTP proxy to
>> automate some operations. I thought paramiko would be able to do that,
>> but it can not (it seems).
>> 
>> Is there some other Python module that can do what I want?
>
> Is there anything that can do what you want? Last time I checked there is no
> such thing as SSH-over-HTTP. Are you sure that is possible?

I am pretty sure there is. Or at least TCP-over-HTTP, or IP-over-HTTP. An
acquaintance of mine used it to tonnel home through a corporate firewall. I
think -- I didn't want to know the details.

If you implement in the same way as ssh tunnels, the application doesn't
need to know anything about it -- you just talk to a TCP port on localhost.
Good for everyone involved.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From aboudouvas at panafonet.gr  Fri Jan  5 10:19:37 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 5 Jan 2007 07:19:37 -0800
Subject: program deployment
In-Reply-To: <12psqtppgi5cme6@corp.supernews.com>
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
	<12psqtppgi5cme6@corp.supernews.com>
Message-ID: <1168010377.179056.220500@s80g2000cwa.googlegroups.com>



> > Are they embarassed by their code?

hehehe...no, just worried about stealing their ideas...



From gheissenberger at gmail.com  Fri Jan 12 10:31:32 2007
From: gheissenberger at gmail.com (gheissenberger at gmail.com)
Date: 12 Jan 2007 07:31:32 -0800
Subject: Python nuube needs Unicode help
In-Reply-To: <50pldgF1gecd0U2@mid.uni-berlin.de>
References: <1168550894.155528.295700@p59g2000hsd.googlegroups.com>
	<eo7goj$n4s$03$1@news.t-online.com>
	<1168613067.354487.40840@51g2000cwl.googlegroups.com>
	<50pldgF1gecd0U2@mid.uni-berlin.de>
Message-ID: <1168615892.477387.176500@i15g2000cwa.googlegroups.com>

Diez, you are awesome! This works! Thank you so much!!! You are so
awesome!


Diez B. Roggisch wrote:
> gheissenberger at gmail.com wrote:
>
> > Can you attach files in this forum? Couldn't find the option. Oh well,
> > here's the file.
> >
> > #!/usr/bin/python
> > # Version: 1.1
> > # Author:  Steve Losh
> >
> > from sets import Set
> > from optparse import OptionParser
> > from xml.dom.minidom import parse
> >
> > AudioPath     = 'audio/'
> > DatafilePath  = 'utterances.trmxml'
> > CONFIDENCE_LOW  = None #'500'
> > CONFIDENCE_HIGH = None #'500'
> >
> > utterancesFile = None
> >
> >
> > class Utterance:
> >     def __init__(self, audio, grammarSet, text):
> >         self.audio      = audio
> >         self.grammarSet = grammarSet
> >         self.text       = text
> >
> >     def __str__(self):
> >         return "SWIrecAcousticStateReset\ntranscription " + self.text \
> >                 + "\nrecognize " + AudioPath + self.audio
>
> There your __str__-method is. self.text and self.audio come from the
> xml-parsing and are unicode objects - so they need to be encoded, like
> this:
>
> def __str__(self):
>     return "SWIrecAcousticStateReset\ntranscription " +
> self.text.encode('utf-8') + "\nrecognize " + AudioPath +
> self.audio.encode('utf-8')
> 
> 
> Diez



From sean at datafly.net  Sun Jan 21 21:47:53 2007
From: sean at datafly.net (Sean Schertell)
Date: Mon, 22 Jan 2007 11:47:53 +0900
Subject: PyMeld for html templates?
In-Reply-To: <1169241497.610167.130580@a75g2000cwd.googlegroups.com>
References: <mailman.2858.1169084154.32031.python-list@python.org>
	<1169241497.610167.130580@a75g2000cwd.googlegroups.com>
Message-ID: <69A8B843-8676-4498-AFD5-4E015E35CF20@datafly.net>

I'm trying to get PyMeld happening but I'm a bit stumped as to how to  
make it work with mod_python.

The pymeld docs show examples only for the Python command line  
interpreter and show using the print statement to output stuff. But  
using mod_python.apache, I think you need to use req.write(something)  
format. And of course, this fails when you feed it output from Meld.

Any tips?

Sean



On Jan 20, 2007, at 6:18 AM, Richie Hindle wrote:

> [Sean]
>> I wonder if anyone has any thoughts on PyMeld as a template
>> system for churning out general websites?
>
> I'm doing that (but then I would be wouldn't I? 8-)
> http://www.mandant.net is an example - the content of each page comes
> from a file containing just the content, the layout and sidebar are
> defined in a template HTML file, and the navigation is built by a
> Python script.  All that is pulled together using PyMeld into a set of
> HTML files and deployed to the web server (there's no need to it on  
> the
> fly for that site, but you certainly could).
>
>> I want for a URI request to mysite.com/info
>> to pull in a layout.html template which will in turn be populated by
>> the info.html template. [...]  how about PyMeld, any ideas on how
>> to do it or whether it will even work as I've described?
>
> You'd do something like this:
>
> from PyMeld import Meld
>
> LAYOUT = """<html><head><title id='title'>The Title</title></head>
> <body><div id='info'>The page information goes here.</div>
> <p id='footer>Copyright Me 2007.</p></body></html>"""
>
> INFO = """<html><head><title id='title'>The real title</title></head>
> <body id='info'><p>Here is the info, which would in the real world
> be read from a file.</p></body></html>"""
>
> page = Meld(LAYOUT)
> info = Meld(INFO)
> page.title = info.title._content
> page.info = info.info._content
> print page
>
> Is that the sort of thing you had in mind?
>
> -- 
> Richie Hindle
> richie at entrian.com
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list




From Roberto.Bonvallet at cern.ch  Fri Jan 12 15:25:07 2007
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Fri, 12 Jan 2007 20:25:07 +0000 (UTC)
Subject: parsing a file name
References: <1168622211.188972.179680@38g2000cwa.googlegroups.com>
Message-ID: <eo8qr3$p9d$1@cernne03.cern.ch>

CSUIDL PROGRAMMEr wrote:
> I have a filename
> cairo-2.3.4.src.rpm
> Is there any way i can only get 2.3.4 from this file name

 >>> a = "cairo-2.3.4.src.rpm"
 >>> import re
 >>> re.compile(r"\d+([.]\d+)*").search(a).group(0)
 '2.3.4'
 >>> a.split("-")[-1][:-len(".src.rpm")]
 '2.3.4'
 >>> ".".join(map(str, range(2, 5)))
 '2.3.4'

-- 
Roberto Bonvallet


From michele.cella at gmail.com  Thu Jan 25 11:31:30 2007
From: michele.cella at gmail.com (Michele Cella)
Date: 25 Jan 2007 08:31:30 -0800
Subject: ANN: Dejavu 1.5.0RC1
In-Reply-To: <1169712139.759270.165670@l53g2000cwa.googlegroups.com>
References: <mailman.3122.1169680178.32031.python-list@python.org>
	<1169703594.951755.180990@m58g2000cwm.googlegroups.com>
	<1169712139.759270.165670@l53g2000cwa.googlegroups.com>
Message-ID: <1169742690.210321.264090@v33g2000cwv.googlegroups.com>

On 25 Gen, 09:02, "fumanchu" <fuman... at amor.org> wrote:
>
> > I am curious ... how this compare to SQLAlchemy?The comparisons could be endless ;) but here are some of the larger
> differences:
>
>  1. Dejavu uses generic "storage" concepts and syntax, while SQLAlchemy
> prefers database concepts and syntax.
>  2. Dejavu uses Python expressions (lambdas) to query storage, whereas
> SQLAlchemy uses functions and magic attributes:
>     * SQLAlchemy: users.select(and_(users.c.age < 40, users.c.name !=
> 'Mary'))
>     * Dejavu: recall(users, lambda u: u.age < 40 and u.name != 'Mary')
>  3. SQLAlchemy prefers that you write data classes, table classes and
> the mappers between them. Dejavu only expects you to write a data
> class. New in 1.5: you can auto-generate even the data classes if you
> already have a populated database.
>  4. SQLAlchemy allows you to write more complicated queries (like
> subqueries and aggregate columns). Dejavu doesn't provide those yet
> (slated for 1.6).
>

5. Dejavu supports model evolution (very much like rails's ActiveRecord
migrations)

I will add that I've never been able to (easily) wrap my head around
ORMs like SQLObject and SQLAlchemy, while they are both great pieces of
software and SQLAlchemy is impressively well documented (like every
other things powered by Michael Bayer) they are trying to reinvent an
ad-hoc query language on top of SQL using python that you need to
learn, that's why my favorite Dejavu feature it's the way you build
queries (using common python constructs like lambda) and define models
(using python types like str, unicode... or your own).

I really encourage anyone to check it out, it's not getting the
publicity it deserves but this doesn't mean it's not good at what it
does, and Robert is like a quality assurance. ;-)

Ciao
Michele



From bearophileHUGS at lycos.com  Thu Jan 18 19:55:39 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 18 Jan 2007 16:55:39 -0800
Subject: Iterator length
In-Reply-To: <1169167258.553202.190130@m58g2000cwm.googlegroups.com>
References: <1169162762.997894.180320@q2g2000cwa.googlegroups.com>
	<1169167258.553202.190130@m58g2000cwm.googlegroups.com>
Message-ID: <1169168139.350836.79790@s34g2000cwa.googlegroups.com>

George Sakkis:
> Is this a rhetorical question ? If not, try this:

It wasn't a rhetorical question.


> >>> x = (i for i in xrange(100) if i&1)
> >>> if leniter(x): print x.next()

What's your point? Maybe you mean that it consumes the given iterator?
I am aware of that, it's written in the function docstring too. But
sometimes you don't need the elements of a given iterator, you just
need to know how many elements it has. A very simple example:

s = "aaabbbbbaabbbbbb"
from itertools import groupby
print [(h,leniter(g)) for h,g in groupby(s)]

Bye,
bearophile



From rasmussen.bryan at gmail.com  Sat Jan 27 03:32:13 2007
From: rasmussen.bryan at gmail.com (bryan rasmussen)
Date: Sat, 27 Jan 2007 09:32:13 +0100
Subject: Yank Bastards KILLED THEIR OWN PEOPLE to stage 911 DRAMA
In-Reply-To: <1169837804.481376.5790@q2g2000cwa.googlegroups.com>
References: <1169837804.481376.5790@q2g2000cwa.googlegroups.com>
Message-ID: <3bb44c6e0701270032j22e59864v1a598aea47e91b26@mail.gmail.com>

See, if the python list mail server was written in Lisp Paul Graham
would already have been able to write up a spam filter to ban this
guy.

Seriously though,  shouldn't Thermate be banned by now.

Cheers,
Bryan Rasmussen

On 26 Jan 2007 10:56:44 -0800, thermate at india.com <thermate at india.com> wrote:
> There is a million dollar reward for ANY fascist bastard to disprove
> this assertion by giving a consistent theory of ALL the major observed
> effects on that day about the related events.
>
> Dick faced Cheney sprayed his own lawyer with BB's.
>
> See the video by Alex Jones on the Forensics, why the claims of
> distance and mistake were such a big lie .......
>
> 911 TRUTH BACK WITH VIGOR AND NEW SITE
> Now it has two sites under
> www.st911.org
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From libintr at gmail.com  Sun Jan 28 06:25:11 2007
From: libintr at gmail.com (lee)
Date: 28 Jan 2007 03:25:11 -0800
Subject: from future module!!!!!!!
Message-ID: <1169983511.674847.281290@s48g2000cws.googlegroups.com>

Guys whats the from future module in python?thanks



From tim at tdw.net  Wed Jan 17 09:05:39 2007
From: tim at tdw.net (Tim Williams)
Date: Wed, 17 Jan 2007 14:05:39 +0000
Subject: generate tuples from sequence
In-Reply-To: <G63136508.599.6596.1@mxextra>
References: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>
	<G63136508.599.6596.1@mxextra>
Message-ID: <9afea2ac0701170605m2aa59f7hbea57159451d0e86@mail.gmail.com>

On 17 Jan 2007 04:50:33 -0800, Will McGugan <will at willmcgugan.com> wrote:
>
> Will McGugan wrote:
>
> > Hi,
> >
> > I'd like a generator that takes a sequence and yields tuples containing
> > n items of the sqeuence, but ignoring the 'odd' items. For example
>
> Forgot to add, for my purposes I will always have a sequence with a
> multiple of n items.

something along the lines of.......

>>> [ (x,x+1,x+2) for x in xrange(0,9,3) ]
[(0, 1, 2), (3, 4, 5), (6, 7, 8)]


HTH :)


From brochu121 at gmail.com  Wed Jan 17 17:34:31 2007
From: brochu121 at gmail.com (David Brochu)
Date: Wed, 17 Jan 2007 17:34:31 -0500
Subject: Making a simple script standalone
Message-ID: <9583ed900701171434s155907f0s5d681a6935d37ff9@mail.gmail.com>

> Hi,
> I'm new to this group. I've tried finding my answer in existing messages,
> but no such luck.
>
> What I want to do is to compile/bundle/prepare/whatever_term a simple
> Python script for deployment on a Windows machine. Installing Python
> itself on that machine, is not an option. Ideally I would like to obtain
> a single executable file, but a script+runtime is acceptable.
>
> There is nothing graphical, nothing fancy about the script.
> The only imports are: os, stat, string and time.
>
>
> Any suggestions on an - easy and clear - path to follow ?
>
>

cx_Freeze was not mentioned so far. its perhaps most easy and clear.



Robert

[You might also look into Py2Exe - http://www.py2exe.org/ I have used this
before and it wasn't too difficult to bundle everything up into 1 exe file.
Definately read the tutorial]

Dave
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070117/2365e09a/attachment.html>

From denis.kasak at gmail.com  Wed Jan  3 16:34:26 2007
From: denis.kasak at gmail.com (Denis Kasak)
Date: Wed, 03 Jan 2007 22:34:26 +0100
Subject: type classobj not defined?
In-Reply-To: <mailman.2246.1167843463.32031.python-list@python.org>
References: <mailman.2246.1167843463.32031.python-list@python.org>
Message-ID: <enh8am$qnq$1@news1.xnet.hr>

Wesley Brooks wrote:
> Dear Users,
> 
> I'm in the process of adding assert statements to a large piece of
> code to aid with bug hunting and came across the following issue;
> 
> Using python in a terminal window you can do the following:
> 
>> type(False) == bool
> True
> 
> I would like to check that an object is a class, here's an example:
> 
>> class b:
> ....def __init__(self):
> ........self.c = 1
> ....def d(self):
> ........print self.c
> 
>> type(b)
> <type 'classobj'>
> 
> But the following fails:
> 
>> type(b) == classobj
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> NameError: name 'classobj' is not defined

You can compare it against the ClassType object located in the types module.

 > import types
 > class b:
....def __init__(self):
........self.c = 1
....def d(self):
........print self.c

 > type(b) == types.ClassType
True

-- 
Denis Kasak


From bearophileHUGS at lycos.com  Wed Jan  3 21:00:38 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 3 Jan 2007 18:00:38 -0800
Subject: code optimization (calc PI) / Full Code of PI calc in Python and
	C.
In-Reply-To: <cuYmh.201$9v1.239@nntpserver.swip.net>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
	<459BFDCB.4000503@sschwarzer.net>
	<UGXmh.194$9v1.250@nntpserver.swip.net>
	<1167872076.937415.250340@11g2000cwr.googlegroups.com>
	<cuYmh.201$9v1.239@nntpserver.swip.net>
Message-ID: <1167876037.524055.315250@v33g2000cwv.googlegroups.com>

Michael M.:
> * The C is very fast, Python not.
> * Target: Do optimization, that Python runs nearly like C.

Python can't be fast as C for that kind of programs.
Note that your original C program gives less digits than the Python
program.
Your original takes about ~15.2 s on my PC. The following version (I
have just cleaned it up a bit, probably it can be improved) needs about
~0.7 seconds with Psyco and ~5.7 s without (Psyco compilation time and
Python startup times aren't included, if you include them the timings
are ~0.94 s and ~5.96 s).
Compiled with ShedSkin this program needs ~0.29 s (redirecting the
output to a file, because ShedSkin printing is slow still).


from time import clock

def compute_pi():
    pi = []
    a = 10000
    b = d = e = g = 0
    c = 5600
    f = [2000] * (c + 4000 + 1)
    while c:
       d = 0
       g = c * 2
       b = c
       while b > 1:
         d += f[b] * a
         g -= 1
         f[b] = d % g
         d = d // g
         g -= 1
         d *= b
         b -= 1
       c -= 14
       pi.append("%04d" % int(e + d // a))
       e = d % a
    return "".join(pi)

import psyco; psyco.bind(compute_pi)
start_time = clock()
print compute_pi()
print "Total time elapsed:", round(clock() - start_time, 2), "s"

Bye,
bearophile



From chris at kateandchris.net  Tue Jan 30 10:39:19 2007
From: chris at kateandchris.net (Chris Lambacher)
Date: Tue, 30 Jan 2007 10:39:19 -0500
Subject: printing to a redirected stdout from a process that was called
	with "2>&1 > /dev/null &"
In-Reply-To: <1170112357.792999.241280@s48g2000cws.googlegroups.com>
References: <1170112357.792999.241280@s48g2000cws.googlegroups.com>
Message-ID: <20070130153919.GA12259@kateandchris.net>

On Mon, Jan 29, 2007 at 03:12:37PM -0800, Pappy wrote:
> SHORT VERSION:
> Python File B changes sys.stdout to a file so all 'prints' are written 
> to the file.  Python file A launches python file B with os.popen("./B 
> 2>&^1 >dev/null &").  Python B's output disappears into never-never 
> land.
> 
> LONG VERSION:
> I am working on a site that can kick off large-scale simulations.  It 
> will write the output to an html file and a link will be emailed to 
> the user.  Also, the site will continue to display "Loading..." if the 
> user wants to stick around.
> 
> The simulation is legacy, and it basically writes its output to stdout 
> (via simple print statements).  In order to avoid changing all these 
> prints, I simply change sys.stdout before calling the output 
> functions.  That works fine.  The whole thing writes to an html file 
> all spiffy-like.
> 
> On the cgi end, all I want my (python) cgi script to do is check for 
> form errors, make sure the server isn't crushed, run the simulation 
> and redirect to a loading page (in detail, I write a constantly 
> updating page to the location of the final output file.  When the 
> simulation is done, the constantly updating file will be magically 
> replaced).  The root problem is that the popen mechanism described 
> above is the only way I've found to truly 'Detach' my simulation 
> process.  With anything else, Apache (in a *nix environment) sits and 
> spins until my simulation is done.  Bah.
> 
> Any ideas?
The subprocess module is probably a good starting point:
http://docs.python.org/dev/lib/module-subprocess.html

It will allow you greater control over what happens with the output of a
process that you start.  Specifically look at the the stdout and stderr
arguments to Popen.  You can provide these with an open file descriptor or a
file object and it will dump the output into there.

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


From ggrp1.20.martineau at dfgh.net  Sun Jan  7 17:15:09 2007
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 7 Jan 2007 14:15:09 -0800
Subject: PDF rendering toolkit?
References: <mailman.2348.1168030338.32031.python-list@python.org>
Message-ID: <1168208109.479979.99370@38g2000cwa.googlegroups.com>

Jorge Vargas wrote:
> Hi
>
> I'm looking for a tool to take an actual .pdf file and display it in a
> window (I'm using wxwidgets at the moment)
>
> [snip]

How about just using Adobe's Acrobat Reader application which is freely
available on most platforms?

There's some related information about doing this in the following
thread that might help get you started :
> http://groups.google.com/group/comp.lang.python/browse_frm/thread/3a578c032ff72d46/c1ddf40bf738cd7f?&hl=en#c1ddf40bf738cd7f

HTH,
-Martin



From steve at holdenweb.com  Mon Jan 29 13:29:22 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 29 Jan 2007 18:29:22 +0000
Subject: Can I undecorate a function?
In-Reply-To: <slrnersb0v.mua.matt@mwilson.umlcoop.net>
References: <slrnersb0v.mua.matt@mwilson.umlcoop.net>
Message-ID: <epleh2$o7n$1@sea.gmane.org>

Matthew Wilson wrote:
> The decorator as_string returns the decorated function's value as
> string.  In some instances I want to access just the function f,
> though, and catch the values before they've been decorated.
> 
> Is this possible?
> 
> def as_string(f):
>     def anon(*args, **kwargs):
>         y = f(*args, **kwargs)
>         return str(y)
>     return anon
> 
> @as_string
> def f(x):
>     return x * x
> 
It's much simpler not to use the decorator syntax if you also want 
access to the original function.

Simply declare f as a function, then assign decorator(f) to some other name.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From gherron at islandtraining.com  Wed Jan 24 16:12:21 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 24 Jan 2007 13:12:21 -0800
Subject: Static variables
In-Reply-To: <ep8gkl$g7v$3@news.in.tum.de>
References: <ep8gkl$g7v$3@news.in.tum.de>
Message-ID: <45B7CBB5.3060200@islandtraining.com>

Florian Lindner wrote:
> Hello,
> does python have static variables? I mean function-local variables that keep
> their state between invocations of the function.
>
> Thanks,
>
> Florian
>   
Nope.  Not really.

In new versions of Python, functions and methods can have attributes 
that can be used like function level static variables. 

However, I usually use module level attributes for such things.

Gary Herron



From grzesiof at gmail.com  Sun Jan  7 10:44:50 2007
From: grzesiof at gmail.com (gz)
Date: 7 Jan 2007 07:44:50 -0800
Subject: low level python read's
Message-ID: <1168184689.924811.305290@42g2000cwt.googlegroups.com>

Hi!

I wanted to use python to test a simple character device (on linux) and
I'm running into strange behaviour of read..
I have a short buffer inside my device and the idea is that it blocks
read's when the buffer is empty. For reads that ask for more characters
that the buffer holds the device should return the number of bytes
actually read...

In c i can write:
f = open("/dev/testdevice",O_RDWR);
read(f,buffer,1000);

and i see in my device, that everything is ok.

No I'd love to reproduce this in python..
f = open("/dev/testdevice", "r+",0) # for unbuffered access
f.read(1000)

..but now i see in the device log's that python issued 2 reads! One
that got the whole buffer (less then 1000 chars) and after that python
tries to read more! (and hangs in my device, since the buffer is
empty...

So how do i stop python from trying to be smart and just read *at most*
1000 chars and let it go if he(it?*) reads less?



grzes.
p.s *is python a "he" or an "it"?



From smusnmrNOSPAM at yahoo.com  Tue Jan  9 02:47:08 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Tue, 9 Jan 2007 08:47:08 +0100
Subject: help: code formatter?
References: <entknh$8onl$1@zam602.zam.kfa-juelich.de>
	<50f5nnF1fb5uqU1@mid.individual.net>
Message-ID: <envh9u$cdlp$1@zam602.zam.kfa-juelich.de>

Bjoern wrote:

> Why don't you just write one? :)

Very funny! Just learning Python  :(

Regards,

siggi

> siggi wrote:
>
>> as a newbie I have problems with formatting code of downloaded
>> programs, because IDLE's reformatting capabilities are limited .
>> Incorrect indentation, mixing of TAB with BLANKs or eol are often
>> very nasty to correct.
>> Is there a simple code formatter that first removes all
>> indentations and then refomats correctly?
>
> Why don't you just write one? :)
>
> Seriously: Try.
>
> BTW: Guessing to what amount of space TABs must be converted in
> mixed source can be non-trivial.
>
> Regards,
>
>
> Bj?rn
>
> -- 
> BOFH excuse #289:
>
> Interference between the keyboard and the chair.
> 




From paddy3118 at netscape.net  Wed Jan 31 12:26:46 2007
From: paddy3118 at netscape.net (Paddy)
Date: 31 Jan 2007 09:26:46 -0800
Subject: how to "free" an object/var ?
In-Reply-To: <pan.2007.01.31.07.34.24.221453@REMOVEME.cybersource.com.au>
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
	<epolgl$8i4$1@zinnia.noc.ucla.edu>
	<pan.2007.01.31.06.52.12.82782@REMOVEME.cybersource.com.au>
	<1170228172.691120.200280@a75g2000cwd.googlegroups.com>
	<pan.2007.01.31.07.34.24.221453@REMOVEME.cybersource.com.au>
Message-ID: <1170264406.588032.116550@s48g2000cws.googlegroups.com>

On Jan 31, 7:34 am, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
wrote:
> On Tue, 30 Jan 2007 23:22:52 -0800, Paddy wrote:
> >> As far as I know there is no way to force the deletion of an object
> >> even if it is in use. This is a Good Thing.
>
> >> --
> >> Steven D'Aprano
>
> > The folowing will make the data available for garbage collection no
> > matter what references it:
>
> >>>> l = ["data"] *10
> >>>> l
> > ['data', 'data', 'data', 'data', 'data', 'data', 'data', 'data', 'data',
> > 'data']
> >>>> l2 = l
> >>>> l[:] = []
> >>>> l2
> > []
>
> Sort of.
>
> What happens is that both l and l2 are names referring to the same list.
> After executing l[:] the *contents* of the list change, from lots of
> "data" to nothing. Naturally both l and l2 see the change, because they
> both point to the same list. But the original contents of the list still
> exist until the garbage collector sees that they are no longer in use,
> and then frees them.
>
> You can prove this by doing something like this:
>
> data = "\0"*1000000 # one (decimal) megabyte of data
> L = [data] # put it in a list
> L[:] = []  # "free" the contents of the list
> assert len(data) == 1000000
> # but the megabyte of data still there
>
> Again, you can't force Python to free up memory that is still in use.
> If you could, that would be a bug.
>
> --
> Steven D'Aprano

Thanks Stephen for explaining my answer a bit more.

The [:] = [] trick should be of most use when you go on to allocate
large amounts of data in your program once again, when the gc coud
then make some of the same memory available for the new objects.
As others have said, getting Python to give back memory to the
underlying OS is murder - The best way I have of doing that is to
split your program into two and chain their execution, which allows
the OS to reclaim the memory used by the first Python process when it
finishes.

- Paddy.



From huayang.xia at gmail.com  Wed Jan 10 17:40:58 2007
From: huayang.xia at gmail.com (Huayang Xia)
Date: 10 Jan 2007 14:40:58 -0800
Subject: where to find the spec of format in PyObject_CallMethod
In-Reply-To: <mailman.2546.1168468281.32031.python-list@python.org>
References: <1168466755.996033.130120@i39g2000hsf.googlegroups.com>
	<mailman.2546.1168468281.32031.python-list@python.org>
Message-ID: <1168468858.432320.129920@k58g2000hse.googlegroups.com>

Thanks. I have mixed arguments.

I found the format spec @ http://docs.python.org/api/arg-parsing.html

On Jan 10, 5:31 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> On Wed, 2007-01-10 at 14:05 -0800, Huayang Xia wrote:
> > I am trying to use PyObject_CallMethod. It needs a format string to
> > specify what are the followed arguments. Is it possible to use a
> > PyObject* as an argument?
>
> > Where can I find the spec for the format?
>
> > Thanks in advance.Seehttp://docs.python.org/api/object.html#l2h-247:
>
> Note in particular "The C arguments are described by a Py_BuildValue()
> format string that should produce a tuple" and "Note that if you only
> pass PyObject * args, PyObject_CallMethodObjArgs is a faster
> alternative."
>
> So, If all your arguments are PyObject pointers, use
> PyObject_CallMethodObjArgs instead. Otherwise, use PyObject_CallMethod
> and consult the documentation for Py_BuildValue on how to construct the
> format string.
> 
> Hope this helps,
> 
> Carsten.



From daniele.varrazzo at gmail.com  Thu Jan 18 08:16:56 2007
From: daniele.varrazzo at gmail.com (Daniele Varrazzo)
Date: 18 Jan 2007 05:16:56 -0800
Subject: Is it possible to fasten the import of cgi?
In-Reply-To: <45af6f47$0$322$e4fe514c@news.xs4all.nl>
References: <45af6f47$0$322$e4fe514c@news.xs4all.nl>
Message-ID: <1169126216.239740.202950@38g2000cwa.googlegroups.com>

Cecil Westerhof wrote:
> I have a cgi-script dat uses the modules cgi, os, sys and time. Offcourse I
> can not time the time used to import time, but os and sys do not take more
> as a millisecond. My script itself takes 3 or 4 milliseconds. But importing
> cgi takes 95 milliseconds. (This is on my test system a PII 300 MHz. Is
> there a way to make this more fast? The import off cgi makes the script at
> least 20 times as slow. Something like mod-python is not a possibility. I
> could use it on my test machine, but not at the osting provider.

Does the hosting provider support fastcgi? It would avoid starting the
interpreter at each request too.



From aisaac at american.edu  Wed Jan 17 22:53:14 2007
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 18 Jan 2007 03:53:14 GMT
Subject: generate tuples from sequence
References: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>
	<eol9ac$v3l$02$1@news.t-online.com>
Message-ID: <KaCrh.1768$R76.979@trnddc05>


"Peter Otten" <__peter__ at web.de> wrote in message
news:eol9ac$v3l$02$1 at news.t-online.com...
> I like
>
> >>> items = range(9)
> >>> N = 3
> >>> zip(*[iter(items)]*N)
> [(0, 1, 2), (3, 4, 5), (6, 7, 8)]

Except that it is considered implementation dependent:
http://mail.python.org/pipermail/python-list/2005-February/307550.html

Alan Isaac




From rocky at panix.com  Thu Jan 25 08:08:39 2007
From: rocky at panix.com (R. Bernstein)
Date: 25 Jan 2007 08:08:39 -0500
Subject: pdb in python2.5
References: <1169717486.230356.79730@l53g2000cwa.googlegroups.com>
Message-ID: <wihtzyfs17s.fsf@panix3.panix.com>

"Rotem" <vmalloc at gmail.com> writes:

> Hi,
> 
> Maybe I'm repeating a previous post (please correct me if I am).
> 
> I've tried the following code in python 2.5 (r25:51908, Oct  6 2006,
> 15:22:41)
> example:
> 
> from __future__ import with_statement
> import threading
> 
> def f():
>     l = threading.Lock()
>     with l:
>         print "hello"
>         raise Exception("error")
>         print "world"
> 
> try:
>     f()
> except:
>    import pdb
>    pdb.pm()
> 
> This fails because pdb.pm() attempts to access sys.last_traceback which
> is not assigned.

Recent releases of pydb (http://bashdb.sf.net/pydb) don't suffer this
problem. (But see below.)

> Trying:
> pdb.post_mortem(sys.exc_traceback)
> 
> Yields the following:
> > test.py(9)f()
> -> print "world"
> (Pdb)
> 
> the 'w' command yields a similar output, which implies that the
> exception was thrown from the wrong line.
> the traceback module is better, yielding correct results (displays line
> 8 instead of 9).
> 
> Has anyone encountered this behavior? 

Yes, this seems to be a bug in pdb. It is using the traceback's f_line
instance variable rather than the tb_lineno instance variable. I guess
these two values are usually the same. In fact, I haven't been able to
come up with a Python 2.4 situtation where they are different. (If
someone can, I'd appreciate it if you'd send me a small example so I
can put it in the pydb regression tests.) Even in 2.5, it's kind of
hard to get a case where they are different. If I remove the "with",
the problem goes away.

It was also bug in pydb, but I've just committed in CVS the fix for
this


> is pdb broken?

Best as I can tell pdb isn't all that well maintained. (Had it been, I
probably wouldn't have devoted the time to pydb that I have been.)

> I get similar results for larger/more complex pieces of code.

> 
> Thanks in advance,
> 
> Rotem


From mail at microcorp.co.za  Wed Jan 17 02:57:33 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 17 Jan 2007 09:57:33 +0200
Subject: asyncore/asynchat and terminator string
References: <45AD5A2F.7060701@ilm.com>
Message-ID: <000301c73a17$b11ee800$03000080@hendrik>

 "David Hirschfield" <davidh at ilm.com> wrote:

8< --------------- problems on syncing up in serial comms -----------------

I have seen people address this with success by using stuff like:

"XXHEADERXX" as a "here starts the lesson" identifier, with no 
trouble, on a high volume newsfeed.

If you assume that any binary value is possible and equally likely, 
then the problem looks hopeless, but in practice if you do this kind 
of thing, followed by a length, which automatically points to the 
next "instance" of the "here starts the lesson" in a stream, then 
it becomes extremely unlikely to occur in the wild.  If you also
repeat the length at the end, then you can "scan Backwards" 
through the stream. And if its not like that, its a "false sync"...

The other way is to take a leaf out of the bit oriented protocols'
book, and to "frame" the "packets" between (possibly repetitious)
occurrences of a character that is guaranteed not to occur in the
data, known as a "flag" character.

You do this by a process that is called "escaping" the occurrences 
of the flag character in the data with yet another "escape char", 
that also needs special treatment if it happens in the data...

Escaping can be accomplished by replacing each instance of the
"Poison Characters" by an instance of the escape char, followed 
by the bitwise inversion of the poison char.  Unescaping has to
do the reverse.

Using a tilde "~" as a flag char, and the ordinary slash as an 
escape char works well.

So a packet with both poison chars in it will look like this:

"~~ordinary chars followed by tilde" + "/\x81"+
"ordinary followed by slash" +"/\xd0" + "somestuff~~"

So you sync up by looking for a tilde followed by a 
non tilde, and the end is when you hit a tilde again.

To unescape, you look for slashes and invert the chars
following them.

Also Yahoo for "netstrings"

If you want to be Paranoid, then you also implement message
numbers, to make sure you don't lose packets, and for hyper
paranoia, put in a BCC or LRC to make sure what you send
off is received...

If you are running over Ethernet, the last lot is not warranted,
as its done anyway - but on a serial port, where you are on 
your own, it makes sense.

HTH - Hendrik



From rubic88 at gmail.com  Wed Jan 31 17:04:13 2007
From: rubic88 at gmail.com (Rubic)
Date: 31 Jan 2007 14:04:13 -0800
Subject: ctypes error on exit of win32 application
Message-ID: <1170281053.423976.85890@j27g2000cwj.googlegroups.com>

I'm attempting to use ctypes on a DLL with the following
signature:

__declspec(dllimport) void process_record(char *, char *);

An example .cpp file has code like this:

   int main(int argc, char **argv)
   {
      char record[100];
      char code[6];
        ...
      process_record(code, record);

When I invoke it under Python everything fine
while the interpreter is running:

   >>> from ctypes import *
   >>> record = create_string_buffer("My Record")
   >>> code = create_string_buffer('\000' * 6)
   >>> cdll.grouper.process_recode(code, record)
   >>> print code.value
   '9999'

But when the interpreter exits, either interactively
or from a script, the following Program Error popup
gets displayed:

  "python.exe has generated errors and will be closed
   by Windows.  You will need to restart the program."

What can I do to prevent this error?
(Environment: Win2000, Python 2.5)
--
Jeff Bauer
Rubicon, Inc.



From george.sakkis at gmail.com  Thu Jan 11 19:51:25 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 11 Jan 2007 16:51:25 -0800
Subject: Fixed keys() mapping
References: <1168535970.585977.317760@p59g2000hsd.googlegroups.com>
	<slrneqd2f1.qk.horpner@FIAD06.norwich.edu>
Message-ID: <1168563085.550262.83550@s34g2000cwa.googlegroups.com>

For what it's worth, I added it to the Cookbook:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/499373

George



From gagsl-py at yahoo.com.ar  Mon Jan 22 14:19:54 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 22 Jan 2007 16:19:54 -0300
Subject: (newbie) new version install (winXP) ?
In-Reply-To: <ba3e7$45b50950$d443bb3a$2324@news.speedlinq.nl>
References: <ba3e7$45b50950$d443bb3a$2324@news.speedlinq.nl>
Message-ID: <7.0.1.0.0.20070122161709.0598aaf0@yahoo.com.ar>

At Monday 22/1/2007 15:58, you wrote:

>Can I install only the higher version of a certain package ?
>Is that done by simply copying them ?

You should read the install instructions given in the package, but 
usually it's as easy as:
- extract the .zip into a temporary directory
- open a command line window, go to that directory, and run:
- python setup.py install

>Should I make a backup (of what) ?

Perhaps...


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From joel.hedlund at gmail.com  Thu Jan 11 11:01:05 2007
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Thu, 11 Jan 2007 17:01:05 +0100
Subject: Need startup suggestions for writing a MSA viewer GUI in python
In-Reply-To: <1168525085.580490.76860@i39g2000hsf.googlegroups.com>
References: <eo2uhr$ffn$1@news.lysator.liu.se>
	<1168525085.580490.76860@i39g2000hsf.googlegroups.com>
Message-ID: <eo5me6$6d7$1@news.lysator.liu.se>

> UI design requires a different skillset than programming. It can be a
> very frustrating and thankless task as well. It is incomparably easier
> to see the flaws in existing interfaces than correcting them (or even
> creating the said interface). Make sure to start with something simple,
> and learn that way.
> 
> I would also recommend that you implement something novel, there are
> many existing MSA viewers and it won't be easy to improve on them. Do
> something that adds new value and people will be willing to expend
> effort to use it.

That's true for any software. And for any aspect of life, come to think 
about it.

/Joel


From no-spam at no-spam-no-spam.invalid  Wed Jan 17 12:55:27 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 17 Jan 2007 18:55:27 +0100
Subject: predefined empty base class ??
In-Reply-To: <1169053011.399278.290980@a75g2000cwd.googlegroups.com>
References: <1169053011.399278.290980@a75g2000cwd.googlegroups.com>
Message-ID: <eolnt7$umc$1@news.albasani.net>

iwl wrote:
> Hi,
> 
> is there an predefined empty base class
> which I can instanziate to have an 
> container i can copy attributes in?
> 

you are not the only one missing such class

http://groups.google.com/group/comp.lang.python/msg/3ff946e7da13dba9

RFE SF #1637926


Robert


From paul at boddie.org.uk  Sun Jan  7 12:02:55 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 7 Jan 2007 09:02:55 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
	<7xd55rzke9.fsf@ruckus.brouhaha.com>
	<slrneq2055.tcj.grahn+nntp@frailea.sa.invalid>
	<mailman.2388.1168181437.32031.python-list@python.org>
	<7x3b6mzwkl.fsf@ruckus.brouhaha.com>
Message-ID: <1168189375.843789.306180@51g2000cwl.googlegroups.com>

Paul Rubin wrote:
>
>     class A:
>       __x = 3
>
>     class B(A):
>       __x = 4   # ok
>
>     class C(B):
>       __x = 5   # oops!
>
> Consider that the above three class definitions might be in separate
> files and you see how clumsy this gets.

What are you trying to show with the above? The principal benefit of
using private attributes set on either the class or the instance is to
preserve access, via self, to those attributes defined in association
with (or within) a particular class in the inheritance hierarchy, as
opposed to providing access to the "most overriding" definition of an
attribute. This is demonstrated more effectively with a method on class
A:

  class A:
      __x = 3
      def f(self):
          print self.__x # should always refer to A.__x

  class B(A):
      __x = 4

  class C(B):
      __x = 5

Here, instances of A, B and C will always print the value of A.__x when
the f method is invoked on them. Were a non-private attribute to be
used instead, instances of A, B and C would print the overridden value
of the attribute when the f method is invoked on them.

Paul



From godson.g at gmail.com  Mon Jan 15 06:31:34 2007
From: godson.g at gmail.com (Godson)
Date: Mon, 15 Jan 2007 17:01:34 +0530
Subject: python and MOV or MPEG
In-Reply-To: <510uf3F1i9oo6U1@mid.uni-berlin.de>
References: <eoffha$epe2$1@zam602.zam.kfa-juelich.de>
	<510uf3F1i9oo6U1@mid.uni-berlin.de>
Message-ID: <f9822b400701150331i4204b025ibe159ca3931263da@mail.gmail.com>

On 1/15/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
>
> siggi wrote:
>
> > Hi all,
> >
> > does Python support MPEG or MOV videoclips? I couldn't find anything
> about
> > it online.
>
> Weak in googling today? Must have been a rough weekend.
>
> There are several options, including pymedia and pygame.
>
> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Here is a way how you can do it!

http://godsongera.blogspot.com/2006/12/play-mpeg-file-with-python.html

-- 
Godson Gera,
http://godson.auroinfo.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070115/09c8c7ed/attachment.html>

From S.Mientki-nospam at mailbox.kun.nl  Mon Jan 15 15:45:20 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Mon, 15 Jan 2007 21:45:20 +0100
Subject: Anyone has a nice "view_var" procedure ?
Message-ID: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>

hello,

Is there some handy/ nice manner to view the properties of some variable ?
As a newbie, I often want to see want all the properties of a var,
and also some corner values (large arrays) etc.

Probably it's not so difficult,
but I don't see how to distinguish for example between a string and an 
array. An array has a shape, a string not etc.


thanks,
Stef Mientki


From deets at nospam.web.de  Mon Jan 22 08:40:49 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 22 Jan 2007 14:40:49 +0100
Subject: Getting to an SSH account over a HTTP proxy
References: <mailman.2985.1169469575.32031.python-list@python.org>
Message-ID: <51jt71F1k884hU1@mid.uni-berlin.de>

BJ?rn Lindqvist wrote:

> I want to use Python to connect to a SSH account over a HTTP proxy to
> automate some operations. I thought paramiko would be able to do that,
> but it can not (it seems).
> 
> Is there some other Python module that can do what I want?

Is there anything that can do what you want? Last time I checked there is no
such thing as SSH-over-HTTP. Are you sure that is possible?

Diez


From gatis.tomsons at gmail.com  Tue Jan  9 08:30:46 2007
From: gatis.tomsons at gmail.com (Gacha)
Date: 9 Jan 2007 05:30:46 -0800
Subject: pyExcelerator big integer values
Message-ID: <1168349446.381187.65810@11g2000cwr.googlegroups.com>

I use pyExcelerator to import some data from xml file. One column
contains integer values like:
4750456000708
4750456000715
4750456000333
...
But when I do import the pyExcelerator converts them to something like
this:
4.7504560002e+12
4.7504560007e+12
4.7504560007e+12
4.7504560003e+12

How I understand it's because the integer value is too big. If the type
of the items was string, then all would be fine, but I can't control
the file content.

The question is, how can I import the integers in normal format.



From pete at fenelon.com  Tue Jan  9 15:16:01 2007
From: pete at fenelon.com (Pete Fenelon)
Date: Tue, 9 Jan 2007 20:16:01 +0000
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
Message-ID: <1p9d74-5i71.ln1@stratos.fenelon.com>

In comp.arch.embedded octabox at gmail.com wrote:
> Hello all,
> 
> I represent Octabox, an Internet Start-up developing a wide-scale

Hello. F*ck off, spammer.


pete
-- 
pete at fenelon.com "he just stuck to buying beer and pointing at other stuff"


From richard.m.tew at gmail.com  Mon Jan  8 05:14:42 2007
From: richard.m.tew at gmail.com (Richard Tew)
Date: 8 Jan 2007 02:14:42 -0800
Subject: Stackless Python 2.5 for Nintendo DS
Message-ID: <1168251282.391733.274050@38g2000cwa.googlegroups.com>

Hi,

I have updated NDS Python from Python 2.4.3 to Python 2.5 (or rather
the Stackless version of it).

You can read more about it here if it might interest you:
http://www.disinterest.org/NDS/Python25.html

Cheers,
Richard.



From could.net at gmail.com  Sat Jan 27 21:33:49 2007
From: could.net at gmail.com (Frank Potter)
Date: 27 Jan 2007 18:33:49 -0800
Subject: extracting from web pages but got disordered words sometimes
In-Reply-To: <1169926006.739252.57360@p10g2000cwp.googlegroups.com>
References: <1169896727.567159.239160@a34g2000cwb.googlegroups.com>
	<1169926006.739252.57360@p10g2000cwp.googlegroups.com>
Message-ID: <1169951629.215444.322170@s48g2000cws.googlegroups.com>

Thank you, I tried again and I figured it out.
That's something with beautiful soup, I worked with it a year ago also 
dealing with Chinese html pages and nothing error happened. I read the 
old code and I find the difference. Change the page to unicode before 
feeding to beautiful soup, then everything will be OK.

On Jan 28, 3:26 am, "Paul McGuire" <p... at austin.rr.com> wrote:
> After looking at the pyparsing results, I think I see the problem with
> your original code.  You are selecting only the characters after the
> rightmost "-" character, but you really want to select everything to
> the right of "- -".  In some of the titles, the encoded Chinese
> includes a "-" character, so you are chopping off everything before
> that.
>
> Try changing your code to:
>     title=full_title.split("- -")[1]
>
> I think then your original program will work.
>
> -- Paul



From tubby at bandaheart.com  Thu Jan  4 21:46:32 2007
From: tubby at bandaheart.com (tubby)
Date: Thu, 04 Jan 2007 21:46:32 -0500
Subject: clarification on open file modes
Message-ID: <enke74$9j2$1@solaris.cc.vt.edu>

Does a py script written to open and read binary files on Windows affect 
files on a Linux or Mac machine in a negative way? My concern is 
portability and safety. I want scripts written within Windows to work 
equally well on Linux and Mac computers.

Is this the safest, most portable way to open files on any platform:

fp = open(file_name, 'rb')
fp.close()

I understand that doing the following on Windows to a binary file (a 
jpeg or exe files for example) can cause file corruption, is that correct?

fp = open(file_name, 'r')
fp.close()

How can a simple open in read mode corrupt data???


From deets at nospam.web.de  Mon Jan  8 04:41:07 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 08 Jan 2007 10:41:07 +0100
Subject: Recommendations (or best practices)  to define functions (or
	methods)
In-Reply-To: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
Message-ID: <50ehtmF1fh46iU1@mid.uni-berlin.de>

vizcayno schrieb:
> Hello:
> Need your help in the "correct" definition of the next function. If
> necessary, I would like to know about a web site or documentation that
> tells me about best practices in defining functions, especially for
> those that consider the error exceptions management.
> I have the next alternatives but I think there are better:

<snip/>

IMHO none of them is good. Python has exceptions. Use them. There is no 
need to awkwardly communicate error conditions using return-values. Use 
return values to return values. Use exceptions in case of errors.

Diez


From deets at nospam.web.de  Mon Jan  1 15:08:51 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 01 Jan 2007 21:08:51 +0100
Subject: Question concerning this list [WebCrawler]
In-Reply-To: <mailman.2178.1167588905.32031.python-list@python.org>
References: <mailman.2164.1167526942.32031.python-list@python.org>	<pan.2006.12.31.02.30.57.385901@REMOVE.THIS.cybersource.com.au>	<mailman.2166.1167535289.32031.python-list@python.org>	<pan.2006.12.31.10.30.04.940467@gmx.net>	<mailman.2169.1167563637.32031.python-list@python.org>	<GFSlh.27960$hI.14805@newssvr11.news.prodigy.net>
	<mailman.2178.1167588905.32031.python-list@python.org>
Message-ID: <4vt82jF1ddi9fU1@mid.uni-berlin.de>

Thomas Ploch schrieb:
> John Nagle schrieb:
>>     Very true.  HTML is LALR(0), that is, you can parse it without
>> looking ahead.  Parsers for LALR(0) languages are easy, and
>> work by repeatedly getting the next character and using that to
>> drive a single state machine.  The first character-level parser
>> yields tokens, which are then processed by a grammar-level parser.
>> Any compiler book will cover this.
>>
>>     Using regular expressions for LALR(0) parsing is a vice inherited
>> >from Perl, in which regular expressions are easy and "get next
>> character from string" is unreasonably expensive.  In Python, at least
>> you can index through a string.
>>
>> 				John Nagle
> 
> I take it with LALR(0) you mean that HTML is a language created by a
> Chomsky-0 (regular language) Grammar?

Nope.

LALR is a context free grammar parsing technique.

Regular expressions can't express languages like

a^n b^n

but something like

<div><div></div></div>

is <div>^2</div>^2

Diez


From libintr at gmail.com  Mon Jan  8 13:27:11 2007
From: libintr at gmail.com (lee)
Date: 8 Jan 2007 10:27:11 -0800
Subject: newbieee
Message-ID: <1168280831.323496.277020@38g2000cwa.googlegroups.com>

I getting familiarised with python...can any one suggest me a good
editor available for python which runs on windows xp....one more
request guys...can nyone tell me a good reference manual for python..



From cvanarsdall at mvista.com  Thu Jan 11 19:09:22 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Thu, 11 Jan 2007 16:09:22 -0800
Subject: Tools Designing large/complicated applications
Message-ID: <45A6D1B2.2040508@mvista.com>

For those of you that work on larger applications but still code in 
python... do your development teams use any tools to facilitate the 
design? (i'm not asking about editors here, i'm really asking about 
software design tools)  Are these the same tools you would use to help 
engineer software in another language?

Is there anyone here who is forced to use a tool to design python 
software that completely hates it?  Why do you hate it?

Thanks!

-carl


-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From postindex at gmail.com  Fri Jan 12 18:11:46 2007
From: postindex at gmail.com (postindex at gmail.com)
Date: 12 Jan 2007 15:11:46 -0800
Subject: Is it possible to get whole commandline include redirection.., etc
Message-ID: <1168643505.949920.154470@a75g2000cwd.googlegroups.com>

Can I get whole commandline not only argument list.

1. When I command like this
    $ a.py > filename
2. sys.argv is returns only argument list
    ['a.py']

Is there a way to find out 'redirection' information.

thank you for reading this



From Eric_Dexter at msn.com  Thu Jan 18 02:57:04 2007
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 17 Jan 2007 23:57:04 -0800
Subject: Projects anyone?
In-Reply-To: <1168949268.618793.102890@l53g2000cwa.googlegroups.com>
References: <1168949268.618793.102890@l53g2000cwa.googlegroups.com>
Message-ID: <1169107024.688867.145120@l53g2000cwa.googlegroups.com>

I have a project available if you are intrested.  It is a music package
that includes everything from tracker style editing to code generators
for fltk(generates csound and python code) and dot code generation..
There is a huge range of possible projects and a little debugging so
you can even have your choice of tasks or come up with one of your own

https://sourceforge.net/projects/dex-tracker




placid wrote:
> Hi all,
>
> I'm looking for anyone who is working on a project at the moment that
> needs help (volunteer). The last project i worked on personally was
> screen-scraping MySpace profiles (read more at the following link)
>
> http://placid.programming.projects.googlepages.com/screen-scrapingmyspaceprofiles
>
>
> but that didn't go all to well, so im kinda bored and need something to
> do, with Python. So any suggestions anyone? 
> 
> Cheers



From gagsl-py at yahoo.com.ar  Wed Jan 17 16:55:52 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 17 Jan 2007 18:55:52 -0300
Subject: predefined empty base class ??
In-Reply-To: <2%trh.15631$X72.7347@newsread3.news.pas.earthlink.net>
References: <1169053011.399278.290980@a75g2000cwd.googlegroups.com>
	<2%trh.15631$X72.7347@newsread3.news.pas.earthlink.net>
Message-ID: <7.0.1.0.0.20070117185239.040f67b0@yahoo.com.ar>

At Wednesday 17/1/2007 15:34, Dennis Lee Bieber wrote:

> > is there an predefined empty base class
> > which I can instanziate to have an
> > container i can copy attributes in?
>
>         I think that's a two-liner...
>
> >>> class EmptyBase(object):
>...     pass

Do you want a one liner?

class EmptyBase(object): pass

:)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From hg at nospam.org  Fri Jan  5 04:11:49 2007
From: hg at nospam.org (hg)
Date: Fri, 05 Jan 2007 10:11:49 +0100
Subject: find a .py path
References: <nKunh.45586$gl2.35454@newsfe16.lga>
Message-ID: <0Nunh.45640$gl2.30462@newsfe16.lga>

hg wrote:

> Hi,
> 
> Is there an easy way for a script being executed (from anywhere) to know
> where is is ... something in os.path ?
> 
> Thanks,
> 
> hg

oops: os.path.abspath(sys.argv[0]) 

hg



From jon at ffconsultancy.com  Mon Jan  1 17:21:36 2007
From: jon at ffconsultancy.com (Jon Harrop)
Date: Mon, 01 Jan 2007 22:21:36 +0000
Subject: Writing more efficient code
References: <mailman.2185.1167676577.32031.python-list@python.org>
	<459959ea$0$8719$ed2619ec@ptn-nntp-reader02.plus.net>
	<1167687229.430930.197720@v33g2000cwv.googlegroups.com>
Message-ID: <459989ec$0$8759$ed2619ec@ptn-nntp-reader02.plus.net>

bearophileHUGS at lycos.com wrote:
> Jon Harrop:
>> OCaml's pattern matcher is very sophisticated and very fast. You'll
>> probably shrink your code by several fold whilst also having it run a few
>> orders of magnitude faster and having it statically checked, so it will
>> be more reliable.
> 
> You seem to forget some months of time to learn OCaml.

I think most people could pick up the core ideas in a day and start writing
working programs. Just read:

  http://www.ffconsultancy.com/free/ocaml
  http://www.ffconsultancy.com/products/ocaml_for_scientists/chapter1.html

> And my Python programs seem reliable enough despite being unstatically
> checked :-)

Damn. ;-)

>> You might want to look at any language with pattern matching: OCaml, SML,
>> Haskell, F#, Mathematica etc.
> 
> Mathematica pattern matching is good, but Mathematica costs a lot of
> money (and you need some time to learn it, it's not an easy system).

Mathematica is expensive but learning to use pattern matching is much easier
than learning how to write a pattern matcher and much less tedious than
reimplementing it yourself all the time (which is exactly what the OP will
end up doing).

-- 
Dr Jon D Harrop, Flying Frog Consultancy
Objective CAML for Scientists
http://www.ffconsultancy.com/products/ocaml_for_scientists/index.html?usenet


From pavlovevidence at gmail.com  Fri Jan  5 16:40:49 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 5 Jan 2007 13:40:49 -0800
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
Message-ID: <1168033249.612218.233730@s34g2000cwa.googlegroups.com>


Stef Mientki wrote:
> Not sure I wrote the subject line correct,
> but the examples might explain if not clear
>
>
> *** first attempt ***
> class pin:
>    def __init__ (self):
>      self.Name  = 'Unknown Pin'
>
> aap = pin()             # create an instance
> aap.Name = 'aap'        # set it's name
> print aap.Name          # print it's name
> 			# but why should I set it's name ??
> print 'aap'		# I can just as well print a constant string !!
>                          # (ok there will be an extra check)
>
>
> *** second attempt ***
> class pin2:
>    def __init__ (self, naam):
>      self.Name  = naam
>
> aap2 = pin2('aap2')     # seems completely redundant to me.
> print aap2.Name
> print 'aap2'
>
>
> Can this be achieved without redundancy ?

No.  Simply not possible in Python.

You should consider whether there is another opportunity to eliminate
the redundancy.  For instance, it looks like these pin definitions
might end up in a dictionary of some sort (I don't know your use case).
 You could automatically generate the keys from the names like this:

_pindefs = (
    pin("aap"),
    pin("wap"),
    pin("dcr"),
    ...
)
pins = {}
for pin in _pindefs:
    pins[pin.Name] = pin

Then you access pins["aap"].  The reason I suspect the pins will end up
in a dictionary is that, in many real applications, the pin name would
often be specified in the input.  (This is very often the case whenever
people want to know the symbol an object is bound to, for any
application.)


Carl Banks



From banaouas.medialog at wanadoo.fr  Mon Jan 22 10:16:29 2007
From: banaouas.medialog at wanadoo.fr (m.banaouas)
Date: Mon, 22 Jan 2007 16:16:29 +0100
Subject: OpenOffice 2.0 UNO update Links; need help
In-Reply-To: <mailman.2968.1169424837.32031.python-list@python.org>
References: <mailman.2968.1169424837.32031.python-list@python.org>
Message-ID: <45b4d44b$0$25921$ba4acef3@news.orange.fr>

Sells, Fred a ?crit :
> I've got a ~100 page document I assemble from ~30 OOo .odt files with some
> search and replace functions.  I then produce a PDF.  So far so good.
> 
> Now I need to get a barcode from our internal website and insert that.  The
> barcode will vary based on some parameters.  Our internal site provides a
> .jpg image (or .gif) based on those parameters.
> 
> Can anyone provide a snippet or some pointers on how to do this.  I've
> googled it to death and checked the OOo DevGuide to no avail.
> 
> Either python or java solution is acceptable.
> 
> 
you can use urllib2 python module:

# TestGoogle.py
#
import urllib2
#
f = urllib2.urlopen('http://www.google.fr/images/nav_logo.png')
data = f.read()
f = file('nav_logo.png', 'w')
f.write(data)
f.close()

in your case, may be parameters are passed thru url to get a particular 
barcode image (http://myserver/myapplication/barcode?format=xxx&id=yyy 
etc. ...).
for authentication, if any, it needs a little more sophisticated coding.


From thn at mail.utexas.edu  Tue Jan 30 19:14:24 2007
From: thn at mail.utexas.edu (Thomas Nelson)
Date: 30 Jan 2007 16:14:24 -0800
Subject: Sorting a List of Lists
In-Reply-To: <1170201351.881776.257790@q2g2000cwa.googlegroups.com>
References: <1170201351.881776.257790@q2g2000cwa.googlegroups.com>
Message-ID: <1170202464.838174.26040@a75g2000cwd.googlegroups.com>

On Jan 30, 5:55 pm, apoth... at gmail.com wrote:
> I can't seem to get this nailed down and I thought I'd toss it out
> there as, by gosh, its got to be something simple I'm missing.
>
> I have two different database tables of events that use different
> schemas. I am using python to collate these records for display. I do
> this by creating a list of lists that look roughly like this:
>
> events = [['Event URL as String', 'Event Title as String ', Event Date
> as Datetime], ...]
>
> I then thought I'd just go events.sort(lambda x,y: x[2]<y[2]) and call
> it a day. That didn't work. But then lamda functions like to be very
> simple, maybe object subscripts aren't allowed (even though I didn't
> get an error). So I wrote a comparison function that looks much as you
> would expect:
>
> def date_compare(list1,
> list2):
>     x = list1[2]
>     y = list2[2]
>     if
> x>y:
>         return
> 1
>     elif
> x==y:
>         return
> 0
>     else: #
> x<y
>         return -1
>
> But as before sorting with this function returns None.
>
> What have I overlooked?

All sorts return None.  the sort is in place.  Check your list post-
sort.

THN



From __peter__ at web.de  Tue Jan 23 03:13:21 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 23 Jan 2007 09:13:21 +0100
Subject: Is there a better way to implement this:
References: <ep2o5c$1aa$1@online.de>
	<mailman.2989.1169484766.32031.python-list@python.org>
	<1169490140.401270.226830@l53g2000cwa.googlegroups.com>
Message-ID: <ep4g2b$r02$03$1@news.t-online.com>

Paul Boddie wrote:

> Michael Yanowitz wrote:
>>
>>    I guess I am looking for something portable (both
>> Windows and Linux) where I can abort a function after
>> a certain time limit expires.
> 
> Doing a search for "timeout function Python" on Google reveals a number
> of approaches.
 
> Using threads:
> 
>   * http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/473878

That doesn't abort the calculation, however -- it just moves on with a
default value instead of the actual result if that is not available after
the specified timespan. 

The calculation may go on forever eating up resources.

Peter


From sjmachin at lexicon.net  Sun Jan  7 02:08:32 2007
From: sjmachin at lexicon.net (John Machin)
Date: 6 Jan 2007 23:08:32 -0800
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5
References: <mailman.2358.1168049310.32031.python-list@python.org>
	<459f1703$0$24039$9b622d9e@news.freenet.de>
Message-ID: <1168153712.697954.127690@i15g2000cwa.googlegroups.com>

Martin v. L?wis wrote:
> Carroll, Barry schrieb:
> > What I want to know is:
> >
> > * has anyone else encountered a problem like this, * how was the
> > problem corrected, * can the fix be retro-fitted to 2.5 and 2.4?
>
> From your description, I suspect an error in your code. Your description
> indicates that you don't expect to have more than five files open
> simultaneously. Yet, the error message "Too many open files" occurs when
> you open many more files (in the order of hundreds of files).
>
> It is very unlikely that there is a bug in Python where it would fail to
> close a file when .close() is explicitly invoked on it (as your
> description suggests that you do), so if you get that error message, it
> can only mean that you fail to close some files.

I don't understand:  the OP's description suggests nothing of the sort
to me. What he said was:
"""
In this way, a tree of Parser instances is created, each with a single
open file object.  (BTW, recursive and circular references are not
allowed.)  When each Parser instance comes to the end of its table, the
instance is explicitly destroyed, presumably destroying any objects it
holds, AND closing its open file.
"""
which I interpret as: he is doing del parser_instance, and *presuming*
(incorrectly) that attributes of parser_instance (including an open
file object) are magically whisked away instantly, instead of
later/maybe. He later says he explicitly closed the files, which fixed
what he alleges (incorrectly) to be a bug.

To the OP:
(1) The del statement doesn't "destroy" anything. It unbinds the name
from the object in the current namespace, and decrements the object's
reference count. Only if the reference count is then zero will the
janitor be called in.
(2) Check the reference count on the parser_instance just before you
del it. You could be retaining a reference somewhere.
(3) Explicitly close all non-lightweight objects like files (even
read-only ones) and sockets rather than hoping they will go away.

HTH,
John



From hanke at brailcom.org  Sat Jan  6 17:45:32 2007
From: hanke at brailcom.org (Hynek Hanke)
Date: Sat, 06 Jan 2007 23:45:32 +0100
Subject: Traceback of hanged process
Message-ID: <1168123532.3498.51.camel@chopin>


Hello,

please, how do I create a pythonic traceback from a python process that
hangs and is not running in an interpreter that I executed manually
or it is but doesn't react on CTRL-C etc? I'm trying to debug a server
implemented in Python, so I need some analog of 'gdb attach' for C. 

Unfortunatelly, googling and reading documentation revealed nothing, so
please excuse if this question is dumb.

Thank you,
Hynek Hanke




From steven.bethard at gmail.com  Sat Jan 27 13:25:28 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 27 Jan 2007 11:25:28 -0700
Subject: distutils, sdist and tests
Message-ID: <Jaudna0fMYmIBCbYnZ2dnUVZ_sKunZ2d@comcast.com>

How do I get distutils to include my testing module in just the "sdist" 
distribution?  My current call to setup() looks like::

     distutils.core.setup(
         ...
         py_modules=['argparse'],
     )

If change this to::

     distutils.core.setup(
         ...
         py_modules=['argparse', 'test_argparse'],
     )

then test_argparse.py gets included in the source distribution, but it 
also gets installed to site-packages like a normal module. I don't think 
I want that. If I change it to::

     distutils.core.setup(
         ...
         py_modules=['argparse'],
         scripts=['test_argparse.py'],
     )

then test_argparse.py gets included in the source distribution, but it 
also gets installed in the Python scripts directory. I don't think I 
want that either.

I want test_argparse.py to be available in the source distribution, but 
I don't think it should be included in the binary distributions.

Or am I just being to picky?  Do folks normally include their tests in 
the binary distributions?

STeVe


From ptmcg at austin.rr.com  Tue Jan 23 09:45:26 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 23 Jan 2007 06:45:26 -0800
Subject: How to instantiate a different class in a constructor?
In-Reply-To: <mailman.3024.1169551181.32031.python-list@python.org>
References: <mailman.3024.1169551181.32031.python-list@python.org>
Message-ID: <1169563525.644251.118250@v45g2000cwv.googlegroups.com>

On Jan 23, 5:09 am, GiBo <g... at gentlemail.com> wrote:
> Hi all,
>
> I have a class URI and a bunch of derived sub-classes for example
> HttpURI, FtpURI, HttpsURI, etc. (this is an example, I know there is
> module urllib & friends, however my actual problem however maps very
> well to this example).
>
> Now I want to pass a string to constructor of URI() and get an instance
> of one of the subclasses back. For example uri=URI('http://abcd/...')
> will make 'uri' an instance of HttpURI class, not instance of URI.
>
> To achieve this I have a list of all subclasses of URI and try to
> instantiate one by one in URI.__new__(). In the case I pass e.g. FTP URI
> to HttpURI constructor it raises ValueError exception and I want to test
> HttpsURI, FtpURI, etc.
>
> For now I have this code:
>
> =====
> class URI(object):
>         def __new__(self, arg):
>                 for subclass in subclasses:
>                         try:
>                                 instance = object.__new__(subclass, arg)
>                                 return instance
>                         except ValueError, e:
>                                 print "Ignoring: %s" % e
>                 raise ValueError("URI format not recognized" % arg)
>

<snip>

Call __new__ and subclass.__init__ explicitly:

class URI(object):
        def __new__(self, arg):
                for subclass in subclasses:
                        try:
                                instance = object.__new__(subclass)
                                instance.__init__(arg)
                                return instance
                        except ValueError, e:
                                print "Ignoring: %s" % e
                raise ValueError("URI format not recognized" % arg)

(Might I suggest 4-space indents vs. 8?)

-- Paul



From http  Fri Jan 12 18:43:43 2007
From: http (Paul Rubin)
Date: 12 Jan 2007 15:43:43 -0800
Subject: MP3 decoder module?
Message-ID: <7x4pqvste8.fsf@ruckus.brouhaha.com>

Anyone know of a reasonable mp3 decoder library I can call from
Python?  Some Googling didn't find anything too promising.  It found
Pymedia (which plays mp3's through a sound system) and any number of
utilities that parse ID3 tags and other metadata.  But I want to
actually decode the mp3 frames and crunch on the audio samples.
Basically I want to write a program that takes an mp3 audio file and
finds the silent frames, with the idea of chopping the file into
segments at those points automatically, or compressing the silences
out of spoken audio to make it play faster without chipmunking up the
pitch, etc.  Of course if you know of something that does this stuff
already, that can help too.

I think I don't need mp3 encoding, just decoding.  I want to decode
and recognize certain frames and chop them out, but the non-chopped
frames will be copied verbatim to avoid quality loss from re-encoding.

Thanks.


From bj_666 at gmx.net  Mon Jan  8 10:59:33 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 08 Jan 2007 16:59:33 +0100
Subject: Maybe a little bug of ipython 0.7.3 ?
References: <mailman.2416.1168269839.32031.python-list@python.org>
Message-ID: <pan.2007.01.08.15.59.32.744621@gmx.net>

In <mailman.2416.1168269839.32031.python-list at python.org>,
fdu.xiaojf at gmail.com wrote:

> In [8]: a = range(1000)
> 
> In [9]: a?
> Type:           list
> Base Class:     <type 'list'>
> String Form:    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 
> 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 <...> 0, 981, 98
> 2, 983, 984, 985, 986, 987, 988, 989, 990, 991, 992, 993, 994, 995, 996, 
> 997, 998, 999]
> Namespace:      Interactive
> Length:         1000
> Docstring:
>     list() -> new list
> list(sequence) -> new list initialized from sequence's items
> 
> *Please note that there is an extra "0" after "**26 <...>", which 
> doesn't appear for the followling cases:*

This 0 is the last digit of `980`.  If the string form is very long the
string itself is shortened by leaving out the middle part.  It's
irrelevant which object it was before the conversion to a string.

Ciao,
	Marc 'BlackJack' Rintsch


From duncan.booth at invalid.invalid  Mon Jan 22 03:47:44 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Jan 2007 08:47:44 GMT
Subject: html + javascript automations = [mechanize + ?? ] or
	somethingelse?
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
	<1169441279.556814.16770@38g2000cwa.googlegroups.com>
	<mailman.2978.1169445486.32031.python-list@python.org>
	<1169445833.722792.53680@a75g2000cwd.googlegroups.com>
Message-ID: <Xns98C05978B44A1duncanbooth@127.0.0.1>

"John" <weekender_ny at yahoo.com> wrote:

> I tried it, didnt work with the python25 distribution msi file that is
> on python.org
> But activestate python worked. Now I can open IE using COM. What I am
> trying
> to figure out is how to click an x,y coordinate on a page in IE
> automatically
> using COM. How about typing something automatically...Any ideas?

Don't think about clicking a coordinate or typing something; think about 
the actions on the page. e.g. to fill in a field on a form you'll want 
something like:

    	ie.document.forms[formname][fieldname].value = 'whatever'

to click a button call its click method e.g.

   submit = ie.document.forms[0]['submit']
   submit.focus()
   submit.click()

Check out the documentation at msdn.microsoft.com for the application, 
document, form etc. objects. Generally speaking anything you could have 
done through javascript you should be able to do through automation, plus a 
few of other things that javascript might have blocked for security 
reasons.



From buzzard at urubu.freeserve.co.uk  Sun Jan 14 21:00:38 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Mon, 15 Jan 2007 02:00:38 +0000
Subject: Python web app. (advice sought)
Message-ID: <45aae51b.0@entanet>

Hello,
     I find myself in the, for me, unusual (and at the moment unique)
position of having to write a web application.  I have quite a lot of
existing Python code that will form part of the business logic.  This
relies on 3rd party libraries (such as numpy) which would make porting
to e.g. IronPython difficult (I would imagine).  I was thinking LAMP
(the P standing for Python, of course), particularly as I was originally
encouraged to go for open source solutions.

The application will provide some basic statistical analyses of data
contained in database tables and associated plots (R / matplotlib /
graphviz).  There will also be some heavier duty Monte Carlo simulation
and graphical modelling / MCMC.  The user(s) will need to be able to set
model parameters; maybe even tinker with model structure, so it will be
very interactive (AJAX?).

I've had a look at Django, Turbogears and Plone, and at the moment I am
torn between Turbogears and Plone.  I get the impression that Turbogears
will require me to write more non-Python code, but maybe Plone is more
than I need (steeper learning curve?).  Maybe Turbogears will lead to a
more loosely coupled app. than Plone?

The disconcerting thing is that others on the project (who won't be
developing) have started to talk about a LAMP back end with an IIS front
end, .NET, and the benefits of sharepoint.  The emphasis is supposed to
be on rapid development, and these technologies are supposed to help.
But I have no real familiarity with them at all; just Python, C and SQL
to any realistic level of competence.

Any advice would be greatly appreciated.  I have to do much of the
statistical work too, so I need to make good choices (and hopefully be
able to justify them so nobody else on the project makes inappropriate
choices for me).  e.g. I don't mind learning Javascript if it doesn't
take too long.  The physical server will initially be a multiprocessor
machine with several GB of RAM.  But we also have a cluster (I have no
details, I only started the project a week ago).  So any advice
regarding parallelisation would also be appreciated (or, in fact, any
useful advice / pointers at all).  Thanks.

Duncan


From Art at Arthurian.com  Wed Jan 31 19:01:22 2007
From: Art at Arthurian.com (Frank Arthur)
Date: Wed, 31 Jan 2007 19:01:22 -0500
Subject: Germany issues warrants for 13 American CIA agents
References: <1170286881.262636.315770@a75g2000cwd.googlegroups.com>
Message-ID: <75awh.27298$uW.7695@bignews3.bellsouth.net>


<thermate2 at india.com> wrote in message 
news:1170286881.262636.315770 at a75g2000cwd.googlegroups.com...
> Here is the daily good news.
> ========================
Is it now 39 "American CIA agents"
or did you just posted this 3 times? 




From khemkaamit at gmail.com  Fri Jan 19 08:41:04 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Fri, 19 Jan 2007 19:11:04 +0530
Subject: How to find out if another process is using a file
In-Reply-To: <eoq9fl$ast$1@gemini.csx.cam.ac.uk>
References: <mailman.2879.1169142428.32031.python-list@python.org>
	<eoq9fl$ast$1@gemini.csx.cam.ac.uk>
Message-ID: <1360b7230701190541y3bbf3769made02659c24cfb8b@mail.gmail.com>

>
> Yes, that would work very neatly but I don't have any control over the
> writing process.  I think the modification time route might be the best
> option, but thanks to all for their replies.

Its not pythonic, but may be "lsof" on POSIX can be helpful:
see: http://www.physiol.ox.ac.uk/Computing/Online_Documentation/lsof-quickstart.txt


cheers,

-- 
----
Amit Khemka -- onyomo.com
Home Page: www.cse.iitd.ernet.in/~csd00377
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From S.Mientki-nospam at mailbox.kun.nl  Sun Jan 28 16:36:20 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sun, 28 Jan 2007 22:36:20 +0100
Subject: working model of a microcoded computer
In-Reply-To: <1170018888.634619.289950@s48g2000cws.googlegroups.com>
References: <1170018888.634619.289950@s48g2000cws.googlegroups.com>
Message-ID: <628b5$45bd173e$d443bb3a$27924@news.speedlinq.nl>

kloro wrote:
> This is somewhat off topic, but I think many programmers would be
> interested to look at a working model of a microcoded computer at:
> 
>         tomspages.com
> 
> click on the link for 'Hack the Com puter Model.' It conveys among 
> other
> things the physical events that underlie execution of a microcode
> instruction and, by extension, of machine language.
> 
> I would like very much to get people's feedback on the thing.
> 
> Thanks,
> 
> tom arnall
> north spit, ca
> usa
> 
hi Tom,

looks nice !
But probably completely written in Java ?
However, people who can handle this kind of complex circuits, can do without such a simulation :-(
But still I see a good practical use of it, for educational and debugging purposes,
if you would implement one of those small micro-controllers (e.g. PIC).

succes,
Stef Mientki



From skip at pobox.com  Mon Jan  1 09:50:57 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 1 Jan 2007 08:50:57 -0600
Subject: Collecting list of module dependencies
In-Reply-To: <45991BE2.2010803@eastlink.ca>
References: <45991BE2.2010803@eastlink.ca>
Message-ID: <17817.8145.709408.736456@montanaro.dyndns.org>


    David> Hi. Is anyone aware of any code to create a list of dependent
    David> modules for a python module.

modulefinder: http://docs.python.org/lib/module-modulefinder.html

Added to Python in 2.3.

Skip


From slow at slowhome.org  Wed Jan 10 00:36:18 2007
From: slow at slowhome.org (Julio Biason)
Date: Tue, 9 Jan 2007 21:36:18 -0800
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5 (Final report)
In-Reply-To: <7.0.1.0.0.20070109203637.0422acb8@yahoo.com.ar>
References: <2BBAEE949D384D40A2B851287ADB6A4304595A6D@eugsrv400.psc.pscnet.com>
	<7.0.1.0.0.20070109203637.0422acb8@yahoo.com.ar>
Message-ID: <20070110053618.GA24572@chiclet.dreamhost.com>

[Kinda stealing the thread]

On Tue, Jan 09, 2007 at 09:05:30PM -0300, Gabriel Genellina wrote:
> And do you actually need so many open files simultaneously?
> Try to close them explicitely when you finish working on them - do 
> not rely on GC for closing files. This has *always* been the 
> recomended practice (except maybe, inside a short script that 
> finishes quickly).

If I use a file() in a for, how to I explicitely close the file?

<code>
for line in file('contents'):
   print line
</code>

Would this work like the new 'with' statement or it will only be closed
when the GC finds it?

--
Julio "slow" Biason <slow at slowhome.org>


From horpner at yahoo.com  Wed Jan 10 10:10:12 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Jan 2007 16:10:12 +0100
Subject: An iterator with look-ahead
References: <slrneq9ubo.bg.horpner@FIAD06.norwich.edu>
	<mailman.2533.1168440514.32031.python-list@python.org>
Message-ID: <slrneqa0je.16s.horpner@FIAD06.norwich.edu>

On 2007-01-10, Fredrik Lundh <fredrik at pythonware.com> wrote:
> if you're doing simple parsing on an iterable, it's easier and
> more efficient to pass around the current token and the
> iterator's next method:
>
> http://online.effbot.org/2005_11_01_archive.htm#simple-parser-1

Thank you. Much better.

-- 
Neil Cerutti


From half.italian at gmail.com  Thu Jan 25 06:58:40 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 25 Jan 2007 03:58:40 -0800
Subject: My Tkinter Threading nightmare
In-Reply-To: <7xac07wzh2.fsf@ruckus.brouhaha.com>
References: <1169693266.209082.323310@a75g2000cwd.googlegroups.com>
	<7x1wljajgg.fsf@ruckus.brouhaha.com>
	<7xac07wzh2.fsf@ruckus.brouhaha.com>
Message-ID: <1169726320.703566.272120@k78g2000cwa.googlegroups.com>


On Jan 24, 7:35 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Paul Rubin <http://phr... at NOSPAM.invalid> writes:
> >       def idle(self):
> >          # read and execute any commands waiting on the queue
> >          while True:
> >             try:
> >                func, args, kw = self.cmd_queue.get(block=False)
> >             except QueueEmpty:
> >                return
> >             func (*args, **kw)Whoops, I forgot, you have to set up the after event again at the end
> of this:
>
>        def idle(self):
>           # read and execute any commands waiting on the queue
>           while True:
>              try:
>                 func, args, kw = self.cmd_queue.get(block=False)
>              except QueueEmpty:
>                 return
>              func (*args, **kw)
>           self.after(20, self.idle)

Thanks Paul.  That has made more sense than all of my scrounging
combined, but I still need to mess around with the idea and code some.
How can I put something like the window delete into the command queue?
Isn't window.protocol() just binding the close window button to a
function?

I'll look deeper and experiment and try to make sense of it once again
tomorrow.  :)

~Sean



From pretoriano_2001 at hotmail.com  Mon Jan  8 13:52:25 2007
From: pretoriano_2001 at hotmail.com (vizcayno)
Date: 8 Jan 2007 10:52:25 -0800
Subject: Recommendations (or best practices) to define functions (or
	methods)
In-Reply-To: <mailman.2433.1168276936.32031.python-list@python.org>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
	<45A1F1D9.8070206@v.loewis.de>
	<1168262749.852897.13010@q40g2000cwq.googlegroups.com>
	<mailman.2433.1168276936.32031.python-list@python.org>
Message-ID: <1168282345.456346.103590@q40g2000cwq.googlegroups.com>

Thank you for your guidelines and for changing my mind. I am trying to
do my best in generating good code and, in that attempt ... I only know
that nothing know.
Regards.



From tim at tdw.net  Mon Jan 15 04:32:31 2007
From: tim at tdw.net (Tim Williams)
Date: Mon, 15 Jan 2007 09:32:31 +0000
Subject: Python web app. (advice sought)
In-Reply-To: <R62949312.665.5091.1@mxextra>
References: <45aae51b.0@entanet> <R62949312.665.5091.1@mxextra>
Message-ID: <9afea2ac0701150132q28a49cbfy366fbc01862a4445@mail.gmail.com>

On 15 Jan 2007 00:52:33 -0800, Torabisu <tpawley at gmail.com> wrote:
>
> Duncan Smith wrote:
> > Hello,
> >      I find myself in the, for me, unusual (and at the moment unique)
> > position of having to write a web application.  I have quite a lot of
> > existing Python code that will form part of the business logic.  This
> > relies on 3rd party libraries (such as numpy) which would make porting
> > to e.g. IronPython difficult (I would imagine).  I was thinking LAMP
> > (the P standing for Python, of course), particularly as I was originally
> > encouraged to go for open source solutions.
> >
> > The application will provide some basic statistical analyses of data
> > contained in database tables and associated plots (R / matplotlib /
> > graphviz).  There will also be some heavier duty Monte Carlo simulation
> > and graphical modelling / MCMC.  The user(s) will need to be able to set
> > model parameters; maybe even tinker with model structure, so it will be
> > very interactive (AJAX?).
> >
> > I've had a look at Django, Turbogears and Plone, and at the moment I am
> > torn between Turbogears and Plone.  I get the impression that Turbogears
> > will require me to write more non-Python code, but maybe Plone is more
> > than I need (steeper learning curve?).  Maybe Turbogears will lead to a
> > more loosely coupled app. than Plone?
> >
> > The disconcerting thing is that others on the project (who won't be
> > developing) have started to talk about a LAMP back end with an IIS front
> > end, .NET, and the benefits of sharepoint.  The emphasis is supposed to
> > be on rapid development, and these technologies are supposed to help.
> > But I have no real familiarity with them at all; just Python, C and SQL
> > to any realistic level of competence.
> >
> > Any advice would be greatly appreciated.  I have to do much of the
> > statistical work too, so I need to make good choices (and hopefully be
> > able to justify them so nobody else on the project makes inappropriate
> > choices for me).  e.g. I don't mind learning Javascript if it doesn't
> > take too long.  The physical server will initially be a multiprocessor
> > machine with several GB of RAM.  But we also have a cluster (I have no
> > details, I only started the project a week ago).  So any advice
> > regarding parallelisation would also be appreciated (or, in fact, any
> > useful advice / pointers at all).  Thanks.
> >
> > Duncan
>
> I was in a similar boat a while back, needing to make a decision on
> what to use for our web development.  I had worked with Plone
> previously and found that for our needs it wasn't going to work.  Our
> web development was quite specific and didn't fit ideally into the
> standard content management realm.  I also looked at Django and
> TurboGears, installing and working with each.  I eventually went with
> Django, and I've really enjoyed working with it.  Was a personal choice
> and I'm sure our development would have been as successful if I'd
> chosen TurboGears.
>
> If you want the strength of persistent layers, MVC, templating etc etc
> but want to stay away from the heavier frameworks, another possibility
> is http://webpy.org/.  Very simple to implement, lightweight yet still
> fairly full of features.
>

Don't overlook Karrigell either,  with a tiny learning curve its
always worth consideration, especially if you need rapid development
and a web server that will sit on top of your exising .py modules.

www.karrigell.com

hth :)


From gblais at cox.net  Mon Jan  1 13:47:16 2007
From: gblais at cox.net (gblais at cox.net)
Date: Mon, 1 Jan 2007 18:47:16 GMT
Subject: Wow, Python much faster than MatLab
References: <mailman.2150.1167489669.32031.python-list@python.org> 
Message-ID: <NGcmh.5542$hr3.1562@newsfe24.lga>

We're not so far apart.

I've used SAS or 25 years, and R/S-PLUS for 10.

I think you've said it better than I did, though: R requires more attention
(which is often needed).

I certainly didn't mean that R crashed - just an indictment of how much I
thought I was holding in my head.

Gerry


From robert.kern at gmail.com  Sun Jan 28 00:51:10 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 27 Jan 2007 23:51:10 -0600
Subject: distutils, sdist and tests
In-Reply-To: <Ka6dnVhMa4-CqyHYnZ2dnUVZ_syunZ2d@comcast.com>
References: <Jaudna0fMYmIBCbYnZ2dnUVZ_sKunZ2d@comcast.com>	<mailman.3235.1169934632.32031.python-list@python.org>	<udOdnWW5l4N-jCHYnZ2dnUVZ_v-tnZ2d@comcast.com>	<mailman.3237.1169954787.32031.python-list@python.org>
	<Ka6dnVhMa4-CqyHYnZ2dnUVZ_syunZ2d@comcast.com>
Message-ID: <ephdkf$tpp$1@sea.gmane.org>

Steven Bethard wrote:
> Robert Kern wrote:

>> Are you sure that you don't have changes left over in your setup.py when you
>> tested that?
> 
> Yep.  (Though I still cleared everything out and tried it again.) 
> Here's what I got using an unmodified setup.py and the MANIFEST.in you 
> suggested.  Note that the "bdist" version is putting test_argparse.py 
> into site-packages.

>  > python setup.py bdist_dumb
> running bdist_dumb
> running build
> running build_py
> installing to build\bdist.win32\dumb
> running install
> running install_lib

Are you sure that you removed the build/ directory? Because if it wasn't there,
distutils would say that it was creating one:

[argparse]$ python setup.py bdist_dumb
running bdist_dumb
running build
running build_py
creating build
creating build/lib
copying argparse.py -> build/lib
installing to build/bdist.macosx-10.3-fat/dumb
running install
running install_lib

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From gagsl-py at yahoo.com.ar  Wed Jan  3 20:57:50 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 03 Jan 2007 22:57:50 -0300
Subject: code optimization (calc PI) / Full Code of PI calc in
	Python and C.
In-Reply-To: <cuYmh.201$9v1.239@nntpserver.swip.net>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
	<459BFDCB.4000503@sschwarzer.net>
	<UGXmh.194$9v1.250@nntpserver.swip.net>
	<1167872076.937415.250340@11g2000cwr.googlegroups.com>
	<cuYmh.201$9v1.239@nntpserver.swip.net>
Message-ID: <7.0.1.0.0.20070103222616.0569cd80@yahoo.com.ar>

At Wednesday 3/1/2007 22:10, Michael M. wrote:

>Ok, here is the code. It is a translation of the following code, found
>on the internet.
>
>* The C is very fast, Python not.
>* Target: Do optimization, that Python runs nearly like C.

Why? Python is strong in other aspects, *not* on computation speed.

Anyway, for a nice and rather fast Python implementation (yielding 
unlimited digits *without* unlimited storage), see 
http://mail.python.org/pipermail/python-list/2006-November/414347.html
The code, for reference:

def pi():
      k, a, b, a1, b1 = 2, 4, 1, 12, 4
      while 1:
          # Next approximation
          p, q, k = k*k, 2*k+1, k+1
          a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
          # Yield common digits
          d, d1 = a/b, a1/b1
          while d == d1:
              yield str(d)
              a, a1 = 10*(a%b), 10*(a1%b1)
              d, d1 = a/b, a1/b1

import sys
sys.stdout.writelines(pi())

(The converted C code does a lot of nonsense in Python terms - maybe 
you should try to interpret *what* it does and then reimplement that 
using Python)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From bbands at gmail.com  Fri Jan 26 17:49:23 2007
From: bbands at gmail.com (BBands)
Date: 26 Jan 2007 14:49:23 -0800
Subject: time series data and NumPy
In-Reply-To: <mailman.3210.1169837227.32031.python-list@python.org>
References: <1169830757.220964.196540@m58g2000cwm.googlegroups.com>
	<51us3uF1mdcpsU1@mid.uni-berlin.de>
	<mailman.3210.1169837227.32031.python-list@python.org>
Message-ID: <1169851763.205104.63450@m58g2000cwm.googlegroups.com>

On Jan 26, 10:46 am, Robert Kern <robert.k... at gmail.com> wrote:
> Yes, one can make numpy arrays with "object" as its type. One can even extend
> the C-level parts as well. For example, we have an experimental package in the
> scipy sandbox for uniform time series that uses mx.DateTime.
>
>  http://www.scipy.org/TimeSeriesPackage

I saw that, but I am working with irregular time series.

> This is frequently what I do. For dates, I like Modified Julian Day Numbers
> although I am sure that would horrify some people more knowledgeable than I.

Not horrified, just doing it. ;-)

     jab



From mail at microcorp.co.za  Sun Jan 14 00:38:51 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 14 Jan 2007 07:38:51 +0200
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org><50fudtF1g1nplU1@mid.individual.net><envur1$rq1$1@gemini.csx.cam.ac.uk><mailman.2480.1168350033.32031.python-list@python.org><Xns98B384E126F4Ctim111one@216.196.97.136><eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136><eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org><eo7kdf$a80$1@gemini.csx.cam.ac.uk
	<eoabbl$270$1@gemini.csx.cam.ac.uk>
Message-ID: <004a01c7379e$466f2cc0$03000080@hendrik>

"Nick Maclaren" <nmm1 at cus.cam.ac.uk> wrote:

> The "cheap" means "cheap in hardware" - it needs very little logic,
> which is why it was used on the old, discrete-logic, machines.
> 
> I have been told by hardware people that implementing IEEE 754 rounding
> and denormalised numbers needs a horrific amount of logic - which is
> why only IBM do it all in hardware.  And the decimal formats are
> significantly more complicated.
> 
> What I don't know is how much precision this approximation loses when
> used in real applications, and I have never found anyone else who has
> much of a clue, either.
> 
I would suspect that this is one of those questions which are simple
to ask, but horribly difficult to answer - I mean - if the hardware has 
thrown it away, how do you study it - you need somehow two
different parallel engines doing the same stuff, and comparing the 
results, or you have to write a big simulation, and then you bring 
your simulation errors into the picture - There be Dragons...

- Hendrik



From stephen at theboulets.net  Sun Jan 21 22:30:40 2007
From: stephen at theboulets.net (stephen_b)
Date: 21 Jan 2007 19:30:40 -0800
Subject: Help with 'popen'
Message-ID: <1169436640.161806.111510@38g2000cwa.googlegroups.com>

Can someone let me know why this won't work? Thanks.

>>> from os import popen
>>> popen('export asdfasdf=hello').read()
''
>>> popen('echo $asdfasdf').read()
'\n'

Thanks.

Stephen



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Jan  4 11:35:01 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 04 Jan 2007 17:35:01 +0100
Subject: Best way to implement a timed queue?
References: <mailman.2284.1167921061.32031.python-list@python.org>
Message-ID: <504ollF1enbn0U1@mid.individual.net>

Thomas Ploch wrote:

> I am having troubles with implementing a timed queue. I am using
> the 'Queue' module to manage several queues. But I want a timed
> access, i.e. only 2 fetches per second max. I am horribly stuck on
> even how I actually could write it. Has somebody done that before?
> And when yes, how is the best way to implement it?

If you use an event loop system you could derive a class from your
queue class whose "pop" method only returns an element if some
timer has run out. After the maximum number of fetches you'd have
to reset the timer.

Regards,


Bj?rn

-- 
BOFH excuse #327:

The POP server is out of Coke



From nagle at animats.com  Sun Jan 14 22:25:01 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 15 Jan 2007 03:25:01 GMT
Subject: How naive is Python?
Message-ID: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>

    How naive (in the sense that compiler people use the term)
is the current Python system?  For example:

	def foo() :
	    s = "This is a test"
	    return(s)

         s2 = foo()

How many times does the string get copied?

Or, for example:

         s1 = "Test1"
	s2 = "Test2"
	s3 = "Test3"
	s = s1 + s2 + s3

Any redundant copies performed, or is that case optimized?

How about this?

	kcount = 1000
	s = ''
	for i in range(kcount) :
	    s += str(i) + ' '

Is this O(N) or O(N^2) because of recopying of "s"?

I just want a sense of what's unusually inefficient in the
current implementation.  Thanks.

				John Nagle


From webraviteja at gmail.com  Mon Jan  8 20:26:27 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 8 Jan 2007 17:26:27 -0800
Subject: Network failure when using urllib2
In-Reply-To: <1168302603.565442.113760@v33g2000cwv.googlegroups.com>
References: <1168292352.349983.139260@i15g2000cwa.googlegroups.com>
	<1168301738.984509.3030@38g2000cwa.googlegroups.com>
	<1168302603.565442.113760@v33g2000cwv.googlegroups.com>
Message-ID: <1168305987.647165.21720@42g2000cwt.googlegroups.com>


jdvolz at gmail.com wrote:
> I am fetching different web pages (never the same one) from a web
> server.  Does that make a difference with them trying to block me?
> Also, if it was only that site blocking me, then why does the internet
> not work in other programs when this happens in the script.  It is
> almost like something is seeing a lot of traffic from my computer, and
> cutting it off thinking it is some kind of virus or worm.  I am
> starting to suspect my firewall.  Anyone else have this happen?
>
> I am going to read over that documentation you suggested to see if I
> can get any ideas.  Thanks for the link.
>
> Shuad

No! What I suggested should not effect traffic from other servers. I
would go with Gabriel's suggestion and check for open connections just
in case. Although I can't imagine why that would give you a 404
response since it is a server response (implies successful connection).
I would expect that you would get a client error in such a case.

Of course, you can always rule out your suspicions of local conditions
(turn off security software briefly or try from a different machine)
unless your ISP is implementing safeguards against DOS attacks from
their network with normal users in mind.

Ravi Teja.



From john106henry at hotmail.com  Fri Jan  5 15:32:13 2007
From: john106henry at hotmail.com (John Henry)
Date: 5 Jan 2007 12:32:13 -0800
Subject: Learning to program in Python
In-Reply-To: <1168028517.005902.172880@11g2000cwr.googlegroups.com>
References: <1168028517.005902.172880@11g2000cwr.googlegroups.com>
Message-ID: <1168029133.866590.43770@i15g2000cwa.googlegroups.com>


jbchua wrote:
> Hello everybody.
>
> I am an Electrical Engineering major and have dabbled in several
> languages such as Python, C, and Java in my spare time because of my
> interest in programming. However, I have not done any practical
> programming because I have no idea where to get started. I taught
> myself these languages basically by e-tutorials and books. This makes
> me feel as if I don't really know how to implement these languages.
> Does anybody have any advice on where to start applying my limited
> knowledge practically in order to advance my learning?

Which area of EE are you in?  Or just starting on that as well?

If you're just starting, chanllege yourself to build a R mesh and
calculate the Thevenin equivalent looking out from a particular node.
Then you can expand that to an RLC network.

Besure to use Objects, think in terms of objects, and code in objects.
 Don't hard code the data type.  You'll be able to see how magical the
Duck Typing is in Python.

Have fun.



From __peter__ at web.de  Tue Jan 30 08:18:58 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 30 Jan 2007 14:18:58 +0100
Subject: error messages containing unicode
References: <1170122515.980168.150960@p10g2000cwp.googlegroups.com>
	<pan.2007.01.30.02.48.10.853852@REMOVEME.cybersource.com.au>
	<1170160464.576122.62230@h3g2000cwc.googlegroups.com>
	<528sn0F1nhkoiU1@mid.uni-berlin.de>
	<1170162459.577853.282090@l53g2000cwa.googlegroups.com>
Message-ID: <epngj2$sv9$03$1@news.t-online.com>

Jim wrote:

> On Jan 30, 7:41 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
>> >> (2) convert the file name to ASCII before you store it; or
>> > I need the non-ascii information, though, which is why I included it
>> > in the error message.
>> Then convert it to utf-8, or some encoding you know it will be used by
>> your terminal.
> Thank you for the suggestion.   Remember please that I am asking for a
> safe way to pull the unicode object from the exception object (derived
> from a Python built-in), so I can't store it as unicode first and then
> convert to regular string  when I need to print it out-- my exact
> question is how to get the unicode.  So I take your answer to be to
> refuse to put in a unicode-not-ascii in there in the first place.
> 
> It then seems to me that you are saying that the best practice is that
> every function definition should contain a parameter, like so.
> 
>   def openNewFile(fn,errorEncoding='utf-8'):
>        :
>       try:
>            open(fn,'r')
>       except Exception, err
>            raise myException 'unable to open
> '+fn.encode(errorEncoding,'replace')
> 
> I guess that beyond that passing those parameters and putting encode
> on every variable in my routines that occurs in an error message it is
> ugly, it seems to me that it violates the principle that you should do
> everything inside the program in unicode and only encode at the
> instant you need the output, in that the exception object is carrying
> around an ascii-not-unicode object.

Printing to a terminal should work:

>>> try:
...     raise Exception(u"gew?hnlich ?hnlich ?blich")
... except Exception, e:
...     print e.message
...
gew?hnlich ?hnlich ?blich

If you're writing to a file you still have to encode explicitly.

Peter


From steve at REMOVEME.cybersource.com.au  Mon Jan 15 22:02:05 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 16 Jan 2007 14:02:05 +1100
Subject: Conflicting needs for __init__ method
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<mailman.2741.1168898073.32031.python-list@python.org>
Message-ID: <pan.2007.01.16.03.02.03.4711@REMOVEME.cybersource.com.au>

On Tue, 16 Jan 2007 08:54:09 +1100, Ben Finney wrote:

> dickinsm at gmail.com writes:
> 
>> Suppose you're writing a class "Rational" for rational numbers.  The
>> __init__ function of such a class has two quite different roles to
>> play.
> 
> That should be your first clue to question whether you're actually
> needing separate functions, rather than trying to force one function
> to do many different things.

[snip]

> All of this points to having a separate constructor function for each
> of the inputs you want to handle.

[snip]

> The alternate constructors are decorated as '@classmethod' since they
> won't be called as instance methods, but rather:
> 
>     foo = Rational.from_string("355/113")
>     bar = Rational.from_int(17)
>     baz = Rational.from_rational(foo)

That's one way of looking at it. Another way is to consider that __init__
has one function: it turns something else into a Rational. Why should the
public interface of "make a Rational" depend on what you are making it
from?

Think of built-ins like str() and int(). I suggest that people would be
*really* unhappy if we needed to do this:

str.from_int(45)
str.from_float(45.0)
str.from_list([45, 45.5])
etc.

Why do you consider that Rationals are different from built-ins in this
regard?


>         def __add__(self, other):
>             result = perform_addition(self, other)
>             return result

But that could just as easily be written as:

    def __add__(self, other):
        return perform_addition(self, other)

which then raises the question, why delegate the addition out of __add__
to perform_addition? There is at least three distinct costs: a larger
namespace, an extra function to write tests for; and an extra method
call for every addition. What benefit do you gain? Why not put the
perform_addition code directly in __add__?

Just creating an extra layer to contain the complexity of rational
addition doesn't gain you anything -- you haven't done anything to reduce
the complexity of the problem, but you have an extra layer to deal with.

And you still haven't dealt with another problem: coercions from other
types. If you want to be able to add Rationals to (say) floats, ints and
Rationals without having to explicitly convert them then you need some
method of dispatching to different initialiser methods. (You should be
asking whether you really do need this, but let's assume you do.)

Presumably you create a method Rational.dispatch_to_initialisers that
takes any object and tries each initialiser in turn until one succeeds,
then returns the resultant Rational. Or you could just call it
Rational.__init__.

This doesn't mean that __init__ must or even should contain all the
initialisation logic -- it could dispatch to from_string, from_float and
other methods. But the caller doesn't need to call the individual
initialisers -- although of course they are public methods and can be
called if you want -- since __init__ will do the right thing.


-- 
Steven D'Aprano 



From horpner at yahoo.com  Thu Jan 11 14:18:29 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 11 Jan 2007 20:18:29 +0100
Subject: passing a variable to an external program
References: <1168542633.290682.267570@77g2000hsv.googlegroups.com>
Message-ID: <slrneqd3h7.144.horpner@FIAD06.norwich.edu>

On 2007-01-11, Rich <richfahey at gmail.com> wrote:
> I want to run an external program using os.system() but I want to
> include a variable in the middle of the command line.
>
> An example of the type of thing I want to be able to do:
> pathname = os.path.dirname(sys.argv[0])
> os.system('cscript /nologo ' + pathname + '\test.vbs')

Use / instead of \, or \\ instead of \.

-- 
Neil Cerutti
Ushers will eat latecomers. --Church Bulletin Blooper


From steve at REMOVEME.cybersource.com.au  Mon Jan 29 20:59:39 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 30 Jan 2007 12:59:39 +1100
Subject: Random passwords generation (Python vs Perl) =)
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<epl3la$10g0$1@ulysses.news.tiscali.de>
	<1170088693.768440.26580@h3g2000cwc.googlegroups.com>
Message-ID: <pan.2007.01.30.01.59.39.576768@REMOVEME.cybersource.com.au>

On Mon, 29 Jan 2007 08:38:13 -0800, Szabolcs Nagy wrote:

>>> why use xrange? range is faster and simpler for small ranges

That is not true.

>>> import timeit
>>> timeit.Timer("range(50)", "").repeat()
[2.8599629402160645, 2.8296849727630615, 2.8609859943389893]
>>> timeit.Timer("xrange(50)", "").repeat()
[1.1806831359863281, 1.3563210964202881, 1.1632850170135498]

>>> timeit.Timer("range(5)", "").repeat()
[1.7963159084320068, 1.5487189292907715, 1.5596699714660645]
>>> timeit.Timer("xrange(5)", "").repeat()
[1.158560037612915, 1.1807279586791992, 1.1769890785217285]

There is very little reason to use range() unless you actually need the
entire list in one go. In fact, in Python 3.0, the existing range() will
be removed and xrange() will be renamed range().




-- 
Steven D'Aprano 



From weekender_ny at yahoo.com  Tue Jan 16 00:16:53 2007
From: weekender_ny at yahoo.com (John)
Date: 15 Jan 2007 21:16:53 -0800
Subject: installing/maintaining modules for multiple versions of python
Message-ID: <1168924613.732835.83570@l53g2000cwa.googlegroups.com>


I have a suse box that has by default python 2.4 running and I have a
2.5 version installed
in /reg/python2.5. How do I install new modules for only 2.5 without
disturbing the 2.4 default
installation. 

Thanks,
--j



From larry at hastings.org  Wed Jan 10 19:40:40 2007
From: larry at hastings.org (Larry Hastings)
Date: 10 Jan 2007 16:40:40 -0800
Subject: How to use Mercurial for local source code management with a public
	Subversion server
Message-ID: <1168476040.459124.172200@77g2000hsv.googlegroups.com>



I'm working on a patch or two for Python.  Now, it's always best to use
a source code manager (rcs, whatever) when writing code; in particular
it'd make updating to the latest Python trees much easier.  But I don't
have write access to the Python Subversion repository.  So I figured
out how to work purely locally with Mercurial.

I wrote a long(ish) how-to blog entry about it,  .  It's currently the
top entry, here:
http://www.momentaryfascinations.com/
Figuring out *how* to do it was the hard part; it's actually pretty
easy to set up and use.  And *very* pleasant to work with!  If you're
working on patches for Python, I highly recommend you work using
something like this.  (Maybe even if you *do* have write permission!)

I considered posting this in the Python-Dev mailing list, as that's
really the target audience, but I wasn't sure the message would be
happily received by its subscribers.

Cheers,


/larry/



From karyn at calarts.edu  Fri Jan 12 16:14:10 2007
From: karyn at calarts.edu (Karyn Williams)
Date: Fri, 12 Jan 2007 13:14:10 -0800
Subject: What is a perl hash in python
In-Reply-To: <fPQph.10106$yx6.6344@newsread2.news.pas.earthlink.net>
References: <8301441.post@talk.nabble.com>
	<mailman.2653.1168622715.32031.python-list@python.org>
Message-ID: <3.0.1.32.20070112131410.015b67e0@muse.calarts.edu>

At 06:54 PM 1/12/07 GMT, you wrote:
>On Fri, 12 Jan 2007 09:15:44 -0800, Karyn Williams <karyn at calarts.edu>
>declaimed the following in comp.lang.python:
>
>> I am new to Pyton. I am trying to modify and understand a script someone
>> else wrote. I am trying to make sense of the following code snippet. I know
>
>	"someone else" didn't write Python either, looking at that mishmash
><G>

Thanks, Marc and Dennis. 

Actually as I think about it, this operation should be able to be done in
one loop, not the ten or so that it is currently taking. 


Read in a file "*.log" (excluding certain named files "1.log"), total up x
number of rows of the 2nd and third columns, push (filename, total col2)
(filename, total col 3) to two lists, sort -r and generate one web page
each with the top ten.

That is what this script is supposed to be doing.

>> line 7 would be best coded with regex. I first would like to understand
>> what was coded originally. thelistOut looks like a hash to me (I'm more
>> familiar with perl). Perhaps someone could translate from perl to python
>> for me - not in code but just in concept.
>> 
>> 
>> Here is the code. This script is reading the list thelistOut and then
>> removing any items in RSMlist and taking the remainder and putting them in
>> graphAddressOut with the formatting.
>> 
>> This is a SAMPLE of what is in the lists referenced below in the loop:
>> 
>> 
>> thelistOut = [(632,
>> ['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_9.log']), (145,
>> ['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_13.log']), (0,
>> ['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_5.log'])]
>>
>
>	This is a list containing three elements. Each element is a tuple
>containing two sub-elements. The first sub-element appears to be an
>integer (I have no idea of the significance of the value at this time).
>The second sub-element is another list containing a single
>sub-sub-element -- that sub-sub-element is a string (file path name).
> 
>> RSMList = ['172.16.0.1_1', '172.16.0.1_2', '172.16.0.1_3', '172.16.0.1_4',
>> '172.16.0.1_5']
>> 
>> 
>> 
>> #--------------------------Loop 1 -------------------------
>>        
>>     w = 0
>>     while w < 45:
>>
>	for w in xrange(45):
>        
>>        fileOut = string.split(thelistOut[w][1][0],".log")
>>        fileOutSplitedCommon = string.split(fileOut[0], "main/")
>>        fileOut2D = string.split(fileOutSplitedCommon[1], "/")
>>        fileOut = string.split(fileOut[0],"data-dist")
>>
>	Direct use of the string module is now frowned upon. 


For future reference, why is direct use of the string module frowned upon,
and what does one use instead ? 


>Also, since these are file path names, using operations in the os.path
module would
>be more appropriate...


I'll look into os.path, but what this loop should be doing is matching and
removing the entries from thelistOut ( and thelistIn ) 
that are listed in RSMlist. Or as is being done, not writing them to the
new list, outputOut (graphAddressOut). 
Its just a matching operation, not really a path/filename op. This is why I
will be changing this to a regex.


>>        if fileOut2D[1] in RSMList:
>>           w = w + 1
>>           continue
>
>	Confusing logic, having two places where "w" is incremented. Using a
>"for" loop would mean neither increment statement is needed. Actually,
>"w" isn't even needed, replace the while/for with
>
>	for fid in thelistOut:
>		fileOut = fid[1][0]	#that [1] is getting the second element of
>
>the tuple, and the [0] gets the string out of that list (why a list of
>one element string data?)
>
>>        graphAddressOut = tag1 + logUrl + fileOut[1] + extention1 + tag2 +
>> "<b>SWITCH: " + string.swapcase(fileOut2D[0]) + "&nbsp;&nbsp;&
>> nbsp;PORT ID: " + fileOut2D[1] + "</b><br>" + imgTitleTag + imgTag1 +
>> logUrl + fileOut[1] + extention2 + imgTag2 + tag3 + tag5
>
>	This could be cleaned up too, but I'll ignore it at the moment.
>
>>        outputOut.append(graphAddressOut)
>>        strOut = strOut + graphAddressOut
>> 
>>        w = w + 1
>> 
>> #--------------------------Loop 1 -------------------------
>
>
>	I think what you call a "hash" in PERL is a dictionary in Python:
>
>dct = { key1 : value1, ... , keyn : valuen }
>
>aval = dct[keyx]
>
>	Nothing of the sort used in the code you show above.



-- 

Karyn Williams
Network Services Manager
California Institute of the Arts
karyn at calarts.edu
http://www.calarts.edu/network


From wpeloqui at gmail.com  Thu Jan 18 20:44:30 2007
From: wpeloqui at gmail.com (Willie)
Date: 18 Jan 2007 17:44:30 -0800
Subject: Using lambda with a Pmw.ComboBox
In-Reply-To: <eop52k$tjf$1@zinnia.noc.ucla.edu>
References: <1169167034.200565.227900@a75g2000cwd.googlegroups.com>
	<eop52k$tjf$1@zinnia.noc.ucla.edu>
Message-ID: <1169171070.474661.9380@l53g2000cwa.googlegroups.com>

I will post a sample tomorrow AM.

James Stroud wrote:
> Can you show us your code? Your question is ambiguous to me. Comboboxes
> do not hold widgets but display text.



From bj_666 at gmx.net  Wed Jan 10 02:53:17 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 10 Jan 2007 08:53:17 +0100
Subject: Question: Best Practice? (module 'shelve')
References: <45A438AE.10105@gmx.net>
	<mailman.2507.1168390525.32031.python-list@python.org>
Message-ID: <pan.2007.01.10.07.53.16.971223@gmx.net>

In <mailman.2507.1168390525.32031.python-list at python.org>, Thomas Ploch
wrote:

>> I just wanted to know, if there is any best practice concerning
>> following code:
>> 
>> [?]
>>
>>     def match(self, src, url):
>>         self.matchDict = {}
>>         self.matchDict[url] = {}
>> 	# The next 2 functions just add stuff to self.matchDict
>>         if self.email:
>>             self._addEmails(src, url)
>>         self._addPatterns(src, url)
>> 	# Is it good practice to open, write and close the db straight
>> 	# away? Or is it better to leave it open until the whole program
>> 	# has finished, and close it then?
>>         self.openDB(self.dbName)
>>         self.db[url] = self.matchDict[url]
>>         self.db.close()
>> 	# I want to del the matchDict each time so it can't grow big.
>> 	# Is this good, or should it be left open, too?
>>         del self.matchDict


Opening an closing the DB costs time but makes sure everything is flushed
to the file.  At least from the applications point of view.  The data
may be still cached by the operating system before actually being written
to the file.

Do you have `self.matchDict` just for communicating between those two
methods?  Why don't you use arguments and return values and a local name?

def match(self, src, url):
    match_dict = dict()
    if self.email:
        match_dict.update(self._add_emails(src, url))
    match_dict.update(self._addPatterns(src, url))

    self.open_db()
    self.db[url] = match_dict
    self.db.close()

It's a bit shorter and `match_dict` goes out of scope automatically when
the method finishes.

Clearing `self.matchDict` doesn't buy you much anyway.  At least not what
the comment suggests because it doesn't grow anymore after the end of the
method.  The first action in the next call is binding the attribute to a
fresh dictionary.

>>     def openDB(self, dbName=None, modeflag='c'):
>>         if dbName == None:
>>             self.db = shelve.open('textmatch.db', flag=modeflag)
>>         else:
>>             self.db = shelve.open(dbName, flag=modeflag)

def open_db(self, db_name='textmatch.db', modeflag='c'):
    self.db = shelve.open(db_name, flag=modeflag)

Ciao,
	Marc 'BlackJack' Rintsch


From oyekomova at hotmail.com  Sun Jan 14 12:56:34 2007
From: oyekomova at hotmail.com (oyekomova)
Date: 14 Jan 2007 09:56:34 -0800
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
	<eo78ah$dqc$1@sea.gmane.org>
	<mailman.2633.1168583356.32031.python-list@python.org>
	<1168715634.695961.14710@l53g2000cwa.googlegroups.com>
	<1168728465.178605.218850@q2g2000cwa.googlegroups.com>
	<1168735174.140171.74930@v45g2000cwv.googlegroups.com>
	<1168756624.569930.168990@51g2000cwl.googlegroups.com>
Message-ID: <1168797394.119395.303060@q2g2000cwa.googlegroups.com>

Thank you so much. Your solution works!  I greatly appreciate your
help.




sturlamolden wrote:
> oyekomova wrote:
>
> > Thanks for your note. I have 1Gig of RAM. Also, Matlab has no problem
> > in reading the file into memory. I am just running Istvan's code that
> > was posted earlier.
>
> You have a CSV file of about 520 MiB, which is read into memory. Then
> you have a list of list of floats, created by list comprehension, which
> is larger than 274 MiB. Additionally you try to allocate a NumPy array
> slightly larger than 274 MiB. Now your process is already exceeding 1
> GiB, and you are probably running other processes too. That is why you
> run out of memory.
>
> So you have three options:
>
> 1. Buy more RAM.
>
> 2. Low-level code a csv-reader in C.
>
> 3. Read the data in chunks. That would mean something like this:
>
>
> import time, csv, random
> import numpy
>
> def make_data(rows=6E6, cols=6):
>     fp = open('data.txt', 'wt')
>     counter = range(cols)
>     for row in xrange( int(rows) ):
>         vals = map(str, [ random.random() for x in counter ] )
>         fp.write( '%s\n' % ','.join( vals ) )
>     fp.close()
>
> def read_test():
>     start  = time.clock()
>     arrlist = None
>     r = 0
>     CHUNK_SIZE_HINT = 4096 * 4 # seems to be good
>     fid = file('data.txt')
>     while 1:
>         chunk = fid.readlines(CHUNK_SIZE_HINT)
>         if not chunk: break
>         reader = csv.reader(chunk)
>         data = [ map(float, row) for row in reader ]
>         arrlist = [ numpy.array(data,dtype=float), arrlist ]
>         r += arrlist[0].shape[0]
>         del data
>         del reader
>         del chunk
>     print 'Created list of chunks, elapsed time so far: ', time.clock()
> - start
>     print 'Joining list...'
>     data = numpy.empty((r,arrlist[0].shape[1]),dtype=float)
>     r1 = r
>     while arrlist:
>         r0 = r1 - arrlist[0].shape[0]
>         data[r0:r1,:] = arrlist[0]
>         r1 = r0
>         del arrlist[0]
>         arrlist = arrlist[0]
>     print 'Elapsed time:', time.clock() - start
>
> make_data()
> read_test()
>
> This can process a CSV file of 6 million rows in about 150 seconds on
> my laptop. A CSV file of 1 million rows takes about 25 seconds.
>
> Just reading the 6 million row CSV file ( using fid.readlines() ) takes
> about 40 seconds on my laptop. Python lists are not particularly
> efficient. You can probably reduce the time to ~60 seconds by writing a
> new CSV reader for NumPy arrays in a C extension.



From fuzzyman at gmail.com  Sat Jan 20 20:46:30 2007
From: fuzzyman at gmail.com (Fuzzyman)
Date: 20 Jan 2007 17:46:30 -0800
Subject: Py 2.5 on Language Shootout
In-Reply-To: <mailman.2943.1169306650.32031.python-list@python.org>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>
	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>
	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>
	<1169275613.093797.67320@v45g2000cwv.googlegroups.com>
	<mailman.2943.1169306650.32031.python-list@python.org>
Message-ID: <1169343990.225580.227070@s34g2000cwa.googlegroups.com>


Carl Friedrich Bolz wrote:

> pgarrone at acay.com.au wrote:
>  >>> Looking over the benchmarks, one gains the impression that Python is a
>  >>> slow language.
>  >> What does that even mean - a slow language?
>  >>
>  >
>  > The alioth benchmarks provide a set of numbers by which
>  > languages may be compared.
>
> Wrong. The benchmarks provide a set of numbers by which
> _implementations_ of languages can be compared. After all, it is
> possible that someone implements a magic-pixie-dust-interpreter that
> executes Python programs several orders of magnitude fastes than
> CPython. Or you could say that C is slow because if you use CINT, a C
> interpreter ( http://root.cern.ch/root/Cint.html ) to execute it, it is
> slow.

If you rephrase your argument to read 'it is never useful to discuss
the comparative speed of langauges' then hopefully the error should be
obvious. But then to discuss the speed of languages rather than
implementations would be a generalisations, and generalisations are
always wrong... ;-)

Fuzzyman
http://www.voidspace.org.uk/python/articles.shtml

> 
> Cheers,
> 
> Carl Friedrich Bolz



From deets at nospam.web.de  Tue Jan  9 02:55:25 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 09 Jan 2007 08:55:25 +0100
Subject: Colons, indentation and reformatting. (2)
In-Reply-To: <1168327796.187713.107530@38g2000cwa.googlegroups.com>
References: <1168323368.592642.314130@i15g2000cwa.googlegroups.com>
	<45a33a24$0$7658$4c368faf@roadrunner.com>
	<1168327796.187713.107530@38g2000cwa.googlegroups.com>
Message-ID: <50h03hF1fgnbpU1@mid.uni-berlin.de>

> Won't the following rules work when pasting complete Python statements
> and complete lines, after other lines in an editor:
> 
> lets call the line after which the block is to be pasted the paste
> line, and the original indent of the first line of the copied block to
> be pasted the copy indent.
> 
> If the paste line ends in a colon then the copy indent must be greater
> than the paste line indent, or the copy block should be re-indented on
> pasting to make it so.
> If the paste line does not end in a colon then the copy block indent
> should be equal too or less than the paste line indent. If this is not
> the case then the user should be asked wether to re-indent the copy
> block to be equal to, or de-dented w.r.t. the paste line indent prior
> to pasting.


Could be done that way - but is it a killer feature? I doubt it, but 
maybe you convince somebody to implement it.

Yet it certainly doesn't justify a wikipedia edit - the FAQ entry is 
right, and there is no way of auto-indenting python code that for some 
reason suffered from indention mix-up.

Diez


From basti.wiesner at gmx.net  Wed Jan  3 09:45:37 2007
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Wed, 03 Jan 2007 15:45:37 +0100
Subject: function without brackets ?
References: <57668$459bbf95$d443bb3a$16218@news.speedlinq.nl>
Message-ID: <engfii$pvf$00$1@news.t-online.com>

Stef Mientki <S.Mientki-nospam at mailbox.kun.nl> typed

> If I call a parameterless function without brackets at the end,
> the function is not performed, but ...

If you omit the brackets, you don't actually call the function. Instead
you get a reference to the function object.

Consider this example:

cwd = os.getcwd()
# cwd now contains a string, denoting the current working directory
func = os.getcwd
# func now contains a reference to the function os.getcwd
print func == os.getcwd # prints True
# you can even call it:
cwd_2 = func()
# cwd_2 now also contains a string with the current directory.
print cwd == cwd_2 # prints True, too

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From jhefferon at smcvt.edu  Mon Jan 29 21:01:56 2007
From: jhefferon at smcvt.edu (Jim)
Date: 29 Jan 2007 18:01:56 -0800
Subject: error messages containing unicode
Message-ID: <1170122515.980168.150960@p10g2000cwp.googlegroups.com>

Hello,

I'm trying to write exception-handling code that is OK in the 
presence
of unicode error messages.  I seem to have gotten all mixed up and 
I'd
appreciate any un-mixing that anyone can give me.

I'm used to writing code like this.

  class myException(Exception):
      pass

  fn='README'
  try:
      f=open(fn,'r')
  except Exception, err:
      mesg='unable to open file'+fn+': '+str(err)
      raise myException, mesg

But what if fn is non-ascii?  The following code raises the
dreaded (to me) UnicodeEncodeError.

  class myException(Exception):
      pass

  def fcnCall():
      fn=u'a\N{LATIN SMALL LETTER O WITH DIAERESIS}k'
      try:
          # was: f=open(fn,'r')
          2/0  #  just substitute something that will raise an 
exception
      except Exception, err:
          mesg='unable to open file '+fn+': '+str(err)
          raise myException, mesg

  try:
      fcnCall()
  except Exception, err:
      print 'trouble calling fcnCall: '+str(err)

Maybe my trouble is the "str()", which is supposed to return a 
regular
string?  (BTW, unicode() makes no difference, and help(BaseException)
didn't give me any inspirations.)  So I looked for an end-around past 
the
str() call.

As I understand lib/module-exceptions.html, "For class
exceptions, [err] receives the exception instance. If the exception
class is derived from the standard root class BaseException, the
associated value is present as the exception instance's args
attribute.", I should be able to get the string out of err.args. Sure
enough, putting the above text into test.py and changing str(err)
to repr(err.args) yields this.

  $ python test.py
  trouble calling fcnCall: (u'unable to open file a\xf6k: integer 
division or modulo by zero',)

so that changing the above repr(err.args) to err.args[0] gives the
desired result.

  $ python test.py
  trouble calling fcnCall: unable to open file a?k: integer division 
or modulo by zero

(In case this doesn't show up as I intended on your screen, I see an
o with a diaeresis in the filename.)

But the documentation "This may be a string or a tuple containing 
several
items of information (e.g., an error code and a string explaining the
code)." gives me no reason to believe that all exceptions have the 
desired
unicode string as the 0-th element of the tuple.  I confess that I'm 
unable
to confidently read exceptions.c .

No doubt I've missed something (I googled around the net and on this 
group
but I didn't have any luck).  I'd be grateful if someone could show 
me
striaght.

Thanks,
Jim



From gagsl-py at yahoo.com.ar  Sun Jan 28 23:38:39 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 29 Jan 2007 01:38:39 -0300
Subject: Convert from unicode chars to HTML entities
References: <pan.2007.01.29.03.05.23.166735@REMOVEME.cybersource.com.au>
Message-ID: <op.tmwep1z8sd1mbx@gabriel2.softlabbsas.com.ar>

En Mon, 29 Jan 2007 00:05:24 -0300, Steven D'Aprano  
<steve at REMOVEME.cybersource.com.au> escribi?:

> I have a string containing Latin-1 characters:
>
> s = u"? and many more..."
>
> I want to convert it to HTML entities:
>
> result =>
> "&copy; and many more..."
>

Module htmlentitydefs contains the tables you're looking for, but you need  
a few transforms:

<code>
# -*- coding: iso-8859-15 -*-
 from htmlentitydefs import codepoint2name

unichr2entity = dict((unichr(code), u'&%s;' % name)
     for code,name in codepoint2name.iteritems()
     if code!=38) # exclude "&"

def htmlescape(text, d=unichr2entity):
     if u"&" in text:
         text = text.replace(u"&", u"&amp;")
     for key, value in d.iteritems():
         if key in text:
             text = text.replace(key, value)
     return text

print '%r' % htmlescape(u'hello')
print '%r' % htmlescape(u'"?? ??&? <??>')
</code>

Output:
u'hello'
u'&quot;&copy;&reg; &aacute;&eacute;&amp;&ouml; &lt;&sup2;&sup3;&gt;'

The result is an unicode object, with all known entities replaced. It does  
not handle missing, unknown entities - as the docs for htmlentitydefs say,  
"the definition provided here contains all the entities defined by XHTML  
1.0 that can be handled using simple textual substitution in the Latin-1  
character set (ISO-8859-1)."

-- 
Gabriel Genellina



From bdesth.quelquechose at free.quelquepart.fr  Sat Jan  6 17:27:10 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 06 Jan 2007 23:27:10 +0100
Subject: still struggling, howto use a list-element as a name ?
In-Reply-To: <Xns98B0968123CFErzantowgmailcom@208.49.80.253>
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
	<Xns98B0968123CFErzantowgmailcom@208.49.80.253>
Message-ID: <45a01c05$0$319$426a74cc@news.free.fr>

rzed a ?crit :
(snip)
>         for k in self.pin.keys():
>             self.__dict__[self.pin[k]['Name']] = self.pin[k]

for pin self.pin.values():
   self.__dict__[pin['name']] = pin



From mail at microcorp.co.za  Wed Jan 17 01:17:35 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 17 Jan 2007 08:17:35 +0200
Subject: Class data members in C
References: <eojhuu$72c$1@gemini.csx.cam.ac.uk>
Message-ID: <000201c73a17$b0125a00$03000080@hendrik>

"Nick Maclaren" <nmm1 at cus.cam.ac.uk> wrote:


> 
> Hmm.  The extensions documentation describes how to add instance
> members to a class (PyMemberDef), but I want to add a class member.
> Yes, this is constant for all instances of the class.
> 
> Any pointers?

When? - at time of defining base class, between class definition and
first instance, at time of creating instance, or after instance creation?

After instance creation is not easy, I think you would have to add 
to each instance... 

But then, I may be wrong - I often am.

- Hendrik



From jmike at alum.mit.edu  Tue Jan 16 09:17:48 2007
From: jmike at alum.mit.edu (jmike at alum.mit.edu)
Date: 16 Jan 2007 06:17:48 -0800
Subject: Command line arguments on Vista
In-Reply-To: <Xns98B69A42F81D3duncanbooth@127.0.0.1>
References: <1168613362.406648.304720@11g2000cwr.googlegroups.com>
	<Xns98B69A42F81D3duncanbooth@127.0.0.1>
Message-ID: <1168957067.605303.179260@51g2000cwl.googlegroups.com>

Thanks for the answers; that was the problem exactly.
  --JMike

Duncan Booth wrote:

> It sounds like the registry entry for running Python files is messed up.
> Can you go to a command line and see what the command 'ftype Python.File'
> displays? (Assuming that command lines and ftype still work on Vista)
>
> The output should be:
> Python.File="C:\Python25\python.exe" "%1" %*
>
> but if it only says:
> Python.File="C:\Python25\python.exe" "%1"
>
> then you would get the behaviour you observed (on any version of Windows,
> not just Vista).



From nil at dev.nul  Fri Jan 12 11:51:11 2007
From: nil at dev.nul (Christian Stapfer)
Date: Fri, 12 Jan 2007 17:51:11 +0100
Subject: 'LoadFile' not found when invoking Acrobat via wx.lib.pdfwin
Message-ID: <4b3c7$45a7bd44$54482de3$30930@news.hispeed.ch>

Hi,

 I get the following traceback when trying to have
wx.lib.pdfwin.PDFWindow open a PDF file:

E:\Tutoring\Teacher\Flashcards>python pdfwin1.py
Traceback (most recent call last):
  File "pdfwin1.py", line 50, in OnOpenButton
    self.pdf.LoadFile(dlg.GetPath())
  File 
"C:\Python24\lib\site-packages\wx-2.6-msw-unicode-enthought\wx\lib\pdfwin
.py", line 34, in LoadFile
    return self.CallAXMethod('LoadFile', fileName)
  File 
"C:\Python24\lib\site-packages\wx-2.6-msw-unicode-enthought\wx\activex.py
", line 385, in CallAXMethod
    return self._CallAXMethod(name, args)
  File 
"C:\Python24\lib\site-packages\wx-2.6-msw-unicode-enthought\wx\activex.py
", line 378, in _CallAXMethod
    return _activex.ActiveXWindow__CallAXMethod(*args)
KeyError: 'method <LoadFile> not found'

The code in pdfwin1.py is from
http://www.daniweb.com/code/snippet618.html

How could the ActiveX control PDFWindow possibly
*not* find the 'LoadFile' method, I wonder. - Or
am I misinterpreting the message?
(I am running Enthought Python 2.4 on Windows XP.)

Thank you in advance for any ideas as to what
the problem might be,

Christian



From ljz at asfast.com  Sat Jan  6 18:01:04 2007
From: ljz at asfast.com (Lloyd Zusman)
Date: Sat, 06 Jan 2007 18:01:04 -0500
Subject: Recommended way to force a thread context switch?
References: <GzOnh.112$a81.91@nntpserver.swip.net>
	<1168103258.602286.146100@42g2000cwt.googlegroups.com>
	<1168104008.910681.46800@38g2000cwa.googlegroups.com>
	<mailman.2373.1168116439.32031.python-list@python.org>
	<Xns98B0D9B8ABB0Bduncanbooth@127.0.0.1>
	<mailman.2374.1168120599.32031.python-list@python.org>
	<Xns98B0E573D7097duncanbooth@127.0.0.1>
Message-ID: <873b6nlpzj.fsf@asfast.com>

Duncan Booth <duncan.booth at invalid.invalid> writes:

> [ ... ]
>
> If the context isn't switching enough for you then try calling 
> sys.setcheckinterval(n) with varying values of n until you find one which 
> is suitable. Calling it with a lower value of n will increase the frequency 
> that you switch thread contexts, although of course it will also increase 
> the overall runtime for your program.

Thank you very much.  The sys.setcheckinterval function is what I need.
It seems that the original writer of the app had set this interval to a
high value in a part of the code that I overlooked until you mentioned
this right now.


> [ ... ]
>
> Why does it matter whether individual threads are being 'starved'? Surely 
> you want them all to complete in any case, so does it matter if they run 
> sequentially or in parallel?

Because some of the threads perform monitoring and notification that
need to occur in a timely fashion.  Since these threads are doing IO,
they switch context appropriately, but once one of the big
number-crunching threads gets control, it starves out the monitoring
threads, which is not a good thing for my app ... or at least it did
so with the original large checkinterval.


-- 
 Lloyd Zusman
 ljz at asfast.com
 God bless you.



From rajsdrster at gmail.com  Mon Jan  1 15:14:59 2007
From: rajsdrster at gmail.com (rajs)
Date: 1 Jan 2007 12:14:59 -0800
Subject: Online Books
Message-ID: <1167682499.685563.286510@h40g2000cwb.googlegroups.com>

http://languages-books.yourlib.com/index.html



From goodidea1950 at hotmail.spam.com  Sun Jan 28 22:35:09 2007
From: goodidea1950 at hotmail.spam.com (AKA gray asphalt)
Date: Sun, 28 Jan 2007 19:35:09 -0800
Subject: Do I need Python to run Blender correctly?
References: <tRZth.2027$pH3.140@newsfe12.phx>
	<5%4uh.75582$wP1.6882@newssvr14.news.prodigy.net>
	<joTuh.3445$4W5.1382@newsfe10.phx>
	<ssTuh.36083$QU1.26111@newssvr22.news.prodigy.net>
	<9TYuh.3468$4W5.752@newsfe10.phx>
	<B47vh.66904$qO4.21051@newssvr13.news.prodigy.net>
Message-ID: <qZdvh.3115$uj5.1505@newsfe07.phx>


I think you're right. I'll find a blender forum. Thanks for your help.
: -)

"John Nagle" <nagle at animats.com> wrote in message 
news:B47vh.66904$qO4.21051 at newssvr13.news.prodigy.net...
> AKA gray asphalt wrote:
>> "John Nagle" <nagle at animats.com> wrote in message 
>> news:ssTuh.36083$QU1.26111 at newssvr22.news.prodigy.net...
>
>> Is the manual you refer to the group project on blender.org or the $ 
>> manual like the one on Ebay?
>>
>    The "Blender 2.3 Guide" book. Also, if you're going to program the 
> thing,
> the "Blender GameKit" book is a big help.
>
>    Unless you have two screens, the online manual gets in your way.
>
>    This really should go in a Blender newsgroup or forum.
>
> John Nagle 




From dummy at dummy.nl  Thu Jan 18 10:16:35 2007
From: dummy at dummy.nl (Cecil Westerhof)
Date: Thu, 18 Jan 2007 16:16:35 +0100
Subject: Is it possible to fasten the import of cgi?
References: <45af6f47$0$322$e4fe514c@news.xs4all.nl>
	<mailman.2867.1169130619.32031.python-list@python.org>
Message-ID: <45af8f52$0$339$e4fe514c@news.xs4all.nl>

Gabriel Genellina wrote:

> "Cecil Westerhof" <dummy at dummy.nl> escribi? en el mensaje
> news:45af6f47$0$322$e4fe514c at news.xs4all.nl...
> 
>>I have a cgi-script dat uses the modules cgi, os, sys and time. Offcourse
>>I
>> can not time the time used to import time, but os and sys do not take
>> more as a millisecond. My script itself takes 3 or 4 milliseconds. But
>> importing
>> cgi takes 95 milliseconds. (This is on my test system a PII 300 MHz. Is
>> there a way to make this more fast? The import off cgi makes the script
>> at least 20 times as slow. Something like mod-python is not a
>> possibility. I could use it on my test machine, but not at the osting
>> provider.
> Surely os was imported earlier, and was already loaded. sys is a builtin
> module. But I think your problem is not how much time takes importing cgi,
> but how much time takes launching a new python process on each request.

Nope, it was certainly cgi. When I fetch time after importing and after the
script finishes, the difference is 4 milliseconds. If I import the modules
apart from cgi after I fetch the first time, there is added about 1
millisecond to the difference. When I also import cgi after taking the
time, the difference grows with 95 milliseconds. So for one reason ore
another, cgi is very expensive.



From hg at nospam.org  Fri Jan  5 05:15:28 2007
From: hg at nospam.org (hg)
Date: Fri, 05 Jan 2007 11:15:28 +0100
Subject: importing / loading a module / class dynamically
References: <o1vnh.281$rv1.88@newsfe21.lga>	<mailman.2329.1168015250.32031.python-list@python.org>
	<Qrvnh.22242$Dy2.4262@newsfe20.lga>
	<mailman.2333.1168016666.32031.python-list@python.org>
Message-ID: <IIvnh.21587$Du.16867@newsfe15.lga>

Laszlo Nagy wrote:

> 
>> Thanks,
>>
>> What I am doing is adding plugin support to PyCrust ... so I'm looking
>> for a mechanism where anyone can develop a plugin and have it loaded by
>> pycrust.
>>
>> the .py was a typo
>>
>>
>> why the "...Have at least an empty plugin/name1/__init__.py file..." ?
>>   
> When you do
> 
> import plugins.name1.name1
> 
> then "plugins" and "plugins/name1" should be a package, not a module. A
> package is a special directory that contains package initialization code
> in a __init__.py file. If you do not have the file, then the "plugins"
> directory will be only a directory, and it cannot be imported.
> 
> For details, see:
> 
> http://docs.python.org/tut/node8.html#SECTION008400000000000000000
> 
>   Laszlo


Many thanks Laszlo, it looks like I got it to work ... result will be on
www.snakecard.com/PY for those interested ... in the next few days

hg




From fsck_spam at telenet.be  Tue Jan 16 17:49:40 2007
From: fsck_spam at telenet.be (Rikishi 42)
Date: Tue, 16 Jan 2007 23:49:40 +0100
Subject: Making a simple script standalone
Message-ID: <5d1084-5j7.ln1@whisper.very.softly>


Hi,
I'm new to this group. I've tried finding my answer in existing messages,
but no such luck.

What I want to do is to compile/bundle/prepare/whatever_term a simple
Python script for deployment on a Windows machine. Installing Python
itself on that machine, is not an option. Ideally I would like to obtain
a single executable file, but a script+runtime is acceptable.

There is nothing graphical, nothing fancy about the script.
The only imports are: os, stat, string and time.


Any suggestions on an - easy and clear - path to follow ?


-- 
Research is what I'm doing, when I don't know what I'm doing.
(von Braun)



From bj_666 at gmx.net  Fri Jan  5 13:06:59 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 05 Jan 2007 19:06:59 +0100
Subject: Encoding / decoding strings
References: <1167999295.242042.79470@s34g2000cwa.googlegroups.com>
	<1168010144.000928.131920@42g2000cwt.googlegroups.com>
	<pan.2007.01.05.15.34.29.883744@gmx.net>
	<1168018757.397170.216870@11g2000cwr.googlegroups.com>
Message-ID: <pan.2007.01.05.18.06.58.776522@gmx.net>

In <1168018757.397170.216870 at 11g2000cwr.googlegroups.com>,
oliver at obeattie.com wrote:

> Basically, what I am trying to do is display all comments by a
> specified user on the website. As the only thing which has =always=
> been used to identify users which never changes is their e-mail
> addresses, this is the only thing which I can use. Obviously, I can't
> display this e-mail address though.

Associate a unique random number or string with each e-mail address and
use this outside the server to identify users.  An MD5 hash of the
mail address might be a good candidate for such a string but then it's
possible for attackers to verify if someone they know the address of, has
made specific comments.  So part of the anonymity is gone then.

Ciao,
	Marc 'BlackJack' Rintsch


From lrahuel.notgood at voila.fr  Mon Jan 15 05:18:28 2007
From: lrahuel.notgood at voila.fr (Laurent Rahuel)
Date: Mon, 15 Jan 2007 11:18:28 +0100
Subject: getting the name of hyperlinks in a file
References: <1168619296.006209.298990@s34g2000cwa.googlegroups.com>
Message-ID: <45ab54f5$0$5087$ba4acef3@news.orange.fr>

Hi,

I guess you should take a look at BeautifulSoup
(http://www.crummy.com/software/BeautifulSoup/).

And take a clooser look at the findAll method.
http://www.crummy.com/software/BeautifulSoup/documentation.html#The%20basic%20find%20method
%20findAll(name,%20attrs,%20recursive,%20text,%20limit,%20**kwargs)

Regards,

Laurent

CSUIDL PROGRAMMEr wrote:

> folks,
> I am trying to write a script that would open a download server and
> download all the files  and store them in a list
> 
> for example Download server is
> http://download.fedora.redhat.com/pub/fedora/linux/core/updates/5/SRPMS/
> 
> 
> is there any way this can be done in python??



From gert.cuykens at gmail.com  Sun Jan 21 21:31:05 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Mon, 22 Jan 2007 03:31:05 +0100
Subject: instancemethod
In-Reply-To: <ef60af090701211825r535e64e6va3580dbe24e15bd5@mail.gmail.com>
References: <ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a@mail.gmail.com>
	<ep110v$t04$1@sea.gmane.org>
	<ef60af090701211712u4d5a520q84c8e86c898bc649@mail.gmail.com>
	<ef60af090701211758s4e10back9203edefb97328e3@mail.gmail.com>
	<ef60af090701211825r535e64e6va3580dbe24e15bd5@mail.gmail.com>
Message-ID: <ef60af090701211831h5c61696cv4c67d19c05671403@mail.gmail.com>

never mind i think i need some sleep lol i did the exact opposite this
time .rowcount() -> .rowcount


From duncan.booth at invalid.invalid  Tue Jan 16 07:41:44 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 Jan 2007 12:41:44 GMT
Subject: Anyone has a nice "view_var" procedure ?
References: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
	<mailman.2751.1168904043.32031.python-list@python.org>
	<slrneqphem.1r4.horpner@FIAD06.norwich.edu>
Message-ID: <Xns98BA812216951duncanbooth@127.0.0.1>

Neil Cerutti <horpner at yahoo.com> wrote:

> dir( [object]) 
>   
>   [...] The list is not necessarily
>   complete. If the object is a module object, the list contains
>   the names of the module's attributes. If the object is a type
>   or class object, the list contains the names of its attributes,
>   and recursively of the attributes of its bases. Otherwise, the
>   list contains the object's attributes' names, the names of its
>   class's attributes, and recursively of the attributes of its
>   class's base classes. The resulting list is sorted
>   alphabetically. [...]
> 
> It's unclear to me what attributes an object could have that
> aren't included in the above list.

For a start the potentially infinite list of attributes handled by 
__getattr__ or __getattribute__:

>>> class C(object):
	def __getattribute__(self, name):
		if name.startswith('weird'):
			return 42

		
>>> c = C()
>>> c.weirdattribute
42
>>> dir(c)
[]

Any objects which are actually implemented as C extensions are quite likely 
to have attributes that dir() cannot see.


From nospam at riddergarn.dk  Tue Jan 30 14:07:50 2007
From: nospam at riddergarn.dk (Scripter47)
Date: Tue, 30 Jan 2007 20:07:50 +0100
Subject: SQL connecting
In-Reply-To: <InBvh.16133$pQ3.9693@newsread4.news.pas.earthlink.net>
References: <mailman.3275.1170098134.32031.python-list@python.org>	<L9svh.1239$zH1.840@newssvr29.news.prodigy.net>
	<InBvh.16133$pQ3.9693@newsread4.news.pas.earthlink.net>
Message-ID: <45BF9786.4010309@riddergarn.dk>

Dennis Lee Bieber skrev:
> On Mon, 29 Jan 2007 19:45:47 GMT, John Nagle <nagle at animats.com>
> declaimed the following in comp.lang.python:
> 
>> Scripter47 wrote:
>>> Hey
>>>
>>> It got a problem with python to connect to my SQL DBs, that's installed
>>> on my apache server. how do i connect to sql? Gettting data? Insert into 
>>> it?
>>     You need a third-party open source package called "MySQLdb".
>>
> 	Call me a nit, but did the original poster mean "MySQL" databases,
> or only that he uses SQL to access "my databases". The spelling is
> unclear as to what DBMS engine is actually being used. If it is /not/
> MySQL, then MySQLdb is futile.
Sry i didn't said it. it is a MySQL DB on a apache server



From oyekomova at hotmail.com  Wed Jan 10 14:48:06 2007
From: oyekomova at hotmail.com (oyekomova)
Date: 10 Jan 2007 11:48:06 -0800
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
Message-ID: <1168458486.538863.316130@k58g2000hse.googlegroups.com>

Thanks for your help. I compared the following code in NumPy with the
csvread in Matlab for a very large csv file. Matlab read the file in
577 seconds. On the other hand, this code below kept running for over 2
hours. Can this program be made more efficient? FYI - The csv file was
a simple 6 column file with a header row and more than a million
records.


import csv
from numpy import array
import time
t1=time.clock()
file_to_read = file('somename.csv','r')
read_from = csv.reader(file_to_read)
read_from.next()

datalist = [ map(float, row[:]) for row in read_from ]

# now the real data
data = array(datalist, dtype = float)

elapsed=time.clock()-t1
print elapsed












Robert Kern wrote:
> oyekomova wrote:
> > I would like to know how to convert a csv file with a header row into a
> > floating point array without the header row.
>
> Use the standard library module csv. Something like the following is a cheap and
> cheerful solution:
>
>
> import csv
> import numpy
>
> def float_array_from_csv(filename, skip_header=True):
>     f = open(filename)
>     try:
>         reader = csv.reader(f)
>         floats = []
>         if skip_header:
>             reader.next()
>         for row in reader:
>             floats.append(map(float, row))
>     finally:
>         f.close()
>
>     return numpy.array(floats)
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>  that is made terrible by our own mad attempt to interpret it as though it had
>  an underlying truth."
>   -- Umberto Eco



From bjourne at gmail.com  Tue Jan 16 11:28:13 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Tue, 16 Jan 2007 17:28:13 +0100
Subject: Conflicting needs for __init__ method
In-Reply-To: <874pqs7y7y.fsf@benfinney.id.au>
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<874pqs7y7y.fsf@benfinney.id.au>
Message-ID: <740c3aec0701160828k1cf64681t3d663a4310f0d339@mail.gmail.com>

On 1/15/07, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> The alternate constructors are decorated as '@classmethod' since they
> won't be called as instance methods, but rather:
>
>     foo = Rational.from_string("355/113")
>     bar = Rational.from_int(17)
>     baz = Rational.from_rational(foo)

I agree with you that that method is the right approach. But you can
also use module level functions, and sometimes that is even better:

def from_string(str):
    (n, d) = parse_elements_of_string_input(str)
    return Rational(n, d)

That way, you do not even have to expose the class at all to users of
the module. I think it depends on how you want users to use your
module. If you prefer:

import rational
rat = rational.from_string("123/456")

Then module level functions is best. But if you prefer:

from rational import Rational
rat = Rational.from_string("123/456")

class methods are better.

-- 
mvh Bj?rn


From kevin.bell at slcgov.com  Fri Jan 26 09:30:50 2007
From: kevin.bell at slcgov.com (Bell, Kevin)
Date: Fri, 26 Jan 2007 07:30:50 -0700
Subject: Win XP "Sleep" mode: can Py wake up?
Message-ID: <2387F0EED10A4545A840B231BBAAC722F117C8@slcimail1.slcgov.com>

Does anyone have any experience having python deal with sleep mode?  I'd
love to run something that would hear a sleep event coming and pickle
some data before sleep, then after coming out of sleep, unpickle...

Any thoughts?




From smusnmrNOSPAM at yahoo.com  Mon Jan 15 06:20:44 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Mon, 15 Jan 2007 12:20:44 +0100
Subject: python and MOV or MPEG
References: <eoffha$epe2$1@zam602.zam.kfa-juelich.de>
	<510uf3F1i9oo6U1@mid.uni-berlin.de>
Message-ID: <eofo2d$eqr9$1@zam602.zam.kfa-juelich.de>


Diez B. Roggisch wrote:

> siggi wrote:
>
>> Hi all,
>>
>> does Python support MPEG or MOV videoclips? I couldn't find anything
>> about it online.
>
> Weak in googling today? Must have been a rough weekend.
>
> There are several options, including pymedia and pygame.
>
> Diez

Thanks, Diez.  I forgot to mention that I am learning Python with python 2.5
on WinXP. And both pymedia and pygame require somewhat older versions of
python, 1.3 and 2.4, respectively. And the updated binaries are still in the
offing. I was naive enough to think MPEG could be done using modules already
existing.

siggi





From arkanes at gmail.com  Tue Jan 23 15:13:55 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 23 Jan 2007 14:13:55 -0600
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <1169582795.882496.209750@a75g2000cwd.googlegroups.com>
References: <45b6231b$1_2@news.bluewin.ch>
	<1169582795.882496.209750@a75g2000cwd.googlegroups.com>
Message-ID: <4866bea60701231213k1b2458f3uea41b0de42e4dce9@mail.gmail.com>

On 23 Jan 2007 12:06:35 -0800, imageguy <imageguy1206 at gmail.com> wrote:
> > I am trying to use UI Automation to drive an MS Windows app (with pywinauto).
> >
> > I need to scrape the app's window contents and use some form of OCR to get at
> > the texts (pywinauto can't get at them).
> >
> > As an alternative to integrating an OCR engine, and since I know the fonts and
> > sizes used to write on the app's windows, I reasoned that I could base a simple
> > text recognition module on the capability to drive MSWindows text rendering - eg
> > to generate pixmaps of texts I expect to find in the driven app's windows, exact
> > to the pixel.
> >
> > The advantage of that approach would be exactitude and self-containment.
> >
> > I've verified manually inside an Idle window, that indeed I could produce
> > pixmaps of expected app texts, exact to the pixel (with Tkinter+screen capture
> > at least).
> >
> > I could use help to turn this into a programmable capability, ie : A simple -
> > with Tkinter or otherwise - way to wrap access to the MS Windows UI text
> > rendering engine, as a function that would return a picture of rendered text,
> > given a string, a font, a size and colors ?
> >
> > And ideally, without interfering with screen contents ?
> >
> > Thanks in advance for any guidance,
> >
> > Boris Borcic
>
> I was looking for ( and still am searching for) similiar functionality.
>  Specifically I would like to be able to capture a small area of the
> screen (a number or a code) and convert this to text that can be used
> in my application.
>
> When I asked my question, I was directed to the Microsoft Accessibility
> tool kit.
> Serach on this list for the post titled;
> "Reading text labels from a Win32 window"
>
> I work with wxPython and Win32 applications exclusively.
>
> So if I can be of any help or assistance, please let me know.
>
> Geoff.
>

The OP stated that pywinauto couldn't get at the text, so it's
probably drawn directly with GDI methods rather than being a static
text control. The accessibility toolkit only works if it's a static
text control or the application goes to some lengths to expose the
text to screen readers.


From exarkun at divmod.com  Fri Jan 12 09:51:32 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 12 Jan 2007 09:51:32 -0500
Subject: context managers and generators
In-Reply-To: <1168611420.448058.163860@11g2000cwr.googlegroups.com>
Message-ID: <20070112145132.11447.624895917.divmod.quotient.14256@ohm>

On 12 Jan 2007 06:17:01 -0800, bob.sidebotham at gmail.com wrote:
>I'm happily using context managers and co-routines, and would like to
>use both at the same time, e.g.

Python has generators, not co-routines.

>
>    with foo():
>        ...
>        x = yield y
>        ...
>
>In this code multiple copies of this code can be executing at the
>"same" time, interleaved by the yield statement. This doesn't work
>well, since the context manager is dealing with global state
>(specifically, re-routing stdout).
>
>The problem is that all of my state (local variables, etc.) is nicely
>saved over the yield, but the context is not. So I end up having to
>write the code like this:
>
>    with foo():
>        ...
>    x = yield y
>    with foo():
>        ...
>
>which is not so pretty. What I'd like is some way to transparently save
>and restore context over a yield, but I don't see an easy way to do
>this.

Wrap the generator in a function which co-operates with your context
managers to clean-up or re-instate whatever they are interacting with
whenever execution leaves or re-enters the generator.

Jean-Paul


From gagsl-py at yahoo.com.ar  Sun Jan  7 15:44:36 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 12:44:36 -0800
Subject: Capturing stderr and stdout of a subprocess as a single stream
In-Reply-To: <1168202227.147827.294910@s80g2000cwa.googlegroups.com>
References: <1168198435.629380.136080@42g2000cwt.googlegroups.com>
	<1168201039.867515.35300@38g2000cwa.googlegroups.com>
	<1168202227.147827.294910@s80g2000cwa.googlegroups.com>
Message-ID: <1168202676.409477.50540@42g2000cwt.googlegroups.com>

On 7 ene, 17:37, "Fuzzyman" <fuzzy... at gmail.com> wrote:

> Two threads and a queue sounds horrible.

But unfortunately it's the only way if you don't control how the child
process behaves.
(It's not soooo ugly afterwards... certainly would be worse if you had
to syncronize both reading threads and the display thread using
semaphores by hand.)

-- 
Gabriel Genellina



From olsonas at gmail.com  Mon Jan 29 16:13:12 2007
From: olsonas at gmail.com (Drew)
Date: 29 Jan 2007 13:13:12 -0800
Subject: List Behavior when inserting new items
In-Reply-To: <45be5fa3$0$1529$426a34cc@news.free.fr>
References: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
	<45be5fa3$0$1529$426a34cc@news.free.fr>
Message-ID: <1170105192.167359.265520@s48g2000cws.googlegroups.com>


> > Is there any way to produce this kind of behavior easily?Hints:
>  >>> [None] * 5
> [None, None, None, None, None]
>  >>> [1, 2, 3, None] + [10]
> [1, 2, 3, None, 10]
>
> HTH

That is exactly what I was looking for. I'm actually working on some 
problems at http://codgolf.com. I find it helps me to learn a language 
and I'm coming from ruby where arrays have subtle differences from 
python's lists. Thanks for all the helpful responses.



From shejo284 at gmail.com  Fri Jan  5 03:49:07 2007
From: shejo284 at gmail.com (Sheldon)
Date: 5 Jan 2007 00:49:07 -0800
Subject: PyType_IsSubtype ()
Message-ID: <1167986947.735415.99970@s34g2000cwa.googlegroups.com>

Hi,

Can anyone tell me what this error mean:
#0  0x4008376e in PyType_IsSubtype () from /usr/lib/libpython2.3.so.1.0

The core file backtrace can be found below.
I am using Numeric and Python2.3 on a Linux OS.

Any help is appreciated!
*********************************
Core was generated by `/usr/bin/python msgppscomp.py'.
Program terminated with signal 11, Segmentation fault.
warning: current_sos: Can't read pathname for load map: Input/output
error

Symbols already loaded for /usr/lib/libpython2.3.so.1.0
Symbols already loaded for /lib/tls/libpthread.so.0
Symbols already loaded for /lib/libdl.so.2
Symbols already loaded for /lib/libutil.so.1
Symbols already loaded for /usr/lib/libstdc++.so.5
Symbols already loaded for /lib/tls/libm.so.6
Symbols already loaded for /lib/libgcc_s.so.1
Symbols already loaded for /lib/tls/libc.so.6
Symbols already loaded for /lib/ld-linux.so.2
Symbols already loaded for
/usr/lib/python2.3/site-packages/Numeric/multiarray.so
Symbols already loaded for
/usr/lib/python2.3/site-packages/Numeric/_numpy.so
Symbols already loaded for
/usr/lib/python2.3/site-packages/Numeric/umath.so
Symbols already loaded for /usr/lib/python2.3/lib-dynload/strop.so
Symbols already loaded for /usr/lib/python2.3/lib-dynload/math.so
Symbols already loaded for /usr/lib/python2.3/lib-dynload/struct.so
Symbols already loaded for /usr/lib/python2.3/lib-dynload/binascii.so
Symbols already loaded for /usr/lib/python2.3/lib-dynload/cStringIO.so
Symbols already loaded for
/usr/lib/python2.3/site-packages/Numeric/ranlib.so
Symbols already loaded for
/usr/lib/python2.3/site-packages/Numeric/lapack_lite.so
Symbols already loaded for /usr/lib/python2.3/lib-dynload/time.so
Symbols already loaded for
/data/proj_ns1/safworks/sheldon/MSG_PPS_COMP/c_codes/msgppsarea.so
Symbols already loaded for /usr/lib/libhdf5.so.0
Symbols already loaded for /lib/libz.so.1
Symbols already loaded for /usr/lib/python2.3/lib-dynload/cPickle.so
Symbols already loaded for /usr/lib/python2.3/lib-dynload/_bsddb.so
Symbols already loaded for /usr/lib/libdb-4.1.so
Symbols already loaded for /usr/lib/python2.3/lib-dynload/gdbm.so
Symbols already loaded for /usr/lib/libgdbm.so.2
Symbols already loaded for /usr/lib/python2.3/lib-dynload/dbm.so
#0  0x4008376e in PyType_IsSubtype () from /usr/lib/libpython2.3.so.1.0
**********************************************************************************

/Sheldon



From wccppp at gmail.com  Thu Jan  4 01:18:29 2007
From: wccppp at gmail.com (wcc)
Date: 3 Jan 2007 22:18:29 -0800
Subject: where to ask questions related to comtypes?
Message-ID: <1167891509.842292.125420@i80g2000cwc.googlegroups.com>

Hello group,

Is there a separate mailing list for comtypes? Or this is the
appropriate place to post questions related to this package(from Thomas
Heller)? 

Thanks,

--
wcc



From dubrovsky at physics.uq.edu.au  Tue Jan 16 23:10:31 2007
From: dubrovsky at physics.uq.edu.au (Alejandro Dubrovsky)
Date: Wed, 17 Jan 2007 14:10:31 +1000
Subject: How can I write code using FP
References: <1169003899.592015.300290@s34g2000cwa.googlegroups.com>
Message-ID: <eok7jn$ina$1@bunyip2.cc.uq.edu.au>

kernel1983 wrote:

> In Function Program?Language can use like this:
> 
> define a function:
> f = lambda x,y:x,y
> 
> then we use f to define another function:
> f2 = f(1)
> the f2 should equal to:
> f2=lambda y:1,y
> 
> we should be able call f2 with one parameter:f2(2)
> just return 1,2
> 
> but how can I implement the characteristic in Python??I think it could
> do like this but HOW-TO?

If you are using python 2.5, then you can use functools.partial, otherwise
lookup one of the many curry implementations, like the ones found in
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52549

One found in the comments of that page by Scott David Daniels:

def curry(*args, **kwargs):
    function, args = args[0], args[1:]
    def result(*rest, **kwrest):
        combined = kwargs.copy()
        combined.update(kwrest)
        return function(*args + rest, **combined)
    return result


so, in your case:

f = lambda x,y: (x,y)
f2 = functools.partial(f,1)
>>> f2(3)
1,3



From nmm1 at cus.cam.ac.uk  Sun Jan 14 08:21:39 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 14 Jan 2007 13:21:39 GMT
Subject: Fixed-point [was Re: Rational Numbers]
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com><mailman.2597.1168550439.32031.python-list@python.org><eo6ia5$5bt$1@gemini.csx.cam.ac.uk><mailman.2643.1168611301.32031.python-list@python.org><eo883j$l9d$1@gemini.csx.cam.ac.uk><mailman.2648.1168616202.32031.python-list@python.org><eo8b1r$r9c$1@gemini.csx.cam.ac.uk><mailman.2664.1168630485.32031.python-list@python.org>
	<eo8oa0$o4o$1@gemini.csx.cam.ac.uk>
	<mailman.2705.1168750931.32031.python-list@python.org>
Message-ID: <eodap3$1b6$1@gemini.csx.cam.ac.uk>


In article <mailman.2705.1168750931.32031.python-list at python.org>,
"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
|> 
|> Ok I will throw in a skewed ball at this point - use integer arithmetic,
|> and work in tenths of cents or pennies or whatever, and don't be too 
|> lazy to do your own print formatting...

If anyone is interested in doing this, here are a few notes on some of
the non-trivial aspects.  Please feel free if you want to contact me
for more information.

All numbers are held as (precision, value).  Precision is the number of
digits after the decimal point (a small, often constant, integer) and
the value is held as an integer.

It would be possible to have a separate subclass or context for every
precision (like Decimal), but that would be an unnecessary complication.

+, - and % return a precision that is the maximum of their input
precisions, and // returns a precision of 0.

* returns a precision that is the sum of its input precisions.

/ returns a floating-point number!

There is a divide function that takes a divisor, dividend and output
precision.  It also takes a rounding rule as an optional argument
(up, down, in, out, conventional nearest or IEEE 754R nearest).

There is a precision conversion function that takes a value and
output precision, and a rounding rule as an optional argument.

There is a conversion function that takes a string or floating-point
number and output precision, and a rounding rule as an optional
argument.  It raises an exception if a 1 ULP change in the floating-
point number would give a different answer; this is needed to make
certain operations reliable.

The default formatting does the obvious thing :-)

Er, that's about it ....


Regards,
Nick Maclaren.


From bignose+hates-spam at benfinney.id.au  Sat Jan 20 02:13:46 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 20 Jan 2007 18:13:46 +1100
Subject: OT Annoying Habits
References: <mailman.2916.1169240529.32031.python-list@python.org>
	<pan.2007.01.20.02.22.52.492763@REMOVE.THIS.cybersource.com.au>
	<01bc01c73c5f$75e8cfe0$03000080@hendrik>
Message-ID: <87zm8e2ms5.fsf@benfinney.id.au>

"Hendrik van Rooyen" <mail at microcorp.co.za> writes:

> "Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> wrote:
>
> > .snoitnevnoc
> > hsilgnE tpada )ylbissop revenehw( dluohs ew os dna ,naitraM ton ,puorgswen
> > egaugnal hsilgnE na no er'ew ,segaugnal hcus era ereht fi neve tuB
>
> First I thought it was Welsh or Cornish or something.
>
> Then it was like being in my first year of school again-
> reading letter by letter.  Never realised how difficult it is.
>
> I suppose it will improve with practice.

Alternatively, you could consider it to be an active impediment to
understanding, which, no matter how convenient it may be for the
person writing it, is against the norms of written English and
inconsiderate of the reader.

With that in mind, you might convince those who write their messages
that way to conform to the norms of written English for the sake of
communication.

-- 
 \     "No wonder I'm all confused; one of my parents was a woman, the |
  `\                          other was a man."  -- Ashleigh Brilliant |
_o__)                                                                  |
Ben Finney



From scottballard at hotmail.com  Tue Jan 23 16:08:57 2007
From: scottballard at hotmail.com (Scott Ballard)
Date: Tue, 23 Jan 2007 13:08:57 -0800
Subject: newbie question: ftp.storbinary()
Message-ID: <BAY119-F308650E60A44C911FD66C7C4AD0@phx.gbl>

Sorry for the lame question, I'm still trying to pick up Python and new to 
the list here.

Question:
I'm trying to write a python script that will access an FTP site and upload 
some files. I've gotten everything working except for the actual uploading 
of the files.

I'm assuming that  I should use storbinary( command, file[, blocksize]) to 
transfer the files. the documentation says "command should be an appropriate 
"STOR" command: "STOR filename"."

I can't seem to figure out an `appropriate "STOR" command' is???

Thank for reading my post.

Cheers,
Scott




From martin at v.loewis.de  Wed Jan  3 14:08:58 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 03 Jan 2007 20:08:58 +0100
Subject: type classobj not defined?
In-Reply-To: <mailman.2246.1167843463.32031.python-list@python.org>
References: <mailman.2246.1167843463.32031.python-list@python.org>
Message-ID: <459BFF4A.6020002@v.loewis.de>

Wesley Brooks schrieb:
>> type(b) == classobj
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> NameError: name 'classobj' is not defined
> 
> For the time being I'll use b.__name__ == b to ensure I'm getting the
> right class. Is there a reason why the other types such as bool are
> defined but classobj isn't?

In general, only those types which you also use as constructors are
builtin. I.e. you would write bool(foo) (where foo is a variable),
but you would not write classobj("bar") (to create a class named
"bar"). That you can also use it for a type test is a side-effect.

Some more types are available in the types module. In this case,
you can use types. In this case, types.ClassType would do the trick.

Regards,
Martin


From icius at comcast.net  Sun Jan 21 16:55:04 2007
From: icius at comcast.net (icius)
Date: 21 Jan 2007 13:55:04 -0800
Subject: SOAPpy and ArrayOfString
In-Reply-To: <1169367091.902030.197480@m58g2000cwm.googlegroups.com>
References: <1169367091.902030.197480@m58g2000cwm.googlegroups.com>
Message-ID: <1169416504.095288.189960@51g2000cwl.googlegroups.com>

Figured it out.  This works:


#!/usr/bin/python

import SOAPpy

wsdlFile =
'http://localhost:8080/axis/services/USD_R11_WebService?WSDL'

server = SOAPpy.WSDL.Proxy(wsdlFile)

server.soapproxy.config.dumpSOAPOut = 1
server.soapproxy.config.dumpSOAPIn = 1

SID = server.login('srvcdesk', 'xxxxxxxxx')

attr = SOAPpy.structType()
attr._addItem('string', 'userid')
attr._addItem('string', 'last_name')
attr._addItem('string', 'first_name')

contacts = server.doSelect(SID, 'cnt', "userid = 'srvcdesk'", 1, attr)

print contacts

server.logout(SID)


The XML generated is very similar, but my web service seems to like
this for some reason...weird.



icius wrote:
> Hello all,
>
> I am trying to use a web services API with Python and SOAPpy as a
> client.  Some of the method paramters in this web service's WSDL are
> asking for an "ArrayOfString" type. Here is my code so far:
>
> #!/usr/bin/python
>
> from SOAPpy import WSDL
>
> wsdlFile =
> 'http://localhost:8080/axis/services/USD_R11_WebService?WSDL'
>
> server = WSDL.Proxy(wsdlFile)
>
> server.soapproxy.config.dumpSOAPOut = 1
> server.soapproxy.config.dumpSOAPIn = 1
>
> SID = server.login('srvcdesk', 'xxxxxxxx')
>
> contacts = server.doSelect(SID, 'cnt', "userid = 'abeju01'", 1,
> ['last_name', 'first_name', 'userid'])
>
>
> I tried using a simple Python list for the argument that wants
> "ArrayOfString".  Python generates the following XML for the last
> argument of the "doSelect" command above:
>
> <v5 SOAP-ENC:arrayType="xsd:string[3]" xsi:type="SOAP-ENC:Array">
> <item>last_name</item>
> <item>first_name</item>
> <item>userid</item>
> </v5>
>
>
> The web service does not like this at all and returns the following
> error:
>
> SOAPpy.Types.faultType: <Fault soapenv:Server.userException:
> org.xml.sax.SAXException: Bad types (class [Ljava.lang.Object; -> class
> usdjws65.ArrayOfString): >
>
>
> I know in Perl I had to do some special gyrations to pass the right
> structue for ArrayOfString to this same web service.  Is there any way
> to force a type in Python or any other ideas on how to do this?



From zhzhao at cisco.com  Tue Jan  2 12:02:17 2007
From: zhzhao at cisco.com (Jenny Zhao (zhzhao))
Date: Tue, 2 Jan 2007 09:02:17 -0800
Subject: Looking for python SIP/MGCP stacks
Message-ID: <1ECA23B17E8AB54C859FA0449B729F0E03428702@xmb-sjc-235.amer.cisco.com>

Thanks Anthony.

I am wondering where I can get Divmod Sine and Shtoom. Are they open
source ?

Thanks again
Jenny 

-----Original Message-----
From: Anthony Baxter [mailto:anthonybaxter at gmail.com] 
Sent: Saturday, December 30, 2006 2:38 AM
To: Jenny Zhao (zhzhao)
Cc: python-list at python.org
Subject: Re: Looking for python SIP/MGCP stacks

> I am using python to write a testing tools, currently this tool only 
> supports skinny protocol. I am planning to add SIP and MGCP support as

> well, wondering if you have written these protocol stacks before which

> can be leveraged from.

There's two I know of - shtoom and Divmod Sine. The latter is a more
complete implementation of SIP and probably what you want to use.


From tiedon_jano at hotmail.com  Thu Jan  4 04:14:40 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Thu, 04 Jan 2007 09:14:40 GMT
Subject: question on creating class
In-Reply-To: <1167895677.041759.230190@42g2000cwt.googlegroups.com>
References: <1167895677.041759.230190@42g2000cwt.googlegroups.com>
Message-ID: <4A3nh.56$0c7.26@read3.inet.fi>

wcc kirjoitti:
> Hello,
> 
> How do I create a class using a variable as the class name?
> 
> For example, in the code below, I'd like replace the line
> 
> class TestClass(object):
> with something like
> class eval(className) (object):
> 
> Is it possible?  Thanks for your help.
> 
> className = "TestClass"
> 
> class TestClass(object):
>     def __init__(self):
>         print "Creating object of TestClass..."
> 
>     def method1(self):
>         print "This is a method."
> 
> if __name__ == "__main__":
>     o = TestClass()
>     o.method1()
> 
> --
> wcc
> 

I'm curious: what is the original problem that you are trying to solve?

The following works, but note that I'm no Python expert and if any of 
the regular wizards around here says that doing these kind of things is 
sick, I'm gonna agree 100%  ;)

className = "TestClass2"

class TestClass(object):
     def __init__(self):
         print "Creating object of TestClass..."

     def method1(self):
         print "This is a method."

exec('class ' + className +
     '''(object):
     def __init__(self):
         print "Creating object of TestClass2..."

     def method1(self):
         print "This is a method1 of TestClass2."
''')

if __name__ == "__main__":
     o = TestClass()
     o.method1()
     o2 = TestClass2()
     o2.method1()
     o2 = locals()[className]()
     o2.method1()


From paddy3118 at netscape.net  Sat Jan 20 17:11:10 2007
From: paddy3118 at netscape.net (Paddy)
Date: 20 Jan 2007 14:11:10 -0800
Subject: Does eval has the same features as Perl's?
In-Reply-To: <mailman.2937.1169285428.32031.python-list@python.org>
References: <mailman.2937.1169285428.32031.python-list@python.org>
Message-ID: <1169331070.665344.261280@a75g2000cwd.googlegroups.com>


Jm lists wrote:

> Hello members,
>
> I want to know does the "eval" in python have the same features as in
> Perl (capture errors)?
>
> For example,in perl I can wrote:
>
> $re = eval { 1 / 0 };
>
> Though 1/0 is a fatal error but since it's in "eval" block so the perl
> interpreter doesn't get exit.
>
> Thanks again.
Hi Jim,
If your new to Python and coming from Perl then your question above
needs knowledge of Python Exceptions, and the try statement.

if you had variables x and y and wanted to compute x/y but if y was
zero print some message and continue, then you would most likely do
something like:

x = 1
y = 0
try:
  z = x / y
except ZeroDivisionError:
  print "This leads to a divide by zero error!"


There is more info in the tutorial chapter 8.

- Paddy.



From bdesth.quelquechose at free.quelquepart.fr  Wed Jan 24 16:12:58 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 24 Jan 2007 22:12:58 +0100
Subject: Re-thinking my if-thens - a software engineering question
In-Reply-To: <1169668287.517657.24450@l53g2000cwa.googlegroups.com>
References: <1169668287.517657.24450@l53g2000cwa.googlegroups.com>
Message-ID: <45b7c521$0$25888$426a74cc@news.free.fr>

metaperl a ?crit :
> Ok, I have a module called textgen.py. The point of this module is to
> generate a csv file from an array of dictionaries.

Err... You know there's a csv module in the stdlib, don't you ?

> As I iterate through
> each dictionary, I "massage" the dictionary values before writing them
> out to csv. Now, for one dictionary entry, I have the following code:
> 
>             if dict_key == 'PCN':
> 		fields = dict_val.split("/")
>                 mo = re.match( '(\w{2})(\d{2})(\d{2})' , fields[1] )
> 		if mo:
> 		    dict_val = "%s/%s%s/%s" % (fields[0], mo.group(1), mo.group(3),
> fields[2][1:])
> 		else:
> 		    dict_val = dict_val

FWIW, you could as well skip this else clause

> Ok, so now here is what has happened. This code was based on the
> assumption that dict_val would have 2 forward slashes in it. It turns
> out that I need to follow a different process of massaging when no
> slashes are present. A naive solution would be something like:
> 
> if dict_key == 'PCN':
>     fields = dict_val.split("/")
>     if fields == 3:
       if len(fields) == 3:
>         dict_val = pcn_three(fields) # where pcn_three
> is the code above
>      else:
>          # new logic
> 
> But I am wondering if I should abstract the flow of control into a
> class or something.

Depends... If your code is starting to smell, then yes, it's probably 
time to refactor a bit. Note that you don't necessarily needs OO to 
clean up a mess. Python functions are objects on their own, so you can 
use them like any other variable. A common idiom is to use a dict as a 
dispatch table:

def test1(arg):
   print "test1", arg

def test2(arg):
   print "test2", arg

def test3(arg):
   print "test3", arg

dispatch = {
   'TEST_ONE': test1,
   'TEST_TWO': test2,
   'TEST_THREE': test3,
}
default = lambda arg: arg

#...

func = dispatch(dict_key)
dict_val = func(fields)

And using lambdas you can even come close to Perl !-)

dispatch = {
   'PCN' : lambda arg: \
           (new_logic, pcn_three)[arg.count('/') == 2](arg.split('/')),
   'XXX' : code_here,
   ...
}

Or you could write some "dispatcher helper" functions, like:

def dispatch_on_arg_count(default, *funcs):
   def _dispatcher(*args):
     try:
       func = funcs[len(args)]
     except IndexError:
       func =default
     return func(*args)
   return _dispatcher

dispatch = {
   'PCN': dispatch_on_arg_count(
            default,
            default,
            pcn_one,
            pcn_two,
            pcn_three
          ),
    'XXX' : code_here,
}


Or you could check Philip Eby's dispatch package...

And of course, since Python classes are themselves callables (no 'new' 
operator, you just call the class to instanciate it), and instances can 
be callable too (just define a __call__(self, ...) method), you can 
throw OO in the mix too  !-)

Now weither it will make your code more readable is another question...

> Ideas welcome.
> 

HTH


From mhellwig at xs4all.nl  Thu Jan 18 05:09:49 2007
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Thu, 18 Jan 2007 11:09:49 +0100
Subject: Would a Dutch speaker please check this wiki page please?
In-Reply-To: <a9dd0$45aea341$d443bb3a$10472@news.speedlinq.nl>
References: <mailman.2852.1169070591.32031.python-list@python.org>
	<a9dd0$45aea341$d443bb3a$10472@news.speedlinq.nl>
Message-ID: <45af4735$0$322$e4fe514c@news.xs4all.nl>

Stef Mientki wrote:
> skip at pobox.com wrote:
>> Got a note about a new page on the Python Wiki:
>>
>>>>>>> "Wade" == Wade McDaniel <wmcdaniel at wolfgangsvault.com> writes:
>>
>>     http://wiki.python.org/moin/Selcuk_Altun
>>
>> I suspect it's junk since it doesn't seem to mention Python and the 
>> website
>> it mentions doesn't seem to exist.  Still, just in case...
> The only (incorrect) Dutch sentence on the whole site is:
>   "Welkom op me site www.keriwar.nl",
> which should have been
>   "Welkom op mijn site www.keriwar.nl"
> but that could be explained, while his name "Selcuk Altun" is not 
> orginated from the Netherlands.
> I just expect that he is trying to setup a wiki,
> but that's too soon to give it a judgement.
> 
> cheers,
> Stef Mientki
>>
>> Thx,
>>
>> Skip

Could be Afrikaans too, but the page is gone now so I can't check.

-- 
mph


From gagsl-py at yahoo.com.ar  Thu Jan 25 19:31:30 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 25 Jan 2007 21:31:30 -0300
Subject: MIME text attachment question
In-Reply-To: <epa50o$se6$1@sea.gmane.org>
References: <epa50o$se6$1@sea.gmane.org>
Message-ID: <7.0.1.0.0.20070125212716.04421838@yahoo.com.ar>

At Thursday 25/1/2007 08:41, Neal Becker wrote:

>I want to send a file (plain text) as an attachment.
>
>I'm using MIMEText.  This attaches text OK, but I would like to have a
>filename attached to it, so that the recipient could save it without having
>to specify a filename.

part = MIMEText("Hello world!")
part.add_header('Content-Disposition', 'attachment', filename='x.txt')




-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From gagsl-py at yahoo.com.ar  Tue Jan  2 13:20:41 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 02 Jan 2007 15:20:41 -0300
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167757137.942280.32270@42g2000cwt.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
	<mailman.2205.1167751490.32031.python-list@python.org>
	<1167757137.942280.32270@42g2000cwt.googlegroups.com>
Message-ID: <7.0.1.0.0.20070102151720.05bfe578@yahoo.com.ar>

At Tuesday 2/1/2007 13:58, Ben Sizer wrote:

> > Notice that there is NO need to alter the system path. You just have
> > to tell Windows where python.exe resides; there is a per-application
> > path located at
> > HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths.
>
> >From what I can tell, that is solely for file associations. If so, it
>will work if you type "setup.py install" but not if you type "python
>setup.py install". For instance, I have an entry for Firefox in that
>part of the registry, but if you try executing "firefox" at the command
>line, it fails.

Typing "start firefox" at the command line should work.
It appears that cmd.exe does *not* use ShellExecute to find the 
executable, so this approach doesn't work as expected :(


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From klappnase at web.de  Mon Jan 15 13:02:35 2007
From: klappnase at web.de (klappnase)
Date: 15 Jan 2007 10:02:35 -0800
Subject: Segfault with tktreectrl on python-2.5 on linux
Message-ID: <1168884154.116074.308720@s34g2000cwa.googlegroups.com>

Hello,

I use the tktreectrl Tk extension (http://tktreectrl.sourceforge.net)
through the python wrapper module
(http://klappnase.zexxo.net/TkinterTreectrl/index.html).
With python-2.5 it seems that each time some text is inserted into the
treectrl widget a segfault occurs (on linux, on windows2000 it seemed
to work).
Some people sent me mail describing the same problem, so I think it is
not a problem with my installation of python-2.5. The treectrl widget
itself works well when running from Tcl or from python2.4, so i suspect
that it is a bug in python-2.5.
Below the output from gdb when running the dirtree demo from the
TkinterTreectrl package:

(gdb) run
Starting program: /usr/local/bin/python2.5
/home/pingu/projekte/TkinterTreectrl/TkinterTreectrl-0.6/demo/dirtree.py
[Thread debugging using libthread_db enabled]
[New Thread -1209842944 (LWP 21831)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1209842944 (LWP 21831)]
block_alloc (b=0x1, size=16) at Python/pyarena.c:109
109             if (b->ab_offset + size > b->ab_size) {
(gdb) bt
#0  block_alloc (b=0x1, size=16) at Python/pyarena.c:109
#1  0x080d829e in PyArena_Malloc (arena=0x82b2790, size=16) at
Python/pyarena.c:192
#2  0x081129ca in Ellipsis (arena=0x10) at Python/Python-ast.c:1764
#3  0xb77731ef in DisplayProcText () from
/usr/lib/treectrl2.2/libtreectrl2.2.so

Any ideas?

Regards

Michael



From rweth at cisco.com  Sat Jan  6 14:49:17 2007
From: rweth at cisco.com (rweth)
Date: Sat, 06 Jan 2007 11:49:17 -0800
Subject: search mail by date with imaplib
In-Reply-To: <1168112128.062140.308400@v33g2000cwv.googlegroups.com>
References: <1168112128.062140.308400@v33g2000cwv.googlegroups.com>
Message-ID: <1168112957.946721@sj-nntpcache-1.cisco.com>

csselo at gmail.com wrote:
> Hi
> I am looking for a code sample which searches mail by date with imaplib
> 
> example:
> get email from 01.01.2007 to now
> 
> how can I change imaplib search parameters?
> 
So I had to do the same thing a few years back. I love python but
seriously every author spends less than 1/10 of 1% on doc !

Well So do I .. so take it with a grain of salt. Here is what I did,
MANY YEARS AGO .. I don't even have a IMAP account anymore

t,data = M.uid("SEARCH",None,'(FROM blahblah)')
luid = string.split(data[0])
for uid in luid:
   t,d = M.uid("FETCH",uid,"(BODY[HEADER.FIELDS (DATE SUBJECT TO)])")
   date = d[0][1]

This will get you the dates .. and you can write your own
filter off that .. it's trivial. What isn't so great is
getting every piece of mail and then searching for the needle's in
the haystack.

So I guess this is plan c (just in case you don't get a better answer).
I will watch this one for a "plan a | b" answer.




From S.Mientki-nospam at mailbox.kun.nl  Sat Jan  6 05:20:54 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sat, 06 Jan 2007 11:20:54 +0100
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <NKWdnbpb-bcqjwLYnZ2dnUVZ_t-mnZ2d@comcast.com>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
	<NKWdnbpb-bcqjwLYnZ2dnUVZ_t-mnZ2d@comcast.com>
Message-ID: <4b389$459f77f1$d443bb3a$7521@news.speedlinq.nl>


Steven Bethard wrote:
> Stef Mientki wrote:
>> Not sure I wrote the subject line correct,
>> but the examples might explain if not clear
> [snip]
>> class pin2:
>>   def __init__ (self, naam):
>>     self.Name  = naam
>>
>> aap2 = pin2('aap2')     # seems completely redundant to me.
>> print aap2.Name
> 
> You can use class statements to create your instances with some 
> metaclass trickery. Unlike normal assignments, class statements get 
> access to the name being assigned. So you could write your class like::

thank you all guys,
this gives me a lot to study,
for the moment I'm satisfied with the fact that it "is possible".

cheers,
Stef Mientki


From justinjohnson at gmail.com  Wed Jan 10 13:15:01 2007
From: justinjohnson at gmail.com (Justin Johnson)
Date: 10 Jan 2007 10:15:01 -0800
Subject: Building Python 2.5.0 on AIX 5.3 - Undefined symbol: .__floor
In-Reply-To: <1168442952.063392.225160@p59g2000hsd.googlegroups.com>
References: <1168442952.063392.225160@p59g2000hsd.googlegroups.com>
Message-ID: <1168452900.904960.114980@77g2000hsv.googlegroups.com>

It looks like I just need to upgrade my compiler version.  See
http://www-128.ibm.com/developerworks/forums/dw_thread.jsp?message=13876484&cat=72&thread=124105&treeDisplayType=threadmode1&forum=905#13876484
for more information.

Justin Johnson wrote:
> Hello,
>
> I'm trying to build Python 2.5.0 on AIX 5.3 using IBM's compiler
> (VisualAge C++ Professional / C for AIX Compiler, Version 6).  I run
> configure and make, but makes fails with undefined symbols.  See the
> output from configure and make below.
>
> svnadm /svn/build/python-2.5.0>env CC=cc CXX=xlC ./configure
> --prefix=$base_dir \
> >     --disable-ipv6 \
> >     --enable-shared=yes \
> >     --enable-static=no
> checking MACHDEP... aix5
> checking EXTRAPLATDIR...
> checking for --without-gcc...
> checking for gcc... cc_r
> checking for C compiler default output file name... a.out
> checking whether the C compiler works... yes
> checking whether we are cross compiling... no
> checking for suffix of executables...
> checking for suffix of object files... o
> checking whether we are using the GNU C compiler... no
> checking whether cc_r accepts -g... yes
> checking for cc_r option to accept ANSI C... none needed
> checking for --with-cxx-main=<compiler>... no
> checking how to run the C preprocessor... cc_r -E
> checking for egrep... grep -E
> checking for AIX... yes
> checking for --with-suffix...
> checking for case-insensitive build directory... no
> checking LIBRARY... libpython$(VERSION).a
> checking LINKCC... $(srcdir)/Modules/makexp_aix Modules/python.exp .
> $(LIBRARY); $(PURIFY) $(MAINCC)
> checking for --enable-shared... yes
> checking for --enable-profiling...
> checking LDLIBRARY... libpython$(VERSION).a
> checking for ranlib... ranlib
> checking for ar... ar
> checking for svnversion... found
> checking for a BSD-compatible install... ./install-sh -c
> checking for --with-pydebug... no
> checking whether cc_r accepts -OPT:Olimit=0... no
> checking whether cc_r accepts -Olimit 1500... no
> checking whether pthreads are available without options... yes
> checking whether xlC also accepts flags for thread support... no
> checking for ANSI C header files... yes
> checking for sys/types.h... yes
> checking for sys/stat.h... yes
> checking for stdlib.h... yes
> checking for string.h... yes
> checking for memory.h... yes
> checking for strings.h... yes
> checking for inttypes.h... yes
> checking for stdint.h... yes
> checking for unistd.h... yes
> checking asm/types.h usability... no
> checking asm/types.h presence... no
> checking for asm/types.h... no
> checking conio.h usability... no
> checking conio.h presence... no
> checking for conio.h... no
> checking curses.h usability... yes
> checking curses.h presence... yes
> checking for curses.h... yes
> checking direct.h usability... no
> checking direct.h presence... no
> checking for direct.h... no
> checking dlfcn.h usability... yes
> checking dlfcn.h presence... yes
> checking for dlfcn.h... yes
> checking errno.h usability... yes
> checking errno.h presence... yes
> checking for errno.h... yes
> checking fcntl.h usability... yes
> checking fcntl.h presence... yes
> checking for fcntl.h... yes
> checking grp.h usability... yes
> checking grp.h presence... yes
> checking for grp.h... yes
> checking shadow.h usability... no
> checking shadow.h presence... no
> checking for shadow.h... no
> checking io.h usability... no
> checking io.h presence... no
> checking for io.h... no
> checking langinfo.h usability... yes
> checking langinfo.h presence... yes
> checking for langinfo.h... yes
> checking libintl.h usability... no
> checking libintl.h presence... no
> checking for libintl.h... no
> checking ncurses.h usability... no
> checking ncurses.h presence... no
> checking for ncurses.h... no
> checking poll.h usability... yes
> checking poll.h presence... yes
> checking for poll.h... yes
> checking process.h usability... no
> checking process.h presence... no
> checking for process.h... no
> checking pthread.h usability... yes
> checking pthread.h presence... yes
> checking for pthread.h... yes
> checking signal.h usability... yes
> checking signal.h presence... yes
> checking for signal.h... yes
> checking stropts.h usability... yes
> checking stropts.h presence... yes
> checking for stropts.h... yes
> checking termios.h usability... yes
> checking termios.h presence... yes
> checking for termios.h... yes
> checking thread.h usability... yes
> checking thread.h presence... yes
> checking for thread.h... yes
> checking for unistd.h... (cached) yes
> checking utime.h usability... yes
> checking utime.h presence... yes
> checking for utime.h... yes
> checking sys/audioio.h usability... no
> checking sys/audioio.h presence... no
> checking for sys/audioio.h... no
> checking sys/bsdtty.h usability... no
> checking sys/bsdtty.h presence... no
> checking for sys/bsdtty.h... no
> checking sys/file.h usability... yes
> checking sys/file.h presence... yes
> checking for sys/file.h... yes
> checking sys/loadavg.h usability... no
> checking sys/loadavg.h presence... no
> checking for sys/loadavg.h... no
> checking sys/lock.h usability... yes
> checking sys/lock.h presence... yes
> checking for sys/lock.h... yes
> checking sys/mkdev.h usability... no
> checking sys/mkdev.h presence... no
> checking for sys/mkdev.h... no
> checking sys/modem.h usability... no
> checking sys/modem.h presence... no
> checking for sys/modem.h... no
> checking sys/param.h usability... yes
> checking sys/param.h presence... yes
> checking for sys/param.h... yes
> checking sys/poll.h usability... yes
> checking sys/poll.h presence... yes
> checking for sys/poll.h... yes
> checking sys/select.h usability... yes
> checking sys/select.h presence... yes
> checking for sys/select.h... yes
> checking sys/socket.h usability... yes
> checking sys/socket.h presence... yes
> checking for sys/socket.h... yes
> checking sys/statvfs.h usability... yes
> checking sys/statvfs.h presence... yes
> checking for sys/statvfs.h... yes
> checking for sys/stat.h... (cached) yes
> checking sys/time.h usability... yes
> checking sys/time.h presence... yes
> checking for sys/time.h... yes
> checking sys/times.h usability... yes
> checking sys/times.h presence... yes
> checking for sys/times.h... yes
> checking for sys/types.h... (cached) yes
> checking sys/un.h usability... yes
> checking sys/un.h presence... yes
> checking for sys/un.h... yes
> checking sys/utsname.h usability... yes
> checking sys/utsname.h presence... yes
> checking for sys/utsname.h... yes
> checking sys/wait.h usability... yes
> checking sys/wait.h presence... yes
> checking for sys/wait.h... yes
> checking pty.h usability... no
> checking pty.h presence... no
> checking for pty.h... no
> checking libutil.h usability... no
> checking libutil.h presence... no
> checking for libutil.h... no
> checking sys/resource.h usability... yes
> checking sys/resource.h presence... yes
> checking for sys/resource.h... yes
> checking netpacket/packet.h usability... no
> checking netpacket/packet.h presence... no
> checking for netpacket/packet.h... no
> checking sysexits.h usability... yes
> checking sysexits.h presence... yes
> checking for sysexits.h... yes
> checking bluetooth.h usability... no
> checking bluetooth.h presence... no
> checking for bluetooth.h... no
> checking bluetooth/bluetooth.h usability... no
> checking bluetooth/bluetooth.h presence... no
> checking for bluetooth/bluetooth.h... no
> checking for dirent.h that defines DIR... yes
> checking for library containing opendir... none required
> checking whether sys/types.h defines makedev... no
> checking for sys/mkdev.h... (cached) no
> checking sys/sysmacros.h usability... yes
> checking sys/sysmacros.h presence... yes
> checking for sys/sysmacros.h... yes
> checking for term.h... yes
> checking for linux/netlink.h... no
> checking for clock_t in time.h... yes
> checking for makedev... no
> checking Solaris LFS bug... no
> checking for mode_t... yes
> checking for off_t... yes
> checking for pid_t... yes
> checking return type of signal handlers... void
> checking for size_t... yes
> checking for uid_t in sys/types.h... yes
> checking for ssize_t... yes
> checking for int... yes
> checking size of int... 4
> checking for long... yes
> checking size of long... 4
> checking for void *... yes
> checking size of void *... 4
> checking for short... yes
> checking size of short... 2
> checking for float... yes
> checking size of float... 4
> checking for double... yes
> checking size of double... 8
> checking for fpos_t... yes
> checking size of fpos_t... 4
> checking for size_t... (cached) yes
> checking size of size_t... 4
> checking for long long support... yes
> checking for long long... yes
> checking size of long long... 8
> checking for uintptr_t support... no
> checking size of off_t... 4
> checking whether to enable large file support... no
> checking size of time_t... 4
> checking for pthread_t... yes
> checking size of pthread_t... 4
> checking for --enable-toolbox-glue... no
> checking for --enable-framework... no
> checking for dyld... no
> checking SO... .so
> checking LDSHARED... $(BINLIBDEST)/config/ld_so_aix $(CC)
> -bI:$(BINLIBDEST)/config/python.exp
> checking CCSHARED...
> checking LINKFORSHARED... -Wl,-bE:Modules/python.exp -lld
> checking CFLAGSFORSHARED...
> checking SHLIBS... $(LIBS)
> checking for dlopen in -ldl... yes
> checking for shl_load in -ldld... no
> checking for library containing sem_init... none required
> checking for textdomain in -lintl... yes
> checking for genuine AIX C++ extensions support... no
> checking for t_open in -lnsl... no
> checking for socket in -lsocket... no
> checking for --with-libs... no
> checking for --with-system-ffi... no
> checking for --with-signal-module... yes
> checking for --with-dec-threads... no
> checking for --with-threads... yes
> checking if PTHREAD_SCOPE_SYSTEM is supported... yes
> checking for pthread_sigmask... yes
> checking if --enable-ipv6 is specified... no
> checking for --with-doc-strings... yes
> checking for --with-tsc... no
> checking for --with-pymalloc... yes
> checking for --with-wctype-functions... no
> checking for dlopen... yes
> checking DYNLOADFILE... dynload_shlib.o
> checking MACHDEP_OBJS... MACHDEP_OBJS
> checking for alarm... yes
> checking for bind_textdomain_codeset... no
> checking for chown... yes
> checking for clock... yes
> checking for confstr... yes
> checking for ctermid... yes
> checking for execv... yes
> checking for fork... yes
> checking for fpathconf... yes
> checking for ftime... yes
> checking for ftruncate... yes
> checking for gai_strerror... yes
> checking for getgroups... yes
> checking for getlogin... yes
> checking for getloadavg... no
> checking for getpeername... yes
> checking for getpgid... yes
> checking for getpid... yes
> checking for getpriority... yes
> checking for getpwent... yes
> checking for getspnam... no
> checking for getspent... no
> checking for getsid... yes
> checking for getwd... yes
> checking for kill... yes
> checking for killpg... yes
> checking for lchown... yes
> checking for lstat... yes
> checking for mkfifo... yes
> checking for mknod... yes
> checking for mktime... yes
> checking for mremap... no
> checking for nice... yes
> checking for pathconf... yes
> checking for pause... yes
> checking for plock... yes
> checking for poll... yes
> checking for pthread_init... yes
> checking for putenv... yes
> checking for readlink... yes
> checking for realpath... yes
> checking for select... yes
> checking for setegid... yes
> checking for seteuid... yes
> checking for setgid... yes
> checking for setlocale... yes
> checking for setregid... yes
> checking for setreuid... yes
> checking for setsid... yes
> checking for setpgid... yes
> checking for setpgrp... yes
> checking for setuid... yes
> checking for setvbuf... yes
> checking for snprintf... yes
> checking for sigaction... yes
> checking for siginterrupt... yes
> checking for sigrelse... yes
> checking for strftime... yes
> checking for sysconf... yes
> checking for tcgetpgrp... yes
> checking for tcsetpgrp... yes
> checking for tempnam... yes
> checking for timegm... no
> checking for times... yes
> checking for tmpfile... yes
> checking for tmpnam... yes
> checking for tmpnam_r... no
> checking for truncate... yes
> checking for uname... yes
> checking for unsetenv... yes
> checking for utimes... yes
> checking for waitpid... yes
> checking for wait3... yes
> checking for wait4... yes
> checking for wcscoll... yes
> checking for _getpty... no
> checking for chroot... yes
> checking for link... yes
> checking for symlink... yes
> checking for fchdir... yes
> checking for fsync... yes
> checking for fdatasync... yes
> checking for ctermid_r... no
> checking for flock... no
> checking for getpagesize... yes
> checking for true... true
> checking for inet_aton in -lc... yes
> checking for inflateCopy in -lz... yes
> checking for hstrerror... no
> checking for inet_aton... yes
> checking for inet_pton... yes
> checking for setgroups... yes
> checking for openpty... no
> checking for openpty in -lutil... no
> checking for openpty in -lbsd... no
> checking for forkpty... no
> checking for forkpty in -lutil... no
> checking for forkpty in -lbsd... no
> checking for fseek64... no
> checking for fseeko... yes
> checking for fstatvfs... yes
> checking for ftell64... no
> checking for ftello... yes
> checking for statvfs... yes
> checking for dup2... yes
> checking for getcwd... yes
> checking for strdup... yes
> checking for strerror... yes
> checking for memmove... yes
> checking for getpgrp... yes
> checking for setpgrp... (cached) yes
> checking for gettimeofday... yes
> checking for major... yes
> checking for getaddrinfo... yes
> checking getaddrinfo bug... buggy
> checking for getnameinfo... yes
> checking whether time.h and sys/time.h may both be included... yes
> checking whether struct tm is in sys/time.h or time.h... time.h
> checking for struct tm.tm_zone... no
> checking for tzname... yes
> checking for struct stat.st_rdev... yes
> checking for struct stat.st_blksize... yes
> checking for struct stat.st_flags... no
> checking for struct stat.st_gen... yes
> checking for struct stat.st_birthtime... no
> checking for struct stat.st_blocks... yes
> checking for time.h that defines altzone... no
> checking whether sys/select.h and sys/time.h may both be included...
> yes
> checking for addrinfo... yes
> checking for sockaddr_storage... yes
> checking whether char is unsigned... yes
> checking for an ANSI C-conforming const... yes
> checking for working volatile... yes
> checking for working signed char... yes
> checking for prototypes... yes
> checking for variable length prototypes and stdarg.h... yes
> checking for socketpair... yes
> checking if sockaddr has sa_len member... yes
> checking whether va_list is an array... no
> checking for gethostbyname_r... yes
> checking gethostbyname_r with 6 args... no
> checking gethostbyname_r with 5 args... no
> checking gethostbyname_r with 3 args... yes
> checking for __fpu_control... no
> checking for __fpu_control in -lieee... no
> checking for --with-fpectl... no
> checking for --with-libm=STRING... default LIBM="-lm"
> checking for --with-libc=STRING... default LIBC=""
> checking for hypot... yes
> checking wchar.h usability... yes
> checking wchar.h presence... yes
> checking for wchar.h... yes
> checking for wchar_t... yes
> checking size of wchar_t... 2
> checking for UCS-4 tcl... no
> checking whether wchar_t is signed... no
> checking what type to use for unicode... wchar_t
> checking whether byte ordering is bigendian... yes
> checking whether right shift extends the sign bit... yes
> checking for getc_unlocked() and friends... yes
> checking for readline in -lreadline... yes
> checking for rl_callback_handler_install in -lreadline... yes
> checking for rl_pre_input_hook in -lreadline... no
> checking for rl_completion_matches in -lreadline... yes
> checking for broken nice()... no
> checking for broken poll()... no
> checking for struct tm.tm_zone... (cached) no
> checking for tzname... (cached) yes
> checking for working tzset()... yes
> checking for tv_nsec in struct stat... no
> checking for tv_nsec2 in struct stat... no
> checking whether mvwdelch is an expression... yes
> checking whether WINDOW has _flags... yes
> checking for is_term_resized... no
> checking for resize_term... no
> checking for resizeterm... no
> checking for /dev/ptmx... no
> checking for /dev/ptc... yes
> checking for %zd printf() format support... yes
> checking for socklen_t... yes
> checking for build directories... done
> configure: creating ./config.status
> config.status: creating Makefile.pre
> config.status: creating Modules/Setup.config
> config.status: creating pyconfig.h
> config.status: pyconfig.h is unchanged
> creating Modules/Setup
> creating Modules/Setup.local
> creating Makefile
> svnadm /svn/build/python-2.5.0>make
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Modules/python.o ./Modules/python.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Modules/_typesmodule.o Modules/_typesmodule.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/acceler.o Parser/acceler.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/grammar1.o Parser/grammar1.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/listnode.o Parser/listnode.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/node.o Parser/node.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/parser.o Parser/parser.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/parsetok.o Parser/parsetok.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/bitset.o Parser/bitset.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/metagrammar.o Parser/metagrammar.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/firstsets.o Parser/firstsets.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/grammar.o Parser/grammar.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/pgen.o Parser/pgen.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/myreadline.o Parser/myreadline.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/tokenizer.o Parser/tokenizer.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/abstract.o Objects/abstract.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/boolobject.o Objects/boolobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/bufferobject.o Objects/bufferobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/cellobject.o Objects/cellobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/classobject.o Objects/classobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/cobject.o Objects/cobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/codeobject.o Objects/codeobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/complexobject.o Objects/complexobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/descrobject.o Objects/descrobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/enumobject.o Objects/enumobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/exceptions.o Objects/exceptions.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/genobject.o Objects/genobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/fileobject.o Objects/fileobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/floatobject.o Objects/floatobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/frameobject.o Objects/frameobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/funcobject.o Objects/funcobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/intobject.o Objects/intobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/iterobject.o Objects/iterobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/listobject.o Objects/listobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/longobject.o Objects/longobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/dictobject.o Objects/dictobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/methodobject.o Objects/methodobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/moduleobject.o Objects/moduleobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/object.o Objects/object.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/obmalloc.o Objects/obmalloc.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/rangeobject.o Objects/rangeobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/setobject.o Objects/setobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/sliceobject.o Objects/sliceobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/stringobject.o Objects/stringobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/structseq.o Objects/structseq.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/tupleobject.o Objects/tupleobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/typeobject.o Objects/typeobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/weakrefobject.o Objects/weakrefobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/unicodeobject.o Objects/unicodeobject.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Objects/unicodectype.o Objects/unicodectype.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/Python-ast.o Python/Python-ast.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/asdl.o Python/asdl.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o Python/ast.o
> Python/ast.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/bltinmodule.o Python/bltinmodule.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/ceval.o Python/ceval.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/mysnprintf.o Python/mysnprintf.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/tokenizer_pgen.o Parser/tokenizer_pgen.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/printgrammar.o Parser/printgrammar.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Parser/pgenmain.o Parser/pgenmain.c
> cc_r -DNDEBUG -O   Parser/acceler.o Parser/grammar1.o Parser/listnode.o
> Parser/node.o Parser/parser.o Parser/parsetok.o Parser/bitset.o
> Parser/metagrammar.o Parser/firstsets.o Parser/grammar.o Parser/pgen.o
> Objects/obmalloc.o Python/mysnprintf.o Parser/tokenizer_pgen.o
> Parser/printgrammar.o Parser/pgenmain.o -ldl  -o Parser/pgen
> Parser/pgen ./Grammar/Grammar ./Include/graminit.h ./Python/graminit.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/compile.o Python/compile.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/codecs.o Python/codecs.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/errors.o Python/errors.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/frozen.o Python/frozen.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/frozenmain.o Python/frozenmain.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/future.o Python/future.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/getargs.o Python/getargs.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/getcompiler.o Python/getcompiler.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/getcopyright.o Python/getcopyright.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/getmtime.o Python/getmtime.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE
> -DPLATFORM='"aix5"' -o Python/getplatform.o ./Python/getplatform.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/getversion.o Python/getversion.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/graminit.o Python/graminit.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/import.o Python/import.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -I. -o
> Python/importdl.o ./Python/importdl.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/marshal.o Python/marshal.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/modsupport.o Python/modsupport.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/mystrtoul.o Python/mystrtoul.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/pyarena.o Python/pyarena.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/pyfpe.o Python/pyfpe.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/pystate.o Python/pystate.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/pythonrun.o Python/pythonrun.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/structmember.o Python/structmember.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/symtable.o Python/symtable.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/sysmodule.o Python/sysmodule.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/traceback.o Python/traceback.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/getopt.o Python/getopt.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/pystrtod.o Python/pystrtod.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/dynload_shlib.o Python/dynload_shlib.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Python/thread.o Python/thread.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Modules/config.o Modules/config.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE
> -DPYTHONPATH='":plat-aix5:lib-tk"' \
>         -DPREFIX='"/svn"' \
>         -DEXEC_PREFIX='"/svn"' \
>         -DVERSION='"2.5"' \
>         -DVPATH='""' \
>         -o Modules/getpath.o ./Modules/getpath.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Modules/main.o Modules/main.c
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE -o
> Modules/gcmodule.o Modules/gcmodule.c
> cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
> ./Modules/threadmodule.c -o Modules/threadmodule.o
> cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
> ./Modules/signalmodule.c -o Modules/signalmodule.o
> cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
> ./Modules/posixmodule.c -o Modules/posixmodule.o
> cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
> ./Modules/errnomodule.c -o Modules/errnomodule.o
> cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
> ./Modules/pwdmodule.c -o Modules/pwdmodule.o
> cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
> ./Modules/_sre.c -o Modules/_sre.o
> cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
> ./Modules/_codecsmodule.c -o Modules/_codecsmodule.o
> cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
> ./Modules/zipimport.c -o Modules/zipimport.o
> cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
> ./Modules/symtablemodule.c -o Modules/symtablemodule.o
> cc_r  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE  -c
> ./Modules/xxsubtype.c -o Modules/xxsubtype.o
> cc_r -c  -DNDEBUG -O  -I. -I./Include   -DPy_BUILD_CORE
> -DSVNVERSION=\"`LANG=C svnversion .`\" -o Modules/getbuildinfo.o
> ./Modules/getbuildinfo.c
> rm -f libpython2.5.a
> ar cr libpython2.5.a Modules/getbuildinfo.o
> ar cr libpython2.5.a Modules/_typesmodule.o
> ar cr libpython2.5.a Parser/acceler.o Parser/grammar1.o
> Parser/listnode.o Parser/node.o Parser/parser.o Parser/parsetok.o
> Parser/bitset.o Parser/metagrammar.o Parser/firstsets.o
> Parser/grammar.o Parser/pgen.o Parser/myreadline.o Parser/tokenizer.o
> ar cr libpython2.5.a Objects/abstract.o Objects/boolobject.o
> Objects/bufferobject.o Objects/cellobject.o Objects/classobject.o
> Objects/cobject.o Objects/codeobject.o Objects/complexobject.o
> Objects/descrobject.o Objects/enumobject.o Objects/exceptions.o
> Objects/genobject.o Objects/fileobject.o Objects/floatobject.o
> Objects/frameobject.o Objects/funcobject.o Objects/intobject.o
> Objects/iterobject.o Objects/listobject.o Objects/longobject.o
> Objects/dictobject.o Objects/methodobject.o Objects/moduleobject.o
> Objects/object.o Objects/obmalloc.o Objects/rangeobject.o
> Objects/setobject.o Objects/sliceobject.o Objects/stringobject.o
> Objects/structseq.o Objects/tupleobject.o Objects/typeobject.o
> Objects/weakrefobject.o Objects/unicodeobject.o Objects/unicodectype.o
> ar cr libpython2.5.a Python/Python-ast.o Python/asdl.o Python/ast.o
> Python/bltinmodule.o Python/ceval.o Python/compile.o Python/codecs.o
> Python/errors.o Python/frozen.o Python/frozenmain.o Python/future.o
> Python/getargs.o Python/getcompiler.o Python/getcopyright.o
> Python/getmtime.o Python/getplatform.o Python/getversion.o
> Python/graminit.o Python/import.o Python/importdl.o Python/marshal.o
> Python/modsupport.o Python/mystrtoul.o Python/mysnprintf.o
> Python/pyarena.o Python/pyfpe.o Python/pystate.o Python/pythonrun.o
> Python/structmember.o Python/symtable.o Python/sysmodule.o
> Python/traceback.o Python/getopt.o Python/pystrtod.o
> Python/dynload_shlib.o  Python/thread.o
> ar cr libpython2.5.a Modules/config.o Modules/getpath.o Modules/main.o
> Modules/gcmodule.o
> ar cr libpython2.5.a Modules/threadmodule.o  Modules/signalmodule.o
> Modules/posixmodule.o  Modules/errnomodule.o  Modules/pwdmodule.o
> Modules/_sre.o  Modules/_codecsmodule.o  Modules/zipimport.o
> Modules/symtablemodule.o  Modules/xxsubtype.o
> ranlib libpython2.5.a
> ./Modules/makexp_aix Modules/python.exp . libpython2.5.a;  cc_r
> -Wl,-bE:Modules/python.exp -lld -o python \
>                 Modules/python.o \
>                 libpython2.5.a -ldl    -lm
> ld: 0711-317 ERROR: Undefined symbol: .__floor
> ld: 0711-317 ERROR: Undefined symbol: .__ceil
> ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more
> information.
> make: *** [python] Error 8
> svnadm /svn/build/python-2.5.0>
>
> I ran the last line again adding the -bloadmap option.  The results of
> this are below.
>
> (ld): halt 4
> (ld): setfflag 4
> (ld): savename python
> (ld): filelist 9 2
> (ld): i /lib/crt0.o
> (ld): lib /usr/lib/libld.a
> (ld): i Modules/python.o
> (ld): i libpython2.5.a
> (ld): lib /usr/lib/libdl.a
> (ld): lib /usr/lib/libm.a
> (ld): lib /usr/lib/libxlopt.a
> (ld): lib /usr/lib/libpthreads.a
> (ld): lib /usr/lib/threads/libc.a
> LIBRARY: Shared object libdl.a[shr.o]: 4 symbols imported.
> LIBRARY: Shared object libpthreads.a[shr_comm.o]: 173 symbols imported.
> LIBRARY: Shared object libpthreads.a[shr_xpg5.o]: 152 symbols imported.
> LIBRARY: Shared object libc.a[shr.o]: 2800 symbols imported.
> LIBRARY: Shared object libc.a[meth.o]: 2 symbols imported.
> LIBRARY: Shared object libc.a[posix_aio.o]: 20 symbols imported.
> LIBRARY: Shared object libc.a[aio.o]: 14 symbols imported.
> LIBRARY: Shared object libc.a[pse.o]: 5 symbols imported.
> LIBRARY: Shared object libc.a[dl.o]: 4 symbols imported.
> LIBRARY: Shared object libc.a[pty.o]: 1 symbols imported.
> FILELIST: Number of previously inserted files processed: 9
> (ld): exports Modules/python.exp
> EXPORTS: Symbols exported: 1034
> (ld): resolve
> RESOLVE: 5597 of 15450 symbols were kept.
> (ld): addgl /usr/lib/glink.o
> ADDGL: Glink code added for 178 symbols.
> (ld): er full
> ld: 0711-318 ERROR: Undefined symbols were found.
>         The following symbols are in error:
>  Symbol                    Inpndx  TY CL Source-File(Object-File) OR
> Import-File{Shared-object}
>                               RLD: Address  Section  Rld-type
> Referencing Symbol
>
> ----------------------------------------------------------------------------------------------
>  .__floor                  [392]   ER PR
> Objects/floatobject.c(libpython2.5.a[floatobject.o])
>                                    00000b80 .text    R_RBR    [38]
> <.float_pow>
>                                    00000c28 .text    R_RBR    [38]
> <.float_pow>
>                                    00000ff4 .text    R_RBR    [42]
> <.float_divmod>
>  .__floor                  [404]   ER PR
> Objects/complexobject.c(libpython2.5.a[complexobject.o])
>                                    0000179c .text    R_RBR    [42]
> <.complex_divmod>
>                                    00001a2c .text    R_RBR    [44]
> <.complex_remainder>
>  .__floor                  [552]   ER PR
> Python/bltinmodule.c(libpython2.5.a[bltinmodule.o])
>                                    00000bec .text    R_RBR    [24]
> <.builtin_round>
>  .__ceil                   [554]   ER PR
> Python/bltinmodule.c(libpython2.5.a[bltinmodule.o])
>                                    00000c2c .text    R_RBR    [24]
> <.builtin_round>
> ER: The return code is 8.
>
> I noticed the following in /usr/include/math.h, but am not sure how
> this relates.
>
> #ifdef __IBMC__
> #if (__xlC__ >= 0x0600) /* VAC version 6 and above */
> #define floor(__x)        __floor(__x)
> #define ceil(__x)         __ceil(__x)
> #endif /* __xlC__ >= 0x0600 */
> #endif /* __IBMC__ */
>
> Does anyone know what I am doing wrong here.  Any help is appreciated.
> 
> Justin



From gatis.tomsons at gmail.com  Tue Jan 16 06:54:28 2007
From: gatis.tomsons at gmail.com (Gacha)
Date: 16 Jan 2007 03:54:28 -0800
Subject: pyExcelerator big integer values
In-Reply-To: <1168432294.206654.308670@77g2000hsv.googlegroups.com>
References: <1168349446.381187.65810@11g2000cwr.googlegroups.com>
	<45a42e7c@news.eftel.com>
	<1168422401.594651.278390@i39g2000hsf.googlegroups.com>
	<1168432294.206654.308670@77g2000hsv.googlegroups.com>
Message-ID: <1168948466.943438.273040@v45g2000cwv.googlegroups.com>

John Machin wrote:
> Here's a possible replacement -- I say possible because you have been
> rather coy about what you are actually trying to do.
>
> value = values[(row_idx, col_idx)])
> if isinstance(value, float):
>     v = repr(value)
> else:
>     v = unicode(value)
>
> HTH
> John

My final result:

value = values[(row_idx, col_idx)]
if isinstance(value, float) and
re.match('^\d+\.\d+e\+\d+$',unicode(value)):
    v = repr(value)
else:
    v = unicode(value)



From smusnmrNOSPAM at yahoo.com  Mon Jan 22 03:28:16 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Mon, 22 Jan 2007 09:28:16 +0100
Subject: Win GUI application: avoiding DOS console
References: <eotkr7$ffdf$1@zam602.zam.kfa-juelich.de>
	<eotrll$475$1@atlantis.news.tpi.pl>
Message-ID: <ep1sj2$5g8h$1@zam602.zam.kfa-juelich.de>


"Jarek Zgoda"  wrote:

> Siggi napisa?(a):
>
>> how do I avoid the DOS console show-up when starting a WinXP GUI 
>> application
>> with mouseclick on the respective Python file?
>>
>> I had this with my previous Python installation; it is very simple,
>> something with a "-i" somewhere in the open command of the  MS Windows 
>> data
>> types "PY" and "PYW". But after a new Python installation, this was lost,
>> and I cannot find the instruction what to do.
>
> Run it using pythonw.exe instead of python.exe (check in file types
> properties window).
>
> -- 
> Jarek Zgoda
> http://jpa.berlios.de/

Thanks!

siggi 




From exarkun at divmod.com  Tue Jan 30 12:52:34 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 30 Jan 2007 12:52:34 -0500
Subject: Help me understand this
In-Reply-To: <op.tmy9z2d9sd1mbx@gabriel2.softlabbsas.com.ar>
Message-ID: <20070130175234.25807.1326599968.divmod.quotient.3655@ohm>

On Tue, 30 Jan 2007 14:39:28 -0300, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
>En Tue, 30 Jan 2007 06:34:01 -0300, Beej <beej at beej.us> escribi?:
>
>> But here's one I still don't get:
>>
>>>>> type(2)
>> <type 'int'>
>>>>> type((2))
>> <type 'int'>
>>>>> (2).__add__(1)
>> 3
>>>>> 2.__add__(1)
>>   File "<stdin>", line 1
>>     2.__add__(1)
>>             ^
>> SyntaxError: invalid syntax
>
>It appears to be a bug, either in the grammar implementation, or in the
>grammar documentation.
>These are the relevant rules:
>
>attributeref ::= primary "." identifier
>
>primary ::= atom | attributeref | subscription | slicing | call
>
>atom ::= identifier | literal | enclosure
>
>literal ::= stringliteral | integer | longinteger | floatnumber |
>imagnumber
>
>An integer is a primary so 2.__add(1) should be valid.

A float is, too.  2.__add is a float followed by an identifier.
Not legal.  As pointed out elsewhere in the thread, (2). forces
it to be an integer followed by a ".".

Jean-Paul


From MrJean1 at gmail.com  Thu Jan 18 21:04:54 2007
From: MrJean1 at gmail.com (MrJean1)
Date: 18 Jan 2007 18:04:54 -0800
Subject: Match 2 words in a line of file
References: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
	<1169166223.073714.109620@51g2000cwl.googlegroups.com>
Message-ID: <1169172293.938820.103400@51g2000cwl.googlegroups.com>

Without using re, this may work (untested ;-):

def lines_with_words(file, word1, word2):
    """Print all lines in file that have both words in it."""
    for line in file:
        words = line.split()
        if word1 in words and word2 in words:
            print line


/Jean Brouwers


Rickard Lindberg wrote:
> elrondrules at gmail.com wrote:
> > Hi
> >
> > Am pretty new to python and hence this question..
> >
> > I have file with an output of a process. I need to search this file one
> > line at a time and my pattern is that I am looking for the lines that
> > has the word 'event' and the word 'new'.
> >
> > Note that i need lines that has both the words only and not either one
> > of them..
> >
> > how do i write a regexp for this.. or better yet shd i even be using
> > regexp or is there a better way to do this....
> >
> > thanks
>
> Maybe something like this would do:
>
> import re
>
> def lines_with_words(file, word1, word2):
>     """Print all lines in file that have both words in it."""
>     for line in file:
>         if re.search(r"\b" + word1 + r"\b", line) and \
>            re.search(r"\b" + word2 + r"\b", line):
>             print line
>
> Just call the function with a file object and two strings that
> represent the words that you want to find in each line.
>
> To match a word in regex you write "\bWORD\b".
>
> I don't know if there is a better way of doing this, but I believe that
> this should at least work.



From nmm1 at cus.cam.ac.uk  Mon Jan  8 12:08:22 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 8 Jan 2007 17:08:22 GMT
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk> <entj5d$o4$1@south.jnrs.ja.net>
	<entkru$2vs$1@gemini.csx.cam.ac.uk>
	<50f5snF1fb5uqU2@mid.individual.net>
	<entpo0$d0g$1@gemini.csx.cam.ac.uk>
	<mailman.2425.1168272626.32031.python-list@python.org>
Message-ID: <enttq6$lj2$1@gemini.csx.cam.ac.uk>


In article <mailman.2425.1168272626.32031.python-list at python.org>, Fredrik Lundh <fredrik at pythonware.com> writes:
|> Nick Maclaren wrote:
|> 
|> > The use of different precisions for the two cases is not, however,
|> > and it is that I was and am referring to.
|> 
|> that's by design, of course.  maybe you should look "repr" up in the 
|> documentation ?

I think that you should.  Where does it say that tuple's __str__ is
the same as its __repr__?

The obvious interpretation of the documentation is that a sequence
type's __str__ would call __str__ on each sub-object, and its __repr__
would call __repr__.


Regards,
Nick Maclaren.


From bearophileHUGS at lycos.com  Mon Jan 22 16:09:09 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Jan 2007 13:09:09 -0800
Subject: Best way to document Python code...
In-Reply-To: <ep37ov$vvf$1@sunce.iskon.hr>
References: <1169492869.101706.253620@38g2000cwa.googlegroups.com>
	<tj9th.13185$pQ3.6593@newsread4.news.pas.earthlink.net>
	<ep37ov$vvf$1@sunce.iskon.hr>
Message-ID: <1169500149.885333.170320@s34g2000cwa.googlegroups.com>

Boris Ozegovic:
> Does Python has API just like in Java, for example
> http://java.sun.com/j2se/1.5.0/docs/api/allclasses-noframe.html ctrl-f and
> than click on class you are searching for, and finally you get clean list
> of all fields and methods.  Where can I find similar in Python, for
> example, if I would like to see which methods list/dictionary has.

You can do that from the shell, with help(name) or dir(name), where
name can be a class, object, most things.

Bye,
bearophile



From fdelente at mail.cpod.fr  Sat Jan 27 07:51:24 2007
From: fdelente at mail.cpod.fr (Fabrice DELENTE)
Date: 27 Jan 2007 12:51:24 GMT
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
Message-ID: <45bb4acc$0$25898$426a74cc@news.free.fr>

It's solved, it was a locale problem: I put

import locale

locale.setlocale(locale.LC_ALL,"fr_FR.iso8859-1")

at the beginning of the script, and now the 8-bit-chars show up correctly.

Thanks all for your help.

-- 
Fabrice DELENTE


From sean at seanodonnell.com  Fri Jan  5 02:57:17 2007
From: sean at seanodonnell.com (Sean O'Donnell)
Date: Thu, 04 Jan 2007 23:57:17 -0800
Subject: Problem installing MySQLdb/1.2.1_p2 with Python/2.4.1 and MySQL/5.0.18
Message-ID: <459e0752$0$17009$4c368faf@roadrunner.com>

Hi,

I can't seem to get MySQLdb/1.2.1p2 to install on Slackware/10.2, with
Python/2.4.1, and MySQL/5.0.18.

The following command:

$ python setup.py build 2> setup.err

returns the following errors:

http://pastebin.com/851624

Any suggestions?

Thanks!

Sean


From tomas at fancy.org  Mon Jan  1 13:58:30 2007
From: tomas at fancy.org (Tom Plunket)
Date: Mon, 01 Jan 2007 10:58:30 -0800
Subject: DOS, UNIX and tabs
References: <1167243140.687557.93320@f1g2000cwa.googlegroups.com>
	<emugom$t37$01$1@news.t-online.com>
	<pan.2006.12.28.03.22.21.587236@REMOVEME.cybersource.com.au>
	<mailman.2143.1167453331.32031.python-list@python.org>
	<en5e18$l39$03$1@news.t-online.com>
	<mailman.2163.1167518010.32031.python-list@python.org>
	<pan.2006.12.31.10.44.59.201060@gmx.net>
	<rolgp212fd1cshs8404v3c039he6hs4tvj@4ax.com>
	<en9v4k$4sg$2@lust.ihug.co.nz>
Message-ID: <kcmip2dt5h9s2r9p4unrei8ehcutj2kuu5@4ax.com>

Lawrence D'Oliveiro wrote:

> I think there should be a single environment variable, perhaps
> called "TABS", which specifies the tab settings across all relevant tools
> that work with text, including less and diff. So for example setting this
> as
> 
>     export TABS=4
> 
> will cause these tools to treat tabs as equivalent to stepping to the next
> multiple of four columns from the start of the line.

Maybe I'm also weird, but I use a variable-pitch font when programming
in Python.  So a "tab equals some number of spaces" really isn't useful
to me.  My setup is, "tab equals this much space".


-tom!

-- 


From webraviteja at gmail.com  Thu Jan 18 22:57:02 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 18 Jan 2007 19:57:02 -0800
Subject: Making a simple script standalone
In-Reply-To: <3c8584-6mc.ln1@whisper.very.softly>
References: <5d1084-5j7.ln1@whisper.very.softly>
	<mailman.2820.1169032834.32031.python-list@python.org>
	<ek8284-od9.ln1@whisper.very.softly>
	<mailman.2856.1169075613.32031.python-list@python.org>
	<eondm3$ouo$1@news.albasani.net>
	<3c8584-6mc.ln1@whisper.very.softly>
Message-ID: <1169179022.000434.219030@38g2000cwa.googlegroups.com>



On Jan 18, 2:19 pm, Rikishi 42 <fsck_s... at telenet.be> wrote:
> On Thursday 18 January 2007 10:13, robert wrote:
>
> > stay with py23 for "a script" (and more) and make <700kB
> > independent distros - UPX and 7zip involved:
>
> >http://groups.google.com/group/comp.lang.python/msg/edf469a1b3dc3802Thanks, that might be an option. But I might just convince the person to
> let me install Python.  :-(

Like you note, it is far simpler to just install Python. Rarely does a
proper cost benefit analysis show any advantage for all the time you
put in for saving a few MB off the installer (since you noted that you
got it working with Py2Exe), especially when you seem to be installing
the app for just one person. How big is your Exe with Py2Exe? Say 3MB?
Is making it 1 MB worth maybe 2 hrs of your time for 1 install?

But just for kicks, check out ShedSkin. Since you mentioned that you
were using very few modules (ShedSkin supports os, stat, string, time),
it might just work. ShedSkin translates your Python code to fast C++
code that can be compiled to a tight app.

http://sourceforge.net/projects/shedskin/

Ravi Teja.



From __peter__ at web.de  Fri Jan 26 10:36:26 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 26 Jan 2007 16:36:26 +0100
Subject: how to remove c++ comments from a cpp file?
References: <1169801197.941449.303000@v33g2000cwv.googlegroups.com>
	<mailman.3190.1169802638.32031.python-list@python.org>
	<1169805244.879280.235660@v45g2000cwv.googlegroups.com>
	<mailman.3191.1169807705.32031.python-list@python.org>
	<45ba1cfe$0$5084$ba4acef3@news.orange.fr>
Message-ID: <epd751$518$03$1@news.t-online.com>

Laurent Rahuel wrote:

> And using the codecs module

Why would you de/encode at all?

Peter


From gagsl-py at yahoo.com.ar  Sat Jan 20 22:38:00 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 21 Jan 2007 00:38:00 -0300
Subject: Code reformater?
In-Reply-To: <pan.2007.01.21.03.15.45.787139@REMOVE.THIS.cybersource.com .au>
References: <poe3r2ha92p6vrhtk9b2piso337djv4boo@4ax.com>
	<eotjsg$ff68$1@zam602.zam.kfa-juelich.de>
	<mailman.2956.1169347902.32031.python-list@python.org>
	<pan.2007.01.21.03.15.45.787139@REMOVE.THIS.cybersource.com.au>
Message-ID: <7.0.1.0.0.20070121002325.057ece08@yahoo.com.ar>

At Sunday 21/1/2007 00:15, Steven D'Aprano wrote:

>On Sat, 20 Jan 2007 23:51:24 -0300, Gabriel Genellina wrote:
>
> > As the indentation *is* significant in python, none of the above can
> > help if you lose the indentation. Try to reconstruct this:
> >
> > def foo():
> > if a>0:
> > if b>0:
> > print 1
> > print 2
> > else:
> > return 3
> > return 4
> >
> > The tools may help to make the indentation consistent (tabs/8
> > spaces/4 spaces/2 spaces mixed) or look better, but not to make it right.
>
>
>Sure -- but a heuristic that gets it right *sometimes* may still be
>useful, provided the user knows that the code may not be indented
>correctly.
>
>There are lots of legal Python blocks where the indentation CAN be
>reconstructed correctly, and only a relatively small proportion where it
>can't --

I'd say absolutely the opposite. Try the example above. Or this one, simpler:

def foo():
if a>0:
if b>0:
print 1
print 2

Which level should be 'print 2' assigned to? There are 3 choices. 
What if there is a third print? There are 3, 2, or 1 possibilities, 
depending on where you put the previous one. The same for any other 
statement below.
The problem is, after a colon, you know that a new block begins and 
you must indent, but you don't know when that block ends except in a 
few cases (an else clause, by example, and only if there was a single 
preceding if).

>the tool could do its best, and warn the user when there are
>indents that can't be dealt with. Or even refuse the temptation to guess,
>but re-indent whatever parts of the code it is sure about.

...almost nothing, I'm afraid... :(

>Still, it is better not to lose the indentation in the first place.

Sure!


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From PrinsRoy at gmail.com  Tue Jan 16 15:31:35 2007
From: PrinsRoy at gmail.com (Snirp)
Date: 16 Jan 2007 12:31:35 -0800
Subject: mysqldb, file _mysql.so needed
Message-ID: <1168979495.057528.271820@m58g2000cwm.googlegroups.com>

Good day to you all!

I am trying to get mysqldb working on an ISP webserver. They will not
not help me, but I think it will be possible. The thing is that there
is one binary file necessary for this to work (found in python
site-packages):

_mysql.so (on linux)

I am a poor soul stuck with windows, so i have the _mysql.pyd variant.
Can anyone point me out how to acquire the _mysql.so file?

Or, if possible, can any linux user share it with me or compile this
file from source for me? It is found at:

http://surfnet.dl.sourceforge.net/sourceforge/mysql-python/MySQL-python-1.2.1_p2.tar.gz

I do not know if it will make any difference, but the ISP system is a
Fedora core 4 system.


Thanks in advance.

BTW will a webserver even allow me to run this .so file?



From laurent.pointal at limsi.fr  Tue Jan 23 03:10:03 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 23 Jan 2007 09:10:03 +0100
Subject: Python Windows Editors
In-Reply-To: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
Message-ID: <ep4gp8$het$1@upsn250.cri.u-psud.fr>

W. Watson a ?crit :
> I downloaded python-2.5.msi and installed it. I believe its editor is
> IDE. I understand there's a Win editor called pythonwin. I believe it's
> in the download pywin32-210.win32-py2.5.exe, but I'm not sure if this
> exe file has just the editor or all of Python. Comments? If not how do I
> get the PythonWin editor by itself?
> 
> BTW, one of the features I did not like of IDE is the limited file Print
> command. It puts everything in 16pt type, and gives no choice over what
> pages should be printed. Maybe there's an option?
> 
>          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
>              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
>               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet
> 
>                Two laws Newton and Einstein didn't discover:
>                  1. Time is money.
>                  2. Matter will be damaged in direct proportion
>                     to its value.

Have you take a look at the IDEs page in the Python Wiki (python.org)?

http://wiki.python.org/moin/IntegratedDevelopmentEnvironments

A+

Laurent.




From skip at pobox.com  Tue Jan  2 09:54:54 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 2 Jan 2007 08:54:54 -0600
Subject: python2.5 frameobject - how to upgrade?
In-Reply-To: <459a6894$0$9322$ba620e4c@news.skynet.be>
References: <459a6894$0$9322$ba620e4c@news.skynet.be>
Message-ID: <17818.29246.802532.12101@montanaro.dyndns.org>


    Helmut> I'd like to install a package ('rekall') which uses
    Helmut> frame->f_nlocals which is no longer contained in frameobject.h.

    Helmut> What's the recommended way to upgrade such an application?

I suspect PySequence_Length(frame->f_locals) will do the trick.

Skip


From joel at rosdahl.net  Mon Jan  1 16:25:51 2007
From: joel at rosdahl.net (Joel Rosdahl)
Date: Mon, 01 Jan 2007 22:25:51 +0100
Subject: are there Tomboy and F-Spot equivalents?
In-Reply-To: <857993970612210901h5e56acf6lc726fc7a6315555a@mail.gmail.com>
	(Tshepang Lekhonkhobe's message of "Thu, 21 Dec 2006 19:01:36 +0200")
References: <857993970612210901h5e56acf6lc726fc7a6315555a@mail.gmail.com>
Message-ID: <87zm92wiao.fsf@rosdahl.net>

"Tshepang Lekhonkhobe" <tshepang at gmail.com> writes:

> I dislike installing the entire Mono stack simply to take notes and
> manage photos, and am totally biased towards Python. At least for
> search I got Tracker, instead of Beagle. Are there equvalents
> applications for Tomboy and F-Spot which are written in Python.

Kofoto <http://kofoto.rosdahl.net> is not exactly equivalent to F-Spot
but quite similar in some aspects; it's focused on organizing and
viewing photos, not editing them. It's written in Python using PyGTK.

-- 
Regards,
Joel Rosdahl <joel at rosdahl.net>
Key BB845E97; fingerprint 9F4B D780 6EF4 5700 778D  8B22 0064 F9FF BB84 5E97


From exogen at gmail.com  Mon Jan  8 13:35:28 2007
From: exogen at gmail.com (Brian Beck)
Date: Mon, 08 Jan 2007 13:35:28 -0500
Subject: More Efficient fnmatch.fnmatch for multiple patterns?
References: <1168279822.921033.267210@v33g2000cwv.googlegroups.com>
Message-ID: <enu2tf$ico$1@sea.gmane.org>

abcd wrote:
> I am using fnmatch.fnmatch to find some files.  The only problem I have
> is that it only takes one pattern...so if I want to search using
> multiple patterns I have to do something like....
> 
> patterns = ['abc*.txt', 'foo*']
> 
> for p in patterns:
>     if fnmatch.fnmatch(some_file_name, p):
>         return True

I don't see anything in the fnmatch and glob modules... but I didn't look
very hard because what the heck is wrong with the four line solution you
have? Looks fine to me.

-- 
Brian Beck
Adventurer of the First Order



From dingbat at codesmiths.com  Wed Jan 31 11:11:22 2007
From: dingbat at codesmiths.com (Andy Dingley)
Date: 31 Jan 2007 08:11:22 -0800
Subject: Python tools to manipulate JARs ?
Message-ID: <1170259882.613769.118210@v45g2000cwv.googlegroups.com>

I run build processes for a Java shop using Python (and some Ant).

Would anyone care to suggest favoured tools for manipulating the
innards of JARs? Or do I just treat them as plain zipfiles and get
stuck right in there?

Mainly I'm trying to query lists of classes and their embedded
versions and do some library dependency reporting. Performance speed
is starting to be an issue, as there's 1500+ classes in this bucket
and it's an interactive query.

Thanks for any suggestions



From Thomas.Ploch at gmx.net  Fri Jan  5 12:31:08 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Fri, 05 Jan 2007 18:31:08 +0100
Subject: Dividing integers...Convert to float first?
In-Reply-To: <1168017342.255981.134400@11g2000cwr.googlegroups.com>
References: <1168017342.255981.134400@11g2000cwr.googlegroups.com>
Message-ID: <459E8B5C.6020804@gmx.net>

redefined.horizons at gmail.com schrieb:
> I'm still pretty new to Python. I'm writing a function that accepts
> thre integers as arguments. I need to divide the first integer by te
> second integer, and get a float as a result. I don't want the caller of
> the function to have to pass floats instead of integers. How do I
> convert the arguments passed to the function into floats before I do
> the division? Is this necessary, or is their a better way?
> 
> Thanks,
> 
> Scott Huey
> 

Yes, it is necessary. If you divide two integers, the result will be an
integer.

 >>> 1/2
 0

You need the function float() -> float because a division between
integers and floats will have floats as their results

 >>> float(1)/2
 0.5


From tsuraan at gmail.com  Mon Jan  8 10:59:34 2007
From: tsuraan at gmail.com (tsuraan)
Date: Mon, 8 Jan 2007 09:59:34 -0600
Subject: Suitability for long-running text processing?
In-Reply-To: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>
References: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>
Message-ID: <84fb38e30701080759p3d080a3fx93244c839d6d0d5d@mail.gmail.com>

After reading
http://www.python.org/doc/faq/general/#how-does-python-manage-memory, I
tried modifying this program as below:

a=[]
> for i in xrange(33,127):
>  for j in xrange(33,127):
>   for k in xrange(33,127):
>    for l in xrange(33, 127):
>     a.append(chr(i)+chr(j)+chr(k)+chr(l))


import sys
sys.exc_clear()
sys.exc_traceback = sys.last_traceback = None

del(a)
> import gc
> gc.collect()


And it still never frees up its memory.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070108/fc0ed798/attachment.html>

From palmem at gmail.com  Wed Jan 17 23:36:21 2007
From: palmem at gmail.com (palmem at gmail.com)
Date: 17 Jan 2007 20:36:21 -0800
Subject: Socket Error 106: 'Transport endpoint is already connected'
Message-ID: <1169094981.335679.179430@l53g2000cwa.googlegroups.com>

I am trying to write a simple FTP server in order to learn about
sockets
This is my first time trying sockets

This code should take a connection on port 8110, dump it to a client
"thread" (not a thread yet), print "Test\n" to the thread, and close
everything.
It fails on creating the client thread with error  106: 'Transport
endpoint is already connected'

On running the code:
dftp starting
getting the socket at 127.0.0.1 at port 8110
listening for 5 connections
entering main loop
####pause here until telnet####
found a client @ <socket._socketobject object at 0x2ba16f6cd650> addr:
('127.0.0.1', 58643)
Creating a new client socket
Trying to connect
Traceback (most recent call last):
  File "./dftpd.py", line 46, in ?
    main()
  File "./dftpd.py", line 41, in main
    clientThread = Connection(clientsocket, address);
  File "/home/palmer/prog/dftp/dftpd/connection.py", line 29, in
__init__
    self.sock.connect(a);
  File "<string>", line 1, in connect
socket.error: (106, 'Transport endpoint is already connected')

Telnet output:
$ telnet localhost 8110
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.

Here's my code:
config is a stand-in for a config-file reader, now it just runs
localhost:8110 and 5 connections
debug just prints to standard out (the number afterwords is the level,
but now everything is printed)
#################dftpd.py#########################
import debug
import socket
import config
from connection import Connection

shouldRun=True;

def main():
	debug.stdout("dftp starting", 1)
	debug.stdout("getting the socket at " + str(config.listenAddress()) +
" at port " + str(config.listenPort()), 10);
	sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM);
	sock.bind((config.listenAddress(), config.listenPort()));
	debug.stdout("listening for " + str(config.listenConnections()) + "
connections", 10);
	sock.listen(config.listenConnections());
	debug.stdout("entering main loop", 10);
	while shouldRun:
		(clientsocket, address) = sock.accept();
		debug.stdout("found a client @ " + str(clientsocket) + " addr: " +
str(address), 10);
		clientThread = Connection(clientsocket, address);
		print clientThread.write("Test\n");
		clientThread.close;
	sock.close();

main()

########################connection.py########################
import debug;
import socket;

class Connection:
	def __init__(self, s, a):
		debug.stdout("Creating a new client socket", 15);
		self.sock = s;
		debug.stdout("Trying to connect", 15);
		self.sock.connect(a);
		debug.stdout("Making the file over the socket", 15);
		self.file = self.sock.makefile();
	def read():
		return file.read();
	def write(out):
		file.write(out);
	def close():
		file.close();
		sock.close();



From gandalf at designaproduct.biz  Wed Jan 31 13:50:20 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Wed, 31 Jan 2007 19:50:20 +0100
Subject: Python tools to manipulate JARs ?
In-Reply-To: <1170259882.613769.118210@v45g2000cwv.googlegroups.com>
References: <1170259882.613769.118210@v45g2000cwv.googlegroups.com>
Message-ID: <45C0E4EC.5030206@designaproduct.biz>

Andy Dingley ?rta:
> I run build processes for a Java shop using Python (and some Ant).
>
> Would anyone care to suggest favoured tools for manipulating the
> innards of JARs? Or do I just treat them as plain zipfiles and get
> stuck right in there?
>
> Mainly I'm trying to query lists of classes and their embedded
> versions and do some library dependency reporting. Performance speed
> is starting to be an issue, as there's 1500+ classes in this bucket
> and it's an interactive query.
>   
I believe that you can rename any jar file to .zip and use zip tools to 
list its contents.

   Laszlo



From removethis.kartic.krishnamurthy at gmail.com  Fri Jan 12 12:31:18 2007
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Fri, 12 Jan 2007 12:31:18 -0500
Subject: Any python based "Live Web Chat Support"
In-Reply-To: <1168618282.128710.52500@l53g2000cwa.googlegroups.com>
References: <1168618282.128710.52500@l53g2000cwa.googlegroups.com>
Message-ID: <45A7C5E6.1040303@gmail.com>

johnny sayeth,  on 01/12/2007 11:11 AM:
 > Is there any open source "live web chat support" program or script out
 > there?  Any you can recommend?

Why don't you install ejabberd (a Jabber server implemented in erlang) 
and install Muckl (http://zeank.in-berlin.de/muckl/), an AJAX client for 
multi-user chat (or Jwchat for one on one chat). Both Muckl and JWChat 
are embeddable in a web page, as they use just HTML/Javascript, with 
some work.

Other than that, if you want to stick to a Python solution, I do believe 
Nevow project comes with a live chat demo, which you can customize.

--Kartic


From nagle at animats.com  Thu Jan  4 03:06:48 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 04 Jan 2007 08:06:48 GMT
Subject: C/C++, Perl, etc. to Python converter
In-Reply-To: <5034u9F1dg9r9U1@mid.uni-berlin.de>
References: <G3Qmh.94$9v1.124@nntpserver.swip.net>	<1167839629.435980.311750@k21g2000cwa.googlegroups.com>
	<mailman.2245.1167841661.32031.python-list@python.org>
	<5034u9F1dg9r9U1@mid.uni-berlin.de>
Message-ID: <sA2nh.13518$yC5.6094@newssvr27.news.prodigy.net>

Diez B. Roggisch wrote:
> 
>>
>> I think that it *is* possible to do it, but a whole lot of work had to
>> be done to achieve this. It is all about how many rules (like how to
>> convert this block of unreadable code of language X into a readable
>> python block) you are willing to find/program (and these are a lot). It
>> is a almost gigantic task to make this work proper, but it definitely
>> *is* possible.
> 
> 
> It is definitely _not_ possible. There are so many design decisions that 
> are differing based on what a language offers - e.g. generators, garbage 
> collection, precise control over memory layout and so on.

    Inter-language translators have been written.  There's usually
a performance penalty, which can be severe when the idioms of
the languages are quite different.

    Perl to Python translation might be worth doing.  The
languages have quite different syntax, but roughly the same
functionality.  You'd probably have to write a set of libraries
in Python with the equivalent definitions to their Perl
counterparts, but that's just time-consuming, not difficult.

				John Nagle


From horpner at yahoo.com  Thu Jan 11 08:58:17 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 11 Jan 2007 14:58:17 +0100
Subject: Print message with Colors
References: <1168500252.143831.235250@i56g2000hsf.googlegroups.com>
	<eo4s7b$djl$1@upsn250.cri.u-psud.fr>
Message-ID: <slrneqcgor.1n0.horpner@FIAD06.norwich.edu>

On 2007-01-11, Laurent Pointal <laurent.pointal at limsi.fr> wrote:
> prk a ?crit :
>> Hi Folks,
>> 
>> Is there any procesure for print messages with colors.
>
> Yes, see:
>
> http://www.google.fr/search?q=python+print+color
> http://groups.google.fr/groups?as_q=python+print+color&num=100&as_ugroup=comp.lang.python
>
> See also ANSI escape sequences for the more general subject of
> color printing on terminals.

If you're using Windows NT, 2000, or XP don't bother reading
about ANSI escape sequences. They will not work at all with
Python on those platforms, even if you use the crummy old
COMMAND.COM. I believe it's because Python on those platforms in
a console application, which on NT, 2000 and XP doesn't support
ANSI escape sequences. It makes IPython's appearance less cool. :-(

Try http://effbot.org/downloads/#console for color output that
works.

-- 
Neil Cerutti
We're going to be exciting.  Of course, it was exciting when the Titanic went
down. --Bob Weiss


From dickey at saltmine.radix.net  Sat Jan 27 08:36:19 2007
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Sat, 27 Jan 2007 13:36:19 -0000
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
	<45ba50c7$0$31432$426a74cc@news.free.fr>
	<slrnerks72.jc.horpner@FIAD06.norwich.edu>
	<12rl5mq4nnqoea0@corp.supernews.com>
	<45bafda7$0$2417$426a74cc@news.free.fr>
Message-ID: <12rmlajpjkq6i2e@corp.supernews.com>

Fabrice DELENTE <fdelente at mail.cpod.fr> wrote:
> My system is Linux, and the distribution is Slackware 10.1.

> I have

> /lib/libncurses.so.5.4
> /lib/libncursesw.so.5.4

> so I even have the wide-chars version available. Any hint on the python
> configuration? I didn't find any function that would allow the unrestricted
> display of 8-bit chars.

It's more complicated than that:  python's loading "ncurses"
dynamically.

It doesn't matter much (to python) which one it loads, but it's
specifying the library name explicitly.  At the same time, some other
packages (such as readline) are _separately_ loading the ncurses library
- and they also specify a library name.  Rather than abstracting that
stuff out to another (more easily changed) level, it's embedded in the code.

If the initialization script is changed to load "ncursesw" then python
can use ncursesw without further change.  There are a few patches to the
configuration that I've seen mentioned in the bug reports to enable
python to do this.  Those are patches to python of course...

(this was a topic of discussion on this newsgroup about a year ago).

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From Bulkan at gmail.com  Fri Jan  5 06:53:52 2007
From: Bulkan at gmail.com (placid)
Date: 5 Jan 2007 03:53:52 -0800
Subject: Calculating Download Rate
Message-ID: <1167998032.425050.264280@i15g2000cwa.googlegroups.com>

Hi all,

I want be able to work the download rate for downloading HTML pages
using the urllib.urlopen(url). The way i thought i would do this is
start a timer (or log the current time) just before calling this
function and the stopping the timer (logging the current time again and
the working out the difference) this would give me duration that it
took to retrieve the web-page, not the download rate?

Thanks in advance.



From borntonetwork at gmail.com  Wed Jan 17 09:44:33 2007
From: borntonetwork at gmail.com (borntonetwork)
Date: 17 Jan 2007 06:44:33 -0800
Subject: The proper use of QSignalMapper
Message-ID: <1169045073.138626.60770@l53g2000cwa.googlegroups.com>

Hi.

I am trying to implement QTCore.QSignalMapper using PyQT. I finally got
to a point where I don't receive any compile or runtime error messages,
but I also do not see the final slot function fire off. Here is a
snippet of the code:

        self.signalMapper = QtCore.QSignalMapper(window)
        # Use qsignalmapper to use of one slot function for multiple
        # widgets. The map() function sends the slot an extra param
        # that identifies the sender.
        for idx in range(1, maxIngredients+1):
            wName = 'chkProductIngredientsDelete_'+str(idx)
            w = self.__dict__[wName]
            self.app.connect(w, QtCore.SIGNAL("stateChanged(int)"),
                self.signalMapper,
                QtCore.SLOT("self.signalMapper.map"))
            self.signalMapper.setMapping(w, idx)

        self.app.connect(self.signalMapper, QtCore.SIGNAL(
            "self.signalMapper.mapped(int)"),
            self.deleteProductIngredient)

    def deleteProductIngredient(self, state, widgetIdx):
        """Delete a product ingredient."""
        print "INSIDE FUNCTION\n"

The idea here is to iterate through several checkbox widgets (named
"chkProductIngredientsDelete_1, _2, etc.) and connect each object's
"stateChanged" signal to the mapper's map() function, then connect the
map() function to the actual slot, deleteProductIngredient().

By the way, I've checked to ensure the statements inside the loop are
being executed.



From apotheos at gmail.com  Tue Jan 30 18:55:52 2007
From: apotheos at gmail.com (apotheos at gmail.com)
Date: 30 Jan 2007 15:55:52 -0800
Subject: Sorting a List of Lists
Message-ID: <1170201351.881776.257790@q2g2000cwa.googlegroups.com>

I can't seem to get this nailed down and I thought I'd toss it out 
there as, by gosh, its got to be something simple I'm missing.

I have two different database tables of events that use different 
schemas. I am using python to collate these records for display. I do 
this by creating a list of lists that look roughly like this:

events = [['Event URL as String', 'Event Title as String ', Event Date 
as Datetime], ...]

I then thought I'd just go events.sort(lambda x,y: x[2]<y[2]) and call 
it a day. That didn't work. But then lamda functions like to be very 
simple, maybe object subscripts aren't allowed (even though I didn't 
get an error). So I wrote a comparison function that looks much as you 
would expect:

def date_compare(list1, 
list2):
    x = list1[2]
    y = list2[2]
    if 
x>y:
        return 
1
    elif 
x==y:
        return 
0
    else: # 
x<y
        return -1

But as before sorting with this function returns None.

What have I overlooked?



From jeremit0 at gmail.com  Tue Jan 30 10:55:30 2007
From: jeremit0 at gmail.com (jeremito)
Date: 30 Jan 2007 07:55:30 -0800
Subject: Help me override append function of list object
In-Reply-To: <epnp99$sqn$01$1@news.t-online.com>
References: <1170171317.866549.261060@a34g2000cwb.googlegroups.com>
	<epnp99$sqn$01$1@news.t-online.com>
Message-ID: <1170172528.635977.172030@v45g2000cwv.googlegroups.com>



On Jan 30, 10:47 am, Peter Otten <__pete... at web.de> wrote:
> jeremito wrote:
> > I have created a class that inherits from the list object.  I want to
> > override the append function to allow my class to append several
> > copies at the same time with one function call.  I want to do
> > something like:
>
> > import copy
>
> > class MyList(list):
> >   __init__(self):
> >     pass
>
> >   def append(self, object, n=1):
> >     for i in xrange(n):
> >         self.append(copy.copy(object))
>
> > Now I know this doesn't work because I overwrite append, but want the
> > original functionality of the list object.  Can someone help me?Use list.append(self, obj) or super(MyList, self).append(obj), e. g.:
>
> >>> import copy
> >>> class List(list):...     def append(self, obj, n=1):
> ...             for i in xrange(n):
> ...                     super(List, self).append(copy.copy(obj))
> ...>>> items = List()
> >>> items.append(42, 3)
> >>> items[42, 42, 42]
>
> Peter

Thank you so much.  I'm glad it is so easy.
Jeremy



From miladmovie at gmail.com  Fri Jan 19 04:11:10 2007
From: miladmovie at gmail.com (Milad Rastian)
Date: Fri, 19 Jan 2007 12:41:10 +0330
Subject: error when import gtk.glade
Message-ID: <56f73e4e0701190111g7e7ca405g67c8d023c86e75fe@mail.gmail.com>

hello
when I import gtk.glade I got this error :

Traceback (most recent call last):
  File "MainWindow.py", line 20, in ?
    import gtk.glade
ImportError: DLL load failed: The specified module could not be found.

I setup gtk and when I create my interface in my code my gtk window open
correctly
tnx
-- 
/--------------------
Milad Rastian
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070119/365a01e2/attachment.html>

From nmm1 at cus.cam.ac.uk  Sat Jan 13 05:40:22 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 13 Jan 2007 10:40:22 GMT
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<mailman.2597.1168550439.32031.python-list@python.org>
	<eo6ia5$5bt$1@gemini.csx.cam.ac.uk>
	<mailman.2643.1168611301.32031.python-list@python.org>
	<eo883j$l9d$1@gemini.csx.cam.ac.uk>
	<mailman.2648.1168616202.32031.python-list@python.org>
	<eo8b1r$r9c$1@gemini.csx.cam.ac.uk>
	<mailman.2664.1168630485.32031.python-list@python.org>
	<eo8oa0$o4o$1@gemini.csx.cam.ac.uk>
	<mailman.2666.1168632007.32031.python-list@python.org>
Message-ID: <eoacum$55u$1@gemini.csx.cam.ac.uk>


In article <mailman.2666.1168632007.32031.python-list at python.org>,
"Simon Brunning" <simon at brunningonline.net> writes:
|> >
|> > Financial calculations need decimal FIXED-point, with a precisely
|> > specified precision.  It is claimed that decimal FLOATING-point
|> > helps with providing that, but that claim is extremely dubious.
|> > I can explain the problem in as much detail as you want, but would
|> > very much rather not.
|> 
|> Sorry, Nick, you might have to. ;-)
|> 
|> I'm not educated in these matters, so I'd genuinely like to know why
|> you say that. Not educated, but I do have some experience; I've used
|> both fixed and floating point Decimal types extensively, and I've
|> found floating types superior. More fiddly, certainly, 'cos you have
|> to explicitly round back down to the precision that you want when you
|> want. But explicit is better than implicit - the number of subtle
|> rounding bugs that I've had to fix 'cos someone didn't realise where
|> rounding was occurring is, uh, well, it happens from time to time. ;-)
|> 
|> What am I missing?

I will try to give a simple explanation, but I need to gloss over a
hell of a lot.  The precision is the number of digits after the
decimal point.

Financial calculations are defined in terms of decimal fixed-point,
with precisely specified precisions and rounding rules (though both
may vary with context, even in one expression).  Now, let's ignore
the arcana (especially as I know only a little of them) and note only
the following:

The traditional way of implementing fixed-point is as scaled integers,
and this is easy and reliable.  It is tricky if the USER is expected
to do it, but it is trivial to excapsulate.  Hell, even PLAN (the ICL
1900 assembler) did it!

If a number is calculated in floating-point, decimal or otherwise, and
needs any rounding, then it will NOT follow the right rules and no
reasonable amount of post-operation munging will enable it to do so.
Fixing up double rounding problems is inherently foul, so it is
ESSENTIAL that no operation is approximate.

In true fixed-point, the result of multiplication has a precision that
is the sum of the input precisions, and addition, subtraction and
remainder the maximum of the two.  Division is required to specify a
target precision and rounding rule.  Overflow is raised when the total
number of digits exceeds the space available.

A typical financial multiplication is a monetary amount multiplied by
a rate (say VAT, interest or a conversion rate).  That typically has
up to 5 digits, but there is no reason that it can't be more, and
it is possible that some calculations multiply several rates together.

When emulated in floating-point, the exception raised when the number
of digits exceeds the space available is Inexact (there is a slightly
different one for decimal, but the differences don't matter here).  So,
to get correct fixed-point flag handling, Inexact must be mapped to
Overflow.

Except for division, where there is no way to use the floating-point
primitive as a basis for the fixed-point one, so it has to be done by
hand, tediously and slowly.

But, in scientific (and current Python) usage, Inexact is always ignored
and Overflow is almost always an error.  If we do that mapping, it will
break ALL scientific code.  But, if we DON'T do that mapping, we will
abandon any attempt at getting reliable fixed-point overflow detection.
So you can't mix the two in the same program - which was one of the
main objectives of using decimal floating-point!

The counter-argument is that everyone will use 128-bit arithmetic for
all purposes.  Well, that is hooey, because it will cause MAJOR problems
for both the embedded people (logic, power and performance) and HPC
people (performance, mainly bandwidth).  Python could, probably.

However, that isn't what the Decimal module does anyway.  People will
specify more digits than they possibly need, not realising that they
need to specify many MORE if they are going to support multiplication.

Coming back to the start, is fixing that little lot up REALLY easier
than encapsulating scaled integers to give a proper fixed-point type?
I think that you will find that it is much harder!


Regards,
Nick Maclaren.


From soyouthinkimgonnalikethis at hotmail.com  Thu Jan  4 11:42:00 2007
From: soyouthinkimgonnalikethis at hotmail.com (Eric Price)
Date: Thu, 04 Jan 2007 11:42:00 -0500
Subject: what is this?
Message-ID: <BAY108-F8FCEACF3601F110478287A0B80@phx.gbl>

Hello;
I'm studying some code examples from the python cookbook site. I came across 
this:

def colsplit(l, cols):
    rows = len(l) / cols
    if len(l) % cols:
        rows += 1
    m = []
    for i in range(rows):
        m.append(l[i::rows])
    return m

What I'd like to know is what is the double colon? What does it do?
        m.append(l[i::rows])

Thanks,
Eric

_________________________________________________________________
Type your favorite song.? Get a customized station.? Try MSN Radio powered 
by Pandora. http://radio.msn.com/?icid=T002MSN03A07001



From tpawley at gmail.com  Fri Jan 12 02:27:29 2007
From: tpawley at gmail.com (Torabisu)
Date: 11 Jan 2007 23:27:29 -0800
Subject: General Question About Python
In-Reply-To: <1168337298.574881.121470@i15g2000cwa.googlegroups.com>
References: <1168254451.098796.144790@42g2000cwt.googlegroups.com>
	<1168336603.962731.5470@11g2000cwr.googlegroups.com>
	<1168337298.574881.121470@i15g2000cwa.googlegroups.com>
Message-ID: <1168586849.047301.301680@s34g2000cwa.googlegroups.com>


billie wrote:
> Torabisu wrote:
>
> > Its quite weird, we're looking for Python skills but are battling to
> > find at the moment...  Normally Python on its own will probably not
> > land you a job, but the last two companies I've worked for are doing
> > indepth Python development, so hopefully the tables are turning a bit.
>
> I can tell the same for Italy.
> Where are you from?

Cape Town, South Africa.  There is a strong Unix following here, but
more on the System Administration side, not really the software
development side with regards to Python.  Python more being used for
task automation and shell scripting.



From __peter__ at web.de  Thu Jan 18 05:51:48 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 18 Jan 2007 11:51:48 +0100
Subject: One more regular expressions question
References: <1169113767.320500.71200@11g2000cwr.googlegroups.com>
Message-ID: <eonjfl$lb9$03$1@news.t-online.com>

Victor Polukcht wrote:

> I have a couple of strings like:
> 
> Unassigned Number (1)                                    32
> No Route To Destination (3)                              12
> Normal call clearing (16)                                   2654
> User busy (17)                                                 630
> No user respond (18)                                        5
> User alerting no answer (19)                             16
> Call rejected (21)                                             3
> Destination out of order (27)                             1
> Invalid number format (28)                                32
> Normal unspecified (31)                                   32
> No channel available (34)                                 2
> Temporary failure (41)                                      11
> Switching equipment congestion (42)                4
> Resource unavailable unspecified (47)               2
> Bearer capability not authorized (57)                 73
> Incomp. dest. / Non-existent CUG (88)              1
> Recovery on timer expiry (102)                          2
> Interworking, unspecified (127)                          5
> 
> I need to get:
> Error code (value in brackets) - Value - Message.
> 
> My actual problem is i can't get how to include space, comma, slash.

The following solution is 100% regex-free :-)

>>> print lines
Unassigned Number (1)                                    32
No Route To Destination (3)                              12
Normal call clearing (16)                                   2654
User busy (17)                                                 630
No user respond (18)                                        5
User alerting no answer (19)                             16
Call rejected (21)                                             3
Destination out of order (27)                             1
Invalid number format (28)                                32
Normal unspecified (31)                                   32
No channel available (34)                                 2
Temporary failure (41)                                      11
Switching equipment congestion (42)                4
Resource unavailable unspecified (47)               2
Bearer capability not authorized (57)                 73
Incomp. dest. / Non-existent CUG (88)              1
Recovery on timer expiry (102)                          2
Interworking, unspecified (127)                          5

>>> [int(line.rsplit("(", 1)[1].split(")", 1)[0]) for line in
lines.splitlines()]
[1, 3, 16, 17, 18, 19, 21, 27, 28, 31, 34, 41, 42, 47, 57, 88, 102, 127]

Peter


From simon at brunningonline.net  Tue Jan  9 14:25:15 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Tue, 9 Jan 2007 19:25:15 +0000
Subject: Maths error
In-Reply-To: <Xns98B384E126F4Ctim111one@216.196.97.136>
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
	<envur1$rq1$1@gemini.csx.cam.ac.uk>
	<mailman.2480.1168350033.32031.python-list@python.org>
	<Xns98B384E126F4Ctim111one@216.196.97.136>
Message-ID: <8c7f10c60701091125w570a52ebj16301a5b7dfa1d0b@mail.gmail.com>

On 1/9/07, Tim Peters <tim.one at comcast.net> wrote:
> Well, just about any technical statement can be misleading if not qualified
> to such an extent that the only people who can still understand it knew it
> to begin with <0.8 wink>.

+1 QTOW

-- 
Cheers,
Simon B
simon at brunningonline.net


From bignose+hates-spam at benfinney.id.au  Thu Jan 18 20:10:54 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 19 Jan 2007 12:10:54 +1100
Subject: Iterator length
References: <1169162762.997894.180320@q2g2000cwa.googlegroups.com>
	<1169167258.553202.190130@m58g2000cwm.googlegroups.com>
	<1169168139.350836.79790@s34g2000cwa.googlegroups.com>
Message-ID: <87r6tr6ctd.fsf@benfinney.id.au>

bearophileHUGS at lycos.com writes:

> But sometimes you don't need the elements of a given iterator, you
> just need to know how many elements it has.

AFAIK, the iterator protocol doesn't allow for that.

Bear in mind, too, that there's no way to tell from outside that an
iterater even has a finite length; also, many finite-length iterators
have termination conditions that preclude knowing the number of
iterations until the termination condition actually happens.

-- 
 \       "When a well-packaged web of lies has been sold to the masses |
  `\    over generations, the truth will seem utterly preposterous and |
_o__)                 its speaker a raving lunatic."  -- Dresden James |
Ben Finney



From tundra at tundraware.com  Mon Jan  8 11:29:05 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Mon, 08 Jan 2007 10:29:05 -0600
Subject: Walking The Right Path
In-Reply-To: <1168252155.427645.316470@38g2000cwa.googlegroups.com>
References: <ghe974-gau2.ln1@eskimo.tundraware.com>
	<1168252155.427645.316470@38g2000cwa.googlegroups.com>
Message-ID: <b38a74-ul4.ln1@eskimo.tundraware.com>

Jakub Stolarski wrote:
> Tim Daneliuk napisal(a):
>> Ah yes, moral philosophy and python all come together... Er, that is to day:
>>
>> Imagine you have this situation on a *nix filesystem:
>>
>> Symlink A:  /foo -> /usr/home
>> Symlink B:  /bar -> /foo/username
>>
>>
>> If I do this:
>>
>>    import os
>>    print os.path.realpath("/bar")
>>
>> I get this (as one would expect):
>>
>>    /usr/home/username
>>
>> However, what if I want to get back the result in this form:
>>
>>    /foo/username
>>
>>
>> IOW, is there a way to return a symlink-based path which contains
>> the symlink pointer as is was *defined* not as it expands?
>>
> 
> One way (but very ugly):
> print os.path._resolve_link('/bar')
> 

Yup, that does just what I want.  By why, pray tell, do you consider it
ugly ...?


-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From gagsl-py at yahoo.com.ar  Sun Jan 28 18:23:26 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 28 Jan 2007 20:23:26 -0300
Subject: ftplib and retrbinary or retrlines (losing newline
	characters in my log files)
In-Reply-To: <7d1760310701260447u5cbed71fr46cb32f9378bd6ac@mail.gmail.co
 m>
References: <7d1760310701242205u6e6b4706ja20e3c07406a8064@mail.gmail.com>
	<7.0.1.0.0.20070125031353.0452a4f8@yahoo.com.ar>
	<7d1760310701260447u5cbed71fr46cb32f9378bd6ac@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070128201547.04449590@yahoo.com.ar>

At Friday 26/1/2007 09:47, aus stuff wrote:

>Hi, im not sure if this is how i reply to the mail-list, excuse me 
>if incorrect.

Forwarding now to the list.

>Gabriels' solution works fine  > ftp.retrlines('RETR ' + fl, lambda 
>line:fileObj.write('%s\n' % line))
>
>But lambda's confuse me (newbie here) how could i do the same with a 
>normal function?

lambda args: whatever

is the same as:

def anonymous_function(args):
     return whatever

So, the above example could be written as:

def writeline(line):
     fileObj.write('%s\n' % line)
[...]
ftp.retrlines('RETR ' + fl, writeline)

(the write method has no return value, so we omit the return statement)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From tiedon_jano at hotmail.com  Fri Jan  5 15:41:32 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Fri, 05 Jan 2007 20:41:32 GMT
Subject: where is Microsoft Speech Object Library 5.1 option inPythonWin
	2.5?
In-Reply-To: <enm6ip$9b5$1@zam602.zam.kfa-juelich.de>
References: <enln3h$6sc$1@zam602.zam.kfa-juelich.de>
	<mailman.2330.1168015570.32031.python-list@python.org>
	<enm6ip$9b5$1@zam602.zam.kfa-juelich.de>
Message-ID: <0Kynh.432$sE.358@read3.inet.fi>

Siggi kirjoitti:
> Gabriel Genellina wrote:
> 
>> After you download and install version 5.1, it should appear on the list.
> 
> It should, but it does not! Shutting down and starting the WinXP Home system 
> anew did not help.
> The SDK 5.1 installation went smoothly, however. What can I do to find out
> what is wrong?
> 
> siggi
> 


(Sorry for the long post!)


Unfortunately I can't comment on this 5.0/5.1 issue but if you look at page
	http://www.cs.unc.edu/~parente/tech/tr02.shtml
you'll find the pyTTS system. I've used it and everything works.

The funny thing is that the page has a link named "Microsoft SAPI 5.1 
redistributable" which links to
http://www.cs.unc.edu/Research/assist/packages/SAPI5SpeechInstaller.msi
ie. a SAPI 5 installer. So I'm starting to wonder if it matters at all 
whether the speech kit is a version 5 or 5.1.

Anyway: pyTTS works with Python 2.4 as advertized in the accompanying 
examples. I've used it to resolve the following dilemma: how to 
guarantee that I'm aware of new mail appearing on my ISP.

I had an unfortunate experience where a guy I was working with sent me 
(to my home) mail that I didn't expect to receive just at the moment and 
to which I would have liked to react immediately. Why I didn't notice 
the mail coming: I was outside my house pumping more air to my wife's 
bicycle tires! The mail notification was shown and erased and one more 
icon among the more than dozen icons on my Windows System Tray didn't 
account for much.

So I figured out that a voice to remind me would be nice. I have a low 
rate inbox, usually only a maximum of hald a dozen messages per day so I 
wouldn't have to listen the voice all day long. So the voice keeps 
repeating that I have new mail at my ISP until I download the mail and 
otherwise keeps quiet. So here is my program and a skeleton of the INI 
file it uses. The program is not finished (I have a few ideas still) but 
it runs all day long on my computer keeping me happy.

==========================
New Email Notifier.py
==========================
#!/usr/bin/python

'''
     License: MIT License. See License.txt. If that file is not attached,
     the license is http://www.opensource.org/licenses/mit-license.php, 
where
     <year> = 2006 and <copyright holders> = Jussi Salmela, Turku, Finland
'''

# This program checks for new email at ISP and notifies if new email is 
found

import win32serviceutil
import win32service
import win32event
import pyTTS, sys, os, poplib, logging, time
import ConfigParser,pywintypes

print '\nThis is the New Mail Notifier window\n'
notifierDirectory = r'C:\Python\OMAT___PROJEKTIT\New Email Notifier Service'
logging.basicConfig(level=logging.DEBUG,
                     format='%(asctime)s %(levelname)-8s %(message)s',
                     filename=notifierDirectory+r'\error.log')
logging.info('=========================================================')
logging.info('New Email Notifier Service started')
config = ConfigParser.ConfigParser()
config.readfp(open(notifierDirectory+r'\New Email Notifier.INI'))
POP3Server = config.get('POP3','server')
POP3Account = config.get('POP3','account')
POP3Password = config.get('POP3','password')
totalMessagesFormat = config.get('messages','total_message')
newMessagesFormat = config.get('messages','new_message')
wakeupMessageFormat = config.get('messages','wakeup_message')

tts = pyTTS.Create()
#set the speech volume percentage (0-100%)
tts.Volume = 100
#explicitly set a voice
tts.SetVoiceByName(u'MSMary')

uidDict = {}
# We wait to be stopped and check for new email every maxTimeToWait seconds
maxTimeToWait = 1 # First check after 1 second
while True:
     time.sleep(maxTimeToWait)
     maxTimeToWait = 60 # Rest of the checks after 60 second
     try:
         # Connect to the ISP
         a = poplib.POP3(POP3Server,110)
         answer = a.getwelcome()
         if answer[0:3] != '+OK':
             raise ValueError,'a.getwelcome returned: ' + answer
         answer = a.user(POP3Account)
         if answer[0:3] != '+OK':
             raise ValueError,'a.user returned: ' + answer
         if answer[4:] == 'Password required':
             answer = a.pass_(POP3Password)
             if answer[0:3] != '+OK':
                 raise ValueError,'a.pass_ returned: ' + answer
         answer = a.uidl()
         if answer[0][0:3] != '+OK':
             raise ValueError,'a.uidl returned: ' + repr(answer)
         a.quit()
         # Connection closed. Start handling the unique message identifiers
         #logging.info('Connection succesfully opened, used and closed!')
         print 'answer', answer, time.asctime()
         uidList = [e.split()[1] for e in answer[1]]
         print 'uidList', uidList
         totalMessages = len(uidList)
         uidDictNew = {}
         for e in uidList: uidDictNew[e] = True
         uidList = [e for e in uidList if e not in uidDict]
         uidDict = uidDictNew
         if totalMessages:
             tts.Speak(totalMessagesFormat % totalMessages)
         newMessages = len(uidList)
         if newMessages:
             tts.Speak(newMessagesFormat % newMessages)
     except Exception,inst:
         errorMsg = 'Unexpected error: %s' % sys.exc_info()[0]
         logging.error(errorMsg)
         logging.error(inst)
         try:
             tts.Speak(wakeupMessageFormat)
             tts.Speak('I repeat: ' + wakeupMessageFormat)
             tts.Speak(errorMsg)
             tts.Speak(inst)
         except pywintypes.com_error,inst:
             errorMsg = 'Unexpected error: %s' % sys.exc_info()[0]
             logging.error(errorMsg)
             logging.error(inst)

==========================
New Email Notifier.INI
==========================
[POP3]
server: myPOPserver
account: myAcoount
password: myPassword
[messages]
total_message: Your eemail server has. a total of %d messages. for you 
to download
new_message: The number of new messages. since the last check. is %d
wakeup_message: Wake up, Youssi! This is your new eemail notifier, 
reporting the following error!

HTH,
Jussi


From CedricCicada at gmail.com  Fri Jan 19 13:59:14 2007
From: CedricCicada at gmail.com (CedricCicada at gmail.com)
Date: 19 Jan 2007 10:59:14 -0800
Subject: My first try using logger didn't work. Why?
In-Reply-To: <1169224835.820468.316040@v45g2000cwv.googlegroups.com>
References: <1169221734.071338.107190@11g2000cwr.googlegroups.com>
	<1169224835.820468.316040@v45g2000cwv.googlegroups.com>
Message-ID: <1169233154.076956.231540@q2g2000cwa.googlegroups.com>

Beautiful!  Thank you very much!

One of the problems I was laboring under was that I did not know where
to go to find the official documentation.  Thanks for that link too!

Rob



From pythonnews at nospam.jmbc.fr  Tue Jan 30 04:04:38 2007
From: pythonnews at nospam.jmbc.fr (jean-michel bain-cornu)
Date: Tue, 30 Jan 2007 10:04:38 +0100
Subject: wxPython StatusBar Help
In-Reply-To: <45bdfdc3$0$6722$426a74cc@news.free.fr>
References: <45bdfdc3$0$6722$426a74cc@news.free.fr>
Message-ID: <45bf0a45$0$21150$7a628cd7@news.club-internet.fr>

Hi,
> I'm working with wxPython 2.8.1.1.
> 
> Does anybody know how to change the foreground colors in a wx.StatusBar
You can get inspiration from the following code, but the problem is you 
will have also to draw all the status bar stuff, not only the foreground 
color.
I don't know any other way. However, I'm used to 2.6 and I could miss 
something existing in 2.8 (I think to OnCreateStatusBar which exists and 
don't work in 2.6 and was supposed to work with the next release ; it 
could be a clue).
Regards,
jm


import wx
class MyStatusBar(wx.StatusBar):
     def __init__(self,*args,**kargs):
         wx.StatusBar.__init__(self,*args,**kargs)
         self.Bind(wx.EVT_PAINT,self.OnPaint)
     def OnPaint(self,event):
         dc = wx.PaintDC(self)
         self.Draw(dc)
     def Draw(self,dc):
         dc.BeginDrawing()
         dc.SetBackground( wx.Brush("White") )
         dc.Clear()
         dc.SetPen(wx.Pen('BLACK'))
         dc.DrawText(self.GetStatusText(),0,0)
         dc.EndDrawing()
if __name__ == "__main__":
     app = wx.PySimpleApp()
     frame= wx.Frame(None,wx.ID_ANY,'test frame')
     statusBar= MyStatusBar(frame,wx.ID_ANY)
     statusBar.SetStatusText("status text..")
     frame.SetStatusBar(statusBar)
     frame.Show(True)
     app.MainLoop()


From justin.mailinglists at gmail.com  Mon Jan 29 21:50:15 2007
From: justin.mailinglists at gmail.com (Justin Ezequiel)
Date: 29 Jan 2007 18:50:15 -0800
Subject: Convert raw data to XML
In-Reply-To: <1170124927.718200.225080@m58g2000cwm.googlegroups.com>
References: <1170124927.718200.225080@m58g2000cwm.googlegroups.com>
Message-ID: <1170125415.883023.316950@s48g2000cws.googlegroups.com>

On Jan 30, 10:42 am, elrondru... at gmail.com wrote:
> For example the raw data is as follows
>
> <?xml version="1.0" ?><Blah><ABC><Id id="1"/><Description>SomeText </
> Description><Result>PassorFail</Result></ABC></Blah>
>
> without spaces or new lines. I need this to be written into an XML
> file as
>
> <?xml version="1.0" ?>
> <Blah>
>        <ABC>
>               <Id id="1"/>
>               <Description>
>                          SomeText
>               </Description>
>               <Result>
>                          PassorFail
>               </Result>
>       </ABC>
> </Blah>
>

raw = r'<?xml version="1.0" ?><Blah><ABC><Id id="1"/
><Description>SomeText </Description><Result>PassorFail</Result></
ABC></Blah>'
import xml.dom.ext
import xml.dom.minidom
doc = xml.dom.minidom.parseString(raw)
xml.dom.ext.PrettyPrint(doc)
<?xml version='1.0' encoding='UTF-8'?>
<Blah>
  <ABC>
    <Id id='1'/>
    <Description>SomeText </Description>
    <Result>PassorFail</Result>
  </ABC>
</Blah>




From dwoogle at gmail.com  Wed Jan  3 13:48:47 2007
From: dwoogle at gmail.com (dwelden)
Date: 3 Jan 2007 10:48:47 -0800
Subject: Sorting on multiple values, some ascending, some descending
Message-ID: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>

I have successfully used the sort lambda construct described in
http://mail.python.org/pipermail/python-list/2006-April/377443.html.
However, how do I take it one step further such that some values can be
sorted ascending and others descending? Easy enough if the sort values
are numeric (just negate the value), but what about text?

Is the only option to define an external sorting function to loop
through the list and perform the comparisons one value at a time?



From jim at none  Mon Jan 29 23:44:41 2007
From: jim at none (Jim)
Date: Mon, 29 Jan 2007 21:44:41 -0700
Subject: Python 2.5 Tkinter not configured
Message-ID: <epmi580m8c@enews4.newsguy.com>

I compiled Python 2.5 from python.org and I get an error message when I try
to import the Tkinter module. Python reports that there is no such module.
It says my Python isn't configured for Tkinter. How do I configure it? I'm
using GCC 4.1.1 to compile the tarball. Thanks for any help with this.

Jim


From http  Tue Jan 23 17:37:18 2007
From: http (Paul Rubin)
Date: 23 Jan 2007 14:37:18 -0800
Subject: My python programs need a GUI, wxPython or PyQt4?
References: <ep60jp$63v$1@aioe.org>
Message-ID: <7xac09cqu9.fsf@ruckus.brouhaha.com>

"Daniel Jonsson" <not at set.se> writes:
> So, I've reached the point where my building pipeline tools actually 
> needs to be used by other people in my company. By this reason I 
> actually need to think about the usability, and I've come to the 
> conclusion that I need a GUI. So, which of the two packages should I 
> learn, and which one is easier to pick up? 
> Thanks in advance!

I've always found tkinter to be adequate so far.  The widgets look a
little bit crude compared with other toolkits, and there's less fancy
functionality, but it's fairly easy to program and it's included with
Python.  For internal use where you don't need a lot of visual
slickness to sell the product, it may be ok.

Another possibility is embed a web server in your application and use
a browser interface for your gui.  That makes it easy to run the
application on a separate machine from the user, among other things,
even if you don't try to support multiple simultaneous users like a
real web server normally would have to.


From steve at REMOVE.THIS.cybersource.com.au  Thu Jan 11 15:10:02 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 12 Jan 2007 07:10:02 +1100
Subject: dot operations
References: <1168511200.252193.132340@p59g2000hsd.googlegroups.com>
	<1168522658.128216.199310@77g2000hsv.googlegroups.com>
	<1168524399.307074.192080@i56g2000hsf.googlegroups.com>
Message-ID: <pan.2007.01.11.20.10.01.960111@REMOVE.THIS.cybersource.com.au>

On Thu, 11 Jan 2007 06:06:39 -0800, jm.suresh at no.spam.gmail.com wrote:

>> jm.suresh at no.spam.gmail.com wrote:
>> > Hi,
>> >  Frequently I get to do like this:
>> > a = (1, 2, 3, 4) # some dummy values
>> > b = (4, 3, 2, 1)
>> > import operator
>> > c = map(operator.add, a, b)
>> >
>> > I am finding the last line not very readable especially when I combine
>> > couple of such operations into one line. Is it possible to overload
>> > operators, so that, I can use .+ for element wise addition, as,
>> > c = a .+ b
>> > which is much more readable.

[snip]

> I just found this from :
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/384122
> 
> class Infix(object):

[snip code]

> c = a |dotplus| b


Personally, I find that to be the least readable of all the alternatives.
It is also slow, so slow that using it is (in my opinion) a pessimation
rather than an optimization.

Let me make the usual warnings about premature optimization being
the root of all evil, blah blah blah. Readability counts, and nobody cares
if you shave one hundredth of a millisecond off some code that your
program runs once. But, having said that, map is *fast*, especially with
the functions from operator.

>>> import timeit
>>> timeit.Timer("map(operator.add, a, b)", 
... "import operator; a = (1, 2, 3, 4); b = (4, 3, 2, 1)").timeit()
4.0072550773620605

It is even faster if you get rid of the dot lookup:

>>> timeit.Timer("map(add, a, b)", "from operator import add; "
... "a = (1, 2, 3, 4); b = (4, 3, 2, 1)").timeit()
3.6557090282440186

Using lambda can be much slower:

>>> timeit.Timer("map(lambda x,y: x+y, a, b)", 
... "a = (1, 2, 3, 4); b = (4, 3, 2, 1)").timeit()
6.1221940517425537

A list comprehension is in the middle, speed-wise:

>>> timeit.Timer("[x+y for x,y in zip(a,b)]", 
... "a = (1, 2, 3, 4); b = (4, 3, 2, 1)").timeit()
5.0318419933319092

But the Infix recipe is slower than a wet week:

>>> timeit.Timer("a|dotplus|b", 
... "a = (1, 2, 3, 4); b = (4, 3, 2, 1); " 
... "from __main__ import dotplus").timeit()
15.195909976959229


Speaking for myself, I find list comprehensions to be the most readable of
the alternatives and the most Pythonic. 



-- 
Steven.



From sturlamolden at yahoo.no  Sun Jan  7 12:16:09 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 7 Jan 2007 09:16:09 -0800
Subject: c# application calling Scipy
In-Reply-To: <1168108637.270801.155950@42g2000cwt.googlegroups.com>
References: <1168108637.270801.155950@42g2000cwt.googlegroups.com>
Message-ID: <1168190167.079723.25160@51g2000cwl.googlegroups.com>


dongarbage at hotmail.com wrote:
> Hi,
>
> Novice here. :)
>
> I'm building a c# application and I want to call functions in SciPy
> from that application.
>
> What's the best way to call SciPy methods from a C# program?

You need to:

1. Embed a Python interpreter in your C# app. That is, importing from a
DLL with a Python interpreter and defining a few structs.

2. Define a NumPy ndarray as a C# struct.

Or:

1. Write a proxy DLL in C and embed Python in that. This is the
preferred way, as I see it. You are relieved of having to redefine
Python and NumPy's C structs in C#.

2. Import your proxy in C# and marshal a C# array to a IntPtr. That
will allow you to map a C# array to a NumPy ndarray C struct in your
proxy.

The latter method is less hassle.

In any case you also need to make sure you are using a .NET runtime
that are linked to the same CRT as Python (.NET 1.1 should work).

Using IronPython will not work, as neither NumPy nor SciPy is ported to
IronPython (and porting is not trivial either; but if you take the task
upon yourself, many will be happy if you succeeed.)



From skip at pobox.com  Sun Jan 14 23:08:08 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 14 Jan 2007 22:08:08 -0600
Subject: How naive is Python?
In-Reply-To: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>
References: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>
Message-ID: <17834.65064.411286.935369@montanaro.dyndns.org>


    John> How naive (in the sense that compiler people use the term) is the
    John> current Python system?  For example:

    John>       def foo() :
    John>           s = "This is a test"
    John>           return(s)

    John>          s2 = foo()

    John> How many times does the string get copied?

Never.  s and s2 just refer to the same object (strings are immutable).
Executing this:

    def foo() :
        print id("This is a test")
        s = "This is a test"
        print id(s)
        return(s)

    s2 = foo()
    print id(s2)

prints the same value three times.

    John> Or, for example:

    John>       s1 = "Test1"
    John>       s2 = "Test2"
    John>       s3 = "Test3"
    John>       s = s1 + s2 + s3

    John> Any redundant copies performed, or is that case optimized?

Not optimized.  You can see that using the dis module:

  4           0 LOAD_CONST               1 ('Test1')
              3 STORE_FAST               0 (s1)

  5           6 LOAD_CONST               2 ('Test2')
              9 STORE_FAST               1 (s2)

  6          12 LOAD_CONST               3 ('Test3')
             15 STORE_FAST               2 (s3)

  7          18 LOAD_FAST                0 (s1)
             21 LOAD_FAST                1 (s2)
             24 BINARY_ADD          
             25 LOAD_FAST                2 (s3)
             28 BINARY_ADD          
             29 STORE_FAST               3 (s)
             32 LOAD_CONST               0 (None)
             35 RETURN_VALUE        

The BINARY_ADD opcode creates a new string.

    John> How about this?

    John>       kcount = 1000
    John>       s = ''
    John>       for i in range(kcount) :
    John>           s += str(i) + ' '

    John> Is this O(N) or O(N^2) because of recopying of "s"?

O(N).  Here's a demonstration of that:

    #!/usr/bin/env python

    from __future__ import division

    def foo(kcount):
        s = ''
        for i in xrange(kcount) :
            s += str(i) + ' '

    import time

    for i in xrange(5,25):
        t = time.time()
        foo(2**i)
        t = time.time() - t
        print 2**i, t, t/2**i

On my laptop t roughly doubles for each iteration and prints around 5e-06
for t/2**i in all cases.

Skip



From basti.wiesner at gmx.net  Wed Jan  3 06:59:27 2007
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Wed, 03 Jan 2007 12:59:27 +0100
Subject: How do I add users using Python scripts on a Linux machine
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
	<ene0j1$6nk$03$1@news.t-online.com>
	<m2fyatcddg.fsf@ordesa.cs.uu.nl>
Message-ID: <eng5qv$6l4$00$1@news.t-online.com>

Piet van Oostrum <piet at cs.uu.nl> typed

>>>>>> Sebastian 'lunar' Wiesner <basti.wiesner at gmx.net> (SW) wrote:
> 
>>SW> Linux seems to ignore SUID bit on scripts:
> 
> The reason is that obeying SUID bits on scripts would be a security
> risk.

I don't see a problem with SUID on scripts. If you restrict write access
to the owner, modification is hardly possible. 
However, if you allow world-wide write access to your binaries and
scripts, both can easily be modified...

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From jarausch at skynet.be  Tue Jan  2 06:48:56 2007
From: jarausch at skynet.be (Helmut Jarausch)
Date: Tue, 02 Jan 2007 12:48:56 +0100
Subject: mutable numeric type
In-Reply-To: <1167735454.604184.110630@i12g2000cwa.googlegroups.com>
References: <mailman.2193.1167708425.32031.python-list@python.org>
	<1167735454.604184.110630@i12g2000cwa.googlegroups.com>
Message-ID: <459A46A8.3050706@skynet.be>

pgarrone at acay.com.au wrote:
> Way to go.
> Try doing this.
> x = MutableNumeric(42)
       ^^^^^^^^^^^^^^
where is this defined?

> y = x
> x += 42
> print y
> 


-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From tim at tdw.net  Tue Jan 16 11:50:50 2007
From: tim at tdw.net (Tim Williams)
Date: Tue, 16 Jan 2007 16:50:50 +0000
Subject: Python web app. (advice sought)
In-Reply-To: <B63018983.226.7431.1@mxextra>
References: <45aae51b.0@entanet> <R62949312.665.5091.1@mxextra>
	<mailman.2730.1168853555.32031.python-list@python.org>
	<B63018983.226.7431.1@mxextra>
Message-ID: <9afea2ac0701160850m6bb1badcw318bb738536cf49@mail.gmail.com>

On 16/01/07, Ralf Sch?nian <ralf at schoenian-online.de> wrote:

>
> I would also like to vote for Karrigell.
>
> BTW: Does anyone knows how to avoid stopping/starting of the webserver
> after changing external libraries? I have some own modules under
> /opt/local/python/lib and import them by extending the path with
> sys.path.append() After changing any file here, I have to restart
> Karrigell.
>

Ralf,  you should ask this on the Karrigell list  :)


From farproc at gmail.com  Tue Jan  9 23:59:54 2007
From: farproc at gmail.com (Kevin Yuan)
Date: Wed, 10 Jan 2007 12:59:54 +0800
Subject: where is python on linux?
In-Reply-To: <enqe0c$ahv$1@news.lrz-muenchen.de>
References: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
	<enqe0c$ahv$1@news.lrz-muenchen.de>
Message-ID: <45A472CA.7020600@gmail.com>

Frank Potter wrote:
>> ... where is the executable python file? ...
>>     
>
> does
>
> whereis python
"whereis" is cool!


From persed at princeton.edu  Mon Jan 22 08:51:19 2007
From: persed at princeton.edu (Per B. Sederberg)
Date: Mon, 22 Jan 2007 08:51:19 -0500
Subject: Program eating memory, but only on one machine?
Message-ID: <6b7179780701220551v7765c05apd73052112ff06ded@mail.gmail.com>

Hi Everybody:

I'm having a difficult time figuring out a a memory use problem.  I
have a python program that makes use of numpy and also calls a small C
module I wrote because part of the simulation needed to loop and I got
a massive speedup by putting that loop in C.  I'm basically
manipulating a bunch of matrices, so nothing too fancy.

That aside, when the simulation runs, it typically uses a relatively
small amount of memory (about 1.5% of my 4GB of RAM on my linux
desktop) and this never increases.  It can run for days without
increasing beyond this, running many many parameter set iterations.
This is what happens both on my Ubuntu Linux machine with the
following Python specs:

Python 2.4.4c1 (#2, Oct 11 2006, 20:00:03)
[GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
>>> numpy.version.version
'1.0rc1'

and also on my Apple MacBook with the following Python specs:

Python 2.4.3 (#1, Apr  7 2006, 10:54:33)
[GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
>>> numpy.version.version
'1.0.1.dev3435'
>>>


Well, that is the case on two of my test machines, but not on the one
machine that I really wish would work, my lab's cluster, which would
give me 20-fold increase in the number of processes I could run.  On
that machine, each process is using 2GB of RAM after about 1 hour (and
the cluster MOM eventually kills them).  I can watch the process eat
RAM at each iteration and never relinquish it.  Here's the Python spec
of the cluster:

Python 2.4.4 (#1, Jan 21 2007, 12:09:48)
[GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-49)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
>>> numpy.version.version
'1.0.1'

It also showed the same issue with the April 2006 2.4.3 release of python.

I have tried using the gc module to force garbage collection after
each iteration, but no change.  I've done many newsgroup/google
searches looking for known issues, but none found.  The only major
difference I can see is that our cluster is stuck on a really old
version of gcc with the RedHat Enterprise that's on there, but I found
no suggestions of memory issues online.

So, does anyone have any suggestions for how I can debug this problem?
 If my program ate up memory on all machines, then I would know where
to start and would blame some horrible programming on my end.  This
just seems like a less straightforward problem.

Thanks for any help,
Per


From sean at datafly.net  Sun Jan 21 19:03:55 2007
From: sean at datafly.net (Sean Schertell)
Date: Mon, 22 Jan 2007 09:03:55 +0900
Subject: PyMeld for html templates?
In-Reply-To: <ao34r29qachrjkdm1hnb8t29mhjgvmva3v@4ax.com>
References: <mailman.2858.1169084154.32031.python-list@python.org>
	<1169241497.610167.130580@a75g2000cwd.googlegroups.com>
	<2EA54772-B695-435B-950C-3A15DE8B7135@datafly.net>
	<ao34r29qachrjkdm1hnb8t29mhjgvmva3v@4ax.com>
Message-ID: <42641607-532B-40FB-8C15-518CB21EA1C2@datafly.net>

Thanks Richie! That's exactly the reply I was hoping for.

Hooray!

Sean



On Jan 20, 2007, at 9:50 PM, Richie Hindle wrote:

> Hi Sean,
>
>> Thanks Richie -- but actually, what I had in mind was slightly
>> different. I want for my CONTENT pages to only contain the content.
>> So to modify your example:
>>
>> LAYOUT = """<html><head><title id='title'>The Title</title></head>
>> <body><div id='info'>The page information goes here.</div>
>> <p id='footer>Copyright Me 2007.</p></body></html>"""
>>
>> INFO = """<div id='info'><p>Here is the info, which would in the real
>> world
>> be read from a file.</p></div>"""
>>
>> Can I do this just as easily?
>
> Yes, of course, just the same way:
>
> from PyMeld import Meld
>
> LAYOUT = """<html><head><title id='title'>The Title</title></head>
> <body><div id='info'>The page information goes here.</div>
> <p id='footer>Copyright Me 2007.</p></body></html>"""
>
> INFO = """<div id='info'><p>Here is the info, which would in the real
> world be read from a file.</p></div>"""
>
> page = Meld(LAYOUT)
> info = Meld(INFO)
> page.info = info.info._content
> print page
>
> There's nothing that says a Meld has to be a complete HTML document.
>
>> One other unrelated question... Let's say I have a table with a
>> template row with id="myRow". I want to use PyMeld to clone that row
>> n number of times (depending on database results). So here's my
>> stoopid question: Does that mean that my XHTML will contain n rows
>> all with the same id="myRow" thereby making my XHTML invalid?
>
> Yes, it does, but you can simply delete the 'id' attributes from  
> the rows,
> with `del row.id`, before adding them back into the document.
>
> -- 
> Richie Hindle
> richie at entrian.com




From pretoriano_2001 at hotmail.com  Mon Jan  8 08:29:58 2007
From: pretoriano_2001 at hotmail.com (vizcayno)
Date: 8 Jan 2007 05:29:58 -0800
Subject: Recommendations (or best practices) to define functions (or
	methods)
In-Reply-To: <50ehtmF1fh46iU1@mid.uni-berlin.de>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
	<50ehtmF1fh46iU1@mid.uni-berlin.de>
Message-ID: <1168262998.765702.38760@i15g2000cwa.googlegroups.com>


Diez B. Roggisch ha escrito:

> vizcayno schrieb:
> > Hello:
> > Need your help in the "correct" definition of the next function. If
> > necessary, I would like to know about a web site or documentation that
> > tells me about best practices in defining functions, especially for
> > those that consider the error exceptions management.
> > I have the next alternatives but I think there are better:
>
> <snip/>
>
> IMHO none of them is good. Python has exceptions. Use them. There is no
> need to awkwardly communicate error conditions using return-values. Use
> return values to return values. Use exceptions in case of errors.
>
> Diez

Diez, in that case I woul prefer not to use exceptions and wait for
Python to abort itself and wait to see the message it issues.



From baur79 at gmail.com  Tue Jan  2 12:06:31 2007
From: baur79 at gmail.com (baur79)
Date: 2 Jan 2007 09:06:31 -0800
Subject: how to use execfile with argument under windows
Message-ID: <1167757591.465076.314700@h40g2000cwb.googlegroups.com>

Hi everybody

i need to execute this command line (different source for n times)

filename.exe -type png -source sourcearg -file filename.png


i try with python (python script and filename.exe in same directory)

import os
......
......
execfile("filename.exe -type png -source sourcearg -file filename.png")

error output
IOError: [Errno 2] No such file or directory:"filename.exe -type png
-source sourcearg -file filename.png"

try
execfile("d:\pathto\filename.exe -type png -source sourcearg -file
filename.png")

error output
IOError: [Errno 2] No such file or directory:"d:\pathto\filename.exe
filename.exe -type png -source sourcearg -file filename.png"


please help to solve problem
thanks



From weekender_ny at yahoo.com  Mon Jan 22 03:30:20 2007
From: weekender_ny at yahoo.com (John)
Date: 22 Jan 2007 00:30:20 -0800
Subject: class explorer for automating IE
In-Reply-To: <ep1pss$97i$02$1@news.t-online.com>
References: <1169448532.869501.190530@v45g2000cwv.googlegroups.com>
	<1169449585.832667.325370@11g2000cwr.googlegroups.com>
	<ep1pss$97i$02$1@news.t-online.com>
Message-ID: <1169454620.313191.263020@m58g2000cwm.googlegroups.com>


The problem is that this does not run javascript code it seems.
I got started with pamie, which seems to work till now.

Thanks,
--j

On Jan 22, 2:42 am, Peter Otten <__pete... at web.de> wrote:
> John wrote:
> > Is there an analogue of IE Mechanize in python?http://www.google.com/search?q=python%20mechanize&btnI=I%27m+Feeling+...



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Jan 10 12:50:49 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 10 Jan 2007 18:50:49 +0100
Subject: Question about compiling.
References: <mailman.2519.1168419653.32031.python-list@python.org>
Message-ID: <50knbpF1g9rt9U1@mid.individual.net>

Steven W. Orr wrote:

> I *just* read the tutorial so please be gentle. I created a file
> called fib.py which works very nicely thank you. When I run it it
> does what it's supposed to do but I do not get a resulting .pyc
> file. 

.pyc files are created only if you import a .py file.

Regards,


Bj?rn

-- 
BOFH excuse #77:

Typo in the code



From nagle at animats.com  Thu Jan 25 01:12:07 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 25 Jan 2007 06:12:07 GMT
Subject: Catching floating point errors from linked C code
In-Reply-To: <1169702669.027065.65990@v33g2000cwv.googlegroups.com>
References: <1169696243.262973.188540@s48g2000cws.googlegroups.com>
	<PzWth.22651$yC5.11156@newssvr27.news.prodigy.net>
	<1169702669.027065.65990@v33g2000cwv.googlegroups.com>
Message-ID: <XSXth.26940$sR.20213@newssvr29.news.prodigy.net>

John Pye wrote:
> Hi John,
> 
> On Jan 25, 3:43 pm, John Nagle <n... at animats.com> wrote:
> 
>>Python is probably running with floating point exceptions disabled,
>>but you can enable them in your C code, and restoring the floating
>>point mode when you leave, if you want.  This is probably
>>only worth doing under a debugger, because otherwise you just end
>>up with an aborted instance of Python.
> 
> 
> So as far as you know, Python doesn't switch stuff like
> feenableexcept(FE_EXCEPT_ALL)? Does Python use the <signal.h>
> internally, or are all its FPEs detected by explicit checks beforehand?

    I have no idea what state Python leaves the FPU in, but whatever
the state is, you can read it, set your own state, and restore
the previous state before returning to Python.

    The last time I had to do this, I used

	unsigned int oldstate = 	// make almost all FPU errors fatal
		_controlfp ((~_EM_INVALID) & _CW_DEFAULT, _MCW_EM);
	...
	_controlfp(oldstate);		// restore old state

on Windows 2000.


					John Nagle


From jairodsl at gmail.com  Thu Jan 11 20:22:52 2007
From: jairodsl at gmail.com (jairodsl)
Date: 11 Jan 2007 17:22:52 -0800
Subject: Parallel Python
In-Reply-To: <1168561780.317156.268880@42g2000cwt.googlegroups.com>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<7x8xga215f.fsf@ruckus.brouhaha.com>
	<eo3bjj$cen$1@gemini.csx.cam.ac.uk>
	<eo52h9$kad$1@news.albasani.net>
	<1168516936.890690.235300@p59g2000hsd.googlegroups.com>
	<eo5gtj$6bs$1@news.albasani.net>
	<1168561780.317156.268880@42g2000cwt.googlegroups.com>
Message-ID: <1168564971.999278.135120@a75g2000cwd.googlegroups.com>

Hi,

You guys forgot pyMPI, http://pympi.sourceforge.net/  It works fine !!!
A little hard installation and configuration but finally works !!!

Cordially,

Jairo Serrano
Bucaramanga, Colombia

parallelpyt... at gmail.com wrote:
> >
> > Thus there are different levels of parallelization:
> >
> > 1 file/database based; multiple batch jobs
> > 2 Message Passing, IPC, RPC, ...
> > 3 Object Sharing
> > 4 Sharing of global data space (Threads)
> > 5 Local parallelism / Vector computing, MMX, 3DNow,...
> >
> > There are good reasons for all of these levels.
> > Yet "parallel python" to me fakes to be on level 3 or 4 (or even 5 :-) ), while its just a level 2
> > system, where "passing", "remote", "inter-process" ... are the right vocables.
> In one of the previous posts I've mentioned that ppsmp is based on
> processes + IPC, which makes it a system with level 2 parallelization,
> the same level where MPI is.
> Also it's obvious from the fact that it's written completely in python,
> as python objects cannot be shared due to GIL (POSH can do sharing
> because it's an extension written in C).



From matej.cepl at gmail.com  Tue Jan  9 18:57:50 2007
From: matej.cepl at gmail.com (matej)
Date: 9 Jan 2007 15:57:50 -0800
Subject: maildir->mbox conversion script review
Message-ID: <1168387070.443728.287210@p59g2000hsd.googlegroups.com>

Hi,

I am writing a script to convert couple of thousand emails (in couple
of hundred folders) and before I will get to the hard part -- maintaing
structure folders and subfolders, and maintaing record of the status of
the message, I would like to be sure that I have at least maildir->mbox
conversion right. Could anybody comment on the below shown code please?
Thanks a lot

Mat?j

---------------------------------------------------------------------------------------------------------------------
#!/usr/bin/env python
"""mdir2mbx: yet another maildir -> mbox converter

  mdir2mbx [maildirName] [mboxName]

  TODO:
      * convert all (or as many as possible) status flags from KMail
        to Thunderbird.
      * testing, testing, testing
"""
__version__ = "$Revision: 1.2 $"
__author__ = "Matej Cepl <mcepl at redhat.com>"
__copyright__ = "(C) 2007 Matej Cepl. MIT/X11."
__date__ = "$Date: 2007/01/08 23:56:29 $"
___contributors__ = []

import email, email.Errors, email.Header, email.Generator, mailbox
import codecs, sys, cStringIO

class Mailbox(mailbox.UnixMailbox):
   def __init__(self,filename):

mailbox.UnixMailbox.__init__(self,filename,email.message_from_file)
      self.boxname=filename
      self.content = ""

   def add(self,msg):
      fp = cStringIO.StringIO()
      g = email.Generator.Generator(fp, mangle_from_=True,
maxheaderlen=65)
      g.flatten(msg,unixfrom=True)
      self.content += "%s\n\n" % fp.getvalue()

   def write(self):
      outfile=file(self.boxname,"wb")
      outfile.write("%s\n" % self.content)
      outfile.close()

class MyMaildir(mailbox.Maildir):
   def __init__(self,dirname):
      mailbox.Maildir.__init__(self,dirname,email.message_from_file)
      self.dirname = dirname
      self.decfunc = email.Header.decode_header
      self.msg = ""

   def __translateHeader(self,headerName):
      header = email.Header.decode_header(self.msg[headerName])
      string = header[0][0]
      encoding = header[0][1]
      if not(encoding):
         encoding = "ascii"
      outstr = string.decode(encoding,'ignore')
      return outstr

   def listHeaders(self):
      for self.msg in self:
         hdrfrom = self.__translateHeader("From")
         #hdrto = self.__translateHeader("To")
         hdrdate = self.__translateHeader("Date")
         hdrsubject = self.__translateHeader("Subject")
         print "%s;%s;%s" % (hdrfrom,hdrdate,hdrsubject)
         #header =
email.Header.decode_header(self.msg["Message-Id"])[0][0]
         #print "%s;%s" % (self.dirname,header)

   def writeMBox(self,filename):
      mbox = Mailbox(filename)
      for self.msg in self:
         mbox.add(self.msg)
      mbox.write()

if __name__=="__main__":
   obj = MyMaildir(sys.argv[1])
   obj.writeMBox(sys.argv[2])



From horpner at yahoo.com  Sat Jan 27 02:18:21 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 27 Jan 2007 07:18:21 GMT
Subject: Convert String to list of chars
References: <mailman.3226.1169882063.32031.python-list@python.org>
Message-ID: <11Duh.1840$G23.1501@newsreading01.news.tds.net>

On 2007-01-27, juanefren at gmail.com <juanefren at gmail.com> wrote:
> How can I convert a string to a char list?
> for example
>
> "hello" --> ['h','e','l','l','o']
>
> I have been searching but I can't find my answers

list("hello")


From jeff.dyke at gmail.com  Thu Jan  4 10:03:48 2007
From: jeff.dyke at gmail.com (jeff.dyke at gmail.com)
Date: 4 Jan 2007 07:03:48 -0800
Subject: connection hangs
Message-ID: <1167923027.937816.12880@q40g2000cwq.googlegroups.com>

I am using ftplib in some code that does exactly what you would expect.
 It ftp's files.  Its running inside a service running on windows xp
and windows 2003 servers, approximately 20 installations each
installation sends between 100 and 1000 files per day. Occasionally the
process will hang completely and the only way to restart the service is
to kill the pythonservice.exe (via End Process in Task Manager) service
and start it.

I have turned on the full debugging, ftpobject.debug(1), and redirected
that stdout to a file and when the process hangs i see hundreds of
identical lines (*cmd* 'TYPE I') in the debug files.  See log except
below.  This command i see is only executed in two places, during the
storbinary and retrbinary methods.   When it hangs, it never gets a
response from the server and eventually locks up.

The connection does have a socket timeout of 10 seconds on the
connection, modifying the length of time has no affect on this issue.
Everything will work fine for weeks/months and then all of a sudden a
network issue will occur and the process will hang.  The process ONLY
hangs when transferring over the internet, it has never happened on a
LAN connection, even when i have removed all connectivity from the FTP
server mid upload.

Has anyone ever seen this?  or have any ideas how i could code around
it.


Thanks
Jeff

--- debug log ----
*resp* '227 Entering Passive Mode  (##.##.##.##,173,244).'
*cmd* 'NLST *filematch*.xml'
*resp* '125 Data connection already open; Transfer starting.'
*resp* '226 Transfer complete.'
*cmd* 'USER username'
*resp* '331 Password required for username.'
*cmd* 'PASS ********'
*resp* '230 User username logged in.'
*cmd* 'TYPE I'
*resp* '200 Type set to I.'
*cmd* 'PASV'
*resp* '227 Entering Passive Mode (##.##.##.##,174,4).'
*cmd* u'STOR /path/to/filename.ext'
*resp* '125 Data connection already open; Transfer starting.'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
*cmd* 'TYPE I'
 .... you get the idea



From Thomas.Ploch at gmx.net  Wed Jan  3 18:02:40 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Thu, 04 Jan 2007 00:02:40 +0100
Subject: static object
In-Reply-To: <459c306c$0$314$426a74cc@news.free.fr>
References: <459c306c$0$314$426a74cc@news.free.fr>
Message-ID: <459C3610.7020703@gmx.net>

meelab schrieb:
> Dear All,
> 
> I am looking for a way to create a "static object" or a "static class" -
> terms might be inappropriate - having for instance:
> 
> class StaticClass:
>     .
>     .
> 
> and then
> staticObject1 = StaticClass()
> staticObject2 = StaticClass()
> 
> so that staticObject1 and staticObject2 refers exactly to the same
> instance of object.
> 
> In other words, that is a class which would result in only 1 instance
> always the same no matter how many times I will "instantiate" it.
> 
> My purpose is to permit this class to initialize a massive amount of
> data that I need to access from different points of my program without
> duplicating this data in memory and without loosing time in reloading it
>  each time I need it.
> 
> I noticed the staticmethods, and the __new__ method which could , but I
> always get stuck in actually creating static DATA without having global
> data.
> 
> Does anyone have a start of a clue to this ?
> 
> Many thanks in advance
> 
> Emmanuel.

class DataStorage:
	def __init__(self, data):
		self.data = data

dataVault = DataStorage(data)
dataVault1 = dataVault
dataVault2 = dataVault
...


but why not use a static_data.py (put your data in there) file and do:

 >>> from static_data.py import DATA

This way you only load it once and it will be accessible throughout your
program.

Thomas


From fsck_spam at telenet.be  Thu Jan 18 17:19:15 2007
From: fsck_spam at telenet.be (Rikishi 42)
Date: Thu, 18 Jan 2007 23:19:15 +0100
Subject: Making a simple script standalone
References: <5d1084-5j7.ln1@whisper.very.softly>	<mailman.2820.1169032834.32031.python-list@python.org>	<ek8284-od9.ln1@whisper.very.softly>
	<mailman.2856.1169075613.32031.python-list@python.org>
	<eondm3$ouo$1@news.albasani.net>
Message-ID: <3c8584-6mc.ln1@whisper.very.softly>

On Thursday 18 January 2007 10:13, robert wrote:
> stay with py23 for "a script" (and more) and make <700kB
> independent distros - UPX and 7zip involved:
> 
> http://groups.google.com/group/comp.lang.python/msg/edf469a1b3dc3802

Thanks, that might be an option. But I might just convince the person to
let me install Python.  :-(

-- 
Research is what I'm doing, when I don't know what I'm doing.
(von Braun)



From facundo at taniquetil.com.ar  Fri Jan 12 10:46:32 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Fri, 12 Jan 2007 15:46:32 +0000 (UTC)
Subject: ValueError from dict - some detail would be helpful
References: <1168529175.794131.109390@77g2000hsv.googlegroups.com>
Message-ID: <eo8agn$5au$1@sea.gmane.org>

metaperl wrote:

>   File "/sw/lib/python2.5/csv.py", line 120, in _dict_to_list
>     raise ValueError, "dict contains fields not in fieldnames"
>
>
> --- it would be nice if it said what field it was

Yeap, nice and useful... but, for example, what'd happen if the fields
that are not in fieldnames are 10, or 100? How the message could be?

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From S.Mientki-nospam at mailbox.kun.nl  Tue Jan  2 06:50:57 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Tue, 02 Jan 2007 12:50:57 +0100
Subject: Difference between __init__ (again) and nothing ...
In-Reply-To: <pan.2007.01.02.11.03.56.332520@gmx.net>
References: <da749$459a380d$d443bb3a$16845@news.speedlinq.nl>
	<pan.2007.01.02.11.03.56.332520@gmx.net>
Message-ID: <c16d7$459a4712$d443bb3a$23982@news.speedlinq.nl>

Marc 'BlackJack' Rintsch wrote:
> In <da749$459a380d$d443bb3a$16845 at news.speedlinq.nl>, Stef Mientki wrote:
> 
>> What's the difference between using __init__ and using nothing,
>> as the examples below.
>>
>> class cpu:
>>    PC = 4
> 
> This is a *class attribute*.  It's the same for all instances of `cpu`.
> 
>> class cpu:
>>    def __init__:
>>      self.PC = 4
> 
> This is an *instance attribute* which is set in every instance of `cpu`.
>
thanks Marc,

Oh so obvious, why didn't I discovered that myself ;-)

cheers,
Stef


From pavlovevidence at gmail.com  Tue Jan 23 23:25:42 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 23 Jan 2007 20:25:42 -0800
Subject: free variables /cell objects question
In-Reply-To: <1169563580.634000.122540@v45g2000cwv.googlegroups.com>
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com>
	<Xns98C17C03B6297duncanbooth@127.0.0.1>
	<1169563580.634000.122540@v45g2000cwv.googlegroups.com>
Message-ID: <1169612742.833333.239870@d71g2000cwa.googlegroups.com>

On Jan 23, 9:46 am, "gangesmaster" <tomerfil... at gmail.com> wrote:
> ugliness :)
>
> so this is why [lambda: i for i in range(10)] will always return 9.
> imho that's a bug, not a feature.

It's a feature.

If you were to write a nested function like this, where a, b, c, and d,
are cell variables:

print_values():
    print a,b,c,d

then it wouldn't work as intended if you passed the variable itself to
the cell rather than a reference.  Nested functions have to support
this as well as to create lexical closures.

The thing is, newbies are very likely to use nested functions like I've
shown above, whereas few newbies are likely to use closures.  Python
has correctly, IMHO, chosen the way that minimizes surprises for
newbies.


Carl Banks



From xah at xahlee.org  Mon Jan 22 00:34:13 2007
From: xah at xahlee.org (Xah Lee)
Date: 21 Jan 2007 21:34:13 -0800
Subject: Xah's Edu Corner: Introduction to 3D Graphics Programing
In-Reply-To: <1166836083.084101.25870@73g2000cwn.googlegroups.com>
References: <1166836083.084101.25870@73g2000cwn.googlegroups.com>
Message-ID: <1169444053.559779.233100@s34g2000cwa.googlegroups.com>

Xah Lee wrote in 2006-12-22:
> Of Interest:
>
> Introduction to 3D Graphics Programing
> http://xahlee.org/3d/index.html

Folks, i have expanded my tutorial to several pages in the past nearly
two months, and thank you very much for those who have given
encouragement.

I had plans to write pages that actually contained Python or Perl and
elisp code to demonstrate the mingled use of common languages with
POV-RAY and other tools for doing algorithmic mathematical art...

However, i'm posting now for one in-credible discovery that amazed me,
and believe it is a revolutionary both with respect to technology, as
well as its social impact.

Following is my brief introduction. The web version is at:
Introduction to Second Life
http://xahlee.org/sl/sl.html

-------

Introduction to Second Life

Xah Lee, 2007-01-09

above: A screenshot of a location in Second Life.

This place is called ?The Future?, it is a place built by Henry
Segerman ? built.

Second Life is a online virtual world with 2 million accounts as of
2006-12, and reportedly 10 thousand users logged in at any moment.
Basically, you operate a software that is a 3D world much like 3D
games, but everything in the ?game? is built by users, and you can
interact with other users, including buying and selling virtual land
with real money. What people do inside Second Life is entirely up to
them (as in real life). And, as it happens, what people do mostly in
Second Life are pretty much what people do in real life. The major
activities are: sex, shopping, socializing, dancing.

My mathematician friend Henry Segerman introduced me to 2nd life. (also
because it appeared in Time Mag in 2006-12.) Henry has a 2nd life page
that contains many math objects made in Second Life:
http://www.stanford.edu/~segerman/2ndlife.html.

Part of my interest in Second Life is to build geometric models. (See
Introduction to 3D Graphics Programing) I have for the past couple
years sought for a software platform/system where i can build 3D
objects, with abilities to do interactive adjustment (such as moving a
slide to change a surface's parameter), dynamic rotation (viewing from
different angles), animations (such as morphing that shows geometric
processes), and most of all, walk-thru in it as if it is a building.

As far as my experiences goes, no software platform for 3D graphics are
close to the ideal of what i need to do. They lack one feature or the
other, or otherwise requires the programer to be a specialist with
years of dedication in learning the tool. For example, Mathematica?
has great collection of math functions but no dynamic graphics.
POV-RAY? and 3D-modelers like AutoCAD? can do great in building 3D
objects but they are not designed for interactivity, animations, or
walk-thru. Java the programming language? allows one to write applets
that does rotation and interactive manipulation but programing in Java
is extremely unnecessarily complex and yet it is still not possible to
do walk-thrus. The one class of platform that does all these, is 3D
game engines. But alas, they take a dedicated game programing
specialist to be able to use it. Second Life changed all this.

(Note: Just for completness, my requirement for a 3D-graphics
programing software system is this: ? easy to use for average
programers or scientists. ? Easy to build geometry models, such as
basic shapes like spheres and blocks, as well as surfaces or meshes of
triangles. ? designed for interactivity. That is, the programer can
easily build buttons and sliders that changes parameters and have the
object reflect these changes visually right away. ? the user can
easily change viewing angles or rotate the object. ? The programer
can easily do animations. For example, morph a sphere into a cube, or a
bunch of spheres flying in space as a swarm of flies. ? The ability
to do walk-thru (or fly-thru). For example, if i build a fancy 3D-maze
or architecture, i should be able to ? say ? become a ant, and walk
inside the object, so as to view the object from inside and as well as
getting the real experience of perceiving such a building. (Before my
discover of Second Life, the platform that i was considering nearly
ideal and preparing to learn, are VPython? and Macromedia Flash? (i
do still plan to learn these technologies) ))

Second Life is not just the answer to my mathematical fantasies, but
because of its Real-World nature, being run and build by real people,
and with scarily real money market of the virtual dollars it uses, is
nothing but a technological revolution with great social impact. It is
essentially the virtual-3D-world-wide-web dream of VRML? envisioned
around 1995.

Anshe Chung? is famouly known for being the first to become a (real
world) millionaire by selling entirely virtual items and virtual
services inside Second Life.

For a encyclopedic introduction, see: Second Life?

Here are some articles about Second Life. (note that there are a lot
linked at the bottom of the Wikipedia article.)

    * Time Mag: ?My So-Called Second Life?, By Joel Stein,
20061216.?
    * businessWeek online: INSIDE INNOVATION ? IN SIDE. Second Life
Lessons. By Reena Jana and Aili McConnon. 2006-11-27.?

2007-01-21, Addendum

Recently i heard of Entropia Universe?. I haven't taken a closer look
but i think it is a competitor to Second Life.

Note that Second Life may not be and is probably not the first virtual
world. And, when virtual world like Second Life becomes household
activity as the internet is today, it will probably not be known as
Second Life or run by one single company, but diverse companies with
servers all over the world, where there is a unified virtual world all
the world's people can be in. (This situation may be likened to the
internet circa 1995. Or, perhaps also similar when telephone was in its
pioneering days.)

----

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



From mail at microcorp.co.za  Thu Jan 11 00:41:12 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 11 Jan 2007 07:41:12 +0200
Subject: Is there a way to protect a piece of critical code?
References: <mailman.2524.1168424917.32031.python-list@python.org>
	<7xac0rovp4.fsf@ruckus.brouhaha.com>
Message-ID: <004e01c73543$1a9c99a0$03000080@hendrik>



"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote:


> "Hendrik van Rooyen" <mail at microcorp.co.za> writes:
> > I would like to do the following as one atomic operation:
> > 
> > 1) Append an item to a list
> > 2) Set a Boolean indicator
> 
> You could do it with locks as others have suggested, but maybe you
> really want the Queue module.
> 
> 
Please see my reply to Robert - am aware of queue, using it in fact.



From could.net at gmail.com  Fri Jan 26 03:46:37 2007
From: could.net at gmail.com (Frank Potter)
Date: 26 Jan 2007 00:46:37 -0800
Subject: how to remove c++ comments from a cpp file?
Message-ID: <1169801197.941449.303000@v33g2000cwv.googlegroups.com>

I only want to remove the comments which begin with "//".
I did like this, but it doesn't work.

r=re.compile(ur"//[^\r\n]+$", re.UNICODE|re.VERBOSE)
f=file.open("mycpp.cpp","r")
f=unicode(f,"utf8")
r.sub(ur"",f)

Will somebody show me the right way?
Thanks~~



From "trades\" at (none)  Tue Jan 30 08:56:41 2007
From: "trades\" at (none) (none)
Date: Tue, 30 Jan 2007 07:56:41 -0600
Subject: deepcopy alternative?
In-Reply-To: <1170117161.953913.276600@v33g2000cwv.googlegroups.com>
References: <45be808e$0$27074$4c368faf@roadrunner.com>
	<1170117161.953913.276600@v33g2000cwv.googlegroups.com>
Message-ID: <45bf4e99$0$28076$4c368faf@roadrunner.com>

Szabolcs Nagy wrote:
>> I believe the only thing stopping me from doing a deepcopy is the
>> function references, but I'm not sure.  If so is there any way to
>> transform a string into a function reference(w/o eval or exec)?
> 
> what's your python version?
> for me deepcopy(lambda:1) does not work in py2.4 but it works in py2.5
> (in py2.4 i tried to override __deepcopy__ but it had no effect)
> 

Thanks that fixed the problem real quick :)

Jack Trades


From Thomas.Ploch at gmx.net  Sun Jan  7 15:01:29 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sun, 07 Jan 2007 21:01:29 +0100
Subject: Python re expr from Perl to Python
In-Reply-To: <20070107210940.1596.4.NOFFLE@dieschf.news.arcor.de>
References: <GzOnh.112$a81.91@nntpserver.swip.net>
	<20070107210940.1596.4.NOFFLE@dieschf.news.arcor.de>
Message-ID: <45A15199.9040906@gmx.net>

Florian Diesch schrieb:
> "Michael M." <michael at mustun.ch> wrote:
> 
>> In Perl, it was:
>>
>>
>>   ## Example: "Abc | def | ghi | jkl"
>>   ##       -> "Abc ghi jkl"
>>   ## Take only the text betewwn the 2nd pipe (=cut the text in the 1st
>> pipe).
>>   $na =~ s/\ \|(.*?)\ \|(.*?)\ \|/$2/g;
>>
>>   ## -- remove [ and ] in text
>>   $na =~ s/\[//g;
>>   $na =~ s/\]//g;
>>   # print "DEB: \"$na\"\n";
>>
>>
>> # input string
>> na="Abc | def | ghi | jkl [gugu]"
>> # output
>> na="Abc ghi jkl gugu"
>>
>>
>> How is it done in Python?
> 
>>>> import re
>>>> na="Abc | def | ghi | jkl [gugu]"
>>>> m=re.match(r'(\w+ )\| (\w+ )\| (\w+ )\| (\w+ )\[(\w+)\]', na)
>>>> na=m.expand(r'\1\2\3\5')
>>>> na
> 'Abc def ghi gugu'

I'd rather have the groups grouped without the whitespaces

 >>> import re
 >>> na="Abc | def | ghi | jkl [gugu]"
 >>> m=re.match(r'(\w+) \| (\w+) \| (\w+) \| (\w+) \[(\w+)\]', na)
 >>> na=m.expand(r'\1 \3 \4 \5')
 >>> na
 'Abc ghi jkl gugu'

Thomas



From robert.kern at gmail.com  Fri Jan  5 05:09:19 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 05 Jan 2007 04:09:19 -0600
Subject: where to find wx package
In-Reply-To: <enl7h1$49m$1@zam602.zam.kfa-juelich.de>
References: <enl7h1$49m$1@zam602.zam.kfa-juelich.de>
Message-ID: <enl84j$gn4$1@sea.gmane.org>

siggi wrote:
> Hi all,
> 
> a newbie question:
> 
> I have a program gui03A.py using wxPython, importing it such:
> "from wxPython.wx import *"
> 
> The program works, but I get the warning message:
> 
> "gui03A.py:4: DeprecationWarning: The wxPython compatibility package is no
> longer  automatically generated or activly maintained.  Please switch to the
> wx package  as soon as possible."
> 
> However, after extensive searching on www.python.org and Googling the web, I
> do not find any package with "wx" as its only name.
> 
> Where can I get the wx package (for win32 XP)?

It's the same project (from the people at www.wxpython.org), they just renamed
the package. You already have it installed.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From harry.g.george at boeing.com  Wed Jan 24 05:54:04 2007
From: harry.g.george at boeing.com (Harry George)
Date: Wed, 24 Jan 2007 10:54:04 GMT
Subject: My python programs need a GUI, wxPython or PyQt4?
References: <ep60jp$63v$1@aioe.org> <ep64ic$epi$1@aioe.org>
	<45b69f63$0$24463$88260bb3@free.teranews.com>
	<mEJth.20273$bH4.2768@tornado.fastwebnet.it>
	<mailman.3089.1169652763.32031.python-list@python.org>
Message-ID: <xqxfya0n19v.fsf@cola3.ca.boeing.com>

"Chris Mellon" <arkanes at gmail.com> writes:

> On 1/24/07, Giovanni Bajo <noway at ask.me> wrote:
[snip]
> >
> > That page is legal babble, trying to trick you into buying (or making your
> > boss buy) a commercial license. The Qt Open Source edition *IS* GPL and thus
> > it falls under all the normal GPL clauses and uses, irrespective of what
> > Trolltech may or may not think.
> >
> > For instance, see this FAQ:
> > http://www.gnu.org/licenses/gpl-faq.html#GPLRequireSourcePostedPublic
> >
> > which makes pretty clear that a "company"/"organization" is basically the same
> > of an "individual". "Releasing a software within a company for internal usage"
> > is by no means the same of "releasing it to the public". Basically, for what
> > the GPL is concerned, it is *not* a "release" or a "distribution" at all.
> >
> 
> I should point out that the FSFs position in this regard is not
> supported by copyright law and that the fact that Trolltech takes a
> different position is something that you should consider strongly. If
> the FSFs position were true, there would be no need for per-seat
> licensing of commercial software (because internal distribution
> wouldn't be). US copyright law does not draw a distinction between
> "internal distribution" and any other kind, and I'm not aware of any
> case law that does so either. This distinction is also not codified in
> the GPL itself anywhere, so it's not a necessary condition of the
> license - it is an interpretation by the FSF and that is all.
[snip]

It is all interpretation -- even after some cases have wandered
through the courts.  Mostly the trolltech statements indicate their
intent to sue.  That right there tells me I want to go elsewhere.


-- 
Harry George
PLM Engineering Architecture


From ramdaz at gmail.com  Tue Jan  2 01:42:35 2007
From: ramdaz at gmail.com (Ramdas)
Date: 1 Jan 2007 22:42:35 -0800
Subject: How do I add users using Python scripts on a Linux machine
In-Reply-To: <mailman.2191.1167695021.32031.python-list@python.org>
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
Message-ID: <1167720155.296077.233010@42g2000cwt.googlegroups.com>

Well,

I need to add users from a web interface for a web server, which runs
only Python. I need to add users, set quotas and in future even look at
managing ip tables to limit bandwidth.

I know os.system(), but this has to be done through a form entry
through a web interface.

Anyways thanks, do advise if there more pythonic solutions

Ramdas


Hari Sekhon wrote:
> That is shell scripting with a python layer on top. Is there a
> specific reason you have to use python? Why not just use shell, that's
> what it's designed for? Unless you have some complex maths/networking
> requirement or something on top.
>
> -h
>
> On 01/01/07, Daniel Klein <danielkleinad at gmail.com> wrote:
> > On 1 Jan 2007 11:33:42 -0800, "Ramdas" <ramdaz at gmail.com> wrote:
> >
> > >How do I add users using Python scripts on a Linux machine?
> > >
> > >Someone has a script?
> >
> > This should be as easy as something like:
> >
> > os.system("/usr/sbin/useradd -m -d /home/newuser -s /bin/ksh")
> >
> > Dan
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
> 
> 
> -- 
> Hari Sekhon



From bruno.desthuilliers at websiteburo.com  Thu Jan 25 07:43:43 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Thu, 25 Jan 2007 13:43:43 +0100
Subject: While loop with "or"? Please help!
In-Reply-To: <epa8cl$vl0$02$1@news.t-online.com>
References: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
	<45b8a31d$0$2401$426a74cc@news.free.fr>
	<epa8cl$vl0$02$1@news.t-online.com>
Message-ID: <45b8a5fd$0$27474$426a74cc@news.free.fr>

Peter Otten a ?crit :
> Bruno Desthuilliers wrote:
> 
>> and simplified again thanks to Python 'in' operator:
>> while not usrinp.lower() in "yn":
> 
> But note that 'in' performs a substring search and therefore "yn" and ""
> would be accepted as valid answers, too.

Mmm, right. Thanks for the correction.

=>
   while not usrinp.lower() in ['y', 'n']:



From bsg075 at gmail.com  Fri Jan 26 14:35:55 2007
From: bsg075 at gmail.com (Matt)
Date: 26 Jan 2007 11:35:55 -0800
Subject: Editor with visual SCC / TFS support ?
Message-ID: <1169840155.437260.90080@j27g2000cwj.googlegroups.com>

Company has switched to MS Team Foundation Server from VSS. Need a
programmers text editor that interfaces with TFS or SCC providers to
visually provide checkin/out status on project files. So far, in all of
the editors I have used, some support SCC interfaces, but do not show
the file status.

The current alternative is to load Visual Studio (or the TFS client
which is simply a subset of VS), simply to manage checkins. Using
command line calls is also an options, but visualizing the file status
would be more helpful.

Suggestions?



From guettli.usenet at thomas-guettler.de  Wed Jan 17 10:31:03 2007
From: guettli.usenet at thomas-guettler.de (Thomas Guettler)
Date: 17 Jan 2007 15:31:03 GMT
Subject: Newbie: Capture traceback message to string?
References: <mailman.2805.1168997715.32031.python-list@python.org>
Message-ID: <516tpnF1ic39jU1@mid.individual.net>

Sean Schertell wrote:

> Hello!
>
> I'm new to Python and this is my first post to the list.
>
> I'm trying to simply capture exception text to a few strings which  
> can be passed to a PSP page to display a pretty error message. The  
> problem is that I just can't seem to figure out how to get the basic  
> components of the traceback message into strings. Here's what I want  
> to do:
>


# http://www.thomas-guettler.de/vortraege/python/beispiele.py.txt
def foo():
    raise("Das ist eine Exception")
try:
    foo()
except:
    import traceback
    import cStringIO
    (exc_type, exc_value, tb) = sys.exc_info()
    exc_file = cStringIO.StringIO()
    traceback.print_exception(exc_type, exc_value, tb, file=exc_file)
    exc_string=exc_file.getvalue()
    print exc_string

Why don't you use cgitb? It is one reason why I like this language.

HTH,
 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From raymond.zhou.ecnumstc at gmail.com  Thu Jan  4 05:07:29 2007
From: raymond.zhou.ecnumstc at gmail.com (Raymond)
Date: Thu, 4 Jan 2007 18:07:29 +0800
Subject: Draw rectangle on a Window DC
Message-ID: <459cd1e4.0232d77c.0893.ffff821d@mx.google.com>

Hi?

I want to Draw rectangle on Dc when gived a position. Can you teach me? Let
me view your code?

 

Thanks.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070104/b72b051b/attachment.html>

From nagle at animats.com  Sat Jan 27 21:29:17 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 27 Jan 2007 18:29:17 -0800
Subject: Do I need Python to run Blender correctly?
In-Reply-To: <joTuh.3445$4W5.1382@newsfe10.phx>
References: <tRZth.2027$pH3.140@newsfe12.phx>
	<5%4uh.75582$wP1.6882@newssvr14.news.prodigy.net>
	<joTuh.3445$4W5.1382@newsfe10.phx>
Message-ID: <ssTuh.36083$QU1.26111@newssvr22.news.prodigy.net>

AKA gray asphalt wrote:
> "John Nagle" <nagle at animats.com> wrote in message 
> news:5%4uh.75582$wP1.6882 at newssvr14.news.prodigy.net...
> 
>>AKA gray asphalt wrote:
>>
>>>I downloaded Blender but there was no link for python. Am I on the right 
>>>track?
>>
>>   Blender doesn't require Python, but if you have Python, you can
>>write plug-ins for Blender.   Get "The Blender Book"; otherwise
>>you'll never figure Blender out.
>>
>>John Nagle
> 
> 
> I'm thinking about not upgrading "Strata 3D" because it still doesn't export 
> textures with obj files and it just created an undo of more than one action, 
> believe it or not... Am I expectiong too much of a $400+ program, to export 
> textures with obj files? Does Blender do this? I see the BBook on Amazon for 
> $30. That's probably my best bet, no?

    Blender has considerable power, but ease of use is a problem.  The
hotkey listing in the manual is 29 pages.

					


From no-spam at no-spam-no-spam.invalid  Wed Jan 17 13:41:59 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 17 Jan 2007 19:41:59 +0100
Subject: predefined empty base class ??
In-Reply-To: <eolnt7$umc$1@news.albasani.net>
References: <1169053011.399278.290980@a75g2000cwd.googlegroups.com>
	<eolnt7$umc$1@news.albasani.net>
Message-ID: <eolqkf$42j$1@news.albasani.net>

robert wrote:
> iwl wrote:
>> Hi,
>>
>> is there an predefined empty base class
>> which I can instanziate to have an container i can copy attributes in?
>>
> 
> you are not the only one missing such class
> 
> http://groups.google.com/group/comp.lang.python/msg/3ff946e7da13dba9
> 
> RFE SF #1637926
> 


( and x=Exception();x.a=1  will do it preliminary )


Robert


From istvan.albert at gmail.com  Mon Jan 15 09:21:38 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: 15 Jan 2007 06:21:38 -0800
Subject: Python web app. (advice sought)
References: <45aae51b.0@entanet>
Message-ID: <1168870898.693882.44980@s34g2000cwa.googlegroups.com>


Duncan Smith wrote:

> I've had a look at Django, Turbogears and Plone, and at the moment I am
> torn between Turbogears and Plone.  I

Plone is not suited for the type of application you are building (as
others have pointed out in this thread).

Take a second look at TurboGears (or CherryPy for that matter). You
might have discounted Django a bit too soon. It has the best
documentation and it is the most consistent framework.

You might end up bringing in new people into your project and that will
go a lot easier when you have good docs to help them as well. 

i.



From steve at holdenweb.com  Sun Jan 28 09:09:48 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 28 Jan 2007 14:09:48 +0000
Subject: Ip address
In-Reply-To: <1169990510.352536.4760@a34g2000cwb.googlegroups.com>
References: <mailman.3244.1169978684.32031.python-list@python.org>
	<1169990510.352536.4760@a34g2000cwb.googlegroups.com>
Message-ID: <epiaru$496$1@sea.gmane.org>

Adam wrote:
> Hey,
> 
> This will get your IP address:
> 
> #######Code########
> print socket.gethostbyaddr(socket.gethostname())
> ('compname', [], ['192.168.1.2'])
> ########End Code########
> 
> If you are wanting to to communicate over the internet you will have 
> to get the IP of you rounter. So you will have to either find a way to 
> talk to your router or try and use an online service like these other 
> guys suggest.

There is absolutely no need to know the IP address of "your router" to 
communicate with Internet devices. Either your IP layer is configured to 
know the addresses of one or more routers, or it has discovered those 
address by dynamic means, or you can't get off-net because there aren't 
any routers.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From vedran at v-programs.com  Thu Jan  4 14:32:25 2007
From: vedran at v-programs.com (Croteam)
Date: 4 Jan 2007 11:32:25 -0800
Subject: py2exe setup strange error
Message-ID: <1167939145.491799.68670@s80g2000cwa.googlegroups.com>

Hello,

I was trying to install my script (.py) to (.exe) and when I run setup
script with cmd I get the
error:

python mysetup.py py2exe

error: COREDLL.dll: No such file or directory







                       Thanks!!!!!!!



From toby at tobiah.org  Mon Jan 22 16:49:00 2007
From: toby at tobiah.org (Tobiah)
Date: Mon, 22 Jan 2007 13:49:00 -0800
Subject: How to convert a string into an integer
In-Reply-To: <1169502340.434227.224820@11g2000cwr.googlegroups.com>
References: <1169502340.434227.224820@11g2000cwr.googlegroups.com>
Message-ID: <45b524a3$0$24475$88260bb3@free.teranews.com>


> count = sys.argv[2]
> for i in range(count):
>     #do some stuff

for i in range(int(count)):


-- 
Posted via a free Usenet account from http://www.teranews.com



From alain.walter at thalesgroup.com  Wed Jan 31 03:47:13 2007
From: alain.walter at thalesgroup.com (awalter1)
Date: 31 Jan 2007 00:47:13 -0800
Subject: thread and processes with python/GTK
In-Reply-To: <5297euF1ndifjU1@mid.individual.net>
References: <1170151634.019690.320310@k78g2000cwa.googlegroups.com>
	<5297euF1ndifjU1@mid.individual.net>
Message-ID: <1170233233.710517.65870@v33g2000cwv.googlegroups.com>

HI,

I launch my application by 'python script.py'
I've already add a sys.stdout.flush with no effect.

if the idle_add is an alternative to thread, where to get details
about its use (no reference in http://www.pygtk.org/docs/pygtk/
index.html, but very brief information in GTK+ documentation)
In my case how to implement the system call 'ps -def' through idle_add

Thanks

On 30 jan, 16:44, Thomas Guettler <guettli.use... at thomas-guettler.de>
wrote:
> Hi,
>
> how do you start the python app? Goes stdout
> to a terminal or a pipe?
>
> "python script.py"
> and "python script.py | cat" behave different.
>
> Maybe "sys.stdout.flush()" helps you.
>
> BTW, I switched from threads to idle_add for pygtk
> applications.
>
>
>
>
>
> awalter1 wrote:
> > Hello,
>
> > I'm developping an application with python, pyGTK and GTK+.
> > I've performed many tests by using methods as Popen, popen2,
> > os.system ... to communicate with Unix (HPUX),
> > The last attempt is this code written in a thread :
> >        fin,fout = popen2.popen2('ps -def')
> >        line = fin.readline()
> >        while 1 :
> >            if not line : break
> >            print "line=",line
> >            line = fin.readline()
> >        fin.close()
> > In that case, lines are printed only when I exit my application.
> > Usually the behavior is not as expected and I cannot understand why. I
> > am wondering that it could be a constraint from the use of GTK
> > (mainloop() existence ???).
> > Is somebody aware about conflict between GTK use and unix mechanism.
>
> > Thanks for you help
>
> --
> Thomas G?ttler,http://www.thomas-guettler.de/http://www.tbz-pariv.de/
> E-Mail: guettli (*) thomas-guettler + de
> Spam Catcher: niemand.leerm... at thomas-guettler.de- Masquer le texte des messages pr?c?dents -
>
> - Afficher le texte des messages pr?c?dents -




From no-spam at no-spam-no-spam.invalid  Sun Jan  7 16:16:50 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sun, 07 Jan 2007 22:16:50 +0100
Subject: Python cheatsheets
In-Reply-To: <mailman.2400.1168203791.32031.python-list@python.org>
References: <mailman.2400.1168203791.32031.python-list@python.org>
Message-ID: <enrnvg$4qa$1@news.albasani.net>

gonzlobo wrote:
> Curious if anyone has a python cheatsheet* published? I'm looking for
> something  that summarizes all commands/functions/attributes. Having
> these printed on a 8" x 11" double-sided laminated paper is pretty
> cool.
> 
> * cheatsheet probably isn't the right word, but you get the idea. :)

search: python quick reference

e.g.: http://www.benyoonline.com/pqr/pqr24/PQR2.4.html


Robert


From olsonas at gmail.com  Mon Jan 29 14:10:45 2007
From: olsonas at gmail.com (Drew)
Date: 29 Jan 2007 11:10:45 -0800
Subject: List Behavior when inserting new items
In-Reply-To: <526ut2F1n2q69U1@mid.uni-berlin.de>
References: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
	<526ut2F1n2q69U1@mid.uni-berlin.de>
Message-ID: <1170097845.805992.118870@h3g2000cwc.googlegroups.com>

> What is your actual usecase?
>
> diez

The issue is that I don't know how long the list will eventually be. 
Essentially I'm trying to use a 2D list to hold lines that I will 
eventually print to the screen. Blank elements in the list will be 
printed as spaces. I suppose every time I add an element, I could find 
the difference between the size of the list and the desired index and 
fill in the range between with " " values, however I just wanted to 
see if there was a more natural way in the language.

Thanks,
Drew



From cvanarsdall at mvista.com  Wed Jan 24 12:45:04 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 24 Jan 2007 09:45:04 -0800
Subject: The reliability of python threads
In-Reply-To: <17847.39003.410596.481072@montanaro.dyndns.org>
References: <45B7904B.90303@mvista.com>
	<17847.39003.410596.481072@montanaro.dyndns.org>
Message-ID: <45B79B20.9010501@mvista.com>

skip at pobox.com wrote:
>     Carl> Does anyone have any conclusive evidence that python threads/locks
>     Carl> are safe or unsafe?
>
> In my experience Python threads are generally safer than the programmers
> that use them. ;-)
>   
Haha, yea, tell me about it.  The whole GIL thing made me nervous about 
the locking operations happening truly atomically and not getting 
weird.  Thanks for ensuring me that i'm just nuts :)

-carl

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From buzzard at urubu.freeserve.co.uk  Sat Jan 27 21:10:18 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Sun, 28 Jan 2007 02:10:18 +0000
Subject: set update in 2.5
Message-ID: <45bc0c0c.0@entanet>

Hello,
     In moving from 2.4 to 2.5 I find that some of my unit tests are now
failing.  I've worked out that the problem relates to the set update
method.  In 2.4 I could update a set with an iterable type derived from
dict as the argument.  I now find that the set is updated with the hash
values of the items in my iterable, rather than the items themselves.
Converting to a list first gets round the problem.

My iterable type has the same API as 'set' but requires items to have
hashable 'uid' attributes, so they can also be looked up by uid.  I hope
this, and the fact that this worked fine in 2.4 will be enough to track
down the issue without me having to paste reams of code (other than the
following, pasted from IDLE).  Any ideas?  Cheers.

Duncan


>>> from graphItems import Node
>>> from keyed_sets import KeyedSet
>>> n = Node(1)
>>> n.uid
1
>>> k = KeyedSet([n])
>>> k
KeyedSet([1])
>>> type(iter(k).next())
<class 'graphItems.Node'>
>>> type(k[1])
<class 'graphItems.Node'>
>>> s = set()
>>> s.update(list(k))
>>> type(iter(s).next())
<class 'graphItems.Node'>
>>> s = set()
>>> s.update(k)
>>> type(iter(s).next())
<type 'int'>
>>> s = set()
>>> s.add(n)
>>> type(iter(s).next())
<class 'graphItems.Node'>
>>> hash(n)
1
>>>


From alec at mihailovs.com  Sat Jan  6 00:44:10 2007
From: alec at mihailovs.com (Alec Mihailovs)
Date: Sat, 06 Jan 2007 05:44:10 GMT
Subject: Memoization in Python
References: <ibpnh.230$TE4.85@news02.roc.ny>
	<mailman.2319.1167995348.32031.python-list@python.org>
Message-ID: <KGGnh.44$B25.32@news01.roc.ny>

"Gabriel Genellina" <gagsl-py at yahoo.com.ar> wrote
>
> Nice. There is already a memoize decorator in the Python wiki: 
> http://wiki.python.org/moin/PythonDecoratorLibrary, you can get some ideas 
> from there. Using the functools module (2.5) or the decorator module by M. 
> Simoniato (http://www.phyast.pitt.edu/~micheles/python/documentation.html) 
> you can improve it so the decorated function looks more like the original.

Thank you very much. Both references are very useful.

Alec 




From __peter__ at web.de  Thu Jan 18 07:51:20 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 18 Jan 2007 13:51:20 +0100
Subject: generate tuples from sequence
References: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>
	<eol9ac$v3l$02$1@news.t-online.com> <KaCrh.1768$R76.979@trnddc05>
	<eon8k9$39m$02$1@news.t-online.com>
	<Xns98BC7B2071AD8duncanbooth@127.0.0.1>
Message-ID: <eonqfo$p01$00$1@news.t-online.com>

Duncan Booth wrote:

> Peter Otten <__peter__ at web.de> wrote:
>> But still, to help my lack of fantasy -- what would a sane zip()
>> implementation look like that does not guarantee the above output?
>> 
> Hypothetically?
> 
> The code in zip which builds the result tuples looks (ignoring error
> handling) like:
> 
> // inside a loop building each result element...
>     PyObject *next = PyTuple_New(itemsize);
> 
>     for (j = 0; j < itemsize; j++) {
>         PyObject *it = PyTuple_GET_ITEM(itlist, j);
>         PyObject *item = PyIter_Next(it);
>         PyTuple_SET_ITEM(next, j, item);
>     }
> 
> For fixed size tuples you can create them using PyTuple_Pack. So imagine
> some world where the following code works faster for small tuples:
> 
>    // Outside the loop building the result list:
>    PyObject *a, *b, *c;
>    if (itemsize >= 1 && itemsize <= 3) a = PyTuple_GET_ITEM(...);
>    if (itemsize >= 2 && itemsize <= 3) b = PyTuple_GET_ITEM(...);
>    if (itemsize == 3) c = PyTuple_GET_ITEM(...);
>    ...
> 
>    // inside the result list loop:
>    PyObject *next;
>    if (itemsize==1) {
>        next = PyTuple_Pack(1,
>                 PyIter_Next(a));
>    } else if (itemsize==2) {
>        next = PyTuple_Pack(2,
>                 PyIter_Next(a),
>                 PyIter_Next(b));
>    } else if (itemsize==2) {
>        next = PyTuple_Pack(3,
>                 PyIter_Next(a),
>                 PyIter_Next(b),
>                 PyIter_Next(c));
>    } else {
>        next = PyTuple_New(itemsize);
> 
>        for (j = 0; j < itemsize; j++) {
>            PyObject *it = PyTuple_GET_ITEM(itlist, j);
>            PyObject *item = PyIter_Next(it);
>            PyTuple_SET_ITEM(next, j, item);
>        }
>    }
> 
> If compiled on a system where the stack grows downwards (as it often does)
> the C compiler is very likely to evaluate function arguments in reverse
> order.
> 
> (BTW, this also assumes that it's an implementation which uses exceptions
> or something for error handling otherwise you probably can't get it right,
> but maybe something like IronPython could end up with code like this.)
> 
> Or maybe if someone added PyTuple_Pack1, PyTuple_Pack2, PyTuple_Pack3
> functions which grab their memory off a separate free list for each tuple
> length. That might speed up the time to create the tuples as you might be
> able to just reset the content not rebuild the object each time. Again
> that could make code like the above run more quickly.

Special-casing small tuples meets my sanity criterion :-)

Let's see if I understand the above: In C a call

f(g(), g())

may result in machine code equivalent to either

x = g()
y = g()
f(x, y)

or

y = g()
x = g()
f(x, y)

Is that it?

Peter



From webmaster at cacradicalgrace.org  Mon Jan 29 17:22:01 2007
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Mon, 29 Jan 2007 15:22:01 -0700
Subject: Overloading assignment operator
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
	<1169604475.177104.40330@s48g2000cws.googlegroups.com>
	<pan.2007.01.24.05.34.12.348925@REMOVEME.cybersource.com.au>
Message-ID: <epls3j$vlf$1@aioe.org>

Steven D'Aprano wrote:
> On Tue, 23 Jan 2007 18:07:55 -0800, Russ wrote:
> 
>> Achim Domma wrote:
>>> Hi,
>>>
>>> I want to use Python to script some formulas in my application. The user
>>> should be able to write something like
>>>
>>> A = B * C
>>>
>>> where A,B,C are instances of some wrapper classes. Overloading * is no
>>> problem but I cannot overload the assignment of A. I understand that
>>> this is due to the nature of Python, but is there a trick to work around
>>> this?
>>> All I'm interested in is a clean syntax to script my app. Any ideas are
>>> very welcome.
>>>
>>> regards,
>>> Achim
>> Why do you need to overload assignment anyway? If you overloaded "*"
>> properly, it should return
>> the result you want, which you then "assign" to A as usual. Maybe I'm
>> missing something.
> 
> One common reason for overriding assignment is so the left-hand-side of
> the assignment can choose the result type. E.g. if Cheddar, Swiss and
> Wensleydale are three custom classes, mutually compatible for
> multiplication:
> 
> B = Cheddar()  # B is type Cheddar
> C = Swiss()    # C is type Swiss
> # without overloading assignment
> A = B * C      # A is (possibly) Cheddar since B.__mul__ is called first
> A = C * B      # A is (possibly) Swiss since C.__mul__ is called first
> # with (hypothetical) assignment overloading 
> A = B * C      # A is type Wensleydale since A.__assign__ is called
> 
> Except, of course, there is no assignment overloading in Python. There
> can't be, because A may not exist when the assignment is performed, and
> if it does exist it might be a complete different type.
> 
> Instead, you can do something like this:
>  
> A = Wensleydale(B) * Wensleydale(C)
> 
> or 
> 
> A = Wensleydale(B * C)
> 
> 
> 
> 

I think that's the first time I've actually seen someone use a Monty
Python theme for a python example, and I must say, I like it.  However,
"We are all out of Wensleydale."

Cheers,
Cliff


From klaus at seistrup.dk  Sun Jan 28 08:42:23 2007
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Sun, 28 Jan 2007 13:42:23 +0000 (UTC)
Subject: IP address
References: <mailman.3244.1169978684.32031.python-list@python.org>
	<ephtph$fcl$1@minji.szn.dk>
	<mailman.3246.1169990941.32031.python-list@python.org>
Message-ID: <epi97v$6uk$2@minji.szn.dk>

Colin J. Williams wrote:

> Your one-liner doesn't work for me, with Windows XP, but the 
> following does, within Python.

Could it be due to shell-escaping issues?  I don't know anything 
about Windows...

Cheers,

-- 
Klaus Alexander Seistrup
http://klaus.seistrup.dk/



From wescpy at gmail.com  Fri Jan 12 17:53:54 2007
From: wescpy at gmail.com (wesley chun)
Date: Fri, 12 Jan 2007 14:53:54 -0800
Subject: ANN: Advanced Python training course, Nov 8-10, San Francisco
In-Reply-To: <78b3a9580610111039hf332877ke9433cc0760143c6@mail.gmail.com>
References: <78b3a9580610111039hf332877ke9433cc0760143c6@mail.gmail.com>
Message-ID: <78b3a9580701121453w42b5dbd4red7346a9be078401@mail.gmail.com>

FINAL REMINDER... we still have some seats left!

What:   (Intensive) Intro to Python
When:  February 7-9, 2007
Where: San Francisco (SFO/San Bruno), CA, USA
Web:    http://cyberwebconsulting.com (click "Python Training" link)

Need to get up-to-speed with Python as quickly as possible?  Come join
us in beautiful Northern California for another one of our rigorous
Python training events! This is an intense introduction to Python
directed towards those who have some proficiency in another high-level
language. This course will take place in San Bruno right near the San
Francisco International Airport.

LOCALS: easy freeway (101/280/380) with lots of parking plus public
transit (BART and CalTrain) access via the San Bruno stations, easily
accessible from all parts of the Bay Area

VISITORS: free shuttle to/from the airport, free high-speed internet,
free breakfast and evening reception daily

The cost is only $1095 (reg $1295) per attendee.  Discounts are
available for multiple registrations as well as teachers/students.
Registration will be opening soon for the next Intro and Advanced
courses both taking place back-to-back in May 2007. See website for
more details.

hope to meet you soon!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From Andreas.Ames at comergo.com  Wed Jan 10 05:04:27 2007
From: Andreas.Ames at comergo.com (Ames Andreas)
Date: Wed, 10 Jan 2007 11:04:27 +0100
Subject: dynamic library loading, missing symbols
Message-ID: <552B6B925278EF478EA8887D7F9E5AC301C3F9F9@tndefr-ws00024.tenovis.corp.lan>

Some random notes below ...

> -----Original Message-----
> From: python-list-bounces+andreas.ames=comergo.com at python.org 
> [mailto:python-list-bounces+andreas.ames=comergo.com at python.or
> g] On Behalf Of dfj225 at gmail.com
> Sent: Wednesday, January 10, 2007 1:26 AM
> Subject: dynamic library loading, missing symbols
> 
> The reason for the complication is that I don't have control over how
> the library does dlopen() or how the code that calls dlopen was
> compiled. I am, however, able to control the build process for the
> Boost.Python wrapper and the original C++ code that the Boost.Python
> wraps. I've tried as many linker tricks as I can think of to get this
> to work. Both the boost wrapper and the C++ code that it wraps are
> built using --export-dynamic.

* Make sure the exported symbols are marked "extern C"

* Otherwise (you export C++ symbols), make sure the exporting component uses *exactly* the same compiler (version, ABI-influencing flags and all) as the importing component.

* IMHO, C++ .sos are principally painful and almost unbearable, if you have (non-source) third party components involved.

* Use nm to find the exact names of the exported and imported symbols (as already suggested).

> 
> Is there a way to set at runtime what directories or libraries the
> linker should search for these symbols? I have set LD_LIBRARY_PATH
> correctly, but that didn't seem to affect anything.
> 
> For reference, I am running on Gentoo linux 2.6.11.12 with gcc 3.4.4
> 
> I'm interested in any ideas that might help, but the ideal one should
> work on any *nix system and not just linux.

* You might read http://people.redhat.com/drepper/dsohowto.pdf, which I found very useful.  There are ways described, how to control the way, the dynamic loader resolves symbols, all with their resp. caveats.

* Nevertheless it only describes ELF-based systems, and mostly systems using Drepper's own .so-loader.

* Portability to e.g. Windows is a almost impossible for you, because it doesn't support undefined symbols in .sos (and Drepper suggests on ELF-based systems this should only be used if absolutely unavoidable, IIRC).  NB:  There is a project on SF which claimes to provide this feature on Windows, but I haven't tried and it limits your choice of tools (http://edll.sf.net/).


cheers,

aa

-- 
Andreas Ames | Programmer | Comergo GmbH |
Voice:  +49 711 13586 7789 | ames AT avaya DOT com


From gagsl-py at yahoo.com.ar  Sun Jan 21 19:37:57 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 21 Jan 2007 21:37:57 -0300
Subject: instancemethod
References: <ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a@mail.gmail.com>
Message-ID: <ep110v$t04$1@sea.gmane.org>

"Gert Cuykens" <gert.cuykens at gmail.com> escribi? en el mensaje 
news:ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a at mail.gmail.com...

> class Db:
>
>    _db=-1
>    _cursor=-1
>
>    @classmethod
>    def __init__(self,server,user,password,database):
>        self._db=MySQLdb.connect(server , user , password , database)
>        self._cursor=self._db.cursor()
>
>    @classmethod
>    def excecute(self,cmd):
>        self._cursor.execute(cmd)
>        self._db.commit()
>
>
> if __name__ == '__main__':
>    gert=Db('localhost','root','******','gert')
>    gert.excecute('select * from person')
>    for x in range(0,gert.rowcount):
>        print gert.fetchone()
>    gert.close()

Besides your specific question that was already answered, why are you using 
classmethods at all?
You are constructing a Db instance and using it as if all were normal 
instance methods... Just remove all those @classmethod declarations and use 
it in a standard way.

-- 
Gabriel Genellina 




From adamgarstang at googlemail.com  Fri Jan  5 16:44:43 2007
From: adamgarstang at googlemail.com (Adam)
Date: 5 Jan 2007 13:44:43 -0800
Subject: Learning to program in Python
In-Reply-To: <1168028517.005902.172880@11g2000cwr.googlegroups.com>
References: <1168028517.005902.172880@11g2000cwr.googlegroups.com>
Message-ID: <1168033483.361615.53570@42g2000cwt.googlegroups.com>


jbchua wrote:

> Hello everybody.
>
> I am an Electrical Engineering major and have dabbled in several
> languages such as Python, C, and Java in my spare time because of my
> interest in programming. However, I have not done any practical
> programming because I have no idea where to get started. I taught
> myself these languages basically by e-tutorials and books. This makes
> me feel as if I don't really know how to implement these languages.
> Does anybody have any advice on where to start applying my limited
> knowledge practically in order to advance my learning?

I am just starting to learn to program as well. (In my spare time.) The
advice about deciding on a goal, a project to work on, is good.

I have just got through the basics section in this guide here
(http://www.freenetpages.co.uk/hp/alan.gauld/), which I found very
useful for beginners and the address book example you build up shows
the python in practice.

Once I had learnt about file inp/out I decided to make a program that
would split a file in half for email and then could be used to join
them together again. This helped me get used to most of what I had
learnt in the beginner section.

Also don't forget the Python.org documentation it's very helpful and is
a great companion to most the 3rd party tutorials around.



From Thomas.Ploch at gmx.net  Thu Jan  4 09:32:21 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Thu, 04 Jan 2007 15:32:21 +0100
Subject: Best way to implement a timed queue?
Message-ID: <459D0FF5.4020703@gmx.net>

Hello folks,

I am having troubles with implementing a timed queue. I am using the
'Queue' module to manage several queues. But I want a timed access, i.e.
only 2 fetches per second max. I am horribly stuck on even how I
actually could write it. Has somebody done that before? And when yes,
how is the best way to implement it?

Thanks,
Thomas


From mclaugb at nospm.yahoo.com  Sat Jan 20 11:07:43 2007
From: mclaugb at nospm.yahoo.com (mclaugb)
Date: Sat, 20 Jan 2007 16:07:43 -0000
Subject: scipy.optimize.lbfgsb help please!!!
Message-ID: <eotep7$ik$1@gemini.csx.cam.ac.uk>

Does anyone out there have a piece of code that demonstrates the use of the 
lbfgsb multivariate, bounded solver in the scipy.optimize toolkit?  An 
example would get me started because my code below does not seem to work.
Thanks alot,
Bryan


I have tried to use the LBFGSB optimisation algorithm with these parameters:

xstart = [20,-20]


x, f, d = lbfgsb.fmin_l_bfgs_b(Permmin, x0, Jacobi, params, 0, 
[(0,100),(0,-50)] , 10, 1e7, 1e-5, 1e-8, -1, 500)

I am getting this error:

 "   x, f, d = lbfgsb.fmin_l_bfgs_b(Permmin, x0, Jacobi, params, 0, 
[(.001,100),(-50,-.001)] , 10, 1e7, 1e-5, 1e-8, -1, 500)
  File "C:\Python24\lib\site-packages\scipy\optimize\lbfgsb.py", line 197, 
in fmin_l_bfgs_b
    isave, dsave)
ValueError: failed to initialize intent(inout) array -- expected elsize=8 
but got 4 -- input 'l' not compatible to 'd'
"

Permmin is a function that simply returns a vector array [xmin, ymin]

Jacobi returns an array [[A,B],[C,D]] which is the 2x2 Jacobi matrix

The rest of the parameters seem okay... 




From bdesth.quelquechose at free.quelquepart.fr  Tue Jan  2 11:05:35 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 02 Jan 2007 17:05:35 +0100
Subject: Convert Perl to Python
In-Reply-To: <pan.2006.12.29.08.39.54.777661@gmx.net>
References: <mailman.2117.1167378630.32031.python-list@python.org>
	<pan.2006.12.29.08.39.54.777661@gmx.net>
Message-ID: <459a7cb4$0$693$426a74cc@news.free.fr>

Marc 'BlackJack' Rintsch a ?crit :
> In <mailman.2117.1167378630.32031.python-list at python.org>,
> ???????? ?????? wrote:
> 
> 
>>How can I convert a perl script to Python?
> 
> 
> Look what the Perl script does and then rewrite it in Python.  Automatic
> translations between programming languages, if possible, usually result in
> code that is not supposed to be read by human beings.  Every language has
> its idioms and a "literal" translation looks very odd to "native speakers"
> of the target language.

and might be quite inefficient too...



From auch-ich-m at g-kein-spam.com  Tue Jan 30 01:36:51 2007
From: auch-ich-m at g-kein-spam.com (=?UTF-8?B?QW5kcsOp?= Malo)
Date: Tue, 30 Jan 2007 07:36:51 +0100
Subject: List Behavior when inserting new items
References: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
	<1170099535.989235.35800@a75g2000cwd.googlegroups.com>
	<1170102302.883700.87810@m58g2000cwm.googlegroups.com>
Message-ID: <3427741.k3zYug0IVv@news.perlig.de>

* Paul McGuire wrote:

>> py>    def __init__(self, arg = []):
>> py>        self.__list = arg
> 
> Please don't perpetuate this bad habit!!!  "arg=[]" is evaluated at
> compile time, not runtime, and will give all default-inited llists the
> same underlying list.

While this actually might be bad habit, the default arguments are *not*
eval'd at compile time. This seems to be a common mistake. They are
evaluated at runtime as everything else. The difference to other local
variables is, that the objects they're referring to are just initalized
once instead of each time they're taken into account.

nd
-- 
die (eval q-qq[Just Another Perl Hacker
]
;-)
# Andr? Malo, <http://pub.perlig.de/> #


From vinay_sajip at yahoo.co.uk  Mon Jan 22 00:09:56 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: 21 Jan 2007 21:09:56 -0800
Subject: selective logger disable/enable
References: <1169190498.593059.238150@q2g2000cwa.googlegroups.com>
	<1169204564.348768.186900@38g2000cwa.googlegroups.com>
	<1169349399.938121.238430@38g2000cwa.googlegroups.com>
	<1169395276.181654.160810@a75g2000cwd.googlegroups.com>
	<1169437763.213781.163660@38g2000cwa.googlegroups.com>
Message-ID: <1169442596.209314.162410@s34g2000cwa.googlegroups.com>

Gary Jefferson wrote:

> I am still a bit confused about Filters, though.  It seems they are a
> bit of an anomoly in the hierarchical view of loggers that the API
> supports elsewhere, i.e., filters don't seem to inherit...  Or am I
> missing something again?  Here's a quick example:
>
> import logging
>
> log1 = logging.getLogger("top")
> log2 = logging.getLogger("top.network")
> log3 = logging.getLogger("top.network.tcp")
> log4 = logging.getLogger("top.network.http")
> log5 = logging.getLogger("top.config")
> log6 = logging.getLogger("top.config.file")
>
> logging.basicConfig(level=logging.DEBUG,
>         format='%(asctime)s %(levelname)s %(message)s')
>
> filter = logging.Filter("top.network")
> log1.addFilter(filter)  # only affects log1, do this for each of log2-7
> too?
>
> log1.debug("I'm top")
> log2.debug("I'm top.network")
> log3.debug("I'm top.network.tcp")
> log4.debug("I'm top.network.http")
> log5.debug("I'm top.config")
> log6.debug("I'm top.config.file")
>
>
> This is only for the binary case (and I think if I ignore the binary
> case and filters altogether as you suggested), but it really would be
> nice to be able to squelch /all/ output from loggers that belong to
> certain parts of the namespace by using a filter as above (which I
> can't get to work).
>
> Perhaps if I set up a basicConfig with a loglevel of nothing, I can get
> this to approximate squelching of everything but that which I
> explicitly setLevel (which does inherit properly).
>
> In other words, the addFilter/removeFilter part of the API seems rather
> impotent if it can't be inherited in the logging namespaces.  In fact,
> I can't really figure out a use case where I could possibly want to use
> it without it inheriting.  Obviously I'm missing something.  I'm sure
> I've consumed more attention that I deserve already in this thread,
> but, do you have any pointers which can enlighten me as to how to
> effectively use addFilter/removeFilter?

I don't really think there's a problem with the logging API - it went
through a fair amount of peer review on python-dev before making it
into the Python distribution. You need to use what's there rather than
shoehorn it into how you think it ought to be. Filters are for more
esoteric requirements - you can see some examples of filters in the old
(out of date) standalone distribution at
http://www.red-dove.com/python_logging.html (download and examine some
of the test scripts). Loggers aren't binary - levels are there to be
used. Most people get by with judicious use of levels, using Filters on
loggers only for unusual cases. Since Filters are only meant to be used
in unusual situations, there is no need to think about inheriting them.

Filters can be set on Handlers so that even if Loggers log the events,
they don't go to any output if filtered out at the handlers for that
output.

BTW I would also advise reading PEP-282 to understand more about the
logging approach.

Best regards,

Vinay Sajip



From bthom at cs.hmc.edu  Thu Jan  4 13:54:04 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Thu, 04 Jan 2007 10:54:04 -0800
Subject: Set type?
In-Reply-To: <1167936480.882357.277320@v33g2000cwv.googlegroups.com>
References: <1167936480.882357.277320@v33g2000cwv.googlegroups.com>
Message-ID: <D25DC416-EDA2-4849-BDE7-ECBF0B697E34@cs.hmc.edu>

I've seen people do that using an exception, e.g.

try:
   foo
except :
   #variable foo not defined


On Jan 4, 2007, at 10:48 AM, _ wrote:

> How do you check to see if a variable is a set?  I would like to use
>
> if type(var) is types.SetType:
>    blah
>
> but that is not available in types module.  I am using 2.4
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From steven.bethard at gmail.com  Thu Jan 18 18:41:48 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 18 Jan 2007 16:41:48 -0700
Subject: A note on heapq module
In-Reply-To: <1169159235.864192.263210@v45g2000cwv.googlegroups.com>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<slrneqs4vp.b4s.apardon@rcpc42.vub.ac.be>
	<4Yidnf9NFKFm7jPYnZ2dnUVZ_u3inZ2d@comcast.com>
	<1169117876.063858.56570@s34g2000cwa.googlegroups.com>
	<8NSdnf38_otYcjLYnZ2dnUVZ_tadnZ2d@comcast.com>
	<1169159235.864192.263210@v45g2000cwv.googlegroups.com>
Message-ID: <CaGdnRMfscMmmC3YnZ2dnUVZ_vamnZ2d@comcast.com>

bearophileHUGS at lycos.com wrote:
> Steven Bethard wrote:
>> The current code fails when using unbound methods however::
> 
> I don't like your solution, this class was already slow enough. Don't
> use unbound methods with this class :-)
> Maybe there's a (better) solution to your problem: to make Heap a
> function (or classmethod) that return sone of two possibile objects
> created by one of two different classes that have different methods...

That's probably viable.  Maybe you should just have two separate 
classes: Heap and KeyedHeap.  The inplace= parameter doesn't really make 
sense for a KeyedHeap anway, so you could just have::

     Heap(sequence=None, inplace=False)
     KeyedHeap(key, sequence=None)

Of course, this approach ends up with a bunch of code duplication again.

STeVe


From bj_666 at gmx.net  Tue Jan  2 06:03:57 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 02 Jan 2007 12:03:57 +0100
Subject: Difference between __init__ (again) and nothing ...
References: <da749$459a380d$d443bb3a$16845@news.speedlinq.nl>
Message-ID: <pan.2007.01.02.11.03.56.332520@gmx.net>

In <da749$459a380d$d443bb3a$16845 at news.speedlinq.nl>, Stef Mientki wrote:

> What's the difference between using __init__ and using nothing,
> as the examples below.
> 
> class cpu:
>    PC = 4

This is a *class attribute*.  It's the same for all instances of `cpu`.

> class cpu:
>    def __init__:
>      self.PC = 4

This is an *instance attribute* which is set in every instance of `cpu`.

In [8]: class CPU_1:
   ...:     PC = 4
   ...:

In [9]: class CPU_2:
   ...:     def __init__(self):
   ...:         self.PC = 4
   ...:

In [10]: a = CPU_1()

In [11]: b = CPU_1()

In [12]: a.PC, b.PC
Out[12]: (4, 4)

In [13]: CPU_1.PC = 3.5

In [14]: a.PC, b.PC
Out[14]: (3.5, 3.5)

In [15]: c = CPU_2()

In [16]: d = CPU_2()

In [17]: c.PC, d.PC
Out[17]: (4, 4)

In [18]: c.PC = 3.5

In [19]: c.PC, d.PC
Out[19]: (3.5, 4)

Ciao,
	Marc 'BlackJack' Rintsch


From nagle at animats.com  Tue Jan 30 13:06:51 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 30 Jan 2007 18:06:51 GMT
Subject: The reliability of python threads
In-Reply-To: <epm7su$qtb$1@panix3.panix.com>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep8gue$3tu$1@panix3.panix.com>
	<mailman.3166.1169752349.32031.python-list@python.org>
	<epm7su$qtb$1@panix3.panix.com>
Message-ID: <%OLvh.67202$qO4.51886@newssvr13.news.prodigy.net>

Aahz wrote:
> In article <mailman.3166.1169752349.32031.python-list at python.org>,
> Carl J. Van Arsdall <cvanarsdall at mvista.com> wrote:
> My point is that an app that dies only once every few months under load
> is actually pretty damn stable!  That is not the kind of problem that
> you are likely to stimulate.

     This has all been so vague.  How does it die?

     It would be useful if Python detected obvious deadlock.  If all threads
are blocked on mutexes, you're stuck, and at that point, it's time
to abort and do tracebacks on all threads.   You shouldn't have to
run under a debugger to detect that.

     Then a timer, so that if the Global Python Lock
stays locked for more than N seconds, you get an abort and a traceback.
That way, if you get stuck in some C library, it gets noticed.

     Those would be some good basic facilities to have in thread support.

     In real-time work, you usually have a high-priority thread which
wakes up periodically and checks that a few flags have been set
indicating progress of the real time work, then clears the flags.
Throughout the real time code, flags are set indicating progress
for the checking thread to notice.  All serious real time systems
have some form of stall timer like that; there's often a stall
timer in hardware.

				John Nagle


From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 19 23:10:36 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 20 Jan 2007 15:10:36 +1100
Subject: Determining when a file is an Open Office Document
References: <eop5ci$et5$1@solaris.cc.vt.edu>
	<1169171820.851021.49200@l53g2000cwa.googlegroups.com>
	<eopicc$95t$1@solaris.cc.vt.edu>
	<1169239691.159739.304050@l53g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.20.04.10.35.935414@REMOVE.THIS.cybersource.com.au>

On Fri, 19 Jan 2007 12:48:14 -0800, Ross Ridge wrote:

> tubby wrote:
>> Now, If only I could something like that on PDF files :)
> 
> PDF files should begin with "%PDF-" followed by a version number, eg.
> "%PDF-1.4".  The PDF Reference notes that Adobe Acrobat Reader is a bit
> more flexiable about what it will accept:
> 
>     13. Acrobat viewers require only that the header appear
>           somewhere within the first 1024 bytes of the file.
>     14. Acrobat viewers also accept a header of the form
>           %!PS-Adobe-N.n PDF-M.m
> 
> So identifying PDF files is pretty easy.

Sure. MIS-identifying PDF files is pretty easy. Identifying them is not.
Consider this example:

$ cat not_a_pdf
%PDF-1.4
This is not a pdf file.
$ file not_a_pdf
not_a_pdf: PDF document, version 1.4

Is there a security vulnerability buried in the detection of file types by
magic bytes? I don't know, but I wouldn't be surprised if there were.

Here's another example:

$ cat not_a_gif.txt
GIF89a is the header used to define a GIF file.
$ file not_a_gif.txt
not_a_gif: GIF image data, version 89a, 26912 x 8307

Any file system that doesn't have file type metadata is reduced to
guessing the type of the file, and guesses can be wrong. As heuristics go,
"look at the characters after the dot in the file name" is not that much
worse than "look at the bytes at offset X through Y inside the file", and
has the significant advantage that it is visible and easy to change for
the end user.



-- 
Steven.



From david at boddie.org.uk  Wed Jan 17 10:51:40 2007
From: david at boddie.org.uk (David Boddie)
Date: 17 Jan 2007 07:51:40 -0800
Subject: The proper use of QSignalMapper
References: <1169045073.138626.60770@l53g2000cwa.googlegroups.com>
Message-ID: <1169049100.393777.269350@v45g2000cwv.googlegroups.com>

borntonetwork wrote:

> I am trying to implement QTCore.QSignalMapper using PyQT. I finally got
> to a point where I don't receive any compile or runtime error messages,
> but I also do not see the final slot function fire off. Here is a
> snippet of the code:
>
>         self.signalMapper = QtCore.QSignalMapper(window)
>         # Use qsignalmapper to use of one slot function for multiple
>         # widgets. The map() function sends the slot an extra param
>         # that identifies the sender.
>         for idx in range(1, maxIngredients+1):
>             wName = 'chkProductIngredientsDelete_'+str(idx)
>             w = self.__dict__[wName]
>             self.app.connect(w, QtCore.SIGNAL("stateChanged(int)"),
>                 self.signalMapper,
>                 QtCore.SLOT("self.signalMapper.map"))

You need to pass the C++ signature to the SLOT() function. I believe
you want the form that does not accept any arguments:

             self.app.connect(w, QtCore.SIGNAL("stateChanged(int)"),
                 self.signalMapper,
                 QtCore.SLOT("map()"))

Alternatively, you can pass the slot directly to the function:

             self.app.connect(w, QtCore.SIGNAL("stateChanged(int)"),
                 self.signalMapper.map)

PyQt accepts Python methods as slots, without requiring that they be
wrapped in calls to SLOT().

David



From gagsl-py at yahoo.com.ar  Sun Jan  7 14:19:58 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 11:19:58 -0800
Subject: A problem in embedding Python in a plug-in
In-Reply-To: <mailman.2369.1168109316.32031.python-list@python.org>
References: <mailman.2369.1168109316.32031.python-list@python.org>
Message-ID: <1168197598.864406.39950@s34g2000cwa.googlegroups.com>

On 6 ene, 15:29, Koichi <kotam... at hello.email.ne.jp> wrote:

> Hi, I'm now making a plug-in for a CG software. I embed
> Python in a plugin and it works. The problem is that it
> conflicts with other plugins that also embeds Python because it
> runs in the same thread. I don't know when Py_Initialize() and

Given all those constraints, I think the only safe option is to run
Python in another process.
You write a very simple plugin (NOT in Python, maybe C code) that
spawns another process (the actual Python code) and forwards all
requests to that other process, using some form of IPC.

-- 
Gabriel Genellina



From albert.wellens at gmail.com  Tue Jan 16 17:19:04 2007
From: albert.wellens at gmail.com (awel)
Date: 16 Jan 2007 14:19:04 -0800
Subject: Check a windows service
In-Reply-To: <mailman.2785.1168968712.32031.python-list@python.org>
References: <1168966952.965088.17740@l53g2000cwa.googlegroups.com>
	<1168967374.568967.173690@11g2000cwr.googlegroups.com>
	<mailman.2785.1168968712.32031.python-list@python.org>
Message-ID: <1168985943.060145.54490@a75g2000cwd.googlegroups.com>

Sorry, but could you give me an example with a real service 'cause I've
tried this script but nothings happened, no error, nothings ; even if I
launch it in cmd prompt.

Thanks


Chris Mellon a ?crit :
> On 16 Jan 2007 09:09:34 -0800, Tim Golden <tjgolden at gmail.com> wrote:
> > awel wrote:
> >
> > > I'm new in python and I would like to know if it's possible to check if
> > > a specific windows service is present and if it's possible how can I
> > > do?
> >
> > This is one way:
> >
> > http://tgolden.sc.sabren.com/python/wmi_cookbook.html#automatic_services
> >
> > You'd have to change that example slightly, but I
> > hope the principal is clear enough. If not, ask again.
> >
> > TJG
> >
>
> Here's some code cut & pasted from the demos included in the win32 module:
>
> import win32service
> import win32con
>
>
> def EnumServices():
>     resume = 0
>     accessSCM = win32con.GENERIC_READ
>     accessSrv = win32service.SC_MANAGER_ALL_ACCESS
>
>     #Open Service Control Manager
>     hscm = win32service.OpenSCManager(None, None, accessSCM)
>
>     #Enumerate Service Control Manager DB
>
>     typeFilter = win32service.SERVICE_WIN32
>     stateFilter = win32service.SERVICE_STATE_ALL
>
>     statuses = win32service.EnumServicesStatus(hscm, typeFilter, stateFilter)
>     for (short_name, desc, status) in statuses:
>         print short_name, desc, status



From MrJean1 at gmail.com  Wed Jan 17 21:36:43 2007
From: MrJean1 at gmail.com (MrJean1)
Date: 17 Jan 2007 18:36:43 -0800
Subject: Asyncore select statement problem
In-Reply-To: <1169075120.491855.103200@q2g2000cwa.googlegroups.com>
References: <1169075120.491855.103200@q2g2000cwa.googlegroups.com>
Message-ID: <1169087803.896785.110630@s34g2000cwa.googlegroups.com>

Try using another ascyncore example and see if that works for you.
Maybe, first one without threading, like


<http://effbot.org/lib/asyncore.html#asyncore-example-basic-http-client>

Asyncore worked fine on my application on Linux, but haven't tried that
on MacOS.

/Jean Brouwers



JamesHoward wrote:
> I have a problem with python's asyncore module throwing a bad file
> descriptor error.  The code might be difficult to copy here, but the
> problem is essentially:
>
> The server wants to sever the connection of an open Asyncore socket.
> Calling the socket.close() nor the socket.shutdown(2) calls seem to
> work.  The only way I can close the connection without creating the
> error below is to have the client close the connection.
>
> I have the asyncore.loop() as the last line of a thread that is spawned
> within the applications "mainframe.py" or gui thread.  It doesn't seem
> to me like this would make a difference, but I am unfamiliar with the
> specifics of how the asyncore module works.
>
> Any thoughts people have would be greatly appreciated.  If needed I may
> be able to create a small version of the problem to post for people to
> see.
>
> Thanks,
> Jim Howard
>
>
> Exception in thread Thread-1:
> Traceback (most recent call last):
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/threading.py",
> line 460, in __bootstrap
>     self.run()
>   File
> "/Users/jwhoward2/Documents/Projects/LJServer/LJDeviceServer/DeviceServer.py",
> line 23, in run
>     asyncore.loop()
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/asyncore.py",
> line 191, in loop
>     poll_fun(timeout, map)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/asyncore.py",
> line 121, in poll
>     r, w, e = select.select(r, w, e, timeout)
> error: (9, 'Bad file descriptor')



From jdvolz at gmail.com  Thu Jan 18 03:21:08 2007
From: jdvolz at gmail.com (jdvolz at gmail.com)
Date: 18 Jan 2007 00:21:08 -0800
Subject: urllib2 and transfer-encoding = chunked
Message-ID: <1169108468.497013.228520@l53g2000cwa.googlegroups.com>

I am having errors which appear to be linked to a previous bug in
urllib2 (and urllib) for v2.4 and v2.5 of Python.  Has this been fixed?
 Has anyone established a standard workaround?  I keep finding old
posts about it, that basically give up and say "well it's a known bug."
 Any help would be greatly appreciated.



From nmm1 at cus.cam.ac.uk  Thu Jan 25 16:17:19 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 25 Jan 2007 21:17:19 GMT
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
	<ep9t4g$uf$1@gemini.csx.cam.ac.uk>
	<1169751828.986583.47200@j27g2000cwj.googlegroups.com>
	<epb0s7$g2s$1@gemini.csx.cam.
Message-ID: <epb6ov$rdd$1@gemini.csx.cam.ac.uk>


In article <1169754601.992058.205640 at q2g2000cwa.googlegroups.com>,
"Paddy" <paddy3118 at netscape.net> writes:
|> 
|> No, you should think of the service that needs to be up. You seem to be
|> talking about how it can't be fixed rather than looking for ways to
|> keep things going. A little learning is fine but "it can't
|> theoretically be fixed" is no solution.

I suggest that you do invest in a little learning and look up Poisson
processes.

|> Keep your eye on the goal and your more likely to score!

And, if you have your eye on the wrong goal, you would generally be
better off not scoring :-)


Regards,
Nick Maclaren.


From ptmcg at austin.rr._bogus_.com  Thu Jan 11 09:31:48 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 11 Jan 2007 08:31:48 -0600
Subject: Type casting a base class to a derived one?
References: <mailman.2571.1168518354.32031.python-list@python.org>
	<eo5bia$re6$00$1@news.t-online.com>
Message-ID: <45a64a53$0$16752$4c368faf@roadrunner.com>


"Peter Otten" <__peter__ at web.de> wrote in message 
news:eo5bia$re6$00$1 at news.t-online.com...
> Frederic Rentsch wrote:
>
>>    If I derive a class from another one because I need a few extra
>> features, is there a way to promote the base class to the derived one
>> without having to make copies of all attributes?
>>
>> class Derived (Base):
>>    def __init__ (self, base_object):
>>       # ( copy all attributes )
>>       ...
>>
>> This looks expensive. Moreover __init__ () may not be available if it
>> needs to to something else.
>
> base_instance = Base(...)
> base_instance.__class__ = Derived
>
> Peter

This will change the class-level behavior of the object, but it wont 
automagically populate the instance with any attributes that are 
specifically added in Derived's __init__.

class A(object):
    def __init__(self,x):
        self.x = x
    def method(self):
        print "I am an A whose x value is", self.x

class B(A):
    bb = 1000
    def __init__(self,x,y):
        super(B,self).__init__(x)
        self.y = y
    def method(self):
        print "I am a B whose x value is", self.x

aobj = A(100)
aobj.method()
aobj.__class__ = B
aobj.method()
print aobj.bb
print aobj.y

prints:
I am an A whose x value is 100
I am a B whose x value is 100
1000
Traceback (most recent call last):
  File "dertest.py", line 20, in ?
    print aobj.y
AttributeError: 'B' object has no attribute 'y'


But it wouldn't be hard to write a makeBaseIntoDerived method:

def makeAintoB(a,y=0):
    a.y = y
    a.__class__ = B

-- Paul 




From noway at ask.me  Wed Jan 24 09:02:19 2007
From: noway at ask.me (Giovanni Bajo)
Date: Wed, 24 Jan 2007 15:02:19 +0100
Subject: Missing .dlls when installing PyQt!? :(
In-Reply-To: <1169645779.368746.157750@l53g2000cwa.googlegroups.com>
References: <1169645779.368746.157750@l53g2000cwa.googlegroups.com>
Message-ID: <LFJth.20280$bH4.18090@tornado.fastwebnet.it>

On 24/01/2007 14.36, wd.jonsson at gmail.com wrote:

> I must be doing something wrong here because I'm getting all these
> missing .dll messages after installing PyQT. This is what I've done (no
> step excluded):
> 
> 1. Fresh installation of Python25
> 2. I run the PyQt-gpl-4.1.1-Py2.5-Qt4.2.2.exe file which should include
> SIP
> 3. I run the qt-win-opensource-4.2.2-mingw.exe file
> 4. I try to launch the C:\Program
> Files\PyQt4\examples\tools\qtdemo\qtdemo.pyw file
> 
> Result:
> Error message says: Can't find mingwm10.dll
> 
> After searching for the file I found it in the C:\Qt\4.2.2\bin
> directory. I copied the dll to the windows dir just to run in to the
> next missing dll error (QtCore4.dll) which is also located in the same
> directory. What have I missed? I've been trying to install QT for 6
> hours now...

Add C:\Qt\4.2.2\bin to your PATH.
-- 
Giovanni Bajo


From michele.simionato at gmail.com  Tue Jan 16 11:21:34 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 16 Jan 2007 08:21:34 -0800
Subject: arguments of a function/metaclass
In-Reply-To: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>
References: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>
Message-ID: <1168964489.326155.169680@l53g2000cwa.googlegroups.com>

rubbishemail at web.de wrote:
> Hello,
>
>
> I have a member function with many (20) named arguments
>
> def __init__(self,a=1,b=2):
>     self.a=a
>     self.b=b
>
> I would like to get rid of the many redundant lines like self.a=a and
> set the members automatically.
> The list of default arguments could be given like
>
> def __init__(**kwargs):
>     arglist={"a":1,"b":2]
>
> if this makes things easier
>
> Of course there has to be a check that raises an error in case of an
> unknown argument not mentioned in this list.
>
>
> I am sure there is an elegant way how to do this, could you give me any
> hints???
>

def __init__(self, **kw):
    vars(self).update(kw)


                   Michele Simionato



From goodepic at gmail.com  Fri Jan  5 16:44:26 2007
From: goodepic at gmail.com (goodepic)
Date: 5 Jan 2007 13:44:26 -0800
Subject: Problem Running Working Code on Mac
In-Reply-To: <1168030884.878349.119950@38g2000cwa.googlegroups.com>
References: <1167946511.531632.41750@11g2000cwr.googlegroups.com>
	<w3fnh.11876$Du.9197@newsfe15.lga>
	<1168030884.878349.119950@38g2000cwa.googlegroups.com>
Message-ID: <1168033466.497889.243300@s34g2000cwa.googlegroups.com>

I got pgdb installed right, so I've got no more warnings.  Otherwise
the output is exactly the same as quoted above!!



From gagsl-py at yahoo.com.ar  Wed Jan 10 05:35:11 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 10 Jan 2007 07:35:11 -0300
Subject: convert binary data to int
In-Reply-To: <1168424278.193439.216770@k58g2000hse.googlegroups.com>
References: <1168424278.193439.216770@k58g2000hse.googlegroups.com>
Message-ID: <7.0.1.0.0.20070110073244.03fe7488@yahoo.com.ar>

At Wednesday 10/1/2007 07:17, rubbishemail at web.de wrote:

>I need to convert a 3 byte binary string like
>"\x41\x00\x00" to 3 int values ( (65,0,0) in this case).
>The string might contain characters not escaped with a \x, like
>"A\x00\x00"

py> [ord(x) for x in "\x41\x00\x00"]
[65, 0, 0]
py> [ord(x) for x in "A\x00\x00"]
[65, 0, 0]
py> "\x41\x00\x00" == "A\x00\x00"
True
py> "\x41\x00\x00" is "A\x00\x00"
True

(The last test is actually irrelevant, however)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From mail at microcorp.co.za  Fri Jan 12 01:12:03 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 12 Jan 2007 08:12:03 +0200
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org><50fudtF1g1nplU1@mid.individual.net><envur1$rq1$1@gemini.csx.cam.ac.uk><mailman.2480.1168350033.32031.python-list@python.org><Xns98B384E126F4Ctim111one@216.196.97.136><eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136>
	<eo539l$t3b$1@gemini.csx.cam.ac.uk>
Message-ID: <009301c73610$944d0280$03000080@hendrik>

"Nick Maclaren" <nmm1 at cus.cam.ac.uk> wrote:

> Yes, but that wasn't their point.  It was that in (say) iterative
> algorithms, the error builds up by a factor of the base at every step.
> If it wasn't for the fact that errors build up, almost all programs
> could ignore numerical analysis and still get reliable answers!
> 
> Actually, my (limited) investigations indicated that such an error
> build-up was extremely rare - I could achieve it only in VERY artificial
> programs.  But I did find that the errors built up faster for higher
> bases, so that a reasonable rule of thumb is that 28 digits with a decimal
> base was comparable to (say) 80 bits with a binary base.
> 

I would have thought that this sort of thing was a natural consequence
of rounding errors - if I round (or worse truncate) a binary, I can be off
by at most one, with an expectation of a half of a least significant digit,
while if I use hex digits, my expectation is around eight, and for decimal
around five...

So it would seem natural that errors would propagate 
faster on big base systems, AOTBE, but this may be 
a naive view.. 

- Hendrik



From nagle at animats.com  Wed Jan 24 12:15:04 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 24 Jan 2007 17:15:04 GMT
Subject: Python does not play well with others
In-Reply-To: <xqxirex3psq.fsf@cola3.ca.boeing.com>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<xqxirex3psq.fsf@cola3.ca.boeing.com>
Message-ID: <suMth.75341$wP1.17392@newssvr14.news.prodigy.net>

Harry George wrote:
> John Nagle <nagle at animats.com> writes:

> You experience isn't shared by everyone.  Some of us find Python the
> most functional and portable of the candidates you mention.

    The language is fine.  It's the bindings to other packages that
are the problem.  There are three different packages for talking
to OpenSSL, and they're all broken in some important way.

    What's actually needed on the SSL side, I think, is to
add bindings to the built-in SSL to export the functionality
the M2Crypto C binding module has.  Preferably with better
attention to reference count problems, and without using SWIG.
Then move over the Python portions of M2Crypto.

    Some problems, all of which are known and logged bugs:

    - The built in SSL package doesn't actually validate anything,
	and will happily accept bogus SSL certificates.
    - The built in SSL package doesn't allow access to most of the
	fields of an SSL certificate, and the ones you can get
	are returned in a debug format that's not parseable.
    - M2Crypto has OpenSSL and SWIG version dependencies beyond
	what is documented.  The latest version of SWIG has
	a problem which breaks builds with older versions of
	OpenSSL.
    - M2Crypto may still have a memory leak associated with contexts.
	(Check out "close" in "Context".)
    - M2Crypto doesn't understand SSL certificates which support
	a list of sites.
    - M2Crypto and the socket library don't play nice about timeouts.

Most of these problems have been known for years.  The last person to
try to fix this was treated so badly he stopped contributing.  Read
the bug history for "[1114345] Add SSL certificate validation".
It's sad.

				John Nagle


From gagsl-py at yahoo.com.ar  Tue Jan  9 14:24:11 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 09 Jan 2007 16:24:11 -0300
Subject: private variables
In-Reply-To: <D2F0235E-9106-411E-9122-E6030C674852@cs.hmc.edu>
References: <74E534EE-D260-409D-8E91-0182BB897B94@cs.hmc.edu>
	<45A331FE.90509@gmx.net>
	<D2F0235E-9106-411E-9122-E6030C674852@cs.hmc.edu>
Message-ID: <7.0.1.0.0.20070109162039.00fd0770@yahoo.com.ar>

At Tuesday 9/1/2007 04:38, belinda thom wrote:

>I knew it was a beehive, but I had hoped someone would know which
>version they were released, so I can put the proper statement into my
>tutorial (e.g. In version <foo>, Python provided some support for
>private variables...). I've been avoiding getting stung b/c I see
>both sides and have no preference for one vs. the other.

1.5, but I doubt anyone is still using a version earlier than 1.52 anymore.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From rweth at cisco.com  Sat Jan  6 14:03:33 2007
From: rweth at cisco.com (rweth)
Date: Sat, 06 Jan 2007 11:03:33 -0800
Subject: nntplib downloads content with extra linebreaks
Message-ID: <1168110213.436860@sj-nntpcache-1.cisco.com>

I am using nntplib to download archived xml messages from our internal 
newsgroup. This is working fine except the download of files  to the 
connected server, has extra embedded
lines in them (all over the place), from the
   s.body(id,afile)  # body method

Is there any way to employ this library to strip out these extra
line breaks? I know this may seem trivial but they cause serious
issues when I try and employ the subsequent downloaded xml file
for a series of processes.

When I forward one of these files from Thunderbird (via the newsgroup)
to outlook and open it up, and then select  "ignore extra line breaks",
and cut and paste the content .. all is well. The file is "healed".

Apart from being just a plain annoyance (all this manual steps) it 
really bothers me something this trivial (the pretty-fication of 
content) would  throw me out of whack so badly .. also that outlook has 
some simple method that magically does what I need and I cannot hack it 
for myself. (not to mention how brittle
the xml processing we must have in place is .. )

First I thought it was a  call to RFC 977(or below)  which I cannot work 
out, but which does the deed! But then I though that the content of the 
forwarded msg has something in it which outlook can filter ..
because the forwarded msg is encapsulated, and likely cut off from the 
news server.
(what do I know these are guesses)


From tjgolden at gmail.com  Fri Jan 26 09:49:25 2007
From: tjgolden at gmail.com (Tim Golden)
Date: 26 Jan 2007 06:49:25 -0800
Subject: Win XP "Sleep" mode: can Py wake up?
In-Reply-To: <mailman.3195.1169822579.32031.python-list@python.org>
References: <mailman.3195.1169822579.32031.python-list@python.org>
Message-ID: <1169822965.152810.317940@q2g2000cwa.googlegroups.com>

> Does anyone have any experience having python deal with sleep mode?  I'd
> love to run something that would hear a sleep event coming and pickle
> some data before sleep, then after coming out of sleep, unpickle...

It should, in theory, be possibly by trapping the WMI
Win32_PowerManagementEvent event. I haven't time
to try it out at the moment, unfortunately. Alternatively,
the WM_POWERBROADCAST message looks hopeful
if you wanted to go the Message Loop route.

TJG



From moin at blackhole.labs.rootshell.ws  Tue Jan 16 18:28:15 2007
From: moin at blackhole.labs.rootshell.ws (S.Mohideen)
Date: Tue, 16 Jan 2007 17:28:15 -0600
Subject: POSH Query
Message-ID: <20070116172815.2c75c30f.moin@blackhole.labs.rootshell.ws>


Hi Folks,
                I am implementing a multithreaded Network application in Python. As most of you know that the GIL hinders the performance scalablity in SMP machines. I came across POSH. Here they talk about multiple instances of Python Interpreter sticking around a Shared memory , bypassing the GIL effect.  Is anybody tried the POSH - does it really increases the performance ?? How good or bad is to have the POSH module imported into ones Python code. Please share your experience, if any, about POSH.

Cheers
Moin

-- 
S.Mohideen <moin at blackhole.labs.rootshell.ws>


From rodperson at comcast.net  Fri Jan 19 18:34:21 2007
From: rodperson at comcast.net (Rod Person)
Date: Fri, 19 Jan 2007 18:34:21 -0500
Subject: Help with creating processes
Message-ID: <20070119183421.04311f34@atomizer.opensourcebeef.net>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

I'm trying to create a simple gui wrapper for the handbrake dvd ripper
with python 2.4 on a FreeBSD system.

My problem is this. I want to scan the dvd to see all the titles and
chapters. The handbrake command for this is:

	handbrake -i /dev/acd0 -t 0

I've tried:
	 cmd = '/usr/local/bin/handbrake -i /dev/acd0 -t 0'
    	 rtn = os.popen(cmd)

but the script exists before the disk has finished scanning. If I
change cmd to 'ls' it work as I expected. My problem is that the
scanning of the DVD can take upto a minute or more and os.popen doesn't
seem to wait - although I thought it was suppose to?

I've tried using subprocess.call and popen2 etc but nothing seems to
wait for the return. Can someone give me a hint?


- -- 


Rod

"it takes an unusual mind to see the obvious."
- - Alfred Whitehead


-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (FreeBSD)

iD8DBQFFsVWA3rDijyy3LEcRAia4AJ4hWZosgDeFeK4dkKdMg9ZwmAebeACfVqkQ
pGiJ7pL1/d1tVszxF0kzSjQ=
=Jz9+
-----END PGP SIGNATURE-----

From theller at ctypes.org  Wed Jan  3 16:07:59 2007
From: theller at ctypes.org (Thomas Heller)
Date: Wed, 03 Jan 2007 22:07:59 +0100
Subject: M. Hammonds python panel
In-Reply-To: <1167856840.117284.78420@k21g2000cwa.googlegroups.com>
References: <1167856840.117284.78420@k21g2000cwa.googlegroups.com>
Message-ID: <enh5vf$t04$1@sea.gmane.org>

jUrner at arcor.de schrieb:
> Hello all
> 
> I am a great fan of Mark Hammonds python pannel. But since starship
> went down it didn't come up again ...with the link in my favs to
> http://starship.python.net/crew/mhammond/mozilla/pythonpanel.xul
> still pointing nowhere.
> 
> Maybe Mark is around here somewhere...

It may be better to mail him directly.  You should be able to find his
email address.

Thomas



From olsongt at verizon.net  Mon Jan  8 15:29:36 2007
From: olsongt at verizon.net (olsongt at verizon.net)
Date: 8 Jan 2007 12:29:36 -0800
Subject: Execute binary code
In-Reply-To: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
Message-ID: <1168288176.054142.232780@s80g2000cwa.googlegroups.com>


citronelu at yahoo.com wrote:
> Is it possible to execute a binary string stored within a python script
> as executable code ?
>
> The script is run under Windows, and the binary code (a full executable
> file) is stored in a variable in the script.
>
> I know I can use os.system() or os.popen() to run an external file, but
> these functions take as argument a string evaluated as command-line.
>
> I also know I could save the binary code as a temporary file, execute
> it and delete it afterwards, but this is not an alternative.
>
> Thanks.

It's not impossible, that's basically what I did on a smaller scale in
pyasm:

http://mysite.verizon.net/olsongt/

A small C-stub executes arbirary asm that was originally built as a
string.  The tough part for you would be loading all of the referenced
.dlls into memory and patching in all the relocations from the source
COFF file.  It'll be a pain but not entirely impossible.



From paddy3118 at netscape.net  Fri Jan 26 04:24:39 2007
From: paddy3118 at netscape.net (Paddy)
Date: 26 Jan 2007 01:24:39 -0800
Subject: The reliability of python threads
In-Reply-To: <epcg7s$gal$1@gemini.csx.cam.ac.uk>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
	<ep9t4g$uf$1@gemini.csx.cam.ac.uk>
	<1169751828.986583.47200@j27g2000cwj.googlegroups.com>
	<epb0s7$g2s$1@gemini.csx.cam.ac.uk>
	<epcg7s$gal$1@gemini.csx.cam.ac.uk>
Message-ID: <1169803479.668543.228510@q2g2000cwa.googlegroups.com>



On 26 Jan, 09:05, n... at cus.cam.ac.uk (Nick Maclaren) wrote:
> In article <mailman.3176.1169771514.32031.python-l... at python.org>,s... at pobox.com writes:|>
> |> What makes you think Paddy indicated he wouldn't try to solve the problem?
> |> Here's what he wrote:
> |>
> |>     What I'm proposing is that if, for example, a process stops running
> |>     three times in a year at roughly three to four months intervals , and it
> |>     should have stayed up; then restart the server sooner, at aa time of
> |>     your choosing, whilst taking other measures to investicate the error.
> |>
> |> I see nothing wrong with trying to minimize the chances of a problem rearing
> |> its ugly head while at the same time trying to investigate its cause (and
> |> presumably solve it).
>
> No, nor do I, but look more closely.  His quote makes it quite clear that
> he has got it firmly in his mind that this is a degradation problem, and
> so regular restarting will improve the reliability.  Well, it could also
> be one where failure becomes LESS likely the longer the server stays up
> (i.e. the "settling down" problem).

 If in the past year the settling down problem did not rear its head
when the server crashed after three to four months and was restarted,
then why not implement a regular ,  notified, downtime  - whilst also
looking into the problem in more depth?

* You are already having to restart.
* restarts last for 3-4 months.
Why burden yourself with "Oh but it could fail once in three hours,
you've not prooved that it can't, we'll have to stop everything whilst
we do a thorough investigation. Is it Poisson? Is it 'settling down'?
Just wait whilst I prepare my next doctoral thesis... "

- Okay, the last was extreme. but cathartic :-)
>
> No problem is as hard to find as one where you are firmly convinced that
> it is somewhere other than where it is.
Amen!
> 
> Regards,
> Nick Maclaren.
- Paddy.



From horpner at yahoo.com  Fri Jan 12 11:02:28 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 12 Jan 2007 17:02:28 +0100
Subject: Matching Directory Names and Grouping Them
References: <1168554244.459131.190440@k58g2000hse.googlegroups.com>
	<mailman.2605.1168555761.32031.python-list@python.org>
	<1168558702.851290.230100@i56g2000hsf.googlegroups.com>
Message-ID: <slrneqfcdj.1o0.horpner@FIAD06.norwich.edu>

On 2007-01-11, J <wilder.usenet at gmail.com> wrote:
> Steve-
>
> Thanks for the reply. I think what I'm trying to say by similar
> is pattern matching. Essentially, walking through a directory
> tree starting at a specified root folder, and returning a list
> of all folders that matches a pattern, in this case, a folder
> name containing a four digit number representing year and a
> subdirectory name containing a two digit number representing a
> month. The matches are grouped together and written into a text
> file. I hope this helps.

Here's a solution using itertools.groupby, just because this is
the first programming problem I've seen that seemed to call for
it. Hooray!

from itertools import groupby

def print_by_date(dirs):
    r""" Group a directory list according to date codes.

    >>> data = [
    ...     "<root>/Input2/2002/03/",
    ...     "<root>/Input1/2001/01/",
    ...     "<root>/Input3/2005/05/",
    ...     "<root>/Input3/2001/01/",
    ...     "<root>/Input1/2002/03/",
    ...     "<root>/Input3/2005/12/",
    ...     "<root>/Input2/2001/01/",
    ...     "<root>/Input3/2002/03/",
    ...     "<root>/Input2/2005/05/",
    ...     "<root>/Input1/2005/12/"]
    >>> print_by_date(data)
    <root>/Input1/2001/01/
    <root>/Input2/2001/01/
    <root>/Input3/2001/01/
    <BLANKLINE>
    <root>/Input1/2002/03/
    <root>/Input2/2002/03/
    <root>/Input3/2002/03/
    <BLANKLINE>
    <root>/Input2/2005/05/
    <root>/Input3/2005/05/
    <BLANKLINE>
    <root>/Input1/2005/12/
    <root>/Input3/2005/12/
    <BLANKLINE>

    """
    def date_key(path):
        return path[-7:]
    groups = [list(g) for _,g in groupby(sorted(dirs, key=date_key), date_key)]
    for g in groups:
        print '\n'.join(path for path in sorted(g))
        print

if __name__ == "__main__":
    import doctest
    doctest.testmod()

I really wanted nested join calls for the output, to suppress
that trailing blank line, but I kept getting confused and
couldn't sort it out.

It would better to use the os.path module, but I couldn't find
the function in there lets me pull out path tails.

I didn't filter out stuff that didn't match the date path
convention you used.

-- 
Neil Cerutti


From parallelpython at gmail.com  Wed Jan 10 03:17:45 2007
From: parallelpython at gmail.com (parallelpython at gmail.com)
Date: 10 Jan 2007 00:17:45 -0800
Subject: Parallel Python
In-Reply-To: <mailman.2408.1168248992.32031.python-list@python.org>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
Message-ID: <1168417065.105920.319970@o58g2000hsb.googlegroups.com>

> I always thought that if you use multiple processes (e.g. os.fork) then
> Python can take advantage of multiple processors. I think the GIL locks
> one processor only. The problem is that one interpreted can be run on
> one processor only. Am I not right? Is your ppm module runs the same
> interpreter on multiple processors? That would be very interesting, and
> something new.
>
>
> Or does it start multiple interpreters? Another way to do this is to
> start multiple processes and let them communicate through IPC or a local
> network.

   That's right. ppsmp starts multiple interpreters in separate
processes and organize communication between them through IPC.

   Originally ppsmp was designed to speedup an existent application
which is written in pure python but is quite computationally expensive
(the other ways to optimize it were used too). It was also required
that the application will run out of the box on the most standard Linux
distributions (they all contain CPython).



From robert.kern at gmail.com  Tue Jan  9 14:38:51 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 09 Jan 2007 13:38:51 -0600
Subject: distutils and ctypes
In-Reply-To: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>
References: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>
Message-ID: <eo0r0n$ok4$1@sea.gmane.org>

jtravs at gmail.com wrote:

> So finally, my question is, is there a way to get distutils to simply
> build a shared library on windows so that I can use ctypes with them???

Not out-of-box, no. The OOF2 project has added a bdist_shlib command which
should do most of what you want, though. It's somewhat UNIX-oriented, and I
think it tries to install the shared library to a standard location (e.g.
/usr/local/lib). You might want to modify it to install the shared library in
the package so it is easy to locate at runtime.

  http://www.ctcms.nist.gov/oof/oof2/
  http://www.ctcms.nist.gov/oof/oof2/source/oof2-2.0.1.tar.gz

The code is in the shlib/ subdirectory.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From beej at beej.us  Tue Jan 30 15:48:06 2007
From: beej at beej.us (Beej)
Date: 30 Jan 2007 12:48:06 -0800
Subject: Help me understand this
In-Reply-To: <mailman.3318.1170179562.32031.python-list@python.org>
References: <op.tmy9z2d9sd1mbx@gabriel2.softlabbsas.com.ar>
	<mailman.3318.1170179562.32031.python-list@python.org>
Message-ID: <1170190086.432548.205830@s48g2000cws.googlegroups.com>

On Jan 30, 9:52 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
> A float is, too.  2.__add is a float followed by an identifier.
> Not legal.  As pointed out elsewhere in the thread, (2). forces
> it to be an integer followed by a ".".

Which leads to these two beauties:

>>> (2.).__add__(1)
3.0
>>> 2..__add__(1)
3.0

I like the second one more. :-)

-Beej




From PavPanchekha at gmail.com  Fri Jan 19 17:18:19 2007
From: PavPanchekha at gmail.com (Pavel Panchekha)
Date: 19 Jan 2007 14:18:19 -0800
Subject: How to comment code?
In-Reply-To: <eorfft$iud$1@zinnia.noc.ucla.edu>
References: <45b13876$0$323$e4fe514c@news.xs4all.nl>
	<eorfft$iud$1@zinnia.noc.ucla.edu>
Message-ID: <1169245099.852799.142840@38g2000cwa.googlegroups.com>

I think that doc strings are the most important way in which you should
be commenting on your code. Once the code works, you can elimainate
most inline comments, leaving only doc string for everything and a few
comments on some particularly confusing parts. Other than that,
comments usually only clutter Python code. But remember that you are
the person who understands your code best, so don't be too fanatical
about deleting inline comments.



From __peter__ at web.de  Thu Jan 25 05:40:40 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 25 Jan 2007 11:40:40 +0100
Subject: str and __setitem__
References: <Xns98C372B2DD26Btoreriknpolarno@129.242.5.222>
Message-ID: <epa1eg$q5v$01$1@news.t-online.com>

Tor Erik Soenvisen wrote:

> What do I need to do to make the code below work as expected:
> 
> class str2(str):
> 
> ????????def __setitem__(self, i, y):
> ????????????????assert type(y) is str
> ????????????????assert type(i) is int
> ????????????????assert i < len(self)
> 
> ????????????????self = self[:i] + y + self[1+i:]

'self' is a local variable; assigning to it rebinds it but has no effect
outside of the __setitem__() method.
 
> a = str2('123')
> a[1] = '1'
> print a
> 123

> The print statement should return 113

You have to start from scratch as a strings are "immutable" (once created,
their value cannot be changed).

>>> class mutable_str(object):
...     def __init__(self, value):
...             self._value = value
...     def __setitem__(self, index, value):
...             self._value = self._value[:index] + value +
self._value[index+1:]
...     def __str__(self):
...             return self._value
...
>>> a = mutable_str("123")
>>> a[1] = "x"
>>> print a
1x3

Peter


From fd.calabrese at gmail.com  Tue Jan  9 04:18:29 2007
From: fd.calabrese at gmail.com (cesco)
Date: 9 Jan 2007 01:18:29 -0800
Subject: recursive function
In-Reply-To: <mailman.2471.1168332172.32031.python-list@python.org>
References: <1168265240.294223.298750@s80g2000cwa.googlegroups.com>
	<1168277289.970128.44880@38g2000cwa.googlegroups.com>
	<mailman.2471.1168332172.32031.python-list@python.org>
Message-ID: <1168334309.507367.263290@v33g2000cwv.googlegroups.com>


Hendrik van Rooyen wrote:
> "cesco" <fd.calabrese at gmail.com> wrote:
>
> >
> > Neil Cerutti wrote:
> > > On 2007-01-08, cesco <fd.calabrese at gmail.com> wrote:
> > > > Hi,
> > > >
> > > > I have a dictionary of lists of tuples like in the following example:
> > > > dict = {1: [(3, 4), (5, 8)],
> > > >         2: [(5, 4), (21, 3), (19, 2)],
> > > >         3: [(16, 1), (0, 2), (1, 2), (3, 4)]]
> > > >
> > > > In this case I have three lists inside the dict but this number
> > > > is known only at runtime. I have to write a function that
> > > > considers all the possible combinations of tuples belonging to
> > > > the different lists and return a list of tuples of tuples for
> > > > which the sum of the first element of the most inner tuple is
> > > > equal to N.
> > > >
> > > > For example, assuming N = 24, in this case it should return:
> > > > [((3, 4), (5, 4), (16, 1)), ((3, 4), (21, 3), (0, 2)), ((5, 8), (19,
> > > > 2), (0, 2))]
> > >
> > > What do you mean by "most inner tuple"?
> > >
> > > > A simple list comprehension would be enough if only I knew the
> > > > number of keys/lists beforehand
> > >
> > > len(dict.keys()).
> >
> > What I mean is that the number of keys/lists is not known until runtime
> > and it changes randomly from time to time which means I would have to
> > write every time a different list comprehension (or a different number
> > of nested loops) to accomplish the same thing.
> > In the example the result of the search should be a list containing
> > three tuples each of which contains again three tuple (the most inner
> > tuples). If you consider the first element of each tuple the sum is 24
> > (like in 3+5+16, or 3+21+0 or 5+19+0).
> >
> > Any other help will be appreciated
>
>
> Is there any reliable structure in the data?
> - for instance in your example, the first list
> has two tuples, the second one three, and the
> third one four - Is this a pattern?

Hi Hendrik,

there is no such a pattern (I just happened to insert that ascending
number of lists). Anyway the answer from bearophileH... at lycos.com was
quite satisfactory:-)

regards
Cesco



From krw at att.bizzzz  Wed Jan 10 16:38:39 2007
From: krw at att.bizzzz (krw)
Date: Wed, 10 Jan 2007 16:38:39 -0500
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
	<N6Uoh.43209$wc5.29633@newssvr25.news.prodigy.net>
	<eo2t6h$8qk_014@s808.apx1.sbo.ma.dialup.rcn.com>
	<0001HW.C1CA63B1059BC980F0203648@news.verizon.net>
	<eo33rr$8ss_008@s1005.apx1.sbo.ma.dialup.rcn.com>
Message-ID: <MPG.200f26e6b5607c46989ef0@news.individual.net>

In article <eo33rr$8ss_008 at s1005.apx1.sbo.ma.dialup.rcn.com>, 
jmfbahciv at aol.com says...
> In article <0001HW.C1CA63B1059BC980F0203648 at news.verizon.net>,
>    Lefty Bigfoot <nunya at busyness.info> wrote:
> >On Wed, 10 Jan 2007 08:28:33 -0600, jmfbahciv at aol.com wrote
> >(in article <eo2t6h$8qk_014 at s808.apx1.sbo.ma.dialup.rcn.com>):
> >
> >> In article <N6Uoh.43209$wc5.29633 at newssvr25.news.prodigy.net>,
> >>    "Elan Magavi" <Elan at nomailnospam.com> wrote:
> >>> Is that like.. OctaPussy?
> >> 
> >> I didn't read their stuff.  Are they really trying to put a 
> >> round peg in a square hole?
> >
> >Sounds more like an octagonal pole in a round hole.
> 
> Nah, I figured they picked the word octal because it's never
> been used before.....

...and "HexaPussy" just wouldn't be right.

-- 
  Keith


From nmm1 at cus.cam.ac.uk  Sun Jan 14 06:55:59 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 14 Jan 2007 11:55:59 GMT
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org><50fudtF1g1nplU1@mid.individual.net><envur1$rq1$1@gemini.csx.cam.ac.uk><mailman.2480.1168350033.32031.python-list@python.org><Xns98B384E126F4Ctim111one@216.196.97.136><eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136><eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org><eo7kdf$a80$1@gemini.csx.cam.ac.uk
Message-ID: <eod5of$leu$1@gemini.csx.cam.ac.uk>


In article <mailman.2709.1168753952.32031.python-list at python.org>,
"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
|> > 
|> I would suspect that this is one of those questions which are simple
|> to ask, but horribly difficult to answer - I mean - if the hardware has 
|> thrown it away, how do you study it - you need somehow two
|> different parallel engines doing the same stuff, and comparing the 
|> results, or you have to write a big simulation, and then you bring 
|> your simulation errors into the picture - There be Dragons...

No.  You just emulate floating-point in software and throw a switch
selecting between the two rounding rules.


Regards,
Nick Maclaren.


From bearophileHUGS at lycos.com  Fri Jan 26 14:06:49 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 26 Jan 2007 11:06:49 -0800
Subject: A note on heapq module
In-Reply-To: <1169159235.864192.263210@v45g2000cwv.googlegroups.com>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<slrneqs4vp.b4s.apardon@rcpc42.vub.ac.be>
	<4Yidnf9NFKFm7jPYnZ2dnUVZ_u3inZ2d@comcast.com>
	<1169117876.063858.56570@s34g2000cwa.googlegroups.com>
	<8NSdnf38_otYcjLYnZ2dnUVZ_tadnZ2d@comcast.com>
	<1169159235.864192.263210@v45g2000cwv.googlegroups.com>
Message-ID: <1169838409.657590.275760@v45g2000cwv.googlegroups.com>

bearophile:
> I don't like your solution, this class was already slow enough. Don't
> use unbound methods with this class :-)

Sorry for raising this discussion after so much time. Another possibile
solution is to use the normal methods for the normal case, and replace
them only if key is present (this reduces problems with unbound methods
but you may use the wrong method).

Example:

def __init__(self, sequence=None, key=None, inplace=False):
    ...
    if key is None:
        ...
    else:
        ...
        self.pop = self.__pop_key

    ...
def pop(self):
    return heappop(self._heap)
def __pop_key(self):
    return heappop(self._heap)[2]


Someone else has done something similar:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/e61ba58c9722bf51/

http://sourceforge.net/tracker/index.php?func=detail&aid=1162363&group_id=5470&atid=305470

Bye,
bearophile



From richfahey at gmail.com  Thu Jan 11 14:27:13 2007
From: richfahey at gmail.com (Rich)
Date: 11 Jan 2007 11:27:13 -0800
Subject: passing a variable to an external program
In-Reply-To: <slrneqd3h7.144.horpner@FIAD06.norwich.edu>
References: <1168542633.290682.267570@77g2000hsv.googlegroups.com>
	<slrneqd3h7.144.horpner@FIAD06.norwich.edu>
Message-ID: <1168543633.441389.42200@i39g2000hsf.googlegroups.com>

Thank you, that did it.  I don't know why I didn't think to escape the
\ with \\.

On Jan 11, 2:18 pm, Neil Cerutti <horp... at yahoo.com> wrote:
> On 2007-01-11, Rich <richfa... at gmail.com> wrote:
>
> > I want to run an external program using os.system() but I want to
> > include a variable in the middle of the command line.
>
> > An example of the type of thing I want to be able to do:
> > pathname = os.path.dirname(sys.argv[0])
> > os.system('cscript /nologo ' + pathname + '\test.vbs')Use / instead of \, or \\ instead of \.
>
> --
> Neil Cerutti
> Ushers will eat latecomers. --Church Bulletin Blooper



From ptmcg at austin.rr._bogus_.com  Fri Jan 12 00:05:22 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 11 Jan 2007 23:05:22 -0600
Subject: Explanation about for loop
References: <1168577299.485773.8160@q2g2000cwa.googlegroups.com>
Message-ID: <45a71712$0$501$4c368faf@roadrunner.com>

"raghu" <vgvr620034 at gmail.com> wrote in message 
news:1168577299.485773.8160 at q2g2000cwa.googlegroups.com...
> can any one help me explaining for loop and its execution and its
> syntax with a simple example.
>
Bookmark this page: http://docs.python.org/ref/ref.html
"for loop" reference page: http://docs.python.org/ref/for.html
Bookmark this page: http://docs.python.org/tut/tut.html
"for loop" explanation: 
http://docs.python.org/tut/node6.html#SECTION006200000000000000000

Please avail yourself of one of the many online or hardcopy Python tutorial 
and reference resources.  If you are asking about for loops, you have a lot 
of basic ground to cover, more than is really suitable for newsgroup 
traffic.  Google for "python tutorial" should give you a good start.

-- Paul





From bjourne at gmail.com  Thu Jan 25 04:18:11 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Thu, 25 Jan 2007 10:18:11 +0100
Subject: Getting to an SSH account over a HTTP proxy
In-Reply-To: <ep2iou$r4n$1@news-int2.gatech.edu>
References: <mailman.2985.1169469575.32031.python-list@python.org>
	<51jt71F1k884hU1@mid.uni-berlin.de>
	<ep2iou$r4n$1@news-int2.gatech.edu>
Message-ID: <740c3aec0701250118x3160d8efm243769394f1ab1ef@mail.gmail.com>

On 1/22/07, Yu-Xi Lim <yuxi at ece.gatech.edu> wrote:
> He's referring to the HTTP CONNECT method, which can tunnel arbitrary
> TCP connections, not just HTTP. The IETF draft for this is titled
> "Tunneling TCP based protocols through Web proxy servers".
>
> AFAIK, there are no Python modules which support that. The protocol
> itself is fairly simply though, so it shouldn't be too hard to write
> your own wrapper or proxy for the client side. Things get a little more
> complicated if you have to authenticate with the proxy first.

The proxy in question requires authentication. Do you mean that I
should be able to write something that handles the communication to
the proxy and then run a library like paramiko "over that"? I have no
idea how to do that.

-- 
mvh Bj?rn


From steve at REMOVEME.cybersource.com.au  Sun Jan 28 22:05:24 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Mon, 29 Jan 2007 14:05:24 +1100
Subject: Convert from unicode chars to HTML entities
Message-ID: <pan.2007.01.29.03.05.23.166735@REMOVEME.cybersource.com.au>

I have a string containing Latin-1 characters:

s = u"? and many more..."

I want to convert it to HTML entities:

result =>
"&copy; and many more..."

Decimal/hex escapes would be acceptable:
"&#169; and many more..."
"&#xA9; and many more..."

I can look up tables of HTML entities on the web (they're a dime a
dozen), turn them into a dict mapping character to entity, then convert
the string by hand. Is there a "batteries included" solution that doesn't
involve reinventing the wheel?


-- 
Steven D'Aprano 




From petri.savolainen at iki.fi  Tue Jan  9 18:13:23 2007
From: petri.savolainen at iki.fi (Petri Savolainen)
Date: Wed, 10 Jan 2007 01:13:23 +0200
Subject: [ANN] win32 binaries for zope.interface 3.3.0
Message-ID: <eo17j8$73n$1@sea.gmane.org>

Both eggs and installers (exe) are available for Python 2.4 & 2.5 from:

http://www.zope.org/Members/saffe/zope_interface/folder_contents

Compiled on winxp pro using mingw32 "current".

Cheers,

  Petri



From mhellwig at xs4all.nl  Fri Jan  5 12:50:15 2007
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Fri, 05 Jan 2007 18:50:15 +0100
Subject: Adding a directory to the Python System Path - Edit the registry?
In-Reply-To: <1168017552.010631.276080@s34g2000cwa.googlegroups.com>
References: <1168017552.010631.276080@s34g2000cwa.googlegroups.com>
Message-ID: <459e8fa5$0$335$e4fe514c@news.xs4all.nl>

redefined.horizons at gmail.com wrote:
> I have been trying to find a way to add a directory to Python's sytem
> path on my MS Windows XP computer. I did some searching online, but the
> only solution I found involved editing the MS Windows Registry. That
> seemed a little to hard core. Is there another easier way to do this?
> 
> Thanks,
> 
> Scott Huey
> 

Take a look at:
http://docs.python.org/tut/node8.html

Specifically 6.1.1 and 6.2, perhaps that might answer your question.

Cheers

-- 
mph


From george.sakkis at gmail.com  Wed Jan  3 15:24:18 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 3 Jan 2007 12:24:18 -0800
Subject: Sorting on multiple values, some ascending, some descending
References: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
Message-ID: <1167855858.102690.265680@q40g2000cwq.googlegroups.com>

dwelden wrote:

> I have successfully used the sort lambda construct described in
> http://mail.python.org/pipermail/python-list/2006-April/377443.html.
> However, how do I take it one step further such that some values can be
> sorted ascending and others descending? Easy enough if the sort values
> are numeric (just negate the value), but what about text?

You got already some good replies; here's yet another less-than-optimal
way:

class revstr(str):
    def __lt__(self, other):
        return str.__gt__(self,other)
    def __gt__(self, other):
        return str.__lt__(self,other)

L.sort(key=lambda i: (i.somestring, revstr(i.someotherstring),
i.anotherkey))


George



From nmm1 at cus.cam.ac.uk  Mon Jan  8 13:03:01 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 8 Jan 2007 18:03:01 GMT
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk> <entj5d$o4$1@south.jnrs.ja.net>
	<entkru$2vs$1@gemini.csx.cam.ac.uk>
	<50f5snF1fb5uqU2@mid.individual.net>
	<entpo0$d0g$1@gemini.csx.cam.ac.uk>
	<50fdf9F1fki7dU3@mid.individual.net>
Message-ID: <enu10l$s03$1@gemini.csx.cam.ac.uk>


In article <50fdf9F1fki7dU3 at mid.individual.net>,
Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:
|> 
|> > The use of different precisions for the two cases is not, however,
|> > and it is that I was and am referring to.
|> 
|> You mistake "precision" with "display". 

Not at all.  "Precision" has been used to indicate the number of digits
after the decimal point for at least 60 years, probably 100; in 40 years
of IT and using dozens of programming languages, I have never seen
"display" used for that purpose.


Regards,
Nick Maclaren.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Jan 11 12:20:42 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 11 Jan 2007 18:20:42 +0100
Subject: what is the idiom for copy lots of params into self?
References: <1168469214.452389.221180@p59g2000hsd.googlegroups.com>
	<1168481112.291651.89300@i39g2000hsf.googlegroups.com>
	<1168520386.457345.23680@i39g2000hsf.googlegroups.com>
Message-ID: <50n9vaF1g30l4U3@mid.individual.net>

Emin wrote:

> Thanks for your suggestions. One issue with using *args or **kw is
> that I might no want to copy all the arguments to __init__ into
> self.

Try prepending something like

allowedParms = ("spam", "eggs", "yum")
args = dict([key,val for key,val in args.elements() if key in
allowedParms])

Regards,


Bj?rn

-- 
BOFH excuse #64:

CPU needs recalibration



From stefan.behnel-n05pAM at web.de  Mon Jan  8 10:10:09 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 08 Jan 2007 16:10:09 +0100
Subject: Module to read svg
In-Reply-To: <1168225193.883421.185140@s80g2000cwa.googlegroups.com>
References: <1168225193.883421.185140@s80g2000cwa.googlegroups.com>
Message-ID: <45a25ed2$0$18840$9b4e6d93@newsspool4.arcor-online.net>

schpok at gmail.com wrote:
> I'm looking for a module to load an SVG document so that I can read out
> its contents in some graphics-centric way. For example, path elements
> store their vertices in a long attribute string you need to parse. An
> ideal module would get me these vertices in a list.
> 
> SVGdraw seems to only write, but not read.
> 
> I'm interested in a pretty simple subset of the actual spec, where SVG
> Tiny is sufficient. W3C's python spec seems just what I want:
> http://www.w3.org/TR/SVGMobile12/python-binding.html
> 
> Does anyone know if there's an actual free implementation of this?
> Before I start salvaging out code from Skencil, is there anything else
> I might look at?

Check out XIST, it seems to have some kind of SVG support.

http://www.livinglogic.de/Python/xist/
http://mail.python.org/pipermail/xml-sig/2004-June/010325.html

In case you still end up wanting to write something yourself, you might
consider lxml's namespace implementation feature a good starting point.

http://codespeak.net/lxml/element_classes.html

Stefan


From steve at REMOVEME.cybersource.com.au  Wed Jan 31 21:35:09 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 01 Feb 2007 13:35:09 +1100
Subject: parent-child object design question
References: <1170136965.015119.225920@q2g2000cwa.googlegroups.com>
	<mailman.3297.1170139632.32031.python-list@python.org>
	<1170220553.843010.258260@a34g2000cwb.googlegroups.com>
	<pan.2007.01.31.07.24.21.793319@REMOVEME.cybersource.com.au>
	<mailman.3341.1170234961.32031.python-list@python.org>
	<1170284969.902118.155570@l53g2000cwa.googlegroups.com>
Message-ID: <pan.2007.02.01.02.35.08.769193@REMOVEME.cybersource.com.au>

On Wed, 31 Jan 2007 15:09:29 -0800, manstey wrote:

> Thanks for your input. Here is my next version, which works very well,
> but for one problem I explain below:
> 
> class CacheProperty(object):
>     def __init__(self, insCacheClass, name):
>         self.Name = name
>         self._bind_to_parent(insCacheClass)
>         self.__parent = insCacheClass
>         self.__pyValue = self.__parent.get(name)
> 
>     def _bind_to_parent(self, parent):
>         setattr(parent, self.Name, self)
> 
>     def get(self):
>         return self.__pyValue
> 
>     def set(self, val):
>         self.__parent.set(self.Name, val)
>         self.__pyValue = val # Set in wrapper's copy
> 
>     Value = property(get, set)
> 
>     def __repr__(self):
>         return str(self.Value)
>     def __str__(self):
>         return str(self.Value)
> 
> 
> class CacheClass(object):
>     def __init__(self, obj):
>         self.__data = obj
> 
>     def getOref(self):
>         return self.__data

That's pointless. Just get rid of the double-underscores and let the
caller refer to self.data directly.

>     def __repr__(self):
>         return 'self.__data'

What's the purpose of this? Why do completely different instances of
CacheClass have exactly the same repr?


>     def __str__(self):
>         return str(self.__data)

Pointless, because __getattr__ will have the same effect: if __str__
doesn't exist, __getattr__ will call getattr(self.__data, "__str__") which
is equivalent to str(self.__data).


>     def __getattr__(self, attr):
>         return getattr(self.__data, attr)

Straight-forward delegation to self.__data. As near as I can see,
CacheClass(oref) essentially does nothing different to just oref. So why
wrap oref in another class? What's the purpose of this? Why not just refer
to oref in the first place?

What makes this a "cache" class? It doesn't seem to act anything like a
cache to me. It seems to be just a wrapper around oref that doesn't really
do anything.


> Our code works fine as follows (oref is in-memory version of Cache oo-
> dbase class, and is an old-style class that comes with set and get and
> run_obj_method methods):
>>>> insCacheClass = CacheClass(oref)
>>>> insCacheProperty = CacheProperty(insOref,'Chapter')

What is insOref and where does it come from? Is it different from oref?

Your classes are confusing, but I feel that all of the above is just a
big, complicated way of saying something like this:

insOref = something_or_other
insOref.some_name = insOref

and then jumping through all sorts of hoops writing this:

insOref.some_name.attribute

instead of just insOref.attribute


That's what it seems like to me. Have I missed something?


>>>> print insOref.Chapter.Value
> 5
>>>> print insOref.Chapter.Name
> 'Chapter'
>>>> insOref.Chapter.Value=67
>>>> print insOref.Chapter
> 67
> 
> However, the problem is now that I can also write:
>>>> insOref.Chapter=67
> but we want to disallow this, as insOref.Chapter must remain =
> insProperty

Why?



> We add various other instances of CacheProperty to the insOref as
> well, btw.

This whole design seems incredibly byzantine to me. It would help if you
take a step back from asking technical questions "how do I do this?" and
instead tell us what you're trying to accomplish.

Why do you wrap the instances in the first place? What benefit do you get?

Here is something that you should do. Write your documentation for the
classes CacheProperty and CacheClass. The documentation should explain
what they are for, why you would use them, and how you use them. If you
can't explain what they are for and why you would use them, chances are
very very good that they don't do anything useful and you shouldn't use
them at all.




-- 
Steven D'Aprano 



From nmm1 at cus.cam.ac.uk  Fri Jan 12 06:33:18 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 12 Jan 2007 11:33:18 GMT
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
	<1168597288.571937.176430@s34g2000cwa.googlegroups.com>
Message-ID: <eo7rlu$oqh$1@gemini.csx.cam.ac.uk>


In article <1168597288.571937.176430 at s34g2000cwa.googlegroups.com>,
"Paul Boddie" <paul at boddie.org.uk> writes:
|> parallelpyt... at gmail.com wrote:
|> >
|> > The main difference between MPI python solutions and ppsmp is that with
|> > MPI you have to organize both computations
|> > {MPI_Comm_rank(MPI_COMM_WORLD, &id); if id==1 then ... else ....} and
|> > data distribution (MPI_Send / MPI_Recv) by yourself. While with ppsmp
|> > you just submit a function with arguments to the execution server and
|> > retrieve the results later.
|> 
|> Couldn't you just provide similar conveniences on top of MPI? Searching
|> for "Python MPI" yields a lot of existing work (as does "Python PVM"),
|> so perhaps someone has already done so. 

Yes.  No problem.

|> Also, what about various grid toolkits?

If you can find one that is robust enough for real work by someone who
is not deeply into developing Grid software, I will be amazed.


Regards,
Nick Maclaren.


From qertoip at gmail.com  Fri Jan 26 04:41:54 2007
From: qertoip at gmail.com (qertoip at gmail.com)
Date: 26 Jan 2007 01:41:54 -0800
Subject: xml.dom.minidom.parseString segmentation fault on mod_python
Message-ID: <1169804514.862290.274940@q2g2000cwa.googlegroups.com>

Python 2.4.4
mod_python 3.2.10  +  Apache 2.0

def index( req, **params ):
    from xml.dom.minidom import parseString
    doc = parseString( "whatever" )

=> blank screen, _no_any_exception_; Apache error_log:
[Fri Jan 26 10:18:48 2007] [notice] child pid 17596 exit signal
Segmentation fault (11)


Outside mod_python code works well. Any ideas? I would be grateful.



From stuart at bmsi.com  Mon Jan 22 17:35:18 2007
From: stuart at bmsi.com (Stuart D. Gathman)
Date: Mon, 22 Jan 2007 17:35:18 -0500
Subject: Best way to document Python code...
References: <1169492869.101706.253620@38g2000cwa.googlegroups.com>
	<tj9th.13185$pQ3.6593@newsread4.news.pas.earthlink.net>
Message-ID: <pan.2007.01.22.22.35.17.956837@bmsi.com>

On Mon, 22 Jan 2007 20:40:57 +0000, Adonis Vargas wrote:

> But a quick look at pydoc (not to be confused with epydoc) 
> which is part of the standard library allows you to generate 
> documentation in HTML format, and/or serve it over web with its built-in 
> HTTP server.
> 
> pydoc: http://docs.python.org/lib/module-pydoc.html
> 
> Hope this helps.
> 
> Adonis

The HTML generated by pydoc doesn't link to standard modules properly. 
They are generated as relative links.  So it can't be used without
modification for generating docs for a web page about a python package. 

I'm struggling with the same issue.  Coding Python is so much easier than
Java.  However documenting Java is so much easier than Python.  Just
include doc comments, run javadoc, and voila!

-- 
	      Stuart D. Gathman <stuart at bmsi.com>
Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.



From Thomas.Ploch at gmx.net  Sun Jan  7 13:30:17 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sun, 07 Jan 2007 19:30:17 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <enrdeh$utj$01$1@news.t-online.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>	<mailman.2394.1168189690.32031.python-list@python.org>
	<enrdeh$utj$01$1@news.t-online.com>
Message-ID: <45A13C39.4070707@gmx.net>

Sebastian 'lunar' Wiesner schrieb:
> 
> Those people deserve to fail for being just extraordinary stupid...
> 

Yes, but there are a lot of them around...

Thomas


P.S.: I don't mean they are around here. :-)


From fejkadress at hushmail.com  Mon Jan  1 20:09:19 2007
From: fejkadress at hushmail.com (fejkadress at hushmail.com)
Date: 1 Jan 2007 17:09:19 -0800
Subject: OO question
In-Reply-To: <1167639280.181587.242490@s34g2000cwa.googlegroups.com>
References: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
	<1167639280.181587.242490@s34g2000cwa.googlegroups.com>
Message-ID: <1167700159.792649.61210@a3g2000cwd.googlegroups.com>

First I want to say thanks everyone for helping me!

John Machin wrote:

> fejkadress at hushmail.com wrote:
> > I want to make an addressbook and I'm new to OO programming, so I
> > wonder if this sounds reasonable.
> >
> > I think of making a class Address which contains all data about one
> > person, that class can have UserDict as baseclass so I can access data
> > like object['name'], etc..
>
> Stop right there. Class Address contains all data about one *person*?
> Please consider renaming that class Person, and having a separate class
> Address.
>
> Interruption for a reality check:  A person may be related to zero, one
> or many addresses. An address may be related to zero, one or many
> persons. The relationship may take many forms e.g. "lives at", "once
> lived at", "has been noticed loitering outside", ...

Lets say I have those two classes, Person and Address. How would one
implement the relationship between them? First, a Person can have one
or more addresses (or none), that could be represented as a list of
Addresses, right? But then, if I have an Address I want to see which
persons who live there, then I would have a list of Persons in each
Address.

Is this doubly-linked way of doing it a good way of doing it, or is
there
a better "OO way" I haven't learned yet?



From nagle at animats.com  Mon Jan 29 12:42:44 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 29 Jan 2007 09:42:44 -0800
Subject: Possible security hole in SSL - was Random Passwords Generation
In-Reply-To: <7x64apzx8f.fsf@ruckus.brouhaha.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<7x3b5uwfa2.fsf@ruckus.brouhaha.com>
	<1170082883.393745.244840@a34g2000cwb.googlegroups.com>
	<7x64apzx8f.fsf@ruckus.brouhaha.com>
Message-ID: <UVpvh.36227$QU1.15833@newssvr22.news.prodigy.net>

Paul Rubin wrote:
> "Szabolcs Nagy" <nszabolcs at gmail.com> writes:
> 
>>file('/dev/urandom').read(6).encode('base64')
>>(oneliner and without import sa op requested)
> 
> 
> Nice, though Un*x dependent (os.urandom is supposed to be portable).

    Uh oh.  I was looking at the Python "SSL" code recently, and
noted that OpenSSL initializes the keys with '/dev/urandom' if
available, and otherwise relies on the caller to seed it with
random data and to check that enough randomness has been input.

    But the Python glue code for SSL doesn't seem to have the
machinery to seed SSL with randomness.  I suspect that on
platforms without '/dev/urandom', Python's SSL package may
be using the same keys every time.  This needs to be looked
at by a crypto expert.

					John Nagle


From pavlovevidence at gmail.com  Thu Jan  4 16:31:27 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 4 Jan 2007 13:31:27 -0800
Subject: subclassing a module: misleading(?) error message
References: <459d687a$1@nntp.zianet.com>
Message-ID: <1167946286.988570.216110@i15g2000cwa.googlegroups.com>

Erik Johnson wrote:
> My questions are:
>
> Why does python complain about a function here? (it's a class definition
> statement, right?)

Because you're calling the function with the wrong number of arguments.

> Is there really a function being called here?

Yes.  (Well, it's not exactly a function, but you are calling
something.)

> If so:
>     What function was called?

types.ModuleType

>     What two arguments is it expecting?

The name of the module and a docstring.

>     What three were given?

1. The name of the class
2. The tuple of bases
3. A dict containing the symbols defined inside the class statement.

You are aware, I presume, that types (be it classes or built-in types)
are callable.  For example, to create an instance of class of class X,
you would call X().  And to create a list, you can call list().  Well,
in the same way, you can call type(), with the three arguments above,
to create classes.  And that's just what the class statement does under
the covers (usually).

The following class definition:

class A(object):
    b = 1

is exactly equivalent to this explicit call to type:

A = type("A",(object,),{"b":1})

However, there are some cases where, instead of creating the class
object itself, type will instead call some other function to create it.
 One way is if you define __metaclass__ in the class namespace: then
type will call the object spec.  Another way is if there are any bases
which have a type other than type.  (Remember, bases are supposed to be
type objects.)

That's what happened to you.  type saw that type(Super) was
types.ModuleType, not type, so it called that instead of creating the
class itself.  However, types.ModuleType doesn't accept that same
arguments that a normal type constructor does, so you get the error.

Does that clear things up?  Probably not.  For a detailed explanation
of how this all works, look for some resources on learning
"metaclasses" or "metatypes" in Python.


Carl Banks



From nmm1 at cus.cam.ac.uk  Fri Jan 19 17:09:10 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 19 Jan 2007 22:09:10 GMT
Subject: OT Annoying Habits (Was: when format strings attack)
References: <mailman.2917.1169243036.32031.python-list@python.org>
Message-ID: <eorfi6$13p$1@gemini.csx.cam.ac.uk>


In article <mailman.2917.1169243036.32031.python-list at python.org>,
"Carroll, Barry" <Barry.Carroll at psc.com> writes:
|> 
|> Secondly, can someone point me to the Standard Usenet Convention that
|> mandates against top-posting.  This is not sarcasm; I would really like
|> to see it.  You see, I recently returned to Usenet after a LONG absence.
|> When I was last a regular Usenet citizen the Internet was new, GUI
|> interfaces were experimental and the World Wide Web didn't exist yet.
|> Newsreader software was text-based.  Top-posting was the common
|> practice, because it was the most convenient: you didn't have to page
|> through an arbitrarily large number of messages, most of which you'd
|> already read umpteen times, to get to the new stuff you were interested
|> in. =20

When I started to use this sort of thing, in the early 1970s, top
posting was already deprecated.

And top posting is only more convenient if you are merely adding a
"me, too" or equivalent, and not responding in detail.

But you have been told both of those before.


Regards,
Nick Maclaren.


From vpolukcht at gmail.com  Tue Jan 16 12:59:28 2007
From: vpolukcht at gmail.com (Victor Polukcht)
Date: 16 Jan 2007 09:59:28 -0800
Subject: Regular expressions question
In-Reply-To: <eoinj5$bqo$1@newsfeed.pit.comms.marconi.com>
References: <1168947810.175793.228620@51g2000cwl.googlegroups.com>
	<eoinj5$bqo$1@newsfeed.pit.comms.marconi.com>
Message-ID: <1168970367.938185.294140@q2g2000cwa.googlegroups.com>

Great thnx. It works.

On Jan 16, 6:02 pm, Wolfgang Grafen <wolfgang.gra... at marconi.com>
wrote:
> Victor Polukcht wrote:
> > I have 2 strings:
>
> > "Global               etsi3   *200 ok            30   100% 100%
> > Outgoing"
> > and
> > "Global               etsi3   *   4 ok             30   100% 100%
> > Outgoing"
>
> > The difference is "*200" instead of "*  4". Is there ability to write a
> > regular expression that will match both of that strings?---------------------------- x.py begin --------
> import re
>
> s1 = "Global               etsi3   *200 ok            30   100% 100% Outgoing"
> s2 = "Global               etsi3   *   4 ok             30   100% 100% Outgoing"
>
> re_m = re.compile( "^"
>                     "(\S+)"         # Global
>                     "\s+"
>                     "(\S+)"         # etsi3
>                     "\s+"
>                     "((\*)\s*(\d+))"    # *200 *  4
>                     "\s+"
>                     "(\S+)"         # ok
>                     "\s+"
>                     "(\S+)"         # 30
>                     "\s+"
>                     "(\S+)"         # 100%
>                     "\s+"
>                     "(\S+)"         # 100%
>                     "\s+"
>                     "(\S+)"         # Outgoing
>                     "$"
>                   ).match
>
> print "match s1:", re_m(s1).groups()
> print "match s2:", re_m(s2).groups()
> ----------------------------- x.py file end ---------
>
> % python x.py
> match s1: ('Global', 'etsi3', '*200', '*', '200', 'ok', '30', '100%', '100%', 'Outgoing')
> match s2: ('Global', 'etsi3', '*   4', '*', '4', 'ok', '30', '100%', '100%', 'Outgoing')



From martin at v.loewis.de  Sun Jan 21 02:21:33 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 21 Jan 2007 08:21:33 +0100
Subject: A solution to the MSVCRT vs MSVCR71 problem?
In-Reply-To: <1169348867.369917.104970@m58g2000cwm.googlegroups.com>
References: <1169348867.369917.104970@m58g2000cwm.googlegroups.com>
Message-ID: <45B3147D.9010407@v.loewis.de>

sturlamolden schrieb:
> Problem 2: You want to distribute a program created Py2Exe, but has no
> license for Visual Studio 2003. You are therefore not allowed to
> redistribute msvcrt71.dll. But without this DLL your program will not
> work. As a side note: Visual Studio 2003 is out of sale, so if you
> don't have it already you may be out of luck.

I believe this problem doesn't exist. Licensees of Python are permitted
to redistribute mscvr71.dll, as long as they redistribute it in order
to support pythonxy.dll. The EULA says

# You also agree not to permit further distribution of the
# Redistributables by your end users except you may permit further
# redistribution of the Redistributables by your distributors to your
# end-user customers if your distributors only distribute the
# Redistributables in conjunction with, and as part of, the Licensee
# Software, you comply with all other terms of this EULA, and your
# distributors comply with all restrictions of this EULA that are
# applicable to you.

In this text, "you" is the licensee of VS 2003 (i.e. me, redistributing
msvcr71.dll as part of Python 2.5), and the "Redistributable" is
msvcr71.dll. The "Licensee Software" is "a software application product
developed by you that adds significant and primary functionality to the
Redistributables", i.e. python25.dll.

IANAL; this is not legal advise.

Regards,
Martin


From tew24 at spam.ac.uk  Thu Jan 18 11:24:13 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Thu, 18 Jan 2007 16:24:13 +0000
Subject: How to find out if another process is using a file
Message-ID: <eoo6vd$33u$1@gemini.csx.cam.ac.uk>

I'm writing a program which reads a series of data files as they are dumped
into a directory by another process.  At the moment, it gets sporadic bugs
when it tries to read files which are only partially written.

I'm looking for a function which will tell me if a file is opened in
write-mode by another process - if it is, my program will ignore it for now
and come back to it later.  This needs to work on linux and windows.  Mac
OS would be a bonus too.  An os-independent solution would be good, but I
could write os-specific options and have it pick the appropriate one.

Is there any way of doing this? I've drawn a blank with google so far.

A nasty hack would be to use the file modification time, and wait until
that's a few seconds in the past, but is there a nice solution?


-- 
I'm at CAMbridge, not SPAMbridge


From jon at ffconsultancy.com  Tue Jan  2 20:12:38 2007
From: jon at ffconsultancy.com (Jon Harrop)
Date: Wed, 03 Jan 2007 01:12:38 +0000
Subject: Writing more efficient code
References: <mailman.2185.1167676577.32031.python-list@python.org>
	<459959ea$0$8719$ed2619ec@ptn-nntp-reader02.plus.net>
	<1167715231.450710.325860@42g2000cwt.googlegroups.com>
Message-ID: <459b0380$0$8731$ed2619ec@ptn-nntp-reader02.plus.net>

Beliavsky wrote:
> If in the newsgroup comp.lang.x somone asks how to do y, and you
> suggest using language z, without answering their question, which was
> how to do it in x, you will likely just annoy people and perhaps make
> it even less likely that they will try z.

Pattern matching isn't a language.

-- 
Dr Jon D Harrop, Flying Frog Consultancy
Objective CAML for Scientists
http://www.ffconsultancy.com/products/ocaml_for_scientists/index.html?usenet


From wd.jonsson at gmail.com  Thu Jan 25 05:26:09 2007
From: wd.jonsson at gmail.com (wd.jonsson at gmail.com)
Date: 25 Jan 2007 02:26:09 -0800
Subject: While loop with "or"? Please help!
Message-ID: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>

Hmm, my while loop with "or" doesn't seem to work as I want it to...
How do I tell the while loop to only accept "Y" or "y" or "N" or "n"
input from the str(raw_input)?

Thank's in advance!

Snippet of code:

import os

def buildfinder():
    os.system("CLS")
    GameRoot = os.getenv("GAME_ROOT") + "\\"

    print "Do you want to use " + GameRoot + " as your source
directory?"
    usr = str(raw_input('Y/N: '))
    return usr

#Runs the buildfinder function
usrinp = buildfinder()

def buildwhiler():

    while usrinp != "y" or "Y" or "N" or "n": <<<<----PROBLEM
        print "Enter Y or N!"
        usr = str(raw_input('Y/N: '))
    else:
        code continues



From wilder.usenet at gmail.com  Thu Jan 11 18:38:22 2007
From: wilder.usenet at gmail.com (J)
Date: 11 Jan 2007 15:38:22 -0800
Subject: Matching Directory Names and Grouping Them
In-Reply-To: <mailman.2605.1168555761.32031.python-list@python.org>
References: <1168554244.459131.190440@k58g2000hse.googlegroups.com>
	<mailman.2605.1168555761.32031.python-list@python.org>
Message-ID: <1168558702.851290.230100@i56g2000hsf.googlegroups.com>

Steve-

Thanks for the reply. I think what I'm trying to say by similar is
pattern matching. Essentially, walking through a directory tree
starting at a specified root folder, and returning a list of all
folders that matches a pattern, in this case, a folder name containing
a four digit number representing year and a subdirectory name
containing a two digit number representing a month. The matches are
grouped together and written into a text file. I hope this helps.

Kind Regards,
J

Steve Holden wrote:
> J wrote:
> > Hello Group-
> >
> > I have limited programming experience, but I'm looking for a generic
> > way to search through a root directory for subdirectories with similar
> > names, organize and group them by matching their subdirectory path, and
> > then output their full paths into a text file. For example, the
> > contents of the output text file may look like this:
> >
> > <root>\Input1\2001\01\
> > <root>\Input2\2001\01\
> > <root>\Input3\2001\01\
> >
> > <root>\Input1\2002\03\
> > <root>\Input2\2002\03\
> > <root>\Input3\2002\03\
> >
> > <root>\Input2\2005\05\
> > <root>\Input3\2005\05\
> >
> > <root>\Input1\2005\12\
> > <root>\Input3\2005\12\
> >
> > I tried working with python regular expressions, but so far haven't
> > found code that can do the trick. Any help would be greatly
> > appreciated. Thanks!
> >
> Define "similar".
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb     http://del.icio.us/steve.holden
> Blog of Note:          http://holdenweb.blogspot.com



From gert.cuykens at gmail.com  Sun Jan 21 21:25:06 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Mon, 22 Jan 2007 03:25:06 +0100
Subject: instancemethod
In-Reply-To: <ef60af090701211758s4e10back9203edefb97328e3@mail.gmail.com>
References: <ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a@mail.gmail.com>
	<ep110v$t04$1@sea.gmane.org>
	<ef60af090701211712u4d5a520q84c8e86c898bc649@mail.gmail.com>
	<ef60af090701211758s4e10back9203edefb97328e3@mail.gmail.com>
Message-ID: <ef60af090701211825r535e64e6va3580dbe24e15bd5@mail.gmail.com>

import MySQLdb

class Db:

    _db=-1
    _cursor=-1
    rowcount=-1

    def __init__(self,server,user,password,database):
        self._db=MySQLdb.connect(server , user , password , database)
        self._cursor=self._db.cursor()

    def excecute(self,cmd):
        self._cursor.execute(cmd)
        self._db.commit()
        self.rowcount=int(self._cursor.rowcount())

    def fetchone(self):
        return self._cursor.fetchone()

    def close(self):
        self._cursor.close()
        self._db.close()

if __name__ == '__main__':
    gert=Db('localhost','root','*******','gert')
    gert.excecute('select * from person')
    for x in range(0,gert.rowcount):
        print gert.fetchone()
    gert.close()

Traceback (most recent call last):
  File "Desktop/svn/db/Py/db.py", line 28, in <module>
    gert.excecute('select * from person')
  File "Desktop/svn/db/Py/db.py", line 17, in excecute
    self.rowcount=int(self._cursor.rowcount())
TypeError: 'long' object is not callable

I guess i did something wrong again ? :)


From jgodoy at gmail.com  Sat Jan 13 15:22:55 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sat, 13 Jan 2007 18:22:55 -0200
Subject: sqlobject 0.8.0b1 and python 2.5
References: <mailman.2691.1168697941.32031.python-list@python.org>
	<50st46F1hiu23U1@mid.uni-berlin.de>
Message-ID: <871wly7k2o.fsf@gmail.com>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> To my knowledge, the 0.8.x series is the current line of development, and has
> made major progress over the previous versions. What makes you think it will
> be stopped developing? And where does a sqlobject2 come from?

http://www.sqlobject.org/2/


Be seeing you,
-- 
Jorge Godoy      <jgodoy at gmail.com>


From danb_83 at yahoo.com  Fri Jan  5 21:38:38 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 5 Jan 2007 18:38:38 -0800
Subject: Dividing integers...Convert to float first?
In-Reply-To: <mailman.2337.1168019188.32031.python-list@python.org>
References: <1168017342.255981.134400@11g2000cwr.googlegroups.com>
	<459E8B5C.6020804@gmx.net> <459E8C77.3020603@rpath.com>
	<mailman.2337.1168019188.32031.python-list@python.org>
Message-ID: <1168051118.835190.118540@q40g2000cwq.googlegroups.com>

On Jan 5, 11:47 am, Thomas Ploch <Thomas.Pl... at gmx.net> wrote:
> Jonathan Smith schrieb:
>
> > Thomas Ploch wrote:
> >> redefined.horiz... at gmail.com schrieb:
> >>> I'm still pretty new to Python. I'm writing a function that accepts
> >>> thre integers as arguments. I need to divide the first integer by te
> >>> second integer, and get a float as a result. I don't want the caller of
> >>> the function to have to pass floats instead of integers. How do I
> >>> convert the arguments passed to the function into floats before I do
> >>> the division? Is this necessary, or is their a better way?
...
> >>>> from __future__ import division
> >>>> 1/2
> > 0.5
>
> > -smithjaahh, I have been tought so many things about python that are actually
> so old, that I am starting to feel embarrassed.

Don't feel embarrassed.  "from __future__ import division" was added to
Python only five years ago, so the tutorial writers haven't had enough
time to mention it yet.

Just remember that it's a good idea to use "from __future__ import
division" (or better, "from __future__ import division as _division")
in every module, and if you really want integer division, use the //
operator instead of /.  This will ensure that your code will continue
to work correctly in Python 3.0, and that you won't be bitten by subtle
bugs like

def mean(num_list):
    return sum(num_list) / len(num_list)



From elrondrules at gmail.com  Thu Jan 25 21:32:26 2007
From: elrondrules at gmail.com (elrondrules at gmail.com)
Date: 25 Jan 2007 18:32:26 -0800
Subject: Http listener
Message-ID: <1169778746.893177.20730@v33g2000cwv.googlegroups.com>

Hi

Am new to python and I am trying to do the following:

1. Write a Http Listener (listening on a particular port) that
subscribes to a process.
2. This process posts events as xml docs.
3. Parse the xml docs as and when they are posted.

Am trying to find any resources that helps me to do write the Http
Listener.. 
any starting pointers would be helpful

thx



From arkanes at gmail.com  Mon Jan  8 11:49:26 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 8 Jan 2007 10:49:26 -0600
Subject: Suitability for long-running text processing?
In-Reply-To: <c2701f5c0701080835o7013c43fm3e71e9b7d1a11329@mail.gmail.com>
References: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>
	<c2701f5c0701080801w4d3c378elf901db19610a2e9e@mail.gmail.com>
	<84fb38e30701080813k1be616fch6d01922fb7a92fc5@mail.gmail.com>
	<c2701f5c0701080835o7013c43fm3e71e9b7d1a11329@mail.gmail.com>
Message-ID: <4866bea60701080849h16d1dacew7a0abe950726c006@mail.gmail.com>

On 1/8/07, Felipe Almeida Lessa <felipe.lessa at gmail.com> wrote:
> On 1/8/07, tsuraan <tsuraan at gmail.com> wrote:
> >
> >
> > > I just tried on my system
> > >
> > > (Python is using 2.9 MiB)
> > > >>> a = ['a' * (1 << 20) for i in xrange(300)]
> > > (Python is using 304.1 MiB)
> > > >>> del a
> > > (Python is using 2.9 MiB -- as before)
> > >
> > > And I didn't even need to tell the garbage collector to do its job. Some
> > info:
> >
> > It looks like the big difference between our two programs is that you have
> > one huge string repeated 300 times, whereas I have thousands of
> > four-character strings.  Are small strings ever collected by python?
>
> In my test there are 300 strings of 1 MiB, not a huge string repeated. However:
>
> $ python
> Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02)
> [GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> # Python is using 2.7 MiB
> ... a = ['1234' for i in xrange(10 << 20)]
> >>> # Python is using 42.9 MiB
> ... del a
> >>> # Python is using 2.9 MiB
>
> With 10,485,760 strings of 4 chars, it still works as expected.
>
> --
> Felipe.
> --

Have you actually ran the OPs code? It has clearly different behavior
than what you are posting, and the OPs code, to me at least, seems
much more representative of real-world code. In your second case, you
have the *same* string 10,485,760 times, in the OPs case each string
is different.

My first thought was that interned strings were causing the growth,
but that doesn't seem to be the case. Regardless, what he's posting is
clearly different, and has different behavior, than what he is
posting. If you don't see the memory leak when you run the code he
posted (the *same* code) that'd be important information.


From sjmachin at lexicon.net  Mon Jan  8 18:01:35 2007
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 09 Jan 2007 10:01:35 +1100
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5
In-Reply-To: <2BBAEE949D384D40A2B851287ADB6A4304595A68@eugsrv400.psc.pscnet.com>
References: <2BBAEE949D384D40A2B851287ADB6A4304595A68@eugsrv400.psc.pscnet.com>
Message-ID: <45A2CD4F.9060004@lexicon.net>

On 9/01/2007 8:25 AM, Carroll, Barry wrote:
>> -----Original Message-----
>> From: python-list-bounces+barry.carroll=psc.com at python.org [mailto:python-
>> list-bounces+barry.carroll=psc.com at python.org] On Behalf Of John Machin
>> Sent: Saturday, January 06, 2007 11:09 PM
>> To: python-list at python.org
>> Subject: Re: File Closing Problem in 2.3 and 2.4, Not in 2.5
>>
>> Martin v. L?wis wrote:
>>> Carroll, Barry schrieb:
>>>> What I want to know is:
>>>>
>>>> * has anyone else encountered a problem like this, * how was the
>>>> problem corrected, * can the fix be retro-fitted to 2.5 and 2.4?
>>> From your description, I suspect an error in your code. Your description
>>> indicates that you don't expect to have more than five files open
>>> simultaneously. Yet, the error message "Too many open files" occurs when
>>> you open many more files (in the order of hundreds of files).
>>>
>>> It is very unlikely that there is a bug in Python where it would fail to
>>> close a file when .close() is explicitly invoked on it (as your
>>> description suggests that you do), so if you get that error message, it
>>> can only mean that you fail to close some files.
>> I don't understand:  the OP's description suggests nothing of the sort
>> to me. What he said was:
>> """
>> In this way, a tree of Parser instances is created, each with a single
>> open file object.  (BTW, recursive and circular references are not
>> allowed.)  When each Parser instance comes to the end of its table, the
>> instance is explicitly destroyed, presumably destroying any objects it
>> holds, AND closing its open file.
>> """
>> which I interpret as: he is doing del parser_instance, and *presuming*
>> (incorrectly) that attributes of parser_instance (including an open
>> file object) are magically whisked away instantly, instead of
>> later/maybe. He later says he explicitly closed the files, which fixed
>> what he alleges (incorrectly) to be a bug.
>>
>> To the OP:
>> (1) The del statement doesn't "destroy" anything. It unbinds the name
>> from the object in the current namespace, and decrements the object's
>> reference count. Only if the reference count is then zero will the
>> janitor be called in.
>> (2) Check the reference count on the parser_instance just before you
>> del it. You could be retaining a reference somewhere.
>> (3) Explicitly close all non-lightweight objects like files (even
>> read-only ones) and sockets rather than hoping they will go away.
>>
>> HTH,
>> John
> 
> John:
> 
> Thank you.  I was afraid I had been totally misunderstood.  We have retained the explicit file close in the current version of the Parser code.  
> 
> I still have a question, however.  Python 2.3 and 2.4 both produce the "Too many open files" error on Windows XP Pro, but Python 2.5 does not.  Running on the 2.5 interpreter, our program process all the table invocations with no errors, a total of over 650 file opens.  Also, Python 2.3 on RedHat Fedora core 1 runs our program to completion with no errors.  (I know, we are running pretty ancient SW here. Constraints unrelated to this question make that necessary.)  Do you know why the error would appear on some combinations of OS and interpreter and not on others?
> 
> Thanks again for your help.
> 
> Regards,
>  
> Barry

Hi Barry,

Please always reply on-list if the communication is non-private -- and 
meaningful :-)

I don't know; here are some things you could check out:

(1) Windows XP versus *x: The limit on open file handles is 512 in 
Windows XP; write yourself a reference-preserving [hint: append to a 
list] multiple file opener on *x and see how many you get open. I have 
vague recollections of the number 1024 being mentioned.

(2) Python 2.4 versus 2.5: Read the "what's new" doc, fire up your 
googler, ...

IMHO, the attitude should be to program defensively so that you need 
neither to know nor care about such implementation-specific concerns. 
Operating systems these days give you enough file handles to do any 
reasonable job. It's many moons since MS-DOS 2.n with its max 20 open 
file handles made folks implement LRU caches for file handles.

Simple rules about unwanted objects include:
(1) If an object has a free() or close() method, then call it!
(2) Unbind *all* references to the object.

Have you checked out my point 2 (holding multiple references to your 
Parser objects)?

Cheers,
John


From wilson at afn.org  Mon Jan 15 17:28:41 2007
From: wilson at afn.org (Jim B. Wilson)
Date: Mon, 15 Jan 2007 22:28:41 GMT
Subject: The curious behavior of integer objects
Message-ID: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>

Am I nuts? Or only profoundly confused? I expected the this little script
to print "0":

class foo(int): 
  def __init__(self, value):
    self = value & 0xF

print foo(0x10)

Instead, it prints "16" (at least on python 2.4.4 (Linux) and 2.5 (Wine).

Jim Wilson
GNV, FL


From mcfletch at vrplumber.com  Mon Jan  8 15:39:23 2007
From: mcfletch at vrplumber.com (Mike C. Fletcher)
Date: Mon, 08 Jan 2007 15:39:23 -0500
Subject: Traceback of hanged process
In-Reply-To: <1168286710.482272.33770@11g2000cwr.googlegroups.com>
References: <mailman.2377.1168125259.32031.python-list@python.org>
	<1168286710.482272.33770@11g2000cwr.googlegroups.com>
Message-ID: <45A2ABFB.7050208@vrplumber.com>

Klaas wrote:
> Hynek Hanke wrote:
>   
>> Hello,
>>
>> please, how do I create a pythonic traceback from a python process that
>> hangs and is not running in an interpreter that I executed manually
>> or it is but doesn't react on CTRL-C etc? I'm trying to debug a server
>> implemented in Python, so I need some analog of 'gdb attach' for C.
>>     
...
> In python2.5, you can run a background thread that listens on a port or
> unix socket, and prints a formatted version of sys._current_frames() to
> stderr.  
>   
You can also use the signal module to similar effect.  Works well in 
Twisted, at least:

    http://blog.vrplumber.com/835

HTH,
Mike

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



From half.italian at gmail.com  Wed Jan 24 21:47:46 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 24 Jan 2007 18:47:46 -0800
Subject: My Tkinter Threading nightmare
Message-ID: <1169693266.209082.323310@a75g2000cwd.googlegroups.com>

Hi all,

I don't really understand how to properly use threading in my programs,
however I have managed to get by so far using them improperly.  Once
again I have come up to what I think is something that won't work
because of the way the program is set up.

I have a long running process running underneath a gui in a different
thread, and a progress bar that updates the status of the operation.
What I would like to do is use something like :

self.progressWindow.protocol('WM_DELETE_WINDOW', self.callback)

and setup the callback to kill the operation and then the window when
the user clicks on the X of the progress window.  I've implemented this
in my code, but clicking on the X does nothing until I kill the main
thread (i think), and then my callback is run.  I've also had problems
in the past of the gui not refreshing properly, which leads me to
believe that both of these are thread related.  Any help would be
immensely appreciated.

~Sean DiZazzo

~~~~~~~~~~~~~~~~~~~

import sys, os, time

libdir = "/usr/local/sw/lib"
sys.path.append(libdir)

import ProgressBarView, Folder, P

from Tkinter import *
from tkFileDialog import askopenfilenames
from tkMessageBox import showerror, showinfo
import pexpect, ssh_session

import P
import Pmw

rootWin = Tk()

class Window(Frame):
	label = None
	initialdir = "/"

	dest = "/tmp"
	folder = None
	logpath = "/tmp/Send.log"
	copyindex = 0
	files = []
	progressWindow = None
	session = None
	password = P.P()
	ssh = ssh_session.ssh_session("root", "XX.XX.XX.XX",
password.Decrypt(password.sean))

	timeout = 30

	def __init__(self, parent=None):
		Frame.__init__(self, parent)
		rootWin.title("Send to Blah")
		rootWin.resizable(width=0,height=0)
		self.pack()
		self.progress_and_log()
		f = Frame(self)
		openfunc = (lambda self=self, name=None: self.openfolder())
		Button(f, text="Choose", command=openfunc).pack(side="left")
		self.label = Label(f, text=' <--- Choose files', bg="grey", width=40,
justify='left', anchor='w')
		self.label.pack(side="left", anchor='w', padx=5)
		f.pack(padx=10, pady=10, side='left', fill='both', anchor='w')
		submitfunc = (lambda self=self, name=None: self.submit())
		b = Button(self, text="Send", command=submitfunc)
		b.pack(side="right", padx=5)


	def openfolder(self):
		self.files = []
		self.files_tuple = askopenfilenames(parent=rootWin, initialdir="/")

		for file in self.files_tuple:
			self.files.append(file)

		self.files.sort()

		label = "Click button to send files -->"
		self.st.configure(text_state = 'normal')
		self.st.clear()
		self.st.insert('end', "Files to be copied:\n")
		self.st.insert('end', "~~~~~~~~~~~~~~~~~~~\n")
		for file in self.files:
			self.st.insert('end', os.path.split(file)[-1] + "\n")
		self.st.insert('end', " \n \n")
		self.st.configure(text_state = 'disabled')
		self.label.config(text='Click to send files --->  ', justify='right',
anchor='e')

	def callback(self):
		"""Need to get the pid here and kill the running process"""

	def submit(self):
		files = self.files
		dest = Folder.Folder(self.dest)

		for file in files:
			if self.ssh.exists(os.path.join(dest.path,
os.path.split(file)[-1])):
				showerror("error", "The file '%s' already exists" %
os.path.join(dest.path, os.path.split(file)[-1]))
				return 0

		import threading
		geometry = None

		for file in files:
			self.progressWindow = Toplevel(rootWin)
			self.progressWindow.protocol('WM_DELETE_WINDOW', self.callback)
			self.progressWindow.geometry(geometry)
			self.progressWindow.title("Progress")
			self.progressWindow.resizable(width=0,height=0)

			self.proglabel = Label(self.progressWindow, text='Copying...',
anchor=NW, justify=LEFT, width=30)
			self.proglabel.pack(fill=X, expand=1)
			self.progressBar =
ProgressBarView.ProgressBarView(self.progressWindow)
			self.progressBar.pack(fill=X)

			threading.Thread(target=self.threadedCopy,args=(file, dest)).start()

			#grab the location from the first window
			if geometry is None:
				self.progressBar.updateProgress(0)
				geometry = self.progressWindow.geometry()

			self.incrementProgress(self.progressWindow, file, dest)

		self.label.config(text=" <--- Choose files", justify='left',
anchor='w')
		self.files=[]

	def progress_and_log(self):
		self.st = Pmw.ScrolledText(rootWin, borderframe = 1,
		usehullsize = 1,
                hull_width = 400,
                hull_height = 150,
                text_wrap='none',
                #text_font = fixedFont,
                text_padx = 4,
                text_pady = 4,
		)
		self.st.configure(text_state = 'disabled')

		self.st.pack(padx = 5, pady = 5, fill = 'both', expand = 1)


	def threadedCopy(self, file, dest):
		self.ssh.scp(file, os.path.join(dest.path, os.path.split(file)[1]))

	def appendToLog(self, src, dest):
		dest_size = self.ssh.size(dest.path)
		try:
			dest_size = float(dest_size)
		except:
			dest_size = 0

		if src.size == dest_size:
			status = "SUCCESS"
		else:
			status = "FAILED"
		entry = "%s - %s %s, %s\n" % (time.ctime(time.time()), status,
src.name, src.readableSize)

		f = open(self.logpath, 'a')
		f.write(entry)
		f.close()

		self.st.configure(text_state = 'normal')
		self.st.insert('end', entry)
		self.st.configure(text_state = 'disabled')


	def incrementProgress(self, window, file, dest):
		import File
		src = File.File(file)
		dest = File.File(os.path.join(dest.path, os.path.split(file)[-1]))
		start = time.time()


		p = 0
		last_dest = 0
		same_count = 0

		while  p < 100:
			d_size = self.ssh.size(dest.path)
			try:
				float(d_size)
			except:
				"Couldn't turn %s into a float" % d_size
				continue

			if last_dest == d_size and same_count == 40:
				showerror("error", "Error copying %s\nRemoving the partially
transferred file and continuing..." % dest.path)
				self.ssh.ssh("sudo rm %s" % dest.path)

			if d_size == None:
				d_size = 1000

			self.proglabel.config(text=src.name)

			p = (float(d_size) / float(src.size)) * 100.0

			d_size = self.ssh.size(dest.path)
			if last_dest == d_size:
				same_count = same_count +1

			print "P:", p
			self.progressBar.updateProgress(p)
			self.update_idletasks()
			time.sleep(0.25)
			last_dest = d_size

		self.appendToLog(src, dest)
		window.destroy()
		return 
		

if __name__ == "__main__":
	Window().mainloop()



From gagsl-py at yahoo.com.ar  Wed Jan 24 13:17:01 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 24 Jan 2007 15:17:01 -0300
Subject: module email
In-Reply-To: <ep7vuk$235b$1@news.rtcomm.ru>
References: <ep7vuk$235b$1@news.rtcomm.ru>
Message-ID: <7.0.1.0.0.20070124151444.03481110@yahoo.com.ar>

At Wednesday 24/1/2007 13:02, Sergey Dorofeev wrote:

>Why does not work?

Some details please?


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From exarkun at divmod.com  Tue Jan 30 10:59:30 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 30 Jan 2007 10:59:30 -0500
Subject: Synchronous shutil.copyfile()
In-Reply-To: <4e8efcf50701300705v2b787ec4h1c539cab8068d58c@mail.gmail.com>
Message-ID: <20070130155930.25807.817470641.divmod.quotient.3564@ohm>

On Tue, 30 Jan 2007 15:05:23 +0000, Hugo Ferreira <bytter at gmail.com> wrote:
>Hi there,
>
>I have a problem. I'm using calling shutil.copyfile() followed by
>open(). The thing is that most of the times open() is called before
>the actual file is copied. I don't have this problem when doing a
>step-by-step debug, since I give enough time for the OS to copy the
>file, but at run-time, it throws an exception.
>
>Is there anyway to force a sync copy of the file (make python wait for
>the completion)?

shutil.copyfile() _is_ synchronous.  Check out the source:

def copyfileobj(fsrc, fdst, length=16*1024):
    """copy data from file-like object fsrc to file-like object fdst"""
    while 1:
        buf = fsrc.read(length)
        if not buf:
            break
        fdst.write(buf)

def copyfile(src, dst):
    """Copy data from src to dst"""
    if _samefile(src, dst):
        raise Error, "`%s` and `%s` are the same file" % (src, dst)

    fsrc = None
    fdst = None
    try:
        fsrc = open(src, 'rb')
        fdst = open(dst, 'wb')
        copyfileobj(fsrc, fdst)
    finally:
        if fdst:
            fdst.close()
        if fsrc:
            fsrc.close()

The problem you are experiencing must have a different cause.

Jean-Paul


From jim at none  Wed Jan 31 15:41:27 2007
From: jim at none (Jim)
Date: Wed, 31 Jan 2007 13:41:27 -0700
Subject: Python 2.5 Tkinter not configured
References: <epmi580m8c@enews4.newsguy.com> <528ctaF1nig7eU1@mid.uni-berlin.de>
Message-ID: <epquj405ek@enews4.newsguy.com>

Diez B. Roggisch wrote:

> Jim schrieb:
>> I compiled Python 2.5 from python.org and I get an error message when I
>> try to import the Tkinter module. Python reports that there is no such
>> module. It says my Python isn't configured for Tkinter. How do I
>> configure it? I'm using GCC 4.1.1 to compile the tarball. Thanks for any
>> help with this.
> 
> You need to have tcl/tk together with it's development-headers
> installed. Python _should_ figure out where things are, and then be
> configured to include tkinter.
> 
> Diez

That was the problem, I got it working after recompiling. Thanks.

Jim


From fredrik at pythonware.com  Fri Jan  5 01:36:28 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 05 Jan 2007 07:36:28 +0100
Subject: Undefined symbol __pure_virtual when importing MySQLdb
In-Reply-To: <1167977378.425615.220350@51g2000cwl.googlegroups.com>
References: <1167977378.425615.220350@51g2000cwl.googlegroups.com>
Message-ID: <enkrlc$uve$1@sea.gmane.org>

antonyliu2002 at yahoo.com wrote:

> I have googled hard, and did see someone asking the same question, but
> haven't found a good solution to this problem.  Could anyone give me a
> hint?  Thanks a lot!

googling for "undefined symbol: __pure_virtual" brings up hundreds of 
posts on this topic, and the answer is *always* to make sure that you're 
linking with a version of the C++ libraries that matches your compiler.

</F>



From pythonnews at nospam.jmbc.fr  Wed Jan 17 09:55:40 2007
From: pythonnews at nospam.jmbc.fr (jean-michel bain-cornu)
Date: Wed, 17 Jan 2007 15:55:40 +0100
Subject: IMAP SEARCH Error
In-Reply-To: <1169043202.521317.226910@q2g2000cwa.googlegroups.com>
References: <1169043202.521317.226910@q2g2000cwa.googlegroups.com>
Message-ID: <45ae38fc$0$21151$7a628cd7@news.club-internet.fr>

> imaplib.abort: command: SEARCH => unexpected response: '*'
> 
> Can anyone tell me why this happens ?

It looks like a server problem. What kind of server are you using ? 
Exchange, Cyrus ?
Did you try with two different Imap servers ?
If it is a unix server, did you have a look in /var/log ? Or in windows 
event log ?


From joel.hedlund at gmail.com  Thu Jan 11 04:05:21 2007
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Thu, 11 Jan 2007 10:05:21 +0100
Subject: Need startup suggestions for writing a MSA viewer GUI in python
In-Reply-To: <mailman.2534.1168441812.32031.python-list@python.org>
References: <eo2uhr$ffn$1@news.lysator.liu.se>
	<mailman.2534.1168441812.32031.python-list@python.org>
Message-ID: <eo4u2m$9c$1@news.lysator.liu.se>

> This will probably be a major, but not humongous project. wxPython,
> pyGTk, and pyQt all have the architecture and basics you'll need, it
> will probably be about the same amount of work to create in all of
> them. Pick the one that best suites your licensing and platform needs.

Thanks for the suggestions. Now I'll start my reading up.

Cheers!
/Joel


From tinaweb at bestemselv.com  Tue Jan 16 12:57:44 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Tue, 16 Jan 2007 18:57:44 +0100
Subject: PyQt: QListviewItemIterator
Message-ID: <K4ydnVE5x8iEjzDYRVnzvA@telenor.com>

Hi,
I'm fairly new to both Python and Qt so please bare with me.

I have a QListView with a number of columns. In order to filter the 
output I iterate using QListViewItemIterator looking for the string 
entered by the user (filterString). Currently I do it this way:


it = QListViewItemIterator(self.authListView)
             try:
                 while it:
                     item = it.current()
                     if item.text(0).contains(filterString) or 
item.text(1).contains(filterString) or item.text(2).contains(filterString):
                         item.setVisible(1)
                     else:
                         item.setVisible(0)
                     it +=1
             except AttributeError:
                     pass


Basically I iterate through the ListView until it goes beyond the list 
and raise an exception, which I catch. It works but to be honest it 
looks and feels ugly; "Do something until it goes wrong"

So, question: How can I know I have reached the last item in the QListView?

Thanks
Tina


From http  Thu Jan 25 12:30:17 2007
From: http (Paul Rubin)
Date: 25 Jan 2007 09:30:17 -0800
Subject: Python does not play well with others
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
	<1169726842.719104.304300@v45g2000cwv.googlegroups.com>
	<wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
Message-ID: <7x8xfrnhee.fsf@ruckus.brouhaha.com>

John Nagle <nagle at animats.com> writes:
>     My main concern is with glue code to major packages.  The connections
> to OpenSSL, MySQL, and Apache (i.e. mod_python) all exist, but have major
> weaknesses.  If you're doing web applications, those are standard pieces
> which need to work right.  There's a tendency to treat those as abandonware
> and re-implement them as event-driven systems in Twisted.  Yet the
> main packages aren't seriously broken.  It's just that the learning curve
> to make a small fix to any of them is substantial, so nobody new takes
> on the problem.

There is an attitude widespread in the Python community, maybe
inherited from Extreme Programming, that when writing some subsystem
it's enough to implement just enough functionality to satisfy the
application's immediate needs.  Then if the application needs more
functionality from the subsystem later, go back and add it.  That's
fairly reasonable when the application and subsystem are being done by
the same people and there's not such a learning curve.  But it's
unwise for libraries.  For all Java's ugliness, when the Java library
developers want to implement some protocol like SSL, they take the
specification for the protocol and they implement it completely.
Python's library modules are very often missing stuff, as you've
pointed out.

In the specific examples of OpenSSL, MySQL, and Apache, the modules
involved aren't even part of the Python stdlib, the way JSSE and JDBC
are part of the Java stdlib (I guess that doesn't apply to Tomcat
though).


From hg at nospam.org  Tue Jan 23 10:32:50 2007
From: hg at nospam.org (hg)
Date: Tue, 23 Jan 2007 16:32:50 +0100
Subject: My python programs need a GUI, wxPython or PyQt4?
References: <ep60jp$63v$1@aioe.org>
Message-ID: <82wth.63580$Yu6.28960@newsfe16.lga>

Daniel Jonsson wrote:

> So, I've reached the point where my building pipeline tools actually
> needs to be used by other people in my company. By this reason I
> actually need to think about the usability, and I've come to the
> conclusion that I need a GUI. So, which of the two packages should I
> learn, and which one is easier to pick up?
> Thanks in advance!
> 
> Daniel

It is best you try both ... I feel they have the same quality.

The cross plateform issue depends on your needs/constraints ... I need
cross-platform for commercial applications so I went for wx

hg



From sittner at lkb.ens.fr  Tue Jan 23 08:20:58 2007
From: sittner at lkb.ens.fr (sittner at lkb.ens.fr)
Date: Tue, 23 Jan 2007 14:20:58 +0100 (CET)
Subject: best package for a physical simulation?
In-Reply-To: <mailman.9299.1169555288.32030.python-list@python.org>
References: <mailman.9299.1169555288.32030.python-list@python.org>
Message-ID: <60915.195.220.102.78.1169558458.squirrel@mailgate.phys.ens.fr>

Hello everyone,
i would like to use python to perform some simulation involving collisions
of colloidal particles.
which is the best package/engine to do that in python?
thanks,
T



From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 12 19:19:46 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 13 Jan 2007 11:19:46 +1100
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<mailman.2597.1168550439.32031.python-list@python.org>
	<eo6ia5$5bt$1@gemini.csx.cam.ac.uk>
	<mailman.2643.1168611301.32031.python-list@python.org>
	<eo883j$l9d$1@gemini.csx.cam.ac.uk>
	<mailman.2648.1168616202.32031.python-list@python.org>
	<eo8b1r$r9c$1@gemini.csx.cam.ac.uk>
	<8c7f10c60701121134q35bf7c27h7c4b5cf1dcfe44ca@mail.gmail.com>
	<45A7E8E9.8060105@gmx.net>
	<mailman.2667.1168632427.32031.python-list@python.org>
Message-ID: <pan.2007.01.13.00.19.46.346604@REMOVE.THIS.cybersource.com.au>

On Fri, 12 Jan 2007 20:07:04 +0000, Simon Brunning wrote:

> On 1/12/07, Thomas Ploch <Thomas.Ploch at gmx.net> wrote:
>> Do not forget:
>>
>> - Time
>> - Personal Data (like birthdays, age)
> 
> The datetime module has perfectly good classes for holding date and
> time values, and age sounds like an integer to me.

You've obviously never spoken to a small child who insists, absolutely
insists, that they aren't five years old, but "almost five and a half".

:)


-- 
Steven.



From rshepard at appl-ecosys.com  Thu Jan 25 16:46:59 2007
From: rshepard at appl-ecosys.com (Rich Shepard)
Date: Thu, 25 Jan 2007 13:46:59 -0800 (PST)
Subject: Right-Justifying Numeric Output
Message-ID: <Pine.LNX.4.64.0701251343070.15822@salmo.appl-ecosys.com>

   I have this print statement in a function:

print '%2d   $%11.2f  $%10.2f  $%9.2f  $%9.2f' %(nper, pv, diff, ten, bonus)

and I would like to have the output right justified in the specified field.
My trials using .rjust(n) have produced that string in the output, not the
intended results. Is there a way of right justifying numeric output?

Thanks,

Rich

-- 
Richard B. Shepard, Ph.D.               |    The Environmental Permitting
Applied Ecosystem Services, Inc.        |          Accelerator(TM)
<http://www.appl-ecosys.com>     Voice: 503-667-4517      Fax: 503-667-8863


From __peter__ at web.de  Wed Jan 17 11:36:40 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 17 Jan 2007 17:36:40 +0100
Subject: how to write unicode to a txt file?
References: <1169051293.848769.163860@s34g2000cwa.googlegroups.com>
Message-ID: <eoljaa$mf2$02$2@news.t-online.com>

Frank Potter wrote:

> I want to change an srt file to unicode format so mpalyer can display
> Chinese subtitles properly.
> I did it like this:
> 
> txt=open('dmd-guardian-cd1.srt').read()
> txt=unicode(txt,'gb18030')
> open('dmd-guardian-cd1.srt','w').write(txt)
> 
> But it seems that python can't directly write unicode to a file,
> I got and error at the 3rd line:
> UnicodeEncodeError: 'ascii' codec can't encode characters in position
> 85-96: ordinal not in range(128)
> 
> How to save the unicode string to the file, please?
> Thanks!

You have to tell Python what encoding to use (i. e how to translate the
codepoints into bytes):

>>> txt = u"?hnlicher als gew?hnlich ?blich"
>>> import codecs
>>> codecs.open("tmp.txt", "w", "utf8").write(txt)
>>> codecs.open("tmp.txt", "r", "utf8").read()
u'\xe4hnlicher als gew\xf6hnlich \xfcblich'

You would perhaps use 'gb18030' instead of 'utf8'.

Peter




From skip at pobox.com  Tue Jan 16 19:51:15 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 16 Jan 2007 18:51:15 -0600
Subject: Queue and signals
In-Reply-To: <mCcrh.1493$lc5.465@newsfe20.lga>
References: <tmbrh.1492$lc5.386@newsfe20.lga> <mCcrh.1493$lc5.465@newsfe20.lga>
Message-ID: <17837.29443.82120.783476@montanaro.dyndns.org>


    >> Is it legal to use Queue.put in a signal handle and Queue.get in the
    >> main process (no thread)

    hg> PS: and if not is there a way to share data between a "main" and its
    hg> signal in a safe way (write in signal and read in main)

The Queue module was designed to work in multithreaded contexts.  I doubt it
will work as expected in a nonthreaded application.  Given that your
application isn't multithreaded I suspect you can just modify an object that
both your signal handler and the rest of the application reference.  In
particular, there's no reason your signal handler can't be a method of an
instance:

    import signal
    import time

    class MyClass:
        def __init__(self):
            self.alarm_rang = False
            signal.signal(signal.SIGALRM, self.ring_alarm)
            signal.alarm(2)

        def ring_alarm(self, sig, frame):
            self.alarm_rang = True

    obj = MyClass()
    print obj.alarm_rang
    time.sleep(4.0)
    print obj.alarm_rang

Skip


From robert.kern at gmail.com  Sat Jan  6 05:36:27 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 06 Jan 2007 04:36:27 -0600
Subject: howto overload with a NOP (empty statement)
In-Reply-To: <adeb4$459f7a11$d443bb3a$14652@news.speedlinq.nl>
References: <adeb4$459f7a11$d443bb3a$14652@news.speedlinq.nl>
Message-ID: <ennu3g$1tm$1@sea.gmane.org>

Stef Mientki wrote:
> How should I overload / disable a method ?
> In the example below I have defined the class "Power_Supply", derived 
> from baseclass "device".
> The baseclass has a method "execute", which will be implemented in most 
> derived classes, but not in all.
> Now apparently it's not allowed to overload a method with an empty 
> statement.
> I could write a nonsense dummy statement, like "A= 3", but isn't there 
> another way ?

pass

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From mail at microcorp.co.za  Sun Jan 14 05:08:52 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 14 Jan 2007 12:08:52 +0200
Subject: Maths error
References: <eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org>
	<Xns98B7DEC646Ftim111one@216.196.97.136>
Message-ID: <017901c737c6$a4315fe0$03000080@hendrik>

 "Tim Peters" <tim.one at comcast.net> wrote:


> [Nick Maclaren]
> >> ...
> >> Yes, but that wasn't their point.  It was that in (say) iterative
> >> algorithms, the error builds up by a factor of the base at every
> >> step. If it wasn't for the fact that errors build up, almost all
> >> programs could ignore numerical analysis and still get reliable
> >> answers! 
> >>
> >> Actually, my (limited) investigations indicated that such an error
> >> build-up was extremely rare - I could achieve it only in VERY
> >> artificial programs.  But I did find that the errors built up faster
> >> for higher bases, so that a reasonable rule of thumb is that 28
> >> digits with a decimal base was comparable to (say) 80 bits with a
> >> binary base. 
> 
> [Hendrik van Rooyen]
> > I would have thought that this sort of thing was a natural consequence 
> > of rounding errors - if I round (or worse truncate) a binary, I can be 
> > off by at most one, with an expectation of a half of a least 
> > significant digit, while if I use hex digits, my expectation is around
> > eight, and for decimal around five... 
> 
> Which, in all cases, is a half ULP at worst (when rounding -- as 
> everyone does now).
> 
> > So it would seem natural that errors would propagate 
> > faster on big base systems, AOTBE, but this may be 
> > a naive view.. 
> 
> I don't know of any current support for this view.  It the bad old days, 
> such things were often confused by architectures that mixed non-binary 
> bases with "creative" rounding rules (like truncation indeed), and it 
> could be hard to know where to "pin the blame".
> 
> What you will still see stated is variations on Kahan's telegraphic 
> "binary is better than any other radix for error analysis (but not very 
> much)", listed as one of two techincal advantages for binary fp in:
> 
>     http://www.cs.berkeley.edu/~wkahan/MktgMath.pdf
> 
> It's important to note that he says "error analysis", not "error 
> propagation" -- regardless of base in use, rounding is good to <= 1/2 
> ULP.  A fuller elementary explanation of this can be found in David 
> Goldberg's widely available "What Every Computer Scientist Should Know 
> About Floating-Point", in its "Relative Error and Ulps" section.  The 
> short course is that rigorous forward error analysis of fp algorithms is 
> usually framed in terms of relative error:  given a computed 
> approximation x' to the mathematically exact result x, what's the 
> largest possible absolute value of the mathematical
> 
>    r = (x'-x)/x
> 
> (the relative error of x')?  This framework gets used because it's more-
> or-less tractable, starting by assuming inputs are exact (or not, in 
> which case you start by bounding the inputs' relative errors), then 
> successively computing relative errors for each step of the algorithm.  
> Goldberg's paper, and Knuth volume 2, contain many introductory examples 
> of rigorous analysis using this approach.
> 
> Analysis of relative error generally goes along independent of FP base.  
> It's at the end, when you want to transform a statement about relative 
> error into a statement about error as measured by ULPs (units in the 
> last place), where the base comes in strongly.  As Goldberg explains, 
> the larger the fp base the sloppier the relative-error-converted-to-ULPs 
> bound is -- but this is by a constant factor independent of the 
> algorithm being analyzed, hence Kahan's "... better ... but not very 
> much".  In more words from Goldberg:
> 
>     Since epsilon [a measure of relative error] can overestimate the
>     effect of rounding to the nearest floating-point number by the
>     wobble factor of B [the FP base, like 2 for binary or 10 for
>     decimal], error estimates of formulas will be tighter on machines
>     with a small B.
> 
>     When only the order of magnitude of rounding error is of interest,
>     ulps and epsilon may be used interchangeably, since they differ by
>     at most a factor of B.
> 
> So that factor of B is irrelevant to most apps most of the time.  For a 
> combination of an fp algorithm + set of inputs near the edge of giving 
> gibberish results, of course it can be important.  Someone using 
> Python's decimal implementation has an often very effective workaround 
> then, short of writing a more robust fp algorithm:  just boost the 
> precision.
> 

Thanks Tim, for taking the trouble. - really nice explanation.

My basic error of thinking ( ? - more like gut feel ) was that the
bigger bases somehow lose "more bits" at every round, 
forgetting that half a microvolt is still half a microvolt, whether
it is rounded in binary, decimal, or hex...

- Hendrik



From deets at nospam.web.de  Wed Jan 10 05:42:00 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 10 Jan 2007 11:42:00 +0100
Subject: Is there a way to protect a piece of critical code?
References: <mailman.2524.1168424917.32031.python-list@python.org>
Message-ID: <50ju7oF1fqlg6U1@mid.uni-berlin.de>

Hendrik van Rooyen wrote:

> Hi,
> 
> I would like to do the following as one atomic operation:
> 
> 1) Append an item to a list
> 2) Set a Boolean indicator
> 
> It would be almost like getting and holding the GIL,
> to prevent a thread swap out between the two operations.
> - sort of the inverted function than for which the GIL
> seems to be used, which looks like "let go", get control
> back via return from blocking I/O, and then "re - acquire"
> 
> Is this "reversed" usage possible?
> Is there some way to prevent thread swapping?
> 
> The question arises in the context of a multi threaded
> environment where the list is used as a single producer,
> single consumer queue - I can solve my problem in various
> ways, of which this is one, and I am curious as to if it is
> possible to prevent a thread swap from inside the thread.

There have been discussions to make the GIL available from python code. But
it is considered a implementation detail - and this is the reason you can't
do what you need the way you want to.

Just use a regular lock - in the end, that is what the GIL is anyway.

And besides that, you don't "get" anything by your way, as the
thread-scheduling itself isn't controlled by python - instead the OS
threading implementation is used.

Diez


From bdesth.quelquechose at free.quelquepart.fr  Sun Jan  7 17:11:59 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 07 Jan 2007 23:11:59 +0100
Subject: how to find the longst element list of lists
In-Reply-To: <Vwdoh.223$L06.180@nntpserver.swip.net>
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
Message-ID: <45a169f0$0$309$426a34cc@news.free.fr>

Michael M. a ?crit :
> How to find the longst element list of lists?

For what definition of "find" ? You want the lenght of the longest 
sublist, it's index, or a reference to it ?

> I think, there should be an easier way then this:
> 
>   s1 = ["q", "e", "d"]
>   s2 = ["a", "b"]
>   s3 = ["a", "b", "c", "d"]

Err... this makes three distinct lists, not a list of lists.

>   if len(s1) >= len(s2) and len(s1) >= len(s3):
>     sx1=s1  ## s1 ist l?ngster
>     if len(s2) >= len(s3):
>       sx2=s2
>       sx3=s3
>     else:
>       sx2=s3
>       sx3=s2
> 
(snip repeated code)

Looks like it would be time to learn how to factor out repetitions...

> After, the list ist sorted:
> 
>   sx1 = ["a", "b", "c", "d"]
>   sx2 = ["q", "e", "d"]
>   sx3 = ["a", "b"]
> 

This is still not a list of lists. Now for the answer, sorted() is your 
friend:

print sorted([s1, s2, s3], key=list.__len__, reverse=True)
=> [['a', 'b', 'c', 'd'], ['q', 'e', 'd'], ['a', 'b']]

# Or if you really want sx1, sx2 and sx3:
sx1, sx2, sx3 = sorted([s1, s2, s3], key=list.__len__, reverse=True)


Is that easier enough ?-)


From tinaweb at bestemselv.com  Tue Jan 23 05:31:20 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Tue, 23 Jan 2007 11:31:20 +0100
Subject: PyQt4 strangeness
Message-ID: <mLSdnfIBYsFkfijYRVnzvQ@telenor.com>

I'm trying to 'convert' my self from Qt3 to Qt4 (it rocks!) and one 
thing seem strange:
With Qt3 I usually did "from qt import *", but this does not seem to 
work with Qt4. I have to use "from PyQt4 import QtGui , QtCore" and also 
have to use "QtCore.something".

Like when connecting a button:

	self.connect(self.ui.testButton, QtCore.SIGNAL("clicked()"), 
self.doSomething)

Anyone know why this is? Or am I missing something very basic here? (I'm 
still very much a noob I guess)

I'm using the Debian packages by the way.

Thanks
Tina


From goofyheadedpunk at gmail.com  Tue Jan  9 23:47:20 2007
From: goofyheadedpunk at gmail.com (Brian L. Troutwine)
Date: 9 Jan 2007 20:47:20 -0800
Subject: pgen2 use questions.
Message-ID: <1168404440.281588.233910@k58g2000hse.googlegroups.com>

I happened to stumble upon Guido's announcement of his python2 to
python3 refactoring tool earlier today
(http://mail.python.org/pipermail/python-3000/2006-December/005102.html),
and, after playing with it a bit, I have some use questions as I don't
quite understand how the pattern matching language works.

In some instances I cannot grok matching certain sorts of patterns,
sometimes very simple ones. For instance, how is the following
incorrect for matching pass statements?

    pass_stmt< 'pass'>

If I wanted to insert "# Do nothing, and well." after each pass
statement how would the transformation work?

Why would this pattern not match function statements?

    funcdef<
               decorators < decs=any >
               'def'
               atom < def_name=NAME >
               parameters < pars=any >
               ':'
               suite < suite_content=any >
               >

If I wanted to change the function name how would I do so? How about
parts of the function body?



From Thomas.Ploch at gmx.net  Tue Jan  9 02:23:26 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Tue, 09 Jan 2007 08:23:26 +0100
Subject: How to write temporary data to file?
In-Reply-To: <1168326437.416524.154770@v33g2000cwv.googlegroups.com>
References: <mailman.2461.1168316179.32031.python-list@python.org>	<1168324907.803841.79020@42g2000cwt.googlegroups.com>	<mailman.2465.1168325623.32031.python-list@python.org>
	<1168326437.416524.154770@v33g2000cwv.googlegroups.com>
Message-ID: <45A342EE.3060508@gmx.net>

Ravi Teja schrieb:
> Thomas Ploch wrote:
>> Ravi Teja schrieb:
>>> Thomas Ploch wrote:
>>>> Hi folks,
>>>>
>>>> I have a data structure that looks like this:
>>>>
>>>> d = {
>>>> 	'url1': {
>>>> 		'emails': ['a', 'b', 'c',...],
>>>> 		'matches': ['d', 'e', 'f',...]
>>>> 	},
>>>> 	'url2': {...
>>>> }
>>>>
>>>> This dictionary will get _very_ big, so I want to write it somehow to a
>>>> file after it has grown to a certain size.
>>>>
>>>> How would I achieve that?
>>>>
>>>> Thanks,
>>>> Thomas
>>> Pickle/cPickle are standard library modules that can persist data.
>>> But in this case, I would recommend ZODB/Durus.
>>>
>>> (Your code example scares me. I hope you have benevolent purposes for
>>> that application.)
>>>
>>> Ravi Teja.
>>>
>> Thanks, but why is this code example scaring you?
>>
>> Thomas
> 
> The code indicates that you are trying to harvest a _very_ (as you put
> it) large set of email addresses from web pages. With my limited
> imagination, I can think of only one group of people who would need to
> do that. But considering that you write good English, you must not be
> one of those mean people that needed me to get a new email account just
> for posting to Usenet :-).
> 
> Ravi Teja.
> 

Oh, well, yes you are right that this application is able to harvest
email addresses. But it can do much more than that. It has a text
matching engine, that according to given meta keywords can scan or not
scan documents in the web and harvest all kinds of information. It can
also be fed with callbacks for each of the Content-Types. I know that
the email matching engine is a kind of a 'grey zone', and I asked
myself, if it needs the email stuff. But I mean you could easily include
the email regex to the text matching engine yourself, so I decided to
add this functionality (it is 'OFF' by default :-) ).

Thomas

P.S.: No, I am a good person.



From tim at tdw.net  Fri Jan 12 12:42:42 2007
From: tim at tdw.net (Tim Williams)
Date: Fri, 12 Jan 2007 17:42:42 +0000
Subject: parsing a file name
In-Reply-To: <R62720487.205.1495.1@mxextra>
References: <R62720487.205.1495.1@mxextra>
Message-ID: <9afea2ac0701120942w72a853b9s4ad24987c426e867@mail.gmail.com>

On 12 Jan 2007 09:16:51 -0800, CSUIDL PROGRAMMEr <syedamjad_a at yahoo.com> wrote:
> I have a filename
> cairo-2.3.4.src.rpm
> Is there any way i can only get 2.3.4 from this file name

Is this a one off,  or do you have to process multiple files with similar names?


-- 

Tim Williams


From jstroud at mbi.ucla.edu  Tue Jan 16 18:39:17 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 16 Jan 2007 15:39:17 -0800
Subject: How can i eval subindex on list[ ][ ] ?
In-Reply-To: <1168988937.512029.192800@q2g2000cwa.googlegroups.com>
References: <1168988937.512029.192800@q2g2000cwa.googlegroups.com>
Message-ID: <eojnn5$1vo$1@zinnia.noc.ucla.edu>

jairodsl wrote:
> Excuse me, i was trying in too many ways but i couldnt access subindex
> on a list , the problem is the next:
> 
> I have
> 
> indif=[[0,'A'],[1,'B'],[2,'C'],[3,'D']]
> 
> and
> 
> indic=[[0,'B'],[1,'C'],[2,'D'],[3,'E']]
> 
> i need to eval if indic[i][j] is equal to indif[i][j]
> 
> I used a double for but i had got "list index out of range". How can i
> do ???
> 
> Thanks a lot,
> 
> Cordially,
> 
> jDSL
> 

py> i = 1
py> j = 0
py> indif[i][j] == indic[i][j]
True


Works for me.

James


From nagle at animats.com  Sun Jan 28 14:46:41 2007
From: nagle at animats.com (John Nagle)
Date: Sun, 28 Jan 2007 19:46:41 GMT
Subject: Do I need Python to run Blender correctly?
In-Reply-To: <9TYuh.3468$4W5.752@newsfe10.phx>
References: <tRZth.2027$pH3.140@newsfe12.phx>
	<5%4uh.75582$wP1.6882@newssvr14.news.prodigy.net>
	<joTuh.3445$4W5.1382@newsfe10.phx>
	<ssTuh.36083$QU1.26111@newssvr22.news.prodigy.net>
	<9TYuh.3468$4W5.752@newsfe10.phx>
Message-ID: <B47vh.66904$qO4.21051@newssvr13.news.prodigy.net>

AKA gray asphalt wrote:
> "John Nagle" <nagle at animats.com> wrote in message 
> news:ssTuh.36083$QU1.26111 at newssvr22.news.prodigy.net...

> Is the manual you refer to the group project on blender.org or the $ manual 
> like the one on Ebay?
> 
    The "Blender 2.3 Guide" book. Also, if you're going to program the thing,
the "Blender GameKit" book is a big help.

    Unless you have two screens, the online manual gets in your way.

    This really should go in a Blender newsgroup or forum.

					John Nagle


From nobody at localhost.localdomain  Fri Jan 12 05:50:21 2007
From: nobody at localhost.localdomain (Steven Wayne)
Date: Fri, 12 Jan 2007 04:50:21 -0600
Subject: Learning Python book, new edition?
References: <mailman.2635.1168592793.32031.python-list@python.org>
Message-ID: <slrneqepvc.c32.swayne@wayne.powernet>

On Thu, 11 Jan 2007 16:42:34 -0600, Demel, Jeff
	<Jeff.Demel at JavelinDirect.com> wrote:
> John wrote:
>>So what happens with google bots etc... Information provided 
>>in the email could be helpful to others that are NOT the original 
>> recipient.  And what happens to the archive stuff?
>
> I will forward your response to our crack legal department.  Perhaps
> they can help you with your very astute questions.
>
> -Jeff
> This email is intended only for the individual or entity to which it is
> addressed.

Hi,

Don't take this the wrong way, but this isn't an email, it's a usenet
posting.

I'm also not the "individual or entity to which it is addressed" because
I read it from a news server and it was addressed to "comp.lang.python".

>            This email may contain information that is privileged,
> confidential or otherwise protected from disclosure.

Then you would do well to not publish it in a public forum.

>                                                        Dissemination,
> distribution or copying of this e-mail or any attachments by anyone
> other than the intended recipient, or an employee or agent responsible
> for delivering the message to the intended recipient, is prohibited.

So if this /were/ actually an email you've just given permission for an
admin of any mail server the email passes through to disseminate or copy
it.

For those not aware:

Disseminate:

Verb:  disseminate - cause to become widely known; "spread information";
"circulate a rumor"; "broadcast the news"

>                                                                      If
> you are not the intended recipient of this message or the employee or
> agent responsible for delivery of this email to the intended recipient,
> please notify the sender by replying to this message and then delete it
> from your system. Any use, dissemination, distribution, or reproduction
> of this message by unintended recipients is strictly prohibited and may
> be unlawful.

Unlawful how? You've already given permission for an "agent responsible
for delivering the message" to broadcast it around the world.

Sorry for the rant, but I'm an email admin and I've just been told about
the change to UK law.

I'm giving our legal department even more grief.

Steven
-- 
 .''`.
: :'  :
`. `'`
  `-


From laurent.pointal at limsi.fr  Tue Jan 23 04:06:07 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 23 Jan 2007 10:06:07 +0100
Subject: Python Windows Editors
In-Reply-To: <7d773$45b5cb01$83aef404$30645@news2.tudelft.nl>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<ep4gp8$het$1@upsn250.cri.u-psud.fr>
	<7d773$45b5cb01$83aef404$30645@news2.tudelft.nl>
Message-ID: <ep4k2d$jls$1@upsn250.cri.u-psud.fr>

stef a ?crit :
> Laurent Pointal wrote:
>> W. Watson a ?crit :
>>  
>>> I downloaded python-2.5.msi and installed it. I believe its editor is
>>> IDE. I understand there's a Win editor called pythonwin. I believe it's
>>> in the download pywin32-210.win32-py2.5.exe, but I'm not sure if this
>>> exe file has just the editor or all of Python. Comments? If not how do I
>>> get the PythonWin editor by itself?
>>>
>>>     
>> Have you take a look at the IDEs page in the Python Wiki (python.org)?
>>
>> http://wiki.python.org/moin/IntegratedDevelopmentEnvironments
>>
>>   
> just what I said, TOO many ;-)

Yes, test some, and choose one.
[personnaly, I use Notepad++ on Windows, and Kate on Linux, just
editors, not IDEs]

> and of course how do you keep these pages up-to-date ?
> Zeus (commercial) isn't mentioned ...

...its a Wiki... click the right link and update it:
http://wiki.python.org/moin/IntegratedDevelopmentEnvironments?action=edit

> SPE which has great credits, but can't be found, and if you find it
> somewhere, no manual and it crashes within 30 seconds (repeatly)  ;-)
> 
> Not an easy task I guess,
> but it would be nice to have some voting system,
> (maybe only to allow voting when you have compared at least 2 programs)
> that would represent the current state,
> and in which new programs would have a fair chance to start.

Its difficult, apart from their stability (which can get better or bad
on the time, upen their evolution and the evolution of the libraries
they use), its a large part of personnal taste.

IMHO you can only have functionnal comparison of such tools. I started a
synthesis page of editors/IDEs functionnalities in the pythonfr wiki
(french) some (long) time ago...

http://wikipython.flibuste.net/moin.py/EditeursEtIDESynthese

But a Wiki form seem to not be the best way for such comparison... a
dynamic page with a database and some dynamic request would be better.

A+

Laurent.


From webraviteja at gmail.com  Fri Jan 12 14:11:21 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 12 Jan 2007 11:11:21 -0800
Subject: I need to consume a .NET web service in a Python client
In-Reply-To: <1168626439.257622.134700@38g2000cwa.googlegroups.com>
References: <1168626439.257622.134700@38g2000cwa.googlegroups.com>
Message-ID: <1168629081.271619.316370@s34g2000cwa.googlegroups.com>


mohit wrote:
> Hello,
>
> I am a .NET developer experimenting with Python.
> I need to consume a .NET web service in a Python client. how do I go
> about it?
> which libraries do i need?
> pointers to help me get started would be much appreciated.
> I am just a newbie to the Python world so please be bear with my novice
> queries.
>
> thanks in advance,
> Mohit


Start Here
http://www.diveintopython.org/soap_web_services/index.html
Example Client
http://www.diveintopython.org/soap_web_services/first_steps.html

Ravi Teja



From Barry.Carroll at psc.com  Fri Jan 19 16:43:52 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Fri, 19 Jan 2007 13:43:52 -0800
Subject: OT Annoying Habits (Was: when format strings attack)
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A9C@eugsrv400.psc.pscnet.com>

Hello again.

First off, Aahz is absolutely right. It is my choice, just as it is his
choice what to read and what to ignore.  My reply was about the fuss,
not the choice.  

Secondly, can someone point me to the Standard Usenet Convention that
mandates against top-posting.  This is not sarcasm; I would really like
to see it.  You see, I recently returned to Usenet after a LONG absence.
When I was last a regular Usenet citizen the Internet was new, GUI
interfaces were experimental and the World Wide Web didn't exist yet.
Newsreader software was text-based.  Top-posting was the common
practice, because it was the most convenient: you didn't have to page
through an arbitrarily large number of messages, most of which you'd
already read umpteen times, to get to the new stuff you were interested
in.  

So I'd really like to know what the standard is now.  I like to know
which rules I'm choosing to break.  ;^)

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed


> -----Original Message-----
> From: Aahz [mailto:aahz at pythoncraft.com]
> Sent: Friday, January 19, 2007 1:12 PM
> To: python-list at python.org
> Subject: Re: OT Annoying Habits (Was: when format strings attack)
> 
> In article <mailman.2916.1169240529.32031.python-list at python.org>,
> Carroll, Barry <Barry.Carroll at psc.com> wrote:
> >
> >Personally, I don't think top-posting is the most annoying newsgroup
> >habit.  I think it's making a big fuss about minor inconveniences.
=20
> 
> Thing is, nobody will ignore your posts for following standard Usenet
> conventions, but some of us will definitely ignore your posts if you
> don't.  It's your choice how much attention you want.
> --
> Aahz (aahz at pythoncraft.com)           <*>
> http://www.pythoncraft.com/
> 
> Help a hearing-impaired person: http://rule6.info/hearing.html




From bj_666 at gmx.net  Fri Jan 19 07:11:06 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 19 Jan 2007 13:11:06 +0100
Subject: Standard streams
References: <1169208432.786099.199690@11g2000cwr.googlegroups.com>
Message-ID: <pan.2007.01.19.12.11.06.97175@gmx.net>

In <1169208432.786099.199690 at 11g2000cwr.googlegroups.com>, raghu wrote:

> what is standard streams in case of python?

Do you mean `sys.stdin`, `sys.stdout` ans `sys.stderr`?

Ciao,
	Marc 'BlackJack' Rintsch



From GatlingGun at gmail.com  Wed Jan 31 11:48:01 2007
From: GatlingGun at gmail.com (TOXiC)
Date: 31 Jan 2007 08:48:01 -0800
Subject: Regex with ASCII and non-ASCII chars
In-Reply-To: <1170261017.718665.179530@a75g2000cwd.googlegroups.com>
References: <1170243969.504255.134100@v33g2000cwv.googlegroups.com>
	<epq6k8$po8$01$1@news.t-online.com>
	<1170257547.041535.20770@a75g2000cwd.googlegroups.com>
	<epqee8$l9e$00$1@news.t-online.com>
	<1170261017.718665.179530@a75g2000cwd.googlegroups.com>
Message-ID: <1170262081.746655.174790@m58g2000cwm.googlegroups.com>

On 31 Gen, 17:30, "TOXiC" <Gatling... at gmail.com> wrote:
> It wont work with utf-8,iso or ascii...

I think the best way is to search hex value in the file stream but I
tryed (in the regex) \hxx but it don't work...



From richmoore44 at gmail.com  Tue Jan  9 08:02:08 2007
From: richmoore44 at gmail.com (richmoore44 at gmail.com)
Date: 9 Jan 2007 05:02:08 -0800
Subject: Execute binary code
In-Reply-To: <slrneq6vga.tcj.grahn+nntp@frailea.sa.invalid>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<1168288176.054142.232780@s80g2000cwa.googlegroups.com>
	<slrneq6vga.tcj.grahn+nntp@frailea.sa.invalid>
Message-ID: <1168347728.421860.4820@v33g2000cwv.googlegroups.com>


Jorgen Grahn wrote:

> On 8 Jan 2007 12:29:36 -0800, olsongt at verizon.net <olsongt at verizon.net> wrote:
> For what it's worth[1], under Unix it /is/ impossible. The only way to bring in
> new code (short of dynamic libraries) is to call exec(2) or its variations,
> and all need a file system object to load the code from.

That's totally untrue, how do you think a JIT compiler works? For
example you can generate x86 assembler on the fly and call it using
pyASM see http://mysite.verizon.net/olsongt/usersGuide.html

Cheers

Rich.



From hg at nospam.org  Fri Jan  5 04:29:24 2007
From: hg at nospam.org (hg)
Date: Fri, 05 Jan 2007 10:29:24 +0100
Subject: find a .py path
References: <nKunh.45586$gl2.35454@newsfe16.lga>
	<mailman.2327.1168013774.32031.python-list@python.org>
Message-ID: <v1vnh.282$rv1.133@newsfe21.lga>

Laszlo Nagy wrote:

> hg i'rta:
>> Hi,
>>
>> Is there an easy way for a script being executed (from anywhere) to know
>> where is is ... something in os.path ?
>>   
> __file__
> 
> You can also use os.argv[0] but that is not the same...
> 
> Laszlo
Thanks



From steve at REMOVE.THIS.cybersource.com.au  Mon Jan  1 07:16:21 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 01 Jan 2007 23:16:21 +1100
Subject: OO question
References: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
	<pan.2007.01.01.05.37.52.466540@REMOVE.THIS.cybersource.com.au>
	<1167631258.804660.154490@n51g2000cwc.googlegroups.com>
Message-ID: <pan.2007.01.01.12.16.19.706801@REMOVE.THIS.cybersource.com.au>

On Sun, 31 Dec 2006 22:00:58 -0800, Paddy wrote:

>>     def save(self, filename):
>>         self.currentfile = file(filename, "w")
>>         for address in self.addresses:
>>             self.save_one_address(address.export())
>>         self.currentfile.close()
>>         self.currentfile = None
>
> Small addition.
> If a class does a save then it should also do the load of the data too.

What, you've never heard of a write-only file?



-- 
Steven.



From yinglcs at gmail.com  Mon Jan 15 19:28:10 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: 15 Jan 2007 16:28:10 -0800
Subject: Can't find module named 'svn' in python
Message-ID: <1168907290.539976.117270@51g2000cwl.googlegroups.com>

Hi,

i have a simple test which tries to load 'svn' moddule.

# python -c "from svn import client"
Traceback (most recent call last):
 File "<string>", line 1, in ?
ImportError: No module named svn

I have checked I have sub-directories 'libsvn', 'svn' under
/usr/local/lib/svn-python/

 cd /usr/local/lib/svn-python/
[root at localhost svn-python]# ls
libsvn  svn

But python still can't find it. Please tell me what am I missing. I
appreciate your help.



From rzantow at gmail.com  Sat Jan  6 11:34:01 2007
From: rzantow at gmail.com (rzed)
Date: Sat, 06 Jan 2007 11:34:01 -0500
Subject: Just Getting Started with Python on MS XP Pro
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
	<1168064599.558820.9410@42g2000cwt.googlegroups.com>
Message-ID: <Xns98B075A8EC167rzantowgmailcom@208.49.80.253>

DouhetSukd at gmail.com wrote in
news:1168064599.558820.9410 at 42g2000cwt.googlegroups.com: 

> Wise choice + welcome to the club.

Seconded.

> The only real XP drawback is that Python is not bundled on
> Windows, while it is included with OS X and most (all?) Linux
> distros. 
> 

My computer does, in fact, include a Python 2.2.1 installation, 
which the manufacturer uses internally.

> 2.  use any ol' text editor that _you_ are familiar with, save
> to file, and python <file> under DOS.  later on you can always
> pick an editor. i prefer eclipse + pydev, yes, even on windows.
> 
> personally, i find pythonwin _great_ to test out code
> interactively, mediocre to write lots of code with and
> occasionally handy to debug code in.
> 
> if you hate typing python <file> under DOS, then I guess you
> will have to run programs from pythonwin.
> 

Not so, but it takes a little setup. If I want to run a Python 
program named, say, "fixthis.py", I can invoke it by typing 
"fixthis.py" at the command-line prompt (if I'm running cmd.exe), 
or by clicking the icon in Windows Explorer. To make the command-
line option work, I have to have file associations set so that .py 
files open with python (and .pyw files open with pythonw, for that 
matter). I *think* this is done at install time, though I may have 
done that separately.

There is also an environment variable called "pathext", which is 
just a list of extensions the system recognizes as being 
executable in some way. if you add .py and .pyw to that list, then 
all you have to type at the command line is "fixthis" to get that 
Python program to run.

I note that I have had my Python root and Python/Scripts directory 
on my path at times. There may be some packages that require these 
things, but what I talked about in the previous two paragraphs 
doesn't require pythonpath to be set specially.

(Fiddling around) Ah! If you want to invoke the interactive python 
shell, you will probably want to add the root location to your 
path, so you can type
> python
... to invoke it, rather than
> c:\python25\python
... and something similar may be true for the Scripts 
subdirectory.

-- 
rzed


From s.mientki at id.umcn.nl  Wed Jan 31 11:20:31 2007
From: s.mientki at id.umcn.nl (stef)
Date: Wed, 31 Jan 2007 17:20:31 +0100
Subject: another newbie question: why should you use "*args" ?
In-Reply-To: <pan.2007.01.31.16.01.58.244097@gmx.net>
References: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
	<mailman.3346.1170254361.32031.python-list@python.org>
	<4b4a3$45c0b94c$83aef404$20934@news1.tudelft.nl>
	<pan.2007.01.31.16.01.58.244097@gmx.net>
Message-ID: <9f3d1$45c0c1cf$83aef404$22682@news1.tudelft.nl>


>> I would love that,
>> but please tell me how (I need an integer counter for something else too):
>>
>> def chunk_plot(*args):
>>     if len(args) == 1:  list = args[0]
>>     else:               list = args
>>  
>>     color = ['g','r','b','y','m']
>>     plot ( list[0], color[0])
>>     hold (True)
>>     for i in range  (  1,  len(list)  ):
>>          plot  (  list[i],  color[i]  )
>>     
>
> No need for the counter here.
>
> for args in zip(list[1:], color[1:]):
>     plot(*args)
>
>   
that looks nice, thanks!
All the other people also thanks, "enumerate" looks also better than 
range(len(  nice !
> Ciao,
> 	Marc 'BlackJack' Rintsch
>   

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070131/b05d902b/attachment.html>

From redvasily at gmail.com  Sat Jan  6 05:36:26 2007
From: redvasily at gmail.com (Vasily Sulatskov)
Date: 6 Jan 2007 02:36:26 -0800
Subject: howto overload with a NOP (empty statement)
In-Reply-To: <adeb4$459f7a11$d443bb3a$14652@news.speedlinq.nl>
References: <adeb4$459f7a11$d443bb3a$14652@news.speedlinq.nl>
Message-ID: <1168079786.093590.299570@v33g2000cwv.googlegroups.com>

class Power_Supply (device):
    def execute (self):
        pass

Stef Mientki wrote:
> How should I overload / disable a method ?
> In the example below I have defined the class "Power_Supply", derived
> from baseclass "device".
> The baseclass has a method "execute", which will be implemented in most
> derived classes, but not in all.
> Now apparently it's not allowed to overload a method with an empty
> statement.
> I could write a nonsense dummy statement, like "A= 3", but isn't there
> another way ?
>
> thanks, Stef Mientki
>
> class device:
>    def execute (self):
>      print 'execute not yet implemented for', self.Name
> 
> 
> class Power_Supply (device):
>    def execute (self): ;



From pythonnews at nospam.jmbc.fr  Wed Jan 24 10:36:09 2007
From: pythonnews at nospam.jmbc.fr (jean-michel bain-cornu)
Date: Wed, 24 Jan 2007 16:36:09 +0100
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <DAKth.286299$Pv5.99355@newsfe17.lga>
References: <ep60jp$63v$1@aioe.org> <45B76FE8.5080701@codebykevin.com>
	<dc1aa$45b77070$4275d90a$10460@FUSE.NET>
	<DAKth.286299$Pv5.99355@newsfe17.lga>
Message-ID: <45b77d02$0$21145$7a628cd7@news.club-internet.fr>

Hi
> 
> Just for info - one of the reasons I stopped using Tkinter a few years ago
> was for the lack of print support (preview ...) - is there such an
> extension today ?
> 
Same for me, it was a point for what I choosed wx.
Nowadays, I'd say users commonly accept to get pdf reports instead of 
direct printing, so it's not so much important.
Regards,
jm


From dudds at netspace.net.au  Sat Jan 27 09:00:19 2007
From: dudds at netspace.net.au (dudds)
Date: 27 Jan 2007 06:00:19 -0800
Subject: wx Python event question
In-Reply-To: <1169892089.110196.98010@a75g2000cwd.googlegroups.com>
References: <1169881014.463339.257190@v45g2000cwv.googlegroups.com>
	<1169892089.110196.98010@a75g2000cwd.googlegroups.com>
Message-ID: <1169906419.715011.245660@a75g2000cwd.googlegroups.com>

Thanks Steve.

On Jan 27, 8:01 pm, "Steve" <stephen... at gmail.com> wrote:
> use wx.Timer - you bind a method to a timer event and define the
> timer's interval when you start it
>
> timer = wx.Timer(self, -1)
> self.Bind(wx.EVT_TIMER, self.timerMethod, timer)
> timer.Start(500)
>
> On Jan 27, 5:56 pm, "dudds" <d... at netspace.net.au> wrote:
>
> > Hi I really haven't used wxPython before and I was just wondering if
> > there was some sort of timer event that can be used. For example if I
> > have a database that I want to query at regular intervals and display
> > the results in a window is that possibly to do under a wx Python
> > program?
>
> > So far I have come across certain event handlers, but they all seem to
> > wait for something to happen, like moving the mouse, clicking on a
> > button etc. I just want to display the results of a query every so
> > often automatically without having to press a button to do so.
>
> > I'm not looking for a complete solution as I'm doing this so I can
> > teach myself Python, but a bit of a hint or a nudge in the right
> > direction would be great.



From tiedon_jano at hotmail.com  Sun Jan  7 15:14:15 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Sun, 07 Jan 2007 20:14:15 GMT
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <nKboh.11774$ZT3.8998@newssvr19.news.prodigy.com>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
	<mailman.2332.1168016502.32031.python-list@python.org>
	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>
	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>
	<yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>
	<mailman.2367.1168100759.32031.python-list@python.org>
	<fK_nh.25689$QU1.17301@newssvr22.news.prodigy.net>
	<w03oh.46$_k2.22@read3.inet.fi>
	<P69oh.32493$Gr2.29258@newssvr21.news.prodigy.net>
	<1168194009.220437.286210@q40g2000cwq.googlegroups.com>
	<nKboh.11774$ZT3.8998@newssvr19.news.prodigy.com>
Message-ID: <rwcoh.266$_k2.29@read3.inet.fi>

W. Watson kirjoitti:
> Gabriel Genellina wrote:
>> On 7 ene, 13:22, "W. Watson" <wolf_tra... at invalid.com> wrote:
>>
>>>>>> https://sourceforge.net/projects/pywin32/
>>
>>> As I understand it, there are two files I'm after: 1. python 
>>> interpreter,
>>> and 2. a python editor. It's #2 that I'm having trouble downloading. The
>>> link is broken.
>>
>> The above link should work. Follow the instructions in a previous post.
>> Note that in the last step, you have to choose a mirror for
>> downloading; that mirrow might be down or out-of-sync so you might get
>> an error there. Choose another mirrorr...
>>
>> Note that you dont *need* PythonWin in order to use Python on Windows.
>> The standard Python distribution works fine. Even includes a Python
>> editor (IDLE) but you can use whichever editor you like to write your
>> code (even Notepad...)
>>
> We seem to be looping. I have the Python interpreter. I would like the 
> pythonwin editor. The download link doesn't work on SourceForge. Where 
> can I get it? If not there, where? If it can't be obtained, then I'll go 
> to the default editor built into python-2.5.msi.
> 
> 
>          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
>              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
>               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet
> 
>              ""I do not fear death. I had been dead for billions
>                and billions of years before I was born, and had
>                not suffered the slightest inconvenience from it."
>                    -- Mark Twain (a nod to evolution)

Trying to break the loop:

The above link works for me. I've tried it numerous times during this 
looping. Clicking the link pops up a security warning informing that the 
browser is going to enter "https mode". Do you get that pop-up?

When I accept the pop-up, I get a page containing a green rectangle 
"button". When I click it, I get another page in which I have to click 
download to go to the actual download page.

If this doesn't work for you there must be something wrong with your 
configuration.

HTH,
Jussi


From vamsi.hr.rec at gmail.com  Thu Jan 11 02:09:19 2007
From: vamsi.hr.rec at gmail.com (Software Hiring)
Date: 10 Jan 2007 23:09:19 -0800
Subject: Urgent Openings with the World's Leading Software Company !!!
Message-ID: <1168499359.596195.286240@77g2000hsv.googlegroups.com>

Hi Friends,

Hope you're doing great. We are looking for Software Professionals
with about 7 years of experience and willing to work for the World's
Biggest Software Company - Microsoft.

We have a variety of jobs across different verticals at Microsoft India
Development Center (MSIDC) based at HITEC City in Hyderabad, India.
This is a world-class facility that provides State-of-the-Art
Technology, Infrastructure and Recreational Facilities that are on par
with Microsoft Head Quarters in Redmond, WA.

If you're interested in relocating to India for such a good
opportunity and be a part of the World's Best Software Company and if
you have good skill sets  in:

C, C++, C#, Java (for .Net Platform or Visual Studio)

OR

C, C++, Java, Product Development (for MS RFID Infrastructure
PathFinder - Adapters)

OR

C, C++, driver or kernel, Linux or Unix (for Windows Serviceability)

Please send your updated resume or contact us at:
vamsi.hr.rec at gmail.com

Also, if you are aware of any experienced Software Professionals who
could be your friends, family members or colleagues who are willing to
relocate to India for this opportunity, please forward this e-mail to
them.

Please visit http://www.microsoft.com/india/careers/idc.aspx to know
more about Microsoft India Development Center and other positions
available at MSIDC.


Sincerely,
Vamsi Narayana
vamsi.hr.rec at gmail.com



From jacques.cazotte at laposte.net  Tue Jan 30 11:03:28 2007
From: jacques.cazotte at laposte.net (Jacques Cazotte)
Date: Tue, 30 Jan 2007 17:03:28 +0100
Subject: Please take me off the list
In-Reply-To: <mailman.3307.1170170886.32031.python-list@python.org>
References: <mailman.3307.1170170886.32031.python-list@python.org>
Message-ID: <45bf6c5a$0$28762$426a74cc@news.free.fr>

Daniel kavic a ?crit :
> Sorry to waste email space , but I wish to be off this list because I have tried python and it is too difficult for me.
> 
> -Dan
Hi Daniel,
My name is God, and I am quite new to mailing lists.
I sometimes wonder wether computerizing the whole thing was a good
idea.
Do You want to give up the List downthere, and proceed to heavens, or
be completely erased?
Do You want me to remove python from the list of available langages?
(I didnt even remember I had done this one).
Without any answer from You within 1000 years, we shall transmit your
demand to the Comitee.



From carsten at uniqsys.com  Sat Jan  6 11:15:18 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 06 Jan 2007 11:15:18 -0500
Subject: Python re expr from Perl to Python
In-Reply-To: <GzOnh.112$a81.91@nntpserver.swip.net>
References: <GzOnh.112$a81.91@nntpserver.swip.net>
Message-ID: <1168100118.3341.9.camel@localhost.localdomain>

On Sat, 2007-01-06 at 15:43 +0100, Michael M. wrote:
> In Perl, it was:
> 
> 
>    ## Example: "Abc | def | ghi | jkl"
>    ##       -> "Abc ghi jkl"
>    ## Take only the text betewwn the 2nd pipe (=cut the text in the 1st 
> pipe).
>    $na =~ s/\ \|(.*?)\ \|(.*?)\ \|/$2/g;
> 
>    ## -- remove [ and ] in text
>    $na =~ s/\[//g;
>    $na =~ s/\]//g;
>    # print "DEB: \"$na\"\n";
> 
> 
> # input string
> na="Abc | def | ghi | jkl [gugu]"
> # output
> na="Abc ghi jkl gugu"
> 
> 
> How is it done in Python?

Here's an almost literal translation:

##################################################
import re
na = re.sub(r"\ \|(.*?)\ \|(.*?)\ \|", r"\2", na)
na = na.replace("[", "")
na = na.replace("]", "")
##################################################

Background information on regular expressions in Python can be found
here:

http://www.amk.ca/python/howto/regex/
http://docs.python.org/lib/module-re.html

Hope this helps,

Carsten.




From paul.sijben at xs4all.nl  Wed Jan 10 02:38:18 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Wed, 10 Jan 2007 08:38:18 +0100
Subject: maximum number of threads
Message-ID: <45a497ec$0$331$e4fe514c@news.xs4all.nl>

I have a server in Python 2.5 that generates a lot of threads. It is
running on a linux server (Fedora Core 6).

The server quickly runs out of threads.

I am seeing the following error.

  File "/home/sijben/ORCA/src/libmercury_mt.py", line 565, in __init__
    MercuryObject.__init__(self,mylink)
  File "/home/sijben/ORCA/src/libmercury_mt.py", line 223, in __init__
    self.start()
  File "/usr/local/lib/python2.5/threading.py", line 434, in start
    _start_new_thread(self.__bootstrap, ())
error: can't start new thread


Does anyone know what it going on here and how I can ensure that I have
all the threads I need?

Paul


From bearophileHUGS at lycos.com  Thu Jan 25 06:06:42 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 25 Jan 2007 03:06:42 -0800
Subject: str and __setitem__
In-Reply-To: <epa1eg$q5v$01$1@news.t-online.com>
References: <Xns98C372B2DD26Btoreriknpolarno@129.242.5.222>
	<epa1eg$q5v$01$1@news.t-online.com>
Message-ID: <1169723202.289924.63650@m58g2000cwm.googlegroups.com>

Peter Otten:
> >>> class mutable_str(object):...     def __init__(self, value):
> ...             self._value = value
> ...     def __setitem__(self, index, value):
> ...             self._value = self._value[:index] + value +
> self._value[index+1:]
> ...     def __str__(self):
> ...             return self._value
> ...>>> a = mutable_str("123")
> >>> a[1] = "x"
> >>> print a

For this purpose an array may be better, if you have to change it often
and print is only once in a while:

from array import array
a = array("c", "123")
a[1] = "x"
print a

The OP can also use a class, if some other methods are needed:

from array import array

class mutable_str(object):
    def __init__(self, value):
        self._value = array("c", value)
    def __setitem__(self, index, value):
        self._value[index] = value
    def __str__(self):
        return self._value.tostring() # this requires time

a = mutable_str("123")
a[1] = "x"
print a

Probably array.array can be subclassed too...

bye,
bearophile



From salvatore.difazio at gmail.com  Tue Jan 16 08:59:53 2007
From: salvatore.difazio at gmail.com (Salvatore Di Fazio)
Date: 16 Jan 2007 05:59:53 -0800
Subject: Watch log
In-Reply-To: <1168924866.691081.251880@q2g2000cwa.googlegroups.com>
References: <1168892415.324184.273210@l53g2000cwa.googlegroups.com>
	<1168924866.691081.251880@q2g2000cwa.googlegroups.com>
Message-ID: <1168955992.751736.4170@38g2000cwa.googlegroups.com>

Michele Simionato ha scritto:

> You may begin from this:

Tnx Michele



From hg at nospam.org  Wed Jan 24 11:38:59 2007
From: hg at nospam.org (hg)
Date: Wed, 24 Jan 2007 17:38:59 +0100
Subject: Python does not play well with others
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<xqxirex3psq.fsf@cola3.ca.boeing.com>
	<mailman.3110.1169668391.32031.python-list@python.org>
Message-ID: <86Sth.49189$sE7.21480@newsfe21.lga>

egbert wrote:

> On Wed, Jan 24, 2007 at 06:24:37AM +0000, Harry George wrote:
>> 
>> Perl - excellent modules and bindings for just about everything ...
>> Java - a world of its own.  They reinvent the wheel instead of ...
>> PHP - are we talking web scripts or serious programs?  Are you ...
>> C - the portable assembler.  Solid, trusted, tunable ...
>> C++ - objects tacked onto C; but that didn't work so invent ...
>> Python - it just works.  Same scripts run on every platform ...
> 
> What about C# ?
> e
> --
> Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
> ========================================================================


arf arf



From irmen.NOSPAM at xs4all.nl  Sun Jan 28 21:27:28 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 29 Jan 2007 03:27:28 +0100
Subject: socket.inet_ntop, and pton question
In-Reply-To: <mailman.3255.1170036487.32031.python-list@python.org>
References: <12rpns1tkp0e34@corp.supernews.com>	<45bce8f7$0$334$e4fe514c@news.xs4all.nl>
	<mailman.3255.1170036487.32031.python-list@python.org>
Message-ID: <45bd5bb4$0$325$e4fe514c@news.xs4all.nl>

Gabriel Genellina wrote:


> But these are not the requested functions, inet_ntop() and inet_pton():
> 
> py> socket.inet_ntop
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'module' object has no attribute 'inet_ntop'
> 
> 

Oops, my bad. Should have had more coffee before replying I guess.

--Irmen


From bearophileHUGS at lycos.com  Thu Jan 18 17:27:15 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 18 Jan 2007 14:27:15 -0800
Subject: A note on heapq module
In-Reply-To: <8NSdnf38_otYcjLYnZ2dnUVZ_tadnZ2d@comcast.com>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<slrneqs4vp.b4s.apardon@rcpc42.vub.ac.be>
	<4Yidnf9NFKFm7jPYnZ2dnUVZ_u3inZ2d@comcast.com>
	<1169117876.063858.56570@s34g2000cwa.googlegroups.com>
	<8NSdnf38_otYcjLYnZ2dnUVZ_tadnZ2d@comcast.com>
Message-ID: <1169159235.864192.263210@v45g2000cwv.googlegroups.com>

Steven Bethard wrote:
> The current code fails when using unbound methods however::

I don't like your solution, this class was already slow enough. Don't
use unbound methods with this class :-)
Maybe there's a (better) solution to your problem: to make Heap a
function (or classmethod) that return sone of two possibile objects
created by one of two different classes that have different methods...

Beside that, I think __eq__ method needs more tests, because comparing
a Heap with key against another Heap without key may give some
problems...

I'll think about such problems/things.

Bye,
bearophile



From peterbe at gmail.com  Fri Jan  5 11:10:25 2007
From: peterbe at gmail.com (peterbe at gmail.com)
Date: 5 Jan 2007 08:10:25 -0800
Subject: elementtree.SimpleXMLWriter and xmlcharrefreplace
In-Reply-To: <1168012797.140846.159160@q40g2000cwq.googlegroups.com>
References: <1168012797.140846.159160@q40g2000cwq.googlegroups.com>
Message-ID: <1168013425.344157.36970@42g2000cwt.googlegroups.com>

My current version of SimpeXMLWriter is:
$Id: SimpleXMLWriter.py 1862 2004-06-18 07:31:02Z Fredrik $
I'm testing this on in python2.3.5 and python2.4.3.

peterbe at gmail.com wrote:
> I'll try to explain my problem with code.
> The problem is the output
>
> msg = u"S?dert?lje & Bor?s" # latin1 unicode string with a &
>
> from elementtree.SimpleXMLWriter import XMLWriter
> from cStringIO import StringIO
> out = StringIO()
> w = XMLWriter(out)
> body = w.start("body")
> w.element("text", msg)
> w.close(body)
> return out.getvalue()
>
> Here's the output I get:
> <body><text>S&#246;dert&#228;lje &#38;amp; Bor&#229;s</text></body>
> Here's what I would want and expect:
> <body><text>S&#246;dert&#228;lje &amp; Bor&#229;s</text></body>
>
> Notice that & is converted to &#38;amp; when it should be &amp; or &38;
> only.



From http  Thu Jan 11 01:31:39 2007
From: http (Paul Rubin)
Date: 10 Jan 2007 22:31:39 -0800
Subject: Is there a way to protect a piece of critical code?
References: <mailman.2524.1168424917.32031.python-list@python.org>
	<eo2pgf$j57$1@news.albasani.net>
	<mailman.2558.1168494787.32031.python-list@python.org>
	<7xzm8q6pw7.fsf@ruckus.brouhaha.com>
Message-ID: <7xsleiysz8.fsf@ruckus.brouhaha.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>     def get_from_queue(queue):
>        try:
>           return queue.get(block=False)
>        except Queue.Empty:
>           return QUEUE_IS_EMPTY

Alternatively:

     def get_from_queue(queue):
        try:
           return (queue.get(block=False), True)
        except Queue.Empty:
           return (None, False)

This is maybe a nicer interface (no special sentinel value needed).
You'd use

     value, nonempty = get_from_queue(queue)
      
if nonempty is true then the item is valid.


From tmosher at epix.net  Sun Jan  7 21:50:59 2007
From: tmosher at epix.net (tim mosher)
Date: Sun, 7 Jan 2007 21:50:59 -0500
Subject: Finding the name of a class
Message-ID: <000001c732cf$d6779a10$01fea8c0@mosherfamily>

Hello I'm looking for a Larry Bates that was in the Navy.  Could this be
you??   In CT in 1965???  In your 60's??
Please let me know I have been searching for over 10 yrs  thanks
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070107/e3691555/attachment.html>

From gagsl-py at yahoo.com.ar  Mon Jan  8 19:09:09 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 08 Jan 2007 21:09:09 -0300
Subject: Fwd: Execute binary code
In-Reply-To: <1168290090.137259.324360@i15g2000cwa.googlegroups.com>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<EOSdneXxmrS6OT_YnZ2dnUVZ_q7inZ2d@comcast.com>
	<1168289145.319706.199950@11g2000cwr.googlegroups.com>
	<4866bea60701081251we2bf7f3vb55a285ee20e91f6@mail.gmail.com>
	<mailman.2447.1168289572.32031.python-list@python.org>
	<1168290090.137259.324360@i15g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070108194009.03993008@yahoo.com.ar>

At Monday 8/1/2007 18:01, citronelu at yahoo.com wrote:

>Chris Mellon wrote:
> > Writing to a temp file will be at least 3 times as easy and twice as
> > reliable as any other method you come up with.
>
>I'm not disputing that, but I want to keep a piece of code (a parser
>for Oracle binary dumps, that I didn't wrote) out of foreign hands, as
>much as possible. Using a TEMP directory is not "stealth" enough.

This is what I would do  (untested of course!) (Mostly using the 
Win32 API so you'll have to use pywin32 or ctypes).

Call CreateFile with dwShareMode=0, FILE_ATTRIBUTE_TEMPORARY, 
FILE_FLAG_NO_BUFFERING, FILE_FLAG_DELETE_ON_CLOSE.
That means that no other process could open the file, if it fits in 
available memory probably it won't even be written to disk, and it 
will be deleted as soon as it has no more open handles. File name 
does not have to end in .exe.
Copy the desired contents into a buffer obtained from VirtualAlloc; 
then call WriteFile; release the buffer (rounding size up to next 4KB multiple)
Then CreateProcess with CREATE_SUSPENDED, and CloseHandle on the 
file, and CloseHandle on the two handles returned on 
PROCESS_INFORMATION. At this stage, the only open handle to the 
temporary file is held by the section object inside the process.
Then ResumeThread(hTread) -process begins running- and 
WaitForSingleObject(hProcess) -wait until finishes-.
As soon as it finishes execution, the last handle to the file is 
closed and it is deleted.

Another approach would be to go below the Windows API and use the 
native API function NtCreateProcess -officially undocumented- which 
receives a section handle (which does not have to be disk based). But 
this interfase is undocumented and known to change between Windows versions...

Or search for a rootkit...


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From beliavsky at aol.com  Sun Jan 21 19:00:30 2007
From: beliavsky at aol.com (Beliavsky)
Date: 21 Jan 2007 16:00:30 -0800
Subject: Reading Fortran Data
In-Reply-To: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
References: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
Message-ID: <1169424030.101768.124000@m58g2000cwm.googlegroups.com>

Tyler wrote:
> Hello All:
>
> After trying to find an open source alternative to Matlab (or IDL), I
> am currently getting acquainted with Python and, in particular SciPy,
> NumPy, and Matplotlib. While I await the delivery of Travis Oliphant's
> NumPy manual, I have a quick question (hopefully) regarding how to read
> in Fortran written data.
>
> The data files are not binary, but ASCII text files with no formatting
> and mixed data types (strings, integers, floats). For example, I have
> the following write statements in my Fortran code:

In plain Python, you can read each line in to a string, break the
string into "words" using split, and then convert the words into
variables of the desired types. If you are new to Python, this is an
important idiom to learn. I don't know if NumPy has  facilities to do
this more easily.

> I write the files as such:
>   WRITE(90,'(A30)') fgeo_name
>   WRITE(90,'(A30)') fmed_name

Let me comment on the Fortran code. For the following lines using
list-directed output, the compiler has considerable freedom in how it
writes the output. I guess you expect the integers nfault and npoint to
be written on one line and the vectors xpt and ypt to each be written
on separate lines. The compiler could print each number on a separate
line and be standard-conforming. This does not matter if you are going
to use a Fortran list-directed read to read the file, but it will
matter if you are using other languages. I suggest that you use format
strings to get more control over the ouptput format before you think
about reading the output files in Python. Otherwise you will be trying
to hit a moving target.

<snip>



From nagle at animats.com  Tue Jan 30 14:59:41 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 30 Jan 2007 19:59:41 GMT
Subject: Sourcing Python Developers
In-Reply-To: <45be52f5$1@news.arcor-ip.de>
References: <45BE4348.9020500@gmail.com> <45be52f5$1@news.arcor-ip.de>
Message-ID: <NsNvh.1383$zH1.640@newssvr29.news.prodigy.net>

Ralf Sch?nian wrote:
> Kartic schrieb:
> 
>> Hello,
>>
>> My company has quite a few opening involving python expertise. We are 
>> always looking for python resources (and find it difficult filling 
>> these positions, might I add). Is there any place to find developers' 
>> resumes (like finding jobs from http://python.org/community/jobs/)? If 
>> any one knows of a resume repository (other than Monster, Dice, 
>> Costs-an-arm-and-leg job site) please share.
> 
> 
> Do not know if you have to give your arm or your leg away, but maybe the 
> following place is of interest for you:
> 
> http://www.opensourcexperts.com
> 
> Ralf Schoenian

   I'd recommend against Rent-A-Coder.  I put a job out there
(overhauling "rwhois.py"), and three "coders" in succession
tried it and gave up.

				John Nagle


From basti.wiesner at gmx.net  Wed Jan  3 11:36:07 2007
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Wed, 03 Jan 2007 17:36:07 +0100
Subject: How do I add users using Python scripts on a Linux machine
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
	<ene0j1$6nk$03$1@news.t-online.com>
	<mailman.2210.1167755536.32031.python-list@python.org>
	<ene7el$l51$03$1@news.t-online.com> <engjvv$okr$1@news1.carnet.hr>
Message-ID: <engm1n$ann$00$1@news.t-online.com>

[ Ivan Voras <ivoras at fer.hr> ]

> Sebastian 'lunar' Wiesner wrote:
>> Carsten Haese <carsten at uniqsys.com> typed
> 
>>> I don't think that that has anything to do with Linux or not. The
>>> script is not the actual executable, hence its suid bit is
>>> irrelevant.
>> 
>> I don't think so. From what I know, the script is passed as
>> executable to the kernel loader, which interprets the shebang and
>> feeds the script through the correct interpreter. So the kernel
>> loader sees the script itself as executable instead of the
>> interpreter binary. I've heard of other Unix systems, which handle
>> this differently (meaning that the SUID bit on scripts has an
>> effect), but I may be wrong.
> 
> Yes, the kernel parses #! but the suid-ness is still controlled by the
> target interpreter (i.e. python executable). At least BSD systems also
> behave this way.

I don't think, that the interpreter controls SUID-ness. Privileges are
always handled by the kernel. At least the kernel needs to agree, when
a normal user wants to execute a SUID scripts.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From fccoelho at gmail.com  Thu Jan 25 04:23:18 2007
From: fccoelho at gmail.com (Flavio)
Date: 25 Jan 2007 01:23:18 -0800
Subject: raise UnicodeError, "label too long"
In-Reply-To: <egYth.15029$w91.10829@newsread1.news.pas.earthlink.net>
References: <1169672223.231030.262610@l53g2000cwa.googlegroups.com>
	<pan.2007.01.24.21.23.25.331322@gmx.net>
	<1169675004.099912.79520@v33g2000cwv.googlegroups.com>
	<45B7D4F7.9020308@v.loewis.de>
	<1169684719.607504.307310@l53g2000cwa.googlegroups.com>
	<egYth.15029$w91.10829@newsread1.news.pas.earthlink.net>
Message-ID: <1169716998.773756.43930@v33g2000cwv.googlegroups.com>

Guys, I am sorry  I wrote these messages very late at night.

Naturally what came before the dot is the language defining two letter
string that is usual of wikipedia urls.

Something in my code is obviously gobbling that up. Thanks for pointing
that out and my apologies again for not seeing this obvious bug.



On Jan 25, 4:39 am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On 24 Jan 2007 16:25:19 -0800, "Flavio" <fccoe... at gmail.com> declaimed
> the following in comp.lang.python:
>
>
>
> > something like this, for instance:
> >http://.wikipedia.org/wiki/Copper%28II%29_hydroxide        Was there some text between the // and .wikipedia? As written this,
> and the next one, both lock up Firefox. Take out the . and they work (or
> put www before the . ).
>
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com             wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/



From gagsl-py at yahoo.com.ar  Thu Jan 25 01:28:32 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 25 Jan 2007 03:28:32 -0300
Subject: ftplib and retrbinary or retrlines (losing newline
	characters in my log files)
In-Reply-To: <7d1760310701242205u6e6b4706ja20e3c07406a8064@mail.gmail.co
 m>
References: <7d1760310701242205u6e6b4706ja20e3c07406a8064@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070125031353.0452a4f8@yahoo.com.ar>

At Thursday 25/1/2007 03:05, aus stuff wrote:

>Hi am successfully downloading my text files and writing them to 
>local files  with either
>
><ftp://ftp.retrlines('RETR>ftp.retrlines('RETR ' + fl, fileObj.write)"
>
><ftp://ftp.retrbinary('retr/>ftp.retrbinary('RETR ' + fl, fileObj.write)
>
>However all my recieved (log) files have lost thier newline characters?

Both methods are different. From the docs for retrlines: "Retrieve a 
file or directory listing in ASCII transfer mode (...) The callback 
function is called for each line, with the trailing CRLF stripped.". 
The callback should be responsible of writting the missing '\n' then 
(fileObj should have been opened in text mode):

<ftp://ftp.retrlines('RETR>ftp.retrlines('RETR ' + fl, lambda line: 
fileObj.write('%s\n' % line))

Using retrbinary() you get the file in pieces, thay you should write 
in binary mode (just as the original code). The resulting file should 
be identical to the original file on the server. Line endings may be 
different on both platforms (some editors may allow to convert 
between \n, \r\n, \r...). That's why for a log file the ASCII 
transfer mode is better.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From gandalf at designaproduct.biz  Fri Jan  5 11:33:09 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Fri, 05 Jan 2007 17:33:09 +0100
Subject: find a .py path
In-Reply-To: <0Nunh.45640$gl2.30462@newsfe16.lga>
References: <nKunh.45586$gl2.35454@newsfe16.lga>
	<0Nunh.45640$gl2.30462@newsfe16.lga>
Message-ID: <459E7DC5.20800@designaproduct.biz>

hg ?rta:
> hg wrote:
>
>   
>> Hi,
>>
>> Is there an easy way for a script being executed (from anywhere) to know
>> where is is ... something in os.path ?
>>
>> Thanks,
>>
>> hg
>>     
>
> oops: os.path.abspath(sys.argv[0]) 
>   
Be aware with this. It is different when you do

/usr/bin/python prog.py

and

./prog.py

In the first case, sys.argv[0] will be /usr/bin/python!

You should better use 

os.path.abspath(__file__)

(that will work for normal python programs, but not for py2exe compiled 
programs or for modules imported from a zip file...)

Best,

   Laszlo



From hg at nospam.org  Sat Jan 27 09:59:02 2007
From: hg at nospam.org (hg)
Date: Sat, 27 Jan 2007 15:59:02 +0100
Subject: looking for ppp dialing tutorial / resources
Message-ID: <lWPuh.129787$cv2.66591@newsfe13.lga>

Hi,

I need to implement ppp client connection in my program ... found chestnut
dialer so far ...

any other resource in mind ?

Thanks

hg



From larry.bates at websafe.com  Thu Jan 11 13:13:09 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 11 Jan 2007 12:13:09 -0600
Subject: Python - C# interoperability
In-Reply-To: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>
References: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>
Message-ID: <45A67E35.4050107@websafe.com>

mc wrote:
> Is there an easy way to compile a Python class (or set of classes) into
> a .DLL that a C# program can call?  Or otherwise to use an existing
> library of Python classes from a C# program as seamlessly as possible?
> 

You can write COM objects that can be called from C# (or basically ANY
other language that can call COM objects) quite easily and compile them
with py2exe for distribution without python itself.

-Larry Bates


From mail at microcorp.co.za  Fri Jan 12 00:00:34 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 12 Jan 2007 07:00:34 +0200
Subject: Is there a way to protect a piece of critical code?
References: <mailman.2524.1168424917.32031.python-list@python.org><eo2pgf$j57$1@news.albasani.net><mailman.2558.1168494787.32031.python-list@python.org>
	<7xzm8q6pw7.fsf@ruckus.brouhaha.com>
Message-ID: <003601c73606$98340c40$03000080@hendrik>

"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote:


> "Hendrik van Rooyen" <mail at microcorp.co.za> writes:
> > am aware of Queue module - the same app uses it for something else.
> > I dont like too many try -- excepts in the code - I find they confuse
> > me when I try to read it later - and in this case I cannot block on waiting
for
> > the queue to fill.
>
> Do you have multiple threads reading from the same queue?  If not then
> you can use queue.empty() to see whether the queue is empty.  If yes,
> queue.empty isn't reliable (it can return nonempty, and then another
> thread empties out the queue before you get a chance to read it).  But
> you could always wrap the queue:
>
>     QUEUE_IS_EMPTY = object()   # global sentinel
>
>     def get_from_queue(queue):
>        try:
>           return queue.get(block=False)
>        except Queue.Empty:
>           return QUEUE_IS_EMPTY
>
> Maybe it's worth adding a method like that to the Queue module in the stdlib.
>
 There is only one reader.
I like this its clever, thanks

- Hendrik



From anthony at pob.org.uk  Sun Jan 21 17:20:03 2007
From: anthony at pob.org.uk (Ant)
Date: 21 Jan 2007 14:20:03 -0800
Subject: Python Windows Editors
In-Reply-To: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
Message-ID: <1169418003.870318.270800@51g2000cwl.googlegroups.com>

The pywin32 extension does not contain the python runtime itself, but
comes with many (very useful) classes you can use when interacting with
the windows universe. The editor is based on a component called
scintilla (http://www.scintilla.org/). The referenced site also offers
an editor SciTE based around the component, which comes with some nice
features and syntax files for a number of languages.

If you are going to make use of python on the windows platform, I would
highly recommend the pywin32 extension.

Regards,

Ant

W. Watson wrote:
> I downloaded python-2.5.msi and installed it. I believe its editor is IDE. I
> understand there's a Win editor called pythonwin. I believe it's in the
> download pywin32-210.win32-py2.5.exe, but I'm not sure if this exe file has
> just the editor or all of Python. Comments? If not how do I get the
> PythonWin editor by itself?
>
> BTW, one of the features I did not like of IDE is the limited file Print
> command. It puts everything in 16pt type, and gives no choice over what
> pages should be printed. Maybe there's an option?
>
>           Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
>               (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
>                Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet
>
>                 Two laws Newton and Einstein didn't discover:
>                   1. Time is money.
>                   2. Matter will be damaged in direct proportion
>                      to its value.
> -- 
>                      Web Page: <home.earthlink.net/~mtnviews>



From yacinechaouche at gmail.com  Mon Jan 29 10:31:33 2007
From: yacinechaouche at gmail.com (ychaouche)
Date: 29 Jan 2007 07:31:33 -0800
Subject: HTMLParser's start_tag method never called ?
Message-ID: <1170084691.837503.10520@j27g2000cwj.googlegroups.com>

Hi, python experts.

<console trace>
chaouche at CAY:~/TEST$ python nettoyageHTML.py
chaouche at CAY:~/TEST$
</console trace>

This is the nettoyageHTML.py python script

<code>
from HTMLParser import HTMLParser

class ParseurHTML(HTMLParser):
    def __init__(self):
        HTMLParser.__init__(self)

    def start_body(self,attrs):
        print "this is my body"

p = ParseurHTML()
p.feed(open("/home/chaouche/TEST/AJAX/testXMLRPC.html","r").read())
</code>

this is the testXMLRPC.html html file :

<html>
<head>
<script type="text/javascript" language="javascript" 
src="ClientXMLRPC.js">
</script>

<script type="text/javascript" language="javascript" >

    if (typeof netscape != 'undefined' && typeof netscape.security != 
'undefined') {
	
netscape.security.PrivilegeManager.enablePrivilege('UniversalBrowserRea
d');
    }

var chiffre = 0;
handler = function (self){
    if (self.xmlhttp.readyState == 4) {
        reponse = self.xmlhttp.responseText;
	//dump(reponse); permet d'acceder au dom si ce qu'on a recu est une 
forme de xml.
	document.getElementById("txt").innerHTML=reponse;
    }
}

function recupDonnees(){
    chiffre+=1;
    client = new ClientXMLRPC();
    client.setUrl("http://10.75.49.100:8081/bonjour/sayHi?
chiffre="+chiffre);
    client.executer();
    client.handlerEvenement = handler;
}
recupDonnees();

</script>
</head>
<body>

<span id="txt">NON</span>
</body>
</html>


The script should output "this is my body", but nothing is printed. 
Anyone ?

Y.Chaouche



From robert.kern at gmail.com  Wed Jan 24 19:42:04 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 24 Jan 2007 18:42:04 -0600
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <49E1CCC0-D22F-4411-B192-429E42045578@datafly.net>
References: <ep60jp$63v$1@aioe.org>
	<45b72b0d$0$5107$ba4acef3@news.orange.fr>	<e75321bd0701241533ie528b15p42a0a75bd0666c2d@mail.gmail.com>
	<49E1CCC0-D22F-4411-B192-429E42045578@datafly.net>
Message-ID: <ep8ucs$g4a$1@sea.gmane.org>

Sean Schertell wrote:
> Not to totally hijack the thread -- but since you're all talking  
> about best GUI frameworks. Any thoughts on the best looking framework  
> for OS X only? Is there any way to write little Python apps that will  
> launch in OS X using OS X widgets?

Use PyObjC. You have full access to the Cocoa framework.

  http://pyobjc.sourceforge.net/

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From heikki at osafoundation.org  Fri Jan 19 20:59:36 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 19 Jan 2007 17:59:36 -0800
Subject: More M2Crypto issues
In-Reply-To: <C7esh.21509$yC5.9079@newssvr27.news.prodigy.net>
References: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>
	<mailman.2887.1169173756.32031.python-list@python.org>
	<6u7sh.264$4H1.150@newssvr17.news.prodigy.net>
	<L_6dnVPmutZyhyzYnZ2dnUVZ_tSdnZ2d@comcast.com>
	<C7esh.21509$yC5.9079@newssvr27.news.prodigy.net>
Message-ID: <YcKdnYrJ6MgX6izYnZ2dnUVZ_oydnZ2d@comcast.com>

John Nagle wrote:
>     OpenSSL version: "OpenSSL 0.9.7a Feb 19 2003"

Hmm, I've never actually used that old OpenSSL myself, just assumed from
the original author's notes that anything from 0.9.7 onward worked.
Guess not. I am thinking of changing the requirements to state which one
works... I think the oldest that I have personally tested may have been
0.9.7d.

-- 
  Heikki Toivonen


From bigblueswope at gmail.com  Wed Jan 24 11:33:34 2007
From: bigblueswope at gmail.com (BJ Swope)
Date: Wed, 24 Jan 2007 11:33:34 -0500
Subject: smtplib starttls gmail example - comments?
In-Reply-To: <9afea2ac0701240724v6416c530v2e97d7c7ccd701f3@mail.gmail.com>
References: <W63698683.410.134.1@mxextra>
	<9afea2ac0701240256kae247b3s666be6529362c84e@mail.gmail.com>
	<G63739065.350.594.3@mxextra>
	<9afea2ac0701240724v6416c530v2e97d7c7ccd701f3@mail.gmail.com>
Message-ID: <fca207170701240833l6096b5f9mebead2cfa323edb9@mail.gmail.com>

Sweet!
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070124/cdc0e59a/attachment.html>

From edquichan at yahoo.com  Thu Jan 18 14:02:26 2007
From: edquichan at yahoo.com (EdG)
Date: 18 Jan 2007 11:02:26 -0800
Subject: Traversing the properties of a Class
In-Reply-To: <mailman.2880.1169146567.32031.python-list@python.org>
References: <1169141253.332211.12790@38g2000cwa.googlegroups.com>
	<mailman.2880.1169146567.32031.python-list@python.org>
Message-ID: <1169146946.319702.145110@v45g2000cwv.googlegroups.com>

Thanks.

Daniel Nogradi wrote:
> > I'm using Python version 2.4 and I created a class with some properties
> > like:
> >
> > def GetCallAmount(self):
> >         return somedata
> >
> > def GetCallCurrency(self):
> >     return  somemoredata
> >
> > more....defs..etc.
> >
> > CallAmount           = property(GetCallAmount,None,None,None)
> > CallCurrency         = property(GetCallCurrency, None, None, None)
> >
> > more....properies..etc.
> >
> > For debugging purposes, I would like to traverse the class listing out
> > all the properties.
>
>
> for attr in dir( yourclass ):
>     if repr( yourclass.__dict__[ attr ] ).startswith( '<property' ):
>         print 'This looks like a property although can be something
> else too: ' + attr
> 
> :)



From phd at phd.pp.ru  Tue Jan 30 14:58:00 2007
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Tue, 30 Jan 2007 22:58:00 +0300
Subject: SQLObject 0.7.3
Message-ID: <20070130195800.GB7446@phd.pp.ru>

Hello!

I'm pleased to announce the 0.7.3 release of SQLObject.

What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite, and
Firebird.  It also has newly added support for Sybase, MSSQL and MaxDB (also
known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.7.3

News and changes:
http://sqlobject.org/docs/News.html


What's New
==========

News since 0.7.2
----------------

Bug Fixes
~~~~~~~~~

* Allow multiple MSSQL connections.

* Psycopg1 requires port to be a string; psycopg2 requires port to be an int.

* Fixed a bug in MSSQLConnection caused by column names being unicode.

* Fixed a bug in FirebirdConnection caused by column names having trailing
  spaces.

* Fixed a missed import in firebirdconnection.py.

* Remove a leading slash in FirebirdConnection.

* Fixed a bug in deep Inheritance tree.

For a more complete list, please see the news:
http://sqlobject.org/docs/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From tim at tdw.net  Thu Jan 25 07:53:01 2007
From: tim at tdw.net (Tim Williams)
Date: Thu, 25 Jan 2007 12:53:01 +0000
Subject: While loop with "or"? Please help!
In-Reply-To: <B63827400.226.1844.1@mxextra>
References: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
	<45b8a31d$0$2401$426a74cc@news.free.fr>
	<epa8cl$vl0$02$1@news.t-online.com> <B63827400.226.1844.1@mxextra>
Message-ID: <9afea2ac0701250453s7d0d0887hf32aebabb754867d@mail.gmail.com>

On 25/01/07, Bruno Desthuilliers <bruno.desthuilliers at websiteburo.com> wrote:
> Peter Otten a ?crit :
> > Bruno Desthuilliers wrote:
> >
> >> and simplified again thanks to Python 'in' operator:
> >> while not usrinp.lower() in "yn":
> >
> > But note that 'in' performs a substring search and therefore "yn" and ""
> > would be accepted as valid answers, too.
>
> Mmm, right. Thanks for the correction.
>
> =>
>    while not usrinp.lower() in ['y', 'n']:

or better still

while usrinp.lower() not in ['y', 'n']:

:):)


-- 

Tim Williams


From s.mientki at id.umcn.nl  Thu Jan 11 09:55:02 2007
From: s.mientki at id.umcn.nl (stef)
Date: Thu, 11 Jan 2007 15:55:02 +0100
Subject: globals accros modules
In-Reply-To: <mailman.2556.1168492539.32031.python-list@python.org>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>
	<mailman.2556.1168492539.32031.python-list@python.org>
Message-ID: <3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>


>
> Change a=1 to amodule.a=1
> If you find yourself doing tricks with the module globals, think about 
> redesigning your application.
>
Of course I completely agree with you.

But ...
if you're moving from MatLab to Python,
and want to show your collegaes,
with how little effort they can reuse all their existing MatLab routines 
in Python,
then the global issue is a real pain !!

You can explain your collegaes, that
- the startindex of arrays changes from 1 to 0
- slices are upto, instead of including the final border
- indention is th? key
And tell them about all beautiful things in Python,
but tell them that they are going to loose all their globals ???

cheers,
Stef Mientki



From kleiner at hora-obscura.de  Thu Jan 18 05:19:36 2007
From: kleiner at hora-obscura.de (Stefan Palme)
Date: Thu, 18 Jan 2007 11:19:36 +0100
Subject: DOTALL not working as expected
References: <pan.2007.01.18.10.10.08.356617@hora-obscura.de>
Message-ID: <pan.2007.01.18.10.19.20.440079@hora-obscura.de>


Just noticed, that it works when *compiling* the pattern:

  import re
  p = re.compile('X.*?Y', re.DOTALL)
  print re.sub(p, 'Z', 'Xab\ncdY')

Still the question - my fault or a bug?

Best regards
-stefan-


On Thu, 18 Jan 2007 11:10:08 +0100, Stefan Palme wrote:
> 
> Hi all,
> 
> using the "re" module of Python (2.3 and 2.4), I tried the following:
> 
>   import re
>   print re.sub('X.*?Y', 'Z', 'Xab\ncdY', re.DOTALL)
> 
> I wanted to replace
>    Xab
>    cdY
> by a single "Z", but the "." in the pattern does not match the 
> included "\n".
> 
> When using the pattern "X(.|\n)*?Y" (explicity including "\n"
> in the set of "any character") I get the wanted result.
> 
> My fault or a bug in the module?
> 
> Thanks
> -stefan-



From horpner at yahoo.com  Thu Jan 11 10:33:51 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 11 Jan 2007 16:33:51 +0100
Subject: __init__ vs __new__
References: <7sicq25i3qbddgst5fdjhu5i7d1p8j5qg1@4ax.com>
Message-ID: <slrneqcmc1.b0.horpner@FIAD06.norwich.edu>

On 2007-01-11, Daniel Klein <danielkleinad at gmail.com> wrote:
> I've have a program that is using both of the methods below (in
> different classes of course) for initializing the class. The
> example below shows a class with the 2 methods with one
> commented out.
>
> class JsubroutineParameters(list):
>     "Represents a list of arguments for external subroutine calls."
>     # We only need to override methods which add objects to the list.
>
>     def __init__(self, alist = []):
>         for objekt in alist: _validateParameter(objekt)
>         self.extend(alist)
>
>     #def __new__(cls, alist = []):
>     #    for objekt in alist: _validateParameter(objekt)
>     #    return list.__new__(cls, alist)
>
> I don't really notice any behavioral difference. Is there in
> fact any difference in using one over the other? Performance?
> Side effects? ???
>
> I am using Python version 2.5.

The second version doesn't work the way you might be assuming.

Guido's paper says that mutable builtins like list have a dummy
__new__ static method. So 'return list.__new__(cls, alist)' does
nothing. It seems to work because the base class __init__
performs the initialization (assuming your __init__ above is
commented out). You can see this by providing a dummy __init__.

class Example(list):
  def __new__(cls, alist):
    return list.__new__(cls, alist)
  def __init__(self, alist):
    pass

>>> a = Example(range(5))
>>> a
[]

There is no need to use __new__ for mutable builtin types. Since
all you want from this construction is a side-effect, you can
nevertheless use it in this case.

Your __init__ should call the base-class __init__.

It's usually a bad idea to provide mutable types as default
arguments. Since you aren't modifying alist in __init__ you can
get away with it here, but getting in the habit of using the
below idiom might save you from a "gotcha" someday.

class JsubroutineParameters(list):
  def __init__(self, alist=None):
    if alist is None:
      alist = []
    for objekt in alist: _validateParameter(objekt)
    list.__init__(self, alist)

You will no longer need to call append.

-- 
Neil Cerutti


From nick at craig-wood.com  Sat Jan 27 08:30:06 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 27 Jan 2007 07:30:06 -0600
Subject: assertions to validate function parameters
References: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
	<pan.2007.01.26.04.26.09.242968@REMOVE.THIS.cybersource.com.au>
	<uCB*uiPBr@news.chiark.greenend.org.uk>
Message-ID: <slrnermkjp.bls.nick@irishsea.home.craig-wood.com>

Matthew Woodcraft <mattheww at chiark.greenend.org.uk> wrote:
>  I have a question for you. Consider this function:
> 
>  def f(n):
>      """Return the largest natural power of 2 which does not exceed n."""
>      if n < 1:
>          raise ValueError
>      i = 1
>      while i <= n:
>          j = i
>          i *= 2
>      return j
> 
>  If I pass it an instance of MyNumericClass, it will return an int or a
>  long, not an instance of MyNumericClass.
> 
>  In your view, is this a weakness of the implementation? Should the
>  author of the function make an effort to have it return a value of the
>  same type that it was passed?

Possibly... It is relatively easy to do anyway and reasonably cheap so
why not?  In this case a number about the same size as the original
number (possibly very large) will be returned so the argument that it
should return the same type is reasonably strong.

>>> def f(n):
...     """Return the largest natural power of 2 which does not exceed n."""
...     if n < 1:
...         raise ValueError
...     i = n - n + 1
...     while i <= n:
...         j = i
...         i *= 2
...     return j
... 
>>> f(1023)
512
>>> from decimal import Decimal
>>> f(Decimal("1023"))
Decimal("512")
>>> 

There are other ways of writing that

  i = n - n + 1

eg

  i = n.__class__(1)

It it basically saying "make me a numeric type with this value" so
maybe the __class__ is the clearest.  It assumes that the constructor
can co-erce an int into the type, wheras the first assumes that the
type can add an int.

Here is my function to calculate arctan() from any type.  The only
subtle bit for a general numeric type is detecting when we've
calculated enough, without using any specific knowledge about which
numeric type.

def arctan(x):
    """
    Calculate arctan(x)
    
    arctan(x) = x - x**3/3 + x**5/5 - ... (-1 < x < 1)
    """
    total = x
    power = x
    divisor = 1
    old_delta = None
    while 1:
        power *= x
        power *= x
        power = -power
        divisor += 2
        old_total = total
        total += power / divisor
        delta = abs(total - old_total)
        if old_delta is not None and delta >= old_delta:
            break
        old_delta = delta
    return total

>>> arctan(0.5)
0.46364760900080587
>>> arctan(Decimal("0.5"))
Decimal("0.4636476090008061162142562314")

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


From grahn+nntp at snipabacken.dyndns.org  Thu Jan 11 06:48:09 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 11 Jan 2007 11:48:09 GMT
Subject: Execute binary code
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<1168288176.054142.232780@s80g2000cwa.googlegroups.com>
	<slrneq6vga.tcj.grahn+nntp@frailea.sa.invalid>
	<1168355051.339026.211830@v33g2000cwv.googlegroups.com>
Message-ID: <slrneqc6lb.tcj.grahn+nntp@frailea.sa.invalid>

On 9 Jan 2007 07:04:11 -0800, sturlamolden <sturlamolden at yahoo.no> wrote:
>
> Jorgen Grahn wrote:
>
>> For what it's worth[1], under Unix it /is/ impossible. The only way to bring in
>> new code (short of dynamic libraries) is to call exec(2) or its variations,
>> and all need a file system object to load the code from.
>
> The x86 processor cannot tell the difference between code segments and
> data segments. If the executable code is stored in string, all you need
> is a pointer to the string holding the code. You can cast the string
> address to a function pointer (possibly through a void* if the compiler
> complains), then dereference (call) the function pointer.
>
> Trojans, viruses and JIT compilers do this all the time. Here is an
> (untested) example:
[...]

You probably need to flush the code cache somewhere there, too, don't you?
Or will that resolve itself because that memory area hasn't been executed
before?

I must admit I haven't contemplated this since the MC68000 was state of the
art, before caches became popular.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From sbassi at clubdelarazon.org  Thu Jan 25 13:58:18 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Thu, 25 Jan 2007 15:58:18 -0300
Subject: Module for SVG?
Message-ID: <9e2f512b0701251058k97ead4h89ccf1f4a40f269a@mail.gmail.com>

Hello,

I found http://www2.sfk.nl/svg as a Python module for writing SVG.
Last update was in 2004 and I am not sure if there is something
better.
Any recommendation for generating SVG graphics?
Best,
SB.


From smusnmrNOSPAM at yahoo.com  Tue Jan  9 11:04:18 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Tue, 9 Jan 2007 17:04:18 +0100
Subject: code formatter?
References: <entknh$8onl$1@zam602.zam.kfa-juelich.de>
	<mailman.2473.1168332187.32031.python-list@python.org>
Message-ID: <eo0ee4$cioh$1@zam602.zam.kfa-juelich.de>

>tabnanny?
not quite!

"Hendrik van Rooyen" <mail at microcorp.co.za> schrieb im Newsbeitrag 
news:mailman.2473.1168332187.32031.python-list at python.org...
> "siggi" <smusnmrNOSPAM at yahoo.com> wrote:
>
>> Is there a simple code formatter that first removes all indentations and
>> then refomats correctly?
>
> tabnanny ?
>
> - Hendrik
>
>
> 




From gokkog at yahoo.com  Mon Jan  1 08:53:44 2007
From: gokkog at yahoo.com (gokkog at yahoo.com)
Date: 1 Jan 2007 05:53:44 -0800
Subject: Help with small program
In-Reply-To: <45985255.1080105@redlinepy.com>
References: <1166966360.384179.101400@48g2000cwx.googlegroups.com>
	<emm291$78m$1@registered.motzarella.org>
	<1166979265.284345.173840@48g2000cwx.googlegroups.com>
	<4v94fuF1avmp3U1@mid.individual.net>
	<4v95b8F1b5csnU1@mid.individual.net>
	<1167270942.421817.280490@n51g2000cwc.googlegroups.com>
	<spsbp2p3kfueiekf7imrss7nrbsfckbjin@4ax.com>
	<45985255.1080105@redlinepy.com>
Message-ID: <1167659624.767818.74940@42g2000cwt.googlegroups.com>

"Paul Watson ???
"
> Tim Roberts wrote:
> > gokkog at yahoo.com wrote:
> >> Interesting impl in Python! I am wondering what if the requirement is
> >> to find the minimum number of coins which added to the "fin" sum...
> >
> > Given the set of coins in the original problem (100, 10, 5, 1, 0.5), the
> > solution it provides will always be optimal.  Even if we change this to
> > American coinage (50, 25, 10, 5, 1), I believe it is still optimal.
> >
> > It is certainly possible to construct a set of denominations for which the
> > algorithm occasionally chooses badly.  For example, if you give it the set
> > (40,35,10) and ask it to make change for 70, it will be suboptimal.
>
> Tim,
>
> Unless I am missing the point, the minimum number of coins from the set
> available will be chosen.  Surely this homework is past due by now.
>
> $ cat coins.py
> #!/usr/bin/env python
> import sys
>
> cointypes = (100, 10, 5, 1, 0.5)
>
> def coins(fin, cointypes):
>      needed = {}
>      for c in cointypes:
>          v, r = divmod(fin, c)
>          if v > 0:
>              needed[c] = int(v)
>              fin = r
>      return needed
>
> def doit(fin, cointypes = cointypes):
>      h = coins(fin, cointypes)
>      print '%.1f requires %d coins in hash ' % (fin, sum(h.values())), h
>
> if __name__ == '__main__':
>      doit(51)
>      doit(127)
>      doit(12.5)
>      doit(70, (40,35,10))
>
>      sys.exit(0)
>
> $ ./coins.py
> 51.0 requires 6 coins in hash  {1: 1, 10: 5}
> 127.0 requires 6 coins in hash  {1: 2, 10: 2, 100: 1, 5: 1}
> 12.5 requires 4 coins in hash  {0.5: 1, 1: 2, 10: 1}
> 70.0 requires 4 coins in hash  {40: 1, 10: 3}


To be explicit, the min coins question could be resolved with "dynamic
programming". So it is not a pure python question. No, this is not a
homework question. Well, it is somewhat academic:
http://www.topcoder.com/tc?module=Static&d1=tutorials&d2=dynProg

I wrote the following Python implementation akin to topcoder algorithm:

#!/usr/bin/env python
default_cointypes = (1, 3, 5)

def mincoins(fin, cointypes = default_cointypes):
    needed = {}
    for c in cointypes:
        needed[c] = 0
    min = {}
    for item in range(1, fin+1):
        min[item] = 2007 # suppose 2007 is the "infinity"
    min[0] = 0

    for i in range(1, fin+1):
        for c in cointypes:
            if (c <= i and min[i-c] + 1 < min[i]):
                min[i] = min[i-c] + 1
                needed[c] += 1

    print fin, "==>",  min[fin]
    print needed

if __name__ == '__main__':
    mincoins(11)

Probably there are things to be improved and there could be the
pythonic way(s): Welcome your comments and ideas!


Happy new year!
Wenjie



From pwatson at redlinepy.com  Thu Jan  4 13:30:36 2007
From: pwatson at redlinepy.com (Paul Watson)
Date: Thu, 04 Jan 2007 12:30:36 -0600
Subject: what is this?
In-Reply-To: <504v40F1ebv3sU1@mid.individual.net>
References: <mailman.2289.1167928928.32031.python-list@python.org>
	<504v40F1ebv3sU1@mid.individual.net>
Message-ID: <504veeF1dqqq4U1@mid.individual.net>

Paul Watson wrote:
> Eric Price wrote:
>> Hello;
>> I'm studying some code examples from the python cookbook site. I came 
>> across this:
>>
>> def colsplit(l, cols):
>>    rows = len(l) / cols
>>    if len(l) % cols:
>>        rows += 1
>>    m = []
>>    for i in range(rows):
>>        m.append(l[i::rows])
>>    return m
>>
>> What I'd like to know is what is the double colon? What does it do?
>>        m.append(l[i::rows])
>>
>> Thanks,
>> Eric
> 
> http://docs.python.org/tut/tut.html
> http://docs.python.org/tut/node5.html#SECTION005140000000000000000
> http://docs.python.org/ref/slicings.html
> 
> Probably most helpful to you is:
> 
> http://developer.mozilla.org/es4/proposals/slice_syntax.html

Sorry.  Probably most helpful to you is:

http://docs.python.org/lib/built-in-funcs.html

slice(  	[start,] stop[, step])
     Return a slice object representing the set of indices specified by 
range(start, stop, step). The start and step arguments default to None. 
Slice objects have read-only data attributes start, stop and step which 
merely return the argument values (or their default). They have no other 
explicit functionality; however they are used by Numerical Python and 
other third party extensions. Slice objects are also generated when 
extended indexing syntax is used. For example: "a[start:stop:step]" or 
"a[start:stop, i]".


From fd.calabrese at gmail.com  Mon Jan  8 09:07:20 2007
From: fd.calabrese at gmail.com (cesco)
Date: 8 Jan 2007 06:07:20 -0800
Subject: recursive function
Message-ID: <1168265240.294223.298750@s80g2000cwa.googlegroups.com>

Hi,

I have a dictionary of lists of tuples like in the following example:
dict = {1: [(3, 4), (5, 8)],
        2: [(5, 4), (21, 3), (19, 2)],
        3: [(16, 1), (0, 2), (1, 2), (3, 4)]]

In this case I have three lists inside the dict but this number is
known only at runtime. I have to write a function that considers all
the possible combinations of tuples belonging to the different lists
and return a list of tuples of tuples for which the sum of the first
element of the most inner tuple is equal to N.

For example, assuming N = 24, in this case it should return:
[((3, 4), (5, 4), (16, 1)), ((3, 4), (21, 3), (0, 2)), ((5, 8), (19,
2), (0, 2))]

A simple list comprehension would be enough if only I knew the number
of keys/lists beforehand but this is not the case. I guess I need a
recursive function. Can anyone help?

Thanks in advance
Francesco



From oliphant.travis at ieee.org  Fri Jan 12 01:07:32 2007
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Thu, 11 Jan 2007 23:07:32 -0700
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
In-Reply-To: <1168458486.538863.316130@k58g2000hse.googlegroups.com>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
Message-ID: <eo78ah$dqc$1@sea.gmane.org>

oyekomova wrote:
> Thanks for your help. I compared the following code in NumPy with the
> csvread in Matlab for a very large csv file. Matlab read the file in
> 577 seconds. On the other hand, this code below kept running for over 2
> hours. Can this program be made more efficient? FYI - The csv file was
> a simple 6 column file with a header row and more than a million
> records.
> 
> 
> import csv
> from numpy import array
> import time
> t1=time.clock()
> file_to_read = file('somename.csv','r')
> read_from = csv.reader(file_to_read)
> read_from.next()
> 
> datalist = [ map(float, row[:]) for row in read_from ]
> 
> # now the real data
> data = array(datalist, dtype = float)
> 
> elapsed=time.clock()-t1
> print elapsed
> 


If you use numpy.fromfile, you need to skip past the initial header row 
yourself.  Something like this:

fid = open('somename.csv')
data = numpy.fromfile(fid, sep=',').reshape(-1,6)
# for 6-column data.

-Travis



From andelys at riddergarn.dk  Sun Jan 28 13:04:25 2007
From: andelys at riddergarn.dk (Andreas Lysdal)
Date: Sun, 28 Jan 2007 19:04:25 +0100
Subject: Array delete
Message-ID: <45BCE5A9.2000300@riddergarn.dk>

Hey,

Can someone plz make a function for that takes a array, and then search
in it for duplicates, if it finds 2 or more items thats the same string
then delete all except 1.

Short: it deletes all duplicates in a array

thanks

-- 
   _________            .__        __                  ______________
  /   _____/ ___________|__|______/  |_  ___________  /  |  \______  \
  \_____  \_/ ___\_  __ \  \____ \   __\/ __ \_  __ \/   |  |_  /    /
  /        \  \___|  | \/  |  |_> >  | \  ___/|  | \/    ^   / /    /
/_______  /\___  >__|  |__|   __/|__|  \___  >__|  \____   | /____/
         \/     \/         |__|             \/           |__|



From gagsl-py at yahoo.com.ar  Mon Jan 15 03:06:25 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 15 Jan 2007 05:06:25 -0300
Subject: Class list of a module
In-Reply-To: <OF26C969EB.BAFF11A0-ONC1257264.002723D2-C1257264.0028BCA1@
	an.cit.alcatel.fr>
References: <OF26C969EB.BAFF11A0-ONC1257264.002723D2-C1257264.0028BCA1@an.cit.alcatel.fr>
Message-ID: <7.0.1.0.0.20070115045533.0388daa0@yahoo.com.ar>

At Monday 15/1/2007 04:27, you wrote:

>I want to get all classes of a module in a list. I wrote this code but I
>wonder
>if there's not a simpler solution
>
>
>import inspect
>
>def getClassList(aModule):
>     return [getattr(aModule, attName) \
>             for attName in aModule.__dict__  \
>             if inspect.isclass(getattr(aModule, attName))]

Looks rather simple to me... Anyway, you could avoid calling getattr 
twice, if you iterate over vars(aModule).itervalues()

def getClassList(aModule):
     return [cls for cls in vars(aModule).itervalues()
                     if inspect.isclass(cls)]

(And note that there is no need for using \ at the line ends, because 
of the [])


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From rasmussen.bryan at gmail.com  Wed Jan 31 04:40:11 2007
From: rasmussen.bryan at gmail.com (bryan rasmussen)
Date: Wed, 31 Jan 2007 10:40:11 +0100
Subject: BYU Physics Prof Finds Thermate in WTC Physical Samples,
	Building Collapses an Inside Job
In-Reply-To: <45bff548$0$97249$892e7fe2@authen.yellow.readfreenews.net>
References: <1170200864.492655.11850@s48g2000cws.googlegroups.com>
	<45bff548$0$97249$892e7fe2@authen.yellow.readfreenews.net>
Message-ID: <3bb44c6e0701310140w4406879dof5616c66c0b233ae@mail.gmail.com>

I think he meant that the body of Thermate was found among WTC
physical samples, the conclusion is that Thermate was responsible for
collapsing the WTC. The further conclusion is that Thermate is or was
in possession of time travel technology, he has obviously recently
gone back in time to attack the WTC and been killed. This would
explain why trolling duties have been recently taken up by
stj911 at rock.com on this list.

Cheers,
Bryan Rasmussen

On 1/31/07, soutjhyDin <nospam at nospam.com> wrote:
>
> <stj911 at rock.com> wrote in message
> news:1170200864.492655.11850 at s48g2000cws.googlegroups.com...
> > http://portland.indymedia.org/en/2006/06/341238.shtml
> >
> > BYU Physics Prof Finds Thermate in WTC Physical Samples, Building
> > Collapses an Inside Job
> > author: Jacob Hamblin
> > Based on chemical analysis of WTC structural steel residue, a Brigham
> > Young University physics professor has identified the material as
> > Thermate. Thermate is the controlled demolition explosive thermite
> > plus sulfur.
>
> WRONG!  you must make this stuff up as you go along.
>
> Thermate and thermite have nothing to do with "controlled demolition",
> moron.
>
> What is the prime ingredient of both?  Rust.
>
> The Iron Oxide(s), dummy.
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From bj_666 at gmx.net  Tue Jan  9 04:32:23 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 09 Jan 2007 10:32:23 +0100
Subject: How to write temporary data to file?
References: <mailman.2461.1168316179.32031.python-list@python.org>
Message-ID: <pan.2007.01.09.09.32.23.528342@gmx.net>

In <mailman.2461.1168316179.32031.python-list at python.org>, Thomas Ploch
wrote:

> d = {
> 	'url1': {
> 		'emails': ['a', 'b', 'c',...],
> 		'matches': ['d', 'e', 'f',...]
> 	},
> 	'url2': {...
> }
> 
> This dictionary will get _very_ big, so I want to write it somehow to a
> file after it has grown to a certain size.
> 
> How would I achieve that?

If you want easy access to single 'url' keys then `shelve` might be an
alternative to pickling the whole thing as one big object.

Ciao,
	Marc 'BlackJack' Rintsch


From mail at microcorp.co.za  Mon Jan 15 00:49:58 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 15 Jan 2007 07:49:58 +0200
Subject: Maths error
References: <eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136><eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org><eo7kdf$a80$1@gemini.csx.cam.ac.uk><mailman.2685.1168670120.32031.python-list@python.org><DN%ph.10462$w91.2298@newsread1.news.pas.earthlink.net><mailman.2708.1168752710.32031.python-list@python.org>
	<NsAqh.14387$X72.9220@newsread3.news.pas.earthlink.net>
Message-ID: <008c01c73868$fe309720$03000080@hendrik>

"Dennis Lee Bieber" <wlfraed at ix.netcom.com>wrote:


> On Sun, 14 Jan 2007 07:18:11 +0200, "Hendrik van Rooyen"
> <mail at microcorp.co.za> declaimed the following in comp.lang.python:
> 
> > 
> > I recall an SF character known as "Slipstick Libby",
> > who was supposed to be a Genius - but I forget
> > the setting and the author.
> >
> Robert Heinlein. Appears a few of the Lazarus Long books.
>  
> > It is something that has become quietly extinct, and
> > we did not even notice.
> >
> And get collector prices --
> http://www.sphere.bc.ca/test/sruniverse.html

Thanks Dennis - Fascinating site !

- Hendrik



From nyenyec at gmail.com  Mon Jan  8 23:17:46 2007
From: nyenyec at gmail.com (nyenyec)
Date: 8 Jan 2007 20:17:46 -0800
Subject: re.sub and re.MULTILINE
Message-ID: <1168316266.374186.271310@42g2000cwt.googlegroups.com>

I feel like a complete idiot but I can't figure out why re.sub won't
match multiline strings:

This works:
>>> re.search("^foo", "\nfoo", re.MULTILINE)
<_sre.SRE_Match object at 0x6c448>

This doesn't. No replacement:
>>> re.sub("^foo", "bar", "\nfoo", re.MULTILINE)
'\nfoo'

Why?

Thanks,
nyenyec



From jamesthiele.usenet at gmail.com  Wed Jan 10 10:35:22 2007
From: jamesthiele.usenet at gmail.com (jamesthiele.usenet at gmail.com)
Date: 10 Jan 2007 07:35:22 -0800
Subject: Seattle Python Interest Group Thursday at 7:00 PM
Message-ID: <mailman.2553.1168492314.32031.python-announce-list@python.org>

Seattle Python Interest Group Meeting Thursday, Jan 11th at 7:00 PM

Bar underneath the Third Place Books in Ravenna.
http://www.ravennathirdplace.com/
NE 65th St & 20th Ave NE



From mail at microcorp.co.za  Sat Jan 13 01:20:38 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 13 Jan 2007 08:20:38 +0200
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org><50fudtF1g1nplU1@mid.individual.net><envur1$rq1$1@gemini.csx.cam.ac.uk><mailman.2480.1168350033.32031.python-list@python.org><Xns98B384E126F4Ctim111one@216.196.97.136><eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136><eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org>
	<eo7kdf$a80$1@gemini.csx.cam.ac.uk>
Message-ID: <008101c736db$0d5bb480$03000080@hendrik>

 "Nick Maclaren" <nmm1 at cus.cam.ac.uk> wrote:
>
> In article <mailman.2632.1168583141.32031.python-list at python.org>,
> "Hendrik van Rooyen" <mail at microcorp.co.za> writes:
> |>
> |> I would have thought that this sort of thing was a natural consequence
> |> of rounding errors - if I round (or worse truncate) a binary, I can be off
> |> by at most one, with an expectation of a half of a least significant digit,
> |> while if I use hex digits, my expectation is around eight, and for decimal
> |> around five...
> |>
> |> So it would seem natural that errors would propagate
> |> faster on big base systems, AOTBE, but this may be
> |> a naive view..
>
> Yes, indeed, and that is precisely why the "we must use binary" camp won
> out.  The problem was that computers of the early 1970s were not quite
> powerful enough to run real applications with simulated floating-point
> arithmetic.  I am one of the half-dozen people who did ANY actual tests
> on real numerical code, but there may have been some work since!

*grin* - I was around at that time, and some of the inappropriate habits
almost forced by the lack of processing power still linger in my mind,
like - "Don't use division if you can possibly avoid it, - its EXPENSIVE!"
- it seems so silly nowadays.

>
> Nowadays, it would be easy, and it would make quite a good PhD.  The
> points to look at would be the base and the rounding rules (including
> IEEE rounding versus probabilistic versus last bit forced[*]).  We know
> that the use or not of denormalised numbers and the exact details of
> true rounding make essentially no difference.
>
> In a world ruled by reason rather than spin, this investigation
> would have been done before claiming that decimal floating-point is an
> adequate replacement for binary for numerical work, but we don't live
> in such a world.  No matter.  Almost everyone in the area agrees that
> decimal floating-point isn't MUCH worse than binary, from a numerical
> point of view :-)
>

As an old slide rule user - I can agree with this - if you know the order
of the answer, and maybe two points after the decimal, it will tell you
if the bridge will fall down or not. Having an additional fifty decimal
places of accuracy does not really add any real information in these
cases.  Its nice of course if its free, like it has almost become - but
I think people get mesmerized by the numbers, without giving any
thought to what they mean - which is probably why we often see
threads complaining about the "error" in the fifteenth decimal place..
>
> [*] Assuming signed magnitude, calculate the answer truncated towards
> zero but keep track of whether it is exact.  If not, force the last
> bit to 1.  An old, cheap approximation to rounding.
>
This is not so cheap - its good solid reasoning in my book -
after all, "something" is a lot more than "nothing" and should
not be thrown away...

- Hendrik



From dickinsm at gmail.com  Tue Jan 16 10:25:08 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: 16 Jan 2007 07:25:08 -0800
Subject: Conflicting needs for __init__ method
In-Reply-To: <mailman.2741.1168898073.32031.python-list@python.org>
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<mailman.2741.1168898073.32031.python-list@python.org>
Message-ID: <1168961105.446604.259840@l53g2000cwa.googlegroups.com>

On Jan 15, 4:54 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> dicki... at gmail.com writes:
> > Suppose you're writing a class "Rational" for rational numbers.  The
> > __init__ function of such a class has two quite different roles to
> > play.
> That should be your first clue to question whether you're actually
> needing separate functions, rather than trying to force one function
> to do many different things.

Agreed.  It was clear that I wanted two separate functions, but it
seemed that the system was effectively forcing me to use just one;
that is, I was working from the following two assumptions:

(1) *Every* time a Rational is created, __init__ must eventually be
called, and
(2) The user of the class expects to call Rational() to create
rationals.

(1) argues for __init__ being small, simple and efficient, while (2)
wants it to be large and user friendly (possibly dispatching to other
methods to do most of the real work).  But as has been pointed out,
thanks to the existence of __new__,  (1) is simply false.  Time to be
thankful for new-style classes.

> > But __init__ also plays another role: it's going to be used by the
> > other Rational arithmetic methods, like __add__ and __mul__, to
> > return new Rational instances.
> No, it won't; those methods won't "use" the __init__ method. They will
> use a constructor, and __init__ is not a constructor (though it does
> get *called by* the construction process).

Sorry---I'm well aware that __init__ isn't a constructor; I wasn't
being precise enough in my use of `used'.

Mark



From gagsl-py at yahoo.com.ar  Sun Jan  7 15:17:19 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 12:17:19 -0800
Subject: Capturing stderr and stdout of a subprocess as a single stream
In-Reply-To: <1168198435.629380.136080@42g2000cwt.googlegroups.com>
References: <1168198435.629380.136080@42g2000cwt.googlegroups.com>
Message-ID: <1168201039.867515.35300@38g2000cwa.googlegroups.com>



On 7 ene, 16:33, "Fuzzyman" <fuzzy... at gmail.com> wrote:
> Hello all,
>
> Before I ask the question a couple of notes :
>
> * This question is for implementing a script inside the Wing IDE. For
> some reason using the subprocess module doesn't work so I need a
> solution that doesn't use this module.
> * The platform is Windows and I'm happy with a Windoze only solution.
> :-)
>
> I would like to execute subprocesses asynchronously and capture stdout
> / stderr as a single stream.
>
> If I use "os.popen3(executable)" it gives me separate pipes for stdout
> and stderr, but reads from them are blocking.
>
> The output on stdout and stderr may be interleaved and I would like to
> display them *as* they arrive. That means I can't just read from them
> and output the results.
>
> The only solution I can think of is to read from both a character at a
> time on two separate threads, putting the data into a queue. A separate
> thread could pull characters off the queue and display them. (I don't
> need to differentiate between stdout and stderr when I display.)
>
> Can anyone think of a better solution ?
>
> My current code works, but *doesn't* capture stderr :
>
> from threading import Thread
>
> pipe = os.popen(executable)
>
> def DisplayOutput():
>     while True:
>         output = pipe.read(1)
>         if not output:
>             break
>         display(output)
>
> Thread(target=DisplayOutput).start()
>
> All the best,
>
> Fuzzymanhttp://www.voidspace.org.uk/python/articles.shtml

Try using popen4 instead. But since you already have a thread, it may
be better to use popen2 and two threads to read from stdout and stderr
to avoid a potential deadlock; they can put read lines into a Queue,
and DisplayOutput just get these lines in order. (See the warnings in
the popen2 module documentation).

-- 
Gabriel Genellina



From Art at Arthurian.com  Mon Jan 29 13:15:13 2007
From: Art at Arthurian.com (Frank Arthur)
Date: Mon, 29 Jan 2007 13:15:13 -0500
Subject: Excellent Interview with Dennis D'Souza, full of laughs
References: <1170083292.991070.79560@v33g2000cwv.googlegroups.com>
	<45be1d27$0$97248$892e7fe2@authen.yellow.readfreenews.net>
	<1170087497.071441.118560@s48g2000cws.googlegroups.com>
Message-ID: <6Mqvh.5640$fC2.95@bignews4.bellsouth.net>

Islamist bastard <thermate at india.com> wrote in message 
news:1170087497.071441.118560 at s48g2000cws.googlegroups.com...

<thermate at india.com> wrote in message 
news:1170087497.071441.118560 at s48g2000cws.googlegroups.com...
> FBI spook bastard  that speaks french also
>
> On Jan 29, 8:13 am, "Hampton Din" <nos... at nospam.com> wrote:
>>      stupid troll
>
> 




From gagsl-py at yahoo.com.ar  Thu Jan 11 00:15:31 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 02:15:31 -0300
Subject: globals accros modules
In-Reply-To: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>
Message-ID: <7.0.1.0.0.20070111021138.0584ed78@yahoo.com.ar>

At Thursday 11/1/2007 01:11, alf wrote:

>How can I have global globals without cyclical import?

You can't. Globals are module globals. You need to qualify *which* 
module `a` belongs to.

>--------------------
>amodule.py:
>def f():
>      global a
>      print a
>--------------------
>main.py:
>import amodule
>a=1
>amodule.f()

Change a=1 to amodule.a=1
If you find yourself doing tricks with the module globals, think 
about redesigning your application.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From DustanGroups at gmail.com  Sun Jan  7 16:52:42 2007
From: DustanGroups at gmail.com (Dustan)
Date: 7 Jan 2007 13:52:42 -0800
Subject: strange for loop construct
In-Reply-To: <12ptf5bl21f2teb@corp.supernews.com>
References: <1168029548.217679.251230@q40g2000cwq.googlegroups.com>
	<mailman.2347.1168030198.32031.python-list@python.org>
	<12ptf5bl21f2teb@corp.supernews.com>
Message-ID: <1168206762.164747.299470@42g2000cwt.googlegroups.com>


Mark Elston wrote:
> * Gabriel Genellina wrote (on 1/5/2007 12:49 PM):
> > At Friday 5/1/2007 17:39, Sardaukary at gmail.com wrote:
> >
> >> wordfreq = [wordlist.count(p) for p in wordlist]
> >>
> >> I would expect
> >>
> >> for p in wordlist:
> >>     wordfreq.append(wordlist.count(p))
> >>
> >>
> >> I didn't know you could have an expression in the same line.
> >
> > That's known as a "list comprehension" and is roughly equivalent to your
> > code. Section 5 of the tutorial covers them.
> > http://docs.python.org/tut/node7.html
> >
> >
>
> If you have a Python installation you should be able to find the
> "Whats New" section of the docs.  List comprehensions are described
> pretty well in the "What's new in Python 2.0?" section.  This gives
> some simple examples as well as the rationale behind them.

Shouldn't that same page be found on the python website?
http://www.python.org/doc/2.0/
Any clue as to why it isn't?

> Mark



From ask.me at mail.com  Sun Jan 28 12:57:55 2007
From: ask.me at mail.com (Jammer)
Date: Sun, 28 Jan 2007 12:57:55 -0500
Subject: string byte dump
Message-ID: <9609c$45bce423$d8a87c2a$8428@NEXICOM.NET>

Does anyone that knows python want to write me a byte dump for strings? :-)

I am trying to modify a plugin (that someone else wrote) that uses 
interprocess communication.
It works on strings without special characters but it fails on other 
stings like "Bj?rk".

It calls decode('utf8') but I guess the strings are not utf8 so I need 
to find out what is being input.


From smusnmrNOSPAM at yahoo.com  Fri Jan 26 03:32:19 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Fri, 26 Jan 2007 09:32:19 +0100
Subject: Thank you, Martin, Wang and Colin
References: <epad97$fhqb$1@zam602.zam.kfa-juelich.de>
Message-ID: <epceal$3p9r$1@zam602.zam.kfa-juelich.de>

Thanks for your answers, Martin, Wang and Colin!

siggi

"siggi" <smusnmrNOSPAM at yahoo.com> schrieb im Newsbeitrag 
news:epad97$fhqb$1 at zam602.zam.kfa-juelich.de...
> Hi all,
>
> installing a package with 'setup.py' is easy. But how do I uninstall the
> package, once I want to get rid of it again?
>
> Thanks,
>
> siggi
>
>
> 




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan  8 12:29:43 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 08 Jan 2007 18:29:43 +0100
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk> <entj5d$o4$1@south.jnrs.ja.net>
	<entkru$2vs$1@gemini.csx.cam.ac.uk>
	<50f5snF1fb5uqU2@mid.individual.net>
	<entpo0$d0g$1@gemini.csx.cam.ac.uk>
	<mailman.2425.1168272626.32031.python-list@python.org>
	<enttq6$lj2$1@gemini.csx.cam.ac.uk>
Message-ID: <50fdc7F1fki7dU2@mid.individual.net>

Nick Maclaren wrote:

> I think that you should.

Big words.

> Where does it say that tuple's __str__ is the same as its
> __repr__? 

Where does it say that a tuple's __str__ does not call its contents'
__repr__?

> The obvious interpretation of the documentation is that a sequence
> type's __str__ would call __str__ on each sub-object,

Where do you read that? BTW, that makes absolutely no sense to me.
Also, lists of Strings would quickly get messed up when displaying
them using __str__.

Regards,


Bj?rn

-- 
BOFH excuse #359:

YOU HAVE AN I/O ERROR -> Incompetent Operator error



From mensanator at aol.com  Mon Jan 29 15:56:02 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: 29 Jan 2007 12:56:02 -0800
Subject: List Behavior when inserting new items
In-Reply-To: <1170097845.805992.118870@h3g2000cwc.googlegroups.com>
References: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
	<526ut2F1n2q69U1@mid.uni-berlin.de>
	<1170097845.805992.118870@h3g2000cwc.googlegroups.com>
Message-ID: <1170104162.555403.164270@m58g2000cwm.googlegroups.com>



On Jan 29, 1:10 pm, "Drew" <olso... at gmail.com> wrote:
> > What is your actual usecase?
>
> > diezThe issue is that I don't know how long the list will eventually be.
> Essentially I'm trying to use a 2D list to hold lines that I will
> eventually print to the screen. Blank elements in the list will be
> printed as spaces. I suppose every time I add an element, I could find
> the difference between the size of the list and the desired index and
> fill in the range between with " " values, however I just wanted to
> see if there was a more natural way in the language.

I would use DBR's suggestion to use a dictionary and only store
actual values. In this example, I'm making a histogram that only
ends up having results for 4,7,8,9,10 but I want the graph to show
the zero occurrences as well, so I just create them on the fly
when printing.

print
print 'tc factor of 2 distribution (* scale = 8)'
print
tchistkeys = tchist.keys()
tchistkeys.sort()
prev_key = 0
for i in tchistkeys:
    while prev_key<i:
        print '%3d (%3d)' % (prev_key,0)
        prev_key += 1
    print '%3d (%3d)' % (i,tchist[i]),
    hgraph = divmod(tchist[i],8)
    s = '*'*(hgraph[0])
    if hgraph[1]>0:
        s = s + '.'
    print s
    prev_key += 1

##    tc factor of 2 distribution (* scale = 8)
##
##      0 (  0)
##      1 (  0)
##      2 (  0)
##      3 (  0)
##      4 (  1) .
##      5 (  0)
##      6 (  0)
##      7 (112) **************
##      8 (219) ***************************.
##      9 ( 58) *******.
##     10 (110) *************.




>
> Thanks,
> Drew



From pavlovevidence at gmail.com  Tue Jan 16 16:29:54 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 16 Jan 2007 13:29:54 -0800
Subject: assert versus print [was Re: The curious behavior of integer
	objects]
In-Reply-To: <slrneqpld3.1r4.horpner@FIAD06.norwich.edu>
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
	<mailman.2744.1168901460.32031.python-list@python.org>
	<pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>
	<76fd5acf0701151838l1a724be5n3f1e1fda629d1464@mail.gmail.com>
	<mailman.2762.1168916788.32031.python-list@python.org>
	<1168931486.610893.250040@38g2000cwa.googlegroups.com>
	<mailman.2772.1168951023.32031.python-list@python.org>
	<slrneqpld3.1r4.horpner@FIAD06.norwich.edu>
Message-ID: <1168982994.057441.182780@38g2000cwa.googlegroups.com>


Neil Cerutti wrote:
> On 2007-01-16, Ron Adam <rrr at ronadam.com> wrote:
> > I have to admit that part of why assert seems wrong to me is
> > the meaning of the word implies something you shouldn't be able
> > to ignore.  While warnings seem like something that can be
> > disregarded.
>
> Experienced C coders expect assert to behave like that.
>
> The only reason (I know of) to turn off error checking is to
> optimize. However, removing tests won't usually make a big enough
> speed difference to be worth the burthen of testing two different
> versions of the same source code.

I don't know about you, but I tend put very expensive checks in assert
statements (or inside an if __debug__).  Stuff like checking one-to-one
synchronicity between two large trees, checking whether lists are
sorted, etc.  If all you're doing is asserting that x==0, yeah, who
cares.  If you're asserting issorted(list), I think you might want to
shut that off in production code.


> So to me the assert statement is either dubious syntax-sugar or
> dangerous, depending on Python's command line arguments.

If used as intended (i.e., to claim that a correct program should
always meet the condition), it shouldn't be any more dangerous than
omitting the test altogether.

The danger comes from using it to check for things that aren't
indicative of a bug in the program; for instance, to verify input.
Then the program can crash and burn if optimization is turned on.


Carl Banks



From no-spam at no-spam-no-spam.invalid  Sat Jan  6 07:03:34 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sat, 06 Jan 2007 13:03:34 +0100
Subject: howto overload with a NOP (empty statement)
In-Reply-To: <adeb4$459f7a11$d443bb3a$14652@news.speedlinq.nl>
References: <adeb4$459f7a11$d443bb3a$14652@news.speedlinq.nl>
Message-ID: <eno36n$7q5$1@news.albasani.net>

Stef Mientki wrote:
> How should I overload / disable a method ?
> In the example below I have defined the class "Power_Supply", derived 
> from baseclass "device".
> The baseclass has a method "execute", which will be implemented in most 
> derived classes, but not in all.
> Now apparently it's not allowed to overload a method with an empty 
> statement.
> I could write a nonsense dummy statement, like "A= 3", but isn't there 
> another way ?
> 
> thanks, Stef Mientki
> 
> class device:
>   def execute (self):
>     print 'execute not yet implemented for', self.Name
> 
> 
> class Power_Supply (device):
>   def execute (self): ;




class device:
   def execute (self):
       raise NotImplementedError('virtual: should do this and that')



This NotImplementedError virtual method scheme will also be detected by pychecker in order to warn correctly: that classes of actual instances have to override all open virtuals.


Robert


From medicalsounds at hotmail.com  Wed Jan 24 23:26:00 2007
From: medicalsounds at hotmail.com (kevin)
Date: 24 Jan 2007 20:26:00 -0800
Subject: Using Timing function problem.....
Message-ID: <1169699160.119721.9750@v45g2000cwv.googlegroups.com>

Hi... I'm having a few problems here...
I want to input in my function different values and then time each one
to see how long it took to run the function... so right now it doesn't
like the "i" inside my function fibonacci(i)  but if I put a constant
it's fine....
any idea on how to approach this?
thanks!
Jonathan

The Code:
=======================================================

for i in (range(1,30)):
        mytime1 = timeit.Timer( 'fibonacci(i)', 'from prl1 import
fibonacci' )
        mytime2 = timeit.Timer( 'fibonacci(i)', 'from prl2 import
fibonacci' )

        fib1 = mytime1.timeit(1)
        fib2 = mytime2.timeit(1)

=======================================================

The Error:
=======================================================
Traceback (most recent call last):
  File "prl3.py", line 23, in ?
    fib1 = mytime1.timeit(1)
  File "/usr/lib64/python2.4/timeit.py", line 161, in timeit
    timing = self.inner(it, self.timer)
  File "<timeit-src>", line 6, in inner
NameError: global name 'i' is not defined
=======================================================



From zaz600 at gmail.com  Sun Jan 28 23:58:39 2007
From: zaz600 at gmail.com (NoName)
Date: 28 Jan 2007 20:58:39 -0800
Subject: Random passwords generation (Python vs Perl) =)
Message-ID: <1170046719.708692.243290@s48g2000cws.googlegroups.com>

Perl:
@char=("A".."Z","a".."z",0..9);
do{print join("", at char[map{rand @char}(1..8)])}while(<>);

!!generate passwords untill U press ctrl-z



Python (from CookBook):

from random import choice
import string
print ''.join([choice(string.letters+string.digits) for i in 
range(1,8)])

!!generate password once :(

who can write this smaller or without 'import'?



From sturlamolden at yahoo.no  Wed Jan 10 13:14:39 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 10 Jan 2007 10:14:39 -0800
Subject: Parallel Python
In-Reply-To: <eo38f1$6cu$1@gemini.csx.cam.ac.uk>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
Message-ID: <1168452879.866265.36880@i39g2000hsf.googlegroups.com>


Nick Maclaren wrote:

> as the ones that you have to play for threaded programs.  Yes, I know
> that it is a bit Irish for the best way to use a shared memory system
> to be to not share memory, but that's how it is.

Thank you for clearing that up.

In any case, this means that Python can happily keep its GIL, as the
CPU bound 'HPC' tasks for which the GIL does matter should be done
using multiple processes (not threads) anyway. That leaves threads as a
tool for programming certain i/o tasks and maintaining 'responsive'
user interfaces, for which the GIL incidentally does not matter.

I wonder if too much emphasis is put on thread programming these days.
Threads may be nice for programming web servers and the like, but not
for numerical computing. Reading books about thread programming, one
can easily get the impression that it is 'the' way to parallelize
numerical tasks on computers with multiple CPUs (or multiple CPU
cores). But if threads are inherently designed and implemented to stay
idle most of the time, that is obviously not the case.

I like MPI. Although it is a huge API with lots of esoteric functions,
I only need to know a handfull to cover my needs. Not to mention the
fact that I can use MPI with Fortran, which is frowned upon by computer
scientists but loved by scientists and engineers specialized in any
other field.



From gandalf at designaproduct.biz  Mon Jan 22 11:54:29 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Mon, 22 Jan 2007 17:54:29 +0100
Subject: closing a "forever" Server Socket
In-Reply-To: <1169482385.253887.249030@51g2000cwl.googlegroups.com>
References: <1169123381.930403.24170@38g2000cwa.googlegroups.com>	<1169143715.222186.30530@51g2000cwl.googlegroups.com>
	<1169482385.253887.249030@51g2000cwl.googlegroups.com>
Message-ID: <45B4EC45.80704@designaproduct.biz>

alessandro ?rta:
> thanks
>
> infact the server_forever() method is only a serve() method inside an
> infinite loop.
>
> many thanks again,
>   
Here is a snipped that show a "software terminateable threading TCP 
socker server". The "server" object is a SocketServer instance, 
server_stopped is a threading.Event instance. You should also import the 
"select" module.

        srvfd = server.fileno()
        while not server_stopped.isSet():
            ready = select.select([srvfd], [], [], 1) # Give one second 
for incoming connection so we can stop the server in seconds
            if srvfd in ready[0]:
                server.handle_request()
            else:
                pass  # log('No incoming connection, retrying')



From robin at reportlab.com  Wed Jan 17 05:30:36 2007
From: robin at reportlab.com (Robin Becker)
Date: Wed, 17 Jan 2007 10:30:36 +0000
Subject: 2.3-2.5 what improved?
Message-ID: <45ADFACC.6080807@chamonix.reportlab.co.uk>

A large cgi based web Python-2.3 application needs to be speed improved. 
experiments show the following under reasonable testing (these are 2 second 
reportlab pdf productions)

1) 2.3 --> 2.5 improvement small 1-2%
2) cgi --> fcgi improvement medium 10-12%

I sort of remember claims being made about 2.5 being 10% faster than 2.4/2.3 etc 
etc. Can anyone say where the speedups were? Presumably we have a lot of old 
cruft that could be improved in some way eg moving loops into comprehensions, 
using iterator methods etc. Are those sort of things what we should look at?
-- 
Robin Becker



From robert.kern at gmail.com  Fri Jan 26 13:46:40 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 26 Jan 2007 12:46:40 -0600
Subject: time series data and NumPy
In-Reply-To: <51us3uF1mdcpsU1@mid.uni-berlin.de>
References: <1169830757.220964.196540@m58g2000cwm.googlegroups.com>
	<51us3uF1mdcpsU1@mid.uni-berlin.de>
Message-ID: <epdiai$bgp$1@sea.gmane.org>

Diez B. Roggisch wrote:

> I'm pretty sure you're out of luck here - even _if_ NumPy would handle
> arbitrary data-types (AFAIK it doesn't, but then I'm not a total expert
> there), it certainly won't be able to make its hi-performance functions
> work on them.

Yes, one can make numpy arrays with "object" as its type. One can even extend
the C-level parts as well. For example, we have an experimental package in the
scipy sandbox for uniform time series that uses mx.DateTime.

  http://www.scipy.org/TimeSeriesPackage

> What you could do would be to convert the date-column into a timestamp,
> which is a int/long, and use that. Would that help?

This is frequently what I do. For dates, I like Modified Julian Day Numbers
although I am sure that would horrify some people more knowledgeable than I.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From horpner at yahoo.com  Tue Jan  9 09:43:00 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 9 Jan 2007 15:43:00 +0100
Subject: Determine an object is a subclass of another
References: <1168353205.066357.39530@42g2000cwt.googlegroups.com>
Message-ID: <slrneq7aiu.co.horpner@FIAD06.norwich.edu>

On 2007-01-09, abcd <codecraig at gmail.com> wrote:
> How can tell if an object is a subclass of something else?
>
> Imagine...
>
> class Thing:
>     pass
>
> class Animal:
>     pass
>
> class Dog:
>     pass
>
> d = Dog()
>
> I want to find out that 'd' is a Dog, Animal and Thing.  Such
> as...
>
> d is a Dog
> d is a Animal
> d is a Thing

isinstance(d, Dog)
isinstance(d, Animal)
isinstance(d, Thing)

Note that in your example d is not an instance of anything but
Dog. If you want a hierarchy, you must say so. Python doesn't
even try to make educated guesses.

class Thing:
  pass

class Animal(Thing):
  pass

class Dog(Animal):
  pass

-- 
Neil Cerutti


From vbgunz at gmail.com  Wed Jan  3 14:30:36 2007
From: vbgunz at gmail.com (vbgunz)
Date: 3 Jan 2007 11:30:36 -0800
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <459BCF07.6080302@v.loewis.de>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<1167543262.361311.123700@v33g2000cwv.googlegroups.com>
	<459BCF07.6080302@v.loewis.de>
Message-ID: <1167852636.403469.69220@h40g2000cwb.googlegroups.com>

> > I don't understand what all the fuss is about. Add a single page to the
> > installer and on it, have 3 radio buttons. The choices could be "add to
> > path (recommended)", "add to path with version", "do not add to path
> > (not recommended)".
>
> Please submit a patch to sf.net/projects/python that does so.

If I could I would. My only point jumping in here is this; adding
python to the path has got to be more beneficially productive for
everyone than not adding it at all. I don't even use Windows enough to
complain about it and I thought I'll voice my agreement on it.



From sjmachin at lexicon.net  Tue Jan  2 03:06:01 2007
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 02 Jan 2007 19:06:01 +1100
Subject: Writing more efficient code
In-Reply-To: <be5994b50701011923t3421bdf7oed284108f6a613d7@mail.gmail.com>
References: <mailman.2185.1167676577.32031.python-list@python.org>	
	<1167700810.404307.148620@k21g2000cwa.googlegroups.com>
	<be5994b50701011923t3421bdf7oed284108f6a613d7@mail.gmail.com>
Message-ID: <459A1269.6090500@lexicon.net>

On 2/01/2007 2:23 PM, gonzlobo wrote:
> Thanks to John, Paul & Jon for their responses. This list is great for 
> info.

Hi gonzlobo,

Please dont use private e-mail; post to the Python mailing-list / 
newsgroup, so that everybody can see what the eventual outcome is.

Please also answer the question that I asked: in effect, what you have 
showed looks like a hex dump of a binary fiie -- are you saying that the
data is actually transmitted over the serial bus in hex with spaces in 
between?

> 
> Jon,
> OCaml might be the best option, but my braincell is only good for 1
> language at a time. Hopefully python doesn't replace English.  :^)
> 
> Paul,
> Thanks for the snippets. It looks pretty complicated, but worth
> looking into. I'm all for reducing line of code (hopefully not for
> readability).
> 
> John M,
> You're right, my original example contained non-sensical data (I made
> it up for example's sake).

It wasn't me who wrote that, but I agree.

> 
> Here's a snippet of real data (it's a 10Mb/s serial bus, so there's
> *alot* of data).
> 0000007a 06 0321 80 00 34 d1 01 0b 3f f7 01 6b
> 0000007b 26 0311 00 00 00 00 1a bd 00 00 00 00
> 0000007c 06 0321 80 00 a0 04 81 eb 20 05 81 1b
> 0000007d 16 0614 00 00 00 00 00 00 00 00 00 00
> 0000007e 06 0321 80 00 20 00 01 07 a0 43 01 9b
> 0000007f 06 0301 80 00 a0 b9 82 2b 3f d6 02 ab
> 00000080 06 0321 80 00 bf d4 01 5b a3 f0 01 db
> 00000081 06 0301 80 00 31 9c 02 0b bf d7 02 15
> 00000082 0f 0416 01 01 00 00 20 20 20 20 20 20
> 00000083 06 0301 80 00 bf ff 02 6b bf f3 82 eb
> 00000084 0f 0416 02 01 00 00 20 20 20 20 20 20
> 00000085 06 0301 80 00 bf ed 82 1b a0 07 02 07
> 00000086 06 0321 00 00 00 00 01 af 00 00 00 00
> 00000087 26 0311 80 00 e0 ce 02 30 80 07 82 86
> 00000088 06 0301 80 00 a0 4a 02 9b 3f df 02 5b
> 00000089 06 0301 80 00 80 00 02 ce 80 00 02 b3
> 0000008a 06 0301 80 00 00 00 02 5f e0 00 02 89
> 0000008b 16 0614 00 fe 31 00 00 00 00 00 00 00
> 0000008c 43 03a1 01 00 80 00 02 5d 80 0b 06 5d
> 0000008d 06 0301 80 00 60 a1 92 c1 e0 a1 8a 21
> 0000008e 4f 0450 01 10 00 00 80 00 37 00 00 00
> 
> line = 0000007a 06 0321 80 00 34 d1 01 0b 3f f7 01 6b
          0....v....1....v....2....v....3....v....4....v

> Label 321 actually contains:
> 
>    time = line[:8]
>    PID = line[12:16]
>    d2 = line[17:19]
>    d3 = line[20:22]
>    d4 = line[23:25]
>    d5 = line[26:28]
>    d6 = line[29:31]
>    d7 = line[32:34]
>    d8 = line[35:37]
>    d9 = line[38:40]
>    d10 = line[41:43]
>    d11 = line[44:46]

That's not Python 101, it's PYBOL :-) I haven't had to resort to the 
0....v....1 etc caper for a very long time.

Consider doing this:

ints = [int(x, 16) for x in line.split()]
time = ints[0]
d = ints[1:]
pid = d[1]
# what is the undescribed field in ints[1]?


> 
> d2 + d3 = Pitch Angle (* 0.01)

I asked you before what you mean by "combine" ... now I'll ask what you 
mean by "d2 + d3"

Do you mean this:
     pitch_angle = (d[3] * 256 + d[2]) * 0.01
?


> d4 + d5 = Roll Angle (* 0.05)
> d6 + d8 = Magnetic Heading (* 0.05)

What happened to d7?

> d9 + d10 = Pressure Altitude (* 1.0)
> d11 = various flags


> 
> My code is python 101 (uses lots of nested if's), so using
> dictionaries would be very helpful.

Here's my Python 102 ... we can help you get to 201 level with a bit 
more disclosure from you on the specifics ...

| >>> line = "0000007a 06 0321 80 00 34 d1 01 0b 3f f7 01 6b"
| >>> ints = [int(x, 16) for x in line.split()]
| >>> ints
| [122, 6, 801, 128, 0, 52, 209, 1, 11, 63, 247, 1, 107]
| >>> time = ints[0]
| >>> time
| 122
| >>> d = ints[1:]
| >>> d
| [6, 801, 128, 0, 52, 209, 1, 11, 63, 247, 1, 107]
| >>> unknown = d[0]
| >>> unknown
| 6
| >>> pid = d[1]
| >>> pid
| 801
| >>> hex(pid)
| '0x321'
| >>> pitch_angle = (d[3] * 256 + d[2]) * 0.01
| >>> pitch_angle
| 1.28
| >>>

Call me crazy, but I'm highly suspicious of 0x8000 becoming a pitch 
angle of 1.28 degrees ;-) Especially since other lines in your sample 
with pid == 0x321 have (mostly) d2d3 == 0x8000 also, except for one with 
0x000 -- I'm not an aeronautical engineer, but I would have expected 
other values for pitch angle.

HTH,
John


From emin.shopper at gmail.com  Wed Jan 10 17:46:54 2007
From: emin.shopper at gmail.com (Emin)
Date: 10 Jan 2007 14:46:54 -0800
Subject: what is the idiom for copy lots of params into self?
Message-ID: <1168469214.452389.221180@p59g2000hsd.googlegroups.com>

Dear Experts,

When writing large classes, I sometimes find myself needing to copy a
lot of parameters from the argument of __init__ into self. Instead of
having twenty lines that all basically say something like self.x = x, I
often use __dict__ via something like:

class example:
     def __init__(self,a,b,c,d,e,f,g,h,i,j,k,l,m,n):
         for name in
['a','b','c','d','e','f','g','h','i','j','k','l','m','n']:
             self.__dict__[name] = locals()[name]

This saves a lot of code and makes it easier to see what is going on,
but it seems like there should be a better idiom for this task. Any
suggestions?

Thanks,
-Emin



From bg_ie at yahoo.com  Fri Jan 19 07:42:58 2007
From: bg_ie at yahoo.com (bg_ie at yahoo.com)
Date: 19 Jan 2007 04:42:58 -0800
Subject: Why do I have to call del explicitly for com objects?
Message-ID: <1169210578.544593.310100@v45g2000cwv.googlegroups.com>

Hi,

I'm creating objects in my python script belonging to a COM object
which I dispatch using win32com.client.DispatchEx. Hence, dllhost.dll
is the concerned process. The problem is that the objects destructor
within the com object is not called if the object lives past a certain
number of seconds. For example, this function will not call the
destructor concerned with obj unless the sleep is commented out.

def fnction:
  obj = comobj.createACertainObject()
  obj.doStuff()
  sleep(10)
  obj.doMoreStuff()
  #del obj

It seems to me that the GC forgets about obj after a certain amount of
time. I can force the destructor to be called using del obj at the end
of my function, but why do I have to call this explicitly?

Thanks for your help,

Barry.



From Thomas.Ploch at gmx.net  Sat Jan  6 15:33:32 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sat, 06 Jan 2007 21:33:32 +0100
Subject: Dividing integers...Convert to float first?
In-Reply-To: <1168050050.353467.185040@s80g2000cwa.googlegroups.com>
References: <1168017342.255981.134400@11g2000cwr.googlegroups.com>	<459E8B5C.6020804@gmx.net>
	<459E8C77.3020603@rpath.com>	<mailman.2337.1168019188.32031.python-list@python.org>
	<1168050050.353467.185040@s80g2000cwa.googlegroups.com>
Message-ID: <45A0079C.8050600@gmx.net>

Beliavsky schrieb:
> If the C or Fortran committees tried to change
> the meaning of int/int, they would be shot.

Or hanged...

> If you want to be confident that your code will run, unchanged, 10
> years from now on the hardware and OS that will then be common, Python
> 2.x is not the language to use, unfortunately. From what I have read,
> Python 3 will break things more fundamental than int/int.
> 

Yes, but until then we have to use python 2.x. And I think that python
2.x will be around quite a while after python 3000 has been released if
it breaks so much.

Thomas


From tinodb at gmail.com  Wed Jan  3 14:35:29 2007
From: tinodb at gmail.com (TiNo)
Date: Wed, 3 Jan 2007 14:35:29 -0500
Subject: bad marshal data in site.py in fresh 2.5 install win
In-Reply-To: <459bd136$0$20860$9b622d9e@news.freenet.de>
References: <mailman.2129.1167420492.32031.python-list@python.org>
	<4595B89C.9090208@v.loewis.de>
	<mailman.2161.1167505262.32031.python-list@python.org>
	<459bd136$0$20860$9b622d9e@news.freenet.de>
Message-ID: <435b46e50701031135k4fc9e944tc4fe2c8daf29557c@mail.gmail.com>

Removing aliases.pyc solved it.

Thank you.

2007/1/3, "Martin v. L?wis" <martin at v.loewis.de>:
> TiNo schrieb:
> >  File "F:\Python25\lib\encodings\__init__.py", line 32, in <module>
> >    from encodings import aliases
> > ValueError: bad marshal data
> >
> > also removed site.pyc, and run it again, but with the same result.
>
> It's likely rather aliases.pyc which is bad, so try removing that.
> If in doubt, remove all .pyc files.
>
> If one of them is bad, it's either because the stick wasn't ejected
> properly at some point, or it suffers from data loss.
>
> Regards,
> Martin
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From steven.bethard at gmail.com  Wed Jan  3 16:16:28 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 03 Jan 2007 14:16:28 -0700
Subject: When argparse will be in the python standard installation
In-Reply-To: <459C008D.5040404@v.loewis.de>
References: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>
	<459C008D.5040404@v.loewis.de>
Message-ID: <H-ydneqpW-axgAHYnZ2dnUVZ_qWvnZ2d@comcast.com>

Martin v. L?wis wrote:
> PengYu.UT at gmail.com schrieb:
>> I feel argparse has some useful things that optparse doesn't have. But
>> I can't find it argparse in python library reference. I'm wondering
>> when it will be available in the python standard installation.
> 
> On its own, never. Somebody has to contribute it to Python, and that
> somebody has to be the author.

As the author of argparse, I'm happy to contribute it, though I've been 
thinking that it would be more appropriate for the Python 3.0 line than 
the Python 2.X line.

> However, it would be better if missing features where provided in
> existing libraries, rather than introducing new libraries to replace
> the existing ones (i.e. I would likely reject a patch to add yet another
> argument parsing library - we already have getopt and optparse).

That was my original intention, and argparse started out using the 
optparse code. But optparse is quite difficult to extend, and in the 
end, when I found that I had monkey-patched or rewritten just about 
everything in optparse, I decided to drop the optparse code entirely.

If someone has an idea how to include argparse features into optparse, 
I'm certainly all for it. But I tried and failed to do this myself, so I 
don't know how to go about it.

STeVe


From hg at nospam.org  Mon Jan 22 10:42:42 2007
From: hg at nospam.org (hg)
Date: Mon, 22 Jan 2007 16:42:42 +0100
Subject: beep or sound playing under linux
References: <pFath.50034$oA1.40310@newsfe19.lga>
Message-ID: <q5bth.68253$kn7.32750@newsfe23.lga>

hg wrote:

> Hi,
> 
> Is there a way to do that ?
> 
> Regards,
> 
> hg

PS: I'm actually under wpPython


From felipe.lessa at gmail.com  Wed Jan 10 09:11:59 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Wed, 10 Jan 2007 12:11:59 -0200
Subject: maximum number of threads
In-Reply-To: <eo2rl6$41s$1@upsn250.cri.u-psud.fr>
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl>
	<mailman.2522.1168423062.32031.python-list@python.org>
	<mailman.2528.1168429308.32031.python-list@python.org>
	<eo2rl6$41s$1@upsn250.cri.u-psud.fr>
Message-ID: <c2701f5c0701100611u69732112v8b5e4782d0944ba@mail.gmail.com>

On 1/10/07, Laurent Pointal <laurent.pointal at limsi.fr> wrote:
> This is a system configurable limit (up to a maximum).
>
> See ulimit man pages.
>
> test
>
>         ulimit -a
>
> to see what are the current limits, and try with
>
>         ulimit -u 2000
>
> to modify the maximum number of user process (AFAIK each thread use a
> process entry on Linux)

I don't think it's only this.

---
$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
max nice                        (-e) 20
file size               (blocks, -f) unlimited
pending signals                 (-i) unlimited
max locked memory       (kbytes, -l) unlimited
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) unlimited
max rt priority                 (-r) unlimited
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) unlimited
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited
---

Well, unlimited number user processes. But:

---
$ python test.py
50
100
150
200
250
300
350
Exception raised: can't start new thread

Biggest number of threads: 382
---

The test.py script is attached.

-- 
Felipe.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: test.py
Type: text/x-python
Size: 427 bytes
Desc: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20070110/f6490060/attachment.py>

From jan.dries at dcube-resource.be  Tue Jan  2 11:03:47 2007
From: jan.dries at dcube-resource.be (Jan Dries)
Date: Tue, 02 Jan 2007 17:03:47 +0100
Subject: How do I add users using Python scripts on a Linux machine
In-Reply-To: <endrll$gjk$1@news1.carnet.hr>
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>	<mailman.2191.1167695021.32031.python-list@python.org>	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
Message-ID: <459A8263.50908@dcube-resource.be>

Ivan Voras wrote:
> Ramdas wrote:
>> Well,
>>
>> I need to add users from a web interface for a web server, which runs
>> only Python. I need to add users, set quotas and in future even look at
>> managing ip tables to limit bandwidth.
>>
>> I know os.system(), but this has to be done through a form entry
>> through a web interface.
>>
>> Anyways thanks, do advise if there more pythonic solutions
> 
> What you're looking for is actually a pretty complex thing. You *could*
> in theory manage /etc/passwd (and its "shadow" file) - you can find
> crypto primitives like MD5 and DES on the 'net, but note that you must
> run your script under the 'root' account in order to write (and even
> read!) the passwd database. The same goes for using os.system and the
> built-in OS utility. Be aware of security implications if you're running
> your web server under the root account.

A solution that is both more pythonic and avoids the problems listed 
above would be to migrate user management from /etc/passwd to an LDAP 
(though pam_ldap). That's the approach I took in a similar situation. 
Sure, it adds the overhead of setting up and running an LDAP, but 
managing users and their quota through python_ldap is much cleaner and 
more flexible than doing so using os.system(), certainly from within a 
web application.
That doesn't alter the fact though that security must be properly 
considered in any application that can add users.

Regards,
Jan


From researchbase at gmail.com  Sat Jan 20 14:12:28 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Sun, 21 Jan 2007 00:42:28 +0530
Subject: python packages and __name__ query.
Message-ID: <f81479dd0701201112i7f443c17w588ea3f6f7fc7d42@mail.gmail.com>

hello all,
I had previously mentioned my doubt and confusion about having a
main() to be an entry point in my python based software.
I am still having a particular doubt.
I use cx freze for creating a python executable.  my software is
essentially a package containing a few modules and one file where I
created the main() function.
if needed and suggested by experts I may as well put it in my
__init__.py file of the package.
coming back to the point.  where do I put the following code
if __name__ == "__main__":
   main()

I have 5 modules in my package each doing a specific task.
and a file that contains the main() function.  the 5 modules and the
exec.py file all are in the same package.  if it is a wrong practice
please correct me.
so plese clear my doubt given the above situation.
Krishnakant.


From nriley at gmail.com  Mon Jan  8 22:31:56 2007
From: nriley at gmail.com (nriley at gmail.com)
Date: 8 Jan 2007 19:31:56 -0800
Subject: Evolving doctests for changing output format
Message-ID: <1168313515.965895.86730@s80g2000cwa.googlegroups.com>

Hi,

I've got a number of doctests which rely on a certain output format,
and since I wrote the tests I've changed the output format.  Now,
almost all the tests fail.

What I'd like is if I could get doctest to take my tests, and
substitute the obtained output for the provided output.  Then, I could
in this case just replace the doctest file with the generated file, or
in general be able to run it through a file comparison tool so I could
examine the differences.

If it's not clear from the above, here's an example, assuming for the
sake of simplicity that Python somehow changed its default output base
between runs.

INPUT:
>> 10 + 10
20

OUTPUT:
>> 10 + 10
0x14

Is it possible to use doctest in such a "run-only" mode, or script the
above using its API?  I read the documentation several times but just
got further confused (sorry!).

Thanks,

--Nicholas



From nick at craig-wood.com  Sun Jan 21 15:30:07 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sun, 21 Jan 2007 14:30:07 -0600
Subject: mmap caching
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>
Message-ID: <slrner7h27.d8g.nick@irishsea.home.craig-wood.com>

George Sakkis <george.sakkis at gmail.com> wrote:
>  I've been trying to track down a memory leak (which I initially
>  attributed erroneously to numpy) and it turns out to be caused by a
>  memory mapped file. It seems that mmap caches without limit the chunks
>  it reads, as the memory usage grows to several hundreds MBs according
>  to the Windows task manager before it dies with a MemoryError. I'm
>  positive that these chunks are not referenced anywhere else; in fact if
>  I change the mmap object to a normal file, memory usage remains
>  constant. The documentation of mmap doesn't mention anything about
>  this. Can the caching strategy be modified at the user level ?

I'm not familiar with mmap() on windows, but assuming it works the
same way as unix...

The point of mmap() is to map files into memory.  It is completely up
to the OS to bring pages into memory for you to read / write to, and
completely up to the OS to get rid of them again.

What you would expect is that the file is demand paged into memory as
you access bits of it.  These pages will remain in memory until the OS
feels some memory pressure when the pages will be written out if dirty
and then dropped.

The OS will try to keep hold of pages as long as possible just in case
you need them again.  The pages dropped should be the least recently
used pages.

I wouldn't have expected a MemoryError though...

Did you do mmap.flush() after writing?

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


From S.Mientki-nospam at mailbox.kun.nl  Mon Jan 22 13:58:39 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Mon, 22 Jan 2007 19:58:39 +0100
Subject: (newbie) new version install (winXP) ?
Message-ID: <ba3e7$45b50950$d443bb3a$2324@news.speedlinq.nl>

I've been started with Python on winXP,
by installing the "Enthought" edition (about half a year old).
This works like a charm.
As a regular windows user,
I'm not used to install partial packages.
Now I find interesting application,
that require higher versions of certain packages.

Can I install only the higher version of a certain package ?
Is that done by simply copying them ?
Should I make a backup (of what) ?

thanks,
Stef Mientki


From steve at REMOVEME.cybersource.com.au  Wed Jan 31 01:39:56 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 31 Jan 2007 17:39:56 +1100
Subject: error messages containing unicode
References: <1170122515.980168.150960@p10g2000cwp.googlegroups.com>
	<pan.2007.01.30.02.48.10.853852@REMOVEME.cybersource.com.au>
	<1170160464.576122.62230@h3g2000cwc.googlegroups.com>
Message-ID: <pan.2007.01.31.06.39.55.881990@REMOVEME.cybersource.com.au>

On Tue, 30 Jan 2007 04:34:24 -0800, Jim wrote:

> Thank you for the reply.  It happens that, as I understand it, none of 
> the options that you mentioned is a solution for my situation.
> 
> On Jan 29, 9:48 pm, Steven D'Aprano <s... at REMOVEME.cybersource.com.au> 
> wrote:
>> The easiest ways to fix that are:
>>
>> (1) subclass an exception that already knows about Unicode;
>
> But I often raise one of Python's built-in errors.  And also, is it 
> really true that subclassing one of Python's built-ins give me 
> something that is unicode deficient?  I assumed that I had missed 
> something (because that's happened so many times before :-) ).

If the built-in isn't Unicode aware, subclassing it won't magically make
it so :-)


> For instance, I write a lot of CGI and I want to wrap everything in a 
> try .. except.
>   try:
>       main()
>   except Exception, err:
>       print "Terrible blunder: ",str(err)
> so that the err can be one of my exceptions, or can be one that came 
> with Python.
> (And, that I can see, err.args can be either the relevant 
> string or a tuple containing the relevant string and the documentation 
> is silent on whether in the built-in exceptions if err.args is a tuple 
> then the string is guaranteed to be first in the tuple.)

Does it matter? Just print the tuple.


>> (2) convert the file name to ASCII before you store it; or
>
> I need the non-ascii information, though, which is why I included it 
> in the error message.

If you have the exception captured in "err", then you can grab it with
err.where_i_put_the_unicode.


>> (3) add a __str__ method to your exception that is Unicode aware.
>
> I have two difficulties with this: (1) as above I often raise Python's
> built-in exceptions and for those __str__() is what it is, and 

Then don't use the built-in exception. If it won't do what you want it do
do, use something else.


> (2) this
> goes against the meaning of __str__() that I find in the documentation
> in ref/customization.html which says that the return value must be a
> string object.

I didn't mean return a unicode object :) 

You're absolutely correct. Your __str__ would need to return a string
object, which means encoding the Unicode correctly to get a string object
without raising an exception.

e.g. something like this maybe (untested, not thought-through, probably
won't work correctly, blah blah blah):

def __str__(self):
    s = self.args.encode('ascii', 'replace')
    return "Unicode error converted to plain ASCII:\n" + s

or whatever encoding scheme works for your application.

[snip]

>> >>> class MyBetterException(Exception):...     def __init__(self, arg):
>> ...             self.args = arg.encode('ascii', 'replace') ...         
>>    self.unicode_arg = arg  # save the original in case
>
> This is illuminating.  How do you know that for exceptions __init__()
> should take one non-self argument?  I missed finding this information.

It can take whatever you want it to take:

class MyStupidException(Exception):
    def __init__(self, dayofweek, breakfast="spam and baked beans",
        *everythingelse):
        self.day = dayofweek
        self.breakfast = breakfast
        self.args = everythingelse
    def __str__(self):
        s = "On %s I ate %s and then an error '%s' occurred." % \
        (self.day.title(), self.breakfast, self.args)
        return s


>>> raise MyStupidException('monday', 'cheese', 'bad things', 'happened', 2)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
__main__.MyStupidException: On Monday I ate cheese and then an error
'('bad things', 'happened', 2)' occurred.




-- 
Steven D'Aprano 



From paddy3118 at netscape.net  Tue Jan  9 02:17:00 2007
From: paddy3118 at netscape.net (Paddy)
Date: 8 Jan 2007 23:17:00 -0800
Subject: Colons, indentation and reformatting. (2)
In-Reply-To: <1168324924.666258.80030@42g2000cwt.googlegroups.com>
References: <1168323368.592642.314130@i15g2000cwa.googlegroups.com>
	<1168324924.666258.80030@42g2000cwt.googlegroups.com>
Message-ID: <1168327020.182467.125800@11g2000cwr.googlegroups.com>


mensanator at aol.com wrote:

> Paddy wrote:
> > I was just perusing a Wikipedia entry on the "off side rule" at
> > http://en.wikipedia.org/wiki/Off-side_rule .
> > It says that the colon in Python is purely for readability, and cites
> > our FAQ entry
> > http://www.python.org/doc/faq/general.html#why-are-colons-required-fo...
> >  .
> > However, near the top of the Alternatives section, it states that for C
> > type, curly braces using languages:
> >   "An advantage of this is that program code can be automatically
> > reformatted and neatly indented without fear of the block structure
> > changing".
> >
> > Thinking about it a little, it seems that a colon followed by
> > non-indented code that has just been pasted in could also be used by a
> > Python-aware editor as a flag to re-indent the pasted code.
>
> How would you re-indent this?
>
> if x>0: print x
If pasted as a line , after a line *ending with* a colon then indent it
w.r.t. previous line.
if pasting full lines after such a line then first pasted line cannot
be indented more than this line; if it is then flag for re-indenting
pasted block either equal too or less than this line.

- Paddy.



From attn.steven.kuo at gmail.com  Wed Jan 31 00:34:54 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 30 Jan 2007 21:34:54 -0800
Subject: grp.struct_group bug ?
In-Reply-To: <6uSvh.830201$5R2.500697@pd7urf3no>
References: <6uSvh.830201$5R2.500697@pd7urf3no>
Message-ID: <1170221694.174753.256060@p10g2000cwp.googlegroups.com>

On Jan 30, 5:42 pm, spam <x... at x.com> wrote:
> Is this a bug ?
>
> Running the following script with Python 2.3.5:
> ................
> #!/usr/bin/python
>
> import grp
>
> # groups = grp.getgrall()
>
> agroup = grp.getgrnam('wheel')
> print agroup
> print type(agroup)
>
> print agroup.__contains__('john')
> print agroup.__contains__('x')
> ................
>
> This is the output I get:
> ................
> ('wheel', 'x', 199, ['marcel', 'john', 'ben'])
> <type 'grp.struct_group'>
> False
> True
> ................
>
> I expected __contains__ to tell me if a given user is part of a group, but
> it seems that it's checking the password field ??



The tuple returned by getgrnam contains four fields:
the group id (gr_gid), a list of group members (gr_grmem),
the group name (gr_name), and the group password (gr_passwd).

If you want to see if user 'john' is in the list of group members,
use:

if 'john' in agroup.gr_mem:
    print "Found john in group wheel"

If you want to see if a password was set:

if agroup.gr_passwd == "":
    print "No group password was set for group wheel"

and so on.

--
Hope this helps,
Steven




From fredrik at pythonware.com  Mon Jan  8 11:09:32 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 08 Jan 2007 17:09:32 +0100
Subject: Bizarre floating-point output
In-Reply-To: <entpo0$d0g$1@gemini.csx.cam.ac.uk>
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk>
	<entj5d$o4$1@south.jnrs.ja.net>	<entkru$2vs$1@gemini.csx.cam.ac.uk>	<50f5snF1fb5uqU2@mid.individual.net>
	<entpo0$d0g$1@gemini.csx.cam.ac.uk>
Message-ID: <entqbs$3td$1@sea.gmane.org>

Nick Maclaren wrote:

> The use of different precisions for the two cases is not, however,
> and it is that I was and am referring to.

that's by design, of course.  maybe you should look "repr" up in the 
documentation ?

</F>



From Eric_Dexter at msn.com  Mon Jan  8 18:55:43 2007
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 8 Jan 2007 15:55:43 -0800
Subject: tkinter with wck
Message-ID: <1168300543.523210.308240@s34g2000cwa.googlegroups.com>

I am playing around with this code but I am having trouble getting my x
to be bigger it only seems to redraw when it becomes smaller than the
original size up to full size (in ui_handle_repair).  At other window
sizes it just seems to center it..  I tried playing around with resize
but never got that to do anything...  any ideas (I might be willing to
try other toolkits but the example looks very close to what I was
after)  http://www.dexrow.com

from Tkinter import Tk
from WCK import Widget

#from WCK import Widget

class CrossWidget(Widget):

    def ui_handle_repair(self, draw, x0, y0, x1, y1):
        black = self.ui_pen("black", 5)

        # draw a black cross
        draw.line((x0, y0, x1, y1), black)
        draw.line((x0, y1, x1, y0), black)

    def ui_handle_resize(self, width,height):

        black = self,ui_pen("black", 5)
        #draw.line((x0, y0, x1, y1), black)
        #draw.line((x0, y1, x1, y0), black)
        # center the text




root = Tk()

widget = CrossWidget(root)
widget.pack() #(expand=1, fill="both")

root.mainloop()



From gagsl-py at yahoo.com.ar  Wed Jan 31 21:49:27 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 31 Jan 2007 23:49:27 -0300
Subject: ctypes error on exit of win32 application
References: <1170281053.423976.85890@j27g2000cwj.googlegroups.com>
Message-ID: <op.tm1t4pzcsd1mbx@gabriel2.softlabbsas.com.ar>

En Wed, 31 Jan 2007 19:04:13 -0300, Rubic <rubic88 at gmail.com> escribi?:

> I'm attempting to use ctypes on a DLL with the following
> signature:
>
> __declspec(dllimport) void process_record(char *, char *);
>
> An example .cpp file has code like this:
>
>    int main(int argc, char **argv)
>    {
>       char record[100];
>       char code[6];
>         ...
>       process_record(code, record);
>
> When I invoke it under Python everything fine
> while the interpreter is running:
>
>    >>> from ctypes import *
>    >>> record = create_string_buffer("My Record")
>    >>> code = create_string_buffer('\000' * 6)
>    >>> cdll.grouper.process_recode(code, record)
>    >>> print code.value
>    '9999'
>
> But when the interpreter exits, either interactively
> or from a script, the following Program Error popup
> gets displayed:
>
>   "python.exe has generated errors and will be closed
>    by Windows.  You will need to restart the program."

Maybe process_record expects some minimum buffer size? The cpp example  
uses char record[100], but you are allocating only a few bytes with the  
string "My Record"

-- 
Gabriel Genellina



From bdesth.quelquechose at free.quelquepart.fr  Mon Jan 15 14:16:43 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 15 Jan 2007 20:16:43 +0100
Subject: How can I integrate RPC with WSGI ???
In-Reply-To: <1168667728.272747.186210@a75g2000cwd.googlegroups.com>
References: <1168667728.272747.186210@a75g2000cwd.googlegroups.com>
Message-ID: <45abcc9f$0$310$426a74cc@news.free.fr>

?????? a ?crit :
> How can I integrate RPC 

You mean xmlrpc or Soap ?

> with WSGI ???
>  is any methods for it??
> 

What's your problem exactly ?


From maxerickson at gmail.com  Thu Jan 11 10:01:24 2007
From: maxerickson at gmail.com (Max Erickson)
Date: Thu, 11 Jan 2007 15:01:24 +0000 (UTC)
Subject: Universal Feed Parser - How do I keep attributes?
References: <1168450723.340213.235690@o58g2000hsb.googlegroups.com>
	<7.0.1.0.0.20070111012646.03f5bdb8@yahoo.com.ar>
Message-ID: <Xns98B565F1D9250maxericksongmailcom@80.91.229.5>

Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:

> At Wednesday 10/1/2007 14:38, snewman18 at gmail.com wrote:
> 
>> >>> d =
>> >>> feedparser.parse('http://weather.yahooapis.com/forecastrss?p=
> 94089')
>> >>> d.feed.yweather_location
>>u''
> 
> You have to feed it the *contents* of the page, not its URL.
> 
> 

The online documentation disagrees with you:

http://feedparser.org/docs/introduction.html


max



From arkanes at gmail.com  Thu Jan  4 10:48:09 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 4 Jan 2007 09:48:09 -0600
Subject: Packaging up a Python/Twisted Matrix application...
In-Reply-To: <k09nh.8951$0F1.6975@trnddc02>
References: <k09nh.8951$0F1.6975@trnddc02>
Message-ID: <4866bea60701040748w7d67501atf4efaf27aa24c90@mail.gmail.com>

On 1/4/07, Chaz Ginger <cginboston at hotmail.com> wrote:
> I have a rather large Python/Twisted Matrix application that will be run
> on Windows, Linux and perhaps Macs. I was wondering if there are any
> tools that can be used to create an installer that will bring in Python,
> Twisted Matrix, my application libraries and anything else I need?
>
> I have tried using ezsetup with no luck (it seems not everything can be
> installed with it). I was hoping to find something as nice (and
> complete) as Perl's CPAN but can't seem to find anything.
>
> Does anyone have any recommendations?
>
> Peace,
> Chaz.
> --

For windows, py2exe is the de facto standard and it works fine with Twisted.

There are similar scripts for the other platforms but I'm not familiar
with them, I understand py2app is the standard for OS X.

Note that OS X and pretty much every version of linux ship with
Python, you might re-think your need to distribute a binary and
instead just use a distutils install.


From martin at v.loewis.de  Thu Jan  4 20:15:37 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 05 Jan 2007 02:15:37 +0100
Subject: minidom utf-8 encoding
In-Reply-To: <1167930869.836046.86840@42g2000cwt.googlegroups.com>
References: <1167868380.481121.154880@42g2000cwt.googlegroups.com>
	<459cbbce$0$15834$9b622d9e@news.freenet.de>
	<1167927887.745869.18260@q40g2000cwq.googlegroups.com>
	<459D2DEF.2060508@v.loewis.de>
	<1167930869.836046.86840@42g2000cwt.googlegroups.com>
Message-ID: <459da6ba$0$21574$9b622d9e@news.freenet.de>

fscked schrieb:
> # Create the <boxes> base element
> boxes = doc.createElement("boxes")
> myfile = open('ClientsXMLUpdate.txt')
> csvreader = csv.reader(myfile)
> for row in csvreader:
>     mainbox = doc.createElement("box")
>     doc.appendChild(boxes)
>     r2 = csv.reader(myfile)
>     b = r2.next()
>     mainbox.setAttribute("city", b[10])
> 
> And it just works...

You should not use it like that: it will only work if the CSV file is
encoded in UTF-8. If the CSV file uses any other encoding, the resulting
XML file will be ill-formed.

What you should do instead is

...
encoding_of_csv_file = some_value_that_the_producer_of_the_file_told_you
...
     ...
     mainbox.setAttribute("city", b[10].decode(encoding_of_csv_file))

Regards,
Martin


From shejo284 at gmail.com  Wed Jan  3 16:16:38 2007
From: shejo284 at gmail.com (Sheldon)
Date: 3 Jan 2007 13:16:38 -0800
Subject: Py_BuildValue or PyList_SetItem()
Message-ID: <1167858998.103361.222490@i12g2000cwa.googlegroups.com>

Hi,

I have a function that creates python objects out of C arrays and
returns them to Python. Below is a working example that I later want to
expand to return 12 arrays back to Python. The problem is that when I
print out the values in Python I get undesired reults. See below. Does
anyone know what is going on here?
The array values are good before the conversion.

**************************************
int createPythonObject(void) {
  int i,j,k;
  PyObject *Rva=PyList_New(12);

  for (i = 0; i < 12; i++) {
    PyObject *op = PyFloat_FromDouble((double)va[i]);
    if (PyList_SetItem(Rva,i,op) !=0) {
      fprintf(stderr,"Error in creating python va object\n");
      exit(EXIT_FAILURE);
    }
    Py_DECREF(op);
    op = 0;
  return Py_BuildValue("N",Rva);
 }

Results in Python:

<refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at
0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0
at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>,
<refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at
0x80d885c>, <refcnt 0 at 0x80d885c>


Any help is appreciated!

/Sheldon



From steve at REMOVE.THIS.cybersource.com.au  Thu Jan  4 06:30:19 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 04 Jan 2007 22:30:19 +1100
Subject: question on creating class
References: <1167895677.041759.230190@42g2000cwt.googlegroups.com>
Message-ID: <pan.2007.01.04.11.30.18.512087@REMOVE.THIS.cybersource.com.au>

On Wed, 03 Jan 2007 23:27:57 -0800, wcc wrote:

> Hello,
> 
> How do I create a class using a variable as the class name?

Try a "class factory".

def create_class(classname):
    class Klass(object):
        def __init__(self):
            print "Creating object of %s..." % self.__class__.__name__
        def method(self):
            print "This is a method."
    k = Klass
    k.__name__ = classname
    return k


>>> K = create_class("TestClass")
>>> obj = K()
Creating object of TestClass...



-- 
Steven.



From gert.cuykens at gmail.com  Sun Jan 21 17:16:37 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Sun, 21 Jan 2007 23:16:37 +0100
Subject: instancemethod
Message-ID: <ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a@mail.gmail.com>

import MySQLdb

class Db:

    _db=-1
    _cursor=-1

    @classmethod
    def __init__(self,server,user,password,database):
        self._db=MySQLdb.connect(server , user , password , database)
        self._cursor=self._db.cursor()

    @classmethod
    def excecute(self,cmd):
        self._cursor.execute(cmd)
        self._db.commit()

    @classmethod
    def rowcount(self):
        return int(self._cursor.rowcount)

    @classmethod
    def fetchone(self):
        return self._cursor.fetchone()

    @classmethod
    def close(self):
        self._cursor.close()
        self._db.close()

if __name__ == '__main__':
    gert=Db('localhost','root','******','gert')
    gert.excecute('select * from person')
    for x in range(0,gert.rowcount):
        print gert.fetchone()
    gert.close()

gert at gert:~$ python ./Desktop/svn/db/Py/db.py
Traceback (most recent call last):
  File "./Desktop/svn/db/Py/db.py", line 35, in <module>
    for x in range(0,gert.rowcount):
TypeError: range() integer end argument expected, got instancemethod.
gert at gert:~$

Can anybody explain what i must do in order to get integer instead of
a instance ?


From mark.dufour at gmail.com  Thu Jan 18 07:49:58 2007
From: mark.dufour at gmail.com (Mark Dufour)
Date: Thu, 18 Jan 2007 13:49:58 +0100
Subject: Shed Skin Python-to-C++ Compiler
Message-ID: <8180ef690701180449k71a7bd78k41bffc5f00973da2@mail.gmail.com>

hi all,

I have just released Shed Skin 0.0.18. besides many fixes and
optimizations, this release should work on OSX and 64-bit systems
(thanks john, larry, gustavo and denis!)

more interestingly, I collected 25 'largish' programs (at a total of
more than 6,000 lines!) that work fine with Shed Skin. these can be
downloaded from the Shed Skin homepage:

http://mark.dufour.googlepages.com

please let me know if you try out the latest release, and encounter
any problems or have any wishes.


thanks,
mark.
-- 
"One of my most productive days was throwing away 1000 lines of code"
- Ken Thompson


From paddy3118 at netscape.net  Sun Jan 21 22:51:40 2007
From: paddy3118 at netscape.net (Paddy)
Date: 21 Jan 2007 19:51:40 -0800
Subject: Is any python like linux shell?
In-Reply-To: <1169400157.075307.31340@l53g2000cwa.googlegroups.com>
References: <1169398326.510530.180860@51g2000cwl.googlegroups.com>
	<1169400157.075307.31340@l53g2000cwa.googlegroups.com>
Message-ID: <1169437900.726137.237650@51g2000cwl.googlegroups.com>


George Sakkis wrote:

> Frank Potter wrote:
>
> > I learned some python in windows.
> > And now I've turned to linux.
> > I read a book and it teaches how to write shell script with bash,
> > but I don't feel like the grammar of bash.
> > Since I know about python,
> > I want to get a linux shell which use python grammar.
> > I searched by google and I found pysh, which is not maintained any
> > more.
> > There's another script named pyshell, which is not likely what I'm
> > searching for.
> > So, will somebody please tell me if there are any python like shells
> > for linux?
>
> IPython is actually more than a simple shell. Give it a try:
> http://ipython.scipy.org/.
>
> George

Frank,
IPython is great, but it is not a replacement for a shell like bash. If
you have a Linux system then you still need to know the rudiments of
bash 

- Paddy.



From dummy at dummy.nl  Thu Jan 11 05:14:51 2007
From: dummy at dummy.nl (Cecil Westerhof)
Date: Thu, 11 Jan 2007 11:14:51 +0100
Subject: maximum number of threads
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl>
	<mailman.2522.1168423062.32031.python-list@python.org>
	<mailman.2528.1168429308.32031.python-list@python.org>
	<eo2rl6$41s$1@upsn250.cri.u-psud.fr>
	<mailman.2530.1168438321.32031.python-list@python.org>
Message-ID: <45a60e1b$0$336$e4fe514c@news.xs4all.nl>

Felipe Almeida Lessa wrote:

> $ python test.py
> 50
> 100
> 150
> 200
> 250
> 300
> 350
> Exception raised: can't start new thread

I tried your script on a PII 300 MHz and only 150 MB. I broke it of when it
reached more as 1,25 million. ;-}



From manstey at csu.edu.au  Wed Jan 31 00:15:53 2007
From: manstey at csu.edu.au (manstey)
Date: 30 Jan 2007 21:15:53 -0800
Subject: parent-child object design question
In-Reply-To: <mailman.3297.1170139632.32031.python-list@python.org>
References: <1170136965.015119.225920@q2g2000cwa.googlegroups.com>
	<mailman.3297.1170139632.32031.python-list@python.org>
Message-ID: <1170220553.843010.258260@a34g2000cwb.googlegroups.com>

Hi Ben,

Could I also do something like the following? What does it mean to
store the parent class as a private variable in the child class?

class CacheProperty(object):
        def __init__(self, obj, parent, properties=None):
            self.__data = obj
            self._parent = parent
            if properties is None:
                properties = {}
            self._accumulate_properties(properties)


        def _accumulate_properties(self, properties):
            self.properties = []
            for key, val in properties.iteritems():
                setattr(self, key, val)
                self.properties.append(key)


        def __getattr__(self, name):
            return getattr(self.__data, name)

        def set(self, property):
            return self._parent.set(property)

the set function allows us to call the parent set function within the
child, which is what we need to do.





From danb_83 at yahoo.com  Sat Jan 13 23:58:30 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 13 Jan 2007 20:58:30 -0800
Subject: indentation in python
In-Reply-To: <1168742956.828457.287610@m58g2000cwm.googlegroups.com>
References: <1168742956.828457.287610@m58g2000cwm.googlegroups.com>
Message-ID: <1168750708.059882.107750@v45g2000cwv.googlegroups.com>

On Jan 13, 8:49 pm, "lee" <libi... at gmail.com> wrote:
> Can anyone tell me the basics about indentation in python......how we
> use it in loops and constructs..etc....

It's just like indentation in other languages, except that it's
syntactically required.



From robert.kern at gmail.com  Wed Jan 24 14:47:41 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 24 Jan 2007 13:47:41 -0600
Subject: Simple Matrix class
In-Reply-To: <1169664540.120687.211350@s48g2000cws.googlegroups.com>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>	<mailman.3049.1169600368.32031.python-list@python.org>	<1169602411.917985.89840@l53g2000cwa.googlegroups.com>	<mailman.3051.1169604934.32031.python-list@python.org>	<1169617221.481444.135820@v45g2000cwv.googlegroups.com>	<mailman.3094.1169659321.32031.python-list@python.org>
	<1169664540.120687.211350@s48g2000cws.googlegroups.com>
Message-ID: <ep8d4t$uic$1@sea.gmane.org>

Paul McGuire wrote:
> And the purpose/motivation for "reimplementing it better" would be
> what, exactly?  So I can charge double for it?

So you can have accurate results, and you get a good linear solver out of the
process. The method you use is bad in terms of accuracy as well as efficiency.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From S.Mientki-nospam at mailbox.kun.nl  Sun Jan 21 18:44:33 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Mon, 22 Jan 2007 00:44:33 +0100
Subject: Python Windows Editors
In-Reply-To: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
Message-ID: <79e7c$45b3facb$d443bb3a$7251@news.speedlinq.nl>

W. Watson wrote:
> I downloaded python-2.5.msi and installed it. I believe its editor is 
> IDE. I understand there's a Win editor called pythonwin. I believe it's 
> in the download pywin32-210.win32-py2.5.exe, but I'm not sure if this 
> exe file has just the editor or all of Python. Comments? If not how do I 
> get the PythonWin editor by itself?
> 
> BTW, one of the features I did not like of IDE is the limited file Print 
> command. It puts everything in 16pt type, and gives no choice over what 
> pages should be printed. Maybe there's an option?
> 
>          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
>              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
>               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet
> 
>                Two laws Newton and Einstein didn't discover:
>                  1. Time is money.
>                  2. Matter will be damaged in direct proportion
>                     to its value.
there a too many (good) IDE's for Python ;-)
maybe we should give them a ranking,
I tried 2 of them, and only was stable enough:  PyScripter
  http://mmm-experts.com/Products.aspx?ProductID=4


cheers,
Stef Mientki


From exarkun at divmod.com  Wed Jan 31 11:37:05 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 31 Jan 2007 11:37:05 -0500
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <1170260637.679856.39920@k78g2000cwa.googlegroups.com>
Message-ID: <20070131163705.25807.435432639.divmod.quotient.4683@ohm>

On 31 Jan 2007 08:23:57 -0800, Frank Potter <could.net at gmail.com> wrote:
>I want to find a multithreaded downloading lib in python,
>can someone recommend one for me, please?
>Thanks~

There are no threads, but perhaps http://jcalderone.livejournal.com/24285.html
would be interesting to you.

Jean-Paul


From paddy3118 at netscape.net  Tue Jan 30 14:06:25 2007
From: paddy3118 at netscape.net (Paddy)
Date: 30 Jan 2007 11:06:25 -0800
Subject: data design
In-Reply-To: <45bf5763$0$22792$426a34cc@news.free.fr>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
Message-ID: <1170183985.871094.155720@q2g2000cwa.googlegroups.com>



On Jan 30, 2:34 pm, Imbaud Pierre <pierre.imb... at laposte.net> wrote:
> The applications I write are made of, lets say, algorithms and data.
> I mean constant data, dicts, tables, etc: to keep algorithms simple,
> describe what is peculiar, data dependent, as data rather than "case
> statements". These could be called configuration data.
>
> The lazy way to do this: have modules that initialize bunches of
> objects, attributes holding the data: the object is somehow the row of
> the "table", attribute names being the column. This is the way I
> proceeded up to now.
> Data input this way are almost "configuration data", with 2 big
> drawbacks:
>   - Only a python programmer can fix the file: this cant be called a
>     configuration file.
>   - Even for the author, these data aint easy to maintain.
>
> I feel pretty much ready to change this:
> - make these data true text data, easier to read and fix.
> - write the module that will make python objects out of these data:
> the extra cost should yield ease of use.
>
> 2 questions arise:
> - which kind of text data?
>      - csv: ok for simple attributes, not easy for lists or complex
>      data.
>      - xml: the form wont be easier to read than python code,
>        but an xml editor could be used, and a formal description
>        of what is expected can be used.
> - how can I make the data-to-object transformation both easy, and able
>    to spot errors in text data?
>
> Last, but not least: is there a python lib implementing at least part
> of this dream?
Google for YAML and JSON formats too.
http://www.yaml.org/
http://www.json.org/

-Paddy



From george.sakkis at gmail.com  Wed Jan 10 12:00:15 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 10 Jan 2007 09:00:15 -0800
Subject: An iterator with look-ahead
References: <slrneq9ubo.bg.horpner@FIAD06.norwich.edu>
Message-ID: <1168448415.599561.63420@77g2000hsv.googlegroups.com>

Neil Cerutti wrote:

> For use in a hand-coded parser I wrote the following simple
> iterator with look-ahead. I haven't thought too deeply about what
> peek ought to return when the iterator is exhausted. Suggestions
> are respectfully requested. As it is, you can't be sure what a
> peek() => None signifies until the next iteration unless you
> don't expect None in your sequence.

There is a different implementation in the Cookbook already:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/304373

George



From http  Sun Jan  7 22:37:07 2007
From: http (Paul Rubin)
Date: 07 Jan 2007 19:37:07 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<Heboh.7514$pQ3.6865@newsread4.news.pas.earthlink.net>
Message-ID: <7xhcv2195o.fsf@ruckus.brouhaha.com>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:
> I'd be quite concerned about the design environment rather than the
> immediate code... Probably need something ugly like...
> 
> from mod1 import B as B1
> from mod2 import B as B2
> class A(B1, B2):
> 	....

Interesting.  I just tried that.  mod1.py contains:

    class B:
        def foo(self): self.__x = 'mod1'

mod2.py contains:

    class B:
        def bar(self): self.__x = 'mod2'

And the test is:

    from mod1 import B as B1
    from mod2 import B as B2

    class A(B1, B2): pass

    a = A()
    a.foo()
    print a._B__x
    a.bar()
    print a._B__x

Sure enough, mod2 messes up mod1's private variable.


From gagsl-py at yahoo.com.ar  Sun Jan 28 21:15:44 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 28 Jan 2007 23:15:44 -0300
Subject: Trouble with max() and __cmp__()
In-Reply-To: <1170019291.084041.150780@h3g2000cwc.googlegroups.com>
References: <1170017167.165222.325800@a34g2000cwb.googlegroups.com>
	<slrnerq4ek.56n.wojciech_mula@cat.tac>
	<1170019291.084041.150780@h3g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20070128231242.04743e10@yahoo.com.ar>

At Sunday 28/1/2007 18:21, Thomas Nelson wrote:

><wojciech_m... at poczta.null.onet.pl.invalid> wrote:
> >Define method __gt__.
>
>This works, thanks.  I was a little surprised though. is __cmp__ used
>by any builtin functions?

The problem is, rich comparison functions take precedence over 
__cmp__, so if your base class (list in this case) already defines 
rich comparison, you have to redefine them all.
For simple cases, you can just redefine __cmp__ and reimplement all 
others __gt__, __lt__ etc using it.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From gdamjan at gmail.com  Sat Jan 27 10:17:11 2007
From: gdamjan at gmail.com (Damjan)
Date: Sat, 27 Jan 2007 16:17:11 +0100
Subject: problems with pyzeroconf and linux
References: <mailman.3184.1169794676.32031.python-list@python.org>
Message-ID: <45bb6d30$0$49196$14726298@news.sunsite.dk>


> I am trying to get pyzeroconf (http://sourceforge.net/projects/pyzeroconf)
> running on my machine but having trouble... Running the Zeroconf.py file
> seems to register the service, but is unable to find it.

You should be running avahi.. it also comes python support.

Here's an example that registers a CNAME that points to your hostname (that
avahi itself publishes)

#! /usr/bin/env python
import avahi, dbus
from encodings.idna import ToASCII

# Got these from /usr/include/avahi-common/defs.h
CLASS_IN = 0x01
TYPE_CNAME = 0x05

TTL = 60

def publish_cname(cname):
    bus = dbus.SystemBus()
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
avahi.DBUS_PATH_SERVER),
            avahi.DBUS_INTERFACE_SERVER)
    group = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
server.EntryGroupNew()),
            avahi.DBUS_INTERFACE_ENTRY_GROUP)

    rdata = createRR(server.GetHostNameFqdn())
    cname = encode_dns(cname)

    group.AddRecord(avahi.IF_UNSPEC, avahi.PROTO_UNSPEC, dbus.UInt32(0),
        cname, CLASS_IN, TYPE_CNAME, TTL, rdata)
    group.Commit()


def encode_dns(name):
    out = []
    for part in name.split('.'):
        if len(part) == 0: continue
        out.append(ToASCII(part))
    return '.'.join(out)

def createRR(name):
    out = []
    for part in name.split('.'):
        if len(part) == 0: continue
        out.append(chr(len(part)))
        out.append(ToASCII(part))
    out.append('\0')
    return ''.join(out)

if __name__ == '__main__':
    import time, sys, locale
    for each in sys.argv[1:]:
        name = unicode(each, locale.getpreferredencoding())
        publish_cname(name)
    try:
        while 1: time.sleep(60)
    except KeyboardInterrupt:
        print "Exiting"


-- 
damjan


From http  Mon Jan  8 02:49:21 2007
From: http (Paul Rubin)
Date: 07 Jan 2007 23:49:21 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
	<pan.2007.01.07.22.10.37.701405@REMOVE.THIS.cybersource.com.au>
	<7xlkke19he.fsf@ruckus.brouhaha.com>
	<pan.2007.01.08.07.28.02.494235@REMOVEME.cybersource.com.au>
Message-ID: <7xirfiyn3y.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> Just how often do you inherit from two identically-named classes
> both of which use identically-named private attributes?

I have no idea how often if ever.  I inherit from library classes all
the time, without trying to examine what superclasses they use.  If my
subclass happens to have the same name as a superclass of some library
class (say Tkinter) this could happen.  Whether it ever DOES happen, I
don't know, I could only find out by examining the implementation
details of every library class I ever use, and I could only prevent it
by remembering those details.  That is an abstraction leak and is
dangerous and unnecessary.  The name mangling scheme is a crock.  How
often does anyone ever have a good reason for using it, except maybe
in something like a debugger that can just as easily reach inside the
actual class descriptors and get all the variables out?


From nmm1 at cus.cam.ac.uk  Sun Jan 14 06:54:52 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 14 Jan 2007 11:54:52 GMT
Subject: Maths error
References: <eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org>
	<Xns98B7DEC646Ftim111one@216.196.97.136>
	<mailman.2713.1168771289.32031.python-list@python.org>
Message-ID: <eod5mc$lbd$1@gemini.csx.cam.ac.uk>


In article <mailman.2713.1168771289.32031.python-list at python.org>,
"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
|>  "Tim Peters" <tim.one at comcast.net> wrote:
|> 
|> > What you will still see stated is variations on Kahan's telegraphic 
|> > "binary is better than any other radix for error analysis (but not very 
|> > much)", listed as one of two techincal advantages for binary fp in:
|> > 
|> >     http://www.cs.berkeley.edu/~wkahan/MktgMath.pdf

Which I believe to be the final statement of the matter.  It was a minority
view 30 years ago, but I now know of little dissent.

He has omitted that mid-point invariant as a third advantage of binary,
but I agree that it could be phrased as "one or two extra mathematical
invariants hold for binary (but not very important ones)".

|> My basic error of thinking ( ? - more like gut feel ) was that the
|> bigger bases somehow lose "more bits" at every round, 
|> forgetting that half a microvolt is still half a microvolt, whether
|> it is rounded in binary, decimal, or hex...

That is not an error, but only a mistake :-)

Yes, you have hit the nail on the head.  Some people claimed that some
important algorithms did that, and that binary was consequently much
better.  If it were true, then the precision you would need would be
pro rata to the case - so the decimal equivalent of 64-bit binary would
need 160 bits.

Experience failed to confirm their viewpoint, and the effect was seen
in only artificial algorithms (sorry - I can no longer remember the
examples and am reluctant to waste time trying to reinvent them).  But
it was ALSO found that the converse was not QUITE true, either, and the 
effective numerical precision is not FULLY independent of the base.

So, at a wild guesstimate, 64-bit decimal will deliver a precision
comparable to about 56-bit binary, and will cause significant numerical
problems to a FEW applications.  Hence people will have to convert to
the much more expensive 128-bit decimal format for such work.

Bloatware rules.  All your bits are belong to us.


Regards,
Nick Maclaren.


From mike.klaas at gmail.com  Wed Jan 24 20:07:49 2007
From: mike.klaas at gmail.com (Klaas)
Date: 24 Jan 2007 17:07:49 -0800
Subject: The reliability of python threads
In-Reply-To: <7xveiwklt0.fsf@ruckus.brouhaha.com>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169683654.672020.136820@q2g2000cwa.googlegroups.com>
	<7xveiwklt0.fsf@ruckus.brouhaha.com>
Message-ID: <1169687269.885833.285410@a34g2000cwb.googlegroups.com>

On Jan 24, 4:11 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "Klaas" <mike.kl... at gmail.com> writes:
> > POSIX issues aside, Python's threading model should be less susceptible
> > to memory-barrier problems that are possible in other languages (this
> > is due to the GIL).

> But the GIL is not part of Python's threading model; it's just a
> particular implementation artifact.  Programs that rely on it are
> asking for trouble.

CPython is more that "a particular implementation" of python, and the
GIL is more than an "artifact".  It is a central tenet of threaded
python programming.

I don't advocate relying on the GIL to manage shared data when
threading, but 1) it is useful for the reasons I mention 2) the OP's
question was almost certainly about an application written for  and run
on CPython.

> > Double-checked locking, frinstance, is safe in python even though it
> > isn't in java.

> What's that?

google.com

-Mike



From nyenyec at gmail.com  Sun Jan  7 13:48:17 2007
From: nyenyec at gmail.com (nyenyec)
Date: 7 Jan 2007 10:48:17 -0800
Subject: urlib.quote gives KeyError in Python 2.4.4 but workin 2.3.5
Message-ID: <1168195697.483795.71160@38g2000cwa.googlegroups.com>

urllib.quote chokes on unicode in 2.4.4.

>>> print sys.version
2.4.4 (#1, Oct 18 2006, 10:34:39)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)]
>>> urllib.quote(u"\xe9")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File
"/Library/Frameworks/Python.framework/Versions/2.4//lib/python2.4/urllib.py",
line 1117, in quote
    res = map(safe_map.__getitem__, s)
KeyError: u'\xe9'

but it seems to work in Python 2.3.5

Python 2.3.5 (#1, Aug 19 2006, 21:31:42)
[GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys, urllib
>>> print sys.version
2.3.5 (#1, Aug 19 2006, 21:31:42)
[GCC 4.0.1 (Apple Computer, Inc. build 5363)]
>>> urllib.quote(u'\xe9')
'%E9'

Is this a known bug?

What's the workaround?

Thanks,
nyenyec



From duncan.booth at invalid.invalid  Mon Jan  8 05:33:54 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Jan 2007 10:33:54 GMT
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
Message-ID: <Xns98B269DCC12Fduncanbooth@127.0.0.1>

Laszlo Nagy <gandalf at designaproduct.biz> wrote:

> parallelpython at gmail.com wrote:
>> Has anybody tried to run parallel python applications?
>> It appears that if your application is computation-bound using 'thread'
>> or 'threading' modules will not get you any speedup. That is because
>> python interpreter uses GIL(Global Interpreter Lock) for internal
>> bookkeeping. The later allows only one python byte-code instruction to
>> be executed at a time even if you have a multiprocessor computer.
>> To overcome this limitation, I've created ppsmp module:
>> http://www.parallelpython.com
>> It provides an easy way to run parallel python applications on smp
>> computers.
>> I would appreciate any comments/suggestions regarding it.
>>   
> I always thought that if you use multiple processes (e.g. os.fork) then 
> Python can take advantage of multiple processors. I think the GIL locks 
> one processor only. The problem is that one interpreted can be run on 
> one processor only. Am I not right? Is your ppm module runs the same 
> interpreter on multiple processors? That would be very interesting, and 
> something new.
> 
The GIL locks all processors, but just for one process. So, yes, if you 
spawn off multiple processes then Python will take advantage of this. For 
example we run Zope on a couple of dual processor dual core systems, so we 
use squid and pound to ensure that the requests are spread across 4 
instances of Zope on each machine. That way we do get a fairly even cpu 
usage.

For some applications it is much harder to split the tasks across separate 
processes rather than just separate threads, but there is a benefit once 
you've done it since you can then distribute the processing across cpus on 
separate machines.

The 'parallel python' site seems very sparse on the details of how it is 
implemented but it looks like all it is doing is spawning some subprocesses 
and using some simple ipc to pass details of the calls and results. I can't 
tell from reading it what it is supposed to add over any of the other 
systems which do the same.

Combined with the closed source 'no redistribution' license I can't really 
see anyone using it.


From gigs at hi.t-com.hr  Mon Jan  8 16:32:12 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Mon, 08 Jan 2007 22:32:12 +0100
Subject: Bitwise expression
Message-ID: <enud98$960$1@ss408.t-com.hr>

Can someone explain me bitwise expression?
few examples for every expression will be nice

x << y Left shift
x >> y Right shift
x & y Bitwise AND
x | y Bitwise OR
x ^ y Bitwise XOR (exclusive OR)
~x Bitwise negation


thanks people


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan  8 10:19:19 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 08 Jan 2007 16:19:19 +0100
Subject: help: code formatter?
References: <entknh$8onl$1@zam602.zam.kfa-juelich.de>
Message-ID: <50f5nnF1fb5uqU1@mid.individual.net>

siggi wrote:

> as a newbie I have problems with formatting code of downloaded
> programs, because IDLE's reformatting capabilities are limited .
> Incorrect indentation, mixing of TAB with BLANKs or eol are often
> very nasty to correct.
> Is there a simple code formatter that first removes all
> indentations and then refomats correctly?

Why don't you just write one? :)

Seriously: Try.

BTW: Guessing to what amount of space TABs must be converted in
mixed source can be non-trivial.

Regards,


Bj?rn

-- 
BOFH excuse #289:

Interference between the keyboard and the chair.



From martin.witte at gmail.com  Thu Jan 25 08:10:32 2007
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 25 Jan 2007 05:10:32 -0800
Subject: While loop with "or"? Please help!
In-Reply-To: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
References: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
Message-ID: <1169730632.268861.321070@a75g2000cwd.googlegroups.com>



On Jan 25, 11:26 am, wd.jons... at gmail.com wrote:
> Hmm, my while loop with "or" doesn't seem to work as I want it to...
> How do I tell the while loop to only accept "Y" or "y" or "N" or "n"
> input from the str(raw_input)?
>
> Thank's in advance!
>
> Snippet of code:
>
> import os
>
> def buildfinder():
>     os.system("CLS")
>     GameRoot = os.getenv("GAME_ROOT") + "\\"
>
>     print "Do you want to use " + GameRoot + " as your source
> directory?"
>     usr = str(raw_input('Y/N: '))
>     return usr
>
> #Runs the buildfinder function
> usrinp = buildfinder()
>
> def buildwhiler():
>
>     while usrinp != "y" or "Y" or "N" or "n": <<<<----PROBLEM
>         print "Enter Y or N!"
>         usr = str(raw_input('Y/N: '))
>     else:
>         code continues

also note that your naming of variables contains two different names
for one variable...

better

usrinp = ''
while usrinp.lower() not in ('y', 'n'):
	usrinp = raw_input('Y/N: ') # and not usr....



From usenet at marlowa.plus.com  Thu Jan 18 02:57:26 2007
From: usenet at marlowa.plus.com (Andrew Marlow)
Date: Thu, 18 Jan 2007 08:57:26 +0100 (CET)
Subject: cannot import libxml2 python module on windoze using activePerl
	or Python IDLE
References: <eolj91$p6o$1@aioe.org>
	<2%trh.15630$X72.3002@newsread3.news.pas.earthlink.net>
Message-ID: <eon996$c7u$1@aioe.org>

On Wed, 17 Jan 2007 18:34:38 +0000, Dennis Lee Bieber wrote:

>> I am not sure how python packages get installed on windoze.
>> Please can anyone help?
> 
> http://www.google.com/search?hl=en&q=libxml2+python&btnG=Google+Search
> http://users.skynet.be/sbi/libxml-python/

Thanks very much!

-Andrew Marlow

-- 
There is an emerald here the size of a plover's egg!
Don't top-post  http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please      http://www.expita.com/nomime.html


From cjw at sympatico.ca  Sun Jan 14 08:52:57 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 14 Jan 2007 08:52:57 -0500
Subject: Decorators inside of class and decorator parameters
In-Reply-To: <eoca93$m0d$1@sea.gmane.org>
References: <1168728983.541526.202320@l53g2000cwa.googlegroups.com>
	<eoca93$m0d$1@sea.gmane.org>
Message-ID: <eodck0$32a$1@sea.gmane.org>

Gabriel Genellina wrote:
[snip]
> As said in the beginning, there is no use for decorators as methods (perhaps 
> someone can find a use case?)
Except, perhaps to indicate to the script reader that the decorator only 
applies within the class?

Colin W.
> If you move the example above inside the class, you get exactly the same 
> results.
> 
> HTH,
> 
> 



From jwaixs at gmail.com  Thu Jan 11 17:20:14 2007
From: jwaixs at gmail.com (Noud Aldenhoven)
Date: Thu, 11 Jan 2007 22:20:14 +0000
Subject: Rational Numbers
In-Reply-To: <eo65qk$bsr$1@sea.gmane.org>
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<eo65qk$bsr$1@sea.gmane.org>
Message-ID: <cb63d1e10701111420l28d0f0d0s35217370d86067b@mail.gmail.com>

On 1/11/07, Facundo Batista <facundo at taniquetil.com.ar> wrote:
>
> Python does not have rational numbers.


Ah, oke. Thank you, it seems I have enough information why they aren't
included in the core.

Question: Why do you say that it's a problem?


Well... Perhaps I word it wrong. It's not really a problem and if I need
rational numbers I'm smart enough to make an other algorithm that doesn't
need a build-in function for rational numbers.

I'm a mathematician (in learning, with a bad feeling for English) and don't
trust irrational numbers in programming languages.
It's, for example, in some cases it could be more efficient to compute an
irrational number with a rational numbers then using an advanced algorithm
of Euclides to compute the same.

To give a small example:

pi ~ 355/113
pi ~ 3.1415926

In my opinion the first one is better. But now I realise it's also the
slowest of the two implemented in python.

There are a (small) couple of other issues where rational numbers could be
handy. That's because rational numbers are exact, irrational numbers (in
python) aren't. But these issues are probably too mathematical to be used in
a programming language like python.

Regards,

Noud Aldenhoven

-- 
<:3 )~
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070111/25e3b963/attachment.html>

From bruno.desthuilliers at websiteburo.com  Tue Jan  9 10:08:37 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Tue, 09 Jan 2007 16:08:37 +0100
Subject: Determine an object is a subclass of another
In-Reply-To: <1168354891.334807.58940@s80g2000cwa.googlegroups.com>
References: <1168353205.066357.39530@42g2000cwt.googlegroups.com>
	<1168353975.285391.212350@m30g2000cwm.googlegroups.com>
	<1168354891.334807.58940@s80g2000cwa.googlegroups.com>
Message-ID: <45a3aff4$0$308$426a34cc@news.free.fr>

abcd a ?crit :
> yea i meant to have animal extend thing and dog extend animal....my
> mistake.
> 
> anyways, is there a way to check without having an instance of the
> class?
> 
> such as,
> 
> isinstance(Dog, (Animal, Thing)) ??
> 
> 
issubclass(Dog, Animal)

Note that such tests should only be used in a very few specific cases - 
certainly not to try&implement some kind of static typing... In Python, 
inheritance is mostly about implementation.



From martin at v.loewis.de  Thu Jan  4 11:40:15 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 04 Jan 2007 17:40:15 +0100
Subject: minidom utf-8 encoding
In-Reply-To: <1167927887.745869.18260@q40g2000cwq.googlegroups.com>
References: <1167868380.481121.154880@42g2000cwt.googlegroups.com>
	<459cbbce$0$15834$9b622d9e@news.freenet.de>
	<1167927887.745869.18260@q40g2000cwq.googlegroups.com>
Message-ID: <459D2DEF.2060508@v.loewis.de>

fscked schrieb:
> Well, let me clarify. If I just print it to the screen/console it works
> fine, but when I do:
> 
> out.write( doc.toprettyxml())
> 
> it just removes the character that would be the "?".
> 
> I can post the code if anyone wants to see it, but it is fairly
> straightforward.

I find that hard to believe. There is no code in Python that does
removal of characters, and I can't see any other reason why it gets
removed.

OTOH, what I do get when writing to a file is a UnicodeError, when
it tries to convert the Unicode string that toxml gives to a byte
string.

So I recommend you pass encoding="utf-8" to the toprettyxml invocation
also.

Regards,
Martin


From gagsl-py at yahoo.com.ar  Thu Jan  4 22:51:19 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 05 Jan 2007 00:51:19 -0300
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
Message-ID: <7.0.1.0.0.20070105004837.05b36d98@yahoo.com.ar>

At Thursday 4/1/2007 23:52, jeremito wrote:

>I am writing a class that is intended to be subclassed.  What is the
>proper way to indicate that a sub class must override a method?

If any subclass *must* override a method, raise NotImplementedError 
in the base class (apart from documenting how your class is supposed 
to be used).


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From piet at cs.uu.nl  Tue Jan  2 16:44:43 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Tue, 02 Jan 2007 22:44:43 +0100
Subject: How do I add users using Python scripts on a Linux machine
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
	<ene0j1$6nk$03$1@news.t-online.com>
Message-ID: <m2fyatcddg.fsf@ordesa.cs.uu.nl>

>>>>> Sebastian 'lunar' Wiesner <basti.wiesner at gmx.net> (SW) wrote:

>SW> Linux seems to ignore SUID bit on scripts:

The reason is that obeying SUID bits on scripts would be a security risk.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From hg at nospam.org  Mon Jan 15 03:55:50 2007
From: hg at nospam.org (hg)
Date: Mon, 15 Jan 2007 09:55:50 +0100
Subject: check if there is data in stdin without blocking
References: <4PMqh.47441$X97.9536@newsfe18.lga>
	<uhNqh.47996$X97.358@newsfe18.lga>
	<eog8hb$ke4$1@upsn250.cri.u-psud.fr>
Message-ID: <9uNqh.48239$X97.14123@newsfe18.lga>

Laurent Pointal wrote:

> hg a ?crit :
>> hg wrote:
>> 
>>> Hi,
>>>
>>> Is there a way ? ... select ?
>>>
>>>
>>>
>>> hg
>> PS:
>> 
>> import sys
>> import select
>> 
>> l_r = select.select([sys.stdin],[],[],0)
>> 
>> gives me:
>>   File "select.py", line 2, in ?
>>     import select
>>   File "/home/philippe/Desktop/select.py", line 4, in ?
>>     l_r = select.select([sys.stdin],[],[],0)
>> TypeError: 'module' object is not callable
>> 
>> 
> 
> Wont work under Windows:
>>>> help(select.select)
> ...<zip>...
>     *** IMPORTANT NOTICE ***
>     On Windows, only sockets are supported; on Unix, all file descriptors.
> 
> 
> 
> If under Unix, maybe sys.stdin.fileno() is a valid descriptor for
> select. Just test it.
> 
> And if under Windows, you may take a look at
> 22.1 msvcrt - Useful routines from the MS VC++ runtime
> 22.1.2 Console I/O
> kbhit( ) - Return true if a keypress is waiting to be read.


Well I'm testing under Linux but need support under Windows ... is there any
way to poll stdin somehow under both plateform ?

thanks,

hg







From egbert.bouwman at hccnet.nl  Wed Jan 24 13:04:39 2007
From: egbert.bouwman at hccnet.nl (egbert)
Date: Wed, 24 Jan 2007 19:04:39 +0100
Subject: Python does not play well with others
In-Reply-To: <xqxirex3psq.fsf@cola3.ca.boeing.com>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<xqxirex3psq.fsf@cola3.ca.boeing.com>
Message-ID: <20070124180439.GA18506@hccnet.nl>

On Wed, Jan 24, 2007 at 06:24:37AM +0000, Harry George wrote:
> 
> Perl - excellent modules and bindings for just about everything ...
> Java - a world of its own.  They reinvent the wheel instead of ...
> PHP - are we talking web scripts or serious programs?  Are you ...
> C - the portable assembler.  Solid, trusted, tunable ...
> C++ - objects tacked onto C; but that didn't work so invent ...
> Python - it just works.  Same scripts run on every platform ... 

What about C# ?
e
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From rrr at ronadam.com  Thu Jan 18 17:12:17 2007
From: rrr at ronadam.com (Ron Adam)
Date: Thu, 18 Jan 2007 16:12:17 -0600
Subject: Module name to filename and back?
In-Reply-To: <eoo5m6$cr9$1@sea.gmane.org>
References: <eoo5m6$cr9$1@sea.gmane.org>
Message-ID: <eoorkh$224$1@sea.gmane.org>

Ron Adam wrote:
> Is there a function to find a filename from a dotted module (or package) name 
> without importing it?
> 
> The imp function find_module() doesn't work with dotted file names.  And it 
> looks like it may import the file as it raises an ImportError error exception if 
>   it can't find the module. (Shouldn't it raise an IOError instead?)
> 
> What I'm looking for is to be able to get the full module name when I have a 
> filename.  And get the full filename when I have the module name.  And do both 
> of these without importing the module.
> 
>     modulename <==> filename
>     filename <==> modulename

I found a partial answer in trace.py.  It has a fullmodname() function, but it 
doesn't do any validation so the name it returns is a guess.  Starting with it I 
tried to make it a bit more complete, but it still needs work.  Seems like there 
should be an easier way.

Ron



def importname(path):
     """ Get module or package name from a path name.

         Return None if path is invalid, or name is not a
         valid (reachable) package or module.

     """
     path = os.path.normcase(path)
     if not os.path.exists(path):
         return
     if path.endswith(os.sep):
         path = path[:-1]
     longest = ""
     for dir in sys.path:
         dir = os.path.normcase(dir) + os.sep
         if path.startswith(dir):
             if len(dir) > len(longest):
                 longest = dir
     if longest:
         base = path[len(longest):]
     else:
         # should check if in current dir?
         return   # path not in search sys.path

     # This need a bit more work, it should also check
     # for valid parent packages too.
     if os.path.isdir(path):
         valid = False
         for ext in ['.py', '.pyc', '.pyo']:
             if os.path.isfile(os.path.join(path, '__init__' + ext)):
                 valid = True
                 break
         else:
             return

     base, ext = os.path.splitext(base)
     name = base.replace(os.sep, ".")
     if os.altsep:
         name = name.replace(os.altsep, ".")
     return name


path = "c:\\python25\\lib\\xml\\sax\\handler.py"
print importname(path)

prints --> xml.sax.handler




From bruno.desthuilliers at websiteburo.com  Tue Jan 23 03:17:11 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Tue, 23 Jan 2007 09:17:11 +0100
Subject: How to use dynamic properties? <-- Noob
In-Reply-To: <mailman.3017.1169539276.32031.python-list@python.org>
References: <mailman.3017.1169539276.32031.python-list@python.org>
Message-ID: <45b5c44c$0$22813$426a34cc@news.free.fr>

Sean Schertell a ?crit :
> person.name = 'Joe'
> person.age = 20
> person.sex = 'm'
> 
> info_I_need = name
> 
> print person.info_I_need
> 
> # How can I make it print 'Joe' ?
> 

print getattr(person, "name")



From malaclypse2 at gmail.com  Tue Jan  9 08:34:44 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Tue, 9 Jan 2007 08:34:44 -0500
Subject: formattazione cifra con decimali
In-Reply-To: <1168335821.473566.220190@38g2000cwa.googlegroups.com>
References: <1168335548.504284.287150@q40g2000cwq.googlegroups.com>
	<1168335821.473566.220190@38g2000cwa.googlegroups.com>
Message-ID: <16651e80701090534n49176d9dtaf9d929fda548173@mail.gmail.com>

On 9 Jan 2007 01:43:41 -0800, Nuke <andrea.massa at gmail.com> wrote:
> I need to visualize a number (or a string of that number) using the
> decimal separator.
> i have this number visualized: 50320,12 and i need that the
> visualization of this number is: 50.320,13.
> There is a function that directly convert the number (or the string) ?

I'm not very familiar with locale-aware programming in Python, but
this may get you started:

>>> import locale

>>> locale.setlocale(locale.LC_ALL, 'it')
'Italian_Italy.1252'

>>> locale.format("%0.2f", 50320.12, grouping=True)
'50.320,12'

See http://docs.python.org/lib/module-locale.html for documentation on
the locale module.

-- 
Jerry


From james-netnews at and.org  Tue Jan 16 15:33:52 2007
From: james-netnews at and.org (James Antill)
Date: Tue, 16 Jan 2007 14:33:52 -0600
Subject: Globbing files by their creation date
References: <1168954453.954486.188680@m58g2000cwm.googlegroups.com>
	<mailman.2774.1168955078.32031.python-list@python.org>
Message-ID: <6L2dnaxFNt0tqzDYnZ2dnUVZ_vPinZ2d@99main.com>

On Tue, 16 Jan 2007 07:44:29 -0600, skip wrote:

> Thomas> I've used glob.glob to create a list of all files whose name
>     Thomas> matches a substring, but I don't see how I can use it to
>     Thomas> identify files by their creation date.
> 
> Sumthin' like:
> 
>     files = [f for f in glob.glob(globpat)
>                    if os.path.getctime(f) > timethreshold]
> 
> Define globpat and timethreshold accordingly.  You sure you don't mean
> modification time?  If so, change getctime to getmtime.

help(os.path.getctime)

getctime(filename)
    Return the metadata change time of a file, reported by os.stat().

 Note that _change_ time != creation time. Also for all files you probably
want os.listdir() instead of glob.

-- 
James Antill -- james at and.org
http://www.and.org/and-httpd/ -- $2,000 security guarantee
http://www.and.org/vstr/


From ptmcg at austin.rr._bogus_.com  Sat Jan 13 11:04:17 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sat, 13 Jan 2007 10:04:17 -0600
Subject: Boilerplate in rich comparison methods
References: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>
	<1168674664.792869.213260@m58g2000cwm.googlegroups.com>
Message-ID: <45a90301$0$7677$4c368faf@roadrunner.com>

"George Sakkis" <george.sakkis at gmail.com> wrote in message 
news:1168674664.792869.213260 at m58g2000cwm.googlegroups.com...
> Steven D'Aprano wrote:
>
>> I'm writing a class that implements rich comparisons, and I find myself
>> writing a lot of very similar code. If the calculation is short and
>> simple, I do something like this:
>>
>>
>> class Parrot:
>>     def __eq__(self, other):
>>         return self.plumage() == other.plumage()
<snip>
>> If the comparison requires a lot of work, I'll do something like this:
>>
>> class Aardvark:
>>     def __le__(self, other):
>>         return lots_of_work(self, other)
>>     def __gt__(self, other):
>>         return not self <= other
<snip>
> Once upon a time I had written a metaclass to generate the boilerate,
> filling in the gaps. It doesn't impose any constraints on which
> comparisons you must implement, e.g you may implement __le__ and
> __eq__, or __gt__ and __ne__, etc. Season to taste.
>
> http://rafb.net/p/mpvsIQ37.nln.html
>
> George
>

Just a side note on writing these comparison operators.  I remember when 
learning Java that this was really the first time I spent so much time 
reading about testing-for-identity vs. testing-for-equality.  The Java 
conventional practice at the time was to begin each test-for-equality method 
by testing to see if an object were being compared against itself, and if 
so, cut to the chase and return True (and the converse for an inequality 
comparison).  The idea behind this was that there were ostensibly many times 
in code where an object was being compared against itself (not so much in an 
explicit "if x==x" but in implicit tests such as list searching and 
filtering), and this upfront test-for-identity, being very fast, could 
short-circuit an otherwise needless comparison.

In Python, this would look like:

class Parrot:
    def __eq__(self, other):
        return self is other or self.plumage() == other.plumage()
    def __ne__(self, other):
        return self is not other and self.plumage() != other.plumage()
    def __lt__(self, other):
        return self is not other and self.plumage() < other.plumage()
    def __gt__(self, other):
        return self is not other and self.plumage() > other.plumage()
    def __le__(self, other):
        return self is not other and self.plumage() <= other.plumage()
    def __ge__(self, other):
        return self is not other and self.plumage() >= other.plumage()

and George's metaclass would have similar changes.

On the other hand, I haven't seen this idiom in any Python code that I've 
read, and I wonder if this was just a coding fad of the time.

Still, in cases such as Steven's Aardark class, it might be worth bypassing 
something that calls lots_of_work if you tested first to see if self is not 
other.

-- Paul




From fredrik at pythonware.com  Fri Jan  5 07:30:08 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 5 Jan 2007 13:30:08 +0100
Subject: Change coords of a canvas.line item
References: <enlfps$aka$1@anderson.hrz.tu-chemnitz.de>
Message-ID: <enlgcg$ckt$1@sea.gmane.org>

Matthias Vodel wrote:

> I want to change the beginning/end-coordinates of a canvas.line item.
>
> Something like:
>
> self.myCanvas.itemconfigure(item_id, coords=(x1_new, y1_new, x2_new, y2_new))

    self.myCanvas.coords(item_id, x1_new, y1_new, x2_new, y2_new)

</F> 





From bjourne at gmail.com  Mon Jan 22 07:33:07 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Mon, 22 Jan 2007 13:33:07 +0100
Subject: Getting to an SSH account over a HTTP proxy
Message-ID: <740c3aec0701220433j7620a090i2ad72f06150f079c@mail.gmail.com>

I want to use Python to connect to a SSH account over a HTTP proxy to
automate some operations. I thought paramiko would be able to do that,
but it can not (it seems).

Is there some other Python module that can do what I want?

-- 
mvh Bj?rn


From scott.daniels at acm.org  Mon Jan 15 23:13:07 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Mon, 15 Jan 2007 20:13:07 -0800
Subject: Maths error
In-Reply-To: <Xns98B4E769834AAtim111one@216.196.97.136>
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
	<envur1$rq1$1@gemini.csx.cam.ac.uk>
	<mailman.2480.1168350033.32031.python-list@python.org>
	<Xns98B384E126F4Ctim111one@216.196.97.136>
	<eo0mjf$i4h$1@gemini.csx.cam.ac.uk>
	<Xns98B3A00749D6tim111one@216.196.97.136>
	<eo2c3l$5v2$1@gemini.csx.cam.ac.uk>
	<Xns98B4E769834AAtim111one@216.196.97.136>
Message-ID: <45ac45fa$1@nntp0.pdx.net>

Tim Peters wrote:
> ...  Alas, most people wouldn't read that either <0.5 wink>.
Oh the loss, you missed the chance for a <0.499997684987 wink>.

--Scott David Daniels
scott.daniels at acm.org


From gherron at islandtraining.com  Fri Jan 26 04:08:57 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 26 Jan 2007 01:08:57 -0800
Subject: how to remove c++ comments from a cpp file?
In-Reply-To: <1169801197.941449.303000@v33g2000cwv.googlegroups.com>
References: <1169801197.941449.303000@v33g2000cwv.googlegroups.com>
Message-ID: <45B9C529.3000308@islandtraining.com>

Frank Potter wrote:
> I only want to remove the comments which begin with "//".
> I did like this, but it doesn't work.
>
> r=re.compile(ur"//[^\r\n]+$", re.UNICODE|re.VERBOSE)
> f=file.open("mycpp.cpp","r")
> f=unicode(f,"utf8")
> r.sub(ur"",f)
>
> Will somebody show me the right way?
> Thanks~~
>
>   
If you expect help with a problem, it would be nice if you told us what 
the problem is. What error did you get?

But even without that I see lots of errors:

You must import re before you use it:
import re

Open a file with open((..) not file.open(...).

Once you open the file you must *read* the contents and operate on that:
data = f.read()

Then you ought to close the file:
f.close()

Now you can do your sub on the string in data -- but note, THIS WON'T 
CHANGE data, but rather returns a new string which you must assign to 
something:

new_data = r.sub(ur"", data)

Then do something with the new string.

Also I fear your regular expression is incorrect.

Cheers,
Gary Herron





From tundra at tundraware.com  Mon Jan  8 11:43:53 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Mon, 08 Jan 2007 10:43:53 -0600
Subject: Walking The Right Path
In-Reply-To: <b38a74-ul4.ln1@eskimo.tundraware.com>
References: <ghe974-gau2.ln1@eskimo.tundraware.com>
	<1168252155.427645.316470@38g2000cwa.googlegroups.com>
	<b38a74-ul4.ln1@eskimo.tundraware.com>
Message-ID: <2v8a74-c45.ln1@eskimo.tundraware.com>

Tim Daneliuk wrote:
> Jakub Stolarski wrote:
>> Tim Daneliuk napisal(a):

>>> IOW, is there a way to return a symlink-based path which contains
>>> the symlink pointer as is was *defined* not as it expands?
>>>
>>
>> One way (but very ugly):
>> print os.path._resolve_link('/bar')
>>
> 
> Yup, that does just what I want.  By why, pray tell, do you consider it
> ugly ...?
> 
> 

Whoops - that doesn't do it either.  If I have this:

/foo -> /usr/bar
/usr/bar -> /usr1/bar

Then realpath or _resolve_link both return "/usr1/bar" when given "/foo"
(when what I want is "/usr/bar").  There is obviously some underlying
OS support to do this (in this case FreeBSD 4.x) because 'ls' shows
things as I prefer them - i.e. Links are shown as assigned not how they
actually resolve...
-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From chris at telestatic.net  Wed Jan  3 00:32:33 2007
From: chris at telestatic.net (Chris Ashurst)
Date: Wed, 03 Jan 2007 00:32:33 -0500
Subject: Synchronization methodology
Message-ID: <459B3FF1.9030604@telestatic.net>

Hi, I'm coming in from a despised Java background, and I'm having some 
trouble wrapping my head around sharing an object between multiple 
instances of a single class (in simpler terms, I would say imagine a 
simple chat server that has to share a list of connected users to each 
instance of a connected user).

Usually, I would have a synchronized list instantiated inside each 
instance of a client class, which would do the trick, but since there's 
no synchronization in Python, I'm stuck staring at little tests 
involving a standalone non-threaded class instance that holds the list 
of users, and each connected user being passed this instance to be 
"synchronized".

Now, whilst this *works*, it just doesn't feel right, and I would 
appreciate it if anyone has any more Pythonic expressions of this paradigm.

Note that I have looked at Twisted (and I use it for other stuff), but 
I'm wanting to do things at a lower level (because I'm masochistic), and 
I feel like all the fun has been sucked out of programming by basically 
telling Twisted what I want and have it do it for me invisibly.

Thanks!


~Chris



From banaouas.medialog at wanadoo.fr  Tue Jan 16 11:06:53 2007
From: banaouas.medialog at wanadoo.fr (m.banaouas)
Date: Tue, 16 Jan 2007 17:06:53 +0100
Subject: urllib2 and HTTPBasicAuthHandler
Message-ID: <45acf775$0$5070$ba4acef3@news.orange.fr>

Hi all,
I started to use urllib2 library and HTTPBasicAuthHandler class in order 
to authenticate with a http server (Zope in this case).
I don't know why but it doesn't work, while authenticating with direct 
headers manipulation works fine!

WinXP Sp2
Python 2.4.4

Thanks in advance for your help/comments

# TestAuthHandler.py
import base64, httplib, urllib2
httplib.HTTPConnection.debuglevel = 1
#
def TestAuth(method):
   data = 
{'prot':'http','user':'admin','pass':'xxxxxx','host':'localhost','port':'8080','path':'manage','realm':'Zope'}
   url = '%(prot)s://%(host)s:%(port)s/%(path)s' % data
   req = urllib2.Request(url)
   #
   if (method == 'headers'):
     base64string = base64.encodestring('%s:%s' % (data['user'], 
data['pass']))[:-1]
     req.add_header("Authorization", "Basic %s" % base64string)
   elif  (method == 'handler'):
     auth_url = '%(host)s:%(port)s/%(path)s' % data
     auth_handler = urllib2.HTTPBasicAuthHandler()
     auth_handler.add_password(data['realm'], auth_url, data['user'], 
data['pass'])
     opener = urllib2.build_opener(auth_handler)
     urllib2.install_opener(opener)
   #
   f = urllib2.urlopen(req)
   data = f.read()
   print data
#
TestAuth('headers')
TestAuth('handler')
-------------------------
output:
-------------------------
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" 
"http://www.w3.org/TR/REC-html40/loose.dtd">
<html>
<head>
<title>Zope on http://localhost:8080</title>
</head>
... all right page ...
</html>


Traceback (most recent call last):
   File "C:\Test\TestAuthHandler.py", line 25, in ?
     TestAuth('handler')
   File "C:\Test\TestAuthHandler.py", line 20, in TestAuth
     f = urllib2.urlopen(req)
   File "C:\Python\Lib\urllib2.py", line 130, in urlopen
     return _opener.open(url, data)
   File "C:\Python\Lib\urllib2.py", line 364, in open
     response = meth(req, response)
   File "C:\Python\Lib\urllib2.py", line 471, in http_response
     response = self.parent.error(
   File "C:\Python\Lib\urllib2.py", line 402, in error
     return self._call_chain(*args)
   File "C:\Python\Lib\urllib2.py", line 337, in _call_chain
     result = func(*args)
   File "C:\Python\Lib\urllib2.py", line 480, in http_error_default
     raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 401: Unauthorized

Process "Python" completed with Exit Code 1, at 16/01/2007 16:51:18.


From shejo284 at gmail.com  Wed Jan  3 17:15:58 2007
From: shejo284 at gmail.com (Sheldon)
Date: 3 Jan 2007 14:15:58 -0800
Subject: Py_BuildValue or PyList_SetItem()
In-Reply-To: <mailman.2257.1167859969.32031.python-list@python.org>
References: <1167858998.103361.222490@i12g2000cwa.googlegroups.com>
	<mailman.2257.1167859969.32031.python-list@python.org>
Message-ID: <1167862558.280976.58490@k21g2000cwa.googlegroups.com>


Jack Diederich skrev:

> On Wed, Jan 03, 2007 at 01:16:38PM -0800, Sheldon wrote:
> > I have a function that creates python objects out of C arrays and
> > returns them to Python. Below is a working example that I later want to
> > expand to return 12 arrays back to Python. The problem is that when I
> > print out the values in Python I get undesired reults. See below. Does
> > anyone know what is going on here?
> > The array values are good before the conversion.
> >
> > **************************************
> > int createPythonObject(void) {
> >   int i,j,k;
> >   PyObject *Rva=PyList_New(12);
> >
> >   for (i = 0; i < 12; i++) {
> >     PyObject *op = PyFloat_FromDouble((double)va[i]);
> >     if (PyList_SetItem(Rva,i,op) !=0) {
> >       fprintf(stderr,"Error in creating python va object\n");
> >       exit(EXIT_FAILURE);
> >     }
> >     Py_DECREF(op);
> >     op = 0;
> >   return Py_BuildValue("N",Rva);
> >  }
> >
> > Results in Python:
> >
> > <refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at
> > 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0
> > at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>,
> > <refcnt 0 at 0x80d885c>, <refcnt 0 at 0x80d885c>, <refcnt 0 at
> > 0x80d885c>, <refcnt 0 at 0x80d885c>
> >
>
> PyList_SetItem steals a reference to "op" so DECREF'ing it reduces
> the refcount to zero.
>
> http://docs.python.org/api/listObjects.html
> 
> -Jack

Thanks Jack,

It works now!

/Sheldon



From kernel1983 at gmail.com  Tue Jan 16 22:18:19 2007
From: kernel1983 at gmail.com (kernel1983)
Date: 16 Jan 2007 19:18:19 -0800
Subject: How can I write code using FP
Message-ID: <1169003899.592015.300290@s34g2000cwa.googlegroups.com>

In Function Program?Language can use like this:

define a function:
f = lambda x,y:x,y

then we use f to define another function:
f2 = f(1)
the f2 should equal to:
f2=lambda y:1,y

we should be able call f2 with one parameter:f2(2)
just return 1,2

but how can I implement the characteristic in Python??I think it could
do like this but HOW-TO?

thanks~~~
I'm a English beginner!
I wish somebody understand my meaning



From rrr at ronadam.com  Tue Jan 16 00:27:40 2007
From: rrr at ronadam.com (Ron Adam)
Date: Mon, 15 Jan 2007 23:27:40 -0600
Subject: assert versus print [was Re: The curious behavior of   integer
	objects]
In-Reply-To: <pan.2007.01.16.03.42.32.179793@REMOVEME.cybersource.com.au>
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>	<mailman.2744.1168901460.32031.python-list@python.org>	<pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>	<76fd5acf0701151838l1a724be5n3f1e1fda629d1464@mail.gmail.com>	<mailman.2762.1168916788.32031.python-list@python.org>
	<pan.2007.01.16.03.42.32.179793@REMOVEME.cybersource.com.au>
Message-ID: <eoho0q$79v$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Mon, 15 Jan 2007 21:01:35 -0600, Ron Adam wrote:
> 
> 
>> There have been times where I would like assert to be a little more assertive 
>> than it is.  :-)
>>
>> ie.. not being able to turn them off with the -0/-00 switches, and having them 
>> generate a more verbose traceback.
> 
> If you want something more verbose, you have it:
> 
>>>> assert False, "verbose traceback"
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AssertionError: verbose traceback
> 
> If you want something that won't be turned off by -O, you maybe need to
> write your own:
> 
> def assert_(condition, msg=""):
>     if not condition:
>         raise AssertionError(msg)
> 
>> Maybe have an alternative 'warn' as an alternative debugging version that could 
>> be set to ignore, soft (print to log), and hard (raise an error).
> 
> Check out the warnings module.

Yes, I know it's there.  It just seems like assert and warn() overlap currently. 
  Assert doesn't quite fill warn()'s shoes, and warn() isn't as unassertive as 
assert when it's turned off.

A warn statement could be completely ignored and not even cost a function call 
when it's turned off like assert does now.  I don't think it does that 
currently. Isn't there always some overhead when using the warn() function. Or 
is there some magic there?

An if-raise is just as fast as assert when evaluating as True, so there's no 
speed advantage there unless you have a large percentage of raises.  But it does 
looks a lot nicer when you want a short positive test, verses a longer negative 
test with a raise stuck on it.

But I think the developers would not consider this to be a big enough matter to 
be worth changing.  So I'll continue to ignore warn(), and also continue to be 
un-assertive in my python code.

Cheers,
    Ron



From bj_666 at gmx.net  Wed Jan 31 03:22:36 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 31 Jan 2007 09:22:36 +0100
Subject: Random passwords generation (Python vs Perl) =)
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<epl3la$10g0$1@ulysses.news.tiscali.de>
	<1170088693.768440.26580@h3g2000cwc.googlegroups.com>
	<1170090408.495646.85720@v33g2000cwv.googlegroups.com>
	<1170108446.671609.169400@j27g2000cwj.googlegroups.com>
	<1170216508.396176.187780@v33g2000cwv.googlegroups.com>
Message-ID: <pan.2007.01.31.08.22.35.708071@gmx.net>

In <1170216508.396176.187780 at v33g2000cwv.googlegroups.com>,
Hieu.D.Hoang at gmail.com wrote:

> And can anyone explain why this is so?
>>>> while 1: input(__import__('os').urandom(6).encode('base64'))
> ...
> BgiWdv//
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "<string>", line 0
> 
>     ^
> SyntaxError: unexpected EOF while parsing

It's `input()` that expects a valid Python expression.  An empty one
doesn't work, it has to evaluate to something.

In [2]: input()

------------------------------------------------------------
   File "<string>", line 0

     ^
SyntaxError: unexpected EOF while parsing

Ciao,
	Marc 'BlackJack' Rintsch



From gandalf at designaproduct.biz  Mon Jan  8 13:20:51 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Mon, 08 Jan 2007 19:20:51 +0100
Subject: xmlrpc and auth-digest
In-Reply-To: <uUuoh.217$TO.6980@se2-cb104-9.zrh1.ch.colt.net>
References: <uUuoh.217$TO.6980@se2-cb104-9.zrh1.ch.colt.net>
Message-ID: <45A28B83.2040107@designaproduct.biz>

Thomas Liesner ?rta:
> Hi all,
>
> this may have been asked before, but as a newbie with xmlrpc i can't
> find any suitable info on that. Sorry.
> I am trying to write a simple xmlrpc-client in python and the server i
> am trying to receive data from requires http auth digest.
> The info on xmlrpclib covers auth basic thrugh url econding such as
> "user:pass at server", but no auth digest.
>
> Is there any other library i could use for that or can i write some sort
> of wrapper around this using a differnt library like urllib?
>   
What I did before is that I added additional parameters of my published 
functions for the username and the password, and used xmlrpc over https. 
This is secure, but somewhat clumsy.  You can also implement this by 
creating a persistent "session" when logging in, then use the session 
identifier for identification.

If you are interested in XML/RPC over HTTPS:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/496786

Regarding basic or digest http authentication, I believe it has nothing 
to do with the XML/RPC protocol itself. The basic and digest 
authentication is defined at the HTTP level. It is implemented with HTTP 
headers. Probably you can do this but not with the built-in xmlrpclib. 
If you look at xmlrpclib.py, then you will see that the ServerProxy 
class is an old style class that uses the xmlrpclib.Transport class for 
communication. The Transport class itself uses httplib to post the 
information. In theory, you can copy your own xmlrpclib and send/check 
extra http headers. In my opinion, it would be too much work, too much 
trouble and still not secure.

Regards,

  Laszlo




From khemkaamit at gmail.com  Thu Jan 11 23:55:27 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Fri, 12 Jan 2007 10:25:27 +0530
Subject: Explanation about for loop
In-Reply-To: <1168577299.485773.8160@q2g2000cwa.googlegroups.com>
References: <1168577299.485773.8160@q2g2000cwa.googlegroups.com>
Message-ID: <1360b7230701112055o1ce37e0eqafab1e8027f17900@mail.gmail.com>

On 11 Jan 2007 20:48:19 -0800, raghu <vgvr620034 at gmail.com> wrote:
> can any one help me explaining for loop and its execution and its
> syntax with a simple example.

Well Guido did that:
http://docs.python.org/tut/node6.html#SECTION006200000000000000000


-- 
----
Amit Khemka -- onyomo.com
Home Page: www.cse.iitd.ernet.in/~csd00377
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From Laurent.LAFFONT-ST at adixen.fr  Mon Jan 15 02:27:30 2007
From: Laurent.LAFFONT-ST at adixen.fr (Laurent.LAFFONT-ST at adixen.fr)
Date: Mon, 15 Jan 2007 08:27:30 +0100
Subject: Class list of a module
Message-ID: <OF26C969EB.BAFF11A0-ONC1257264.002723D2-C1257264.0028BCA1@an.cit.alcatel.fr>

Hi,

I want to get all classes of a module in a list. I wrote this code but I 
wonder
if there's not a simpler solution


import inspect

def getClassList(aModule):
    return [getattr(aModule, attName) \
            for attName in aModule.__dict__  \
            if inspect.isclass(getattr(aModule, attName))]

Regards,

Laurent Laffont 


From Bulkan at gmail.com  Wed Jan 17 22:35:20 2007
From: Bulkan at gmail.com (placid)
Date: 17 Jan 2007 19:35:20 -0800
Subject: Projects anyone?
In-Reply-To: <mailman.2794.1168985093.32031.python-list@python.org>
References: <1168949268.618793.102890@l53g2000cwa.googlegroups.com>
	<mailman.2794.1168985093.32031.python-list@python.org>
Message-ID: <1169091320.842359.181010@m58g2000cwm.googlegroups.com>

Thanks for all the help. I have some projects that i will look into and
see if i can contribute anything

Cheers

Ben Finney wrote:
> "placid" <Bulkan at gmail.com> writes:
>
> > I'm looking for anyone who is working on a project at the moment that
> > needs help (volunteer).
>
> The Volunteer Opportunities page is a bit thin at the moment. I'd hope
> people can respond to this thread and update that page with other
> projects that need help.
>
>     <URL:http://wiki.python.org/moin/VolunteerOpportunities>
>
> The Coding Project Ideas page is more specifically focussed on getting
> programmer help.
>
>     <URL:http://wiki.python.org/moin/CodingProjectIdeas>
>
> Browse the Cheese Shop for packages that you'd like to improve, and
> offer your help to the project maintainer.
>
>     <URL:http://cheeseshop.python.org/pypi/>
>
> --
>  \       "A 'No' uttered from deepest conviction is better and greater |
>   `\       than a 'Yes' merely uttered to please, or what is worse, to |
> _o__)                               avoid trouble."  -- Mahatma Gandhi |
> Ben Finney



From bdesth.quelquechose at free.quelquepart.fr  Sun Jan  7 12:50:39 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 07 Jan 2007 18:50:39 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <45a0b4e3$0$19089$4fafbaef@reader4.news.tin.it>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
	<7xd55rzke9.fsf@ruckus.brouhaha.com>
	<45a0b4e3$0$19089$4fafbaef@reader4.news.tin.it>
Message-ID: <45a12cb0$0$300$426a74cc@news.free.fr>

Andrea Griffini a ?crit :
> Paul Rubin wrote:
> 
>  > Yes I've had plenty of
> 
>> pointer related bugs in C programs that don't happen in GC'd
>> languages, so GC in that sense saves my ass all the time.
> 
> 
> My experience is different, I never suffered a lot for
> leaking or dangling pointers in C++ programs; and on
> the opposite I didn't expect that fighting with object
> leaking in complex python applications was that difficult
> (I've heard of zope applications that just gave up and
> resorted to the "reboot every now and then" solution).
> 
Zope is a special case here, since it relies on an object database...


From steven.bethard at gmail.com  Sun Jan 21 23:20:26 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 21 Jan 2007 21:20:26 -0700
Subject: pyparsing Combine without merging sub-expressions
In-Reply-To: <cbPsh.16892$X72.13619@newsread3.news.pas.earthlink.net>
References: <D8OdnfDqyvnyHS_YnZ2dnUVZ_syunZ2d@comcast.com>
	<cbPsh.16892$X72.13619@newsread3.news.pas.earthlink.net>
Message-ID: <AJKdnfNI5rwbpinYnZ2dnUVZ_sPinZ2d@comcast.com>

Dennis Lee Bieber wrote:
> On Sat, 20 Jan 2007 13:49:52 -0700, Steven Bethard
> <steven.bethard at gmail.com> declaimed the following in comp.lang.python:
> 
>> Within a larger pyparsing grammar, I have something that looks like::
>>
>>      wsj/00/wsj_0003.mrg
>>
>> When parsing this, I'd like to keep around both the full string, and the 
>> AAA_NNNN substring of it, so I'd like something like::
>>
>>      >>> foo.parseString('wsj/00/wsj_0003.mrg')
>>      (['wsj/00/wsj_0003.mrg', 'wsj_0003'], {})
>>
> 	If working file name/paths, why not use the functions in os.path?

Two reasons.  First, as I mentioned, this is within a larger pyparsing 
grammar so it's not as easy to switch back and forth between the two. 
Second, I do want to do some data validation (e.g. the name of the file 
needs to be in a particular format) so I either need to post-process the 
os.path approach or just do it in pyparsing.


>> But that then allows whitespace between the pieces of the path, which 
>> there shouldn't be::
>>
> 	If you didn't have whitespace coming in, there shouldn't be any
> going out. If you do, you likely have malformed data and probably should
> detect it earlier...

Well that's the intention of using pyparsing here.  With a proper 
grammar, pyparsing can detect the malformed data for me and throw an error.

STeVe


From pythonnews at nospam.jmbc.fr  Wed Jan 17 04:26:57 2007
From: pythonnews at nospam.jmbc.fr (jean-michel bain-cornu)
Date: Wed, 17 Jan 2007 10:26:57 +0100
Subject: smtplib question
In-Reply-To: <mailman.2788.1168970387.32031.python-list@python.org>
References: <B63066172.350.8440.3@mxextra>
	<mailman.2788.1168970387.32031.python-list@python.org>
Message-ID: <45adebf2$0$21147$7a628cd7@news.club-internet.fr>

>> The mail server in my organization is MS exchange. Obviously I can 
>> email to
>> any email address from my MS outlook.
>>
>> What's the easiest way to fix the program?
> 
> You will need to get smtplib to authenticate when connecting to the
> exchange server.    Use the login function and the same username/pw
> that you use to login to Outlook.
> 
> server.login(user, password)
> 
> Note: Your exchange administrator may have disabled this function.  (
> Your Outlook will almost certainly be using MAPI not SMTP to talk to
> the server).
> 
It's very often a pain to talk with Exchange.
If Outlook Web Access is enabled, you can use urlib/urllib2 to send your 
emails exactly like you'd do it by a web browser. It's sometimes easier 
than using the regular smtplib capabilities.
Regards,
jm


From lrahuel.notgood at voila.fr  Fri Jan 26 10:23:39 2007
From: lrahuel.notgood at voila.fr (Laurent Rahuel)
Date: Fri, 26 Jan 2007 16:23:39 +0100
Subject: how to remove c++ comments from a cpp file?
References: <1169801197.941449.303000@v33g2000cwv.googlegroups.com>
	<mailman.3190.1169802638.32031.python-list@python.org>
	<1169805244.879280.235660@v45g2000cwv.googlegroups.com>
	<mailman.3191.1169807705.32031.python-list@python.org>
Message-ID: <45ba1cfe$0$5084$ba4acef3@news.orange.fr>

And using the codecs module

[CODE]
import codecs

f = codecs.open("show_btchina.user.js","r","utf-8")
modf = codecs.open("modified.js","w","utf-8")
for line in f:
     idx = line.find(u"//")
     if idx==0:
         continue
     elif idx>0:
         line = line[:idx]+u'\n'
     modf.write(line)
modf.close()
f.close()
[/CODE]

Gabriel Genellina wrote:

> At Friday 26/1/2007 06:54, Frank Potter wrote:
> 
>>[CODE]
>>import re
>>
>>f=open("show_btchina.user.js","r").read()
>>f=unicode(f,"utf8")
>>
>>r=re.compile(ur"//[^\r\n]+$", re.UNICODE|re.VERBOSE)
>>f_new=r.sub(ur"",f)
>>
>>open("modified.js","w").write(f_new.encode("utf8"))
>>[/CODE]
>>
>>And, the problem is, it seems that only the last comment is removed.
>>How can I remove all of the comments, please?
> 
> Note that it's not as easy as simply deleting from // to end of line,
> because those characters might be inside a string literal. But if you
> can afford the risk, this is a simple way without re:
> 
> f = open("show_btchina.user.js","r")
> modf = open("modified.js","w")
> for line in f:
>      uline=unicode(line,"utf8")
>      idx = uline.find("//")
>      if idx==0:
>          continue
>      elif idx>0:
>          uline = uline[:idx]+'\n'
>      modf.write(uline.encode("utf8"))
> modf.close()
> f.close()
> 
> 



From simon at brunningonline.net  Fri Jan 12 15:07:04 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 12 Jan 2007 20:07:04 +0000
Subject: Rational Numbers
In-Reply-To: <45A7E8E9.8060105@gmx.net>
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<mailman.2597.1168550439.32031.python-list@python.org>
	<eo6ia5$5bt$1@gemini.csx.cam.ac.uk>
	<mailman.2643.1168611301.32031.python-list@python.org>
	<eo883j$l9d$1@gemini.csx.cam.ac.uk>
	<mailman.2648.1168616202.32031.python-list@python.org>
	<eo8b1r$r9c$1@gemini.csx.cam.ac.uk>
	<8c7f10c60701121134q35bf7c27h7c4b5cf1dcfe44ca@mail.gmail.com>
	<45A7E8E9.8060105@gmx.net>
Message-ID: <8c7f10c60701121207s31ec614dnea5d4b543deb2d12@mail.gmail.com>

On 1/12/07, Thomas Ploch <Thomas.Ploch at gmx.net> wrote:
> Do not forget:
>
> - Time
> - Personal Data (like birthdays, age)

The datetime module has perfectly good classes for holding date and
time values, and age sounds like an integer to me.

-- 
Cheers,
Simon B
simon at brunningonline.net


From nszabolcs at gmail.com  Mon Jan 29 10:24:25 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 29 Jan 2007 07:24:25 -0800
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <1170083692.114100.109100@k78g2000cwa.googlegroups.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<7x3b5uwfa2.fsf@ruckus.brouhaha.com>
	<1170082883.393745.244840@a34g2000cwb.googlegroups.com>
	<7x64apzx8f.fsf@ruckus.brouhaha.com>
	<1170083692.114100.109100@k78g2000cwa.googlegroups.com>
Message-ID: <1170084265.620244.276140@v45g2000cwv.googlegroups.com>


> Is os.urandom cryptographically strong on all platforms?

http://docs.python.org/lib/os-miscfunc.html

"The returned data should be unpredictable enough for cryptographic 
applications, though its exact quality depends on the OS 
implementation."



From beej at beej.us  Tue Jan 30 02:29:30 2007
From: beej at beej.us (Beej)
Date: 29 Jan 2007 23:29:30 -0800
Subject: Data structure and algorithms
In-Reply-To: <HnBvh.16132$pQ3.503@newsread4.news.pas.earthlink.net>
References: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
	<1170095416.261460.157660@a34g2000cwb.googlegroups.com>
	<1170107403.836795.211280@k78g2000cwa.googlegroups.com>
	<HnBvh.16132$pQ3.503@newsread4.news.pas.earthlink.net>
Message-ID: <1170142170.842412.147370@a34g2000cwb.googlegroups.com>

On Jan 29, 10:15 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> The instructor learned his lesson: no more assignments
> done in "any language I <instructor> can understand"

Without naming names, there was a person at my university who gained a 
certain amount of notoriety by implementing a file system for OS class 
in Bourne Shell.

That prof also changed the rule the very next semester. :-)

-Beej



From paul at boddie.org.uk  Fri Jan 12 05:21:28 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 12 Jan 2007 02:21:28 -0800
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
Message-ID: <1168597288.571937.176430@s34g2000cwa.googlegroups.com>

parallelpyt... at gmail.com wrote:
>
> The main difference between MPI python solutions and ppsmp is that with
> MPI you have to organize both computations
> {MPI_Comm_rank(MPI_COMM_WORLD, &id); if id==1 then ... else ....} and
> data distribution (MPI_Send / MPI_Recv) by yourself. While with ppsmp
> you just submit a function with arguments to the execution server and
> retrieve the results later.

Couldn't you just provide similar conveniences on top of MPI? Searching
for "Python MPI" yields a lot of existing work (as does "Python PVM"),
so perhaps someone has already done so. Also, what about various grid
toolkits?

[...]

> Overall ppsmp is still work in progress and there are other interesting
> features which I would like to implement. This is the main reason why I
> do not open the source of ppsmp - to have better control of its future
> development, as advised here: http://en.wikipedia.org/wiki/Freeware :-)

Despite various probable reactions from people who will claim that
they're comfortable with binary-only products from a single vendor, I
think more people would be inclined to look at your software if you did
distribute the source code, even if they then disregarded what you've
done. My own experience with regard to releasing software is that even
with an open source licence, most people are likely to ignore your
projects than to suddenly jump on board and take control, and even if
your project somehow struck a chord and attracted a lot of interested
developers, would it really be such a bad thing? Many developers have
different experiences and insights which can only make your project
better, anyway.

Related to your work, I've released a parallel execution solution
called parallel/pprocess [1] under the LGPL and haven't really heard
about anyone really doing anything with it, let alone forking it and
showing my original efforts in a bad light. Perhaps most of the
downloaders believe me to be barking up the wrong tree (or just
barking) with the approach I've taken, but I think the best thing is to
abandon any fears of not doing things the best possible way and just be
open to improvements and suggestions.

Paul

[1] http://www.python.org/pypi/parallel



From jgodoy at gmail.com  Sat Jan 13 13:42:16 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sat, 13 Jan 2007 16:42:16 -0200
Subject: template engine
References: <pan.2007.01.13.18.29.24.499240@gmail.com>
Message-ID: <8764ba7oqf.fsf@gmail.com>

piotr <piotrlewalski at gmail.com> writes:

(...)

> for user was not empty call function again with argument "user/name"
> then engine should replace specific placeholders with results of my
> callback function
> obviously this is just example syntax, I hope you catch the idea
>
> that would be nice if engine could work with non HTML documents.
>
> thanks in advance for your help, and sorry for my English :)

Take a look at Kid (http://www.kid-templating.org/) and Genshi
(http://genshi.edgewall.org/).

-- 
Jorge Godoy      <jgodoy at gmail.com>


From hg at nospam.org  Tue Jan  9 04:24:16 2007
From: hg at nospam.org (hg)
Date: Tue, 09 Jan 2007 10:24:16 +0100
Subject: Xah's Edu Corner: Introduction to 3D Graphics Programing
References: <1166836083.084101.25870@73g2000cwn.googlegroups.com>
	<458d7899$0$8725$ed2619ec@ptn-nntp-reader02.plus.net>
	<1167208399.089326.213540@a3g2000cwd.googlegroups.com>
Message-ID: <DkPoh.21303$kn7.16808@newsfe23.lga>

Xah Lee wrote:

> I don't know OpenGL, but i think it is a low-level crap, and have done
> the industry huge irreparable damage the same way unix has.

So you _are_ psychic ! is the end of the world be in 2007 ?






From parallelpython at gmail.com  Sat Jan  6 18:52:35 2007
From: parallelpython at gmail.com (parallelpython at gmail.com)
Date: 6 Jan 2007 15:52:35 -0800
Subject: Parallel Python
Message-ID: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>

Has anybody tried to run parallel python applications?
It appears that if your application is computation-bound using 'thread'
or 'threading' modules will not get you any speedup. That is because
python interpreter uses GIL(Global Interpreter Lock) for internal
bookkeeping. The later allows only one python byte-code instruction to
be executed at a time even if you have a multiprocessor computer.
To overcome this limitation, I've created ppsmp module:
http://www.parallelpython.com
It provides an easy way to run parallel python applications on smp
computers.
I would appreciate any comments/suggestions regarding it.
Thank you!



From gagsl-py at yahoo.com.ar  Mon Jan  8 12:35:03 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 08 Jan 2007 14:35:03 -0300
Subject: multi-threaded webcam with SimpleAsyncHTTPServer.py
In-Reply-To: <6.2.3.4.2.20070107203507.02e77240@pop-server.san.rr.com>
References: <6.2.3.4.2.20070107203507.02e77240@pop-server.san.rr.com>
Message-ID: <7.0.1.0.0.20070108143117.05c36860@yahoo.com.ar>

At Monday 8/1/2007 02:44, Ray Schumacher wrote:

>Question, though: how can I unblock asyncore.loop(), or at least be 
>able to interrupt it? To kill this server I need to hit CNTRL-C and 
>then attempt to GET an image from Firefox, Python then throws 
>KetboardInterrupt.

Why do you want to do that? (The usual reason is to have a place to 
do *other* things besides serving the channels). Anyway, you can use 
the count argument to asyncore.loop().
Ctrl-C gets recognised after the timeout expires; the default is 
30sec so you may have to wait up to 30 sec before the 
KeyboardInterrupt. You can lower it.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From bdesth.quelquechose at free.quelquepart.fr  Fri Jan  5 10:17:19 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 05 Jan 2007 16:17:19 +0100
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1167974907.497878.61070@i15g2000cwa.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<1167974907.497878.61070@i15g2000cwa.googlegroups.com>
Message-ID: <459e65ce$0$311$426a74cc@news.free.fr>

Carl Banks a ?crit :
> jeremito wrote:
> 
>>I am writing a class that is intended to be subclassed.  What is the
>>proper way to indicate that a sub class must override a method?
> 
> 
> You can't (easily).
> 
> If your subclass doesn't override a method, then you'll get a big fat
> AttributeError when someone tries to call it.

"override" implies that the method is already defined in one of the 
parent classes. So there's no reason for an AttributeError here...

(snip)


From harlinseritt at yahoo.com  Tue Jan 16 15:03:33 2007
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 16 Jan 2007 12:03:33 -0800
Subject: How to determine what exceptions a method might raise?
In-Reply-To: <12qq98ijkn5mld8@corp.supernews.com>
References: <12qq98ijkn5mld8@corp.supernews.com>
Message-ID: <1168977813.362594.160470@m58g2000cwm.googlegroups.com>

Hi Ed,

Generally checking the sources give a very good clue as to what
exceptions the interpreter can raise. Look around _builtins_ for this.

Harlin Seritt


Ed Jensen wrote:
> I'm really enjoying using the Python interactive interpreter to learn
> more about the language.  It's fantastic you can get method help right
> in there as well.  It saves a lot of time.
>
> With that in mind, is there an easy way in the interactive interpreter
> to determine which exceptions a method might raise?  For example, it
> would be handy if there was something I could do in the interactive
> interpreter to make it tell me what exceptions the file method might
> raise (such as IOError).
> 
> Thanks in advance.



From rridge at csclub.uwaterloo.ca  Mon Jan 22 16:56:01 2007
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 22 Jan 2007 13:56:01 -0800
Subject: mmap caching
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>
	<slrner7h27.d8g.nick@irishsea.home.craig-wood.com>
	<1169415139.515834.233700@a75g2000cwd.googlegroups.com>
	<4X7th.13145$pQ3.5671@newsread4.news.pas.earthlink.net>
	<1169496803.518305.275750@s34g2000cwa.googlegroups.com>
Message-ID: <1169502961.034481.264830@11g2000cwr.googlegroups.com>

George Sakkis wrote:
> It's around 400MB.

On Windows you may not be able to map a file of this size into memory
because of virtual address space fragmentation.  A Win32 process has
only 2G of virtual address space, and DLLs tend to get scattered
through out that address space.

> As I said, I cannot reproduce the MemoryError
> locally since I have 1GB physical space but IIRC the user who reported
> it had less.

Virtual address space fragmentation isn't affected by the amount of
physical memory in your system.  A system with 64MB of RAM might be
able to map a 400MB file while system with 3G of RAM might not be able
to map it because of how DLLs got loaded in to the process.

> Actually I am less concerned about whether a MemoryError
> is raised or not in this case and more about the fact that even if
> there's no exception, the program may suffer from severe thrashing due
> to constant swapping.

Well, that's what you're asking for when you use mmap.  The same
mechanism that creates virtual memory using a swap file is used to
create a virtual memory mapping of your file.  When you read from the
mmap file pages from the file a swapped into memory and stay in memory
until they need to be swapped out to make room for something else.  If
you don't want this behaviour, don't use mmap.

                                    Ross Ridge



From fredrik at pythonware.com  Wed Jan  3 09:43:13 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 3 Jan 2007 15:43:13 +0100
Subject: a question on python dict
References: <1166684796.856425.235810@i12g2000cwa.googlegroups.com><mailman.1896.1166685873.32031.python-list@python.org><en7oag$6oq$1@lust.ihug.co.nz><Xns98AA23C49C0F0tim111one@216.196.97.136><en85ir$uc3$2@lust.ihug.co.nz>
	<Xns98AA4BE8CF35Ctim111one@216.196.97.136>
Message-ID: <engfe1$i39$1@sea.gmane.org>

Tim Peters wrote:

> Taking my response out of context to begin with doesn't really change that
> I answered the question he asked ;-)

welcome to comp.lang.python.

</F> 





From jstroud at mbi.ucla.edu  Mon Jan 29 07:01:37 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 29 Jan 2007 04:01:37 -0800
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
Message-ID: <ellvh.240$o61.115@newssvr19.news.prodigy.net>

NoName wrote:
> Perl:
> @char=("A".."Z","a".."z",0..9);
> do{print join("", at char[map{rand @char}(1..8)])}while(<>);
> 
> !!generate passwords untill U press ctrl-z
> 
> 
> 
> Python (from CookBook):
> 
> from random import choice
> import string
> print ''.join([choice(string.letters+string.digits) for i in 
> range(1,8)])
> 
> !!generate password once :(

Make a loop.

> who can write this smaller

I won't write it for you, but I'll tell you how:

Write a function for the whole loop and the password generator and from 
then on it will be a one-liner (as a function call).

 > or without 'import'?

Yes, make sure you do the import inside the function.

If you follow my advice, you will be able to get as many passwords as 
you want with one line (and no spaces, even!):

generate_passwords()

It also reads much clearer than the perl version, don't you think?

By the way, you can also make a script. Call it "genpass", then at the 
command prompt, it will be far less than one line:

     % genpass

Or, if you are using DOS/Windows:

     C:> genpass

A lot of systems don't have a standard command called "g", so then you 
can turn it into *ONE LETTER*!!! That beats the pants off perl!

     % g

Or, of course, for DOS:

     C:> g

Good luck!

James


From skip at pobox.com  Mon Jan 29 12:27:31 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 29 Jan 2007 11:27:31 -0600
Subject: Can I undecorate a function?
In-Reply-To: <slrnersb0v.mua.matt@mwilson.umlcoop.net>
References: <slrnersb0v.mua.matt@mwilson.umlcoop.net>
Message-ID: <17854.11907.74767.252147@montanaro.dyndns.org>

    Matt> In some instances I want to access just the function f, though,
    Matt> and catch the values before they've been decorated.

def f(x):
    return x * x

@as_string
def fs(x):
    return f(x)

Call the one you want.

Skip


From danielkleinad at gmail.com  Thu Jan 11 09:39:39 2007
From: danielkleinad at gmail.com (Daniel Klein)
Date: Thu, 11 Jan 2007 09:39:39 -0500
Subject: __init__ vs __new__
Message-ID: <7sicq25i3qbddgst5fdjhu5i7d1p8j5qg1@4ax.com>

I've have a program that is using both of the methods below (in
different classes of course) for initializing the class. The example
below shows a class with the 2 methods with one commented out.

class JsubroutineParameters(list):
    "Represents a list of arguments for external subroutine calls."
    # We only need to override methods which add objects to the list.

    def __init__(self, alist = []):
        for objekt in alist: _validateParameter(objekt)
        self.extend(alist)

    #def __new__(cls, alist = []):
    #    for objekt in alist: _validateParameter(objekt)
    #    return list.__new__(cls, alist)

I don't really notice any behavioral difference. Is there in fact any
difference in using one over the other? Performance? Side effects? ???

I am using Python version 2.5.

Thanks,
Daniel Klein


From bruno.desthuilliers at websiteburo.com  Wed Jan 17 11:41:59 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Wed, 17 Jan 2007 17:41:59 +0100
Subject: 2.3-2.5 what improved?
In-Reply-To: <1169040587.340057.11040@m58g2000cwm.googlegroups.com>
References: <mailman.2817.1169029744.32031.python-list@python.org>
	<eol0qn$kvj$1@news.albasani.net>
	<1169040587.340057.11040@m58g2000cwm.googlegroups.com>
Message-ID: <45ae51d7$0$4263$426a74cc@news.free.fr>

billie a ?crit :
> robert wrote
> 
>> Robin Becker wrote:
>>> A large cgi based web Python-2.3 application needs to be speed improved.
>>> experiments show the following under reasonable testing (these are 2
>>> second reportlab pdf productions)
>>>
>>> 1) 2.3 --> 2.5 improvement small 1-2%
>>> 2) cgi --> fcgi improvement medium 10-12%
>>>
>>> I sort of remember claims being made about 2.5 being 10% faster than
>>> 2.4/2.3 etc etc. Can anyone say where the speedups were? Presumably we
>>> have a lot of old cruft that could be improved in some way eg moving
>>> loops into comprehensions, using iterator methods etc. Are those sort of
>>> things what we should look at?
>> Python 2.5 became quite fat. For bare CGI the Python load/init
>> time eats all improvements. Smaller scripts even loose lot of speed.
>> I still like Python 2.3 for many other reasons for many
>> applications - especially for CGI's, on Windows, for deployable
>> apps, GUI's etc. because the fat coming with Python 2.4 is not
>> balanced by necessary goods - mostly just fancy things.
> 
> What do you mean? Fat of libraries or fat itself?
> I tought that 2.5 was faster than precedent versions! :-\
> 

It is. But it takes a bit more time to launch the interpreter. Which is 
barely noticiable in most cases, but can be start to be a problem with CGI.


From horpner at yahoo.com  Tue Jan  2 13:42:32 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 2 Jan 2007 19:42:32 +0100
Subject: DOS, UNIX and tabs
References: <1167243140.687557.93320@f1g2000cwa.googlegroups.com>
	<emugom$t37$01$1@news.t-online.com>
	<pan.2006.12.28.03.22.21.587236@REMOVEME.cybersource.com.au>
	<mailman.2143.1167453331.32031.python-list@python.org>
	<en5e18$l39$03$1@news.t-online.com>
	<mailman.2163.1167518010.32031.python-list@python.org>
	<pan.2006.12.31.10.44.59.201060@gmx.net>
	<rolgp212fd1cshs8404v3c039he6hs4tvj@4ax.com>
	<en9v4k$4sg$2@lust.ihug.co.nz>
	<kcmip2dt5h9s2r9p4unrei8ehcutj2kuu5@4ax.com>
	<mailman.2217.1167758511.32031.python-list@python.org>
Message-ID: <slrnepla0e.1qo.horpner@FIAD06.norwich.edu>

On 2007-01-02, Peter Decker <pydecker at gmail.com> wrote:
> On 1/1/07, Tom Plunket <tomas at fancy.org> wrote:
>> Maybe I'm also weird, but I use a variable-pitch font when
>> programming in Python.  So a "tab equals some number of
>> spaces" really isn't useful to me.  My setup is, "tab equals
>> this much space".
>
> A year ago I would have thought you were weird, but after
> reading a post by Ed Leafe, one of the creators of Dabo about
> using proportional fonts for readability, I thought I'd try it
> out, thinking that it was pretty wacky. Turns out that after a
> very brief adjustment period, I liked it! I've been using
> proportional fonts ever since, and have found only one
> drawback: code that is indented with spaces looks butt-ugly.
> I'm glad I switched to tabs for my code.

I first came accross it in Stroustrup's _The C++ Programming
Language_. I liked the look and the idea immediately, but my
editor of choice (by historical accident) Vim, doesn't yet
support it.

-- 
Neil Cerutti
I've had a wonderful evening, but this wasn't it. --Groucho Marx


From bignose+hates-spam at benfinney.id.au  Tue Jan 16 17:11:21 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 17 Jan 2007 09:11:21 +1100
Subject: Conflicting needs for __init__ method
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<mailman.2741.1168898073.32031.python-list@python.org>
	<pan.2007.01.16.03.02.03.4711@REMOVEME.cybersource.com.au>
	<740c3aec0701160837r33340866w5ddef3e09a0de537@mail.gmail.com>
Message-ID: <873b6abp12.fsf@benfinney.id.au>

"BJ?rn Lindqvist" <bjourne at gmail.com> writes:

> import rational
> rational.rational(45)
> rational.rational(45.0)
> rational.rational([45, 45.5])
>
> def rational(obj):
>     initers = [(int, from_int), (basestring, from_str), (list, from_list)]
>     for obj_type, initer in initers:
>         if isinstance(obj, obj_type):
>             return initer(obj)
>     raise ValueError("Can not create a rational from a %r" % type(obj).__name__)

You've just broken polymorphism. I can't use your factory function
with an instance of my custom type that behaves like a list, but is
not derived from list (or a non-'int' int, or a non-'basestring'
string).

Use the supplied value as you expect to be able to use it, and catch
the exception (somewhere) if it doesn't work. That will allow *any*
type that exhibits the correct behaviour, without needlessly
restricting it to a particular inheritance.

-- 
 \      "This sentence contradicts itself -- no actually it doesn't."  |
  `\                                             -- Douglas Hofstadter |
_o__)                                                                  |
Ben Finney



From steve at REMOVE.THIS.cybersource.com.au  Thu Jan 18 07:44:38 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 18 Jan 2007 23:44:38 +1100
Subject: classes: need for an explanation
References: <1169121502.779509.138890@m58g2000cwm.googlegroups.com>
Message-ID: <pan.2007.01.18.12.44.38.64786@REMOVE.THIS.cybersource.com.au>

On Thu, 18 Jan 2007 03:58:22 -0800, 0k- wrote:

> hello!
> 
> i started to write a game in python in which i want to implement
> "dynamically attachable" attributes.

All attributes in Python are dynamically attachable.

>>> class Parrot:
...     pass
...
>>> p = Parrot()
>>> hasattr(p, "plumage")
False
>>> p.plumage = "beautiful red"
>>> p.plumage
'beautiful red'


[snip]

> class Thing(object):
>     props = {}
>     def __init__(self):
>         self.props["text"] = TxtAttr("something important")
> 
> t1 = Thing()
> t2 = Thing()
> 
> t2.props["text"].value = "another string"


Have you considered a simpler class like this?

class Thing(object):
    def __init__(self, value="something important"):
        self.text = TxtAttr(value)

t2 = Thing("another string")

Then, instead of writing t2.props["text"].value (four lookups) you would
just write t2.text (two lookups).



-- 
Steve.



From yankeeinexile at gmail.com  Tue Jan  9 12:10:38 2007
From: yankeeinexile at gmail.com (Lawrence Statton XE2/N1GAK)
Date: 09 Jan 2007 11:10:38 -0600
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
	<sfop5f7iqbcn$.fbeygwxvfsx0.dlg@40tude.net>
Message-ID: <87mz4s9ldd.fsf@gmail.com>

zoara <me17 at privacy.net> writes:
Link NOT removed to encourage more abuse ... 

> >  http://www.octabox.com/productivity_poll.php

I somehow missed this the first time.

Thanks for the pointer -- I gave them some nice PDP-10 related
responses.   I truly hope to have my TOPS-20 productivity improved
soon, thanks to these people.

-- 
	Lawrence Statton - lawrenabae at abaluon.abaom s/aba/c/g
Computer  software  consists of  only  two  components: ones  and
zeros, in roughly equal proportions.   All that is required is to
sort them into the correct order.


From oliphant.travis at ieee.org  Thu Jan 25 00:35:58 2007
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Wed, 24 Jan 2007 22:35:58 -0700
Subject: numpy or _numpy or Numeric?
In-Reply-To: <ep74qh$3td$1@news.kreonet.re.kr>
References: <ep71iq$26m$1@news.kreonet.re.kr>	<mailman.3062.1169625439.32031.python-list@python.org>
	<ep74qh$3td$1@news.kreonet.re.kr>
Message-ID: <ep9f9q$phs$1@sea.gmane.org>

auditory wrote:
>>> While trying to install numpy accroding to its homepage.
>>> (http://numpy.scipy.org/numpydoc/numdoc.htm).
>>> i am quite confused.
>> You are reading old documentation for Numeric and so any installation 
>> description is how to install the Numeric module (not its newer 
>> replacement which is called NumPy).
> 
> I found the above website from googling with "numpy" keyword,
> and supprised at that the top matching page is old one.
> 

The website is not the old one.  http://numpy.scipy.org is correct.

But, the documentation is old.  But, it is still useful (except for 
Numeric specific information like how to install it).  Therefore we 
still make a link to it.

-Travis



From pydecker at gmail.com  Tue Jan 23 17:54:30 2007
From: pydecker at gmail.com (Peter Decker)
Date: Tue, 23 Jan 2007 17:54:30 -0500
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <ep60jp$63v$1@aioe.org>
References: <ep60jp$63v$1@aioe.org>
Message-ID: <ca55a9900701231454o6e3409f2n5e7859e5e11dea81@mail.gmail.com>

On 1/23/07, Daniel Jonsson <not at set.se> wrote:
> So, I've reached the point where my building pipeline tools actually
> needs to be used by other people in my company. By this reason I
> actually need to think about the usability, and I've come to the
> conclusion that I need a GUI. So, which of the two packages should I
> learn, and which one is easier to pick up?
> Thanks in advance!

I strongly prefer the look and feel of wxPython, but I have to write
apps that run on Windows and Linux, and wxPython looks great on both.

If you do go with wxPython, I'd strongly recommend using the Dabo
framework, as they wrap the raw and somewhat ugly wxPython code
(inherited from its C++ roots) into something much more Pythonic and
consistent. Apps that took me all day in wxPython take me a couple of
hours using the dabo.ui module.

-- 

# p.d.


From david.bear at asu.edu  Mon Jan 29 15:31:55 2007
From: david.bear at asu.edu (David Bear)
Date: Mon, 29 Jan 2007 13:31:55 -0700
Subject: python 2.3 module ref
Message-ID: <6178735.qJi6sMvOM0@teancum>

Since redhat packages python2.3 with their distro (RHEL 4..) I was looking
for a module reference for that version. Looking at python.org I only see
current documentation.

any pointers to a 2.3 module ref?
-- 
David Bear
-- let me buy your intellectual property, I want to own your thoughts --


From rzantow at gmail.com  Mon Jan 22 15:08:25 2007
From: rzantow at gmail.com (rzed)
Date: Mon, 22 Jan 2007 15:08:25 -0500
Subject: Are there sprintf in Python???
References: <1169496238.925052.311660@l53g2000cwa.googlegroups.com>
Message-ID: <Xns98C09A068F716rzantowgmailcom@208.49.80.253>

"questions?" <universal_used at hotmail.com> wrote in
news:1169496238.925052.311660 at l53g2000cwa.googlegroups.com: 

> Are there any sprintf in Python?
> I know you can print to files(or redefine sys.stout) and later
> open the file content.
> 
> Are there similar function to sprintf in C?

Something like this?

x = 9
vbl = "One digit: %d, four digits: %04d" % (x,x)
print vbl


From pavlovevidence at gmail.com  Wed Jan 31 15:24:21 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 31 Jan 2007 12:24:21 -0800
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <1170271023.955808.314010@q2g2000cwa.googlegroups.com>
References: <1170260637.679856.39920@k78g2000cwa.googlegroups.com>
	<1170271023.955808.314010@q2g2000cwa.googlegroups.com>
Message-ID: <1170275061.786779.74910@a34g2000cwb.googlegroups.com>

Michele Simionato wrote:
> On Jan 31, 5:23 pm, "Frank Potter" <could.... at gmail.com> wrote:
> > I want to find a multithreaded downloading lib in python,
> > can someone recommend one for me, please?
> > Thanks~
>
> Why do you want to use threads for that? Twisted is the
> obvious solution for your problem,

Overkill?  Just to download a few web pages?  You've got to be
kidding.

> but you may use any
> asynchronous framework, as for instance the good ol
> Tkinter:

Well, of all the things you can use threads for, this is probably the
simplest, so I don't see any reason to prefer asynchronous method
unless you're used to it.  One Queue for dispatching should be enough
to synchronize everything; maybe a Queue or simple lock at end as well
depending on the need.

The OP might not even care whether it's threaded or asynchronous.


Carl Banks



From chris.cavalaria at free.fr  Wed Jan 31 05:33:39 2007
From: chris.cavalaria at free.fr (Christophe)
Date: Wed, 31 Jan 2007 11:33:39 +0100
Subject: Help me understand this
In-Reply-To: <jTGvh.39800$Gr2.6608@newssvr21.news.prodigy.net>
References: <1170140737.027139.14920@h3g2000cwc.googlegroups.com>
	<pan.2007.01.30.07.47.33.15637@REMOVEME.cybersource.com.au>
	<1170146755.446429.90720@v45g2000cwv.googlegroups.com>
	<jTGvh.39800$Gr2.6608@newssvr21.news.prodigy.net>
Message-ID: <45c0708d$0$26734$426a74cc@news.free.fr>

James Stroud a ?crit :
> Beej wrote:
>>>>> (2).__add__(1)
> 
> Nice. I would have never thought to put parentheses around an integer to 
> get at its attributes.
> 
> James

You can also do it like that :

 >>> 2 .__add__(1)
3


From heikki at osafoundation.org  Thu Jan 11 18:29:05 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Thu, 11 Jan 2007 15:29:05 -0800
Subject: Wierd M2Crypto bug - phony "peer did not return certificate" error
In-Reply-To: <1168543799.097737.127930@i56g2000hsf.googlegroups.com>
References: <YK%oh.17173$sR.6972@newssvr29.news.prodigy.net>
	<ovWdnZTGuYL38jjYnZ2dnUVZ_rqdnZ2d@comcast.com>
	<1168543799.097737.127930@i56g2000hsf.googlegroups.com>
Message-ID: <ZsednYtgeIfeVTvYnZ2dnUVZ_hydnZ2d@comcast.com>

nagle at animats.com wrote:
>   That's a problem for me.  I need short timeouts; I'm accessing sites
> that might or might not have SSL support, and I need to quickly time
> out when there's no SSL server.

You should be able to do short timeouts, just not using the global
setdefaulttimeout. Have you tried Connection.set_socket_read/write_timeout?

Also like I mentioned before, if you use the Twisted wrapper and let
Twisted handle network stuff you should be fine.

>   Python needs a merge here. Read Guido van Rossum's rant on M2Crypto:
> 
>       http://www.artima.com/weblogs/viewpost.jsp?thread=95863

That's old news, I believe I have fixed all of the issues mentioned
there already in the 0.16 release.

> What's probably needed is to implement the additional API functions of
> the M2Crypto wrapper in the PyOpenSSL wrapper, so that the M2Crypto
> components written in Python could be used with it. Then we'd have one
> good implementation instead of two broken ones.

M2Crypto and pyOpenSSL (and pyOpenSSL-extended, which you might want to
take a look at as well) are implemented pretty differently, so merging
seems unlikely. They are pretty small code wise, though, so it is not an
impossible task.

Personally I think I'd prefer if Python stdlib contained a better SSL
module that did at least all the checks required for safe SSL
connection. (Yeah, yeah, maybe I need to write it myself if nobody else
gets to it;)

-- 
  Heikki Toivonen


From bj_666 at gmx.net  Sun Jan  7 12:21:42 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 07 Jan 2007 18:21:42 +0100
Subject: low level python read's
References: <1168184689.924811.305290@42g2000cwt.googlegroups.com>
Message-ID: <pan.2007.01.07.17.21.42.783087@gmx.net>

In <1168184689.924811.305290 at 42g2000cwt.googlegroups.com>, gz wrote:

> So how do i stop python from trying to be smart and just read *at most*
> 1000 chars and let it go if he(it?*) reads less?

For low level file stuff use the functions in the `os` module, i.e.
`os.read()`.

> p.s *is python a "he" or an "it"?

I'd say "it".

Ciao,
	Marc 'BlackJack' Rintsch



From Thomas.Ploch at gmx.net  Sun Jan  7 16:57:44 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sun, 07 Jan 2007 22:57:44 +0100
Subject: how to find the longst element list of lists
In-Reply-To: <Vwdoh.223$L06.180@nntpserver.swip.net>
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
Message-ID: <45A16CD8.5070006@gmx.net>

Michael M. schrieb:
> How to find the longst element list of lists?
> 
> I think, there should be an easier way then this:
> 
>    s1 = ["q", "e", "d"]
>    s2 = ["a", "b"]
>    s3 = ["a", "b", "c", "d"]
> 
>    if len(s1) >= len(s2) and len(s1) >= len(s3):
>      sx1=s1  ## s1 ist l?ngster
>      if len(s2) >= len(s3):
>        sx2=s2
>        sx3=s3
>      else:
>        sx2=s3
>        sx3=s2
> 
>    if len(s2) >= len(s3) and len(s2) >= len(s1):
>      sx1=s2  ## s2 ist l?ngster
>      if len(s3) >= len(s1):
>        sx2=s3
>        sx3=s1
>      else:
>        sx2=s1
>        sx3=s3
> 
>    if len(s3) >= len(s1) and len(s3) >= len(s2):
>      sx1=s3  ## s3 ist l?ngster
>      if len(s1) >= len(s2):
>        sx2=s1
>        sx3=s2
>      else:
>        sx2=s2
>        sx3=s1
> 
> After, the list ist sorted:
> 
>    sx1 = ["a", "b", "c", "d"]
>    sx2 = ["q", "e", "d"]
>    sx3 = ["a", "b"]
> 

I don't really get that. You have three lists, you want to sort them
after their length. You should put them into one list.
I think you should rather implement this as:

 >>> list = [a1, s2, s3]
 >>> list.sort(lambda x,y: cmp(len(y), len(x)))
 >>> list
 [['a', 'b', 'c', 'd'], ['q', 'e', 'd'], ['a', 'b']]

Thomas


From rzantow at gmail.com  Wed Jan  3 09:46:49 2007
From: rzantow at gmail.com (rzed)
Date: Wed, 03 Jan 2007 09:46:49 -0500
Subject: function without brackets ?
References: <57668$459bbf95$d443bb3a$16218@news.speedlinq.nl>
Message-ID: <Xns98AD637EEE29Brzantowgmailcom@208.49.80.253>

Stef Mientki <S.Mientki-nospam at mailbox.kun.nl> wrote in news:57668
$459bbf95$d443bb3a$16218 at news.speedlinq.nl:

> If I call a parameterless function without brackets at the end,
> the function is not performed, but ...
> I don't get an error message ???
> 
> Is this normal  behavior ?
> 

Yes, it's normal, but you did not in fact call the function, if you 
were using Python. Functions are objects that, for example, can be 
passed to other functions. The way to refer to the functions 
themselves is to omit the arguments and parentheses. So by simply 
stating the name of a function, that's all you've done. 

-- 
rzed


From homeyland at ghetonews.com  Tue Jan 16 22:25:56 2007
From: homeyland at ghetonews.com (Kelvin)
Date: Wed, 17 Jan 2007 03:25:56 GMT
Subject: Acc#2049850557 Activation Code Please
Message-ID: <8Hgrh.671126$1T2.630559@pd7urf2no>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070117/6c4beeff/attachment.html>

From researchbase at gmail.com  Sat Jan 20 14:06:43 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Sun, 21 Jan 2007 00:36:43 +0530
Subject: confused on python rpc with apache, is it possible?
In-Reply-To: <51etfpF1kappuU1@mid.uni-berlin.de>
References: <mailman.2912.1169227938.32031.python-list@python.org>
	<51ce8uF1k0tl5U1@mid.uni-berlin.de>
	<mailman.2931.1169273350.32031.python-list@python.org>
	<1169276359.477277.17930@q2g2000cwa.googlegroups.com>
	<mailman.2945.1169309537.32031.python-list@python.org>
	<51etfpF1kappuU1@mid.uni-berlin.de>
Message-ID: <f81479dd0701201106q7b562d8cw7df8814611ae37f3@mail.gmail.com>

On 20/01/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
>
> There is nothing an apache will do for you - except from possibly
> proxing python.
>
> Go read up upon xmlrpc and python, possibly doing it with twisted, but
> there are other options.
>
> Don't bother with the apache.

well in that case I don't need apache.
can I do xml-rpc using the default libraries that come with every
python installer?
is there some added advantage of using twisted?
Krishnakant.


From gagsl-py at yahoo.com.ar  Wed Jan  3 19:35:49 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 03 Jan 2007 21:35:49 -0300
Subject: static object
In-Reply-To: <459c306c$0$314$426a74cc@news.free.fr>
References: <459c306c$0$314$426a74cc@news.free.fr>
Message-ID: <7.0.1.0.0.20070103212056.0566f190@yahoo.com.ar>

At Wednesday 3/1/2007 19:38, meelab wrote:

>I am looking for a way to create a "static object" or a "static class" -
>terms might be inappropriate - having for instance:
>
>class StaticClass:
>     .
>     .
>
>and then
>staticObject1 = StaticClass()
>staticObject2 = StaticClass()
>
>so that staticObject1 and staticObject2 refers exactly to the same
>instance of object.

This is usually known as a Singleton.
If you only want it to store values, or use "normal" methods, the 
most direct way is a simple module - modules are already singletons in Python.
If you want to include properties, descriptors, and such, look for 
the Singleton (or Borg) pattern in the Python Cookbook: 
http://aspn.activestate.com/ASPN/Cookbook/Python/


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From paul at boddie.org.uk  Mon Jan 22 13:22:20 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 22 Jan 2007 10:22:20 -0800
Subject: Is there a better way to implement this:
References: <ep2o5c$1aa$1@online.de>
	<mailman.2989.1169484766.32031.python-list@python.org>
Message-ID: <1169490140.401270.226830@l53g2000cwa.googlegroups.com>

Michael Yanowitz wrote:
>
>    I guess I am looking for something portable (both
> Windows and Linux) where I can abort a function after
> a certain time limit expires.

Doing a search for "timeout function Python" on Google reveals a number
of approaches.

Using signals:

  * http://nick.vargish.org/clues/python-tricks.html
  * http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/307871

Using threads:

  * http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/473878

Using processes:

  * http://lfw.org/python/delegate.html

Paul



From bdesth.quelquechose at free.quelquepart.fr  Sun Jan  7 15:53:52 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 07 Jan 2007 21:53:52 +0100
Subject: where is python on linux?
In-Reply-To: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
References: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
Message-ID: <45a157a0$0$289$426a74cc@news.free.fr>

Frank Potter a ?crit :
> I installed fedora core 6 and it has python installed.
> But the question is, where is the executable python file?
> I can't find it so I come here for help.

man which



From m.sloyko at gmail.com  Wed Jan 24 08:04:38 2007
From: m.sloyko at gmail.com (Maxim Sloyko)
Date: 24 Jan 2007 05:04:38 -0800
Subject: Thoughts on using isinstance
In-Reply-To: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
Message-ID: <1169643877.156673.207550@k78g2000cwa.googlegroups.com>



On Jan 24, 3:38 pm, "abcd" <codecr... at gmail.com> wrote:
> In my code I am debating whether or not to validate the types of data
> being passed to my functions.  For example
>
> def sayHello(self, name):
>     if not name:
>         rasie "name can't be null"
>     if not isinstance(name, str):
>         raise "name must be a string"
>     print "Hello " + name
>
> Is the use of isinstance a "bad" way of doing things?  is it a "heavy"
> operation?  for example, if I use this in each function validate input
> will it slow things down a lot?
>
> just curious how you might handle this type of situation (other than
> not validating at all).
>
> thanks

My opinion is that validation is generally good.  However, you have to
make it not too strict.
For example, instead of

print "Hello " + name

you could have written

print "Hello " + str(name)

In this case requirement isinstance() will be too strict. The only
thing you have to check is that hasattr(name, "__str__")  and
callable(name.__str__)

In this case you can have validation, while at the same time enjoy full
flexibility of dynamic typing.

--
Maxim



From deets at nospam.web.de  Mon Jan 29 02:51:13 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 29 Jan 2007 08:51:13 +0100
Subject: Data structure and algorithms
In-Reply-To: <1170027873.650783.172500@l53g2000cwa.googlegroups.com>
References: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
	<1170025297.838143.191740@j27g2000cwj.googlegroups.com>
	<mailman.3249.1170026297.32031.python-list@python.org>
	<1170027873.650783.172500@l53g2000cwa.googlegroups.com>
Message-ID: <525nccF1motuaU1@mid.uni-berlin.de>

azrael schrieb:
> i'd like to get more control like in c with pointers. I want to loose 
> the data after disabling:
> 
>>>> list=[]
>>>> list.append(Node(1))
>>>> list.append(Node(2))
>>>> list[0].next=list[1]
> 
> 
>       1, 2
> 
> 
>>>> list.append(Node(3))
>>>> list[1].next=list[2]
> 
> 
> 1,2,3
> 
> 
>>>> list[0].next=list[2]
> 
> 1,3                       (but 2 still exists as list[2])

So what? Then do

del list[2]


This is what happens in C also - if you store references to structures, 
they don't magically go away just because you refer to them from other 
places.


Diez


From robert.kern at gmail.com  Thu Jan 11 13:08:00 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 11 Jan 2007 12:08:00 -0600
Subject: Frequency spectrum with fft of a real valued array...?
In-Reply-To: <op.tlzy9djzu6qnye@krings>
References: <op.tlzy9djzu6qnye@krings>
Message-ID: <eo5ue7$dvq$1@sea.gmane.org>

Holger wrote:

> What does it mean to me? How do I get to the wanted frequenca spectrum???

It's packed in the conventional FFT format. Here is a function in numpy (the
successor to Numeric, which I assume that you are using) that generates the
corresponding frequencies in the same packed format:

In [324]: import numpy

In [325]: numpy.fft.fftfreq?
Type:           function
Base Class:     <type 'function'>
Namespace:      Interactive
File:
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/numpy-1.0.2.dev3507-py2.5-macosx-10.4-i386.egg/numpy/fft/helper.py
Definition:     numpy.fft.fftfreq(n, d=1.0)
Docstring:
    fftfreq(n, d=1.0) -> f

    DFT sample frequencies

    The returned float array contains the frequency bins in
    cycles/unit (with zero at the start) given a window length n and a
    sample spacing d:

      f = [0,1,...,n/2-1,-n/2,...,-1]/(d*n)         if n is even
      f = [0,1,...,(n-1)/2,-(n-1)/2,...,-1]/(d*n)   if n is odd


-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From mkeller.dci at gmail.com  Wed Jan 24 22:20:33 2007
From: mkeller.dci at gmail.com (mukappa)
Date: 24 Jan 2007 19:20:33 -0800
Subject: Subclassing cElementTree.XMLTreeBuilder
Message-ID: <1169695233.737016.95950@a75g2000cwd.googlegroups.com>

I found an earlier post about subclassing cElementTree.Element which
can't
be done because it is a factory method.  I am trying to subclass
XMLTreeBuilder
with success using the python implementation, but not with
cElementTree.

[1013]$ python
Python 2.3.4 (#1, Feb 22 2005, 04:09:37)
[GCC 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import elementtree.ElementTree
>>> class X(elementtree.ElementTree.XMLTreeBuilder):
...     pass
...
>>> import cElementTree
>>> class Y(cElementTree.XMLTreeBuilder):
...     pass
...
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: cannot create 'builtin_function_or_method' instances
>>>

Is it possible to subclass cElementTree.XMLTreeBuilder?

Thanks,
Mike



From ghirai at ghirai.com  Sun Jan  7 09:19:11 2007
From: ghirai at ghirai.com (Ghirai)
Date: Sun, 7 Jan 2007 16:19:11 +0200
Subject: Manually installing PIL
Message-ID: <771449155.20070107161911@ghirai.com>

Hello,

My host doesn't have PIL installed, and from
what i can tell, they won't install it.

Is there any way i can copy the needed files
near my python script?

I'm using Image, ImageFont, ImageDraw and ImageFilter.

Thanks.

-- 
Best regards,
Ghirai.



From http  Sun Jan  7 05:01:44 2007
From: http (Paul Rubin)
Date: 07 Jan 2007 02:01:44 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
Message-ID: <7x7ivz88af.fsf@ruckus.brouhaha.com>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:
> 	__ (two leading underscores) results in name-mangling. This /may/ be
> used to specify "private" data, but is really more useful when one is
> designing with multiple super classes:

Trouble with this is you can have two classes with the same name,
perhaps because they were defined in different modules, and then the
name mangling fails to tell them apart.


From exarkun at divmod.com  Wed Jan 31 20:10:29 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 31 Jan 2007 20:10:29 -0500
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <45C122B7.6000701@mvista.com>
Message-ID: <20070201011029.25807.1696981903.divmod.quotient.5293@ohm>

On Wed, 31 Jan 2007 15:13:59 -0800, "Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote:
>Jean-Paul Calderone wrote:
>> [snip]
>>>
>>>
>>
>> You're right.  Learning new things is bad.  My mistake.
>>
>> Jean-Paul
>>
>That isn't what I said at all.  You have to look at it from a
>cost/benefit relationship.  Its a waste of time/money to learn something
>complex to do something simple.  For the simple things, use a simple
>solution.  KISS.  When he has an application that would require
>something more complex, it would be at that point he should consider
>using it for a project.  Unless the OP has a desire to learn this
>technology, then more power to him.  I, however, do not believe that
>would be the best approach for a simple problem.
>
>Knowing the appropriate tool for the job is a trait of an good engineer.
>

You are assuming that he already knows how to use threads, and so there
is no investment required for a threaded solution.  In my experience, it's
much safer to assume the opposite.  _Even_ (often _especially_ when a
threaded solution is explicitly requested.

Jean-Paul


From michele.simionato at gmail.com  Sun Jan 14 03:35:27 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 14 Jan 2007 00:35:27 -0800
Subject: Decorators inside of class and decorator parameters
In-Reply-To: <mailman.2703.1168747644.32031.python-list@python.org>
References: <1168728983.541526.202320@l53g2000cwa.googlegroups.com>
	<mailman.2703.1168747644.32031.python-list@python.org>
Message-ID: <1168763727.677028.149640@51g2000cwl.googlegroups.com>

Gabriel Genellina wrote:
> see this article by M. Simoniato
> http://www.phyast.pitt.edu/~micheles/python/documentation.html for a better
> way using its decorator factory.

Actually the name is Simionato ;)
I have just released version 2.0, the new thing is an update_wrapper
function similar to the one
in the standard library, but with the ability to preserve the signature
on demand. For instance

def traced(func):
   def wrapper(*args, **kw):
       print 'calling %s with args %s, %s' % (func, args, kw)
       return func(*args, **kw)
  return update_wrapper(wrapper, func, create=False)

works exactly as functools.update_wrapper (i.e. copies__doc__,
__module__,etc. from func to wrapper without
preserving the signature), whereas update_wrapper(wrapper, func,
create=True) creates a new wrapper
with the right signature before copying the attributes.

 Michele Simionato



From vinay_sajip at yahoo.co.uk  Tue Jan  9 05:07:39 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: 9 Jan 2007 02:07:39 -0800
Subject: line duplication using logging to file
References: <1168329975.491514.282000@11g2000cwr.googlegroups.com>
Message-ID: <1168337259.283886.307050@s34g2000cwa.googlegroups.com>

seb wrote:

> Hi, I am writing to a file some basic information using the logging
> module.  It is working but in the log file some line are printed
> several time. I had put some print debugging messages in the logging
> function (so they appear on the consile) and they are called once only.
> Obviously there is some understantding of the logging module that I am
> missing.
>
> My simple logging program (see below) is called by several processes.
> In this way I can collect the information from various sources (and not
> use the network enabled logging module)
>
> I am using python 2.4 on WinXP SP2.
>
> Do you have any idea ? Thanks in advance.
>

I copied your two scripts into "appel_main.py" and "appel_log.py" and
when I run, I get a single line in main_log.txt:

2007-01-09 10:01:42,766 -  INFO -C:\temp\appel_main.py___?something

On the console is printed:

time.asctime() Tue Jan 09 10:04:25 2007 received level= info message=
C:\temp\appel_main.py___?something
logger info
_________ C:\temp\appel_main.py___?something

I didn't see any repetitions. Perhaps it's to do with multiple
processes in your environment?

If you call write_log several times you will add a handler several
times - this is not a normal pattern of use. You should separate setup
of Loggers/Handlers/Formatters from actually logging events via
debug(), info() etc.

Best regards,

Vinay Sajip



From bignose+hates-spam at benfinney.id.au  Tue Jan 16 17:04:29 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 17 Jan 2007 09:04:29 +1100
Subject: Projects anyone?
References: <1168949268.618793.102890@l53g2000cwa.googlegroups.com>
Message-ID: <877ivmbpci.fsf@benfinney.id.au>

"placid" <Bulkan at gmail.com> writes:

> I'm looking for anyone who is working on a project at the moment that
> needs help (volunteer).

The Volunteer Opportunities page is a bit thin at the moment. I'd hope
people can respond to this thread and update that page with other
projects that need help.

    <URL:http://wiki.python.org/moin/VolunteerOpportunities>

The Coding Project Ideas page is more specifically focussed on getting
programmer help.

    <URL:http://wiki.python.org/moin/CodingProjectIdeas>

Browse the Cheese Shop for packages that you'd like to improve, and
offer your help to the project maintainer.

    <URL:http://cheeseshop.python.org/pypi/>

-- 
 \       "A 'No' uttered from deepest conviction is better and greater |
  `\       than a 'Yes' merely uttered to please, or what is worse, to |
_o__)                               avoid trouble."  -- Mahatma Gandhi |
Ben Finney



From alain.walter at thalesgroup.com  Tue Jan 30 05:07:14 2007
From: alain.walter at thalesgroup.com (awalter1)
Date: 30 Jan 2007 02:07:14 -0800
Subject: thread and processes with python/GTK
Message-ID: <1170151634.019690.320310@k78g2000cwa.googlegroups.com>

Hello,

I'm developping an application with python, pyGTK and GTK+.
I've performed many tests by using methods as Popen, popen2, 
os.system ... to communicate with Unix (HPUX),
The last attempt is this code written in a thread :
	    fin,fout = popen2.popen2('ps -def')
	    line = fin.readline()
	    while 1 :
	    	if not line : break
	    	print "line=",line
	   	line = fin.readline()
	    fin.close()
In that case, lines are printed only when I exit my application.
Usually the behavior is not as expected and I cannot understand why. I 
am wondering that it could be a constraint from the use of GTK 
(mainloop() existence ???).
Is somebody aware about conflict between GTK use and unix mechanism.

Thanks for you help



From wolfgang.grafen at marconi.com  Mon Jan 22 13:19:05 2007
From: wolfgang.grafen at marconi.com (Wolfgang Grafen)
Date: Mon, 22 Jan 2007 19:19:05 +0100
Subject: Program eating memory, but only on one machine?
In-Reply-To: <mailman.2988.1169481320.32031.python-list@python.org>
References: <mailman.2986.1169473883.32031.python-list@python.org>	<c11f84-oo5.ln1@darkstargames.dnsalias.net>
	<mailman.2988.1169481320.32031.python-list@python.org>
Message-ID: <45B50019.7040509@marconi.com>

I had a similar problem with an extension module on Solaris years ago.
My problem at that time:
I requested memory and released it and requested more memory in the next step
and so on.

The reason that the memory was eaten up:
An answer out of this group was that the operating system doesn't release the
memory space because it assumes you will need it soon again. The memory will
only be released with the end of the process.

The solution was always to request memory for the largest array the process will
demand and it worked for me.

Regards

Wolfgang

Per B.Sederberg wrote:
> Wolfgang Draxinger <wdraxinger <at> darkstargames.de> writes:
>>> So, does anyone have any suggestions for how I can debug this
>>> problem?
>> Have a look at the version numbers of the GCC used. Probably
>> something in your C code fails if it interacts with GCC 3.x.x.
>> It's hardly Python eating memory, this is probably your C
>> module. GC won't help here, since then you must add this into
>> your C module.
>>
>>>  If my program ate up memory on all machines, then I would know
>>> where to start and would blame some horrible programming on my
>>> end. This just seems like a less straightforward problem.
>> GCC 3.x.x brings other runtime libs, than GCC 4.x.x, I would
>> check into that direction.
>>
> 
> Thank you for the suggestions.  Since my C module is such a small part of the
> simulations, I can just comment out the call to that module completely (though I
> am still loading it) and fill in what the results would have been with random
> values.  Sadly, the program still eats up memory on our cluster.
> 
> Still, it could be something related to compiling Python with the older GCC.
> 
> I'll see if I can make a really small example program that eats up memory on our
> cluster.  That way we'll have something easy to work with.
> 
> Thanks,
> Per
> 
> 
> 


From http  Sat Jan 13 02:28:06 2007
From: http (Paul Rubin)
Date: 12 Jan 2007 23:28:06 -0800
Subject: Boilerplate in rich comparison methods
References: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>
Message-ID: <7x8xg71j3t.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> class Parrot:
>     def __eq__(self, other):
>         return self.plumage() == other.plumage()
>     def __ne__(self, other):
>         return self.plumage() != other.plumage()
>     def __lt__(self, other):
>         return self.plumage() < other.plumage()
>     def __gt__(self, other):
>         return self.plumage() > other.plumage()
>     def __le__(self, other):
>         return self.plumage() <= other.plumage()
>     def __ge__(self, other):
>         return self.plumage() >= other.plumage()

If it's that uniform I think you can just use __cmp__:

 class Parrot:
    def __cmp__(self, other):
       return cmp(self.plumage(), other.plumage())

Did I miss something?  The idea of rich comparison is that the
different relations aren't so similar to each other, e.g. some kind of
partial ordering.

> If the comparison requires a lot of work, I'll do something like this:
> 
> class Aardvark:
>     def __le__(self, other):
>         return lots_of_work(self, other)
>     def __gt__(self, other):
>         return not self <= other
>     # etc.
> 
> But I can't help feeling that there is a better way. What do others do?

Same as above. 


From phil at riverbankcomputing.co.uk  Wed Jan 24 08:51:20 2007
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Wed, 24 Jan 2007 13:51:20 +0000
Subject: Missing .dlls when installing PyQt!? :(
In-Reply-To: <1169645779.368746.157750@l53g2000cwa.googlegroups.com>
References: <1169645779.368746.157750@l53g2000cwa.googlegroups.com>
Message-ID: <200701241351.20931.phil@riverbankcomputing.co.uk>

On Wednesday 24 January 2007 1:36 pm, wd.jonsson at gmail.com wrote:
> Hello!
>
> I must be doing something wrong here because I'm getting all these
> missing .dll messages after installing PyQT. This is what I've done (no
> step excluded):
>
> 1. Fresh installation of Python25
> 2. I run the PyQt-gpl-4.1.1-Py2.5-Qt4.2.2.exe file which should include
> SIP
> 3. I run the qt-win-opensource-4.2.2-mingw.exe file
> 4. I try to launch the C:\Program
> Files\PyQt4\examples\tools\qtdemo\qtdemo.pyw file
>
> Result:
> Error message says: Can't find mingwm10.dll
>
> After searching for the file I found it in the C:\Qt\4.2.2\bin
> directory. I copied the dll to the windows dir just to run in to the
> next missing dll error (QtCore4.dll) which is also located in the same
> directory. What have I missed? I've been trying to install QT for 6
> hours now...
>
> Gah, please help! :)

Make sure your PATH includes the directory containing the MinGW DLL.

Phil


From eric_brunel at despammed.com  Wed Jan 31 03:47:48 2007
From: eric_brunel at despammed.com (Eric Brunel)
Date: Wed, 31 Jan 2007 09:47:48 +0100
Subject: Resizing widgets in text windows
References: <1169847315.631951.295830@a75g2000cwd.googlegroups.com>
	<op.tmwp1letrqur0o@eb.pragmadev>
	<1170195187.058117.14830@q2g2000cwa.googlegroups.com>
Message-ID: <op.tm0f1yqyrqur0o@eb.pragmadev>

On Tue, 30 Jan 2007 23:13:07 +0100, <deacon.sweeney at gmail.com> wrote:
> I'm using a text widget to hold a set of plots, one plot per line,
> such that the scrolling capability of the text widget can be taken
> advantage of to display only a subset of the plots at any given time.
> In the analyses my program automates, there are at least several plots
> are typically loaded into the text widget. This works out splendidly,
> but the width of the plots has thus far been a static thing. Now, I'll
> be able to adjust the plots widths so that when the owner window is
> resized, the width of each plot in the text widget is adjusted and the
> plot continues to occupy the entire text widget but no more, making
> for a much more professional looking product.

IMHO, "abusing" the text widget to do that is quite likely to cause  
problems in the future. For this use case, I would have used a Canvas with  
scrollbars containing a Frame where the plots are packed or gridded  
vertically. The Canvas's scrollregion should then be adjusted each time a  
plot is added, removed or resized, and you'd still have to use the  
<Configure> event to resize the Frame to the Canvas's width. But at least,  
that's what Canvases and Frames are for; the Text widget is for... well,  
displaying text. Also note that Pmw (http://pmw.sourceforge.net/) has a  
ScrolledFrame megawidget that just does what you want.

> Muchas gracias.

You're welcome.

HTH again...
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From jweida at gmail.com  Wed Jan 24 23:40:27 2007
From: jweida at gmail.com (Jerry)
Date: 24 Jan 2007 20:40:27 -0800
Subject: newbie - returned values from cscript.exe
In-Reply-To: <1169666769.242698.70730@j27g2000cwj.googlegroups.com>
References: <1169666769.242698.70730@j27g2000cwj.googlegroups.com>
Message-ID: <1169700027.846610.234310@a75g2000cwd.googlegroups.com>

I would probably start with a look at popen.  With it you can make your
call to cscript and capture the output.  Then, you don't need to set
any environment variables.

On Jan 24, 1:26 pm, "Rich" <richfa... at gmail.com> wrote:
> I am writing my first python script and I'm guessing this is something
> obvious but I can't find any examples of doing something like this.  I
> have a python script that is running a vbscript through cscript.exe.
> The vbscript looks up a server name, username, password etc and returns
> these values in a delimited list using wscript.echo.  I can assign
> these values to variables using a Windows batch files with the
> following code
>
> FOR /F "tokens=1-6" %%a in ('cscript /nologo GetServerAccessInfo.vbs"')
> do (
>         SET DB_SERVER_NAME=%%a
>         SET DB_NAME=%%b
>         SET NMDBO_USERNAME=%%c
>         SET NMDBO_PASSWORD=%%d
>         SET SU_USERNAME=%%e
>         SET SU_PASSWORD=%%f
>
> I can't figure out how to do the same thing using a python script to
> call this instead of a batch file.
>
> I am running the vbscript by using the following command
> os.system('cscript /nologo GetServerAccessInfo.vbs')



From carsten at uniqsys.com  Tue Jan  9 08:40:28 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 09 Jan 2007 08:40:28 -0500
Subject: Maths error
In-Reply-To: <envur1$rq1$1@gemini.csx.cam.ac.uk>
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
	<envur1$rq1$1@gemini.csx.cam.ac.uk>
Message-ID: <1168350028.3722.3.camel@dot.uniqsys.com>

On Tue, 2007-01-09 at 11:38 +0000, Nick Maclaren wrote:
> |> Rory Campbell-Lange wrote:
> |> 
> |> > Is using the decimal module the best way around this? (I'm
> |> > expecting the first sum to match the second). It seem
> |> > anachronistic that decimal takes strings as input, though.
> 
> As Dan Bishop says, probably not.  The introduction to the decimal
> module makes exaggerated claims of accuracy, amounting to propaganda.
> It is numerically no better than binary, and has some advantages
> and some disadvantages.

Please elaborate. Which exaggerated claims are made, and how is decimal
no better than binary?

-Carsten




From __peter__ at web.de  Thu Jan  4 12:02:48 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 04 Jan 2007 18:02:48 +0100
Subject: Sorting on multiple values, some ascending, some descending
References: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
	<slrnepqajt.t4.horpner@FIAD06.norwich.edu>
Message-ID: <enjbso$aot$02$1@news.t-online.com>

Neil Cerutti wrote:

> Another trick is to factor the key application out of the sort.
> This may be a good idea if when you want to minimize the number
> of times your key function is called.
> 
> The idea is to mangle the list temporarily so you can use an
> unkeyed sort, and then unmangle the sorted data. Here's a silly
> example using a phone directory that's not stored in a format
> that's easy to sort.

No need to jump through these hoops; list.sort(key=keyfunc) calls keyfunc()
exactly once per list item:

>>> from random import shuffle
>>> items = range(-5, 10)
>>> shuffle(items)
>>> count = 0
>>> def key(value):
...     global count
...     count += 1
...     return abs(value)
...
>>> items.sort(key=key)
>>> count
15

Peter


From exarkun at divmod.com  Wed Jan 31 12:03:39 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 31 Jan 2007 12:03:39 -0500
Subject: What is the dummy statement that do nothing in Python?
In-Reply-To: <epqhre$qtp$1@netnews.upenn.edu>
Message-ID: <20070131170339.25807.1722520908.divmod.quotient.4715@ohm>

On Wed, 31 Jan 2007 11:49:53 -0500, Dongsheng Ruan <ruan at jcmills.com> wrote:
>I remember that in python there is some kind of dummy statement that just
>holds space and does nothing.
>
>I want it to hold the place after a something like if a>b: do nothing
>
>I can't just leave the space blank after if statement because there will be
>error message.
>
>Does anybody know what to insert there?

http://python.org/doc/tut/node6.html#SECTION006500000000000000000

Jean-Paul


From fdelente at mail.cpod.fr  Sat Jan 27 02:43:59 2007
From: fdelente at mail.cpod.fr (Fabrice DELENTE)
Date: 27 Jan 2007 07:43:59 GMT
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
	<45ba50c7$0$31432$426a74cc@news.free.fr>
	<slrnerks72.jc.horpner@FIAD06.norwich.edu>
	<12rl5mq4nnqoea0@corp.supernews.com>
	<45bafda7$0$2417$426a74cc@news.free.fr>
Message-ID: <45bb02bf$0$26684$426a34cc@news.free.fr>

Incidentally, I noticed something about the environment: in my script, I use
the LINES and COLUMNS environment vars that are set in my shell:

columns=int(os.environ.get("COLUMNS"))
lines=int(os.environ.get("LINES"))

In the shell, I get

$ echo $LINES $COLUMNS
89 199

but python doesn't get these values. I have to start the script with

$ LINES=$LINES COLUMNS=$COLUMNS ./sort_entries.py

How come?

-- 
Fabrice DELENTE


From seandavi at gmail.com  Tue Jan  9 08:49:32 2007
From: seandavi at gmail.com (Sean Davis)
Date: 9 Jan 2007 05:49:32 -0800
Subject: mxODBC problems
Message-ID: <1168350572.375852.212740@i15g2000cwa.googlegroups.com>

I have just installed mxODBC on my x86_64 suse linux machine, where I
use unixODBC for connection.  Running queries from isql or DataManager
works fine for the DSN that I am using.  However, under mxODBC, I can
get a connection object and a cursor object, but all attempts to
execute even the simplest selects result in empty resultsets.  Any
ideas on what might be wrong?

>>> from mx.ODBC.unixODBC import *
>>> con = connect('Postgresql',user='username',password='passwd')
>>> cur = con.cursor()
>>> cur.execute('SELECT * FROM g_rif')
>>> rs = cur.execute('SELECT * FROM g_rif')
>>> rs
>>> cur.execute('SELECT * FROM g_rif').fetchall()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'NoneType' object has no attribute 'fetchall'

Thanks,
Sean



From ndbecker2 at gmail.com  Fri Jan 12 06:52:43 2007
From: ndbecker2 at gmail.com (Neal Becker)
Date: Fri, 12 Jan 2007 06:52:43 -0500
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
Message-ID: <eo7sqc$fvn$1@sea.gmane.org>

parallelpython at gmail.com wrote:

> Has anybody tried to run parallel python applications?
> It appears that if your application is computation-bound using 'thread'
> or 'threading' modules will not get you any speedup. That is because
> python interpreter uses GIL(Global Interpreter Lock) for internal
> bookkeeping. The later allows only one python byte-code instruction to
> be executed at a time even if you have a multiprocessor computer.
> To overcome this limitation, I've created ppsmp module:
> http://www.parallelpython.com
> It provides an easy way to run parallel python applications on smp
> computers.
> I would appreciate any comments/suggestions regarding it.
> Thank you!
> 

Looks interesting, but is there any way to use this for a cluster of
machines over a network (not smp)?



From michele.simionato at gmail.com  Fri Jan 26 23:27:29 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 26 Jan 2007 20:27:29 -0800
Subject: instancemethod
In-Reply-To: <mailman.2973.1169431114.32031.python-list@python.org>
References: <ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a@mail.gmail.com>
	<ep110v$t04$1@sea.gmane.org>
	<ef60af090701211712u4d5a520q84c8e86c898bc649@mail.gmail.com>
	<mailman.2973.1169431114.32031.python-list@python.org>
Message-ID: <1169872049.261689.263820@j27g2000cwj.googlegroups.com>

On Jan 22, 2:58 am, "Gert Cuykens" <gert.cuyk... at gmail.com> wrote:

> http://www.faqts.com/knowledge_base/view.phtml/aid/16824

There is a factual mistake on that reference. The last sentence

> One final note: the single most common use for classmethod is probably
> in overriding __new__(). It is always needed when overriding __new__()
> because __new__() is a classmethod.

is wrong, since __new__ is a staticmethod, NOT a classmethod.
Somebody (possibly me, if I find their emails somewhere) should
probably send a note to the authors
(Michael Chermside, Dennis Peterson, Ian Bicking) asking to fix that.

    Michele Simionato



From steve at REMOVE.THIS.cybersource.com.au  Mon Jan  8 05:29:30 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 08 Jan 2007 21:29:30 +1100
Subject: how to find the longst element list of lists
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
	<m2mz4ul1tk.fsf@unique.fqdn>
Message-ID: <pan.2007.01.08.10.29.29.887201@REMOVE.THIS.cybersource.com.au>

On Sun, 07 Jan 2007 20:55:19 -0500, Dan Sommers wrote:

> On Sun, 07 Jan 2007 22:23:22 +0100,
> "Michael M." <michael at mustun.ch> wrote:
> 
>> How to find the longst element list of lists?
>> I think, there should be an easier way then this:
> 
>>   s1 = ["q", "e", "d"]
>>   s2 = ["a", "b"]
>>   s3 = ["a", "b", "c", "d"]
> 
> [ snip ]
> 
> One more thing to think about:  if your list of lists grows (i.e., if
> you end up with thousands of lists instead of just three), then sorting
> may not be the way to go.  Assuming that list_of_lists is your list of
> lists, then something like this:
> 
>     longest_list, longest_length = list_of_lists[ 0 ], len( longest_list )
>     for a_list in list_of_lists[ 1 : ]:
>         a_length = len( a_list )
>         if a_length > longest_length:
>             longest_list, longest_length = a_list, a_length
> 
> will run faster than sorting the list just to pick off one element (O(n)
> vs. O(n log n) for all of you Big-Oh notation fans out there; you know
> who you are!).

But your O(n) code is running in relatively slow Python, while the sort
method, while O(n log n), is some of the fastest, most highly optimized C
code out there. Unless your list is truly gigantic, chances are the sort
version will win.

Here's my timing code:


import timeit

def getlongest1(list_of_lists):
    longest_list = list_of_lists[ 0 ]
    longest_length = len( longest_list )
    for a_list in list_of_lists[ 1 : ]:
        a_length = len( a_list )
        if a_length > longest_length:
            longest_list, longest_length = a_list, a_length
    return longest_list

def getlongest2(list_of_lists):
    list_of_lists.sort(key=len)
    return list_of_lists[0]

def make_list_of_lists(length):
    return [[None]*i for i in xrange(length)]

t1 = timeit.Timer("getlongest1(L)", "from __main__ import getlongest1, L")
t2 = timeit.Timer("getlongest2(L)", "from __main__ import getlongest2, L")



Note that my test list_of_lists grows very big quite fast, like O(n**2).
Assuming Python pointers are eight bytes, a mere length=10000 will
require over 760MB just for the pointers. More realistic data may allow
more extensive testing.

And here are my timing results:

>>> L = make_list_of_lists(1)
>>> print t1.timeit(1000), t2.timeit(1000)
0.00209903717041 0.00367403030396

>>> L = make_list_of_lists(10)
>>> print t1.timeit(1000), t2.timeit(1000)
0.00871086120605 0.00775289535522

>>> L = make_list_of_lists(100)
>>> print t1.timeit(1000), t2.timeit(1000)
0.121382951736 0.0518100261688

>>> L = make_list_of_lists(1000)
>>> print t1.timeit(1000), t2.timeit(1000)
0.809508085251 0.508343935013

>>> L = make_list_of_lists(10000)
>>> print t1.timeit(100), t2.timeit(100)
0.906499147415 0.732254981995

>>> L = make_list_of_lists(20000)
>>> print t1.timeit(100), t2.timeit(100)
1.83560800552 1.58732700348

For a list of 1 item, sorting is 1.8 times SLOWER; 
For a list of 10 items, sorting is 1.1 times FASTER;
For 100 items, sorting is 2.3 times faster;
For 1000 items, sorting is 1.6 times faster;
For 10,000 items, sorting is 1.2 times faster;
For 20,000 items, sorting is 1.1 times faster.


The precise results depend on the version of Python you're running, the
amount of memory you have, other processes running, and the details of
what's in the list you are trying to sort. But as my test shows, sort has
some overhead that makes it a trivial amount slower for sufficiently small
lists, but for everything else you're highly unlikely to beat it. 



-- 
Steven.



From kylotan at gmail.com  Tue Jan  2 12:08:41 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 2 Jan 2007 09:08:41 -0800
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <mailman.2211.1167756187.32031.python-list@python.org>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
	<mailman.2211.1167756187.32031.python-list@python.org>
Message-ID: <1167757721.883547.70530@42g2000cwt.googlegroups.com>

Chris Lambacher wrote:

> On Sat, Dec 30, 2006 at 04:55:09PM -0800, Ben Sizer wrote:

> > Yet many scripts and applications require parameters, or to be executed
> > from a certain directory. For example, setup.py. Or the various
> > turbogears scripts. Or easy_install.

> Martin's point was that if you need to pass arguments, you can call the script
> from the command line like so:
> setup.py install
>
> The python part of the 'python setup.py install' idiom needs to be omitted on
> Windows, but that does not mean that the solution is to automatically add it
> to PATH.

Firstly, that solution only works for actual Python scripts; it doesn't
solve the utility scripts that are often installed to the /scripts
directory. It's a shame that many responses on this thread don't
address that half of the issue. Am I the only person who installs
packages that add scripts (not all of which are Python ones)?

Secondly, it's still a significant difference from the Unix-based
installs. You're right, the solution doesn't automatically have to be
adding it to the PATH - but I'm yet to see a good argument for choosing
not to, apart from "I don't like it when apps do that".

> The documentation is misleading... time for a but report:
> http://sourceforge.net/tracker/index.php?func=detail&aid=1626300&group_id=5470&atid=105470

Fixing the docs is better than nothing, but I believe fixing the
install to encourage uniform usage across all platforms is preferable,
and that in this regard the documentation shows how it 'should' work.

> > There appears to be a freely-available binary at this address that may
> > suffice:
> > http://legroom.net/modules.php?op=modload&name=Open_Source&file=index&page=software&app=modpath

> Unfortunately the Python installer is not an InnoSetup installer.

The page I linked to is a bit misleading but there is an executable on
that page. All you then have to do is invoke it with the relevant
parameter.

-- 
Ben Sizer



From nagle at animats.com  Thu Jan 25 23:43:35 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 26 Jan 2007 04:43:35 GMT
Subject: Python does not play well with others
In-Reply-To: <7xzm864y36.fsf@ruckus.brouhaha.com>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
	<1169726842.719104.304300@v45g2000cwv.googlegroups.com>
	<wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
	<1169755188.989078.75510@v33g2000cwv.googlegroups.com>
	<7xveiudg4o.fsf@ruckus.brouhaha.com>
	<HL8uh.13092$ji1.4793@newssvr12.news.prodigy.net>
	<7xzm864y36.fsf@ruckus.brouhaha.com>
Message-ID: <XFfuh.75840$wP1.46499@newssvr14.news.prodigy.net>

Paul Rubin wrote:
> John Nagle <nagle at animats.com> writes:
> 
>>    That's the problem.  We now have four SSL implementations for
>>Python, none of which let you do all the things OpenSSL can do.
> 
> 
> I'm aware of some OpenSSL wrappers plus TLSlite.  Am I missing a
> couple more?  I guess maybe the OpenSSL wrappers also work on GnuTLS.
> 
> 
>>    Can you build the built-in SSL package without building all of
>>Python?  
> 
> 
> I thought there was no built-in SSL package-- it just calls OpenSSL.

     "import SSL" brings in a .dll or .so object called "_ssl.pyd".
This contains C glue code which connects Python to the
C-based OpenSSL library.  That's the component which needs work.
Its source code is at

   http://svn.python.org/view/python/trunk/Modules/_ssl.c

     Part of the problem is that the build of _ssl.pyd
is too integrated into the main Python build to work on easily.
You can't just build and test a new SSL module and give it to others
to test.  You have to rebuild the whole Python system, and
people who want to test the modified module need to run a
custom Python build.

     SSL is somewhat integrated into the socket module internally,
although from the code I don't see that this is absolutely
necessary.  The build machinery for SSL is in

   http://svn.python.org/view/python/trunk/setup.py

     After looking at that for a while, and the directory
structure, it looks like the Python directory layout and
build system makes the assumption that anything in the
standard distribution is built as part of the basic
Python build.  The module itself could be separated from
the trunk build; Python will run without it.   It's the
build process and directory structure which ties it up.

     As far as I can tell, there's no concept in the
Python build system of a module that's built separately
but ships with the standard Python distribution.  Is
that correct?

     So now I understand why the standard SSL module doesn't
get fixed, and why there are three or four alternative
re-implementations of it.  It's easier to replace than
to repair.

				John Nagle


From bj_666 at gmx.net  Tue Jan  9 19:13:38 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 10 Jan 2007 01:13:38 +0100
Subject: find.find
References: <eo15uq$hna$1@ss408.t-com.hr>
Message-ID: <pan.2007.01.10.00.13.37.285217@gmx.net>

In <eo15uq$hna$1 at ss408.t-com.hr>, Gigs_ wrote:

> import fnmatch, os
> 
> def find(pattern, startdir=os.curdir):
>      matches = []
>      os.path.walk(startdir, findvisitor, (matches, pattern))
>      matches.sort()
>      return matches
> 
> def findvisitor((matches, pattern), thisdir, nameshere):  #
>      for name in nameshere:
>          if fnmatch.fnmatch(name, pattern):
>              fullpath = os.path.join(thisdir, name)
>              matches.append(fullpath)
> 
> can someone explain why (matches, pattern) is doing in this two funct?

It's the first argument to `findvisitor()` which is invoked for every
directory level by `os.path.walk()`.  `findvisitor()` adds all file names
that match `pattern` to the `matches` list.

Ciao,
	Marc 'BlackJack' Rintsch


From nagle at animats.com  Thu Jan 25 12:17:16 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 25 Jan 2007 17:17:16 GMT
Subject: Python does not play well with others
In-Reply-To: <1169726842.719104.304300@v45g2000cwv.googlegroups.com>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
	<1169726842.719104.304300@v45g2000cwv.googlegroups.com>
Message-ID: <wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>

Paul Boddie wrote:
> On 25 Jan, 12:01, "Ben Sizer" <kylo... at gmail.com> wrote:
> 
>> I think that is why many of the SIGs are stagnant, why the standard library
>> has so much fluff yet still lacks in key areas such as multimedia and web
>> development, etc.
> ... I think this is also a good insight into why things are as they are 
> within the core development section of the community, although one can wonder
> what some people actively developing the language are actually doing with it
> if they are satisfied with the state of some of the standard library
> solutions. However, there are lots of factors which motivate people and the
> proliferation (or otherwise) of solutions to common problems: whether one
> develops one's own solutions as separate projects and/or tries to push for a
> consensus, whether one cares about other people using such solutions, whether
> one aspires to contributing to the standard library.
> 
> Over the years, people have tended towards building their own communities
> around their projects rather than attempting to engage the wider Python
> community, and I think a motivation behind that has been the intractability
> of improving parts of the standard library.

    Yes.  Working on "frameworks" is perceived as cooler than working
on libraries.  Things like Ruby on Rails, Struts, Zope, and Twisted
get attention.  There are papers and conferences on these things.
It's hard to get people excited about overhauling
the CGI library, or making mod_python work securely in shared-hosting
environments.

    The key distinction between a framework and a library is that users
are expected to make their code fit the framework.  In particular,
frameworks aren't expected to play well with each other.  If you need
something from Zope and something from Twisted, you're probably not
going to be able to make it work.  Libraries, on the other hand,
are expected to play well together.  Which means that they have to
handle the hard cases correctly, not just the easy ones.

> True. It also doesn't address the issue of development priorities and their
> role in defining the platform's own standards
...
> I do wonder whether the interests of language/runtime project developers
> eventually become completely aligned with the needs of such projects, making
> things like "multimedia and web development" seem irrelevant, uninteresting
> or tangential. This has worrying implications for the perceived relevance of
> Python with regard to certain kinds of solutions, despite the wealth of
> independently produced libraries available for the language.

    Something like that happened to the C++ standards committee.
The committee was captured by the template fanatics, and most new
standards work involves doing computation at compile time via template
expansion.   That's seldom done in production code, yet most of the
standards effort is devoted to making cool template hacks work better.
Meanwhile, real problems, like doing something about memory leaks and buffer
overflows, are ignored by the C++ committee.  As a result, C++ is
being displaced by Java and C#, which don't have elaborate templates but do have
memory safety.

    I'm not sure how the Python development community will deal with this
problem.  But what's happened in the C++ standards world has clearly
been very bad for users of the language.  Learn from the mistakes there.

    My main concern is with glue code to major packages.  The connections
to OpenSSL, MySQL, and Apache (i.e. mod_python) all exist, but have major
weaknesses.  If you're doing web applications, those are standard pieces
which need to work right.  There's a tendency to treat those as abandonware
and re-implement them as event-driven systems in Twisted.  Yet the
main packages aren't seriously broken.  It's just that the learning curve
to make a small fix to any of them is substantial, so nobody new takes
on the problem.

				John Nagle
				Animats


From pavlovevidence at gmail.com  Sat Jan 27 07:51:19 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 27 Jan 2007 04:51:19 -0800
Subject: New vs Old Style Python Classes in C Extensions?
In-Reply-To: <mailman.3230.1169896140.32031.python-list@python.org>
References: <mailman.3230.1169896140.32031.python-list@python.org>
Message-ID: <1169902279.509258.62290@q2g2000cwa.googlegroups.com>

On Jan 27, 6:11 am, Jeff Rush <j... at taupro.com> wrote:
> While I have a reasonable understanding of the differences in new-style versus
> old-style classes, tonight while working a C extension module I realized I
> don't know how to indicate which style my C extension module should appear as.
>
> I'm following the Python docs for extended modules, but it doesn't say in
> there anyplace I can find which style I'm creating.  My clue that something
> was wrong is when this:
>
> from cextension import Context
>
> class MyContext(Context):
>
>      def __init__(self):
>          super(Context, self).__init__()
>
> repeatedly and reliably failed with a corrupted C data structure, while this:
>
> class MyContext(Context):
>
>      def __init__(self):
>          Context.__init__()
>
> worked without any problems.  As I understand it, the former uses new-style
> semantics while the latter uses old-style, and -thats- when I realized I have
> no idea which my C extension implemented.
>
> Any enlightenment?

Short answer:

It has nothing to do with old-style classes, and is probably just due 
to a mistake in your extension.

Longer answer:

C extention types have never implemented old-style classes.  Before 
Python 2.2, classes and types were different things.  All class 
instances were of the same type.  However, C extension objects were a 
different type, and weren't class instances at all.

Nowadays, new-style classes are types, but the converse isn't 
necessary true.  In particular, the typical way of defining old 
extension types didn't work as a new-style type.  So, as part of type-
class unification, they added some new fields (tp_members, tp_new, and 
so on) and new idioms to replace some of the old idioms, effectively 
creating "new-style types".

Unless you've adopted the new ways, your type isn't going to work as a 
class.  If you have adopted the new ways, then it's probably just a 
mistake in your code.

I suspect you have adopted the new ways, because I'd expect Python to 
raise TypeError when trying to subclass a function.  So you probably 
just have a bug.


Carl Banks



From steve at holdenweb.com  Fri Jan 26 10:53:25 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 26 Jan 2007 15:53:25 +0000
Subject: loose methods: Smalltalk asPython
In-Reply-To: <1167260492.174445.98470@n51g2000cwc.googlegroups.com>
References: <mailman.2058.1167254642.32031.python-list@python.org>
	<1167260492.174445.98470@n51g2000cwc.googlegroups.com>
Message-ID: <epd86i$era$1@sea.gmane.org>

Carl Banks wrote:
> Jan Theodore Galkowski wrote:
>>> We've not had
>>> an excellent dynamic OO language since Smalltalk, IMO.
> 
> I would say that "excellence" in object oriented programming is not a
> strong design goal of Python.  Python tries to support OOP well, but
> not to enhance OOP to the detriment of other, more important goals.
> 
> [snip]
>>> Guido was opposed to modifying builtin types before Java existed.  It's
>>> similar to his opposition to dynamic syntax.
>> Opposition or not, the language definition is there.  Surely Smalltalk's
>> OO style can be respected.  Smalltalkers have been doing OO in a dynamic
>> context longer than many.  There are things to learn there.
> 
> Well, that Smalltalk and Ruby do this at least suggests that it won't
> be the end of the world as we know it if it were to happen in Python.
> Personally, I'm with Guido here.  Allowing this might make Python's OOP
> more "excellent", but it would be to the detriment of other, more
> important goals, like minimizing surprise.
> 
>> There are two things here that need to be kept straight, I think.
>>
>> One is the primacy of builtin types.
>>
>> The other is placing those builtins at the top of their own object
>> hierarchy.  Is "int", properly speaking, a descendent of "object"?  No,
>> it's the root of its own tree.
> 
> Are you saying that it shouldn't be a descendant of "object", or that
> it isn't?  "int" is certainly a subclass of "object" in Python (as are
> all objects).
> 
>> Smalltalk has "int" as well, as a
>> *subclass* of Number.  It's primitive.
> 
> Number is primitive?  I thought all types in Smalltalk had a common
> base type.
> 
> Anyways, Python 3000 is exploring the idea of an abstract hierarchy
> that has classes (interfaces?) like Number and Sequence.  In fact, I
> even saw some talk about somehow being able to retrofit classes to
> support one of these interfaces/ABCs, though it was pretty conjectural.
> 
>> In any case, as respectful of Mr/Dr van Rossum as I am, simply because
>> so-and-so says something is bad and therefore it must be true is a
>> fallacious response.
> 
> The same could be said of Smalltalk, i.e., because Smalltalk does it
> therefore it is good is just as fallacious.
> 
> Regardless, whatever Guido pronounces is what happens.  If he's
> adamantly against something, it's pretty much an academic discussion.
> 
Just to be perverse, there was an example recently where a developer 
asked (on python-dev) about the best way to trap and note the creation 
of all objects.

With a proper hierarchy, in which everything calls its parent's 
constructor all the way up to object, in theory (and ignoring old-style 
classes) it would be possible to simply modify the behaviour of object. 
Unfortunately this is a no-no because object's behaviour is hard-wired 
into the CPython interpreter.

The general feeling on python-dev seems to be that this is a step too 
far, and that the confusion engendered by this kind of patching would 
not be worth the benefits gained. Certainly it appears to this reader 
that such a feature woudl be more abused than used.

The principle of least surprise thus reigns for now.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From exarkun at divmod.com  Fri Jan 19 10:16:38 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 19 Jan 2007 10:16:38 -0500
Subject: Wierd M2Crypto bug - phony "peer did not return certificate" error
In-Reply-To: <CoFph.33142$Gr2.8155@newssvr21.news.prodigy.net>
Message-ID: <20070119151638.17245.139266307.divmod.quotient.1609@ohm>

On Fri, 12 Jan 2007 05:54:42 GMT, John Nagle <nagle at animats.com> wrote:
>Heikki Toivonen wrote:
>> nagle at animats.com wrote:
>>
>>>  That's a problem for me.  I need short timeouts; I'm accessing sites
>>>that might or might not have SSL support, and I need to quickly time
>>>out when there's no SSL server.
>>
>>
>> You should be able to do short timeouts, just not using the global
>> setdefaulttimeout. Have you tried Connection.set_socket_read/write_timeout?
>
>     Yes.  That does not affect the connect timeout; it's only effective once
>the connection has been opened.  And adjusting the session timeout
>just recreates the blocking/non blocking problem.
>
>     Incidentally, "get_socket_read_timeout()" doesn't work.  Generates
>"EXCEPTION at socket level: unpack str size does not match format",
>every time, at least with Python 2.4 on Windows.  The lower level
>function returns one number as a string, like "7200", and the unpack
>function tries to unpack it as "ll", which fails.
>
>> Also like I mentioned before, if you use the Twisted wrapper and let
>> Twisted handle network stuff you should be fine.
>
>     That would mean struggling with Twisted and dealing with its bugs.
>(For example, has the MySQLdb mess been resolved for Twisted's API?)

http://twistedmatrix.com/trac/search?q=MySQLdb&noquickjump=1&ticket=on

I'd say so, unless you're referring to a bug you never reported (we only
fix those at about half the rate of reported bugs).

Jean-Paul


From elrondrules at gmail.com  Mon Jan 29 21:42:07 2007
From: elrondrules at gmail.com (elrondrules at gmail.com)
Date: 29 Jan 2007 18:42:07 -0800
Subject: Convert raw data to XML
Message-ID: <1170124927.718200.225080@m58g2000cwm.googlegroups.com>

Hi

I am running a HTTP server which receives post from a process.
In my do_POST method am receiving raw data.

I know that this raw data has a valid XML content and I need to 
convert this into an XML file.

Are there any routines to do this.. if not how to write one..

For example the raw data is as follows

<?xml version="1.0" ?><Blah><ABC><Id id="1"/><Description>SomeText </
Description><Result>PassorFail</Result></ABC></Blah>

without spaces or new lines. I need this to be written into an XML 
file as

<?xml version="1.0" ?>
<Blah>
       <ABC>
              <Id id="1"/>
              <Description>
                         SomeText
              </Description>
              <Result>
                         PassorFail
              </Result>
      </ABC>
</Blah>

The tags in the raw data are not the same alaways.. Hence I need a 
generic routine that does the trick

Any pointers for this issue would help

Thanks



From ahmad_6132 at yahoo.com  Tue Jan 16 16:05:04 2007
From: ahmad_6132 at yahoo.com (ahmad6132)
Date: 16 Jan 2007 13:05:04 -0800
Subject: Very beautiful
Message-ID: <1168981504.269881.215660@51g2000cwl.googlegroups.com>

1) If you are looking for the truth to soothe and please your self,
just click on

this link.
2)  If you are looking for the secrt of the family happiness, just
click on this link.
3) If you are looking for solving any social problem you face, just
click on this link.



http://www.sultan.org/articles/purposeoflife.htm



From gagsl-py at yahoo.com.ar  Mon Jan 29 23:55:01 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 01:55:01 -0300
Subject: creating a dictionary
References: <e04d2e90701291845v46f56c7eged842e7a7b6d99e@mail.gmail.com>
Message-ID: <op.tmx8xmjfsd1mbx@gabriel2.softlabbsas.com.ar>

En Mon, 29 Jan 2007 23:45:40 -0300, mark <rkmr.em at gmail.com> escribi?:

> i have few variables and i want to create a dictionary with these  
> variables
> such that the keys are the variable names and the corresponding values
> are the variable values.how do i do this easily?
> for ex:
> var1='mark'
> var2=['1','2','3']
> my_dict = create_my_dictionary(var1, var2)
>
> and my_dict is {'var1':'mark', 'var2':['1','2','3']}
>
> is there a function for create_my_dictionary?

var1='mark'
var2=['1','2','3']
my_dict = dict(var1=var1, var2=var2)

In addition, if you are inside a function, and these are the only  
variables, using locals() may be useful too:

def f():
   a = 1
   b = 2
   c = locals()
   print c
   d = 3

prints {'a': 1, 'b': 2}

-- 
Gabriel Genellina



From perica.zivkovic at gmail.com  Sat Jan 13 05:36:11 2007
From: perica.zivkovic at gmail.com (perica.zivkovic at gmail.com)
Date: 13 Jan 2007 02:36:11 -0800
Subject: Portable Python - free portable development environment !
In-Reply-To: <mailman.2676.1168641529.32031.python-list@python.org>
References: <1168533423.224355.221390@k58g2000hse.googlegroups.com>
	<mailman.2598.1168551029.32031.python-list@python.org>
	<1168639781.763133.319580@s34g2000cwa.googlegroups.com>
	<mailman.2676.1168641529.32031.python-list@python.org>
Message-ID: <1168684571.205607.277920@s34g2000cwa.googlegroups.com>

yes on both last messages :)

More platforms will be included if there is enoug people interested in
that.

and something like Enthought edition will be there :) with even more
packages and options :) at least that is my goal for the future :) But
I must say I will also always be carefull with size of the distro :)
thats also important right? :)

in this first release I focused on making it possible to work with
django (because that is what I needed) and more functionality, libs,
ide's will be added in future versions.

more ideas?

grtz

Perica

s... at pobox.com wrote:
> perica> but this is first release and I have big plans ;)
> 
> Including maybe other platforms than Windows?
> 
> Skip



From mikael at isy.liu.se  Tue Jan 30 10:33:02 2007
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Tue, 30 Jan 2007 16:33:02 +0100
Subject: Please take me off the list
In-Reply-To: <B40EE572-0110-1000-9DC8-F4C4A789181E-Webmail-10019@mac.com>
References: <B40EE572-0110-1000-9DC8-F4C4A789181E-Webmail-10019@mac.com>
Message-ID: <45BF652E.6090201@isy.liu.se>

Daniel kavic wrote:
> Sorry to waste email space , but I wish to be off this list because I have tried python and it is too difficult for me.
>   

That's sad. Go to

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

and follow instructions.

/MiO


From bjourne at gmail.com  Tue Jan 30 09:33:59 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Tue, 30 Jan 2007 15:33:59 +0100
Subject: How can I know both the Key c and Ctrl on the keyboard are
	pressed?
In-Reply-To: <1170164680.123191.206630@p10g2000cwp.googlegroups.com>
References: <1170147029.261981.322740@a75g2000cwd.googlegroups.com>
	<1170164680.123191.206630@p10g2000cwp.googlegroups.com>
Message-ID: <740c3aec0701300633o3480c8acu8a01c7c5b37e96d4@mail.gmail.com>

On 30 Jan 2007 05:44:40 -0800, Szabolcs Nagy <nszabolcs at gmail.com> wrote:
> however Ctrl+C is a special key combination: running python in a unix
> terminal it raises KeyboardInterrupt exception, imho in a windows cmd
> promt it raises SystemExit

No it is KeyboardInterrupt in Windows too.

-- 
mvh Bj?rn


From kay.schluehr at gmx.net  Tue Jan 23 16:43:27 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 23 Jan 2007 13:43:27 -0800
Subject: Overloading assignment operator
In-Reply-To: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <1169588607.163039.216270@a75g2000cwd.googlegroups.com>


Achim Domma schrieb:

> Hi,
>
> I want to use Python to script some formulas in my application. The user
> should be able to write something like
>
> A = B * C
>
> where A,B,C are instances of some wrapper classes. Overloading * is no
> problem but I cannot overload the assignment of A. I understand that
> this is due to the nature of Python, but is there a trick to work around
> this?

Not that I know about it but what shall be the behaviour of assignment
when being overloaded? 

Kay



From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 19 21:22:52 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 20 Jan 2007 13:22:52 +1100
Subject: OT Annoying Habits (Was: when format strings attack)
References: <mailman.2916.1169240529.32031.python-list@python.org>
Message-ID: <pan.2007.01.20.02.22.52.492763@REMOVE.THIS.cybersource.com.au>

On Fri, 19 Jan 2007 12:20:26 -0800, Carroll, Barry wrote:

> It took me about 3 seconds to realize that Mr. D'Aprano' Q&A session was
> laid out bottom-to-top instead of top-to-bottom.  After that, it made
> perfect sense.

Three seconds, compared to about thirty milliseconds if it were written in
the normal fashion. That's an inefficiency of about two orders of
magnitude. Multiply that by a few hundred news posts and emails that you
might read in a day, and, well, I think that makes it a big deal. That
means top posting is to effective communication what exchange-sort is to
quicksort.

I use the analogy advisably: just as there is overhead to quicksort that
makes it slower for sufficiently small lists, so there is overhead to
in-line posting that makes top posting easier for the reader under quite
restricted circumstances: you're reading the posts in order, and the
entire thread (or at least the relevant parts of it) are still in short
term memory.

> While it was a excellent way to demonstrate his
> argument, it failed to prove his point, because, while top-to-bottom may
> be the way he reads things, it isn't the way _everyone_ reads things.  

There are, as far as I know, no human languages that write from the
bottom of the page upwards.

But even if there are such languages, we're on an English language
newsgroup, not Martian, and so we should (whenever possibly) adapt English
conventions. 
 
> So, as far as I'm concerned, post your posts in whatever manner works
> for you.  If it's in English, I'll figure it out.  If not, well, there's
> always Babelfish.   ;^)

Or perhaps I should say:

.snoitnevnoc
hsilgnE tpada )ylbissop revenehw( dluohs ew os dna ,naitraM ton ,puorgswen
egaugnal hsilgnE na no er'ew ,segaugnal hcus era ereht fi neve tuB



-- 
Steven.



From steve at REMOVE.THIS.cybersource.com.au  Wed Jan 24 16:43:14 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 25 Jan 2007 08:43:14 +1100
Subject: Re-thinking my if-thens - a software engineering question
References: <1169668287.517657.24450@l53g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.24.21.43.14.84812@REMOVE.THIS.cybersource.com.au>

On Wed, 24 Jan 2007 11:51:27 -0800, metaperl wrote:

> Ok, I have a module called textgen.py. The point of this module is to
> generate a csv file from an array of dictionaries.

You probably should use the csv module to do the grunt work, leaving your
module just to massage the dicts into a form that csv can handle.


> As I iterate through
> each dictionary, I "massage" the dictionary values before writing them
> out to csv. Now, for one dictionary entry, I have the following code:
> 
>             if dict_key == 'PCN':
> 		fields = dict_val.split("/")
>                 mo = re.match( '(\w{2})(\d{2})(\d{2})' , fields[1] )
> 		if mo:
> 		    dict_val = "%s/%s%s/%s" % (fields[0], mo.group(1), mo.group(3),
> fields[2][1:])
> 		else:
> 		    dict_val = dict_val

Your indentation seems very inconsistent -- the lines starting with
"fields = ..." and "mo = ..." should have the same indentation.

The line "dict_val = dict_val" is a no-op. You could just as easily write
that as "pass", or even better, leave out the entire else clause.

Reading between the lines, it sounds like you have a mass of if...elif
clauses, like this:

if dict_key == 'PCN':
    # some processing
elif dict_key == 'NCP':
    # some different processing
elif ...
    # blah blah blah
else:
    # default processing


This is an excellent candidate for dictionary-based dispatching. First,
write a function for each processing block:

def process_PCN(value):
    # do stuff to value
    return result

and then create a dispatch table:

dispatcher = {"PCN": process_PCN, "NCP": process_NCP, ...}

Now your huge if...elif block becomes one line:

# no default processing
dispatcher[dict_key](dict_value)

# with default processing
dispatcher.get(dict_key, process_default)(dict_value)


> Ok, so now here is what has happened. This code was based on the
> assumption that dict_val would have 2 forward slashes in it. It turns
> out that I need to follow a different process of massaging when no
> slashes are present. A naive solution would be something like:
> 
> if dict_key == 'PCN':
>                     fields = dict_val.split("/")
>                     if fields == 3:

That can't possibly work. fields is a list, not an integer.

I think you want if len(fields) == 3.

>                         dict_val = pcn_three(fields) # where pcn_three
> is the code above
>                 else:
>                     # new logic
> 
> But I am wondering if I should abstract the flow of control into a
> class or something.

Nope. Abstract it into functions.



-- 
Steven.



From mccredie at gmail.com  Wed Jan  3 10:53:49 2007
From: mccredie at gmail.com (Matimus)
Date: 3 Jan 2007 07:53:49 -0800
Subject: C/C++, Perl, etc. to Python converter
In-Reply-To: <G3Qmh.94$9v1.124@nntpserver.swip.net>
References: <G3Qmh.94$9v1.124@nntpserver.swip.net>
Message-ID: <1167839629.435980.311750@k21g2000cwa.googlegroups.com>

I don't know of a converter, one may exist. I have seen similar
requests though and will give you a similar response to what I have
seen. A converter, if it exists, may be able to produce working code
but _not_ readable code. Python is a language whose strength comes
from, among other things, its readability and conventions. Learning
python is best done by using the online documentation
(http://docs.python.org/tut/tut.html) and reading existing code (take a
look at the built in modules).

My biggest fear of teaching someone to program by using a program to
convert perl to python is that they will end up writing python that
still looks like perl.

I don't know if it helps, but I know others will give you similar
advice.

-Matt



From gigs at hi.t-com.hr  Thu Jan 11 10:02:00 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Thu, 11 Jan 2007 16:02:00 +0100
Subject: os.mkfifo
Message-ID: <eo5jh9$2ng$1@ss408.t-com.hr>

is os.mkfifo available on windows xp

thx


From larry.bates at websafe.com  Tue Jan 30 09:57:09 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 30 Jan 2007 08:57:09 -0600
Subject: data design
In-Reply-To: <45bf5763$0$22792$426a34cc@news.free.fr>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
Message-ID: <45BF5CC5.5060306@websafe.com>

Imbaud Pierre wrote:
> The applications I write are made of, lets say, algorithms and data.
> I mean constant data, dicts, tables, etc: to keep algorithms simple,
> describe what is peculiar, data dependent, as data rather than "case
> statements". These could be called configuration data.
> 
> The lazy way to do this: have modules that initialize bunches of
> objects, attributes holding the data: the object is somehow the row of
> the "table", attribute names being the column. This is the way I
> proceeded up to now.
> Data input this way are almost "configuration data", with 2 big
> drawbacks:
>  - Only a python programmer can fix the file: this cant be called a
>    configuration file.
>  - Even for the author, these data aint easy to maintain.
> 
> I feel pretty much ready to change this:
> - make these data true text data, easier to read and fix.
> - write the module that will make python objects out of these data:
> the extra cost should yield ease of use.
> 
> 2 questions arise:
> - which kind of text data?
>     - csv: ok for simple attributes, not easy for lists or complex
>     data.
>     - xml: the form wont be easier to read than python code,
>       but an xml editor could be used, and a formal description
>       of what is expected can be used.
> - how can I make the data-to-object transformation both easy, and able
>   to spot errors in text data?
> 
> Last, but not least: is there a python lib implementing at least part
> of this dream?

Use the configurations module.  It was built to provide a way to parse
configuration files that provide configuration data to program.  It is
VERY fast so the overhead to parse even thousands of lines of config
data is extremely small.  I use it a LOT and it is very flexible and
the format of the files is easy for users/programmers to work with.

-Larry Bates


From nogradi at gmail.com  Tue Jan 30 08:44:30 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Tue, 30 Jan 2007 14:44:30 +0100
Subject: subway code
Message-ID: <5f56302b0701300544u4c64c1cao7a2b97460e7a3b23@mail.gmail.com>

Does anyone know what happened to the subway project?

The sites gosubway.org and subway.python-hosting.com have been down
for a long time now. Actually, I would like to have the code just to
look at it and maybe learn something, but it seems it completely
disappeared from the net. Does anyone has access to it and the rights
to make it publically available?


From nospam at riddergarn.dk  Mon Jan 29 10:47:10 2007
From: nospam at riddergarn.dk (Scripter47)
Date: Mon, 29 Jan 2007 16:47:10 +0100
Subject: SQL connecting
Message-ID: <45BE16FE.4040703@riddergarn.dk>

Hey

It got a problem with python to connect to my SQL DBs, that's installed
on my apache server. how do i connect to sql? Gettting data? Insert into it?

it is a localserver with php if that means something

here is a *REALLY* dirty solution that a have used:
[CODE]
from urllib import *
# sql query
s = 'INSERT INTO `test` (`test`) VALUES ("1");'

# encode and insert into db
params = urlencode({'sql': sql})
urlopen("http://localhost/in/sql.php?%s" % params)
[/CODE]

-- 
   _________            .__        __                  ______________
  /   _____/ ___________|__|______/  |_  ___________  /  |  \______  \
  \_____  \_/ ___\_  __ \  \____ \   __\/ __ \_  __ \/   |  |_  /    /
  /        \  \___|  | \/  |  |_> >  | \  ___/|  | \/    ^   / /    /
/_______  /\___  >__|  |__|   __/|__|  \___  >__|  \____   | /____/
         \/     \/         |__|             \/           |__|




From gagsl-py at yahoo.com.ar  Sat Jan 13 23:29:55 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 14 Jan 2007 01:29:55 -0300
Subject: Tkinter code (with pmw) executing to soon please help
References: <1168746063.322340.10410@l53g2000cwa.googlegroups.com>
Message-ID: <eocbk1$o81$1@sea.gmane.org>

<Eric_Dexter at msn.com> escribi? en el mensaje 
news:1168746063.322340.10410 at l53g2000cwa.googlegroups.com...

> Instead of creating my buttons and waiting for me to press them to
> execute they are executing when I create them and won't do my callback
> when I press them..  thanks for any help in advance

This is a very frequent beginner's mistake. You are *calling* the event 
handler at the moment you create the buttons. You have to provide a 
*callable* but not call it yet.

> button[num] = Tkinter.Button(frame,text =  returnstring,
> command=callback(returnstring))#

So `callback` should return a function, like this:

def callback(text):
  def handler(event):
    print text

-- 
Gabriel Genellina 





From jstroud at mbi.ucla.edu  Fri Jan 19 17:07:56 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 19 Jan 2007 14:07:56 -0800
Subject: How to comment code?
In-Reply-To: <45b13876$0$323$e4fe514c@news.xs4all.nl>
References: <45b13876$0$323$e4fe514c@news.xs4all.nl>
Message-ID: <eorfft$iud$1@zinnia.noc.ucla.edu>

Martin P. Hellwig wrote:
> Hi all,
> 
> I've been toying with python for about two years now. Not every day, 
> just when I encounter something in my job (sysadmin) repetitively dull.
> The amazing thing is that like any other language (natural or not) 
> learning it more gives you power to express your thoughts better and 
> create something from nothing, for me this is something I can only 
> compare to freedom.
> 
> However since I'm learning more of python I've struggled with 
> commenting, how should I've comment my code? I'm not talking about the 
> style but more on the concept itself, things that where a couple of 
> month ago a bunch of monkey poop is now as easy as reading a comic.
> 
> I always give a brief description on what the code is supposed to do and 
>  I suppose that any serious coder knows way more then me about 
> programming so I don't bother to comment that much since it mostly (in 
> my eyes) just clutters up the code and makes it actually harder to read.
> 
> Though this makes me uncomfortably, commenting so little, I was thinking 
> that perhaps something like doctest (I'm not so much into unit testing 
> or the equivalents at this moment) has the side affect to make my code 
> more understandable and readable. Any practical experience you'd like to 
> share with me, any other comments are welcome too of course :-)

I have found it useful to familiarize myself some tool such as epydoc 
and write comments in the function doc-string. For example,

def doit(stuff, beta, cycles):
   """
   Does nothing with I{stuff} in an infinite loop by applying a null
   operation. The I{cycles} parameter is multiplied by infinity.

   @param beta: null operator not to be applied to stuff
   @type beta: callable
   @type cycles: int
   """

This explains paramaters, etc., for you and other users of your API and 
paves the way for automatically generated documentation. Note that it 
would be excessive to comment each and every parameter, etc. Once the 
code is working correctly, a lot of in-line comments can be removed. 
Usually, in python, correctly working code is self explanatory at the 
implementation level, especially if you attempt to code "pythonically" 
(which can roughly be defined as the best practices according to the 
python community or the community subset who post to comp.lang.python).

If you find that your code gets very complicated and needs excessive 
commenting to understand, try to factor it into hierarchically related 
simpler functions and classes and comment each individually using 
doc-strings. In essence, think about commenting the interface rather 
than the implementation.

Use module level doc-strings (comments) to gather usage and explanation 
  notes for the most useful functions. This allows users (for example, 
you) to use your libraries without burrowing into the automatically 
generated documentation for each and every function.

Other tools may be as useful as epydoc, but this is the general strategy 
I have converged upon.

James


From colinlandrum at gmail.com  Tue Jan  2 12:01:45 2007
From: colinlandrum at gmail.com (hubritic)
Date: 2 Jan 2007 09:01:45 -0800
Subject: popen on windows
In-Reply-To: <e58ap2pvkcjsp5jp3r2lrg6ra6bjc1to6h@4ax.com>
References: <1167239813.187357.206240@73g2000cwn.googlegroups.com>
	<e58ap2pvkcjsp5jp3r2lrg6ra6bjc1to6h@4ax.com>
Message-ID: <1167757305.044294.312140@k21g2000cwa.googlegroups.com>

Thanks for your reply. I figured it out. I was not closing the file
that path pointed to before executing the command. D'oh! So sometimes
it read the file that was created on the previous test run ...

Anyway, for the benefit of anyone who might be googling for a similar
question, what seems to work for running a command in Windows and
having it wait for the command to finish was (after closing the file
before I refer to it) was:

(this is python 2.4.3. I think subprocess was new in 2.4. See
documentation for subprocess module)

from subprocess import Popen
r = Popen(string_with_the_command, shell=True)
r.wait()

Sometimes the hardest part of python is to resist the urge to imagine
that things *must* be complicated and therefore the simpliest possible
solution can't possibly work ...



Daniel Klein wrote:
> On 27 Dec 2006 09:16:53 -0800, "hubritic" <colinlandrum at gmail.com>
> wrote:
>
> >I am trying to set off commands on Windows 2003 from python.
> >Specifically, I am trying to use diskpart with a script file (pointed
> >to with path).
> >
> >            cmd = ["diskpart",  "/s", path]
> >            p = Popen(cmd, shell=True)
> >
> >The script is meant to loop through twice. It will do so if I comment
> >out the Popen call and print cmd instead. But when Popen is called, one
> >disk will be formated, but not the next.
>
> What is the value of 'path' ?
> 
> Does the command work from a Windows command prompt ?
> 
> Dan



From hg at nospam.org  Tue Jan 23 01:54:34 2007
From: hg at nospam.org (hg)
Date: Tue, 23 Jan 2007 07:54:34 +0100
Subject: beep or sound playing under linux
References: <pFath.50034$oA1.40310@newsfe19.lga>
Message-ID: <gsoth.252459$Pv5.58346@newsfe17.lga>

hg wrote:

> Hi,
> 
> Is there a way to do that ?
> 
> Regards,
> 
> hg
Thanks to all ... got some reading to do.

hg



From nmm1 at cus.cam.ac.uk  Tue Jan 16 04:56:31 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 16 Jan 2007 09:56:31 GMT
Subject: Maths error
References: <mailman.2480.1168350033.32031.python-list@python.org><Xns98B384E126F4Ctim111one@216.196.97.136><eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136><eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org><eo7kdf$a80$1@gemini.csx.cam.ac.uk<eoabbl$270$1@gemini.csx.cam.ac.uk><mailman.2709.1168753952.32031.python-list@python.org><f4mlq29t80pvvqbfm2ch2r2uf6tfnhlmnl
	<
Message-ID: <eoi7gf$8he$1@gemini.csx.cam.ac.uk>


In article <mailman.2768.1168930376.32031.python-list at python.org>,
"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
|>
|> [ Interval arithmetic ]
|>
|> > |> For people just getting into it, it can be shocking to realize just how
|> > |> wide the interval can become after some computations.
|> >
|> > Yes.  Even when you can prove (mathematically) that the bounds are
|> > actually quite tight :-)
|> 
|> This sounds like one of those pesky:
|> "but you should be able to do better" - kinds of things...

It's worse :-(

It is rather like global optimisation (including linear programming
etc.)  The algorithms that are guaranteed to work are so catastrophically
slow that they are of theoretical interest only, but almost every
practical problem can be solved "well enough" with a hack, IF it is
coded by someone who understands both the problem and global
optimisation.

This is why the "statistical" methods (so disliked by Kahan) are used.
In a fair number of cases, they give reasonable estimates of the error.
In others, they give a false sense of security :-(


Regards,
Nick Maclaren.


From wanjunfeng at gmail.com  Tue Jan 16 21:54:19 2007
From: wanjunfeng at gmail.com (Kevin Wan)
Date: 16 Jan 2007 18:54:19 -0800
Subject: I wrote a C++ code generator in Python,
	would anyone please help me to review the code? :)
In-Reply-To: <1168991250.445208.159020@v45g2000cwv.googlegroups.com>
References: <1168930067.970099.164620@s34g2000cwa.googlegroups.com>
	<1168991250.445208.159020@v45g2000cwv.googlegroups.com>
Message-ID: <1169002459.483365.304190@38g2000cwa.googlegroups.com>

Sorry, I didn't write that much document.

But you can use fgen --help to get the usage.

I'm writing document now. :)

Thanks,
Kevin
mensanator at aol.com wrote:
> Kevin Wan wrote:
> > fgen is a free command line tool that facilitates cross platform c++
> > development, including header generation, cpp file generation, makefile
> > generation, unit test framework generation, etc.
> >
> > http://sf.net/projects/fgen
> >
> > I'm not very familiar with Python. Any feedback are appreciated!
>
> No documentation?
>
> Am I supposed to reverse engineer all the source files to figure out
> how I'm
> supposed to use it?
> 
> > Or
> > anyone like to develop it with me?
> > 
> > Thanks.



From huayang.xia at gmail.com  Fri Jan 12 11:28:06 2007
From: huayang.xia at gmail.com (Huayang Xia)
Date: 12 Jan 2007 08:28:06 -0800
Subject: How to modify object attribute by python C API
In-Reply-To: <1168551428.114028.278940@77g2000hsv.googlegroups.com>
References: <1168551428.114028.278940@77g2000hsv.googlegroups.com>
Message-ID: <1168619286.432190.104550@11g2000cwr.googlegroups.com>

Thanks for the replies.

For the checking, I found we have to spend a lot of codes to check the
Python API's results. That is a pain. Is it reasonable to ignore the
result check of APIs like PyString_FromString and PyString_AsString
which will fail only when out of memory. Unfortunately there is no
exception thrown (in C++) so that we can integrate the error handling.
What is the best way(less code) to handle the error checking in normal
practice?

On Jan 11, 4:37 pm, "Huayang Xia" <huayang.... at gmail.com> wrote:
> I get a python object by running a class' constructor. Then I need to
> modify the instance's attribute just like obj.attr1.attr2 = 'a' if in
> python's term.
>
>     PyObject* py_obj_attr1 = PyObject_GetAttrString(obj, "attr1");
>     PyObject_SetAttrString(py_obj_attr1, "attr2",
> PyString_FromString("a"));
>     Py_DECREF(py_obj_attr1);
>
> The object py_obj_attr1 is said to be a "New reference". It's
> confusing, does it refer to the same object as "obj.attr1" in python's
> term? So that the above code equals: obj.attr1.attr2 = 'a' in python's
> term.
> 
> I



From paddy3118 at netscape.net  Thu Jan 11 08:37:38 2007
From: paddy3118 at netscape.net (Paddy)
Date: 11 Jan 2007 05:37:38 -0800
Subject: dot operations
In-Reply-To: <1168511200.252193.132340@p59g2000hsd.googlegroups.com>
References: <1168511200.252193.132340@p59g2000hsd.googlegroups.com>
Message-ID: <1168522658.128216.199310@77g2000hsv.googlegroups.com>


jm.suresh at no.spam.gmail.com wrote:
> Hi,
>  Frequently I get to do like this:
> a = (1, 2, 3, 4) # some dummy values
> b = (4, 3, 2, 1)
> import operator
> c = map(operator.add, a, b)
>
> I am finding the last line not very readable especially when I combine
> couple of such operations into one line. Is it possible to overload
> operators, so that, I can use .+ for element wise addition, as,
> c = a .+ b
> which is much more readable.
>
> Similarly, I want to use .- , .*, ./   . Is it possible to do?
>
> thanks.
>
> -
> Suresh

List comprehensions?

>>> a = (1, 2, 3, 4)
>>> b = (4, 3, 2, 1)
>>> import operator
>>> c = map(operator.add, a, b)
>>> c
[5, 5, 5, 5]
>>> c1 = [a1+b1 for a1,b1 in zip(a,b)]
>>> c1
[5, 5, 5, 5]
>>> 


- Paddy.



From metaperl at gmail.com  Fri Jan 19 10:33:19 2007
From: metaperl at gmail.com (metaperl)
Date: 19 Jan 2007 07:33:19 -0800
Subject: PyMeld for html templates?
In-Reply-To: <mailman.2858.1169084154.32031.python-list@python.org>
References: <mailman.2858.1169084154.32031.python-list@python.org>
Message-ID: <1169220799.498403.168500@51g2000cwl.googlegroups.com>


Sean Schertell wrote:


>
> Of course I'm going to try them all but I wonder if anyone has any
> thoughts on PyMeld as a template system for churning out general
> websites?
>

meld3 evolved from pymeld. I use meld3 -
http://plope.com/software/meld3/
this whole style of templating is known as push-style (coined by
Terence Parr). Most systems are pull-style.


> sorted. But how about PyMeld, any ideas on how to do it or whether it
> will even work as I've described?
>

the meat and bread problem: each page has meat and you want to wrap it
with some standard bread. it's a basic tree rewrite and since meld3
uses ElementTree underneath, it is a piece of cake.



From paul at boddie.org.uk  Mon Jan  8 06:28:24 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 8 Jan 2007 03:28:24 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
	<pan.2007.01.07.22.10.37.701405@REMOVE.THIS.cybersource.com.au>
	<7xlkke19he.fsf@ruckus.brouhaha.com>
	<pan.2007.01.08.07.28.02.494235@REMOVEME.cybersource.com.au>
	<7xirfiyn3y.fsf@ruckus.brouhaha.com>
	<pan.2007.01.08.10.37.54.614464@REMOVE.THIS.cybersource.com.au>
Message-ID: <1168255704.559027.36020@s80g2000cwa.googlegroups.com>

Steven D'Aprano wrote:
>
> The truth of the matter is, MyClass.__private is not private at all. It is
> still a public attribute with a slightly unexpected name. In other words,
> if you want to code defensively, you should simply assume that Python has
> no private attributes, and code accordingly.
>
> Problem solved.

Well, it isn't really solved - it's more avoided than anything else.
;-)

Still, if one deconstructs the use of private data in various
programming languages, one can identify the following roles (amongst
others):

 1. The prevention of access to data from program sections
    not belonging to a particular component.
    (The classic "keep out" mechanism.)
 2. The enforcement of distinct namespaces within components.
    (Making sure that subclass attributes and superclass attributes
    can co-exist.)
 3. To support stable storage layouts and binary compatibility.

Most Python adherents don't care too much about #1, and Python isn't
driven by the need for #3, mostly due to the way structures (modules,
classes, objects) are accessed by the virtual machine. However, one
thing which does worry some people is #2, and in a way it's the
forgotten but more significant benefit of private data.

Before I became completely aware of the significance of #2, I remember
using various standard library classes which are meant to be subclassed
and built upon, thinking that if I accidentally re-used an attribute
name then the operation of such classes would be likely to fail in
fairly bizarre ways. Of course, a quick browse of the source code for
sgmllib.SGMLParser informed me of the pitfalls, and I'm sure that
various tools could also be informative without the need to load
sgmllib.py into a text editor, but if I had been fully aware of the
benefits of private attributes and could have been sure that such
attributes had been used (again, a tool might have given such
assurances) then I wouldn't have needed to worry.

So I suppose that to "code accordingly" in the context of your advice
involves a manual inspection of the source code of superclasses or the
usage of additional tools. Yet I suppose that this isn't necessarily
unusual behaviour when working with large systems.

Paul



From gagsl-py at yahoo.com.ar  Sat Jan 20 16:41:42 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 20 Jan 2007 18:41:42 -0300
Subject: python packages and __name__ query.
References: <f81479dd0701201112i7f443c17w588ea3f6f7fc7d42@mail.gmail.com>
Message-ID: <eou2ao$qja$1@sea.gmane.org>

"krishnakant Mane" <researchbase at gmail.com> escribi? en el mensaje 
news:f81479dd0701201112i7f443c17w588ea3f6f7fc7d42 at mail.gmail.com...

> I use cx freze for creating a python executable.
cx_freeze is almost irrelevant here; all the following considerations are 
about your application structure, it doesnt matter if you use cx_freeze 
later (or any other tool).

>  my software is
> essentially a package containing a few modules and one file where I
> created the main() function.
> if needed and suggested by experts I may as well put it in my
> __init__.py file of the package.
No, usually the main function is outside the package. The package is a 
library, and main() *uses* that library, as a client.

> coming back to the point.  where do I put the following code
> if __name__ == "__main__":
>   main()
I would say, "In the main script, obviously :)" But since you're asking it 
may not be so obvious...
It appears that your main script is exec.py - so there should be it.
I suppose you run your application this way:
exec.py -some -options file.ext
(perhaps a bare exec.py is enough) so using the idiom above, inside exec.py 
you can detect when someone is running it as a script.

> I have 5 modules in my package each doing a specific task.
> and a file that contains the main() function.  the 5 modules and the
> exec.py file all are in the same package.  if it is a wrong practice
> please correct me.
exec.py is not a good name, since this is the "public" entry point to your 
application, and should be more meaningful.
Usually it is not inside the package, just uses it.
I suggest you look into other Python applications, to see how they are 
layered.

-- 
Gabriel Genellina 




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Jan 26 03:50:14 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 26 Jan 2007 09:50:14 +0100
Subject: stop script w/o exiting interpreter
In-Reply-To: <Lyauh.8689$QE6.2176@trnddc02>
References: <Lyauh.8689$QE6.2176@trnddc02>
Message-ID: <45b9c0bc$0$29540$426a74cc@news.free.fr>

Alan Isaac a ?crit :
> I'm fairly new to Python and I've lately been running a script at
> the interpreter while working on it.  Sometimes I only want to
> run the first quarter or half etc.  What is the "good" way to do this?

If the point is to debug your script, then import pdb; pdb.set_trace()

> Possible ugly hacks include:
> 
> - stick an undefined name at the desired stop point
> - comment out the last half
> 
> I do not like these and assume that I have overlooked the obvious.

If you have much of your code in functions/classes etc, and the bare 
minimum[1] at the top level, then you can launch a Python shell, import 
your module, and test functions as you wish...

[1]:

import XXX
import YYY

# lots of functions/classes etc

def main(argv):
   # what would have been at the top level

if __name__ == __main__:
   import sys
   sys.exit(main(sys.argv))


From tsuraan at gmail.com  Mon Jan  8 11:55:24 2007
From: tsuraan at gmail.com (tsuraan)
Date: Mon, 8 Jan 2007 10:55:24 -0600
Subject: Suitability for long-running text processing?
In-Reply-To: <c2701f5c0701080835o7013c43fm3e71e9b7d1a11329@mail.gmail.com>
References: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>
	<c2701f5c0701080801w4d3c378elf901db19610a2e9e@mail.gmail.com>
	<84fb38e30701080813k1be616fch6d01922fb7a92fc5@mail.gmail.com>
	<c2701f5c0701080835o7013c43fm3e71e9b7d1a11329@mail.gmail.com>
Message-ID: <84fb38e30701080855x4cc809ddh7c0cf2d2e0e83520@mail.gmail.com>

> $ python
> Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02)
> [GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> # Python is using 2.7 MiB
> ... a = ['1234' for i in xrange(10 << 20)]
> >>> # Python is using 42.9 MiB
> ... del a
> >>> # Python is using 2.9 MiB
>
> With 10,485,760 strings of 4 chars, it still works as expected.


Have you tried running the code I posted?  Is there any explanation as to
why the code I posted fails to ever be cleaned up?
In your specific example, you have a huge array of pointers to a single
string.  Try doing "a[0] is a[10000]".  You'll get True.  Try "a[0] is
'1'+'2'+'3'+'4'".  You'll get False.  Every element of a is a pointer to the
exact same string.  When you delete a, you're getting rid of a huge array of
pointers, but probably not actually losing the four-byte (plus gc overhead)
string '1234'.

So, does anybody know how to get python to free up _all_ of its allocated
strings?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070108/fc80606b/attachment.html>

From will at willmcgugan.com  Wed Jan 17 07:41:02 2007
From: will at willmcgugan.com (Will McGugan)
Date: 17 Jan 2007 04:41:02 -0800
Subject: generate tuples from sequence
Message-ID: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>

Hi,

I'd like a generator that takes a sequence and yields tuples containing
n items of the sqeuence, but ignoring the 'odd' items. For example

take_group(range(9), 3) -> (0,1,2) (3,4,5) (6,7,8)

This is what I came up with..

    def take_group(gen, count):
        i=iter(gen)
        while True:
            yield tuple([i.next() for _ in xrange(count)])

Is this the most efficient solution?

Regards,

Will McGugan
--
http://www.willmcgugan.com



From jm.suresh at gmail.com  Thu Jan 11 09:06:39 2007
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 11 Jan 2007 06:06:39 -0800
Subject: dot operations
In-Reply-To: <1168522658.128216.199310@77g2000hsv.googlegroups.com>
References: <1168511200.252193.132340@p59g2000hsd.googlegroups.com>
	<1168522658.128216.199310@77g2000hsv.googlegroups.com>
Message-ID: <1168524399.307074.192080@i56g2000hsf.googlegroups.com>


Paddy wrote:
> jm.suresh at no.spam.gmail.com wrote:
> > Hi,
> >  Frequently I get to do like this:
> > a = (1, 2, 3, 4) # some dummy values
> > b = (4, 3, 2, 1)
> > import operator
> > c = map(operator.add, a, b)
> >
> > I am finding the last line not very readable especially when I combine
> > couple of such operations into one line. Is it possible to overload
> > operators, so that, I can use .+ for element wise addition, as,
> > c = a .+ b
> > which is much more readable.
> >
> > Similarly, I want to use .- , .*, ./   . Is it possible to do?
> >
> > thanks.
> >
> > -
> > Suresh
>
> List comprehensions?
>
> >>> a = (1, 2, 3, 4)
> >>> b = (4, 3, 2, 1)
> >>> import operator
> >>> c = map(operator.add, a, b)
> >>> c
> [5, 5, 5, 5]
> >>> c1 = [a1+b1 for a1,b1 in zip(a,b)]
> >>> c1
> [5, 5, 5, 5]
> >>>
>

I just found this from :
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/384122

class Infix(object):
    def __init__(self, function):
        self.function = function
    def __ror__(self, other):
        return Infix(lambda x, self=self, other=other:
self.function(other, x))
    def __or__(self, other):
        return self.function(other)
    def __rlshift__(self, other):
        return Infix(lambda x, self=self, other=other:
self.function(other, x))
    def __rshift__(self, other):
        return self.function(other)
    def __call__(self, value1, value2):
        return self.function(value1, value2)

import operator
dotplus = Infix(lambda x,y: map(operator.add, x, y))

a = range(4)
b = range(4)

c = a |dotplus| b

> 
> - Paddy.



From gagsl-py at yahoo.com.ar  Mon Jan  8 19:46:06 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 08 Jan 2007 21:46:06 -0300
Subject: Network failure when using urllib2
In-Reply-To: <1168302603.565442.113760@v33g2000cwv.googlegroups.com>
References: <1168292352.349983.139260@i15g2000cwa.googlegroups.com>
	<1168301738.984509.3030@38g2000cwa.googlegroups.com>
	<1168302603.565442.113760@v33g2000cwv.googlegroups.com>
Message-ID: <7.0.1.0.0.20070108214407.03288130@yahoo.com.ar>

At Monday 8/1/2007 21:30, jdvolz at gmail.com wrote:

>I am fetching different web pages (never the same one) from a web
>server.  Does that make a difference with them trying to block me?
>Also, if it was only that site blocking me, then why does the internet
>not work in other programs when this happens in the script.  It is
>almost like something is seeing a lot of traffic from my computer, and
>cutting it off thinking it is some kind of virus or worm.  I am
>starting to suspect my firewall.  Anyone else have this happen?

Perhaps you're not closing connections once finished?
Try netstat -an from the command line and see how many open 
connections you have.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From fsckedagain at gmail.com  Thu Jan  4 12:14:29 2007
From: fsckedagain at gmail.com (fscked)
Date: 4 Jan 2007 09:14:29 -0800
Subject: minidom utf-8 encoding
In-Reply-To: <459D2DEF.2060508@v.loewis.de>
References: <1167868380.481121.154880@42g2000cwt.googlegroups.com>
	<459cbbce$0$15834$9b622d9e@news.freenet.de>
	<1167927887.745869.18260@q40g2000cwq.googlegroups.com>
	<459D2DEF.2060508@v.loewis.de>
Message-ID: <1167930869.836046.86840@42g2000cwt.googlegroups.com>


Martin v. L?wis wrote:
<...snip...>

> I find that hard to believe. There is no code in Python that does
> removal of characters, and I can't see any other reason why it gets
> removed.
>
> OTOH, what I do get when writing to a file is a UnicodeError, when
> it tries to convert the Unicode string that toxml gives to a byte
> string.
>
> So I recommend you pass encoding="utf-8" to the toprettyxml invocation
> also.
>
> Regards,
> Martin

OK, now I am really confused. After trying all variations of opening
and writing and encoding and all the other voodoo I can find on the web
for hours, I decide to put the script back to how it was when it did
everything but remove the unicode characters.

And now it just works...

I hate it when that happens. In case you are wondering here is the code
that caused me all this (seemingly odd) pain:

import csv
import codecs
from xml.dom.minidom import Document

out = open("test.xml", "w")

# Create the minidom document
doc = Document()

# Create the <boxes> base element
boxes = doc.createElement("boxes")
myfile = open('ClientsXMLUpdate.txt')
csvreader = csv.reader(myfile)
for row in csvreader:
    mainbox = doc.createElement("box")
    doc.appendChild(boxes)
    r2 = csv.reader(myfile)
    b = r2.next()
    mainbox.setAttribute("city", b[10])
    mainbox.setAttribute("country", b[9])
    mainbox.setAttribute("phone", b[8])
    mainbox.setAttribute("address", b[7])
    mainbox.setAttribute("name", b[6])
    mainbox.setAttribute("pl_heartbeat", b[5])
    mainbox.setAttribute("sw_ver", b[4])
    mainbox.setAttribute("hw_ver", b[3])
    mainbox.setAttribute("date_activated", b[2])
    mainbox.setAttribute("mac_address", b[1])
    mainbox.setAttribute("boxid", b[0])
    boxes.appendChild(mainbox)


# Print our newly created XML
out.write( doc.toprettyxml ())


And it just works...



From michele.petrazzoDELETE at DELETEunipex.it  Tue Jan 23 03:58:57 2007
From: michele.petrazzoDELETE at DELETEunipex.it (Michele Petrazzo)
Date: Tue, 23 Jan 2007 08:58:57 GMT
Subject: beep or sound playing under linux
In-Reply-To: <pFath.50034$oA1.40310@newsfe19.lga>
References: <pFath.50034$oA1.40310@newsfe19.lga>
Message-ID: <l7kth.3862$qN4.109320@twister1.libero.it>

hg wrote:
> Hi,
> 
> Is there a way to do that ?

I can do it, into my debian, with a:

michele:~$ echo -e "\007" >/dev/tty

It's very simple to reproduce it with python and os.system or subprocess.

Michele


From nick at craig-wood.com  Mon Jan 22 04:30:09 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 22 Jan 2007 03:30:09 -0600
Subject: mmap caching
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>
	<slrner7h27.d8g.nick@irishsea.home.craig-wood.com>
	<1169415139.515834.233700@a75g2000cwd.googlegroups.com>
Message-ID: <slrner8v8t.l0v.nick@irishsea.home.craig-wood.com>

George Sakkis <george.sakkis at gmail.com> wrote:
>  The file is written once and then opened as read-only, there's no
>  flushing. So if caching is completely up to the OS, I take it that my
>  options are either (1) modify my algorithms so that they work in
>  fixed-size batches instead of arbitrarily long sequences or (2)
>  implement my own memory-mapping scheme to fit my algorithms. I guess
>  (1) would be the less trouble overall, or is there a way to give a hint
>  to the OS on how large cache can it use ?

The above behaviour isn't as expected.  So either there is something
going on in your program that we don't know about or there is a bug
somewhere, either in the OS or in python.

Can you make a short program to replicate the problem?  That will help
narrow down the problem.

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


From greg at cosc.canterbury.ac.nz  Fri Jan 26 22:26:48 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sat, 27 Jan 2007 16:26:48 +1300
Subject: ANN: Plex 1.1.5
Message-ID: <mailman.3232.1169916877.32031.python-announce-list@python.org>

I have released a small update to Plex to fix the
problem of assignment to None causing syntax warnings
or errors in Python 2.3 and later.

What is Plex?

Plex is a Python module for lexical analysis that
provides similar functionality to Lex and Flex.

--
Greg


From steve at REMOVE.THIS.cybersource.com.au  Wed Jan 24 16:31:29 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 25 Jan 2007 08:31:29 +1100
Subject: Static variables
References: <ep8gkl$g7v$3@news.in.tum.de>
Message-ID: <pan.2007.01.24.21.31.29.172455@REMOVE.THIS.cybersource.com.au>

On Wed, 24 Jan 2007 21:48:38 +0100, Florian Lindner wrote:

> Hello,
> does python have static variables? I mean function-local variables that keep
> their state between invocations of the function.

There are two ways of doing that (that I know of).

The simplest method is by having a mutable default argument. Here's an
example:

def foo(x, _history=[]):
    print _history, x
    _history.append(x)

>>> foo(2)
[] 2
>>> foo(3)
[2] 3
>>> foo(5)
[2, 3] 5


Another method is to add an attribute to the function after you've created
it:

def foo(x):
    print foo.last, x
    foo.last = x

foo.last = None


>>> foo(3)
None 3
>>> foo(6)
3 6
>>> foo(2)
6 2


But the most powerful method is using generators, which remember their
entire internal state between calls. Here's a simple example, one that
returns the integers 0, 1, 3, 6, 10, ...  

def number_series():
    increment = 1
    n = 0
    while True:
        yield n  # instead of return
        n += increment
        increment += 1


Notice that in this case there is no exit to the function: it loops
forever because the series goes on for ever. If you want to exit the
generator, just use a plain return statement (don't return anything), or
just exit the loop and fall off the end of the function.

This is how we might use it:

Create an iterator object from the generator function, and print the first
six values:

>>> gen = number_series()
>>> for i in range(6): print gen.next()
...
0
1
3
6
10
15

Sum the values from the current point up to 100:

>>> s = 0
>>> n = gen.next()
>>> n
21
>>> for x in gen:
...     if x >= 100:
...             break
...     n += x
...
>>> n
420

Reset the iterator to the start:

>>> gen = number_series()

For generators that terminate, you can get all the values in one go with
this:

everything = list(gen)  # or everything = list(number_series())

but don't try this on my example, because it doesn't terminate!


-- 
Steven.



From carsten at uniqsys.com  Fri Jan 12 15:22:01 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 12 Jan 2007 15:22:01 -0500
Subject: dynamic argument name for functions
In-Reply-To: <e04d2e90701121217w32829ef9g4bd0af00b643dc2c@mail.gmail.com>
References: <e04d2e90701121217w32829ef9g4bd0af00b643dc2c@mail.gmail.com>
Message-ID: <1168633321.3382.92.camel@dot.uniqsys.com>

On Fri, 2007-01-12 at 12:17 -0800, mark wrote:
> I want to pass a value to an argument of a function. The argument name
> is dynamic and is stored in a 
> variable. How do I call the function using with arg_name and value as
> the parameters.
> thanks
> mark
> 
> For ex:
> def function(arg1='None', arg2='None', arg3='None'):
>       print arg1
>       print arg2
>       print arg3
> 
> 
> arg_name = 'arg1'
> arg_value = 'i am passing a value to argument 1'
> function(???????)

function(**{arg_name: arg_value})

-Carsten




From bdesth.quelquechose at free.quelquepart.fr  Fri Jan 12 18:00:20 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 13 Jan 2007 00:00:20 +0100
Subject: Tools Designing large/complicated applications
In-Reply-To: <mailman.2615.1168560567.32031.python-list@python.org>
References: <mailman.2615.1168560567.32031.python-list@python.org>
Message-ID: <45a80c9e$0$308$426a74cc@news.free.fr>

Carl J. Van Arsdall a ?crit :
> For those of you that work on larger applications but still code in 
> python... do your development teams use any tools to facilitate the 
> design? 

Yes : coffee, beer, pizzas, cigarettes, paper napkins, pen, and a good wiki.

> (i'm not asking about editors here, i'm really asking about 
> software design tools)

<aol />

> Thanks!

HTH


From ktenney at gmail.com  Sun Jan 28 09:28:00 2007
From: ktenney at gmail.com (Kent  Tenney)
Date: 28 Jan 2007 06:28:00 -0800
Subject: Problems with ElementTree and ProcessingInstruction
Message-ID: <1169994480.424321.51600@m58g2000cwm.googlegroups.com>

Howdy,

I want to generate the following file;

<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet mystyle?>
<leo_file>stuff</leo_file>

How should I be doing this?

As far as I can tell, ElementTree() requires everything
to be inside the root element (leo_file)

Thanks,
Kent



From bthom at cs.hmc.edu  Fri Jan  5 03:40:44 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Fri, 05 Jan 2007 00:40:44 -0800
Subject: checking one's type
Message-ID: <E90C7F6E-5200-4553-9C39-8941999588B2@cs.hmc.edu>

Hi,

I've been using the following hack to determine if a type is  
acceptable and I suspect there is a better way to do it:

e.g.

if type(s) == type("") :
    print "okay, i'm happy you're a string"

If anyone knows a better way, I'm all ears.

Thanks,

--b 


From fdelente at mail.cpod.fr  Sat Jan 27 03:59:03 2007
From: fdelente at mail.cpod.fr (Fabrice DELENTE)
Date: 27 Jan 2007 08:59:03 GMT
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
	<45ba50c7$0$31432$426a74cc@news.free.fr>
	<slrnerks72.jc.horpner@FIAD06.norwich.edu>
	<12rl5mq4nnqoea0@corp.supernews.com>
	<45bafda7$0$2417$426a74cc@news.free.fr>
	<45bb02bf$0$26684$426a34cc@news.free.fr>
	<mailman.3227.1169886865.32031.python-list@python.org>
Message-ID: <45bb1457$0$25908$426a34cc@news.free.fr>

> Try "export LINES COLUMNS" to set them as environment variables.

Thanks, it works. Didn't know that.

-- 
Fabrice DELENTE


From cyberco at gmail.com  Thu Jan 11 03:59:31 2007
From: cyberco at gmail.com (cyberco)
Date: 11 Jan 2007 00:59:31 -0800
Subject: The Python Papers: Submit your Quotes
In-Reply-To: <1168492949.830615.131350@o58g2000hsb.googlegroups.com>
References: <1168492949.830615.131350@o58g2000hsb.googlegroups.com>
Message-ID: <1168505970.905216.38400@77g2000hsv.googlegroups.com>

"Like silence in music, whitespace is where Python Power shows"

"The odd thing is that Python results in what I call YoYo-code. After
writing some code I always discover a shorter, more elegant and more
readable way of doing the same thing in Python. The same happens after
adding more functionality. This goes on indefinitely, resulting in a
piece of code whose length YoYo's over time"

"Python's power is that it is fitted for both simple and complex tasks.
You're not bothered with the restrictions that are only relevant when
building complex systems if you just want to do something simple" -
Berco Beute

"Jack of all trades, master as well"

    - Berco Beute



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Jan 12 20:00:49 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 13 Jan 2007 02:00:49 +0100
Subject: modules...n methods
References: <1168620496.520506.296330@q2g2000cwa.googlegroups.com>
	<50pst9F1h5hj5U1@mid.individual.net>
	<mailman.2673.1168634470.32031.python-list@python.org>
Message-ID: <50qpa1F1h80tbU1@mid.individual.net>

belinda thom wrote:

> This becomes a lot easier if you use IPython (which embellishes
> the python shell in many useful ways). For instance, I did a "dir
> (__builtins__)" to find out what some of the builtin functions
> were.

Sure.

> HTH

I'm sorry, it doesn't help me. 

And *please* don't send mail copies to me.

Regards,


Bj?rn

-- 
BOFH excuse #14:

sounds like a Windows problem, try calling Microsoft support



From http  Wed Jan 24 22:11:59 2007
From: http (Paul Rubin)
Date: 24 Jan 2007 19:11:59 -0800
Subject: My Tkinter Threading nightmare
References: <1169693266.209082.323310@a75g2000cwd.googlegroups.com>
Message-ID: <7x1wljajgg.fsf@ruckus.brouhaha.com>

half.italian at gmail.com writes:
> and setup the callback to kill the operation and then the window when
> the user clicks on the X of the progress window.  I've implemented this
> in my code, but clicking on the X does nothing until I kill the main
> thread (i think), and then my callback is run.  I've also had problems
> in the past of the gui not refreshing properly, which leads me to
> believe that both of these are thread related.  Any help would be
> immensely appreciated.

That was more code than I was willing to sit and read, but basically
the tkinter thread blocks unless there's tkinter events.  The usual
trick for what you're trying to do is to set up a tk.after event to
run every 20 msec or so.  That can check for commands on a queue to
launch operations, kill windows, or whatever.  In your Window class
you'd have something like (this is pseudocode, I don't remember the
exact params and args off the top of my head so you'll have to check
them):

      def __init__(self, ...):
         ...
         self.after(20, self.idle)

      def idle(self):
         # read and execute any commands waiting on the queue
         while True:
            try:
               func, args, kw = self.cmd_queue.get(block=False)
            except QueueEmpty:
               return
            func (*args, **kw)

cmd_queue is a queue that you set up ahead of time, and you use it to
send commands into your gui thread from other threads, such as window
kill.  Don't call gui functions directly as tkinter is not
thread-safe.


From pwatson at redlinepy.com  Wed Jan  3 14:24:17 2007
From: pwatson at redlinepy.com (Paul Watson)
Date: Wed, 03 Jan 2007 13:24:17 -0600
Subject: Cannot build 2.5 on FC6 x86
Message-ID: <502e72F1eh7ngU1@mid.individual.net>

./configure
make
make test

The result appears to hang after the test_tkl... line.  I had to kill 
the 'make test' process which terminated it.  Any suggestions?


280 tests OK.
4 tests failed:
     test_optparse test_socket test_socket_ssl test_urllib2
35 tests skipped:
     test_aepack test_al test_applesingle test_bsddb185 test_bsddb3
     test_cd test_cl test_codecmaps_cn test_codecmaps_hk
     test_codecmaps_jp test_codecmaps_kr test_codecmaps_tw test_curses
     test_gl test_imgfile test_linuxaudiodev test_logging test_macfs
     test_macostools test_nis test_normalization test_ossaudiodev
     test_pep277 test_plistlib test_scriptpackages test_socketserver
     test_startfile test_sunaudiodev test_tcl test_timeout
     test_urllib2net test_urllibnet test_winreg test_winsound
     test_zipfile64
2 skips unexpected on linux2:
     test_tcl test_logging

make: *** [test] Terminated
Terminated


From Thomas.Ploch at gmx.net  Fri Jan 12 15:00:41 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Fri, 12 Jan 2007 21:00:41 +0100
Subject: Rational Numbers
In-Reply-To: <8c7f10c60701121134q35bf7c27h7c4b5cf1dcfe44ca@mail.gmail.com>
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>	<mailman.2597.1168550439.32031.python-list@python.org>	<eo6ia5$5bt$1@gemini.csx.cam.ac.uk>	<mailman.2643.1168611301.32031.python-list@python.org>	<eo883j$l9d$1@gemini.csx.cam.ac.uk>	<mailman.2648.1168616202.32031.python-list@python.org>	<eo8b1r$r9c$1@gemini.csx.cam.ac.uk>
	<8c7f10c60701121134q35bf7c27h7c4b5cf1dcfe44ca@mail.gmail.com>
Message-ID: <45A7E8E9.8060105@gmx.net>

Simon Brunning schrieb:
> On 12 Jan 2007 15:55:39 GMT, Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
>> In article <mailman.2648.1168616202.32031.python-list at python.org>,
>> Carsten Haese <carsten at uniqsys.com> writes:
>> |> but there are more use
>> |> cases for Decimal than for Rational.
>>
>> That is dubious, but let's not start that one again.
> 
> Decimals are good for holding financial values. There's a whole lot of
> software out there that deals with money.
> 

Do not forget:

- Time
- Personal Data (like birthdays, age)

Thomas


From fsckedagain at gmail.com  Thu Jan  4 11:24:49 2007
From: fsckedagain at gmail.com (fscked)
Date: 4 Jan 2007 08:24:49 -0800
Subject: minidom utf-8 encoding
In-Reply-To: <459cbbce$0$15834$9b622d9e@news.freenet.de>
References: <1167868380.481121.154880@42g2000cwt.googlegroups.com>
	<459cbbce$0$15834$9b622d9e@news.freenet.de>
Message-ID: <1167927887.745869.18260@q40g2000cwq.googlegroups.com>


Martin v. L?wis wrote:
> fscked schrieb:
> > Hi guys/gals.
> >
> > I am trying to write and xml file from data parsed from a csv.
> >
> > I can get everything to work except that I cannot get minidom to do -->
> > ? which needless to say is driving me nuts.
> >
> > Any suggestions?
>
> Works fine for me:
>
> py> d = minidom.Document()
> py> r = d.createElement("root")
> py> r.appendChild(d.createTextNode(u"\xf6"))
> <DOM Text node "\xf6">
> py> d.appendChild(r)
> <DOM Element: root at -0x482ab614>
> py> d.toxml()
> u'<?xml version="1.0" ?>\n<root>\xf6</root>'
> py> print d.toxml()
> <?xml version="1.0" ?>
> <root>?</root>
>
> Regards,
> Martin

Well, let me clarify. If I just print it to the screen/console it works
fine, but when I do:

out.write( doc.toprettyxml())

it just removes the character that would be the "?".

I can post the code if anyone wants to see it, but it is fairly
straightforward.



From mail at microcorp.co.za  Wed Jan 10 00:31:36 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 10 Jan 2007 07:31:36 +0200
Subject: Colons, indentation and reformatting. (2)
References: <1168323368.592642.314130@i15g2000cwa.googlegroups.com><45a33a24$0$7658$4c368faf@roadrunner.com><1168329449.577659.214890@s34g2000cwa.googlegroups.com>
	<slrneq6uv2.tcj.grahn+nntp@frailea.sa.invalid>
Message-ID: <019c01c7348c$1b90f8e0$03000080@hendrik>


 "Jorgen Grahn" <grahn+nntp at snipabacken.dyndns.org>wrote:

> On 8 Jan 2007 23:57:29 -0800, Paddy <paddy3118 at netscape.net> wrote:
> >
> > OK, whilst colons are not sufficient to re-format a completely
> > mis-indented file. I'm thinking that they are sufficient for
> > reformatting most pasted code blocks when refactoring say?
> 
> Let's put it this way: if the formatter can assume the original code is
> valid (i.e. has the intended indentation) then it can do all kinds of nifty
> things to it.

This is true - and I think it will only fail if the "entry" point in the pasted
code is "further to the right" than where it has to fit in to the original
code - i.e. if you "run out of space" to the left.  - but in that case
you really are hacking, and you are in urgent need of some slashing...

- Hendrik



From nocl123 at gmail.com  Thu Jan 11 12:09:30 2007
From: nocl123 at gmail.com (nic)
Date: 11 Jan 2007 09:09:30 -0800
Subject: os.popen() not executing command on windows xp
References: <1168508553.151827.261420@k58g2000hse.googlegroups.com>
	<1168509560.119819.78470@o58g2000hsb.googlegroups.com>
Message-ID: <1168535370.211599.265250@p59g2000hsd.googlegroups.com>

Justin Ezequiel wrote:
> > import os
> > a = os.popen('"c:\Program Files\Grisoft\AVG Free\avgscan.exe"
> > "c:\program files\temp1\test1.txt"')
> > print a.read()
> >
>
> use raw strings
>
> e.g., instead of '"c:...\avgscan...'
> use r'"c:...\avgscan...'
>
> http://www.ferg.org/projects/python_gotchas.html#contents_item_2

Sorry I initally had retyped the code to replace some variables to make
it more clear, I already had them as raw strings:

import os
pstr = r'"c:\Program Files\Grisoft\AVG Free\avgscan.exe" "c:\program
files\temp1\test1.txt"'
a = os.popen(pstr)
print a.read()

I've confirmed the string I'm inputting to os.popen is EXACTLY the same
as the one I can successfully execute manually in command prompt, so
when I go:
print pstr, it yields:
"c:\Program Files\Grisoft\AVG Free\avgscan.exe" "c:\program
files\temp1\test1.txt"

The problem remains popen won't execute this line as it does when
inputted manually to command prompt.



From laurent.pointal at limsi.fr  Tue Jan 23 03:53:55 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 23 Jan 2007 09:53:55 +0100
Subject: Removing outdated files
In-Reply-To: <45b59949@griseus.its.uu.se>
References: <45b59949@griseus.its.uu.se>
Message-ID: <ep4jb5$j5m$2@upsn250.cri.u-psud.fr>

Jan Danielsson a ?crit :
> Hello all,
> 
>    I have a backup system which produces files using the following pattern:
...
> 
>    Obviously, I have little need for *all* those files. What I want to
> do is to delete old files according to this pattern:
> 
>    - Keep all backup files which are two weeks, or less, old
>    - If backups are more than two weeks old, then keep only the latest
> one for each week.
>    - If backups are more than two months old, then keep only the latest
> one for each month.
>    - If backups are more than two years old, then keep only the latest
> one for each year.

You should take a look at snapy, AFAIR it does things like this to
manage snapshot backups (with cp [+rsync] [+ssh]).

http://www.flibuste.net/libre/snapy/



From yinglcs at gmail.com  Mon Jan 22 17:05:16 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: 22 Jan 2007 14:05:16 -0800
Subject: How to use time.clock() function in python
Message-ID: <1169503516.425217.218790@q2g2000cwa.googlegroups.com>

Hi,

I am following this python example trying to time how long does an
operation takes, like this:

My question is why the content of the file (dataFile) is just '0.0'?
I have tried "print >>dataFile, timeTaken" or "print >>dataFile,str(
timeTaken)", but gives me 0.0.
Please tell me what am I missing?


        t1 = time.clock()
        os.system(cmd)

        outputFile = str(i) + ".png"

        t2 = time.clock()

        timeTaken = t2 - t1
        allTimeTaken += timeTaken
        print >>dataFile, timeTaken



From paul at boddie.org.uk  Fri Jan 12 07:13:33 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 12 Jan 2007 04:13:33 -0800
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
	<1168597288.571937.176430@s34g2000cwa.googlegroups.com>
	<eo7sj1$vn6$1@news.albasani.net>
Message-ID: <1168604013.854051.61940@51g2000cwl.googlegroups.com>

robert wrote:
> Paul Boddie wrote:
> >
> > [1] http://www.python.org/pypi/parallel
>
> I'd be interested in an overview.

I think we've briefly discussed the above solution before, and I don't
think you're too enthusiastic about anything using interprocess
communication, which is what the above solution uses. Moreover, it's
intended as a threading replacement for SMP/multicore architectures
where one actually gets parallel execution (since it uses processes).

> For ease of use a major criterion for me would be a pure python
> solution, which also does the job of starting and controlling the
> other process(es) automatically right (by default) on common
> platforms.
> Which of the existing (RPC) solutions are that nice?

Many people have nice things to say about Pyro, and there seem to be
various modules attempting parallel processing, or at least some kind
of job control, using that technology. See Konrad Hinsen's
ScientificPython solution for an example of this - I'm sure I've seen
others, too.

Paul



From mhellwig at xs4all.nl  Fri Jan 19 16:31:27 2007
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Fri, 19 Jan 2007 22:31:27 +0100
Subject: How to comment code?
Message-ID: <45b13876$0$323$e4fe514c@news.xs4all.nl>

Hi all,

I've been toying with python for about two years now. Not every day, 
just when I encounter something in my job (sysadmin) repetitively dull.
The amazing thing is that like any other language (natural or not) 
learning it more gives you power to express your thoughts better and 
create something from nothing, for me this is something I can only 
compare to freedom.

However since I'm learning more of python I've struggled with 
commenting, how should I've comment my code? I'm not talking about the 
style but more on the concept itself, things that where a couple of 
month ago a bunch of monkey poop is now as easy as reading a comic.

I always give a brief description on what the code is supposed to do and 
  I suppose that any serious coder knows way more then me about 
programming so I don't bother to comment that much since it mostly (in 
my eyes) just clutters up the code and makes it actually harder to read.

Though this makes me uncomfortably, commenting so little, I was thinking 
that perhaps something like doctest (I'm not so much into unit testing 
or the equivalents at this moment) has the side affect to make my code 
more understandable and readable. Any practical experience you'd like to 
share with me, any other comments are welcome too of course :-)

Thanks.

-- 
mph


From danb_83 at yahoo.com  Mon Jan  8 19:19:05 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 8 Jan 2007 16:19:05 -0800
Subject: Maths error
In-Reply-To: <mailman.2448.1168293199.32031.python-list@python.org>
References: <mailman.2448.1168293199.32031.python-list@python.org>
Message-ID: <1168301945.854331.95920@s80g2000cwa.googlegroups.com>

On Jan 8, 3:30 pm, Rory Campbell-Lange <r... at campbell-lange.net> wrote:
> >>> (1.0/10.0)  + (2.0/10.0) + (3.0/10.0)
> 0.60000000000000009
> >>> 6.0/10.0
> 0.59999999999999998
>
> Is using the decimal module the best way around this? (I'm expecting the first
> sum to match the second).

Probably not.  Decimal arithmetic is NOT a cure-all for floating-point
arithmetic errors.

>>> Decimal(1) / Decimal(3) * Decimal(3)
Decimal("0.9999999999999999999999999999")
>>> Decimal(2).sqrt() ** 2
Decimal("1.999999999999999999999999999")

> It seem anachronistic that decimal takes strings as
> input, though.

How else would you distinguish Decimal('0.1') from
Decimal('0.1000000000000000055511151231257827021181583404541015625')?



From kmsmgill at gmail.com  Fri Jan 19 08:48:33 2007
From: kmsmgill at gmail.com (kmsmgill at gmail.com)
Date: 19 Jan 2007 05:48:33 -0800
Subject: how to mimik a main() function to start a program with entry
	point?
References: <mailman.2897.1169213439.32031.python-list@python.org>
Message-ID: <1169214513.910651.29280@l53g2000cwa.googlegroups.com>

def main():
    print "Hello"

if __name__ == "__main__":
    main()

Simply verify __name__ and run any function from there. This will cause
main() to be run if the script is run directly. I haven't used py2exe,
so I'm not sure if it still applies.

--Kevin




krishnakant Mane wrote:
> hello all.
> I have one simple query and may be that's to stupid to answer but I am
> not finding the answer any ways.
> I have a set of modules in my package and out if which one is my
> actual starting point to my entire program.  say for example I have an
> entire database application ready and I want a main (as in java or c)
> to initiate the program and may be bring up a login screen and then
> pass the control on to the main window.
> if I am giving raw source code that is easy because I will tell user
> to run the command ./xyz.py which has that function.
> but if I freze it into an executable with py2exe for example , how do
> I solve this problem?
> thanks.
> Krishnakant.



From no-spam at no-spam-no-spam.invalid  Thu Jan 11 05:41:33 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 11 Jan 2007 11:41:33 +0100
Subject: dot operations
In-Reply-To: <1168511200.252193.132340@p59g2000hsd.googlegroups.com>
References: <1168511200.252193.132340@p59g2000hsd.googlegroups.com>
Message-ID: <eo548v$mr4$1@news.albasani.net>

jm.suresh at no.spam.gmail.com wrote:
> Hi,
>  Frequently I get to do like this:
> a = (1, 2, 3, 4) # some dummy values
> b = (4, 3, 2, 1)
> import operator
> c = map(operator.add, a, b)
> 
> I am finding the last line not very readable especially when I combine
> couple of such operations into one line. Is it possible to overload
> operators, so that, I can use .+ for element wise addition, as,
> c = a .+ b
> which is much more readable.
> 
> Similarly, I want to use .- , .*, ./   . Is it possible to do?

import numpy

You'll not even need dots


From news at grauer-online.de  Fri Jan  5 09:30:10 2007
From: news at grauer-online.de (Uwe Grauer)
Date: Fri, 05 Jan 2007 15:30:10 +0100
Subject: C/C++, Perl, etc. to Python converter
In-Reply-To: <G3Qmh.94$9v1.124@nntpserver.swip.net>
References: <G3Qmh.94$9v1.124@nntpserver.swip.net>
Message-ID: <459E60F2.4000600@grauer-online.de>

mm wrote:
> 
> Is there a Perl to Python converter?
> Or in general: a XY to Python converter?
> 
> Is see, that Python is much better then Perl anyway.
> But for beginners, they whant to konw how is this done with Python etc.
> 
> Sure, there are some docus out there in the internet. But a converter?

Maybe this can help in converting from prel to python:
http://www.crazy-compilers.com/bridgekeeper/

Uwe


From bj_666 at gmx.net  Wed Jan 10 02:55:30 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 10 Jan 2007 08:55:30 +0100
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5 (Final report)
References: <2BBAEE949D384D40A2B851287ADB6A4304595A6D@eugsrv400.psc.pscnet.com>
	<7.0.1.0.0.20070109203637.0422acb8@yahoo.com.ar>
	<mailman.2514.1168408718.32031.python-list@python.org>
Message-ID: <pan.2007.01.10.07.55.30.430946@gmx.net>

In <mailman.2514.1168408718.32031.python-list at python.org>, Julio Biason
wrote:

> If I use a file() in a for, how to I explicitely close the file?
> 
> <code>
> for line in file('contents'):
>    print line
> </code>
> 
> Would this work like the new 'with' statement or it will only be closed
> when the GC finds it?

Only when the GC destroys it.

Ciao,
	Marc 'BlackJack' Rintsch


From frank at chagford.com  Sun Jan  7 04:33:32 2007
From: frank at chagford.com (Frank Millman)
Date: 7 Jan 2007 01:33:32 -0800
Subject: How to invoke parent's method?
In-Reply-To: <1168138626.574514.102060@i15g2000cwa.googlegroups.com>
References: <1168138626.574514.102060@i15g2000cwa.googlegroups.com>
Message-ID: <1168162412.253449.296520@38g2000cwa.googlegroups.com>


many_years_after wrote:
> Hi, pythoners:
>
>      My wxPython program includes  a panel whose parent is a frame. The
> panel has a button. When I click the button , I want to let the frame
> destroy. How to implement it? Could the panel invoke the frame's
> method?
> Thanks.

Have a look at the following program -

----------------------------------------------------------------------

class MyFrame(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title)
        MyPanel(self)

class MyPanel(wx.Panel):
    def __init__(self,frame):
        wx.Panel.__init__(self,frame,-1)
        self.frame = frame
        b = wx.Button(self,-1,'Close')
        b.Bind(wx.EVT_BUTTON,self.onClose,id=b.GetId())

    def onClose(self,evt):
        self.frame.Close()
        evt.Skip()

class MyApp(wx.App):
    def OnInit(self):
        frame = MyFrame(None, -1, "Test")
        frame.Show(True)
        self.SetTopWindow(frame)
        return True

app = MyApp(0)     # Create an instance of the application class
app.MainLoop()     # Tell it to start processing events

----------------------------------------------------------------------

The essential point is that you save a reference to the frame when you
create the panel. Then when the button is clicked you can use the
reference to call the frame's Close method.

HTH

Frank Millman



From codecraig at gmail.com  Tue Jan  9 10:01:31 2007
From: codecraig at gmail.com (abcd)
Date: 9 Jan 2007 07:01:31 -0800
Subject: Determine an object is a subclass of another
In-Reply-To: <1168353975.285391.212350@m30g2000cwm.googlegroups.com>
References: <1168353205.066357.39530@42g2000cwt.googlegroups.com>
	<1168353975.285391.212350@m30g2000cwm.googlegroups.com>
Message-ID: <1168354891.334807.58940@s80g2000cwa.googlegroups.com>

yea i meant to have animal extend thing and dog extend animal....my
mistake.

anyways, is there a way to check without having an instance of the
class?

such as,

isinstance(Dog, (Animal, Thing)) ??

thanks



From heikki at osafoundation.org  Fri Jan 12 20:01:04 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 12 Jan 2007 17:01:04 -0800
Subject: More M2Crypto issues. Not big ones, though.
In-Reply-To: <SrUph.33250$Gr2.12865@newssvr21.news.prodigy.net>
References: <SrUph.33250$Gr2.12865@newssvr21.news.prodigy.net>
Message-ID: <3JGdnb2VxN7PsjXYnZ2dnUVZ_hydnZ2d@comcast.com>

John Nagle wrote:
>   A list of small problems and bugs in the current M2Crypto:
> I need to look at SSL certificates in some detail, so this
> is all about the access functions for certificates.

Thanks, got the reports, will check them out.

>     3. /M2Crypto/SSL/Connection.py:147:
>     DeprecationWarning: Old style callback, use cb_func(ok, store)
>     instead return m2.ssl_connect(self.ssl)
>     (Also reported, in Polish, here:
> http://www.mail-archive.com/pld-devel-pl at lists.pld-linux.org/msg12433.html)
>     Entered into Bugzilla as #7718.

This is actually intended. Once I figure out how to implement all the
functionality in the new way I'd like to remove the old way.

> 
>     4. "close()" on an SSL socket that's just finished certificate
>     negotiation hangs, at least on Windows.  "del" does not hang,
>     but I don't know if there's a leak problem.
>     Not enough info yet to file a bug report.  I might be doing
>     something wrong there.  Any known "close" issues?

No known issues, but the ending of an SSL connection is a little grey
area to me so I wouldn't be surprised if there are some cases where we
shut down prematurely or too late. But I don't know why we'd hang.

>     1. X509.X509_name.__getattr__:
>     Field retrieval from X.509 name items with x509_name_by_nid
>     retrieves only first instance of field, not all instances.

Yes, I've been battling with this myself as well. OpenSSL provides
objects to get things as a list, but they are so weird I haven't yet
figured out a way to wrap them in Python so that you would actually be
able to get some values out.

>     2. Unclear if M2Crypto's X.509 interface is UTF-8 compatible.
>     OpenSSL will return info in UTF-8 if you use the
>     ASN1_STRFLGS_UTF8_CONVERT flag on as_text, but unclear if the
>     M2 glue code handles this correctly.  Haven't found a UTF8 cert
>     to test it on yet.

Yeah, I am not convinced everything works as it should. Any UTF8 (and
other encoding) samples would be welcome.

> Other than that, I'm having relatively good results with M2Crypto.

Glad to hear.

-- 
  Heikki Toivonen


From fredrik at pythonware.com  Wed Jan 10 09:48:16 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 10 Jan 2007 15:48:16 +0100
Subject: An iterator with look-ahead
References: <slrneq9ubo.bg.horpner@FIAD06.norwich.edu>
Message-ID: <eo2ubg$2f4$1@sea.gmane.org>

Neil Cerutti wrote:

> For use in a hand-coded parser I wrote the following simple
> iterator with look-ahead. I haven't thought too deeply about what
> peek ought to return when the iterator is exhausted. Suggestions
> are respectfully requested. As it is, you can't be sure what a
> peek() => None signifies until the next iteration unless you
> don't expect None in your sequence.

if you're doing simple parsing on an iterable, it's easier and more efficient
to pass around the current token and the iterator's next method:

http://online.effbot.org/2005_11_01_archive.htm#simple-parser-1

</F> 





From gavcomedy at gmail.com  Fri Jan 12 01:42:47 2007
From: gavcomedy at gmail.com (gavino)
Date: 11 Jan 2007 22:42:47 -0800
Subject: FUCK YOU Jerub on #python, you desynced me for no good reason
Message-ID: <1168584166.949097.233620@11g2000cwr.googlegroups.com>

I can't fucking believe this guy.  The chat was jsut getting
interesting about epoll on linux and twisted moduel for it and he
desyncs me.
FUCK JERUB
complete fucking asshole!!



From horpner at yahoo.com  Wed Jan 10 13:06:39 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Jan 2007 19:06:39 +0100
Subject: An iterator with look-ahead
References: <slrneq9ubo.bg.horpner@FIAD06.norwich.edu>
	<dMqdnTbhALKBgzjYnZ2dnUVZ_oupnZ2d@comcast.com>
Message-ID: <slrneqaauk.gk.horpner@FIAD06.norwich.edu>

On 2007-01-10, Steven Bethard <steven.bethard at gmail.com> wrote:
> Neil Cerutti wrote:
>> For use in a hand-coded parser I wrote the following simple
>> iterator with look-ahead.
>
> There's a recipe for this:
>
>    http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/304373
>
> Note that the recipe efficiently supports an arbitrary
> look-ahead, not just a single item.
>
>> I haven't thought too deeply about what peek ought to return
>> when the iterator is exhausted. Suggestions are respectfully
>> requested.
>
> In the recipe, StopIteration is still raised on a peek()
> operation that tries to look past the end of the iterator.

That was all I could think of as an alternative, but that makes
it fairly inconvenient to use. I guess another idea might be to
allow user to provide a "no peek" return value in the
constructor, if they so wish.

-- 
Neil Cerutti


From deets at nospam.web.de  Fri Jan 26 03:55:09 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 26 Jan 2007 09:55:09 +0100
Subject: Prefered install method?
In-Reply-To: <GuadndfwVf7pMCTYRVnzvA@telenor.com>
References: <GuadndfwVf7pMCTYRVnzvA@telenor.com>
Message-ID: <51tu02F1lqdjbU1@mid.uni-berlin.de>

Tina I schrieb:
> Another noob question:
> I have written my first linux application that might actually be of 
> interest to others. Just for fun I also wrote an install script that put 
> the files in the common directories for my distro (Debian). That is in 
> /usr/local/. (This particular program can be run directly from the 
> user's /home but as a learning experience I want to do it the 'coorect' 
> way)
> 
> Now, I don't know if that is the way to do it with python applications. 
> I also don't know if a custom install script is the norm. I have seen 
> some use of makefiles and tried to find something about it but the 
> manual for GNUMake really assume you are familiar with/ using C which 
> I'm not. I have googled a lot for this but can't really find anything 
> aimed for someone just learning programming with Python.
> 
> So my question is; What is the preferred/ common way to install a python 
> application so it's not really distro specific? And are there any good 
> resources on this on the web?

These days, it's setuptools. Google for it. It will let you distribute 
your application in a convenient way as so-called EGG (basically a 
ZIP-file), additionally you will get support for installing scripts in 
/usr/bin or wherever you like, and you have versioning support.

If you plan to release the app publically, it will also handle the 
upload to the PyPI, the python package index - also known(?) as cheeseshop.

Diez


From deacon.sweeney at gmail.com  Fri Jan 26 16:35:20 2007
From: deacon.sweeney at gmail.com (deacon.sweeney at gmail.com)
Date: 26 Jan 2007 13:35:20 -0800
Subject: Resizing widgets in text windows
Message-ID: <1169847315.631951.295830@a75g2000cwd.googlegroups.com>

Hi, I've been searching for a .resize()-like function to overload much
like can be done for the delete window protocol as follows:

toplevel.protocol("WM_DELETE_WINDOW", callback)

I realize that the pack manager usually handles all of the resize
stuff, but I've found an arrangement that the pack manager fails for.
That is, if one embeds a canvas into a window created inside a text
widget, then resize the text widget (via its container), the canvas and
its container windows do not resize. So I need to resize the window
that the canvas is embedded in. The most obvious way of doing this
would be as above, but there does not seem to be an equivalent to the
"WM_DELETE_WINDOW" protocol for resizing.

Any help would be greatly appreciated.

Deacon Sweeney



From bearophileHUGS at lycos.com  Mon Jan  1 20:01:18 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 1 Jan 2007 17:01:18 -0800
Subject: Writing more efficient code
In-Reply-To: <459989ec$0$8759$ed2619ec@ptn-nntp-reader02.plus.net>
References: <mailman.2185.1167676577.32031.python-list@python.org>
	<459959ea$0$8719$ed2619ec@ptn-nntp-reader02.plus.net>
	<1167687229.430930.197720@v33g2000cwv.googlegroups.com>
	<459989ec$0$8759$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <1167699678.310643.140480@n51g2000cwc.googlegroups.com>

Jon Harrop:
> I think most people could pick up the core ideas in a day and start writing
> working programs.

Probably I am not that intelligent, I probably need some months :-) But
that language has many good sides, and one day I'll probably try to
learn it a bit.


> Mathematica is expensive but learning to use pattern matching is much easier
> than learning how to write a pattern matcher and much less tedious than
> reimplementing it yourself all the time (which is exactly what the OP will
> end up doing).

I see. This is a very old post of mine, at the bottom there are few
notes about the Mathematica pattern matching syntax:
http://groups.google.com/group/comp.lang.python/msg/93ce3e9a08f5e4c7

To avoid reimplementing it yourself all the time then maybe someone
(you?) can try to write a good pattern matcher for sequences for
CPython. With such system it may become less important to switch to a
different language ;-)

Bye,
bearophile



From tiedon_jano at hotmail.com  Sat Jan  6 17:01:12 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Sat, 06 Jan 2007 22:01:12 GMT
Subject: still struggling, howto use a list-element as a name ?
In-Reply-To: <45a01981$0$296$426a74cc@news.free.fr>
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
	<45a01981$0$296$426a74cc@news.free.fr>
Message-ID: <I_Unh.390$_B1.309@read3.inet.fi>

Bruno Desthuilliers kirjoitti:
> Stef Mientki a ?crit :
>> In the example below, "pin" is an object with a number of properties.
>> Now I want
>> 1- an easy way to create objects that contains a number of these "pin"
>> 2- an multiple way to access these "pin", i.e.
>>         device.pin[some_index]
>>     device.some_logical_name
>> ad 1:
>> a dictionary (as "pinlist" in the example) seems a very convenient     
>> way (from a viewpoint of the device creator).
>> As you can see in the "__init__" section this dictionary can easily be 
>> transported to the pin-objects.
>>
>> ad 2:
>> THAT's the problem: how do automate these lines "self.GND = self.pin[0]"
>>
>> I'm also in for other solutions.
> 
> I'm afraid I don't understand your design (nor the domain FWIW). 
ditto
> <snip>
> 
> But the whole thing still looks awfully convulted and kludgy to me, and 
> I suspect serious design flaws... Why don't you try and explain  your 
> real problem, instead of asking how to implement what you *think* is the 
> solution ?
ditto

Cheers,
Jussi


From fdelente at mail.cpod.fr  Sat Jan 27 02:36:13 2007
From: fdelente at mail.cpod.fr (Fabrice DELENTE)
Date: 27 Jan 2007 07:36:13 GMT
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
	<45ba50c7$0$31432$426a74cc@news.free.fr>
	<slrnerks72.jc.horpner@FIAD06.norwich.edu>
	<12rl5mq4nnqoea0@corp.supernews.com>
	<45bafda7$0$2417$426a74cc@news.free.fr>
Message-ID: <45bb00ec$0$30487$426a34cc@news.free.fr>

To really be sure that the problem is when I use python, I tried in C:

#include <stdio.h>
#include <ncurses.h>

int main(void)
{
  initscr();		  /* Start curses mode */
  // printw("???o?");	  /* Print Hello World */
  addstr("???o?");	  /* Print Hello World */
  refresh();	   	  /* Print it on to the real screen */
  getch();	    	  /* Wait for user input */
  endwin();	     	  /* End curses mode */
    
  return(0);
}

and both my tries (with printw, or with addstr) showed the 8-bot chars
correctly.

-- 
Fabrice DELENTE


From robert.kern at gmail.com  Tue Jan  9 21:32:57 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 09 Jan 2007 20:32:57 -0600
Subject: Read CSV file into an array
In-Reply-To: <1168396138.395017.299530@o58g2000hsb.googlegroups.com>
References: <1168396138.395017.299530@o58g2000hsb.googlegroups.com>
Message-ID: <eo1j8v$9le$1@sea.gmane.org>

oyekomova wrote:
> I would like to know how to read a CSV file with a header ( n columns
> of float data) into an array without the header row.

Did you read our responses from the last time you asked this question?

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From bj_666 at gmx.net  Tue Jan  9 15:36:18 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 09 Jan 2007 21:36:18 +0100
Subject: Newbie - converting csv files to arrays in NumPy
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
Message-ID: <pan.2007.01.09.20.36.18.372058@gmx.net>

In <1168373279.943232.228160 at o58g2000hsb.googlegroups.com>, oyekomova
wrote:

> I would like to know how to convert a csv file with a header row into a
> floating point array without the header row.

Take a look at the `csv` module in the standard library.

Ciao,
	Marc 'BlackJack' Rintsch



From bj_666 at gmx.net  Fri Jan  5 10:34:31 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 05 Jan 2007 16:34:31 +0100
Subject: Encoding / decoding strings
References: <1167999295.242042.79470@s34g2000cwa.googlegroups.com>
	<1168010144.000928.131920@42g2000cwt.googlegroups.com>
Message-ID: <pan.2007.01.05.15.34.29.883744@gmx.net>

In <1168010144.000928.131920 at 42g2000cwt.googlegroups.com>,
oliver at obeattie.com wrote:

> Basically, I want to encode an email address so that it looks something
> like 8d2e23c0a835598510c88a758c6b215a - this way the user does not know
> the email address they are looking at. They are public-facing views and
> they are to get info about other users, therefore anonymity is
> important.
> 
> Any suggestions?

Don't deliver encoded e-mail addresses to other users.  They might decode
them and the anonymity is gone.

What exactly are you trying to do?  Why should users see encrypted e-mail
addresses of others?

Ciao,
	Marc 'BlackJack' Rintsch



From gnewsg at gmail.com  Thu Jan 11 05:52:41 2007
From: gnewsg at gmail.com (billie)
Date: 11 Jan 2007 02:52:41 -0800
Subject: sleep in asyncore
Message-ID: <1168512761.621361.258180@o58g2000hsb.googlegroups.com>

Hi all.
I'm writing an authentication server by using asyncore / asynchat
modules.
I'd like to implement a basic brute-force protection by "freezing /
sleeping" the current client session for a period of time (e.g. 2
seconds) when the user sends a wrong password.
Does someone knows a "trick" to do that with asyncore?


Thanks in advance for your helping.



From paddy3118 at netscape.net  Tue Jan  9 02:57:29 2007
From: paddy3118 at netscape.net (Paddy)
Date: 8 Jan 2007 23:57:29 -0800
Subject: Colons, indentation and reformatting. (2)
In-Reply-To: <45a33a24$0$7658$4c368faf@roadrunner.com>
References: <1168323368.592642.314130@i15g2000cwa.googlegroups.com>
	<45a33a24$0$7658$4c368faf@roadrunner.com>
Message-ID: <1168329449.577659.214890@s34g2000cwa.googlegroups.com>


OK, whilst colons are not sufficient to re-format a completely
mis-indented file. I'm thinking that they are sufficient for
reformatting most pasted code blocks when refactoring say?
- Paddy.



From harvey.thomas at informa.com  Fri Jan 19 05:45:54 2007
From: harvey.thomas at informa.com (harvey.thomas at informa.com)
Date: 19 Jan 2007 02:45:54 -0800
Subject: Match 2 words in a line of file
References: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
	<1169166223.073714.109620@51g2000cwl.googlegroups.com>
	<1169172293.938820.103400@51g2000cwl.googlegroups.com>
	<1169172954.107365.133950@51g2000cwl.googlegroups.com>
	<1169175299.490994.244700@51g2000cwl.googlegroups.com>
Message-ID: <1169203554.455579.243560@11g2000cwr.googlegroups.com>


Rickard Lindberg wrote:

> I see two potential problems with the non regex solutions.
>
> 1) Consider a line: "foo (bar)". When you split it you will only get
> two strings, as split by default only splits the string on white space
> characters. Thus "'bar' in words" will return false, even though bar is
> a word in that line.
>
> 2) If you have a line something like this: "foobar hello" then "'foo'
> in line" will return true, even though foo is not a word (it is part of
> a word).

Here's a solution using re.split:

import re
import StringIO

wordsplit = re.compile('\W+').split
def matchlines(fh, w1, w2):
    w1 = w1.lower()
    w2 = w2.lower()
    for line in fh:
        words = [x.lower() for x in wordsplit(line)]
        if w1 in words and w2 in words:
            print line.rstrip()

test = """1st line of text (not matched)
2nd line of words (not matched)
3rd line (Word test) should match (case insensitivity)
4th line simple test of word's (matches)
5th line simple test of words not found (plural words)
6th line tests produce strange words (no match - plural)
7th line "word test" should find this
"""
matchlines(StringIO.StringIO(test), 'test', 'word')



From exarkun at divmod.com  Tue Jan 16 09:11:38 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 16 Jan 2007 09:11:38 -0500
Subject: Debugging SocketServer.ThreadingTCPServer
In-Reply-To: <pan.2007.01.16.05.23.34.541910@bmsi.com>
Message-ID: <20070116141138.11447.663310173.divmod.quotient.18554@ohm>

On Tue, 16 Jan 2007 00:23:35 -0500, "Stuart D. Gathman" <stuart at bmsi.com> wrote:
>I have a ThreadingTCPServer application (pygossip, part of
>http://sourceforge.net/projects/pymilter).  It mostly runs well, but
>occasionally goes into a loop.  How can I get a stack trace of running
>threads to figure out where the loop is?  Is there some equivalent of
>sending SIGQUIT to Java to get a thread dump?  If needed, I can import pdb
>and set options at startup, but there needs to be some external way of
>triggering the dump since I can't reproduce it at will.

Grab the gdbinit out of Python SVN Misc/ directory.  Apply this patch:

  http://jcalderone.livejournal.com/28224.html

Attach to the process using gdb.  Make sure you have debugging symbols
in your build of Python.  Run 'thread apply all pystack'.

Jean-Paul


From seandavi at gmail.com  Wed Jan 10 17:37:29 2007
From: seandavi at gmail.com (Sean Davis)
Date: 10 Jan 2007 14:37:29 -0800
Subject: Read from database, write to another database, simultaneously
Message-ID: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>

I am working on a simple script to read from one database (oracle) and
write to another (postgresql).  I retrieve the data from oracle in
chunks and drop the data to postgresql continuously.  The author of one
of the python database clients mentioned that using one thread to
retrieve the data from the oracle database and another to insert the
data into postgresql with something like a pipe between the two threads
might make sense, keeping both IO streams busy.  Any hints on how to
get started? 

Thanks,
Sean



From bearophileHUGS at lycos.com  Tue Jan 30 05:53:49 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 30 Jan 2007 02:53:49 -0800
Subject: Executing Javascript, then reading value
In-Reply-To: <mailman.3277.1170104720.32031.python-list@python.org>
References: <1170103447.839304.44900@v33g2000cwv.googlegroups.com>
	<mailman.3277.1170104720.32031.python-list@python.org>
Message-ID: <1170154429.566551.150810@p10g2000cwp.googlegroups.com>

Jean-Paul Calderone:
> You might look into the
> stand-alone Spidermonkey runtime.  However, it lacks the DOM APIs, so
> it may not be able to run the JavaScript you are interested in running.
> There are a couple other JavaScript runtimes available, at least.

This may be okay too:
http://www.digitalmars.com/dscript/

Bye,
bearophile



From duncan.booth at invalid.invalid  Sat Jan  6 16:24:15 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 6 Jan 2007 21:24:15 GMT
Subject: Recommended way to force a thread context switch?
References: <GzOnh.112$a81.91@nntpserver.swip.net>
	<1168103258.602286.146100@42g2000cwt.googlegroups.com>
	<1168104008.910681.46800@38g2000cwa.googlegroups.com>
	<mailman.2373.1168116439.32031.python-list@python.org>
Message-ID: <Xns98B0D9B8ABB0Bduncanbooth@127.0.0.1>

Lloyd Zusman <ljz at asfast.com> wrote:

> I have a python (2.5) program with number of worker threads, and I want
> to make sure that each of these does a context switch at appropriate
> times, to avoid starvation.  I know that I can do a time.sleep(0.001) to
> force such a switch, but I'm wondering if this is the recommended
> method.

The recommended method is to start a new thread rather than following up on 
an existing thread with an unrelated question.

Why do you think that just letting the threads run won't have the effect 
you desire? Leave it to the system to schedule the threads.


From gagsl-py at yahoo.com.ar  Tue Jan 16 21:56:55 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 16 Jan 2007 23:56:55 -0300
Subject: Help: asyncore/asynchat and terminator string
In-Reply-To: <45AD5A2F.7060701@ilm.com>
References: <45AD5A2F.7060701@ilm.com>
Message-ID: <7.0.1.0.0.20070116233534.04676110@yahoo.com.ar>

At Tuesday 16/1/2007 20:05, David Hirschfield wrote:

>I'm implementing a relatively simple inter-application communication
>system that uses asyncore/asynchat to send messages back and forth.
>
>The messages are prefixed by a length value and terminator string, to
>signal that a message is incoming, and an integer value specifying the
>size of the message, followed by the message data.
>
>My question is: how can I produce a short terminator string that won't
>show up (or has an extremely small chance of showing up) in the binary
>data that I send as messages?

If you send previously the size of data to follow, there is no need 
for a terminator. On the receiving side, just read so many bytes; 
it's a lot easier. Anyway you can add a terminator, and check for it 
after the data arrives, just a small consistency test.

If you can't do that for whatever reason, usually it's done 
backwards: ensure the chosen (fixed) terminator never happens inside 
the message.
Example: encoding using || as terminator, % as quote character:
- any | inside the message is prefixed by the quote character: | -> %|
- any % inside the message is doubled: % -> %%
This way, any terminator inside the message would be converted to 
%|%| and could never be confused.
At the receiving side, decode as follows:
- search for any % character; when found, delete it and keep the 
following character; keep searching until no more % are found.



-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From michele.petrazzoDELETE at DELETEunipex.it  Fri Jan  5 12:51:38 2007
From: michele.petrazzoDELETE at DELETEunipex.it (Michele Petrazzo)
Date: Fri, 05 Jan 2007 17:51:38 GMT
Subject: wxWindows off-screen?
In-Reply-To: <enlb0j$qrd$1@news1.carnet.hr>
References: <enlb0j$qrd$1@news1.carnet.hr>
Message-ID: <Kewnh.99656$uv5.1299821@twister1.libero.it>

Ivan Voras wrote:
> Is it possible to draw a widget or a window in an off-screen buffer?

(Assuming that you are on linux.)

wxWigets (wxWindows is the old name) or better, since if you are on a
python ng, wxPython :), can't be used if you are on a not-X machine:

michele:~$ env | grep DIS
DISPLAY=:0.0
michele:~$ export DISPLAY=
michele:~$ env | grep DIS
DISPLAY=
michele:~$ python
Python 2.4.4 (#2, Oct 20 2006, 00:23:25)
[GCC 4.1.2 20061015 (prerelease) (Debian 4.1.1-16.1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import wx a = wx.PySimpleApp()
Unable to access the X Display, is $DISPLAY set properly?
michele:~$ echo $?
1
michele:~$

> What I'm trying to do is capture rendered HTML to a bitmap (in other 
> words, something like html2bitmap) by using wxWindows' HTML widget.
> If anyone has a different way of doing it, I'd be glad to hear it...

For me you have some solutions:
- open an X server (only X, you don't need gdm, kdm other), set the
   right DISPLAY env variable and use wx. Ok, you need (a lot of) memory,
   that in my tests are about 16 M for Xorg and 24 for python with wx,
   a wxFrame, wxPanel and some controls.
   Can be a good/the right solution for me.
- If I remember correctly, there are a project that "emulate" an X
   server (so the same that the X solution, but with less memory), but I
   don't know its name... Try to search on internet.
- Always with an X server, use a browser and with its api (pyxpcom for
   mozilla based, or dcop and pykde for konqueror and so on...), using
   the "print on a file" feature, so print a ps and convert it on an
   image.

Good try :), and not forgot to tell us your results!

Hope this help,
Michele


From mccredie at gmail.com  Thu Jan 18 13:08:35 2007
From: mccredie at gmail.com (Matimus)
Date: 18 Jan 2007 10:08:35 -0800
Subject: closing a "forever" Server Socket
References: <1169123381.930403.24170@38g2000cwa.googlegroups.com>
Message-ID: <1169143715.222186.30530@51g2000cwl.googlegroups.com>

> I want to ask if someone knows a better way for closing a "forever
> server" or if there is a lack in my design.

Generally you don't create a 'forever server'. You create an 'until I
say stop' server. I would do this by looking at the 'serve_forever'
method, and implementing my own 'serve_until_?' method that is similar,
but will stop if a flag is set. Then you have to create a method for
setting that flag. It could be as simple as a keypress, or you could
add a quit method to your dispatcher that sets the flag when a certain
address is visited. That second method probably needs some added
security, otherwise anybody can just visit 'your.server.com/quit' and
shut it down.



From ask.me at mail.com  Mon Jan 29 01:09:07 2007
From: ask.me at mail.com (Jammer)
Date: Mon, 29 Jan 2007 01:09:07 -0500
Subject: decode overwrite variable?
Message-ID: <21235$45bd8f83$d8a87c2a$18298@NEXICOM.NET>

Will a failed decode overwrite the variable?

message = message.decode('iso-8859-1')
or do I need to do
msg = message.decode('iso-8859-1')


From klappnase at web.de  Tue Jan 16 14:03:57 2007
From: klappnase at web.de (klappnase)
Date: 16 Jan 2007 11:03:57 -0800
Subject: Segfault with tktreectrl on python-2.5 on linux
In-Reply-To: <slrneqpuhl.rh.ah@hugin-home1.muc.de>
References: <1168884154.116074.308720@s34g2000cwa.googlegroups.com>
	<slrneqnlqh.1hks.ah@hugin-home1.muc.de>
	<1168941826.062298.229080@51g2000cwl.googlegroups.com>
	<slrneqpuhl.rh.ah@hugin-home1.muc.de>
Message-ID: <1168974236.965840.193310@s34g2000cwa.googlegroups.com>


Anton Hartl schrieb:

> The bug report should go to both;  I actually contacted Jeremy Hylton
> as a main contributor of the new AST code two weeks ago but didn't
> get any response.
>

Ok, I submitted bug reports on both the tktreectrl and the python
sourceforge pages.
Now I'll have a nice cup of tea and see what happens :)

Regards

Michael



From duncan.booth at invalid.invalid  Thu Jan 18 07:06:19 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 Jan 2007 12:06:19 GMT
Subject: generate tuples from sequence
References: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>
	<eol9ac$v3l$02$1@news.t-online.com> <KaCrh.1768$R76.979@trnddc05>
	<eon8k9$39m$02$1@news.t-online.com>
Message-ID: <Xns98BC7B2071AD8duncanbooth@127.0.0.1>

Peter Otten <__peter__ at web.de> wrote:
> But still, to help my lack of fantasy -- what would a sane zip()
> implementation look like that does not guarantee the above output?
> 
Hypothetically?

The code in zip which builds the result tuples looks (ignoring error 
handling) like:

// inside a loop building each result element...
    PyObject *next = PyTuple_New(itemsize);

    for (j = 0; j < itemsize; j++) {
        PyObject *it = PyTuple_GET_ITEM(itlist, j);
        PyObject *item = PyIter_Next(it);
        PyTuple_SET_ITEM(next, j, item);
    }

For fixed size tuples you can create them using PyTuple_Pack. So imagine 
some world where the following code works faster for small tuples:

   // Outside the loop building the result list:
   PyObject *a, *b, *c;
   if (itemsize >= 1 && itemsize <= 3) a = PyTuple_GET_ITEM(...);
   if (itemsize >= 2 && itemsize <= 3) b = PyTuple_GET_ITEM(...);
   if (itemsize == 3) c = PyTuple_GET_ITEM(...);
   ...

   // inside the result list loop:
   PyObject *next;
   if (itemsize==1) {
       next = PyTuple_Pack(1,
                PyIter_Next(a));
   } else if (itemsize==2) {
       next = PyTuple_Pack(2,
                PyIter_Next(a),
                PyIter_Next(b));
   } else if (itemsize==2) {
       next = PyTuple_Pack(3,
                PyIter_Next(a),
                PyIter_Next(b),
                PyIter_Next(c));
   } else {
       next = PyTuple_New(itemsize);

       for (j = 0; j < itemsize; j++) {
           PyObject *it = PyTuple_GET_ITEM(itlist, j);
           PyObject *item = PyIter_Next(it);
           PyTuple_SET_ITEM(next, j, item);
       }
   }

If compiled on a system where the stack grows downwards (as it often does) 
the C compiler is very likely to evaluate function arguments in reverse 
order.

(BTW, this also assumes that it's an implementation which uses exceptions 
or something for error handling otherwise you probably can't get it right, 
but maybe something like IronPython could end up with code like this.)

Or maybe if someone added PyTuple_Pack1, PyTuple_Pack2, PyTuple_Pack3 
functions which grab their memory off a separate free list for each tuple 
length. That might speed up the time to create the tuples as you might be 
able to just reset the content not rebuild the object each time. Again that 
could make code like the above run more quickly.


From gibo at gentlemail.com  Tue Jan 23 06:09:08 2007
From: gibo at gentlemail.com (GiBo)
Date: Wed, 24 Jan 2007 00:09:08 +1300
Subject: How to instantiate a different class in a constructor?
Message-ID: <45B5ECD4.3040207@gentlemail.com>

Hi all,

I have a class URI and a bunch of derived sub-classes for example
HttpURI, FtpURI, HttpsURI, etc. (this is an example, I know there is
module urllib & friends, however my actual problem however maps very
well to this example).

Now I want to pass a string to constructor of URI() and get an instance
of one of the subclasses back. For example uri=URI('http://abcd/...')
will make 'uri' an instance of HttpURI class, not instance of URI.

To achieve this I have a list of all subclasses of URI and try to
instantiate one by one in URI.__new__(). In the case I pass e.g. FTP URI
to HttpURI constructor it raises ValueError exception and I want to test
HttpsURI, FtpURI, etc.

For now I have this code:

=====
class URI(object):
        def __new__(self, arg):
                for subclass in subclasses:
                        try:
                                instance = object.__new__(subclass, arg)
                                return instance
                        except ValueError, e:
                                print "Ignoring: %s" % e
                raise ValueError("URI format not recognized" % arg)

class HttpURI(URI):
        def __init__(self, arg):
                if not arg.startswith("http://"):
                        raise ValueError("%s: not a HTTP URI" % arg)
                self._uri = arg

class FtpURI(URI):
        def __init__(self, arg):
                if not arg.startswith("ftp://"):
                        raise ValueError("%s: not a FTP URI")
                self._uri = arg

subclasses = [HttpURI, FtpURI]

if __name__ == "__main__":
        print "Testing HTTP URI"
        uri = URI("http://server/path")
        print uri

        print "Testing FTP URI"
        uri = URI("ftp://server/path")
        print uri
=====

The problem is that ValueError exception raised in HttpURI.__init__() is
not handled in URI.__new__():

-----
~$ ./tst.py
Testing HTTP URI
<__main__.HttpURI object at 0x808572c>		# this is good
Testing FTP URI
Traceback (most recent call last):
  File "./tst.py", line 35, in <module>
    uri = URI("ftp://server/path")
  File "./tst.py", line 18, in __init__
    raise ValueError("%s: not a HTTP URI" % arg)
ValueError: ftp://server/path: not a HTTP URI	# this is bad
-----

When I change the __init__ methods of subclasses to __new__ I instead get:

-----
./tst.py
Testing HTTP URI
Traceback (most recent call last):
  File "./tst.py", line 29, in <module>
    uri = URI("http://server/path")
  File "./tst.py", line 7, in __new__
    instance = object.__new__(subclass, arg)
TypeError: default __new__ takes no parameters
-----

Does anyone have any hints on how to solve this problem? (other than
using urllib or other standard modules - as I said this is just to
demonstrate the nature of my problem).

Thanks!


GiBo


From robert.kern at gmail.com  Fri Jan  5 19:58:37 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 05 Jan 2007 18:58:37 -0600
Subject: PyType_IsSubtype ()
In-Reply-To: <1167996955.467665.286170@42g2000cwt.googlegroups.com>
References: <1167986947.735415.99970@s34g2000cwa.googlegroups.com>	<459E1988.8060807@v.loewis.de>
	<1167996955.467665.286170@42g2000cwt.googlegroups.com>
Message-ID: <enms80$hg2$1@sea.gmane.org>

Sheldon wrote:

> I ran the program in GDB and it crashed giving the following backtrace:
> 
> #0  0x4008376e in PyType_IsSubtype () from /usr/lib/libpython2.3.so.1.0
> #1  0x4047730c in ?? () from
> /usr/lib/python2.3/site-packages/Numeric/_numpy.so
> #2  0x000000f2 in ?? ()
> #3  0x08d9dd34 in ?? ()
> #4  0x4046c780 in PyArray_Return () from
> /usr/lib/python2.3/site-packages/Numeric/_numpy.so
> #5  0x08d9dd44 in ?? ()
> #6  0x40100300 in PyBaseString_Type () from
> /usr/lib/libpython2.3.so.1.0
> #7  0x08105718 in ?? ()
> #8  0x4007490d in PyObject_Init () from /usr/lib/libpython2.3.so.1.0
> #9  0x08105ae0 in ?? ()
> 
> Can you make head or tail of this?

No, we still need more information. Can you tell us what version of Numeric you
are using? The latest is 24.2, so you might want to try that if you are not already.

Also, please try to come up with the smallest self-contained snippet of code
that demonstrates the bug so that the rest of us can try to replicate it.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From Thomas.Ploch at gmx.net  Thu Jan  4 23:28:41 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Fri, 05 Jan 2007 05:28:41 +0100
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <12prkb29em82cac@corp.supernews.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>	<7.0.1.0.0.20070105004837.05b36d98@yahoo.com.ar>	<mailman.2308.1167969320.32031.python-list@python.org>
	<12prkb29em82cac@corp.supernews.com>
Message-ID: <459DD3F9.5040603@gmx.net>

Grant Edwards schrieb:
> On 2007-01-05, Thomas Ploch <Thomas.Ploch at gmx.net> wrote:
> 
>>>> I am writing a class that is intended to be subclassed.  What
>>>> is the proper way to indicate that a sub class must override a
>>>> method?
>>> If any subclass *must* override a method, raise
>>> NotImplementedError in the base class (apart from documenting
>>> how your class is supposed to be used).
>> I learn so much from this list. I didn't even know this error existed.
> 
> And remember: even if it didn't, you could have created your
> own:

Erm, it wasn't me who asked. I just wanted to say that I didn't know
that there is a NotImplementedError. Havn't seen it before.

:-)

Thomas


From Norbert.Klamann at projecthome.de  Fri Jan 12 08:36:18 2007
From: Norbert.Klamann at projecthome.de (Norbert)
Date: 12 Jan 2007 05:36:18 -0800
Subject: Hint :Easy_Install Documentation
Message-ID: <1168608975.981916.200080@s34g2000cwa.googlegroups.com>

Hello list,
just in the moment I wanted to write about then lacking documentation
about Easy_Install, but then I found this one :
http://www-128.ibm.com/developerworks/library/l-cppeak3.html.

Just for google.


HTH

Norbert



From skip at pobox.com  Sat Jan 13 15:53:29 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 13 Jan 2007 14:53:29 -0600
Subject: Threaded for loop
In-Reply-To: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
Message-ID: <17833.18121.441468.699493@montanaro.dyndns.org>


    John> I want to do something like this:

    John> for i = 1 in range(0,N):
    John>  for j = 1 in range(0,N):
    John>    D[i][j] = calculate(i,j)

    John> I would like to now do this using a fixed number of threads, say
    John> 10 threads.  What is the easiest way to do the "parfor" in python?

I'd create a queue containing 10 tokens.  Pull a token off the queue, invoke
the thread with the parameters for its chunk, have it compute its bit, lock
D, update it, unlock it, then return the token to the token queue. Sketching
(and completely untested):

    # Calculate one row of D
    def calcrow(i, N, token, Tqueue, Dqueue):
        d = [0.0] * N
        for j in range(N):
            d[j] = calculate(i, j)
        D = Dqueue.get()
        D[i][:] = d
        Dqueue.put(D)
        Tqueue.put(token)

    # This queue limits the number of simultaneous threads
    Tqueue = Queue.Queue()
    for i in range(10):
        Tqueue.put(i)

    # This queue guards the shared matrix, D
    Dqueue = Queue.Queue()
    D = []
    for i in range(N):
        D.append([0.0] * N)
    Dqueue.put(D)

    for i in range(N):
        token = Tqueue.get()
        t = threading.Thread(target=calcrow, args=(i, N, token, Tqueue,
                                                   Dqueue))
        t.start()

Skip


From martin at v.loewis.de  Wed Jan 31 02:48:58 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 31 Jan 2007 08:48:58 +0100
Subject: Unicode error handler
In-Reply-To: <mailman.3314.1170174675.32031.python-list@python.org>
References: <epdmae$qps$1@sea.gmane.org>
	<mailman.3314.1170174675.32031.python-list@python.org>
Message-ID: <45C049EA.60009@v.loewis.de>

Walter D?rwald schrieb:
> You might try the following:
> 
> # -*- coding: iso-8859-1 -*-
> 
> import unicodedata, codecs
> 
> def transliterate(exc):
> 	if not isinstance(exc, UnicodeEncodeError):
> 		raise TypeError("don'ty know how to handle %r" % r)
> 	return (unicodedata.normalize("NFD", exc.object[exc.start])[:1],
> exc.start+1)

I think a number of special cases need to be studied here.
I would expect that this is "semantically correct" if the characters
being dropped are combining characters (at least in the languages I'm
familiar with, it is common to drop them for transliteration).

However, if you do

py> for i in range(65536):
...   c = unicodedata.normalize("NFD", unichr(i))
...   for c2 in c[1:]:
...     if not unicodedata.combining(c2): print hex(i),;break

you'll see that there are many characters which don't decompose
into a base character + sequence of combining characters. In
particular, this involves all hangul syllables (U+AC00..U+D7A3),
for which it is just incorrect to drop the "jungseongs"
(is that proper wording?).

There are also some cases which I'm completely uncertain about,
e.g. ORIYA VOWEL SIGN AI decomposes to ORIYA VOWEL SIGN E +
ORIYA AI LENGTH MARK. Is it correct to drop the length mark?
It's not listed as a combining character. Likewise,
MYANMAR LETTER UU decomposes to MYANMAR LETTER U +
MYANMAR VOWEL SIGN II; same question here.

Regards,
Martin


From rampeters at gmail.com  Fri Jan 12 11:11:23 2007
From: rampeters at gmail.com (johnny)
Date: 12 Jan 2007 08:11:23 -0800
Subject: Any python based "Live Web Chat Support"
Message-ID: <1168618282.128710.52500@l53g2000cwa.googlegroups.com>

Is there any open source "live web chat support" program or script out
there?  Any you can recommend?



From deacon.sweeney at gmail.com  Tue Jan 30 17:02:11 2007
From: deacon.sweeney at gmail.com (deacon.sweeney at gmail.com)
Date: 30 Jan 2007 14:02:11 -0800
Subject: Resizing widgets in text windows
In-Reply-To: <epei9l$7ej$1@zinnia.noc.ucla.edu>
References: <1169847315.631951.295830@a75g2000cwd.googlegroups.com>
	<epei9l$7ej$1@zinnia.noc.ucla.edu>
Message-ID: <1170194530.966547.312010@q2g2000cwa.googlegroups.com>

On Jan 26, 10:52 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> deacon.swee... at gmail.com wrote:
> > Hi, I've been searching for a .resize()-like function to overload much
> > like can be done for the delete window protocol as follows:
>
> > toplevel.protocol("WM_DELETE_WINDOW", callback)
>
> > I realize that the pack manager usually handles all of the resize
> > stuff, but I've found an arrangement that the pack manager fails for.
> > That is, if one embeds a canvas into a window created inside a text
> > widget,
>
> Your meaning here is unclear. How is it possible to have "a window
> created inside a text widget"?

using the create_window function, as below.

>
> > then resize the text widget (via its container), the canvas and
> > its container windows do not resize. So I need to resize the window
> > that the canvas is embedded in.
>
> Try the Toplevel.wm_geometry() function.
>
> > The most obvious way of doing this
> > would be as above, but there does not seem to be an equivalent to the
> > "WM_DELETE_WINDOW" protocol for resizing.
>
> Do you want to detect when a window is resized or do you want to resize
> a window programatically.
>
> If the former, bind the Toplevel to '<Configure>'.
>
> E.g.
>
> from Tkinter import *
>
> def config(t):
>    def _r(e, t=t):
>      geom = e.widget.wm_geometry()
>      geom = geom.split('+')[0]
>      t.wm_geometry(geom)
>      print 'resized %s to %s' % (t, geom)
>    return _r
>
> tk = Tk()
> tk.title('resize me')
> t2 = Toplevel(tk)
> t2.title('I get resized')
> tk.bind('<Configure>', config(t2))
>
> Is that cool or what?
>

Yes, this is exactly what I was looking for. Thanks.

> James
>
> > Any help would be greatly appreciated.
>
> >DeaconSweeney







From jorge.vargas at gmail.com  Fri Jan  5 15:52:15 2007
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Fri, 5 Jan 2007 16:52:15 -0400
Subject: PDF rendering toolkit?
Message-ID: <32822fe60701051252s6353f10drc101109adc376fdb@mail.gmail.com>

Hi

I'm looking for a tool to take an actual .pdf file and display it in a
window (I'm using wxwidgets at the moment)

I have found several project but none seem to do what I need.

http://sourceforge.net/projects/pdfplayground seems like a nice
toolkit to edit pdf files with python code, but nothing about
rendering.

I have find out http://poppler.freedesktop.org/ but there seems to be
no python bindings for it.

there is also an example at http://www.daniweb.com/code/snippet618.html
using wx.lib.pdfwin but that is windows only, I need at least Linux
support better if it's platform independant as python *should* be

and the reportlabs BSD packages can't do this.
http://www.reportlab.org/devfaq.html#2.1.5

anyone knows of a toolkit to do this? bonus points if's it is already
integrated into wxpython


From dfj225 at gmail.com  Tue Jan  9 19:25:48 2007
From: dfj225 at gmail.com (dfj225 at gmail.com)
Date: 9 Jan 2007 16:25:48 -0800
Subject: dynamic library loading, missing symbols
Message-ID: <1168388748.024090.119530@i39g2000hsf.googlegroups.com>

While my question doesn't pertain specifically to python programming,
it is a result of developing a python module, so I'm hoping someone
here might have experience with this issue.

So, first a little background to how the system works right now. I am
developing a module for Python. The original code is written in C++ and
I am creating a wrapper using Boost.Python. The C++ code for the module
makes calls into a library that in turn dynamically loads a library
(using dlopen). This dynamically loaded library, in turn, expects to
find a symbol in the code that loaded it (using extern it declares a
variable). However, the linker fails at runtime here because it can't
find this symbol. The variable in question does exist in the C++ code
that in does dlopen.

The reason for the complication is that I don't have control over how
the library does dlopen() or how the code that calls dlopen was
compiled. I am, however, able to control the build process for the
Boost.Python wrapper and the original C++ code that the Boost.Python
wraps. I've tried as many linker tricks as I can think of to get this
to work. Both the boost wrapper and the C++ code that it wraps are
built using --export-dynamic.

Is there a way to set at runtime what directories or libraries the
linker should search for these symbols? I have set LD_LIBRARY_PATH
correctly, but that didn't seem to affect anything.

For reference, I am running on Gentoo linux 2.6.11.12 with gcc 3.4.4

I'm interested in any ideas that might help, but the ideal one should
work on any *nix system and not just linux.

(Please don't suggest that I change the operation of the code that is
doing dlopen, as it is 3rd party and not something that would be in our
best interest to work on).

If you think I need to provide more information, I'd be happy to try
and clarify things.

Thanks,
~Doug



From robert.kern at gmail.com  Mon Jan 15 17:52:52 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 15 Jan 2007 16:52:52 -0600
Subject: The curious behavior of integer objects
In-Reply-To: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
Message-ID: <eoh0kd$a65$1@sea.gmane.org>

Jim B. Wilson wrote:
> Am I nuts? Or only profoundly confused? I expected the this little script
> to print "0":
> 
> class foo(int): 
>   def __init__(self, value):
>     self = value & 0xF

That statement only rebinds the local name self to something else. It does not
modify the object at all or change the result of instantiating foo(). You need
to override __new__ to get the behavior that you want.

  http://www.python.org/download/releases/2.2.3/descrintro/#__new__

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From grante at visi.com  Fri Jan  5 10:14:28 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 05 Jan 2007 15:14:28 -0000
Subject: program deployment
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
Message-ID: <12psqqk75ij5ta5@corp.supernews.com>

On 2007-01-05, king kikapu <aboudouvas at panafonet.gr> wrote:

> i am learning Python, just finished a book and i am starting
> to write programs. I just want to ask, is the "correct" way to
> deploy my programs to other computers, the .pyc files ??

That depends on the platform.  Under Linux, one usually just
provides the source.

Under Windows, I ususally use py2exe+inno-setup.

> I now that with the "-m compileall ." switch can compile a .py
> file into bytecodes. So i suppose that if Python has to run a
> .pyc file, it will load and execute it faster.

A little bit, yes.

> And if i have some "sensitive" data in my source, like
> passwords (and the source of cource!) they will be more secure
> in a compiled file.

Not really.

-- 
Grant Edwards                   grante             Yow!  I represent a
                                  at               sardine!!
                               visi.com            


From ptmcg at austin.rr.com  Tue Jan 23 14:19:01 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 23 Jan 2007 11:19:01 -0800
Subject: Overloading assignment operator
In-Reply-To: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <1169579940.966652.191990@l53g2000cwa.googlegroups.com>

On Jan 23, 12:24 pm, Achim Domma <d... at procoders.net> wrote:
> Hi,
>
> I want to use Python to script some formulas in my application. The user
> should be able to write something like
>
> A = B * C
>
> where A,B,C are instances of some wrapper classes. Overloading * is no
> problem but I cannot overload the assignment of A. I understand that
> this is due to the nature of Python, but is there a trick to work around
> this?
> All I'm interested in is a clean syntax to script my app. Any ideas are
> very welcome.
>
> regards,
> Achim

Simple option: how do you feel about using '<<=' instead of '=' (by
defining __ilshift__)?  This gives you:

A <<= B * C

(looks sort of like "injecting" the result of B times C into A)

More complicated option: embed an expression/assignment parser into
your app.  You can get a jump on this using some of the examples that
come with pyparsing (can check these out online at
http://pyparsing.wikispaces.com/Examples - look at fourFn.py and
simpleArith.py).

-- Paul



From mail at microcorp.co.za  Wed Jan 10 00:39:41 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 10 Jan 2007 07:39:41 +0200
Subject: Bitwise expression
References: <enud98$960$1@ss408.t-com.hr><mailman.2472.1168332185.32031.python-list@python.org>
	<eo003g$blo$1@ss408.t-com.hr>
Message-ID: <019d01c7348c$1c2fa9e0$03000080@hendrik>

 "Gigs_" <gigs at hi.t-com.hr> wrote:


> Now is all clearer thanks to mensanator at aol.com and Hendrick van Rooyen

Contrary to popular belief in the English speaking world - 

>>> "c" in "Hendrik"
False
>>> 

There is no "c" in "Hendrik"

: - )    - Hendrik



From jstroud at mbi.ucla.edu  Sun Jan 28 19:38:01 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 28 Jan 2007 16:38:01 -0800
Subject: Function to create Tkinter PhotoImages from directory?
In-Reply-To: <b3a5d$45bd39e8$4275d90a$1567@FUSE.NET>
References: <b3a5d$45bd39e8$4275d90a$1567@FUSE.NET>
Message-ID: <epjfl9$o01$2@daisy.noc.ucla.edu>

Kevin Walzer wrote:
> I am trying to create a number of Tk PhotoImages from a single
> directory. Currently I am hard-coding file names and image names, like so:
> 
>  def makeImages(self):
>         self.imagedir = (os.getcwd() + '/images/')
>         self.folder_new=PhotoImage(file=self.imagedir + 'folder_new.gif')
>         self.save=PhotoImage(file = self.imagedir + 'save.gif')
>         self.folder=PhotoImage(file=self.imagedir + 'folder.gif')
>         self.help=PhotoImage(file=self.imagedir + 'help.gif')
>         self.fontsmall=PhotoImage(file=self.imagedir + 'fontsmall.gif')
>         self.stop=PhotoImage(file=self.imagedir + 'stop.gif')
> 
> What I'd like to do is glob the directory and create images with the
> same name as the gif file, but I can't figure out how to get that to
> work. Can anyone help?
> 

Should be (wrote setattr to fast):


def makeImages(self):
   import glob
   import os
   self.imagedir = os.path.join(os.getcwd(), 'images')
   pattern = os.path.join(self.imagedir, '*.gif')
   image_names = glob.glob(pattern)
   for name in image_names:
     base = os.path.basename(name).split('.')[0]
     pathname = os.path.join(self.imagedir, n)
     setattr(self, base, Photoimage(file=pathname))


From stever at cruzio.com  Fri Jan 26 12:30:02 2007
From: stever at cruzio.com (Steve)
Date: 26 Jan 2007 09:30:02 -0800
Subject: Pyparsing - Dealing with a Blank Value
In-Reply-To: <1169784435.941039.269240@k78g2000cwa.googlegroups.com>
References: <1169774005.890880.259830@j27g2000cwj.googlegroups.com>
	<1169784435.941039.269240@k78g2000cwa.googlegroups.com>
Message-ID: <1169832602.513112.141360@a75g2000cwd.googlegroups.com>

Hi Paul!

Thanks for your suggestions on the default value (I didn't know you
could do that!!) and the use of the makeHTMLtags module!

Steve

On Jan 25, 8:07 pm, "Paul McGuire" <p... at austin.rr.com> wrote:
> On Jan 25, 7:13 pm, "Steve" <ste... at cruzio.com> wrote:
>
> > Hi All,
>
> > I've picked up thePyParsingmodule and am trying to figure out how to
> > do a simple parsing of some HTML source code.  My specific problem is
> > dealing with an <TD></TD> element that is blank.
>
> <snip>
>
> > Any assistance would be greatly appreciated!
>
> > SteveJust define a default value to be returned for MultiItem if the
> Optional expression is not found:
>
>     MultiItem = Optional(OneOrMore(dataItem),default="")
> 
> Define default to be whatever string you choose.
> 
> -- Paul



From no-spam at no-spam-no-spam.invalid  Wed Jan 17 13:22:36 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 17 Jan 2007 19:22:36 +0100
Subject: Distributed computation of jobs
In-Reply-To: <1169046239.405261.81740@m58g2000cwm.googlegroups.com>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
	<1168597288.571937.176430@s34g2000cwa.googlegroups.com>
	<eo7sj1$vn6$1@news.albasani.net>
	<slrneqs43f.p5f.hat@se-126.se.wtb.tue.nl>
	<1169046239.405261.81740@m58g2000cwm.googlegroups.com>
Message-ID: <eolpg3$1rg$1@news.albasani.net>

Paul Boddie wrote:
> A.T.Hofkamp skrev:
>> Let me add a few cents to the discussion with this announcement:
> 
> [Notes about exec_proxy, batchlib and rthread]
> 
> I've added entries for these modules, along with py.execnet, to the
> parallel processing solutions page on the python.org Wiki:
> 
> http://wiki.python.org/moin/ParallelProcessing
> 
> Thanks for describing your work to us!
> 
> Paul
> 

as many libs are restriced to certain OS'es, and/or need/rely on 
extension modules, few tags would probably improve: OS'es, 
pure-python, dependeniess


Robert


From zaz600 at gmail.com  Thu Jan 25 02:07:02 2007
From: zaz600 at gmail.com (NoName)
Date: 24 Jan 2007 23:07:02 -0800
Subject: How can i do this in Python?
In-Reply-To: <mailman.3140.1169707796.32031.python-list@python.org>
References: <1169699143.237710.277160@l53g2000cwa.googlegroups.com>
	<mailman.3140.1169707796.32031.python-list@python.org>
Message-ID: <1169708822.345102.67630@s48g2000cws.googlegroups.com>


Thanks;)

On 25 ???., 17:47, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Thursday 25/1/2007 01:25, NoName wrote:
>
> >perl -ane "print join(qq(\t), at F[0,1,20,21,2,10,12,14,11,4,5,6]).qq(\n)"Must be done on a single line?
> I'm not sure if I've got right the behavior - it's been some time
> since I quit writing Perl code. The script iterates over all lines
> contained on all files specified on the command line; for each line,
> splits it on whitespace; then it prints a selected set of fields
> (columns 0, 1, 20, 21...) using a tab character as field separator.
>
> === cut ===
> import operator,fileinput
>
> mapper = map(operator.itemgetter, [0,1,20,21,2,10,12,14,11,4,5,6])
> for line in fileinput.input():
> ? ? ?fields = line.split()
> ? ? ?print '\t'.join(m(fields) for m in mapper)
> === cut ===
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya!http://www.yahoo.com.ar/respuestas



From stargaming at gmail.com  Sun Jan 28 12:48:04 2007
From: stargaming at gmail.com (Stargaming)
Date: Sun, 28 Jan 2007 18:48:04 +0100
Subject: howto redirect and extend help content ?
In-Reply-To: <1fc1a$45bcc7f4$d443bb3a$8806@news.speedlinq.nl>
References: <1fc1a$45bcc7f4$d443bb3a$8806@news.speedlinq.nl>
Message-ID: <epinkk$m0h$1@ulysses.news.tiscali.de>

Stef Mientki schrieb:
> I'm making special versions of existing functions,
> and now I want the help-text of the newly created function to exists of
> 1. an extra line from my new function
> 2. all the help text from the old function
> 
> # the old function
> def triang(M,sym=1):
>     """The M-point triangular window.    <== old help text
>     """
>     ....
> 
> # the new function
> def chunked_triang(M):
>     """ Chunked version of "triang"      <== the extra line
>     """
> 
>  >>> help(chunked_triang)
> # should give something like
> 
> chunked_triang(M)                        <== the new definition
>     Chunked version of "triang"          <== the extra line
>     The M-point triangular window.       <== old help text
> 
> Is that possible ?
> 
> 
> thanks,
> Stef Mientki

Don't you think your users can follow this easy reference theirselves?


From bytter at gmail.com  Wed Jan 31 09:47:12 2007
From: bytter at gmail.com (Hugo Ferreira)
Date: Wed, 31 Jan 2007 14:47:12 +0000
Subject: Synchronous shutil.copyfile()
In-Reply-To: <4e8efcf50701301711m1fb5a0ffi5b3080eed1517214@mail.gmail.com>
References: <mailman.3305.1170169527.32031.python-list@python.org>
	<Vuj*fj+Br@news.chiark.greenend.org.uk>
	<4e8efcf50701301711m1fb5a0ffi5b3080eed1517214@mail.gmail.com>
Message-ID: <4e8efcf50701310647x3b98aa9cobaf543270dc62e84@mail.gmail.com>

I'm banging my head over this one... sometimes it just works... *argh*

Here's a snip of my problem:

import win32com.client
import shutil
import time

engine = win32com.client.Dispatch("DAO.DBEngine.36")
table = 'STUFFTODELETE'
dstFilename = 'in.mdb'
workingfile = 'work.mdb'

shutil.copyfile(dstFilename, workingfile)

print 'Sleeping 5 after copy...'
time.sleep(5)

dstDb = engine.OpenDatabase(workingfile)

print 'Sleeping 5 after open...'
time.sleep(5)

dstDb.Execute('DELETE FROM ' + table)

At at *exactly* this line, I get the error:

C:\Python24\lib\site-packages\win32com\gen_py\00025E01-
0000-0000-C000-000000000046x0x5x0.py    510
com_error: (-2147352567, 'Exception occurred.', (0, 'DAO.Database', 'Not a
valid bookmark.', 'jeterr40.chm', 5003159, -2146825129), None)

Sometimes... Yes, the database is a %"#$"# MSAccess. This script is running
under windows.

Any ideas?

On 1/31/07, Hugo Ferreira <bytter at gmail.com> wrote:
>
> Well.. Thx for the answers.
>
> The only way I had to make it work was to use a time.sleep(10) after the
> shutil.copyfile(). Since this is a night-run script, I can waste 10
> seconds, but it still knocks me out "why" it happens...
>
> Cheers!
>
> Hugo Ferreira
>
> On 30 Jan 2007 18:06:15 +0000 (GMT), Matthew Woodcraft <mattheww at chiark.greenend.org.uk>
> wrote:
> >
> > Hugo Ferreira < bytter at gmail.com> wrote:
> > > I have a problem. I'm using calling shutil.copyfile() followed by
> > > open(). The thing is that most of the times open() is called before
> > > the actual file is copied. I don't have this problem when doing a
> > > step-by-step debug, since I give enough time for the OS to copy the
> > > file, but at run-time, it throws an exception.
> > >
> > > Is there anyway to force a sync copy of the file (make python wait for
> > > the completion)?
> >
> > shutil.copyfile() closes both files before it returns, so I suspect
> > this is an OS-level bug.
> >
> > The most likely culprits are buggy network filesystems and buggy
> > on-access virus scanners.
> >
> > -M-
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070131/af7d1044/attachment.html>

From paddy3118 at netscape.net  Mon Jan  1 01:00:58 2007
From: paddy3118 at netscape.net (Paddy)
Date: 31 Dec 2006 22:00:58 -0800
Subject: OO question
In-Reply-To: <pan.2007.01.01.05.37.52.466540@REMOVE.THIS.cybersource.com.au>
References: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
	<pan.2007.01.01.05.37.52.466540@REMOVE.THIS.cybersource.com.au>
Message-ID: <1167631258.804660.154490@n51g2000cwc.googlegroups.com>


Steven D'Aprano wrote:

> On Sun, 31 Dec 2006 19:47:12 -0800, fejkadress wrote:
>
> > I want to make an addressbook and I'm new to OO programming, so I
> > wonder if this sounds reasonable.
> >
> > I think of making a class Address which contains all data about one
> > person, that class can have UserDict as baseclass so I can access data
> > like object['name'], etc..
>
> If you are using Python 2.2 or greater, you can inherit from dict:
>
>
> >>> class Address(dict):
> ...     pass
> ...
> >>> fred = Address({"address": "123 smith street"})
> >>> fred['address']
> '123 smith street'
>
>
> But ask yourself, what benefit do you gain by subclassing dict? Why not
> just use a dict?
>
> If this is a learning exercise, then sure, go for it, subclass away! But
> if this is meant to be real code, then consider what benefits and costs
> using OO will give you, compared to a function-based approach.
>
> (Please don't assume that this is a thinly veiled hint that OO is the
> wrong approach. It isn't.)
>
>
> > Then maybe I can have a class AddressBook which has a list that
> > contains all those Address objects.
> > Does that sound reasonable?
>
> Again, why create an AddressBook class? Why not just have a list of
> Addresses?
>
>
>
> > And then the real reason that I posted here is:
> > If I want to save all addresses to disk, I can have a method, say,
> > save() of AddressBook. But then what? What is a good object oriented
> > approach? Should each Address object take care of saving itself to the
> > file, with a method like writetofile(filename), or should the class
> > AddressBook take care of the saving and ask each object for its data?
>
>
>
> Here's one approach, assuming that AddressBook is merely a list of
> Addresses and that the Address class knows how to write to an open file
> object:
>
> def save(list_of_addresses, filename):
>     f = file(filename, "w")
>     for address in list_of_addresses:
>         address.save(f)
>     f.close()
>
> Here's a more pure OO approach to do the same thing:
>
> class AddressBook(object):
>     def __init__(self, list_of_addresses):
>         self.addresses = list_of_addresses
>
>     def save(self, filename):
>         f = file(filename, "w")
>         for address in self.addresses:
>             address.save(f)
>         f.close()
>
> Here's a third approach:
>
> class AddressBook(object):
>     def __init__(self, list_of_addresses):
>         self.addresses = list_of_addresses
>         self.currentfile = None
>
>     def save_one_address(self, data):
>         data = do_something_with(data)
>         self.currentfile.write(data)
>
>     def save(self, filename):
>         self.currentfile = file(filename, "w")
>         for address in self.addresses:
>             self.save_one_address(address.export())
>         self.currentfile.close()
>         self.currentfile = None
>
>
> --
> Steven.

Small addition.
If a class does a save then it should also do the load of the data too.



From exarkun at divmod.com  Wed Jan 10 18:45:11 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 10 Jan 2007 18:45:11 -0500
Subject: what is the idiom for copy lots of params into self?
In-Reply-To: <1168469214.452389.221180@p59g2000hsd.googlegroups.com>
Message-ID: <20070110234511.11447.2048857953.divmod.quotient.12511@ohm>

On 10 Jan 2007 14:46:54 -0800, Emin <emin.shopper at gmail.com> wrote:
>Dear Experts,
>
>When writing large classes, I sometimes find myself needing to copy a
>lot of parameters from the argument of __init__ into self. Instead of
>having twenty lines that all basically say something like self.x = x, I
>often use __dict__ via something like:
>
>class example:
>     def __init__(self,a,b,c,d,e,f,g,h,i,j,k,l,m,n):
>         for name in
>['a','b','c','d','e','f','g','h','i','j','k','l','m','n']:
>             self.__dict__[name] = locals()[name]
>
>This saves a lot of code and makes it easier to see what is going on,
>but it seems like there should be a better idiom for this task. Any
>suggestions?

I use a helper, like 

  http://divmod.org/trac/browser/trunk/Epsilon/epsilon/structlike.py#L35

Jean-Paul


From http  Tue Jan 30 19:38:42 2007
From: http (Paul Rubin)
Date: 30 Jan 2007 16:38:42 -0800
Subject: Sorting a List of Lists
References: <1170201351.881776.257790@q2g2000cwa.googlegroups.com>
	<mailman.3331.1170202632.32031.python-list@python.org>
Message-ID: <7x8xfkghd9.fsf@ruckus.brouhaha.com>

L?tezo <letezo at fw.hu> writes:
> > I then thought I'd just go events.sort(lambda x,y: x[2]<y[2]) and call

Use: 
    events.sort(lambda x,y: cmp(x[2], y[2]))
or:
    events.sort(key=lambda x: x[2])


From andymac at bullseye.apana.org.au  Tue Jan 16 17:15:38 2007
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Wed, 17 Jan 2007 08:15:38 +1000
Subject: Python Threads and C Semaphores
In-Reply-To: <eoi163$hnc$1@ss408.t-com.hr>
References: <eohuov$js1$1@nobel.pacific.net.sg> <eoi163$hnc$1@ss408.t-com.hr>
Message-ID: <45AD4E8A.7040008@bullseye.andymac.org>

Dejan Rodiger wrote:
> Jeremy said the following on 16.1.2007 8:27:
>
>> I have a fat C++ extension to a Python 2.3.4 program. In all, I count
>> five threads. Of these, two are started in Python using
>> thread.start_new_thread(), and both of these wait on semaphores in the C++
>> extension using sem_wait(). There also are two other Python threads and one 
>> thread running wholly in
>> the extension.
>>
>> I notice that when one of the Python threads calls the extension and waits
>> on a semaphore, all but the C++ thread halt even when not waiting on any
>> semaphore. How do we get this working right?
> 
> Check the Global Interpreter Lock

More specifically, make sure that any extension code that does not
call Python API functions releases the GIL for the duration.

Look into the Py_BEGIN_ALLOW_THREADS/Py_END_ALLOW_THREADS macros and the
PyGILState*() API functions (these API functions appeared in Python 2.3).

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


From nobody at localhost.localdomain  Fri Jan 12 06:49:56 2007
From: nobody at localhost.localdomain (Steven Wayne)
Date: Fri, 12 Jan 2007 05:49:56 -0600
Subject: Learning Python book, new edition?
References: <mailman.2635.1168592793.32031.python-list@python.org>
	<slrneqepvc.c32.swayne@wayne.powernet>
	<Xns98B671021F2DDduncanbooth@127.0.0.1>
Message-ID: <slrneqetf3.dr7.swayne@wayne.powernet>

On 12 Jan 2007 11:06:29 GMT, Duncan Booth
	<duncan.booth at invalid.invalid> wrote:
> Steven Wayne <nobody at localhost.localdomain> wrote:
>
>> Don't take this the wrong way, but this isn't an email, it's a usenet
>> posting.
>
> It is now, but it started as an email. If you examine its headers he sent 
> it to the list but the list administrator had set up software up to copy 
> the email to a newsgroup.

There's a list?

>                           Fortunately, as you said, the email gave him 
> permission to do that otherwise the entire legal profession might have 
> collapsed under its own weight.

:-)

Not seeing a down side to that.

But it brings up and interesting point.

Is automatic email to newsgroup software now defunct?

What if the disclaimer were better written and it forbade such an action?


Steven
-- 
 .''`.
: :'  :
`. `'`
  `-


From steve at REMOVEME.cybersource.com.au  Mon Jan 15 22:42:35 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 16 Jan 2007 14:42:35 +1100
Subject: assert versus print [was Re: The curious behavior of
	integer	objects]
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
	<mailman.2744.1168901460.32031.python-list@python.org>
	<pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>
	<76fd5acf0701151838l1a724be5n3f1e1fda629d1464@mail.gmail.com>
	<mailman.2762.1168916788.32031.python-list@python.org>
Message-ID: <pan.2007.01.16.03.42.32.179793@REMOVEME.cybersource.com.au>

On Mon, 15 Jan 2007 21:01:35 -0600, Ron Adam wrote:


> There have been times where I would like assert to be a little more assertive 
> than it is.  :-)
> 
> ie.. not being able to turn them off with the -0/-00 switches, and having them 
> generate a more verbose traceback.

If you want something more verbose, you have it:

>>> assert False, "verbose traceback"
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AssertionError: verbose traceback

If you want something that won't be turned off by -O, you maybe need to
write your own:

def assert_(condition, msg=""):
    if not condition:
        raise AssertionError(msg)

> Maybe have an alternative 'warn' as an alternative debugging version that could 
> be set to ignore, soft (print to log), and hard (raise an error).

Check out the warnings module.


-- 
Steven D'Aprano 



From yuxi at ece.gatech.edu  Mon Jan 22 09:46:57 2007
From: yuxi at ece.gatech.edu (Yu-Xi Lim)
Date: Mon, 22 Jan 2007 09:46:57 -0500
Subject: Getting to an SSH account over a HTTP proxy
In-Reply-To: <51jt71F1k884hU1@mid.uni-berlin.de>
References: <mailman.2985.1169469575.32031.python-list@python.org>
	<51jt71F1k884hU1@mid.uni-berlin.de>
Message-ID: <ep2iou$r4n$1@news-int2.gatech.edu>

Diez B. Roggisch wrote:
> BJ?rn Lindqvist wrote:
> 
>> I want to use Python to connect to a SSH account over a HTTP proxy to
>> automate some operations. I thought paramiko would be able to do that,
>> but it can not (it seems).
>>
>> Is there some other Python module that can do what I want?
> 
> Is there anything that can do what you want? Last time I checked there is no
> such thing as SSH-over-HTTP. Are you sure that is possible?

He's referring to the HTTP CONNECT method, which can tunnel arbitrary 
TCP connections, not just HTTP. The IETF draft for this is titled 
"Tunneling TCP based protocols through Web proxy servers".

AFAIK, there are no Python modules which support that. The protocol 
itself is fairly simply though, so it shouldn't be too hard to write 
your own wrapper or proxy for the client side. Things get a little more 
complicated if you have to authenticate with the proxy first.



From sjmachin at lexicon.net  Wed Jan 10 07:31:34 2007
From: sjmachin at lexicon.net (John Machin)
Date: 10 Jan 2007 04:31:34 -0800
Subject: pyExcelerator big integer values
In-Reply-To: <1168422401.594651.278390@i39g2000hsf.googlegroups.com>
References: <1168349446.381187.65810@11g2000cwr.googlegroups.com>
	<45a42e7c@news.eftel.com>
	<1168422401.594651.278390@i39g2000hsf.googlegroups.com>
Message-ID: <1168432294.206654.308670@77g2000hsv.googlegroups.com>


Gacha wrote:
> Thank you, the repr() function helped me a lot.
>
> v = unicode(values[(row_idx, col_idx)])
> if v.endswith('e+12'):
>     v = repr(values[(row_idx, col_idx)])

That endswith() looks rather suspicious ... what if it's +11 or +13,
and shouldn't it have a zero in it, like "+012" ??

Here's a possible replacement -- I say possible because you have been
rather coy about what you are actually trying to do.

value = values[(row_idx, col_idx)])
if isinstance(value, float):
    v = repr(value)
else:
    v = unicode(value)

HTH
John



From duncan.booth at invalid.invalid  Tue Jan 16 06:51:06 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 Jan 2007 11:51:06 GMT
Subject: html + javascript automations = [mechanize + ?? ] or something
	else?
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
Message-ID: <Xns98BA77047A4C8duncanbooth@127.0.0.1>

"John" <weekender_ny at yahoo.com> wrote:

> Is there a way
> to control a browser like firefox from python itself? How about IE?

IE is easy enough to control and you have full access to the DOM:

>>> import win32com
>>> win32com.client.gencache.EnsureModule('{EAB22AC0-30C1-11CF-A7EB-
0000C05BAE0B}', 0, 1, 1)
<module 'win32com.gen_py.EAB22AC0-30C1-11CF-A7EB-0000C05BAE0Bx0x1x1' from 
'C:\Python25\lib\site-packages\win32com\gen_py\EAB22AC0-30C1-11CF-A7EB-
0000C05BAE0Bx0x1x1.py'>
>>> IE = win32com.client.DispatchEx('InternetExplorer.Application.1')
>>> dir(IE)
['CLSID', 'ClientToWindow', 'ExecWB', 'GetProperty', 'GoBack', 'GoForward', 
'GoHome', 'GoSearch', 'Navigate', 'Navigate2', 'PutProperty', 
'QueryStatusWB', 'Quit', 'Refresh', 'Refresh2', 'ShowBrowserBar', 'Stop', 
'_ApplyTypes_', '__call__', '__cmp__', '__doc__', '__getattr__', 
'__init__', '__int__', '__module__', '__repr__', '__setattr__', '__str__', 
'__unicode__', '_get_good_object_', '_get_good_single_object_', '_oleobj_', 
'_prop_map_get_', '_prop_map_put_', 'coclass_clsid']
>>> IE.Visible=True
>>> IE.Navigate("http://plone.org")
>>> while IE.Busy: pass

>>> print IE.Document.getElementById("portlet-news").innerHTML
<DT class=portletHeader><A class="feedButton link-plain" 
href="feed://plone.org/news/newslisting/RSS"><IMG title="RSS subscription 
feed for news items" alt=RSS src="http://plone.org/rss.gif"> </A><A 
href="http://plone.org/news">News</A> </DT>

... and so on ...


See 
http://msdn.microsoft.com/workshop/browser/webbrowser/reference/objects/int
ernetexplorer.asp
for the documentation.


From bdesth.quelquechose at free.quelquepart.fr  Wed Jan 24 16:58:42 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 24 Jan 2007 22:58:42 +0100
Subject: Static variables
In-Reply-To: <fVPth.1713$G23.1170@newsreading01.news.tds.net>
References: <ep8gkl$g7v$3@news.in.tum.de>
	<fVPth.1713$G23.1170@newsreading01.news.tds.net>
Message-ID: <45b7cfd4$0$16160$426a74cc@news.free.fr>

Neil Cerutti a ?crit :
> On 2007-01-24, Florian Lindner <Florian.Lindner at xgm.de> wrote:
> 
>>does python have static variables? I mean function-local
>>variables that keep their state between invocations of the
>>function.
> 
> 
> Yup.  Here's a nice way. I don't how recent your Python must be
> to support this, though.
> 
> 
>>>>def foo(x):
> 
> ...   print foo.static_n, x
> ...   foo.static_n += 1
> ...
> 
>>>>foo.static_n = 0

Yup,I had forgotten this one. FWIW, it's an old trick.

There's also the closure solution:

def make_foo(start_at=0):
   static = [start_at]
   def foo(x):
     print static[0], x
     static[0] += 1
   return foo

foo = make_foo()

And this let you share state between functions:

def make_counter(start_at=0, step=1):
   count = [start_at]
   def inc():
     count[0] += step
     return count[0]
   def reset():
     count[0] = [start_at]
     return count[0]
   def peek():
     return count[0]

   return inc, reset, peek

foo, bar, baaz = make_counter(42, -1)
print baaz()
for x in range(5):
    print foo()
print bar()
print baaz()



From citronelu at yahoo.com  Mon Jan  8 14:25:00 2007
From: citronelu at yahoo.com (citronelu at yahoo.com)
Date: 8 Jan 2007 11:25:00 -0800
Subject: Execute binary code
Message-ID: <1168284300.638111.191440@38g2000cwa.googlegroups.com>

Is it possible to execute a binary string stored within a python script
as executable code ?

The script is run under Windows, and the binary code (a full executable
file) is stored in a variable in the script.

I know I can use os.system() or os.popen() to run an external file, but
these functions take as argument a string evaluated as command-line.

I also know I could save the binary code as a temporary file, execute
it and delete it afterwards, but this is not an alternative.

Thanks.



From arkanes at gmail.com  Fri Jan 12 13:31:54 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 12 Jan 2007 12:31:54 -0600
Subject: parsing a file name
In-Reply-To: <1168626221.581533.128750@s34g2000cwa.googlegroups.com>
References: <1168622211.188972.179680@38g2000cwa.googlegroups.com>
	<mailman.2656.1168625795.32031.python-list@python.org>
	<1168626221.581533.128750@s34g2000cwa.googlegroups.com>
Message-ID: <4866bea60701121031w479f64d2p56f2a9561b972a47@mail.gmail.com>

On 12 Jan 2007 10:23:41 -0800, Paul Boddie <paul at boddie.org.uk> wrote:
> Chris Mellon wrote:
> >
> > I'm trying to think of a good reason to extract the version from the
> > filename instead of using RPM to get the real version from the
> > metadata and I can't come up with one.
>
> The inquirer doesn't have any RPM handling tools installed/available or
> is dealing with a lot of versioned filenames which might be a selection
> of different, arbitrary formats.
>
> Try harder! ;-)
>
> Paul

Well, the answer to the first is "get some", so that's not a good
reason. And the second would mean that they asked a question on c.l.p
without giving all the background information on the task they were
doing, and we know that never happens.


From rweth at cisco.com  Sun Jan  7 03:51:15 2007
From: rweth at cisco.com (rweth)
Date: Sun, 07 Jan 2007 00:51:15 -0800
Subject: How to invoke parent's method?
In-Reply-To: <1168138626.574514.102060@i15g2000cwa.googlegroups.com>
References: <1168138626.574514.102060@i15g2000cwa.googlegroups.com>
Message-ID: <1168159875.980990@sj-nntpcache-1.cisco.com>

many_years_after wrote:
> Hi, pythoners:
> 
>      My wxPython program includes  a panel whose parent is a frame. The
> panel has a button. When I click the button , I want to let the frame
> destroy. How to implement it? Could the panel invoke the frame's
> method?
> Thanks.
> 
I think it "could" if what I read recently in:
    http://www.python.org/download/releases/2.2/descrintro/#cooperation
Is applicable.

    Look at the link "Cooperative methods and super"
    Write a subclass of panel where the target method of it's parent
    is targX (that parent method of Frame that you want to call)

      class myPanel (Panel):
        def dadsX (self):
           Frame.targX(self)


     I think you are forced to invoke this within a method of the Class
     itself, as opposed to doing so with an instance.

Good luck!




From nospam at domain.tld  Thu Jan 25 01:56:35 2007
From: nospam at domain.tld (Stephan Kuhagen)
Date: Thu, 25 Jan 2007 07:56:35 +0100
Subject: Python does not play well with others
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<xqxirex3psq.fsf@cola3.ca.boeing.com>
	<mailman.3110.1169668391.32031.python-list@python.org>
	<egYth.15027$w91.6162@newsread1.news.pas.earthlink.net>
Message-ID: <ep9kb3$aat$1@kohl.informatik.uni-bremen.de>

Dennis Lee Bieber wrote:

> Uhm... Unless something has happened that I don't know about, isn't
> C# a M$ specific product?

Mono?

Regards
Stephan


From sjdevnull at yahoo.com  Fri Jan  5 23:57:40 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 5 Jan 2007 20:57:40 -0800
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1168041434.385029.55870@38g2000cwa.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<1168041434.385029.55870@38g2000cwa.googlegroups.com>
Message-ID: <1168059460.614853.193090@q40g2000cwq.googlegroups.com>

Patrick Down wrote:
> jeremito wrote:
> > I am writing a class that is intended to be subclassed.  What is the
> > proper way to indicate that a sub class must override a method?
> >
> > Thanks,
> > Jeremy
>
> Decorators to the rescue?
>
> def must_override(f):
>     def t(*args):
>         raise NotImplementedError("You must override " + f.__name__)
>     return t
>
> class Foo:
>     @must_override
>     def Bar(x,y): pass
>
> Foo().Bar()
>
> Traceback (most recent call last):
>   File "testit.py", line 14, in ?
>     Foo().Bar()
>   File "testit.py", line 5, in t
>     raise NotImplementedError("You must override " + f.__name__)
> NotImplementedError: You must override Bar

I'd think twice before using a decorator.  This just seems less clear
to read than simply raising NotImplementedError, and the traceback
points into the decorator instead of the function that you really care
about.



From eurleif at ecritters.biz  Mon Jan 29 00:40:06 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Mon, 29 Jan 2007 00:40:06 -0500
Subject: Convert from unicode chars to HTML entities
In-Reply-To: <pan.2007.01.29.05.13.04.686937@REMOVEME.cybersource.com.au>
References: <pan.2007.01.29.03.05.23.166735@REMOVEME.cybersource.com.au>
	<45bd7a82$0$17928$4d3efbfe@news.sover.net>
	<pan.2007.01.29.05.13.04.686937@REMOVEME.cybersource.com.au>
Message-ID: <45bd8849$0$17928$4d3efbfe@news.sover.net>

Steven D'Aprano wrote:
> A few issues:
> 
> (1) It doesn't seem to be reversible:
> 
>>>> '&#169; and many more...'.decode('latin-1')
> u'&#169; and many more...'
> 
> What should I do instead?

Unfortunately, there's nothing in the standard library that can do that, 
as far as I know. You'll have to write your own function. Here's one 
I've used before (partially stolen from code in Python patch #912410 
which was written by Aaron Swartz):

from htmlentitydefs import name2codepoint
import re

def _replace_entity(m):
     s = m.group(1)
     if s[0] == u'#':
         s = s[1:]
         try:
             if s[0] in u'xX':
                 c = int(s[1:], 16)
             else:
                 c = int(s)
             return unichr(c)
         except ValueError:
             return m.group(0)
     else:
         try:
             return unichr(name2codepoint[s])
         except (ValueError, KeyError):
             return m.group(0)

_entity_re = re.compile(r"&(#?[xX]?(?:[0-9a-fA-F]+|\w{1,8}));")
def unescape(s):
     return _entity_re.sub(_replace_entity, s)

> (2) Are XML entities guaranteed to be the same as HTML entities?

XML defines one entity which doesn't exist in HTML: &apos;. But 
xmlcharrefreplace only generates numeric character references, and those 
should be the same between XML and HTML.

> (3) Is there a way to find out at runtime what encoders/decoders/error
> handlers are available, and what they do? 

 From what I remember, that's not possible because the codec system is 
designed so that functions taking names are registered instead of the 
names themselves. But all of the standard codecs are documented at 
<http://python.org/doc/current/lib/standard-encodings.html>, and all of 
the standard error handlers are documented at 
<http://python.org/doc/current/lib/codec-base-classes.html>.


From fsckedagain at gmail.com  Wed Jan 17 12:18:42 2007
From: fsckedagain at gmail.com (fscked)
Date: 17 Jan 2007 09:18:42 -0800
Subject: XLM prolgoue
Message-ID: <1169054322.500863.313660@11g2000cwr.googlegroups.com>

How do I go about creating the XML prologue like I want it to be?
Specifically, I am trying to add encoding and some namespace stuff.



From gdamjan at gmail.com  Wed Jan 24 19:40:09 2007
From: gdamjan at gmail.com (Damjan)
Date: Thu, 25 Jan 2007 01:40:09 +0100
Subject: Question about docutils
Message-ID: <45b7fca1$0$49206$14726298@news.sunsite.dk>

I'm using docutils 0.4.
Is it possible to define special custom 'tags' (or something) that will
invoke my own function? The function would then return the real content in
the ReST document.

-- 
damjan


From hg at nospam.org  Fri Jan  5 06:16:42 2007
From: hg at nospam.org (hg)
Date: Fri, 05 Jan 2007 12:16:42 +0100
Subject: Undefined symbol __pure_virtual when importing MySQLdb
References: <1167977378.425615.220350@51g2000cwl.googlegroups.com>
Message-ID: <5Cwnh.47481$gl2.933@newsfe16.lga>

antonyliu2002 at yahoo.com wrote:

> I downloaded MySQL-python-1.2.1 from SourceForge and installed it on a
> Mandrake system (Mandrake Linux 9.2 3.3.1-2mdk on linux2).
> 
> The installation was successful.  The gcc version is 3.3.
> 
> My Python version is 2.4.2.  When I import MySQLdb, I get an error
> which says that __pure_virtual is an undefined symbol.
> 
> Look:
> 
>>>> import MySQLdb
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/local/python2.4/site-packages/MySQLdb/__init__.py", line
> 19, in ?
>     import _mysql
> ImportError: /usr/local/python2.4/site-packages/_mysql.so: undefined
> symbol: __pure_virtual
> 
> By the way, mysql (5.0.27-standard)is running OK on the Mandrake
> system. Look:
> 
> [antonyliu at myhost antonyliu]$ mysql -u root -p
> Enter password:
> Welcome to the MySQL monitor.  Commands end with ; or \g.
> Your MySQL connection id is 13 to server version: 5.0.27-standard
> 
> Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
> 
> mysql>
> 
> I have googled hard, and did see someone asking the same question, but
> haven't found a good solution to this problem.  Could anyone give me a
> hint?  Thanks a lot!


Hi,

I can only say that it runs fine under Mandriva 2007 ... and that Mandriva
went to gcc V4 long after 9.2 ... maybe an issue here.

Regards,

hg



From wolf_tracks at invalid.com  Wed Jan 24 16:06:35 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Wed, 24 Jan 2007 21:06:35 GMT
Subject: Python Windows Editors
In-Reply-To: <ea71a$45b5141c$d443bb3a$3908@news.speedlinq.nl>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<ep33ul$6cr$1@atlantis.news.tpi.pl>
	<ea71a$45b5141c$d443bb3a$3908@news.speedlinq.nl>
Message-ID: <vTPth.66062$qO4.37323@newssvr13.news.prodigy.net>

Stef Mientki wrote:
>  Any text editor is only as good as the
>> programmer who uses it. ;)
>>
> Yes but an IDE is different ;-)
> 
> cheers,
> Stef Mientki
Correct.


          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

          "Depend upon it, there is nothing so unnatural as the
           commonplace." -- Sherlock Holmes, in "A Case of Identity"
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From laurent.pointal at limsi.fr  Fri Jan 12 05:06:52 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 12 Jan 2007 11:06:52 +0100
Subject: pygame and python 2.5
In-Reply-To: <eo7jji$61nu$1@zam602.zam.kfa-juelich.de>
References: <eo7jji$61nu$1@zam602.zam.kfa-juelich.de>
Message-ID: <eo7nca$7cf$1@upsn250.cri.u-psud.fr>

siggi a ?crit :
> Hi all,
> 
> when I rtry to install pygame (pygame-1.7.1release.win32-py2.4.exe, the most
> ciurrent version I found) it requires Python 2.4! Will I really have to
> uninstall my Python 2.5  and install the old Python 2.4 in order to use
> pygame?

Note: You can have both versions installed, just be sure to use the
right one when using pygame (until there is a 2.5 compatible version).



From __peter__ at web.de  Thu Jan 25 12:18:52 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 25 Jan 2007 18:18:52 +0100
Subject: Two dimensional lists
References: <mailman.3155.1169742275.32031.python-list@python.org>
Message-ID: <epaop4$2uh$02$1@news.t-online.com>

gonzlobo wrote:

> I might get an answer since I didn't call them arrays. :^)
> 
> Ok, I have 2 lists that I need to process individually, then merge
> them into a 2x list and fill with data.
> 
> arinc429 = ['ab', '2b', '0b', '21', 'c1', '61', '11', 'db', '9b', '5b',
> 'eb',
>          '6b', '1b', '6e', '3e']
> iPIDs = [300, 301, 320, 321]
> 
> merged[arinc429, iPIDs]
> 
> # PID & a429 are defined elsewhere
> 
> a_idx = iPIDs.index[PID]
> p_idx = [arinc429.index[a429]
> 
> # shouldn't I be able to fill the lists simply by pointing to a location?
> 
> matrix[a_idx, p_idx] = 0x219 # and so on?

The simplest approach is to go with a dictionary:

>>> matrix = {}
>>> arinc = ['ab', '2b', '0b']
>>> pids = [300, 321]
>>> for x in arinc:
...     for y in pids:
...         matrix[x, y] = y + int(x, 16) # replace with your actual data 
...
>>> matrix
{('ab', 300): 471, ('2b', 300): 343, ('ab', 321): 492, ('0b', 321): 332,
('2b', 321): 364, ('0b', 300): 311}

Get one entry:

>>> matrix["2b", 321]
364

Get all items along an axis:

>>> [matrix[x, 300] for x in arinc]
[471, 343, 311]

Peter


From __peter__ at web.de  Thu Jan 25 07:39:08 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 25 Jan 2007 13:39:08 +0100
Subject: While loop with "or"? Please help!
References: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
	<45b8a31d$0$2401$426a74cc@news.free.fr>
Message-ID: <epa8cl$vl0$02$1@news.t-online.com>

Bruno Desthuilliers wrote:

> and simplified again thanks to Python 'in' operator:
> while?not?usrinp.lower()?in?"yn":

But note that 'in' performs a substring search and therefore "yn" and ""
would be accepted as valid answers, too.

Peter 



From robert.kern at gmail.com  Tue Jan  9 16:11:33 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 09 Jan 2007 15:11:33 -0600
Subject: distutils and ctypes
In-Reply-To: <45A3FF17.2070509@v.loewis.de>
References: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>
	<45A3FF17.2070509@v.loewis.de>
Message-ID: <eo10eg$dmv$1@sea.gmane.org>

Martin v. L?wis wrote:

> Not sure it's stupid, but I wonder why you want to use ctypes. What's
> wrong with extension modules?

What's wrong with ctypes? They're both valid, useful approaches to connect to C
libraries.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From sickcodemonkey at gmail.com  Tue Jan 30 08:49:47 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Tue, 30 Jan 2007 08:49:47 -0500
Subject: Diff between opening files in 'r' and 'r+' mode
In-Reply-To: <1170149775.253373.318960@q2g2000cwa.googlegroups.com>
References: <1170149775.253373.318960@q2g2000cwa.googlegroups.com>
Message-ID: <2adc542f0701300549h740dc90ar1ab1b898ff8787c6@mail.gmail.com>

It was a little hard to follow your logic of your sample code (writing,
reading and writing again), but
(1)The difference between r and r+.....
-  'r+' opens the file for both reading and writing.
-  'r' should be used when the file will only be read.

I am not sure on how you want to store the contents of the file, but I have
provided an example below. You could do something like this:
----------------------------------------------------------------------
fileContent = open(fname, 'r')

a = fileContent.readlines(); fileContent.close()

print a

----------------------------------------------------------------------

(2) If you are just going to read the file, then yes I would use just the
'r' argument.



On 30 Jan 2007 01:36:15 -0800, raghu <vgvr620034 at gmail.com> wrote:
>
> i want to know the difference between 'r' mode and 'r+' mode
> 1.i = open('c:\python25\integer.txt','w')-------->for writiing
> i.write('hai')--------->written some content in text file
> i = open('c:\python25\integer.txt','r')---->for reading
> print i.read()---->for printing the contents in that text file
> i = open('c:\python25\integer.txt','w')---------->for writing
> i.write('how')-----------?Rewrite the contents
> print i.read()
> [MY QUESTION]:i want to read the text file contents cant it be done by
> giving (print i.read())?
> Before going to next question [I deleted all the contents in the text
> file]
>
> 2.i = open('c:\python25\integer.txt','r+')-----For reading and writing
>   i.write('hai')--------->written some content  to text file
>   print i.read()--------->
{?
?
('c:\python25\integer.txt','w')
>                               i write('')
>                               print i.read()how')
>                               i = open('c:\python25\integer.txt','r')
>                               print i.read()
>                               i = open('c:\python25\integer.txt','w')
>                               i.write()
>                               i = open('c:\python25\integer.txt','r')
>                              print i.read() } --->Thats what i saw on
> interpreter(In curly braces) when  i ran the script
> [MY QUESTION]:1.from where the above in curly braces is printed?and i
> have written only 'hai' to the text file
>                          2.Should i recall again the opening of the
> file in 'r' mode to read the file?
>
> --
> http://mail.python.org/mailman/listinfo/python-list
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070130/cb759681/attachment.html>

From __peter__ at web.de  Thu Jan 18 03:03:48 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 18 Jan 2007 09:03:48 +0100
Subject: question about module resolution
References: <1169050133.438101.90030@a75g2000cwd.googlegroups.com>
	<eolibj$mf2$02$1@news.t-online.com>
	<1169060571.641437.297170@51g2000cwl.googlegroups.com>
Message-ID: <eon9kl$1q8$03$1@news.t-online.com>

Emin wrote:

> On Jan 17, 11:20 am, Peter Otten <__pete... at web.de> wrote:
>> Emin wrote:
>> > I often find myself wanting to have a child module get some parameters
>> > defined in a parent module. For example, imagine  I have the following
>> > directory structure and want something in baz.py to look at a value in
>> > config.py. I end up putting in things like import sys;
>> > sys.path.append('../..'). Is there a better way?
>>
>> > foo/
>> >      __init__.py
>> >      config.py
>> >      bar/
>> >           __init__.py
>> >           baz.py

>> from __future__ import absolute_import  
>> from .. import config

> I put the lines you suggested in baz.py, but got an error:
> 
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import baz
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "baz.py", line 3, in <module>
>     from .. import config
> ValueError: Attempted relative import in non-package

If you put foo/bar in the path and then

import baz

how do you think that baz is to know that it's actually foo.bar.baz?
Make sure that the parent directory of foo is in sys.path (e. g. by starting
the interpreter in that directory) and then import baz using its official
name.

$ tree
.
`-- foo
    |-- __init__.py
    |-- bar
    |   |-- __init__.py
    |   `-- baz.py
    `-- config.py

2 directories, 4 files

$ cat foo/config.py
print "importing config"

$ cat foo/bar/baz.py
from __future__ import absolute_import
from .. import config

$ python2.5
Python 2.5 (r25:51908, Oct  3 2006, 08:48:09)
[GCC 3.3.3 (SuSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import foo.bar.baz
importing config

Peter



From sickcodemonkey at gmail.com  Wed Jan 24 21:05:24 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Wed, 24 Jan 2007 21:05:24 -0500
Subject: difflib qualm
Message-ID: <2adc542f0701241805i79b79580y2522ec854e49621d@mail.gmail.com>

 I am trying to write a python script that will compare 2 files which
contains names (millions of them).

More specifically, I have 2 files (Files1.txt and Files2.txt).
Files1.txtcontains 180 thousand names and
Files2.txt contains 34 million names.

I have a script which will analyze these two files and store them into 2
different lists (fileList1 and fileList2 respectivly).  I have imported the
diflib library and after the lists are created, matching on the following
criteria " " for diflib -> (just the names that are similar between the two
files).

This works perfectly for hundreds of names but is taking forever for
millions of them; thus not really efficient.

Does anyone have any idea on how to get this more efficient?  (speaking of
Time and RAM)

Any advice would be greatly appreciated.   (NOTE:  I have been trying to
study multithreading, but have not really grasp the concept.  So I may need
some examples.)

~~~~~~~~~~~~~~
S.C.M.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070124/ecb7fbb8/attachment.html>

From skip at pobox.com  Mon Jan 15 11:45:20 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 15 Jan 2007 10:45:20 -0600
Subject: How naive is Python?
In-Reply-To: <17835.39437.115750.617750@montanaro.dyndns.org>
References: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>
	<mailman.2724.1168834095.32031.python-list@python.org>
	<1168848408.785931.285160@q2g2000cwa.googlegroups.com>
	<17835.39437.115750.617750@montanaro.dyndns.org>
Message-ID: <17835.44960.196267.242474@montanaro.dyndns.org>


    John> Sorry, Skip, but I find that very hard to believe. The foo()
    John> function would take quadratic time if it were merely adding on
    John> pieces of constant size -- however len(str(i)) is not a constant,
    John> it is O(log10(i)), so the time should be super-quadratic.

    me> Sorry, I should have pointed out that I'm using the latest version
    me> of Python.  I believe += for strings has been optimized to simply
    me> extend s when there is only a single reference to it.

Actually, it isn't until I work my way back to 2.3 that I start to see
quadratic behavior:

    % python2.6 strcopy.py 
    32 0.00022292137146 6.96629285812e-06
    64 0.000907897949219 1.41859054565e-05
    128 0.000649929046631 5.0775706768e-06
    256 0.00111794471741 4.36697155237e-06
    512 0.00260806083679 5.09386882186e-06
    1024 0.00437998771667 4.27733175457e-06
    2048 0.00921607017517 4.50003426522e-06
    4096 0.0191979408264 4.68699727207e-06
    8192 0.0694131851196 8.47328919917e-06
    16384 0.0976829528809 5.96209429204e-06
    32768 0.194766998291 5.94381708652e-06
    % python2.5 strcopy.py 
    32 0.000439167022705 1.37239694595e-05
    64 0.000303030014038 4.73484396935e-06
    128 0.000631809234619 4.93600964546e-06
    256 0.00112318992615 4.38746064901e-06
    512 0.00279307365417 5.45522198081e-06
    1024 0.00446391105652 4.35928814113e-06
    2048 0.00953102111816 4.65381890535e-06
    4096 0.0198018550873 4.83443727717e-06
    8192 0.175454854965 2.14178289752e-05
    16384 0.103327989578 6.30663998891e-06
    32768 0.191411972046 5.84142981097e-06
    % python2.4 strcopy.py 
    32 0.000230073928833 7.18981027603e-06
    64 0.000307083129883 4.79817390442e-06
    128 0.00114107131958 8.91461968422e-06
    256 0.00116014480591 4.53181564808e-06
    512 0.00231313705444 4.51784580946e-06
    1024 0.00459003448486 4.48245555162e-06
    2048 0.00974178314209 4.75673004985e-06
    4096 0.019122838974 4.66866185889e-06
    8192 0.0717267990112 8.75571276993e-06
    16384 0.112125873566 6.84362021275e-06
    32768 0.188065052032 5.73928991798e-06
    % python2.3 strcopy.py 
    32 0.000223875045776 6.99609518051e-06
    64 0.000385999679565 6.03124499321e-06
    128 0.000766038894653 5.98467886448e-06
    256 0.00154304504395 6.02751970291e-06
    512 0.00309181213379 6.03869557381e-06
    1024 0.0065929889679 6.43846578896e-06
    2048 0.0147500038147 7.20215030015e-06
    4096 0.14589214325 3.56181990355e-05
    8192 0.778324127197 9.50102694333e-05
    16384 3.20213103294 0.000195442567929
    32768 14.7389230728 0.000449796236353
    % python2.2 strcopy.py
    32 0.00031590461731 9.87201929092e-06
    64 0.000494003295898 7.71880149841e-06
    128 0.00090217590332 7.04824924469e-06
    256 0.00173211097717 6.76605850458e-06
    512 0.00362610816956 7.08224251866e-06
    1024 0.00711607933044 6.94929622114e-06
    2048 0.0158200263977 7.7246222645e-06
    4096 0.152237892151 3.71674541384e-05
    8192 0.89648604393 0.000109434331534
    16384 3.14483094215 0.000191945247934
    32768 13.3367011547 0.000407003819419

Skip


From gagsl-py at yahoo.com.ar  Sun Jan  7 17:38:38 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 14:38:38 -0800
Subject: strange for loop construct
In-Reply-To: <1168206762.164747.299470@42g2000cwt.googlegroups.com>
References: <1168029548.217679.251230@q40g2000cwq.googlegroups.com>
	<mailman.2347.1168030198.32031.python-list@python.org>
	<12ptf5bl21f2teb@corp.supernews.com>
	<1168206762.164747.299470@42g2000cwt.googlegroups.com>
Message-ID: <1168209518.288765.39380@s80g2000cwa.googlegroups.com>

On 7 ene, 18:52, "Dustan" <DustanGro... at gmail.com> wrote:

> Shouldn't that same page be found on the python website?http://www.python.org/doc/2.0/
> Any clue as to why it isn't?

For 2.0 it's on
http://www.python.org/download/releases/2.0/new-python.htm
For later ones, it's on
http://www.python.org/download/releases/2.5/NEWS.txt (replacing 2.5 as
desired)
You can use google with site:www.python.org (or the Search box in the
Python web) to locate them.

-- 
Gabriel Genellina



From robin at reportlab.com  Wed Jan 17 11:05:23 2007
From: robin at reportlab.com (Robin Becker)
Date: Wed, 17 Jan 2007 16:05:23 +0000
Subject: 2.3-2.5 what improved?
In-Reply-To: <1169038574.260669.194760@s34g2000cwa.googlegroups.com>
References: <mailman.2817.1169029744.32031.python-list@python.org>
	<1169038574.260669.194760@s34g2000cwa.googlegroups.com>
Message-ID: <45AE4943.3080700@chamonix.reportlab.co.uk>

bruno.desthuilliers at gmail.com wrote:
> Robin Becker a ?crit :
>........
> 
> AFAIK, most of the speedup comes from optimization of the builtin dict
> type, which is the central
> data structure in Python. But anyway, as Robert pointed out, using CGI
> means lauching
> a new Python process for each and every HTTP request.
> 
>> Presumably we have a lot of old
>> cruft that could be improved in some way eg moving loops into comprehensions,
>> using iterator methods etc. Are those sort of things what we should look at?
> 
> Consider profiling your code before doing anything else - unless you're
> planning on wasting your time.

our major show stoppers(stuff like stringWidth) are already in C; the remainder 
are rather complex methods to do things like paragraph splitting. We're already 
considering fcgi to eliminate the startup time. A trial with psyco indicates 
another 15% could be obtained there, but I don't think we can use that on the 
target platform (which I think is sparc).
-- 
Robin Becker



From __peter__ at web.de  Tue Jan 16 03:42:43 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 16 Jan 2007 09:42:43 +0100
Subject: for v in l:
References: <mailman.2759.1168908488.32031.python-list@python.org>
Message-ID: <eoi35m$kql$00$1@news.t-online.com>

Gert Cuykens wrote:

> is there a other way then this to loop trough a list and change the values
> 
>         i=-1
>         for v in l:
>                 i=i+1
>                 l[i]=v+x
> 
> something like
> 
>         for v in l:
>                 l[v]=l[v]+x

Be generous, create a new list:

items = [value + delta for value in items]

That will require some extra peak memory, but is faster.
Also, code relying on lists not being changed in place tends to be more
robust (and better looking) than code relying on lists being changed in
place :-)

If you cannot rebind the list variable, use slices:

items[:] = [value + delta for value in items]

If the list is huge and you have to economize memory, use enumerate():

for index, value in enumerate(items):
   items[index] = value + delta

Peter


From michele.simionato at gmail.com  Sat Jan 27 01:09:50 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 26 Jan 2007 22:09:50 -0800
Subject: instancemethod
In-Reply-To: <pan.2007.01.27.05.39.16.304099@REMOVE.THIS.cybersource.com.au>
References: <ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a@mail.gmail.com>
	<ep110v$t04$1@sea.gmane.org>
	<ef60af090701211712u4d5a520q84c8e86c898bc649@mail.gmail.com>
	<mailman.2973.1169431114.32031.python-list@python.org>
	<1169872049.261689.263820@j27g2000cwj.googlegroups.com>
	<pan.2007.01.27.05.39.16.304099@REMOVE.THIS.cybersource.com.au>
Message-ID: <1169878190.392229.277600@k78g2000cwa.googlegroups.com>

On Jan 27, 6:39 am, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
>
> It seems that the description of __new__ is wrong. Since __new__ takes an
> implicit first argument, the class, it is a class method, not a static
> method.

No:

>>> class C(object):
...    def __new__(cls): pass

>>> C.__dict__['__new__']
<staticmethod object at 0xb7ad42cc>

Moreover, citing from
http://www.python.org/download/releases/2.2.3/descrintro/#staticmethods

"""
    * Factoid: __new__ is a static method, not a class method. I
initially thought it would have to be a class method, and that's why I
added the classmethod primitive. Unfortunately, with class methods,
upcalls don't work right in this case, so I had to make it a static
method with an explicit class as its first argument. Ironically, there
are now no known uses for class methods in the Python distribution
(other than in the test suite). However, class methods are still useful
in other places, for example, to program inheritable alternate
constructors. 
"""

So, I stand my point.

          Michele Simionato



From toby at tobiah.org  Mon Jan 22 15:44:55 2007
From: toby at tobiah.org (Tobiah)
Date: Mon, 22 Jan 2007 12:44:55 -0800
Subject: AES and Credit card number encryption 
Message-ID: <45b5159e$0$24377$88260bb3@free.teranews.com>

I browsed this subject and thought I might use the
'AES' cypher scheme to do this.  Would this be
a good choice?

I came across a "Python Cryptography Toolkit"

http://www.amk.ca/python/code/crypto

which has a nice AES implementation, but in
the example, a simple string is passed as the
key:

obj=AES.new('abcdefgh', AES.ECB)

So my real question is, how do I go about
generating the best key.  Isn't the length
supposed to be a 2^n bits, and soforth?

Thanks,

Tobiah

-- 
Posted via a free Usenet account from http://www.teranews.com



From ptmcg at austin.rr.com  Tue Jan 23 20:33:31 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 23 Jan 2007 17:33:31 -0800
Subject: Simple Matrix class
In-Reply-To: <mailman.3049.1169600368.32031.python-list@python.org>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>
	<mailman.3049.1169600368.32031.python-list@python.org>
Message-ID: <1169602411.917985.89840@l53g2000cwa.googlegroups.com>

On Jan 23, 6:59 pm, Robert Kern <robert.k... at gmail.com> wrote:
> Paul McGuire wrote:
> > I've posted a simple Matrix class on my website as a small-footprint
> > package for doing basic calculations on matrices up to about 10x10 in
> > size (no theoretical limit, but performance on inverse is exponential).
>
> Why is that? A simple and robust LU decomposition should be no more than O(n**3).
>
> --
> Robert Kern

Well "3" is an exponent isn't it? :)

In truth, in my laziness, I didn't *actually* test the performance.
But after measuring inversion times for nxn matrices for n=2 to 12, I
get these results (run on Python 2.4.2, on a 2GHz CPU):

n  seconds                ln(seconds)
2 0.000411225449045 -7.79636895604
3 0.00102247632031 -6.88552782893
4 0.00437541642862 -5.43175358002
5 0.0146999129778 -4.21991370509
6 0.0507813143849 -2.98022681913
7 0.143077961026 -1.94436561528
8 0.39962257773 -0.917234732978
9 1.14412558021 0.134640659841
10 3.01953516439 1.10510290046
11 8.76039971561 2.17024153354
12 21.8032182861 3.0820575867

Plotting n vs. ln(seconds) gives a fairly straight line of slope about
1.09, and exp(1.09) = 2.97, so your big-O estimate seems to line up
nicely with the experimental data - I couldn't have fudged it any
better.

-- Paul



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Jan 26 11:25:37 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 26 Jan 2007 17:25:37 +0100
Subject: instancemethod
In-Reply-To: <mailman.3041.1169586704.32031.python-list@python.org>
References: <mailman.2961.1169417800.32031.python-list@python.org>	<45b51298$0$8289$426a74cc@news.free.fr>	<ef60af090701221255m575701e7jaae6bd858acbea5c@mail.gmail.com>	<dea92f560701230608p469d5937ya658e2bb234c4941@mail.gmail.com>
	<mailman.3041.1169586704.32031.python-list@python.org>
Message-ID: <45ba2b72$0$3007$426a34cc@news.free.fr>

Gert Cuykens a ?crit :
> import MySQLdb
> 
> class Db(object):
> 
>    def __enter__(self):
>        pass
> 
>    def __init__(self,server,user,password,database):
>        self._db=MySQLdb.connect(server , user , password , database)
>        self._db.autocommit(True)
>        self.cursor=self._db.cursor()
> 
>    def execute(self,cmd):
>        self.cursor.execute(cmd)
>        self.rowcount=int(self.cursor.rowcount)

isn't cursor.rowcount already an int ?

>    def close(self):
>        self.cursor.close()
>        self._db.close()
> 
>    def __getattr__(self, name):
>        attr = getattr(self._cursor, name,getattr(self._db, name,  None))
>        if attr is None:
>            raise AttributeError("object %s has no attribute %s"
> %(self.__class__.__name__, name))
>        return attr
> 
>    def __del__(self):
>        try:
>            self.close()
>        finally:
>            pass
>        except:
>            pass

The finally clause is useless here.

>    def __exit__(self):
>        pass
> 
> if __name__ == '__main__':
>    gert = Db('localhost','root','*****','gert')
>    gert.execute('select * from person')
>    for row in gert.cursor:
>        print row
> 
>    with Db('localhost','root','*****','gert') as gert:
>        gert.excecute('select * from person')
>        for row in gert.cursor:
>            print row
> 
> Desktop/svn/db/Py/db.py:45: Warning: 'with' will become a reserved
> keyword in Python 2.6
>  File "Desktop/svn/db/Py/db.py", line 45
>    with Db('localhost','root','*****','gert') as gert:
>          ^
> SyntaxError: invalid syntax
> 
> I was thinking if it would be possible to create a object that uses
> it's own instance name as a atribute.

class Obj(object):
   pass

toto = tutu = tata = titi = Obj()

What's an "instance name" ?



From steve at REMOVEME.cybersource.com.au  Mon Jan 29 00:13:05 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Mon, 29 Jan 2007 16:13:05 +1100
Subject: Convert from unicode chars to HTML entities
References: <pan.2007.01.29.03.05.23.166735@REMOVEME.cybersource.com.au>
	<45bd7a82$0$17928$4d3efbfe@news.sover.net>
Message-ID: <pan.2007.01.29.05.13.04.686937@REMOVEME.cybersource.com.au>

On Sun, 28 Jan 2007 23:41:19 -0500, Leif K-Brooks wrote:

>  >>> s = u"? and many more..."
>  >>> s.encode('ascii', 'xmlcharrefreplace')
> '&#169; and many more...'

Wow. That's short and to the point. I like it.

A few issues:

(1) It doesn't seem to be reversible:

>>> '&#169; and many more...'.decode('latin-1')
u'&#169; and many more...'

What should I do instead?


(2) Are XML entities guaranteed to be the same as HTML entities?


(3) Is there a way to find out at runtime what encoders/decoders/error
handlers are available, and what they do? 


Thanks,


-- 
Steven D'Aprano 



From steve at REMOVE.THIS.cybersource.com.au  Thu Jan 25 10:40:16 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 26 Jan 2007 02:40:16 +1100
Subject: Please have a look at this class
References: <1169735908.009109.7460@a75g2000cwd.googlegroups.com>
Message-ID: <pan.2007.01.25.15.40.15.384366@REMOVE.THIS.cybersource.com.au>

On Thu, 25 Jan 2007 06:38:28 -0800, antred wrote:

> Hello everyone,
> 
> While working on a program I encountered a situation where I'd
> construct a largish data structure (a tree) from parsing a host of
> files and would end up having to throw away parts of my newly built
> tree if a file turned out to contain invalid data.

Why not validate the file before you add it to the tree?

> My first thought was
> 'Well, you can always make a deep copy of your tree first, then add new
> data to the copy and revert to the original if you need to.", but as
> this tree can grow very big this is not exactly efficient.

My first thought would have been to just delete the invalid node from the
tree.

BTW, what sort of tree are you using? A basic binary tree, or something
more sophisticated? Deleting nodes from trees need not be expensive.


> So my second idea was to come up with a class that offers a very
> limited degree of database-like behavior, meaning you can make changes
> to the object and then decide whether you want to commit those changes
> or roll them back to get back to the original.

I don't know whether that would be a useful tool to have in general. How
do you use it? I can guess two broad strategies:

(1) commit; add; validate; commit or roll-back.

That seems wasteful, because if you're adding only a single node to the
tree, it should be *very* easy to delete it and revert to the previous
state.

Alternatively:

(2) commit; add multiple times; validate multiple items; commit the lot,
or roll-back the lot and then re-add the ones that validated.

But does it really make sense to be rolling back a whole lot of
transactions, just because one of them is faulty? I don't think so.

In this specific example, I think the right solution is to make adding and
deleting a file an atomic operation (or at least as close to atomic as
Python allows), so you don't need to think about attributes. You just add
or delete nodes. Anyway, that's the solution I'd be looking at.

[snip]

> The basic idea behind this is that each instance of the Unrollable
> class keeps an internal dictionary (which, in lieu of a better name I'm
> currently calling 'sand box') 

Bad name! "Sand box" already has an established usage, and that's not it.

A better name might be something like "provisional" or "uncommitted" or
similar.

[snip]

> Finally, this works for 'private' attributes (i.e. names with two
> leading underscores), too, as the __setattr__ implementation mangles
> the name of the attribute if it detects a private name.

I think it would be better NOT to mangle the names of the attribute, as
that defeats the purpose of name mangling in the first place. If the user
of your code wants to muck about with private variables, then he should
mangle the name before passing it to your code.


[snip]

> class Unrollable( object ):
> 	"""Provides a very simple commit/rollback system."""
> 
> 	def __setattr__( self, attributeName, attributeValue ):
> 		"""Changes the specified attribute by setting it to the passed value.
> The change is only made to the sandbox and is not committed."""
> 
> 		if attributeName.find( '__' ) == 0:
> 			# Mangle name to make attribute private.
> 			attributeName = '_' + self.__class__.__name__ + attributeName

You use mangle twice in your code -- that should be factored out as a
function or method.

Or better yet, just don't do it at all.


> 		try:
> 			theDict = self.__dict__[ '_Unrollable__dSandBox' ]
> 		except KeyError:
> 			theDict = self.__dict__[ '_Unrollable__dSandBox' ] = {}

Use this instead:

theDict = self.__dict__.setdefault('_Unrollable__dSandBox', {})



> 		theDict[ attributeName ] = attributeValue
> 
> 
> 	def __getattr__( self, attributeName ):
> 		"""This method ensures an attribute can be accessed even when it
> hasn't been committed yet (since it might not exist in the object
> 		itself yet)."""

Doesn't that defeat the purpose of having a distinct commit? If something
hasn't been committed, you shouldn't be able to access it!


[snip]

What about commits/roll-backs for deletion of attributes?


> 	def commitChanges( self ):
> 		"""Commits the contents of the sandbox to the actual object. Clears
> the sandbox."""
> 		while len( self.__dSandBox ) > 0:
> 			key, value = self.__dSandBox.popitem()
> 			self.__dict__[ key ] = value

If you change the name of your class, or subclass it, your 'sandbox' will
break. Here, you use a double-underscore name and let Python mangle it,
but earlier you hard-coded the mangled name. Do one or the other, not both.

 
> 	def unroll( self, bRecurseSandBox = True, bRecurseDict = False ):
> 		"""Ditches all changes currently in the sandbox. Recurses all objects
> in the instance itself and in its sandbox and, if
> 		they're unrollable instances themselves, invokes the unroll method on
> them as well."""

But if you're ditching the objects in the 'sandbox', why would you need to
unroll them? Aren't they going to disappear?


> 		if bRecurseSandBox:
> 			while len( self.__dSandBox ) > 0:
> 				key, value = self.__dSandBox.popitem()
> 
> 				if isinstance( value, Unrollable ):
> 					value.unroll( bRecurseSandBox, bRecurseDict )
> 		else:
> 			self.__dSandBox.clear()
> 
> 		if bRecurseDict:
> 			iterator = self.__dict__.itervalues()
> 
> 			while True:
> 				try:
> 					nextVal = iterator.next()
> 				except StopIteration:
> 					break
> 
> 				if isinstance( nextVal, Unrollable ):
> 					nextVal.unroll( bRecurseSandBox, bRecurseDict )


Use this instead:


for nextVal in iterator:
    if isinstance( ... ):



> 	def hasUncommittedChanges( self ):
> 		"""Returns true if there are uncommitted changes, false otherwise."""
> 		return len( self.__dSandBox ) > 0

Which will fail if the 'sandbox' doesn't exist. In other parts of the code
you test for its existence.


Another thing... I notice that you seem to be inconsistently using a form
of the Hungarian Notation (e.g. dSandbox, bRecurseDict, etc.). I suggest
you read this for a better understanding of when you should do so: 

http://www.joelonsoftware.com/articles/Wrong.html


Hope this was helpful,



-- 
Steven.



From gagsl-py at yahoo.com.ar  Tue Jan 16 20:55:19 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 16 Jan 2007 22:55:19 -0300
Subject: How can I create a linked list in Python?
In-Reply-To: <eojb9v$92rq$1@netnews.upenn.edu>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<eojb9v$92rq$1@netnews.upenn.edu>
Message-ID: <7.0.1.0.0.20070116224531.04673008@yahoo.com.ar>

At Tuesday 16/1/2007 17:07, Dongsheng Ruan wrote:

>Thanks for your kindly help.
>I am new CS student taking datat structure and algorithms with AHO's book
>with the same title.
>
>The book is done in Pascal, which might be an outdated language.
>
>However, my instructor probably wants us to understand the list ADT better
>by not using the built in list in Python.

Just use the same structure as the book. Instead of nil, use None; 
instead of new(P) where P:^Foo, use P=Foo(); records become classes 
without methods...

Anyway, implementing linked lists, dictionaries, and other basic 
structures in a language like Pascal, or C -which doesn't have them 
natively- may be a good learning exercise. But doing that in Python 
is not a good idea. Of course, using Python in a second or third 
algorithms course *is* a good idea, because you can forget about 
these implementation details and concentrate on the algorithms.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From deets at nospam.web.de  Tue Jan 23 06:23:26 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 23 Jan 2007 12:23:26 +0100
Subject: How to instantiate a different class in a constructor?
References: <mailman.3024.1169551181.32031.python-list@python.org>
Message-ID: <51m9heF1kgf4kU1@mid.uni-berlin.de>

> I have a class URI and a bunch of derived sub-classes for example
> HttpURI, FtpURI, HttpsURI, etc. (this is an example, I know there is
> module urllib & friends, however my actual problem however maps very
> well to this example).
> 
> Now I want to pass a string to constructor of URI() and get an instance
> of one of the subclasses back. For example uri=URI('http://abcd/...')
> will make 'uri' an instance of HttpURI class, not instance of URI.
> 
> To achieve this I have a list of all subclasses of URI and try to
> instantiate one by one in URI.__new__(). In the case I pass e.g. FTP URI
> to HttpURI constructor it raises ValueError exception and I want to test
> HttpsURI, FtpURI, etc.

<snip/>


Use a factory function:

class UriBase(object):
    REGISTRY = {}

class HttpUri(UriBase):
    pass

UriBase.REGISTRY['http'] = HttpUri

def URI(arg):
    return UriBase.REGISTRY[get_protocol(arg)](arg)

This is untested and could be enhanced by e.g. using metaclasses to perform
the registration automagicall, but I think you get the idea.

Diez


From rw at smsnet.pl  Wed Jan 31 07:59:46 2007
From: rw at smsnet.pl (Rob Wolfe)
Date: 31 Jan 2007 04:59:46 -0800
Subject: Help needed on config files
In-Reply-To: <1170237893.930122.138300@v45g2000cwv.googlegroups.com>
References: <1170237893.930122.138300@v45g2000cwv.googlegroups.com>
Message-ID: <1170248385.900158.241470@v45g2000cwv.googlegroups.com>


jvdb wrote:
> Hi there,
>
> I am quite new on python programming and need some help on solving my
> problem..
>
> I have to make a (python) program which deletes files from
> directories. I don't think deleting, etc. is the problem. The problem
> is that the directories where i have to delete them are 'dynamic'/
> subject to change. So what i thought is to make a config file
> containing an identifier (useful for myself) and there the directory.
> something like:
> [PROJECTx]
> <path>
> [PROJECTy]
> <path>

What about this?

# proj.cfg
[PROJECTx]
path=/path/to/dir1
[PROJECTy]
path=/path/to/dir2

# cfg.py
from ConfigParser import ConfigParser
cfg = ConfigParser()
cfg.read("proj.cfg")
for proj in cfg.sections():
    path = cfg.items(proj)[0][1]
    print "proj: %s, path: %s" % (proj, path)

Is that not enough?

--
HTH,
Rob



From martin.witte at gmail.com  Mon Jan  8 11:19:11 2007
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 8 Jan 2007 08:19:11 -0800
Subject: sys.exit versus raise SystemExit
In-Reply-To: <45a26b70$0$32019$fa0fcedb@news.zen.co.uk>
References: <45a26b70$0$32019$fa0fcedb@news.zen.co.uk>
Message-ID: <1168273151.359419.118640@42g2000cwt.googlegroups.com>


Will McGugan wrote:
> Hi,
>
> Is there any difference between calling sys.exit() and raise SystemExit?
> Should I prefer one over the other?
>
> Regards,
>
> Will McGugan
> --
> blog: http://www.willmcgugan.com

sys.exit() raises a SystemExit, see
http://docs.python.org/lib/module-sys.html



From perica.zivkovic at gmail.com  Thu Jan 11 11:37:03 2007
From: perica.zivkovic at gmail.com (perica.zivkovic at gmail.com)
Date: 11 Jan 2007 08:37:03 -0800
Subject: Portable Python - free portable development environment !
Message-ID: <1168533423.224355.221390@k58g2000hse.googlegroups.com>

Hi there,

I would like to announce the *first* beta release of the Portable
Python 1.0 beta. From today Portable Python website is also online and
you can find it on the location www.PortablePython.com.

About:
Portable Python is a Python programming language preconfigured to run
directly from a portable device (USB stick, iPod etc.), enabling you to
have, at any time, portable programming environment. Just download and
extract to your portable device and in 10 minutes you are ready to
create your next Python application. No registry modifications,
installations, totally portable.

Where to find it:
http://www.portablepython.com

regards,

Perica Zivkovic

P.S. did I mentioned that it is free? :-)



From bearophileHUGS at lycos.com  Tue Jan  2 21:37:30 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Jan 2007 18:37:30 -0800
Subject: Iterate through list two items at a time
In-Reply-To: <enf2he$2sr1@cnn.xsj.xilinx.com>
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
Message-ID: <1167791850.072999.288710@48g2000cwx.googlegroups.com>

Few alternative solutions (other are possible), I usually use a variant
of the first version, inside a partition function, the second variant
is shorter when you don't have a handy partition() function and you
don't want to import modules, and the forth one needs less memory when
the data is very long:

from itertools import izip, islice

data = [1,2,3,4,5,6,7]

for x1, x2 in (data[i:i+2] for i in xrange(0, len(data)/2*2, 2)):
    print x1, x2

for x1, x2 in zip(data[::2], data[1::2]):
    print x1, x2

for x1, x2 in izip(data[::2], data[1::2]):
    print x1, x2

for x1, x2 in izip(islice(data,0,None,2), islice(data,1,None,2)):
    print x1, x2

Bye,
bearophile



From bdesth.quelquechose at free.quelquepart.fr  Sat Jan  6 17:25:09 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 06 Jan 2007 23:25:09 +0100
Subject: still struggling, howto use a list-element as a name ?
In-Reply-To: <182cf$45a00556$d443bb3a$17174@news.speedlinq.nl>
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
	<Xns98B0968123CFErzantowgmailcom@208.49.80.253>
	<182cf$45a00556$d443bb3a$17174@news.speedlinq.nl>
Message-ID: <45a01b8c$0$319$426a74cc@news.free.fr>

Stef Mientki a ?crit :
 > rzed wrote:
(snip)

>> class Power_Supply(device):
>>     def __init__(self):
>>         self.pin = {
>>             0:dict(Name='GND',Value=_DIG_OUT,something=_par2),
>>             1:dict(Name='VCC',Value=_DIG_OUT,something=_par33),
>>         }
> 
> Why so complex, I need 10 or more parameters (or empty),

or empty ???

> and then this becomes completely unreadable.

Named parameters are way much readables than a 10+ tuple. No one is 
going to remember a 10+ list of params.

  > As this is part of the "user interface",
> (I want that completely unknown with Python people,
> write these lines),


From tundra at tundraware.com  Mon Jan  8 04:12:54 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Mon, 08 Jan 2007 03:12:54 -0600
Subject: Walking The Right Path
Message-ID: <ghe974-gau2.ln1@eskimo.tundraware.com>

Ah yes, moral philosophy and python all come together... Er, that is to day:

Imagine you have this situation on a *nix filesystem:

Symlink A:  /foo -> /usr/home
Symlink B:  /bar -> /foo/username


If I do this:

   import os
   print os.path.realpath("/bar")

I get this (as one would expect):

   /usr/home/username

However, what if I want to get back the result in this form:

   /foo/username


IOW, is there a way to return a symlink-based path which contains
the symlink pointer as is was *defined* not as it expands?


TIA,
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From sebastien.thur at laposte.net  Tue Jan  9 07:52:53 2007
From: sebastien.thur at laposte.net (seb)
Date: 9 Jan 2007 04:52:53 -0800
Subject: line duplication using logging to file
In-Reply-To: <45a3850d$0$16962$4c368faf@roadrunner.com>
References: <1168329975.491514.282000@11g2000cwr.googlegroups.com>
	<45a3850d$0$16962$4c368faf@roadrunner.com>
Message-ID: <1168347173.137262.287640@v33g2000cwv.googlegroups.com>

Hi,

Thanks for the help.
Meanwhile I have written the logging function from scratch and it works
without the multiple lines.

This means that the multiple line copy is not due to the multiple
processes (or thread) trying to access the log file but to something
else.

Thanks.
Sebastien.

the new function :


import logging
import time

def write_log(level, message):
	nom_logger="main_log_file.txt"
	logging.basicConfig(level=logging.DEBUG,
                    format='%(asctime)s %(levelname)s %(message)s',
                    filename=nom_logger,
                    filemode='w')

	if str(level).lower() == "info" :
		logging.info(str(message))
	elif str(level).lower() =="error":
		logging.error(str(message))
	elif str(level).lower()=="warning" :
		logging.warning(str(message))
	elif str(level).lower() =="critical":
		logging.critical(str(message))
	elif str(level).lower() == "exception":
		logging.exception(str(message))
	else :
		logging.INFO(str(message))

	return







Paul McGuire a ?crit :
> "seb" <sebastien.thur at laposte.net> wrote in message
> news:1168329975.491514.282000 at 11g2000cwr.googlegroups.com...
> > Hi, I am writing to a file some basic information using the logging
> > module.  It is working but in the log file some line are printed
> > several time. I had put some print debugging messages in the logging
> > function (so they appear on the consile) and they are called once only.
> > Obviously there is some understantding of the logging module that I am
> > missing.
> >
> > My simple logging program (see below) is called by several processes.
> > In this way I can collect the information from various sources (and not
> > use the network enabled logging module)
> >
> > I am using python 2.4 on WinXP SP2.
> >
> > Do you have any idea ? Thanks in advance.
> >
> > Seb.
> >
>
> A quick tally of log messages by timestamp and comment gives this data:
>
> ('2007-01-08 18:26:19,578', '___init_rs232initrs232_openCOM1') : 1
> ('2007-01-08 18:26:19,578', '___run____thread lance') : 2
> ('2007-01-08 18:26:32,015', '___test1TEST 1 = OK') : 3
> ('2007-01-08 18:26:42,483', '___test1TEST 1 = OK') : 4
> ('2007-01-08 18:26:53,750', '___test1TEST 1 = OK') : 5
> ('2007-01-08 18:27:03,092', '___test1TEST 1 = OK') : 6
> ('2007-01-08 18:27:13,671', '___test1TEST 1 = OK') : 7
> ('2007-01-08 18:27:14,796', '___run___fin dans le run car continue = 0') : 8
> ('2007-01-08 18:27:14,890', "___stopthread demande d'arret") : 9
> ('2007-01-09 08:51:26,562', '___init_rs232initrs232_openCOM1') : 1
> ('2007-01-09 08:51:26,733', '___run____thread lance') : 2
> ('2007-01-09 08:51:39,453', '___test1TEST 1 = OK') : 3
> ('2007-01-09 08:51:48,280', '___test1TEST 1 = OK') : 4
> ('2007-01-09 08:51:58,750', '___test1TEST 1 = OK') : 5
> ('2007-01-09 08:52:09,812', '___test1TEST 1 = OK') : 6
> ('2007-01-09 08:52:19,078', '___test1TEST 1 = OK') : 7
> ('2007-01-09 08:52:22,078', '___run___fin dans le run car continue = 0') : 8
> ('2007-01-09 08:52:22,125', "___stopthread demande d'arret") : 8
> ('2007-01-09 08:52:22,125', "___stopthread demande d'arret ") : 1
>
> Does this suggest anything to you?
>
> -- Paul
>
>
> (BTW, here is the pyparsing program I used to do this analysis)
>
> from pyparsing import
> Word,nums,Combine,alphas,oneOf,Literal,SkipTo,restOfLine
>
> # create pyparsing grammar definition for a log line
> date = Word(nums,exact=4)+'-'+Word(nums,exact=2)+'-'+Word(nums,exact=2)
> time = Word(nums,exact=2)+':'+Word(nums,exact=2)+':'+Word(nums,exact=2)+ \
>         ','+Word(nums,exact=3)
> timestamp = Combine(date + ' ' + time)
> severity = oneOf( ["INFO","WARNING"] ) # not complete, but enough for this
> data
> backslash = Literal("\\")
> fileref = Combine(Word(alphas,exact=1)+":" + backslash + SkipTo(".py") +
> ".py")
> logline = ( timestamp.setResultsName("timestamp") + "-" +
>             severity.setResultsName("severity") + "-" +
>             fileref.setResultsName("fileref") +
>             restOfLine.setResultsName("comment") )
>
> # create list of ParseResults, with addressable log line elements by results
> name
> logEntries = [ logline.parseString(line) for line in logdata ]
>
> # tally up log lines by timestamp and comment
> tallyByTimestamp = {}
> for entry in logEntries:
>     tallyKey = (entry.timestamp, entry.comment)
>     tallyByTimestamp[tallyKey] = tallyByTimestamp.get(tallyKey,0) + 1
>
> for ts in sorted( tallyByTimestamp.items() ):
>     print "%s : %d" % ts



From bearophileHUGS at lycos.com  Sat Jan 27 06:44:26 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 27 Jan 2007 03:44:26 -0800
Subject: Fixed length lists from .split()?
In-Reply-To: <Xns98C4B9784784Eduncanbooth@127.0.0.1>
References: <2007012611072716807-bob@passcalnmtedu>
	<Xns98C4B9784784Eduncanbooth@127.0.0.1>
Message-ID: <1169898266.455515.268440@j27g2000cwj.googlegroups.com>

Duncan Booth:
> def nsplit(s, sep, n):
>     return (s.split(sep) + [""]*n)[:n]

Another version, longer:

from itertools import repeat

def nsplit(text, sep, n):
    """
    >>> nsplit("bcsn; 1000001; 1456", ";", 3)
    ['bcsn', ' 1000001', ' 1456']
    >>> nsplit("bcsn; 1000001", ";", 3)
    ['bcsn', ' 1000001', '']
    >>> nsplit("bcsn", ";", 3)
    ['bcsn', '', '']
    >>> nsplit("", ".", 4)
    ['', '', '', '']
    >>> nsplit("ab.ac.ad.ae", ".", 2)
    ['ab', 'ac', 'ad', 'ae']
    """
    result = text.split(sep)
    nparts = len(result)
    result.extend(repeat("", n-nparts))
    return result

if __name__ == "__main__":
    import doctest
    doctest.testmod()

Bye,
bearophile



From mail at microcorp.co.za  Thu Jan 11 00:39:27 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 11 Jan 2007 07:39:27 +0200
Subject: Is there a way to protect a piece of critical code?
References: <mailman.2524.1168424917.32031.python-list@python.org>
	<eo2pgf$j57$1@news.albasani.net>
Message-ID: <004901c73542$dcabaaa0$03000080@hendrik>

"robert" <no-spam at no-spam-no-spam.invalid> wrote:

> Hendrik van Rooyen wrote:
> > Hi,
> >
> > I would like to do the following as one atomic operation:
> >
> > 1) Append an item to a list
> > 2) Set a Boolean indicator
>
>
> I doubt you have to worry at all about this in such simple single-single
queue - if there is not a much more complex condition upon the insert order.
> And what should the indicator tell? that a new element is there?

Yes -that is what I was using it for, and I got bitten - It would fail after
five or so hours
of running quite happily, because the consumer section, that tested the bool,
would try to pop from an empty queue - the consumer section also cleared the
boolean when the queue length was zero...

A classic case of fuzzy thinking...

>
> The list itself tells its the length, its guaranteed to be increased _after_
.append()
> And you can .pop(0) just so - catching/retring at Key/IndexError at least.

I changed to testing the length of the queue to solve the problem,
like I said I was just curious to see if the code could be protected.

>
> List .append() and .pop() will be atomic in any Python though its not
mentioned explicitely - otherwise it would be time to leave Python.
>
> There is also Queue.Queue - though it has unneccessary overhead for most
purposes.
>
>
am aware of Queue module - the same app uses it for something else.
I dont like too many try -- excepts in the code - I find they confuse
me when I try to read it later - and in this case I cannot block on waiting for
the queue to fill.

> A function to block Python interpreter thread switching in such VHL language
would be nice for reducing the need for spreading locks in some cases (huge
code - little critical sections). Yet your example is by far not a trigger for
this. I also requested that once. Implementation in non-C-Pythons may be
difficult.
>
>
probably true - but even here - the problem would be solved by blocking
thread switching in the one thread, whereas using locks (or blocks as I would
tend to call them) requires fiddling in both threads.

> Generally there is also technique for optimistic unprotected execution of
critical sections - basically using an atomic counter and you need to provide
code for unrolling half executions. Search Google.
>
>
ok thanks will do

- Hendrik



From hg at nospam.org  Wed Jan 10 03:37:41 2007
From: hg at nospam.org (hg)
Date: Wed, 10 Jan 2007 09:37:41 +0100
Subject: Need startup suggestions for writing a MSA viewer GUI in python
References: <eo2uhr$ffn$1@news.lysator.liu.se>
Message-ID: <XK7ph.1274$qA7.944@newsfe15.lga>

Joel Hedlund wrote:

> Hi!
> 
> I've been thinking about writing a good multiple sequence alignment
> (MSA) viewer in python. Sort of like ClustalX, only with better zoom and
> pan tools. I've been using python in my work for a couple of years, but
> this is my first shot at making a GUI so I'd very much appreciate some
> ideas from you people to get me going in the right direction. Despite my
> GUI n00b-ness I need to get it good and usable with an intuitive look
> and feel.
> 
> What do you think I should do? What packages should I use?
> 
> For you non-bioinformatic guys out there, an MSA is basically a big
> matrix (~1000 cols x ~100 rows) of letters, where each row represents a
> biological sequence (gene, protein, etc...). Each sequence has an ID
> that is usually shorter than 40 characters (typically, 8-12). Usually,
> msa visualizers color the letters and their backgrouds according to
> chemical properties.
> 
> I want the look and feel to be pretty much like a modern midi sequencer
> (like cubase, nuendo, reason etc...). This means the GUI should have
> least three panes; one to the left to hold the IDs, one in the bottom to
> hold graphs and plots (e.g: user configurable tracks), and the main one
> that holds the actual MSA and occupies most of the space. The left and
> bottom panes should be resizable and foldable.
> 
> I would like to be able to zoom and pan x and y axes independently to
> view different portions of the MSA, and the left and bottom panes should
> follow the main pane. I would also like to be able to use drag'n'drop on
> IDs for reordering sequences, and possibly also on the MSA itself to
> shift sequences left and right. Furthermore, I would like to be able to
> select sequences and positions (individually, in ranges or sparsely). I
> would like to have a context sensitive menu on the right mouse button,
> possibly with submenus. Finally, I'd like to be able to export printable
> figures (eps?) of regions and whole MSAs.
> 
> I'm thinking all three panes may have to be rendered using some sort of
> scalable graphics because of the coloring and since I'd like to be able
> to zoom freely. I'll also need to draw graphs and plots for the tracks.
> Is pygame good for this, or is there a better way of doing it?
> 
> I want my viewer to behave and look like any other program, so I'm
> thinking maybe I should use some standard GUI toolkit instead, say PyQT
> or PyGTK? Would they still allow me to render the MSA nicely?
> 
> Does this seem like a humongous project?
> 
> Thanks for taking the time!
> /Joel Hedlund

I do not know if PyGtk and PyQT have demos, but wxPython does and includes
PyPlot: an easy way to look at the basic features.

hg




From bernard.chhun at gmail.com  Fri Jan 19 15:14:52 2007
From: bernard.chhun at gmail.com (Bernard)
Date: 19 Jan 2007 12:14:52 -0800
Subject: spidering script
References: <8N6dnSE2eO6QKDLYnZ2dnUVZ_uejnZ2d@fdn.com>
Message-ID: <1169237692.159550.198580@q2g2000cwa.googlegroups.com>

4 easy steps to get the links:

1. Download BeautifulSoup and import it in your script file.
2. Use urllib2 to download the html of the url.
3. mash the html using BeautifulSoup
4.
[code]
for tag in BeautifulSoupisedHTML.findAll('a'):
        print tag
[/code]

David Waizer a ?crit :
> Hello..
>
> I'm  looking for a script (perl, python, sh...)or program (such as wget)
> that will help me get a list of ALL the links on a website.
>
> For example ./magicscript.pl www.yahoo.com and outputs it to a file, it
> would be kind of like a spidering software..
> 
> Any suggestions would be appreciated.
> 
> David



From eastera at gmail.com  Wed Jan  3 01:24:01 2007
From: eastera at gmail.com (JTree)
Date: 2 Jan 2007 22:24:01 -0800
Subject: A question about unicode() function
In-Reply-To: <459ADE48.4000004@redlinepy.com>
References: <1167571210.084436.311610@48g2000cwx.googlegroups.com>
	<1167648187.190860.123680@k21g2000cwa.googlegroups.com>
	<459ADE48.4000004@redlinepy.com>
Message-ID: <1167805441.675586.163280@i12g2000cwa.googlegroups.com>

hi,
I just removed the unicode() method from my codes.
As John Machin said, I had an wrong understanding of unicode and ascii.

Paul Watson wrote:
> JTree wrote:
> > Thanks everyone!
> >
> > Sorry for my ambiguous question.
> > I changed the codes and now it works fine.
> >
> >
> >
> > JTree wrote:
> >> Hi,all
> >>      I encountered a problem when using unicode() function to fetch a
> >> webpage, I don't know why this happenned.
> >>      My codes and error messages are:
> >>
> >>
> >> Code:
> >> #!/usr/bin/python
> >> #Filename: test.py
> >> #Modified: 2006-12-31
> >>
> >> import cPickle as p
> >> import urllib
> >> import htmllib
> >> import re
> >> import sys
> >>
> >> def funUrlFetch(url):
> >>     lambda url:urllib.urlopen(url).read()
> >>
> >> objUrl = raw_input('Enter the Url:')
> >> content = funUrlFetch(objUrl)
> >> content = unicode(content,"gbk")
> >> print content
> >> content.close()
> >>
> >>
> >> error message:
> >>
> >> C:\WINDOWS\system32\cmd.exe /c python test.py
> >> Enter the Url:http://www.msn.com
> >> Traceback (most recent call last):
> >>   File "test.py", line 16, in ?
> >>     content = unicode(content,"gbk")
> >> TypeError: coercing to Unicode: need string or buffer, NoneType found
> >> shell returned 1
> >> Hit any key to close this window...
> >>
> >> Any suggestions would be appreciated!
> >>
> >> Thanks!
> 
> So...  How about posting the brief working code?



From martin at v.loewis.de  Sun Jan  7 15:33:33 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 07 Jan 2007 21:33:33 +0100
Subject: OpenBSD, Apache and Python
In-Reply-To: <1168197644.544400.72180@v33g2000cwv.googlegroups.com>
References: <1168197644.544400.72180@v33g2000cwv.googlegroups.com>
Message-ID: <45a1591d$0$304$9b622d9e@news.freenet.de>

Geoff schrieb:
> I'm now looking at using fastcgi to run my python. This looks like it's
> going to work fine, though I will be using a fcgi interface such as
> http://jonpy.sourceforge.net/. There does not seem to be any official
> fastcgi module for python.
> 
> Should I be worried about the stability and security of the python fcgi
> interfaces? Is there something better (more mature / battle tested)?

Certainly: CGI. Performance does not seem to be an issue, so CGI should
work just fine.

Regards,
Martin


From martin at v.loewis.de  Sun Jan 21 16:38:21 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 21 Jan 2007 22:38:21 +0100
Subject: mmap caching
In-Reply-To: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>
Message-ID: <45B3DD4D.3010009@v.loewis.de>

George Sakkis schrieb:
> I've been trying to track down a memory leak (which I initially
> attributed erroneously to numpy) and it turns out to be caused by a
> memory mapped file. It seems that mmap caches without limit the chunks
> it reads, as the memory usage grows to several hundreds MBs according
> to the Windows task manager before it dies with a MemoryError.

You must be misinterpreting what you are seeing. It's the operating
system that decides what part of a memory-mapped file are held in
memory, and that is certainly not without limits.

Notice that there are several values that can be called "memory
usage" (such as the size of the committed address space, the working
set size, etc); you don't mention which of these values grows several
hundreds MB.

Regards,
Martin


From kbk at shore.net  Fri Jan 26 23:24:22 2007
From: kbk at shore.net (Kurt B. Kaiser)
Date: Fri, 26 Jan 2007 23:24:22 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200701270424.l0R4OM59020656@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  421 open ( -2) /  3549 closed (+10) /  3970 total ( +8)
Bugs    :  943 open (-17) /  6471 closed (+25) /  7414 total ( +8)
RFE     :  260 open ( +2) /   250 closed ( +1) /   510 total ( +3)

New / Reopened Patches
______________________

rlcompleter tab completion in pdb  (2007-01-22)
       http://python.org/sf/1641544  opened by  Stephen Emslie

logging leaks loggers  (2007-01-22)
CLOSED http://python.org/sf/1641790  opened by  TH

Fix error/crash in AST: syntaxerror in complex ifs  (2007-01-23)
       http://python.org/sf/1642547  opened by  Thomas Wouters

comments to clarify complexobject.c  (2007-01-23)
       http://python.org/sf/1642844  opened by  Jim Jewett

Fix Bug 1362475 Text.edit_modified() doesn't work  (2007-01-24)
       http://python.org/sf/1643641  opened by  Matthias Kievernagel

ctypes leaks memory  (2007-01-24)
CLOSED http://python.org/sf/1643874  opened by  Thomas Heller

file -> open in stdlib  (2007-01-25)
       http://python.org/sf/1644218  opened by  Daniel Nogradi

Allow importing built-in submodules  (2007-01-25)
       http://python.org/sf/1644818  opened by  Miguel Lobo

Patches Closed
______________

Fix for #1601399 (urllib2 does not close sockets properly)  (2007-01-03)
       http://python.org/sf/1627441  closed by  gbrandl

C99 _Bool support for struct  (2006-12-07)
       http://python.org/sf/1610575  closed by  loewis

logging leaks loggers  (2007-01-22)
       http://python.org/sf/1641790  closed by  vsajip

Patch for #1586414 to avoid fragmentation on Windows  (2006-10-31)
       http://python.org/sf/1587674  closed by  gustaebel

smtplib email renames  (2007-01-16)
       http://python.org/sf/1637162  closed by  gbrandl

urllib2: email.Utils->email.utils  (2007-01-16)
       http://python.org/sf/1637159  closed by  gbrandl

urllib: change email.Utils -> email.utils  (2007-01-16)
       http://python.org/sf/1637157  closed by  gbrandl

tarfile extraction does not honor umask  (2006-06-16)
       http://python.org/sf/1507247  closed by  gustaebel

Fix crash when replacing sys.stdout in sitecustomize  (2007-01-08)
       http://python.org/sf/1630975  closed by  twouters

ctypes leaks memory  (2007-01-24)
       http://python.org/sf/1643874  closed by  theller

New / Reopened Bugs
___________________

2.3.6.4 Error in append and extend descriptions  (2007-01-21)
CLOSED http://python.org/sf/1641109  opened by  ilalopoulos

Python 2.5 gets curses.h warning on HPUX  (2007-01-22)
       http://python.org/sf/1642054  opened by  Roy Smith

Grammatical Error  (2007-01-23)
CLOSED http://python.org/sf/1643150  opened by  Steve Miller

function breakpoints in pdb  (2007-01-24)
       http://python.org/sf/1643369  opened by  decitre

Emphasize buffering issues when sys.stdin is used  (2007-01-24)
       http://python.org/sf/1643712  opened by  Raghuram Devarakonda

Problem with signals in a single-threaded application  (2007-01-24)
       http://python.org/sf/1643738  opened by  Ulisses Furquim

strptime %U broken  (2007-01-24)
CLOSED http://python.org/sf/1643943  opened by  Brian Nahas

Error arrow offset wrong  (2007-01-25)
CLOSED http://python.org/sf/1644239  opened by  Cees Timmerman

./configure --prefix=/ breaks, won't build C modules  (2007-01-25)
       http://python.org/sf/1644987  opened by  Jim Shankland

MIME renderer: wrong header line break with long subject?  (2007-01-26)
       http://python.org/sf/1645148  opened by  kxroberto

Bugs Closed
___________

Newline skipped in "for line in file"  (2007-01-16)
       http://python.org/sf/1636950  closed by  bcannon

Over-zealous keyword-arguments check for built-in set class  (2006-05-11)
       http://python.org/sf/1486663  closed by  gbrandl

urllib2 does not close sockets properly  (2006-11-22)
       http://python.org/sf/1601399  closed by  gbrandl

subprocess: error redirecting i/o from non-console process   (2006-11-27)
       http://python.org/sf/1603907  closed by  astrand

Problem running a subprocess  (2007-01-13)
       http://python.org/sf/1634739  closed by  astrand

subprocess.py: O(N**2) bottleneck  (2006-11-17)
       http://python.org/sf/1598181  closed by  astrand

2.3.6.4 Error in append and extend descriptions  (2007-01-21)
       http://python.org/sf/1641109  closed by  gbrandl

asyncore.py and &quot;handle_expt&quot;  (2002-12-16)
       http://python.org/sf/654766  closed by  sf-robot

Segfault provoked by generators and exceptions  (2006-10-18)
       http://python.org/sf/1579370  closed by  loewis

gen_iternext: Assertion `f->f_back != ((void *)0)' failed  (2006-05-06)
       http://python.org/sf/1483133  closed by  nnorwitz

Python polls unnecessarily every 0.1 second when interactive  (2006-09-05)
       http://python.org/sf/1552726  closed by  akuchling

subprocess interpreted double quotation wrong on windows  (2006-03-09)
       http://python.org/sf/1446119  closed by  astrand

tarfile.extract() may cause file fragmentation on Windows XP  (2006-10-28)
       http://python.org/sf/1586414  closed by  gustaebel

subprocess.py Errors with IDLE  (2005-02-17)
       http://python.org/sf/1126208  closed by  astrand

subprocess.Popen fails inside a Windows service  (2005-07-15)
       http://python.org/sf/1238747  closed by  astrand

mailbox.py uses old email names  (2007-01-16)
       http://python.org/sf/1637167  closed by  gbrandl

subprocess.py fails on Windows when there is no console  (2005-11-16)
       http://python.org/sf/1358527  closed by  astrand

mailbox.py _fromlinepattern regexp does not support positive  (2007-01-11)
       http://python.org/sf/1633678  closed by  akuchling

rfc822 module, bug in parsedate_tz  (2005-08-01)
       http://python.org/sf/1249573  closed by  gbrandl

an extra comma in condition command crashes pdb  (2007-01-03)
       http://python.org/sf/1627316  closed by  gbrandl

Use of &quot;except:&quot; in logging module  (2001-03-28)
       http://python.org/sf/411881  closed by  sf-robot

segfaults when using __del__ and weakrefs  (2005-12-10)
       http://python.org/sf/1377858  closed by  bcannon

Grammatical Error  (2007-01-24)
       http://python.org/sf/1643150  closed by  quiver

modulefinder is not documented  (2004-03-11)
       http://python.org/sf/914375  closed by  theller

strptime %U broken  (2007-01-24)
       http://python.org/sf/1643943  closed by  bcannon

Error arrow offset wrong  (2007-01-25)
       http://python.org/sf/1644239  closed by  gbrandl

ctypes: Pointer-to-pointer unchanged in callback  (2006-10-10)
       http://python.org/sf/1574588  closed by  theller

New / Reopened RFE
__________________

recursive urlparse  (2007-01-24)
       http://python.org/sf/1643370  opened by  anatoly techtonik

RFE Closed
__________

Add registry functions to windows postinstall  (2007-01-14)
       http://python.org/sf/1635335  closed by  loewis



From tew24 at spam.ac.uk  Fri Jan 19 06:19:16 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Fri, 19 Jan 2007 11:19:16 +0000
Subject: How to find out if another process is using a file
References: <mailman.2879.1169142428.32031.python-list@python.org>
Message-ID: <eoq9fl$ast$1@gemini.csx.cam.ac.uk>

Jean-Paul Calderone wrote:
> A better solution is to name or place files which are begin written in a
> which is recognizable and only rename or move them to their final location
> when they have been completely written.
> 
> For example, name files ".new" as they are being written.  When they are
> fully written, drop the ".new" suffix.  On the reader side, ignore any
> file with a name ending in ".new".

Yes, that would work very neatly but I don't have any control over the
writing process.  I think the modification time route might be the best
option, but thanks to all for their replies.

-- 
I'm at CAMbridge, not SPAMbridge


From rzantow at gmail.com  Sat Jan  6 22:56:43 2007
From: rzantow at gmail.com (rzed)
Date: Sat, 06 Jan 2007 22:56:43 -0500
Subject: still struggling, howto use a list-element as a name ?
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
	<Xns98B0968123CFErzantowgmailcom@208.49.80.253>
	<45a01c05$0$319$426a74cc@news.free.fr>
Message-ID: <Xns98B0E9689D12rzantowgmailcom@208.49.80.253>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote 
in news:45a01c05$0$319$426a74cc at news.free.fr:

> rzed a ?crit :
> (snip)
>>         for k in self.pin.keys():
>>             self.__dict__[self.pin[k]['Name']] = self.pin[k]
> 
> for pin self.pin.values():
>    self.__dict__[pin['name']] = pin
> 

D'oh! Of course! Thank you.

-- 
rzed


From py at th.on  Tue Jan 23 19:55:19 2007
From: py at th.on (py)
Date: Wed, 24 Jan 2007 00:55:19 GMT
Subject: smtplib starttls gmail example - comments?
Message-ID: <X7yth.5247$df3.5205@trnddc04>

I would love for anybody to comment on this code with regard to redundancy/efficiency/wordiness or whatever else.
for instance, do i understand correctly that i cant have a try: else: without an intervening except:?
-dave

        stdout.write("calling smtp server...")
        try:
            server = SMTP(msgsmtp)
        except:
            stdout.write("FAIL.")   #using .write to avoid the implied \n with print
        else:
            server.set_debuglevel(msgdebug)
            stdout.write("starting tls...")
            server.ehlo(msgfrom)
            try:    server.starttls()
            except: stdout.write("FAIL.")
            else:
                server.ehlo(msgfrom)           #neessary duplication (?)
                stdout.write("logging in...")
                try:    server.login(msgfrom, msgpass)
                except: stdout.write("FAIL.")
                else:
                    stdout.write("sending...")
                    try:    server.sendmail(msgfrom, msgto, msgtxt + "\n.\n")
                    except: stdout.write("FAIL.")
                    else:
                        try:
                            server.quit()
                        except sslerror:      # a known and largely ignored issue with early EOF in ssl protocol
                            stdout.write("success.")
                        else:
                            stdout.write("success.")


From erinhouston at gmail.com  Tue Jan 16 11:45:08 2007
From: erinhouston at gmail.com (ina)
Date: 16 Jan 2007 08:45:08 -0800
Subject: html + javascript automations = [mechanize + ?? ] or something
	else?
In-Reply-To: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
Message-ID: <1168965900.409623.53970@a75g2000cwd.googlegroups.com>


John wrote:
> I have to write a spyder for a webpage that uses html + javascript. I
> had it written using mechanize
> but the authors of the webpage now use a lot of javascript. Mechanize
> can no longer do the job.
> Does anyone know how I could automate my spyder to understand
> javascript? Is there a way
> to control a browser like firefox from python itself? How about IE?
> That way, we do not have
> to go thru something like mechanize?
>
> Thanks in advance for your help/comments,
> --j

You want pamie, iec or ishybrowser.  Pamie is probably the best choice
since it gets patches and updates on a regular basis.

http://pamie.sourceforge.net/



From bdesth.quelquechose at free.quelquepart.fr  Tue Jan  2 18:14:46 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 03 Jan 2007 00:14:46 +0100
Subject: list/dictionary as case statement ?
In-Reply-To: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
References: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
Message-ID: <459ae149$0$20905$426a74cc@news.free.fr>

Stef Mientki a ?crit :
> 
> If I'm not mistaken, I read somewhere that you can use 
> function-names/references in lists and/or dictionaries, 

Python's functions are objects too - instances of the (builtin) class 
'function'. So yes, you can use them like any other object (store them 
in containers, pass them as arguments, return them from functions etc).


> but now I can't 
> find it anymore.
> 
> The idea is to build a simulator for some kind of micro controller (just 
> as a general practise, I expect it too be very slow ;-).
> 
> opcodes ={
>   1: ('MOV', function1, ...),
>   2: ('ADD', function2, ),
>   3: ('MUL', class3.function3, )
>   }
> 
> def function1
>   # do something complex
> 
> 
> Is this possible ?

Why don't you just try ?

def mov(what, where):
   print "mov() called with %s : %s" % (what, where)

def add(what, towhat):
   print "add() called with %s : %s" % (what, towhat)


opcodes = {
   1: ('MOV', mov),
   2: ('ADD', add),
}

opcodes[1][1](42, 'somewhere')
opcodes[2][1](11, 38)

The third example is a bit less straightforward. Unless class3.function3 
is a classmethod or staticmethod, you'll need an instance of class3, 
either before constructing the 'opcodes' dict or when actually doing the 
call.

class SomeClass(object):
   def some_method(self):
     print "some_method called, self : %s" % self

some_obj = SomeClass()

opcodes[3] = ('MUL', some_obj.some_method)
opcodes[3][1]()

FWIW, using a dict of callables is a common Python idiom to replace the 
switch statement.

HTH


From tjgolden at gmail.com  Sat Jan 13 05:01:11 2007
From: tjgolden at gmail.com (Tim Golden)
Date: 13 Jan 2007 02:01:11 -0800
Subject: WMI Python, writing remotely and retrieving env variables values
In-Reply-To: <1168637924.982266.214250@s34g2000cwa.googlegroups.com>
References: <1168637924.982266.214250@s34g2000cwa.googlegroups.com>
Message-ID: <1168682469.492320.246700@q2g2000cwa.googlegroups.com>

Thierry Lam wrote:
> I'm using the WMI library for python and I was able to connect to
> another computer on the network with the following line:
>
> c = wmi.WMI(computer="the-network-computer", user="hello",
> password="hello")
>
> Is there a way to write information to a file on that computer?
>
> How do I read environment variables, for example SystemDrive?

Questions of this sort are really Win32 questions rather than Python
questions. That's not to say we can't help, but rather that you can
probably find an answer by going to a search engine of your choice
and typing in, say, "WMI SystemDrive". I did that, and the first hit
(from Google) was:

http://msdn2.microsoft.com/en-us/library/aa394239.aspx

which indicates that it's available from the Win32_OperatingSystem
WMI class. So, in Python:

<code>
import wmi
c = wmi.WMI () # optionally on another computer
for os in c.Win32_OperatingSystem ():
  print os # show the whole thing
  print os.SystemDrive # get only what you want

</code>

If you were after Environment Variables, then search again,
this time for "WMI Environment Variables". Third hit:

http://msdn2.microsoft.com/en-us/library/aa394143.aspx

pointing to the Win32_Environment class. And so on.

Your first question: can I write into a file? is a little
more tricky. As far as I know, there's no way even to
*create* a file with WMI, let alone write information into
it. It's not really a file-manipulation technology. You can
get hold of the name of a remote file and other of its
properties via the CIM_DataFile class, but you'd have
to translate that into an accessible UNC to be able to
access it.

TJG



From gagsl-py at yahoo.com.ar  Mon Jan 29 23:54:51 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 01:54:51 -0300
Subject: interactive prompt in IDLE
References: <op.tmw25utfh0kyz7@aidwe2058w.minlnv.agro.nl>
Message-ID: <op.tmxkv0gesd1mbx@gabriel2.softlabbsas.com.ar>

En Mon, 29 Jan 2007 10:16:32 -0300, Jan Kanis  
<jan-python-list at maka.demon.nl> escribi?:

> Hello everyone,
>
> I'm trying to change the interactive python prompt. According to the docs
> this is done by changing sys.ps1 and sys.ps2 . That works fine when
> running python interactively from a command line, but when running in  
> IDLE
> the .ps1 and .ps2 don't seem to exist.
>
> I suppose this has something to do with Idle and the python shell in it
> both running in different processes, with the prompts generated by the
> Idle process?
>
> Does anyone know if and how to change the prompts in IDLE's interactive
> python?

I'm using Python 2.5 on Windows XP.
I change ps1 and ps2 in sitecustomize.py, and both pythonwin and  
python.exe work fine.
I don't usually open IDLE, but ps1 was changed, altough it does not appear  
to use ps2 (it was replaced by "   ")

-- 
Gabriel Genellina



From tim.one at comcast.net  Sat Jan 13 21:53:59 2007
From: tim.one at comcast.net (Tim Peters)
Date: Sat, 13 Jan 2007 20:53:59 -0600
Subject: Maths error
References: <eo539l$t3b$1@gemini.csx.cam.ac.uk>
	<mailman.2632.1168583141.32031.python-list@python.org>
Message-ID: <Xns98B7DEC646Ftim111one@216.196.97.136>

[Nick Maclaren]
>> ...
>> Yes, but that wasn't their point.  It was that in (say) iterative
>> algorithms, the error builds up by a factor of the base at every
>> step. If it wasn't for the fact that errors build up, almost all
>> programs could ignore numerical analysis and still get reliable
>> answers! 
>>
>> Actually, my (limited) investigations indicated that such an error
>> build-up was extremely rare - I could achieve it only in VERY
>> artificial programs.  But I did find that the errors built up faster
>> for higher bases, so that a reasonable rule of thumb is that 28
>> digits with a decimal base was comparable to (say) 80 bits with a
>> binary base. 

[Hendrik van Rooyen]
> I would have thought that this sort of thing was a natural consequence 
> of rounding errors - if I round (or worse truncate) a binary, I can be 
> off by at most one, with an expectation of a half of a least 
> significant digit, while if I use hex digits, my expectation is around
> eight, and for decimal around five... 

Which, in all cases, is a half ULP at worst (when rounding -- as 
everyone does now).

> So it would seem natural that errors would propagate 
> faster on big base systems, AOTBE, but this may be 
> a naive view.. 

I don't know of any current support for this view.  It the bad old days, 
such things were often confused by architectures that mixed non-binary 
bases with "creative" rounding rules (like truncation indeed), and it 
could be hard to know where to "pin the blame".

What you will still see stated is variations on Kahan's telegraphic 
"binary is better than any other radix for error analysis (but not very 
much)", listed as one of two techincal advantages for binary fp in:

    http://www.cs.berkeley.edu/~wkahan/MktgMath.pdf

It's important to note that he says "error analysis", not "error 
propagation" -- regardless of base in use, rounding is good to <= 1/2 
ULP.  A fuller elementary explanation of this can be found in David 
Goldberg's widely available "What Every Computer Scientist Should Know 
About Floating-Point", in its "Relative Error and Ulps" section.  The 
short course is that rigorous forward error analysis of fp algorithms is 
usually framed in terms of relative error:  given a computed 
approximation x' to the mathematically exact result x, what's the 
largest possible absolute value of the mathematical

   r = (x'-x)/x

(the relative error of x')?  This framework gets used because it's more-
or-less tractable, starting by assuming inputs are exact (or not, in 
which case you start by bounding the inputs' relative errors), then 
successively computing relative errors for each step of the algorithm.  
Goldberg's paper, and Knuth volume 2, contain many introductory examples 
of rigorous analysis using this approach.

Analysis of relative error generally goes along independent of FP base.  
It's at the end, when you want to transform a statement about relative 
error into a statement about error as measured by ULPs (units in the 
last place), where the base comes in strongly.  As Goldberg explains, 
the larger the fp base the sloppier the relative-error-converted-to-ULPs 
bound is -- but this is by a constant factor independent of the 
algorithm being analyzed, hence Kahan's "... better ... but not very 
much".  In more words from Goldberg:

    Since epsilon [a measure of relative error] can overestimate the
    effect of rounding to the nearest floating-point number by the
    wobble factor of B [the FP base, like 2 for binary or 10 for
    decimal], error estimates of formulas will be tighter on machines
    with a small B.

    When only the order of magnitude of rounding error is of interest,
    ulps and epsilon may be used interchangeably, since they differ by
    at most a factor of B.

So that factor of B is irrelevant to most apps most of the time.  For a 
combination of an fp algorithm + set of inputs near the edge of giving 
gibberish results, of course it can be important.  Someone using 
Python's decimal implementation has an often very effective workaround 
then, short of writing a more robust fp algorithm:  just boost the 
precision.


From gagsl-py at yahoo.com.ar  Thu Jan 11 23:27:18 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 12 Jan 2007 01:27:18 -0300
Subject: How to modify object attribute by python C API
In-Reply-To: <1168551428.114028.278940@77g2000hsv.googlegroups.com>
References: <1168551428.114028.278940@77g2000hsv.googlegroups.com>
Message-ID: <7.0.1.0.0.20070112011259.059a2bf0@yahoo.com.ar>

At Thursday 11/1/2007 18:37, Huayang Xia wrote:

>I get a python object by running a class' constructor. Then I need to
>modify the instance's attribute just like obj.attr1.attr2 = 'a' if in
>python's term.
>
>     PyObject* py_obj_attr1 = PyObject_GetAttrString(obj, "attr1");
>     PyObject_SetAttrString(py_obj_attr1, "attr2",
>PyString_FromString("a"));
>     Py_DECREF(py_obj_attr1);
>
>The object py_obj_attr1 is said to be a "New reference". It's
>confusing, does it refer to the same object as "obj.attr1" in python's
>term? So that the above code equals: obj.attr1.attr2 = 'a' in python's
>term.


Read the Introduction in the "Python/C API Reference Manual". If you 
plan to use Python from C code, better learn carefully how reference 
counting works, or your progam won't work at all (or crash, in 
unrelated places, at a later time...)
Going back to the example, yes, it's like obj.attr1.attr2 = 'a'. But 
you should check that py_obj_attr1 is not NULL, and the same for 
PyString_FromString. There are examples in the doc cited and in 
"Extending and Embedding".


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From michael at mustun.ch  Sun Jan  7 17:18:56 2007
From: michael at mustun.ch (Michael M.)
Date: Sun, 07 Jan 2007 23:18:56 +0100
Subject: how to find the longst element list of lists
In-Reply-To: <45a169f0$0$309$426a34cc@news.free.fr>
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
	<45a169f0$0$309$426a34cc@news.free.fr>
Message-ID: <%keoh.230$L06.209@nntpserver.swip.net>

> 
> Err... this makes three distinct lists, not a list of lists.
> 

Sure. Logically spoken. Not in Python code. Or a number of lists.
Sure not [[ bla... ] [bla.]] etc.


From gagsl-py at yahoo.com.ar  Mon Jan 22 00:58:04 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 22 Jan 2007 02:58:04 -0300
Subject: html + javascript automations = [mechanize + ?? ] or
	somethingelse?
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com><Xns98BA77047A4C8duncanbooth@127.0.0.1>
	<1169441279.556814.16770@38g2000cwa.googlegroups.com>
Message-ID: <ep1jp5$4nk$1@sea.gmane.org>

"John" <weekender_ny at yahoo.com> escribi? en el mensaje 
news:1169441279.556814.16770 at 38g2000cwa.googlegroups.com...

> My python2.5 installation on windows did not come with "win32com".
> How do I install/get this module for windows?

Look for the pywin32 package at sourceforge.net

-- 
Gabriel Genellina 




From steve at REMOVEME.cybersource.com.au  Mon Jan 15 21:07:40 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 16 Jan 2007 13:07:40 +1100
Subject: assert versus print [was Re: The curious behavior of integer objects]
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
	<mailman.2744.1168901460.32031.python-list@python.org>
Message-ID: <pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>

On Mon, 15 Jan 2007 17:50:56 -0500, Calvin Spealman wrote:

> assert foo(0x10) == 0  # Assertions are much better tests than prints :-)

I dispute that assertion (pun intended).

Firstly, print statements work even if you pass the -O (optimize) flag
to Python. Your asserts don't.

Secondly, a bare assertion like that gives you very little information: it
just tells you that it failed:

>>> x = 1
>>> assert x == 0
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AssertionError

To provide the same information that print provides, you need something
like this:

assert x == 0, "x == %s not 0" % x

Thirdly, and most importantly, assert and print aren't alternatives,
but complementary tools. Assertions are good for automated testing and
simple data validation, where you already know what values you should
have. Printing is good for interactively exploring your data when you're
uncertain about the values you might get: sometimes it is hard to know
what you should be asserting until you've seen what results your function
returns.



-- 
Steven D'Aprano 



From python.leojay at gmail.com  Tue Jan 16 21:52:36 2007
From: python.leojay at gmail.com (Leo Jay)
Date: Wed, 17 Jan 2007 10:52:36 +0800
Subject: how to use xmlrpc properly in windows xp
Message-ID: <4e307e0f0701161852r382c20eayad652cc50d8c04a1@mail.gmail.com>

i just wrote a server and client for xmlrpc test.

if server and client run in the same machine, everything is fine.
but if server and client run in different machine, the speed is unbearably
slow.
i tried several times, and the approx time is about 18.5 sec to invoke
server.test() 5 times.
i had turned off the firewall in windows before running those tests.

but what interesting is, if i run the server in a FreeBSD machine, the speed
boosts up
to less than 1 sec to invoke server.test() 5 times. approx 20 times faster.

any suggestions? thanks in advance.

here is my source code.

############# server.py #############
from SimpleXMLRPCServer import SimpleXMLRPCServer
import SocketServer

port = 31281

a = 1

def test():
    global a
    a += 1
    print a
    return a

def main():
    # Create server
    print 'listening at port', port
    server = SimpleXMLRPCServer(("", port))
    server.register_introspection_functions()

    server.register_function(test)

    server.serve_forever()

if __name__ == '__main__':
    main()



############# client.py #############
import xmlrpclib
from datetime import datetime

server = xmlrpclib.Server("http://%s:%d" % ('192.168.0.92', 31281))
start = datetime.now()
print server.test()
print server.test()
print server.test()
print server.test()
print 'total: ', datetime.now() - start

-- 
Best Regards,
Leo Jay
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070117/ef8b9cef/attachment.html>

From toby at tobiah.org  Wed Jan 10 15:09:43 2007
From: toby at tobiah.org (Tobiah)
Date: Wed, 10 Jan 2007 12:09:43 -0800
Subject: Read CSV file into an array
In-Reply-To: <1168396138.395017.299530@o58g2000hsb.googlegroups.com>
References: <1168396138.395017.299530@o58g2000hsb.googlegroups.com>
Message-ID: <45a53b54$0$4819$88260bb3@free.teranews.com>

oyekomova wrote:
> I would like to know how to read a CSV file with a header ( n columns
> of float data) into an array without the header row.
> 
import csv

l = []
for line in csv.reader(open("my.csv").readlines()[1:]):
         l.append(line)

Which really gets you a list of lists.

-- 
Posted via a free Usenet account from http://www.teranews.com



From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 19 22:35:55 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 20 Jan 2007 14:35:55 +1100
Subject: **argv can't work
References: <mailman.2928.1169263231.32031.python-list@python.org>
Message-ID: <pan.2007.01.20.03.35.54.650735@REMOVE.THIS.cybersource.com.au>

On Sat, 20 Jan 2007 11:20:29 +0800, Jm lists wrote:

> hello members,
> 
> See my script piece below:
> 
> def testB(shift,**argv):
>     print "first argument is %s" %shift
>     print "all other arguments are:",argv
> 
> testB('mails','Jen','Jen at att.com','Joe','Joe at aol.com')
> 
> It can't work at all.please help tell me the reasons.thanks.

Its because of an evil terrorist plot. I suggest you invade Belgium, that
should fix it.

Or, you could explain what you are trying to do. Posting the exception you
get will also help.

Hint: **args accumulates KEYWORD arguments. Do you have any keyword
arguments in your argument list? How many NON-KEYWORD arguments do you
have? How many does your function accept?

Here's another hint:

some_function("this is a non-keyword argument", \
              key="this is a keyword argument")



-- 
Steven.



From klaus at seistrup.dk  Sun Jan 28 06:37:39 2007
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Sun, 28 Jan 2007 11:37:39 +0000 (UTC)
Subject: IP address
References: <mailman.3244.1169978684.32031.python-list@python.org>
	<ephtph$fcl$1@minji.szn.dk>
	<mailman.3245.1169983158.32031.python-list@python.org>
Message-ID: <epi1u3$nsv$1@minji.szn.dk>

Scripter47 wrote:

>> python -c 'import re, urllib; print re.findall("<title>Your IP: (.+?)</title>", urllib.urlopen("http://myip.dk/").read())[0]'
> 
> Hmm then you need Internet connecting.

That's what IP adresses are for...

> can i do it without that?

Perhaps you could use the method mentioned in
  http://mail.python.org/pipermail/python-list/1999-August/009153.html

> and it doesn't work either :(

Works for me:

#v+

klaus at home:~ $ python -c 'import re, urllib; print re.findall("<title>Your IP: (.+?)</title>", urllib.urlopen("http://myip.dk/").read())[0]'
217.157.1.202
klaus at home:~ $

#v-

Cheers,

-- 
Klaus Alexander Seistrup
http://klaus.seistrup.dk/



From krypto.wizard at gmail.com  Wed Jan 31 22:13:14 2007
From: krypto.wizard at gmail.com (krypto.wizard at gmail.com)
Date: 31 Jan 2007 19:13:14 -0800
Subject: division by 7 efficiently ???
In-Reply-To: <mailman.3385.1170298932.32031.python-list@python.org>
References: <1170297774.859006.29490@a75g2000cwd.googlegroups.com>
	<mailman.3385.1170298932.32031.python-list@python.org>
Message-ID: <1170299594.491478.310430@a34g2000cwb.googlegroups.com>

Its not an homework. I appeared for EA sports interview last month. I
was asked this question and I got it wrong. I have already fidlled
around with the answer but I don't know the correct reasoning behind
it.

Thanks,


On Jan 31, 10:01 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> krypto.wiz... at gmail.com writes:
> > How to divide a number by 7 efficiently without using - or /
> > operator.  We can use the bit operators. I was thinking about bit
> > shift operator but I don't know the correct answer.
>
> I think you are asking for help on a homework assignment in violation
> of collusion and plagiarism rules of your educational institution, and
> I claim my ten zorkmids.
>
> Please use the resources made available to you in your course of
> study; this almost certainly does not include having people on
> discussion forums answer the homework for you.
>
> --
>  \       "I like to go to art museums and name the untitled paintings. |
>   `\             'Boy With Pail'. 'Kitten On Fire'."  -- Steven Wright |
> _o__)                                                                  |
> Ben Finney




From James.w.Howard at gmail.com  Fri Jan 19 18:48:12 2007
From: James.w.Howard at gmail.com (JamesHoward)
Date: 19 Jan 2007 15:48:12 -0800
Subject: Asyncore select statement problem
In-Reply-To: <mailman.2915.1169236242.32031.python-list@python.org>
References: <1169075120.491855.103200@q2g2000cwa.googlegroups.com>
	<mailman.2871.1169133210.32031.python-list@python.org>
	<1169228524.810461.51160@a75g2000cwd.googlegroups.com>
	<mailman.2915.1169236242.32031.python-list@python.org>
Message-ID: <1169250492.375778.296580@11g2000cwr.googlegroups.com>

Again, thank you for your help.  With digging through the Asyncore.py
source, I was able to find the poll2 function which is called when the
function asyncore.loop(use_poll = True) is enabled.

This function does not use a select call, but a poll call to do its
looping.  It works well for the problem of threads closing devices at
unknown times.  The reason for this is that the select statement is
called on a series of file descriptors that should not be changed.  If
the file descriptors become invalid, select throws and exception and
the asyncore loop haults.  The use_poll flag sets the asyncore module
to use a poll instead of a select statement.

Within the poll method, there are better ways of dealing with file
descriptors and they seem to be able to discern if a file descriptor
becomes disconnected with the POLLHUP flag.

I am still unsure as to why the select function is used instead of the
poll function, but using poll appears to have solved my problem.

Thanks for all the help,
Jim Howard



From beliavsky at aol.com  Sun Jan 21 20:36:49 2007
From: beliavsky at aol.com (Beliavsky)
Date: 21 Jan 2007 17:36:49 -0800
Subject: Reading Fortran Data
In-Reply-To: <1169424273.929396.133880@m58g2000cwm.googlegroups.com>
References: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
	<1169424273.929396.133880@m58g2000cwm.googlegroups.com>
Message-ID: <1169429808.910298.10240@11g2000cwr.googlegroups.com>


Carl Banks wrote:

<snip>

> >   WRITE(90,*) nfault,npoint
>
> Fortran writes this as two arbitrary integers separated by a space.

I wrote a paragraph in my reply explaining why this is wrong. A Fortran
list-directed write can print results in an almost arbitrary format,
depending on the compiler. Many compilers will separate integers by
several spaces, not just one, and they could use commas instead of
spaces if they wanted. The number of items printed before a new line is
started is also compiler-dependent. For more control, one uses a
formatted write, for example

write (90,"(2(1x,i0))") nfault,npoint

<snip>



From bthom at cs.hmc.edu  Tue Jan  9 00:47:21 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Mon, 08 Jan 2007 21:47:21 -0800
Subject: private variables
Message-ID: <74E534EE-D260-409D-8E91-0182BB897B94@cs.hmc.edu>

Hello,

In what version of python were private variables added?

Thanks,

--b



From cvanarsdall at mvista.com  Wed Jan 24 13:43:11 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 24 Jan 2007 10:43:11 -0800
Subject: The reliability of python threads
In-Reply-To: <4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
References: <mailman.3092.1169657938.32031.python-list@python.org>	<ep841j$anu$1@gemini.csx.cam.ac.uk>	<mailman.3095.1169659417.32031.python-list@python.org>	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
Message-ID: <45B7A8BF.1090106@mvista.com>

Chris Mellon wrote:
> On 24 Jan 2007 18:21:38 GMT, Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
>   
>> [snip]
>>
>>     
>
> I'm aware of the issues with the POSIX threading model. I still stand
> by my statement - bringing up the problems with the provability of
> correctness in the POSIX model amounts to FUD in a discussion of
> actual problems with actual code.
>
> Logic and programming errors in user code are far more likely to be
> the cause of random errors in a threaded program than theoretical
> (I've never come across a case in practice) issues with the POSIX
> standard.
>   
Yea, typically I would think that.  The problem I am seeing is 
incredibly intermittent.  Like a simple pyro server that gives me a 
problem maybe every three or four months.  Just something funky will 
happen to the state of the whole thing, some bad data, i'm having an 
issue tracking it down and some more experienced programmers mentioned 
that its most likely a race condition.  THe thing is, I'm really not 
doing anything too crazy, so i'm having difficult tracking it down.  I 
had heard in the past that there may be issues with threads, so I 
thought to investigate this side of things. 

It still proves difficult, but reassurance of the threading model helps 
me focus my efforts.

> Emphasizing this means that people will tend to ignore bugs as being
> "the fault of POSIX" rather than either auditing their code more
> carefully, or avoiding threads entirely (the second being what I
> suspect your goal is).
>
> As a last case, I should point out that while the POSIX memory model
> can't be proven safe, concrete implementations do not necessarily
> suffer from this problem.
>   
Would you consider the Linux implementation of threads to be concrete?

-carl

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From "trades\" at (none)  Sun Jan 14 14:32:28 2007
From: "trades\" at (none) (none)
Date: Sun, 14 Jan 2007 13:32:28 -0600
Subject: help with recursion on GP project
Message-ID: <45aa8784$0$5803$4c368faf@roadrunner.com>

I'm trying to create a recursive function to evaluate the expressions 
within a list.  The function uses eval() to evaluate the list.  Like a 
lisp interpreter but very limited.
What I'm looking for is a function to recursively traverse the list and 
provide answers in place of lists, so that ...
Example = ['add', ['sub', 5, 4], ['mul', 3, 2]]
Becomes:    Example = ['add', 1, 6]
Becomes:    Example = 7
*Functions are defined in the script

The code I currently have, which isn't pretty (bottom), doesn't work 
because it doesn't return the value of the evaluated list.  But I can't 
figure out how to do that.  Any help would be greatly appreciated.

Jack Trades


def recursive(tree):
   if type(tree[1]) != type([]) and type(tree[2]) != type([]):
     eval(a[0]+'('+str(tree[1])+','+str(tree[2])+')')
   if type(tree[2]) == type([]):
     recursive(tree[2])
   if type(tree[1]) == type([]):
     recursive(tree[1])


From piet at cs.uu.nl  Sat Jan  6 10:37:53 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Sat, 06 Jan 2007 16:37:53 +0100
Subject: How do I add users using Python scripts on a Linux machine
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
	<ene0j1$6nk$03$1@news.t-online.com>
	<m2fyatcddg.fsf@ordesa.cs.uu.nl>
	<eng5qv$6l4$00$1@news.t-online.com>
	<m2hcv651ta.fsf@ordesa.cs.uu.nl> <enks9m$nsh$1@lust.ihug.co.nz>
Message-ID: <m2bqlctbce.fsf@ordesa.lan>

>>>>> Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> (LD) wrote:

>LD> No it wouldn't. This security hole was fixed years ago.

How?
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From gandalf at designaproduct.biz  Mon Jan  8 04:36:29 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Mon, 08 Jan 2007 10:36:29 +0100
Subject: Parallel Python
In-Reply-To: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
Message-ID: <45A2109D.5050501@designaproduct.biz>

parallelpython at gmail.com wrote:
> Has anybody tried to run parallel python applications?
> It appears that if your application is computation-bound using 'thread'
> or 'threading' modules will not get you any speedup. That is because
> python interpreter uses GIL(Global Interpreter Lock) for internal
> bookkeeping. The later allows only one python byte-code instruction to
> be executed at a time even if you have a multiprocessor computer.
> To overcome this limitation, I've created ppsmp module:
> http://www.parallelpython.com
> It provides an easy way to run parallel python applications on smp
> computers.
> I would appreciate any comments/suggestions regarding it.
>   
I always thought that if you use multiple processes (e.g. os.fork) then 
Python can take advantage of multiple processors. I think the GIL locks 
one processor only. The problem is that one interpreted can be run on 
one processor only. Am I not right? Is your ppm module runs the same 
interpreter on multiple processors? That would be very interesting, and 
something new.


Or does it start multiple interpreters? Another way to do this is to 
start multiple processes and let them communicate through IPC or a local 
network.


  Laszlo



From rvernica at gmail.com  Fri Jan 26 14:54:53 2007
From: rvernica at gmail.com (Rares Vernica)
Date: Fri, 26 Jan 2007 11:54:53 -0800
Subject: Unicode error handler
Message-ID: <epdmae$qps$1@sea.gmane.org>

Hi,

Does anyone know of any Unicode encode/decode error handler that does a 
better replace job than the default replace error handler?

For example I have an iso-8859-1 string that has an 'e' with an accent 
(you know, the French 'e's). When I use s.encode('ascii', 'replace') the 
'e' will be replaced with '?'. I would prefer to be replaced with an 'e' 
even if I know it is not 100% correct.

If only this letter would be the problem I would do it manually, but 
there is an entire set of letters that need to be replaced with their 
closest ascii letter.

Is there an encode/decode error handler that can replace all the 
not-ascii letters from iso-8859-1 with their closest ascii letter?

Thanks a lot,
Ray



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan  8 17:23:40 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 08 Jan 2007 23:23:40 +0100
Subject: Execute binary code
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<EOSdneXxmrS6OT_YnZ2dnUVZ_q7inZ2d@comcast.com>
Message-ID: <50fujcF1g1nplU2@mid.individual.net>

Larry Bates wrote:

> What you are asking is a virus/trojan "like" program. 

Why? For being a trojan horse it must fake something. For being a
virus it must replicate itself. Writing an executable doesn't imply
the will to replicate itself.

But you could technically achieve this with standard python too
(just write python source and spawn a python process executing it).

Regards,


Bj?rn

-- 
BOFH excuse #28:

CPU radiator broken



From vsalesa at gmail.com  Wed Jan 10 05:40:45 2007
From: vsalesa at gmail.com (odlfox)
Date: 10 Jan 2007 02:40:45 -0800
Subject: add re module to a embeded device phyton interpreter
Message-ID: <1168425645.340291.42720@p59g2000hsd.googlegroups.com>

   I hav to add the re (regular expressions) functionality to an
Embeded device that I'm using.  I read the re.py file and it says I
need several dependencies, one of them is the pcre module but I found
no pcre.py or pcre.pyc file.  Someone knows where to find something to
solve my problem. Thanks a lot



From hg at nospam.org  Mon Jan 15 05:23:16 2007
From: hg at nospam.org (hg)
Date: Mon, 15 Jan 2007 11:23:16 +0100
Subject: catching signals in an object
Message-ID: <7MOqh.18678$sE7.16830@newsfe21.lga>

Hi,

I need to catch a signal "SIGUSR1" in an object ... and I need the signal
def that traps is to access the object context ... is that possible  ?
(*nix and windows)

ex:

class test:
        def __init__(self):
                self.Set_Signal()

        def Set_Signal(self):
                import signal
                signal.signal(..., Func)
                def Func(.....):
                        #I need to get access to self


or can signal.signal take a method as param ?

Thanks

hg



From mail at microcorp.co.za  Fri Jan 12 00:16:25 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 12 Jan 2007 07:16:25 +0200
Subject: maximum number of threads
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl><eo2rl6$41s$1@upsn250.cri.u-psud.fr><c2701f5c0701100611u69732112v8b5e4782d0944ba@mail.gmail.com>
	<200701100743.45547.kosh@aesaeion.com>
Message-ID: <007201c73608$cf18dd60$03000080@hendrik>

 "William Heymann" <kosh at aesaeion.com> wrote:


> So you know I tried this on ubuntu edgy 64bit edition on a dual 2218 opteron 
> system with 8G of ram and I got
> 
> <lots of output>
> Exception raised: can't start new thread
> Biggest number of threads: 32274
> 

This almost looks as if the number of threads is a sixteen bit signed int... 

- Hendrik



From emin.shopper at gmail.com  Fri Jan  5 09:01:56 2007
From: emin.shopper at gmail.com (Emin)
Date: 5 Jan 2007 06:01:56 -0800
Subject: bug in copy.deepcopy or in getattr or in my understanding?
In-Reply-To: <mailman.2301.1167966549.32031.python-list@python.org>
References: <1167942359.246311.80700@s34g2000cwa.googlegroups.com>
	<mailman.2301.1167966549.32031.python-list@python.org>
Message-ID: <1168005716.195293.121490@38g2000cwa.googlegroups.com>

Dear Gabriel,

Thank you for your reply. As you guessed, I want to be able to select
the method at runtime as in your final example, but when I tried your
suggestion I got the same error (see below). I think the problem is
that getattr is donig something different than in my example where I
explicitly get it from the dict (see the very end of the transcript
below):


--------------------------- Transcript Follows
----------------------------------------------------------

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> # The following shows that using getattr to grab a method is
>>> # incompatible with copy.deepcopy
>>> class a:
... 	def foo(self): pass
...
>>> class b(a):
... 	def __init__(self):
... 		self.x = getattr(a,'foo')
...
>>> import copy
>>> c=b()
>>> copy.deepcopy(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "c:\Python25\lib\copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "c:\Python25\lib\copy.py", line 291, in _deepcopy_inst
    state = deepcopy(state, memo)
  File "c:\Python25\lib\copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "c:\Python25\lib\copy.py", line 254, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "c:\Python25\lib\copy.py", line 189, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "c:\Python25\lib\copy.py", line 322, in _reconstruct
    y = callable(*args)
  File "c:\Python25\lib\copy_reg.py", line 92, in __newobj__
    return cls.__new__(cls, *args)
TypeError: instancemethod expected at least 2 arguments, got 0
>>>
>>> # The following shows that getattr is doing something different
>>> # than looking in the __dict__ of base classes
>>> b.__bases__[0].__dict__['foo']
<function foo at 0x009F0CF0>
>>> getattr(a,'foo')
<unbound method a.foo>
>>>


On Jan 4, 10:08 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Thursday 4/1/2007 17:26, Emin wrote:
>
> >I got some unexpected behavior in getattr and copy.deepcopy (see
> >transcript below). I'm not sure if this is actually a bug in
> >copy.deepcopy or if I'm doing something too magical with getattr.
> >Comments would be appreciated.Both examples are different. #1 stores a *bound* method into an
> instance attribute. Bound methods carry a reference to "self", this
> creates a cyclic reference that may cause problems to the garbage
> collector (and confuses deepcopy, apparently).
> #2 uses and *unbound* method and it's the usual way.
>
> > >>> class a:
> >...     def foo(self):
> >...             print 'hi'
> >...
> > >>> class b(a): #1
> >...     def __init__(self):
> >...             self.y = getattr(self,'foo')
>
> > >>> class b(a): #2
> >...     def __init__(self):
> >...             self.x = self.__class__.__bases__[0].__dict__['foo']For #2 you can simply say:
>
> class b(a):
>      x = a.foo
>
> If you have to choose at runtime (a simplified version of your own code):
>
> class b(a):
>      def __init__(self):
>          name = select_method_to_use(..., default="foo")
>          self.x = getattr(a, name)
>
> You *know* your bases because you wrote them in the class statement
> (or use super() instead of playing with __bases__); and getattr works
> fine here so you don't need to mess with the __dict__ details.
>
> (Note that #1 was *almost* right, you had to replace self by the base class)
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya!http://www.yahoo.com.ar/respuestas



From simon at brunningonline.net  Fri Jan 12 14:34:36 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 12 Jan 2007 19:34:36 +0000
Subject: Rational Numbers
In-Reply-To: <eo8b1r$r9c$1@gemini.csx.cam.ac.uk>
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<mailman.2597.1168550439.32031.python-list@python.org>
	<eo6ia5$5bt$1@gemini.csx.cam.ac.uk>
	<mailman.2643.1168611301.32031.python-list@python.org>
	<eo883j$l9d$1@gemini.csx.cam.ac.uk>
	<mailman.2648.1168616202.32031.python-list@python.org>
	<eo8b1r$r9c$1@gemini.csx.cam.ac.uk>
Message-ID: <8c7f10c60701121134q35bf7c27h7c4b5cf1dcfe44ca@mail.gmail.com>

On 12 Jan 2007 15:55:39 GMT, Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
>
> In article <mailman.2648.1168616202.32031.python-list at python.org>,
> Carsten Haese <carsten at uniqsys.com> writes:
> |> but there are more use
> |> cases for Decimal than for Rational.
>
> That is dubious, but let's not start that one again.

Decimals are good for holding financial values. There's a whole lot of
software out there that deals with money.

-- 
Cheers,
Simon B
simon at brunningonline.net


From GatlingGun at gmail.com  Wed Jan 31 10:32:27 2007
From: GatlingGun at gmail.com (TOXiC)
Date: 31 Jan 2007 07:32:27 -0800
Subject: Regex with ASCII and non-ASCII chars
In-Reply-To: <epq6k8$po8$01$1@news.t-online.com>
References: <1170243969.504255.134100@v33g2000cwv.googlegroups.com>
	<epq6k8$po8$01$1@news.t-online.com>
Message-ID: <1170257547.041535.20770@a75g2000cwd.googlegroups.com>

Thx it work perfectly.
If I want to query a file stream?

    file = open(fileName, "r")
    text = file.read()
    file.close()

    regex = re.compile(u"(???????)", re.IGNORECASE)
    match = regex.search(text)
    if (match):
        result = match.group()
        print result
        WritePatch(fileName,text,result)
    else:
        result = "No match found"
        print result

It return "no match found" (the file contain the string "???????"
but...).
Thanks in advance for the help!



From no-spam at no-spam-no-spam.invalid  Sun Jan  7 07:41:35 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sun, 07 Jan 2007 13:41:35 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
Message-ID: <enqpq1$kc5$1@news.albasani.net>

time.swift at gmail.com wrote:
> Coming from a C++ / C# background, the lack of emphasis on private data
> seems weird to me. I've often found wrapping private data useful to
> prevent bugs and enforce error checking..

What is the use of private declarations, if the names themselves are not verbose about it?

=> You'll always search the class definition/doc to check if the member is below "private" or you wait for compiler errors. If you still want to override, you have to declare 'friends' and all that school boy stuff.

=> Its not useful and efficient for programmers but probably more fulfilled teachers lust itching disciples, when those languages where invented.

Moreover, in those languages there is more or less a clash of namespaces: All globals, module globals, members, local variables and possibly 'with'-variables. This confusion mixed with private declarations will soon provide a situation where one looses overview, what variable exactly was meant.

The syntax in Python with _'s and 'self.' and true modularization and minimal magic namespace behavior, but with explicit self-similiar access to objects, modules, functions and everything is overall most clear und effective. After all I don't know another language which behaves so well in this regard. 

Even Ruby (little positive: it has not even the 'global' variable declaration) is much more ill below the line in that modules,classes, methods/functions.. are not objects but namespaces, messages etc. - thus self-similarity is so broken, that this which will actually limit the power and scalability of this language.


Robert


> It appears to me (perhaps wrongly) that Python prefers to leave class
> data public.  What is the logic behind that choice?
> 
> Thanks any insight.


From fredrik at pythonware.com  Wed Jan  3 10:20:03 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 3 Jan 2007 16:20:03 +0100
Subject: Unsubscribing from the list
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com><ene064$bm5$1@sea.gmane.org>
	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>
Message-ID: <enghj3$qhf$1@sea.gmane.org>

Dotan Cohen wrote:

> > Go to the bottom of the page. Next to the button "Unsubscribe or edit options",
> > enter your email address. Click the button. On the next page, click
> > "Unsubscribe". Follow the instructions in the email that is sent to you.

> Thanks. I read that page, got as far as this:
>
> (The subscribers list is only available to the list administrator.)
>
> and decided that there was no futher interest on the page for me.

if you're unable to follow written instructions, how on earth did you manage
to subscribe to this list ?

</F> 





From hg at nospam.org  Tue Jan 16 09:22:37 2007
From: hg at nospam.org (hg)
Date: Tue, 16 Jan 2007 15:22:37 +0100
Subject: Queue and signals
Message-ID: <tmbrh.1492$lc5.386@newsfe20.lga>

Hi,

Is it legal to use Queue.put in a signal handle and Queue.get in the main
process (no thread)

Thanks,

hg



From bdesth.quelquechose at free.quelquepart.fr  Tue Jan  2 10:32:12 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 02 Jan 2007 16:32:12 +0100
Subject: OO question
In-Reply-To: <1167700159.792649.61210@a3g2000cwd.googlegroups.com>
References: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
	<1167639280.181587.242490@s34g2000cwa.googlegroups.com>
	<1167700159.792649.61210@a3g2000cwd.googlegroups.com>
Message-ID: <459a74e2$0$315$426a74cc@news.free.fr>

fejkadress at hushmail.com a ?crit :
> First I want to say thanks everyone for helping me!
> 
> John Machin wrote:
> 
> 
>>fejkadress at hushmail.com wrote:
>>
>>>I want to make an addressbook and I'm new to OO programming, so I
>>>wonder if this sounds reasonable.
>>>
>>>I think of making a class Address which contains all data about one
>>>person, that class can have UserDict as baseclass so I can access data
>>>like object['name'], etc..
>>
>>Stop right there. Class Address contains all data about one *person*?
>>Please consider renaming that class Person, and having a separate class
>>Address.
>>
>>Interruption for a reality check:  A person may be related to zero, one
>>or many addresses. An address may be related to zero, one or many
>>persons. The relationship may take many forms e.g. "lives at", "once
>>lived at", "has been noticed loitering outside", ...
> 
> 
> Lets say I have those two classes, Person and Address. How would one
> implement the relationship between them? First, a Person can have one
> or more addresses (or none), that could be represented as a list of
> Addresses, right? But then, if I have an Address I want to see which
> persons who live there, then I would have a list of Persons in each
> Address.
> 
> Is this doubly-linked way of doing it a good way of doing it,  or is
> there a better "OO way" I haven't learned yet?
> 

The most common solution so far for this kind of problems is to forget 
about "domain model" OO modeling and switch to relational modeling 
(usually using an SQL dbms). Else you end up rewriting an half-backed 
buggy ad-hoc relational system... FWIW, using OO does not imply using an 
OO domain model. You can restrict OO features to "technical" objects...

Now the good news is that there are Python packages like SQLAlchemy that 
gives you kind of "best of both world" solutions (OO domain model + 
relational support).

My 2 cents...


From vithi99 at hotmail.com  Mon Jan 15 00:11:35 2007
From: vithi99 at hotmail.com (vithi)
Date: 14 Jan 2007 21:11:35 -0800
Subject: How to write code to get focuse the application which is open
	from server
In-Reply-To: <45a0dae2$0$8948$4c368faf@roadrunner.com>
References: <1168143871.536432.252010@v33g2000cwv.googlegroups.com>
	<45a0dae2$0$8948$4c368faf@roadrunner.com>
Message-ID: <1168837895.073936.270330@11g2000cwr.googlegroups.com>

Hi Paul,
Since your reply I try to use pywinauto. I was able to get the control
of a window that is a good news but it is not working for sub window
this main window create.(popup windows)
eg) File -> print    will open print window but the code is not
clicking print button. I try several combination
app,Print.OK.CloseClick() or app,Print.OK.Click() is not working

my code goes like that
app=application.Application()
qi = app.window_(title_re = ".*arcMap.*")
qi.TypeKeys("%FP")
app,Print.OK.Click()

the last line of code is not working same thing with file open to
qi.TypeKeys("%FO") create popup window "open" but
app,Open.Filename.SetEditText("test1,txt") is not working any help to
overcome to this problem (Here the "Print" , "Open" are windows title I
am using without any undestanding why I am using. Any help?





Paul McGuire wrote:
> "vinthan" <svithi at gmail.com> wrote in message
> news:1168143871.536432.252010 at v33g2000cwv.googlegroups.com...
> > hi,
> > I am new to python. I have to write test cases in python. An
> > application is open in the desk top ( application writen in .Net) I
> > have to write code to get focuse the application and click on the link
> > which in the one side  and it will load the map on the other and I have
> > to check map is loaded. Any one tell me how do I use Dispatch or any
> > other method to write a code.
> >
> If you are running on Windows, look into pywinauto
> (http://www.openqa.org/pywinauto/).
>
> I have successfully used it to interact with a Flash animation running
> within an IE browser.
>
> I also had to inspect the graphics displayed by the Flash animation, for
> this I used PIL (http://www.pythonware.com/products/pil/).
> 
> Good luck,
> -- Paul



From felipe.lessa at gmail.com  Thu Jan  4 10:40:21 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Thu, 4 Jan 2007 13:40:21 -0200
Subject: Packaging up a Python/Twisted Matrix application...
In-Reply-To: <k09nh.8951$0F1.6975@trnddc02>
References: <k09nh.8951$0F1.6975@trnddc02>
Message-ID: <c2701f5c0701040740n76c869fdn506fc3cb641cb19f@mail.gmail.com>

On 1/4/07, Chaz Ginger <cginboston at hotmail.com> wrote:
> I have a rather large Python/Twisted Matrix application that will be run
> on Windows, Linux and perhaps Macs. I was wondering if there are any
> tools that can be used to create an installer that will bring in Python,
> Twisted Matrix, my application libraries and anything else I need?

I haven't tried with Twisted, but I had success in using py2exe + Inno
Setup on a program dependent on Python + ReportLab + pygtk. As both
ReportLab and pygtk got even C extensions, I don't see why this setup
wouldn't work with Twisted.

-- 
Felipe.


From frank at chagford.com  Mon Jan  8 03:11:15 2007
From: frank at chagford.com (Frank Millman)
Date: 8 Jan 2007 00:11:15 -0800
Subject: Recommendations (or best practices) to define functions (or
	methods)
In-Reply-To: <45A1F1D9.8070206@v.loewis.de>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
	<45A1F1D9.8070206@v.loewis.de>
Message-ID: <1168243875.143604.269720@q40g2000cwq.googlegroups.com>


Martin v. L?wis wrote:
> vizcayno schrieb:
> > Need your help in the "correct" definition of the next function. If
> > necessary, I would like to know about a web site or documentation that
> > tells me about best practices in defining functions, especially for
> > those that consider the error exceptions management.
>
> I agree with George Sakkis' remarks. The best way to define this function is
>
> def ExecuteSQL(cmdSQL, cursor):
>   return cursor.execute(cmdSQL)
>
> If this raises an exception, it likely means there is something
> wrong with the SQL statement. The program should abort, and the
> developer should correct it.
>
> Regards,
> Martin

With respect, I can offer a counter-argument.

I have a multi-user server program, with a connection to a database,
servicing multiple requests from connected clients.

The clients are 'thin' - the business logic resides on the server - so
when a client selects an option, the server imports the appropriate
module and executes it. If that includes a SQL command, the server
connects to the database, executes the command, and returns the result
to the client.

If there is something wrong with the SQL statement, I do not want to
crash the server, I want to notify the client that there was something
wrong, so that the offending module can be corrected and reloaded.

Frank Millman



From steve at holdenweb.com  Thu Jan 11 16:29:05 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 11 Jan 2007 21:29:05 +0000
Subject: Portable Python - free portable development environment !
In-Reply-To: <1168533423.224355.221390@k58g2000hse.googlegroups.com>
References: <1168533423.224355.221390@k58g2000hse.googlegroups.com>
Message-ID: <eo6a71$qqk$2@sea.gmane.org>

perica.zivkovic at gmail.com wrote:
> Hi there,
> 
> I would like to announce the *first* beta release of the Portable
> Python 1.0 beta. From today Portable Python website is also online and
> you can find it on the location www.PortablePython.com.
> 
> About:
> Portable Python is a Python programming language preconfigured to run
> directly from a portable device (USB stick, iPod etc.), enabling you to
> have, at any time, portable programming environment. Just download and
> extract to your portable device and in 10 minutes you are ready to
> create your next Python application. No registry modifications,
> installations, totally portable.
> 
> Where to find it:
> http://www.portablepython.com
> 
> regards,
> 
> Perica Zivkovic
> 
> P.S. did I mentioned that it is free? :-)
> 
And what, besides is freeness, differentiates it from Movable Python?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From mail at microcorp.co.za  Fri Jan 19 09:09:41 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 19 Jan 2007 16:09:41 +0200
Subject: How can I create a linked list in Python?
References: <eoj6rr$90bt$1@netnews.upenn.edu><mailman.2791.1168975031.32031.python-list@python.org><1168983652.192715.235580@a75g2000cwd.googlegroups.com><pan.2007.01.17.09.11.39.502517@gmx.net>
	<slrnequo3m.tcj.grahn+nntp@frailea.sa.invalid>
Message-ID: <010201c73bd4$75ac9a60$03000080@hendrik>

"Jorgen Grahn" <grahn+nntp at snipabacken.dyndns.org> wrote:

> 
> FWIW, I oppose the idea (paraphrased from further up the thread) that linked
> lists and other data structures are obsolete and dying concepts, obsoleted
> by Python and other modern languages.
> 
> 99% of the time. a Python list is the right tool for the job, but that's
> only because we have CPU cycles to spare and the 'n' in our 'O(n)' is
> limited. You cannot call yourself a computer scientist without understanding
> things like linked lists.  No other data structure has the same
> characteristics (good and bad) as that one. Or those two, really.

+1

The concept of storing a pointer that points to the "next thing" is so basic
that it will never go away.  One meets it all time in chained buffer blocks, 
in tag sorts, etc...

And if you add a pointer to the "previous thing" too, then adding or taking
something out of what could become a ring is a constant effort.  Until you
run out of memory.

Ye Olde Universal Controlle Blocke:

- pointer to the start of data block
- length of allocated data block
- pointer to next control block
- pointer to previous control block
- next in pointer into data block
- next out pointer into data block
- optional length of data
- optional here starts or ends the lesson indicator

errrm... thats about it, unless you want a fast index too:

- pointer to first control block
- pointer to second control block
- pointer to third control block
...

Isn't it nice of python to hide all this stuff?

- Hendrik




From tpawley at gmail.com  Sat Jan 13 06:17:15 2007
From: tpawley at gmail.com (Torabisu)
Date: 13 Jan 2007 03:17:15 -0800
Subject: General Question About Python
In-Reply-To: <mailman.2684.1168670102.32031.python-list@python.org>
References: <1168254451.098796.144790@42g2000cwt.googlegroups.com>
	<1168586849.047301.301680@s34g2000cwa.googlegroups.com>
	<mailman.2684.1168670102.32031.python-list@python.org>
Message-ID: <1168687033.258472.16090@v45g2000cwv.googlegroups.com>


Hendrik van Rooyen wrote:
> "Torabisu" <tpawley at gmail.com> wrote:
>
>
> >
> > billie wrote:
> > > Torabisu wrote:
> > >
> > > > Its quite weird, we're looking for Python skills but are battling to
> > > > find at the moment...  Normally Python on its own will probably not
> > > > land you a job, but the last two companies I've worked for are doing
> > > > indepth Python development, so hopefully the tables are turning a bit.
> > >
> > > I can tell the same for Italy.
> > > Where are you from?
> >
> > Cape Town, South Africa.  There is a strong Unix following here, but
> > more on the System Administration side, not really the software
> > development side with regards to Python.  Python more being used for
> > task automation and shell scripting.
>
> What do you want done? - I am only a thousand miles away...
>
> - Hendrik

If I can just get my Python teleporter sorted out, distance will be no
problem...  A little buggy at the moment though...  Poor John, I told
him not to test it but oh well.



From could.net at gmail.com  Wed Jan 31 11:23:57 2007
From: could.net at gmail.com (Frank Potter)
Date: 31 Jan 2007 08:23:57 -0800
Subject: Any python scripts to do parallel downloading?
Message-ID: <1170260637.679856.39920@k78g2000cwa.googlegroups.com>

I want to find a multithreaded downloading lib in python,
can someone recommend one for me, please?
Thanks~



From bdesth.quelquechose at free.quelquepart.fr  Wed Jan 17 16:05:02 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 17 Jan 2007 22:05:02 +0100
Subject: How can I create a linked list in Python?
In-Reply-To: <1169009882.408482.43360@q2g2000cwa.googlegroups.com>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<eojb9v$92rq$1@netnews.upenn.edu>
	<45ad5104$0$393$426a74cc@news.free.fr>
	<1169009882.408482.43360@q2g2000cwa.googlegroups.com>
Message-ID: <45ae8950$0$31033$426a74cc@news.free.fr>

sturlamolden a ?crit :
> Bruno Desthuilliers wrote:
> 
> 
>>Implementing linked lists in Python is not a great deal - it just
>>doesn't make much sens.
> 
> 
> It does make sence,

Oh Yec ?-)

sorry...

> as there are memory constraints related to it.
> Python lists are arrays under the hood.  This is deliberately. Dynamic
> arrays grows faster than lists for the common "short list" case, and
> because indexing an array is O(1) instead of O(N) as it is for linked
> lists. You can easily break the performance of Python lists by adding
> objects in the middle of a list or appending objects to the end of long
> lists. At some point the list can not grow larger by a simple realloc,
> as it would crash with other objects on the heap, and the whole list
> must be replaced by a brand new memory segment.

That's certainly true - from a technical POV -, but I never had such a 
problem in now 7 years of Python programming.

> Also linked lists are an interesting theoretical concept in computer
> science. Understanding how dynamic datastructures work and their
> limitations are a key to understanding algorithms and how computers
> work in general.

Indeed. Did I say otherwise ?

> The simplest way of implementing a linked list in Python is nesting
> Python lists. 

Have you considered using tuples ? If you go the FP way, why not use an 
immutable type ?

(snip)

> Those who know Lisp should be familiar with the concept of creating
> dynamic data structures form nesting lists; it may be more unfamiliar
> to C and Pascal programmers, as these languages do not support such
> constructs.

But how are Lisp lists implemented then ?-)

I do totally agree that Lispish lists are something one should learn, 
but starting with a low-level procedural language with 'manual' memory 
management is certainly a Good Thing(tm). Well, IMHO at least (FWIW, 
having first learned to implement linked lists in C and Pascal, I had no 
problem understanding Lisp's list).

> In Python one may also use a more explicit solution
> involving classes for expressing linked lists, which would be more
> familiar to C and Pascal programmers. In any case, making linked lists
> are trivial in Python.
> 
Yes again. Hence my remark...


From apardon at forel.vub.ac.be  Mon Jan 15 04:55:59 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 15 Jan 2007 09:55:59 GMT
Subject: Boilerplate in rich comparison methods
References: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrneqmjtf.dtf.apardon@rcpc42.vub.ac.be>

On 2007-01-13, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> I'm writing a class that implements rich comparisons, and I find myself
> writing a lot of very similar code. If the calculation is short and
> simple, I do something like this:
>
>
> class Parrot:
>     def __eq__(self, other):
>         return self.plumage() == other.plumage()
>     def __ne__(self, other):
>         return self.plumage() != other.plumage()
>     def __lt__(self, other):
>         return self.plumage() < other.plumage()
>     def __gt__(self, other):
>         return self.plumage() > other.plumage()
>     def __le__(self, other):
>         return self.plumage() <= other.plumage()
>     def __ge__(self, other):
>         return self.plumage() >= other.plumage()

Well one thing you could do is write the following class:

Comparators = SomeEnumWith("eq, ne, lt, gt, ge, le, ge")

class GeneralComparator:
  def __eq__(self, other):
    return Comparators.eq in self.__compare__(self, other)
  def __ne__(self, other):
    return Comparators.ne in self.__compare__(self, other)
  def __lt__(self, other):
    return Comparators.lt in self.__compare__(self, other)
  def __le__(self, other):
    return Comparators.le in self.__compare__(self, other)
  def __gt__(self, other):
    return Comparators.gt in self.__compare__(self, other)
  def __ge__(self, other):
    return Comparators.ge in self.__compare__(self, other)


Then write your Parrot class as follows:

  class Parrot (GeneralComparator):
    def __compare__(self, other):
      return a set which defines which comparisons should return true.

-- 
Antoon Pardon


From wehbrink at web.de  Sat Jan 20 04:46:46 2007
From: wehbrink at web.de (Mario Wehbrink)
Date: Sat, 20 Jan 2007 10:46:46 +0100
Subject: Code reformater?
References: <poe3r2ha92p6vrhtk9b2piso337djv4boo@4ax.com>
Message-ID: <615984-ot3.ln1@pluto.fqdn.th-h.de>

Vincent Delporte schrieb in comp.lang.python:

Hi

> 	When I copy/paste Python code from the web, every so often,
> the TABs are wrong, which means that the code won't work and I have to
> manually reformat the code.
>
> Is there a code reformater that can parse the code to make it right?

It may help to look at the settings of your editor. I think Vim (and
surely emacs) can help you with that.

(look at :help retab, paste, expandtab in (g)Vim)

Mario


-- 
Mario Wehbrink


From casevh at comcast.net  Thu Jan  4 03:03:40 2007
From: casevh at comcast.net (casevh at comcast.net)
Date: 4 Jan 2007 00:03:40 -0800
Subject: code optimization (calc PI) / Full Code of PI calc in Python and
	C.
In-Reply-To: <pan.2007.01.04.07.46.56.971023@gmx.net>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
	<459BFDCB.4000503@sschwarzer.net>
	<UGXmh.194$9v1.250@nntpserver.swip.net>
	<1167872076.937415.250340@11g2000cwr.googlegroups.com>
	<cuYmh.201$9v1.239@nntpserver.swip.net>
	<pan.2007.01.04.07.46.56.971023@gmx.net>
Message-ID: <1167897820.603957.239850@51g2000cwl.googlegroups.com>


> Here is my attempt to convert the C code, not written with speed in mind
> and I was too lazy too time it.  :-)
>
> from itertools import izip
>
> def pi():
>     result = list()
>     d = 0
>     e = 0
>     f = [2000] * 2801
>     for c in xrange(2800, 0, -14):
>         for b, g in izip(xrange(c, 1, -1), xrange((c * 2) - 1, 0, -2)):
>             d += f[b] * 10000
>             h, f[b] = divmod(d, g)
>             d = h * b
>         h, i = divmod(d, 10000)
>         result.append('%.4d' % (e + h))
>         e = i
>     return ''.join(result)
>

Your version: .36 seconds

It's ugly, but unrolling the divmod into two separate statements is
faster for small operands. The following takes .28 seconds:

from time import clock
from itertools import izip

def pi():
    result = list()
    d = 0
    e = 0
    f = [2000] * 2801
    for c in xrange(2800, 0, -14):
        for b, g in izip(xrange(c, 1, -1), xrange((c * 2) - 1, 0, -2)):
            d += f[b] * 10000
            f[b] = d % g
            h = d // g
            d = h * b
        h, i = divmod(d, 10000)
        result.append('%.4d' % (e + h))
        e = i
    return ''.join(result)

start_time = clock()
pi = pi()
print pi
print "Total time elapsed:", round(clock() - start_time, 2), "s"
print len(pi)

casevh



From spammers-die at spam.microsoft.com  Wed Jan 31 07:07:49 2007
From: spammers-die at spam.microsoft.com (John McCallum)
Date: Wed, 31 Jan 2007 12:07:49 +0000
Subject: BYU Physics Prof Finds Thermate in WTC Physical Samples,
	Building Collapses an Inside Job
References: <1170200864.492655.11850@s48g2000cws.googlegroups.com>
	<45bff548$0$97249$892e7fe2@authen.yellow.readfreenews.net>
Message-ID: <pan.2007.01.31.12.07.48.720658@spam.microsoft.com>

On Tue, 30 Jan 2007 19:48:45 -0600, soutjhyDin wrote:

> <stj911 at rock.com> wrote in message 
> news:1170200864.492655.11850 at s48g2000cws.googlegroups.com...
>> http://portland.indymedia.org/en/2006/06/341238.shtml
>>
>> BYU Physics Prof Finds Thermate in WTC Physical Samples, Building
>> Collapses an Inside Job
> 
> [...]
> 
> The Iron Oxide(s), dummy.

This is way off topic in most of the groups it has been posted to.
Please restrict replies to the only one that seems remotely relevant:

soc.culture.usa

We can just plonk the original author, and I'm sure most have, but when
others reply we need to plonk them too. It's just more effort. ;)

Cheers,
John McCallum
Edinburgh



From ptmcg at austin.rr.com  Wed Jan 24 13:49:00 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 24 Jan 2007 10:49:00 -0800
Subject: Simple Matrix class
In-Reply-To: <mailman.3094.1169659321.32031.python-list@python.org>
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>
	<mailman.3049.1169600368.32031.python-list@python.org>
	<1169602411.917985.89840@l53g2000cwa.googlegroups.com>
	<mailman.3051.1169604934.32031.python-list@python.org>
	<1169617221.481444.135820@v45g2000cwv.googlegroups.com>
	<mailman.3094.1169659321.32031.python-list@python.org>
Message-ID: <1169664540.120687.211350@s48g2000cws.googlegroups.com>

On Jan 24, 11:21 am, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Wednesday 24/1/2007 02:40, Paul McGuire wrote:
>
> > > The points should be aligned on a log-log plot to be a power function.
> > > As Robert Kern stated before, this problem should be not worse than
> > > O(n**3) - how have you implemented it?
>
> >Sure enough, the complete equation is t = 5e-05exp(1.1n), or t = 5e-05
> >X 3**n.
>
> So either reimplement it better, or place a notice in BIG letters to
> your users about the terrible time and memory penalties of using inverse()
>

Well, really, the "terrible time and memory penalties" aren't all that
terrible for matrices up to, oh, 10x10 or so, but you wouldn't want to
use this on anything much larger than that.  Hey, guess what?!  That's
exactly what I said in my original post!

And the purpose/motivation for "reimplementing it better" would be
what, exactly?  So I can charge double for it?  As it was, I felt a
little guilty for posting a solution to such a likely homework
assignment, but now there's room for a student to implement a kickass
inverter routine in place of the crappy-but-useful-for-small-matrices
brute force one I've written.

Cubs win!
-- Paul



From redefined.horizons at gmail.com  Mon Jan 22 14:07:49 2007
From: redefined.horizons at gmail.com (Scott Huey)
Date: 22 Jan 2007 11:07:49 -0800
Subject: Best way to document Python code...
Message-ID: <1169492869.101706.253620@38g2000cwa.googlegroups.com>

I am working on a Python module and I would like to prepare some API
documentaiton. I managed to find epydoc after some searching online.

Is there a standard way to document the API for Python modules? Is
epydoc the best way to go if there is no standard? Are there other ways
to document a Python API?

Thanks,

Scott Huey



From bdesth.quelquechose at free.quelquepart.fr  Mon Jan 22 15:06:29 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 22 Jan 2007 21:06:29 +0100
Subject: instancemethod
In-Reply-To: <mailman.2961.1169417800.32031.python-list@python.org>
References: <mailman.2961.1169417800.32031.python-list@python.org>
Message-ID: <45b51298$0$8289$426a74cc@news.free.fr>

Gert Cuykens a ?crit :
> import MySQLdb
> 
> class Db:
(snip)
>    def excecute(self,cmd):
>        self._cursor.execute(cmd)
>        self._db.commit()
> 
What about autocommit and automagic delegation ?

import MySQLdb

class Db(object):
    def __init__(self,server, user, password, database):
        self._db = MySQLdb.connect(server , user , password , database)
        self._db.autocommit(True)
        self._cursor = self._db.cursor()

    def close(self):
        self._cursor.close()
        self._db.close()

    def __del__(self):
        try:
            self.close()
        except:
            pass

    def __getattr__(self, name):
        attr = getattr(
            self._cursor, name,
            getattr(self._db, name,  None)
        )
        if attr is None:
            raise AttributeError(
                "object %s has no attribute %s" \
                 % (self.__class__.__name__, name)
                )
        return attr

(NB :not tested...)


From bearophileHUGS at lycos.com  Fri Jan 26 22:04:08 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 26 Jan 2007 19:04:08 -0800
Subject: dict.keys() ?
Message-ID: <1169867048.004256.279240@v33g2000cwv.googlegroups.com>

The PEP 3100:
http://www.python.org/dev/peps/pep-3100/
says:

Return iterators instead of lists where appropriate for atomic type
methods (e.g. dict.keys(), dict.values(), dict.items(), etc.); iter*
methods will be removed. Better: make keys(), etc. return views ala
Java collections???
...
To be removed:
   dict.setdefault()? [15]
   dict.has_key() method [done]


I may be sleepy now, but maybe the keys() method too can be removed;
otherwise the following two become really the same:

print list(adict)
for k in adict: ...

print list(adict.keys())
for k in adict.keys(): ...

Bye,
bearophile



From http  Mon Jan  8 07:33:46 2007
From: http (Paul Rubin)
Date: 08 Jan 2007 04:33:46 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
	<pan.2007.01.07.22.10.37.701405@REMOVE.THIS.cybersource.com.au>
	<7xlkke19he.fsf@ruckus.brouhaha.com>
	<pan.2007.01.08.07.28.02.494235@REMOVEME.cybersource.com.au>
	<7xirfiyn3y.fsf@ruckus.brouhaha.com>
	<pan.2007.01.08.10.37.54.614464@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xodp9puj9.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> > I have no idea how often if ever.
> 
> You've established that there's a name conflict when you do so, which
> leads to bugs. So how often do you get bitten by that particular type of bug?

I don't know.  Likely zero, possibly not.  I'm sure I've written many
bugs that have never been detected by me or anyone else.  I've
probably written bugs that crashed an application for some user but
they just cursed me out and never bothered to tell me about the crash.
Maybe I've even written bugs that leaked a user's private data without
the user noticing, but discovered by some attacker intercepting the
data who is cackling about the bug while keeping it secret.  There's
no way for me to think I'll ever find out.

I'd much prefer to be able to say of any type of bug, "the number is
exactly zero as a known fact, because it's inherent in Python's design
that it's impossible to have that type of bug".  Language designs
should aim to let programmers say things like that as often as possible.

> class MySubClass(SomeSuperclass): ...
>         raise ValueError("Name conflict with private attribute!") 
> Problem solved.

No good, Python allows creating classes and attributes on the fly.
The superclass could create its private variable after the subclass is created.

> The truth of the matter is, MyClass.__private is not private at all. It is
> still a public attribute with a slightly unexpected name. In other words,
> if you want to code defensively, you should simply assume that Python has
> no private attributes, and code accordingly.
> 
> Problem solved.

Well, "problem moved", not "problem solved".  Now you have the problem
of having to know the names of every attribute any related class might
use when you write your own class.  That is why other languages have
private variables and Python has name mangling--to solve a real problem.
Except Python's solution is a leaky kludge.


From martin.witte at gmail.com  Mon Jan 29 14:48:05 2007
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 29 Jan 2007 11:48:05 -0800
Subject: Conversion of string to integer
In-Reply-To: <1170078933.180025.229830@k78g2000cwa.googlegroups.com>
References: <1170078933.180025.229830@k78g2000cwa.googlegroups.com>
Message-ID: <1170100085.505577.211470@v33g2000cwv.googlegroups.com>



On Jan 29, 2:55 pm, "jupiter" <anil.jupit... at gmail.com> wrote:
> Hi guys,
>
> I have a problem. I have a list which contains strings and numeric.
> What I want is to compare them in loop, ignore string and create
> another list of numeric values.
>
> I tried int() and decimal() but without success.
>
> eq of problem is
>
> #hs=string.split(hs)
> hs =["popopopopop","254.25","pojdjdkjdhhjdccc","25452.25"]
>
> j=0
>     for o in range(len(hs)):
>         print hs[o],o
>         p=Decimal(hs[o])
>         if p > 200: j+=j
>         print "-"*5,j
>     print "*"*25
>
> I could be the best way to solve this ......?
>
> @nil

function isinstance can help you to determine the type/class of an 
object:

py>hs =["popopopopop","254.25","pojdjdkjdhhjdccc","25452.25"]
py>
py>for i in hs:
py>    if isinstance(i, str):
py>        print str(i)
py>    elif isinstance(i, float):
py>        print float(i)
py>    elif isinstance(i, int):
py>        print int(i)
py>    else:
py>        print 'dunno type of this element: %s' % str(i)
popopopopop
254.25
pojdjdkjdhhjdccc
25452.25



From rridge at csclub.uwaterloo.ca  Thu Jan 18 20:57:00 2007
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 18 Jan 2007 17:57:00 -0800
Subject: Determining when a file is an Open Office Document
References: <eop5ci$et5$1@solaris.cc.vt.edu>
Message-ID: <1169171820.851021.49200@l53g2000cwa.googlegroups.com>

tubby wrote:
> Silly question, but here goes... what's a good way to determine when a
> file is an Open Office document? I could look at the file extension, but
> it seems there would be a better way. VI shows this info in the files:
>
> mimetypeapplication/vnd.oasis.opendocument.textPK

It's a ZIP archive.  The info you've found are the file name
"mimetype", the uncompressed contents of that file
"application/vnd.oasis.opendocument.text", and part of the ZIP magic
number "PK".  You should be able to use the "zipfile" module to check
to see if the file a ZIP file, if it has a member named "mimetype" and
if the contents of the file match one of the OpenOffice MIME types.

                                      Ross Ridge



From nospam at nospam.invalid  Wed Jan  3 18:30:45 2007
From: nospam at nospam.invalid (Russell Owen)
Date: Wed, 03 Jan 2007 15:30:45 -0800
Subject: static object
References: <459c306c$0$314$426a74cc@news.free.fr>
Message-ID: <nospam-71F552.15304503012007@gnus01.u.washington.edu>

In article <459c306c$0$314$426a74cc at news.free.fr>,
 meelab <meelab at free.fr> wrote:

> Dear All,
> 
> I am looking for a way to create a "static object" or a "static class" -
> terms might be inappropriate - having for instance:
> 
> class StaticClass:
>     .
>     .
> 
> and then
> staticObject1 = StaticClass()
> staticObject2 = StaticClass()
> 
> so that staticObject1 and staticObject2 refers exactly to the same
> instance of object.

Personally I do the following (in its own module). There may be a better 
way, but this is simple and it works:

_theSingleton = None

def getSingleton():
   global _theSingleton
   if not _theSingleton:
      _theSingleton = _Singleton()
   return _theSingleton

class _Singleton:
   def __init__(self, ...):
      ...


-- Russell


From hg at nospam.org  Fri Jan  5 04:45:57 2007
From: hg at nospam.org (hg)
Date: Fri, 05 Jan 2007 10:45:57 +0100
Subject: importing / loading a module / class dynamically
References: <o1vnh.281$rv1.88@newsfe21.lga>
Message-ID: <1hvnh.22241$Dy2.9812@newsfe20.lga>

hg wrote:

> Hi,
> 
> I have the following problem.
> 
> I find in a directory hierarchy some files following a certain sets of
> rules:
> 
> .../.../../plugin/name1/name1.py
> ....
> .../.../../plugin/namen/namen.py
> 
> each file will in turn have a class with the same name as the filename
> (minus .py)
> 
> 
> I fetch those names in a list of string and want to import the files /
> instantiate the classes.
> 
> 
> I block at the beginning and tried this (test.py is a real file)
>>>> s = 'test.py'
>>>> eval ('import ' + s)
> 
> and get
> 
> Traceback (most recent call last):
>   File "<pyshell#1>", line 1, in -toplevel-
>     eval ('import ' + s)
>   File "<string>", line 1
>     import test.py
> 
> Any clue ?
> 
> Thanks
> 
> hg


OK, from http://mail.python.org/pipermail/python-list/2004-July/272081.html,
I need to use exec and not eval

hg



From boyee118 at gmail.com  Tue Jan  9 05:48:41 2007
From: boyee118 at gmail.com (boyeestudio)
Date: Tue, 9 Jan 2007 18:48:41 +0800
Subject: I compile the Pychm in windows,But meet a lot of errors......
Message-ID: <d2d5d61d0701090248g63646bbdn16505cc409d1be3a@mail.gmail.com>

The Error is show as below:

D:\Downloads\pychm-0.8.4>python setup.py build
running build
running build_py
running build_ext
building 'chm._chmlib' extension
D:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\link.exe /DLL
/nologo
 /INCREMENTAL:NO /LIBPATH:D:\Python24\libs /LIBPATH:D:\Python24\PCBuild
chm.lib
/EXPORT:init_chmlib build\temp.win32-2.4\Release\chm/swig_chm.obj/OUT:build\lib
.win32-2.4\chm\_chmlib.pyd /IMPLIB:build\temp.win32-
2.4\Release\chm\_chmlib.lib
LIBC.lib(crt0init.obj) : error LNK2005: ___xc_z ??? MSVCRT.lib(cinitexe.obj)
???
LIBC.lib(crt0init.obj) : error LNK2005: ___xc_a ??? MSVCRT.lib(cinitexe.obj)
???
LIBC.lib(crt0init.obj) : error LNK2005: ___xi_z ??? MSVCRT.lib(cinitexe.obj)
???
LIBC.lib(crt0init.obj) : error LNK2005: ___xi_a ??? MSVCRT.lib(cinitexe.obj)
???
LIBC.lib(crt0init.obj) : warning LNK4006: ___xc_z ?? MSVCRT.lib(cinitexe.obj
)
????????????
LIBC.lib(crt0init.obj) : warning LNK4006: ___xc_a ?? MSVCRT.lib(cinitexe.obj
)
????????????
LIBC.lib(crt0init.obj) : warning LNK4006: ___xi_z ?? MSVCRT.lib(cinitexe.obj
)
????????????
LIBC.lib(crt0init.obj) : warning LNK4006: ___xi_a ?? MSVCRT.lib(cinitexe.obj
)
????????????
   ????? build\temp.win32-2.4\Release\chm\_chmlib.lib ??? build\temp.win
32-2.4\Release\chm\_chmlib.exp
LINK : warning LNK4098: ???"MSVCRT"???????????? /NODEFAULTLIB:l
ibrary
LINK : warning LNK4098: ???"LIBC"???????????? /NODEFAULTLIB:lib
rary
build\lib.win32-2.4\chm\_chmlib.pyd : fatal error LNK1169: ??????????
????
error: command '"D:\Program Files\Microsoft Visual Studio .NET
2003\Vc7\bin\link
.exe"' failed with exit status 1169

How to fix this problem???
PS: if someone has compile it successfully in windows,Please send me a
copy!!!
Thanks a lot!!
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070109/619adba2/attachment.html>

From larry.bates at websafe.com  Thu Jan 25 19:49:53 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 25 Jan 2007 18:49:53 -0600
Subject: difflib qualm
In-Reply-To: <mailman.3132.1169691995.32031.python-list@python.org>
References: <2adc542f0701241805i79b79580y2522ec854e49621d@mail.gmail.com>
	<mailman.3132.1169691995.32031.python-list@python.org>
Message-ID: <4-CdnZBrjaO4zSTYnZ2dnUVZ_v6tnZ2d@comcast.com>

Gabriel Genellina wrote:
> At Wednesday 24/1/2007 23:05, Sick Monkey wrote:
> 
>> I am trying to write a python script that will compare 2 files which
>> contains names (millions of them).
>>
>> More specifically, I have 2 files (Files1.txt and Files2.txt). 
>> Files1.txt contains 180 thousand names and Files2.txt contains 34
>> million names.
>>
>> I have a script which will analyze these two files and store them into
>> 2 different lists (fileList1 and fileList2 respectivly).  I have
>> imported the diflib library and after the lists are created, matching
>> on the following criteria " " for diflib -> (just the names that are
>> similar between the two files).
>>
>> This works perfectly for hundreds of names but is taking forever for
>> millions of them; thus not really efficient.
>>
>> Does anyone have any idea on how to get this more efficient? 
>> (speaking of Time and RAM)
>>
>> Any advice would be greatly appreciated.   (NOTE:  I have been trying
>> to study multithreading, but have not really grasp the concept.  So I
>> may need some examples.)
> 
> When you say "names" you mean people's names? So you want to match, say,
> Levenshtein Vladimir to Lebenstain V.? And you only have the names to
> match?
> Not a good candidate for difflib. See this paper:
> Record Linkage: A Machine Learning Approach, A Toolbox, and A Digital
> Government Web Service (2003)
> Mohamed G. Elfeky, Vassilios S. Verykios, Ahmed K. Elmagarmid, Thanaa M.
> Ghanem, Ahmed R. Huwait.
> http://citeseer.ist.psu.edu/elfeky03record.html
> and you can get other pointers from the Levenshtein distance article in
> Wikipedia and http://en.wikipedia.org/wiki/Fuzzy_string_searching
> 
> 

One approach:

Put the big list of names in a database and create soundex keys for the names
and make the soundex keys an index so you can search quickly.  Databases
are really good at storing data that is searchable via an index.  If you REALLY
need speed you can consider an in-memory database.

Create soundex keys for each name in your small list and query the database
with this key into the table in the DB that is indexed on soundex keys.
If you get a hit, the key is sufficiently "alike" to be a candidate.  I'll
leave the remainder to you.  Perhaps there is other information that will
help determine if there is a match?

-Larry Bates


From walter at livinglogic.de  Wed Jan 31 04:15:25 2007
From: walter at livinglogic.de (=?ISO-8859-1?Q?Walter_D=F6rwald?=)
Date: Wed, 31 Jan 2007 10:15:25 +0100
Subject: Unicode error handler
In-Reply-To: <45C049EA.60009@v.loewis.de>
References: <epdmae$qps$1@sea.gmane.org>
	<mailman.3314.1170174675.32031.python-list@python.org>
	<45C049EA.60009@v.loewis.de>
Message-ID: <45C05E2D.80205@livinglogic.de>

Martin v. L?wis wrote:

> Walter D?rwald schrieb:
>> You might try the following:
>>
>> # -*- coding: iso-8859-1 -*-
>>
>> import unicodedata, codecs
>>
>> def transliterate(exc):
>> 	if not isinstance(exc, UnicodeEncodeError):
>> 		raise TypeError("don'ty know how to handle %r" % r)
>> 	return (unicodedata.normalize("NFD", exc.object[exc.start])[:1],
>> exc.start+1)
> 
> I think a number of special cases need to be studied here.
> I would expect that this is "semantically correct" if the characters
> being dropped are combining characters (at least in the languages I'm
> familiar with, it is common to drop them for transliteration).

True, it might make sense to limit the error handler to handling latin 
characters.

> However, if you do
> 
> py> for i in range(65536):
> ...   c = unicodedata.normalize("NFD", unichr(i))
> ...   for c2 in c[1:]:
> ...     if not unicodedata.combining(c2): print hex(i),;break
> 
> you'll see that there are many characters which don't decompose
> into a base character + sequence of combining characters. In
> particular, this involves all hangul syllables (U+AC00..U+D7A3),
> for which it is just incorrect to drop the "jungseongs"
> (is that proper wording?).

Of course the above error handler only makes sense, when the decomposed 
codepoints are encodable in the target encoding. For your hangul example 
neither u"\ac00" nor the decomposed version u"\u1100\u1161" er encodable.

> There are also some cases which I'm completely uncertain about,
> e.g. ORIYA VOWEL SIGN AI decomposes to ORIYA VOWEL SIGN E +
> ORIYA AI LENGTH MARK. Is it correct to drop the length mark?
> It's not listed as a combining character. Likewise,
> MYANMAR LETTER UU decomposes to MYANMAR LETTER U +
> MYANMAR VOWEL SIGN II; same question here.

Servus,
    Walter



From jerzy.zielinski at gmail.com  Wed Jan 24 16:37:22 2007
From: jerzy.zielinski at gmail.com (Zielinski)
Date: 24 Jan 2007 13:37:22 -0800
Subject: matplotlib button problem
Message-ID: <1169674642.577269.88950@l53g2000cwa.googlegroups.com>

Hi,

Recently I started to use matplotlib with python. Now I would like to
have interaction with my plots. Here is the problem:

I have a long vector of data, to long to display it on one picture,
because of, well you know to much data to big mess... so I decided to
extract some data from long_vector to short_vector with 100 elements.
So I have:
   data_position = 1
   interval = 100
   for i in range (0, interval):
      short_vector[i] = long_vector[data_position*interval + i]

Then I plot it. works fine...
Now I created a button "next" I would like to press it and change the
data_position to +1 every time i press it, of course, and redraw the
picture. It can be a key on the keyboard, I don't care.

Bottom line: how to change the global variable with the button in
matplotlib, and redraw a picture using this variable

Thanks for help
Jerzy
jerzy.zielinski at gmail.com



From steven.bethard at gmail.com  Wed Jan 10 12:10:51 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 10 Jan 2007 10:10:51 -0700
Subject: An iterator with look-ahead
In-Reply-To: <slrneq9ubo.bg.horpner@FIAD06.norwich.edu>
References: <slrneq9ubo.bg.horpner@FIAD06.norwich.edu>
Message-ID: <dMqdnTbhALKBgzjYnZ2dnUVZ_oupnZ2d@comcast.com>

Neil Cerutti wrote:
> For use in a hand-coded parser I wrote the following simple
> iterator with look-ahead.

There's a recipe for this:

   http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/304373

Note that the recipe efficiently supports an arbitrary look-ahead, not 
just a single item.

> I haven't thought too deeply about what peek ought to return
> when the iterator is exhausted. Suggestions are respectfully
> requested.

In the recipe, StopIteration is still raised on a peek() operation that 
tries to look past the end of the iterator.

STeVe


From steveo at syslang.net  Thu Jan 11 11:21:32 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Thu, 11 Jan 2007 11:21:32 -0500 (EST)
Subject: dot operations
In-Reply-To: <eo548v$mr4$1@news.albasani.net>
References: <1168511200.252193.132340@p59g2000hsd.googlegroups.com>
	<eo548v$mr4$1@news.albasani.net>
Message-ID: <Pine.LNX.4.64.0701111119060.20936@saturn.syslang.net>

On Thursday, Jan 11th 2007 at 11:41 +0100, quoth robert:

=>jm.suresh at no.spam.gmail.com wrote:
=>> Hi,
=>>  Frequently I get to do like this:
=>> a = (1, 2, 3, 4) # some dummy values
=>> b = (4, 3, 2, 1)
=>> import operator
=>> c = map(operator.add, a, b)
=>> 
=>> I am finding the last line not very readable especially when I combine
=>> couple of such operations into one line. Is it possible to overload
=>> operators, so that, I can use .+ for element wise addition, as,
=>> c = a .+ b
=>> which is much more readable.
=>> 
=>> Similarly, I want to use .- , .*, ./   . Is it possible to do?
=>
=>import numpy
=>
=>You'll not even need dots

I'm very new so my plea to be gentle is still on.

I just looked at the numpy package. Seems very cool, but for the life of 
me I didn't understand the method by which python allows for creation of 
infix operators. Can someone please explain or point me to a reference?

TIA

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From thn at mail.utexas.edu  Sun Jan 28 15:46:07 2007
From: thn at mail.utexas.edu (Thomas Nelson)
Date: 28 Jan 2007 12:46:07 -0800
Subject: Trouble with max() and __cmp__()
Message-ID: <1170017167.165222.325800@a34g2000cwb.googlegroups.com>

My code:

class Policy(list):
    def __cmp__(self,other):
        return cmp(self.fitness,other.fitness)

j = Policy()
j.fitness = 3
k = Policy()
k.fitness = 1
l = Policy()
l.fitness = 5
print max([j,k,l]).fitness

prints 3, when I was expecting it to print 5.  What have I done wrong?

Thanks for the help,
THN



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Jan 31 07:35:39 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 31 Jan 2007 13:35:39 +0100
Subject: Sorting a List of Lists
In-Reply-To: <1170201351.881776.257790@q2g2000cwa.googlegroups.com>
References: <1170201351.881776.257790@q2g2000cwa.googlegroups.com>
Message-ID: <45c08cd3$0$22805$426a74cc@news.free.fr>

apotheos at gmail.com a ?crit :
> I can't seem to get this nailed down and I thought I'd toss it out 
> there as, by gosh, its got to be something simple I'm missing.
> 
> I have two different database tables of events that use different 
> schemas. I am using python to collate these records for display. I do 
> this by creating a list of lists that look roughly like this:
> 
> events = [['Event URL as String', 'Event Title as String ', Event Date 
> as Datetime], ...]

Then you should not use a list of lists, but a list of tuples.

> I then thought I'd just go events.sort(lambda x,y: x[2]<y[2]) and call 
> it a day. That didn't work. But then lamda functions like to be very 
> simple, maybe object subscripts aren't allowed (even though I didn't 
> get an error). So I wrote a comparison function that looks much as you 
> would expect:
> 
> def date_compare(list1, 
> list2):
>     x = list1[2]
>     y = list2[2]
>     if 
> x>y:
>         return 
> 1
>     elif 
> x==y:
>         return 
> 0
>     else: # 
> x<y
>         return -1
> 
> But as before sorting with this function returns None.
> 
> What have I overlooked?

Lol.

I guess this is a FAQ. list.sort() performs a destructive in-place sort, 
and always return None. This is in the FineManual:

bruno at bruno:~$ python
Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02)
[GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> help(list.sort)
Help on method_descriptor:

sort(...)
     L.sort(cmp=None, key=None, reverse=False) -- stable sort *IN PLACE*;
     cmp(x, y) -> -1, 0, 1

You may want to use sorted(iterable, cmp=None, key=None, reverse=False) 
if you don't want to sort in-place.

Also, using comparison functions is usually not the most efficient way 
to do such a sort. In your case, I'd go for a good old 
Decorate/sort/undecorate (AKA schwarzian transform):

events = [evt for date, evt in
           sorted([(evt[2], evt) for evt in events])]


HTH


From nulla.epistola at web.de  Wed Jan 24 14:47:26 2007
From: nulla.epistola at web.de (Hertha Steck)
Date: Wed, 24 Jan 2007 20:47:26 +0100
Subject: Python Windows Editors
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<1169415514.562496.248950@a75g2000cwd.googlegroups.com>
	<cDTsh.36657$Gr2.3763@newssvr21.news.prodigy.net>
Message-ID: <pan.2007.01.24.19.47.25.813947@web.de>

Am Mon, 22 Jan 2007 00:33:12 +0000 schrieb W. Watson:

> mensanator at aol.com wrote:
>> W. Watson wrote:
>>> I downloaded python-2.5.msi and installed it. I believe its editor is IDE. I
>>> understand there's a Win editor called pythonwin. I believe it's in the
>>> download pywin32-210.win32-py2.5.exe, but I'm not sure if this exe file has
>>> just the editor or all of Python. Comments? If not how do I get the
>>> PythonWin editor by itself?

By "IDE" you mean IDLE, don't you?

>> 
>> Print your files from Notepad, after all, they're just text files.
>> But IDLE has more usefull Formatting options.
> Thanks. Already did it, but used Word. I can get line numbers in that way.

And you are absolutely certain you won't never, ever, detect a typo when
you have your script open in Word, correct it, save the file and try to
use the resulting mess as a Python script? Or does Word leave it as a text
file in such a case? I never dare to open source code in Word, so I'm not
really sure.

Hertha



From laurent.pointal at limsi.fr  Tue Jan 23 03:51:09 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 23 Jan 2007 09:51:09 +0100
Subject: beep or sound playing under linux
In-Reply-To: <pFath.50034$oA1.40310@newsfe19.lga>
References: <pFath.50034$oA1.40310@newsfe19.lga>
Message-ID: <ep4j69$j5m$1@upsn250.cri.u-psud.fr>

hg a ?crit :
> Hi,
> 
> Is there a way to do that ?
> 
> Regards,
> 
> hg
> 

Some links:

Official doc:
http://docs.python.org/lib/mmedia.html
  ==> http://docs.python.org/lib/module-ossaudiodev.html

PyAudio (binding to portaudio):
  ==> http://people.csail.mit.edu/hubert/pyaudio/

Maybe with pyGame (and SDL):
  ==> http://www.pygame.org/




From pavlovevidence at gmail.com  Sun Jan  7 17:40:38 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 7 Jan 2007 14:40:38 -0800
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <1168130960.670978.111850@s34g2000cwa.googlegroups.com>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
	<1168042215.514023.121560@s80g2000cwa.googlegroups.com>
	<1168048620.409190.85870@v33g2000cwv.googlegroups.com>
	<1168130960.670978.111850@s34g2000cwa.googlegroups.com>
Message-ID: <1168209637.965967.23790@s34g2000cwa.googlegroups.com>


Martin Miller wrote:
> Carl Banks wrote:
>
> > Martin Miller wrote:
> > > ### non-redundant example ###
> > > import sys
> > >
> > > class Pin:
> > >     def __init__(self, name, namespace=None):
> > >         self.name = name
> > >         if namespace == None:
> > >             # default to caller's globals
> > >             namespace = sys._getframe(1).f_globals
> > >         namespace[name] = self
> > >
> > > Pin('aap')      # create a Pin object named 'aap'
> > > Pin('aap2')     # create a Pin object named 'aap2'
> > > print aap.name
> > > print aap2.name
> >
> > The problem with this is that it only works for global namespaces,
> > while failing silently and subtly if used in a local namespace:
>
> Oh, contrair. It would work fine with local namespaces simply by
> overriding the default value of the optional 'namepace' parameter (see
> below).

Did you try it?

> > def fun():
> >     Pin('aap')
> >     aap1 = aap
> >     fun2()
> >     aap2 = aap
> >     print aap1 is aap2
> >
> > def fun2():
> >     Pin('aap')
> >
> > If it's your deliberate intention to do it with the global namespace,
> > you might as well just use globals() and do it explicitly, rather than
> > mucking around with Python frame internals.  (And it doesn't make the
> > class unusable for more straightforward uses.)
>
> You could be more explicit by just passing 'globals()' as a second
> parameter to the __init__ constructor (which is unnecessary, since
> that's effectively the default).
>
> It's not clear to me how the example provided shows the technique
> "failing silently and subtly if used in a local namespace" because what
> happens is exactly what I would expect if the constructor is called
> twice with the same string and defaulted namespace -- namely create
> another object and make the existing name refer to it. If one didn't
> want the call to Pin in fun2 to do this, just change fun2 to this:

Because the usage deceptively suggests that it defines a name in the
local namespace.  Failing may be too strong a word, but I've come to
expect a consistent behavior w.r.t. namespaces, which this violates, so
I think it qualifies as a failure.

> def fun2():
>     Pin('aap', locals())

Did you actually try this?  Better yet, try this function.  Make sure
aap isn't defined as a global:

def fun3():
    Pin('aap',locals())
    print aap

(I get NameError.)

> This way the "print aap1 is aap2" statement in fun() would output
> "true" since the nested call to Pin would now (explicitly) cause the
> name of the new object to be put into fun2's local namespace leaving
> the global one created by the call in fun() alone.

Did you try it?

> Obviously, this was not an objection I anticipated. An important one I
> would think is the fact that the current documentation says that
> f_globals is a special *read-only* attribute of a frame object implying
> that it shouldn't be changed (even though doing so 'works' as my
> example illustrates).

That means it can't be rebound.  It doesn't mean you can't modify the
object.  Nevertheless, frame objects are an internal feature of Python,
not guaranteed to work for other incarnations of Python (it doesn't
even exist in IronPython, for example), and subject to change.  And
what you want to do is easily done in a platform generic way without
using sys._getframe.

> I think other valid arguments against this practice might include
> whether it's an example of good OOP, or a good programming practice at
> all, since it involves possibly subtle side-effects, the use of global
> variables, and/or is 'unpythonic'.

I think programmatically creating variables is fine; I just recommend
you not use sys._getframe, nor the automagical namespace self-insertion
class, to do it.

> Certainly the approach is not without caveats. Despite them, I believe
> it can be useful in some contexts, as long as what is going on is
> clearly understood. The point of my reply to the OP was mainly just to
> illustrate the power and flexibility of Python to the newbie. I guess
> to that I should have also added that it gives you "enough rope to
> shoot yourself" as Allen Holub said regarding C++.
> Cheers,
> -Martin



Carl Banks



From entengk at gmail.com  Mon Jan  8 06:07:31 2007
From: entengk at gmail.com (Enteng)
Date: 8 Jan 2007 03:07:31 -0800
Subject: General Question About Python
Message-ID: <1168254451.098796.144790@42g2000cwt.googlegroups.com>

To those who program in python, what programs do you do?
Also what community projects are you involved in(OSS probably)?
Will mastering the language land me a job?

I'm thinking about learning the language as a hobby. Just curious :)



From jorge.vargas at gmail.com  Fri Jan  5 16:08:19 2007
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Fri, 5 Jan 2007 17:08:19 -0400
Subject: MySQLdb windows binaries for Python 2.5?? Yes,
	but from a World of Warcraft guild.
In-Reply-To: <4866bea60701051151v4f7942bj2921b2143a18a092@mail.gmail.com>
References: <1162408100.985370.148650@m7g2000cwm.googlegroups.com>
	<mailman.2093.1163244341.11739.python-list@python.org>
	<Fgkgh.9311$hI.6215@newssvr11.news.prodigy.net>
	<Ulmgh.70$u%4.58@newsfe04.lga>
	<1166144355.616642.127080@n67g2000cwd.googlegroups.com>
	<x1pgh.9356$hI.3075@newssvr11.news.prodigy.net>
	<jOrgh.13632$wc5.10963@newssvr25.news.prodigy.net>
	<1168019043.523288.50770@38g2000cwa.googlegroups.com>
	<Kwxnh.57300$qO4.34608@newssvr13.news.prodigy.net>
	<4866bea60701051151v4f7942bj2921b2143a18a092@mail.gmail.com>
Message-ID: <32822fe60701051308g3d64e33fh9b94102cf2862bbc@mail.gmail.com>

On 1/5/07, Chris Mellon <arkanes at gmail.com> wrote:
> I guess this is your opportunity, as someone who thinks that MySQL
> support for Python is important, to assist in maintaining and updating
> those wrappers, right?

believe me I have tried and in this particular case it's very
complicated the main developer knows nothing about windows (by
choise), then you need to buy the MS compiler or patch your python,
after that you need mysql dev, and then you need to practically guess
the compiler flags.


From fredrik at pythonware.com  Thu Jan  4 08:02:59 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 4 Jan 2007 14:02:59 +0100
Subject: Extending Embedded Python and execute external script
References: <1167915019.940396.322390@s34g2000cwa.googlegroups.com>
Message-ID: <enitu4$f0o$1@sea.gmane.org>

"Vertilka" <vertilka at gmail.com> wrote:

> I saw several functions: PyRun_AnyFileExFlags, PyRun_SimpleFileExFlags,
> PyRun_FileExFlags.
>
> Questions:
> 1) Which one should i use in order to achieve what i need ?

PyRun_SimpleFile or PyRun_SimpleString should be good enough.  Using
SimpleString is more robust:

http://effbot.org/pyfaq/pyrun-simplefile-crashes-on-windows-but-not-on-unix-why.htm

and also lets you implement additional glue in Python code instead of in C/C++.

> 2) I couldn't understand the differance betwwen the three ?

AnyFile supports interactive devices, RunFile requires you to provide a custom
execution context.

> 3) What is the difference between the "FILE *fp" and "const char
> *filename" arguments of these functions. If i give a FILE*, why do i
> need to give the file name ?

Python needs the filename to be able to give meaningful error messages.

</F> 





From martin at v.loewis.de  Sun Jan 21 03:38:18 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 21 Jan 2007 09:38:18 +0100
Subject: A solution to the MSVCRT vs MSVCR71 problem?
In-Reply-To: <mailman.2958.1169368253.32031.python-list@python.org>
References: <1169348867.369917.104970@m58g2000cwm.googlegroups.com>
	<mailman.2958.1169368253.32031.python-list@python.org>
Message-ID: <45B3267A.80605@v.loewis.de>

Gabriel Genellina schrieb:
> This would only work, if runtime dll's were compatibles between them,
> and they are not. You can't blindly redirect a call to msvcr71.__xyz to
> msvcr80.__xyz and expect that to work magically - it may have a
> different number of arguments, or different types, or even may not exist
> anymore.

Actually, the libraries *are* binary-compatible (on the ABI level). You
just can't mix two libraries in a single program easily.

> (And what about any symbol exported by ordinal?)

That doesn't happen for msvcrt, as the import library links by name.

Regards,
Martin


From mccredie at gmail.com  Tue Jan  9 09:46:15 2007
From: mccredie at gmail.com (Matimus)
Date: 9 Jan 2007 06:46:15 -0800
Subject: Determine an object is a subclass of another
References: <1168353205.066357.39530@42g2000cwt.googlegroups.com>
Message-ID: <1168353975.285391.212350@m30g2000cwm.googlegroups.com>

First you need to subclass the classes so that Dog actually is a
subclass of Animal which is a subclass of thing...

class Thing:
  pass

class Animal(Thing):
  pass

class Dog(Animal):
  pass

class Weapon(Thing):
  pass

class Gun(Weapon):
  pass

Then you can use 'isinstance'

>>>d = Dog()
>>>isinstance(d,Thing)
True
>>>isinstance(d,Animal)
True
>>>isinstance(d,Weapon)
False
>>>isinstance(d,Gun)
False



From gagsl-py at yahoo.com.ar  Sat Jan 13 08:52:51 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 13 Jan 2007 10:52:51 -0300
Subject: Command line arguments on Vista
References: <1168613362.406648.304720@11g2000cwr.googlegroups.com>
	<Xns98B69A42F81D3duncanbooth@127.0.0.1>
Message-ID: <eoao7i$qf8$1@sea.gmane.org>

"Duncan Booth" <duncan.booth at invalid.invalid> escribi? en el mensaje 
news:Xns98B69A42F81D3duncanbooth at 127.0.0.1...
> It sounds like the registry entry for running Python files is messed up.
> Can you go to a command line and see what the command 'ftype Python.File'
> displays? (Assuming that command lines and ftype still work on Vista)
>
> The output should be:
> Python.File="C:\Python25\python.exe" "%1" %*
>
> but if it only says:
> Python.File="C:\Python25\python.exe" "%1"
>
> then you would get the behaviour you observed (on any version of Windows,
> not just Vista).

That would happen if the association was not made by the Python installer, 
but by the user selecting Python.exe the first time he tried to execute a 
Python script by double-clicking on it.

-- 
Gabriel Genellina 





From paddy3118 at netscape.net  Thu Jan 25 14:03:49 2007
From: paddy3118 at netscape.net (Paddy)
Date: 25 Jan 2007 11:03:49 -0800
Subject: The reliability of python threads
In-Reply-To: <ep9t4g$uf$1@gemini.csx.cam.ac.uk>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
	<ep9t4g$uf$1@gemini.csx.cam.ac.uk>
Message-ID: <1169751828.986583.47200@j27g2000cwj.googlegroups.com>



On Jan 25, 9:26 am, n... at cus.cam.ac.uk (Nick Maclaren) wrote:
> In article <1169675599.502726.5... at a34g2000cwb.googlegroups.com>,"Paddy" <paddy3... at netscape.net> writes:|>
> |> Three to four months before `strange errors`? I'd spend some time
> |> correlating logs; not just for your program, but for everything running
> |> on the server. Then I'd expect to cut my losses and arrange to safely
> |> re-start the program every TWO months.
> |> (I'd arrange the re-start after collecting logs but before their
> |> analysis. Life is too short).
>
> Forget it.  That strategy is fine in general, but is a waste of time
> where threading issues are involved (or signal handling, or some types
> of communication problem, for that matter).

Nah, Its a great strategy. it keeps you up and running when all you
know for sure is that you will most likely be able to keep things
together for three months normally.
The OP only thinks its a threading problem - it doesn't matter what the
true fix will be, as long as arranging to re-start the server well
before its likely to go down doesn't take too long, compared to your
exploration of the problem, and, of course, you have to be able to
afford the glitch in availability.

> There are three unrelated
> killer facts that interact:
>
>     Such failures are usually probabilistic ("Poisson process"), and
> so have no "history".
>
>     The expected number is usually proportional to the square of the
> activity, sometimes a higher power.
>
>     Virtually nothing involved does any routine logging, or even has
> options to log relevant events.
>
> The first means that the strategy of restarting doesn't help.  All
> three mean that current logs are almost never any use.
> 
> Regards,
> Nick Maclaren.



From grante at visi.com  Fri Jan  5 00:40:44 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 05 Jan 2007 05:40:44 -0000
Subject: What is proper way to require a method to be overridden?
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<7.0.1.0.0.20070105004837.05b36d98@yahoo.com.ar>
	<mailman.2308.1167969320.32031.python-list@python.org>
	<12prkb29em82cac@corp.supernews.com>
	<mailman.2309.1167971263.32031.python-list@python.org>
Message-ID: <12prp6sppuqdq17@corp.supernews.com>

On 2007-01-05, Thomas Ploch <Thomas.Ploch at gmx.net> wrote:

>>> I learn so much from this list. I didn't even know this error
>>> existed.
>> 
>> And remember: even if it didn't, you could have created your
>> own:
>
> Erm, it wasn't me who asked. I just wanted to say that I didn't know
> that there is a NotImplementedError.

Sorry, I sort of lost track.  You can still invent your own
Exceptions anyway. ;)  Just don't do what I do and take the
lazy way out:

  raise "method not implemented"

That's considered bad form these days.  

-- 
Grant Edwards
grante at visi.com



From bdesth.quelquechose at free.quelquepart.fr  Mon Jan 29 16:44:37 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 29 Jan 2007 22:44:37 +0100
Subject: List Behavior when inserting new items
In-Reply-To: <1170097845.805992.118870@h3g2000cwc.googlegroups.com>
References: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
	<526ut2F1n2q69U1@mid.uni-berlin.de>
	<1170097845.805992.118870@h3g2000cwc.googlegroups.com>
Message-ID: <45be63e4$0$5953$426a74cc@news.free.fr>

Drew a ?crit :
>>What is your actual usecase?
>>
>>diez
> 
> 
> The issue is that I don't know how long the list will eventually be. 

How is this an issue ? Python's lists are not fixed-sized arrays.

> Essentially I'm trying to use a 2D list to hold lines that I will 
> eventually print to the screen.
 >
> Blank elements in the list will be 
> printed as spaces. I suppose every time I add an element, I could find 
> the difference between the size of the list and the desired index and 
> fill in the range between with " " values,

Yes. But note that [1,2,3,' ',' ',4]
is not the same thing as [1,2,3,,,4] (which is not valid Python FWIW).

> however I just wanted to 
> see if there was a more natural way in the language.

I'm not sure I get it. Do you mean you're trying to use a list of lists 
as a representation of a 2D matrix (IOW, a bitmap) ? Something like

bpm = [
   ['X',' ',' ',' ','X'],
   [' ','X',' ','X',' '],
   [' ',' ','X',' ',' '],
   [' ','X',' ','X',' '],
   ['X',' ',' ',' ','X'],
]

If so, using dicts can be somewhat simpler and less memory-consuming:

d = {1:1, 2:2, 3:3}
d[10] = 4
for i in range(1, max(d.keys())+1):
   print d.get(i, ' ')

That is, instead of storing useless spaces for "blank cells" and having 
to do math to compute how many of them you have to insert/delete, you 
just place stuff at desired indices, and 'fill in' spaces when printing 
out to screen.

HTH


From jarausch at skynet.be  Tue Jan  2 09:13:39 2007
From: jarausch at skynet.be (Helmut Jarausch)
Date: Tue, 02 Jan 2007 15:13:39 +0100
Subject: python2.5 frameobject - how to upgrade?
Message-ID: <459a6894$0$9322$ba620e4c@news.skynet.be>

Hi,

I'd like to install a package ('rekall') which uses
frame->f_nlocals
which is no longer contained in frameobject.h

What's the recommended way to upgrade such an application?

Many thanks for a hint,

Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From robert.kern at gmail.com  Sat Jan 27 16:50:08 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 27 Jan 2007 15:50:08 -0600
Subject: distutils, sdist and tests
In-Reply-To: <Jaudna0fMYmIBCbYnZ2dnUVZ_sKunZ2d@comcast.com>
References: <Jaudna0fMYmIBCbYnZ2dnUVZ_sKunZ2d@comcast.com>
Message-ID: <epgheh$uqs$1@sea.gmane.org>

Steven Bethard wrote:
> How do I get distutils to include my testing module in just the "sdist" 
> distribution?

Use a MANIFEST.

  http://docs.python.org/dist/source-dist.html

> I want test_argparse.py to be available in the source distribution, but 
> I don't think it should be included in the binary distributions.
> 
> Or am I just being to picky?  Do folks normally include their tests in 
> the binary distributions?

Some do, but only when they are packages and can thus hide.the.tests .

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From knipknap at gmail.com  Sun Jan 14 08:49:32 2007
From: knipknap at gmail.com (Samuel)
Date: 14 Jan 2007 05:49:32 -0800
Subject: Announcing: Spiff Guard (Generic Access Lists for Python)
Message-ID: <1168782572.308514.171190@11g2000cwr.googlegroups.com>

Introduction
------------
Spiff Guard is a library for implementing access lists in Python. It
provides a clean and simple API and was implemented with performance
and security in mind. It was originally inspired by phpGACL
(http://phpgacl.sourceforge.net/), but features an API that is
significantly cleaner and easier to use.

Spiff Guard is the first library published as part of the Spiff
platform. The Spiff platform aims to produce a number of generic
libraries generally needed in enterprise (web) applications.

Spiff Guard is free software and distributed under the GNU GPLv2.


Dependencies
-------------
sqlalchemy (http://www.sqlalchemy.org/)


Download
---------
Please check out the code from SVN:

svn checkout http://spiff.googlecode.com/svn/trunk/libs/Guard/


Links:
-------
Spiff project page: http://code.google.com/p/spiff/
Bug tracker: http://code.google.com/p/spiff/issues/list
Documentation: http://spiff.googlecode.com/svn/trunk/libs/Guard/README
Browse the source: http://spiff.googlecode.com/svn/trunk/libs/Guard/

Any questions, please ask (or file a bug).
-Samuel



From skip at pobox.com  Wed Jan 17 09:43:59 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 17 Jan 2007 08:43:59 -0600
Subject: 2.3-2.5 what improved?
In-Reply-To: <45ADFACC.6080807@chamonix.reportlab.co.uk>
References: <45ADFACC.6080807@chamonix.reportlab.co.uk>
Message-ID: <17838.13871.896086.9204@montanaro.dyndns.org>


    Robin> I sort of remember claims being made about 2.5 being 10% faster
    Robin> than 2.4/2.3 etc etc. Can anyone say where the speedups were?

What's New might be enlightening:

    http://www.google.com/search?q=what%27s+new+site%3Apython.org

Skip


From simon.hengel at siemens.com  Thu Jan 25 13:25:59 2007
From: simon.hengel at siemens.com (Hengel, Simon)
Date: Thu, 25 Jan 2007 19:25:59 +0100
Subject: Python for amd64 and x86 on Windows
Message-ID: <FA6F7E8FE294AA4A8647CC128C2579690171C1AC@ERLM862A.ww001.siemens.net>

Hello List,
I need the amd64 and the x86 version of Python installed on one Windows machine. Is there a way to do this? (I think I read about it somewhere, but now I can't find it anymore)

Cheers,
Simon Hengel

Siemens AG
Medical Solutions
CO CHS CS 2
Mozartstr. 57
91052 Erlangen, Germany
Tel.: +49 (9131) 7-24591
mobile: +49 (176) 61 064 074
simon.hengel at siemens.com

Siemens Aktiengesellschaft: Vorsitzender des Aufsichtsrats: Heinrich v. Pierer; 
Vorstand: Klaus Kleinfeld, Vorsitzender; Johannes Feldmayer, Joe Kaeser, 
Rudi Lamprecht, Eduardo Montes, J?rgen Radomski, Erich R. Reinhardt, 
Hermann Requardt, Uriel J. Sharef, Klaus Wucherer
Sitz der Gesellschaft: Berlin und M?nchen
Registergericht: Berlin Charlottenburg, HRB 12300, M?nchen, HRB 6684
WEEE-Reg.-Nr. DE 23691322

From arkanes at gmail.com  Thu Jan 25 14:02:42 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 25 Jan 2007 13:02:42 -0600
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <epasho$rf7$1@sea.gmane.org>
References: <45b6231b$1_2@news.bluewin.ch>
	<4866bea60701230724y3a51bc31p9970075f99b70d05@mail.gmail.com>
	<ep7qoe$jdg$1@sea.gmane.org>
	<4866bea60701240736v837d246w187ecb1ccb90eefd@mail.gmail.com>
	<epa2dh$jl3$1@sea.gmane.org>
	<4866bea60701250609u61e72d30q21dd11c8c8fd9bcd@mail.gmail.com>
	<epasho$rf7$1@sea.gmane.org>
Message-ID: <4866bea60701251102o6af055e1j2d85de2f30b64c64@mail.gmail.com>

On 1/25/07, Boris Borcic <bborcic at gmail.com> wrote:
> Chris Mellon wrote:
> > On 1/25/07, Boris Borcic <bborcic at gmail.com> wrote:
> >> Chris Mellon wrote:
>
> >>>>>
> >>>>> Some quick & dirty wxPython code
> >>>>>
> >>>>> def getTextBitmap(text, font, fgcolor, bgcolor):
> >>>>>     dc = wx.MemoryDC()
> >>>>>     dc.SetFont(font)
> >>>>>     width, height= dc.GetTextExtent(text)
> >>>>>     bmp = wx.EmptyBitmap(width, height)
> >>>>>     dc.SelectObject(bmp)
> >>>>>     dc.SetBackground(wx.Brush(bgcolor))
> >>>>>     dc.Clear()
> >>>>>     dc.SetTextBackground(bgcolor)
> >>>>>     dc.SetTextForeground(fgcolor)
> >>>>>     dc.DrawText(text, 0, 0)
> >>>>>     dc.SelectObject(wx.NullBitmap)
> >>>>>     return bmp
> >>>>>
> >>>>>
> >>>>> Raw win32 code will look similar but will be much more verbose.
> >>>> Thx again for this base.
> >>>>
> >>>> Quickly testing this, it appears that the result is rendered half a pixel off in
> >>>> the x-direction. Does this make sense ? Is it possible to position text with
> >>>> subpixel accuracy ?
> <snip>
> >> In short, wx._gdi_ fights quite hard to enforce what I am trying to avoid :( I
> >> might admire its consistency if it extended to treating both axes similarly...
> >>
> >
> > I have not recently had a need to examine drawn text output this
> > closely, but I am familiar with the C++ code that implements the
> > drawing and it's a direct wrapping of win32 GDI calls. If it's not
> > matching your source text, then the source may be drawn using a
> > different method or using one of the alternate engines, like GDI+.
>
> Maybe. In any case, color separation solves my (sub)problem : the blue layer
> from the wx generated model matches the green layer from the app's window, pixel
> for pixel (at least with antialiasing and cleartype on, while writing black on
> white).
>

That's... extremely interesting. If it works for you, go for it! If
you're interested in some other things to try, wx.EmptyBitmap takes a
depth parameter you can use to eliminate color.


From ziga.seilnacht at gmail.com  Fri Jan 26 06:00:23 2007
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 26 Jan 2007 03:00:23 -0800
Subject: xml.dom.minidom.parseString segmentation fault on mod_python
In-Reply-To: <1169804514.862290.274940@q2g2000cwa.googlegroups.com>
References: <1169804514.862290.274940@q2g2000cwa.googlegroups.com>
Message-ID: <1169809222.955833.176380@j27g2000cwj.googlegroups.com>



On Jan 26, 10:41 am, qert... at gmail.com wrote:
> Python 2.4.4
> mod_python 3.2.10  +  Apache 2.0
>
> def index( req, **params ):
>     from xml.dom.minidom import parseString
>     doc = parseString( "whatever" )
>
> => blank screen, _no_any_exception_; Apache error_log:
> [Fri Jan 26 10:18:48 2007] [notice] child pid 17596 exit signal
> Segmentation fault (11)
>
> Outside mod_python code works well. Any ideas? I would be grateful.

http://www.python.org/sf/1558223
http://www.python.org/sf/1295808
http://www.python.org/sf/1075984

Try to compile all your dependencies against the same version of
Expat or upgrade to python 2.5.

Ziga



From grahn+nntp at snipabacken.dyndns.org  Thu Jan 18 08:05:20 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 18 Jan 2007 13:05:20 GMT
Subject: How can I create a linked list in Python?
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<1168983652.192715.235580@a75g2000cwd.googlegroups.com>
	<pan.2007.01.17.09.11.39.502517@gmx.net>
Message-ID: <slrnequo3m.tcj.grahn+nntp@frailea.sa.invalid>

On Wed, 17 Jan 2007 10:11:40 +0100, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> In <1168983652.192715.235580 at a75g2000cwd.googlegroups.com>, bearophileHUGS
> wrote:
>
>> In CPython they are dynamic arrays, they aren't lists. Try adding
>> elements at the beginning of a list compared to adding elements at the
>> beginning or in the middle of a python "list" and you will see the
>> efficiency differences.
>
> Python has a list type without the "s, it's a real list.  Don't confuse
> the *ADT list* with *linked lists* which are just one implementation of
> the ADT list.

I think the terminology is already so confused that you cannot say "list"
unless context implies that you mean e.g. a Python list. For example, SML (a
language favored by people interested in types and type systems) uses the
term "list", but a SML "list" really acts like a stack.

FWIW, I oppose the idea (paraphrased from further up the thread) that linked
lists and other data structures are obsolete and dying concepts, obsoleted
by Python and other modern languages.

99% of the time. a Python list is the right tool for the job, but that's
only because we have CPU cycles to spare and the 'n' in our 'O(n)' is
limited. You cannot call yourself a computer scientist without understanding
things like linked lists.  No other data structure has the same
characteristics (good and bad) as that one. Or those two, really.

I mean, what would Knuth say? ;-)

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From ggrp1.20.martineau at dfgh.net  Wed Jan 24 18:19:29 2007
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 24 Jan 2007 15:19:29 -0800
Subject: New os.path.exists() behavior - bug or feature?
In-Reply-To: <1166401777.533652.208840@n67g2000cwd.googlegroups.com>
References: <1166401777.533652.208840@n67g2000cwd.googlegroups.com>
Message-ID: <1169680769.297818.189930@v45g2000cwv.googlegroups.com>

FWIW, your code works correctly for me in all respects with Python 2.5
on Windows XP Pro.
I no longer have Python 2.4.x installed, so can't easily do a
comparison.

Perhaps the problem has something to do with Python 2.5 with Windows
2K.

-Martin


On Dec 17 2006, 4:29 pm, "klappnase" <klappn... at web.de> wrote:
> Hi all,
> yesterday I installed Python-2.5 and python-2.4.4 on my windows2k box.
> When trying to use os.path.exists() to detect which drives are present
> on the system I noticed that
> these behave differently:
>
> Python 2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)]
> on win32
> Type "copyright", "credits" or "license()" for more information.
>
> >>> import os
> >>> for char in 'ABCDEFGHIJKLMNOPQRSTUVWXYZ':        if os.path.exists('%s:\\' % char):
>                 print '%s:\\' % char
>
> A:\
> C:\
> D:\
> E:\
>
> ###########################################
>
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "copyright", "credits" or "license()" for more information.
>
> >>> import os
> >>> for char in 'ABCDEFGHIJKLMNOPQRSTUVWXYZ':        if os.path.exists('%s:\\' % char):
>                 print '%s:\\' % char
>
> C:\
>
> When I insert a floppy into A: os.path.exists('A:\\') will return True
> on Python-2.5, too.
> Does anyone know, is this inconsistent behavior a bug or a new feature?
>
> I also noticed that theTixbinaries are no longer present in 2.5, does
> anyone know if it is
> planned to remove them pemanently?
> 
> Thanks in advance
> 
> Michael



From martin at v.loewis.de  Wed Jan  3 10:40:53 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 03 Jan 2007 16:40:53 +0100
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167757721.883547.70530@42g2000cwt.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
	<mailman.2211.1167756187.32031.python-list@python.org>
	<1167757721.883547.70530@42g2000cwt.googlegroups.com>
Message-ID: <459BCE85.5070707@v.loewis.de>

Ben Sizer schrieb:
> Firstly, that solution only works for actual Python scripts; it doesn't
> solve the utility scripts that are often installed to the /scripts
> directory.

Those packages should install .bat files into /scripts on Windows.

> It's a shame that many responses on this thread don't
> address that half of the issue. Am I the only person who installs
> packages that add scripts (not all of which are Python ones)?

Perhaps not. However, people apparently disagree what the "full issue"
is. If you have non-Python scripts (eg. VBScript) in /scripts, how will
having python.exe on PATH help at all?

>> Unfortunately the Python installer is not an InnoSetup installer.
> 
> The page I linked to is a bit misleading but there is an executable on
> that page. All you then have to do is invoke it with the relevant
> parameter.

Please submit a patch that does so, then. Make sure you add user
interface to make it an option.

These things are *not* easy, and claiming that they are is
misleading.

Regards,
Martin


From mirandacascade at yahoo.com  Sun Jan  7 16:23:29 2007
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 7 Jan 2007 13:23:29 -0800
Subject: AES256 in PyCrypto
References: <1168134542.337448.261510@s34g2000cwa.googlegroups.com>
	<pan.2007.01.07.10.30.53.653351@gmx.net>
	<1168184060.548851.11540@i15g2000cwa.googlegroups.com>
	<enrdah$k40$02$1@news.t-online.com>
Message-ID: <1168205009.554907.181120@v33g2000cwv.googlegroups.com>

Sebastian 'lunar' Wiesner wrote:

> Since you are apparently unable to read to docstrings of this module, I
> will give you a short hint: yes, pycrypto supports AES with 256 bit
> keys.
Thank you for the information.

The material I consulted was:
a) the PyCrypto manual: http://www.amk.ca/python/writing/pycrypt/
b) the .py files that shipped with the PyCrypto package

Is a docstring is the text between the three consecutive quote
characters in a .py file?  The reason for the question is that I looked
at the .py files that shipped with PyCrypto.  Of the various .py files
that shipped with PyCrypto, there were two files (both __init__.py)
that contained information seemed to pertain to AES.  The stuff between
the 3 consecutive quote chars in:
  Crypto.__init__.py
  Crypto.Cipher.__init__.py
make reference to AES, but I wasn't able to determine from what I read
if that was AES256.
Which .py file contain the docstrings that flesh out the information
summarized in the short hint?

Can docstrings be embedded within the .pyd extension modules as well?
Does the AES.pyd extension module have docstrings?  How does one view
the docstrings in a .pyd file?  When I reference AES from the
interactive of Pythonwin:
>>> from Crypto.Cipher import AES
>>> x = AES.new(
As soon as I type the '(' character, the IDE displays:
new(key, [mode], [IV]): Return a new AES encryption object

then when x gets instantiated, and the encrypt method gets called...
>>> x.encrypt(
As soon as I type the '(' character, the IDE displays:
Encrypt the provided string of binary data

I'm guessing that what the IDE is displaying is the first line of what
may be multiple-line docstring that is embedded within the .pyd
extension module?  Might there be more lines in the docstring?

Thank you.



From bearophileHUGS at lycos.com  Tue Jan 16 12:24:45 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 16 Jan 2007 09:24:45 -0800
Subject: A note on heapq module
Message-ID: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>

In few minutes I have just written this quite raw class, it lacks
doctring (the same of the functions of the heapq module), it may
contain bugs still, I haven't tested it much. It's just a simple
wrapper around some of the functions of the heapq module (nsmallest and
nlargest are missing). Usually I use classes only when I need then, I
like functional programming enough, and this class seems to just slow
down the functions of the heapq module. But I think an improved class
similar to this one may be useful (added, replacing isn't necessary)
into the heapq module, because it can avoid cetain errors: I know what
Heaps are and how they work, but some time ago I have written a bug
into small program that uses the functions of the heapq module, because
I have added an item to the head of the heap using a normal list
method, breaking the heap invariant. With a simple class like this one
all the methods of your object keep the heap invariant, avoiding that
kind of bugs. (If you are interested I can improve this class some,
it't not difficult.)


from heapq import heapify, heappush, heappop, heapreplace

class Heap(object):
    def __init__(self, init=None):
        if init is None:
            self.h = []
        elif isinstance(init, Heap):
            self.h = init.h[:]
        else:
            self.h = list(init)
            heapify(self.h)
    def smallest(self):
        return self.h[0]
    def sort(self, cmp=None, key=None):
        self.h.sort(cmp=cmp, key=key)
    def heappush(self, item):
        heappush(self.h, item)
    def heappop(self):
        return heappop(self.h)
    def heapreplace(self, item):
        return heapreplace(self.h, item)
    def clear(self):
        del self.h[:]
    def __contains__(self, item):
        return item in self.h
    def __hash__(self):
        raise TypeError("Heap objects are unhashable.")
    def __iter__(self):
        return self.h.__iter__()
    def __eq__(self, other):
        return isinstance(other, Heap) and self.h == other.h
    def __ne__(self, other):
        return not isinstance(other, Heap) or self.h != other.h
    def __len__(self):
        return len(self.h)
    def __nonzero__(self):
        return bool(self.h)
    def __str__(self):
        return str(self.h)
    def __repr__(self):
        return "Heap(%s)" % self.h if self.h else "Heap()"

Bye,
bearophile



From rschroev_nospam_ml at fastmail.fm  Fri Jan 12 15:27:47 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Fri, 12 Jan 2007 20:27:47 GMT
Subject: Newbie imap lib question
In-Reply-To: <1168611888.009894.271190@51g2000cwl.googlegroups.com>
References: <1168611888.009894.271190@51g2000cwl.googlegroups.com>
Message-ID: <7bSph.287183$Tz5.5784715@phobos.telenet-ops.be>

jrpfinch schreef:
> I have three messages in my inbox.  Why does messageCount =
> gServer.select('INBOX') not just return OK and 3.  See below for
> examples - seems to be completely random how many threes it returns.
> The documentation for imaplib seems sparse.  Does anybody have any good
> links?  Many thanks, Jon
> 
> messageCount =
>  0 : OK
>  1 : ['3']
> messageCount =
>  0 : OK
>  1 : ['3', '3', '3']
> messageCount =
>  0 : OK
>  1 : [None]
> messageCount =
>  0 : OK
>  1 : ['3', '3']

I'm afraid I can't help you: all I can say is that it works for my. It 
gives consistent results each time I run it.

 >>> import imaplib
 >>> M = imaplib.IMAP4('...')
 >>> M.login('...', '...')
('OK', ['User logged in'])
 >>> M.select('INBOX')
('OK', ['740'])

Always the same. Though the number changes if I receive or delete mail 
of course.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From gagsl-py at yahoo.com.ar  Thu Jan 11 02:16:23 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 04:16:23 -0300
Subject: Joining threads but allowing signals to main thread?
In-Reply-To: <87irfeawrj.fsf@asfast.com>
References: <87irfeawrj.fsf@asfast.com>
Message-ID: <7.0.1.0.0.20070111040620.058d6cc0@yahoo.com.ar>

At Thursday 11/1/2007 03:43, Lloyd Zusman wrote:

>   while threading.activeCount() > 1:
>       time.sleep(0.001)
>
>   sys.exit(0)
>
>Is there any way to allow my program to respond to signals without
>having to busy-wait in the main thread?

Don't worry too much, this is *not* a busy wait, because you use 
sleep. You can use a longer sleep, it will be terminated by any 
signal. But not too long, or the check for activeCount() will be 
delayed in excess. (I use sleep(1) usually but your needs may be different)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From kay.schluehr at gmx.net  Mon Jan  1 12:48:15 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 1 Jan 2007 09:48:15 -0800
Subject: PEP 3107 Function Annotations for review and comment
In-Reply-To: <mailman.2176.1167579699.32031.python-list@python.org>
References: <mailman.2136.1167434877.32031.python-list@python.org>
	<1167568000.728842.170160@48g2000cwx.googlegroups.com>
	<mailman.2176.1167579699.32031.python-list@python.org>
Message-ID: <1167673695.249834.40100@a3g2000cwd.googlegroups.com>

Tony Lownds wrote:
> On Dec 31, 2006, at 4:26 AM, Kay Schluehr wrote:
>
> > I have two questions:
> >
> > 1) I don't understand the clause ('*' [tname] (',' tname ['=' test])*
> > in the grammar rule of typedargslist. Does it stem from another PEP?
> >
>
> Yes, PEP 3102 Keyword-only Arguments.
>
> > 2) Is the func_annotation information for def foo(*c: list)
> > stored as {"*c": list} preserving optional argument information or
> > {"c":list} ?
> >
>
> {"c": list}
>
> -Tony

Good. There is still one issue. I understand that you don't want to fix
the semantics of function annotations but to be usefull some
annotations are needed to express function types. Using those
consistently with the notation of the enhanced function statement I
suggest introducing an arrow expression and an __arrow__ special
function:

expr: arrow_expr ('->' arrow_expr)*
arrow_expr: xor_expr ('|' xor_expr)*
...

class Algebraic(type):
    '''
    Metaclass used to enable operations on classes or subclasses
    '''
    def __init__(cls, name, bases, dict):
        super(Algebraic, cls).__init__(name, bases, dict)

    def __arrow__(cls, codom):
        fntype = Function(*cls.dom)
        fntype.codom = codom
        return fntype

def Function(*domains):
     "Function type generator"
    class FunType:
        __metaclass__ = Algebraic
        dom = domains
        codom = ()
    return FunType

maptype = Function( Function(object)->object, list) -> list



From webmaster at cacradicalgrace.org  Mon Jan 22 15:13:02 2007
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Mon, 22 Jan 2007 13:13:02 -0700
Subject: Does eval has the same features as Perl's?
References: <mailman.2937.1169285428.32031.python-list@python.org>
Message-ID: <ep35tj$2f0$1@aioe.org>

The python editor won't "get exit."  It will raise an exception.  With
or without an eval, you can catch the exception.

try:
    x = 1/0
except ZeroDivisionError:
    x = "infinity"


Jm lists wrote:
> Hello members,
> 
> I want to know does the "eval" in python have the same features as in
> Perl (capture errors)?
> 
> For example,in perl I can wrote:
> 
> $re = eval { 1 / 0 };
> 
> Though 1/0 is a fatal error but since it's in "eval" block so the perl
> interpreter doesn't get exit.
> 
> Thanks again.


From duncan.booth at invalid.invalid  Fri Jan 26 13:13:56 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 26 Jan 2007 18:13:56 GMT
Subject: Fixed length lists from .split()?
References: <2007012611072716807-bob@passcalnmtedu>
Message-ID: <Xns98C4B9784784Eduncanbooth@127.0.0.1>

Bob Greschke <bob at passcal.nmt.edu> wrote:

> Is there a fancy way to get Parts=Line.split(";") to make Parts always 
> have three items in it, or do I just have to check the length of Parts 
> and loop to add the required missing items (this one would just take 
> Parts+=[""], but there are other types of lines in the file that have 
> about 10 "fields" that also have this problem)?

>>> def nsplit(s, sep, n):
	return (s.split(sep) + [""]*n)[:n]

>>> nsplit("bcsn; 1000001; 1456", ";", 3)
['bcsn', ' 1000001', ' 1456']
>>> nsplit("bcsn; 1000001", ";", 3)
['bcsn', ' 1000001', '']
>>> 


From michael at mustun.ch  Sun Jan  7 16:23:22 2007
From: michael at mustun.ch (Michael M.)
Date: Sun, 07 Jan 2007 22:23:22 +0100
Subject: how to find the longst element list of lists
Message-ID: <Vwdoh.223$L06.180@nntpserver.swip.net>

How to find the longst element list of lists?

I think, there should be an easier way then this:

   s1 = ["q", "e", "d"]
   s2 = ["a", "b"]
   s3 = ["a", "b", "c", "d"]

   if len(s1) >= len(s2) and len(s1) >= len(s3):
     sx1=s1  ## s1 ist l?ngster
     if len(s2) >= len(s3):
       sx2=s2
       sx3=s3
     else:
       sx2=s3
       sx3=s2

   if len(s2) >= len(s3) and len(s2) >= len(s1):
     sx1=s2  ## s2 ist l?ngster
     if len(s3) >= len(s1):
       sx2=s3
       sx3=s1
     else:
       sx2=s1
       sx3=s3

   if len(s3) >= len(s1) and len(s3) >= len(s2):
     sx1=s3  ## s3 ist l?ngster
     if len(s1) >= len(s2):
       sx2=s1
       sx3=s2
     else:
       sx2=s2
       sx3=s1

After, the list ist sorted:

   sx1 = ["a", "b", "c", "d"]
   sx2 = ["q", "e", "d"]
   sx3 = ["a", "b"]



From aboudouvas at panafonet.gr  Fri Jan  5 10:36:56 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 5 Jan 2007 07:36:56 -0800
Subject: program deployment
In-Reply-To: <12psqqk75ij5ta5@corp.supernews.com>
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<12psqqk75ij5ta5@corp.supernews.com>
Message-ID: <1168011416.291950.286500@s80g2000cwa.googlegroups.com>

> Under Windows, I ususally use py2exe+inno-setup.

Xmmm...i have downloaded this and try a (very) simple project and it is
working great.
Of your experience, does it also working great when you have more
complex solutions,
e.x. many 3rd party modules like wxWidgets and so ??



From nmm1 at cus.cam.ac.uk  Wed Jan 10 04:36:53 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 10 Jan 2007 09:36:53 GMT
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
	<envur1$rq1$1@gemini.csx.cam.ac.uk>
	<mailman.2480.1168350033.32031.python-list@python.org>
	<Xns98B384E126F4Ctim111one@216.196.97.136>
	<eo0mjf$i4h$1@gemini.csx.cam.ac.uk>
	<Xns98B3A00749D6tim111one@216.196.97.136>
Message-ID: <eo2c3l$5v2$1@gemini.csx.cam.ac.uk>


In article <Xns98B3A00749D6tim111one at 216.196.97.136>,
Tim Peters <tim.one at comcast.net> writes:
|> 
|> Huh.  I don't read it that way.  If it said "numbers can be ..." I 
|> might, but reading that way seems to requires effort to overlook the 
|> "decimal" in "decimal numbers can be ...".

I wouldn't expect YOU to read it that way, but I can assure you from
experience that many people do.  What it MEANS is "Numbers with a
short representation in decimal can be represented exactly in decimal
arithmetic", which is tautologous.  What they READ it to mean is
"One advantage of representing numbers in decimal is that they can be
represented exactly", and they then assume that also applies to pi,
sqrt(2), 1/3 ....

The point is that the "decimal" could apply equally well to the external
or internal representation and, if you aren't fairly clued-up in this
area, it is easy to choose the wrong one.

|> >|>> and how is decimal no better than binary?
|>  
|> >|> Basically, they both lose info when rounding does occur.  For
|> >|> example, 
|> 
|> > Yes, but there are two ways in which binary is superior.  Let's skip
|> > the superior 'smoothness', as being too arcane an issue for this
|> > group,
|> 
|> With 28 decimal digits used by default, few apps would care about this 
|> anyway.

Were you in the computer arithmetic area during the "base wars" of the
1960s and 1970s that culminated with binary winning out?  A lot of very
well-respected numerical analysts said that larger bases led to a
faster build-up of error (independent of the precision).  My limited
investigations indicated that there was SOME truth in that, but it
wasn't a major matter; I never say the matter settled definitively.

|> > and deal with the other.  In binary, calculating the mid-point
|> > of two numbers (a very common operation) is guaranteed to be within
|> > the range defined by those numbers, or to over/under-flow.
|> >
|> > Neither (x+y)/2.0 nor (x/2.0+y/2.0) are necessarily within the range
|> > (x,y) in decimal, even for the most respectable values of x and y.
|> > This was a MAJOR "gotcha" in the days before binary became standard,
|> > and will clearly return with decimal.
|> 
|> I view this as being an instance of "lose info when rounding does 
|> occur".  For example,

No, absolutely NOT!   This is an orthogonal matter, and is about the
loss of an important invariant when using any base above 2.

Back in the days when there were multiple bases, virtually every
programmer who wrote large numerical code got caught by it at least
once, and many got caught several times (it has multiple guises).
For example, take the following algorithm for binary chop:

while 1 :
    c = (a+b)/2
    if f(x) < y :
        if c == b :
            break
        b = c
    else :
        if c == a :
            break
        a = c

That works in binary, but in no base above 2 (assuming that I haven't
made a stupid error writing it down).  In THAT case, it is easy to fix
for decimal, but there are ways that it can show up that can be quite
tricky to fix.


Regards,
Nick Maclaren.


From rganesan at myrealbox.com  Fri Jan 12 05:10:13 2007
From: rganesan at myrealbox.com (Ganesan Rajagopal)
Date: Fri, 12 Jan 2007 15:40:13 +0530
Subject: maximum number of threads
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl>
	<mailman.2522.1168423062.32031.python-list@python.org>
	<mailman.2528.1168429308.32031.python-list@python.org>
	<eo2rl6$41s$1@upsn250.cri.u-psud.fr>
	<c2701f5c0701100611u69732112v8b5e4782d0944ba@mail.gmail.com>
Message-ID: <xkvh4pqwsghm.fsf@grajagop-lnx.cisco.com>

>>>>> Felipe Almeida Lessa <felipe.lessa at gmail.com> writes:
>> 
>> to modify the maximum number of user process (AFAIK each thread use a
>> process entry on Linux)

> I don't think it's only this.

It isn't that at all. The default Linux POSIX threads stack size is
8MB. Linux user space is 3GB (Kernel is mapped at upper 1GB). 

382 * 8 = 3056MB.

Basically, you're running out of address space. I don't know if you have any
control at python level. In C you can call pthread_attr_setstacksize(). 

Ganesan

-- 
Ganesan Rajagopal



From contact at hidden-master.yahoo.com  Sun Jan 14 00:57:59 2007
From: contact at hidden-master.yahoo.com (Phloyd Bird)
Date: Sun, 14 Jan 2007 05:57:59 GMT
Subject: Sexy Vidz
Message-ID: <HDjqh.655695$R63.490674@pd7urf1no>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070114/2f5e10f4/attachment.html>

From nick at craig-wood.com  Tue Jan 23 13:30:08 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 23 Jan 2007 12:30:08 -0600
Subject: How to use time.clock() function in python
References: <1169503516.425217.218790@q2g2000cwa.googlegroups.com>
Message-ID: <slrnerci21.jp4.nick@irishsea.home.craig-wood.com>

yinglcs at gmail.com <yinglcs at gmail.com> wrote:
>  I am following this python example trying to time how long does an
>  operation takes, like this:
> 
>  My question is why the content of the file (dataFile) is just '0.0'?
>  I have tried "print >>dataFile, timeTaken" or "print >>dataFile,str(
>  timeTaken)", but gives me 0.0.
>  Please tell me what am I missing?
> 
> 
>          t1 = time.clock()
>          os.system(cmd)
> 
>          outputFile = str(i) + ".png"
> 
>          t2 = time.clock()
> 
>          timeTaken = t2 - t1
>          allTimeTaken += timeTaken
>          print >>dataFile, timeTaken

Under unix, time.clock() measures CPU time used by the current
process.  os.system() will consume almost zero CPU while it waits for
the command you ran to finish.

You probably want time.time(), eg

  >>> from time import clock, time
  >>> print clock(), time()
  0.01 1169573460.96
  >>> print clock(), time()
  0.01 1169573463.76
  >>> print clock(), time()
  0.01 1169573467.09
  >>> 

However running the same under windows you get a quite different
result :-

  >>> from time import clock, time
  >>> print clock(), time()
  7.54285810068e-006 1169574534.84
  >>> print clock(), time()
  3.32073322168 1169574538.16
  >>> print clock(), time()
  7.32428004118 1169574542.15
  >>>

In windows clock() counts in real time and at much higher resolution
than time().

Under windows time() counts in 1ms steps wheras it usually counts in
1us steps under linux.

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


From gagsl-py at yahoo.com.ar  Fri Jan 19 14:27:46 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 16:27:46 -0300
Subject: when format strings attack
In-Reply-To: <1169232233.469572.298320@a75g2000cwd.googlegroups.com>
References: <1169207467.989977.162940@q2g2000cwa.googlegroups.com>
	<mailman.2908.1169221530.32031.python-list@python.org>
	<1169232233.469572.298320@a75g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20070119162249.043e8cd8@yahoo.com.ar>

At Friday 19/1/2007 15:43, John Zenger wrote:

>Perhaps it is not as severe a security risk, but pure Python programs
>can run into similar problems if they don't check user input for %
>codes.  Example:
>
> >>> k = raw_input("Try to trick me: ")
>Try to trick me: How about %s this?
> >>> j = "User %s just entered: " + k
> >>> print j % "John"
>Traceback (most recent call last):
>   File "<pyshell#8>", line 1, in ?
>     print j % "John"
>TypeError: not enough arguments for format string

That's not a problem, it's an exception. *This* is a problem: 
printf("Hello, %s")


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From wilder.usenet at gmail.com  Thu Jan 11 17:24:04 2007
From: wilder.usenet at gmail.com (J)
Date: 11 Jan 2007 14:24:04 -0800
Subject: Matching Directory Names and Grouping Them
Message-ID: <1168554244.459131.190440@k58g2000hse.googlegroups.com>

Hello Group-

I have limited programming experience, but I'm looking for a generic
way to search through a root directory for subdirectories with similar
names, organize and group them by matching their subdirectory path, and
then output their full paths into a text file. For example, the
contents of the output text file may look like this:

<root>\Input1\2001\01\
<root>\Input2\2001\01\
<root>\Input3\2001\01\

<root>\Input1\2002\03\
<root>\Input2\2002\03\
<root>\Input3\2002\03\

<root>\Input2\2005\05\
<root>\Input3\2005\05\

<root>\Input1\2005\12\
<root>\Input3\2005\12\

I tried working with python regular expressions, but so far haven't
found code that can do the trick. Any help would be greatly
appreciated. Thanks!


J.



From dimitri.pater at gmail.com  Wed Jan 24 19:15:56 2007
From: dimitri.pater at gmail.com (dimitri pater)
Date: Thu, 25 Jan 2007 01:15:56 +0100
Subject: matplotlib button problem
In-Reply-To: <1169674642.577269.88950@l53g2000cwa.googlegroups.com>
References: <1169674642.577269.88950@l53g2000cwa.googlegroups.com>
Message-ID: <e75321bd0701241615l17bb2a25k8340b0ecdb31ea32@mail.gmail.com>

Hi,
post your question on matplotlib-users at lists.sourceforge.net

regards,
Dimitri

On 24 Jan 2007 13:37:22 -0800, Zielinski <jerzy.zielinski at gmail.com> wrote:
>
> Hi,
>
> Recently I started to use matplotlib with python. Now I would like to
> have interaction with my plots. Here is the problem:
>
> I have a long vector of data, to long to display it on one picture,
> because of, well you know to much data to big mess... so I decided to
> extract some data from long_vector to short_vector with 100 elements.
> So I have:
>    data_position = 1
>    interval = 100
>    for i in range (0, interval):
>       short_vector[i] = long_vector[data_position*interval + i]
>
> Then I plot it. works fine...
> Now I created a button "next" I would like to press it and change the
> data_position to +1 every time i press it, of course, and redraw the
> picture. It can be a key on the keyboard, I don't care.
>
> Bottom line: how to change the global variable with the button in
> matplotlib, and redraw a picture using this variable
>
> Thanks for help
> Jerzy
> jerzy.zielinski at gmail.com
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070125/74ea6fc9/attachment.html>

From carsten at uniqsys.com  Fri Jan 12 09:14:59 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 12 Jan 2007 09:14:59 -0500
Subject: Rational Numbers
In-Reply-To: <eo6ia5$5bt$1@gemini.csx.cam.ac.uk>
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<mailman.2597.1168550439.32031.python-list@python.org>
	<eo6ia5$5bt$1@gemini.csx.cam.ac.uk>
Message-ID: <1168611299.3382.36.camel@dot.uniqsys.com>

On Thu, 2007-01-11 at 23:47 +0000, Nick Maclaren wrote:
> In article <mailman.2597.1168550439.32031.python-list at python.org>,
> Facundo Batista <facundo at taniquetil.com.ar> writes:
> |> Noud Aldenhoven wrote:
> |> 
> |> > When I was programming in a mathematical project I began to wonder if python
> |> > supports rational numbers[1]. In a language like magma[2] it's not such a
> |> > problem. Does python supports something simular?
> |> 
> |> Python does not have rational numbers.
> |> 
> |> There's a (rejected) PEP about this, PEP-239:
> |> 
> |>   http://www.python.org/dev/peps/pep-0239/
> |> 
> |> Maybe you also want to read the section "Why not rational?" of
> |> PEP-327...
> |> 
> |>   http://www.python.org/dev/peps/pep-0327/#why-not-rational
> 
> Oh, God.  Decimal delusions again :-(
> 
> There are good arguments for not having a rational type, but the idea
> that decimal floating-point is in any way a replacement is cuckoo.

You're putting words in Facundo's mouth. Facundo didn't say why we
should read that section of PEP 327. I think he merely pointed to the
slow performance of rational numbers that's explained in that section.
(Facundo is the author of PEP 327, so I find it unlikely that he has
delusions about what decimals can and can't do.)

It is true that decimal arithmetic is not a replacement for rational
arithmetic, but I don't see anybody on this thread or in PEP 327 stating
that it is.

-Carsten




From horpner at yahoo.com  Thu Jan 18 13:03:41 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 18 Jan 2007 18:03:41 GMT
Subject: Traversing the properties of a Class
References: <1169141253.332211.12790@38g2000cwa.googlegroups.com>
Message-ID: <slrneqvgtv.r0.horpner@FIAD06.norwich.edu>

On 2007-01-18, EdG <edquichan at yahoo.com> wrote:
> For debugging purposes, I would like to traverse the class
> listing out all the properties.

This is the first thing that came to mind.

def show_properties(cls):
  for attr in dir(cls):
    if isinstance(getattr(cls, attr), property):
      print attr

-- 
Neil Cerutti

-- 
Posted via a free Usenet account from http://www.teranews.com



From emin.shopper at gmail.com  Fri Jan 12 09:10:39 2007
From: emin.shopper at gmail.com (Emin)
Date: 12 Jan 2007 06:10:39 -0800
Subject: How much slower is dict indexing vs. list indexing?
In-Reply-To: <mailman.2606.1168556128.32031.python-list@python.org>
References: <1168555253.601611.258600@k58g2000hse.googlegroups.com>
	<mailman.2606.1168556128.32031.python-list@python.org>
Message-ID: <1168611039.720278.13430@s34g2000cwa.googlegroups.com>

On Jan 11, 5:53 pm, Steve Holden <s... at holdenweb.com> wrote:
>
> What technique were you thinking of to look up the cached index values
> in Python, just as a matter of curiosity? Storing them in a dict? It
> would be hard to think of a faster way ... ;-)

I didn't have anything fancy in mind. I was just wondering whether it
makes sense to replace a block of code like

data = {'a' : 1, 'b' :2, 'c' : 3}
for i in someLargeList:
   for name in ['a','b','c']:
      result.append(data[name])

with somthing like

data = {'a' : 1, 'b' :2, 'c' : 3}
dataValues = [data[k] for k in ['a','b','c']
for i in someLargeList:
   for index in [0,1,2]:
      result.append(dataValues[index])

It sounds like it's probably not worth the effort in general, but might
be for extremely ultra-critical parts of code.

Thanks



From ptwobrussell at gmail.com  Sun Jan 14 12:10:24 2007
From: ptwobrussell at gmail.com (MR)
Date: 14 Jan 2007 09:10:24 -0800
Subject: Decorators inside of class and decorator parameters
In-Reply-To: <1168763727.677028.149640@51g2000cwl.googlegroups.com>
References: <1168728983.541526.202320@l53g2000cwa.googlegroups.com>
	<mailman.2703.1168747644.32031.python-list@python.org>
	<1168763727.677028.149640@51g2000cwl.googlegroups.com>
Message-ID: <1168794623.987118.182460@51g2000cwl.googlegroups.com>

Wow. Really neat stuff there. memoize seems especially cool since you
can get lots of nice dynamic programming benefits "for free" (sorry if
I just stated the obvious, but I thought was was especially cool.)


Michele Simionato wrote:
> Gabriel Genellina wrote:
> > see this article by M. Simoniato
> > http://www.phyast.pitt.edu/~micheles/python/documentation.html for a better
> > way using its decorator factory.
>
> Actually the name is Simionato ;)
> I have just released version 2.0, the new thing is an update_wrapper
> function similar to the one
> in the standard library, but with the ability to preserve the signature
> on demand. For instance
>
> def traced(func):
>    def wrapper(*args, **kw):
>        print 'calling %s with args %s, %s' % (func, args, kw)
>        return func(*args, **kw)
>   return update_wrapper(wrapper, func, create=False)
>
> works exactly as functools.update_wrapper (i.e. copies__doc__,
> __module__,etc. from func to wrapper without
> preserving the signature), whereas update_wrapper(wrapper, func,
> create=True) creates a new wrapper
> with the right signature before copying the attributes.
> 
>  Michele Simionato



From steve at holdenweb.com  Sun Jan 28 04:59:45 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 28 Jan 2007 09:59:45 +0000
Subject: More Python screencasts (Google videos)
In-Reply-To: <1169959174.477911.105890@k78g2000cwa.googlegroups.com>
References: <1169959174.477911.105890@k78g2000cwa.googlegroups.com>
Message-ID: <ephs6h$srk$1@sea.gmane.org>

kirby.urner at gmail.com wrote:
> Here're three sample 3-6 min videos showing off Python to math 
> teachers
> thinking about using a computer language instead of just calculators:
> 
> http://controlroom.blogspot.com/2007/01/python-for-math-teachers.html
> 
> Higher resolution versions are available to teachers enrolling in our 
> program.
> 
> Kirby
> 
Kirby:

Have you seen what can be done with Crunchy? That's a neat way to 
present interactive Python content with surrounding pedagogical information.

See you at PyCon?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From evan at binarymanipulations.com  Tue Jan  2 05:44:57 2007
From: evan at binarymanipulations.com (Evan Carmi)
Date: Tue, 2 Jan 2007 10:44:57 +0000 (UTC)
Subject: how to move files based on file-ending from dirs and
	=?utf-8?b?c3ViZGlycwl0bwlzcGVjaWZpYw==?= dir?
References: <mailman.2194.1167722106.32031.python-list@python.org>
	<pan.2007.01.02.08.08.03.707994@gmx.net>
Message-ID: <loom.20070102T114204-531@post.gmane.org>

Marc 'BlackJack' Rintsch <bj_666 <at> gmx.net> writes:

> This line is quite complicated and I don't really grasp what it's doing.
> Maybe some comments, possible with examples, are needed here.  And maybe
> then you'll see why it doesn't work as wanted!?  If these are the
> destination paths and they should be at the same level as `top`, where is
> `top` here?  Shouldn't that be a prefix of all destination paths?
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch

I figured out the problem, with a lot of help. 
Thanks for the help
Evan




From tmaroff at yahoo.com  Wed Jan 10 21:24:54 2007
From: tmaroff at yahoo.com (Tristan)
Date: 10 Jan 2007 18:24:54 -0800
Subject: IDLE Python and Environment Variables
Message-ID: <1168482294.349660.137380@i56g2000hsf.googlegroups.com>

Hello community:
I post this because I could not find satisfactory answers in the posts
generated by this nice group.
I work on winXP. I have many little python applications in different
folders, each application can share or not other objects located in the

same or other folders.
The way I work to use these applications is:
1)      For almost everyone, I execute a corresponding ".bat file" into

which I define and/or include values for some "temporal"
environment variables that let me find all the objects that the
selected application uses. Sometimes I include in the .bat file the
execution of the application, but generally I leave in a prompt status,

ready to invoke python or some dos commands.
2)      When I close the command prompt window, there are no traces of
my
enviroment variables in my windows system (that is right). Only the
default windows environment variables remain.

I tried to do the same with the IDLE (and I imagine tha same occurs
with Python command line), but I have the next problem:
I can not find in IDLE (or another app?) the way to previously define
and/or include automatically values for my "temporal" environment
variables as I do in the .bat files. The use of Control Panel -> System

-> Advanced is tedious to use as, my enviroment variables values are
"temporal". 
Any advice,  please???



From jamesthiele.usenet at gmail.com  Wed Jan 10 13:20:37 2007
From: jamesthiele.usenet at gmail.com (James Thiele)
Date: 10 Jan 2007 10:20:37 -0800
Subject: Seattle Python Interest Group Thursday at 7:00 PM
Message-ID: <1168453237.257064.142040@77g2000hsv.googlegroups.com>

7pm at the bar below Third Place books in Ravenna:
http://www.seapig.org/ThirdPlaceMeetingLocation



From kuldjlevelet at gmail.com  Thu Jan 18 07:13:52 2007
From: kuldjlevelet at gmail.com (0k-)
Date: 18 Jan 2007 04:13:52 -0800
Subject: classes: need for an explanation
In-Reply-To: <1169121502.779509.138890@m58g2000cwm.googlegroups.com>
References: <1169121502.779509.138890@m58g2000cwm.googlegroups.com>
Message-ID: <1169122432.139579.310260@q2g2000cwa.googlegroups.com>

oops, i forgot to mention i'm using interpreter version 2.4.3



From mohitbhatt79 at gmail.com  Fri Jan 12 13:27:19 2007
From: mohitbhatt79 at gmail.com (mohit)
Date: 12 Jan 2007 10:27:19 -0800
Subject: I need to consume a .NET web service in a Python client
Message-ID: <1168626439.257622.134700@38g2000cwa.googlegroups.com>

Hello,

I am a .NET developer experimenting with Python.
I need to consume a .NET web service in a Python client. how do I go
about it?
which libraries do i need?
pointers to help me get started would be much appreciated.
I am just a newbie to the Python world so please be bear with my novice
queries.

thanks in advance,
Mohit



From nagle at animats.com  Tue Jan 30 13:24:20 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 30 Jan 2007 18:24:20 GMT
Subject: Convert raw data to XML
In-Reply-To: <1170125415.883023.316950@s48g2000cws.googlegroups.com>
References: <1170124927.718200.225080@m58g2000cwm.googlegroups.com>
	<1170125415.883023.316950@s48g2000cws.googlegroups.com>
Message-ID: <o3Mvh.67204$qO4.48842@newssvr13.news.prodigy.net>

    Actually, that's not "raw data" coming in, that's valid XML.
Why do you need to indent it?  Just write it to a file.

    If you really need to indent XML, get BeautifulSoup, read the
XML in with BeautifulStoneSoup, and write it back out with
"prettify()".  But if the next thing to see that XML is a program,
not a human, why bother?

				John Nagle

Justin Ezequiel wrote:
> On Jan 30, 10:42 am, elrondru... at gmail.com wrote:
> 
>>For example the raw data is as follows
>>
>><?xml version="1.0" ?><Blah><ABC><Id id="1"/><Description>SomeText </
>>Description><Result>PassorFail</Result></ABC></Blah>
>>
>>without spaces or new lines. I need this to be written into an XML
>>file as
>>
>><?xml version="1.0" ?>
>><Blah>
>>       <ABC>
>>              <Id id="1"/>
>>              <Description>
>>                         SomeText
>>              </Description>
>>              <Result>
>>                         PassorFail
>>              </Result>
>>      </ABC>
>></Blah>
>>
> 
> raw = r'<?xml version="1.0" ?><Blah><ABC><Id id="1"/
> 
>><Description>SomeText </Description><Result>PassorFail</Result></
> 
> ABC></Blah>'
> import xml.dom.ext
> import xml.dom.minidom
> doc = xml.dom.minidom.parseString(raw)
> xml.dom.ext.PrettyPrint(doc)
> <?xml version='1.0' encoding='UTF-8'?>
> <Blah>
>   <ABC>
>     <Id id='1'/>
>     <Description>SomeText </Description>
>     <Result>PassorFail</Result>
>   </ABC>
> </Blah>
> 
> 


From deets at nospam.web.de  Wed Jan 31 13:11:57 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 31 Jan 2007 19:11:57 +0100
Subject: "Correct" db adapter
References: <1170253666.826691.276800@s48g2000cws.googlegroups.com>
	<45c0b8cd$0$5072$ba4acef3@news.orange.fr>
	<mailman.3350.1170259167.32031.python-list@python.org>
	<1170262532.590048.247580@a75g2000cwd.googlegroups.com>
Message-ID: <52c4fdF1o9fd9U1@mid.uni-berlin.de>

king kikapu wrote:

> Thanks for the replies.
> 
> I think i do not need something like ORM, but just a db-module that i
> can "work" the database with it.
> I just want to know if pyodbc is the "correct" solution to do so or if
> it is another db-module that is more
> usefull for this job.

I think you've got something wrong. There is no such thing as a generic
DB-Adapter, except maybe from the mxODBC which pushes the abstraction to
the ODBC-layer.

If your app is DB-API2.0-compatible, you should be able to more or less just
use your code with different adapters. There are several ways to accomplish
a configurable way, but in the end it boils down to someting like this:

if is_postgres:
  import psycopg2 as db
if is_mysql:
  import MySQLdb as db

Then db can be used to connect and query the db. A thin layer on top of that
should maybe be written to cover different parameter-styles, but that
shouldn't be too hard.

Diez


From cping at dso.org.sg  Tue Jan 16 02:27:55 2007
From: cping at dso.org.sg (Jeremy)
Date: Tue, 16 Jan 2007 15:27:55 +0800
Subject: Python Threads and C Semaphores
Message-ID: <eohuov$js1$1@nobel.pacific.net.sg>

Hello,

I have a fat C++ extension to a Python 2.3.4 program. In all, I count
five threads. Of these, two are started in Python using
thread.start_new_thread(), and both of these wait on semaphores in the C++
extension using sem_wait(). There also are two other Python threads and one 
thread running wholly in
the extension.

I notice that when one of the Python threads calls the extension and waits
on a semaphore, all but the C++ thread halt even when not waiting on any
semaphore. How do we get this working right?

Thank you,
Jeremy




From tdelaney at avaya.com  Wed Jan 31 16:43:55 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Thu, 1 Feb 2007 08:43:55 +1100
Subject: Conditional expressions - PEP 308
Message-ID: <2773CAC687FD5F4689F526998C7E4E5FF1EC77@au3010avexu1.global.avaya.com>

Colin J. Williams wrote:

> Yes, I agree.  The ternary operator is a step forward.

That's still debateable ;)

Pro: It puts paid to the "python doesn't have a ternary operator" and
and/or abuse.

Con: It shouldn't ever be used.

Cheers,

Tim Delaney


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Jan  3 09:01:00 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 03 Jan 2007 15:01:00 +0100
Subject: list/dictionary as case statement ?
References: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
	<mailman.2232.1167806595.32031.python-list@python.org>
	<71pmp2tq1klma5urhkfiv8bpq6u8sgtj06@4ax.com>
Message-ID: <501r8sF1dp76aU1@mid.individual.net>

Tom Plunket wrote:

> Often (always?) RISC architectures' instruction+operand lengths
> are fixed to the word size of the machine.  E.g. the MIPS 3000 and
> 4000 were 32 bits for every instruction, and PC was always a
                                               ^^
> multiple of four.

Intels aren't RISC, are they?

But for PowerPC it's the same, every instruction has 32 bit.

Regards,


Bj?rn

-- 
BOFH excuse #278:

The Dilithium Crystals need to be rotated.



From gagsl-py at yahoo.com.ar  Sun Jan 28 20:03:46 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 28 Jan 2007 22:03:46 -0300
Subject: memory leak
In-Reply-To: <c6b295ee0701241706x1245db67wefa002b4c4b489c6@mail.gmail.co
 m>
References: <c6b295ee0701241706x1245db67wefa002b4c4b489c6@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070128214301.01c36438@yahoo.com.ar>

At Wednesday 24/1/2007 22:06, john g wrote:

>i have a memory leak issue with extension function that im working 
>on. it reads data from a binary file into a stl vector then creates 
>a new list to pass back to the python interface. the function works 
>the first 1021 times but then gives a segmentation fault (core 
>dumped). heres the business part of the code:
>
>
>//read data
>     vector<float> data;
>     float temp;
> 
>
>     for(int x=0;x<np*2;x++)
>     {
>         fread(&temp,sizeof(float),1,datfil);
>         data.push_back(temp);
>     }
> 
>
>     //convert vector to list
>     PyObject *newlist = PyList_New(np*2);
>     PyList_SetItem(newlist, 0,PyFloat_FromDouble(data[0]));
>     for(int x=0;x<np*2;x++)
>     {
>         PyList_SetItem(newlist, x,PyFloat_FromDouble(data[x]));
>     }
> 
>
> 
>
> 
>
>     //send back list
>     return newlist;

You have to check for possible errors. And you don't need to build 
the C++ vector, just use PyList_SET_ITEM on each value as you read 
it. (_SET_ITEM because it's a new, empty, list). This is how I'd do 
that (untested):

    float temp;
     PyObject *newlist;

     newlist = PyList_New(np*2);
     if (newlist == NULL)
         return NULL;
     for(int x=0;x<np*2;x++)
     {
         fread(&temp,sizeof(float),1,datfil);
         // fread could fail, you should do some error handling here, 
search the python
         // sources for examples; possibly setting an exception and "goto err"
         PyList_SET_ITEM(newlist, x, PyFloat_FromDouble(temp));
     }
     if (PyErr_Occurred()) {
         goto err;
     }
     return newlist;
err:
     Py_DECREF(newlist);
     return NULL;



-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From bdesth.quelquechose at free.quelquepart.fr  Fri Jan 12 17:52:47 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 12 Jan 2007 23:52:47 +0100
Subject: ArchGenXML please help
In-Reply-To: <mailman.2654.1168623618.32031.python-list@python.org>
References: <8301441.post@talk.nabble.com>	<45a7bc70$0$299$426a34cc@news.free.fr>
	<mailman.2654.1168623618.32031.python-list@python.org>
Message-ID: <45a80ad9$0$311$426a74cc@news.free.fr>

tonydevlin a ?crit :
> 
> 
> Bruno Desthuilliers wrote:
> 
>>tonydevlin a ?crit :
>>
>>>I am creating a workflow in plone using argouml and archgenxml.  I have
>>>been
>>>following the steps on the site:-
>>>http://plone.org/documentation/tutorial/anonymously-adding-custom-content-types-with-argouml-and-archgenxml/creating-a-class-and-workflow-with-argouml
>>>
>>>However I am confused at step 9 in creating the class section, where it
>>>says:
>>>"Now, save this file as "ProcessImprovement.zargo".  Pull up a command
>>>prompt and navigate to that directory.  Make sure that you've added the
>>>ArchGenXML directory to your env path, and type the following:
>>>C:\Sandbox\Plone\Tutorial>ArchGenXML.py ProcessImprovement.zargo"
>>>
>>>I have saved the file in the location 
>>>C:\Documents and Settings\Tony\Desktop\Test\ProcessImprovement.zargo
>>>However I dont know what to type in the python command prompt!!!
>>
>>Which *python* command prompt ? The author is talking about a shell, 
>>here (you know, this strange stuff that looks like good ole time DOS...).
>>
>>
>>-- 
>>http://mail.python.org/mailman/listinfo/python-list
>>
>>
>>I yes sorry I was obviously not thinking properly, however there is still
>>a problem, when I run this in dos after I have changed to the correct
>>directory the ArchGenXML file that I downloaded does not work. 

"does not work" is the worst possible description of a problem.

>> I renamed
>>it from its original name because that did not work, it just came up with
>>can not find program for it to run off.  It still does the same.

The same what ? (no, don't answer)

Tony, I don't mean to be rude, but may I suggest that you first learn to 
use your system, then learn to run a  Python program from the command 
line on your system ? FWIW, none of the problems you exposed so far is 
related to Python...


From kmsmgill at gmail.com  Fri Jan 19 09:00:20 2007
From: kmsmgill at gmail.com (kmsmgill at gmail.com)
Date: 19 Jan 2007 06:00:20 -0800
Subject: Login Form
References: <mailman.2893.1169196490.32031.python-list@python.org>
Message-ID: <1169215219.940343.90960@51g2000cwl.googlegroups.com>

Ghirai wrote:
> Hello python-list,
>
> I need to make a login form, if possible without cookies.
> Can anyone point me in the right direction? Or are there any
> examples?
>
> Thanks.
>
> --
> Best regards,
> Ghirai.

You'd do pretty good using the 'cgi' module, which is documented at
http://www.python.org/doc/lib/module-cgi.html

A quick web search found an example site for the cgi module:
http://www.cs.virginia.edu/~lab2q/lesson_7/

Don't be afraid to search for good examples on the web, adapt them, and
try them out on your own box. 

--Kevin



From steve at holdenweb.com  Wed Jan 24 08:35:08 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 24 Jan 2007 13:35:08 +0000
Subject: Thoughts on using isinstance
In-Reply-To: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
Message-ID: <45B7608C.4000007@holdenweb.com>

abcd wrote:
> In my code I am debating whether or not to validate the types of data
> being passed to my functions.  For example
> 
> def sayHello(self, name):
>     if not name:
>         rasie "name can't be null"
>     if not isinstance(name, str):
>         raise "name must be a string"
>     print "Hello " + name
> 
> Is the use of isinstance a "bad" way of doing things?  is it a "heavy"
> operation?  for example, if I use this in each function validate input
> will it slow things down a lot?
> 
> just curious how you might handle this type of situation (other than
> not validating at all).
> 
> thanks
> 
The "Python way" is to validate by performing the operations you need to 
perform and catching any exceptions that result. In the case of your 
example, you seem to be saying that you'd rather raise your own 
exception (which, by the way, should really be a subclass of Exception, 
but we will overlook that) that relying on the interpreter to raise a 
ValueError or a TypeError. Is there really any advantage to this? You 
increase your code size and add *something* to execution time with 
little real purpose.

People coming to Python after C++ or some similar language that allows 
or requires parameter type declarations often don't feel comfortable 
taking this direction to start with, but  it works well for most of us.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From smusnmrNOSPAM at yahoo.com  Sat Jan 20 14:41:33 2007
From: smusnmrNOSPAM at yahoo.com (Siggi)
Date: Sat, 20 Jan 2007 20:41:33 +0100
Subject: Win GUI application: avoiding DOS console
References: <eotkr7$ffdf$1@zam602.zam.kfa-juelich.de>
	<45b25ec1$0$16367$426a74cc@news.free.fr>
Message-ID: <eotr4h$fgat$1@zam602.zam.kfa-juelich.de>

Thanks, but I don't mean that, I am looking for the method keeping *.py.

"Bruno Desthuilliers" <bdesth.quelquechose at free.quelquepart.fr> schrieb im 
Newsbeitrag news:45b25ec1$0$16367$426a74cc at news.free.fr...
> Siggi a ?crit :
>> Hi all,
>>
>> how do I avoid the DOS console show-up when starting a WinXP GUI 
>> application with mouseclick on the respective Python file?
>
> rename yourfile.py to yourfile.pyw 




From sschwarzer at sschwarzer.net  Sat Jan  6 20:37:26 2007
From: sschwarzer at sschwarzer.net (Stefan Schwarzer)
Date: Sun, 07 Jan 2007 02:37:26 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <mailman.2383.1168131242.32031.python-list@python.org>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
Message-ID: <45A04ED6.2050403@sschwarzer.net>

On 2007-01-07 01:54, BJ?rn Lindqvist wrote:
> Google for "python for consenting adults"
>
> Or ask yourself the opposite question. Why does C++ and C# prefer more
> private data? It is given that emphasizing private data
> (encapsulation) leads to more internal complexity and more lines of
> code because you have to write getters and setters and stuff. With
> that in mind, why do you think that data encapsulation makes code less
> error prone? Can you prove it? Or do you have anecdotal evidence of
> where data encapsulation saved your ass?
>
> IMHO, that data hiding is good, is one of those ideas that have been
> repeated so much that virtually everyone thinks it is true.  But
> Python proves that it isn't necessarily so.

I think attributes (callable or not) which relate to the
abstraction of the class should be "public" (special methods
or without leading underscore). Attributes that are there for a
specific implementation of the abstraction should be "private".

The internal implementation of a class is more-often changed
in incompatible ways than the abstraction, so distiguishing
between a public and a private interface will probably save
you from reworking the clients of a class if you prefer the
public interface. It will also make the client code easier to
understand.

Admittedly, there are special cases where you want to access
private attributes, e. g. debugging; that's ok.

In summary, the distinction between public and non-public
attributes IMHO makes sense, but I don't think that the
distinction should be enforced by the language as in C++
or Java.

Stefan


From CRhode at LacusVeris.com  Mon Jan 22 18:07:39 2007
From: CRhode at LacusVeris.com (Chuck Rhode)
Date: Mon, 22 Jan 2007 17:07:39 -0600
Subject: beep or sound playing under linux
In-Reply-To: <pFath.50034$oA1.40310@newsfe19.lga>
References: <pFath.50034$oA1.40310@newsfe19.lga>
Message-ID: <20070122230739.GG13804@loki>

hg wrote this on Mon, Jan 22, 2007 at 04:12:50PM +0100.  My reply is below.

> Is there a way to do that?  (Make noise.)

In Gnome there is:

gtk.gdk.beep()

-- 
.. Chuck Rhode, Sheboygan, WI, USA
.. Weather:  http://LacusVeris.com/WX
.. 28? ? Wind WSW 10 mph ? Sky overcast.



From leonel.gayard at gmail.com  Wed Jan  3 13:52:02 2007
From: leonel.gayard at gmail.com (leonel.gayard at gmail.com)
Date: 3 Jan 2007 10:52:02 -0800
Subject: A python library to convert RTF into PDF ?
In-Reply-To: <5stnp25m2uffc4n5k7g9e68hk2l85u4fmm@4ax.com>
References: <1167846487.943390.192130@a3g2000cwd.googlegroups.com>
	<5stnp25m2uffc4n5k7g9e68hk2l85u4fmm@4ax.com>
Message-ID: <1167850322.373355.327020@s34g2000cwa.googlegroups.com>

No, this won't work.

First, pdflatex is too slow. Second, my templates are M$-Word doc
files, and they cannot be easily converted to tex. I have tried to
convert them to tex using OpenOffice, but the result is ugly as hell.

I cannot convert the doc files into PDF, because I do not have a
library that allows me to manipulate PDF files. Reportlab does *not* do
the trick, it can create new pdf files, but it cannot manipulate
existing pdf files.

So, converting the doc files to RTF, in order to manipulate them is my
best chance. Now how can I convert them to PDF ?

[]'s
Leonel


Tom Plunket wrote:
> leonel.gayard at gmail.com wrote:
>
> > So, what library can I use to convert from RTF to PDF ? GPL / BSD
> > Libraries are welcome.
>
> If you could write to LaTeX files instead, you could then just use
> pdflatex that comes with all of the LaTeX distributions.
> 
> 
> -tom!
> 
> --



From guettli.usenet at thomas-guettler.de  Wed Jan 17 10:26:52 2007
From: guettli.usenet at thomas-guettler.de (Thomas Guettler)
Date: 17 Jan 2007 15:26:52 GMT
Subject: IMAP SEARCH Error
References: <1169043202.521317.226910@q2g2000cwa.googlegroups.com>
Message-ID: <516thsF1iu0maU1@mid.individual.net>

Roopesh wrote:

> I am using the imaplib to fetch mails. There is an error thrown in the
> search function, which I am not able to comprehend.

I had difficulties with the imaplib, too. It is very low level. You need
to know some parts of the IMAP protocol.

I solved my problems by checking with ethereal (wireshark) what
other applications (KMail, getmail) do. 

getmail is like fetchmail, but written in Python. I found some hints
by looking at its source.

HTH,
  Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From bdesth.quelquechose at free.quelquepart.fr  Sun Jan  7 15:50:40 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 07 Jan 2007 21:50:40 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <mailman.2394.1168189690.32031.python-list@python.org>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
	<mailman.2394.1168189690.32031.python-list@python.org>
Message-ID: <45a156e4$0$289$426a74cc@news.free.fr>

Thomas Ploch a ?crit :
> sturlamolden schrieb:
(snip)
> 
>>As mentioned in other replies, it is not rocket science to access a
>>class private data. In C++ you can cast to void*, in Java and C# you
>>can use reflection. C++ is said to be an "unsafe" language because
>>programmers can, using a few tricks, mess with the vtables. But how
>>many really do that?
>  
> Exactly, if they were available, a lot more would do that.

Do you have any concrete evidence ? FWIW, I've seen a *lot* of Python 
code, and very very few uses of _implementation stuff - most of them 
being legitimate.

> I think this
> is the point. Programmers who can do that normally are sensible towards
> that people who have designed this or that knew what they were doing.
> But there are enough people that don't have a clue and _will_ fiddle
> around and then flame all kind of mailing lists with requests for help
> cause they did it wrong.

The fact is that there's no cure for stupidity. If you want a language 
explicitly designed to "protect" dummies from themselves, you know where 
to find it. Why should normally intelligent peoples have to suffer from 
this ? Are you going to forbid hammers because dummies could smash their 
fingers then complain ?


From nospam at nospam.net  Wed Jan 31 00:34:07 2007
From: nospam at nospam.net (Andrew)
Date: Tue, 30 Jan 2007 21:34:07 -0800
Subject: socket.inet_ntop, and pton question
In-Reply-To: <12rpns1tkp0e34@corp.supernews.com>
References: <12rpns1tkp0e34@corp.supernews.com>
Message-ID: <45C02A4F.6040000@nospam.net>

Hi I just thought I would mention that I found what I needed from dnspython

if anyone ever needs ;)

http://www.dnspython.org/


From nmm1 at cus.cam.ac.uk  Wed Jan 10 13:32:54 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 10 Jan 2007 18:32:54 GMT
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<1168452879.866265.36880@i39g2000hsf.googlegroups.com>
Message-ID: <eo3bgm$c98$1@gemini.csx.cam.ac.uk>


In article <1168452879.866265.36880 at i39g2000hsf.googlegroups.com>,
"sturlamolden" <sturlamolden at yahoo.no> writes:
|> 
|> In any case, this means that Python can happily keep its GIL, as the
|> CPU bound 'HPC' tasks for which the GIL does matter should be done
|> using multiple processes (not threads) anyway. That leaves threads as a
|> tool for programming certain i/o tasks and maintaining 'responsive'
|> user interfaces, for which the GIL incidentally does not matter.

Yes.  That is the approach being taken at present by almost everyone.

|> I wonder if too much emphasis is put on thread programming these days.
|> Threads may be nice for programming web servers and the like, but not
|> for numerical computing. Reading books about thread programming, one
|> can easily get the impression that it is 'the' way to parallelize
|> numerical tasks on computers with multiple CPUs (or multiple CPU
|> cores). But if threads are inherently designed and implemented to stay
|> idle most of the time, that is obviously not the case.

You have to distinguish "lightweight processes" from "POSIX threads"
from the generic concept.  It is POSIX and Microsoft threads that are
inherently like that, and another kind of thread model might be very
different.  Don't expect to see one provided any time soon, even by
Linux.

OpenMP is the current leader for SMP parallelism, and it would be
murder to produce a Python binding that had any hope of delivering
useful performance.  I think that it could be done, but implementing
the result would be a massive task.  The Spruce Goose and Project
Habbakuk (sic) spring to my mind, by comparison[*] :-)

|> I like MPI. Although it is a huge API with lots of esoteric functions,
|> I only need to know a handfull to cover my needs. Not to mention the
|> fact that I can use MPI with Fortran, which is frowned upon by computer
|> scientists but loved by scientists and engineers specialized in any
|> other field.

Yup.  MPI is also debuggable and tunable (with difficulty).  Debugging
and tuning OpenMP and POSIX threads are beyond anyone except the most
extreme experts; I am only on the borderline of being able to.

The ASCI bunch favour Co-array Fortran, and its model matches Python
like a steam turbine is a match for a heart transplant.


[*] They are worth looking up, if you don't know about them.


Regards,
Nick Maclaren.


From sturlamolden at yahoo.no  Mon Jan 29 10:14:52 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 29 Jan 2007 07:14:52 -0800
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <7x64apzx8f.fsf@ruckus.brouhaha.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<7x3b5uwfa2.fsf@ruckus.brouhaha.com>
	<1170082883.393745.244840@a34g2000cwb.googlegroups.com>
	<7x64apzx8f.fsf@ruckus.brouhaha.com>
Message-ID: <1170083692.114100.109100@k78g2000cwa.googlegroups.com>



On Jan 29, 4:08 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "Szabolcs Nagy" <nszabo... at gmail.com> writes:
> > file('/dev/urandom').read(6).encode('base64')
> > (oneliner and without import sa op requested)Nice, though Un*x dependent (os.urandom is supposed to be portable).

Is os.urandom cryptographically strong on all platforms?



From horpner at yahoo.com  Wed Jan 10 09:31:47 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Jan 2007 15:31:47 +0100
Subject: An iterator with look-ahead
Message-ID: <slrneq9ubo.bg.horpner@FIAD06.norwich.edu>

For use in a hand-coded parser I wrote the following simple
iterator with look-ahead. I haven't thought too deeply about what
peek ought to return when the iterator is exhausted. Suggestions
are respectfully requested. As it is, you can't be sure what a
peek() => None signifies until the next iteration unless you
don't expect None in your sequence.

Using itertools.tee is the alternative I thought about, but
caveates in the documentation disuaded me.

class LookAheadIter(object):
    """ An iterator with the a peek() method, so you can see what's coming next.

    If there is no look-ahead, peek() returns None.

        >>> nums = [1, 2, 3, 4, 5]
        >>> look = LookAheadIter(nums)
        >>> for a in look:
        ...    print (a, look.peek())
        (1, 2)
        (2, 3)
        (3, 4)
        (4, 5)
        (5, None)
    """
    def __init__(self, data):
        self.iter = iter(data)
        self.look = self.iter.next()
        self.exhausted = False
    def __iter__(self):
        return self
    def peek(self):
        if self.exhausted:
            return None
        else:
            return self.look
    def next(self):
        item = self.look
        try:
            self.look = self.iter.next()
        except StopIteration:
            if self.exhausted:
                raise
            else:
                self.exhausted = True
        return item

-- 
Neil Cerutti
We've got to pause and ask ourselves: How much clean air do we really need?
--Lee Iacocca


From skip at pobox.com  Mon Jan  8 09:15:01 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 8 Jan 2007 08:15:01 -0600
Subject: Table
In-Reply-To: <1168215643.745782.34050@s80g2000cwa.googlegroups.com>
References: <1168215643.745782.34050@s80g2000cwa.googlegroups.com>
Message-ID: <17826.20965.134699.397403@montanaro.dyndns.org>


    >> Someone know how do I get the collunm's number of a gkt.Table ?

This is probably better asked on the pygtk mailing list.  Your request seems
underspecified.  You want the column number given what input?  A child
widget of the Table?  If so, look at gtk.Container's child_get_property
method and the list of child properties for gtk.Table children:

    http://www.pygtk.org/docs/pygtk/class-gtkcontainer.html
    http://www.pygtk.org/docs/pygtk/class-gtktable.html

Skip



From vgvr620034 at gmail.com  Fri Jan 19 07:07:12 2007
From: vgvr620034 at gmail.com (raghu)
Date: 19 Jan 2007 04:07:12 -0800
Subject: Standard streams
Message-ID: <1169208432.786099.199690@11g2000cwr.googlegroups.com>

what is standard streams in case of python?



From ziga.seilnacht at gmail.com  Tue Jan 16 18:39:37 2007
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 16 Jan 2007 15:39:37 -0800
Subject: Class data members in C
References: <eojhuu$72c$1@gemini.csx.cam.ac.uk>
Message-ID: <1168990776.614171.130940@v45g2000cwv.googlegroups.com>

Nick Maclaren wrote:
> Hmm.  The extensions documentation describes how to add instance
> members to a class (PyMemberDef), but I want to add a class member.
> Yes, this is constant for all instances of the class.
>
> Any pointers?

Add something like this to your PyMODINIT_FUNC after you have
initialized your type with PyType_Ready:

PyDictSetItemString(YourType.tp_dict, "attrname", attrvalue);

Ziga



From bdesth.quelquechose at free.quelquepart.fr  Mon Jan  8 16:24:55 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 08 Jan 2007 22:24:55 +0100
Subject: Recommendations (or best practices)  to define functions (or
	methods)
In-Reply-To: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
Message-ID: <45a2b060$0$296$426a74cc@news.free.fr>

vizcayno a ?crit :
> Hello:
> Need your help in the "correct" definition of the next function. If
> necessary, I would like to know about a web site or documentation that
> tells me about best practices in defining functions, especially for
> those that consider the error exceptions management.
> I have the next alternatives but I think there are better:
> 
> Alternative 1:
> =============
> def ExecuteSQL(cmdSQL, cursor):

The recommended naming scheme is all_lower for functions, methods and 
variables, CamelCase for classes and ALL_UPPER for pseudo-constants.

>     try:
>         cursor.execute(cmdSQL)
>     except Exception, e:
>         return e
>     return 1
> 
> Seems a good solution

Err... The whole point of exceptions is to avoid using return values as 
error code. Your code would be *much* better without this braindead 
(sorry) "exception handling":

def execute_sql(sql, cursor):
   cursor.execute(sql)

And now, since it's obvious that it's just a totally useless function 
call. So just ditch this function, and just call cursor.execute directly !-)

(snip other examples of how to not handle exceptions...)


From m.yanowitz at kearfott.com  Mon Jan 22 11:53:48 2007
From: m.yanowitz at kearfott.com (Michael Yanowitz)
Date: Mon, 22 Jan 2007 11:53:48 -0500
Subject: Is there a better way to implement this:
In-Reply-To: <ep2o5c$1aa$1@online.de>
Message-ID: <01b101c73e45$e32b4dc0$0d7d12ac@kearfott.com>

Thanks.

   I suppose I could have used time.sleep(seconds) here.
I did it in 0.01 because in an earlier verion, I did something
else between the sleeps.
   I guess I am looking for something portable (both
Windows and Linux) where I can abort a function after
a certain time limit expires.

-----Original Message-----
From: python-list-bounces+m.yanowitz=kearfott.com at python.org
[mailto:python-list-bounces+m.yanowitz=kearfott.com at python.org]On Behalf
Of Benjamin Niemann
Sent: Monday, January 22, 2007 11:19 AM
To: python-list at python.org
Subject: Re: Is there a better way to implement this:


Michael Yanowitz wrote:

> Hello:
>
>    I wrote the code below (much irrelevant code removed).
> This doesn't quite work. What I wanted it to do was
>  a) Execute function ftimed, which takes a function and a timeout
>     in seconds.
>  b) This will also execute function abort() as a thread.
>     This function just runs for the specified
>     number of seconds and returns.
>     However, before it returns, throws an exception.
> c)  If test() is still running when abort() is
>     finished, ftimed() should catch the exception and
>     return.
>
> It is catching the exception, however it continues running the function.
> Why does it continue and not return?

The exception is raised in the thread that executes the abort() function.
The exception does not get caught and terminates this thread. The other
(main) thread is unaffected - exceptions are local to a thread and there is
currently no (portable) way to raise an exception in another thread.

> What am I missing, or is there a better way to
> implement this (having ftimed() return when the
> abort-timer time is exceeded?

You may use the signal.alarm() function, if you are on a UNIXoid system and
you have only a signle time-out at a time (e.g. not nested).

> import time, thread, sys
>
> thread_finished = "MAX RUN TIME EXCEEDED!"
>
> def abort (seconds):
>      start_time = time.time()
>      while ((time.time() - start_time) < seconds):
>         time.sleep(0.01)

any reason for not using time.sleep(seconds) here?

I suppose I could have, but in earlier versions

>      print "script run time exceeded max_run_time of", seconds, "seconds."
>      raise thread_finished
>      return
>
>
> def test():
>     i = 0
>     while (True):
>        time.sleep(1)
>        print "HELLO", i
>        i+=1
>
>
> def ftimed (func, seconds):
>     thread.start_new_thread (abort, (seconds,))
>
>     try:
>         func()
>     except thread_finished:
>         print  "Timeout"
>         return
>
> ftimed (test, 30)
> print "Script finished"

--
Benjamin Niemann
Email: pink at odahoda dot de
WWW: http://pink.odahoda.de/
--
http://mail.python.org/mailman/listinfo/python-list




From no-spam at no-spam-no-spam.invalid  Wed Jan 10 08:03:15 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 10 Jan 2007 14:03:15 +0100
Subject: add re module to a embeded device phyton interpreter
In-Reply-To: <1168425645.340291.42720@p59g2000hsd.googlegroups.com>
References: <1168425645.340291.42720@p59g2000hsd.googlegroups.com>
Message-ID: <eo2o6k$ha6$1@news.albasani.net>

odlfox wrote:
>    I hav to add the re (regular expressions) functionality to an
> Embeded device that I'm using.  I read the re.py file and it says I
> need several dependencies, one of them is the pcre module but I found
> no pcre.py or pcre.pyc file.  Someone knows where to find something to
> solve my problem. Thanks a lot
> 

that drills down to a .dll/.so thing depending on installation and python version.

Best make a project/test/dummy script using all the things you want - or actually your project as it. 
And then use cx-freeze like "FreezePython -OO mystart.py" to let him collect all the dependent modules in a dist-folder. Then you don't have to worry about all the details yourself.
You can also use UPX and 7zip to further compress the dll's/so's and the py-modules zip archive well.


Robert


From tim at tdw.net  Tue Jan 16 12:59:43 2007
From: tim at tdw.net (Tim Williams)
Date: Tue, 16 Jan 2007 17:59:43 +0000
Subject: smtplib question
In-Reply-To: <B63066172.350.8440.3@mxextra>
References: <B63066172.350.8440.3@mxextra>
Message-ID: <9afea2ac0701160959n61c32d27gc8ee627603366327@mail.gmail.com>

On 16/01/07, gandalf gold <gantgold at yahoo.com> wrote:
>
> Hi everyone,
>
> I was trying out smtplib and found out that I can email to anyone in my
> domain but not to an email address not in the domain. From browsing on the
> web, it seems that this has to do with the configuration of the mail server.
> The mail server in my organization is MS exchange. Obviously I can email to
> any email address from my MS outlook.
>
> What's the easiest way to fix the program?
>
> Thanks.
>
> - gan
>
> import sys, smtplib
> fr = "xxx at yyy.com"
> to = "xxx at zzz.com" # will not work
> line = "testing"
> subj = "subject line"
> msg = "From: %s\r\nTo: %s\r\nSubject: %s\r\n\r\n%s" % (fr, to, subj, line)
> server = smtplib.SMTP("EXCHCLUSTER.ccis.edu")
> server.set_debuglevel(1)
> server.sendmail(fr, [to], msg)
> server.quit()
>

You will need to get smtplib to authenticate when connecting to the
exchange server.    Use the login function and the same username/pw
that you use to login to Outlook.

server.login(user, password)

Note: Your exchange administrator may have disabled this function.  (
Your Outlook will almost certainly be using MAPI not SMTP to talk to
the server).

HTH :)


From martin at v.loewis.de  Wed Jan  3 14:14:21 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 03 Jan 2007 20:14:21 +0100
Subject: When argparse will be in the python standard installation
In-Reply-To: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>
References: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>
Message-ID: <459C008D.5040404@v.loewis.de>

PengYu.UT at gmail.com schrieb:
> I feel argparse has some useful things that optparse doesn't have. But
> I can't find it argparse in python library reference. I'm wondering
> when it will be available in the python standard installation.

On its own, never. Somebody has to contribute it to Python, and that
somebody has to be the author.

However, it would be better if missing features where provided in
existing libraries, rather than introducing new libraries to replace
the existing ones (i.e. I would likely reject a patch to add yet another
argument parsing library - we already have getopt and optparse).

Regards,
Martin


From dummy at dummy.nl  Thu Jan 18 08:23:10 2007
From: dummy at dummy.nl (Cecil Westerhof)
Date: Thu, 18 Jan 2007 14:23:10 +0100
Subject: Is it possible to fasten the import of cgi?
References: <45af6f47$0$322$e4fe514c@news.xs4all.nl>
	<1169126216.239740.202950@38g2000cwa.googlegroups.com>
Message-ID: <45af74be$0$330$e4fe514c@news.xs4all.nl>

Daniele Varrazzo wrote:

> Cecil Westerhof wrote:
>> I have a cgi-script dat uses the modules cgi, os, sys and time. Offcourse
>> I can not time the time used to import time, but os and sys do not take
>> more as a millisecond. My script itself takes 3 or 4 milliseconds. But
>> importing cgi takes 95 milliseconds. (This is on my test system a PII 300
>> MHz. Is there a way to make this more fast? The import off cgi makes the
>> script at least 20 times as slow. Something like mod-python is not a
>> possibility. I could use it on my test machine, but not at the osting
>> provider.
> 
> Does the hosting provider support fastcgi? It would avoid starting the
> interpreter at each request too.

I am afraid not. It is very bare bone. Also they do not really support
python. (When they had a problem, perl and bash scripts worked within a
day, python scripts had to wait for one and a halve week.)

I am thinking about switching my provider. What are important things to keep
in mind when selecting another one?



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Jan  9 13:14:33 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 09 Jan 2007 19:14:33 +0100
Subject: help: code formatter?
References: <entknh$8onl$1@zam602.zam.kfa-juelich.de>
	<50f5nnF1fb5uqU1@mid.individual.net>
	<envh9u$cdlp$1@zam602.zam.kfa-juelich.de>
Message-ID: <50i4c9F1fvo3rU2@mid.individual.net>

siggi wrote:
> Bjoern wrote:
 
>> Why don't you just write one? :)
> 
> Very funny! Just learning Python  :(

It isn't funny at all. You'll learn by doing and trying things.
That's how all programmers start.

Regards,


Bj?rn

-- 
BOFH excuse #265:

The mouse escaped.



From letezo at fw.hu  Tue Jan 30 18:31:26 2007
From: letezo at fw.hu (=?iso-8859-2?B?TOl0ZXr1?=)
Date: Wed, 31 Jan 2007 00:31:26 +0100
Subject: Why don't have an object() instance a __dict__ attribute by default?
Message-ID: <004c01c744c6$c2cf5710$8600a8c0@ANNA>

I use Python 2.5, Win32 MSI release.

Setting attributes on an empty object does not work:

>>> a=object()

>>> a.x=1
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'object' object has no attribute 'x'

>>> setattr(a, 'x', 1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'object' object has no attribute 'x'

>>> a.__setattr__('x', 1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'object' object has no attribute 'x'

The dir(a) function indicates, that the object instance has no __dict__ attribute.

However using an empty new style class works fine:

>>> class C(object): pass
...
>>> c=C()
>>> setattr(c, 'x', 1)
>>>

The dir(c) function indicates, that the C instance has a __dict__ attribute.

Python 2.5 manual says:

"Return a new featureless object. object is a base for all new style classes. It has the methods that are common to all instances of new style classes."

Why don't have an object() instance a __dict__ attribute by default?

This may need some explanation in the Python manual.

Viktor
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070131/4c9af8d9/attachment.html>

From robert.kern at gmail.com  Wed Jan 17 17:27:14 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 17 Jan 2007 16:27:14 -0600
Subject: Units of measurement
In-Reply-To: <7x8xg1xr62.fsf_-_@ruckus.brouhaha.com>
References: <7x8xg1xr62.fsf_-_@ruckus.brouhaha.com>
Message-ID: <eom7sd$cop$1@sea.gmane.org>

Paul Rubin wrote:
> I'm sure this has been done before, but it just struck my fancy, an
> example of Python's "emulating numeric types", inspired by the old
> Unix "units" utility, and the Frink language.

Oh yeah, it's been done before. Several times over, in fact.

Unum
http://home.tiscali.be/be052320/Unum.html

Caltech's pyre.units
http://www.cacr.caltech.edu/projects/pyre/

Konrad Hinsen's Scientific.Physics.PhysicalQuantity
http://dirac.cnrs-orleans.fr/ScientificPython/

Will Ware posted one to the list.
http://groups.google.com/group/comp.lang.python/browse_frm/thread/8ed89844218b92c7/0f05aea353c1563d

And there was another one announced here sometime in the past year or so, IIRC,
but I don't recall the name of it or that of the author.  :-(

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From dongarbage at hotmail.com  Sat Jan  6 13:37:17 2007
From: dongarbage at hotmail.com (dongarbage at hotmail.com)
Date: 6 Jan 2007 10:37:17 -0800
Subject: c# application calling Scipy
Message-ID: <1168108637.270801.155950@42g2000cwt.googlegroups.com>

Hi,

Novice here. :)

I'm building a c# application and I want to call functions in SciPy
from that application.

What's the best way to call SciPy methods from a C# program?

Is there a best Python implementation for this? Ironython? Python for
.NET? Enthought?

Thanks in advance,
Don



From sjmachin at lexicon.net  Sun Jan 28 16:32:54 2007
From: sjmachin at lexicon.net (John Machin)
Date: 28 Jan 2007 13:32:54 -0800
Subject: string byte dump
In-Reply-To: <9609c$45bce423$d8a87c2a$8428@NEXICOM.NET>
References: <9609c$45bce423$d8a87c2a$8428@NEXICOM.NET>
Message-ID: <1170019974.514558.247590@v45g2000cwv.googlegroups.com>



On Jan 29, 4:57 am, Jammer <ask... at mail.com> wrote:
> Does anyone that knows python want to write me a byte dump for strings? :-)
>
> I am trying to modify a plugin (that someone else wrote) that uses
> interprocess communication.
> It works on strings without special characters but it fails on other
> stings like "Bj?rk".
>
> It calls decode('utf8') but I guess the strings are not utf8 so I need
> to find out what is being input.

Try the repr() built-in function. Any byte not in printable ASCII will 
be displayed in hex.

| >>> foo = "\xfforick"
| >>> foou = unicode(foo, 'latin1')
| >>> foo8 = foou.encode('utf8')
| >>> print repr(foo), repr(foou), repr(foo8)
| '\xfforick' u'\xfforick' '\xc3\xbforick'




From Hieu.D.Hoang at gmail.com  Wed Jan 24 11:44:55 2007
From: Hieu.D.Hoang at gmail.com (Hieu.D.Hoang at gmail.com)
Date: 24 Jan 2007 08:44:55 -0800
Subject: for thibaut: genuinely excellent pictures - umcu - (1/1)
In-Reply-To: <76554951z39773H643349837Z967779246Q5681E633493486P@news.cuartilla.jp>
References: <76554951z39773H643349837Z967779246Q5681E633493486P@news.cuartilla.jp>
Message-ID: <1169657095.059949.70930@s48g2000cws.googlegroups.com>

Just inclined to fire up python to decode the latter part, just to
realise i've got dictd binding yet ;-)

Probably injected 2 instances of pythons in the spammer thread, for
completion's sake.



From rawebadvert at yahoo.com  Tue Jan 30 21:48:50 2007
From: rawebadvert at yahoo.com (rawebadvert)
Date: 30 Jan 2007 18:48:50 -0800
Subject: Learn How To Write A Resume / CV On Our Free Informational Site
Message-ID: <1170211730.112780.272250@j27g2000cwj.googlegroups.com>

This Website is designed for you to learn how to write a resume on 
your own. Hiring someone to do a resume is not enough learn how to do 
it on your own. If you do hire someone to help you write a resume this 
will help you guide the resume writer to put in the correct 
information for you to increase your chances on getting a job. This is 
a free site no fees. People do need resume templates and resume 
samples as a base to get started on their resumes, but this 
information that I have on my site will help you fill in the resume 
templates or resume samples with the best information to present the 
best possible resume to your potential employer.  No matter what type 
of resume you are writing either a technical resume, sales resume, 
marketing resume, teaching resume, nursing resume, or general resume 
this free site will help you. We do not provide resume samples or 
resume templates just information. If you are a Career Worker looking 
to change positions, a potential new immigrant, or entry level worker, 
Please check us out.


http://www.resumewritersguide.com


ARE YOUR EMPLOYMENT REFERENCES OK WHEN YOU APPLY FOR A JOB HERE ARE 
SOME TIPS


If your looking for employment and you are planning to use references 
read this site first to learn how to protect yourself from bad 
references..



http://www.resumewritersguide.com/resumetipsref.htm



From stephen.mc at gmail.com  Sat Jan 27 05:01:29 2007
From: stephen.mc at gmail.com (Steve)
Date: 27 Jan 2007 02:01:29 -0800
Subject: wx Python event question
In-Reply-To: <1169881014.463339.257190@v45g2000cwv.googlegroups.com>
References: <1169881014.463339.257190@v45g2000cwv.googlegroups.com>
Message-ID: <1169892089.110196.98010@a75g2000cwd.googlegroups.com>

use wx.Timer - you bind a method to a timer event and define the
timer's interval when you start it

timer = wx.Timer(self, -1)
self.Bind(wx.EVT_TIMER, self.timerMethod, timer)
timer.Start(500)


On Jan 27, 5:56 pm, "dudds" <d... at netspace.net.au> wrote:
> Hi I really haven't used wxPython before and I was just wondering if
> there was some sort of timer event that can be used. For example if I
> have a database that I want to query at regular intervals and display
> the results in a window is that possibly to do under a wx Python
> program?
>
> So far I have come across certain event handlers, but they all seem to
> wait for something to happen, like moving the mouse, clicking on a
> button etc. I just want to display the results of a query every so
> often automatically without having to press a button to do so.
>
> I'm not looking for a complete solution as I'm doing this so I can
> teach myself Python, but a bit of a hint or a nudge in the right
> direction would be great.



From facundo at taniquetil.com.ar  Wed Jan 17 11:48:45 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Wed, 17 Jan 2007 16:48:45 +0000 (UTC)
Subject: urrlib2 multithreading error
References: <1168958510.834175.184730@a75g2000cwd.googlegroups.com>
Message-ID: <eolk1c$v2f$1@sea.gmane.org>

viscanti at gmail.com wrote:


> I'm using urllib2 to retrieve some data usign http in a multithreaded
> application.
> Here's a piece of code:
> 		req = urllib2.Request(url, txdata, txheaders)
> 		opener = urllib2.build_opener()
> 		opener.addheaders = [('User-agent', user_agent)]
> 		request = opener.open(req)
> 		data = request.read(1024)
>
> I'm trying to read only the first 1024 bytes to retrieve http headers
> (if is html then I will retrieve the entire page).

Why so much bother? You just can create the Request, open it, and ask
for the headers:

>>> req = urllib2.Request("http://www.google.com.ar")
>>> u = urllib2.urlopen(req)
>>> u.headers["content-type"]
'text/html'
>>> 

Take into account that you can add the headers where you put
"txheaders", it's not necessary to use "addheaders".

And see that I'm not reading the page at all, urllib2.urlopen just
retrieves the headers...

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From steven.bethard at gmail.com  Thu Jan  4 19:45:36 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 4 Jan 2007 17:45:36 -0700
Subject: [ANN] argparse 0.4 - Command-line parsing library
Message-ID: <d11dcfba0701041645u2db3ea27lb3d382b8ea503532@mail.gmail.com>

Announcing argparse 0.4
-----------------------

argparse home:
   http://argparse.python-hosting.com/

argparse single module download:
   http://argparse.python-hosting.com/file/trunk/argparse.py?format=raw

argparse bundled downloads at PyPI:
   http://www.python.org/pypi/argparse/

New in this release
===================

* The add_argument method now allows a positional argument with
nargs='*' to specify a default value::

    >>> parser = argparse.ArgumentParser()
    >>> parser.add_argument('foo', nargs='*', default=['def'])
    >>> parser.parse_args('1 2 3'.split())
    Namespace(foo=['1', '2', '3'])
    >>> parser.parse_args([])
    Namespace(foo=['def'])

About argparse
==============

The argparse module is an optparse-inspired command line parser that
improves on optparse by:

* handling both optional and positional arguments
* supporting parsers that dispatch to sub-parsers
* producing more informative usage messages
* supporting actions that consume any number of command-line args
* allowing types and actions to be specified with simple callables
instead of hacking class attributes like STORE_ACTIONS or
CHECK_METHODS

as well as including a number of other more minor improvements on the
optparse API. To whet your appetite, here's a simple program that sums
its command-line arguments and writes them to a file::

   parser = argparse.ArgumentParser()
   parser.add_argument('integers', type=int, nargs='+')
   parser.add_argument('--log', type='outfile', default=sys.stdout)
   args = parser.parse_args()
   args.log.write('%s\n' % sum(args.integers))
   args.log.close()


From gagsl-py at yahoo.com.ar  Thu Jan 11 04:54:51 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 06:54:51 -0300
Subject: os.popen() not executing command on windows xp
In-Reply-To: <1168508553.151827.261420@k58g2000hse.googlegroups.com>
References: <1168508553.151827.261420@k58g2000hse.googlegroups.com>
Message-ID: <7.0.1.0.0.20070111065147.04149160@yahoo.com.ar>

At Thursday 11/1/2007 06:42, nic wrote:

>a = os.popen('"c:\Program Files\Grisoft\AVG Free\avgscan.exe"
>"c:\program files\temp1\test1.txt"')

Your string contains backquotes, and they have to be escaped.
Either use a raw string: os.popen(r'"c:\Program...) or double all 
backquotes: os.popen('"c:\\Program...)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From yozara at terra.es  Wed Jan 31 02:17:21 2007
From: yozara at terra.es (Zara)
Date: Wed, 31 Jan 2007 08:17:21 +0100
Subject: PY Zip
References: <1170220732.552072.163560@k78g2000cwa.googlegroups.com>
Message-ID: <fgg0s2pv9uojasiirrgdd95q2cel2nk23f@4ax.com>

On 30 Jan 2007 21:18:52 -0800, "GISDude" <gisdudester at gmail.com>
wrote:

>Hi all.
>
>I am trying to find a module that has a Zip utility that I can use in
>Python. I would like to be able to call the module and ZIP up a
>directory. I thought there was such a module, but I have not been able
>to find it.
>
>I need this to be able to be used in Python Win. Is there a ZIP utilty
>already stored with a basic PYTHON download?
>
>Thanks all.


It is included with basic Python installation. Look at Pyton Manulas,
Library Reference, 12. Data Compression and Archiving.

Best regards,

Zara



From eight02645999 at yahoo.com  Sat Jan 27 00:33:47 2007
From: eight02645999 at yahoo.com (eight02645999 at yahoo.com)
Date: 26 Jan 2007 21:33:47 -0800
Subject: strip question
Message-ID: <1169876027.003477.161350@a75g2000cwd.googlegroups.com>

hi
can someone explain strip() for these :
[code]
>>> x='www.example.com'
>>> x.strip('cmowz.')
'example'
[/code]

when i did this:
[code]
>>> x = 'abcd,words.words'
>>> x.strip(',.')
'abcd,words.words'
[/code]

it does not strip off "," and "." .Why is this so?
thanks



From deets at nospam.web.de  Fri Jan 12 03:43:28 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 12 Jan 2007 09:43:28 +0100
Subject: FUCK YOU Jerub on #python, you desynced me for no good reason
In-Reply-To: <1168584166.949097.233620@11g2000cwr.googlegroups.com>
References: <1168584166.949097.233620@11g2000cwr.googlegroups.com>
Message-ID: <50p01oF1hcjs2U1@mid.uni-berlin.de>

gavino schrieb:
> I can't fucking believe this guy.  The chat was jsut getting
> interesting about epoll on linux and twisted moduel for it and he
> desyncs me.
> FUCK JERUB
> complete fucking asshole!!

I've not been there, and maybe it was rather a network glitch than evil 
scheming by "Jerub", whoever that may be.

But if this post serves as an example of your l337 communication skillz, 
I can't blame him from banning you.

So - restrain yourself.


Diez


From robert.kern at gmail.com  Tue Jan  2 11:10:41 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 02 Jan 2007 10:10:41 -0600
Subject: Unsubscribing from the list
In-Reply-To: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>
Message-ID: <ene064$bm5$1@sea.gmane.org>

Dotan Cohen wrote:
> I need to unsubscribe from this list. I've mailed
> users-unsubscribe at python.org but that did not unsubscribe me. I've
> also gone to the list homepage and entered my user information, but
> that just sent me a message that someone had tried to resubscribe this
> username. What must one do to unsubscribe from python-list?

Go here:

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

Go to the bottom of the page. Next to the button "Unsubscribe or edit options",
enter your email address. Click the button. On the next page, click
"Unsubscribe". Follow the instructions in the email that is sent to you.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From Roberto.Bonvallet at cern.ch  Sat Jan 13 18:57:56 2007
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Sat, 13 Jan 2007 23:57:56 +0000 (UTC)
Subject: Comparing a matrix (list[][]) ?
References: <1168730648.038901.187460@v45g2000cwv.googlegroups.com>
Message-ID: <eobrm4$p68$1@cernne03.cern.ch>

jairodsl wrote:
> How can I find the minus element greater than zero in a matrix, my
> matrix is
> 
> matrix=
> [9,8,12,15],
> [0,11,15,18],
> [0,0,10,13],
> [0,0,0,5]
> 
> I dont want to use "min" function because each element in the matrix is
> associated to (X,Y) position.

What output are you expecting from your example matrix?  If you are expecting
it to be 5 (the smallest positive element), using "min" is the way to do it:

    >>> matrix = [[9,  8, 12, 15],
    ...           [0, 11, 15, 18],
    ...           [0,  0, 10, 13],
    ...           [0,  0,  0,  5]]
    >>> min(min(x for x in row if x > 0) for row in matrix)
    5

-- 
Roberto Bonvallet


From nmm1 at cus.cam.ac.uk  Fri Jan 12 14:41:52 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 12 Jan 2007 19:41:52 GMT
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<mailman.2597.1168550439.32031.python-list@python.org>
	<eo6ia5$5bt$1@gemini.csx.cam.ac.uk>
	<mailman.2643.1168611301.32031.python-list@python.org>
	<eo883j$l9d$1@gemini.csx.cam.ac.uk>
	<mailman.2648.1168616202.32031.python-list@python.org>
	<eo8b1r$r9c$1@gemini.csx.cam.ac.uk>
	<mailman.2664.1168630485.32031.python-list@python.org>
Message-ID: <eo8oa0$o4o$1@gemini.csx.cam.ac.uk>


In article <mailman.2664.1168630485.32031.python-list at python.org>,
"Simon Brunning" <simon at brunningonline.net> writes:
|>
|> > |> but there are more use
|> > |> cases for Decimal than for Rational.
|> >
|> > That is dubious, but let's not start that one again.
|> 
|> Decimals are good for holding financial values. There's a whole lot of
|> software out there that deals with money.

Sigh.  I was hoping not to have that myth perpetrated again.

Financial calculations need decimal FIXED-point, with a precisely
specified precision.  It is claimed that decimal FLOATING-point
helps with providing that, but that claim is extremely dubious.
I can explain the problem in as much detail as you want, but would
very much rather not.


Regards,
Nick Maclaren.


From duncan.booth at invalid.invalid  Wed Jan 24 08:48:56 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 Jan 2007 13:48:56 GMT
Subject: Thoughts on using isinstance
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
Message-ID: <Xns98C28C8636DF3duncanbooth@127.0.0.1>

"abcd" <codecraig at gmail.com> wrote:

> In my code I am debating whether or not to validate the types of data
> being passed to my functions.  For example
> 
> def sayHello(self, name):
>     if not name:
>         rasie "name can't be null"
>     if not isinstance(name, str):
>         raise "name must be a string"
>     print "Hello " + name
> 
> Is the use of isinstance a "bad" way of doing things?  is it a "heavy"
> operation?  for example, if I use this in each function validate input
> will it slow things down a lot?
> 
> just curious how you might handle this type of situation (other than
> not validating at all).
> 
For a start, don't raise strings as exceptions: only use instances of 
Exception.

Now consider what your first test does: it throws an error if you pass in 
an empty string. Perhaps you do want to check for that, in which case you 
will need to test for it and throw an appropriate exception.

The first test also catches values such as None, 0 or []. Do you really 
want to throw a different exception for sayHello(0) and sayHello(1)? It 
seems a bit pointless, so the first test should just check against an empty 
string and not against other false objects which would get caught by the 
second test.

Now for the second test. It would probably be useful to say in the 
exception which type was involved, not just that it wasn't a string.
An appropriate exception for these would be something like:

  TypeError: cannot concatenate 'str' and 'int' objects

since that tells you both the types and the operation that failed. Delete 
that second test altogether and you'll get an appropriate exception instead 
of a string which hides all the information.

A good rule is if you want to hide exception information from the user do 
it when displaying the exception not when raising it. That way you can get 
at all the exception information available by changing one place in the 
code instead of having to do it everywhere.

So your modified function should look like:

def sayHello(name):
    if name=="":
        raise ValueError("name can't be blank")
    print "Hello "+name

(this is slightly different than your original in a few other ways: it will 
accept unicode strings so long as they can be encoded in ascii, and its a 
function as there isn't much point having a method which doesn't use self.)


From smusnmrNOSPAM at yahoo.com  Sat Jan 20 12:37:49 2007
From: smusnmrNOSPAM at yahoo.com (Siggi)
Date: Sat, 20 Jan 2007 18:37:49 +0100
Subject: Code reformater?
References: <poe3r2ha92p6vrhtk9b2piso337djv4boo@4ax.com>
Message-ID: <eotjsg$ff68$1@zam602.zam.kfa-juelich.de>


"Vincent Delporte" wrote:
> Hello
>
> When I copy/paste Python code from the web, every so often,
> the TABs are wrong, which means that the code won't work and I have to
> manually reformat the code.
>
> Is there a code reformater that can parse the code to make it right?
>
> Thanks.

Maybe my thread "help: code formatter, 08/01/2007 helps a little? Here are
some of the answers:

*
Why don't you just write one? :)
Seriously: Try.
*
Tools\scripts\reindent.py in your Python distribution.
*
Why, yes, there is:
 http://lacusveris.com/PythonTidy/PythonTidy.python
*
tabnanny ?


siggi






From Roland.Puntaier at br-automation.com  Fri Jan 19 08:50:19 2007
From: Roland.Puntaier at br-automation.com (Roland Puntaier)
Date: Fri, 19 Jan 2007 14:50:19 +0100
Subject: how to mimik a main() function to start a program with entry
	point?
In-Reply-To: <f81479dd0701190530j30d8c31fg2de680240329fb00@mail.gmail.com>
Message-ID: <OF7D8CA449.D972E3BE-ONC1257268.004AA005-C1257268.004C03B4@br-automation.com>

Hi,

>From a python module you could use subprocess  and start the exe. Normally 
one must leave it to the OS to load a binary module, because there are 
certain things done during loading.
Nevertheless the location of the entry point is coded in the binary file 
format (e.g. PE for windows or ELF for Linux)
Whether it is possible from python to make an import of a python module in 
a python package gone through py2exe, I cannot answer.

But I think you mean how to tell py2exe, where the entry point is. Read: 
http://www.py2exe.org/index.cgi/Tutorial

Roland

python-list-bounces+roland.puntaier=br-automation.com at python.org schrieb 
am 19.01.2007 14:30:33:

> hello all.
> I have one simple query and may be that's to stupid to answer but I am
> not finding the answer any ways.
> I have a set of modules in my package and out if which one is my
> actual starting point to my entire program.  say for example I have an
> entire database application ready and I want a main (as in java or c)
> to initiate the program and may be bring up a login screen and then
> pass the control on to the main window.
> if I am giving raw source code that is easy because I will tell user
> to run the command ./xyz.py which has that function.
> but if I freze it into an executable with py2exe for example , how do
> I solve this problem?
> thanks.
> Krishnakant.
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From gherron at islandtraining.com  Wed Jan 31 16:45:55 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 31 Jan 2007 13:45:55 -0800
Subject: win32com.client
In-Reply-To: <1170278964.738118.219600@k78g2000cwa.googlegroups.com>
References: <1170278964.738118.219600@k78g2000cwa.googlegroups.com>
Message-ID: <45C10E13.8000406@islandtraining.com>

vithi wrote:
> Hi
> Any one tell me where I can get (or download) python modules win32com
> or win32com.client because I have to use "Dispatch"  thanks
>
>   
You want the "python for windows" extension, available from
  http://sourceforge.net/projects/pywin32/

Gary Herron



From Jeff.Demel at JavelinDirect.com  Thu Jan 11 12:44:36 2007
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Thu, 11 Jan 2007 11:44:36 -0600
Subject: Learning Python book, new edition?
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734C18E@DMSP-MSG-EVS01.mail.pvt>

>Demel, Jeff wrote:
>> Does anyone know if there's a plan in the works for a new edition of 
>> Learning Python?  The current edition (2nd) is a few years old and 
>> looks like it only covers Python 2.3.

Bj?rn replied:
>IIRC, differences to 2.4 are in it, too.

Interesting.  The description I read said 2.3.  That's good to know.

I'd still like to know if there will be a new edition soon, covering 2.5.  Anyone?


>Jeff's mail server auto-appended:
>> This email is intended only for the individual or entity to which it 
>> is addressed.

Bj?rn replied:
>Mails are _by_definition_ intended only for the addressee. :)

According to our legal department it must be specified, apparently.  They append that legal crap to every email, and it annoys me to no end.

-Jeff



This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From omelnyk at gmail.com  Mon Jan 29 00:18:34 2007
From: omelnyk at gmail.com (Olexandr Melnyk)
Date: Mon, 29 Jan 2007 07:18:34 +0200
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <45bd8130$0$17928$4d3efbfe@news.sover.net>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<45bd8130$0$17928$4d3efbfe@news.sover.net>
Message-ID: <d5f60f0c0701282118k6da7967cy35f8447fdbdc5e3c@mail.gmail.com>

2007/1/29, Leif K-Brooks <eurleif at ecritters.biz>:
>
> NoName wrote:
> > from random import choice
> > import string
> > print ''.join([choice(string.letters+string.digits) for i in
> > range(1,8)])
> >
> > !!generate password once :(
>
> So add a while true: line.
>
> > who can write this smaller or without 'import'?


Being very short in price of readability isn't one of the Python's main
goals.

--------------------------------
Olexandr Melnyk,
http://omelnyk.net/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070129/562a8f70/attachment.html>

From george.sakkis at gmail.com  Sat Jan 13 02:51:04 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 12 Jan 2007 23:51:04 -0800
Subject: Boilerplate in rich comparison methods
References: <pan.2007.01.13.06.52.02.531589@REMOVE.THIS.cybersource.com.au>
Message-ID: <1168674664.792869.213260@m58g2000cwm.googlegroups.com>

Steven D'Aprano wrote:

> I'm writing a class that implements rich comparisons, and I find myself
> writing a lot of very similar code. If the calculation is short and
> simple, I do something like this:
>
>
> class Parrot:
>     def __eq__(self, other):
>         return self.plumage() == other.plumage()
>     def __ne__(self, other):
>         return self.plumage() != other.plumage()
>     def __lt__(self, other):
>         return self.plumage() < other.plumage()
>     def __gt__(self, other):
>         return self.plumage() > other.plumage()
>     def __le__(self, other):
>         return self.plumage() <= other.plumage()
>     def __ge__(self, other):
>         return self.plumage() >= other.plumage()
>
> If the comparison requires a lot of work, I'll do something like this:
>
> class Aardvark:
>     def __le__(self, other):
>         return lots_of_work(self, other)
>     def __gt__(self, other):
>         return not self <= other
>     # etc.
>
> But I can't help feeling that there is a better way. What do others do?

Once upon a time I had written a metaclass to generate the boilerate,
filling in the gaps. It doesn't impose any constraints on which
comparisons you must implement, e.g you may implement __le__ and
__eq__, or __gt__ and __ne__, etc. Season to taste.

http://rafb.net/p/mpvsIQ37.nln.html

George



From gagsl-py at yahoo.com.ar  Tue Jan  9 19:05:30 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 09 Jan 2007 21:05:30 -0300
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5 (Final
  report)
In-Reply-To: <2BBAEE949D384D40A2B851287ADB6A4304595A6D@eugsrv400.psc.psc
	net.com>
References: <2BBAEE949D384D40A2B851287ADB6A4304595A6D@eugsrv400.psc.pscnet.com>
Message-ID: <7.0.1.0.0.20070109203637.0422acb8@yahoo.com.ar>

At Tuesday 9/1/2007 20:31, Carroll, Barry wrote:

>I've spent about a day investigating our "too many open files" error.  I
>found the following:
>
>         1. Windows XP allows a Python 2.5 script to open 509 concurrent
>            files.

And do you actually need so many open files simultaneously?
Try to close them explicitely when you finish working on them - do 
not rely on GC for closing files. This has *always* been the 
recomended practice (except maybe, inside a short script that 
finishes quickly).
On Python 2.5 you can use the new `with` statement.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From Roland.Puntaier at br-automation.com  Thu Jan 11 03:34:40 2007
From: Roland.Puntaier at br-automation.com (Roland Puntaier)
Date: Thu, 11 Jan 2007 09:34:40 +0100
Subject: Antwort: Re: SubProcess _make_inheritable
In-Reply-To: <7.0.1.0.0.20070111011800.03d03258@yahoo.com.ar>
Message-ID: <OF46962EBA.C1E34E14-ONC1257260.002EFBCC-C1257260.002F1EDF@br-automation.com>

Thanks for pointing me to the tracker.
I've seen there is already an entry for this:
[ 1603907 ] subprocess: error redirecting i/o from non-console process 

Roland

Gabriel Genellina <gagsl-py at yahoo.com.ar> schrieb am 11.01.2007 05:24:03:

> At Wednesday 10/1/2007 13:10, Roland Puntaier wrote:
> 
> >SubProcess.py needs to be patched - at least in 2.4 -  to work from
> >windows GUIs:
> >
> >         def _make_inheritable(self, handle):
> >             """Return a duplicate of handle, which is inheritable"""
> >             if handle==None: handle=-1
> >             return DuplicateHandle(GetCurrentProcess(), handle,
> >                                    GetCurrentProcess(), 0, 1,
> >                                    DUPLICATE_SAME_ACCESS)
> 
> You should submit it to the tracker, not post here and hope someone 
> would notice...
> http://sourceforge.net/tracker/?group_id=5470
> 
> Anyway, I don't see in which case would handle be None.
> 
> 
> -- 
> Gabriel Genellina
> Softlab SRL 
> 
> 
> 
> 
> 
> 
> __________________________________________________ 
> Pregunt?. Respond?. Descubr?. 
> Todo lo que quer?as saber, y lo que ni imaginabas, 
> est? en Yahoo! Respuestas (Beta). 
> ?Probalo ya! 
> http://www.yahoo.com.ar/respuestas 
> 
> 
> 



From ask.me at mail.com  Sun Jan 28 14:04:35 2007
From: ask.me at mail.com (Jammer)
Date: Sun, 28 Jan 2007 14:04:35 -0500
Subject: string byte dump
In-Reply-To: <874pqb9fs1.fsf@smsnet.pl>
References: <9609c$45bce423$d8a87c2a$8428@NEXICOM.NET>
	<874pqb9fs1.fsf@smsnet.pl>
Message-ID: <3ff58$45bcf3c3$d8a87c2a$18333@NEXICOM.NET>

Rob Wolfe wrote:
> Jammer <ask.me at mail.com> writes:
> 
>> Does anyone that knows python want to write me a byte dump for strings? :-)
>>
>> I am trying to modify a plugin (that someone else wrote) that uses
>> interprocess communication.
>> It works on strings without special characters but it fails on other
>> stings like "Bj?rk".
>>
>> It calls decode('utf8') but I guess the strings are not utf8 so I need
>> to find out what is being input.
> 
> Try this:
> 
>>>> "abc".encode("hex")
> '616263'
> 
Awesome, thanks.


From scolnik at fibertel.com.ar  Fri Jan 12 05:37:28 2007
From: scolnik at fibertel.com.ar (scolnik)
Date: Fri, 12 Jan 2007 07:37:28 -0300
Subject: Integer solutions to linear equation?
Message-ID: <001501c73635$a82d0dc0$0200a8c0@scolnik>

http://mathworld.wolfram.com/DiophantineEquation.html

You can use this web application for solving diophantine equations:

http://www.math.uwaterloo.ca/~snburris/htdocs/linear.html

Hugo Scolnik

Imagination is more important than knowledge.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070112/3354a114/attachment.html>

From will at willNOmcguganSPAM.com  Mon Jan  8 11:03:55 2007
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Mon, 08 Jan 2007 16:03:55 +0000
Subject: sys.exit versus raise SystemExit
Message-ID: <45a26b70$0$32019$fa0fcedb@news.zen.co.uk>

Hi,

Is there any difference between calling sys.exit() and raise SystemExit? 
Should I prefer one over the other?

Regards,

Will McGugan
-- 
blog: http://www.willmcgugan.com


From akhavr at kds.com.ua  Tue Jan 16 05:38:48 2007
From: akhavr at kds.com.ua (Andrey Khavryuchenko)
Date: Tue, 16 Jan 2007 12:38:48 +0200
Subject: html + javascript automations = [mechanize + ?? ] or something
	else?
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
Message-ID: <m3lkk3dznr.fsf@netmaster.kds.com.ua>

John,

"J" == John  wrote:

 J> I have to write a spyder for a webpage that uses html + javascript. I
 J> had it written using mechanize but the authors of the webpage now use a
 J> lot of javascript. Mechanize can no longer do the job.  Does anyone
 J> know how I could automate my spyder to understand javascript? Is there
 J> a way to control a browser like firefox from python itself? How about
 J> IE?  That way, we do not have to go thru something like mechanize?

Up to my knowledge, there no way to test javascript but to fire up a
browser.

So, you might check Selenium (http://www.openqa.org/selenium/) and its
python module.

-- 
Andrey V Khavryuchenko            
Software Development Company http://www.kds.com.ua/


From horpner at yahoo.com  Fri Jan 26 13:03:45 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 26 Jan 2007 18:03:45 GMT
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
Message-ID: <slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>

On 2007-01-26, Fabrice DELENTE <fdelente at mail.cpod.fr> wrote:
> I'm trying to display french characters (? -- that's e grave --
> or ? -- agrave) in python 2.5, with the ncurses wrapper that
> comes it, and I can't. My locale is set correctly
> (fr_FR.iso885915), and my terminal (rxvt-unicode) is able to
> display those chars.

What have you tried?

-- 
Neil Cerutti

-- 
Posted via a free Usenet account from http://www.teranews.com



From bdesth.quelquechose at free.quelquepart.fr  Fri Jan 12 17:42:47 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 12 Jan 2007 23:42:47 +0100
Subject: What is a perl hash in python
In-Reply-To: <mailman.2653.1168622715.32031.python-list@python.org>
References: <mailman.2653.1168622715.32031.python-list@python.org>
Message-ID: <45a80882$0$22916$426a34cc@news.free.fr>

Karyn Williams a ?crit :
> I am new to Pyton. I am trying to modify and understand a script someone
> else wrote. I am trying to make sense of the following code snippet. I know
> line 7 would be best coded with regex. I first would like to understand
> what was coded originally. thelistOut looks like a hash to me (I'm more
> familiar with perl).

It's not a hash (the Python type for hashtables is 'dict'), it's a list 
of 2-tuples. FWIW, the dict type can accept such a list as an argument 
to it's constructor - but then you loose the ordering.

Also, the data structure is somewhat weird, since the second item of 
each tuple is always a one-element list.

> Perhaps someone could translate from perl to python

Do you mean "from Python to Perl" ?

> for me - not in code but just in concept.
> 
> 
> Here is the code. This script is reading the list thelistOut and then
> removing any items in RSMlist and taking the remainder and putting them in
> graphAddressOut with the formatting.
> 
> This is a SAMPLE of what is in the lists referenced below in the loop:
> 
> 
> thelistOut = [(632,
> ['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_9.log']), (145,
> ['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_13.log']), (0,
> ['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_5.log'])]
> 
> RSMList = ['172.16.0.1_1', '172.16.0.1_2', '172.16.0.1_3', '172.16.0.1_4',
> '172.16.0.1_5']
> 
> 
> 
> #--------------------------Loop 1 -------------------------
>        
>     w = 0
>     while w < 45:
>        
>        fileOut = string.split(thelistOut[w][1][0],".log")
>        fileOutSplitedCommon = string.split(fileOut[0], "main/")
>        fileOut2D = string.split(fileOutSplitedCommon[1], "/")
>        fileOut = string.split(fileOut[0],"data-dist")
> 
>        if fileOut2D[1] in RSMList:
>           w = w + 1
>           continue
>        graphAddressOut = tag1 + logUrl + fileOut[1] + extention1 + tag2 +
> "<b>SWITCH: " + string.swapcase(fileOut2D[0]) + "&nbsp;&nbsp;&
> nbsp;PORT ID: " + fileOut2D[1] + "</b><br>" + imgTitleTag + imgTag1 +
> logUrl + fileOut[1] + extention2 + imgTag2 + tag3 + tag5
>        outputOut.append(graphAddressOut)
>        strOut = strOut + graphAddressOut
> 
>        w = w + 1
> 
> #--------------------------Loop 1 -------------------------
> 

Yuck. This code stinks. Whoever wrote this ought to be shot down. I 
refuse to try&clean this mess unless I get payed (and well payed).





From george.sakkis at gmail.com  Sun Jan  7 22:57:35 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 7 Jan 2007 19:57:35 -0800
Subject: Recommendations (or best practices) to define functions (or
	methods)
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
Message-ID: <1168228655.184248.113310@v33g2000cwv.googlegroups.com>

vizcayno wrote:

> Hello:
> Need your help in the "correct" definition of the next function. If
> necessary, I would like to know about a web site or documentation that
> tells me about best practices in defining functions, especially for
> those that consider the error exceptions management.
> I have the next alternatives but I think there are better:
>
> Alternative 1:
> =============
> def ExecuteSQL(cmdSQL, cursor):
>     try:
>         cursor.execute(cmdSQL)
>     except Exception, e:
>         return e
>     return 1
>
> Seems a good solution but the function is not returning an uniform
> type, should the code that receives the function result decides the
> error display according of datatype? If I do this in C# I think I will
> have problems.
>
>
> Alternative 2:
> =============
> def ExecuteSQL(cmdSQL, cursor):
>     try:
>         cursor.execute(cmdSQL)
>     except Exception, e:
>         return 0, e   # or return (0,e.message)
>     return 1, "ok"    # or return (1, "ok")
> Sounds good, but seems forced. When doing return 1, "ok" I am doing
> redundancy and I have problems with the type (e is exception type and
> "ok" is string).
>
>
> Alternative 3:
> =============
> def ExecuteSQL(cmdSQL, cursor):
>     try:
>         cursor.execute(cmdSQL)
>     except Exception, e:
>         print "ERROR:", e
>         return 0
>     return 1
>
> It solves the problem of alternative 1 and 2, but the print keyword
> would have problems if the function is called from an WEB or GUI
> application and, because there are plans to convert print into a
> function in py3k.
>
>
> Alternative 4:
> =============
> def ExecuteSQL(cmdSQL, cursor):
>     try:
>         cursor.execute(cmdSQL)
>     except Exception, e:
>         print >> logerr, e.message
>         return 0
>     return 1
>
> Seems a good solution but I should always be persuaded to have an open
> global file (logerr) when invoking this function; otherwise code will
> generate another error. The function is not totally independent.I think
> I would be in the same situation when using the "logging" battery.
>
> Thanks for your attention.
>
> Regards,

My vote goes to None Of The Above. In neither alternative you actually
do anything useful with the exception other than reporting it in some
ad-hoc way. If that's all you can and/or want to do with it (i.e. no
error recovery of some sort), the typical thing to do is nothing; just
let it propagate up the call stack until the appropriate level. This
might be the console, a GUI, a logfile, an automatically sent email or
any combination of these or more. If it's a programmer's error (aka
bug), it should propagate all the way up and end in printing the stack
trace.

The bottom line is, it's simply not this function's (ExecuteSQL) job to
deal with the error, so it shouldn't. Most important, returning an
error or status code is rarely (if ever) desirable or necessary in
Python; that's what exceptions are for.

George



From bjourne at gmail.com  Fri Jan 19 04:38:33 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Fri, 19 Jan 2007 10:38:33 +0100
Subject: Is it possible to fasten the import of cgi?
In-Reply-To: <45af6f47$0$322$e4fe514c@news.xs4all.nl>
References: <45af6f47$0$322$e4fe514c@news.xs4all.nl>
Message-ID: <740c3aec0701190138m41b29099tacd2bd7d5f386ea9@mail.gmail.com>

On 1/18/07, Cecil Westerhof <dummy at dummy.nl> wrote:
> I have a cgi-script dat uses the modules cgi, os, sys and time. Offcourse I
> can not time the time used to import time, but os and sys do not take more
> as a millisecond. My script itself takes 3 or 4 milliseconds. But importing
> cgi takes 95 milliseconds. (This is on my test system a PII 300 MHz. Is
> there a way to make this more fast? The import off cgi makes the script at
> least 20 times as slow. Something like mod-python is not a possibility. I
> could use it on my test machine, but not at the osting provider.

Maybe python-launcher-daemon can help you?
http://blogs.gnome.org/view/johan/2007/01/18/0 But if you can not use
mod_python then you probably can not use any long running processes
either.

-- 
mvh Bj?rn


From kylotan at gmail.com  Fri Jan 12 05:05:13 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 12 Jan 2007 02:05:13 -0800
Subject: How to modify object attribute by python C API
In-Reply-To: <1168551428.114028.278940@77g2000hsv.googlegroups.com>
References: <1168551428.114028.278940@77g2000hsv.googlegroups.com>
Message-ID: <1168596313.853805.148790@v45g2000cwv.googlegroups.com>

Huayang Xia wrote:

>     PyObject* py_obj_attr1 = PyObject_GetAttrString(obj, "attr1");
>     PyObject_SetAttrString(py_obj_attr1, "attr2",
> PyString_FromString("a"));
>     Py_DECREF(py_obj_attr1);
>
> The object py_obj_attr1 is said to be a "New reference". It's
> confusing, does it refer to the same object as "obj.attr1" in python's
> term?

Yes, it refers to the same object. Each object can have many
references, and is deleted when all the references are gone. The new
reference in this case means that Python has taken note that there's a
new use of that object - your C code. It means it won't delete that
object, even if no more Python code refers to it, because it knows your
C code holds a reference to it. Therefore, when your C code no longer
needs to access the object, you call Py_DECREF.

-- 
Ben Sizer



From weekender_ny at yahoo.com  Sun Jan 21 23:47:59 2007
From: weekender_ny at yahoo.com (John)
Date: 21 Jan 2007 20:47:59 -0800
Subject: html + javascript automations = [mechanize + ?? ] or something
	else?
In-Reply-To: <Xns98BA77047A4C8duncanbooth@127.0.0.1>
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
	<Xns98BA77047A4C8duncanbooth@127.0.0.1>
Message-ID: <1169441279.556814.16770@38g2000cwa.googlegroups.com>



My python2.5 installation on windows did not come with "win32com".
How do I install/get this module for windows?

Thanks,
--j

Duncan Booth wrote:
> "John" <weekender_ny at yahoo.com> wrote:
>
> > Is there a way
> > to control a browser like firefox from python itself? How about IE?
>
> IE is easy enough to control and you have full access to the DOM:
>
> >>> import win32com
> >>> win32com.client.gencache.EnsureModule('{EAB22AC0-30C1-11CF-A7EB-
> 0000C05BAE0B}', 0, 1, 1)
> <module 'win32com.gen_py.EAB22AC0-30C1-11CF-A7EB-0000C05BAE0Bx0x1x1' from
> 'C:\Python25\lib\site-packages\win32com\gen_py\EAB22AC0-30C1-11CF-A7EB-
> 0000C05BAE0Bx0x1x1.py'>
> >>> IE = win32com.client.DispatchEx('InternetExplorer.Application.1')
> >>> dir(IE)
> ['CLSID', 'ClientToWindow', 'ExecWB', 'GetProperty', 'GoBack', 'GoForward',
> 'GoHome', 'GoSearch', 'Navigate', 'Navigate2', 'PutProperty',
> 'QueryStatusWB', 'Quit', 'Refresh', 'Refresh2', 'ShowBrowserBar', 'Stop',
> '_ApplyTypes_', '__call__', '__cmp__', '__doc__', '__getattr__',
> '__init__', '__int__', '__module__', '__repr__', '__setattr__', '__str__',
> '__unicode__', '_get_good_object_', '_get_good_single_object_', '_oleobj_',
> '_prop_map_get_', '_prop_map_put_', 'coclass_clsid']
> >>> IE.Visible=True
> >>> IE.Navigate("http://plone.org")
> >>> while IE.Busy: pass
>
> >>> print IE.Document.getElementById("portlet-news").innerHTML
> <DT class=portletHeader><A class="feedButton link-plain"
> href="feed://plone.org/news/newslisting/RSS"><IMG title="RSS subscription
> feed for news items" alt=RSS src="http://plone.org/rss.gif"> </A><A
> href="http://plone.org/news">News</A> </DT>
>
> ... and so on ...
>
>
> See
> http://msdn.microsoft.com/workshop/browser/webbrowser/reference/objects/int
> ernetexplorer.asp
> for the documentation.



From basti.wiesner at gmx.net  Sun Jan  7 13:14:41 2007
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sun, 07 Jan 2007 19:14:41 +0100
Subject: AES256 in PyCrypto
References: <1168134542.337448.261510@s34g2000cwa.googlegroups.com>
	<pan.2007.01.07.10.30.53.653351@gmx.net>
	<1168184060.548851.11540@i15g2000cwa.googlegroups.com>
Message-ID: <enrdah$k40$02$1@news.t-online.com>

[ mirandacascade at yahoo.com <mirandacascade at yahoo.com> ]

> 
> Marc 'BlackJack' Rintsch wrote:
> 
>> `a` must be of length 32 for AES256.  And the length of `plainText`
>> must be a multiple of 16 because it's a block cypher algorithm.
> 
> Thank you.  I have some follow up questions and 1 tangential question.
> 
> Follow up question:
> Would it be correct to infer that:
>  a) the AES.pyd extension module (plus whatever additional files
>  within the PyCrypto package that it uses) has the capability to
>  perform AES256 encryption?
>  b) the AES256 encryption happens based on the characteristics of the
> input to the new() method...if the first argument has a length of 32,
> the result will be AES256-style encryption?

Since you are apparently unable to read to docstrings of this module, I
will give you a short hint: yes, pycrypto supports AES with 256 bit
keys.

>  c) will AES256-style encryption also happen if the first argument to
> the new() method has a length that is a multiple of 32, e.g. 64?

Why didn't you try this? It would have answered your question:

[12]--> AES.new(os.urandom(64), AES.MODE_CBC, os.urandom(16))
---------------------------------------------------------------------------
exceptions.ValueError                                Traceback (most
recent call last)

/home/lunar/<ipython console>

ValueError: AES key must be either 16, 24, or 32 bytes long

 
> Tangential question:
> Is there functionality available (either in the PyCrypto package or
> some other package) that generates an initialization vector that can
> be used as input to the new() method?  What prompts this question is
> that the original posting referenced a snippet of C# code; some other
> related snippets I saw seemed to suggest that:
> a) a RijndaelManaged() class gets instantiated
> b) that class has a GenerateIV() method which appears to populate
> someting in a IV property
> c) the application that was employing the AES256 encryption made use
> of the left-most 16 characters of the IV property
> So, I was curious whether something analgous exists in the Python
> world.

os.urandom will be your friend...

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 27 00:42:11 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 27 Jan 2007 16:42:11 +1100
Subject: instancemethod
References: <mailman.2961.1169417800.32031.python-list@python.org>
	<45b51298$0$8289$426a74cc@news.free.fr>
	<ef60af090701221255m575701e7jaae6bd858acbea5c@mail.gmail.com>
	<dea92f560701230608p469d5937ya658e2bb234c4941@mail.gmail.com>
	<mailman.3041.1169586704.32031.python-list@python.org>
	<45ba2b72$0$3007$426a34cc@news.free.fr>
	<pan.2007.01.27.00.07.59.387012@REMOVE.THIS.cybersource.com.au>
	<mailman.3223.1169870636.32031.python-list@python.org>
Message-ID: <pan.2007.01.27.05.42.11.276646@REMOVE.THIS.cybersource.com.au>

On Sat, 27 Jan 2007 01:03:50 -0300, Gabriel Genellina wrote:

> "Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> escribi? en el 
> mensaje 
> news:pan.2007.01.27.00.07.59.387012 at REMOVE.THIS.cybersource.com.au...
> 
>> On Fri, 26 Jan 2007 17:25:37 +0100, Bruno Desthuilliers wrote:
>>>>    def __del__(self):
>>>>        try:
>>>>            self.close()
>>>>        finally:
>>>>            pass
>>>>        except:
>>>>            pass
>>>
>>> The finally clause is useless here.
>>
>> In principle, closing a file could raise an exception. I've never seen it
>> happen, but it could. From the Linux man pages: [...]
>> I assume that the same will apply in Python.
> 
> Note that he said that the *finally* clause were useless (and I'd say so, 
> too), not the *except* clause.

Doh!

Yes, he's right. Worse, the code as show can't possibly work: the finally
clause must come AFTER the except clause.

>>> try:
...     pass
... finally:
...     pass
... except:
  File "<stdin>", line 5
    except:
         ^
SyntaxError: invalid syntax



-- 
Steven.



From http  Sat Jan 13 16:53:04 2007
From: http (Paul Rubin)
Date: 13 Jan 2007 13:53:04 -0800
Subject: Threaded for loop
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
Message-ID: <7xr6ty8ugv.fsf@ruckus.brouhaha.com>

"John" <weekender_ny at yahoo.com> writes:
> I want to do something like this:
> 
> for i = 1 in range(0,N):
>  for j = 1 in range(0,N):
>    D[i][j] = calculate(i,j)
> 
> I would like to now do this using a fixed number of threads, say 10
> threads. What is the easiest way to do the "parfor" in python?

It won't help in terms of actual parallelism.  Python only lets one
thread run at a time, even on a multi-cpu computer.  


From mike.klaas at gmail.com  Thu Jan  4 14:24:19 2007
From: mike.klaas at gmail.com (Klaas)
Date: 4 Jan 2007 11:24:19 -0800
Subject: Set type?
In-Reply-To: <mailman.2294.1167937069.32031.python-list@python.org>
References: <1167936480.882357.277320@v33g2000cwv.googlegroups.com>
	<mailman.2294.1167937069.32031.python-list@python.org>
Message-ID: <1167938659.079359.267300@11g2000cwr.googlegroups.com>


Fredrik Lundh wrote:

> > if type(var) is types.SetType:
> >    blah
> >
> > but that is not available in types module.  I am using 2.4
>
>      # set or subclass of set
>      if isinstance(var, set):
>          ...

or
if isinstance(var, (set, frozenset)):
   ...

-Mike



From pgarrone at acay.com.au  Sat Jan 20 01:46:53 2007
From: pgarrone at acay.com.au (pgarrone at acay.com.au)
Date: 19 Jan 2007 22:46:53 -0800
Subject: Py 2.5 on Language Shootout
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>
	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>
	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>
Message-ID: <1169275613.093797.67320@v45g2000cwv.googlegroups.com>

Isaac Gouy wrote:
> pgarrone at acay.com.au wrote:
> > Alioth is a great site for selecting the language in which to implement
> > primitives. Usually it's C.
>
> And for selecting a language for which you might need to implement
> primitives in C :-)

Well if you like C so much, just do it in C. ":-)"

>
> >
> > Two of the alioth benchmarks, Partial-sums and Spectral-norm, could be
> > done using Numarray, or would be done with Numarray if most of the
> > program was in Python and there was a need to implement a similar
> > numerical procedure. The speed would be up near the compiled language
> > benchmarks. However the specific wording of these benchmarks prohibits
> > this approach. Spectral-norm must pretend the dataset is infinite, and
> > Partial-sums has to be implemented in a simple dumb loop.
>
> And we wouldn't use a na?ve recursive algorithm to find fibonnaci
> numbers ... unless we were interested in recursion for its own sake.
>
> Maybe the author of spectral-norm was interested in function calls.
> Maybe the author of partial-sums was interested in simple dumb loops
> and simple dumb Math.

I am not disputing this. I think you take my point though.

>
>
> > Looking over the benchmarks, one gains the impression that Python is a
> > slow language.
>
> What does that even mean - a slow language?
>

The alioth benchmarks provide a set of numbers by which
languages may be compared.

>
> > My first serious Python programming exercise involved converting a 900
> > line Bash Shell program to a 500 line Python program, with a speedup
> > factor of 17. Using Python allowed an OO structure and advanced
> > containers, meaning the program was more maintainable and portable,
> > which were the main aims of the exercise. The speedup was a surprising
> > and welcome side benefit. I think it was mosly because the Python
> > byte-code interpreter is probably an order of magnitude faster than
> > Bash's direct interpretation, and because in Python system calls to
> > recurse directories and create symbolic links were not forked to
> > separate processes. In fact I would guess that the overall speed of the
> > Python program would be little less than a C program, given that most
> > of the time would be spent in system calls.
>
> /I would guess/

I don't have the time, or interest, to recode it in C to find out.
In reality the choice would be C++ because of OO and STL.
Perhaps traversing and linking a tree containing about 1000 files would
not
take a full second. I might be wrong. All i know is, its a lot faster
than Bash.

>
> > Its almost possible to make a large Python program arbitrarily fast by
> > profiling it and implementing slow bits as primitives. Size is probably
> > of greater concern.
>
> We could read that simply as - /it's not possible/ to make a large
> Python program arbitrarily fast. Is that what you meant?

No. I meant that if my Python program is too big in terms of its
execution memory
requirements, then that would be a difficult issue to deal with. Rather
than
optimizing execution hotspots, I might have to use another language.

Cheers,
 P.S. Alioth is a great site.



From bignose+hates-spam at benfinney.id.au  Mon Jan 15 22:48:40 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 16 Jan 2007 14:48:40 +1100
Subject: Conflicting needs for __init__ method
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<mailman.2741.1168898073.32031.python-list@python.org>
	<pan.2007.01.16.03.02.03.4711@REMOVEME.cybersource.com.au>
Message-ID: <874pqr7ht3.fsf@benfinney.id.au>

"Steven D'Aprano" <steve at REMOVEME.cybersource.com.au> writes:

> On Tue, 16 Jan 2007 08:54:09 +1100, Ben Finney wrote:
> >         def __add__(self, other):
> >             result = perform_addition(self, other)
> >             return result
>
> But that could just as easily be written as:
>
>     def __add__(self, other):
>         return perform_addition(self, other)

Yes. I was merely suggesting that there would probably be more steps
involved than "return some_simple_expression", without actually
detailing those steps.

-- 
 \     "Having sex with Rachel is like going to a concert. She yells a |
  `\      lot, and throws frisbees around the room; and when she wants |
_o__)                     more, she lights a match."  -- Steven Wright |
Ben Finney



From smusnmrNOSPAM at yahoo.com  Mon Jan 15 09:00:09 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Mon, 15 Jan 2007 15:00:09 +0100
Subject: python and MOV or MPEG
References: <eoffha$epe2$1@zam602.zam.kfa-juelich.de>
	<510uf3F1i9oo6U1@mid.uni-berlin.de>
	<eofo2d$eqr9$1@zam602.zam.kfa-juelich.de>
	<511ehiF1i1c86U1@mid.individual.net>
Message-ID: <eog1db$ese7$1@zam602.zam.kfa-juelich.de>

"Bjoern Schliessmann" wrote:

> 1.3? I've found both for 2.4, and in one site's forum some guy
> offers windows binaries for 2.5.

The links, please!

Thank you,

siggi


"Bjoern Schliessmann" <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> schrieb 
im Newsbeitrag news:511ehiF1i1c86U1 at mid.individual.net...
> siggi wrote:
>
>> Thanks, Diez.  I forgot to mention that I am learning Python with
>> python 2.5 on WinXP. And both pymedia and pygame require somewhat
>> older versions of python, 1.3 and 2.4, respectively.
>
> 1.3? I've found both for 2.4, and in one site's forum some guy
> offers windows binaries for 2.5.
>
> Regards,
>
>
> Bj?rn
>
> -- 
> BOFH excuse #303:
>
> fractal radiation jamming the backbone
> 




From jeremit0 at gmail.com  Thu Jan  4 21:52:03 2007
From: jeremit0 at gmail.com (jeremito)
Date: 4 Jan 2007 18:52:03 -0800
Subject: What is proper way to require a method to be overridden?
Message-ID: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>

I am writing a class that is intended to be subclassed.  What is the
proper way to indicate that a sub class must override a method?

Thanks,
Jeremy



From gblais at cox.net  Sun Jan  7 17:43:11 2007
From: gblais at cox.net (gblais at cox.net)
Date: Sun, 7 Jan 2007 22:43:11 GMT
Subject: Working with Excel inside Python
References: <1168205727.130771.257030@51g2000cwl.googlegroups.com>
Message-ID: <LHeoh.407$uL1.363@newsfe22.lga>

Or, you might want to look at two packages:

xlrd

pyExcelerator

The first can "read" .xls files, and the second can write them.  I've had
great results with both.

Gerry


From wolf_tracks at invalid.com  Sun Jan 21 15:34:02 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sun, 21 Jan 2007 20:34:02 GMT
Subject: Beginners Tutorial in PDF Format?
Message-ID: <_6Qsh.51414$wc5.5373@newssvr25.news.prodigy.net>

I'd like to print a tutorial in one fell swoop, but it seems most on the 
various sites are page by page embedded descriptions in the page. Any 
available as a pdf?

          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

                Two laws Newton and Einstein didn't discover:
                  1. Time is money.
                  2. Matter will be damaged in direct proportion
                     to its value.
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From mensanator at aol.com  Tue Jan 16 18:47:32 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: 16 Jan 2007 15:47:32 -0800
Subject: I wrote a C++ code generator in Python,
	would anyone please help me to review the code? :)
In-Reply-To: <1168930067.970099.164620@s34g2000cwa.googlegroups.com>
References: <1168930067.970099.164620@s34g2000cwa.googlegroups.com>
Message-ID: <1168991250.445208.159020@v45g2000cwv.googlegroups.com>


Kevin Wan wrote:
> fgen is a free command line tool that facilitates cross platform c++
> development, including header generation, cpp file generation, makefile
> generation, unit test framework generation, etc.
>
> http://sf.net/projects/fgen
>
> I'm not very familiar with Python. Any feedback are appreciated!

No documentation?

Am I supposed to reverse engineer all the source files to figure out
how I'm
supposed to use it?

> Or
> anyone like to develop it with me?
> 
> Thanks.



From mirandacascade at yahoo.com  Sun Jan 14 22:50:06 2007
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 14 Jan 2007 19:50:06 -0800
Subject: on which site or Usenet group should this question be posted?
Message-ID: <1168833006.078282.46430@11g2000cwr.googlegroups.com>

Operating system: Win XP
Version of Python: 2.4

I recognize that this question is not about Python...it has only a
tangential Python connection.  I'm using a Python package to run a
process; that process is issuing an error, and I'm hoping that someone
on this site can point me to the site that has the appropriate
expertise.

Situation is this:
1) using win32com.client.Dispatch to work with the MSXML2.XMLHTTP COM
object
2) I use the open() method of the COM object and specify a "POST", then
I use the send() method of the COM object
3) when the url is an http url, able to send and then check the
responseText property without problems
4) when the url is an https url, the open() method works, but when the
send() method is invoked, it raises an exception with the error
message: "the download of the specified resource has failed"
5) when I use Google with searches such as "XMLHTTP", "https",
"download of the specified resource", I see that other people are
experiencing the issue, but I didn't see any solutions, nor did I see
whether there was a site (perhaps a Usenet group) on which it would
make sense to post this issue

Eventually, I want to learn whether the XMLHTTP COM object can work
with https url's, but what I'm hoping to learn from this post is advice
as to which site I should post this question so that it might be read
by folks with the appropriate subject-matter expertise.

Thank you.



From dingbat at codesmiths.com  Fri Jan  5 10:34:25 2007
From: dingbat at codesmiths.com (Andy Dingley)
Date: 5 Jan 2007 07:34:25 -0800
Subject: program deployment
In-Reply-To: <1168010377.179056.220500@s80g2000cwa.googlegroups.com>
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
	<12psqtppgi5cme6@corp.supernews.com>
	<1168010377.179056.220500@s80g2000cwa.googlegroups.com>
Message-ID: <1168011265.016893.207830@42g2000cwt.googlegroups.com>

king kikapu wrote:

> > > Are they embarassed by their code?
>
> hehehe...no, just worried about stealing their ideas...

Ever heard of "Open Source" ?  I do better by letting other people
steal my ideas (and stealing theirs too) than I'd ever do by keeping
things secret.



From steve at holdenweb.com  Wed Jan 24 09:21:16 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 24 Jan 2007 14:21:16 +0000
Subject: OT Annoying Habits (Was: when format strings attack)
In-Reply-To: <2BBAEE949D384D40A2B851287ADB6A4304595A96@eugsrv400.psc.pscnet.com>
References: <2BBAEE949D384D40A2B851287ADB6A4304595A96@eugsrv400.psc.pscnet.com>
Message-ID: <ep7q0v$g09$1@sea.gmane.org>

Carroll, Barry wrote:
> Greetings:
> 
> Personally, I don't think top-posting is the most annoying newsgroup
> habit.  I think it's making a big fuss about minor inconveniences.  
> 
> One of the nicest things about being human is the amazing flexibility of
> our brains.  For example, if a block of text isn't arranged in the order
> we're used to, we can easily rearrange it mentally and read it anyway.
> Oriental and Arabic peoples, for example, do this each time they read
> something written in English.  It's EASY, once you get used to it!
> 
That's as may be. but just last week I was presented with a printed 
five-page message where all contributors to the thread had top-posted. 
There were four and five levels of quoting in some places, line wrapping 
was all over the place as a result, and it was difficult to even make 
out which bits were quoted at the same level.

If everyone had refrained from top-posting then it would have been much 
easier to read the ensuing (linear) conversation. In short: top-posting 
doesn't hurt in simple cases, but it's a real hurdle to understanding in 
the long-running threads typically generated on mailing lists and 
newsgroups.

There are many people who find it natural to consider their own 
convenience over that of hundreds or thousands of others, so by all 
means continue with your top-posting habit if it's too much trouble to 
avoid it. It's unlikely to get you killed, but it *does* say something 
about you, and people will draw conclusions, possibly incorrect ones, 
about you as a result.

As a final riposte, our personal opinions aren't really much of a guide 
to the wishes of the masses, whereas the reaction of the masses (as in: 
"Why do you top-post?") often is. How often do you see someone ask 
"please start top-posting"? I've had precisely one such request in many 
many years of email and Internet usage.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From http  Thu Jan 25 07:29:35 2007
From: http (Paul Rubin)
Date: 25 Jan 2007 04:29:35 -0800
Subject: free variables /cell objects question
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com>
	<1169563580.634000.122540@v45g2000cwv.googlegroups.com>
	<mailman.3047.1169599631.32031.python-list@python.org>
	<1169725374.504546.153890@v33g2000cwv.googlegroups.com>
Message-ID: <7xirevuw5s.fsf@ruckus.brouhaha.com>

"gangesmaster" <tomerfiliba at gmail.com> writes:
> what i see as a bug is this code not working as expected:
> 
> >>> def make_foos(names):
> ...     funcs = []
> ...     for n in names:
> ...             def foo():
> ...                     print "my name is", n
> ...             funcs.append(foo)
> ...     return funcs

But it does work as expected, if your expectations are based on what
closures actually do.

> i have to create yet another closure, make_foo, so that the name
> is correctly bound to the object, rather than the frame's slot:

The Python idiom is:

   def make_foos(names):
       funcs = []
       for n in names:
               def foo(n=n):
                       print "my name is", n
               funcs.append(foo)
       return funcs

The n=n in the "def foo" creates the internal binding that you need.


From free.condiments at gmail.com  Sun Jan 21 16:00:13 2007
From: free.condiments at gmail.com (Sam)
Date: Sun, 21 Jan 2007 21:00:13 +0000
Subject: Accessing class variables in staticmethods.
In-Reply-To: <1169412557.737589.105120@a75g2000cwd.googlegroups.com>
References: <1169412557.737589.105120@a75g2000cwd.googlegroups.com>
Message-ID: <b1c02c610701211300g48119465n7399fac519d6ee70@mail.gmail.com>

On 21 Jan 2007 12:49:17 -0800, Ramashish Baranwal
<ramashish.lists at gmail.com> wrote:
> class Base:
>     staticvar = 'Base'
>
>     @staticmethod
>     def printname():
>         # this doesn't work
>         # print staticvar
>         # this does work but derived classes wouldn't behave as I want
>         print Base.staticvar
>
> class Derived(Base):
>     staticvar = 'Derived'
>
> Base.printname() # should print 'Base'
> Derived.printname() # should print 'Derived'
>
> Any idea on how to go about this? Also from a staticmethod how can I
> find out other attributes of the class (not objects)? Do static methods
> get some classinfo via some implicit argument(s)?

No, staticmethods get told nothing about the class they're being
defined in. What you want is a classmethod, which gets passed the
class to work with.

Using classmethods, your code becomes:

#untested, bear in mind
class Base:
    staticvar = 'Base'

    @classmethod
    def printname(cls):
        print cls.staticvar

class Derived(Base):
    staticvar = 'Derived'

Base.printname() #prints 'Base'
Derived.printname() #prints 'Derived'

Incidentally, you can also use cls.__name__ for this purpose, but I
guess that your actual motivation for this is more complicated than
class names.


From exarkun at divmod.com  Sun Jan 28 16:08:13 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sun, 28 Jan 2007 16:08:13 -0500
Subject: Trouble with max() and __cmp__()
In-Reply-To: <1170017167.165222.325800@a34g2000cwb.googlegroups.com>
Message-ID: <20070128210813.25807.693766372.divmod.quotient.1623@ohm>

On 28 Jan 2007 12:46:07 -0800, Thomas Nelson <thn at mail.utexas.edu> wrote:
>My code:
>
>class Policy(list):
>    def __cmp__(self,other):
>        return cmp(self.fitness,other.fitness)
>
>j = Policy()
>j.fitness = 3
>k = Policy()
>k.fitness = 1
>l = Policy()
>l.fitness = 5
>print max([j,k,l]).fitness
>
>prints 3, when I was expecting it to print 5.  What have I done wrong?
>

max() uses >, apparently.  Which means the builtin list.__gt__ is consulted,
not your __cmp__ implementation:

    >>> class x(list):
    ...     def __cmp__(self, other):
    ...             print 'yes'
    ...             return 1
    ...
    >>> max([x(), x(), x()])
    []
    >>> class y(list):
    ...     def __lt__(self, other):
    ...             print 'yes'
    ...             return cmp(id(self), id(other))
    ...
    >>> max([y(), y(), y()])
    []
    >>> class z(list):
    ...     def __le__(self, other):
    ...             print 'yes'
    ...             return cmp(id(self), id(other))
    ...
    >>> max([z(), z(), z()])
    []
    >>> class w(list):
    ...     def __ge__(self, other):
    ...             print 'yes'
    ...             return cmp(id(self), id(other))
    ...
    >>> max([w(), w(), w()])
    []
    >>> class v(list):
    ...     def __gt__(self, other):
    ...             print 'yes'
    ...             return cmp(id(self), id(other))
    ...
    >>> max([v(), v(), v()])
    yes
    yes
    []

Note that this is different from the operation used by list.sort():

    >>> [v(), v(), v()].sort()
    >>> [w(), w(), w()].sort()
    >>> [x(), x(), x()].sort()
    >>> [z(), z(), z()].sort()
    >>> [y(), y(), y()].sort()
    yes
    yes
    >>>

So, if you implement __gt__, max will work right.  If you also implement
__le__, sorting will work right.  Your best bet is probably to implement
all of the rich comparison methods.

Jean-Paul


From mnations at gmail.com  Mon Jan  8 16:56:28 2007
From: mnations at gmail.com (Mudcat)
Date: 8 Jan 2007 13:56:28 -0800
Subject: Getting started with Crystal Reports...little help in the far court.
Message-ID: <1168293388.349793.256790@s80g2000cwa.googlegroups.com>

I am not that familiar with Crystal Reports, but having read some other
posts I know that the way to integrate the API with Python is through
the COM interface provide by win32all.

However, I have been unable to find any other information on how to get
started. I've used the COM interface before in integrating Excel and a
couple of other things. So I am familiar with how that works. But there
are at least 40 options dealing with Crystal and Business Objects. I
have no idea which makepy file to create or which one provides the
functionality I need.

I'm not looking to do much. All I'm really trying to do is provide one
application where a list of crystal reports can be selected and ran in
series. Right now we have a lot of reports that all have to be run
manually (takes a while). So I think all I need api access to is server
selection, parameter selection, and output formats.

Any pointers in the right direction would be helpful.

Thanks,
Marc



From bluejump at mac.com  Sat Jan 13 12:35:39 2007
From: bluejump at mac.com (Kajsa Anka)
Date: Sat, 13 Jan 2007 18:35:39 +0100
Subject: HTML Calendar code
Message-ID: <0001HW.C1CED6FB000CC50DF0407648@News.Individual.DE>

Before I re-invent something I would like to ask if there exists some code 
that can be used for create the HTML code for a calendar which I then can 
include on a web page. 

The module in the standard library can create a calendar but I would like 
display my schedule. 

My idea is that it would read a simple text file and then create a weekly 
calendar view (and/or a monthly) with my schedule.

Does some the code for this exist? (the ones I found all created calendars 
but doesn't seem to include any schedule)

					jem



From nmm1 at cus.cam.ac.uk  Fri Jan 19 11:19:08 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 19 Jan 2007 16:19:08 GMT
Subject: when format strings attack
References: <1169207467.989977.162940@q2g2000cwa.googlegroups.com>
	<mailman.2908.1169221530.32031.python-list@python.org>
Message-ID: <eoqr1s$khg$1@gemini.csx.cam.ac.uk>


In article <mailman.2908.1169221530.32031.python-list at python.org>,
"Gabriel Genellina" <gagsl-py at yahoo.com.ar> writes:
|> <Eric_Dexter at msn.com> escribi? en el mensaje 
|> news:1169207467.989977.162940 at q2g2000cwa.googlegroups.com...
|> 
|> > http://www.ddj.com/184405774;jsessionid=BDDEMUGJOPXUMQSNDLQCKHSCJUNN2JVN
|> >
|> > I saw a warning from homeland security about this.  I only comment on
|> > the because I am trying to use os.system('command1 arg') and it doesn't
|> > work but I do see examples with % that is borrowed from the c language.
|> > Seems like if I can write a batch file that does something the same
|> > behavior should happen in the os module..
|> 
|> Pure Python programs are not affected, but a review of the C implementation 
|> should be made to see if any (variant of) printf is used without a proper 
|> format. Anyway I doubt you could find something, because the vulnerability 
|> is so well known for ages.

Not really.  There are LOTS of vulnerabilities that have been known
for ages and are still legion.  The reason that this is unlikely is
that it is both easy to spot and trivial to fix.


Regards,
Nick Maclaren.


From Who at yakindasorta  Tue Jan 30 23:23:00 2007
From: Who at yakindasorta (Tommy)
Date: Tue, 30 Jan 2007 20:23:00 -0800
Subject: Bush,
	clean up your shit and farts before you leave - Hillary Clinton
References: <1170116661.078191.238840@k78g2000cwa.googlegroups.com>
Message-ID: <HKidnQiv4fwkgF3YnZ2dnUVZ_uiknZ2d@wavecable.com>

I' m not a Bush or Hillary fan, but this strikes me as pretty funny.
Hillary: I'm not for any fixed date, as long as it's before the 2008 
election.
Dammit, George, I don't want Iraq to be a campaign issue!

<thermate at india.com> wrote in message 
news:1170116661.078191.238840 at k78g2000cwa.googlegroups.com...
> But Bush was merely an ego front for the neocons ... He spoke their
> speeches, signed their recommendations, and ordered their wars, go and
> listen to Benjamin Friedman's excellent video in his very passionate
> voice ...
>
> http://video.google.com/videoplay?docid=3552214685532803163&q
>
>
> ====================================================
> http://www.nydailynews.com/front/story/492891p-415149c.html
>
> Hil to W: Clean up your own mess
> Leaving it to next Prez is irresponsible, she tells Iowa crowd
>
> BY MICHAEL McAULIFF
> DAILY NEWS WASHINGTON BUREAU
>
> Hillary Clinton addresses crowd at town-hall style meeting yesterday
> in Davenport, Iowa. Her two-day swing through Iowa, where she hit hard
> on issues like Iraq war and health care, was first trip to state with
> earliest caucus since announcing presidential candidacy.
> DAVENPORT, Iowa - President Bush should clean up the mess he made in
> Iraq and bring American troops home before he leaves the White House
> in 2009, Sen. Hillary Clinton said yesterday.
>
> Clinton fired her rhetoric-raising broadside at Bush and the Iraq war
> on her first swing through Iowa as a presidential hopeful, painting
> herself as tough, warm and presidential all at the same time.
>
> "The President has said this is going to be left to his successor,"
> she said at a rally in Davenport. "I think it's the height of
> irresponsibility, and I really resent it.
>
> "This was his decision to go to war; he went with an ill-conceived
> plan, an incompetently executed strategy, and we should expect him to
> extricate our country from this before he leaves office," the former
> First Lady said.
>
> White House spokesman Rob Saliterman criticized Clinton (D-N.Y.) for
> "a partisan attack that sends the wrong message to our troops and the
> Iraqi people."
>
> One questioner challenged Clinton to explain her vote in late 2002 to
> authorize the war. She said Congress was "misled" at the time by the
> President.
>
> "He took the authority that I and others gave him, and he misused it,"
> she said. "And I regret that deeply. And if we had known then what we
> know now, there never would have been a vote, and I never would have
> voted to give this President that authority."
>
> Dawn Trettin, 33, and her son Ramon Briones, 18, who has joined the
> Army, said they liked what they heard from Clinton. Trettin, though,
> teared up when someone in the crowd told her son not to go to Iraq.
>
> "I don't want to just pull out and leave it in chaos," she said,
> though she was waiting to make up her mind on whom to vote for next
> year.
>
> Her son, who said he liked Clinton's depth, was ready to commit after
> hearing her pitch. "I liked her," he said. "I would vote for her."
>
> Clinton is leading her Democratic rivals in national polls, but she is
> not the front-runner in Iowa. If Iowa's first-in-the-nation caucus was
> held now, she would lose to 2004 vice presidential nominee John
> Edwards. She also trails former Iowa Gov. Tom Vilsack and Illinois
> Sen. Barack Obama in state polls.
>
> She completed a two-day swing through the state last night in a bid to
> close the gap and tried to erase the perception among many Iowans that
> she can't win, talking to them in small groups in living rooms and by
> the thousands in large halls.
>
> The reception was strong, and Camp Clinton liked what it saw.
>
> "We are thrilled with the weekend," said Clinton spokesman Howard
> Wolfson.
>
> Clinton also focused on middle-class issues like making college more
> affordable and obtaining universal health care coverage.
>
> She promised to try to at least get universal coverage for kids during
> her next two years in the Senate.
>
> Today, she's picking up the war theme theme again in Texas, attending
> the dedication of Brooke Army Medical Center's $50 million Center for
> the Intrepid. The 60,000-square-foot physical rehabilitation center is
> for veterans injured in the war.
>
> Originally published on January 28, 2007
> 




From codecraig at gmail.com  Wed Jan 31 07:44:21 2007
From: codecraig at gmail.com (abcd)
Date: 31 Jan 2007 04:44:21 -0800
Subject: marshal.loads ValueError
Message-ID: <1170247461.799295.227550@a75g2000cwd.googlegroups.com>

I have the following code which is sent over the wire as a string...

from time import time
class Foo:
    def go(self):
        print "Time:", time()


I get this code and store it as, "data"

data = receivePythonSource()

Then I try...

exec marshal.loads(data) in my_module.__dict__

However I get an error saying:
ValueError: invalid literal for __float__: om time import time
class Foo:
    def go(self):

....almost like when I try to marshal and exec it misses the first two
characters, "fr" ...any ideas?



From bill.tydeman at gmail.com  Mon Jan 15 18:02:43 2007
From: bill.tydeman at gmail.com (Bill Tydeman)
Date: Mon, 15 Jan 2007 18:02:43 -0500
Subject: download win32file
In-Reply-To: <200701151805.19483.inq1ltd@verizon.net>
References: <mailman.2742.1168900097.32031.python-list@python.org>
	<_mTqh.49191$kn7.39312@newsfe23.lga>
	<200701151805.19483.inq1ltd@verizon.net>
Message-ID: <501e09e0701151502x352e4b42hb353a44d0319fd54@mail.gmail.com>

>
>
> ?? Do I have to download pywin32 to get win32ui,
> or win32file, or win32api



Yes

-- 
There is no reason for any individual to have a computer in his home.
        Ken Olsen, President, Digital Equipment, 1977
        US computer engineer & industrialist (1926 - )
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070115/7268c53b/attachment.html>

From david at boddie.org.uk  Sat Jan 20 12:05:04 2007
From: david at boddie.org.uk (David Boddie)
Date: Sat, 20 Jan 2007 18:05:04 +0100
Subject: The proper use of QSignalMapper
References: <1169045073.138626.60770@l53g2000cwa.googlegroups.com>
	<1169049100.393777.269350@v45g2000cwv.googlegroups.com>
	<1169085859.586698.149400@51g2000cwl.googlegroups.com>
	<1169135947.039984.108930@51g2000cwl.googlegroups.com>
	<1169305392.100624.295850@11g2000cwr.googlegroups.com>
Message-ID: <86ec2$45b24bc1$54d1d767$19264@news.chello.no>

On Saturday 20 January 2007 16:03, borntonetwork wrote:

> David, thanks for your help. Unfortunately, all attempts of making this
> solution work have failed. I would be interested to know if anyone has
> used QSignalMapper successfully in a similar situation.

Looking again at what you originally wrote, and looking at your
solution below, I don't think it's really appropriate to use a
QSignalMapper for this purpose. (That's what I understood from the
signature of the deleteProductIngredient() method you had in your
original code.)

What you appear to want is a way of being notified about state
changes to widgets that also identifies the individual widget
that changed. You can do that by connecting the individual widgets
to the same slot and call sender() to find out which object emitted
the signal; for example:

        # ...

????????for?idx?in?range(1,?maxIngredients+1):
????????????wName?=?'chkProductIngredientsDelete_'+str(idx)
????????????w?=?self.__dict__[wName]
????????????self.connect(w,?QtCore.SIGNAL("stateChanged(int)"),
????????????             self.deleteProductIngredient)

  def deleteProductIngredient(self, state):
      """Delete a product ingredient."""
      print self.sender(), "changed state to", state

What QSignalMapper does is collect signals from different objects,
assigning an ID to each of them, and emits a single signal with
an ID whenever it receives a signal from one of those objects.
In other words, it allows the actions of a group of objects to be
described by a parameter but discards the signal's arguments.
It's most useful for things like collections of push buttons where
you only need to know that they were clicked.

> For any interested, I worked around the problem using a closure,
> which seems a bit cleaner from a coding point of view, although
> I don't have any idea if it is more efficient or not:

[...]

> Each iteration then created a new function based on the closure:

[...]

It's good to know that you got something working in the end. There's
also another solution that involves QSignalMapper, but it may not make
the resulting code any simpler.

David


From casevh at comcast.net  Thu Jan  4 02:43:28 2007
From: casevh at comcast.net (casevh at comcast.net)
Date: 3 Jan 2007 23:43:28 -0800
Subject: code optimization (calc PI) / Full Code of PI calc in Python and
	C.
In-Reply-To: <cuYmh.201$9v1.239@nntpserver.swip.net>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
	<459BFDCB.4000503@sschwarzer.net>
	<UGXmh.194$9v1.250@nntpserver.swip.net>
	<1167872076.937415.250340@11g2000cwr.googlegroups.com>
	<cuYmh.201$9v1.239@nntpserver.swip.net>
Message-ID: <1167896607.991340.32120@s34g2000cwa.googlegroups.com>


Michael M. wrote:
> Ok, here is the code. It is a translation of the following code, found
> on the internet.
>
> * The C is very fast, Python not.
> * Target: Do optimization, that Python runs nearly like C.

There is an error in the translated code. It returns 1600 digits
instead of 800 digits.

>
> counter=c
> while 0<=counter+4000:
>    f.append(2000)  #   f.append( int(a/5) )
>    counter=counter-1
>    # b=b+1

This creates a list f with length 9601. It should have a length of
2801.

I found an explanation of the original C program at
http://rooster.stanford.edu/~ben/maths/pi/code.html

Using the variable names from the above explanation and editing the
code posted by bearophile to match the explanation, I have the
following:

from time import clock

def compute_pi():
    pi = []
    a = 10000
    i = k = b = d = c = 0
    k = 2800
    r = [2000] * 2801
    while k:
        d = 0
        i = k
        while True:
            d += r[i] * a
            b = 2 * i - 1
            r[i] = d % b
            d //= b
            i -= 1
            if i == 0: break
            d *= i
        k -= 14
        pi.append("%04d" % int(c + d // a))
        c = d % a
    return "".join(pi)

start_time = clock()
pi = compute_pi()
print pi
print "Total time elapsed:", round(clock() - start_time, 2), "s"
print len(pi)

You're original version takes 2.8 seconds on my computer. The above
version takes .36 seconds. I tried a couple of optimizations but
couldn't make any more improvements.

casevh



From agriff at tin.it  Sun Jan  7 03:59:02 2007
From: agriff at tin.it (Andrea Griffini)
Date: Sun, 07 Jan 2007 09:59:02 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <7xd55rzke9.fsf@ruckus.brouhaha.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
	<7xd55rzke9.fsf@ruckus.brouhaha.com>
Message-ID: <45a0b4e3$0$19089$4fafbaef@reader4.news.tin.it>

Paul Rubin wrote:

 > Yes I've had plenty of
> pointer related bugs in C programs that don't happen in GC'd
> languages, so GC in that sense saves my ass all the time.

My experience is different, I never suffered a lot for
leaking or dangling pointers in C++ programs; and on
the opposite I didn't expect that fighting with object
leaking in complex python applications was that difficult
(I've heard of zope applications that just gave up and
resorted to the "reboot every now and then" solution).

With a GC if you just don't plan ownership and disposal
carefully and everything works as expected then you're
saving some thinking and code, but if something goes
wrong then you're totally busted.
The GC "leaky abstraction" requires you to be lucky to
work well, but unfortunately IMO as code complexity
increases one is never lucky enough.

Andrea


From fuzzyman at gmail.com  Sun Jan  7 15:37:07 2007
From: fuzzyman at gmail.com (Fuzzyman)
Date: 7 Jan 2007 12:37:07 -0800
Subject: Capturing stderr and stdout of a subprocess as a single stream
In-Reply-To: <1168201039.867515.35300@38g2000cwa.googlegroups.com>
References: <1168198435.629380.136080@42g2000cwt.googlegroups.com>
	<1168201039.867515.35300@38g2000cwa.googlegroups.com>
Message-ID: <1168202227.147827.294910@s80g2000cwa.googlegroups.com>


Gabriel Genellina wrote:
> On 7 ene, 16:33, "Fuzzyman" <fuzzy... at gmail.com> wrote:
[snip..]
> > My current code works, but *doesn't* capture stderr :
> >
> > from threading import Thread
> >
> > pipe = os.popen(executable)
> >
> > def DisplayOutput():
> >     while True:
> >         output = pipe.read(1)
> >         if not output:
> >             break
> >         display(output)
> >
> > Thread(target=DisplayOutput).start()
> >
> > All the best,
> >
> > Fuzzyman
> > http://www.voidspace.org.uk/python/articles.shtml
>
> Try using popen4 instead. But since you already have a thread, it may
> be better to use popen2 and two threads to read from stdout and stderr
> to avoid a potential deadlock; they can put read lines into a Queue,
> and DisplayOutput just get these lines in order. (See the warnings in
> the popen2 module documentation).
>

popen4 works great, I didn't even know it existed.

Two threads and a queue sounds horrible.

Thanks

Fuzzyman
http://www.voidspace.org.uk/python/articles.shtml

> -- 
> Gabriel Genellina



From nmm1 at cus.cam.ac.uk  Mon Jan  8 10:58:56 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 8 Jan 2007 15:58:56 GMT
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk> <entj5d$o4$1@south.jnrs.ja.net>
	<entkru$2vs$1@gemini.csx.cam.ac.uk>
	<50f5snF1fb5uqU2@mid.individual.net>
Message-ID: <entpo0$d0g$1@gemini.csx.cam.ac.uk>


In article <50f5snF1fb5uqU2 at mid.individual.net>,
Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:
|> Nick Maclaren wrote:
|> 
|> > Ah!  That explains it.  I would call that reason intermediate
|> > between rational and an artifact of the way the code has evolved!
|> 
|> Which code has evolved? Those precision problems are inherent
|> problems of the way floats are stored in memory.

The use of different precisions for the two cases is not, however,
and it is that I was and am referring to.


Regards,
Nick Maclaren.


From nogradi at gmail.com  Wed Jan 31 18:23:18 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Thu, 1 Feb 2007 00:23:18 +0100
Subject: pil, histogram, mask
Message-ID: <5f56302b0701311523gc7a3620o7a5e8cb2b2941d1c@mail.gmail.com>

How does one do a histogram on only a part of an image?
This is what I found in the PIL documentation about histogram( ):

"""
im.histogram(mask) => list

Returns a histogram for those parts of the image where the mask image
is non-zero. The mask image must have the same size as the image, and
be either a bi-level image (mode "1") or a greyscale image ("L").
"""

But I don't quite understand what "mask image is non-zero" mean. Does
it mean non-white? For instance how would I get a histogram from the
border of an image where the border is, say, 5% in width and height of
the width and heigth of the full image? Do I need to prepare a mask
image that is white in the middle and non-white at the edges? I should
maybe add that I don't need the histogram really, only the mean color
value, but as far as I can see the 'mean' attribute only applies to an
image and a mask can not be specified.

In case I overlooked something in the docs (which is easily possible)
please point me to the appropriate page.


From bblais at bryant.edu  Thu Jan 11 14:58:00 2007
From: bblais at bryant.edu (Brian Blais)
Date: Thu, 11 Jan 2007 14:58:00 -0500
Subject: Need better run/edit method. I have to restart the shell after
	every	script change.
In-Reply-To: <1168544475.849070.92160@77g2000hsv.googlegroups.com>
References: <1168544475.849070.92160@77g2000hsv.googlegroups.com>
Message-ID: <45A696C8.3050708@bryant.edu>

Mark wrote:
> I'm currently running the IDLE shell under Python 2.5, on Windows XP.
> 
> Every time I edit my .txt or .py file, I have to restart the IDLE shell
> for the changes to take effect. It's pretty annoying. Assuming IDLE is
> already open, here are the steps that I typically take:
> 
> 1. Open .txt version of module or script using notepad
> 2. make changes
> 3. save .txt file as .txt file
> 4. save .txt file as .py file
> 5. reset IDLE
> 6. import module again
> 

why do you involve notepad, and .txt files?  Instead, try this:

1. Run Idle
2. Choose File/New Window
3. Edit your .py file, and save it as a .py file
4. Choose Run/Run Module
5. Make changes, and save again
6. Choose Run/Run Module
7. etc...

you don't need to close IDLE ever.  IDLE refers to the editor, and the shell that 
runs connected to it.  If you have just the shell, you can open the editor with 
File/New Window.  If you have just the editor, you can choose Run/Python Shell   or 
Run/Run Module depending on what you want to do, to get the shell.

You can also take a .py file in the Windows explorer, right-click, and choose "Open 
with IDLE" to start editing it directly.

You shouldn't save things as .txt, because then IDLE will not recognize it is python 
you are writing, and the right-click trick probably won't work either.  You should 
never use Notepad, because it is just icky, and doesn't know about any programming 
languages.  :)

Hope this helps,

			Brian Blais


-- 
-----------------

              bblais at bryant.edu
              http://web.bryant.edu/~bblais


From tinaweb at bestemselv.com  Fri Jan 26 04:26:29 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Fri, 26 Jan 2007 10:26:29 +0100
Subject: Prefered install method?
In-Reply-To: <51tu02F1lqdjbU1@mid.uni-berlin.de>
References: <GuadndfwVf7pMCTYRVnzvA@telenor.com>
	<51tu02F1lqdjbU1@mid.uni-berlin.de>
Message-ID: <vKSdnQ2dFpPYVCTYRVnzvA@telenor.com>

Diez B. Roggisch wrote:
> These days, it's setuptools. Google for it. It will let you distribute 
> your application in a convenient way as so-called EGG (basically a 
> ZIP-file), additionally you will get support for installing scripts in 
> /usr/bin or wherever you like, and you have versioning support.
> 
> If you plan to release the app publically, it will also handle the 
> upload to the PyPI, the python package index - also known(?) as cheeseshop.
> 
> Diez

Great! Obviously exactly what I'm looking for. I already had it 
installed even, and it seem to be quite well documented and noob friendly.

Thanks :)
Tina


From parallelpython at gmail.com  Sun Jan 14 04:32:57 2007
From: parallelpython at gmail.com (parallelpython at gmail.com)
Date: 14 Jan 2007 01:32:57 -0800
Subject: Threaded for loop
In-Reply-To: <1168750487.337511.213600@38g2000cwa.googlegroups.com>
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
	<1168747208.275625.55590@51g2000cwl.googlegroups.com>
	<1168750487.337511.213600@38g2000cwa.googlegroups.com>
Message-ID: <1168767176.995011.327620@l53g2000cwa.googlegroups.com>

John wrote:
> Thanks. Does it matter if I call shell commands os.system...etc in
> calculate?
>
> Thanks,
> --j

The os.system command neglects important changes in the environment
(redirected streams) and would not work with current version of ppsmp.
Although there is a very simple workaround:
print os.popen("yourcommand").read()
instead of os.system("yourcommand")


Here is a complete working example of that code:
http://www.parallelpython.com/component/option,com_smf/Itemid,29/topic,13.0



From dickinsm at gmail.com  Mon Jan 15 11:18:09 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: 15 Jan 2007 08:18:09 -0800
Subject: Conflicting needs for __init__ method
In-Reply-To: <1168822140.799071.153390@s34g2000cwa.googlegroups.com>
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<1168822140.799071.153390@s34g2000cwa.googlegroups.com>
Message-ID: <1168877889.309925.312860@11g2000cwr.googlegroups.com>

On Jan 14, 7:49 pm, "Ziga Seilnacht" <ziga.seilna... at gmail.com> wrote:
> Mark wrote:[a lot of valid, but long concerns about types that return
>  an object of their own type from some of their methods]
>
> I think that the best solution is to use an alternative constructor
> in your arithmetic methods. That way users don't have to learn about
> two different factories for the same type of objects. It also helps
> with subclassing, because users have to override only a single method
> if they want the results of arithmetic operations to be of their own
> type.

Aha.  I was wondering whether __new__ might appear in the solution
somewhere, but couldn't figure out how that would work;  I'd previously
only ever used it for its advertised purpose of subclassing immutable
types.

> Hope this helps,

It helps a lot.  Thank you.

Mark



From michael at mustun.ch  Wed Jan  3 14:04:36 2007
From: michael at mustun.ch (Michael)
Date: Wed, 03 Jan 2007 20:04:36 +0100
Subject: code optimization (calc PI)
In-Reply-To: <1167844466.030065.303280@k21g2000cwa.googlegroups.com>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
	<1167844466.030065.303280@k21g2000cwa.googlegroups.com>
Message-ID: <X6Tmh.142$9v1.230@nntpserver.swip.net>

Hmm..  thanks. I did this changes, but without any performance profits.


Matimus wrote:

> Using the '+' operator for string concatonation can be slow, especially
> when done many times in a loop.
> 
> 
>>   pi = pi + str("%04d" % int(e + d/a))  ## this should be fast?! I dont
> 
> 
> The accepted solution would be to make pi an array and append to the
> end...
> 
> pi = [] #create the array (empty)
> ...
> ...
> pi.append(str("%04d"%int(e+d/a))) # append to it
> 
> And when it is time to print the results do the following:
> 
> print "".join(pi)
> 
> It may look strange, but it is a common Python idiom. You might also
> look into an optimizer such as psycho: http://psyco.sourceforge.net/.
> 


From Thomas.Ploch at gmx.net  Sat Jan  6 11:27:21 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sat, 06 Jan 2007 17:27:21 +0100
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>	<mailman.2332.1168016502.32031.python-list@python.org>	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>
	<yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>
Message-ID: <459FCDE9.4030100@gmx.net>

W. Watson schrieb:
> The wiki site lead to a link to download pythonwin, but the download is 
> broken. Googling invariably leads back to that link. I found 
> <http://www.python.org/download/releases/binaries-1.4/pythonwin/>, which has 
> two files listed: oadist.exe and win32dbg.exe. Do I need both or is just the 
> latter one?


A google query 'pythonwin' directly brings me here:

https://sourceforge.net/projects/pywin32/

I think this is the place to go

Thomas




From vatamane at gmail.com  Fri Jan 12 09:31:24 2007
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 12 Jan 2007 06:31:24 -0800
Subject: Tools Designing large/complicated applications
References: <mailman.2615.1168560567.32031.python-list@python.org>
Message-ID: <1168612284.730059.225640@11g2000cwr.googlegroups.com>

Carl,

Some well known design applications have plugins for UML<->Python
translation. For example EnterpriseArchitect
(http://www.sparxsystems.com.au/resources/mdg_tech/) has a plugin for
Python.  ObjectDomain though supports it natively:
http://www.objectdomain.com/products/od/overview.do

The good thing about Python is that it is concise enough to not need
UML diagrams. Python can be used as a prototype language itself. In
other words it could take longer to draw the UML diagram than it would
take to type up a mock-up in Python. While with Java, for example, it
is very helpful to have a code generation application to take care of
all the getters and setters.

But of course if you have non-technical people who just know how to
read UML diagrams, it makes sense to invest in a good design tool.

Hope this helps,
-Nick


Carl J. Van Arsdall wrote:
> For those of you that work on larger applications but still code in
> python... do your development teams use any tools to facilitate the
> design? (i'm not asking about editors here, i'm really asking about
> software design tools)  Are these the same tools you would use to help
> engineer software in another language?
>
> Is there anyone here who is forced to use a tool to design python
> software that completely hates it?  Why do you hate it?
>
> Thanks!
>
> -carl
>
>
> --
>
> Carl J. Van Arsdall
> cvanarsdall at mvista.com
> Build and Release
> MontaVista Software



From bborcic at gmail.com  Tue Jan 23 09:59:46 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Tue, 23 Jan 2007 15:59:46 +0100
Subject: Rendering text question (context is MSWin UI Automation)
Message-ID: <45b6231b$1_2@news.bluewin.ch>

Hello,

I am trying to use UI Automation to drive an MS Windows app (with pywinauto).

I need to scrape the app's window contents and use some form of OCR to get at 
the texts (pywinauto can't get at them).

As an alternative to integrating an OCR engine, and since I know the fonts and 
sizes used to write on the app's windows, I reasoned that I could base a simple 
text recognition module on the capability to drive MSWindows text rendering - eg 
to generate pixmaps of texts I expect to find in the driven app's windows, exact 
to the pixel.

The advantage of that approach would be exactitude and self-containment.

I've verified manually inside an Idle window, that indeed I could produce 
pixmaps of expected app texts, exact to the pixel (with Tkinter+screen capture 
at least).

I could use help to turn this into a programmable capability, ie : A simple - 
with Tkinter or otherwise - way to wrap access to the MS Windows UI text 
rendering engine, as a function that would return a picture of rendered text, 
given a string, a font, a size and colors ?

And ideally, without interfering with screen contents ?

Thanks in advance for any guidance,

Boris Borcic


From gagsl-py at yahoo.com.ar  Sun Jan 21 19:56:47 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 21 Jan 2007 21:56:47 -0300
Subject: Beginners Tutorial in PDF Format?
References: <_6Qsh.51414$wc5.5373@newssvr25.news.prodigy.net><1169415358.277431.130640@s34g2000cwa.googlegroups.com>
	<FJTsh.36658$Gr2.32367@newssvr21.news.prodigy.net>
Message-ID: <ep1248$vj1$1@sea.gmane.org>

"W. Watson" <wolf_tracks at invalid.com> escribi? en el mensaje 
news:FJTsh.36658$Gr2.32367 at newssvr21.news.prodigy.net...
Robert Hicks wrote:
> W. Watson wrote:
>> I'd like to print a tutorial in one fell swoop, but it seems most on the
>> various sites are page by page embedded descriptions in the page. Any
>> available as a pdf?
>
> http://docs.python.org/download.html
>
> http://www.diveintopython.org/
>
> Thanks, but the first url takes me to a web page that contains the 
> complete
> tutorial. Does choosing pdf (USA) in the table download a file that 
> contains
> all the documents on the list below and to the left?

Try again. The first url goes to this page:
Download Python 2.5 Documentation (19 September 2006): To download an 
archive containing all the documents for this version of Python in one of 
various formats [pdf included, you can choose between Letter/A4].
Below, it says "These documents are not available for download 
individually."

-- 
Gabriel Genellina




From pgarrone at acay.com.au  Fri Jan 19 21:00:23 2007
From: pgarrone at acay.com.au (pgarrone at acay.com.au)
Date: 19 Jan 2007 18:00:23 -0800
Subject: Py 2.5 on Language Shootout
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>
Message-ID: <1169258423.824108.228810@s34g2000cwa.googlegroups.com>

Alioth is a great site for selecting the language in which to implement
primitives. Usually it's C.

Two of the alioth benchmarks, Partial-sums and Spectral-norm, could be
done using Numarray, or would be done with Numarray if most of the
program was in Python and there was a need to implement a similar
numerical procedure. The speed would be up near the compiled language
benchmarks. However the specific wording of these benchmarks prohibits
this approach. Spectral-norm must pretend the dataset is infinite, and
Partial-sums has to be implemented in a simple dumb loop.

Looking over the benchmarks, one gains the impression that Python is a
slow language.
My first serious Python programming exercise involved converting a 900
line Bash Shell program to a 500 line Python program, with a speedup
factor of 17. Using Python allowed an OO structure and advanced
containers, meaning the program was more maintainable and portable,
which were the main aims of the exercise. The speedup was a surprising
and welcome side benefit. I think it was mosly because the Python
byte-code interpreter is probably an order of magnitude faster than
Bash's direct interpretation, and because in Python system calls to
recurse directories and create symbolic links were not forked to
separate processes. In fact I would guess that the overall speed of the
Python program would be little less than a C program, given that most
of the time would be spent in system calls.

Its almost possible to make a large Python program arbitrarily fast by
profiling it and implementing slow bits as primitives. Size is probably
of greater concern.



From steven.bethard at gmail.com  Wed Jan 17 18:43:56 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 17 Jan 2007 16:43:56 -0700
Subject: aligning ElementTrees to text
Message-ID: <atSdnSMBws0jKTPYnZ2dnUVZ_tWhnZ2d@comcast.com>

I'm trying to align an XML file with the original text file from which 
it was created. Unfortunately, the XML version of the file has added and 
removed some of the whitespace. For example::

     >>> plain_text = '''
     ... Pacific First Financial Corp. said shareholders approved its
     ... acquisition.
     ... '''
     >>> xml_text = '''   <s>Pacific First Financial Corp.
     ... <EVENT eid="e1" class="REPORTING" > said </EVENT> shareholders
     ... <EVENT eid="e2" class="OCCURRENCE" >approved</EVENT> its
     ... <EVENT eid="e8" class="OCCURRENCE" >    acquis ition </EVENT>.
     ... </s>
     ... '''

I want to determine which offsets in the *original* text each element 
from the XML text is supposed to cover. So I want something like::

     >>> xml_tree = etree.fromstring(xml_text)
     >>> align(xml_tree, plain_text)
     [(<Element 'EVENT' at 01411B00>, 31, 35),
     (<Element 'EVENT' at 01411EA8>, 49, 57),
     (<Element 'EVENT' at 01411E18>, 62, 73),
     (<Element 's' at 01411FC8>, 1, 74)]

where ``align`` has returned a list of all elements in the XML text 
along with their start and end indices in the original text::

     >>> plain_text[31:35]
     'said'
     >>> plain_text[49:57]
     'approved'
     >>> plain_text[62:73]
     'acquisition'

Note that I want to ignore whitespace as much as possible, so the 
elements are aligned only to the non-whitespace text they include.


Below is my current implementation of the ``align`` function. It seems 
pretty messy to me -- can anyone offer me some advice on how to clean it 
up or write it differently?

     def align(tree, text):

         def align_helper(elem, elem_start):
             # skip whitespace in the text before the element
             while text[elem_start:elem_start + 1].isspace():
                 elem_start += 1

             # advance the element end past any element text
             elem_end = elem_start
             if elem.text is not None:
                 for char in elem.text:
                     if not char.isspace():
                         while text[elem_end:elem_end + 1].isspace():
                             elem_end += 1
                         assert text[elem_end] == char
                         elem_end += 1

             # advance the element end past any child elements
             for child_elem in elem:
                 elem_end = align_helper(child_elem, elem_end)

             # advance the start for the next element past the tail text
             next_start = elem_end
             if elem.tail is not None:
                 for char in elem.tail:
                     if not char.isspace():
                         while text[next_start:next_start + 1].isspace():
                             next_start += 1
                         assert text[next_start] == char
                         next_start += 1

             # add the element and its start and end to the result list
             result.append((elem, elem_start, elem_end))

             # return the start of the next element
             return next_start

         result = []
         align_helper(tree, 0)
         return result


Thanks,

STeVe


From dotancohen at gmail.com  Wed Jan  3 11:21:58 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Wed, 3 Jan 2007 18:21:58 +0200
Subject: Unsubscribing from the list
In-Reply-To: <enghj3$qhf$1@sea.gmane.org>
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>
	<ene064$bm5$1@sea.gmane.org>
	<880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>
	<enghj3$qhf$1@sea.gmane.org>
Message-ID: <880dece00701030821y7f97504n5c8e658da14ba05f@mail.gmail.com>

On 03/01/07, Fredrik Lundh <fredrik at pythonware.com> wrote:
> if you're unable to follow written instructions, how on earth did you manage
> to subscribe to this list ?
>
> </F>
>

Actually, I'm a compete idiot and I always post to the mailing list
instead of RTFM or STFW. What's the name of that big big website?
goobble or something?!?

The first sentance under the heading "Python-list Subscribers" is:
The subscribers list is only available to the list administrator.
Admin address: Password:

As I'm not an admin, I read no further.

Dotan Cohen

http://lyricslist.com/lyrics/artist_albums/169/duran_duran.html
http://dapot.com


From kKR_NIE_PISZ at gazeta.pl  Tue Jan 23 03:55:08 2007
From: kKR_NIE_PISZ at gazeta.pl (kKR)
Date: Tue, 23 Jan 2007 09:55:08 +0100
Subject: libhOCR-python - has somebody any experience with it?
Message-ID: <ep4ihc$hir$1@inews.gazeta.pl>

Hi people!

I spent some time looking for any tutorials or examples, but I didn't find
anything. 

All the Best,
kKR 




From melih.onvural at gmail.com  Wed Jan 31 16:25:02 2007
From: melih.onvural at gmail.com (Melih Onvural)
Date: 31 Jan 2007 13:25:02 -0800
Subject: SyntaxError: 'return' outside function
Message-ID: <1170278702.599741.212420@l53g2000cwa.googlegroups.com>

Has anyone seen this error before and been able to solve it? I can't
seem to find anything that leads to a solution. I found this post
http://zope.org/Collectors/Zope/1809, but can't really understand it.
I've attached my code below to see if anything looks funny. It happens
at the very last return at the end. Thanks in advance,

--melih

===========Code========

	def legiturl(self, url):
	# this breaks down the url into 6 components to make sure it's
"legit"
		t = urlparse.urlparse(url)

		if t[0] != 'http':
			return ""

        # remove URL fragments, but not URL
        if len(t[5]) > 0:
        	url = urlparse.urlunparse((t[0],t[1],t[2],"","",""))
        	t = urlparse.urlparse(url)

        # stupid parser sometimes leaves frag in path
        x = find(t[2], '#')
        if x >= 0:
        	return ""



From nszabolcs at gmail.com  Mon Jan 29 12:06:48 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 29 Jan 2007 09:06:48 -0800
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <1170088693.768440.26580@h3g2000cwc.googlegroups.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<epl3la$10g0$1@ulysses.news.tiscali.de>
	<1170088693.768440.26580@h3g2000cwc.googlegroups.com>
Message-ID: <1170090408.495646.85720@v33g2000cwv.googlegroups.com>


> while
> 1:i=__import__;print''.join(i('random').choice(i('string').letters
> +'1234567890')for x in range(8)),;raw_input()
>

while 
1:i=__import__;r='random';print''.join(i(r).choice(i('string').letters
+'1234567890')for x in`r`),;raw_input()

even shorter:
range -> `'random'`

:)



From rory at campbell-lange.net  Mon Jan  8 16:30:15 2007
From: rory at campbell-lange.net (Rory Campbell-Lange)
Date: Mon, 8 Jan 2007 21:30:15 +0000
Subject: Maths error
Message-ID: <20070108213015.GA2838@campbell-lange.net>

>>> (1.0/10.0)  + (2.0/10.0) + (3.0/10.0)
0.60000000000000009
>>> 6.0/10.0
0.59999999999999998

Is using the decimal module the best way around this? (I'm expecting the first
sum to match the second). It seem anachronistic that decimal takes strings as
input, though.

Help much appreciated;
Rory
-- 
Rory Campbell-Lange 
<rory at campbell-lange.net>
<www.campbell-lange.net>


From robert.kern at gmail.com  Tue Jan  9 14:31:19 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 09 Jan 2007 13:31:19 -0600
Subject: Maths error
In-Reply-To: <50i49iF1fvo3rU1@mid.individual.net>
References: <mailman.2448.1168293199.32031.python-list@python.org>	<50fudtF1g1nplU1@mid.individual.net>	<envur1$rq1$1@gemini.csx.cam.ac.uk>
	<50i49iF1fvo3rU1@mid.individual.net>
Message-ID: <eo0qid$l86$1@sea.gmane.org>

Bjoern Schliessmann wrote:
> Nick Maclaren wrote:
> 
>> No, don't.  That is about another matter entirely, 
> 
> It isn't.

Actually it really is. That thread is about the difference between
str(some_float) and repr(some_float) and why str(some_tuple) uses the repr() of
its elements.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From deets at nospam.web.de  Tue Jan  9 01:18:59 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 09 Jan 2007 07:18:59 +0100
Subject: Recommendations (or best practices) to define functions (or
	methods)
In-Reply-To: <1168262998.765702.38760@i15g2000cwa.googlegroups.com>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
	<50ehtmF1fh46iU1@mid.uni-berlin.de>
	<1168262998.765702.38760@i15g2000cwa.googlegroups.com>
Message-ID: <50gqeoF1dnbdqU1@mid.uni-berlin.de>

vizcayno schrieb:
> Diez B. Roggisch ha escrito:
> 
>> vizcayno schrieb:
>>> Hello:
>>> Need your help in the "correct" definition of the next function. If
>>> necessary, I would like to know about a web site or documentation that
>>> tells me about best practices in defining functions, especially for
>>> those that consider the error exceptions management.
>>> I have the next alternatives but I think there are better:
>> <snip/>
>>
>> IMHO none of them is good. Python has exceptions. Use them. There is no
>> need to awkwardly communicate error conditions using return-values. Use
>> return values to return values. Use exceptions in case of errors.
>>
>> Diez
> 
> Diez, in that case I woul prefer not to use exceptions and wait for
> Python to abort itself and wait to see the message it issues.

You are not making sense here - to me at last.

If you don't handle the exceptions, exactly what you seem to want will 
happen - you will see the interpreter stop, and why.

Handling errors in a graceful way can't be done by a standardized way, 
as you seem to want. It depends to much on what the actual code is 
doing. Sometimes an abort is necessary, sometimes you can continue 
working - but it all depends on what your actual usecase is, on a very 
detailed level.

All you did was to take the unpythonic (and un-javaic and un-C#ic) road 
to transform an exception to a returncode. But that has nothing to do 
with actually _dealing_ with the error. Instead, it just makes it more 
likely that you _don't_ deal with it, as a return-code evaluation might 
be more easily forgotten, and turn out with a program that will be 
error-prone, as it continues to run even when the preconditions for 
pieces of code aren't met anymore.


Diez


From jonc at icicled.net  Sat Jan  6 18:39:26 2007
From: jonc at icicled.net (Jonathan Curran)
Date: Sat, 6 Jan 2007 17:39:26 -0600
Subject: Traceback of hanged process
In-Reply-To: <200701061737.20605.jonc@icicled.net>
References: <1168123532.3498.51.camel@chopin>
	<200701061737.20605.jonc@icicled.net>
Message-ID: <200701061739.27027.jonc@icicled.net>

Heh, I kinda messed up the code there. It should be:

import sys

log_file = open('errors.log', 'w')
sys.stderr = log_file

<your code>

log_file.close()

As for the Ctrl-C, you can catch that when KeyboardInterrupt exception is 
raised.

- Jonathan


From gagsl-py at yahoo.com.ar  Fri Jan 19 10:22:57 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 12:22:57 -0300
Subject: Why this script can work?
References: <mailman.2891.1169189508.32031.python-list@python.org><51bjskF1jbnhrU1@mid.uni-berlin.de>
	<fbe35f750701190254i79ecddf6id4dd9a7e726d1f5b@mail.gmail.com>
Message-ID: <eoqnoi$k9b$1@sea.gmane.org>

"Jm lists" <practicalperl at gmail.com> escribi? en el mensaje 
news:fbe35f750701190254i79ecddf6id4dd9a7e726d1f5b at mail.gmail.com...

> I'm not habitual for this usage of 'else',other languages seem don't
> support this syntax.
> i.g,writting the codes below by Perl would get an error:
>
> [[[censored example]]]

If all languages had the same features, what would be the point of having 
different languages at all?

-- 
Gabriel Genellina 




From __peter__ at web.de  Wed Jan 17 11:20:17 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 17 Jan 2007 17:20:17 +0100
Subject: question about module resolution
References: <1169050133.438101.90030@a75g2000cwd.googlegroups.com>
Message-ID: <eolibj$mf2$02$1@news.t-online.com>

Emin wrote:

> I often find myself wanting to have a child module get some parameters
> defined in a parent module. For example, imagine  I have the following
> directory structure and want something in baz.py to look at a value in
> config.py. I end up putting in things like import sys;
> sys.path.append('../..'). Is there a better way?
> 
> foo/
>      __init__.py
>      config.py
>      bar/
>           __init__.py
>           baz.py

from __future__ import absolute_import
from .. import config

Peter


From mail at microcorp.co.za  Tue Jan  9 00:31:03 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 9 Jan 2007 07:31:03 +0200
Subject: recursive function
References: <1168265240.294223.298750@s80g2000cwa.googlegroups.com><slrneq4ne7.k8.horpner@FIAD06.norwich.edu>
	<1168277289.970128.44880@38g2000cwa.googlegroups.com>
Message-ID: <021801c733c8$3f2ae500$03000080@hendrik>


"cesco" <fd.calabrese at gmail.com> wrote:

> 
> Neil Cerutti wrote:
> > On 2007-01-08, cesco <fd.calabrese at gmail.com> wrote:
> > > Hi,
> > >
> > > I have a dictionary of lists of tuples like in the following example:
> > > dict = {1: [(3, 4), (5, 8)],
> > >         2: [(5, 4), (21, 3), (19, 2)],
> > >         3: [(16, 1), (0, 2), (1, 2), (3, 4)]]
> > >
> > > In this case I have three lists inside the dict but this number
> > > is known only at runtime. I have to write a function that
> > > considers all the possible combinations of tuples belonging to
> > > the different lists and return a list of tuples of tuples for
> > > which the sum of the first element of the most inner tuple is
> > > equal to N.
> > >
> > > For example, assuming N = 24, in this case it should return:
> > > [((3, 4), (5, 4), (16, 1)), ((3, 4), (21, 3), (0, 2)), ((5, 8), (19,
> > > 2), (0, 2))]
> >
> > What do you mean by "most inner tuple"?
> >
> > > A simple list comprehension would be enough if only I knew the
> > > number of keys/lists beforehand
> >
> > len(dict.keys()).
> 
> What I mean is that the number of keys/lists is not known until runtime
> and it changes randomly from time to time which means I would have to
> write every time a different list comprehension (or a different number
> of nested loops) to accomplish the same thing.
> In the example the result of the search should be a list containing
> three tuples each of which contains again three tuple (the most inner
> tuples). If you consider the first element of each tuple the sum is 24
> (like in 3+5+16, or 3+21+0 or 5+19+0).
> 
> Any other help will be appreciated


Is there any reliable structure in the data? 
- for instance in your example, the first list
has two tuples, the second one three, and the 
third one four - Is this a pattern?

- Hendrik




From Robert.Katic at gmail.com  Tue Jan 16 12:36:15 2007
From: Robert.Katic at gmail.com (goodwolf)
Date: 16 Jan 2007 09:36:15 -0800
Subject: arguments of a function/metaclass
In-Reply-To: <mailman.2782.1168966983.32031.python-list@python.org>
References: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>
	<1168964835.087773.221950@s34g2000cwa.googlegroups.com>
	<mailman.2782.1168966983.32031.python-list@python.org>
Message-ID: <1168968973.527414.239960@38g2000cwa.googlegroups.com>


Gabriel Genellina je napisao/la:
> "goodwolf" <Robert.Katic at gmail.com> escribi? en el mensaje
> news:1168964835.087773.221950 at s34g2000cwa.googlegroups.com...
> > A simply solution:
> >
> > def __init__(self, a=1, b=2, c=3, ......):
> >    for key, val in locals().items():
> >        if key != 'self':
> >            setattr(self.__class__, key, val)
> >
> > in addition:
> >
> > def set(self, **kwarg):
> >    for key in kwargs:
> >        if hasattr(self.__class__, key):
> >            setattr(self.__class__, key, kwargs[key])
> >        else:
> >            raise ....
>
> Why setattr(self.__class__,...) instead of setattr(self, ...)? You're
> modifying the class attributes, and that's not usually intended.
>
> -- 
> Gabriel Genellina

My error. Post was written directly. Sorry.



From deets at nospam.web.de  Fri Jan 12 09:48:16 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 12 Jan 2007 15:48:16 +0100
Subject: Python nuube needs Unicode help
References: <1168550894.155528.295700@p59g2000hsd.googlegroups.com>
	<eo7goj$n4s$03$1@news.t-online.com>
	<1168613067.354487.40840@51g2000cwl.googlegroups.com>
Message-ID: <50pldgF1gecd0U2@mid.uni-berlin.de>

gheissenberger at gmail.com wrote:

> Can you attach files in this forum? Couldn't find the option. Oh well,
> here's the file.
> 
> #!/usr/bin/python
> # Version: 1.1
> # Author:  Steve Losh
> 
> from sets import Set
> from optparse import OptionParser
> from xml.dom.minidom import parse
> 
> AudioPath     = 'audio/'
> DatafilePath  = 'utterances.trmxml'
> CONFIDENCE_LOW  = None #'500'
> CONFIDENCE_HIGH = None #'500'
> 
> utterancesFile = None
> 
> 
> class Utterance:
>     def __init__(self, audio, grammarSet, text):
>         self.audio      = audio
>         self.grammarSet = grammarSet
>         self.text       = text
> 
>     def __str__(self):
>         return "SWIrecAcousticStateReset\ntranscription " + self.text \
>                 + "\nrecognize " + AudioPath + self.audio

There your __str__-method is. self.text and self.audio come from the
xml-parsing and are unicode objects - so they need to be encoded, like
this:

def __str__(self):
    return "SWIrecAcousticStateReset\ntranscription " +
self.text.encode('utf-8') + "\nrecognize " + AudioPath +
self.audio.encode('utf-8')


Diez



From tjreedy at udel.edu  Mon Jan 22 22:41:14 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 22 Jan 2007 22:41:14 -0500
Subject: match nested parenthesis
References: <1169521381.814119.27020@11g2000cwr.googlegroups.com>
Message-ID: <ep404m$6bs$1@sea.gmane.org>


<s99999999s2003 at yahoo.com> wrote in message 
news:1169521381.814119.27020 at 11g2000cwr.googlegroups.com...
| hi
| i wish to find an reg exp for matching nested parenthesis of varying
| level like
| string =
| "somewords1(words(somewords2)-(some(some)words3)somestuff)somestuff"
| and be able to evaluate the pair starting from the inner most(the
| deepest level) , ie (some)
| up till the outer most. What is a good reg exp to do this? or is simple
| string manipulations enough?
| thanks

The presence of indefinitely nested fence markers, like parens, 
differentiates a context-free language, generated from a context-free 
grammar, from a regular language/grammar.  You cannot parse such sentences 
with a regex engine or even with an extended regex engine such as Python's. 
Use a more general parser.

tjr





From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan  8 14:53:52 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 08 Jan 2007 20:53:52 +0100
Subject: newbieee
References: <1168280831.323496.277020@38g2000cwa.googlegroups.com>
Message-ID: <50flqgF1fotpdU1@mid.individual.net>

lee wrote:

> I getting familiarised with python...can any one suggest me a good
> editor available for python which runs on windows xp....

Look here: http://wiki.python.org/moin/PythonEditors

> one more request guys...can nyone tell me a good reference manual
> for python..

Either the python homepage, or "Python in a Nutshell". The 2nd
edition covers 2.5.

Regards,


Bj?rn

-- 
BOFH excuse #324:

Your packets were eaten by the terminator



From hg at nospam.org  Tue Jan  2 06:58:27 2007
From: hg at nospam.org (hg)
Date: Tue, 02 Jan 2007 12:58:27 +0100
Subject: array of class
References: <mailman.2221.1167763760.32031.python-list@python.org>
Message-ID: <iXxmh.28948$_44.16382@newsfe23.lga>

mm wrote:

> 
> How can I do a array of class?
> 
> s1=[]  ## this array should hold classes
> 
> ## class definition
> class Word:
>    word=""
> 
> 
> ## empty words... INIT
> for i in range(100):  ## 0..99
>    s1.append(Wort)
> 
> s1[0].word="There"
> s1[1].word="should"
> s1[2].word="be"
> s1[3].word="different"
> s1[4].word="classes"
> 
> ... but it's not.
> 
> 
> print s1
> ------------
> [<class __main__.Wort at 0x7ff1492c>,
> <class __main__.Wort at 0x7ff1492c>,
> <class __main__.Wort at 0x7ff1492c>,
> <class __main__.Wort at 0x7ff1492c>,
> <class __main__.Wort at 0x7ff1492c>,
> <class __main__.Wort at 0x7ff1492c>,
> ........
> -----------
> 
> Here, this "classes" are all at the same position in memory. So there
> are no different classes in the array.
> 
> So I access with s1[0], s1[1], s1[2], etc. always the same data.
> 
> Any idea?
> 
> --
> Michael


do you mean object ?

your append should be append(Word()) as you need to create instances.

hg





From subscriber100 at rjs.org  Tue Jan  9 00:14:35 2007
From: subscriber100 at rjs.org (Ray Schumacher)
Date: Mon, 08 Jan 2007 21:14:35 -0800
Subject: multi-threaded webcam with SimpleAsyncHTTPServer.py
Message-ID: <6.2.3.4.2.20070108203953.02e99eb0@pop-server.san.rr.com>

 >>Question, though: how can I unblock asyncore.loop(), or at least 
be >>able to interrupt it?
 >Why do you want to do that?

I was then thinking along the lines of a Netmeeting/visual chat 
program, rather than a daemon-type server, where one might want to 
terminate more quickly.
Searching further, I see that a common idiom is like:

while some_condition:
     try: asyncore.loop(timeout=1, count = 1)
     except KeyboardInterrupt: break

or, spawn asyncore.loop() threads. Zope and Medusa seem to use a 
variety of methods.
A regular web-cam program serving up 2 or 3 cams on one machine will 
require more thought on my part, of course. I only run one cam, but a 
friend runs 3 and is pissed at the X10 software he paid for.
Thanks,
Ray



From shansen at advpubtech.com  Thu Jan 11 13:59:51 2007
From: shansen at advpubtech.com (Stephen Hansen)
Date: Thu, 11 Jan 2007 10:59:51 -0800
Subject: RotatingFileHandler + subprocess module problems
Message-ID: <7a9c25c20701111059q1186377nde4021eaf768d345@mail.gmail.com>

Hey, there.

I'm currently having a problem with what *looks* like an interaction between
using subprocess and RotatingFileHandler.

This is on Windows with Python 2.3

I have two console applications: app1 and app2.

For most of app2 to function properly, app1 must already be running.

App1 logs to c:\app1.log. App2 logs to c:\app2.log, both using
RotatingFileHandler from the logging module.

If I run app1, and then app2, it all works fine. Specifically, the apps are
logging correctly and I can see with Process Explorer that each has a handle
to the appropriate files.

However, I have a setting to make App2 run App1 in the background for
convienance. This is using the subprocess module. When this setting is on,
App2 will die horribly the first time that the doRollover comes along:
specifically it gets a permission denied error when it tries to rename
App2.log to App2.log.1

After doing some debugging, it appears that App1 (if started by App2 using
the subprocess module) has a handle to App2.log /somehow/. It never starts
it, or touches it (verified through debug messages), but seems to inherit
it.

Is there anything obvious I'm doing wrong? :) If it doesn't jump out at
anyone, I'll write up a mockup. I'm hoping I just did something of a goof
that will be obvious though, since the apps are a bit complicated and
distilling them down to a testcase will be mildly annoying. :)

Thanks in advance.

--Stephen
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070111/f4a7d6a2/attachment.html>

From horpner at yahoo.com  Thu Jan 11 11:02:49 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 11 Jan 2007 17:02:49 +0100
Subject: What happened to SPE?
References: <RWsph.46007$Nb2.875778@news1.nokia.com>
Message-ID: <slrneqco2b.vc.horpner@FIAD06.norwich.edu>

On 2007-01-11, Paulo Pinto <pjmlp at progtools.org> wrote:
> does anyone know what happened to SPE?
>
> It seems that the address http://pythonide.stani.be
> is no longer valid. :(

SPE lost its web host, and last I heard is looking for a new
home. For now you can get it here: 

  http://sourceforge.net/projects/spe/

-- 
Neil Cerutti
We don't necessarily discriminate.  We simply exclude certain types of people.
--Colonel Gerald Wellman


From mneagul at gmail.com  Thu Jan 25 10:13:21 2007
From: mneagul at gmail.com (mneagul)
Date: 25 Jan 2007 07:13:21 -0800
Subject: Python email parser
Message-ID: <1169738001.643280.140880@a75g2000cwd.googlegroups.com>

Hello,

  I want to use email.Parser for parsing some email messages but I have
a small problem: it is very, very slow...
  For 110MB of email messages it takes ~29-30 seconds for parsing. Do
you know some other email parser for python? 

Marian Neagul



From mw at visenso.de  Tue Jan 30 04:50:07 2007
From: mw at visenso.de (Marco Wahl)
Date: 30 Jan 2007 10:50:07 +0100
Subject: Explanation about pickle module
References: <1170149840.610362.319690@h3g2000cwc.googlegroups.com>
Message-ID: <9o3b5su9m8.fsf@gonzo.vircinity>

"raghu" <vgvr620034 at gmail.com> writes:

> can any one explain about pickle i read in the book but they have not 
> provided any example for that so please explain with a simple example
> 

>>> class Foo(object):
...   def __init__(self):
...     self.bar = 1
... 
>>> import pickle
>>> a = Foo()
>>> pickle.dumps(a)
"ccopy_reg\n_reconstructor\np0\n(c__main__\nFoo\np1\nc__builtin__\nobject\np2\nNtp3\nRp4\n(dp5\nS'bar'\np6\nI1\nsb."
>>> b = pickle.loads("ccopy_reg\n_reconstructor\np0\n(c__main__\nFoo\np1\nc__builtin__\nobject\np2\nNtp3\nRp4\n(dp5\nS'bar'\np6\nI1\nsb.")
>>> b.bar
1
>>> b
<__main__.Foo object at 0x402ae68c>
>>> 

There is also pickle.dumps and pickle.loads to work
directly with files.  Further there is module cpickle
which offers the same functionality as pickle but which
is faster.


Bye
-- 
Marco Wahl
http://visenso.com


From skip at pobox.com  Mon Jan 29 13:28:11 2007
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 29 Jan 2007 18:28:11 +0000 (UTC)
Subject: Python does not play well with others
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
	<1169726842.719104.304300@v45g2000cwv.googlegroups.com>
	<wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
	<17848.60341.346203.660506@montanaro.dyndns.org>
Message-ID: <loom.20070129T192409-510@post.gmane.org>


> Andy Dustman, the author of the package is quite responsive to requests
> raised in the mysql-python forums on SourceForge
> (http://sourceforge.net/forum/?group_id=22307).  If you have problems with
> MySQLdb, bring them up there.  I'm sure Andy will respond.

I apologize in advance for beating this dead horse...  This morning  a
possible bug was reported in MySQLdb.  Andy determined it was indeed a bug,
had a fix checked into the source repository in a couple hours and reported
that it would be in the next 1.2 beta release.

Skip




From spam at chezmarshall.freeserve.co.uk  Fri Jan 19 16:41:53 2007
From: spam at chezmarshall.freeserve.co.uk (Robert Marshall)
Date: Fri, 19 Jan 2007 21:41:53 +0000
Subject: Determining when a file is an Open Office Document
References: <eop5ci$et5$1@solaris.cc.vt.edu>
	<mailman.2886.1169169738.32031.python-list@python.org>
	<pan.2007.01.19.12.00.44.879748@REMOVE.THIS.cybersource.com.au>
Message-ID: <m17ivihexq.fsf@chezmarshall.freeserve.co.uk>

On Fri, 19 Jan 2007, Steven D'Aprano wrote:

> On Fri, 19 Jan 2007 12:22:04 +1100, Ben Finney wrote:
> 
>> tubby <tubby at bandaheart.com> writes:
>> 
>>> Silly question, but here goes... what's a good way to determine
>>> when a file is an Open Office document? I could look at the file
>>> extension, but it seems there would be a better way.
>> <snip>
>> The Unix 'file' command determines the type of a file by its
>> contents, not its name. This functionality is essentially a
>> database of "magic" byte patterns mapping to file types,
> 
> Ah, another lousy, unreliable way to make a definite statement about
> the actual contents of a file. Looking at magic bytes inside a file
> is hardly bullet-proof (although file seems to be moderately
> reliable in practice, at least under Linux).
> 
> Simple example: is the file consisting of two bytes "x09x0A" meant
> to be a text file with a tab and a newline, or a binary file
> consisting of a single two-byte int? There's no way to tell just
> from the contents.  

And see for example the problem that development versions of emacs is
(were?) having with C files that started #define and were then treated
as graphics files!

http://thread.gmane.org/gmane.emacs.devel/64823/focus=65228


Robert
-- 
La grenouille songe..dans son ch?teau d'eau
Links and things http://rmstar.blogspot.com/


From deets at nospam.web.de  Fri Jan 19 12:42:54 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 19 Jan 2007 18:42:54 +0100
Subject: confused on python rpc with apache, is it possible?
References: <mailman.2912.1169227938.32031.python-list@python.org>
Message-ID: <51ce8uF1k0tl5U1@mid.uni-berlin.de>

krishnakant Mane wrote:

> hello all.
> I will like to know if the following combination is possible.
> I have looked around on google and did not find any thing productive
> so bothering the list: sorry.
> I am developing a distributed application which will have 3 layers
> namely the thin client written in wxpython, an application layer on a
> server and a database server of course.  database and application
> server will be on same physical machine.
> what I want to know is if I can use python as the base for developing
> the application layer as an rpc server  and use apache server to
> handle http remote procedure requests from the client?
> if yes then what basic configuration settings I will need?
> I believe I must first have apache recognise python interpreter and
> then do some settings in apache so that it knows that what is
> happening is not a web page request but an xml-rpc application created
> in python.
> can some one guide me?

I'm unclear why you want the apache in there in the first place. Why don't
you just create an e.g. twisted-based XMLRPC-server, and simply let that
run? What is the apache intended for?

Diez




From baur79 at gmail.com  Wed Jan  3 04:27:23 2007
From: baur79 at gmail.com (baur79)
Date: 3 Jan 2007 01:27:23 -0800
Subject: how to use execfile with argument under windows
In-Reply-To: <ene5rk$hu6$03$1@news.t-online.com>
References: <1167757591.465076.314700@h40g2000cwb.googlegroups.com>
	<ene5rk$hu6$03$1@news.t-online.com>
Message-ID: <1167816443.596799.66060@a3g2000cwd.googlegroups.com>

os.system() solve my problem

thanks you guys and happy new year

with best wishes from Kazakhstan / Shymkent city / sodbisystems.kz


On Jan 2, 11:49 pm, Peter Otten <__pete... at web.de> wrote:
> baur79 wrote:
> > i need to execute this command line (different source for n times)
>
> > filename.exe -type png -source sourcearg -file filename.png
> > i try with python (python script and filename.exe in same directory)
> > execfile("filename.exe -type png -source sourcearg -file filename.png")That does not do what you think it does, see
>
> http://docs.python.org/lib/built-in-funcs.html#l2h-26
>
> You need os.system() or, for more complex applications, the subprocess
> module.
> 
> Peter



From bj_666 at gmx.net  Fri Jan 12 13:24:43 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 12 Jan 2007 19:24:43 +0100
Subject: What is a perl hash in python
References: <mailman.2653.1168622715.32031.python-list@python.org>
Message-ID: <pan.2007.01.12.18.24.42.132067@gmx.net>

In <mailman.2653.1168622715.32031.python-list at python.org>, Karyn Williams
wrote:

> I am new to Pyton. I am trying to modify and understand a script someone
> else wrote. I am trying to make sense of the following code snippet. I know
> line 7 would be best coded with regex.

What is line 7 in the snippet?

> I first would like to understand what was coded originally. thelistOut
> looks like a hash to me (I'm more familiar with perl).

It's a list which contains tuples.  Each tuple contains an integer and a
list with one string that looks like a pathname.

> Perhaps someone could translate from perl to python for me - not in code
> but just in concept.

Which Perl?  You gave us Python!?

> Here is the code. This script is reading the list thelistOut and then
> removing any items in RSMlist and taking the remainder and putting them
> in graphAddressOut with the formatting.

There's nothing removed from `thelistOut`.  Names where the
filename/basename without the extension is in `RSMList` are not processed
and added to `outputOut`.

> This is a SAMPLE of what is in the lists referenced below in the loop:
> 
> 
> thelistOut = [(632,
> ['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_9.log']), (145,
> ['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_13.log']), (0,
> ['/usr/local/www/data-dist/mrtg/main/test/172.16.0.23_5.log'])]
> 
> RSMList = ['172.16.0.1_1', '172.16.0.1_2', '172.16.0.1_3',
> '172.16.0.1_4', '172.16.0.1_5']
> 
> 
> 
> #--------------------------Loop 1 -------------------------
>        
>     w = 0
>     while w < 45:

The loop looks odd.  Is it really a literal 45 here or are all elements of
`thelistOut` processed?  Then a for loop over the list if you don't need
`w` for something other than indexing into the list or an `xrange()`
object are much cleaner than using a while loop and updating the counter
manually. That the second element of the tuple seems to be always a list
with one item looks odd too.

>        fileOut = string.split(thelistOut[w][1][0],".log")
>        fileOutSplitedCommon = string.split(fileOut[0], "main/")
>        fileOut2D = string.split(fileOutSplitedCommon[1], "/")
>        fileOut = string.split(fileOut[0],"data-dist")

This might be more readable and understandable if `os.path.splitext()` and
`os.path.split()` where used.

>        if fileOut2D[1] in RSMList:
>           w = w + 1
>           continue

Might be cleaner to negate the test and use the remaining code as body of
that ``if`` statement.

>        graphAddressOut = tag1 + logUrl + fileOut[1] + extention1 + tag2
>        +
> "<b>SWITCH: " + string.swapcase(fileOut2D[0]) + "&nbsp;&nbsp;& nbsp;PORT
> ID: " + fileOut2D[1] + "</b><br>" + imgTitleTag + imgTag1 + logUrl +
> fileOut[1] + extention2 + imgTag2 + tag3 + tag5
>        outputOut.append(graphAddressOut)
>        strOut = strOut + graphAddressOut

That's an unreadable mess.  Better use string formatting.

And last but not least: a hash is called dictionary in Python.

Ciao,
	Marc 'BlackJack' Rintsch


From gagsl-py at yahoo.com.ar  Tue Jan 16 21:25:52 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 16 Jan 2007 23:25:52 -0300
Subject: Regex Question
In-Reply-To: <1168976209.504793.51890@38g2000cwa.googlegroups.com>
References: <mailman.2540.1168446078.32031.python-list@python.org>
	<eo8vod$emn$1@zinnia.noc.ucla.edu>
	<1168976209.504793.51890@38g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070116231540.0466dbd0@yahoo.com.ar>

At Tuesday 16/1/2007 16:36, Bill  Mill wrote:

> > py> import re
> > py> rgx = re.compile('1?')
> > py> rgx.search('a1').groups()
> > (None,)
> > py> rgx = re.compile('(1)+')
> > py> rgx.search('a1').groups()
>
>But shouldn't the ? be greedy, and thus prefer the one match to the
>zero? This is my sticking point - I've seen that plus works, and this
>just confuses me more.

Perhaps you have misunderstood what search does.
search( pattern, string[, flags])
         Scan through string looking for a location where the regular 
expression pattern produces a match

'1?' means 0 or 1 times '1', i.e., nothing or a single '1'.
At the start of the target string, 'a1', we have nothing, so the re 
matches, and returns that occurrence. It doesnt matter that a few 
characters later there is *another* match, even if it is longer; once 
a match is found, the scan is done.
If you want "the longest match of all possible matches along the 
string", you should use findall() instead of search().


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From hpsekhon at googlemail.com  Mon Jan  1 18:43:39 2007
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Mon, 1 Jan 2007 23:43:39 +0000
Subject: How do I add users using Python scripts on a Linux machine
In-Reply-To: <qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
Message-ID: <4f45772d0701011543w5cc27f84q165ae60bc657d8e9@mail.gmail.com>

That is shell scripting with a python layer on top. Is there a
specific reason you have to use python? Why not just use shell, that's
what it's designed for? Unless you have some complex maths/networking
requirement or something on top.

-h

On 01/01/07, Daniel Klein <danielkleinad at gmail.com> wrote:
> On 1 Jan 2007 11:33:42 -0800, "Ramdas" <ramdaz at gmail.com> wrote:
>
> >How do I add users using Python scripts on a Linux machine?
> >
> >Someone has a script?
>
> This should be as easy as something like:
>
> os.system("/usr/sbin/useradd -m -d /home/newuser -s /bin/ksh")
>
> Dan
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Hari Sekhon


From arkanes at gmail.com  Tue Jan 23 10:24:22 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 23 Jan 2007 09:24:22 -0600
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <45b6231b$1_2@news.bluewin.ch>
References: <45b6231b$1_2@news.bluewin.ch>
Message-ID: <4866bea60701230724y3a51bc31p9970075f99b70d05@mail.gmail.com>

On 1/23/07, Boris Borcic <bborcic at gmail.com> wrote:
> Hello,
>
> I am trying to use UI Automation to drive an MS Windows app (with pywinauto).
>
> I need to scrape the app's window contents and use some form of OCR to get at
> the texts (pywinauto can't get at them).
>
> As an alternative to integrating an OCR engine, and since I know the fonts and
> sizes used to write on the app's windows, I reasoned that I could base a simple
> text recognition module on the capability to drive MSWindows text rendering - eg
> to generate pixmaps of texts I expect to find in the driven app's windows, exact
> to the pixel.
>
> The advantage of that approach would be exactitude and self-containment.
>
> I've verified manually inside an Idle window, that indeed I could produce
> pixmaps of expected app texts, exact to the pixel (with Tkinter+screen capture
> at least).
>
> I could use help to turn this into a programmable capability, ie : A simple -
> with Tkinter or otherwise - way to wrap access to the MS Windows UI text
> rendering engine, as a function that would return a picture of rendered text,
> given a string, a font, a size and colors ?
>
> And ideally, without interfering with screen contents ?
>
> Thanks in advance for any guidance,
>
> Boris Borcic

There are actually several different text rendering methods (and 2 or
more totally different engines) and they will give different results,
so if you want a fully generic solution that could be quite difficult.
However, it sounds like this is for a specific purpose.

Using the pywin32 modules to directly access the appropriate windows
API calls will be the most accurate. It will be fairly complicated and
you'll require knowledge of the win32 api to do it. You could also use
wxPython, which uses what will probably be the right API and will take
less code than win32 will. I'd suggest this if you aren't familiar
with the win32 API.

PyQt uses it's own text rendering engine, as far as I know, so it is
less likely to generate correct bitmaps. I'm not sure at what level
tkinters text drawing is done.

Using either win32 or wxPython you will be able to produce bitmaps
directly, without needing to create a visible window.


Some quick & dirty wxPython code

def getTextBitmap(text, font, fgcolor, bgcolor):
    dc = wx.MemoryDC()
    dc.SetFont(font)
    width, height= dc.GetTextExtent(text)
    bmp = wx.EmptyBitmap(width, height)
    dc.SelectObject(bmp)
    dc.SetBackground(wx.Brush(bgcolor))
    dc.Clear()
    dc.SetTextBackground(bgcolor)
    dc.SetTextForeground(fgcolor)
    dc.DrawText(text, 0, 0)
    dc.SelectObject(wx.NullBitmap)
    return bmp


Raw win32 code will look similar but will be much more verbose.


From david at boddie.org.uk  Thu Jan 25 16:46:51 2007
From: david at boddie.org.uk (David Boddie)
Date: Thu, 25 Jan 2007 22:46:51 +0100
Subject: pdf to text
References: <epb638$gd4$1@solaris.cc.vt.edu>
Message-ID: <86714$45b9254c$54d1d767$3741@news.chello.no>

On Thursday 25 January 2007 22:05, tubby wrote:

> I know this question comes up a lot, so here goes again. I want to read
> text from a PDF file, run re searches on the text, etc. I do not care
> about layout, fonts, borders, etc. I just want the text. I've been
> reading Adobe's PDF Reference Guide and I'm beginning to develop a
> better understanding of PDF in general, but I need a bit of help... this
> seems like it should be easier than it is.

It _seems_ that way. ;-)

One of the more promising suggestions for a way to solve this came
up in a comp.lang.python thread last year:

http://groups.google.com/group/comp.lang.python/msg/cb6c97a44ce4cbe9?dmode=source

Basically, if you have access to the pdftotext command on a system
that supports xpdf, you should be able to get something reasonable
out of a PDF file.

> I know the text is compressed... that it would have stream and endstream
> makers and BT (Begin Text) and ET (End Text) and that the uncompressed
> text is enclosed in parenthesis (this is my text). Has anyone here done
> this in a simple fashion? I've played with the pyPdf library some, but
> it seems overly complex for my needs (merge PDFs, write PDFs, etc). I
> just want a simple PDF text extractor.

The pdftotext tool may do what you want:

  http://www.foolabs.com/xpdf/download.html

Let us know how you get on with it.

David


From http  Wed Jan 24 16:07:16 2007
From: http (Paul Rubin)
Date: 24 Jan 2007 13:07:16 -0800
Subject: Simple Matrix class
References: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>
	<mailman.3049.1169600368.32031.python-list@python.org>
	<1169602411.917985.89840@l53g2000cwa.googlegroups.com>
	<mailman.3051.1169604934.32031.python-list@python.org>
	<1169617221.481444.135820@v45g2000cwv.googlegroups.com>
	<mailman.3094.1169659321.32031.python-list@python.org>
	<1169664540.120687.211350@s48g2000cws.googlegroups.com>
	<mailman.3108.1169668074.32031.python-list@python.org>
	<1169670271.547292.141110@l53g2000cwa.googlegroups.com>
Message-ID: <7xodooi16j.fsf@ruckus.brouhaha.com>

"Paul McGuire" <ptmcg at austin.rr.com> writes:
> Dang, I thought I was testing the results sufficiently!  What is the
> accuracy problem?  In my test cases, I've randomly created test
> matrices, inverted, then multiplied, then compared to the identity
> matrix, with the only failures being when I start with a singular
> matrix, which shouldn't invert anyway.

There's a lot of ill-conditioned matrices that you won't hit at
random, that aren't singular, but that are nonetheless very stressful
for numerical inversion.  The Hilbert matrix a[i,j]=1/(i+j+1) is a
well known example.

If you're taking exponential time to invert matrices (sounds like
you're recursively using Cramer's Rule or something) that doesn't
begin to be reasonable even for very small systems, in terms of
accuracy as well as speed.  It's a pure math construct that's not of
much practical value in numerics.

You might look at the Numerical Recipes books for clear descriptions
of how to do this stuff in the real world.  Maybe the experts here
will jump on me for recommending those books since I think the serious
numerics crowd scoffs at them (they were written by scientists rather
than numerical analysts) but at least from my uneducated perspective,
I found them very readable and well-motivated.


From pjmlp at progtools.org  Thu Jan 11 10:43:45 2007
From: pjmlp at progtools.org (Paulo Pinto)
Date: Thu, 11 Jan 2007 15:43:45 GMT
Subject: What happened to SPE?
Message-ID: <RWsph.46007$Nb2.875778@news1.nokia.com>

Hi,

does anyone know what happened to SPE?

It seems that the address http://pythonide.stani.be
is no longer valid. :(

Thanks in advance,
Paulo 




From sebastien.thur at laposte.net  Thu Jan 18 11:40:56 2007
From: sebastien.thur at laposte.net (seb)
Date: 18 Jan 2007 08:40:56 -0800
Subject: connection to server not accepted (but no error) only after
	several hours
In-Reply-To: <2%trh.15629$X72.10440@newsread3.news.pas.earthlink.net>
References: <1168961973.099821.318920@l53g2000cwa.googlegroups.com>
	<Ip8rh.15194$X72.12298@newsread3.news.pas.earthlink.net>
	<1169021332.523258.192510@s34g2000cwa.googlegroups.com>
	<2%trh.15629$X72.10440@newsread3.news.pas.earthlink.net>
Message-ID: <1169138455.544356.161240@s34g2000cwa.googlegroups.com>

Hi Dennis,

I think I have some new informations.
My system is "blocked" now but the following change make it work again
!!!
I will test it for tonight to be sure of the improvements.

I changed :
               service.bind(("", self.PORT))
to
		service.bind((socket.gethostname(), self.PORT))

The strange thing is that using the "" it works for a few hours.

Regards.
Sebastien.


Dennis Lee Bieber a ?crit :
> On 17 Jan 2007 00:08:52 -0800, "seb" <sebastien.thur at laposte.net>
> declaimed the following in comp.lang.python:
>
> >
> > 1) I have enabled one time server that can be run as a service (R C C
> > time server) and this service is responding correctly, when at the same
> > time (before I kill it ) the python time server is not responding.
> >
>
> 	What behavior do you see if you don't run them as background
> services, but rather from a regular console login?
>
> > 2) I have also tried two python time server downloaded from effbot
> > site. Both are not responding after the "non response from the time
> > server I rn" even for the first interrogation once they are started.
> > (Of course I have killed my time server when I run a new one).
> > Same behaviour no response given but no error neither.
> >
> 	If you've now got a total of three programs that are not reporting
> error conditions, I'd suspect there is something else wrong in the
> system...
>
> > It is only python programs that are listening from the port 37 that are
> > blocked at a certain time.
> > How is it possible (without firewall enabled) ?
> >
> 	What response do you get from the clients attempting to connect to
> this server? (I'd expect a either a flat out "denied" or, for a
> stealthed firewall, a timeout with no response).
>
>
> 	You also have a race condition in your log-file...
>
> > 	a.start()
> > 	a.set_log_file("log_nw.txt")
> > 	a.reset_log_file()
>
> 	It is possible that the thread gets a few connections between the
> .start() and the .set_log_file() and logs them to the default file name.
> Also, it is possible for connections to be logged between the
> .set_log_file() and the .reset_log_file() (where you wipe out the
> contents of the log file).
>
> 	I'd suggest putting the .start() call third in that list. That way
> you create the thread object, but it is not running. Change the log file
> name, wipe out any old contents, and THEN start the thread running.
>
> 	My only other comment would be to add a few wolf-fences... Print
> statements (if running in a console), or more logging messages (you
> might want to make a method out of that internal logging so all you code
> is, say
>
> 		self.slog("message")
>
> and "slog" does that time stamping, and file open/close...
>
> 	By logging each main step (accept, send, close) you might find where
> it stops.
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/



From http  Sun Jan 14 03:59:38 2007
From: http (Paul Rubin)
Date: 14 Jan 2007 00:59:38 -0800
Subject: Threaded for loop
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
	<7xr6ty8ugv.fsf@ruckus.brouhaha.com>
	<1168750192.222440.89450@a75g2000cwd.googlegroups.com>
Message-ID: <7xzm8m9e6d.fsf@ruckus.brouhaha.com>

"John" <weekender_ny at yahoo.com> writes:
> Damn! That is bad news. So even if caclulate is independent for
> (i,j) and is computable on separate CPUs (parts of it are CPU bound,
> parts are IO bound) python cant take advantage of this?

Not at the moment, unless you write C extensions that release the
global interpreter lock (GIL).  One of these days.  Meanwhile there
are various extension modules that let you use multiple processes,
look up POSH and Pyro.


From skip at pobox.com  Thu Jan 25 19:31:48 2007
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 25 Jan 2007 18:31:48 -0600
Subject: The reliability of python threads
In-Reply-To: <7xveiu4xis.fsf@ruckus.brouhaha.com>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
	<ep9t4g$uf$1@gemini.csx.cam.ac.uk>
	<1169751828.986583.47200@j27g2000cwj.googlegroups.com>
	<epb0s7$g2s$1@gemini.csx.cam.ac.uk>
	<1169754601.992058.205640@q2g2000cwa.googlegroups.com>
	<7xsldy7u6f.fsf@ruckus.brouhaha.com>
	<1169758010.223732.272340@k78g2000cwa.googlegroups.com>
	<7xveiu4xis.fsf@ruckus.brouhaha.com>
Message-ID: <17849.19444.535219.412533@montanaro.dyndns.org>


    Paul> I dunno about Nick, I'm saying it's best to assume that it's
    Paul> Poisson and do whatever is necessary to diagnose and fix the bug,
    Paul> and that the voodoo measure you're proposing is not all that
    Paul> likely to help and it will take years to find out whether it helps
    Paul> or not (i.e. restarting after 3 months and going another 3 months
    Paul> without a failure proves nothing).

What makes you think Paddy indicated he wouldn't try to solve the problem?
Here's what he wrote:

    What I'm proposing is that if, for example, a process stops running
    three times in a year at roughly three to four months intervals , and it
    should have stayed up; then restart the server sooner, at aa time of
    your choosing, whilst taking other measures to investicate the error.

I see nothing wrong with trying to minimize the chances of a problem rearing
its ugly head while at the same time trying to investigate its cause (and
presumably solve it).

Skip



From nagle at animats.com  Tue Jan 30 15:05:54 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 30 Jan 2007 20:05:54 GMT
Subject: Convert raw data to XML
In-Reply-To: <1170184059.739808.244660@s48g2000cws.googlegroups.com>
References: <1170124927.718200.225080@m58g2000cwm.googlegroups.com>
	<mailman.3289.1170133211.32031.python-list@python.org>
	<1170184059.739808.244660@s48g2000cws.googlegroups.com>
Message-ID: <CyNvh.1384$zH1.1245@newssvr29.news.prodigy.net>

elrondrules at gmail.com wrote:
> On Jan 29, 8:54 pm, "Gabriel Genellina" <gagsl... at yahoo.com.ar> wrote:
> 
>>En Mon, 29 Jan 2007 23:42:07 -0300, <elrondru... at gmail.com> escribi?:

> the reason I wanted to write it as a file was to parse the file, look 
> for a specific attribute and execute a set of commands based on the 
> value of the attribute.. also i needed to display the output of the 
> http post in a more readable format..

    That's straightforward.  You confused people by asking the
wrong question.  You wrote "Convert raw data to XML", but what
you want to do is parse XML and extract data from it.

    This will do what you want:

	http://www.crummy.com/software/BeautifulSoup/

For starters, try

	from BeautifulSoup import BeautifulStoneSoup
	xmlstring = somexml 	## get your XML into here as one big string
	soup = BeautifulStoneSoup(xmlstring)	# parse XML into tree
	print soup.prettify()	# print out in indented format

"soup" is a tree structure representing the XML, and there are
functions to easily find items in the tree by tag name, attribute,
and such.  Work on the tree, not a file with the text of the indented
output.


				John Nagle


From deets at nospam.web.de  Tue Jan 30 04:47:40 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 30 Jan 2007 10:47:40 +0100
Subject: Explanation about pickle module
References: <1170149840.610362.319690@h3g2000cwc.googlegroups.com>
Message-ID: <528ihsF1lrmsgU3@mid.uni-berlin.de>

raghu wrote:

> can any one explain about pickle i read in the book but they have not
> provided any example for that so please explain with a simple example

Bad google day? Or just to lazy to do it? And what is "the book"? There are
quite a few out there, some about python the language, others about snakes
of the same name. Which one?

http://www.python.org/doc/current/lib/pickle-example.html

Diez


From danb_83 at yahoo.com  Thu Jan  4 20:55:19 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 4 Jan 2007 17:55:19 -0800
Subject: pow() works but sqrt() not!?
In-Reply-To: <enj8b3$crq2$1@zam602.zam.kfa-juelich.de>
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
	<459d0a1c_6@news.bluewin.ch>
	<enj8b3$crq2$1@zam602.zam.kfa-juelich.de>
Message-ID: <1167962119.206674.256350@11g2000cwr.googlegroups.com>

On Jan 4, 10:00 am, "siggi" <smusnmrNOS... at yahoo.com> wrote:
> Thanks for that, too!
>
> Would be interesting to learn how these different algorithms [for pow] influence the
> precision of the result!?

For an integer (i.e., int or long) x and a nonnegative integer y, x**y
is exact:

>>> 1000001 ** 12
1000012000066000220000495000792000924000792000495000220000066000012000001L
(73 significant digits, correctly ending in "000001")

math.pow uses floating-point arithmetic (even if you pass it integers),
and so has limited precision:

>>> print '%.73f' % math.pow(1000001, 12)
1000012000066000238472777842004463257260700063242258506335663988477526016
(Only the first 17 digits are correct.)

For floats, the ** operator does the same thing math.pow does.



From gagsl-py at yahoo.com.ar  Mon Jan 15 18:38:21 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 15 Jan 2007 20:38:21 -0300
Subject: can't get import to work!
In-Reply-To: <8C906E2A183C0C2-B34-FE5@WEBMAIL-RA03.sysops.aol.com>
References: <8C906E2A183C0C2-B34-FE5@WEBMAIL-RA03.sysops.aol.com>
Message-ID: <7.0.1.0.0.20070115203611.05c7bc98@yahoo.com.ar>

At Monday 15/1/2007 14:35, corsairdgr at aol.com wrote:

>from just.for.fun  import Fubar
>This doesn't work.  The following error is displayed:
>     ImportError: No module named  for

You can't have a module named "for", it's a reserved word. Try using 
"For" instead (or any other legal name!).


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From bdesth.quelquechose at free.quelquepart.fr  Fri Jan 12 12:18:13 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 12 Jan 2007 18:18:13 +0100
Subject: ArchGenXML please help
In-Reply-To: <mailman.2651.1168619738.32031.python-list@python.org>
References: <mailman.2651.1168619738.32031.python-list@python.org>
Message-ID: <45a7bc70$0$299$426a34cc@news.free.fr>

tonydevlin a ?crit :
> I am creating a workflow in plone using argouml and archgenxml.  I have been
> following the steps on the site:-
> http://plone.org/documentation/tutorial/anonymously-adding-custom-content-types-with-argouml-and-archgenxml/creating-a-class-and-workflow-with-argouml
> 
> However I am confused at step 9 in creating the class section, where it
> says:
> "Now, save this file as "ProcessImprovement.zargo".  Pull up a command
> prompt and navigate to that directory.  Make sure that you've added the
> ArchGenXML directory to your env path, and type the following:
> C:\Sandbox\Plone\Tutorial>ArchGenXML.py ProcessImprovement.zargo"
> 
> I have saved the file in the location 
> C:\Documents and Settings\Tony\Desktop\Test\ProcessImprovement.zargo
> However I dont know what to type in the python command prompt!!!

Which *python* command prompt ? The author is talking about a shell, 
here (you know, this strange stuff that looks like good ole time DOS...).




From robert.kern at gmail.com  Sat Jan 20 19:32:45 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 20 Jan 2007 18:32:45 -0600
Subject: scipy.optimize.lbfgsb help please!!!
In-Reply-To: <eoubge$pvi$1@gemini.csx.cam.ac.uk>
References: <eotep7$ik$1@gemini.csx.cam.ac.uk>	<mailman.2953.1169333789.32031.python-list@python.org>
	<eoubge$pvi$1@gemini.csx.cam.ac.uk>
Message-ID: <eoucbp$n84$1@sea.gmane.org>

mclaugb wrote:
> Just to clarify--this is a multivariate algorithm. 

Yes. That means that the domain of the objective function is multivariate. The
image is still a scalar.

  RR^n -f-> RR

> I changed the function 
> Permmin to simply take the absolute value of (xmin, ymin) so that it returns 
> one value.  Unfortunately, the error remains--it still returns this error:

Let's take this to the scipy-user list. Can you reduce your code down to a
small, complete example that demonstrates the problem? Without more information,
we can't help you. Also, we'll need to know what version of scipy you are using.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Jan 25 10:31:06 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 25 Jan 2007 16:31:06 +0100
Subject: Please have a look at this class
In-Reply-To: <1169735908.009109.7460@a75g2000cwd.googlegroups.com>
References: <1169735908.009109.7460@a75g2000cwd.googlegroups.com>
Message-ID: <45b8cd37$0$25927$426a74cc@news.free.fr>

antred a ?crit :
> Hello everyone,
> 
> While working on a program I encountered a situation where I'd
> construct a largish data structure (a tree) from parsing a host of
> files and would end up having to throw away parts of my newly built
> tree if a file turned out to contain invalid data. My first thought was
> 'Well, you can always make a deep copy of your tree first, then add new
> data to the copy and revert to the original if you need to.", but as
> this tree can grow very big this is not exactly efficient.
> So my second idea was to come up with a class that offers a very
> limited degree of database-like behavior, meaning you can make changes
> to the object and then decide whether you want to commit those changes
> or roll them back to get back to the original. 

Then you may want to have a look at the zodb (and possibly Durus - it 
has support for transactions too IIRC) instead of reinventing the square 
wheel.


From cinsky at gmail.com  Tue Jan  9 01:39:55 2007
From: cinsky at gmail.com (cinsky at gmail.com)
Date: 8 Jan 2007 22:39:55 -0800
Subject: class unbound method and datetime.datetime.today()
Message-ID: <1168324795.850400.65150@i15g2000cwa.googlegroups.com>

Hi, I got confused when I learned the function datetime.today().

So far I learned, unless an instance is created, it is not possible to
call the class method. For example:

class Foo:
  def foo(self):
    pass

Foo.foo()  # error: unbound method foo().

What makes me confused is that datetime class? in datetime module
provides today() function that returns the datetime object.

>>> import datetime
>>> datetime.datetime.today()
datetime.datetime(2007, 1, 9, 15, 34, 35, 23537)

It looks like that datetime class provides today() method that can be
callable even if it is unbound method. Do I correct?

If it is possible to make that kind of function (looks like static
member function in C++), how can I make that?

Thanks in advance.



From Hieu.D.Hoang at gmail.com  Tue Jan 30 23:08:28 2007
From: Hieu.D.Hoang at gmail.com (Hieu.D.Hoang at gmail.com)
Date: 30 Jan 2007 20:08:28 -0800
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <1170108446.671609.169400@j27g2000cwj.googlegroups.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<epl3la$10g0$1@ulysses.news.tiscali.de>
	<1170088693.768440.26580@h3g2000cwc.googlegroups.com>
	<1170090408.495646.85720@v33g2000cwv.googlegroups.com>
	<1170108446.671609.169400@j27g2000cwj.googlegroups.com>
Message-ID: <1170216508.396176.187780@v33g2000cwv.googlegroups.com>

On Jan 30, 5:07 am, "NoName" <zaz... at gmail.com> wrote:
> WOW! :shock:
>
> in this case:
>
> while 1:i=__import__;print
> i('binascii').b2a_base64(i('os').urandom(6)),;raw_input()
>
> > :)

raw_input can do the job of print
while 1: raw_input(__import__('os').urandom(6).encode('base64'))

And can anyone explain why this is so?
>>> while 1: input(__import__('os').urandom(6).encode('base64'))
...
BgiWdv//

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 0

    ^
SyntaxError: unexpected EOF while parsing

Thank to all, I learned a lot of new things from this thread.

Hieu



From harry.g.george at boeing.com  Wed Jan 24 13:54:34 2007
From: harry.g.george at boeing.com (George, Harry G)
Date: Wed, 24 Jan 2007 10:54:34 -0800
Subject: Python does not play well with others
In-Reply-To: <20070124180439.GA18506@hccnet.nl>
Message-ID: <8CCB8060D46A7A40BC6AB3DC1DCAFABC03599CD1@XCH-NW-8V2.nw.nos.boeing.com>

As always, IMHO...

P-code begat JVM, which begat .NET/Mono-CLI, wherein lives C#.   Thus it
is a deliberately isolated world, much given to reinventing wheels (or
rather recoding them) instead of binding to existing libraries.  So C#
might be a useful tool for anyone forced to live inside that world, but
more or less irrelevant for those who have to interact with the real
world. 

At work my tasks include hooking together lots of COTS tools, on lots of
platforms.  C# doesn't even play the game.

At home my hobbies include lots of different subjects, randomly passing
from one to another, using strictly Open Source Software, and enjoying
the process.  .NET/Mono and C# don't pass either the "lots" or the
"enjoy" tests.   

> -----Original Message-----
> From: egbert [mailto:egbert.bouwman at hccnet.nl] 
> Sent: Wednesday, January 24, 2007 10:05 AM
> To: George, Harry G
> Cc: python-list at python.org
> Subject: Re: Python does not play well with others
> 
> On Wed, Jan 24, 2007 at 06:24:37AM +0000, Harry George wrote:
> > 
> > Perl - excellent modules and bindings for just about everything ...
> > Java - a world of its own.  They reinvent the wheel instead of ...
> > PHP - are we talking web scripts or serious programs?  Are you ...
> > C - the portable assembler.  Solid, trusted, tunable ...
> > C++ - objects tacked onto C; but that didn't work so invent ...
> > Python - it just works.  Same scripts run on every platform ... 
> 
> What about C# ?
> e
> --
> Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 
> 020 6257991 
> ==============================================================
> ==========
> 


From wolfgang.grafen at marconi.com  Wed Jan 31 03:46:56 2007
From: wolfgang.grafen at marconi.com (Wolfgang Grafen)
Date: Wed, 31 Jan 2007 09:46:56 +0100
Subject: Find and replace in a file with regular expression
In-Reply-To: <1170186744.322855.253550@j27g2000cwj.googlegroups.com>
References: <1170186744.322855.253550@j27g2000cwj.googlegroups.com>
Message-ID: <eppj6c$8h1$1@newsfeed.pit.comms.marconi.com>

Just in case you didn't think about it there is a plain replace method for strings

How to quick-search this method with 'dir'
 >>> dir("")
['__add__', '__class__', '__contains__', '__delattr__', '__doc__', '__eq__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__getslice__', '__gt__', '__hash__', '__init__', '__le__', '__len__', '__lt__', '__mod__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', 
'__repr__', '__rmod__', '__rmul__', '__setattr__', '__str__', 'capitalize', 'center', 'count', 'decode', 'encode', 'endswith', 'expandtabs', 'find', 'index', 'isalnum', 'isalpha', 'isdigit', 'islower', 'isspace', 'istitle', 'isupper', 'join', 'ljust', 'lower', 'lstrip', 'replace', 'rfind', 'rindex', 
'rjust', 'rstrip', 'split', 'splitlines', 'startswith', 'strip', 'swapcase', 'title', 'translate', 'upper', 'zfill']

 >>> help("".replace)
Help on built-in function replace:

replace(...)
     S.replace (old, new[, maxsplit]) -> string

     Return a copy of string S with all occurrences of substring
     old replaced by new.  If the optional argument maxsplit is
     given, only the first maxsplit occurrences are replaced.

and now how to apply it:
new_text = open(fileName).read().replace("SOURCE", "REPLACE")

which is the preferred method for a simple task like this.

TOXiC wrote:
> Hi everyone,
> First I say that I serched and tryed everything but I cannot figure 
> out how I can do it.
> I want to open a a file (not necessary a txt) and find and replace a 
> string.
> I can do it with:
> 
> import fileinput, string, sys
> fileQuery = "Text.txt"
> sourceText = '''SOURCE'''
> replaceText = '''REPLACE'''
> def replace(fileName, sourceText, replaceText):

Now how to solve it with a simple regular expression:

 >>> import re
 >>> re_replace = re.compile("SOURCE").sub
 >>>
 >>> txt = "   SOURCE   SOURCE \n   SOURCE  "
 >>>
 >>> print re_replace("REPLACE", txt)
'   REPLACE   REPLACE \n   REPLACE  '
 >>> new_text = re_replace("REPLACE", open(fileName).read())

A regular expression for this task is kind of overkill. Mastering
regular expression is the efford very worth.

Wolfgang Grafen


From felipe.lessa at gmail.com  Sun Jan  7 16:47:10 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 7 Jan 2007 19:47:10 -0200
Subject: how to find the longst element list of lists
In-Reply-To: <Vwdoh.223$L06.180@nntpserver.swip.net>
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
Message-ID: <c2701f5c0701071347n36b1f444hc9673eaf2f0ee96d@mail.gmail.com>

On 1/7/07, Michael M. <michael at mustun.ch> wrote:
> How to find the longst element list of lists?

s1 = ["q", "e", "d"]
s2 = ["a", "b"]
s3 = ["a", "b", "c", "d"]

s = [s1, s2, s3]
s.sort(key=len, reverse=True)
print s[0] is s3
print s[1] is s1
print s[2] is s2

sx1, sx2, sx3 = s
print 'sx1:', sx1
print 'sx2:', sx2
print 'sx3:', sx3

-- 
Felipe.


From david at boddie.org.uk  Tue Jan 16 18:41:27 2007
From: david at boddie.org.uk (David Boddie)
Date: Wed, 17 Jan 2007 00:41:27 +0100
Subject: PyQt: QListviewItemIterator
References: <K4ydnVE5x8iEjzDYRVnzvA@telenor.com>
Message-ID: <54a5f$45ad62a8$54d1d767$17614@news.chello.no>

On Tuesday 16 January 2007 18:57, Tina I wrote:

> I have a QListView with a number of columns. In order to filter the
> output I iterate using QListViewItemIterator looking for the string
> entered by the user (filterString). Currently I do it this way:

[Reformatted code for quoting purposes]

> it = QListViewItemIterator(self.authListView)
> try:
>     while it:
>        item = it.current()
>        if item.text(0).contains(filterString) or \
>           item.text(1).contains(filterString) or \
>           item.text(2).contains(filterString):
>
>            item.setVisible(1)
>        else:
>            item.setVisible(0)
>        it +=1
> except AttributeError:
>     pass
> 
> Basically I iterate through the ListView until it goes beyond the list
> and raise an exception, which I catch. It works but to be honest it
> looks and feels ugly; "Do something until it goes wrong"
> 
> So, question: How can I know I have reached the last item in the
> QListView?

When it.current() returns None. You can rewrite what you already
have like this:

 it = QListViewItemIterator(self.authListView)
 while it.current():
     item = it.current()
     if item.text(0).contains(filterString) or \
        item.text(1).contains(filterString) or \
        item.text(2).contains(filterString):

         item.setVisible(1)
     else:
         item.setVisible(0)
     it += 1

If you don't like calling item.current() twice for some reason,
you could write this:

 it = QListViewItemIterator(self.authListView)
 item = it.current()
 while item:
     if item.text(0).contains(filterString) or \
        item.text(1).contains(filterString) or \
        item.text(2).contains(filterString):

         item.setVisible(1)
     else:
         item.setVisible(0)
     it += 1
     item = it.current()

David


From vertilka at gmail.com  Thu Jan  4 07:50:19 2007
From: vertilka at gmail.com (Vertilka)
Date: 4 Jan 2007 04:50:19 -0800
Subject: Extending Embedded Python and execute external script
Message-ID: <1167915019.940396.322390@s34g2000cwa.googlegroups.com>

What i need from my C application to do ?
1) To execute a python script from file.
2) The python script will call functions in my C application.

According to the answer from Ravi Teja (topic "C app and Python"), I
need to extend embedded python in my C application.

I saw several functions: PyRun_AnyFileExFlags, PyRun_SimpleFileExFlags,
PyRun_FileExFlags.

Questions:
1) Which one should i use in order to achieve what i need ?
2) I couldn't understand the differance betwwen the three ?
3) What is the difference between the "FILE *fp" and "const char
*filename" arguments of these functions. If i give a FILE*, why do i
need to give the file name ?

Tnx,
Vertilka



From ralf at schoenian-online.de  Mon Jan 15 22:59:32 2007
From: ralf at schoenian-online.de (=?ISO-8859-1?Q?Ralf_Sch=F6nian?=)
Date: Tue, 16 Jan 2007 04:59:32 +0100
Subject: Python web app. (advice sought)
In-Reply-To: <mailman.2730.1168853555.32031.python-list@python.org>
References: <45aae51b.0@entanet> <R62949312.665.5091.1@mxextra>
	<mailman.2730.1168853555.32031.python-list@python.org>
Message-ID: <45ac4d95$1@news.arcor-ip.de>

Tim Williams schrieb:
> On 15 Jan 2007 00:52:33 -0800, Torabisu <tpawley at gmail.com> wrote:

> 
> Don't overlook Karrigell either,  with a tiny learning curve its
> always worth consideration, especially if you need rapid development
> and a web server that will sit on top of your exising .py modules.
> 
> www.karrigell.com
> 
> hth :)

I would also like to vote for Karrigell.

BTW: Does anyone knows how to avoid stopping/starting of the webserver 
after changing external libraries? I have some own modules under 
/opt/local/python/lib and import them by extending the path with 
sys.path.append() After changing any file here, I have to restart 
Karrigell.

Ralf Schoenian


From gagsl-py at yahoo.com.ar  Fri Jan 19 14:20:17 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 19 Jan 2007 16:20:17 -0300
Subject: My first try using logger didn't work. Why?
In-Reply-To: <1169233154.076956.231540@q2g2000cwa.googlegroups.com>
References: <1169221734.071338.107190@11g2000cwr.googlegroups.com>
	<1169224835.820468.316040@v45g2000cwv.googlegroups.com>
	<1169233154.076956.231540@q2g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070119160825.01da8b80@yahoo.com.ar>

At Friday 19/1/2007 15:59, CedricCicada at gmail.com wrote:

>One of the problems I was laboring under was that I did not know where
>to go to find the official documentation.  Thanks for that link too!

You already have it installed; look into your python install 
directory, under "doc"

 From inside the interpreter, you can use help():

py> import logging.handlers
py> help(logging.handlers.NTEventLogHandler)
Help on class NTEventLogHandler in module logging.handlers:

class NTEventLogHandler(logging.Handler)
  |  A handler class which sends events to the NT Event Log. Adds a
  |  registry entry for the specified application name. If no dllname is
  |  provided, win32service.pyd (which contains some basic message [...]

Try help("logging"), help("modules logging"), help(any object), help("if")

And you can read the documentation online at http://www.python.org/doc/


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From bytter at gmail.com  Tue Jan 30 10:05:23 2007
From: bytter at gmail.com (Hugo Ferreira)
Date: Tue, 30 Jan 2007 15:05:23 +0000
Subject: Synchronous shutil.copyfile()
Message-ID: <4e8efcf50701300705v2b787ec4h1c539cab8068d58c@mail.gmail.com>

Hi there,

I have a problem. I'm using calling shutil.copyfile() followed by
open(). The thing is that most of the times open() is called before
the actual file is copied. I don't have this problem when doing a
step-by-step debug, since I give enough time for the OS to copy the
file, but at run-time, it throws an exception.

Is there anyway to force a sync copy of the file (make python wait for
the completion)?

Thanks in advance!

Hugo Ferreira


From bruno.desthuilliers at websiteburo.com  Wed Jan 24 09:40:27 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Wed, 24 Jan 2007 15:40:27 +0100
Subject: Thoughts on using isinstance
In-Reply-To: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
Message-ID: <45b76f9b$0$16806$426a74cc@news.free.fr>

abcd a ?crit :
> In my code I am debating whether or not to validate the types of data
> being passed to my functions.  For example
> 
> def sayHello(self, name):
>     if not name:
>         rasie "name can't be null"
>     if not isinstance(name, str):
>         raise "name must be a string"
>     print "Hello " + name
> 
> Is the use of isinstance a "bad" way of doing things? 

Mostly, yes. Python is dynamically typed (well, it's dynamic all the 
way...), and fighting against the language is a bad idea.

Also, since the use of an object of non-compatible type would usually 
raise an exception (and while we're at it, avoid using strings as 
exceptions - better to use some Exception class), you don't actually 
gain anything.

> just curious how you might handle this type of situation (other than
> not validating at all).

There are mostly 2 cases :
1/ you're getting data from the outside world. Here, you have to be 
*very* careful, and you usually need more than simple validation. Good 
news is that we have modules like FormEncode designed to handle this case.

2/ you're getting 'data' from within your Python program. If you 
correctly applied 1/, whatever comes in should be ok - that is, unless 
you have a programmer error !-). But then, you'll usually have a nice 
exception and traceback (or better unit tests failures), so you can fix 
the problem immediatly.

Now there are *a few* corner cases where it makes sens to check what has 
been passed to a function - either because there are very strict and 
stable requirements here, or because the function can accept different 
kinds of objects, but needs to handle them in distinct ways.

MVHO is that the less code the better. As a matter of fact, trying to 
'protect' your function, you introduced a syntax error, that would not 
have been here if you had just wrote the simplest thing:

def say_hello(who):
   print "Hello", who

My 2 cents...


From martin at v.loewis.de  Thu Jan 25 01:29:05 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 25 Jan 2007 07:29:05 +0100
Subject: raise UnicodeError, "label too long"
In-Reply-To: <1169684719.607504.307310@l53g2000cwa.googlegroups.com>
References: <1169672223.231030.262610@l53g2000cwa.googlegroups.com>
	<pan.2007.01.24.21.23.25.331322@gmx.net>
	<1169675004.099912.79520@v33g2000cwv.googlegroups.com>
	<45B7D4F7.9020308@v.loewis.de>
	<1169684719.607504.307310@l53g2000cwa.googlegroups.com>
Message-ID: <45B84E31.4090605@v.loewis.de>

Flavio schrieb:
> something like this, for instance:
> http://.wikipedia.org/wiki/Copper%28II%29_hydroxide
> 
> but even url with any non-ascii characters such as this
> 
> http://.wikipedia.org/wiki/Ammonia
> 
> also fail when passed to urlopen :
> File "/usr/lib/python2.4/encodings/idna.py", line 72, in ToASCII
>     raise UnicodeError, "label too long"
> UnicodeError: label too long
> 
> very strange, because I tried other unicode urls  from the python
> console like this

It's the host name that starts with a dot that makes it fails:

py> u".wikipedia.org".encode("idna")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "encodings/idna.py", line 163, in encode
  File "encodings/idna.py", line 72, in ToASCII
UnicodeError: label too long
py> u"wikipedia.org".encode("idna")
'wikipedia.org'

The exception is certainly misleading; I'll have to find out
whether there is a bug beyond that (i.e. whether host names
with empty labels should be accepted).

Regards,
martin


From webraviteja at gmail.com  Tue Jan  2 13:18:45 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 2 Jan 2007 10:18:45 -0800
Subject: How do I add users using Python scripts on a Linux machine
In-Reply-To: <ene0j1$6nk$03$1@news.t-online.com>
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
	<ene0j1$6nk$03$1@news.t-online.com>
Message-ID: <1167761925.552432.305350@k21g2000cwa.googlegroups.com>

> >
> > How about invoking scripts with SUID root set?
>
> Linux seems to ignore SUID bit on scripts:

Yes. My bad. The work around was to use native launchers. I don't
remember the details. Perhaps with the interpreter embedded to launch
it in-process and to hard code the script paths (or at least a config
file/script pointing to them) for security.

> Anyway, you should definitely think about security issues. Not all
> people out there are friendly...

I agree. SUID is often risky.

Web applications such as webmin that do administrative functions
through a web interface require extra precautions for security such as
restricting access to specific IPs.



From bjourne at gmail.com  Thu Jan 25 04:08:01 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Thu, 25 Jan 2007 10:08:01 +0100
Subject: Python does not play well with others
In-Reply-To: <xqxirex3psq.fsf@cola3.ca.boeing.com>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<xqxirex3psq.fsf@cola3.ca.boeing.com>
Message-ID: <740c3aec0701250108m48d80ef7k743cb5e13dc92bba@mail.gmail.com>

On 1/24/07, Harry George <harry.g.george at boeing.com> wrote:
> Python - it just works.  Same scripts run on every platform.  Bindings
> available to every C/C++/FORTRAN library I've needed so far.  Often
> the bindings are not complete, but oddly enough the binding developers
> have chosen to do just the functions I need, so who cares.  A clean
> architecture for adding more function bindings if I'm so inclined.

Although that is true on Linux, it is often not the case on Windows.
Sometimes the binding lacks a binary for the minor version of Python
you use or it depends on something which depends on something which
sometimes is only available in source form. Still, I would rather take
Python's approach than Java's.

-- 
mvh Bj?rn


From Jeff.Demel at JavelinDirect.com  Thu Jan 11 17:42:34 2007
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Thu, 11 Jan 2007 16:42:34 -0600
Subject: Learning Python book, new edition?
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734C195@DMSP-MSG-EVS01.mail.pvt>

John wrote:
>So what happens with google bots etc... Information provided 
>in the email could be helpful to others that are NOT the original 
> recipient.  And what happens to the archive stuff?

I will forward your response to our crack legal department.  Perhaps
they can help you with your very astute questions.

-Jeff
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From half.italian at gmail.com  Thu Jan 25 04:46:06 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 25 Jan 2007 01:46:06 -0800
Subject: Fast Imaging for Webserver
In-Reply-To: <1169707586.701908.32860@v45g2000cwv.googlegroups.com>
References: <1169707586.701908.32860@v45g2000cwv.googlegroups.com>
Message-ID: <1169718365.937350.79270@13g2000cwe.googlegroups.com>


On Jan 24, 10:46 pm, "Prateek" <sure... at gmail.com> wrote:
> Hi. I'm creating a web-application using CherryPy 2.2.1. My application
> needs to process images (JPG/PNG files) to
>
> 1) create thumbnails (resize them)
> 2) overlay them on a custom background (a simple frame)
> 3) Overlay 'badges' (small 16x16 images) on top of the final thumbnail
>
> I am using PIL 1.1.5 which I have custom compiled on my development
> machine (MacBook Pro 2.33Ghz Core Duo)..
> I am using im.thumbnail for step 1 and im.paste for steps 2 and 3.
>
> The problem is that this thing is just way too slow.
> For ab -n 1000 -C session_id=2f55ae2dfefa896f67a80f73045aadfa4b4269f1http://localhost:8080/imaging/icon/def/128/255(where def is the name
> of the image - default in this case - 128 is the size in pixels and 255
> is the background color), I am getting:
>
> Document Path:          /imaging/icon/def/128/255
> Document Length:        14417 bytes
>
> Concurrency Level:      1
> Time taken for tests:   18.664 seconds
> Complete requests:      1000
> Failed requests:        0
> Broken pipe errors:     0
> Total transferred:      14680000 bytes
> HTML transferred:       14417000 bytes
> Requests per second:    53.58 [#/sec] (mean)
> Time per request:       18.66 [ms] (mean)
> Time per request:       18.66 [ms] (mean, across all concurrent
> requests)
> Transfer rate:          786.54 [Kbytes/sec] received
>
> FYI: This request returns a PNG image (image/png) and not html
>
> My understanding is that the problem is either with the CherryPy setup
> (which is likely because even in other cases, i don't get much more
> than 65 requests per second) or PIL itself (even though I'm caching the
> background images and source images)
>
> Does anyone have a better solution? Is there a faster replacement for
> PIL?
>
> Thanks in advance.
> Prateek

Check out the mac CoreGraphics bindings.  Not sure if it will be any
faster, but it can do what you want.

http://www.macdevcenter.com/pub/a/mac/2004/03/19/core_graphics.html

~Sean DiZazzo



From bborcic at gmail.com  Wed Jan 24 06:29:09 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Wed, 24 Jan 2007 12:29:09 +0100
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <4866bea60701230724y3a51bc31p9970075f99b70d05@mail.gmail.com>
References: <45b6231b$1_2@news.bluewin.ch>
	<4866bea60701230724y3a51bc31p9970075f99b70d05@mail.gmail.com>
Message-ID: <ep7fva$7v9$1@sea.gmane.org>

Chris Mellon wrote:
 > On 1/23/07, Boris Borcic <bborcic at gmail.com> wrote:
 >> ...A simple -
 >> with Tkinter or otherwise - way to wrap access to the MS Windows UI text
 >> rendering engine, as a function that would return a picture of rendered text,
 >> given a string, a font, a size and colors ?
...
 >
 > There are actually several different text rendering methods (and 2 or
 > more totally different engines) and they will give different results,
 > so if you want a fully generic solution that could be quite difficult.
 > However, it sounds like this is for a specific purpose.

Indeed.

 >
 > ...You could also use
 > wxPython, which uses what will probably be the right API and will take
 > less code than win32 will. I'd suggest this if you aren't familiar
 > with the win32 API.

Thanks for your guidance and quick code, I am going to try that.

Boris Borcic



From thn at mail.utexas.edu  Mon Jan  8 13:59:23 2007
From: thn at mail.utexas.edu (Thomas Nelson)
Date: 8 Jan 2007 10:59:23 -0800
Subject: newbieee
In-Reply-To: <1168280831.323496.277020@38g2000cwa.googlegroups.com>
References: <1168280831.323496.277020@38g2000cwa.googlegroups.com>
Message-ID: <1168282763.275854.145430@v33g2000cwv.googlegroups.com>


lee wrote:
> I getting familiarised with python...can any one suggest me a good
> editor available for python which runs on windows xp....one more
> request guys...can nyone tell me a good reference manual for python..

I think vim is a very good editor for python, and it's certainly
available for windows xp.

O'reilly has a book called Programming Python that covers much of the
standard library and how to use it for complex tasks.  It may be out of
date by now, though.  Truthfully the only python references I use
regularly are the online docs and this list.

hth,
THN



From mkeller.dci at gmail.com  Thu Jan 25 07:37:34 2007
From: mkeller.dci at gmail.com (mukappa)
Date: 25 Jan 2007 04:37:34 -0800
Subject: Subclassing cElementTree.XMLTreeBuilder
In-Reply-To: <mailman.3146.1169717585.32031.python-list@python.org>
References: <1169695233.737016.95950@a75g2000cwd.googlegroups.com>
	<mailman.3146.1169717585.32031.python-list@python.org>
Message-ID: <1169728653.989858.218650@a75g2000cwd.googlegroups.com>

On Jan 25, 4:32 am, "Fredrik Lundh" <fred... at pythonware.com> wrote:
> "mukappa" wrote:
> > Is it possible to subclass cElementTree.XMLTreeBuilder?no, it's a factory function.  if you need to extend it, you'll have to wrap it.  but
> I'm not sure I see the use case; what is it you're trying to do here?
>
> </F>

I'm trying to parse xmpp stanzas coming in over a socket.  Since
cElementTree is
more efficient, I would like to use it when available.

Here is what I have now:

import logging
from elementtree import ElementTree

class StanzaTreeBuilder(ElementTree.XMLTreeBuilder):
    """Capture stanza elements (<stream> children) from parser events.

    Private methods are lifted from the old
        elementtree.XMLTreeBuilder.FancyTreeBuilder
    """

    def __init__(self, html=0):
        """Initialize state variables."""
        ElementTree.XMLTreeBuilder.__init__(self, html)
        self._parser.StartNamespaceDeclHandler = self._start_ns
        self._parser.EndNamespaceDeclHandler = self._end_ns
        self.namespaces = []
        self.level = 0
        self.stanza = None
        self.streamelem = None

    def _start(self, tag, attrib_in):
        elem = ElementTree.XMLTreeBuilder._start(self, tag, attrib_in)
        self.start(elem)

    def _start_list(self, tag, attrib_in):
        elem = ElementTree.XMLTreeBuilder._start_list(self, tag,
attrib_in)
        self.start(elem)

    def _end(self, tag):
        elem = ElementTree.XMLTreeBuilder._end(self, tag)
        self.end(elem)

    def _start_ns(self, prefix, value):
        self.namespaces.insert(0, (prefix, value))

    def _end_ns(self, prefix):
        assert self.namespaces.pop(0)[0] == prefix, "implementation
confused"

    def start(self, element):
        """Track nesting level (capture open <stream> on first
call)."""
        logging.debug("start(%s): %s" %
                (self.level, ElementTree.tostring(element)))
        if self.streamelem is None:
            assert element.tag == "http://etherx.jabber.org/streams"
            self.streamelem = element
            self.stanza = element
        self.level += 1

    def end(self, element):
        """Capture stanza when nesting level is 1."""
        self.level -= 1
        if self.level == 1:
            self.stanza = element
            self.streamelem.clear()
        logging.debug("end(%s): %s" %
                (self.level, ElementTree.tostring(element)))

def stanzagen(socket):
    """Yield open <stream ...> on first call, then complete stanzas.

    Caller needs 'id' from the opening <stream>, then he needs stanzas,
    one per call.  Works by parsing the socket one byte at a time, and
    yielding complete stanza at earliest opportunity (or None if none
    waiting), exits on EOF.  Stanzas are returned as ElementTree
Elements
    to give them a natural pythonic feel.

    see
http://online.effbot.org/2004_12_01_archive.htm#element-generator"""
    p = StanzaTreeBuilder()
    data = None
    while 1:
        try:
            data = socket.recv(1)
            if not data:
                logging.info("EOF from peer")
                p.close()
                break
            p.feed(data)
            if p.stanza is not None:
                yield p.stanza
                p.stanza = None
                data = None
        except:
            if data is not None:
                logging.error("error reading: %s" % (data))
                raise
            else:
                yield None



From mail at microcorp.co.za  Sat Jan 13 00:38:39 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 13 Jan 2007 07:38:39 +0200
Subject: General Question About Python
References: <1168254451.098796.144790@42g2000cwt.googlegroups.com><1168336603.962731.5470@11g2000cwr.googlegroups.com><1168337298.574881.121470@i15g2000cwa.googlegroups.com>
	<1168586849.047301.301680@s34g2000cwa.googlegroups.com>
Message-ID: <008001c736db$0ca49980$03000080@hendrik>


"Torabisu" <tpawley at gmail.com> wrote:


> 
> billie wrote:
> > Torabisu wrote:
> >
> > > Its quite weird, we're looking for Python skills but are battling to
> > > find at the moment...  Normally Python on its own will probably not
> > > land you a job, but the last two companies I've worked for are doing
> > > indepth Python development, so hopefully the tables are turning a bit.
> >
> > I can tell the same for Italy.
> > Where are you from?
> 
> Cape Town, South Africa.  There is a strong Unix following here, but
> more on the System Administration side, not really the software
> development side with regards to Python.  Python more being used for
> task automation and shell scripting.

What do you want done? - I am only a thousand miles away...

- Hendrik



From stou.sandalski at gmail.com  Thu Jan 18 19:12:19 2007
From: stou.sandalski at gmail.com (Stou Sandalski)
Date: 18 Jan 2007 16:12:19 -0800
Subject: Pass 'this' to a python script in an extended application
Message-ID: <1169165539.529443.289120@v45g2000cwv.googlegroups.com>

Hi,

I have an application consisting of a main C++ class (and other
classes) stored inside a DLL.  The application uses a small main
executable that links against the main DLL, then initializes and runs
the core class.  The python bindings are inside a .pyd module that also
links against the core DLL file.  I was able to generate the python
bindings against the core class using SWIG.   The application can now
be run either by the bootstrap executable or through the python console
like:

import foo
s = foo.MainClass()
s.run();

This is awesome, however I want to be able to launch python scripts
from within the application itself (no matter how it was started) and
supply these scripts with a "pointer" to the already initialized main
Class something like:

import foo

s = foo.GetMainClass()
s.someMethod().

I found this:

http://docs.python.org/ext/extending-with-embedding.html

but the problem is that I don't know how to "give" the python
interpreter a "pointer" to my class that will be compatible with the
already defined bindings that SWIG generated.  I am trying to keep the
core application dll from knowing about the .pyd extension module.
 
I apologize if this post belongs in a group dedicated to SWIG. 

Stou



From guettli.usenet at thomas-guettler.de  Tue Jan 30 10:44:30 2007
From: guettli.usenet at thomas-guettler.de (Thomas Guettler)
Date: 30 Jan 2007 15:44:30 GMT
Subject: thread and processes with python/GTK
References: <1170151634.019690.320310@k78g2000cwa.googlegroups.com>
Message-ID: <5297euF1ndifjU1@mid.individual.net>

Hi,

how do you start the python app? Goes stdout
to a terminal or a pipe?

"python script.py"
and "python script.py | cat" behave different.

Maybe "sys.stdout.flush()" helps you.

BTW, I switched from threads to idle_add for pygtk
applications.

awalter1 wrote:
> Hello,
>
> I'm developping an application with python, pyGTK and GTK+.
> I've performed many tests by using methods as Popen, popen2, 
> os.system ... to communicate with Unix (HPUX),
> The last attempt is this code written in a thread :
> 	    fin,fout = popen2.popen2('ps -def')
> 	    line = fin.readline()
> 	    while 1 :
> 	    	if not line : break
> 	    	print "line=",line
> 	   	line = fin.readline()
> 	    fin.close()
> In that case, lines are printed only when I exit my application.
> Usually the behavior is not as expected and I cannot understand why. I 
> am wondering that it could be a constraint from the use of GTK 
> (mainloop() existence ???).
> Is somebody aware about conflict between GTK use and unix mechanism.
>
> Thanks for you help

-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From m.elston at advantest-ard.com  Fri Jan  5 16:05:02 2007
From: m.elston at advantest-ard.com (Mark Elston)
Date: Fri, 05 Jan 2007 13:05:02 -0800
Subject: strange for loop construct
In-Reply-To: <mailman.2347.1168030198.32031.python-list@python.org>
References: <1168029548.217679.251230@q40g2000cwq.googlegroups.com>
	<mailman.2347.1168030198.32031.python-list@python.org>
Message-ID: <12ptf5bl21f2teb@corp.supernews.com>

* Gabriel Genellina wrote (on 1/5/2007 12:49 PM):
> At Friday 5/1/2007 17:39, Sardaukary at gmail.com wrote:
> 
>> wordfreq = [wordlist.count(p) for p in wordlist]
>>
>> I would expect
>>
>> for p in wordlist:
>>     wordfreq.append(wordlist.count(p))
>>
>>
>> I didn't know you could have an expression in the same line.
> 
> That's known as a "list comprehension" and is roughly equivalent to your 
> code. Section 5 of the tutorial covers them. 
> http://docs.python.org/tut/node7.html
> 
> 

If you have a Python installation you should be able to find the
"Whats New" section of the docs.  List comprehensions are described
pretty well in the "What's new in Python 2.0?" section.  This gives
some simple examples as well as the rationale behind them.

Mark


From gagsl-py at yahoo.com.ar  Thu Jan 25 02:00:36 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 25 Jan 2007 04:00:36 -0300
Subject: Python does not play well with others
In-Reply-To: <egYth.15027$w91.6162@newsread1.news.pas.earthlink.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<xqxirex3psq.fsf@cola3.ca.boeing.com>
	<mailman.3110.1169668391.32031.python-list@python.org>
	<egYth.15027$w91.6162@newsread1.news.pas.earthlink.net>
Message-ID: <7.0.1.0.0.20070125035706.044d1b50@yahoo.com.ar>

At Thursday 25/1/2007 03:39, Dennis Lee Bieber wrote:

>On Wed, 24 Jan 2007 19:04:39 +0100, egbert <egbert.bouwman at hccnet.nl>
>declaimed the following in comp.lang.python:
>
> > On Wed, Jan 24, 2007 at 06:24:37AM +0000, Harry George wrote:
> > >
> > > Perl - excellent modules and bindings for just about everything ...
> > > Java - a world of its own.  They reinvent the wheel instead of ...
> > > PHP - are we talking web scripts or serious programs?  Are you ...
> > > C - the portable assembler.  Solid, trusted, tunable ...
> > > C++ - objects tacked onto C; but that didn't work so invent ...
> > > Python - it just works.  Same scripts run on every platform ...
> >
> > What about C# ?
>
>         Uhm... Unless something has happened that I don't know about, isn't
>C# a M$ specific product?

Not exactly. It's defined by an ISO standard; there are several 
implementations apart from MS, like Borland C# Builder and the Mono project.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From tomas at fancy.org  Wed Jan  3 03:08:58 2007
From: tomas at fancy.org (Tom Plunket)
Date: Wed, 03 Jan 2007 00:08:58 -0800
Subject: list/dictionary as case statement ?
References: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
	<mailman.2232.1167806595.32031.python-list@python.org>
Message-ID: <71pmp2tq1klma5urhkfiv8bpq6u8sgtj06@4ax.com>

Hendrik van Rooyen wrote:

> It works well - and it is surprisingly fast too...
> And its easy if the opcodes are all say one byte,
> else you need an opcode length field too, and fancier
> parsing.

Often (always?) RISC architectures' instruction+operand lengths are
fixed to the word size of the machine.  E.g. the MIPS 3000 and 4000 were
32 bits for every instruction, and PC was always a multiple of four.
...which means the parsing is pretty straight forward, but as you say,
simulating the rest of the machine is the hard part.


-tom!

-- 


From S.Mientki-nospam at mailbox.kun.nl  Sun Jan 28 14:44:51 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sun, 28 Jan 2007 20:44:51 +0100
Subject: howto redirect and extend help content ?
In-Reply-To: <epinkk$m0h$1@ulysses.news.tiscali.de>
References: <1fc1a$45bcc7f4$d443bb3a$8806@news.speedlinq.nl>
	<epinkk$m0h$1@ulysses.news.tiscali.de>
Message-ID: <ccbb5$45bcfd1d$d443bb3a$12614@news.speedlinq.nl>

>> I'm making special versions of existing functions,
>> and now I want the help-text of the newly created function to exists of
<snip>
> 
> Don't you think your users can follow this easy reference theirselves?
My public consist of physicians with some knowledge of MatLab.
I'm trying to give them a system (based on Python) for which no knowledge of Python is needed.
When they put the cursor on the name of a function (in some pre-processing language, preferably 
something like LabView), the help text will be shown automatically in a separate window,
without typing any commands.

cheers,
Stef Mientki


From nagle at animats.com  Thu Jan 18 02:41:59 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 18 Jan 2007 07:41:59 GMT
Subject: More M2Crypto issues
Message-ID: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>

   I've been running M2Crypto successfully using Python 2.4 on Windows 2000,
and now I'm trying to get it to work on Python 2.3.4 on Linux.

   Attempting to initialize a context results in

Traceback (most recent call last):
   File "/www/htdocs/sitetruth.com/cgi/ratingdetails.cgi", line 46, in ?
     DetailsPageBuilder.detailspage(kdbfile,ktemplatefile,url)	# check and 
display domain or URL as web page
   File "./sitetruth/DetailsPageBuilder.py", line 70, in detailspage
     sitecert = InfoSSL2.Certificate(siteinfo, kverifylocations, verbose)
   File "./sitetruth/InfoSSL2.py", line 147, in __init__
     self.ctx = createsslcontext(trustedcafile, verbose)	# Generate general SSL 
context
   File "./sitetruth/InfoSSL2.py", line 40, in createsslcontext
     ctx = SSL.Context('sslv3')							# Create context with SSL params
   File "/home/sitetruth/lib/python/M2Crypto/SSL/Context.py", line 43, in __init__
     map()[long(self.ctx)] = self
ValueError: invalid literal for long(): _480e1008_p_SSL_CTX

    which, when I look at the code and try some test cases, seems
legitimate.  The cacheing code is trying to convert a reference to an
object (a C object, in fact) into a "long".  Python 2.4 on Windows
will do that.  Python 2.3.4 on Linux converts it to a string first,
gets "_480e1008_p_SSL_CTX", and then tries to convert that to an
integer, which fails.

    M2Crypto is supposed to work with Python 2.3, so this should work.

				John Nagle


From sjmachin at lexicon.net  Sat Jan 27 01:04:06 2007
From: sjmachin at lexicon.net (John Machin)
Date: 26 Jan 2007 22:04:06 -0800
Subject: strip question
In-Reply-To: <1169876027.003477.161350@a75g2000cwd.googlegroups.com>
References: <1169876027.003477.161350@a75g2000cwd.googlegroups.com>
Message-ID: <1169877846.370135.181110@q2g2000cwa.googlegroups.com>



On Jan 27, 4:33 pm, eight02645... at yahoo.com wrote:
> hi
> can someone explain strip() for these :
> [code]>>> x='www.example.com'
> >>> x.strip('cmowz.')'example'
> [/code]

According to the documentation (with emphasis added):

"""Return a copy of the string with the *leading* and *trailing*
characters removed."""

Looking at the leading edge: "w" is in the set to strip, so it is
removed. Same applies to another 2 "w"s and a dot. "e" is not in the
strip set so it stops.
At the trailing edge: "m", "o", "c" and dot are removed, then it stops
because there's another "e".

> when i did this:
> [code]>>> x = 'abcd,words.words'
> >>> x.strip(',.')'abcd,words.words'
> [/code]
>
> it does not strip off "," and "." .Why is this so?

The comma and dot in your example are neither leading nor trailing.
The leading "a" is not in the set to strip, so nothing happens at the
front door.
The trailing "s" is not in the set to strip, so there's no back door
action either.

HTH,
John



From nmm1 at cus.cam.ac.uk  Mon Jan  8 12:59:26 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 8 Jan 2007 17:59:26 GMT
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk><entj5d$o4$1@south.jnrs.ja.net>
	<entkru$2vs$1@gemini.csx.cam.ac.uk>
	<50f5snF1fb5uqU2@mid.individual.net>
	<entpo0$d0g$1@gemini.csx.cam.ac.uk>
	<mailman.2425.1168272626.32031.python-list@python.org>
	<enttq6$lj2$1@gemini.csx.cam.ac.uk>
	<1168277798.302236.184180@s34g2000cwa.googlegroups.com>
Message-ID: <enu0pu$rj0$1@gemini.csx.cam.ac.uk>


In article <1168277798.302236.184180 at s34g2000cwa.googlegroups.com>,
"Ziga Seilnacht" <ziga.seilnacht at gmail.com> writes:
|> 
|> > I think that you should.  Where does it say that tuple's __str__ is
|> > the same as its __repr__?
|> >
|> > The obvious interpretation of the documentation is that a sequence
|> > type's __str__ would call __str__ on each sub-object, and its __repr__
|> > would call __repr__.
|> 
|> How would you distinguish ['3', '2', '1'] from [3, 2, 1] in that case?

Well, it's not felt necessary to distinguish those at top level, so
why should it be when they are in a sequence?

print "3", 3
3 3

But this whole thing is getting ridiculous.  The current implementation
is a bizarre interpretation of the specification, but clearly not an
incorrect one.  It isn't important enough to get involved in a religious
war over - I was merely puzzled as to the odd behaviour, because I have
to teach it, and it is the sort of thing that can confuse naive users.


Regards,
Nick Maclaren.


From bearophileHUGS at lycos.com  Wed Jan  3 15:10:55 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 3 Jan 2007 12:10:55 -0800
Subject: Sorting on multiple values, some ascending, some descending
In-Reply-To: <1167852652.416990.158610@k21g2000cwa.googlegroups.com>
References: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
	<1167852652.416990.158610@k21g2000cwa.googlegroups.com>
Message-ID: <1167855055.615746.105410@48g2000cwx.googlegroups.com>

Raymond Hettinger:
> The simplest way is to take advantage of sort-stability and do
> successive sorts.  For example, to sort by a primary key ascending and
> a secondary key decending:
>    L.sort(key=lambda r: r.secondary, reverse=True)
>    L.sort(key=lambda r: r.primary)

That's probably the faster and simpler way.
The following solution is probably slow, memory-hungry, and it's not
tested much so it may be buggy too, but it shows my idea, and bugs can
be fixed:

class Inverter:
    def __init__(self, item, reversed=False):
            self.item = item
            self.reversed = reversed
    def __cmp__(self, other):
        if self.reversed:
            return cmp(other.item, self.item)
        else:
            return cmp(self.item, other.item)

data = [[1, "a", "b"], [1, "b", "d"], [1, "d", "a"]]
reverses = [True, False, False]

print sorted(data, key=lambda subseq: map(Inverter, subseq, reverses))

Bye,
bearophile



From grante at visi.com  Thu Jan  4 23:17:38 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 05 Jan 2007 04:17:38 -0000
Subject: What is proper way to require a method to be overridden?
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<7.0.1.0.0.20070105004837.05b36d98@yahoo.com.ar>
	<mailman.2308.1167969320.32031.python-list@python.org>
Message-ID: <12prkb29em82cac@corp.supernews.com>

On 2007-01-05, Thomas Ploch <Thomas.Ploch at gmx.net> wrote:

>>> I am writing a class that is intended to be subclassed.  What
>>> is the proper way to indicate that a sub class must override a
>>> method?
>> 
>> If any subclass *must* override a method, raise
>> NotImplementedError in the base class (apart from documenting
>> how your class is supposed to be used).
>
> I learn so much from this list. I didn't even know this error existed.

And remember: even if it didn't, you could have created your
own:

------------------------------foo.py------------------------------
class NotImplementedError(Exception):
    pass

def foo():
    print "hi there"
    msg = "there's a penguin on the telly!"
    raise NotImplementedError(msg)
    print "how are you?"
    
foo()
------------------------------------------------------------------

$ python foo.py
hi there
Traceback (most recent call last):
  File "foo.py", line 10, in ?
    foo()
  File "foo.py", line 7, in foo
    raise NotImplementedError(msg)
__main__.NotImplementedError: there's a penguin on the telly!


A few carefully thought-out exceptions can often eliminate the
need for a lot of messy code.

-- 
Grant Edwards                   grante             Yow!  I'll show you MY
                                  at               telex number if you show
                               visi.com            me YOURS...


From zaz600 at gmail.com  Mon Jan 29 17:07:26 2007
From: zaz600 at gmail.com (NoName)
Date: 29 Jan 2007 14:07:26 -0800
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <1170090408.495646.85720@v33g2000cwv.googlegroups.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<epl3la$10g0$1@ulysses.news.tiscali.de>
	<1170088693.768440.26580@h3g2000cwc.googlegroups.com>
	<1170090408.495646.85720@v33g2000cwv.googlegroups.com>
Message-ID: <1170108446.671609.169400@j27g2000cwj.googlegroups.com>

WOW! :shock:

in this case:

while 1:i=__import__;print 
i('binascii').b2a_base64(i('os').urandom(6)),;raw_input()


On 30 ???., 04:06, "Szabolcs Nagy" <nszabo... at gmail.com> wrote:
> > while
> > 1:i=__import__;print''.join(i('random').choice(i('string').letters
> > +'1234567890')for x in range(8)),;raw_input()while
> 1:i=__import__;r='random';print''.join(i(r).choice(i('string').letters
> +'1234567890')for x in`r`),;raw_input()
>
> even shorter:
> range -> `'random'`
>
> :)



From kylotan at gmail.com  Fri Jan 12 05:01:00 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 12 Jan 2007 02:01:00 -0800
Subject: pygame and python 2.5
In-Reply-To: <eo7jji$61nu$1@zam602.zam.kfa-juelich.de>
References: <eo7jji$61nu$1@zam602.zam.kfa-juelich.de>
Message-ID: <1168596060.101670.66250@a75g2000cwd.googlegroups.com>

siggi wrote:

> when I rtry to install pygame (pygame-1.7.1release.win32-py2.4.exe, the most
> ciurrent version I found) it requires Python 2.4! Will I really have to
> uninstall my Python 2.5  and install the old Python 2.4 in order to use
> pygame?

For now, yes. This is a long-standing problem with Python really,
requiring extensions to always be recompiled for newer versions. I
usually have to wait about 6 months to a year after any new release
before I can actually install it, due to the extension lag.

-- 
Ben Sizer



From fumanchu at amor.org  Thu Jan 25 20:32:00 2007
From: fumanchu at amor.org (fumanchu)
Date: 25 Jan 2007 17:32:00 -0800
Subject: ANN: Dejavu 1.5.0RC1
In-Reply-To: <1169748635.912754.191720@j27g2000cwj.googlegroups.com>
References: <mailman.3122.1169680178.32031.python-list@python.org>
	<1169748635.912754.191720@j27g2000cwj.googlegroups.com>
Message-ID: <1169775119.966414.141350@l53g2000cwa.googlegroups.com>

On Jan 25, 10:10 am, "olive" <ocolli... at gmail.com> wrote:
> Do you consider a StorageManagers for Oracle ?

Yes, and in fact, I already have a ticket for it:
http://projects.amor.org/dejavu/ticket/59. I've downloaded Oracle 10.2g
XE and played with it a little, but hit some snags right away due to
its different interface. I think now that I've done a Firebird backend,
I'll be a little better able to tackle an Oracle adapter. But I don't
use Oracle every day, so any help is most welcome.


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org



From aahz at pythoncraft.com  Wed Jan 17 00:16:52 2007
From: aahz at pythoncraft.com (Aahz)
Date: 16 Jan 2007 21:16:52 -0800
Subject: Learning Python book, new edition?
References: <mailman.2580.1168528978.32031.python-list@python.org>
	<1168547177.121582.320840@k58g2000hse.googlegroups.com>
	<1168831013.218729.243020@l53g2000cwa.googlegroups.com>
Message-ID: <eokbg4$25i$1@panix3.panix.com>

In article <1168831013.218729.243020 at l53g2000cwa.googlegroups.com>,
wesley chun <wescpy at gmail.com> wrote:
>
>more on topic, here's a summary of Python books which are rev'd up to
>2.5, categorized but not in any particular order:
>
>Python learning:
>- Python for Dummies, Maruch, Sep 2006

That should be "Maruch & Maruch" -- my primary partner (Stef) did most of
the writing, but I supplied most of the Python knowledge.  It was really
a joint effort, and I heartily recommend writing a book to anyone who
wants to test their marriage.  ;-)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Plus ca change, plus c'est la meme chose."


From webraviteja at gmail.com  Sat Jan 20 01:59:19 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 19 Jan 2007 22:59:19 -0800
Subject: confused on python rpc with apache, is it possible?
In-Reply-To: <mailman.2931.1169273350.32031.python-list@python.org>
References: <mailman.2912.1169227938.32031.python-list@python.org>
	<51ce8uF1k0tl5U1@mid.uni-berlin.de>
	<mailman.2931.1169273350.32031.python-list@python.org>
Message-ID: <1169276359.477277.17930@q2g2000cwa.googlegroups.com>


krishnakant Mane wrote:
> On 19/01/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
> >
> > I'm unclear why you want the apache in there in the first place. Why don't
> > you just create an e.g. twisted-based XMLRPC-server, and simply let that
> > run? What is the apache intended for?
>
>
> twisted-based? what is that?  what is that.
> I am very new to xml-rpc so my questions may sound very basic.

All you have to do is Google when you have very basic questions
For example: twisted python xmlrpc

> any ways apache is doing nothing in there but I thought that if some
> thing needs to be done in php in the future then apache better be
> there but as I said that is no need if pythone can do it on a stand
> alone basis.

Use mod_python with some xmlrpc handler. There is more than one around.
Google for them. That way you can keep Apache for both Python and PHP.

Ravi Teja.



From mohan.us2010 at gmail.com  Tue Jan  9 08:10:24 2007
From: mohan.us2010 at gmail.com (mohan)
Date: 9 Jan 2007 05:10:24 -0800
Subject: Using with CSV library in Python 2.2!!!
Message-ID: <1168348224.843657.27330@42g2000cwt.googlegroups.com>

Hi Guys,

I'm back one more basic question, this time on using CSV (Comma
Seperated Value) library with Python 2.2. At my workplace I have Python
2.2 installed and am using PythonWin 2.2.1 IDE from Mark Hammond.

I want to use the CSV library module for reading data from the .csv
files and when I try to import the module, I get the error "CSV module
is not found". The reason, CSV module is missing from the Python root
directories. Now my first question is,

1. Does Python 2.2 come with CSV library module or not? If yes, have I
lost it somewhere??

2. If Python 2.2 does not come with CSV module, is it possible to add
the CSV module to the Python root and start working??

3. If yes, where do I get this module from??

Would be glad to have an answer for these questions. Thanks in advance.

Cheers,
Mohan.



From anand at soe.ucsc.edu  Tue Jan 30 13:55:09 2007
From: anand at soe.ucsc.edu (Anand Patil)
Date: Tue, 30 Jan 2007 10:55:09 -0800
Subject: C extension module causes bus error on Python exit
In-Reply-To: <1170175431.34.2844@mint-julep.mondoinfo.com>
References: <45BE9B6D.5060407@cse.ucsc.edu>
	<1170175431.34.2844@mint-julep.mondoinfo.com>
Message-ID: <45BF948D.7040702@cse.ucsc.edu>

Hi all,

I was referred to this list from python-help. I've written an extension 
module in C which contains several new types. The types can be 
instantiated, used, and deleted under Python 2.4.3  on OS X 10.4 without 
problems.

However, whenever I import the module Python tries to dereference a NULL 
pointer and crashes *at exit*, whether or not I've instantiated any of 
the types. I've searched for memory leaks with gc.get_objects and Mac 
OS's MallocDebug utility, but haven't found any evidence.

Has anyone run into a problem like this? Any help is greatly appreciated.

Thank you,
Anand Patil


From imageguy1206 at gmail.com  Tue Jan 23 15:06:35 2007
From: imageguy1206 at gmail.com (imageguy)
Date: 23 Jan 2007 12:06:35 -0800
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <45b6231b$1_2@news.bluewin.ch>
References: <45b6231b$1_2@news.bluewin.ch>
Message-ID: <1169582795.882496.209750@a75g2000cwd.googlegroups.com>

> I am trying to use UI Automation to drive an MS Windows app (with pywinauto).
>
> I need to scrape the app's window contents and use some form of OCR to get at
> the texts (pywinauto can't get at them).
>
> As an alternative to integrating an OCR engine, and since I know the fonts and
> sizes used to write on the app's windows, I reasoned that I could base a simple
> text recognition module on the capability to drive MSWindows text rendering - eg
> to generate pixmaps of texts I expect to find in the driven app's windows, exact
> to the pixel.
>
> The advantage of that approach would be exactitude and self-containment.
>
> I've verified manually inside an Idle window, that indeed I could produce
> pixmaps of expected app texts, exact to the pixel (with Tkinter+screen capture
> at least).
>
> I could use help to turn this into a programmable capability, ie : A simple -
> with Tkinter or otherwise - way to wrap access to the MS Windows UI text
> rendering engine, as a function that would return a picture of rendered text,
> given a string, a font, a size and colors ?
>
> And ideally, without interfering with screen contents ?
>
> Thanks in advance for any guidance,
>
> Boris Borcic

I was looking for ( and still am searching for) similiar functionality.
 Specifically I would like to be able to capture a small area of the
screen (a number or a code) and convert this to text that can be used
in my application.

When I asked my question, I was directed to the Microsoft Accessibility
tool kit.
Serach on this list for the post titled;
"Reading text labels from a Win32 window"

I work with wxPython and Win32 applications exclusively.

So if I can be of any help or assistance, please let me know.

Geoff.



From steve at REMOVE.THIS.cybersource.com.au  Sun Jan  7 17:10:38 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 08 Jan 2007 09:10:38 +1100
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.01.07.22.10.37.701405@REMOVE.THIS.cybersource.com.au>

On Sun, 07 Jan 2007 04:09:13 -0800, Paul Rubin wrote:

> "Felipe Almeida Lessa" <felipe.lessa at gmail.com> writes:
>> What is the chance of having to inherit from two classes from
>> different modules but with exactly the same name *and* the same
>> instance variable name?
>> 
>> Of course you're being very pessimistic or extremely unlucky.
> 
> If you want to write bug-free code, pessimism is the name of the game.

I wonder whether Paul uses snow chains all year round, even in the blazing
summer? After all, "if you want to drive safely, pessimism is the name of
the game".

In the last couple of weeks comp.lang.python has had (at least) two
practical examples of the pros and cons of private attributes.

The pro: there was discussion about replacing the optparse module's
implementation with argparse, leaving the interface the same. This was
complicated by the fact that optparse exposes its internal variables,
making the job of duplicating the interface significantly harder. However
this was surely a design choice, not an accident. Having private
attributes won't save you if you choose not to make your attributes
private.

The con: there was a fellow who (for some reason) actually needed to
access a class' private attributes. To the best of my knowledge, he was
over 18 and, while new to Python, an experienced programmer, so I believe
him when he said he had eliminated all other alternatives. (And if he
were wrong, if he was incompetent -- Not My Problem. It isn't for me to
take a hammer off him so he doesn't hit his thumb with it.) In his case,
Python's name mangling of private attributes was an inconvenience, not a
help.

Compared to all the "what-ifs" and "maybes" and hypotheticals in this
thread, there were two practical cases that revolved around private
variables. In one, we see that they aren't a panacea: data hiding doesn't
help when the data isn't hidden. In the other, we see that one developer's
private attribute is just what another developer needs to solve a problem.


-- 
Steven.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan 15 13:44:17 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 15 Jan 2007 19:44:17 +0100
Subject: compile your python programs with rpython
References: <1168886140.256596.101250@v45g2000cwv.googlegroups.com>
Message-ID: <5120c1F1hccevU1@mid.individual.net>

Simon Burton wrote:

> The pypy'ers have written a brief description on
> using rpython to create standalone executables:
> 
> http://codespeak.net/pypy/dist/pypy/doc/standalone-howto.html
> 
> This is definately worth playing around with, it's very nice
> writing (r)python code that gets executed as if it were c code.

Needless to say, RPython code has some restrictions over normal
Python code.

Regards,


Bj?rn

-- 
BOFH excuse #317:

Internet exceeded Luser level, please wait until a luser logs off
before attempting to log back on.



From johnzenger at gmail.com  Fri Jan 19 13:43:53 2007
From: johnzenger at gmail.com (John Zenger)
Date: 19 Jan 2007 10:43:53 -0800
Subject: when format strings attack
In-Reply-To: <mailman.2908.1169221530.32031.python-list@python.org>
References: <1169207467.989977.162940@q2g2000cwa.googlegroups.com>
	<mailman.2908.1169221530.32031.python-list@python.org>
Message-ID: <1169232233.469572.298320@a75g2000cwd.googlegroups.com>

Perhaps it is not as severe a security risk, but pure Python programs
can run into similar problems if they don't check user input for %
codes.  Example:

>>> k = raw_input("Try to trick me: ")
Try to trick me: How about %s this?
>>> j = "User %s just entered: " + k
>>> print j % "John"
Traceback (most recent call last):
  File "<pyshell#8>", line 1, in ?
    print j % "John"
TypeError: not enough arguments for format string



On Jan 19, 10:44 am, "Gabriel Genellina" <gagsl... at yahoo.com.ar> wrote:
> <Eric_Dex... at msn.com> escribi? en el mensajenews:1169207467.989977.162940 at q2g2000cwa.googlegroups.com...
>
> >http://www.ddj.com/184405774;jsessionid=BDDEMUGJOPXUMQSNDLQCKHSCJUNN2JVN
>
> > I saw a warning from homeland security about this.  I only comment on
> > the because I am trying to use os.system('command1 arg') and it doesn't
> > work but I do see examples with % that is borrowed from the c language.
> > Seems like if I can write a batch file that does something the same
> > behavior should happen in the os module..Pure Python programs are not affected, but a review of the C implementation
> should be made to see if any (variant of) printf is used without a proper
> format. Anyway I doubt you could find something, because the vulnerability
> is so well known for ages.
> 
> --
> Gabriel Genellina



From evan at binarymanipulations.com  Tue Jan  2 05:50:18 2007
From: evan at binarymanipulations.com (Evan Carmi)
Date: Tue, 2 Jan 2007 10:50:18 +0000 (UTC)
Subject: Unexpected output while walking dirs
References: <mailman.2079.1167298209.32031.python-list@python.org>
	<1167314477.668406.324830@a3g2000cwd.googlegroups.com>
Message-ID: <loom.20070102T114806-352@post.gmane.org>

wittempj <at> hotmail.com <martin.witte <at> gmail.com> writes:

> 
> If I do get this correct - you have files like \test\Mail\somename.msf
> and \test\Mail\somedirectory\someothername.msf, these files you want to
> move to \test\backup\timestamp\somename.msf and
> \test\backup\timestamp\somedirectory\someothername.msf.
> 
> In your code you start with collecting allfiles, and then you remove
> all except *,msf files. You can do this in one step to, by collecting
> only the wanted files in a listby applying the glob command from module
> glob :
> 
> allfiles = []
> for root, dirs, files in os.walk(top, topdown=False):
>     targetfiles = glob.glob(os.path.join(root,'*.msf'))
>     allfiles += targetfiles
> 
> Now allfiles contains the list of .msf files down from directory
> specified in variable top. From here I would create a list of 2-tuples,
> with as first element the full original filename, and as second element
> the desired backupname. Note that in your code you call the clock in a
> for loop, this might result in more directories.
> 
> backuproot = os.path.join(os.path.dirname(top), 'backup-msf',
> time.strftime('%Y%m%d%H%M%S'))
> backupfilenames = []
> for f in allfiles:
>     backupfilenames.append((f, os.path.join(backuproot,
> os.path.basename(f))))
> 
> >From here it is easy to do the move.
> 
Thanks so much for your help, you got me started and I finished it with some
help from others as well. For anyone interested the working code is:

--
#!/usr/bin/python
#Author: Evan Carmi
#Date: 20060102
#Purpose: To uncorrupt Mozilla Thunderbird mail index files.
#Version: 1.00
import os, time, glob
 
srcRoot = 'f:\\test\\mail'
backupRoot = os.path.join(os.path.dirname(srcRoot), 'backup-msf',
time.strftime('%Y%m%d%H%M%S'))
 
for root, dirs, files in os.walk(srcRoot, topdown=False):
    sources = glob.glob(os.path.join(root,'*.msf'))
    pairs = []
 
    for source in sources:
        # If srcRoot is /foo/bar and source is /foo/bar/baz, let relativeSource
equal /baz
        #let relativeSource be equal to the remainder of source when you take
away len(srcRoot)
        idx = len(srcRoot)
        relativeSource = source[idx:]
 
        # Then let destination equal /quux/baz if backupRoot is /quux
        destination = backupRoot + relativeSource
        # relativeSource begins with a path separator, so os.path.join will
misinterpret it.
 
        pair = (source, destination)
        pairs.append(pair)
 
    for pair in pairs:
        os.renames(*pair)
        # This is functionally equivalent to os.renames(pair[0], pair[1])

--

Thanks, Evan



From ptwobrussell at gmail.com  Sun Jan 14 12:05:46 2007
From: ptwobrussell at gmail.com (MR)
Date: 14 Jan 2007 09:05:46 -0800
Subject: Decorators inside of class and decorator parameters
In-Reply-To: <mailman.2703.1168747644.32031.python-list@python.org>
References: <1168728983.541526.202320@l53g2000cwa.googlegroups.com>
	<mailman.2703.1168747644.32031.python-list@python.org>
Message-ID: <1168794346.511854.315470@s34g2000cwa.googlegroups.com>

Thanks so much for your reply.  You've definitely helped me a great
deal on this. Your comment about the difference between define time and
instantiation time cleared things up more than anything, and that also
helped clear up the confusion I was having about "self".

I think the places I've seen decorators called like fooDecorator() must
be using some default arguments in the function signature...so that
part makes a lot more sense now too.

Thanks again!


Gabriel Genellina wrote:
> "MR" <ptwobrussell at gmail.com> escribi? en el mensaje
> news:1168728983.541526.202320 at l53g2000cwa.googlegroups.com...
>
> > I have a question about decorators, and I think an illustration would
> > be helpful. Consider the following simple class:
> >
> > #begin code
> > class Foo:
> >    def fooDecorator(f):
> >        print "fooDecorator"
> >
> >        def _f(self, *args, **kw):
> >            return f(self, *args, **kw)
> >
> >        return _f
> >
> >    @fooDecorator
> >    def fooMethod(self):
> >        print "fooMethod"
> >
> > f = Foo()
> > f.fooMethod()
> > #end of code
> >
> > This code runs, and actually serves my purpose. However, I'm a little
> > confused about three things and wanted to try and work through them
> > while I had the time to do so. I believe all of my confusion is related
> > to the parameters related to the fooDecorator:
>
> [I reordered your questions to make the answer a bit more clear]
>
> > -why does this code even work, because the first argument to
> > fooDecorator isn't self
>
> fooDecorator is called when the class is *defined*, not when it's
> instantiated. `self` has no meaning inside it, neither the class to which it
> belongs (Foo does not even exist yet).
> At this time, fooDecorator is just a simple function, being collected inside
> a namespace in order to construct the Foo class at the end. So, you get
> *exactly* the same effect if you move fooDecorator outside the class.
>
> > -how I would pass arguments into the fooDecorator if I wanted to (my
> > various attempts have failed)
>
> Once you move fooDecorator outside the class, and forget about `self` and
> such irrelevant stuff, it's just a decorator with arguments.
> If you want to use something like this:
>    @fooDecorator(3)
>    def fooMethod(self):
> that is translated to:
>    fooMethod = fooDecorator(3)(fooMethod)
> That is, fooDecorator will be called with one argument, and the result must
> be a normal decorator - a function accepting a function an an argument and
> returning another function.
>
> def outerDecorator(param):
>   def fooDecorator(f):
>     print "fooDecorator"
>
>     def _f(self, *args, **kw):
>         print "decorated self=%s args=%s kw=%s param=%s" % (self, args, kw,
> param)
>         kw['newparam']=param
>         return f(self, *args, **kw)
>
>     return _f
>   return fooDecorator
>
> This is the most direct way of doing this without any help from other
> modules - see this article by M. Simoniato
> http://www.phyast.pitt.edu/~micheles/python/documentation.html for a better
> way using its decorator factory.
>
> > -what the difference is between decorating with @fooDecorator versus
> > @fooDecorator()
> Easy: the second way doesn't work :)
> (I hope reading the previous item you can answer this yourself)
>
> > I'm searched the net and read the PEPs that seemed relevant, but I
> > didn't see much about decorators inside of a class like this. Can
> > anyone comment on any of these three things?
> As said in the beginning, there is no use for decorators as methods (perhaps
> someone can find a use case?)
> If you move the example above inside the class, you get exactly the same
> results.
> 
> HTH,
> 
> -- 
> Gabriel Genellina



From joshua at eeinternet.com  Tue Jan 23 19:45:00 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Tue, 23 Jan 2007 15:45:00 -0900
Subject: My python programs need a GUI, wxPython or PyQt4?
References: <ep60jp$63v$1@aioe.org> <ep64ic$epi$1@aioe.org>
Message-ID: <45b69f63$0$24463$88260bb3@free.teranews.com>

Daniel wrote:

> I've downloaded both the wxPython and the PyQt4 package, and by the
> first impression I must say that the PyQt4 system had a very
> compelling presentation. From what I can understand from the feedback
> I've gotten so far is that the wxPython is a better choice when it
> comes to compability (with linux), and it's free even if I want to
> create applications and sell them.
> So, from what I understand I will have to go with PyQt4 since (from
> my understanding):
> 1. I will not sell the applications I'm working with since they will
> only be used by the internal QA at a computer game company.

Even that is getting on shaky ground, at least according to Troll Tech. 
See: http://www.trolltech.com/developer/knowledgebase/190/  So, write it
for internal use, and put up for distribution on your personal web site
(pending company approval, of course).

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From cvanarsdall at mvista.com  Mon Jan 29 16:18:30 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Mon, 29 Jan 2007 13:18:30 -0800
Subject: The reliability of python threads
In-Reply-To: <014501c741fa$64dbbbe0$03000080@hendrik>
References: <mailman.3092.1169657938.32031.python-list@python.org><ep8gue$3tu$1@panix3.panix.com>	<45B90118.5010408@mvista.com><01b001c7411d$17e52a20$03000080@hendrik>
	<45BA39D3.7020400@mvista.com>
	<014501c741fa$64dbbbe0$03000080@hendrik>
Message-ID: <45BE64A6.7010809@mvista.com>

Hendrik van Rooyen wrote:
> [snip]
>> could definitely do more of them.  The thing will be 
>>     
>
> When I read this - I thought - probably your stuff is working 
> perfectly - on your test cases - you could try to send it some
> random data and to see what happens - seeing as you have a test 
> server, throw the kitchen sink at it.
>
> Possibly "random" here means something that "looks like" data
> but that is malformed in some way. Kind of try to "trick" the 
> system to get it to break reliably.
>
> I'm sorry I can't be more specific - it sounds so weak, and you
> probably already have test cases that "must fail" but I don't 
> know how to put it any better...
>   
Well, sometimes a weak analogy is the best thing because it allows me to 
fill in the blanks "How can I throw a kitchen sink at it in a way I 
never have before"

And away my mind goes, so thank you.

-carl

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From hg at nospam.org  Wed Jan  3 03:23:52 2007
From: hg at nospam.org (hg)
Date: Wed, 03 Jan 2007 09:23:52 +0100
Subject: array of class / code optimization
References: <mailman.2221.1167763760.32031.python-list@python.org>
	<AOPmh.83$9v1.124@nntpserver.swip.net>
Message-ID: <6UPmh.6785$hr3.92@newsfe24.lga>

mm wrote:

> 
> Yes, it was the (), equivalent to thiks like new() create new object
> from class xy.
>>   s1.append(Word)
> s1.append(Word())
> 
> But I was looking for a "struct" equivalent like in c/c++.
> And/or "union". I can't find it.
> 
> Maybe you know a source (URL) "Python for c/c++ programmers" or things
> like that.
> 
> 
> Yes, I konw whats an object is...


A struct in C is unrelated to a struct in C++ as a struct in C++ _is_ a
class.


hg



From aahz at pythoncraft.com  Wed Jan 24 15:52:30 2007
From: aahz at pythoncraft.com (Aahz)
Date: 24 Jan 2007 12:52:30 -0800
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
Message-ID: <ep8gue$3tu$1@panix3.panix.com>

In article <mailman.3092.1169657938.32031.python-list at python.org>,
Carl J. Van Arsdall <cvanarsdall at mvista.com> wrote:
>
>Hey everyone, I have a question about python threads.  Before anyone 
>goes further, this is not a debate about threads vs. processes, just a 
>question.
>
>With that, are python threads reliable?  Or rather, are they safe?  I've 
>had some strange errors in the past, I use threading.lock for my 
>critical sections, but I wonder if that is really good enough.
>
>Does anyone have any conclusive evidence that python threads/locks are 
>safe or unsafe?

My response is that you're asking the wrong questions here.  Our database
server locked up hard Sunday morning, and we still have no idea why (the
machine itself, not just the database app).  I think it's more important
to focus on whether you have done all that is reasonable to make your
application reliable -- and then put your efforts into making your app
recoverable.

I'm particularly making this comment in the context of your later point
about the bug showing up only every three or four months.

Side note: without knowing what error messages you're getting, there's
not much anybody can say about your programs or the reliability of
threads for your application.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From bearophileHUGS at lycos.com  Sun Jan  7 08:20:35 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 7 Jan 2007 05:20:35 -0800
Subject: Why less emphasis on private data?
In-Reply-To: <7x7ivz88af.fsf@ruckus.brouhaha.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
Message-ID: <1168176034.993117.127130@42g2000cwt.googlegroups.com>

Paul Rubin:
> Python certainly makes you spend more of your attention worrying
> about possible attribute name collisions between classes and their
> superclasses. And Python's name mangling scheme is leaky and
> bug-prone if you ever re-use class names.

> Trouble with this is you can have two classes with the same name,
> perhaps because they were defined in different modules, and then the
> name mangling fails to tell them apart.

Without changing Python syntax at all I think this situation may be
improved. Instead of Python applying name mangling to names with __
before them, it can manage them as private, a higher level kind of
management. And then if it's useful a new built-in function may be
invented to access such private attributes anyway. I think this may
solve your problem. (This is for Py3.0). Maybe a metaclass can be
invented to simulate such behavior to test and try it before modifying
the language itself.

Bye,
bearophile



From gagsl-py at yahoo.com.ar  Sat Jan 20 01:13:27 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 20 Jan 2007 03:13:27 -0300
Subject: regexp qns
References: <1169268024.164643.71320@l53g2000cwa.googlegroups.com>
Message-ID: <eosc9j$lfs$1@sea.gmane.org>


<eight02645999 at yahoo.com> escribi? en el mensaje 
news:1169268024.164643.71320 at l53g2000cwa.googlegroups.com...
> hi
> suppose i have a string like
>
> test1?test2t-test3*test4*test5$test6#test7*test8
>
> how can i construct the regexp to get test3*test4*test5 and
> test7*test8, ie, i want to match * and the words before and after?
> thanks

I suppose this is just an example and you mean "any word" instead of test1, 
test2, etc.
So your pattern would be: word*word*word*word, that is, word* repeated many 
times, followed by another word.
To match a word we'll use "\w+", to match an * we have to use "\*" (it's a 
special character)
So the regexp would be: "(\w+\*)+\w+"
Since we are not interested in the () as a group by itself -it was just to 
describe the repeating pattern- we change it into a non-grouping 
parenthesis.
Final version: "(?:\w+\*)+\w+"

import re
rexp = re.compile(r"(?:\w+\*)+\w+")
lines = [
 'test1?test2t-test3*test4*test5$test6#test7*test8',
 'test1?test2t-test3*test4$test6#test7_test8',
 'test1?nada-que-ver$esto.no.matchea',
 'test1?test2t-test3*test4*',
 'test1?test2t-test3*test4',
 'test1?test2t-test3*',
]

for line in lines:
  print line
  for txt in rexp.findall(line):
    print '->', txt

Test it with some corner cases and see if it does what you expect: no "*", 
starting with "*", ending with "*", embedded whitespace before and after the 
"*", whitespace inside a word, the very definition of "word"...

-- 
Gabriel Genellina 




From mccredie at gmail.com  Wed Jan  3 19:54:37 2007
From: mccredie at gmail.com (Matimus)
Date: 3 Jan 2007 16:54:37 -0800
Subject: code optimization (calc PI)
In-Reply-To: <UGXmh.194$9v1.250@nntpserver.swip.net>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
	<459BFDCB.4000503@sschwarzer.net>
	<UGXmh.194$9v1.250@nntpserver.swip.net>
Message-ID: <1167872076.937415.250340@11g2000cwr.googlegroups.com>

> If someone is really interested in speed optimization, I can publish my
> PI-calc code.

I wouldn't mind seeing it. Chances are you will get much better help if
you post your code anyway.

-Matt



From hg at nospam.org  Fri Jan  5 04:29:17 2007
From: hg at nospam.org (hg)
Date: Fri, 05 Jan 2007 10:29:17 +0100
Subject: importing / loading a module / class dynamically
Message-ID: <o1vnh.281$rv1.88@newsfe21.lga>

Hi,

I have the following problem.

I find in a directory hierarchy some files following a certain sets of
rules:

.../.../../plugin/name1/name1.py
....
.../.../../plugin/namen/namen.py

each file will in turn have a class with the same name as the filename
(minus .py)


I fetch those names in a list of string and want to import the files /
instantiate the classes.


I block at the beginning and tried this (test.py is a real file)
>>> s = 'test.py'
>>> eval ('import ' + s)

and get 

Traceback (most recent call last):
  File "<pyshell#1>", line 1, in -toplevel-
    eval ('import ' + s)
  File "<string>", line 1
    import test.py

Any clue ?

Thanks

hg



From mc at uga.edu  Tue Jan  9 16:30:01 2007
From: mc at uga.edu (mc)
Date: 9 Jan 2007 13:30:01 -0800
Subject: Python - C# interoperability
Message-ID: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>

Is there an easy way to compile a Python class (or set of classes) into
a .DLL that a C# program can call?  Or otherwise to use an existing
library of Python classes from a C# program as seamlessly as possible?



From jarausch at skynet.be  Tue Jan  2 12:16:28 2007
From: jarausch at skynet.be (Helmut Jarausch)
Date: Tue, 02 Jan 2007 18:16:28 +0100
Subject: python2.5 frameobject - how to upgrade?
In-Reply-To: <mailman.2204.1167749700.32031.python-list@python.org>
References: <459a6894$0$9322$ba620e4c@news.skynet.be>
	<mailman.2204.1167749700.32031.python-list@python.org>
Message-ID: <459A936C.4090609@skynet.be>

skip at pobox.com wrote:
>     Helmut> I'd like to install a package ('rekall') which uses
>     Helmut> frame->f_nlocals which is no longer contained in frameobject.h.
> 
>     Helmut> What's the recommended way to upgrade such an application?
> 
> I suspect PySequence_Length(frame->f_locals) will do the trick.

Yes, thanks, that fixed it,
Happy New Year to you.

A personal question: Have you converted from Perl to Python, as well?

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From theller at ctypes.org  Mon Jan  8 10:37:43 2007
From: theller at ctypes.org (Thomas Heller)
Date: Mon, 08 Jan 2007 16:37:43 +0100
Subject: help: code formatter?
In-Reply-To: <entknh$8onl$1@zam602.zam.kfa-juelich.de>
References: <entknh$8onl$1@zam602.zam.kfa-juelich.de>
Message-ID: <45A26547.9040606@ctypes.org>

siggi schrieb:
> Hi all,
> 
> as a newbie I have problems with formatting code of downloaded programs,
> because IDLE's reformatting capabilities are limited . Incorrect
> indentation, mixing of TAB with BLANKs or eol are often very nasty to
> correct.
> Is there a simple code formatter that first removes all indentations and
> then refomats correctly?
> 
> Please help!


Tools\scripts\reindent.py in your Python distribution.

Thomas


From bytter at gmail.com  Tue Jan 16 08:08:35 2007
From: bytter at gmail.com (Hugo Ferreira)
Date: Tue, 16 Jan 2007 13:08:35 +0000
Subject: re.sub and empty groups
Message-ID: <4e8efcf50701160508j24ceedf4l415df47063876319@mail.gmail.com>

Hi!

I'm trying to do a search-replace in places where some groups are
optional... Here's an example:

>> re.match(r"Image:([^\|]+)(?:\|(.*))?", "Image:ola").groups()
('ola', None)

>> re.match(r"Image:([^\|]+)(?:\|(.*))?", "Image:ola|").groups()
('ola', '')

>> re.match(r"Image:([^\|]+)(?:\|(.*))?", "Image:ola|ole").groups()
('ola', 'ole')

The second and third results are right, but not the first one, where
it should be equal to the second (i.e., it should be an empty string
instead of None). This is because I want to use re.sub() and when the
group is None, it blows up with a stack trace...

Maybe I'm not getting the essence of groups and non-grouping groups.
Someone care to explain (and, give the correct solution :)) ?

Thanks in advance,

Hugo Ferreira

-- 
GPG Fingerprint: B0D7 1249 447D F5BB 22C5  5B9B 078C 2615 504B 7B85


From nocl123 at gmail.com  Thu Jan 11 04:42:33 2007
From: nocl123 at gmail.com (nic)
Date: 11 Jan 2007 01:42:33 -0800
Subject: os.popen() not executing command on windows xp
Message-ID: <1168508553.151827.261420@k58g2000hse.googlegroups.com>

On my system (WinXP) typing the following line into command
prompt(cmd.exe) successfully scans the file test1.txt:
"c:\Program Files\Grisoft\AVG Free\avgscan.exe" "c:\program
files\temp1\test1.txt"

Yet the python script:
import os
a = os.popen('"c:\Program Files\Grisoft\AVG Free\avgscan.exe"
"c:\program files\temp1\test1.txt"')
print a.read()

Returns a blank line, and I doesn't scan the file. (Note I've used
os.popen() successfully on my system in other situations like:
os.popen('taskkill /F /IM taskname.exe')).

I have a feeling my avgscan example shown above not working has
something to do with calling a 3rd party software program (avgscan.exe)
through popen, but I don't know why this won't work, when manually
typing it in the command line does?



From nmm1 at cus.cam.ac.uk  Thu Jan 18 08:41:49 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 18 Jan 2007 13:41:49 GMT
Subject: what can be used in a signal handler
References: <3zKrh.30692$sE7.26486@newsfe21.lga>
Message-ID: <eontet$dbu$1@gemini.csx.cam.ac.uk>


In article <3zKrh.30692$sE7.26486 at newsfe21.lga>,
hg <hg at nospam.org> writes:
|> 
|> I posted an equivalent question earlier ... but am still not sure:
|> 
|> I currently (under Linux) have a program that uses Queue.put (raw_input(''))
|> in a signal handler and Queue.get() in the main/only thread.
|> 
|> It works but I want to know if it is legal / what type of synchro API I have
|> the right to use in a signal handler.

Strictly, no and none.

C and POSIX's specifications of signal handling is a complete mess.
ALL handling of ALL real signals is undefined behaviour, though few
programmers realise that and POSIX depends on it.  As that would make
all Unices (and Microsoft systems) unusable, you can reasonably assume
that there is some signal handling that will work.

But what?  Which is where you came in.

The situation is that most things that seem to work do actually work,
in some environments and under some circumstances.  You can never be
sure when they will stop working, however, and all bets are off when
you port signal handling code to a new system.  And, really but REALLY,
do not mix it with very high levels of optimisation or rely on it
being in any way thread safe.

I can't tell you whether the code of Queue is intended to work if an
active Queue.get is interrupted by a signal which then does a Queue.put,
but that is the sort of circumstance where things get very hairy.  Even
if Python has code to enable that case, it won't be 100% reliable on all
systems.

Sorry.  But that is the situation :-(


Regards,
Nick Maclaren.


From tjgolden at gmail.com  Tue Jan 16 12:09:34 2007
From: tjgolden at gmail.com (Tim Golden)
Date: 16 Jan 2007 09:09:34 -0800
Subject: Check a windows service
In-Reply-To: <1168966952.965088.17740@l53g2000cwa.googlegroups.com>
References: <1168966952.965088.17740@l53g2000cwa.googlegroups.com>
Message-ID: <1168967374.568967.173690@11g2000cwr.googlegroups.com>

awel wrote:

> I'm new in python and I would like to know if it's possible to check if
> a specific windows service is present and if it's possible how can I
> do?

This is one way:

http://tgolden.sc.sabren.com/python/wmi_cookbook.html#automatic_services

You'd have to change that example slightly, but I
hope the principal is clear enough. If not, ask again.

TJG



From pwatson at redlinepy.com  Fri Jan  5 23:36:24 2007
From: pwatson at redlinepy.com (Paul Watson)
Date: Fri, 05 Jan 2007 22:36:24 -0600
Subject: Learning to program in Python
In-Reply-To: <1168028517.005902.172880@11g2000cwr.googlegroups.com>
References: <1168028517.005902.172880@11g2000cwr.googlegroups.com>
Message-ID: <508na9F1d6c9nU1@mid.individual.net>

jbchua wrote:
> Hello everybody.
> 
> I am an Electrical Engineering major and have dabbled in several
> languages such as Python, C, and Java in my spare time because of my
> interest in programming. However, I have not done any practical
> programming because I have no idea where to get started. I taught
> myself these languages basically by e-tutorials and books. This makes
> me feel as if I don't really know how to implement these languages.
> Does anybody have any advice on where to start applying my limited
> knowledge practically in order to advance my learning?

This would be a good site to investigate.

http://diveintopython.org/


From steven.bethard at gmail.com  Thu Jan 18 17:08:05 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 18 Jan 2007 15:08:05 -0700
Subject: A note on heapq module
In-Reply-To: <1169117876.063858.56570@s34g2000cwa.googlegroups.com>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<slrneqs4vp.b4s.apardon@rcpc42.vub.ac.be>
	<4Yidnf9NFKFm7jPYnZ2dnUVZ_u3inZ2d@comcast.com>
	<1169117876.063858.56570@s34g2000cwa.googlegroups.com>
Message-ID: <8NSdnf38_otYcjLYnZ2dnUVZ_tadnZ2d@comcast.com>

bearophileHUGS at lycos.com wrote:
> Steven Bethard:
>> Antoon Pardon:
>>> For me, your class has the same drawback as the heappush, heappop
>>> procedurers: no way to specify a comparision function.
>> Agreed.  I'd love to see something like ``Heap(key=my_key_func)``.
> 
> It can be done, but the code becomes more complex and hairy:
> http://rafb.net/p/iCCmDz16.html

Cool!

The current code fails when using unbound methods however::

     >>> heap = Heap()
     >>> Heap.push(heap, 1)
     Traceback (most recent call last):
       File "<interactive input>", line 1, in <module>
     AttributeError: type object 'Heap' has no attribute 'push'

I would have written the code like::

     def smallest(self):
         result = self._heap[0]
         if self._key is not None:
             result = result[2]
         return result

     def push(self, item):
         if self._key is not None:
             item = self._key(item), self._itemid, item
             self._itemid += 1
         heappush(self._heap, item)

     def pop(self):
         result = heappop(self._heap)
         if self._key is not None:
             result = result[2]
         return result

     def popn(self, n):
         result = [heappop(self._heap) for _ in xrange(n)]
         if self._key is not None:
             result = [item[2] for item in result]
         return result

     def replace(self, item):
         if self._key is not None:
             item = self._key(item), self._itemid, item
             self._itemid += 1
         result = heapreplace(self._heap, item)
         if self._key is not None:
             result = result[2]
         return result

This allows unbound methods to work, and substantially lowers the code 
duplication. It does add a few extra if statements, but since they're 
``is`` tests, they should be pretty fast.

STeVe


From inq1ltd at verizon.net  Mon Jan 15 18:12:42 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Mon, 15 Jan 2007 18:12:42 -0500
Subject: download win32file
In-Reply-To: <501e09e0701151502x352e4b42hb353a44d0319fd54@mail.gmail.com>
References: <mailman.2742.1168900097.32031.python-list@python.org>
	<200701151805.19483.inq1ltd@verizon.net>
	<501e09e0701151502x352e4b42hb353a44d0319fd54@mail.gmail.com>
Message-ID: <200701151812.42241.inq1ltd@verizon.net>

On Monday 15 January 2007 18:02, Bill Tydeman 
wrote:
> > ?? Do I have to download pywin32 to get
> > win32ui, or win32file, or win32api
>
> Yes
Got it.
Thank you.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Jan 12 11:58:05 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 12 Jan 2007 17:58:05 +0100
Subject: context managers and generators
References: <1168611420.448058.163860@11g2000cwr.googlegroups.com>	<mailman.2646.1168613499.32031.python-list@python.org>
	<1168614604.273032.173650@51g2000cwl.googlegroups.com>
	<mailman.2647.1168615482.32031.python-list@python.org>
Message-ID: <50pt0tF1h5hj5U2@mid.individual.net>

Laszlo Nagy wrote:
 
>> I'm still thinking there is a better way to do it, and would
>> appreciate any ideas.
>   
> Everything can be implemented with goto and arrays.

But is that really better?

Regards,


Bj?rn

-- 
BOFH excuse #174:

Backbone adjustment



From zhouchengly at gmail.com  Wed Jan 17 01:36:55 2007
From: zhouchengly at gmail.com (shellon)
Date: 16 Jan 2007 22:36:55 -0800
Subject: How to convert float to sortable integer in Python
In-Reply-To: <pan.2007.01.16.09.53.46.92208@REMOVE.THIS.cybersource.com.au>
References: <1168939312.223194.184770@l53g2000cwa.googlegroups.com>
	<pan.2007.01.16.09.53.46.92208@REMOVE.THIS.cybersource.com.au>
Message-ID: <1169015814.960023.40310@a75g2000cwd.googlegroups.com>

I'm sorry I mistake the function name, the function is
floatToRawIntBits(), it convert ieee 754 floating point number to
integer,  e.g. if f1>f2 then floatToRawBits(f1) > floatToRawBits(f1)
I want convert floating point number to sortable string to index in
Lucene, so I want first to conver the floating point number to integer
first, and than convert the integer to sortable string?

so How to convert a ieee 754 floating point to raw bits like the java
api floatToRawBits do?

Appreciate your help!

Steven D'Aprano wrote:

> On Tue, 16 Jan 2007 01:21:52 -0800, shellon wrote:
>
> > Hi all:
> >     I want to convert the float number to sortable integer, like the
> > function float2rawInt() in java, but I don't know the internal
> > expression of float, appreciate your help!
>
> Google says:
>
> Your search - float2rawInt - did not match any documents.
>
> Are you sure about that function? What's a sortable integer?
> 
> 
> -- 
> Steven.



From seandavi at gmail.com  Thu Jan 11 07:49:21 2007
From: seandavi at gmail.com (Sean Davis)
Date: 11 Jan 2007 04:49:21 -0800
Subject: Read from database, write to another database, simultaneously
In-Reply-To: <eo4sor$du4$1@upsn250.cri.u-psud.fr>
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
	<50l9dlF1fuc1sU1@mid.individual.net>
	<eo4sor$du4$1@upsn250.cri.u-psud.fr>
Message-ID: <1168519760.894380.303990@i39g2000hsf.googlegroups.com>



On Jan 11, 3:20 am, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
> Bjoern Schliessmann a ?crit :
>
> > Sean Davis wrote:
>
> >> The author of one of the python database clients mentioned that
> >> using one thread to retrieve the data from the oracle database and
> >> another to insert the data into postgresql with something like a
> >> pipe between the two threads might make sense, keeping both IO
> >> streams busy.
>
> > IMHO he's wrong. Network interaction is quite slow compared with CPU
> > performance, so there's no gain (maybe even overhead due to thread
> > management and locking stuff). That's true even on multiprocessor
> > machines, not only because there's almost nothing to compute but
> > only IO traffic. CMIIW.Not so sure, there is low CPU in the Python script, but there may be
> CPU+disk activity on the database sides [with cache management and other
> optimizations on disk access].
> So, with a reader thread and a writer thread, he can have a select on a
> database performed in parallel with an insert on the other database.
> After, he must know if the two databases use same disks, same
> controller, same host... or not.

Some more detail:

The machine running the script is distinct from the Oracle machine
which is distinct from the Postgresql machine.  So, CPU usage is low
and because of the independent machines for the database end, it is
definitely possible to read from one database while writing to the
other.  That is the solution that I am looking for, and Dennis's post
seems pretty close to what I need.  I will have to use some kind of
buffer.  A Queue isn't quite right as it stands, as the data is coming
in as records, but for postgres loading, a file-like stream is what I
need, so there will need to be either a wrapper around the Queue on the
get() side.  Or is there a better way to go about this detail?  What
seems to make sense to me is to stringify the incoming oracle data into
some kind of buffer and then read on the postgresql side.

Thanks,
Sean



From itoakya at gmail.com  Thu Jan  4 06:16:22 2007
From: itoakya at gmail.com (itoakya at gmail.com)
Date: 4 Jan 2007 03:16:22 -0800
Subject: Convert Perl to Python
References: <mailman.2117.1167378630.32031.python-list@python.org>
Message-ID: <1167909381.460119.277400@42g2000cwt.googlegroups.com>

pyperl - Perl for Python
------------------------
"This is a Python extension module that makes it possible to embed Perl
interpreter(s) in any Python program.  It can be used to invoke
arbitrary Perl code, load any Perl modules and make calls directly
into Perl functions.  The Perl code invoked can call back into Python
as it see fit."
http://wiki.python.org/moin/PyPerl
At least, a pacific coexistence between Python and Perl.



From gagsl-py at yahoo.com.ar  Tue Jan  2 10:24:30 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 02 Jan 2007 12:24:30 -0300
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167526509.471697.320750@v33g2000cwv.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<4595B214.3070405@v.loewis.de>
	<1167526509.471697.320750@v33g2000cwv.googlegroups.com>
Message-ID: <7.0.1.0.0.20070102121201.0324ed78@yahoo.com.ar>

At Saturday 30/12/2006 21:55, Ben Sizer wrote:

>python setup.py install
>
>On Unix, you'd run this command from a shell prompt; on Windows, you
>have to open a command prompt window (``DOS box'') and do it there; "
>
>Pretty much none of the instructions in that part of the docs will work
>without you altering your path beforehand. Python's cross-platform
>nature means people rightly expect the same instructions to work on
>Linux and Windows from a standard installation. Right now, they don't.

Notice that there is NO need to alter the system path. You just have 
to tell Windows where python.exe resides; there is a per-application 
path located at 
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths.
In order to launch Python just writing "python" at the command 
prompt, the installer should -instead of playing with the system 
path- create a new key below App Paths, named "python.exe", and set 
its default value to the full path of the installed python executable.
See 
http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/programmersguide/shell_basics/shell_basics_extending/fileassociations/fa_perceived_types.asp


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From tomerfiliba at gmail.com  Tue Jan 23 09:46:20 2007
From: tomerfiliba at gmail.com (gangesmaster)
Date: 23 Jan 2007 06:46:20 -0800
Subject: free variables /cell objects question
In-Reply-To: <Xns98C17C03B6297duncanbooth@127.0.0.1>
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com>
	<Xns98C17C03B6297duncanbooth@127.0.0.1>
Message-ID: <1169563580.634000.122540@v45g2000cwv.googlegroups.com>

ugliness :)

so this is why [lambda: i for i in range(10)] will always return 9.
imho that's a bug, not a feature.


thanks.
-tomer

Duncan Booth wrote:
> "gangesmaster" <tomerfiliba at gmail.com> wrote:
>
> > what problem does the cell object solve?
>
> The closure represents the variable, not the object. So if x is rebound to
> a different object your inner function g() will now access the new object.
> If the object itself was passed to MAKE_CLOSURE then g would only ever see
> the value of x from the instant when g was defined.
>
> >>> def f(x):
>     def g():
>         print "x is", x
>     g()
>     x += 1
>     g()
> 
> 	
> >>> f(1)
> x is 1
> x is 2



From roopesh.raj at gmail.com  Tue Jan 16 11:09:01 2007
From: roopesh.raj at gmail.com (Roopesh)
Date: 16 Jan 2007 08:09:01 -0800
Subject: sslerror: (8, 'EOF occurred in violation of protocol')
Message-ID: <1168963738.710991.238580@a75g2000cwd.googlegroups.com>

I am getting an SSL error while fetching mails from Gmail over SSL on
Port 995. This problem occurs occasionally only, otherwise it works
file. Any idea why it happens.

Exception in thread Thread-1:
Traceback (most recent call last):
  File "c:\python24\lib\threading.py", line 442, in __bootstrap
    self.run()
  File
"C:\The_email_archive_system\email_archiver\pensive\mail_source.py",
line
 425, in run
    self.download_mails ()
  File
"C:\The_email_archive_system\email_archiver\pensive\mail_source.py",
line
 403, in download_mails
    mymsg = M.retr(msg_no)
  File "c:\python24\lib\poplib.py", line 237, in retr
    return self._longcmd('RETR %s' % which)
  File "c:\python24\lib\poplib.py", line 172, in _longcmd
    return self._getlongresp()
  File "c:\python24\lib\poplib.py", line 157, in _getlongresp
    line, o = self._getline()
  File "c:\python24\lib\poplib.py", line 374, in _getline
    self._fillBuffer()
  File "c:\python24\lib\poplib.py", line 364, in _fillBuffer
    localbuf = self.sslobj.read()
sslerror: (8, 'EOF occurred in violation of protocol')


Regards
Roopesh



From ruan at jcmills.com  Wed Jan 31 11:49:53 2007
From: ruan at jcmills.com (Dongsheng Ruan)
Date: Wed, 31 Jan 2007 11:49:53 -0500
Subject: What is the dummy statement that do nothing in Python?
Message-ID: <epqhre$qtp$1@netnews.upenn.edu>

I remember that in python there is some kind of dummy statement that just 
holds space and does nothing.

I want it to hold the place after a something like if a>b: do nothing

I can't just leave the space blank after if statement because there will be 
error message.

Does anybody know what to insert there?

Thanks! 




From steve at REMOVEME.cybersource.com.au  Wed Jan 24 00:34:13 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 24 Jan 2007 16:34:13 +1100
Subject: Overloading assignment operator
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
	<1169604475.177104.40330@s48g2000cws.googlegroups.com>
Message-ID: <pan.2007.01.24.05.34.12.348925@REMOVEME.cybersource.com.au>

On Tue, 23 Jan 2007 18:07:55 -0800, Russ wrote:

> Achim Domma wrote:
>> Hi,
>>
>> I want to use Python to script some formulas in my application. The user
>> should be able to write something like
>>
>> A = B * C
>>
>> where A,B,C are instances of some wrapper classes. Overloading * is no
>> problem but I cannot overload the assignment of A. I understand that
>> this is due to the nature of Python, but is there a trick to work around
>> this?
>> All I'm interested in is a clean syntax to script my app. Any ideas are
>> very welcome.
>>
>> regards,
>> Achim
> 
> Why do you need to overload assignment anyway? If you overloaded "*"
> properly, it should return
> the result you want, which you then "assign" to A as usual. Maybe I'm
> missing something.

One common reason for overriding assignment is so the left-hand-side of
the assignment can choose the result type. E.g. if Cheddar, Swiss and
Wensleydale are three custom classes, mutually compatible for
multiplication:

B = Cheddar()  # B is type Cheddar
C = Swiss()    # C is type Swiss
# without overloading assignment
A = B * C      # A is (possibly) Cheddar since B.__mul__ is called first
A = C * B      # A is (possibly) Swiss since C.__mul__ is called first
# with (hypothetical) assignment overloading 
A = B * C      # A is type Wensleydale since A.__assign__ is called

Except, of course, there is no assignment overloading in Python. There
can't be, because A may not exist when the assignment is performed, and
if it does exist it might be a complete different type.

Instead, you can do something like this:
 
A = Wensleydale(B) * Wensleydale(C)

or 

A = Wensleydale(B * C)




-- 
Steven D'Aprano 



From hg at nospam.org  Mon Jan 15 10:37:47 2007
From: hg at nospam.org (hg)
Date: Mon, 15 Jan 2007 16:37:47 +0100
Subject: download win32file
References: <mailman.2742.1168900097.32031.python-list@python.org>
Message-ID: <_mTqh.49191$kn7.39312@newsfe23.lga>

jim-on-linux wrote:

> 
> 
> Where can I download win32file / win32ui?
> 
> The links below are broken.  Mark Hammond should
> be made aware of this.
> 
> 
> URL below has two links that send you no place
> http://mail.python.org/pipermail/python-list/2002-October/167638.html
> 
> 
> Links:
> http://starship.python.net/crew/mhammond/win32/Downloads.html
> 
> http://starship.python.net/crew/mhammond/downloads/win32all-148.exe
> 
> 
> Produce;
> 
>  The requested URL was not found on this server.
> The link on the referring page seems to be wrong
> or outdated. Please inform the author of that
> page about the error.
> 
> jim-on-linux
Do you mean PyWin32 ?

http://sourceforge.net/projects/pywin32/



From sean at seanodonnell.com  Fri Jan  5 03:53:42 2007
From: sean at seanodonnell.com (Sean O'Donnell)
Date: Fri, 05 Jan 2007 00:53:42 -0800
Subject: Problem installing MySQLdb/1.2.1_p2 with Python/2.4.1 and
	MySQL/5.0.18
In-Reply-To: <506hbbF1eqkd8U1@mid.uni-berlin.de>
References: <459e0752$0$17009$4c368faf@roadrunner.com>
	<506hbbF1eqkd8U1@mid.uni-berlin.de>
Message-ID: <459e148d$0$8975$4c368faf@roadrunner.com>

Diez B. Roggisch wrote:
> Sean O'Donnell schrieb:
>> Hi,
>>
>> I can't seem to get MySQLdb/1.2.1p2 to install on Slackware/10.2, with
>> Python/2.4.1, and MySQL/5.0.18.
>>
>> The following command:
>>
>> $ python setup.py build 2> setup.err
>>
>> returns the following errors:
>>
>> http://pastebin.com/851624
>>
>> Any suggestions?
> 
> Install the mysql developer package that contains the needed includefiles.
> 
> Diez

doh... I forgot that I installed MySQL/5.0.18 from the binary
distribution, not the source (as I thought I had done back when).

Thanks!


From steve at REMOVEME.cybersource.com.au  Sun Jan 14 23:17:59 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Mon, 15 Jan 2007 15:17:59 +1100
Subject: How naive is Python?
References: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>
Message-ID: <pan.2007.01.15.04.17.58.757581@REMOVEME.cybersource.com.au>

On Mon, 15 Jan 2007 03:25:01 +0000, John Nagle wrote:

>     How naive (in the sense that compiler people use the term)
> is the current Python system?  For example:
> 
> 	def foo() :
> 	    s = "This is a test"
> 	    return(s)
> 
>          s2 = foo()
> 
> How many times does the string get copied?


Let's find out. Results below for Python 2.3 -- other versions may vary.

>>> def foo():
...     s = "This is a test"
...     return s
...
>>> def foo2():
...     return "This is a test"
...
>>> import dis
>>> dis.dis(foo)
  2           0 LOAD_CONST               1 ('This is a test')
              3 STORE_FAST               0 (s)

  3           6 LOAD_FAST                0 (s)
              9 RETURN_VALUE
             10 LOAD_CONST               0 (None)
             13 RETURN_VALUE
>>> dis.dis(foo2)
  2           0 LOAD_CONST               1 ('This is a test')
              3 RETURN_VALUE
              4 LOAD_CONST               0 (None)
              7 RETURN_VALUE

foo and foo2 functions compile to different byte-code. foo does a little
more work than foo2, but it is likely to be a trivial difference.

>>> s1 = foo()
>>> s2 = foo()
>>> s1 == s2, s1 is s2
(True, True)

So the string "This is a test" within foo is not copied each time the
function is called. However, the string "This is a test" is duplicated
between foo and foo2 (the two functions don't share the same string
instance):

>>> s3 = foo2()
>>> s3 == s1, s3 is s1
(True, False)


 
> Or, for example:
> 
>          s1 = "Test1"
> 	s2 = "Test2"
> 	s3 = "Test3"
> 	s = s1 + s2 + s3
> 
> Any redundant copies performed, or is that case optimized?

I don't believe it is optimized. I believe that in Python 2.5 simple
numeric optimizations are performed, so that "x = 1 + 3" would compile to
"x = 4", but I don't think that holds for strings. If you are running 2.5,
you could find out with dis.dis.



> How about this?
> 
> 	kcount = 1000
> 	s = ''
> 	for i in range(kcount) :
> 	    s += str(i) + ' '
> 
> Is this O(N) or O(N^2) because of recopying of "s"?

That will be O(N**2), except that CPython version 2.4 (or is it 2.5?) can,
sometimes, optimize it. Note that this is an implementation detail, and
doesn't hold for other Pythons like Jython, IronPython or PyPy.



-- 
Steven D'Aprano 



From felipe.lessa at gmail.com  Mon Jan  8 11:01:08 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Mon, 8 Jan 2007 14:01:08 -0200
Subject: Suitability for long-running text processing?
In-Reply-To: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>
References: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>
Message-ID: <c2701f5c0701080801w4d3c378elf901db19610a2e9e@mail.gmail.com>

On 1/8/07, tsuraan <tsuraan at gmail.com> wrote:
[snip]
> The loop is deep enough that I always interrupt it once python's size is
> around 250 MB.  Once the gc.collect() call is finished, python's size has
> not changed a bit.
[snip]
> This has been tried under python 2.4.3 in gentoo linux and python 2.3 under
> OS X.3.  Any suggestions/work arounds would be much appreciated.

I just tried on my system

(Python is using 2.9 MiB)
>>> a = ['a' * (1 << 20) for i in xrange(300)]
(Python is using 304.1 MiB)
>>> del a
(Python is using 2.9 MiB -- as before)

And I didn't even need to tell the garbage collector to do its job. Some info:

$ cat /etc/issue
Ubuntu 6.10 \n \l

$ uname -r
2.6.19-ck2

$ python -V
Python 2.4.4c1

-- 
Felipe.


From aboudouvas at panafonet.gr  Wed Jan 31 09:27:46 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 31 Jan 2007 06:27:46 -0800
Subject: "Correct" db adapter
Message-ID: <1170253666.826691.276800@s48g2000cws.googlegroups.com>

Hi to all,

i have started a month ago to seriously studying Python. I am now
looking at the databases stuff
and i want the opinion of more experienced Python programmers (than
me) at the following :

I see that there are a lot of databases adapters on the net, some
following the DB-API 2.0 and some others do not. I want to use a db-
module that do not tie me down to a specific database and that fully
supports DB-API 2.0
Now i am using Sql Server but who knows about tomorrow.

I started using pyodbc and looking how i can e.x. call stored
procedure with arguments and all that stuff.
This is using ODBC syntac and i found enough info on the net.

Is the approach i took the "correct" one or is there a better db-
module so i can use ?

Thanks in advance



From osv at javad.com  Thu Jan 11 05:21:38 2007
From: osv at javad.com (Sergei Organov)
Date: Thu, 11 Jan 2007 13:21:38 +0300
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<1168452879.866265.36880@i39g2000hsf.googlegroups.com>
	<eo3bgm$c98$1@gemini.csx.cam.ac.uk>
	<mailman.2544.1168455985.32031.python-list@python.org>
	<eo3eqs$icv$1@gemini.csx.cam.ac.uk>
Message-ID: <eo533i$u0j$1@sea.gmane.org>

nmm1 at cus.cam.ac.uk (Nick Maclaren) writes:

> In article <mailman.2544.1168455985.32031.python-list at python.org>,
> Sergei Organov <osv at javad.com> writes:
> |> 
> |> Do you mean that POSIX threads are inherently designed and implemented
> |> to stay idle most of the time?! If so, I'm afraid those guys that
> |> designed POSIX threads won't agree with you. In particular, as far as I
> |> remember, David R. Butenhof said a few times in comp.programming.threads
> |> that POSIX threads were primarily designed to meet parallel programming
> |> needs on SMP, or at least that was how I understood him.
>
> I do mean that, and I know that they don't agree.  However, the word
> "designed" doesn't really make a lot of sense for POSIX threads - the
> one I tend to use is "perpetrated".

OK, then I don't think the POSIX threads were "perpetrated" to be idle
most of time.

> The people who put the specification together were either unaware of
> most of the experience of the previous 30 years, or chose to ignore it.
> In particular, in this context, the importance of being able to control
> the scheduling was well-known, as was the fact that it is NOT possible
> to mix processes with different scheduling models on the same set of
> CPUs.  POSIX's facilities are completely hopeless for that purpose, and
> most of the systems I have used effectively ignore them.

I won't argue that. On the other hand, POSIX threads capabilities in the
field of I/O-bound and real-time threads are also limited, and that's
where "threads that are idle most of time" idiom comes from, I
think. What I argue, is that POSIX were "perpetrated" to support
I/O-bound or real-time apps any more than to support parallel
calculations apps. Besides, pthreads real-time extensions came later
than pthreads themselves.

What I do see, is that Microsoft designed their system so that it's
almost impossible to implement an interactive application without using
threads, and that fact leads to the current situation where threads are
considered to be beasts that are sleeping most of time.

> I could go on at great length, and the performance aspects are not even
> the worst aspect of POSIX threads.  The fact that there is no usable
> memory model, and the synchronisation depends on C to handle the
> low-level consistency, but there are no CONCEPTS in common between
> POSIX and C's memory consistency 'specifications' is perhaps the worst.

I won't argue that either. However, I don't see how does it make POSIX
threads to be "perpetrated" to be idle most of time.

> That is why many POSIX threads programs work until the genuinely
> shared memory accesses become frequent enough that you get some to the
> same location in a single machine cycle.

Sorry, I don't understand. Are you saying that it's inherently
impossible to write an application that uses POSIX threads and that
doesn't have bugs accessing shared state? I thought that pthreads
mutexes guarantee sequential access to shared data. Or do you mean
something entirely different? Lock-free algorithms maybe?

-- Sergei.



From steve at holdenweb.com  Mon Jan 29 08:08:59 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 29 Jan 2007 13:08:59 +0000
Subject: Data structure and algorithms
In-Reply-To: <epk7f5$6ha$1@sea.gmane.org>
References: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
	<epk7f5$6ha$1@sea.gmane.org>
Message-ID: <epkrl8$8r3$1@sea.gmane.org>

Terry Reedy wrote:
> "azrael" <jura.grozni at gmail.com> wrote in message 
[...]
> |
> | but this was not dinamicly enough for me (or my prof.) so
> 
> dynamic?  I have no idea what you mean by 'not dynamic enough'.
> 
> Python is not C or C++.  It does not have pointers.  Trying to program in C 
> in Python does not work too well.
> 
Mostly because Python variables are precisely pointers to object values 
allocated from a heap.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From nmm1 at cus.cam.ac.uk  Thu Jan 25 14:36:39 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 25 Jan 2007 19:36:39 GMT
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169675599.502726.5070@a34g2000cwb.googlegroups.com>
	<ep9t4g$uf$1@gemini.csx.cam.ac.uk>
	<1169751828.986583.47200@j27g2000cwj.googlegroups.com>
Message-ID: <epb0s7$g2s$1@gemini.csx.cam.ac.uk>


In article <1169751828.986583.47200 at j27g2000cwj.googlegroups.com>,
"Paddy" <paddy3118 at netscape.net> writes:
|> 
|> > |> Three to four months before `strange errors`? I'd spend some time
|> > |> correlating logs; not just for your program, but for everything running
|> > |> on the server. Then I'd expect to cut my losses and arrange to safely
|> > |> re-start the program every TWO months.
|> > |> (I'd arrange the re-start after collecting logs but before their
|> > |> analysis. Life is too short).
|> >
|> > Forget it.  That strategy is fine in general, but is a waste of time
|> > where threading issues are involved (or signal handling, or some types
|> > of communication problem, for that matter).
|> 
|> Nah, Its a great strategy. it keeps you up and running when all you
|> know for sure is that you will most likely be able to keep things
|> together for three months normally.
|> 
|> The OP only thinks its a threading problem - it doesn't matter what the
|> true fix will be, as long as arranging to re-start the server well
                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|> before its likely to go down doesn't take too long, compared to your
   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|> exploration of the problem, and, of course, you have to be able to
|> afford the glitch in availability.

Consider the marked phrase in the context of a Poisson process failure
model, and laugh.  If you don't understand why I say that, I suggest
finding out the properties of the Poisson process!


Regards,
Nick Maclaren.


From ziga.seilnacht at gmail.com  Sun Jan 21 10:19:00 2007
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 21 Jan 2007 07:19:00 -0800
Subject: Number methods
References: <eolbjl$12n$1@gemini.csx.cam.ac.uk>
Message-ID: <1169392740.130549.174200@38g2000cwa.googlegroups.com>

Nick Maclaren wrote:
> I can't find any description of these.  Most are obvious, but some
> are not.  Note that this is from the point of view of IMPLEMENTING
> them, not USING them.  Specifically:

The Python equivalents of these methods are described in the
reference manual:
http://docs.python.org/ref/numeric-types.html

More details can be founf in various PEPs:
http://www.python.org/dev/peps/

> Does Python use classic division (nb_divide) and inversion (nb_invert)
> or are they entirely historical?  Note that I can very easily provide
> the latter.

Python uses classic divison by default. True divison is used only when
the division __future__ directive is in effect. See PEP 238 for
details:
http://www.python.org/dev/peps/pep-0238/

The nb_invert method is used for the implementation of the bitwise
inverse unary operator (~). I don't think that it is deprecated. See:
http://docs.python.org/lib/bitstring-ops.html for details.

> Is there any documentation on the coercion function (nb_coerce)?  It
> seems to have unusual properties.

It is used for old style Python classes and extension types that
don't have Py_TPFLAGS_CHECKTYPES in their tp_flags. See:
http://docs.python.org/ref/coercion-rules.html
and
http://www.python.org/dev/peps/pep-0208/
for details.

Ziga



From chris at wavestore.com  Tue Jan 30 11:40:52 2007
From: chris at wavestore.com (Christopher Mocock)
Date: Tue, 30 Jan 2007 16:40:52 +0000
Subject: Please take me off the list
In-Reply-To: <1170174428.224923.5500@p10g2000cwp.googlegroups.com>
References: <B40EE572-0110-1000-9DC8-F4C4A789181E-Webmail-10019@mac.com>	<mailman.3308.1170171186.32031.python-list@python.org>
	<1170174428.224923.5500@p10g2000cwp.googlegroups.com>
Message-ID: <45BF7514.50109@wavestore.com>

Paul Boddie wrote:
> See also the Tutor mailing list, which might be a bit better for 
> starting to learn Python, should you (Daniel) decide to change your 
> mind. Here's the mailing list's Web page:
> 
> http://mail.python.org/mailman/listinfo/tutor
> 
> If you haven't seen much information for beginners, take a look at 
> these pages for some references:
> 
> http://www.python.org/about/gettingstarted/
> http://wiki.python.org/moin/BeginnersGuide
> 
> Paul

I was expecting to see a barrage of joke emails after reading the OP but
that's really useful information for me too as a bit of a beginner. Thanks.

Chris.


From jUrner at arcor.de  Wed Jan  3 15:40:40 2007
From: jUrner at arcor.de (jUrner at arcor.de)
Date: 3 Jan 2007 12:40:40 -0800
Subject: M. Hammonds python panel
Message-ID: <1167856840.117284.78420@k21g2000cwa.googlegroups.com>

Hello all

I am a great fan of Mark Hammonds python pannel. But since starship
went down it didn't come up again ...with the link in my favs to
http://starship.python.net/crew/mhammond/mozilla/pythonpanel.xul
still pointing nowhere.

Maybe Mark is around here somewhere...

J?rgen



From gagsl-py at yahoo.com.ar  Mon Jan 29 23:54:58 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 01:54:58 -0300
Subject: Convert raw data to XML
References: <1170124927.718200.225080@m58g2000cwm.googlegroups.com>
Message-ID: <op.tmx8o9f7sd1mbx@gabriel2.softlabbsas.com.ar>

En Mon, 29 Jan 2007 23:42:07 -0300, <elrondrules at gmail.com> escribi?:

> For example the raw data is as follows
>
> <?xml version="1.0" ?><Blah><ABC><Id id="1"/><Description>SomeText </
> Description><Result>PassorFail</Result></ABC></Blah>
>
> without spaces or new lines. I need this to be written into an XML
> file as
> [same content but nicely indented]

Is the file supposed to be processed by humans? If not, just write it as  
you receive it.
Spaces and newlines and indentation are mostly irrelevant on an xml file.

-- 
Gabriel Genellina



From sturlamolden at yahoo.no  Sun Jan 14 01:37:04 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 13 Jan 2007 22:37:04 -0800
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
In-Reply-To: <1168735174.140171.74930@v45g2000cwv.googlegroups.com>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
	<eo78ah$dqc$1@sea.gmane.org>
	<mailman.2633.1168583356.32031.python-list@python.org>
	<1168715634.695961.14710@l53g2000cwa.googlegroups.com>
	<1168728465.178605.218850@q2g2000cwa.googlegroups.com>
	<1168735174.140171.74930@v45g2000cwv.googlegroups.com>
Message-ID: <1168756624.569930.168990@51g2000cwl.googlegroups.com>

oyekomova wrote:

> Thanks for your note. I have 1Gig of RAM. Also, Matlab has no problem
> in reading the file into memory. I am just running Istvan's code that
> was posted earlier.

You have a CSV file of about 520 MiB, which is read into memory. Then
you have a list of list of floats, created by list comprehension, which
is larger than 274 MiB. Additionally you try to allocate a NumPy array
slightly larger than 274 MiB. Now your process is already exceeding 1
GiB, and you are probably running other processes too. That is why you
run out of memory.

So you have three options:

1. Buy more RAM.

2. Low-level code a csv-reader in C.

3. Read the data in chunks. That would mean something like this:


import time, csv, random
import numpy

def make_data(rows=6E6, cols=6):
    fp = open('data.txt', 'wt')
    counter = range(cols)
    for row in xrange( int(rows) ):
        vals = map(str, [ random.random() for x in counter ] )
        fp.write( '%s\n' % ','.join( vals ) )
    fp.close()

def read_test():
    start  = time.clock()
    arrlist = None
    r = 0
    CHUNK_SIZE_HINT = 4096 * 4 # seems to be good
    fid = file('data.txt')
    while 1:
        chunk = fid.readlines(CHUNK_SIZE_HINT)
        if not chunk: break
        reader = csv.reader(chunk)
        data = [ map(float, row) for row in reader ]
        arrlist = [ numpy.array(data,dtype=float), arrlist ]
        r += arrlist[0].shape[0]
        del data
        del reader
        del chunk
    print 'Created list of chunks, elapsed time so far: ', time.clock()
- start
    print 'Joining list...'
    data = numpy.empty((r,arrlist[0].shape[1]),dtype=float)
    r1 = r
    while arrlist:
        r0 = r1 - arrlist[0].shape[0]
        data[r0:r1,:] = arrlist[0]
        r1 = r0
        del arrlist[0]
        arrlist = arrlist[0]
    print 'Elapsed time:', time.clock() - start

make_data()
read_test()

This can process a CSV file of 6 million rows in about 150 seconds on
my laptop. A CSV file of 1 million rows takes about 25 seconds.

Just reading the 6 million row CSV file ( using fid.readlines() ) takes
about 40 seconds on my laptop. Python lists are not particularly
efficient. You can probably reduce the time to ~60 seconds by writing a
new CSV reader for NumPy arrays in a C extension.



From michael at mustun.ch  Thu Jan  4 10:41:56 2007
From: michael at mustun.ch (Michael M.)
Date: Thu, 04 Jan 2007 16:41:56 +0100
Subject: code optimization (calc PI) / New Algorithme for PI
In-Reply-To: <slrneppql6.3v8.nick@irishsea.home.craig-wood.com>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<slrneppql6.3v8.nick@irishsea.home.craig-wood.com>
Message-ID: <We9nh.196$Je6.90@nntpserver.swip.net>


Mainly, it was fload-div. Changed to int-div (python //) runs faster.

Yes, this "gmpy" sounds good for calc things like that.
But not available on my machine.
ImportError: No module named gmpy

Anyway, thanks for posting. This gmpy module can be very intersting.
But right now, the focus was, if it's possible to translate a strange C 
code into Python. And it is. Sure ;-)

Maybe, someone can also translate a very simple algorithm for calc a 
range of PI in Python. (Available Code for C.)
http://crd.lbl.gov/~dhbailey/

http://crd.lbl.gov/~dhbailey/bbp-codes/piqpr8.c

But seems to be removed? It was working last days. (Maybe removed from 
server.)


An other well known is: (but someone implemented this already in Python, 
slow, and, depends on the previouse calc values, like most other 
algorithmes.)

    pi   01   01   01   01   01 01 01 01 01 01
    __ = __ - __ + __ - __ + __-__+__-__+__-__
    04   01   03   05   07   09 11 13 15 17 19 ...

   pi/4 = 1/1 - 1/3 + 1/5 - 1/7 + 1/9 ...


Or things like that:
http://numbers.computation.free.fr/Constants/PiProgram/pifast.html




> There is more than one way to skin this cat.  A better algorithm helps
> a lot.
> 
> If I really wanted lots of digits of pi from python I'd do it like
> this.  This is an example of the right tool for the job. 0.5ms looks
> pretty good to me!
> 
>    >>> import math, gmpy
>    >>> bits = int(800/math.log10(2))
>    >>> start = time(); pi=gmpy.pi(bits); dt = time()-start
>    >>> print "That took",dt,"seconds"
>    That took 0.00055193901062 seconds
>    >>> pi
>    mpf('3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093844609550582231725359408128481117450284102701938521105559644622948954930381964428810975665933446128475648233786783165271201909145648566923460348610454326648213393607260249141273724587006606315588174881520920962829254091715364367892590360011330530548820466521384146951941511609433057270365759591953092186117381932611793105118548074462379962749567351885752724891227938183011949129833673362440656643086021394946395224737190702179860943702770539217176293176752384674818467669405132000568127145263560827785771342757789609173637178721468440901224953430146549585371050792279689258923542019956112129021960864034418159813629774771309960518707211349999998372978049951059731732816096318595024459455e0',2657)
>    >>> 
> 


From bdesth.quelquechose at free.quelquepart.fr  Thu Jan 18 15:36:14 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 18 Jan 2007 21:36:14 +0100
Subject: Traversing the properties of a Class
In-Reply-To: <1169141253.332211.12790@38g2000cwa.googlegroups.com>
References: <1169141253.332211.12790@38g2000cwa.googlegroups.com>
Message-ID: <45afd3ad$0$23680$426a74cc@news.free.fr>

EdG a ?crit :
> I'm using Python version 2.4 and I created a class with some properties
> like:
> 
> def GetCallAmount(self):
>         return somedata

<mode="pep08">
The recommended naming convention is all_lower,ie:
def get_call_amount(self):
</mode>

And FWIW, there are idioms to avoid polluting the class namespace, like:

class Account(object):
     @apply
     def amount():
        def fget(self):
            return something
        def fset(self, value):
            do_something_with(value)
        return property(**locals())

> For debugging purposes, I would like to traverse the class listing out
> all the properties.

cf Neil's answer.



From S.Mientki-nospam at mailbox.kun.nl  Thu Jan 11 14:47:26 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Thu, 11 Jan 2007 20:47:26 +0100
Subject: Need better run/edit method. I have to restart the shell after
	every script change.
In-Reply-To: <1168544475.849070.92160@77g2000hsv.googlegroups.com>
References: <1168544475.849070.92160@77g2000hsv.googlegroups.com>
Message-ID: <c437f$45a6943a$d443bb3a$11117@news.speedlinq.nl>

> As you can see, I'm wasting a lot of time with this method.  Maybe
> there is some better sofware available, or maybe I'm just not utilizing
> the tools at my disposal.  Either way I would greatly appreciate any
> insight into this problem. 
> 
why not try a more advanced IDE, like PyScripter ?

cheers,
Stef Mientki


From gonzlobo at gmail.com  Thu Jan 25 11:17:40 2007
From: gonzlobo at gmail.com (gonzlobo)
Date: Thu, 25 Jan 2007 09:17:40 -0700
Subject: Two dimensional lists
Message-ID: <be5994b50701250817l54b5c8a9g359b917eb8fdda75@mail.gmail.com>

I might get an answer since I didn't call them arrays. :^)

Ok, I have 2 lists that I need to process individually, then merge
them into a 2x list and fill with data.

arinc429 = ['ab', '2b', '0b', '21', 'c1', '61', '11', 'db', '9b', '5b', 'eb',
         '6b', '1b', '6e', '3e']
iPIDs = [300, 301, 320, 321]

merged[arinc429, iPIDs]

# PID & a429 are defined elsewhere

a_idx = iPIDs.index[PID]
p_idx = [arinc429.index[a429]

# shouldn't I be able to fill the lists simply by pointing to a location?

matrix[a_idx, p_idx] = 0x219 # and so on?

tia


From gagsl-py at yahoo.com.ar  Wed Jan  3 18:15:43 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 03 Jan 2007 20:15:43 -0300
Subject: pythoncom module
In-Reply-To: <4594D800.9040308@riddergarn.dk>
References: <4594D800.9040308@riddergarn.dk>
Message-ID: <7.0.1.0.0.20070103201308.03695500@yahoo.com.ar>

At Friday 29/12/2006 05:55, Scripter47 wrote:

>I need a module called "pythoncom" anyone that knows where a can find
>that module???

It's part of the pywin32 package
https://sourceforge.net/project/showfiles.php?group_id=78018


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From ziga.seilnacht at gmail.com  Wed Jan 31 11:50:57 2007
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 31 Jan 2007 08:50:57 -0800
Subject: Conditional expressions - PEP 308
In-Reply-To: <mailman.3325.1170193923.32031.python-list@python.org>
References: <mailman.3325.1170193923.32031.python-list@python.org>
Message-ID: <1170262257.491270.237240@j27g2000cwj.googlegroups.com>

Colin J. Williams wrote:
> It would be helpful if the rules of the game were spelled out more clearly.
>
> The conditional expression is defined as X if C else Y.
> We don't know the precedence of the "if" operator.  From the little test
> below, it seem to have a lower precedence than "or".

The rules are specified in the Python Reference Manual:
http://docs.python.org/ref/Booleans.html

Ziga



From shuanyu at gmail.com  Sat Jan  6 21:57:06 2007
From: shuanyu at gmail.com (many_years_after)
Date: 6 Jan 2007 18:57:06 -0800
Subject: How to invoke parent's method?
Message-ID: <1168138626.574514.102060@i15g2000cwa.googlegroups.com>

Hi, pythoners:

     My wxPython program includes  a panel whose parent is a frame. The
panel has a button. When I click the button , I want to let the frame
destroy. How to implement it? Could the panel invoke the frame's
method?
Thanks.



From PengYu.UT at gmail.com  Wed Jan  3 11:11:48 2007
From: PengYu.UT at gmail.com (PengYu.UT at gmail.com)
Date: 3 Jan 2007 08:11:48 -0800
Subject: When argparse will be in the python standard installation
Message-ID: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>

Hi,

I feel argparse has some useful things that optparse doesn't have. But
I can't find it argparse in python library reference. I'm wondering
when it will be available in the python standard installation.

Thanks,
Peng



From mpeters42 at gmail.com  Mon Jan  8 03:40:04 2007
From: mpeters42 at gmail.com (Mark Peters)
Date: 8 Jan 2007 00:40:04 -0800
Subject: regex question
In-Reply-To: <1168244922.620428.273260@38g2000cwa.googlegroups.com>
References: <1168232001.377605.236270@11g2000cwr.googlegroups.com>
	<45a1f0c6$0$18929$4c368faf@roadrunner.com>
	<1168243020.304940.212700@42g2000cwt.googlegroups.com>
	<pan.2007.01.08.08.15.54.609742@REMOVEME.cybersource.com.au>
	<1168244922.620428.273260@38g2000cwa.googlegroups.com>
Message-ID: <1168245604.911965.248360@11g2000cwr.googlegroups.com>

> is there any way i would be successful then, in using raw string inside
> my makeRE() function?

Why do you think you even need a raw string?

Just build and return the string 'a|b|c' (NOTE: DON'T add the quotes to
the string)



From konrad.hinsen at laposte.net  Fri Jan 12 12:13:28 2007
From: konrad.hinsen at laposte.net (Konrad Hinsen)
Date: Fri, 12 Jan 2007 18:13:28 +0100
Subject: Parallel Python
In-Reply-To: <1168610918.587465.197740@51g2000cwl.googlegroups.com>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
	<1168597288.571937.176430@s34g2000cwa.googlegroups.com>
	<mailman.2642.1168609719.32031.python-list@python.org>
	<1168610918.587465.197740@51g2000cwl.googlegroups.com>
Message-ID: <2543B387-D3A2-46C0-AE39-3B78A60A7F3F@laposte.net>

On Jan 12, 2007, at 15:08, Paul Boddie wrote:

> It seems to me that a more useful first step would be to create an
> overview of the different modules and put it on the python.org Wiki:
>
> http://wiki.python.org/moin/FrontPage
> http://wiki.python.org/moin/UsefulModules (a reasonable entry point)
>
> If no-one beats me to it, I may write something up over the weekend.

That sounds like a good idea. I won't beat you to it, but I'll have a  
look next week and perhaps add information that I have.

Konrad.
--
---------------------------------------------------------------------
Konrad Hinsen
Centre de Biophysique Mol?culaire, CNRS Orl?ans
Synchrotron Soleil - Division Exp?riences
Saint Aubin - BP 48
91192 Gif sur Yvette Cedex, France
Tel. +33-1 69 35 97 15
E-Mail: hinsen at cnrs-orleans.fr
---------------------------------------------------------------------




From arkanes at gmail.com  Fri Jan  5 14:51:13 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 5 Jan 2007 13:51:13 -0600
Subject: MySQLdb windows binaries for Python 2.5?? Yes,
	but from a World of Warcraft guild.
In-Reply-To: <Kwxnh.57300$qO4.34608@newssvr13.news.prodigy.net>
References: <1162408100.985370.148650@m7g2000cwm.googlegroups.com>
	<1163238145.257490.144410@b28g2000cwb.googlegroups.com>
	<mailman.2093.1163244341.11739.python-list@python.org>
	<Fgkgh.9311$hI.6215@newssvr11.news.prodigy.net>
	<Ulmgh.70$u%4.58@newsfe04.lga>
	<1166144355.616642.127080@n67g2000cwd.googlegroups.com>
	<x1pgh.9356$hI.3075@newssvr11.news.prodigy.net>
	<jOrgh.13632$wc5.10963@newssvr25.news.prodigy.net>
	<1168019043.523288.50770@38g2000cwa.googlegroups.com>
	<Kwxnh.57300$qO4.34608@newssvr13.news.prodigy.net>
Message-ID: <4866bea60701051151v4f7942bj2921b2143a18a092@mail.gmail.com>

On 1/5/07, John Nagle <nagle at animats.com> wrote:
> msj at infoserv.dk wrote:
> > Anyone have a binary they want to share?
> >
> > /Martin
> >
> Somebody has an untested one.  See
>
> http://sourceforge.net/forum/forum.php?thread_id=1571110&forum_id=70461
>
> You have to ask for a copy; they don't want to distribute it and
> be blamed for problems.
>
> There hasn't been a new release of MySQLdb since April 2006, and
> there's no official support for either Python 2.5 or Windows.
> Realistically, you have to run Python 2.4 or earlier if you
> need database access.  We dropped back to Python 2.4,
> with good results.
>
>                                 John Nagle
> --

I guess this is your opportunity, as someone who thinks that MySQL
support for Python is important, to assist in maintaining and updating
those wrappers, right?


From tpawley at gmail.com  Mon Jan 15 05:10:31 2007
From: tpawley at gmail.com (Torabisu)
Date: 15 Jan 2007 02:10:31 -0800
Subject: Python web app. (advice sought)
In-Reply-To: <mailman.2730.1168853555.32031.python-list@python.org>
References: <45aae51b.0@entanet><R62949312.665.5091.1@mxextra>
	<mailman.2730.1168853555.32031.python-list@python.org>
Message-ID: <1168855828.324888.31610@38g2000cwa.googlegroups.com>


Tim Williams wrote:
> On 15 Jan 2007 00:52:33 -0800, Torabisu <tpawley at gmail.com> wrote:
> >
> > Duncan Smith wrote:
> > > Hello,
> > >      I find myself in the, for me, unusual (and at the moment unique)
> > > position of having to write a web application.  I have quite a lot of
> > > existing Python code that will form part of the business logic.  This
> > > relies on 3rd party libraries (such as numpy) which would make porting
> > > to e.g. IronPython difficult (I would imagine).  I was thinking LAMP
> > > (the P standing for Python, of course), particularly as I was originally
> > > encouraged to go for open source solutions.
> > >
> > > The application will provide some basic statistical analyses of data
> > > contained in database tables and associated plots (R / matplotlib /
> > > graphviz).  There will also be some heavier duty Monte Carlo simulation
> > > and graphical modelling / MCMC.  The user(s) will need to be able to set
> > > model parameters; maybe even tinker with model structure, so it will be
> > > very interactive (AJAX?).
> > >
> > > I've had a look at Django, Turbogears and Plone, and at the moment I am
> > > torn between Turbogears and Plone.  I get the impression that Turbogears
> > > will require me to write more non-Python code, but maybe Plone is more
> > > than I need (steeper learning curve?).  Maybe Turbogears will lead to a
> > > more loosely coupled app. than Plone?
> > >
> > > The disconcerting thing is that others on the project (who won't be
> > > developing) have started to talk about a LAMP back end with an IIS front
> > > end, .NET, and the benefits of sharepoint.  The emphasis is supposed to
> > > be on rapid development, and these technologies are supposed to help.
> > > But I have no real familiarity with them at all; just Python, C and SQL
> > > to any realistic level of competence.
> > >
> > > Any advice would be greatly appreciated.  I have to do much of the
> > > statistical work too, so I need to make good choices (and hopefully be
> > > able to justify them so nobody else on the project makes inappropriate
> > > choices for me).  e.g. I don't mind learning Javascript if it doesn't
> > > take too long.  The physical server will initially be a multiprocessor
> > > machine with several GB of RAM.  But we also have a cluster (I have no
> > > details, I only started the project a week ago).  So any advice
> > > regarding parallelisation would also be appreciated (or, in fact, any
> > > useful advice / pointers at all).  Thanks.
> > >
> > > Duncan
> >
> > I was in a similar boat a while back, needing to make a decision on
> > what to use for our web development.  I had worked with Plone
> > previously and found that for our needs it wasn't going to work.  Our
> > web development was quite specific and didn't fit ideally into the
> > standard content management realm.  I also looked at Django and
> > TurboGears, installing and working with each.  I eventually went with
> > Django, and I've really enjoyed working with it.  Was a personal choice
> > and I'm sure our development would have been as successful if I'd
> > chosen TurboGears.
> >
> > If you want the strength of persistent layers, MVC, templating etc etc
> > but want to stay away from the heavier frameworks, another possibility
> > is http://webpy.org/.  Very simple to implement, lightweight yet still
> > fairly full of features.
> >
>
> Don't overlook Karrigell either,  with a tiny learning curve its
> always worth consideration, especially if you need rapid development
> and a web server that will sit on top of your exising .py modules.
>
> www.karrigell.com
>
> hth :)

Hmm, thanks for the link on Karrigell.  Never heard of it till now,
quite nice...



From nagle at animats.com  Thu Jan 11 14:29:59 2007
From: nagle at animats.com (nagle at animats.com)
Date: 11 Jan 2007 11:29:59 -0800
Subject: Wierd M2Crypto bug - phony "peer did not return certificate" error
References: <YK%oh.17173$sR.6972@newssvr29.news.prodigy.net>
	<ovWdnZTGuYL38jjYnZ2dnUVZ_rqdnZ2d@comcast.com>
Message-ID: <1168543799.097737.127930@i56g2000hsf.googlegroups.com>

  That's a problem for me.  I need short timeouts; I'm accessing sites
that might or might not have SSL support, and I need to quickly time
out when there's no SSL server.

  PyOpenSSL handles timeout correctly, but M2Crypto does not. On the
other hand, M2Crypto actually checks certificates, which PyOpenSSL does
not. So we have two broken implementations.

  Python needs a merge here. Read Guido van Rossum's rant on M2Crypto:

      http://www.artima.com/weblogs/viewpost.jsp?thread=95863

Both of these packages contain wrappers for OpenSSL, but both wrappers
are incompatible and buggy. M2Crypto also has some Python components.
The PyOpenSSL wrapper, which ships with Python, doesn't expose enough
of the OpenSSL API.  M2Crypto exposes more of the API, but doesn't work
as well.

What's probably needed is to implement the additional API functions of
the M2Crypto wrapper in the PyOpenSSL wrapper, so that the M2Crypto
components written in Python could be used with it. Then we'd have one
good implementation instead of two broken ones.

    John Nagle
    nagle at animats.com

(News feed broken, using Google Groups as backup.)



From Dieter_Deyke at CoCreate.com  Thu Jan 25 17:54:54 2007
From: Dieter_Deyke at CoCreate.com (Dieter Deyke)
Date: Thu, 25 Jan 2007 15:54:54 -0700
Subject: pdf to text
References: <epb638$gd4$1@solaris.cc.vt.edu>
	<86714$45b9254c$54d1d767$3741@news.chello.no>
	<epb9s7$nnk$1@solaris.cc.vt.edu>
Message-ID: <uwt3azphd.fsf@CoCreate.com>

tubby writes:

> David Boddie wrote:
>
>> The pdftotext tool may do what you want:
>>
>>   http://www.foolabs.com/xpdf/download.html
>>
>> Let us know how you get on with it.
>>
>> David
>
> Perhaps I'm just using pdftotext wrong? Here's how I was using it:
>
> f = filename
>
> try:
>     sout = os.popen('pdftotext "%s" - ' %f)
>     data = sout.read().strip()
>     print data
>     sout.close()
>
> except Exception, e:
>     print e

I am using pdftotext on Windows with cygwin on a regular basis without
any problem.

Your program above should read:

   sout = os.popen('pdftotext "%s" - ' % (f,))

--
Dieter Deyke

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?


From nmm1 at cus.cam.ac.uk  Fri Jan 12 10:05:23 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 12 Jan 2007 15:05:23 GMT
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<mailman.2597.1168550439.32031.python-list@python.org>
	<eo6ia5$5bt$1@gemini.csx.cam.ac.uk>
	<mailman.2643.1168611301.32031.python-list@python.org>
Message-ID: <eo883j$l9d$1@gemini.csx.cam.ac.uk>


In article <mailman.2643.1168611301.32031.python-list at python.org>,
Carsten Haese <carsten at uniqsys.com> writes:
|> On Thu, 2007-01-11 at 23:47 +0000, Nick Maclaren wrote:
|> > In article <mailman.2597.1168550439.32031.python-list at python.org>,
|> > Facundo Batista <facundo at taniquetil.com.ar> writes:
|> > |> Noud Aldenhoven wrote:
|> > |> 
|> > |> > When I was programming in a mathematical project I began to wonder if python
|> > |> > supports rational numbers[1]. In a language like magma[2] it's not such a
|> > |> > problem. Does python supports something simular?
|> > |> 
|> > |> Python does not have rational numbers.
|> > |> 
|> > |> There's a (rejected) PEP about this, PEP-239:
|> > |> 
|> > |>   http://www.python.org/dev/peps/pep-0239/
|> > |> 
|> > |> Maybe you also want to read the section "Why not rational?" of
|> > |> PEP-327...
|> > |> 
|> > |>   http://www.python.org/dev/peps/pep-0327/#why-not-rational
|> > 
|> > Oh, God.  Decimal delusions again :-(
|> > 
|> > There are good arguments for not having a rational type, but the idea
|> > that decimal floating-point is in any way a replacement is cuckoo.
|> 
|> You're putting words in Facundo's mouth. Facundo didn't say why we
|> should read that section of PEP 327. I think he merely pointed to the
|> slow performance of rational numbers that's explained in that section.
|> (Facundo is the author of PEP 327, so I find it unlikely that he has
|> delusions about what decimals can and can't do.)

You're putting words in MY mouth!  I didn't say that he did.  But I
agree that my words could easily be read that way, so I apologise for
any misunderstanding.

|> It is true that decimal arithmetic is not a replacement for rational
|> arithmetic, but I don't see anybody on this thread or in PEP 327 stating
|> that it is.

Read them again, more carefully :-(

The BDFL Pronouncement rejecting PEP 239 does, even if it does qualify
it by saying "to some extent".  And it was that PEP that I was primarily
referring to in that remark.

The "Why not rational?" section of PEP 327 quotes Alex Martelli as saying
that Rational are not worth doing without Decimal, which makes no sense
at all.  All it does is to plug Decimal for a purpose for which it is
completely unsuited; not all rational numbers have denumerators that are
powers of 10.


Regards,
Nick Maclaren.


From has.temp3 at virgin.net  Fri Jan 19 10:49:35 2007
From: has.temp3 at virgin.net (has)
Date: 19 Jan 2007 07:49:35 -0800
Subject: [ann] Appscript Installer 1.5 released
Message-ID: <1169221775.151715.199600@l53g2000cwa.googlegroups.com>

Announcing the release of Appscript Installer 1.5, containing all the
latest appscript-related modules, documentation and tools:

http://appscript.sourceforge.net/download.html

Appscript enhances the Python scripting language
(http://www.python.org) with robust, easy-to-use OS X application
scripting support, making Python a serious alternative to AppleScript
for automating your Mac.

This release contains several significant API changes, along with
various bugfixes and other internal improvements, and is recommended
for all users. In addition, the bundled osadict command line tool has
been overhauled to create a powerful interactive dictionary browser and
HTML exporter with support for py-appscript, rb-appscript and
AppleScript formatting styles.

(Existing appscript users: please read the 'API CHANGES' file included
with the appscript package before upgrading from older versions.)

For Python 2.3+ on Mac OS X 10.3 and later.

Enjoy,

has
-- 
http://appscript.sourceforge.net 
http://rb-appscript.rubyforge.org



From scott at crybabymaternity.com  Fri Jan  5 22:30:26 2007
From: scott at crybabymaternity.com (scott at crybabymaternity.com)
Date: 5 Jan 2007 19:30:26 -0800
Subject: Newbie XML SAX Parsing: How do I ignore an invalid token?
In-Reply-To: <mailman.2354.1168037149.32031.python-list@python.org>
References: <1168033818.692201.183790@11g2000cwr.googlegroups.com>
	<mailman.2354.1168037149.32031.python-list@python.org>
Message-ID: <1168054226.290465.325910@s34g2000cwa.googlegroups.com>

My original posting has a funky line break character (it appears as an
ascii square) that blows up my program, but it may or may not show up
when you view my message.

I was afraid to use element tree, since my xml files can be very long,
and I was concerned about using memory structures to hold all the data.
It is my understanding that SAX reads the file line by line?

Is there a way to account for the invalid token in the error handler? I
don't mind parsing out the bad characters on a case-by-case basis. The
weather data I am ingesting only seems to have this line break
character that the parser doesn't like.

Thanks!

Scott

Chris Lambacher wrote:
> What exactly is invalid about the XML fragment you provided?
> It seems to parse correctly with ElementTree:
> >>> from xml.etree import ElementTree as ET
> >>> e =  ET.fromstring("""
> ... <cities>
> ...   <city>
> ...     <name>Tampa</name>
> ...     <description>A great city ^^ and place to live</description>
> ...   </city>
> ...   <city>
> ...     <name>Clearwater</name>
> ...     <description>Beautiful beaches</description>
> ...   </city>
> ... </cities>
> ... """)
> >>> print ET.tostring(e)
> <cities>
>   <city>
>     <name>Tampa</name>
>     <description>A great city ^^ and place to live</description>
>   </city>
>   <city>
>     <name>Clearwater</name>
>     <description>Beautiful beaches</description>
>   </city>
> </cities>
> >>>
>
> Do you have invalid characters? unclosed tags?  The solution to each of these
> problems is different.  More info will solicit better solutions.
>
> -Chris
>
> On Fri, Jan 05, 2007 at 01:50:18PM -0800, scott at crybabymaternity.com wrote:
> > I've got an XML feed from a vendor that is not well-formed, and having
> > them change it is not an option.  I'm trying to figure out how to
> > create an error-handler that will ignore the invalid token and continue
> > on.
> >
> > The file is large, so I'd prefer not to put it all in memory or save it
> > off and strip out the bad characters before I parse it.
> >
> > I've included one of the problematic characters in a small XML snippet
> > below.
> >
> > I'm new to Python, and I don't know how to accomplish this. Any help is
> > greatly appreciated!
> >
> > -----------------------------------------------------------------
> >
> > Here is my code:
> >
> > from xml.sax import make_parser
> > from xml.sax.handler import ContentHandler
> > import StringIO
> >
> > class ErrorHandler:
> >     def __init__(self, parser):
> >         self.parser = parser
> >     def warning(self, msg):
> >         print '*** (ErrorHandler.warning) msg:', msg
> >     def error(self, msg):
> >         print '*** (ErrorHandler.error) msg:', msg
> >     def fatalError(self, msg):
> >         print msg
> >
> > class ContentHandler(ContentHandler):
> >     def __init__ (self):
> >         pass
> >     def startElement(self, name, attrs):
> >         pass
> >     def characters (self, ch):
> >         pass
> >     def endElement(self, name):
> >         pass
> >
> > xmlstr = """
> > <cities>
> >   <city>
> >     <name>Tampa</name>
> >     <description>A great city  and place to live</description>
> >   </city>
> >   <city>
> >     <name>Clearwater</name>
> >     <description>Beautiful beaches</description>
> >   </city>
> > </cities>
> > """
> > parser = make_parser()
> > curHandler = ContentHandler()
> > errorHandler = ErrorHandler(parser)
> > parser.setContentHandler(curHandler)
> > parser.setErrorHandler(errorHandler)
> > parser.parse(StringIO.StringIO(xmlstr))
> > 
> > -- 
> > http://mail.python.org/mailman/listinfo/python-list



From __peter__ at web.de  Sun Jan  7 04:21:22 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 07 Jan 2007 10:21:22 +0100
Subject: where is python on linux?
References: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
Message-ID: <enqe2h$f3k$03$1@news.t-online.com>

Frank Potter wrote:

> I installed fedora core 6 and it has python installed.
> But the question is, where is the executable python file?

Find out yourself with

$ which python

Peter


From jura.grozni at gmail.com  Sun Jan 28 17:56:05 2007
From: jura.grozni at gmail.com (azrael)
Date: 28 Jan 2007 14:56:05 -0800
Subject: Data structure and algorithms
Message-ID: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>

Hy, i am a student and in 2 days I am writing a test in data 
structures and algorithms. I've done my homework and understood all 
the implementations and structures. My profesor was so kind to allow 
us to use any programing language we want, and I'd like to use 
pythhon. At the first look it looked great, but we are not allowed to 
use the built in functions like append(), so i have to write my own.
 I tried it like this:

class Node:
  def __init__(self, cargo=None, next=None):
    self.cargo = cargo
    self.next  = next

  def __str__(self):
    return str(self.cargo)


then

>>> node1 = Node(1)
>>> node2 = Node(2)
>>> node3 = Node(3)

>>> node1.next = node2
>>> node2.next = node3

but this was not dinamicly enough for me (or my prof.) so i did the 
following:

>>> list=[]
>>> list.append(Node(1))
>>> list.append(Node(2))
>>> list[0].next=list[1]
>>> list.append(Node(3))
>>> list[1].next=list[2]



but deleting the list[1] willl automaticly make the list[2] become 
list[1] and list[0] will "point" new to list[1]= 3
For my prof i should be doing something like deleting movig the 
pointer from  pointing to list[1] to list[2]. If I would do this in C 
then the old list[1] would be lost, but not in python. If i just 
redirect the "pointer" then the old value is still there.

I think that my concept is wrong by using a list to create a list. Is 
it possible to manage the insertation of new object like in C by 
allocating new memory space.


any sugestions how to make the implementation more like in C. I never 
managed the syntax of C so I stoped when structs crossed my way. 
Please help. I dont want to learn C. And especialy not in 2 days.



From pkyoung at gmail.com  Wed Jan 24 03:19:32 2007
From: pkyoung at gmail.com (auditory)
Date: Wed, 24 Jan 2007 17:19:32 +0900
Subject: numpy or _numpy or Numeric?
In-Reply-To: <mailman.3062.1169625439.32031.python-list@python.org>
References: <ep71iq$26m$1@news.kreonet.re.kr>
	<mailman.3062.1169625439.32031.python-list@python.org>
Message-ID: <ep74qh$3td$1@news.kreonet.re.kr>

Travis E. Oliphant ? ?:
> auditory wrote:
>> I am a newbie here
>>
>> I am trying to read "space separated floating point data" from file
>>
>> I read about csv module by searching this group,
>> but I couldn't read space separated values with csv.
>> (which may be matter of course..)
>>
>> I also read about numpy.fromfile(file, sep=' ') which i can use.
>> but on my machine(ubuntu linux) numpy is unknown module,
>> which I didn't install by myself.
> 
> You will need to install NumPy.
> 
>>
>> While trying to install numpy accroding to its homepage.
>> (http://numpy.scipy.org/numpydoc/numdoc.htm).
>> i am quite confused.
> 
> You are reading old documentation for Numeric and so any installation 
> description is how to install the Numeric module (not its newer 
> replacement which is called NumPy).
> 
> 
> So:
> 
> 1) Yes, you need NumPy
> 2) This *is different* from Numeric
> 3) You get it by either installing a pre-built package for your system 
> or by
> 
>    a) downloading the source tar-file from 
> http://sourceforge.net/project/showfiles.php?group_id=1369&package_id=175103 
> 
>      (get the numpy-<version>.tar.gz file
>    b) tar zxvf numpy-<version>.tar.gz
>    c) cd numpy-<version>
>    d) sudo python setup.py install
> 
>    e) If you want to link against high-performance libraries on your 
> system, then either put them in standard locations or edit the site.cfg 
> file appropriately (Optional).
> 
>>
>> 4. Or what is general way to read 'space separated values' from file?
> 
> You can easily read space-separated values from a file by reading in a 
> line at a time and using the split method of strings:
> 
> fid = open('filename')
> linedata = fid.readlines()
> new = [[float(x) for x in line.split()] for line in linedata]
> 
> new will be a nested sequence of floats.  You can convert it to an array 
> (if you want to do math on it) using
> 
> anew = numpy.array(new)
> 
> -Travis
> 
Thank you for quick answer..

I found the above website from googling with "numpy" keyword,
and supprised at that the top matching page is old one.

In addition to your method and below one,
I found csv moudule can do this with "delimiter" paramter.
I made mistake not to read manual first.
My apology on that.


From danb_83 at yahoo.com  Mon Jan 29 00:43:12 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 28 Jan 2007 21:43:12 -0800
Subject: import from future
In-Reply-To: <1169969100.946843.111770@p10g2000cwp.googlegroups.com>
References: <1169969100.946843.111770@p10g2000cwp.googlegroups.com>
Message-ID: <1170049392.204148.54430@a34g2000cwb.googlegroups.com>

On Jan 28, 1:25 am, "lee" <libi... at gmail.com> wrote:
> what are the things that we can do with import from future usage.....i
> heard its very interesting......thanks

Now that nested_scopes and generators are no longer optional, the only 
thing left is "from __future__ import division", which makes the "/" 
operator on integers give the same result as for floats.



From vmalloc at gmail.com  Thu Jan 25 04:31:26 2007
From: vmalloc at gmail.com (Rotem)
Date: 25 Jan 2007 01:31:26 -0800
Subject: pdb in python2.5
Message-ID: <1169717486.230356.79730@l53g2000cwa.googlegroups.com>

Hi,

Maybe I'm repeating a previous post (please correct me if I am).

I've tried the following code in python 2.5 (r25:51908, Oct  6 2006,
15:22:41)
example:

from __future__ import with_statement
import threading

def f():
    l = threading.Lock()
    with l:
        print "hello"
        raise Exception("error")
        print "world"

try:
    f()
except:
   import pdb
   pdb.pm()

This fails because pdb.pm() attempts to access sys.last_traceback which
is not assigned.
Trying:
pdb.post_mortem(sys.exc_traceback)

Yields the following:
> test.py(9)f()
-> print "world"
(Pdb)

the 'w' command yields a similar output, which implies that the
exception was thrown from the wrong line.
the traceback module is better, yielding correct results (displays line
8 instead of 9).

Has anyone encountered this behavior? is pdb broken?
I get similar results for larger/more complex pieces of code.

Thanks in advance,

Rotem



From fredrik at pythonware.com  Thu Jan  4 13:57:22 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 04 Jan 2007 19:57:22 +0100
Subject: Set type?
In-Reply-To: <1167936480.882357.277320@v33g2000cwv.googlegroups.com>
References: <1167936480.882357.277320@v33g2000cwv.googlegroups.com>
Message-ID: <enjimh$pkt$1@sea.gmane.org>

_ wrote:

> How do you check to see if a variable is a set?  I would like to use
> 
> if type(var) is types.SetType:
>    blah
> 
> but that is not available in types module.  I am using 2.4

     # set or subclass of set
     if isinstance(var, set):
         ...

     # exact match
     if type(var) is set:
         ...

also see

     http://preview.tinyurl.com/yjnoc5

</F>



From paddy3118 at netscape.net  Wed Jan 31 02:35:29 2007
From: paddy3118 at netscape.net (Paddy)
Date: 30 Jan 2007 23:35:29 -0800
Subject: Conditional expressions - PEP 308
In-Reply-To: <mailman.3325.1170193923.32031.python-list@python.org>
References: <mailman.3325.1170193923.32031.python-list@python.org>
Message-ID: <1170228929.612844.153730@p10g2000cwp.googlegroups.com>

On Jan 30, 9:51 pm, "Colin J. Williams" <c... at sympatico.ca> wrote:
> It would be helpful if the rules of the game were spelled out more clearly.
>
> The conditional expression is defined as X if C else Y.
> We don't know the precedence of the "if" operator.  From the little test
> below, it seem to have a lower precedence than "or".
>
> Thus, it is desirable for the user to put the conditional expression in
> parentheses.
>
> Colin W.
>
> # condExpr.py
> # PEP 308 defines a conditional expression as X if C else Y
> # but we don't know exactly what X is supposed to be.
> # It doesn't seem to be spelled out in the syntax.
>
> def main():
>    names= ['abc', 'def', '_ghi', 'jkl', '_mno', 'pqrs']
>    res= ''
>    for w in names:
>         res= res + w if w[0] != '_' else ''
>         z= 1
>    print 'res1:', res
>
>    res= ''
>    for w in names:
>         res= res + (w if w[0] != '_' else '')
>         z= 1
>    print 'res2:', res
>
> if __name__ == '__main__':
>    main()
>
> Result:
> [Dbg]>>>
> res1: pqrs
> res2: abcdefjklpqrs

But to give them credit though, in Whats new in Python 2.5: PEP 308,
they do mention that as a matter of style you should parenthesise the
if-expression, and the example given consistes of just a simple
assignment of the if-expr to a name.
- Paddy.



From heikki at osafoundation.org  Fri Jan 12 20:06:47 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 12 Jan 2007 17:06:47 -0800
Subject: Wierd M2Crypto bug - phony "peer did not return certificate" error
In-Reply-To: <N3Gph.15737$Gw4.6586@newssvr23.news.prodigy.net>
References: <YK%oh.17173$sR.6972@newssvr29.news.prodigy.net>
	<ovWdnZTGuYL38jjYnZ2dnUVZ_rqdnZ2d@comcast.com>
	<1168543799.097737.127930@i56g2000hsf.googlegroups.com>
	<ZsednYtgeIfeVTvYnZ2dnUVZ_hydnZ2d@comcast.com>
	<CoFph.33142$Gr2.8155@newssvr21.news.prodigy.net>
	<N3Gph.15737$Gw4.6586@newssvr23.news.prodigy.net>
Message-ID: <ifWdndyBIoM3rTXYnZ2dnUVZ_oSdnZ2d@comcast.com>

John Nagle wrote:
> def connect(self, addr):
>     self.socket.connect(addr)
>     self.addr = addr
>     self.socket.settimeout(None) # Back to normal timeout (NEW)

I am not sure if this is always appropriate. In fact, doesn't this just
eliminate the timeout completely from this connection?

In your case you could achieve what you want by calling
connection_object.socket.settimeout(4.0) method just before calling
connect, without needing to edit M2Crypto itself.

setdefaulttimeout, socket.settimeout and socket.setblocking are pretty
confusing...

-- 
  Heikki Toivonen


From me at privacy.net  Sun Jan  7 20:55:19 2007
From: me at privacy.net (Dan Sommers)
Date: Sun, 07 Jan 2007 20:55:19 -0500
Subject: how to find the longst element list of lists
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
Message-ID: <m2mz4ul1tk.fsf@unique.fqdn>

On Sun, 07 Jan 2007 22:23:22 +0100,
"Michael M." <michael at mustun.ch> wrote:

> How to find the longst element list of lists?
> I think, there should be an easier way then this:

>   s1 = ["q", "e", "d"]
>   s2 = ["a", "b"]
>   s3 = ["a", "b", "c", "d"]

[ snip ]

One more thing to think about:  if your list of lists grows (i.e., if
you end up with thousands of lists instead of just three), then sorting
may not be the way to go.  Assuming that list_of_lists is your list of
lists, then something like this:

    longest_list, longest_length = list_of_lists[ 0 ], len( longest_list )
    for a_list in list_of_lists[ 1 : ]:
        a_length = len( a_list )
        if a_length > longest_length:
            longest_list, longest_length = a_list, a_length

will run faster than sorting the list just to pick off one element (O(n)
vs. O(n log n) for all of you Big-Oh notation fans out there; you know
who you are!).

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
"I wish people would die in alphabetical order." -- My wife, the genealogist


From S.Mientki-nospam at mailbox.kun.nl  Tue Jan  2 05:46:52 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Tue, 02 Jan 2007 11:46:52 +0100
Subject: Difference between __init__ (again) and nothing ...
Message-ID: <da749$459a380d$d443bb3a$16845@news.speedlinq.nl>

What's the difference between using __init__ and using nothing,
as the examples below.

<Python-1>
class cpu:
   PC = 4


<Python-2>
class cpu:
   def __init__:
     self.PC = 4

thanks,
Stef Mientki


From siqingdu at gmail.com  Mon Jan 29 18:19:05 2007
From: siqingdu at gmail.com (Siqing Du)
Date: Mon, 29 Jan 2007 18:19:05 -0500
Subject: select windows
Message-ID: <eplvcn$773$1@aioe.org>

Hi,

Is there is a way to write a program to select and switch between
windows? For instance, if I have three windows: Firefox, Thunderbird,
and emacs, can I run a program to bring up the desired windows, instead
of click on the  windows use mouse.

Thanks,

Du


From ivoras at fer.hr  Wed Jan  3 11:01:03 2007
From: ivoras at fer.hr (Ivan Voras)
Date: Wed, 03 Jan 2007 17:01:03 +0100
Subject: How do I add users using Python scripts on a Linux machine
In-Reply-To: <ene7el$l51$03$1@news.t-online.com>
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
	<ene0j1$6nk$03$1@news.t-online.com>
	<mailman.2210.1167755536.32031.python-list@python.org>
	<ene7el$l51$03$1@news.t-online.com>
Message-ID: <engjvv$okr$1@news1.carnet.hr>

Sebastian 'lunar' Wiesner wrote:
> Carsten Haese <carsten at uniqsys.com> typed

>> I don't think that that has anything to do with Linux or not. The
>> script is not the actual executable, hence its suid bit is irrelevant.
> 
> I don't think so. From what I know, the script is passed as executable
> to the kernel loader, which interprets the shebang and feeds the script
> through the correct interpreter. So the kernel loader sees the script
> itself as executable instead of the interpreter binary. I've heard of
> other Unix systems, which handle this differently (meaning that the
> SUID bit on scripts has an effect), but I may be wrong.

Yes, the kernel parses #! but the suid-ness is still controlled by the
target interpreter (i.e. python executable). At least BSD systems also
behave this way.


From duncan.booth at invalid.invalid  Wed Jan  3 06:09:00 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 3 Jan 2007 11:09:00 GMT
Subject: Synchronization methodology
References: <mailman.2231.1167803272.32031.python-list@python.org>
	<pan.2007.01.03.08.47.43.379539@gmx.net>
Message-ID: <Xns98AD716C4E7EFduncanbooth@127.0.0.1>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:

> You may want to make sure the lock will be released in case of an
> exception:
> 
> def foo(self):
>     self.lock.aquire()
>     try:
>         pass # code
>     finally:
>         self.lock.release()
> 

In Python 2.5 this can also be written more succintly using the with 
statement so foo becomes:

from __future__ import with_statement
...

    def foo(self):
        with self.lock:
            pass # insert your code here


or write a decorator.


From 12cc104 at gmail.com  Mon Jan  8 03:51:26 2007
From: 12cc104 at gmail.com (proctor)
Date: 8 Jan 2007 00:51:26 -0800
Subject: regex question
In-Reply-To: <45a20464$0$9644$4c368faf@roadrunner.com>
References: <1168232001.377605.236270@11g2000cwr.googlegroups.com>
	<45a1f0c6$0$18929$4c368faf@roadrunner.com>
	<1168243020.304940.212700@42g2000cwt.googlegroups.com>
	<45a20464$0$9644$4c368faf@roadrunner.com>
Message-ID: <1168246286.569315.46270@51g2000cwl.googlegroups.com>


Paul McGuire wrote:
> "proctor" <12cc104 at gmail.com> wrote in message
> news:1168243020.304940.212700 at 42g2000cwt.googlegroups.com...
> >
> >
> > it does work now...however, one more question:  when i type:
> >
> > rx_a = re.compile(r'a|b|c')
> > it works correctly!
> >
>
> Do you see the difference between:
>
> rx_a = re.compile(r'a|b|c')
>
> and
>
> rx_a = re.compile("r'a|b|c'")
>
> There is no difference in the variable datatype between "string" and "raw
> string".  Raw strings are just a notational helper when creating string
> literals that have lots of backslashes in them (as happens a lot with
> regexps).
>
> r'a|b|c'  is the same as 'a|b|c'
> r'\d' is the same as '\\d'
>
> There is no reason to "add raw strings" to your makeRE method, since you
> don't have a single backslash anywhere.  And even if there were a backslash
> in the 'w' argument, it is just a string - no need to treat it differently.
> 
> -- Paul

thanks paul.  this helps.

proctor.



From gagsl-py at yahoo.com.ar  Wed Jan 31 03:06:50 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 31 Jan 2007 05:06:50 -0300
Subject: Random passwords generation (Python vs Perl) =)
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<epl3la$10g0$1@ulysses.news.tiscali.de>
	<1170088693.768440.26580@h3g2000cwc.googlegroups.com>
	<1170090408.495646.85720@v33g2000cwv.googlegroups.com>
	<1170108446.671609.169400@j27g2000cwj.googlegroups.com>
	<1170216508.396176.187780@v33g2000cwv.googlegroups.com>
Message-ID: <op.tm0d5o0ksd1mbx@gabriel2.softlabbsas.com.ar>

En Wed, 31 Jan 2007 01:08:28 -0300, Hieu.D.Hoang at gmail.com  
<Hieu.D.Hoang at gmail.com> escribi?:

> raw_input can do the job of print
> while 1: raw_input(__import__('os').urandom(6).encode('base64'))
>
> And can anyone explain why this is so?
>>>> while 1: input(__import__('os').urandom(6).encode('base64'))
>     ^
> SyntaxError: unexpected EOF while parsing

input and raw_input are not the same, see the docs.

-- 
Gabriel Genellina



From http  Wed Jan  3 06:01:10 2007
From: http (Paul Rubin)
Date: 03 Jan 2007 03:01:10 -0800
Subject: Synchronization methodology
References: <mailman.2231.1167803272.32031.python-list@python.org>
Message-ID: <7x64boml1l.fsf@ruckus.brouhaha.com>

Chris Ashurst <chris at telestatic.net> writes:
> Hi, I'm coming in from a despised Java background, and I'm having some
> trouble wrapping my head around sharing an object between multiple
> instances of a single class (in simpler terms, I would say imagine a
> simple chat server that has to share a list of connected users to each
> instance of a connected user).

If you're doing this with threads, one common Pythonic style is
generally to have the threads communicate through queues (see docs for
the Queue module).  This is sort of a cheap version of the CSP
(communicating sequential processes) approach.  You might have a
service thread that takes care of those shared objects, reading
requests from a queue (untested):

   # All client threads write their requests to this queue, and
   # the service loop reads from it
   service_queue = Queue()

   # make one of these in each client thread
   class Request(Queue.Queue):
      def __call__(self, reply_queue, func, *args, **kwargs):
          service_queue.put((self, func, args, kwargs))
          return self.get()

   def service_loop():
     while True:
        client, func, args, kwargs = service_queue.get()
        client.put (func(*args, **kwargs))

   Threading.Thread(target=service_loop).start()

Then in your connected user thread you could say:

   # set up a reply queue for this user's thread
   request = Request()
   ...

   # add the user to the connected user list, with timestamp and remote IP
   status = request(user_list.append, self, time(), remote_ip=whatever)

The last line would drop a request on the service queue to perform the
function call

    user_list.append(time(), remote_ip=whatever)

The service queue thread would retrieve the request, call the
function, and pass the result back through the reply queue.  The idea
is you'd handle all operations on user_list in the service thread, so
access is completely serialized using the queues.  You can see that
you can easily construct any function call that then gets executed in
the other thread, without having to use a bunch of boilerplate at each
request.  You have to be a bit careful to not use long-running
requests that could block other threads from getting their requests
serviced.  Use additional threads if you need such requests.

You sometimes end up creating more threads than necessary this way but
you tend to not have many synchronization problems if you stick with
this style.


From george.sakkis at gmail.com  Sun Jan 21 18:29:27 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 21 Jan 2007 15:29:27 -0800
Subject: mmap caching
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>
	<45B3DD4D.3010009@v.loewis.de>
Message-ID: <1169422167.683707.264180@a75g2000cwd.googlegroups.com>

Martin v. L?wis wrote:

> George Sakkis schrieb:
> > I've been trying to track down a memory leak (which I initially
> > attributed erroneously to numpy) and it turns out to be caused by a
> > memory mapped file. It seems that mmap caches without limit the chunks
> > it reads, as the memory usage grows to several hundreds MBs according
> > to the Windows task manager before it dies with a MemoryError.
>
> You must be misinterpreting what you are seeing. It's the operating
> system that decides what part of a memory-mapped file are held in
> memory, and that is certainly not without limits.

Sure; what I meant was that that whatever the limit is, it's high
enough that a MemoryError is raised before the limit is reached.

> Notice that there are several values that can be called "memory
> usage" (such as the size of the committed address space, the working
> set size, etc); you don't mention which of these values grows several
> hundreds MB.

It's the one in the 'Processes' tab of the Windows task manager (XP
proffesional). By the way, I ran the same program on a box with more
physical memory and the mem. usage stops growing at around 430MB, by
which time the whole file is most likely cached. I'd be interested in
any suggestions other than "buy more RAM" :) (these are not my machines
anyway).

Thanks,
George



From skip at pobox.com  Tue Jan 23 21:19:11 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 23 Jan 2007 20:19:11 -0600
Subject: Python does not play well with others
In-Reply-To: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
Message-ID: <17846.49695.213309.406485@montanaro.dyndns.org>


    John> MySQLdb has version and platform compatibility problems.  

Got specific examples?  I've successfully used MySQLdb on Linux, Mac and
Solaris with no compatibility problems at all.

    John> Even basic sockets don't quite work right; the socket module
    John> encapsulates the timeout mechanism but doesn't get it right.

As has been reported here a number of times, this simply awaits someone with
the time and inclination to do the work.  If it itches you then scratch the
itch.

    John> In the Perl, Java, PHP, and C/C++ worlds, the equivalent functions
    John> just work.  That's because, in those worlds, either the
    John> development team for the language or the development team for the
    John> subsystem takes responsibility for making them work.  Only Python
    John> doesn't do that.

You seem to be expecting something for free from the volunteer development
team.  If these things are important enough you can always pay someone to do
the work and contribute it back to the community.  The work didn't happen
for free in any of the communities you mentioned.  Someone (Sun, AT&T,
whoever) paid for it in either time or money.

Skip


From nagle at animats.com  Thu Jan 25 11:35:13 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 25 Jan 2007 16:35:13 GMT
Subject: Do I need Python to run Blender correctly?
In-Reply-To: <tRZth.2027$pH3.140@newsfe12.phx>
References: <tRZth.2027$pH3.140@newsfe12.phx>
Message-ID: <5%4uh.75582$wP1.6882@newssvr14.news.prodigy.net>

AKA gray asphalt wrote:
> I downloaded Blender but there was no link for python. Am I on the right 
> track?

    Blender doesn't require Python, but if you have Python, you can
write plug-ins for Blender.   Get "The Blender Book"; otherwise
you'll never figure Blender out.

					John Nagle


From huayang.xia at gmail.com  Thu Jan 18 13:11:06 2007
From: huayang.xia at gmail.com (Huayang Xia)
Date: 18 Jan 2007 10:11:06 -0800
Subject: Memory Management in Embedded Python
Message-ID: <1169143866.351663.316890@l53g2000cwa.googlegroups.com>

Hi there,

I have a piece of code like this:

      void funct(PyObject* pyobj)
      {
         char   str[128];
         strncpy(str, "just a test string", sizeof(str));
         PyObject* pydata = PyObject_CallMethod(pyobj, "method_x",
"s", str);
         Py_DECREF(pydata);
      }

After the function is exited, the str is not there anymore. Will this
affect python operation. How does python use the str? It's copied or it
just uses the pointer?

Thanks in advance.



From van.lindberg at gmail.com  Thu Jan 11 18:48:09 2007
From: van.lindberg at gmail.com (VanL)
Date: Thu, 11 Jan 2007 17:48:09 -0600
Subject: Intellectual Property Talk at PyCon
In-Reply-To: <eo6h51$nmr$1@sea.gmane.org>
References: <eo6df3$9li$1@sea.gmane.org> <eo6h51$nmr$1@sea.gmane.org>
Message-ID: <eo6ibq$rdf$1@sea.gmane.org>


Robert Kern wrote:

> I don't have any suggestions for other material to cover, but I'd like to
> express my interest in keeping this in your agenda. This is an issue that crops
> up again and again with ill-informed opinions all around.

Thanks for the feedback.  +1 for discussing GPL incorporation.


> Of course, it would be nice if what you say agrees with my opinions on the
> subject, but I'll let you slide if you at least say something sensible.  ;-)

I will try :)

Van




From wescpy at gmail.com  Sun Jan 14 22:16:53 2007
From: wescpy at gmail.com (wesley chun)
Date: 14 Jan 2007 19:16:53 -0800
Subject: Learning Python book, new edition?
References: <mailman.2580.1168528978.32031.python-list@python.org>
	<1168547177.121582.320840@k58g2000hse.googlegroups.com>
Message-ID: <1168831013.218729.243020@l53g2000cwa.googlegroups.com>

Robert Hicks wrote:
> I would get "Core Python Programming" by Wesley Chun. It covers just
> about everything under the sun and includes version 2.5.


Robert, thanks for the plug.  if the OP wants to learn more about my
book and its philosophy, feel free to check out my comments on the
Amazon product page and/or the book's website at http://corepython.com
to see if it's right for you.

more on topic, here's a summary of Python books which are rev'd up to
2.5, categorized but not in any particular order:

Python learning:
- Python for Dummies, Maruch, Sep 2006
- Core Python Programming, Chun, Sep 2006

Python pure reference:
- Python Essential Reference, Beazley, Feb 2006
- Python in a Nutshell, Martelli, Jul 2006

Python case study reference:
- Programming Python, Lutz, Aug 2006

Enjoy!
-wesley

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com



From dickinsm at gmail.com  Mon Jan 15 11:35:37 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: 15 Jan 2007 08:35:37 -0800
Subject: Conflicting needs for __init__ method
In-Reply-To: <pan.2007.01.15.03.43.54.630644@REMOVEME.cybersource.com.au>
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
	<pan.2007.01.15.03.43.54.630644@REMOVEME.cybersource.com.au>
Message-ID: <1168878934.345455.209810@m58g2000cwm.googlegroups.com>



On Jan 14, 10:43 pm, Steven D'Aprano
<s... at REMOVEME.cybersource.com.au> wrote:
> On Sun, 14 Jan 2007 15:32:35 -0800, dickinsm wrote:
> > (You could include the normalization in __init__, but that's wasteful
> Is it really? Have you measured it or are you guessing? Is it more or less
> wasteful than any other solution?

Just guessing :).  But when summing the reciprocals of the first 2000
positive integers, for example, with:

sum((Rational(1, n) for n in range(1, 2001)), Rational(0))

the profile module tells me that the whole calculation takes 8.537
seconds, 8.142 of which are spent in my gcd() function.  So it seemed
sensible to eliminate unnecessary calls to gcd() when there's an easy
way to do so.

>     def __copy__(self):
>         cls = self.__class__
>         obj = cls.__new__(cls)
>         obj.numerator = self.numerator
>         obj.denominator = self.denominator
>         return obj

Thank you for this.

Mark



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Jan 26 10:20:39 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 26 Jan 2007 16:20:39 +0100
Subject: Thoughts on using isinstance
In-Reply-To: <sgv*iYJBr@news.chiark.greenend.org.uk>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<1169656371.689791.216360@v33g2000cwv.googlegroups.com>
	<zHg*rKEBr@news.chiark.greenend.org.uk>
	<45b7b73b$0$391$426a74cc@news.free.fr>
	<sgv*iYJBr@news.chiark.greenend.org.uk>
Message-ID: <45ba1c39$1$2308$426a74cc@news.free.fr>

Matthew Woodcraft a ?crit :
> Bruno Desthuilliers  <bdesth.quelquechose at free.quelquepart.fr> wrote:
>> Matthew Woodcraft a ?crit :
> 
>>> Adding the validation code can make your code more readable, in that
>>> it can be clearer to the readers what kind of values are being
>>> handled.
> 
>> This is better expressed in the docstring. And if it's in the
>> docstring, you can't be blamed for misuse.
> 
> I certainly agree that the description of the function's requirements on
> its parameters is best placed in the docstring.
> 
> This is another place where the "don't validate, just try running the
> code anyway" approach can cause problems: what should you put in the
> docstring?
> 
> I don't think anyone would like to be fully explicit about the
> requirements: you'd end up having to write things like "A string, or at
> least anything that's iterable and hashable and whose elements are
> single character strings, or at least objects which have an upper()
> method which ...".
> 
> So in practice you end up writing "a string", and leave the rest of the
> 'contract' implicit. 

Python's doc (and third-part modules too) are full of 'string-like', 
'dict-like', 'file-like' etc...

> But that can lead to difficulties if people working
> on the code have different ideas of what that implicit contract is -- is
> it "a string, or anything else which works with the current
> implementation", or perhaps "you may pass something other than a string
> so long as you take responsibility for making it support all the
> necessary operations, even if the implementation changes", or is there
> some project-wide convention about how much like a string such things
> have to be?
 >
> I think this kind of vagueness can work well within a lump of code which
> is maintained as a piece, but it's good to divide up programs into
> components with more carefully documented interfaces. And it's at that
> level that I think doing explicit parameter validation can be helpful.

I'm afraid your strong ADA background shows up here... When I started 
using Python some 7 years ago, I strongly believed in strong static 
typing, and spent monthes fighting against the language.

>>> If you validate, you can raise an exception from the start of your
>>> function with a fairly explicit message.

And ?

>>> If you don't validate,
>>> you're likely to end up with an exception whose message is something
>>> like 'iteration over non-sequence',

Which is quite explicit

>>> and it might be raised from some
>>> function nested several levels deeper in.

And what's the problem ? You have a full traceback, and since you know 
which code is yours and which is not, it's usually quite easy to spot 
where you passed something wrong.

>> And what is the stack backtrace for, actually ?
> 
> I'm not sure that you intended that as a serious question,

Deadly serious.

> but I'll
> answer it anyway.
> 
> In an ideal world, the stack backtrace is there to help me work with
> code that I'm maintaining. It isn't there to help me grub around in the
> source of someone else's code which is giving me an unhelpful error
> message. Just as, in an ideal world, I should be able to determine how
> to correctly use someone else's code by reading its documentation rather
> than its source.

The backtrace is here to help understanding what went wrong, and it's 
usually quite good at it. And remember that Python has an interactive 
interpreter that let you try out how a module works - which is usually 
enough.

> I think this is a 'quality of implementation' issue. When you start
> using Python you pretty rapidly pick up the idea that a message like
> 'len() of unsized object' from (say) a standard library function
> probably just means that you didn't pass the value you intended to; but
> that doesn't mean it's a good error message. These things do add up to
> make the daily business of programming less efficient.

Strange enough, we see quite a few experimented C/C++/Java programmers 
explaining how much Python (or Ruby FWIW) improved their productivity...

> 
>>> The latter can be harder for the user of your function to debug (in
>>> particular, it may not be easy to see that the problem was an invalid
>>> parameter to your function rather than a bug in your function itself,
>>> or corrupt data elsewhere in the system).
> 
>> docstrings and unit-tests should make it clear.
> 
> I don't see that either of those things remove the issues I described.
> 
> 
>> Now if one want to have to declare everything three times and write
>> layers and layers of adapters and wrappers, well, he knows where to
>> find Java !-)
> 
> Right. But using Python there is a position between 'writing layers and
> layers of adapters and wrappers' and 'never validate anything': put
> explicit checks in particular functions where they're likely to do most
> good.

Did I say otherwise ? Now the question is "where will explicit checks do 
most good ?" !-)

> For example, it's often helpful to explicitly validate if you're going

... to use data coming from the outside world.

> 
>>> This might well lead to your program apparently completing
>>> successfully but giving the wrong result (which is usually the kind
>>> of error you most want to avoid).
> 
>> Compared to what C or C++ can do to your system, this is still a
>> pretty minor bug - and probably one of the most likely to be detected
>> very early
> 
> I disagree. What C or C++ will do, very often, is produce a segmentation
> fault.

If that's all you get, then lucky you. What's funny with UBs is that 
they are, well, undefined !-)

> That may well turn out to be hard to debug, but it's considerably
> more likely to be detected early than a successful exit status with
> incorrect output.

Don't you test your programs ?



From Thomas.Ploch at gmx.net  Fri Jan  5 16:17:53 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Fri, 05 Jan 2007 22:17:53 +0100
Subject: PyGreSQL Install
In-Reply-To: <1168030553.913612.309020@q40g2000cwq.googlegroups.com>
References: <1168030553.913612.309020@q40g2000cwq.googlegroups.com>
Message-ID: <459EC081.5060007@gmx.net>

goodepic schrieb:
> I successfully installed postgresql and pygresql from source on my
> MacBook 2ghz Intel core duo running os x 10.4.8.  However, pygresql
> installed under the defualt python 2.3 installation, while I've been
> upgrading and working in 2.5, and have invested too much time to go
> back to 2.3.  I definitely don't know where every file is, but I know
> that the site-packages folder where I need pgdb to be is
> /Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages.
>  This is where I have pypar, pynum, numeric, etc.  PyGreSQL installed
> in the default
> /System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages.
> 
> 
> Anyone know where I can edit setup.py or what flags I can use to force
> the install onto 2.5?
> 
> Thanks!
> 

You should try:

$ python2.5 setup.py install

Normally it gets installed into the directory of the python version you
use when running setup.py. Is python 2.3 still the default on MAC OS X
10.4? I thought they switched to python 2.4.

Thomas


From kylotan at gmail.com  Thu Jan 25 06:01:15 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 25 Jan 2007 03:01:15 -0800
Subject: Python does not play well with others
In-Reply-To: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
Message-ID: <1169722875.237123.98680@v45g2000cwv.googlegroups.com>

On Jan 24, 1:50 am, John Nagle <n... at animats.com> wrote:
> In the Perl, Java, PHP, and C/C++ worlds, the equivalent
> functions just work.   That's because, in those worlds, either the
> development team for the language or the development team
> for the subsystem takes responsibility for making them work.
> Only Python doesn't do that.

I have much sympathy for your position. I think the problem is that
Python is quite capable in many areas, such that the people in the
community with the expertise to extend the language and libraries, are
usually the ones who've been happily using the polished features for
years and have found they need nothing more. And the ones who need
those features probably got bored of waiting for progress long ago. You
get the responses you do from years of natural selection in the
community. I think that is why many of the SIGs are stagnant, why the
standard library has so much fluff yet still lacks in key areas such as
multimedia and web development, etc.

People can say, "if you want it done, why aren't you doing it?", and is
a fair question, but it doesn't alter the fact of Python's deficiencies
in certain areas when compared with other languages.

-- 
Ben Sizer



From lrahuel.notgood at voila.fr  Wed Jan 31 10:42:02 2007
From: lrahuel.notgood at voila.fr (Laurent Rahuel)
Date: Wed, 31 Jan 2007 16:42:02 +0100
Subject: "Correct" db adapter
References: <1170253666.826691.276800@s48g2000cws.googlegroups.com>
Message-ID: <45c0b8cd$0$5072$ba4acef3@news.orange.fr>

Maybe you should take a look at sqlalchemy

king kikapu wrote:

> Hi to all,
> 
> i have started a month ago to seriously studying Python. I am now
> looking at the databases stuff
> and i want the opinion of more experienced Python programmers (than
> me) at the following :
> 
> I see that there are a lot of databases adapters on the net, some
> following the DB-API 2.0 and some others do not. I want to use a db-
> module that do not tie me down to a specific database and that fully
> supports DB-API 2.0
> Now i am using Sql Server but who knows about tomorrow.
> 
> I started using pyodbc and looking how i can e.x. call stored
> procedure with arguments and all that stuff.
> This is using ODBC syntac and i found enough info on the net.
> 
> Is the approach i took the "correct" one or is there a better db-
> module so i can use ?
> 
> Thanks in advance



From chizzua at gmail.com  Fri Jan  5 15:39:59 2007
From: chizzua at gmail.com (jbchua)
Date: 5 Jan 2007 12:39:59 -0800
Subject: Learning to program in Python
In-Reply-To: <1168029133.866590.43770@i15g2000cwa.googlegroups.com>
References: <1168028517.005902.172880@11g2000cwr.googlegroups.com>
	<1168029133.866590.43770@i15g2000cwa.googlegroups.com>
Message-ID: <1168029599.576718.74200@i15g2000cwa.googlegroups.com>

John Henry wrote:
> jbchua wrote:
> > Hello everybody.
> >
> > I am an Electrical Engineering major and have dabbled in several
> > languages such as Python, C, and Java in my spare time because of my
> > interest in programming. However, I have not done any practical
> > programming because I have no idea where to get started. I taught
> > myself these languages basically by e-tutorials and books. This makes
> > me feel as if I don't really know how to implement these languages.
> > Does anybody have any advice on where to start applying my limited
> > knowledge practically in order to advance my learning?
>
> Which area of EE are you in?  Or just starting on that as well?
>
> If you're just starting, chanllege yourself to build a R mesh and
> calculate the Thevenin equivalent looking out from a particular node.
> Then you can expand that to an RLC network.
>
> Besure to use Objects, think in terms of objects, and code in objects.
>  Don't hard code the data type.  You'll be able to see how magical the
> Duck Typing is in Python.
>
> Have fun.

I'm a freshman-- I have yet to take any actual EE classes. I am
actually thinking of maybe changing my focus towards Computer Science
or at least minoring in it.

To be perfectly honest, I have no idea what you just asked me to do ;\



From nick at craig-wood.com  Mon Jan 22 04:30:06 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 22 Jan 2007 03:30:06 -0600
Subject: mmap caching
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>
	<45B3DD4D.3010009@v.loewis.de>
	<1169422167.683707.264180@a75g2000cwd.googlegroups.com>
	<45B3FDA7.9030702@v.loewis.de>
Message-ID: <slrner8v4p.l0v.nick@irishsea.home.craig-wood.com>

Martin v. L?wis <martin at v.loewis.de> wrote:
>  In fact, memory that is read in because of mmap should *never* cause
>  a MemoryError. Python calls MapViewOfFile when mmap.mmap is invoked,
>  at which point the operating commits to providing that much address
>  space to the application, along with backing storage on disk
>  (typically, from the file being mapped, unless it is an anonymous
>  map). Later access to the mapped range cannot fail (except for
>  hardware errors), and if it would, you wouldn't see a MemoryError.

So presumably it is python generating a MemoryError.  It is asking for
a new bit of memory and it is failing so it throws a MemoryError.

Could memory allocation under windows be affected by a large chunk of
mmap()ed file which is physically swapped in at the time of the
allocation?

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


From deets at nospam.web.de  Sat Jan  6 19:41:44 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 07 Jan 2007 01:41:44 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
Message-ID: <50atuaF1bb2k9U1@mid.uni-berlin.de>

time.swift at gmail.com schrieb:
> Coming from a C++ / C# background, the lack of emphasis on private data
> seems weird to me. I've often found wrapping private data useful to
> prevent bugs and enforce error checking..
> 
> It appears to me (perhaps wrongly) that Python prefers to leave class
> data public.  What is the logic behind that choice?

Private data is a convention, not a strict enforcement, for both Java 
and C++.

Depending on your C++ compiler, a simple

#define private public

will give you access to all data you want. Besides the fact that casting 
to a void* pointer and just accessing the private parts isn't rocket 
science.

The same applies to java, for whatever reasons (I presume 
serialization), you can access private fields via reflection.

In python, private members are usually declared using a single or double 
underscore. And the basic idea is: "if you tamper with this, you've been 
warned". Which is the way coding between consenting adults should be.

To be honest: I've stumbled over more cases of unescessary hoops to jump 
through due to private declarations than bugs caused of me exploiting 
things I've been told by the compiler not to tamper with it.

Summary: not important, forget about it, enjoy python!

Diez


From nszabolcs at gmail.com  Mon Jan 29 11:38:13 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 29 Jan 2007 08:38:13 -0800
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <epl3la$10g0$1@ulysses.news.tiscali.de>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<epl3la$10g0$1@ulysses.news.tiscali.de>
Message-ID: <1170088693.768440.26580@h3g2000cwc.googlegroups.com>

> If you really want a hack, here it is:
>
> while 1:print
> ''.join(__import__('random').choice(__import__('string').letters+'1234567890')
> for x in xrange(8)),;n=raw_input()
>
> This is a one-liner (though mail transmission may split it up), no
> import statements. If someone can come up with an even smaller version,
> feel free to post. :)

while 
1:i=__import__;print''.join(i('random').choice(i('string').letters
+'1234567890')for x in range(8)),;raw_input()

same but shorter:
i = __import__;
xrange -> range (why use xrange? range is faster and simpler for small 
ranges)
n =(not needed)



From osv at javad.com  Thu Jan 11 07:54:53 2007
From: osv at javad.com (Sergei Organov)
Date: Thu, 11 Jan 2007 15:54:53 +0300
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<1168452879.866265.36880@i39g2000hsf.googlegroups.com>
	<eo3bgm$c98$1@gemini.csx.cam.ac.uk>
	<mailman.2544.1168455985.32031.python-list@python.org>
	<eo3eqs$icv$1@gemini.csx.cam.ac.uk> <mailman.2569.1168510933.32031.py
	<eo5410$19v$1@gemini.csx.cam.ac.uk>
Message-ID: <eo5c2t$su9$1@sea.gmane.org>

nmm1 at cus.cam.ac.uk (Nick Maclaren) writes:
[...]
> I mean precisely the first.
>
> The C99 standard uses a bizarre consistency model, which requires serial
> execution, and its consistency is defined in terms of only volatile
> objects and external I/O.  Any form of memory access, signalling or
> whatever is outside that, and is undefined behaviour.
>
> POSIX uses a different but equally bizarre one, based on some function
> calls being "thread-safe" and others forcing "consistency" (which is
> not actually defined, and there are many possible, incompatible,
> interpretations).  It leaves all language aspects (including allowed
> code movement) to C.
>
> There are no concepts in common between C's and POSIX's consistency
> specifications (even when they are precise enough to use), and so no
> way of mapping the two standards together.

Ah, now I see what you mean. Even though I only partly agree with what
you've said above, I'll stop arguing as it gets too off-topic for this
group.

Thank you for explanations.

-- Sergei.



From jstroud at mbi.ucla.edu  Sun Jan 28 19:36:27 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 28 Jan 2007 16:36:27 -0800
Subject: Function to create Tkinter PhotoImages from directory?
In-Reply-To: <b3a5d$45bd39e8$4275d90a$1567@FUSE.NET>
References: <b3a5d$45bd39e8$4275d90a$1567@FUSE.NET>
Message-ID: <epjfib$o01$1@daisy.noc.ucla.edu>

Kevin Walzer wrote:
> I am trying to create a number of Tk PhotoImages from a single
> directory. Currently I am hard-coding file names and image names, like so:
> 
>  def makeImages(self):
>         self.imagedir = (os.getcwd() + '/images/')
>         self.folder_new=PhotoImage(file=self.imagedir + 'folder_new.gif')
>         self.save=PhotoImage(file = self.imagedir + 'save.gif')
>         self.folder=PhotoImage(file=self.imagedir + 'folder.gif')
>         self.help=PhotoImage(file=self.imagedir + 'help.gif')
>         self.fontsmall=PhotoImage(file=self.imagedir + 'fontsmall.gif')
>         self.stop=PhotoImage(file=self.imagedir + 'stop.gif')
> 
> What I'd like to do is glob the directory and create images with the
> same name as the gif file, but I can't figure out how to get that to
> work. Can anyone help?
> 

This is platform independent (and untested):

import glob
import os

def makeImages(self):
   import glob
   import os
   self.imagedir = os.path.join(os.getcwd(), 'images')
   pattern = os.path.join(self.imagedir, '*.gif')
   image_names = glob.glob(pattern)
   for name in image_names:
     base = os.path.basename(name).split('.')[0]
     pathname = os.path.join(self.imagedir, n)
     self.setattr(base, Photoimage(file=pathname))

James


From pythonnews at nospam.jmbc.fr  Tue Jan 30 16:47:29 2007
From: pythonnews at nospam.jmbc.fr (jean-michel bain-cornu)
Date: Tue, 30 Jan 2007 22:47:29 +0100
Subject: DCOP memory leak?
In-Reply-To: <1170193025.867274.242350@m58g2000cwm.googlegroups.com>
References: <1170193025.867274.242350@m58g2000cwm.googlegroups.com>
Message-ID: <45bfbd10$0$21143$7a628cd7@news.club-internet.fr>

> Now, I have to call DCOP very often and I noticed that every time I 
> make a DCOP call my program keeps growing in memory size.
> 
> To make sure it was DCOP i wrote the small program below:
> 
> from dcopext import DCOPClient, DCOPApp
> 
> while 0==0:
>     dcop=DCOPClient()
>     dcop.attach()
>     AmarokDcopRes = DCOPApp ("amarok", dcop)
>     ok, Ms = AmarokDcopRes.player.trackCurrentTimeMs()
>     print Ms
> 
> If you run this script and monitor it's memory use you'll see that it 
> keeps growing.

It's probably silly, but what's about 'del dcop' as the last line of 
your loop ?


From goodepic at gmail.com  Thu Jan  4 16:35:14 2007
From: goodepic at gmail.com (goodepic)
Date: 4 Jan 2007 13:35:14 -0800
Subject: Problem Running Working Code on Mac
Message-ID: <1167946511.531632.41750@11g2000cwr.googlegroups.com>

I'm newish to python and just got my first mac, so sorry if this is
stupid.  I have a little app developed by someone else in wxGlade that
implements a complex stats package and language package, all in python.
 It works fine on my work PC, but not on my laptop.  I have a new
macbook 2ghz core duo, running os x 10.4.8 with python 2.5 installed (I
didn't erase the base 2.3, just put /usr/local/bin at the start of
$PATH), along with the latest wxPython, can't remember the version
number.  I need to add a few more components from the stats package,
and I'd like eventually to pretty up the cheap GUI I was given, but
that'd be icing.  When I try either python <filename> or pythonw
<filename>, I get this error:

WARNING:root:Could not import module "PyPar", defining sequential
interface
WARNING:root:No MySQLdb module available
WARNING:root:No pgdb module (PostgreSQL) available
Traceback (most recent call last):
  File "febrlgui.py", line 513, in <module>
    frame_1 = MyFrame(None, -1, "")
  File "febrlgui.py", line 198, in __init__
    self.__set_properties()
  File "febrlgui.py", line 355, in __set_properties
    self.a_box1.SetSelection(-1)
  File
"//Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_core.py",
line 11487, in SetSelection
    return _core_.ItemContainer_SetSelection(*args, **kwargs)
wx._core.PyAssertionError: C++ assertion "IsValid(n)" failed at
/BUILD/wxPython-src-2.8.0.1/src/mac/carbon/choice.cpp(242) in
GetString(): wxChoice::GetString(): invalid index

Of course I'm traveling soon and need to be able to work on this on my
macbook, so it's down to panic time.  Any help is GREATLY appreciated.

Thanks,
Matt



From bruno.desthuilliers at websiteburo.com  Thu Jan 25 05:07:59 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Thu, 25 Jan 2007 11:07:59 +0100
Subject: Static variables
In-Reply-To: <1169687035.433771.177900@v45g2000cwv.googlegroups.com>
References: <ep8gkl$g7v$3@news.in.tum.de>
	<fVPth.1713$G23.1170@newsreading01.news.tds.net>
	<45b7cfd4$0$16160$426a74cc@news.free.fr>
	<1169687035.433771.177900@v45g2000cwv.googlegroups.com>
Message-ID: <45b8817f$0$16154$426a74cc@news.free.fr>

bearophileHUGS at lycos.com a ?crit :
> Bruno Desthuilliers:
>> And this let you share state between functions:
>>
>> def make_counter(start_at=0, step=1):
>>    count = [start_at]
>>    def inc():
>>      count[0] += step
>>      return count[0]
>>    def reset():
>>      count[0] = [start_at]
>>      return count[0]
>>    def peek():
>>      return count[0]
>>
>>    return inc, reset, peek
>>
>> foo, bar, baaz = make_counter(42, -1)
>> print baaz()
>> for x in range(5):
>>     print foo()
>> print bar()
>> print baaz()
> 
> An interesting solution, I have never created such grouped clorures. 

It's a common idiom in some functional languages.

> I
> don't know if this solution is better than a class with some class
> attributes plus some class methods...

It's somewhat equivalent, but in Python, I'd surely use a class instead !-)


From py at th.on  Tue Jan 23 18:48:59 2007
From: py at th.on (py)
Date: Tue, 23 Jan 2007 23:48:59 GMT
Subject: smtplib starttls gmail example
Message-ID: <L9xth.1926$dN2.607@trnddc07>

Hi, Jean Paul.

I read your code with interest. I wonder, does twisted also raise the socket error or does it know
about this apparently well-known and often ignored incompatibility between the standard and
the implementations?

Something else has occurred to me. After starting tls, all the xmitted commands and data are encrypted before they leave the client machine.
so obviously they have to be decrypted by the server's socket lib before the smtp daemon can do what it's supposed to do.
but i wonder if the encryption of the trailing \n.\n has something to do with the socket error, given that
the error msg says something about premature EOF.

-dave


From martin at v.loewis.de  Thu Jan  4 12:08:27 2007
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 04 Jan 2007 18:08:27 +0100
Subject: Best way to implement a timed queue?
In-Reply-To: <mailman.2284.1167921061.32031.python-list@python.org>
References: <mailman.2284.1167921061.32031.python-list@python.org>
Message-ID: <459d348b$0$28356$9b622d9e@news.freenet.de>

Thomas Ploch schrieb:
> I am having troubles with implementing a timed queue. I am using the
> 'Queue' module to manage several queues. But I want a timed access, i.e.
> only 2 fetches per second max. I am horribly stuck on even how I
> actually could write it. Has somebody done that before? And when yes,
> how is the best way to implement it?

You could put a wrapper around the queue which synchronizes the get
operations, and then delays access until 1s after the last-but-one
access.

The following code is untested:

import threading, time

class ThrottledQueue(threading.Queue):
  def __init__(self):
    threading.Queue.__init__(self)
    self.old = self.older = 0
    self.get_lock = threading.Lock()

  def get(self):
    with self.get_lock:  # synchronize get
      # check whether the next get should be in the future
      now = time.time()
      next = self.older + 1
      if now < next: time.sleep(next-now)
      # really fetch one item; this may block
      result = threading.Queue.get(self)
      self.older = self.old
      # set the last get time to the time when the get completed,
      # not when it started
      self.old = time.time()
    return result

HTH,
Martin


From oyekomova at hotmail.com  Sat Jan 13 19:39:34 2007
From: oyekomova at hotmail.com (oyekomova)
Date: 13 Jan 2007 16:39:34 -0800
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
In-Reply-To: <1168728465.178605.218850@q2g2000cwa.googlegroups.com>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
	<eo78ah$dqc$1@sea.gmane.org>
	<mailman.2633.1168583356.32031.python-list@python.org>
	<1168715634.695961.14710@l53g2000cwa.googlegroups.com>
	<1168728465.178605.218850@q2g2000cwa.googlegroups.com>
Message-ID: <1168735174.140171.74930@v45g2000cwv.googlegroups.com>

Thanks for your note. I have 1Gig of RAM. Also, Matlab has no problem
in reading the file into memory. I am just running Istvan's code that
was posted earlier.

import time, csv, random
from numpy import array


def make_data(rows=1E6, cols=6):
    fp = open('data.txt', 'wt')
    counter = range(cols)
    for row in xrange( int(rows) ):
        vals = map(str, [ random.random() for x in counter ] )
        fp.write( '%s\n' % ','.join( vals ) )
    fp.close()


def read_test():
    start  = time.clock()
    reader = csv.reader( file('data.txt') )
    data   = [ map(float, row) for row in reader ]
    data   = array(data, dtype = float)
    print 'Data size', len(data)
    print 'Elapsed', time.clock() - start


#make_data()
read_test()



On Jan 13, 5:47 pm, "sturlamolden" <sturlamol... at yahoo.no> wrote:
> oyekomova wrote:
> > Thanks to everyone for their excellent suggestions. I was able to
> > acheive the following results with all your suggestions. However, I am
> > unable to cross file size of 6 million rows. I would appreciate any
> > helpful suggestions on avoiding memory errors. None of the solutions
> > posted was able to cross this limit.The error message means you are running out of RAM.
>
> With 6 million rows and 6 columns, the size of the data array is (only)
> 274 MiB. I have no problem allocating it on my laptop. How large is the
> csv file and how much RAM do you have?
>
> Also it helps to post the whole code you are trying to run. I don't
> care much for guesswork.



From david at boddie.org.uk  Thu Jan 18 10:59:07 2007
From: david at boddie.org.uk (David Boddie)
Date: 18 Jan 2007 07:59:07 -0800
Subject: The proper use of QSignalMapper
References: <1169045073.138626.60770@l53g2000cwa.googlegroups.com>
	<1169049100.393777.269350@v45g2000cwv.googlegroups.com>
	<1169085859.586698.149400@51g2000cwl.googlegroups.com>
Message-ID: <1169135947.039984.108930@51g2000cwl.googlegroups.com>

borntonetwork wrote:
> Thanks, David, for you help.
>
> When I change the slot function to what you show in your second
> example, I get the same results: nothing.

This may be due to something I missed in your code. When you
connect the signal from the signal mapper to your class, you
need to specify the signal as a C++ signature as well:

        self.connect(self.signalMapper, QtCore.SIGNAL(
             "mapped(int)"),
             self.deleteProductIngredient)

The second example should now work.

Looking at the first example, which uses SLOT() rather than specifying
a Python method, the following might be due to the way you call
connect, though it is surprising:

> When I change it to what you
> have in your first example, I get the following:
>
> Object::connect: No such slot QApplication::map()
> Object::connect:  (sender name:   'chkProductIngredientsDelete_1')
> Object::connect:  (receiver name: 'main.py')

[...]

It looks like you should try something like this:

             self.connect(w, QtCore.SIGNAL("stateChanged(int)"),
                  self.signalMapper,
                  QtCore.SLOT("map()"))

I can't understand why calling self.app.connect() would cause the
connection to be attempted between self.signalMapper and self.app.

Maybe someone on the PyQt/PyKDE mailing list would be able to
explain the behaviour you're seeing:

  http://mats.imk.fraunhofer.de/mailman/listinfo/pykde

David



From tjreedy at udel.edu  Tue Jan 23 19:46:46 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 23 Jan 2007 19:46:46 -0500
Subject: free variables /cell objects question
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com><Xns98C17C03B6297duncanbooth@127.0.0.1>
	<1169563580.634000.122540@v45g2000cwv.googlegroups.com>
Message-ID: <ep6a9m$knb$1@sea.gmane.org>


"gangesmaster" <tomerfiliba at gmail.com> wrote in message 
news:1169563580.634000.122540 at v45g2000cwv.googlegroups.com...
| so this is why [lambda: i for i in range(10)] will always return 9.

No, it returns a list of 10 identical functions which each return the 
current (when executed) global (module) variable i. Except for names, 
'lambda:i' abbreviates 'def f(): return i'.

>>> a=[lambda: i for i in range(10)]
>>> i=42
>>> for j in range(10): print a[j]()

42
42
42
42
42
42
42
42
42
42
>>> for i in range(10): print a[i]()

0
1
2
3
4
5
6
7
8
9
>>> del i
>>> for j in range(10): print a[j]()


Traceback (most recent call last):
  File "<pyshell#23>", line 1, in -toplevel-
    for j in range(10): print a[j]()
  File "<pyshell#8>", line 1, in <lambda>
    a=[lambda: i for i in range(10)]
NameError: global name 'i' is not defined

| imho that's a bug, not a feature.

The developers now think it a mistake to let the list comp variable 'leak' 
into the global scope.  It leads to the sort of confusion that you 
repeated.  In Py3, the leak will be plugged, so one will get an exception, 
as in the last example, unless i (or whatever) is defined outside the list 
comp.

Terry Jan Reedy





From __peter__ at web.de  Tue Jan  9 07:23:11 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 09 Jan 2007 13:23:11 +0100
Subject: how to find the longst element list of lists
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
	<m2mz4ul1tk.fsf@unique.fqdn>
	<pan.2007.01.08.10.29.29.887201@REMOVE.THIS.cybersource.com.au>
	<entf0l$fmo$00$1@news.t-online.com>
	<pan.2007.01.08.22.30.12.775492@REMOVE.THIS.cybersource.com.au>
Message-ID: <eo01fn$ame$03$1@news.t-online.com>

Steven D'Aprano wrote:

> On Mon, 08 Jan 2007 13:55:40 +0100, Peter Otten wrote:
> 
>>> The precise results depend on the version of Python you're running, the
>>> amount of memory you have, other processes running, and the details of
>>> what's in the list you are trying to sort. But as my test shows, sort
>>> has some overhead that makes it a trivial amount slower for sufficiently
>>> small lists, but for everything else you're highly unlikely to beat it.
>> 
>> Try again with tN.timeit(1) and a second list that is random.shuffle()d
>> and copied to L before each measurement. list.sort() treats already
>> sorted lists specially.
> 
> Or, simply shuffle the list itself. Why copy it?

To feed the same data to every algorithm. This is an act of fairness, though
with negligable impact on the benchmark results, I suspect :-)
 
> In my tests, sorting still wins, and by roughly the same factor.
 
> One optimization that might shift the balance would be to remove the
> list copying in the non-sort code (list_of_lists[1:]). That's going to be
> very time consuming for big lists.
 
With the tweak that you suggest above the loop wins for 100 items on my
machine...

         N       loop      iloop        max       sort
         1   0.000008   0.000019   0.000012   0.000010
        10   0.000008   0.000008   0.000009   0.000013
       100   0.000095   0.000037   0.000028   0.000088
      1000   0.000374   0.000341   0.001304   0.001204
      5000   0.001930   0.001719   0.001212   0.007062

if you can trust the timings for small values of N. 
The script to generate this table has become somewhat baroque :-)

import random
import timeit

timers = []
def bench(f):
    t = timeit.Timer("getlongest(L)", "from __main__ import %s as
getlongest, L, items; L[:] = items" % f.__name__)
    t.name = f.__name__.split("_")[-1]
    t.function = f
    timers.append(t)
    return f

@bench
def getlongest_loop(lists):
    longest_list = lists[0]
    longest_length = len(longest_list)
    for a_list in lists[1:]:
        a_length = len(a_list)
        if a_length > longest_length:
            longest_list, longest_length = a_list, a_length
    return longest_list

@bench
def getlongest_iloop(lists):
    lists = iter(lists)
    longest_list = lists.next()
    longest_length = len(longest_list)
    for a_list in lists:
        a_length = len(a_list)
        if a_length > longest_length:
            longest_list, longest_length = a_list, a_length
    return longest_list

@bench
def getlongest_max(lists):
    return max(lists, key=len)

@bench
def getlongest_sort(lists):
    lists.sort(key=len)
    return lists[-1]

def make_list_of_lists(length):
    lol = [[None]*i for i in xrange(length)]
    random.shuffle(lol)
    return lol

def measure(N):
    print "%10d" % N,
    for t in timers:
        print "%10.6f" % t.timeit(1),
    print

if __name__ == "__main__":
    import sys
    if "--test" in sys.argv:
        L = make_list_of_lists(100)
        expected = [None]*99
        for t in timers:
            assert t.function(L[:]) == expected
        raise SystemExit
    L = []
    print "N".rjust(10),
    print " ".join(t.name.rjust(10) for t in timers)
    for N in [1, 10, 100, 1000, 5000]:
        items = make_list_of_lists(N)
        measure(N)

Peter


From alec at mihailovs.com  Fri Jan  5 04:50:06 2007
From: alec at mihailovs.com (Alec Mihailovs)
Date: Fri, 05 Jan 2007 09:50:06 GMT
Subject: Memoization in Python
Message-ID: <ibpnh.230$TE4.85@news02.roc.ny>

Following Antti Karttunen suggestion, I wrote the following simple decorator 
for creating functions with cache (something like 'option remember' in 
Maple). Just wanted to share it:

def function_with_cache(f):
    def new_f(*args):
        if args in new_f.cache: return new_f.cache[args]
        result=f(*args)
        new_f.cache[args]=result
        return result
    new_f.cache={}
    new_f.func_name=f.func_name
    return new_f

For example,

@function_with_cache
def A000045(n):
    if n<2: return n
    return A000045(n-1)+A000045(n-2)

A000045(3)
2

A000045.cache
{(2,): 1, (0,): 0, (3,): 2, (1,): 1}

Or, another example,

@function_with_cache
def binomial(m,n):
    if m <0 or n >m: return 0
    if n==0 or m==n: return 1
    return binomial(m-1,n)+binomial(m-1,n-1)

binomial(5,3)
10

binomial.cache
{(3, 2): 3, (3, 3): 1, (3, 1): 3, (2, 1): 2, (2, 0): 1, (4, 3): 4, (2, 2):
1, (4, 2): 6, (1, 0): 1, (1, 1): 1, (5, 3): 10}

Alec Mihailovs
http://mihailovs.com/Alec/






From arn.zart at gmail.com  Thu Jan 25 11:13:30 2007
From: arn.zart at gmail.com (arn.zart at gmail.com)
Date: 25 Jan 2007 08:13:30 -0800
Subject: match nested parenthesis
In-Reply-To: <1169521381.814119.27020@11g2000cwr.googlegroups.com>
References: <1169521381.814119.27020@11g2000cwr.googlegroups.com>
Message-ID: <1169741610.766625.134960@m58g2000cwm.googlegroups.com>


s99999999s2003 at yahoo.com wrote:
> hi
> i wish to find an reg exp for matching nested parenthesis of varying
> level like
> string =
> "somewords1(words(somewords2)-(some(some)words3)somestuff)somestuff"
> and be able to evaluate the pair starting from the inner most(the
> deepest level) , ie (some)
> up till the outer most. What is a good reg exp to do this? or is simple
> string manipulations enough?
> thanks

Evaluation using re.sub() and recursion (3 lines of code):

	def eval_sub(expr):
	  r"""Evaluate subexpressions in nested paired delimiters.

	  For example,
	  ?  	single left-pointing angle quotation  	&lsaquo;
	  ? 	single right-pointing angle quotation 	&rsaquo;

	  >>> eval_sub('?3 * ?3 + ??1 + 1? * 2???')
	  '21'
	  >>> eval_sub('?3 *  3 + ??1 + 1? * 2???') # test
mismatched delimiters
	  '13\x9b'
	  >>> '\x9b' == '?' # encoding ISO-8859-1
	  True
	  >>> eval_sub('3 * ??1 + 1? * 2 + 3?') # test absence of
outer delimiters
	  '3 * 7'
	  """
	  val, n = re.subn("?([^??]+)?", lambda m:
str(eval(m.group(1))), expr)
	  if n == 0:
	    return val
	  
	  return eval_sub(val)
	#end

This is just a proof of concept.



From bdesth.quelquechose at free.quelquepart.fr  Fri Jan  5 08:23:36 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 05 Jan 2007 14:23:36 +0100
Subject: checking one's type
In-Reply-To: <mailman.2314.1167986448.32031.python-list@python.org>
References: <mailman.2314.1167986448.32031.python-list@python.org>
Message-ID: <459e4b28$0$289$426a74cc@news.free.fr>

belinda thom a ?crit :
> Hi,
> 
> I've been using the following hack to determine if a type is  acceptable 
> and I suspect there is a better way to do it:
> 
> e.g.
> 
> if type(s) == type("") :
>    print "okay, i'm happy you're a string"

if isinstance(s, basestring):
   print """
There are very few cases where it makes sens to do such a
test anyway...
"""

> If anyone knows a better way, I'm all ears.

A few special cases excepted (ie your function can accept either a 
string or a sequence of strings...), the best thing is usually to not 
check types at all...


From bj_666 at gmx.net  Mon Jan 22 18:10:11 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 23 Jan 2007 00:10:11 +0100
Subject: beep or sound playing under linux
References: <pFath.50034$oA1.40310@newsfe19.lga>
Message-ID: <pan.2007.01.22.23.10.10.467236@gmx.net>

In <pFath.50034$oA1.40310 at newsfe19.lga>, hg wrote:

> Is there a way to do that ?

Maybe this helps:

  http://paste.pocoo.org/show/316/

Ciao,
	Marc 'BlackJack' Rintsch


From ralf at schoenian-online.de  Mon Jan 29 15:03:04 2007
From: ralf at schoenian-online.de (=?ISO-8859-1?Q?Ralf_Sch=F6nian?=)
Date: Mon, 29 Jan 2007 21:03:04 +0100
Subject: Sourcing Python Developers
In-Reply-To: <45BE4348.9020500@gmail.com>
References: <45BE4348.9020500@gmail.com>
Message-ID: <45be52f5$1@news.arcor-ip.de>

Kartic schrieb:
> Hello,
> 
> My company has quite a few opening involving python expertise. We are 
> always looking for python resources (and find it difficult filling these 
> positions, might I add). Is there any place to find developers' resumes 
> (like finding jobs from http://python.org/community/jobs/)? If any one 
> knows of a resume repository (other than Monster, Dice, 
> Costs-an-arm-and-leg job site) please share.

Do not know if you have to give your arm or your leg away, but maybe the 
following place is of interest for you:

http://www.opensourcexperts.com

Ralf Schoenian


From mail at microcorp.co.za  Sat Jan 13 04:00:40 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 13 Jan 2007 11:00:40 +0200
Subject: Is there a way to protect a piece of critical code?
References: <mailman.2524.1168424917.32031.python-list@python.org>	<eo2pgf$j57$1@news.albasani.net><mailman.2558.1168494787.32031.python-list@python.org>	<eo50g4$hct$1@news.albasani.net><mailman.2630.1168581723.32031.python-list@python.org>
	<eo7rf9$u7d$1@news.albasani.net>
Message-ID: <000401c73797$3e180760$03000080@hendrik>

 "robert" <no-spam at no-spam-no-spam.invalid> wrote:


> Hendrik van Rooyen wrote:

> > So far I have only used dicts to pass functions around
> > in a relatively unimaginative static jump table like way...
> 
> 
> Probably one has just to see that one can a pass a function object 
> (or any callable) around as any other object.
> Similar to a function address in assembler/C but very comfortable 
> and with the comfort of closures (which automatically hold the 
> status of local variables):
> 
> def f():
>      print "hello"
> 
> def g(func):
>      print "I'll do it ..."
>      func()
>      print "done."
> 
> 
> def run(x):
>      g(f)
>      a="local variable\n"
>      def h():
>          b="inner local"
>          print "inner function"
>          print x,a,b
>      g(h)
>      g(lambda:sys.stdout.write(a))
> 
> run(1)
> 
>  From there its just natural to not pass dead objects through an 
> inter-thread queue, but just code as it or even a "piece of 
> critical code" ...
> A small step in thought, but a big step in effect - soon 
> eliminating bunches of worries about queues, pop-races/None 
> objects, protocol, serialization, critical sections, thousands of 
> locks etc.

Thanks - this simplicity takes a bit of getting used to - I am used 
to passing what are effective entry point pointers around while
building state machines that run under interrupt - effectively
dynamically changing vectors for ticker based routines.  But
on the low level, trying to pass data at the same time is a bit
of a pain, as you have to look after it yourself, so the 
temptation is great to only use globals...  
This passing_the_function_along_with_its_data is neat...

*sigh* now if only it were possible to do it over a serial link,
in the same way as through a queue (I know about Pyro, but
this does not seem quite the same thing )

I suppose its not really possible - because while I suspect only 
"pointers" get passed through say a queue, you would have to
send the actual code along as well over a link - or you need a 
mirror of the code on both sides, and a way to translate 
addresses - which I suppose is why Pyro looks like it does.

I am working on something similar on a *very* small scale 
at the moment, in the context of control of physical things.
Hence the sigh.

- Hendrik



From creechm at gmail.com  Thu Jan 11 14:41:15 2007
From: creechm at gmail.com (Mark)
Date: 11 Jan 2007 11:41:15 -0800
Subject: Need better run/edit method. I have to restart the shell after every
	script change.
Message-ID: <1168544475.849070.92160@77g2000hsv.googlegroups.com>

Hello,

What I need to know is if there is a better method to run/edit modules
on my pc.
I'm currently running the IDLE shell under Python 2.5, on Windows XP.

Every time I edit my .txt or .py file, I have to restart the IDLE shell
for the changes to take effect. It's pretty annoying. Assuming IDLE is
already open, here are the steps that I typically take:

1. Open .txt version of module or script using notepad
2. make changes
3. save .txt file as .txt file
4. save .txt file as .py file
5. reset IDLE
6. import module again

As you can see, I'm wasting a lot of time with this method.  Maybe
there is some better sofware available, or maybe I'm just not utilizing
the tools at my disposal.  Either way I would greatly appreciate any
insight into this problem. 

Thanks in advance,
Mark



From practicalperl at gmail.com  Fri Jan 19 01:51:44 2007
From: practicalperl at gmail.com (Jm lists)
Date: Fri, 19 Jan 2007 14:51:44 +0800
Subject: Why this script can work?
Message-ID: <fbe35f750701182251l1cee4bf6q3982847d40ccd0bc@mail.gmail.com>

Please help with this script:

class ShortInputException(Exception):
        '''A user-defined exception class.'''
        def __init__(self,length,atleast):
                Exception.__init__(self)
                self.length=length
                self.atleast=atleast

try:
        s=raw_input('Enter something --> ')
        if len(s)<3:
                raise ShortInputException(len(s),3)
        # Other work can continue as usual here
except EOFError:
        print '\nWhy did you do an EOF on me?'
except ShortInputException,x:
        print 'ShortInputException: The input was of length %d, was
expecting at least %d' %(x.length,x.atleast)
else:
        print 'No exception was raised.'


My questions are:

1) ShortInputException,x:   what's the 'x'? where is it coming?

2) The 'if' and 'else' are not in the same indent scope,why this can work?

Thanks in advance.


From missive at frontiernet.net  Thu Jan 25 17:41:09 2007
From: missive at frontiernet.net (Lee Harr)
Date: Thu, 25 Jan 2007 22:41:09 GMT
Subject: pdf to text
References: <epb638$gd4$1@solaris.cc.vt.edu>
	<86714$45b9254c$54d1d767$3741@news.chello.no>
	<epb9s7$nnk$1@solaris.cc.vt.edu>
Message-ID: <9mauh.1282$B25.1253@news01.roc.ny>


> Perhaps I'm just using pdftotext wrong? Here's how I was using it:
>

>      sout = os.popen('pdftotext "%s" - ' %f)


If you are having trouble with popen (not unlikely)
how about just writing to a temporary file and 
reading the text from there?

I've used pdftotext several times in the past few
weeks (but not on windows). It was a major
time saver for me.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan  8 19:03:41 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 09 Jan 2007 01:03:41 +0100
Subject: Execute binary code
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<EOSdneXxmrS6OT_YnZ2dnUVZ_q7inZ2d@comcast.com>
	<50fujcF1g1nplU2@mid.individual.net>
	<1168298153.982394.181090@q40g2000cwq.googlegroups.com>
Message-ID: <50g4etF1ff6ceU1@mid.individual.net>

citronelu at yahoo.com wrote:

> The code I try to execute is Windows specific and it is binary,
> not python. Furthermore, it is stored in a variable within the
> parent python script, not stored on harddisk as a file.

Sure, I just wanted to show that your special application is not
specific for trojan horses oder viruses. One could achieve similar
replication functionality with python by itself.

Regards,


Bj?rn

-- 
BOFH excuse #217:

The MGs ran out of gas.



From gherron at digipen.edu  Wed Jan 31 02:28:17 2007
From: gherron at digipen.edu (Gary Herron)
Date: Tue, 30 Jan 2007 23:28:17 -0800
Subject: PY Zip
In-Reply-To: <1170220732.552072.163560@k78g2000cwa.googlegroups.com>
References: <1170220732.552072.163560@k78g2000cwa.googlegroups.com>
Message-ID: <45C04511.1090005@digipen.edu>

GISDude wrote:
> Hi all.
>
> I am trying to find a module that has a Zip utility that I can use in
> Python. I would like to be able to call the module and ZIP up a
> directory. I thought there was such a module, but I have not been able
> to find it.
>
> I need this to be able to be used in Python Win. Is there a ZIP utilty
> already stored with a basic PYTHON download?
>
> Thanks all.
>
>   
The module you want is called zipfile, and its part of the standard library.

See: http://docs.python.org/lib/module-zipfile.html for documentation.

Gary Herron



From sturlamolden at yahoo.no  Sat Jan 20 22:07:47 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 20 Jan 2007 19:07:47 -0800
Subject: A solution to the MSVCRT vs MSVCR71 problem?
Message-ID: <1169348867.369917.104970@m58g2000cwm.googlegroups.com>


This question has been asked many times, and last time I was accused of
spreading FUD. So now I will rather propose a solution.

The reason for the problem is as follows:

The binary installer for Python built by te python.org team is compiled
with Microsoft Visual Studio 2003. It is linked with the C runtime
msvcrt71.dll. The copyright to msvcrt71.dll is owned by Microsoft, and
it is not an integral part of the Windows operating system. This leads
to two distinct problems:

Problem 1: You want to use a particular compiler to build a Python
extension library, but it links with the wrong CRT. Typical examples
are MinGW, Microsoft Visual C++ 6.0 and Microsoft Visual C++ Express.
There is a remedy for MinGW, but not for the other two.

Problem 2: You want to distribute a program created Py2Exe, but has no
license for Visual Studio 2003. You are therefore not allowed to
redistribute msvcrt71.dll. But without this DLL your program will not
work. As a side note: Visual Studio 2003 is out of sale, so if you
don't have it already you may be out of luck.

The solution: modify the IAT of to use the correct binary.

The process is really simple:

Solution to problem 1:

Compile with your compiler or choice, never mind which CRT are used.
Use a 'dumpbin' program, find all references to msvcrt in the binary
DLL file. Create a dll with name "py_crt" that exports these functions
but redirects them to msvcrt71. That is, in the file py_crt.def we put
something like

EXPORTS
malloc=msvcr71.malloc
free=msvcr71.free
etc.

Compile the DLL py_crt.dll and then open your pyd file in binary mode.
Exchange all occurances of the string "msvcrt" (or any other CRT name)
with "py_crt". Now your binary should work just fine. What you need to
make sure is just that the name of the proxy has the same number of
letters as the CRT your compiler linked. So if it is msvcrt81.dll, e.g.
use something like py_crt81.dll instead of py_crt.dll.

Solution to problem 2:

This would be the opposite, involving modifying Python25.dll and all
pyd and dll files gathered by Py2Exe to use msvcrt.dll instead of
msvcr71.dll. One could e.g. create a DLL called py_cr71.dll that
redirects CRT calls to msvcrt.dll or any other CRT of choice. In
py_cr71.def we would then have:

EXPORTS
malloc=msvcrt.malloc
free=msvcrt.free
etc.

And then it is simply a matter of modifying the binaries to load
py_cr71.dll instead of msvcrt71.dll.

What we need to make this work:

1. A dumpbin facility similar to the one that ships with Visual Studio
that can be freely distributed.

2. A python script that parses the output from dumpbin, creates the
proxy and redirects the CRT. (I already have such a script working.)

Finally, a setup script (setup.py) could automate this task for
"problem 1" above.

Another variant of the fake-CRT procedure, which would also work, is to
create a fake msvcrt71.dll that redirects to your CRT of choice, and
replace the msvcrt71.dll that came with Python with that. That is
conceptually simpler, as it involves not binary modifications, but
someone might mistake your msvcrt71.dll for the msvcrt71.dll from
Microsoft. Also antivirus-software might not like attempts to load such
a DLL as it would look like your program is hijacked by a trojan
(although it is not).

What do you think?



From felipe.lessa at gmail.com  Tue Jan  9 10:44:45 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Tue, 9 Jan 2007 13:44:45 -0200
Subject: Determine an object is a subclass of another
In-Reply-To: <c2701f5c0701090744w42f8e9c9l529f4d46ca3b01c9@mail.gmail.com>
References: <1168353205.066357.39530@42g2000cwt.googlegroups.com>
	<1168353975.285391.212350@m30g2000cwm.googlegroups.com>
	<1168354891.334807.58940@s80g2000cwa.googlegroups.com>
	<c2701f5c0701090744w42f8e9c9l529f4d46ca3b01c9@mail.gmail.com>
Message-ID: <c2701f5c0701090744m3b31118ajb0989a90bb361b9d@mail.gmail.com>

On 9 Jan 2007 07:01:31 -0800, abcd <codecraig at gmail.com> wrote:
> anyways, is there a way to check without having an instance of the
> class?

In [1]: class A:
   ...:     pass
   ...:

In [2]: class B(A):
   ...:     pass
   ...:

In [3]: issubclass(B, A)
Out[3]: True

In [4]: isinstance(B(), B)
Out[4]: True

In [5]: isinstance(B(), A)
Out[5]: True

--
Felipe.


From gagsl-py at yahoo.com.ar  Thu Jan 18 10:01:36 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 18 Jan 2007 12:01:36 -0300
Subject: import vs. subdirectory search
References: <45AED511.8090307@animats.com>
Message-ID: <eoo24j$tvo$1@sea.gmane.org>

"John Nagle" <nagle at animats.com> escribi? en el mensaje 
news:45AED511.8090307 at animats.com...

>    I'm running Python 2.3.4 from a CGI script on a shared hosting Linux 
> system.
> The CGI program is being executed from Apache, as "nobody".  I have some
> local modules installed in "~myname/lib/python"; these include
> "MySQLdb" and "M2Crypto".
>
>    Since this is running as "nobody", I append
>
> /home/myname/lib/python
>
> to sys.path.
>
>    Within the CGI programs,
>
> import MySQLdb # works fine
> import M2Crypto # works fine
> import SSL # "No module named SSL"
>
> The problem is that SSL is in a subdirectory of the M2Crypto directory,
> and that's not being searched.
And should *not* be searched, unless the importing module is itself in the 
M2Crypto directory.

> I can execute "import M2Crypto.SSL",
> but that doesn't have the same effect; it puts SSL in a different
> place in the namespace.  I'm trying to avoid that; it causes obscure
> aliasing problems.
You *could* do: from M2Crypto import SSL, but I think this is not your 
problem.

>    On Python 2.4 under Windows 2000, importing from a subdirectory
> appears to work.  Is that a Python 2.3.4 thing, or a Linux thing,
> or something else?
No, it should not work as you describe it. Either you have another SSL 
module in another place, or sys.path includes the M2Crypto directory.
On your 2.4 Windows, try this:
import sys
import SSL
print SSL.__file__
print sys.path
and see what happens





From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan  8 17:20:45 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 08 Jan 2007 23:20:45 +0100
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org>
Message-ID: <50fudtF1g1nplU1@mid.individual.net>

Rory Campbell-Lange wrote:

> Is using the decimal module the best way around this? (I'm
> expecting the first sum to match the second). It seem
> anachronistic that decimal takes strings as input, though.

What's your problem with the result, or what's your goal? Such
precision errors with floating point numbers are normal because the
precision is limited technically. 

For floats a and b, you'd seldom say "if a == b:" (because it's
often false as in your case) but rather 
"if a - b < threshold:" for a reasonable threshold value which
depends on your application.

Also check the recent thread "bizarre floating point output".

Regards,


Bj?rn

-- 
BOFH excuse #333:

A plumber is needed, the network drain is clogged



From bignose+hates-spam at benfinney.id.au  Wed Jan 31 22:01:49 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 01 Feb 2007 14:01:49 +1100
Subject: division by 7 efficiently ???
References: <1170297774.859006.29490@a75g2000cwd.googlegroups.com>
Message-ID: <87veimtwbm.fsf@benfinney.id.au>

krypto.wizard at gmail.com writes:

> How to divide a number by 7 efficiently without using - or /
> operator.  We can use the bit operators. I was thinking about bit
> shift operator but I don't know the correct answer.

I think you are asking for help on a homework assignment in violation
of collusion and plagiarism rules of your educational institution, and
I claim my ten zorkmids.

Please use the resources made available to you in your course of
study; this almost certainly does not include having people on
discussion forums answer the homework for you.

-- 
 \       "I like to go to art museums and name the untitled paintings. |
  `\             'Boy With Pail'. 'Kitten On Fire'."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From mail at microcorp.co.za  Tue Jan  9 03:27:56 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 9 Jan 2007 10:27:56 +0200
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com><ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net><7x7ivz88af.fsf@ruckus.brouhaha.com><mailman.2385.1168171076.32031.python-list@python.org><7xmz4v11jq.fsf@ruckus.brouhaha.com><mailman.2414.1168264117.32031.python-list@python.org>
	<pan.2007.01.08.22.24.34.419033@REMOVE.THIS.cybersource.com.au>
Message-ID: <021c01c733c8$41d98a40$03000080@hendrik>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> wrote:


> On Mon, 08 Jan 2007 13:11:14 +0200, Hendrik van Rooyen wrote:
>
> > When you hear a programmer use the word "probability" -
> > then its time to fire him, as in programming even the lowest
> > probability is a certainty when you are doing millions of
> > things a second.
>
> That is total and utter nonsense and displays the most appalling
> misunderstanding of probability, not to mention a shocking lack of common
> sense.

Really?

Strong words.

If you don't understand you need merely ask, so let me elucidate:

If there is some small chance of something occurring at run time that can
cause code to fail - a "low probability" in all the accepted senses of the
word - and a programmer declaims - "There is such a low probability of
that occurring and its so difficult to cater for that I won't bother"
- then am I supposed to congratulate him on his wisdom and outstanding
common sense?

Hardly. - If anything can go wrong, it will. - to paraphrase Murphy's law.

To illustrate:
If there is one place in any piece of code that is critical and not protected,
even if its in a relatively rarely called routine, then because of the high
speed of operations, and the fact that time is essentially infinite, it WILL
fail, sooner or later, no matter how miniscule the apparent probability
of it occurring on any one iteration is.

How is this a misunderstanding of probability?  - probability applies to any one
trial, so in a series of trials, when the number of trials is large enough - in
the
order of the inverse of the probability, then ones expectation must be that the
rare occurrence should occur...

There is a very low probability that any one gas molecule will collide with any
other one in a container - and  "Surprise!  Surprise! " there is nevertheless
something like the mean free path...

That kind of covers the math, albeit in a non algebraic way, so as not to
confuse what Newton used to call "Little Smatterers"...

Now how does all this show a shocking lack of common sense?

- Hendrik




From hotfigs at gmail.com  Sun Jan  7 14:20:44 2007
From: hotfigs at gmail.com (Geoff)
Date: 7 Jan 2007 11:20:44 -0800
Subject: OpenBSD, Apache and Python
Message-ID: <1168197644.544400.72180@v33g2000cwv.googlegroups.com>

Hi!

I'm wanting to use openbsd to run a webserver because of its high
security. The website is written in python. Before I was using linux
with apache 2 and mod_python and this worked well. My problem is that
mod_python 3.x does not work on apache 1 which is what comes with
openbsd (and has been hardened buy the openbsd guys). One option is to
use mod_python 2.x, but this has not seen any development since 2004.

I'm now looking at using fastcgi to run my python. This looks like it's
going to work fine, though I will be using a fcgi interface such as
http://jonpy.sourceforge.net/. There does not seem to be any official
fastcgi module for python.

Should I be worried about the stability and security of the python fcgi
interfaces? Is there something better (more mature / battle tested)?
Are there any other options available to me - considering that security
is very important?

Thanks for any help,

Geoff



From kw at codebykevin.com  Sun Jan 28 19:03:51 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Sun, 28 Jan 2007 19:03:51 -0500
Subject: Function to create Tkinter PhotoImages from directory?
Message-ID: <b3a5d$45bd39e8$4275d90a$1567@FUSE.NET>

I am trying to create a number of Tk PhotoImages from a single
directory. Currently I am hard-coding file names and image names, like so:

 def makeImages(self):
        self.imagedir = (os.getcwd() + '/images/')
        self.folder_new=PhotoImage(file=self.imagedir + 'folder_new.gif')
        self.save=PhotoImage(file = self.imagedir + 'save.gif')
        self.folder=PhotoImage(file=self.imagedir + 'folder.gif')
        self.help=PhotoImage(file=self.imagedir + 'help.gif')
        self.fontsmall=PhotoImage(file=self.imagedir + 'fontsmall.gif')
        self.stop=PhotoImage(file=self.imagedir + 'stop.gif')

What I'd like to do is glob the directory and create images with the
same name as the gif file, but I can't figure out how to get that to
work. Can anyone help?

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


From bearophileHUGS at lycos.com  Tue Jan 16 16:40:56 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 16 Jan 2007 13:40:56 -0800
Subject: How can I create a linked list in Python?
In-Reply-To: <mailman.2791.1168975031.32031.python-list@python.org>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
Message-ID: <1168983652.192715.235580@a75g2000cwd.googlegroups.com>

Gary Herron:
> If you really want a list (as Python defines a list - with all the methods) then you should use Python's lists.  They are quite efficient and convenient:

In CPython they are dynamic arrays, they aren't lists. Try adding
elements at the beginning of a list compared to adding elements at the
beginning or in the middle of a python "list" and you will see the
efficiency differences.


> The concept of a linked list if a figment of languages with pointer data types.

You may manage a list with a language without pointers, like *basic*
(for students) Scheme. Creating a List data type for Python is possible
too, without true pointer like ones found in Pascal.


>However, you're much better off if you can use Python's list data structure rather
>than try to emulate an outdated concept in a modern language.

Simple lists today aren't much efficient because their pointers break
cache locality, they may cause cache trashing, so they may be slower
than smarter and more localized structures, like short double linked
arrays, etc.
But I think lists aren't outdated, they are a mathematical concept too,
and they are quite used still.
If you want to learn some Computer Science, it's positive to know what
linked lists are.
If you want to implement algorithms that must process LOT of things,
you may find pointers and lists quite necessary today too, see for
example:
http://citeseer.ist.psu.edu/knuth00dancing.html
http://en.wikipedia.org/wiki/Dancing_Links
Python and its data structures aren't the right solutions for all
purposes.

Bye,
bearophile



From edquichan at yahoo.com  Thu Jan 18 16:49:38 2007
From: edquichan at yahoo.com (EdG)
Date: 18 Jan 2007 13:49:38 -0800
Subject: Traversing the properties of a Class
In-Reply-To: <45afe338$0$318$426a74cc@news.free.fr>
References: <1169141253.332211.12790@38g2000cwa.googlegroups.com>
	<slrneqvgtv.r0.horpner@FIAD06.norwich.edu>
	<1169152688.921153.26150@m58g2000cwm.googlegroups.com>
	<45afe338$0$318$426a74cc@news.free.fr>
Message-ID: <1169156978.883998.242180@51g2000cwl.googlegroups.com>

That works perfectly thank you.

Bruno Desthuilliers wrote:
> EdG a ?crit :
> (top-post corrected)
> >
> > Neil Cerutti wrote:
> >
> >>On 2007-01-18, EdG <edquichan at yahoo.com> wrote:
> >>
> >>>For debugging purposes, I would like to traverse the class
> >>>listing out all the properties.
> >>
> >>This is the first thing that came to mind.
> >>
> >>def show_properties(cls):
> >>  for attr in dir(cls):
> >>    if isinstance(getattr(cls, attr), property):
> >>      print attr
> >>
>
>  > This works great.  I have one more question.  Now that I have the name
>  > of the property, how do I get it's value?
>  >
>  > I want to print  '%s = %s' % (attr,theattributesvalue)
>
>
> Then you need to have the instance...
>
> def list_properties(cls):
>    return [
>      name for name in dir(cls)
>      if isinstance(getattr(cls, name), property)
>    ]
>
> def print_properties(obj):
>    for name in list_properties(obj.__class__):
>      print "%s : %s" % (name, str(getattr(obj, name)))



From gagsl-py at yahoo.com.ar  Thu Jan 11 19:11:30 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 21:11:30 -0300
Subject: os.popen() not executing command on windows xp
In-Reply-To: <1168535370.211599.265250@p59g2000hsd.googlegroups.com>
References: <1168508553.151827.261420@k58g2000hse.googlegroups.com>
	<1168509560.119819.78470@o58g2000hsb.googlegroups.com>
	<1168535370.211599.265250@p59g2000hsd.googlegroups.com>
Message-ID: <7.0.1.0.0.20070111210043.01ce28c8@yahoo.com.ar>

At Thursday 11/1/2007 14:09, nic wrote:

>import os
>pstr = r'"c:\Program Files\Grisoft\AVG Free\avgscan.exe" "c:\program
>files\temp1\test1.txt"'
>a = os.popen(pstr)
>print a.read()
>
>I've confirmed the string I'm inputting to os.popen is EXACTLY the same
>as the one I can successfully execute manually in command prompt, so
>when I go:
>print pstr, it yields:
>"c:\Program Files\Grisoft\AVG Free\avgscan.exe" "c:\program
>files\temp1\test1.txt"
>
>The problem remains popen won't execute this line as it does when
>inputted manually to command prompt.

I have AVG so I tried this example. That's not the problem. popen 
works ok, avgscan is executed. But the avgscan program does *not* use 
stdout nor stderr to write to the console, so popen can't capture its output.
You can confirm this at the command prompt:

"c:\Program Files\Grisoft\AVG Free\avgscan.exe" "c:\program 
files\temp1\test1.txt" >output.txt 2>&1

You will see the usual progress messages from avgscan *on screen*, 
and when you type output.txt, it's empty. avgscan appears to write 
directly to the console.
You may use the /REPORT option; avgscan /? for details.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From martin at v.loewis.de  Thu Jan  4 11:47:10 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 04 Jan 2007 17:47:10 +0100
Subject: Using External Libraries with python?
In-Reply-To: <mailman.2288.1167928335.32031.python-list@python.org>
References: <mailman.2288.1167928335.32031.python-list@python.org>
Message-ID: <459D2F8E.1080600@v.loewis.de>

Ognjen Bezanov schrieb:
> I have some external C libraries I would like to use with python.
> 
> I have been searching on the internet and found many such
> modules/bindings for libraries (e.g. Py-Lame) but have not yet
> come across any information of how to actually go about creating such
> bindings, so I was wondering if anybody here could point me in the right
> direction?

There are several methods. One is to write a Python C module by hand,
using the Python C API:

http://docs.python.org/ext/ext.html
http://docs.python.org/api/api.html

Essentially, all you need is a DLL/shared-object with an init
function.

Other solutions include tools that generate extension modules
automatically (such as SWIG or Pyrex), or using libraries on
top of the C API (such as Boost.Python).

I personally always use the C API directly.

Regards,
Martin


From robert.kern at gmail.com  Thu Jan 11 18:16:38 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 11 Jan 2007 17:16:38 -0600
Subject: globals accros modules
In-Reply-To: <38388$45a6b867$d443bb3a$10089@news.speedlinq.nl>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>	<mailman.2556.1168492539.32031.python-list@python.org>	<3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>	<45a66cea$0$289$426a34cc@news.free.fr>	<3137a$45a6851a$d443bb3a$24085@news.speedlinq.nl>	<45a69cca$0$321$426a74cc@news.free.fr>
	<38388$45a6b867$d443bb3a$10089@news.speedlinq.nl>
Message-ID: <eo6ggt$lrl$1@sea.gmane.org>

Stef Mientki wrote:
> Bruno Desthuilliers wrote:

>> Unless you clearly explain the benefits... Any code relying on the 
>> existence of a global is:
>> 1/ dependent on the existence of this global
>> 2/ harder to understand
> And you think physicians will believe that ?
> And suppose they believe it, are the willing to stop their research to 
> rethink and rewrite their code ;-)

If they give a damn about their research, they will. Sloppy, irreproducible lab
technique is not acceptable. Sloppy, impossible-to-verify code shouldn't be, either.

I'd say more, but Greg Wilson has said it better, and has provided course
materials to teach good programming practices to scientists.

  http://swc.scipy.org/

Of particular note are his article in the _American Scientist_:

  http://www.americanscientist.org/template/AssetDetail/assetid/48548

and his slides from his talk at SciPy '06:

  http://www.third-bit.com/lectures/scipy06.pdf

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From pibizza at gmail.com  Sat Jan 13 03:21:54 2007
From: pibizza at gmail.com (PaoloB)
Date: 13 Jan 2007 00:21:54 -0800
Subject: Barcode recognition in Python
Message-ID: <1168676514.115592.181620@v45g2000cwv.googlegroups.com>

Hi everyone,

I am searching for a python library for barcode recognition. We have
developed a rather complex application for document tracking and
document management in python/Zope, called PAFlow (www.paflow.it:
sorry, most of the information is in Italian...).

As our project is completely free software, we will need a library that
is free software too.

Is there something like this in python ?

Ciao

PaoloB



From beliavsky at aol.com  Sun Jan 21 22:26:17 2007
From: beliavsky at aol.com (Beliavsky)
Date: 21 Jan 2007 19:26:17 -0800
Subject: Reading Fortran Data
In-Reply-To: <1169433752.130978.133210@a75g2000cwd.googlegroups.com>
References: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
	<1169424273.929396.133880@m58g2000cwm.googlegroups.com>
	<1169429808.910298.10240@11g2000cwr.googlegroups.com>
	<1169433752.130978.133210@a75g2000cwd.googlegroups.com>
Message-ID: <1169436377.634274.172460@s34g2000cwa.googlegroups.com>


Carl Banks wrote:

<snip>

> > A Fortran
> > list-directed write can print results in an almost arbitrary format,
> > depending on the compiler. Many compilers will separate integers by
> > several spaces, not just one, and they could use commas instead of
> > spaces if they wanted.
>
> 1. Hardly any compiler will produce a line of two integers, or reals,
> that another compiler couldn't read back.

Yes, but for more than three numbers, the statement is wrong. Intel
Fortran prints four double precision random n
as

  0.555891433847495       0.591161642339424       0.888434673900224

  0.487293557925127

but g95 prints them on a single line. I advise against using
list-directed Fortran writes to create files that other programs will
read, and I think most experienced Fortran programmers would agree.



From libintr at gmail.com  Thu Jan 25 12:28:44 2007
From: libintr at gmail.com (lee)
Date: 25 Jan 2007 09:28:44 -0800
Subject: running applications in python
Message-ID: <1169746124.376610.139420@13g2000cwe.googlegroups.com>

how can i run or open a windows application from the python prompt?for
e.g.mediaplayer opening,folder acess etc



From jairodsl at gmail.com  Sat Jan 13 20:10:56 2007
From: jairodsl at gmail.com (jairodsl)
Date: 13 Jan 2007 17:10:56 -0800
Subject: Comparing a matrix (list[][]) ?
In-Reply-To: <1168735426.313475.212710@11g2000cwr.googlegroups.com>
References: <1168730648.038901.187460@v45g2000cwv.googlegroups.com>
	<eobrm4$p68$1@cernne03.cern.ch>
	<1168735426.313475.212710@11g2000cwr.googlegroups.com>
Message-ID: <1168737056.494694.173770@s34g2000cwa.googlegroups.com>

Thanks a lot, it was that i need !!! Works very good !

bearophileHUGS at lycos.com wrote:
> Roberto Bonvallet:
> > What output are you expecting from your example matrix?  If you are expecting
> > it to be 5 (the smallest positive element), using "min" is the way to do it:
> >     >>> matrix = [[9,  8, 12, 15],
> >     ...           [0, 11, 15, 18],
> >     ...           [0,  0, 10, 13],
> >     ...           [0,  0,  0,  5]]
> >     >>> min(min(x for x in row if x > 0) for row in matrix)
> >     5
>
> This looks a bit like homework...
> To find the minimal number > 0 of the matrix this seems better:
>
> mat = [[9, 8,  12, 15],
>        [0, 11, 15, 18],
>        [0,  0, 10, 13],
>        [0,  0,  0,  5]]
>
> print min(el for row in mat for el in row if el > 0)
>
> Note that this raises TypeError is the matrix doesn't have one or more
> numbers > 0
> If the OP needs the position he/she can do something like:
>
> nozeromin = 1e300 # or something similar
> pos = None, None
>
> for nrow, row in enumerate(mat):
>     for ncol, el in enumerate(row):
>         if el > 0 and el < nozeromin:
>             nozeromin = el
>             pos = nrow, ncol
> 
> print nozeromin, pos
> 
> Bye,
> bearophile



From redvasily at gmail.com  Tue Jan  9 02:10:06 2007
From: redvasily at gmail.com (Vasily Sulatskov)
Date: 8 Jan 2007 23:10:06 -0800
Subject: Adding functions to classes after definition
In-Reply-To: <mailman.2458.1168308235.32031.python-list@python.org>
References: <45A2E61F.2080100@andrew.cmu.edu>
	<mailman.2458.1168308235.32031.python-list@python.org>
Message-ID: <1168326606.264695.97740@s80g2000cwa.googlegroups.com>

A nice guide to descriptors

http://users.rcn.com/python/download/Descriptor.htm



From domma at procoders.net  Tue Jan 23 17:45:25 2007
From: domma at procoders.net (Achim Domma)
Date: Tue, 23 Jan 2007 23:45:25 +0100
Subject: Overloading assignment operator
In-Reply-To: <1169579940.966652.191990@l53g2000cwa.googlegroups.com>
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
	<1169579940.966652.191990@l53g2000cwa.googlegroups.com>
Message-ID: <45b69009$0$5729$9b4e6d93@newsspool3.arcor-online.net>

Paul McGuire wrote:

> Simple option: how do you feel about using '<<=' instead of '=' (by
> defining __ilshift__)?  This gives you:
> 
> A <<= B * C
> 
> (looks sort of like "injecting" the result of B times C into A)

Thanks! That is exactly the kind of solution I was looking for! :-)

Achim


From fhk6431 at gmail.com  Mon Jan 15 12:17:12 2007
From: fhk6431 at gmail.com (fhk6431 at gmail.com)
Date: 15 Jan 2007 09:17:12 -0800
Subject: Looking for Job
Message-ID: <1168881431.411312.98530@51g2000cwl.googlegroups.com>

Hi,

Any one looking for job.. I need someone good at phyton to do black box
and white box testing

Contact me at fhk6431 at gmail.com



From fd.calabrese at gmail.com  Mon Jan  8 12:28:10 2007
From: fd.calabrese at gmail.com (cesco)
Date: 8 Jan 2007 09:28:10 -0800
Subject: recursive function
References: <1168265240.294223.298750@s80g2000cwa.googlegroups.com>
	<slrneq4ne7.k8.horpner@FIAD06.norwich.edu>
Message-ID: <1168277289.970128.44880@38g2000cwa.googlegroups.com>


Neil Cerutti wrote:
> On 2007-01-08, cesco <fd.calabrese at gmail.com> wrote:
> > Hi,
> >
> > I have a dictionary of lists of tuples like in the following example:
> > dict = {1: [(3, 4), (5, 8)],
> >         2: [(5, 4), (21, 3), (19, 2)],
> >         3: [(16, 1), (0, 2), (1, 2), (3, 4)]]
> >
> > In this case I have three lists inside the dict but this number
> > is known only at runtime. I have to write a function that
> > considers all the possible combinations of tuples belonging to
> > the different lists and return a list of tuples of tuples for
> > which the sum of the first element of the most inner tuple is
> > equal to N.
> >
> > For example, assuming N = 24, in this case it should return:
> > [((3, 4), (5, 4), (16, 1)), ((3, 4), (21, 3), (0, 2)), ((5, 8), (19,
> > 2), (0, 2))]
>
> What do you mean by "most inner tuple"?
>
> > A simple list comprehension would be enough if only I knew the
> > number of keys/lists beforehand
>
> len(dict.keys()).

What I mean is that the number of keys/lists is not known until runtime
and it changes randomly from time to time which means I would have to
write every time a different list comprehension (or a different number
of nested loops) to accomplish the same thing.
In the example the result of the search should be a list containing
three tuples each of which contains again three tuple (the most inner
tuples). If you consider the first element of each tuple the sum is 24
(like in 3+5+16, or 3+21+0 or 5+19+0).

Any other help will be appreciated



From gagsl-py at yahoo.com.ar  Mon Jan 15 18:33:54 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 15 Jan 2007 20:33:54 -0300
Subject: Anyone has a nice "view_var" procedure ?
In-Reply-To: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
References: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
Message-ID: <7.0.1.0.0.20070115200412.05c71528@yahoo.com.ar>

At Monday 15/1/2007 17:45, Stef Mientki wrote:

>Is there some handy/ nice manner to view the properties of some variable ?
>As a newbie, I often want to see want all the properties of a var,
>and also some corner values (large arrays) etc.

You can try dir(x), vars(x). If you want a "nice print", see the pprint module.

py> import csv
py> x = csv.DictReader('') # a bogus object
py> x
<csv.DictReader instance at 0x00BC79B8>
py> dir(x)
['__doc__', '__init__', '__iter__', '__module__', 'fieldnames', 
'next', 'reader'
, 'restkey', 'restval']
py> vars(x)
{'restkey': None, 'restval': None, 'fieldnames': None, 'reader': 
<_csv.reader ob
ject at 0x00BC98B8>}
py> from pprint import pprint
py> pprint(vars(x))
{'fieldnames': None,
  'reader': <_csv.reader object at 0x00BC98B8>,
  'restkey': None,
  'restval': None}
py>

>Probably it's not so difficult,
>but I don't see how to distinguish for example between a string and an
>array. An array has a shape, a string not etc.

Yes, strings share a lot of functionality with other sequence types: 
[], len, in, etc. You can test if an object is a string using 
isinstance(obj, str). If you want to include unicode objects too, use 
isinstance(obj, basestring).


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From stargaming at gmail.com  Sun Jan 28 06:43:22 2007
From: stargaming at gmail.com (Stargaming)
Date: Sun, 28 Jan 2007 12:43:22 +0100
Subject: from future module!!!!!!!
In-Reply-To: <1169983511.674847.281290@s48g2000cws.googlegroups.com>
References: <1169983511.674847.281290@s48g2000cws.googlegroups.com>
Message-ID: <epi28q$ic4$1@ulysses.news.tiscali.de>

lee schrieb:
> Guys whats the from future module in python?thanks
> 

http://docs.python.org/lib/module-future.html

It's a module with that "future changes" may be activated (currently 
such as the with_statement, what isn't in the "2.5 standard" so far).

BTW, it's not the 'from future' module, it's just the 'future' (or 
'__future__') module. The 'from' clause is a keyword in python used for 
imports in the module namespace.

Stargaming


From S.Mientki-nospam at mailbox.kun.nl  Tue Jan 16 18:13:37 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Wed, 17 Jan 2007 00:13:37 +0100
Subject: Anyone has a nice "view_var" procedure ?
In-Reply-To: <1168904865.253014.210140@m58g2000cwm.googlegroups.com>
References: <3de03$45abe7d2$d443bb3a$6698@news.speedlinq.nl>
	<1168904865.253014.210140@m58g2000cwm.googlegroups.com>
Message-ID: <8ab5f$45ad5c12$d443bb3a$7243@news.speedlinq.nl>

Adam wrote:
> Stef Mientki wrote:
> 
>> hello,
>>
>> Is there some handy/ nice manner to view the properties of some variable ?
>> As a newbie, I often want to see want all the properties of a var,
>> and also some corner values (large arrays) etc.
>>
>> Probably it's not so difficult,
>> but I don't see how to distinguish for example between a string and an
>> array. An array has a shape, a string not etc.
>>
>>
>> thanks,
>> Stef Mientki
> 
> I am also a newbie so if this is not what you want I can't give much
> more as of yet.
>
Ok, here's my current solution,
probably not very Pythonian, (so suggestions are welcome)
but it works.
(Too bad I can get the name of the var into a function ;-)

cheers,
Stef Mientki

from scipy import *


# 
#############################################################################
def prn ( V ):
   # print a single row of an array
   def prn_array_row ( R, row ):
     if len(R) < 4: print '  Row', row, ':', R
     else:
       print '  Row', row, ': [', R[0],R[1], '...', R[-2], R[-1], ']'

   # print a single element of a list
   def prn_list_element ( E ):
     if   type(E) == int:     return '  ' + str(E)
     elif type(E) == float:   return '  ' + str(E)
     elif type(E) == complex: return '  ' + str(E)
     elif type(E) == list:    return '  [..]'
     elif type(E) == tuple:   return '  (..)'
     elif type(E) == array:   return '  ([..])'
     else:                    return '  ??'

   print ''
   if type(V) == int:
     print 'int32 =', V

   elif type(V) == float:
     print 'float64 =', V

   elif type(V) == complex:
     print 'complex64 =', V

   # LIST
   elif (type(V) == list) | (type(V) == tuple):
     # count the occurances of the different types
     N_int,N_float,N_complex,N_list,N_tuple,N_array,N_unknown = 
0,0,0,0,0,0,0
     for i in range(len(V)):
       if   type(V[i]) == int:     N_int     += 1
       elif type(V[i]) == float:   N_float   += 1
       elif type(V[i]) == complex: N_complex += 1
       elif type(V[i]) == list:    N_list    += 1
       elif type(V[i]) == tuple:   N_tuple   += 1
       elif type(V[i]) == ndarray: N_array   += 1
       else:                       N_unknown += 1

     # print the occurances of the different types
     # and count the number of types that can easily be displayed
     if type(V)==list: line = 'list:'
     else: line = 'tuple:'
     N = 0
     if N_int     > 0: line = line + '  N_Int='     + str(N_int)     ; N 
+= 1
     if N_float   > 0: line = line + '  N_Float='   + str(N_float)   ; N 
+= 1
     if N_complex > 0: line = line + '  N_Complex=' + str(N_complex) ; N 
+= 1
     if N_list    > 0: line = line + '  N_List='    + str(N_list)    ; N 
+= 1
     if N_tuple   > 0: line = line + '  N_Tuple='   + str(N_tuple)   ; N 
+= 1
     if N_array   > 0: line = line + '  N_Array='   + str(N_array)   ; N 
+= 1
     if N_unknown > 0: line = line + '  N_Unknown=' + str(N_unknown) ; N 
+= 1
     if N == 1: line += '  == Homogeneous =='
     print line

     # check if all elements have the same type

     if len(V) < 4:
       line = ''
       for i in range(len(V)): line += prn_list_element (V[i])
       print line
     else:
       print prn_list_element (V[0]),\
             prn_list_element (V[1]),\
             '  .....',\
             prn_list_element (V[-2]),\
             prn_list_element (V[-1])



   # ARRAY
   elif type(V) == ndarray:
     print 'Array', V.shape, V.dtype.name
     if V.ndim == 1:
       prn_array_row ( V, 0 )
     elif V.ndim == 2:
       if V.shape[1] < 4:
         for i in range(V.ndim): prn_array_row ( V[i,:], i )
       else:
         prn_array_row ( V[0,:], 0 )
         prn_array_row ( V[1,:], 1 )
         print '  ......'
         prn_array_row ( V[-2,:], V.shape[1]-2 )
         prn_array_row ( V[-1,:], V.shape[1]-1 )


# MAIN TEST PROGRAM 
##########################################################
V1 = 3
L1 = [ 11, 12, 33 ]
L2 = [ 11, 12, ['aap', 34] ]
T1 = ( 11, 12, ('aap', 34) )
T2 = ( 11, ('aap', 34), 5,5,5,5,5,5,8 )
A1 = array ( [1,2,7] )
A2 = array ( [ [1,2,4,4,4,4,4,8], [4,5,5,5,5,5,5,2] ] )
A3 = zeros ((10,10))
prn ( V1 )
prn ( L1 )
prn ( A1 )
prn ( A2 )
prn ( A3 )
prn ( L2 )
prn ( T1 )
prn ( T2 )


From tinaweb at bestemselv.com  Fri Jan 26 02:27:48 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Fri, 26 Jan 2007 08:27:48 +0100
Subject: Prefered install method?
Message-ID: <GuadndfwVf7pMCTYRVnzvA@telenor.com>

Another noob question:
I have written my first linux application that might actually be of 
interest to others. Just for fun I also wrote an install script that put 
the files in the common directories for my distro (Debian). That is in 
/usr/local/. (This particular program can be run directly from the 
user's /home but as a learning experience I want to do it the 'coorect' way)

Now, I don't know if that is the way to do it with python applications. 
I also don't know if a custom install script is the norm. I have seen 
some use of makefiles and tried to find something about it but the 
manual for GNUMake really assume you are familiar with/ using C which 
I'm not. I have googled a lot for this but can't really find anything 
aimed for someone just learning programming with Python.

So my question is; What is the preferred/ common way to install a python 
application so it's not really distro specific? And are there any good 
resources on this on the web?

Thanks
Tina


From charlietaylor at users.sourceforge.net  Tue Jan 23 02:23:20 2007
From: charlietaylor at users.sourceforge.net (charlietaylor)
Date: Tue, 23 Jan 2007 00:23:20 -0700
Subject: ANN: tk_happy, a framework for creating python Tk apps
Message-ID: <20070123002320.1ace5abeb80c198ab3acc3a9bf8d431e.c832e75cd1.wbe@email.secureserver.net>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070123/0bd94060/attachment.html>

From maksim.kasimov at gmail.com  Mon Jan 15 12:14:14 2007
From: maksim.kasimov at gmail.com (Maksim Kasimov)
Date: Mon, 15 Jan 2007 19:14:14 +0200
Subject: __getattr__ equivalent for a module
In-Reply-To: <45abab5e$0$15166$4d3efbfe@news.sover.net>
References: <eog94u$jd4$1@news.lucky.net>
	<45abab5e$0$15166$4d3efbfe@news.sover.net>
Message-ID: <eogcpa$ns0$1@news.lucky.net>


Hi Leif, many thanks - it works

Leif K-Brooks wrote:
> Maksim Kasimov wrote:
>> so my question is: how to tune up a module get default attribute if we 
>> try to get access to not actually exists attribute of a module?
> 
> You could wrap it in an object, but that's a bit of a hack.
> 
> import sys
> 
> class Foo(object):
>     def __init__(self, wrapped):
>         self.wrapped = wrapped
> 
>     def __getattr__(self, name):
>         try:
>             return getattr(self.wrapped, name)
>         except AttributeError:
>             return 'default'
> 
> sys.modules[__name__] = Foo(sys.modules[__name__])


-- 
Maksim Kasimov


From alain.walter at thalesgroup.com  Fri Jan 19 12:49:09 2007
From: alain.walter at thalesgroup.com (awalter1)
Date: 19 Jan 2007 09:49:09 -0800
Subject: monitor the start and end of applications
Message-ID: <1169228949.808574.37250@l53g2000cwa.googlegroups.com>

Hello,
My purpose is to supervise (from a python program) the launch of some
other programs (python or non python programs) as : "I click on the
button X and the pg X is launched ..."
I want also that my supervision be "wake up" when a pg has exited to
check its status or something like that.
I suppose I need to use thread and I did, I'm trying several solutions
(popen, os.system, commands.getstatusoutput, certainly not correctly) :
generally I am able to launch a pg but when it is ended, the thread
"caller" is still waiting.

Is somebody has encountered similar requirements ?
Thanks a lot for your help



From harvey.thomas at informa.com  Fri Jan 19 05:54:17 2007
From: harvey.thomas at informa.com (harvey.thomas at informa.com)
Date: 19 Jan 2007 02:54:17 -0800
Subject: Match 2 words in a line of file
References: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
	<1169166223.073714.109620@51g2000cwl.googlegroups.com>
	<1169172293.938820.103400@51g2000cwl.googlegroups.com>
	<1169172954.107365.133950@51g2000cwl.googlegroups.com>
	<1169175299.490994.244700@51g2000cwl.googlegroups.com>
Message-ID: <1169204056.999939.280660@s34g2000cwa.googlegroups.com>


Rickard Lindberg wrote:

> I see two potential problems with the non regex solutions.
>
> 1) Consider a line: "foo (bar)". When you split it you will only get
> two strings, as split by default only splits the string on white space
> characters. Thus "'bar' in words" will return false, even though bar is
> a word in that line.
>
> 2) If you have a line something like this: "foobar hello" then "'foo'
> in line" will return true, even though foo is not a word (it is part of
> a word).

Here's a solution using re.split:

import re
import StringIO

wordsplit = re.compile('\W+').split
def matchlines(fh, w1, w2):
    w1 = w1.lower()
    w2 = w2.lower()
    for line in fh:
        words = [x.lower() for x in wordsplit(line)]
        if w1 in words and w2 in words:
            print line.rstrip()

test = """1st line of text (not matched)
2nd line of words (not matched)
3rd line (Word test) should match (case insensitivity)
4th line simple test of word's (matches)
5th line simple test of words not found (plural words)
6th line tests produce strange words (no match - plural)
7th line "word test" should find this
"""
matchlines(StringIO.StringIO(test), 'test', 'word')



From dummy at dummy.nl  Fri Jan 19 12:28:02 2007
From: dummy at dummy.nl (Cecil Westerhof)
Date: Fri, 19 Jan 2007 18:28:02 +0100
Subject: Is it possible to fasten the import of cgi?
References: <45af6f47$0$322$e4fe514c@news.xs4all.nl><mailman.2867.1169130619.32031.python-list@python.org>
	<45af8f52$0$339$e4fe514c@news.xs4all.nl>
	<mailman.2876.1169140579.32031.python-list@python.org>
Message-ID: <45b0ffa2$0$338$e4fe514c@news.xs4all.nl>

Gabriel Genellina wrote:

> I'll try to explain better: the cgi *protocol* (I'm not talking about the
> cgi *module*) requires a *new* python process to be created on *each*
> request. Try to measure the time it takes to launch Python, that is, the
> time from when you type `python ENTER` on your shell and the interpreter
> prompt appears. That time is wasted for *every* cgi request, and I bet it
> is much greater than the 95 ms you measure importing a module (be it cgi
> or whatever). You'll gain much more responsiveness if you can switch to
> another protocol, be it FastCGI, WSGI, mod_python or another.

The import of the cgi module takes about 95 milliseconds and the browsers
takes around 260 milliseconds to fetch the xml-page. This is why I thought
it to be important, but I think you are right, I should not worry about
this and switch to another protocol. Is not possible with the current
hosting provider, but I'll switch.
Pointers where to look for in selecting the protocol are apreciated.


> Anyway, comparing the import time between os, sys, and cgi is not very
> meaningful. sys is a builtin module, so "import sys" does very little. os
> is likely to be already imported by the time your script begins, so
> "import os" just verifies that os is already in sys.modules. "import cgi"
> is the only example when Python actually has to load something, so it's
> not a surprise if it takes longer.

Okay, thank you for the explanation.




From ggrp1.20.martineau at dfgh.net  Sat Jan  6 19:49:20 2007
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 6 Jan 2007 16:49:20 -0800
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
	<1168042215.514023.121560@s80g2000cwa.googlegroups.com>
	<1168048620.409190.85870@v33g2000cwv.googlegroups.com>
Message-ID: <1168130960.670978.111850@s34g2000cwa.googlegroups.com>

Carl Banks wrote:

> Martin Miller wrote:
> > ### non-redundant example ###
> > import sys
> >
> > class Pin:
> >     def __init__(self, name, namespace=None):
> >         self.name = name
> >         if namespace == None:
> >             # default to caller's globals
> >             namespace = sys._getframe(1).f_globals
> >         namespace[name] = self
> >
> > Pin('aap')      # create a Pin object named 'aap'
> > Pin('aap2')     # create a Pin object named 'aap2'
> > print aap.name
> > print aap2.name
>
> The problem with this is that it only works for global namespaces,
> while failing silently and subtly if used in a local namespace:

Oh, contrair. It would work fine with local namespaces simply by
overriding the default value of the optional 'namepace' parameter (see
below).

> def fun():
>     Pin('aap')
>     aap1 = aap
>     fun2()
>     aap2 = aap
>     print aap1 is aap2
>
> def fun2():
>     Pin('aap')
>
> If it's your deliberate intention to do it with the global namespace,
> you might as well just use globals() and do it explicitly, rather than
> mucking around with Python frame internals.  (And it doesn't make the
> class unusable for more straightforward uses.)

You could be more explicit by just passing 'globals()' as a second
parameter to the __init__ constructor (which is unnecessary, since
that's effectively the default).

It's not clear to me how the example provided shows the technique
"failing silently and subtly if used in a local namespace" because what
happens is exactly what I would expect if the constructor is called
twice with the same string and defaulted namespace -- namely create
another object and make the existing name refer to it. If one didn't
want the call to Pin in fun2 to do this, just change fun2 to this:

def fun2():
    Pin('aap', locals())

This way the "print aap1 is aap2" statement in fun() would output
"true" since the nested call to Pin would now (explicitly) cause the
name of the new object to be put into fun2's local namespace leaving
the global one created by the call in fun() alone.

Obviously, this was not an objection I anticipated. An important one I
would think is the fact that the current documentation says that
f_globals is a special *read-only* attribute of a frame object implying
that it shouldn't be changed (even though doing so 'works' as my
example illustrates).

I think other valid arguments against this practice might include
whether it's an example of good OOP, or a good programming practice at
all, since it involves possibly subtle side-effects, the use of global
variables, and/or is 'unpythonic'.

Certainly the approach is not without caveats. Despite them, I believe
it can be useful in some contexts, as long as what is going on is
clearly understood. The point of my reply to the OP was mainly just to
illustrate the power and flexibility of Python to the newbie. I guess
to that I should have also added that it gives you "enough rope to
shoot yourself" as Allen Holub said regarding C++.

Cheers,
-Martin



From pink at odahoda.de  Tue Jan 16 04:20:06 2007
From: pink at odahoda.de (Benjamin Niemann)
Date: Tue, 16 Jan 2007 10:20:06 +0100
Subject: html + javascript automations = [mechanize + ?? ] or something
	else?
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
	<1168922805.176693.149060@q2g2000cwa.googlegroups.com>
Message-ID: <eoi5c7$949$1@online.de>

Hello,

John wrote:

> John wrote:
>> I have to write a spyder for a webpage that uses html + javascript. I
>> had it written using mechanize
>> but the authors of the webpage now use a lot of javascript. Mechanize
>> can no longer do the job.
>> Does anyone know how I could automate my spyder to understand
>> javascript? Is there a way
>> to control a browser like firefox from python itself? How about IE?
>> That way, we do not have
>> to go thru something like mechanize?
> 
> I am curious about the webbrowser module. I can open up firefox
> using webbrowser.open(), but can one control it? Say enter a
> login / passwd on a webpage? Send keystrokes to firefox?
> mouse clicks?

Not with the webbrowser module - it can only launch a browser.

On the website of mechanize you will also find DOMForm
<http://wwwsearch.sourceforge.net/DOMForm/>, which is a webscraper with
basic JS support (using the SpiderMonkey engine from the Mozilla project).
But note that DOMForm is in a early state and not developed anymore
(according to the site, never used it myself).

You could try to script IE (perhaps also FF, dunno..) using COM. This can be
done using the pywin32 module <https://sourceforge.net/projects/pywin32/>.
How this is done in detail is a windows issue. You may find help and
documentation in win specific group/mailing list, msdn, ... You can usually
translate the COM calls from VB, C#, ... quite directly to Python.


HTH

-- 
Benjamin Niemann
Email: pink at odahoda dot de
WWW: http://pink.odahoda.de/


From jg307 at cam.ac.uk  Tue Jan  9 05:13:16 2007
From: jg307 at cam.ac.uk (James Graham)
Date: Tue, 09 Jan 2007 10:13:16 +0000
Subject: [ANN] html5lib 0.2
Message-ID: <iYKdnXrPKajY9j7YRVnyuQA@pipex.net>

DESCRIPTION

HTML parsing library based on the WHATWG Web Applications 1.0 "HTML5"
specification[1]. The parser is designed to work with all existing 
flavors of HTML and implements well-defined error recovery that has been 
specified though analysis of the behavior of modern desktop web browsers.

html5lib currently allows parsing to both a custom "simpletree" format 
and to an ElementTree, if available. Future releases will include 
support for at least one DOM implementation, and it is possible to 
implement custom treebuilders although the API should not yet be 
considered stable.

DOWNLOAD

http://html5lib.googlecode.com/files/html5lib-0.2.zip

BUGS

This is the first release of html5lib and it is considered alpha quality 
software. However, it ships with over 230 passing unit tests covering 
most of the specified behavior. Bugs should be reported on the issue 
tracker [2]

KNOWN ISSUES

Error handling does not yet conform to the specification; not all errors 
are reported and the error messages are not informative.

PROJECT PAGE

More information about the project including documentation and 
information on getting involved is available on the project page:
http://code.google.com/p/html5lib/

[1] http://whatwg.org/specs/web-apps/current-work/
[2] http://code.google.com/p/html5lib/issues/list


From nszabolcs at gmail.com  Mon Jan 29 10:01:39 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 29 Jan 2007 07:01:39 -0800
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <7x3b5uwfa2.fsf@ruckus.brouhaha.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<7x3b5uwfa2.fsf@ruckus.brouhaha.com>
Message-ID: <1170082899.639441.246010@a34g2000cwb.googlegroups.com>

> If you don't mind possibly getting a few nonalphanumeric characters:
>
> import os,binascii
> print binascii.b2a_base64(os.urandom(6))

what about

file('/dev/urandom').read(6).encode('base64')

(oneliner and without import as op requested)



From adonis at REMOVETHISearthlink.net  Sun Jan 28 22:47:26 2007
From: adonis at REMOVETHISearthlink.net (Adonis Vargas)
Date: Mon, 29 Jan 2007 03:47:26 GMT
Subject: Convert from unicode chars to HTML entities
In-Reply-To: <d4evh.16383$yx6.12566@newsread2.news.pas.earthlink.net>
References: <pan.2007.01.29.03.05.23.166735@REMOVEME.cybersource.com.au>
	<d4evh.16383$yx6.12566@newsread2.news.pas.earthlink.net>
Message-ID: <i7evh.16385$yx6.473@newsread2.news.pas.earthlink.net>

Adonis Vargas wrote:
[...]
> 
> Its *very* ugly, but im pretty sure you can make it look prettier.
> 
> import htmlentitydefs as entity
> 
> s = u"? and many more..."
> t = ""
> for i in s:
>     if ord(i) in entity.codepoint2name:
>         name = entity.codepoint2name.get(ord(i))
>         entityCode = entity.name2codepoint.get(name)
>         t +="&#" + str(entityCode)
>     else:
>         t += i
> print t
> 
> Hope this helps.
> 
> Adonis

or

import htmlentitydefs as entity

s = u"? and many more..."
t = u""
for i in s:
     if ord(i) in entity.codepoint2name:
         name = entity.codepoint2name.get(ord(i))
         t += "&" + name + ";"
     else:
         t += i
print t

Which I think is what you were looking for.

Adonis


From rweth at cisco.com  Sun Jan  7 04:00:06 2007
From: rweth at cisco.com (rweth)
Date: Sun, 07 Jan 2007 01:00:06 -0800
Subject: How to invoke parent's method?
In-Reply-To: <1168159875.980990@sj-nntpcache-1.cisco.com>
References: <1168138626.574514.102060@i15g2000cwa.googlegroups.com>
	<1168159875.980990@sj-nntpcache-1.cisco.com>
Message-ID: <1168160407.52195@sj-nntpcache-1.cisco.com>

rweth wrote:
> many_years_after wrote:
>> Hi, pythoners:
>>
>>      My wxPython program includes  a panel whose parent is a frame. The
>> panel has a button. When I click the button , I want to let the frame
>> destroy. How to implement it? Could the panel invoke the frame's
>> method?
>> Thanks.
>>
> I think it "could" if what I read recently in:
>    http://www.python.org/download/releases/2.2/descrintro/#cooperation
> Is applicable.
> 
>    Look at the link "Cooperative methods and super"
>    Write a subclass of panel where the target method of it's parent
>    is targX (that parent method of Frame that you want to call)
> 
>      class myPanel (Panel):
>        def dadsX (self):
>           Frame.targX(self)
> 
> 
>     I think you are forced to invoke this within a method of the Class
>     itself, as opposed to doing so with an instance.
> 
> Good luck!
> 
> 
You know I just tried a code fragment and got the parent method to work 
with an instance .. so maybe you don't have to subclass. Here is a 
transcript illustrating the idea:

 >>> class DAD:
...   def methodx(self):
...     print "DAD-methodx"
...
 >>> class SON(DAD):
...   def methodx(self):
...     print "SON-methodx"
...
 >>>
 >>>
 >>> billy = SON()
 >>> billy.methodx()
SON-methodx
 >>> DAD.methodx(billy)
DAD-methodx
 >>>

So you can invoke the DAD.methodx via the billy instance of the object 
.. without subclassing. Now I wonder if this will actually work?
















From ggrp1.20.martineau at dfgh.net  Sun Jan  7 16:01:18 2007
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 7 Jan 2007 13:01:18 -0800
Subject: [OT] (newbie) Is there a way to prevent "name redundancy" in
	OOP ?
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
	<1168042215.514023.121560@s80g2000cwa.googlegroups.com>
	<1168048620.409190.85870@v33g2000cwv.googlegroups.com>
	<1168130960.670978.111850@s34g2000cwa.googlegroups.com>
	<45a12b07$0$300$426a74cc@news.free.fr>
Message-ID: <1168203678.193392.158600@i15g2000cwa.googlegroups.com>

Bruno Desthuilliers wrote:

> Martin Miller a ?crit :
> (snip)
> >
> > Oh, contrair.
>
> I guess you mean "au contraire" ?-)
>
> (snip)

FWIW "contrair" is how it's spelled in the Oxford English dictionary (I
actually did look it up before posting because it seemed like there
ought be an 'e' on the end). The dictionary also says it's chiefly
Scottish but the etymology indicates from the Old French "contraire".

Technically I suppose I should have written "Oh, *on* contrair" or
better yet just "On the contrary". ;-)

-Martin



From george.sakkis at gmail.com  Mon Jan 15 21:36:25 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 15 Jan 2007 18:36:25 -0800
Subject: Class list of a module
References: <OF26C969EB.BAFF11A0-ONC1257264.002723D2-C1257264.0028BCA1@an.cit.alcatel.fr>
	<mailman.2729.1168848415.32031.python-list@python.org>
	<1168850336.276790.73810@38g2000cwa.googlegroups.com>
Message-ID: <1168914985.821811.183300@v45g2000cwv.googlegroups.com>

bearophileHUGS at lycos.com wrote:

> Gabriel Genellina:
> > >import inspect
> > def getClassList(aModule):
> >      return [cls for cls in vars(aModule).itervalues()
> >                      if inspect.isclass(cls)]
>
> This is short enough too:
>
> from inspect import isclass
> getclasses = lambda module: filter(isclass, vars(module).itervalues())
>
> Bye,
> bearophile

Or even:

from inspect import getmembers, isclass
def getclasses(module):
    return [cls for name,cls in getmembers(module,isclass)]

George



From jstroud at mbi.ucla.edu  Wed Jan 31 06:08:02 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 31 Jan 2007 11:08:02 GMT
Subject: data design
In-Reply-To: <mailman.3344.1170239884.32031.python-list@python.org>
References: <45bf5763$0$22792$426a34cc@news.free.fr>	<1170183985.871094.155720@q2g2000cwa.googlegroups.com>	<45bfbcc3$0$30950$426a74cc@news.free.fr>	<1170201274.580256.182740@v45g2000cwv.googlegroups.com>	<epop2g$b2d$1@zinnia.noc.ucla.edu>
	<mailman.3344.1170239884.32031.python-list@python.org>
Message-ID: <mM_vh.57375$wc5.3512@newssvr25.news.prodigy.net>

BJ?rn Lindqvist wrote:
> On 1/31/07, James Stroud <jstroud at mbi.ucla.edu> wrote:
>> [copy_files]
>> files_dir1 = this.file that.file
>> path_dir1 = /some/path
>>
>> files_dir2 = the_other.file yet_another.file
>> path_dir2 = /some/other/path
>>
>> In yaml, it might look thus.
>>
>> copy_files :
>>       - files : [this.file, that.file]
>>         path  : /some/path
>>       - files : [the_other.file, yet_another.file]
>>         path  : /some/other/path
>>
>> Both are readable (though I like equals signs in appearance over
>> colons), but yaml doesn't require a lot of string processing to group
>> the files with the paths. I don't even want to think the coding
>> gymnastics required to split all of the option names and then group
>> those with common suffixes.
> 
> But is not that a perfect world example? Consider:
> 
> [copy_files]
> files_dir1=this.file that.file
> path_dir1=/some/path
> files_dir2=the_other.file yet_another.file
> path_dir2=/some/other/path
> 
> versus:
> 
> copy_files:
> -files:[this.file,that.file]
> path:/some/path
> -files:[the_other.file,yet_another.file]
> path:/some/other/path
> 
> Mandatory indentation is good in programming languages, but does it
> really belong in configuration files? With tabs verboten to boot.
> 

I'm not sure whether to agree with you or disagree with you. My 
conclusion is that if it is at all possible, try to use an ini file, 
even if you have to stretch your imagination a bit. More complex formats 
are prone to one's assigning some imperative meaning to the structure 
(as I am doing with my example, which might make it a bad one). However, 
these more complex formats can intensely useful for (1) knowledgeable 
people with (2) complicated data.


From gandalf at designaproduct.biz  Tue Jan  9 05:19:15 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Tue, 09 Jan 2007 11:19:15 +0100
Subject: A simple array in Python
In-Reply-To: <1168337391.770307.54750@11g2000cwr.googlegroups.com>
References: <1168337391.770307.54750@11g2000cwr.googlegroups.com>
Message-ID: <45A36C23.2030007@designaproduct.biz>

bg_ie at yahoo.com wrote:
> Hi,
>
> I have the following enum -
>
> class State:
> 	Fire = 0
> 	Water = 1
> 	Earth = 2
>
> And I want a variable which holds a value for each of these states,
> something like -
>   

class State:
	Fire = 0
	Water = 1
	Earth = 2


myState = {} # It is a dictionary, see 
http://docs.python.org/tut/node7.html#SECTION007500000000000000000
myState[State.Fire] = 20
myState[State.Earth] = 24
print myState

{0: 20, 2: 24}




From pavlovevidence at gmail.com  Fri Jan  5 00:28:27 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 4 Jan 2007 21:28:27 -0800
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
Message-ID: <1167974907.497878.61070@i15g2000cwa.googlegroups.com>

jeremito wrote:
> I am writing a class that is intended to be subclassed.  What is the
> proper way to indicate that a sub class must override a method?

You can't (easily).

If your subclass doesn't override a method, then you'll get a big fat
AttributeError when someone tries to call it.  But this doesn't stop
someone from defining a subclass that fails to override the method.
Only when it's called will the error show up.  You can, as others have
noted, define a method that raises NotImplementedError.  But this still
doesn't stop someone from defining a subclass that fails to override
the method.  The error still only occurs when the method is called.

There are some advantages to using NotImplementedError:

1. It documents the fact that a method needs to be overridden
2. It lets tools such as pylint know that this is an abstract method
3. It results in a more informative error message

But, in the end, if someone wants to define a class that defiantly
refuses to declare a method, you can't stop them.


Carl Banks



From ironfroggy at gmail.com  Mon Jan 15 22:21:31 2007
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Mon, 15 Jan 2007 22:21:31 -0500
Subject: assert versus print [was Re: The curious behavior of integer
	objects]
In-Reply-To: <pan.2007.01.16.03.11.02.326034@REMOVEME.cybersource.com.au>
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
	<mailman.2744.1168901460.32031.python-list@python.org>
	<pan.2007.01.16.02.07.39.523409@REMOVEME.cybersource.com.au>
	<mailman.2761.1168915131.32031.python-list@python.org>
	<pan.2007.01.16.03.11.02.326034@REMOVEME.cybersource.com.au>
Message-ID: <76fd5acf0701151921m7932cb82u638bbbb002d7b670@mail.gmail.com>

On 1/15/07, Steven D'Aprano <steve at removeme.cybersource.com.au> wrote:
> On Mon, 15 Jan 2007 21:38:42 -0500, Calvin Spealman wrote:
>
> > On 1/15/07, Steven D'Aprano <steve at removeme.cybersource.com.au> wrote:
> >> On Mon, 15 Jan 2007 17:50:56 -0500, Calvin Spealman wrote:
> >>
> >> > assert foo(0x10) == 0  # Assertions are much better tests than prints :-)
> >>
> >> I dispute that assertion (pun intended).
> >
> > Hah!
> >
> >> Firstly, print statements work even if you pass the -O (optimize) flag
> >> to Python. Your asserts don't.
> >
> > This is true, but the concept can be adapted to a things like an
> > assert_() function.
>
> Hence defeating the optimization :)
>
> So what you're saying is, some custom function that you write yourself is
> better than print? I suppose I can't argue with that :)
>
>
> >> Secondly, a bare assertion like that gives you very little information:
> >> it just tells you that it failed:
> >>
> >> >>> x = 1
> >> >>> assert x == 0
> >> Traceback (most recent call last):
> >>   File "<stdin>", line 1, in ?
> >> AssertionError
> >>
> >> To provide the same information that print provides, you need something
> >> like this:
> >>
> >> assert x == 0, "x == %s not 0" % x
> >
> > What information would I need to know if my test passed? Nothing, I say.
>
> Maybe. But then it is hard to tell the difference between "my test
> function printed nothing because it is broken, and my test function
> printed nothing because it succeeded".
>
> There are good arguments both for and against successful tests printing a
> result. Keep in mind that a successful assert doesn't actually print
> "nothing" in the interactive interpreter: when it completes, you do get
> feedback because Python prints a prompt. Getting feedback that the test
> completed successfully is vital. The only question is whether that
> feedback should be minimal or verbose.
>
> But in any case, you have misunderstood the assertion. The error message
> is printed *if the assert fails*, not if it passes.
>
>
> > I only want to know when the tests fail, especially as I add more of
> > them. Having no output is a great way to know nothing puked.
>
> Sure -- for unit testing. For interactive exploration, seeing the value of
> a variable is better than guessing. That's why a bare object reference in
> the interactive interpreter prints itself, but in a script does nothing.

1) I was trying to nudge the OP towards unit testing
2) if you look at the printed verson of an object you are as much
guessing as you would with an assert and no output
3) It was just an arbitrary statement and although I stand by it, is
it worth this much discussion?

> --
> Steven D'Aprano
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From gagsl-py at yahoo.com.ar  Wed Jan 24 00:06:59 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 24 Jan 2007 02:06:59 -0300
Subject: newbie question: ftp.storbinary()
References: <BAY119-F308650E60A44C911FD66C7C4AD0@phx.gbl>
Message-ID: <ep6pmf$mm$1@sea.gmane.org>

"Scott Ballard" <scottballard at hotmail.com> escribi? en el mensaje 
news:BAY119-F308650E60A44C911FD66C7C4AD0 at phx.gbl...

> Sorry for the lame question, I'm still trying to pick up Python and new to
> the list here.
It's not a lame question...

> Question:
> I'm trying to write a python script that will access an FTP site and 
> upload
> some files. I've gotten everything working except for the actual uploading
> of the files.
>
> I'm assuming that  I should use storbinary( command, file[, blocksize]) to
> transfer the files. the documentation says "command should be an 
> appropriate
> "STOR" command: "STOR filename"."
>
> I can't seem to figure out an `appropriate "STOR" command' is???
The ftplib is perhaps too low level in this regard. There are a few 
variants: STOR, STOU, APPE. Try Google, or go right into the official 
specification, RFC959.
http://www.faqs.org/rfcs/rfc959.html (specially section 4.1, FTP Commands).
The example command above "STOR filename" will upload the file (the second 
argument to storbinary) overwriting without prompt any previous file with 
the same name (if it existed).

-- 
Gabriel Genellina 




From antonyliu2002 at yahoo.com  Fri Jan  5 01:09:38 2007
From: antonyliu2002 at yahoo.com (antonyliu2002 at yahoo.com)
Date: 4 Jan 2007 22:09:38 -0800
Subject: Undefined symbol __pure_virtual when importing MySQLdb
Message-ID: <1167977378.425615.220350@51g2000cwl.googlegroups.com>

I downloaded MySQL-python-1.2.1 from SourceForge and installed it on a
Mandrake system (Mandrake Linux 9.2 3.3.1-2mdk on linux2).

The installation was successful.  The gcc version is 3.3.

My Python version is 2.4.2.  When I import MySQLdb, I get an error
which says that __pure_virtual is an undefined symbol.

Look:

>>> import MySQLdb
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/python2.4/site-packages/MySQLdb/__init__.py", line
19, in ?
    import _mysql
ImportError: /usr/local/python2.4/site-packages/_mysql.so: undefined
symbol: __pure_virtual

By the way, mysql (5.0.27-standard)is running OK on the Mandrake
system. Look:

[antonyliu at myhost antonyliu]$ mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 13 to server version: 5.0.27-standard

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql>

I have googled hard, and did see someone asking the same question, but
haven't found a good solution to this problem.  Could anyone give me a
hint?  Thanks a lot!



From horpner at yahoo.com  Thu Jan  4 11:23:35 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 4 Jan 2007 17:23:35 +0100
Subject: Sorting on multiple values, some ascending, some descending
References: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
Message-ID: <slrnepqajt.t4.horpner@FIAD06.norwich.edu>

On 2007-01-03, dwelden <dwoogle at gmail.com> wrote:
> I have successfully used the sort lambda construct described in
> http://mail.python.org/pipermail/python-list/2006-April/377443.html.
> However, how do I take it one step further such that some
> values can be sorted ascending and others descending? Easy
> enough if the sort values are numeric (just negate the value),
> but what about text?
>
> Is the only option to define an external sorting function to
> loop through the list and perform the comparisons one value at
> a time?

Another trick is to factor the key application out of the sort.
This may be a good idea if when you want to minimize the number
of times your key function is called.

The idea is to mangle the list temporarily so you can use an
unkeyed sort, and then unmangle the sorted data. Here's a silly
example using a phone directory that's not stored in a format
that's easy to sort.

>>> a = [("Neil Cerutti", "8025552954"), ("Ted Smith", "8025552281"), ("Barny Fife", "8025551105")]
>>> b = [(" ".join(reversed(x.split())), y) for (x, y) in a]
>>> b
[('Cerutti Neil', '8025552954'), ('Smith Ted', '8025552281'), ('Fife Barny', '8025551105')]
>>> b.sort()
>>> b
[('Cerutti Neil', '8025552954'), ('Fife Barny', '8025551105'), ('Smith Ted', '8025552281')]
>>> a = [(" ".join(reversed(x.split())), y) for (x, y) in b]
>>> a
[('Neil Cerutti', '8025552954'), ('Barny Fife', '8025551105'), ('Ted Smith', '8025552281')]

-- 
Neil Cerutti
Eddie Robinson is about one word: winning and losing. --Eddie Robinson's agent
Paul Collier


From carsten at uniqsys.com  Wed Jan  3 09:47:44 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 03 Jan 2007 09:47:44 -0500
Subject: function without brackets ?
In-Reply-To: <57668$459bbf95$d443bb3a$16218@news.speedlinq.nl>
References: <57668$459bbf95$d443bb3a$16218@news.speedlinq.nl>
Message-ID: <1167835664.3391.6.camel@dot.uniqsys.com>

On Wed, 2007-01-03 at 15:37 +0100, Stef Mientki wrote:
> If I call a parameterless function without brackets at the end,
> the function is not performed, but ...
> I don't get an error message ???
> 
> Is this normal  behavior ?

Yes. If you "call" a function without brackets, it's not a call.

Remember that functions are first class objects that can be passed
around like any other object. Hence, Python needs the distinction
between

x = foo() # Assign the *result* of calling foo to x

and

x = foo # Assign the *function* foo itself to x.

You don't get an error message because a function name without
parentheses is a valid expression that refers to that function.

Hope this helps,

Carsten.




From Thomas.Ploch at gmx.net  Sun Jan  7 09:52:00 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sun, 07 Jan 2007 15:52:00 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <slrneq2055.tcj.grahn+nntp@frailea.sa.invalid>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>	<mailman.2383.1168131242.32031.python-list@python.org>	<7xd55rzke9.fsf@ruckus.brouhaha.com>
	<slrneq2055.tcj.grahn+nntp@frailea.sa.invalid>
Message-ID: <45A10910.7010107@gmx.net>

Jorgen Grahn schrieb:
> On 06 Jan 2007 17:38:06 -0800, Paul Rubin <http> wrote:
>> "BJ?rn Lindqvist" <bjourne at gmail.com> writes:
>>> It is given that emphasizing private data (encapsulation) leads to
>>> more internal complexity and more lines of code because you have to
>>> write getters and setters and stuff.
>> You can have public variables in Java if you choose to.  Writing
>> private variables with public setters and getters is just a style choice.
> 
> Privates with getters/setters are (as I think someone else hinted) pretty
> pointless. The interesting stuff is the private data that *is* private, i.e.
> not meant for users at all.

Not really pointless, since you can hide your data structures that you
don't want to be fiddled around with (which for me is almost the only
point to use it).

> But yes, I don't mind not having 'private:' in Python. I don't have
> compile-time type checking anyway. In fact, I don't always know what the
> attributes of my objects /are/ until runtime.

Me neither, although I have to say that the '__' prefix comes pretty
close to being 'private' already. It depends on the definition of
private. For me, private means 'not accessible from outside the
module/class'.

Thomas



From ng6 at padowan.dk  Thu Jan 11 17:49:45 2007
From: ng6 at padowan.dk (Ivan Johansen)
Date: Thu, 11 Jan 2007 23:49:45 +0100
Subject: Embedding Python with Tkinter
Message-ID: <45a6bf07$0$2084$edfadb0f@dtext02.news.tele.dk>

I have written a Windows GUI application in C++ and I would like to 
embed Python into the application to enable users to write plugins.

The problem is when the plugin tries to use Tkinter. Tkinter creates its 
own root window, which I remove by calling:
root = Tk()
root.withdraw()

But when I create a new dialog with Tkinter, I have to create it without 
a parent, which causes it to be shown in the task bar and I cannot make 
it modal. Does anyone know how to create a Tkinter window as a child of 
a window that was not created by Tkinter?

Ivan Johansen


From mail at microcorp.co.za  Mon Jan  8 06:11:14 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 8 Jan 2007 13:11:14 +0200
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com><ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net><7x7ivz88af.fsf@ruckus.brouhaha.com><mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
Message-ID: <01f701c73316$3c945680$03000080@hendrik>

"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote:

> If you want to write bug-free code, pessimism is the name of the game.

A healthy touch of paranoia does not come amiss either...

And even then things foul up in strange ways because your head
is never quite literal enough.

When you hear a programmer use the word "probability" -
then its time to fire him, as in programming even the lowest 
probability is a certainty when you are doing millions of 
things a second.

But this is off topic, really - I don't think that hiding things make 
much difference, especially as the python hiding is not absolute.

- Hendrik




From tactics40 at gmail.com  Wed Jan 10 16:37:33 2007
From: tactics40 at gmail.com (tac-tics)
Date: 10 Jan 2007 13:37:33 -0800
Subject: Question about compiling.
In-Reply-To: <87ac0qy5a6.fsf@smsnet.pl>
References: <Pine.LNX.4.64.0701091253500.25764@saturn.syslang.net>
	<mailman.2520.1168421522.32031.python-list@python.org>
	<87ac0qy5a6.fsf@smsnet.pl>
Message-ID: <1168465053.243581.166220@k58g2000hse.googlegroups.com>

> That's not the whole truth. :)

The whole truth is that from a developer's POV, .pyc files are
unimportant.



From heikki at osafoundation.org  Fri Jan 19 14:24:30 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 19 Jan 2007 11:24:30 -0800
Subject: More M2Crypto issues
In-Reply-To: <6u7sh.264$4H1.150@newssvr17.news.prodigy.net>
References: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>
	<mailman.2887.1169173756.32031.python-list@python.org>
	<6u7sh.264$4H1.150@newssvr17.news.prodigy.net>
Message-ID: <L_6dnVPmutZyhyzYnZ2dnUVZ_tSdnZ2d@comcast.com>

John Nagle wrote:
>     Actually, at the moment I'm having an M2Crypto problem related
> to a SWIG/OpenSSL conflict.  Older versions of OpenSSL have an
> include file that needs __i386__ defined, which is something GCC
> does based on what platform you're on.  SWIG uses CPP, but
> doesn't set the platform defines, so the SWIG phase of the
> M2Crypto build fails.  I'm currently trying to get the shared
> host where that build took place upgraded to a later version of
> OpenSSL, but that requires a server restart, so it may take
> a few days.  I'm doing something that requires M2Crypto to
> run on a range of machines, which turns out to be rather harder
> than expected.

Which version of OpenSSL is that?

-- 
  Heikki Toivonen


From haraldarminmassa at gmail.com  Sat Jan  6 17:46:49 2007
From: haraldarminmassa at gmail.com (GHUM)
Date: 6 Jan 2007 14:46:49 -0800
Subject: sheeps be carefull of Python
Message-ID: <1168123609.117003.310180@v33g2000cwv.googlegroups.com>

sometimes Python is more dangerous than documented:

http://news.nationalgeographic.com/news/2006/09/060915-python-ewe.html


Harald



From mail at microcorp.co.za  Wed Jan 10 02:33:05 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 10 Jan 2007 09:33:05 +0200
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com><ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net><7x7ivz88af.fsf@ruckus.brouhaha.com><mailman.2385.1168171076.32031.python-list@python.org><7xmz4v11jq.fsf@ruckus.brouhaha.com><mailman.2414.1168264117.32031.python-list@python.org><pan.2007.01.08.22.24.34.419033@REMOVE.THIS.cybersource.com.au><mailman.2474.1168332187.32031.python-list@python.org>
	<pan.2007.01.09.15.26.50.282717@REMOVE.THIS.cybersource.com.au>
Message-ID: <019e01c7348c$1cae4fc0$03000080@hendrik>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> wrote:

> On Tue, 09 Jan 2007 10:27:56 +0200, Hendrik van Rooyen wrote:
>
> > "Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> wrote:
> >
> >
> >> On Mon, 08 Jan 2007 13:11:14 +0200, Hendrik van Rooyen wrote:
> >>
> >> > When you hear a programmer use the word "probability" -
> >> > then its time to fire him, as in programming even the lowest
> >> > probability is a certainty when you are doing millions of
> >> > things a second.
> >>
> >> That is total and utter nonsense and displays the most appalling
> >> misunderstanding of probability, not to mention a shocking lack of common
> >> sense.
> >
> > Really?
> >
> > Strong words.
> >
> > If you don't understand you need merely ask, so let me elucidate:
> >
> > If there is some small chance of something occurring at run time that can
> > cause code to fail - a "low probability" in all the accepted senses of the
> > word - and a programmer declaims - "There is such a low probability of
> > that occurring and its so difficult to cater for that I won't bother"
> > - then am I supposed to congratulate him on his wisdom and outstanding
> > common sense?
> >
> > Hardly. - If anything can go wrong, it will. - to paraphrase Murphy's law.
> >
> > To illustrate:
> > If there is one place in any piece of code that is critical and not
protected,
> > even if its in a relatively rarely called routine, then because of the high
> > speed of operations, and the fact that time is essentially infinite,
>
> Time is essentially infinite? Do you really expect your code will still be
> in use fifty years from now, let alone a billion years?

My code does not suffer from bit rot, so it should outlast the hardware...

But seriously - for the sort of mistakes we make as programmers - it does
not actually need infinite time for the lightning to strike - most things that
will actually run overnight are probably stable - and if it takes say a week
of running for the bug to raise its head - it is normally a very difficult
problem to find and fix. A case in point - One of my first postings to
this newsgroup concerned an intermittent failure on a serial port - It was
never resolved in a satisfactory manner - eventually I followed my gut
feel, made some changes, and it seems to have gone away - but I expect
it to bite me anytime - I don't actually *know* that its fixed, and there is
not, as a corollary to your sum below here, any real way to know for
certain.

>
> I know flowcharts have fallen out of favour in IT, and rightly so -- they
> don't model modern programming techniques very well, simply because modern
> programming techniques would lead to a chart far too big to be practical.

I actually like drawing data flow diagrams, even if they are sketchy, primitive
ones, to try to model the inter process communications (where a "process"
may be just a python thread) - I find it useful to keep an overall perspective.

> But for the sake of the exercise, imagine a simplified flowchart of some
> program, one with a mere five components, such that one could take any of
> the following paths through the program:
>
> START -> A -> B -> C -> D -> E
> START -> A -> C -> B -> D -> E
> START -> A -> C -> D -> B -> E
> ...
> START -> E -> D -> C -> B -> A
>
> There are 5! (five factorial) = 120 possible paths through the program.
>
> Now imagine one where there are just fifty components, still quite a
> small program, giving 50! = 3e64 possible paths. Now suppose that there is
> a bug that results from following just one of those paths. That would
> match your description of "lowest probability" -- any lower and it would
> be zero.
>
> If all of the paths are equally likely to be taken, and the program takes
> a billion different paths each millisecond, on average it would take about
> 1.5e55 milliseconds to hit the bug -- or about 5e44 YEARS of continual
> usage. If every person on Earth did nothing but run this program 24/7, it
> would still take on average almost sixty million billion billion billion
> years to discover the bug.

In something with just 50 components it is, I believe, better to try to
inspect the quality in, than to hope that random testing will show up
errors - But I suppose this is all about design, and about avoiding
doing known no - nos.

>
> But of course in reality some paths are more likely than others. If the
> bug happens to exist in a path that is executed often, or if it exists
> in many paths, then the bug will be found quickly. On the other hand, if
> the bug is in a path that is rarely executed, your buggy program may be
> more reliable than the hardware you run it on. (Cynics may say that isn't
> hard.)

Oh I am of the opposite conviction - Like the fellow of the Circuit Cellar
I forget his name ( Steve Circia (?) ) who said:  "My favourite Programming
Language is Solder"... I find that when I start blaming the hardware
for something that is going wrong, I am seldom right...

And this is true also for hardware that we make ourselves, that one would
expect to be buggy, because it is new and untested.  It is almost as if the
tools used in hardware design are somehow less buggy than a programmer's
fumbling attempts at producing something logical.

>
> You're project manager for the development team. Your lead developer tells
> you that he knows this bug exists (never mind how, he's very clever) and
> that the probability of reaching that bug in use is about 3e-64.

This is too convenient - This lead developer is about as likely as
my infinite time...

>
> If it were easy to fix, the developer wouldn't even have mentioned it.
> This is a really hard bug to fix, it's going to require some major
> changes to the program, maybe even a complete re-think of the program.
> Removing this bug could even introduce dozens, hundreds of new bugs.
>
> So okay Mister Project Manager. What do you do? Do you sack the developer,
> like you said? How many dozens or hundreds of man-hours are you prepared
> to put into this? If the money is coming out of your pocket, how much are
> you willing to spend to fix this bug?
>

Do a design review, Put in a man with some experience,
and hope for the best - in reality what else can you do, short
of trying to do it all yourself?

>
> [snip]
>
> > How is this a misunderstanding of probability?  - probability applies to
> > any one trial, so in a series of trials, when the number of trials is
> > large enough - in the
> > order of the inverse of the probability, then ones expectation must be
> > that the rare occurrence should occur...
>
> "Even the lowest probability is a certainty" is mathematically nonsense:
> it just isn't true -- no matter how many iterations, the probability is
> always a little less than one. And you paper over a hole in your argument
> with "when the number of trials is large enough" -- if the probability is
> small enough, "large enough" could be unimaginably huge indeed.

*grin* sure - this is not the maths tripos...

But I am willing to lay a bet, that over an evening's play at roulette, the
red will come up at least once.  I would expect to win too.

>
> Or, to put it another way, while anything with a non-zero probability
> _might_ happen (you might drop a can of soft drink on your computer,
> shorting it out and _just by chance_ causing it to fire off a perfectly
> formatted email containing a poem about penguins) we are justified in
> writing off small enough probabilities as negligible. It's not that they
> can't happen, but the chances of doing so are so small that we can rightly
> expect to never see them happen.

I promise I won't hold my breath...

<joke>
Man inspecting the work of a bunch of monkeys with Keyboards:

"Hey Harry - I think we might have something here - check this:

To be, or not to be, that is the iuuiihiuweriopuqewt"

<end joke>

>
> You might like to read up on Borel's "Law" (not really a law at all,
> really just a heuristic for judging when probabilities are negligible).
> Avoid the nonsense written about Borel and his guideline by Young Earth
> Creationists, they have given him an undeserved bad name.
>
> http://www.talkorigins.org/faqs/abioprob/borelfaq.html
>
ok will have a look later

8<--------------

> > Now how does all this show a shocking lack of common sense?
>
> You pay no attention to the economics of programming. Programming doesn't
> come for free. It is always a trade-off for the best result with the least
> effort. Any time people start making absolute claims about fixing every
> possible bug, no matter how obscure or unlikely or how much work it will
> take, I know that they aren't paying for the work to be done.

Too much assumption from too little data.  Have actually been the part owner
of a small company for the last two decades or so  - I am paying, all right,
I am paying, and paying...

Which maybe is why I want perfection...

- Hendrik




From removethis.kartic.krishnamurthy at gmail.com  Mon Jan 29 13:56:09 2007
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Mon, 29 Jan 2007 18:56:09 GMT
Subject: Sourcing Python Developers
Message-ID: <45BE4348.9020500@gmail.com>

Hello,

My company has quite a few opening involving python expertise. We are 
always looking for python resources (and find it difficult filling these 
positions, might I add). Is there any place to find developers' resumes 
(like finding jobs from http://python.org/community/jobs/)? If any one 
knows of a resume repository (other than Monster, Dice, 
Costs-an-arm-and-leg job site) please share.

In any case, we have immediate requirements for a Pythonista with C++, 
MySQL, XML, Debian expertise. Please email resume to: 
python-resumes(at)temporaryforwarding.com

Thank you,
--Kartic


From dizzydd44 at hotmail.com  Wed Jan  3 00:12:35 2007
From: dizzydd44 at hotmail.com (Dave Dean)
Date: Wed, 03 Jan 2007 05:12:35 GMT
Subject: Iterate through list two items at a time
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
Message-ID: <7XGmh.28517$hI.25073@newssvr11.news.prodigy.net>

Thanks for all the fast responses.  I'm particularly a fan of the zip
method, followed closely by the xrange example.  All, of course, are a lot
of help!
Thanks,
Dave




From john.pye at gmail.com  Mon Jan  8 18:38:24 2007
From: john.pye at gmail.com (John Pye)
Date: 8 Jan 2007 15:38:24 -0800
Subject: error with "import md5"
Message-ID: <1168299504.482909.246970@q40g2000cwq.googlegroups.com>

Hi all,

I'm doing some convoluted stuff with running a python script from
inside a shared library that's running inside a Tcl/Tk interpreter.

It's all been going surprisingly well, up until the point where my
Python script attempts to import matplotlib, which includes a reference
to import md5:

I get this error bubbling through:

Traceback (most recent call last):
  File "/home/john/ascend/models/johnpye/extpy/extpytest.py", line 5,
in ?
    import matplotlib;
  File "/usr/lib/python2.4/site-packages/matplotlib/__init__.py", line
150, in ?
    import md5, os, re, shutil, sys, warnings
ImportError: /usr/lib/python2.4/lib-dynload/md5.so: undefined symbol:
_Py_NoneStruct

Is it possible that this could be a bug in the md5 library (Python
2.4.4c1), or does it look like a problem perhaps with RTDL_NOW |
RTDL_LAZY stuff?

Cheers
JP



From dickey at saltmine.radix.net  Fri Jan 26 19:03:38 2007
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Sat, 27 Jan 2007 00:03:38 -0000
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
	<45ba50c7$0$31432$426a74cc@news.free.fr>
	<slrnerks72.jc.horpner@FIAD06.norwich.edu>
Message-ID: <12rl5mq4nnqoea0@corp.supernews.com>

Neil Cerutti <horpner at yahoo.com> wrote:

> I don't really expect it to work, but if anything will, that is
> it. Curses supports only ASCII and a some special symbol codes
> defined by curses.

un - no.  Curses supports whatever the flavor of curses you have does.
Often that's the 8-bit flavor of ncurses, but the limitation is definitely
in the python configuration.

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From sebastian_busch at gmx.net  Sun Jan  7 04:20:21 2007
From: sebastian_busch at gmx.net (Sebastian Busch)
Date: Sun, 07 Jan 2007 10:20:21 +0100
Subject: where is python on linux?
In-Reply-To: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
References: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
Message-ID: <enqe0c$ahv$1@news.lrz-muenchen.de>

Frank Potter wrote:
> ... where is the executable python file? ...

does

whereis python

tell you what you want to know?
sebastian.


From jmfbahciv at aol.com  Wed Jan 10 11:22:19 2007
From: jmfbahciv at aol.com (jmfbahciv at aol.com)
Date: Wed, 10 Jan 07 16:22:19 GMT
Subject: Internet Survey
References: <1168354695.334946.157400@51g2000cwl.googlegroups.com>
	<N6Uoh.43209$wc5.29633@newssvr25.news.prodigy.net>
	<eo2t6h$8qk_014@s808.apx1.sbo.ma.dialup.rcn.com>
	<0001HW.C1CA63B1059BC980F0203648@news.verizon.net>
Message-ID: <eo33rr$8ss_008@s1005.apx1.sbo.ma.dialup.rcn.com>

In article <0001HW.C1CA63B1059BC980F0203648 at news.verizon.net>,
   Lefty Bigfoot <nunya at busyness.info> wrote:
>On Wed, 10 Jan 2007 08:28:33 -0600, jmfbahciv at aol.com wrote
>(in article <eo2t6h$8qk_014 at s808.apx1.sbo.ma.dialup.rcn.com>):
>
>> In article <N6Uoh.43209$wc5.29633 at newssvr25.news.prodigy.net>,
>>    "Elan Magavi" <Elan at nomailnospam.com> wrote:
>>> Is that like.. OctaPussy?
>> 
>> I didn't read their stuff.  Are they really trying to put a 
>> round peg in a square hole?
>
>Sounds more like an octagonal pole in a round hole.

Nah, I figured they picked the word octal because it's never
been used before.....

/BAH


From aahz at pythoncraft.com  Fri Jan 19 16:12:12 2007
From: aahz at pythoncraft.com (Aahz)
Date: 19 Jan 2007 13:12:12 -0800
Subject: OT Annoying Habits (Was: when format strings attack)
References: <mailman.2916.1169240529.32031.python-list@python.org>
Message-ID: <eorc7c$svk$1@panix3.panix.com>

In article <mailman.2916.1169240529.32031.python-list at python.org>,
Carroll, Barry <Barry.Carroll at psc.com> wrote:
>
>Personally, I don't think top-posting is the most annoying newsgroup
>habit.  I think it's making a big fuss about minor inconveniences. =20

Thing is, nobody will ignore your posts for following standard Usenet
conventions, but some of us will definitely ignore your posts if you
don't.  It's your choice how much attention you want.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From rw at smsnet.pl  Sun Jan 28 13:18:06 2007
From: rw at smsnet.pl (Rob Wolfe)
Date: Sun, 28 Jan 2007 19:18:06 +0100
Subject: string byte dump
References: <9609c$45bce423$d8a87c2a$8428@NEXICOM.NET>
Message-ID: <874pqb9fs1.fsf@smsnet.pl>

Jammer <ask.me at mail.com> writes:

> Does anyone that knows python want to write me a byte dump for strings? :-)
>
> I am trying to modify a plugin (that someone else wrote) that uses
> interprocess communication.
> It works on strings without special characters but it fails on other
> stings like "Bj?rk".
>
> It calls decode('utf8') but I guess the strings are not utf8 so I need
> to find out what is being input.

Try this:

>>> "abc".encode("hex")
'616263'

-- 
HTH,
Rob


From bearophileHUGS at lycos.com  Sat Jan 13 08:12:40 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 13 Jan 2007 05:12:40 -0800
Subject: AlphaBeta Search
In-Reply-To: <1168649650.163717.263240@38g2000cwa.googlegroups.com>
References: <1168649650.163717.263240@38g2000cwa.googlegroups.com>
Message-ID: <1168693959.611167.80050@s34g2000cwa.googlegroups.com>

Chris wrote:
> I know this probably seems trivial, but I can't seem to find the bug in
> my alphabeta search implementation.

This is another alphabeta implementation (all the nicest algorithms are
inside this AIMA codebase):
http://aima.cs.berkeley.edu/python/games.html

Later when you program works you can find this helpful to improve your
algorithm:
http://citeseer.ist.psu.edu/11954.html

Bye,
bearophile



From vinay_sajip at yahoo.co.uk  Sun Jan 21 11:01:16 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: 21 Jan 2007 08:01:16 -0800
Subject: selective logger disable/enable
In-Reply-To: <1169349399.938121.238430@38g2000cwa.googlegroups.com>
References: <1169190498.593059.238150@q2g2000cwa.googlegroups.com>
	<1169204564.348768.186900@38g2000cwa.googlegroups.com>
	<1169349399.938121.238430@38g2000cwa.googlegroups.com>
Message-ID: <1169395276.181654.160810@a75g2000cwd.googlegroups.com>

Gary Jefferson wrote:

> Thanks for the reply Vinay.  I had been reading those docs prior to
> posting, but addFilter/removeFilter only work on individual logger
> instances and handlers.  I want to globally enable/disable multiple
> logger instances, based on their namespaces (see the example I
> provided).  I cannot find a way to do this.  I can certainly call
> addFilter on every instance of every logger throughout the source code,
> but this is more than inconvenient -- it breaks when new modules are
> added with their own loggers in their own namespaces (until fixed by
> manually adding addFilter() to those instances).
>
> e.g., suppose you have a source tree with a several components that do
> network access, and several components that do other things like saving
> state to disk, accessing the filesystem, etc.  And suppose you find a
> bug that you think is in the networking code.  It would be nice to be
> able to GLOBALLY enable just the loggers that belong in the networking
> namespace, and disable all others (similar to how Filters are supposed
> to work for individual loggers).  And then to be able to do this with
> any component, by providing, for example, a command line switch or
> environment variable.  Otherwise, the poor programmer is forced to go
> and edit every module in the source tree to selectively turn on/off
> their respecitve loggers.  Or am I missing something really obvious
> about how this is done with the logging module?

I don't know enough about your target environment and application to
necessarily give you the best advice, but I'll make some general
comments which I hope are useful. You seem to be thinking that loggers
are binary - i.e. you turn them on or off. But they can be controlled
more finely than that; you should be able to get the effect that you
want by using the different logging levels available judiciously, as
well as using the fact that loggers inhabit a named hierarchy. Note
that loggers, by default, inherit the level of the first ancestor
logger which has an explicitly set level (by ancestor, I mean in the
name hierarchy). The root logger's default level is WARNING, so by
default all loggers will work at this level. [N.B. You can also set
levels for individual handlers, e.g. to ensure that only CRITICAL
conditions are emailed to a specified email address using SMTPHandler,
or that ERROR conditions and above are written to file but not to
console.]

So, for your networking scenario, let's suppose you do the following:
Have all network loggers live in the hierarchy namespace below
"network" (e.g. "network", "network.tcp", "network.http" etc.). By
default, all of these will only log events of severity WARNING and
above. Also, suppose you log events in your application code, which are
sometimes but not always of interest, at level DEBUG or level INFO.
Then, these events will never show up in the logging output, since they
are below WARNING in severity. Subsequently, if you want to turn on
logging verbosity for the network code only, you can arrange, via a
command-line switch or environment variable or configuration file, to
do

logging.getLogger("network").setLevel(logging.DEBUG)

whereupon you will start seeing events from the networking code at
severity DEBUG and INFO. This will affect all loggers in the "network"
hierarchy whose levels you have not explicitly set (so that they will
get the effective level of the first ancestor which has a level
explicitly set - the logger named "network").

If all you are interested in is turning on verbosity based on different
event severities (levels), you should not need to use or set Filters.
Filters are for use only when levels don't meet your use case
requirements.

Best regards,

Vinay Sajip



From hg at nospam.org  Mon Jan 15 04:36:35 2007
From: hg at nospam.org (hg)
Date: Mon, 15 Jan 2007 10:36:35 +0100
Subject: check if there is data in stdin without blocking
References: <4PMqh.47441$X97.9536@newsfe18.lga>
	<uhNqh.47996$X97.358@newsfe18.lga>
	<1168876929.239494.93830@v45g2000cwv.googlegroups.com>
Message-ID: <m4Oqh.191440$gl2.57804@newsfe16.lga>

Paul Boddie wrote:

> hg wrote:
>> import select
> 
> [...]
> 
>>   File "/home/philippe/Desktop/select.py", line 4, in ?
> 
> Consider which module Python is trying to import here: the standard
> library select module or your own program?
> 
> Paul

Argh !!!! ;-)



thanks




From pierre at saiph.com  Sat Jan 13 04:58:04 2007
From: pierre at saiph.com (Imbaud Pierre)
Date: Sat, 13 Jan 2007 10:58:04 +0100
Subject: closed: module file
In-Reply-To: <45a7ba78$0$316$426a74cc@news.free.fr>
References: <45a7ba78$0$316$426a74cc@news.free.fr>
Message-ID: <45a8ad2d$0$31416$426a34cc@news.free.fr>

Imbaud Pierre a ?crit :
> I am willing to retrieve the file an imported module came from;
> module.__file__, or inspect.getfile(module) only gives me the
> relative file name. How do I determine the path?
> Its obviously possible from python: ipython displays the information
> (interactively: *module?*).
> Python 2.4 on Suse 9.3 (clueless, I guess)
Apologies: module.__file__, or inspect.getfile(module) only *gave* me
the relative file name, because the module was found in the current
directory! Changing the current directory, and having the module be
found thru the path, changed the returned path to an absolute
directory!
Hence the simplest form at hand was used. Thank you, python!



From danb_83 at yahoo.com  Tue Jan  9 22:39:22 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 9 Jan 2007 19:39:22 -0800
Subject: Summarizing data by week
In-Reply-To: <1168372624.543712.149070@77g2000hsv.googlegroups.com>
References: <1168372624.543712.149070@77g2000hsv.googlegroups.com>
Message-ID: <1168400362.399657.291890@k58g2000hse.googlegroups.com>

On Jan 9, 1:57 pm, "Mike Orr" <sluggos... at gmail.com> wrote:
> What's the best way to summarize data by week?  I have a set of
> timestamped records, and I want a report with one row for each week in
> the time period, including zero rows if there are weeks with no
> activity.  I was planning to use ISO weeks because datetime has a
> convenient .isocalendar() method, but I want each output row to have a
> label like this:
>
>     2006 week 5 (Feb)
>
> However, to get the month (of the Thursday of that week) I have to
> convert it back to an actual date,and I don't see a method to do that
> in datetime or dateutil or mx.DateTime.
>
> I was planning to use a dateutil.rrule to generate the weeks from the
> minimum to maximum date, including any weeks that have no activity (so
> they won't be in the dictionary).  But rrule sequences are based on an
> actual start date, not an ISO week, so that won't work.  Unless perhaps
> I take the minimum date and calculate the Thursday of that week, and
> start from there.  Then all my conversions would be to iso_week rather
> than from iso_week.

That would work.  The first Thursday of the year can be computed as:

def first_thursday(year):
    jan1 = datetime.date(year, 1, 1)
    return jan1 + datetime.timedelta((3 - jan1.weekday()) % 7)



From gagsl-py at yahoo.com.ar  Sun Jan 14 11:50:44 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 14 Jan 2007 13:50:44 -0300
Subject: Decorators inside of class and decorator parameters
References: <1168728983.541526.202320@l53g2000cwa.googlegroups.com><eoca93$m0d$1@sea.gmane.org>
	<eodck0$32a$1@sea.gmane.org>
Message-ID: <eodn13$3jn$1@sea.gmane.org>

"Colin J. Williams" <cjw at sympatico.ca> escribi? en el mensaje 
news:eodck0$32a$1 at sea.gmane.org...

> Gabriel Genellina wrote:
>> As said in the beginning, there is no use for decorators as methods 
>> (perhaps
>> someone can find a use case?)
> Except, perhaps to indicate to the script reader that the decorator only
> applies within the class?

But it looks rather strange - a method without self, that is not a 
classmethod nor static method, and can't be called on an instance...

-- 
Gabriel Genellina 





From S.Mientki-nospam at mailbox.kun.nl  Sat Jan  6 13:49:52 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sat, 06 Jan 2007 19:49:52 +0100
Subject: still struggling, howto use a list-element as a name ?
Message-ID: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>

In the example below, "pin" is an object with a number of properties.
Now I want
1- an easy way to create objects that contains a number of these "pin"
2- an multiple way to access these "pin", i.e.
         device.pin[some_index]
	device.some_logical_name
ad 1:
a dictionary (as "pinlist" in the example) seems a very convenient 
     way (from a viewpoint of the device creator).
As you can see in the "__init__" section this dictionary can easily be 
transported to the pin-objects.

ad 2:
THAT's the problem: how do automate these lines "self.GND = self.pin[0]"

I'm also in for other solutions.

thanks,
Stef


class Power_Supply(device):
     pinlist = {
         0: ('GND', _DIG_OUT, _par2),
         1: ('VCC', _DIG_OUT, _par33)
         }

     def __init__(self):
         # store pin-names and pin-parameters in pins
         for k in self.pinlist.keys():
           self.pin[k].Name = self.pinlist[k][0]
           self.pin[k].Value = self.pinlist[k][2]

         # for some pins, we also want to be able to use logical names
         # HOW TO USE SOMETHING like
         #     "self.pinlist[0] = self.pin[0]"
         # INSTEAD OF
         self.GND = self.pin[0]
         self.VCC = self.pin[1]

# create a Power_Supply instance and
# test if pins can be referenced in
Power = Power_Supply()
netlist1 = ( Power.VCC, Power.pin[1], Power.GND, Power.pin[0] )


From sschwarzer at sschwarzer.net  Fri Jan  5 20:38:15 2007
From: sschwarzer at sschwarzer.net (Stefan Schwarzer)
Date: Sat, 06 Jan 2007 02:38:15 +0100
Subject: How to get file name on a remote server with ftplib?
In-Reply-To: <1168009814.236723.105280@51g2000cwl.googlegroups.com>
References: <1168008952.020516.130890@s80g2000cwa.googlegroups.com>
	<1168009814.236723.105280@51g2000cwl.googlegroups.com>
Message-ID: <459EFD87.9000107@sschwarzer.net>

On 2007-01-05 16:10, wittempj at hotmail.com wrote:
> alex wrote:
>> My script is trying to get a file from a remote server, every day it
>> ftps from a directory. My code works perfect if I know the name of the
>> file in the remote directory.
>>
>> ftp.retrbinary('RETR ' + filename, handleDownload)
>>
>> The problem is that in the future the name of the file is going to be
>> aleatory. How can I get the file's name (only one file is in that
>> directory) and store it in a variable before executing ftp.retrbinary?
>>
>> Thanks a lot for your help,
>>
> You can use the nlst(dirname) method to retrieve a directory listing on
> the remote server. If the remote server doesn't support NLST command
> rhen you could do ftp.retrlines('LIST')  and parse the results to get a
> directory listing.

ftputil ( http://ftputil.sschwarzer.net/ ) could help with
this parsing. A session may look like

>>> import ftputil
>>> host = ftputil.FTPHost("ftp.domain.com", "user", "password")
>>> file_names = host.listdir(host.curdir)
>>> file_names
['wanted_filename']
>>> file_name = file_names[0]
>>> host.download(file_name, file_name, "b")
>>> host.close()

Ok, I admit this isn't a pure-ftplib solution. :-)

Stefan

-- 
Dr.-Ing. Stefan Schwarzer
SSchwarzer.com - Softwareentwicklung f?r Technik und Wissenschaft
http://sschwarzer.com


From Robert.Katic at gmail.com  Tue Jan 16 11:27:18 2007
From: Robert.Katic at gmail.com (goodwolf)
Date: 16 Jan 2007 08:27:18 -0800
Subject: arguments of a function/metaclass
In-Reply-To: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>
References: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>
Message-ID: <1168964835.087773.221950@s34g2000cwa.googlegroups.com>


rubbishemail at web.de je napisao/la:
> Hello,
>
>
> I have a member function with many (20) named arguments
>
> def __init__(self,a=1,b=2):
>     self.a=a
>     self.b=b
>
> I would like to get rid of the many redundant lines like self.a=a and
> set the members automatically.
> The list of default arguments could be given like
>
> def __init__(**kwargs):
>     arglist={"a":1,"b":2]
>
> if this makes things easier
>
> Of course there has to be a check that raises an error in case of an
> unknown argument not mentioned in this list.
>
>
> I am sure there is an elegant way how to do this, could you give me any
> hints???
>
>
> Many thanks
>
>
>
> Daniel

A simply solution:

def __init__(self, a=1, b=2, c=3, ......):
    for key, val in locals().items():
        if key != 'self':
            setattr(self.__class__, key, val)

in addition:

def set(self, **kwarg):
    for key in kwargs:
        if hasattr(self.__class__, key):
            setattr(self.__class__, key, kwargs[key])
        else:
            raise ....

This solution is appropriate with use of proprieties.
For better proprety usage look at
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/442418



From buzzard at urubu.freeserve.co.uk  Mon Jan 29 20:27:08 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Tue, 30 Jan 2007 01:27:08 +0000
Subject: set update in 2.5
In-Reply-To: <ephpiv$pgb$02$1@news.t-online.com>
References: <45bc0c0c.0@entanet> <ephpiv$pgb$02$1@news.t-online.com>
Message-ID: <45bea503.0@entanet>

Peter Otten wrote:
> Duncan Smith wrote:
> 
> 
>>     In moving from 2.4 to 2.5 I find that some of my unit tests are now
>>failing.  I've worked out that the problem relates to the set update
>>method.  In 2.4 I could update a set with an iterable type derived from
>>dict as the argument.  I now find that the set is updated with the hash
>>values of the items in my iterable, rather than the items themselves.
>>Converting to a list first gets round the problem.
>>
>>My iterable type has the same API as 'set' but requires items to have
>>hashable 'uid' attributes, so they can also be looked up by uid.  I hope
>>this, and the fact that this worked fine in 2.4 will be enough to track
>>down the issue without me having to paste reams of code (other than the
>>following, pasted from IDLE).  Any ideas?  Cheers.
>>
>>Duncan
>>
>>
>>
>>>>>from graphItems import Node
>>>>>from keyed_sets import KeyedSet
>>>>>n = Node(1)
>>>>>n.uid
>>
>>1
>>
>>>>>k = KeyedSet([n])
>>>>>k
>>
>>KeyedSet([1])
>>
>>>>>type(iter(k).next())
>>
>><class 'graphItems.Node'>
>>
>>>>>type(k[1])
>>
>><class 'graphItems.Node'>
>>
>>>>>s = set()
>>>>>s.update(list(k))
>>>>>type(iter(s).next())
>>
>><class 'graphItems.Node'>
>>
>>>>>s = set()
>>>>>s.update(k)
>>>>>type(iter(s).next())
>>
>><type 'int'>
>>
>>>>>s = set()
>>>>>s.add(n)
>>>>>type(iter(s).next())
>>
>><class 'graphItems.Node'>
>>
>>>>>hash(n)
>>
>>1
>>
> 
> Is your KeyedSet derived from dict?
> 

Thanks Peter.  It is derived from dict.

> $ python2.5
> [snip]
> 
>>>>class D(dict):
> 
> ...     def __iter__(self): return self.itervalues()
> ...
> 
>>>>d = D(a=1, b=2)
>>>>set(d)
> 
> set(['a', 'b'])
> 
> 
> $ python2.4
> [snip]
> 
>>>>class D(dict):
> 
> ...     def __iter__(self): return self.itervalues()
> ...
> 
>>>>d = D(a=1, b=2)
>>>>set(d)
> 
> set([1, 2])
> 
> 
> I think you should file a bug report. The fix is probably
> 
> --- setobject.c 2006-09-08 08:02:26.000000000 +0200
> +++ setobject_new.c     2007-01-28 10:02:24.071688248 +0100
> @@ -854,7 +854,7 @@
>         if (PyAnySet_Check(other))
>                 return set_merge(so, other);
> 
> -       if (PyDict_Check(other)) {
> +       if (PyDict_CheckExact(other)) {
>                 PyObject *value;
>                 Py_ssize_t pos = 0;
>                 while (PyDict_Next(other, &pos, &key, &value)) {
> 
> Peter

I will file a report.  Cheers.

Duncan


From martin at v.loewis.de  Wed Jan  3 10:52:22 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 03 Jan 2007 16:52:22 +0100
Subject: bad marshal data in site.py in fresh 2.5 install win
In-Reply-To: <mailman.2161.1167505262.32031.python-list@python.org>
References: <mailman.2129.1167420492.32031.python-list@python.org>	<4595B89C.9090208@v.loewis.de>
	<mailman.2161.1167505262.32031.python-list@python.org>
Message-ID: <459bd136$0$20860$9b622d9e@news.freenet.de>

TiNo schrieb:
>  File "F:\Python25\lib\encodings\__init__.py", line 32, in <module>
>    from encodings import aliases
> ValueError: bad marshal data
> 
> also removed site.pyc, and run it again, but with the same result.

It's likely rather aliases.pyc which is bad, so try removing that.
If in doubt, remove all .pyc files.

If one of them is bad, it's either because the stick wasn't ejected
properly at some point, or it suffers from data loss.

Regards,
Martin


From toby at tobiah.org  Thu Jan 25 17:39:57 2007
From: toby at tobiah.org (Tobiah)
Date: Thu, 25 Jan 2007 14:39:57 -0800
Subject: Right-Justifying Numeric Output
In-Reply-To: <mailman.3172.1169764485.32031.python-list@python.org>
References: <mailman.3171.1169763446.32031.python-list@python.org>	<ybauh.51060$oA1.7068@newsfe19.lga>
	<mailman.3172.1169764485.32031.python-list@python.org>
Message-ID: <45b92516$0$24366$88260bb3@free.teranews.com>


>   Thank you very much! I didn't see this in any of my Python books or on 
> the

I like to look at the printf docs for any C compiler.  On Unix,
man 3 printf


-- 
Posted via a free Usenet account from http://www.teranews.com



From exarkun at divmod.com  Wed Jan 17 11:40:11 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 17 Jan 2007 11:40:11 -0500
Subject: how to write unicode to a txt file?
In-Reply-To: <1169051293.848769.163860@s34g2000cwa.googlegroups.com>
Message-ID: <20070117164011.11447.458124722.divmod.quotient.19755@ohm>

On 17 Jan 2007 08:28:14 -0800, Frank Potter <could.net at gmail.com> wrote:
>I want to change an srt file to unicode format so mpalyer can display
>Chinese subtitles properly.
>I did it like this:
>
>txt=open('dmd-guardian-cd1.srt').read()
>txt=unicode(txt,'gb18030')
>open('dmd-guardian-cd1.srt','w').write(txt)
>
>But it seems that python can't directly write unicode to a file,
>I got and error at the 3rd line:
>UnicodeEncodeError: 'ascii' codec can't encode characters in position
>85-96: ordinal not in range(128)
>
>How to save the unicode string to the file, please?

You cannot save unicode to a file.  Files can only contain bytes.  You
can encode the unicode into a str and then write the str to the file.

    f = open('...', 'w')
    f.write(txt.encode(encoding))
    f.close()

The encoding you select must be able to represent each code point in the
unicode object you encode with it.  The "ascii" encoding cannot encode all
of your code points, so when Python implicitly uses it, you get the
exception above.  If you use an encoding like "utf-8" which can represent
every code point, you won't see this exception.  You could also use the same
encoding which you used to decode the str originally, "gb18030", which will
be able to represent every code point, since it produced them in the first
place.  Of course, if you do this, you may as well not even bother to do the
decoding in the first place, unless you have some code in between the input
and output steps which manipulates the unicode in some way.

Jean-Paul


From omniflex at mail.ru  Mon Jan  8 11:06:54 2007
From: omniflex at mail.ru (Alex)
Date: Mon, 8 Jan 2007 18:06:54 +0200
Subject: popen, Pipes with programs that expect user input
Message-ID: <536598837.20070108180654@mail.ru>

Hello everyone,


I am writing a terminal server client-server application, that offers
the client the ability to run commands on the server and read their
output.

So far everything works fine, but I encounter a problem with commands
which require some sort of user input; i.e. they don't return
immediately.

This is my setup:
Python 2.4.3 (#69, Apr 11 2006, 15:32:42) [MSC v.1310 32 bit (Intel)]
on win32  


---------------------
import os

def myExecEx(command):
        """Executes a command and returns a tuple (stdin,
        stdout_stderr)"""  
        outErrFile, inFile = os.popen4(command)
        
        return (inFile, outErrFile)
        

fouterr, fin = myExecEx('date')   # try 'date /t' as well
#fin.write('\n')

try:
        data=fouterr.read()
        print data
except:
        print "an exception occurred"
---------------------

On Windows, the 'date' command will show the current date, and then
prompt me to enter a new one (thus waiting for something to come to
STDIN)

I am reading the output with:
  data=fouterr.read()

but data is empty (also, I must mention that "an exception occurred"
is not shown)

If I execute
   myExecEx('date /t')

(the /t parameter tells the date tool that it has to print the current
date and not wait for user input), then the program works as
expected).

Also, I noticed that if I uncomment the line in which I wrote to
STDIN:
      fin.write('\n')

then I can read STDOUT without problems (but this is counter-intuitive
to me; I don't know what to write to STDIN before I see what STDOUT
has to say). 


I have tried other commands from the popen family, but in either case
the behaviour was the same.


Could someone point out the cause of this?  It seems to me that the
interpreter is stuck at this line
  data=fouterr.read()

and it won't go forward unless popen returns. If so, how should the
objective be achieved?


Thank you



From jstroud at mbi.ucla.edu  Mon Jan 15 22:59:26 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 15 Jan 2007 19:59:26 -0800
Subject: Does class patching actually work
In-Reply-To: <k4Xqh.49756$wc5.21255@newssvr25.news.prodigy.net>
References: <k4Xqh.49756$wc5.21255@newssvr25.news.prodigy.net>
Message-ID: <eohiiu$3j6$1@daisy.noc.ucla.edu>

John Nagle wrote:
> In M2Crypto/m2urllib there is this:
> 
>     import string, sys, urllib
>     from urllib import *
> 
>     def open_https(self, url, data=None, ssl_context=None):
>      ...
> 
>     # Minor brain surgery.
>     URLopener.open_https = open_https
> 
> The intent of this is to replace method open_https of class URLopener
> with a local, patched version.
> 
> Does that actually work?  When I've tried to do that in other code, it
> seems to have no effect.  In fact, I can write
> 
>     URLopener.open_https = None
> 
> and nothing changes.
> 
>                 John Nagle

I'm not able to reproduce your results with python 2.5.

py> from urllib import *
py> URLopener.open_https = None
py> URLopener.open_https
py> type(URLopener.open_https)
<type 'NoneType'>
py> def doit(self, url, data=None, ssl_context=None):
...   print 'self is %s, url is %s' % (self, url)
...
...
py> URLopener.open_https = doit
py> u = URLopener()
py> u = u.open_https('http://wherever.com')
self is <urllib.URLopener instance at 0x4066070c>, url is 
http://wherever.com


From exarkun at divmod.com  Tue Jan  2 12:10:28 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 2 Jan 2007 12:10:28 -0500
Subject: Looking for python SIP/MGCP stacks
In-Reply-To: <1ECA23B17E8AB54C859FA0449B729F0E03428702@xmb-sjc-235.amer.cisco.com>
Message-ID: <20070102171028.11447.1431176323.divmod.quotient.4684@ohm>

On Tue, 2 Jan 2007 09:02:17 -0800, "Jenny Zhao \(zhzhao\)" <zhzhao at cisco.com> wrote:
>Thanks Anthony.
>
>I am wondering where I can get Divmod Sine and Shtoom. Are they open
>source ?
>

http://divmod.org/trac/wiki/DivmodSine

http://divmod.org/trac/wiki/ShtoomProject

Shtoom is LGPL.  Sine borrows some code from it, so it is probably LGPL as well.

Jean-Paul


From pavlovevidence at gmail.com  Sun Jan 21 19:04:33 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 21 Jan 2007 16:04:33 -0800
Subject: Reading Fortran Data
References: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>
Message-ID: <1169424273.929396.133880@m58g2000cwm.googlegroups.com>

Tyler wrote:
> Hello All:
>
> After trying to find an open source alternative to Matlab (or IDL), I
> am currently getting acquainted with Python and, in particular SciPy,
> NumPy, and Matplotlib. While I await the delivery of Travis Oliphant's
> NumPy manual, I have a quick question (hopefully) regarding how to read
> in Fortran written data.

I think you made a good choice, if for no other reason than the fact
that Python and numpy absolutely rock when it comes to interfacing with
Fortran (and any C code that can be called by Fortran).  I suggest
having a look at pyfort and/or f2py to see if they can be useful to
you.  If your data files are temporary (that is, they only exist to
pass data from one program to another), you might not even need them.

For completeness, I'll answer how to write as well as read Fortran
data.  It turns out that all of this can be done without numpy, but
there is one very convenient numpy function.

> The data files are not binary, but ASCII text files with no formatting
> and mixed data types (strings, integers, floats). For example, I have
> the following write statements in my Fortran code:
>
> I write the files as such:
>   WRITE(90,'(A30)') fgeo_name
>   WRITE(90,'(A30)') fmed_name

Fortran pads it's output when using a width field.  A good way to do
this in Python is to use string formating with a given width.  If
fgeo_name is a Python string, they you'd write something like this:

f.write("%-30s\n" % fgeo_name)

The negeative sign is to pad the name on the left, which is how Fortran
does it (by default, Python string formatting pads on the right).  You
could also use the .ljust method of string objects:

f.write(fgeo_name.ljust(30) + "\n")

Don't forget the newline on the end.

>   WRITE(90,*) nfault,npoint

Fortran writes this as two arbitrary integers separated by a space.  To
do this in Python, use string formating.  This also adds a space to the
beginning as most Fortran implementations seem to do.

f.write(" %d %d\n" % (nfault,npoint))

>   WRITE(90,*) (xpt(n), n=1,npoint)
>   WRITE(90,*) (ypt(n), n=1,npoint)

Now, an array.  I think you'd be safest writing one value per line.
You would do that like this:

for x in xpt:
    f.write(" %#g\n" % x)

The # sign is there to force the number to be formatted with a decimal
point.  You'll probably want to tweak the format string in other ways
(to specify a precision, for instance).


> and,
>
>   WRITE(10,'(A30)') fname
>   DO i=1,nfault
>      WRITE(10,*) dbn(i),dtn(i),xfwnt(i),yfwnt(i),xfent(i),yfent(i),&
>           &        slpvlS(i),slpvlD(i),slpvlT(i),segdp1(i)
>   END DO

I'd write this as one number per line.

f.write("%-30s\n" % fname)
for i in range(nfault):
    f.write(" %#g\n" % dbn[i])
    f.write(" %#g\n" % dtn[i])
    # and so on

If you know Python well, there are "more Pythonic" ways to do this, but
this is straightforward and works well enough.  Now for the reading
part.

> I then respectively read them into Fortran as:
>   READ(70,'(A30)') fgeo_name
>   READ(70,'(A30)') fmed_name

Once you've opened a file, then:

fgeo_name = f.readline().strip()
fmed_name = f.readline().strip()

Note that this strips the padding off the name.  If the first line of
the file is "ABC" followed by 27 spaces, the result will be "ABC" with
the spaces stripped.

>   READ(70,*) nfault,npoint

Python doesn't have any built in input formating (a la READ in Fortran
or scanf in C), so one usually does this kind of thing by hand.
Fortunately, Python makes this quite easy.  The following will do what
you want:

s = f.readline().split()
nfault = int(s[0])
npoint = int(s[1])

Here's what happens: it reads in a line, and splits the line on
whitespace into substrings.  It assigns the list of substrings to s.
Then it converts the first substring (s[0]) to an int and assigns it to
nfault; the second (s[1]) to npoint.

With more advanced knowledge of Python, you could write it in one line
like this:

nfault,npoint = (int(ss) for ss in f.readline().split())


>   READ(70,*) (x(n), n=1,npoint)
>   READ(70,*) (y(n), n=1,npoint)

Fortran programs seem to wrap free-form output to 80 columns, inserting
newlines whenever.  Because of this, you can't really free-form read
data in a line-by-line way (unless it's short, like the above example),
but now have to read data number-by-number, which is not so
straightforward.

Fortunately, numpy has a function, fromfile, which reads data
number-by-number.  If f is the file object you're reading from, then
you could read in the array like this:

x = numpy.fromfile(f,sep=" ",count=npoint,dtype=numpy.Float)

According to my tests, this leaves f pointing right past the end of the
array, so that you can still read in other arrays and variables.  Don't
forget to specify the type.


> and,
>
>   READ(20,'(A30)') fname
>   DO i=1,nfault
>      READ(20,*) dbn(i),dtn(i),xfwnt(i),yfwnt(i),xfent(i),yfent(i),&
>           &        slpvlS(i),slpvlD(i),slpvlT(i),segdp1(i)
>   END DO

Because this line has a very good chance of being split up upon output,
and because they're all real numbers, I'd use numpy.fromfile to read
this, and then assign to the different arrays.

So,

for i in range(nfault):
    tmp = numpy.fromfile(f,sep=" ",count=10,dtype=numpy.Float)
    dbn[i] = tmp[0]
    dtn[i] = tmp[1]
    # and so on

More advanced stuff, such as use of slices, can simplify this a lot.

> I also read them into IDL for visualization using the "READF" command.
> I was wondering how I might go about reading this into Python using
> NumPy. If this is not trivial, let me know and I'll just wait until the
> NumPy manual arrives.

One thing I highly recommend is that you not ignore the Pure Python
stuff.  Many of the solutions I gave you here didn't use numpy at all.
Successful usage of the numpy is going to depend a lot on knowing
normal Python.  For numerical applications, I suggest you become very
familiar with file I/O, strings and string handling, basic container
types (lists, tuples, dicts, and sets) and the operations they support
(slicing, iteration), and of course, numerics.


Carl Banks



From h-broutin at bordeaux-port.fr  Mon Jan 29 09:01:58 2007
From: h-broutin at bordeaux-port.fr (herve)
Date: Mon, 29 Jan 2007 15:01:58 +0100
Subject: wxPython StatusBar Help
Message-ID: <45bdfdc3$0$6722$426a74cc@news.free.fr>

Hi, everybody

I'm working with wxPython 2.8.1.1.

Does anybody know how to change the foreground colors in a wx.StatusBar


From moin at blackhole.labs.rootshell.ws  Tue Jan 16 17:50:33 2007
From: moin at blackhole.labs.rootshell.ws (S.Mohideen)
Date: Tue, 16 Jan 2007 16:50:33 -0600
Subject: POSH
Message-ID: <20070116165033.a5e980d7.moin@blackhole.labs.rootshell.ws>

Hi Folks,
                I am implementing a multithreaded Network application in Python. As most of you know that the GIL hinders the performance scalablity in SMP machines. I came across POSH. Here they talk about multiple instances of Python Interpreter sticking around a Shared memory , bypassing the GIL effect.  Is anybody tried the POSH - does it really increases the performance ?? How good or bad is to have the POSH module imported into ones Python code. Please share your experience, if any, about POSH.

Cheers
Moin


-- 
S.Mohideen <moin at blackhole.labs.rootshell.ws>


From timr at probo.com  Fri Jan 19 03:40:05 2007
From: timr at probo.com (Tim Roberts)
Date: Fri, 19 Jan 2007 08:40:05 GMT
Subject: Is it possible to fasten the import of cgi?
References: <45af6f47$0$322$e4fe514c@news.xs4all.nl>
Message-ID: <5q01r2p4hnnrm1b8fh5dul6qmoc1lsf4re@4ax.com>

Cecil Westerhof <dummy at dummy.nl> wrote:
>
>I have a cgi-script dat uses the modules cgi, os, sys and time. Offcourse I
>can not time the time used to import time, but os and sys do not take more
>as a millisecond. My script itself takes 3 or 4 milliseconds. But importing
>cgi takes 95 milliseconds. (This is on my test system a PII 300 MHz. Is
>there a way to make this more fast? The import off cgi makes the script at
>least 20 times as slow. Something like mod-python is not a possibility. I
>could use it on my test machine, but not at the osting provider.

Realistically, do you plan to support more than a few dozen requests per
minute?  If not, then it doesn't matter at all.  The script launch overhead
is an insignificant part of the user's browser experience.

If you do expect a hundred requests per minute, then CGI is not an
appropriate choice.  You either need to switch to a one of the web
frameworks (like CherryPy or Django or WebWare or one of the hundreds of
others), or <gack> move to PHP.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From http  Wed Jan 24 20:09:50 2007
From: http (Paul Rubin)
Date: 24 Jan 2007 17:09:50 -0800
Subject: Static variables
References: <ep8gkl$g7v$3@news.in.tum.de>
	<fVPth.1713$G23.1170@newsreading01.news.tds.net>
	<45b7cfd4$0$16160$426a74cc@news.free.fr>
	<1169687035.433771.177900@v45g2000cwv.googlegroups.com>
Message-ID: <7xd5536hep.fsf@ruckus.brouhaha.com>

bearophileHUGS at lycos.com writes:
> An interesting solution, I have never created such grouped closures. I
> don't know if this solution is better than a class with some class
> attributes plus some class methods...

It's a Scheme idiom but I think once the object gets this complicated,
it's probably more Pythonic to use a class.


From smusnmrNOSPAM at yahoo.com  Fri Jan  5 08:56:52 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Fri, 5 Jan 2007 14:56:52 +0100
Subject: where to find wx package
References: <enl7h1$49m$1@zam602.zam.kfa-juelich.de>
	<Xns98AF674C4339FrtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <enllf5$6j3$1@zam602.zam.kfa-juelich.de>

Thanks Rob!

siggi

"Rob Williscroft" <rtw at freenet.co.uk> schrieb im Newsbeitrag 
news:Xns98AF674C4339FrtwfreenetREMOVEcouk at 216.196.109.145...
> siggi wrote in news:enl7h1$49m$1 at zam602.zam.kfa-juelich.de in
> comp.lang.python:
>
>> Hi all,
>>
>> a newbie question:
>>
>> I have a program gui03A.py using wxPython, importing it such:
>> "from wxPython.wx import *"
>>
>> The program works, but I get the warning message:
>>
>> "gui03A.py:4: DeprecationWarning: The wxPython compatibility package
>> is no longer  automatically generated or activly maintained.  Please
>> switch to the wx package  as soon as possible."
>>
>> However, after extensive searching on www.python.org and Googling the
>> web, I do not find any package with "wx" as its only name.
>>
>> Where can I get the wx package (for win32 XP)?
>
> The "wx package" talked about above is also part of WxPython,
> so you have already got it. To import it use:
>
> import wx
>
> You will need to translate all (well most) identifiers in
> your programme from wxBlah to wx.Blah so:
>
> class MyFrame( wxFrame ):
>  pass
>
> becomes
>
> class MyFrame( wx.Frame ):
>  pass
>
> Rob.
> -- 
> http://www.victim-prime.dsl.pipex.com/ 




From felipe.lessa at gmail.com  Mon Jan  8 11:35:21 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Mon, 8 Jan 2007 14:35:21 -0200
Subject: Suitability for long-running text processing?
In-Reply-To: <84fb38e30701080813k1be616fch6d01922fb7a92fc5@mail.gmail.com>
References: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>
	<c2701f5c0701080801w4d3c378elf901db19610a2e9e@mail.gmail.com>
	<84fb38e30701080813k1be616fch6d01922fb7a92fc5@mail.gmail.com>
Message-ID: <c2701f5c0701080835o7013c43fm3e71e9b7d1a11329@mail.gmail.com>

On 1/8/07, tsuraan <tsuraan at gmail.com> wrote:
>
>
> > I just tried on my system
> >
> > (Python is using 2.9 MiB)
> > >>> a = ['a' * (1 << 20) for i in xrange(300)]
> > (Python is using 304.1 MiB)
> > >>> del a
> > (Python is using 2.9 MiB -- as before)
> >
> > And I didn't even need to tell the garbage collector to do its job. Some
> info:
>
> It looks like the big difference between our two programs is that you have
> one huge string repeated 300 times, whereas I have thousands of
> four-character strings.  Are small strings ever collected by python?

In my test there are 300 strings of 1 MiB, not a huge string repeated. However:

$ python
Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02)
[GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> # Python is using 2.7 MiB
... a = ['1234' for i in xrange(10 << 20)]
>>> # Python is using 42.9 MiB
... del a
>>> # Python is using 2.9 MiB

With 10,485,760 strings of 4 chars, it still works as expected.

-- 
Felipe.


From harry.g.george at boeing.com  Wed Jan 24 01:04:22 2007
From: harry.g.george at boeing.com (Harry George)
Date: Wed, 24 Jan 2007 06:04:22 GMT
Subject: My python programs need a GUI, wxPython or PyQt4?
References: <ep60jp$63v$1@aioe.org> <ep64ic$epi$1@aioe.org>
	<45b69f63$0$24463$88260bb3@free.teranews.com>
Message-ID: <xqxmz493qqh.fsf@cola3.ca.boeing.com>

"Joshua J. Kugler" <joshua at eeinternet.com> writes:

> Daniel wrote:
> 
> > I've downloaded both the wxPython and the PyQt4 package, and by the
> > first impression I must say that the PyQt4 system had a very
> > compelling presentation. From what I can understand from the feedback
> > I've gotten so far is that the wxPython is a better choice when it
> > comes to compability (with linux), and it's free even if I want to
> > create applications and sell them.
> > So, from what I understand I will have to go with PyQt4 since (from
> > my understanding):
> > 1. I will not sell the applications I'm working with since they will
> > only be used by the internal QA at a computer game company.
> 
> Even that is getting on shaky ground, at least according to Troll Tech. 
> See: http://www.trolltech.com/developer/knowledgebase/190/  So, write it
> for internal use, and put up for distribution on your personal web site
> (pending company approval, of course).
> 
> j
> 
> -- 
> Joshua Kugler
> Lead System Admin -- Senior Programmer
> http://www.eeinternet.com
> PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE
> 
> -- 
> Posted via a free Usenet account from http://www.teranews.com
> 

There are several OSS suppliers that use GPL, and then try to define
its meaning.  They are welcome to comment on their understanding of
the GPL, but they do not have the authority to actually define its
legal ramifications.  Check with your company legal staff.

Having said that, I have been troubled by trolltech's approach from
the beginning, and therefore stay away from it.  PyGTK and wdxPython
are solid GUIs, without the legal uncertainty.


-- 
Harry George
PLM Engineering Architecture


From helgaorg at gmail.com  Tue Jan 30 10:42:22 2007
From: helgaorg at gmail.com (Jason Persampieri)
Date: Tue, 30 Jan 2007 10:42:22 -0500
Subject: printing to a redirected stdout from a process that was called
	with "2>&1 > /dev/null &"
In-Reply-To: <20070130153919.GA12259@kateandchris.net>
References: <1170112357.792999.241280@s48g2000cws.googlegroups.com>
	<20070130153919.GA12259@kateandchris.net>
Message-ID: <d49424c0701300742s1a1b9bfqce132b6abb2d4387@mail.gmail.com>

Sadly, the group is tied to Python 2.3 for now.

Actually, I got around this problem by using an intermediate process that
happens to handle output on its own (bsub).

On 1/30/07, Chris Lambacher <chris at kateandchris.net> wrote:
>
> The subprocess module is probably a good starting point:
> http://docs.python.org/dev/lib/module-subprocess.html
>
> It will allow you greater control over what happens with the output of a
> process that you start.  Specifically look at the the stdout and stderr
> arguments to Popen.  You can provide these with an open file descriptor or
> a
> file object and it will dump the output into there.
>
> -Chris
> >
> > _jason
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070130/139af2c8/attachment.html>

From mattheww at chiark.greenend.org.uk  Tue Jan 30 13:06:15 2007
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 30 Jan 2007 18:06:15 +0000 (GMT)
Subject: Synchronous shutil.copyfile()
References: <mailman.3305.1170169527.32031.python-list@python.org>
Message-ID: <Vuj*fj+Br@news.chiark.greenend.org.uk>

Hugo Ferreira <bytter at gmail.com> wrote:
> I have a problem. I'm using calling shutil.copyfile() followed by
> open(). The thing is that most of the times open() is called before
> the actual file is copied. I don't have this problem when doing a
> step-by-step debug, since I give enough time for the OS to copy the
> file, but at run-time, it throws an exception.
>
> Is there anyway to force a sync copy of the file (make python wait for
> the completion)?

shutil.copyfile() closes both files before it returns, so I suspect
this is an OS-level bug.

The most likely culprits are buggy network filesystems and buggy
on-access virus scanners.

-M-



From robert.kern at gmail.com  Thu Jan 11 18:18:51 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 11 Jan 2007 17:18:51 -0600
Subject: Rational Numbers
In-Reply-To: <cb63d1e10701111420l28d0f0d0s35217370d86067b@mail.gmail.com>
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>	<eo65qk$bsr$1@sea.gmane.org>
	<cb63d1e10701111420l28d0f0d0s35217370d86067b@mail.gmail.com>
Message-ID: <eo6gl2$lrl$2@sea.gmane.org>

Noud Aldenhoven wrote:

> I'm a mathematician (in learning, with a bad feeling for English) and
> don't trust irrational numbers in programming languages.

You may want to look at SAGE. It provides a ton of good mathematical code.

  http://sage.scipy.org/sage/

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From steven.bethard at gmail.com  Wed Jan 31 19:08:54 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 31 Jan 2007 17:08:54 -0700
Subject: How to sort using hash's key?
In-Reply-To: <mailman.3375.1170284622.32031.python-list@python.org>
References: <mailman.3375.1170284622.32031.python-list@python.org>
Message-ID: <wt-dnXMFALATslzYnZ2dnUVZ_qXinZ2d@comcast.com>

JoJo wrote:
> I want to sort a dict via its key,but I have no idea on how to do it.

>>> d = dict(a=2, b=1)
>>> for key in sorted(d):
...     print key, d[key]
...
a 2
b 1

STeVe


From gagsl-py at yahoo.com.ar  Mon Jan 15 17:57:46 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 15 Jan 2007 19:57:46 -0300
Subject: The curious behavior of integer objects
In-Reply-To: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
References: <teTqh.2829$bp4.2788@bignews4.bellsouth.net>
Message-ID: <7.0.1.0.0.20070115195128.05c0b0e8@yahoo.com.ar>

At Monday 15/1/2007 19:28, Jim B. Wilson wrote:

>Am I nuts? Or only profoundly confused? I expected the this little script
>to print "0":
>
>class foo(int):
>   def __init__(self, value):
>     self = value & 0xF
>
>print foo(0x10)
>
>Instead, it prints "16" (at least on python 2.4.4 (Linux) and 2.5 (Wine).

Integers are immutable. Insert a print statement and you'll see your 
__init__ is never called. Anyway, what would you expect from "self = 
something"?
Use __new__ instead:

py> class foo(int):
...   def __new__(cls, value):
...     return int(value & 0xF)
...
py> foo(1)
1
py> foo(0x10)
0

See "Special method names" inside the Python Reference Manual.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From fredrik at pythonware.com  Wed Jan 10 10:18:59 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 10 Jan 2007 16:18:59 +0100
Subject: Working with named groups in re module
References: <slrneq9vl3.bg.horpner@FIAD06.norwich.edu>
Message-ID: <eo3053$9ta$1@sea.gmane.org>

Neil Cerutti wrote:

> A found some clues on lexing using the re module in Python in an
> article by Martin L?wis.

>   Here, each alternative in the regular expression defines a
>   named group. Scanning proceeds in the following steps:
>
>      1. Given the complete input, match the regular expression
>      with the beginning of the input.
>      2. Find out which alternative matched.

you can use lastgroup, or lastindex:

http://effbot.org/zone/xml-scanner.htm

there's also a "hidden" ready-made scanner class inside the SRE module
that works pretty well for simple cases; see:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/457664

</F> 





From paddy3118 at netscape.net  Sat Jan  6 12:20:08 2007
From: paddy3118 at netscape.net (Paddy)
Date: 6 Jan 2007 09:20:08 -0800
Subject: Python re expr from Perl to Python
In-Reply-To: <1168103258.602286.146100@42g2000cwt.googlegroups.com>
References: <GzOnh.112$a81.91@nntpserver.swip.net>
	<1168103258.602286.146100@42g2000cwt.googlegroups.com>
Message-ID: <1168104008.910681.46800@38g2000cwa.googlegroups.com>


Paddy wrote:

> Michael M. wrote:
>
> > In Perl, it was:
> >
> >
> >    ## Example: "Abc | def | ghi | jkl"
> >    ##       -> "Abc ghi jkl"
> >    ## Take only the text betewwn the 2nd pipe (=cut the text in the 1st
> > pipe).
> >    $na =~ s/\ \|(.*?)\ \|(.*?)\ \|/$2/g;
> >
> >    ## -- remove [ and ] in text
> >    $na =~ s/\[//g;
> >    $na =~ s/\]//g;
> >    # print "DEB: \"$na\"\n";
> >
> >
> > # input string
> > na="Abc | def | ghi | jkl [gugu]"
> > # output
> > na="Abc ghi jkl gugu"
> >
> >
> > How is it done in Python?
>
> Here is how to do it without regexps in python.
> The first and last line below are all that are needed. The others show
> intermediate expressions that lead to the result.
>
> >>> from itertools import groupby
>
> >>> na="Abc | def | ghi | jkl [gugu]"
> >>> [(g[0], ''.join(g[1])) for g in groupby(na, lambda c: c not in ' \t|[]')]
> [(True, 'Abc'), (False, ' | '), (True, 'def'), (False, ' | '), (True,
> 'ghi'), (False, ' | '), (True, 'jkl'), (False, ' ['), (True, 'gugu'),
> (False, ']')]
> >>> [''.join(g[1]) for g in groupby(na, lambda c: c not in ' \t|[]') if g[0]]
> ['Abc', 'def', 'ghi', 'jkl', 'gugu']
>
> >>> ' '.join(''.join(g[1]) for g in groupby(na, lambda c: c not in ' \t|[]') if g[0])
> 'Abc def ghi jkl gugu'
> >>>
>
>
> - Paddy.

And I leave the deletion of def to the reader :-)

(i.e: I missed that bit and adding it in would make a long
comprehension too long to comprehend).



From agriff at tin.it  Tue Jan  9 02:49:56 2007
From: agriff at tin.it (Andrea Griffini)
Date: Tue, 09 Jan 2007 08:49:56 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <pan.2007.01.08.22.24.34.419033@REMOVE.THIS.cybersource.com.au>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
	<mailman.2414.1168264117.32031.python-list@python.org>
	<pan.2007.01.08.22.24.34.419033@REMOVE.THIS.cybersource.com.au>
Message-ID: <45a347ad$0$22395$4fafbaef@reader2.news.tin.it>

Steven D'Aprano wrote:

> That is total and utter nonsense and displays the most appalling
> misunderstanding of probability, not to mention a shocking lack of common
> sense.

While I agree that the programming job itself is not
a program and hence the "consider any possibility"
simply doesn't make any sense I can find a bit of
truth in the general idea that *in programs* it is
dangerous to be deceived by probability.

When talking about correctness (that should be the
main concern) for a programmer "almost never" means
"yes" and "almost always" means "not" (probability
of course for example kicks in about efficency).

Like I said however this reasoning doesn't work
well applied to the programming process itself
(that is not a program... as programmers are not
CPUs; no matter what bigots of software engineering
approaches are hoping for).
Private variables are about the programming process,
not the program itself; and in my experience the
added value of C++ private machinery is very low
(and the added cost not invisible).
When working in C++ I like much more using
all-public abstract interfaces and module-level
all-public concrete class definitions (the so
called "compiler firewall" idiom).

Another thing on the same "line of though" of
private members (that should "help programmers")
but for which I never ever saw *anything but costs*
is the broken idea of "const correctness" of C++.
Unfortunately that is not something that can be
avoided completely in C++, as it roots in the core
of the language.

Andrea


From practicalperl at gmail.com  Fri Jan 19 22:20:29 2007
From: practicalperl at gmail.com (Jm lists)
Date: Sat, 20 Jan 2007 11:20:29 +0800
Subject: **argv can't work
Message-ID: <fbe35f750701191920g4c28e44bjee5789ff346223b7@mail.gmail.com>

hello members,

See my script piece below:

def testB(shift,**argv):
    print "first argument is %s" %shift
    print "all other arguments are:",argv

testB('mails','Jen','Jen at att.com','Joe','Joe at aol.com')

It can't work at all.please help tell me the reasons.thanks.


From gagsl-py at yahoo.com.ar  Sat Jan 20 21:51:24 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 20 Jan 2007 23:51:24 -0300
Subject: Code reformater?
In-Reply-To: <eotjsg$ff68$1@zam602.zam.kfa-juelich.de>
References: <poe3r2ha92p6vrhtk9b2piso337djv4boo@4ax.com>
	<eotjsg$ff68$1@zam602.zam.kfa-juelich.de>
Message-ID: <7.0.1.0.0.20070120234347.03e54a30@yahoo.com.ar>

At Saturday 20/1/2007 14:37, Siggi wrote:

> > When I copy/paste Python code from the web, every so often,
> > the TABs are wrong, which means that the code won't work and I have to
> > manually reformat the code.
> >
> > Is there a code reformater that can parse the code to make it right?
> >
> > Thanks.
>
>Maybe my thread "help: code formatter, 08/01/2007 helps a little? Here are
>some of the answers:
>
>*
>Why don't you just write one? :)
>Seriously: Try.
>*
>Tools\scripts\reindent.py in your Python distribution.
>*
>Why, yes, there is:
>  http://lacusveris.com/PythonTidy/PythonTidy.python
>*
>tabnanny ?

As the indentation *is* significant in python, none of the above can 
help if you lose the indentation. Try to reconstruct this:

def foo():
if a>0:
if b>0:
print 1
print 2
else:
return 3
return 4

The tools may help to make the indentation consistent (tabs/8 
spaces/4 spaces/2 spaces mixed) or look better, but not to make it right.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From tactics40 at gmail.com  Mon Jan 22 17:53:01 2007
From: tactics40 at gmail.com (tac-tics)
Date: 22 Jan 2007 14:53:01 -0800
Subject: arrow keys don't work
Message-ID: <1169506381.452422.179070@11g2000cwr.googlegroups.com>

I've noticed that in Python 2.5, the interactive prompt does not
support intelligent use of arrow keys like 2.4 did (up/down for
previous/next statement, left/right for moving the cursor). What
exactly is the reason for this and is there an easier fix than
downgradinig to 2.4? Thanks.



From steve at holdenweb.com  Wed Jan 24 10:19:41 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 24 Jan 2007 15:19:41 +0000
Subject: Email attachments
Message-ID: <ep7teg$ua6$1@sea.gmane.org>

I'm having some trouble getting attachments right for all recipients, 
and it seems like Apple's mail.app is the pickiest client at the moment. 
It doesn't handle attachments that both Thunderbird and Outlook find 
perfectly acceptable.

Since the code I'm using is currently ugly and embedded, before I trim 
it down for posting could anyone who's successfully generated emails 
with attachments received by mail.app let me know if they had any 
problems along the way? Google hasn't given me much on this, but I'm not 
feeling very creative today.

Note that this is an important application: it sends out the invoices 
for PyCon sponsorship!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From researchbase at gmail.com  Sat Jan 20 11:12:14 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Sat, 20 Jan 2007 21:42:14 +0530
Subject: confused on python rpc with apache, is it possible?
In-Reply-To: <1169276359.477277.17930@q2g2000cwa.googlegroups.com>
References: <mailman.2912.1169227938.32031.python-list@python.org>
	<51ce8uF1k0tl5U1@mid.uni-berlin.de>
	<mailman.2931.1169273350.32031.python-list@python.org>
	<1169276359.477277.17930@q2g2000cwa.googlegroups.com>
Message-ID: <f81479dd0701200812v5f9ff1cem7247344f3676a6f9@mail.gmail.com>

> Use mod_python with some xmlrpc handler. There is more than one around.
> Google for them. That way you can keep Apache for both Python and PHP.
>
I am confused.
I have some documents on xml-rpc but none of them mentioned apache.
Krishnakant.


From harlinseritt at yahoo.com  Mon Jan  8 12:41:54 2007
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 8 Jan 2007 09:41:54 -0800
Subject: where is python on linux?
In-Reply-To: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
References: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
Message-ID: <1168278114.501189.104450@38g2000cwa.googlegroups.com>

Hi Frank,

Usually "Python" is installed in /usr/lib/python[VER] but you should be
able to call up /usr/bin/python without any difficulty.

Harlin Seritt


Frank Potter wrote:
> I installed fedora core 6 and it has python installed.
> But the question is, where is the executable python file?
> I can't find it so I come here for help.
> I want to config pydev for eclipse and I need to know where the
> ececutable python file is.
> Thank you!



From ms at cerenity.org  Wed Jan 31 19:37:49 2007
From: ms at cerenity.org (Michael)
Date: Thu, 01 Feb 2007 00:37:49 +0000
Subject: from future module!!!!!!!
References: <1169983511.674847.281290@s48g2000cws.googlegroups.com>
	<epi28q$ic4$1@ulysses.news.tiscali.de>
Message-ID: <45c135cd$0$8734$ed2619ec@ptn-nntp-reader02.plus.net>

Stargaming wrote:

> The 'from' clause is a keyword in python used for
> imports in the module namespace.

Typically, but in the case of "from __future__ ..." it actually changes the
logic of the interpreter/compiler. As a result if you intend to use any
features from __future__ you have to ensure that that directive comes first.
It looks like any other module on the surface, but it's a little special.

(This also means that if you intend to use any modules that use these
features you need to import it in your top level code as well)


Michael.


From brochu121 at gmail.com  Wed Jan 17 14:18:40 2007
From: brochu121 at gmail.com (David Brochu)
Date: Wed, 17 Jan 2007 14:18:40 -0500
Subject: Python-list Digest, Vol 40, Issue 215
In-Reply-To: <mailman.8595.1169061003.32030.python-list@python.org>
References: <mailman.8595.1169061003.32030.python-list@python.org>
Message-ID: <9583ed900701171118i59b3aa61r531a6e0828cf47db@mail.gmail.com>

How is it that when I try to send out a valid response to help someone with
their python issue I get flagged, but this guy can send out something
totally useless to the python community?

>
>
>
>
> ---------- Forwarded message ----------
> From: david.bostwick at chemistry.gatech.edu (David Bostwick)
> To: python-list at python.org
> Date: Wed, 17 Jan 2007 18:42:35 GMT
> Subject: Re: *POLL* How many sheeple believe in the 911 fairy tale and
> willing to accept an Orwellian doublespeak and enslavement world ?
> In article <1169058752.659674.6680 at s34g2000cwa.googlegroups.com>, "Robert
> Hicks" <sigzero at gmail.com> wrote:
> >Please, none of the real facts points to anything else except what
> >actually happened. Two planes hit two towers and they came down.
> >
>
> You're talking to the wind.  This is a conspiracy precisely because people
> deny the crackpots.  Denial of their "evidence" proves that there is a
> coverup.  Logic is not involved, only belief that doesn't respond to
> dissenting evidence.
>
>
>
>
> ---------- Forwarded message ----------
> From: "Carroll, Barry" <Barry.Carroll at psc.com>
> To: <st911 at rock.com>, <python-list at python.org>
> Date: Wed, 17 Jan 2007 10:50:20 -0800
> Subject: RE: *POLL* How many sheeple believe in the 911 fairy tale and
> willingto accept an Orwellian doublespeak and enslavement world ?
>
> > -----Original Message-----
> > From: st911 at rock.com [mailto:st911 at rock.com]
> > Sent: Wednesday, January 17, 2007 10:23 AM
> > To: python-list at python.org
> > Subject: Re: *POLL* How many sheeple believe in the 911 fairy tale and
> > willingto accept an Orwellian doublespeak and enslavement world ?
> >
> >
> > > ... buildings collapse all the time when you design to the
> cold-formed
> > > strength rather than the hot-formed strength of a material, then
> heat
> > > the material removing its tempered strength (which for steel occurs
> at
> > > much lower than usual flame temeratures).
> >
> > Actually, modern steel frame buildings have never collapsed from
> > kerosine fire.
> > Besides there are SERIOUS anomalies indicative of thermate and
> > explosives.
> > Yellow hot molten metal were seen trickling down less than hour after
> > the fires.
> > Red hot molten metal pools were seen in the rubble weeks after the
> > collapse.
> > The building and their contents pulverized to dust from the brisance
> of
> > very well
> > planted and hidden explosives. I was not aware that Alqaeda has
> > invisible man
> > technology past the security cameras.
> >
> > > And what did this rant have to do with any of the sci.* or
> programming
> > > newsgroups you posted it to?
> >
> > Your ignoramus is the exact reason why this has to be posted there.
> >
> > > David A. Smith
> >
> > And why did bldg 7 commit suicide. How was the boeing767 maneouvered
> > so close to the ground into pentagon?
> >
> > Where is the DNA to confirm the identities of 19 in the fairy tale?
> >
> > Do you work for the story writing agency ?
> >
> Ladies and Gentlemen:
>
> PLEASE take this discussion to a more appropriate forum.  There are many
>
> forums where people will be happy to debate this: physics, firefighting,
> metallurgy, geopolitics, etc.  This forum is about the Python
> programming language.  Let's keep it that way.
>
> Regards,
>
> Barry
> barry.carroll at psc.com
> 541-302-1107
> ________________________
> We who cut mere stones must always be envisioning cathedrals.
>
> -Quarry worker's creed
>
>
>
>
>
>
> ---------- Forwarded message ----------
> From: "Carroll, Barry" <Barry.Carroll at psc.com>
> To: "Robert Hicks" <sigzero at gmail.com>, <python-list at python.org>
> Date: Wed, 17 Jan 2007 10:53:06 -0800
> Subject: RE: *POLL* How many sheeple believe in the 911 fairy tale and
> willingto accept an Orwellian doublespeak and enslavement world ?
> > -----Original Message-----
> > From: Robert Hicks [mailto:sigzero at gmail.com]
> > Sent: Wednesday, January 17, 2007 10:33 AM
> > To: python-list at python.org
> > Subject: Re: *POLL* How many sheeple believe in the 911 fairy tale and
> > willingto accept an Orwellian doublespeak and enslavement world ?
> >
> > Please, none of the real facts points to anything else except what
> > actually happened. Two planes hit two towers and they came down.
> >
> Ladies and Gentlemen:
>
> PLEASE take this discussion to a more appropriate forum.  There are many
>
> forums where people will be happy to debate this: physics, firefighting,
> metallurgy, geopolitics, etc.  This forum is about the Python
> programming language.  Let's keep it that way.
>
> Regards,
>
> Barry
> barry.carroll at psc.com
> 541-302-1107
> ________________________
> We who cut mere stones must always be envisioning cathedrals.
>
> -Quarry worker's creed
>
>
>
>
>
>
> ---------- Forwarded message ----------
> From: "Robert Hicks" <sigzero at gmail.com>
> To: python-list at python.org
> Date: 17 Jan 2007 10:54:54 -0800
> Subject: Re: *POLL* How many sheeple believe in the 911 fairy tale and
> willingto accept an Orwellian doublespeak and enslavement world ?
> <snip>
> >
> > Regards,
> >
> > Barry
> > barry.carroll at psc.com
> > 541-302-1107
> > ________________________
> > We who cut mere stones must always be envisioning cathedrals.
> >
> > -Quarry worker's creed
>
> Sure, but did you actually post your phone number on USENET?
>
> Robert
>
>
>
>
>
> ---------- Forwarded message ----------
> From: "Emin" <emin.shopper at gmail.com>
> To: python-list at python.org
> Date: 17 Jan 2007 11:02:51 -0800
> Subject: Re: question about module resolution
> I put the lines you suggested in baz.py, but got an error:
>
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import baz
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "baz.py", line 3, in <module>
>     from .. import config
> ValueError: Attempted relative import in non-package
>
> On Jan 17, 11:20 am, Peter Otten <__pete... at web.de> wrote:
> > Emin wrote:
> > > I often find myself wanting to have a child module get some parameters
> > > defined in a parent module. For example, imagine  I have the following
> > > directory structure and want something in baz.py to look at a value in
> > > config.py. I end up putting in things like import sys;
> > > sys.path.append('../..'). Is there a better way?
> >
> > > foo/
> > >      __init__.py
> > >      config.py
> > >      bar/
> > >           __init__.py
> > >           baz.pyfrom __future__ import absolute_import
> > from .. import config
> >
> > Peter
>
>
>
>
>
> ---------- Forwarded message ----------
> From: "awel" <albert.wellens at gmail.com>
> To: python-list at python.org
> Date: 17 Jan 2007 11:03:15 -0800
> Subject: Re: Check a windows service
> Thanks for all 'cause you've really helped me
>
> Just one thing in the last line for the specific service, you' ve
> writted :
>
> >    print service
>
> but I think it is :
>
> >    print service.Caption
>
>
> Tim Golden a ?crit :
> > awel wrote:
> > > Sorry, but could you give me an example with a real service 'cause
> I've
> > > tried this script but nothings happened, no error, nothings ; even if
> I
> > > launch it in cmd prompt.
> >
> > Well, as that example said, it was designed to show
> > automatic services which are not running. If you don't
> > have any then nothing will show. I assumed you could
> > use this as a starting point.
> >
> > To list all services try this:
> >
> > <code>
> > import wmi
> >
> > c = wmi.WMI ()
> > for service in c.Win32_Service ():
> >   print service.Caption
> >
> > </code>
> >
> > To show a specific service:
> >
> > <code>
> > import wmi
> >
> > c = wmi.WMI ()
> > for service in c.Win32_Service (Caption="Task Scheduler"):
> >   print service
> >
> > </code>
> >
> > TJG
>
>
>
>
>
> ---------- Forwarded message ----------
> From: st911 at rock.com
> To: python-list at python.org
> Date: 17 Jan 2007 11:05:08 -0800
> Subject: Re: *POLL* How many sheeple believe in the 911 fairy tale and
> willing to accept an Orwellian doublespeak and enslavement world ?
>
> Robert Hicks wrote:
> > Please, none of the real facts points to anything else except what
> > actually happened. Two planes hit two towers and they came down.
>
> The issue is the causality of the towers coming down.
>
> A magician pulls appears to cast a spell
> and out comes a rabbit out of his hat. There will always be fools who
> will accept this causality and others who know better the laws of
> conservation.
>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070117/30c2c8ac/attachment.html>

From bdesth.quelquechose at free.quelquepart.fr  Thu Jan  4 05:22:19 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 04 Jan 2007 11:22:19 +0100
Subject: array of class
In-Reply-To: <1167782733.743870.228760@k21g2000cwa.googlegroups.com>
References: <mailman.2221.1167763760.32031.python-list@python.org>
	<459ad4f7$0$293$426a34cc@news.free.fr>
	<1167777053.152492.3460@v33g2000cwv.googlegroups.com>
	<459ae31f$0$294$426a74cc@news.free.fr>
	<1167782733.743870.228760@k21g2000cwa.googlegroups.com>
Message-ID: <459ccf34$0$308$426a74cc@news.free.fr>

Podi a ?crit :
>>>Or more compactly:
>>>
>>>words = [Word(w) for w in 'this is probably what you want'.split()]
>>>print words
>>
>>I didn't want to introduce yet some more "confusing" stuff !-)
> 
> 
> Indeed, the for loop is perfectly fine and totally readable. Let's save
> the "confusing stuff" to the Perl folks.
> 

This is not what I meant. I do like list comprehensions and use them a 
lot - and I don't find anything "perlish" here.


From klappnase at web.de  Tue Jan 16 05:03:46 2007
From: klappnase at web.de (klappnase)
Date: 16 Jan 2007 02:03:46 -0800
Subject: Segfault with tktreectrl on python-2.5 on linux
References: <1168884154.116074.308720@s34g2000cwa.googlegroups.com>
	<slrneqnlqh.1hks.ah@hugin-home1.muc.de>
Message-ID: <1168941826.062298.229080@51g2000cwl.googlegroups.com>

Anton Hartl schrieb:

<snip>
>
> Solutions:
>
>     a) convince Python developers to prefix ALL new (wrt. 2.5)
>        global symbols with a prefix like "_PyAST_" or equivalent;
>        this would be consistent with how it is done anyway,
>        unfortunately the new AST symbols deviate from this practise
>        (there are symbols like "Assert", "If", "Then", ...)
>
>  or b) apply an equivalent rule to the global symbols in
>        tktreectrl that are global by accident, i.e. because
>        of the way the library is structured and built
>

Anton, you're cool,

actually renaming Ellipsis to Py_Ast_Ellipsis in ast.c and Python-ast.c
seems to fix this.
What I don't understand, isn't it very likely that such things will
happen when names like "Ellipsis" or "Slice" and "Index" (which I also
found in Python-ast.c) are being used, or are the treectrl people doing
something they should avoid?
I think the answer to this might be important when deciding to whom I
should send a bug report :)

Thanks and best regards

Michael



From gagsl-py at yahoo.com.ar  Sun Jan  7 14:53:13 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 11:53:13 -0800
Subject: Traceback of hanged process
In-Reply-To: <mailman.2377.1168125259.32031.python-list@python.org>
References: <mailman.2377.1168125259.32031.python-list@python.org>
Message-ID: <1168199593.403835.147360@s34g2000cwa.googlegroups.com>

On 6 ene, 19:45, Hynek Hanke <h... at brailcom.org> wrote:

> please, how do I create a pythonic traceback from a python process that
> hangs and is not running in an interpreter that I executed manually
> or it is but doesn't react on CTRL-C etc? I'm trying to debug a server
> implemented in Python, so I need some analog of 'gdb attach' for C.

On Windows, Pythonwin has an option "Break into running code".
Try starting the script with python -i, and send it a signal..

-- 
Gabriel Genellina



From oliver at obeattie.com  Fri Jan  5 07:14:55 2007
From: oliver at obeattie.com (oliver at obeattie.com)
Date: 5 Jan 2007 04:14:55 -0800
Subject: Encoding / decoding strings
Message-ID: <1167999295.242042.79470@s34g2000cwa.googlegroups.com>

Hey Everyone,

Was just wondering if anyone here could help me. I want to encode (and
subsequently decode) email addresses to use in URLs. I believe that
this can be done using MD5.

I can find documentation for encoding the strings, but not decoding
them. What should I do to encode =and= decode strings with MD5?

Many Thanks in Advance,
Oliver Beattie



From greg at cosc.canterbury.ac.nz  Sat Jan 27 03:31:20 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sat, 27 Jan 2007 21:31:20 +1300
Subject: ANN: Pyrex 0.9.5
Message-ID: <mailman.3233.1169916878.32031.python-announce-list@python.org>

Pyrex 0.9.5 is now available:

   http://www.cosc.canterbury.ac.nz/~greg/python/Pyrex/

Warning Elimination

Extensive changes have been made in this version in an
effort to eliminate most of the C compiler warnings that
used to occur when compiling with distutils.

There are also numerous other enhancements and bug fixes.
See the CHANGES file in the distribution or on the web
site for a full list.

What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From deets at nospam.web.de  Fri Jan 12 09:40:44 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 12 Jan 2007 15:40:44 +0100
Subject: What about this?
References: <1168525050.536736.74590@i39g2000hsf.googlegroups.com>
	<50n9kcF1g30l4U2@mid.individual.net>
	<1168612073.635206.84620@s34g2000cwa.googlegroups.com>
Message-ID: <50pkvcF1gecd0U1@mid.uni-berlin.de>

Dr. Who wrote:

> What's more amazing is that anyone would click on the link at all given
> the increasing number of website that provide hidden content that tries
> to deliver spyware or viruses just by getting visitors.

Me LinuxBoy, me not in danger... SCNR :)

Diez


From http  Sat Jan 13 02:37:20 2007
From: http (Paul Rubin)
Date: 12 Jan 2007 23:37:20 -0800
Subject: MP3 decoder module?
References: <7x4pqvste8.fsf@ruckus.brouhaha.com> <eo99c3$rhk$1@blue.rahul.net>
Message-ID: <7x4pqv1iof.fsf@ruckus.brouhaha.com>

Terry Carroll <carroll at tjc.com> writes:
> As I read the Pymedia docs, you can use it to decode frames from an
> MP3, and operate on the decoded sound data.
> 
> See http://pymedia.org/tut/dump_wav.html for a discussion.

Hmm, thanks, it looks like there's more there than I thought at first,
tough still pretty confusing.  I'll look at it some more.  Meanwhile
I'm just doing a semi-manual kludge, looking at a file visually with
audacity to figure out the chop point, then chopping all similar files
(I have a bunch of sets of files that are related to each other and
use the same chop points) with file.truncate.  This is extremely fast
but seems to sometimes cut an mp3 frame in the middle.  So I'd like to
figure out more accurately where the exact frame boundaries are.
Chopping in the middle gets a harmless error message from the mpg123
software decoder but might have some worse effect with a hardware
decoder.  I have some cheap portable players that I can try it on but
I haven't done that yet.

I'm surprised there's not more code like this around.


From tjreedy at udel.edu  Wed Jan 10 13:21:00 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 10 Jan 2007 13:21:00 -0500
Subject: Announcement -- ZestyParser
References: <1168407920.281020.147680@k58g2000hse.googlegroups.com>
Message-ID: <eo3aqa$ntr$1@sea.gmane.org>


"Adam Atlas" <adam at atlas.st> wrote in message 
news:1168407920.281020.147680 at k58g2000hse.googlegroups.com...
| This has been on Cheese Shop for a few weeks now, being updated now and
| then, but I never really announced it. I just now put up a real web
| page for it, so I thought I'd take the opportunity to mention it here.
|
| ZestyParser is my attempt at a flexible toolkit for creating concise,
| precise, and Pythonic parsers. None of the existing packages really met
| my needs; Pyparsing came the closest, but I find it still has some
| shortcomings. ZestyParser is simply an abstract implementation of how I
| think about parsing; I don't expect it'll meet everyone's parsing
| needs, but I hope it'll make typical parsing tasks more joyful.
|
| Here's the web page:
| http://adamatlas.org/2006/12/ZestyParser/
| Here's the Cheese Shop page:
| http://cheeseshop.python.org/pypi/ZestyParser
| (I recommend you get the source package, as it includes the examples.)

I would like to look at the examples online (along with the doc file)
before downloading this and setuptools and installing, so I can see what
it actually looks like in use.

tjr





From usenet at marlowa.plus.com  Wed Jan 17 11:35:45 2007
From: usenet at marlowa.plus.com (Andrew Marlow)
Date: Wed, 17 Jan 2007 17:35:45 +0100 (CET)
Subject: cannot import libxml2 python module on windoze using activePerl or
	Python IDLE
Message-ID: <eolj91$p6o$1@aioe.org>

guys,

I have been using libxml2 with python with no problems for
just over a week but now I come to see if my script will work
in someone else's environment and the libxml2 import fails.
I am using the python that comes with cygwin. When I try using
ActivePython (2.3) or Python IDLE (2.5) there does not seem to
be a libxml2 module there.

I thought libxml2 was a std python module.
But it would seem not. I need help tracking it down please.
I am using windoze XP (not my choice).

I am not sure how python packages get installed on windoze.
I can't find a file libxml2.py for activePython etc
so I cannot even begin an install. I presume python's libxml
builds on the C libs libxml2.dll and iconv.dll so I have installed
those into the python DLL directory. I think this will be
needed at some point.

Please can anyone help?

Regards,

Andrew Marlow
-- 
There is an emerald here the size of a plover's egg!
Don't top-post  http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please      http://www.expita.com/nomime.html


From citronelu at yahoo.com  Mon Jan  8 16:01:30 2007
From: citronelu at yahoo.com (citronelu at yahoo.com)
Date: 8 Jan 2007 13:01:30 -0800
Subject: Fwd: Execute binary code
In-Reply-To: <mailman.2447.1168289572.32031.python-list@python.org>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<EOSdneXxmrS6OT_YnZ2dnUVZ_q7inZ2d@comcast.com>
	<1168289145.319706.199950@11g2000cwr.googlegroups.com>
	<4866bea60701081251we2bf7f3vb55a285ee20e91f6@mail.gmail.com>
	<mailman.2447.1168289572.32031.python-list@python.org>
Message-ID: <1168290090.137259.324360@i15g2000cwa.googlegroups.com>


Chris Mellon wrote:
> Writing to a temp file will be at least 3 times as easy and twice as
> reliable as any other method you come up with.

I'm not disputing that, but I want to keep a piece of code (a parser
for Oracle binary dumps, that I didn't wrote) out of foreign hands, as
much as possible. Using a TEMP directory is not "stealth" enough.



From exarkun at divmod.com  Wed Jan 31 22:21:00 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 31 Jan 2007 22:21:00 -0500
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <eprlrr$aee$1@panix3.panix.com>
Message-ID: <20070201032100.25807.1381560506.divmod.quotient.5451@ohm>

On 31 Jan 2007 19:12:59 -0800, Aahz <aahz at pythoncraft.com> wrote:
>In article <mailman.3386.1170299364.32031.python-list at python.org>,
>Jean-Paul Calderone  <exarkun at divmod.com> wrote:
>>
>>You misunderstand.  I wasn't expressing a lack of confidence in Python
>>threads, but in the facility with which they can be used by programmers.
>
>Based on my admittedly limited experience, I say the same about Twisted.
>Although I was able to bring up a Twisted 1.1 web server in a hurry under
>extreme pressure (15 minutes before a PyCon presentation), I have never
>been able to even get Twisted 2.0 installed.

FWIW, this is probably even easier than when you last tried it:

    exarkun at kunai:~$ twistd -n web --port 8080 --path /tmp
    2007-01-31 22:19:34-0500 [-] Log opened.
    2007-01-31 22:19:34-0500 [-] twistd 2.5.0+r19505 (/usr/bin/python 2.4.3) starting up
    2007-01-31 22:19:34-0500 [-] reactor class: <class 'twisted.internet.selectreactor.SelectReactor'>
    2007-01-31 22:19:34-0500 [-] twisted.web.server.Site starting on 8080
    2007-01-31 22:19:34-0500 [-] Starting factory <twisted.web.server.Site instance at 0xb79c646c>

>Software is hard.

But I absolutely agree with this point, anyway :)  Software is _crazy_
hard.  I merely dispute the claim that threads are somehow _easier_. :)

Jean-Paul


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Jan 10 17:59:01 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 10 Jan 2007 23:59:01 +0100
Subject: Read from database, write to another database, simultaneously
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
Message-ID: <50l9dlF1fuc1sU1@mid.individual.net>

Sean Davis wrote:

> The author of one of the python database clients mentioned that
> using one thread to retrieve the data from the oracle database and
> another to insert the data into postgresql with something like a
> pipe between the two threads might make sense, keeping both IO
> streams busy.

IMHO he's wrong. Network interaction is quite slow compared with CPU
performance, so there's no gain (maybe even overhead due to thread
management and locking stuff). That's true even on multiprocessor
machines, not only because there's almost nothing to compute but
only IO traffic. CMIIW.

Using multiplexing, you'll get good results with simple code without
the danger of deadlocks. Have a look at asyncore (standard library)
or the Twisted framework -- personally, I prefer the latter.

Regards,


Bj?rn

-- 
BOFH excuse #194:

We only support a 1200 bps connection.



From pavlovevidence at gmail.com  Fri Jan  5 20:45:11 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 5 Jan 2007 17:45:11 -0800
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1168041915.558354.110570@s80g2000cwa.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<1167974907.497878.61070@i15g2000cwa.googlegroups.com>
	<1168041915.558354.110570@s80g2000cwa.googlegroups.com>
Message-ID: <1168047910.987397.13860@s34g2000cwa.googlegroups.com>


Fuzzyman wrote:
> Carl Banks wrote:
> > jeremito wrote:
> > > I am writing a class that is intended to be subclassed.  What is the
> > > proper way to indicate that a sub class must override a method?
> >
> > You can't (easily).
> >
>
> Well...
>
> How about not defining it on the base class, but check in the
> constructor that the attribute exists and that it is of type
> FunctionType ?

That still delays the check until the object is created.

You'd have to use metaclass programming to check this during class
creation time.


Carl Banks



From cjw at sympatico.ca  Wed Jan 31 10:32:29 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Wed, 31 Jan 2007 10:32:29 -0500
Subject: Conditional expressions - PEP 308
In-Reply-To: <1170228929.612844.153730@p10g2000cwp.googlegroups.com>
References: <mailman.3325.1170193923.32031.python-list@python.org>
	<1170228929.612844.153730@p10g2000cwp.googlegroups.com>
Message-ID: <epqcqh$2jl$1@sea.gmane.org>

Paddy wrote:
> On Jan 30, 9:51 pm, "Colin J. Williams" <c... at sympatico.ca> wrote:
>> It would be helpful if the rules of the game were spelled out more clearly.
>>
>> The conditional expression is defined as X if C else Y.
>> We don't know the precedence of the "if" operator.  From the little test
>> below, it seem to have a lower precedence than "or".
>>
>> Thus, it is desirable for the user to put the conditional expression in
>> parentheses.
>>
>> Colin W.
>>
>> # condExpr.py
>> # PEP 308 defines a conditional expression as X if C else Y
>> # but we don't know exactly what X is supposed to be.
>> # It doesn't seem to be spelled out in the syntax.
>>
>> def main():
>>    names= ['abc', 'def', '_ghi', 'jkl', '_mno', 'pqrs']
>>    res= ''
>>    for w in names:
>>         res= res + w if w[0] != '_' else ''
>>         z= 1
>>    print 'res1:', res
>>
>>    res= ''
>>    for w in names:
>>         res= res + (w if w[0] != '_' else '')
>>         z= 1
>>    print 'res2:', res
>>
>> if __name__ == '__main__':
>>    main()
>>
>> Result:
>> [Dbg]>>>
>> res1: pqrs
>> res2: abcdefjklpqrs
> 
> But to give them credit though, in Whats new in Python 2.5: PEP 308,
> they do mention that as a matter of style you should parenthesise the
> if-expression, and the example given consistes of just a simple
> assignment of the if-expr to a name.
> - Paddy.
> 
Yes, I agree.  The ternary operator is a step forward.

I was trying to make the point that the parentheses are necessary if X 
is more than a simple value.  It's a pity that one finds this out by 
experiment rather than definition.

Colin W.



From mensanator at aol.com  Sun Jan 21 16:38:34 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: 21 Jan 2007 13:38:34 -0800
Subject: Python Windows Editors
In-Reply-To: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
Message-ID: <1169415514.562496.248950@a75g2000cwd.googlegroups.com>


W. Watson wrote:
> I downloaded python-2.5.msi and installed it. I believe its editor is IDE. I
> understand there's a Win editor called pythonwin. I believe it's in the
> download pywin32-210.win32-py2.5.exe, but I'm not sure if this exe file has
> just the editor or all of Python. Comments? If not how do I get the
> PythonWin editor by itself?
>
> BTW, one of the features I did not like of IDE is the limited file Print
> command. It puts everything in 16pt type, and gives no choice over what
> pages should be printed. Maybe there's an option?

Print your files from Notepad, after all, they're just text files.
But IDLE has more usefull Formatting options.

>
>           Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
>               (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
>                Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet
>
>                 Two laws Newton and Einstein didn't discover:
>                   1. Time is money.
>                   2. Matter will be damaged in direct proportion
>                      to its value.
> -- 
>                      Web Page: <home.earthlink.net/~mtnviews>



From bignose+hates-spam at benfinney.id.au  Wed Jan 31 18:34:40 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 01 Feb 2007 10:34:40 +1100
Subject: Sorting a dict (was: How to sort using hash's key?)
References: <1170276870.45c102069d9e6@webmail.3web.com>
Message-ID: <87d54uvkhb.fsf@benfinney.id.au>

JoJo <Jstone at 3web.com> writes:

> I want to sort a dict via its key,but I have no idea on how to do
> it.

The 'dict' type is explicitly unordered. Sorting it isn't
possible. (Also note that a 'hash' is something entirely different in
Python.)

You can create your own type, inheriting from 'dict', that has the
behaviour you want. See the Python Cookbook for some examples.

    <URL:http://aspn.activestate.com/ASPN/Python/Cookbook/>

-- 
 \     "I cannot conceive that anybody will require multiplications at |
  `\   the rate of 40,000 or even 4,000 per hour ..."  -- F. H. Wales, |
_o__)                                                             1936 |
Ben Finney



From tiedon_jano at hotmail.com  Tue Jan 16 13:06:51 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Tue, 16 Jan 2007 18:06:51 GMT
Subject: A note on heapq module
In-Reply-To: <1168970329.751502.57320@11g2000cwr.googlegroups.com>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<1168970329.751502.57320@11g2000cwr.googlegroups.com>
Message-ID: <%u8rh.227$%i7.3@read3.inet.fi>

bearophileHUGS at lycos.com kirjoitti:
> I think the sort has to be simplified, otherwise it can't keep the heap
> invariant...
> 
> def sort(self):
>     self.h.sort()
> 
> Bye,
> bearophile
> 
And __repr__ should be something like this:
=========
     def __repr__(self):
         if self.h:
             return "Heap(%s)" % self.h
         else:
             return "Heap()"
==========
to make it compatible with versions earlier than 2.5

Cheers,
Jussi


From nszabolcs at gmail.com  Tue Jan 30 18:54:34 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 30 Jan 2007 15:54:34 -0800
Subject: data design
In-Reply-To: <45bfbcc3$0$30950$426a74cc@news.free.fr>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
	<1170183985.871094.155720@q2g2000cwa.googlegroups.com>
	<45bfbcc3$0$30950$426a74cc@news.free.fr>
Message-ID: <1170201274.580256.182740@v45g2000cwv.googlegroups.com>


> Hurray for yaml! A perfect fit for my need! And a swell tool!
> Thanks a lot!

i warn you against yaml
it looks nice, but the underlying format is imho too complex (just 
look at their spec.)

you said you don't want python source because that's too complex for 
the users.
i must say that yaml is not easier to use than python data structures.

if you want userfriedly config files then ConfigParser is the way to 
go.

if you want somthing really simple and fast then i'd recommend s-
expressions of lisp

also here is an identation based xml-like tree/hierarchical data 
structure syntax:
http://www.scottsweeney.com/projects/slip/



From universal_used at hotmail.com  Mon Jan 22 15:03:58 2007
From: universal_used at hotmail.com (questions?)
Date: 22 Jan 2007 12:03:58 -0800
Subject: Are there sprintf in Python???
Message-ID: <1169496238.925052.311660@l53g2000cwa.googlegroups.com>

Are there any sprintf in Python?
I know you can print to files(or redefine sys.stout) and later open the
file content.

Are there similar function to sprintf in C?

Thanks



From emin.shopper at gmail.com  Thu Jan 11 14:12:30 2007
From: emin.shopper at gmail.com (Emin)
Date: 11 Jan 2007 11:12:30 -0800
Subject: what is the idiom for copy lots of params into self?
In-Reply-To: <mailman.2574.1168522814.32031.python-list@python.org>
References: <1168469214.452389.221180@p59g2000hsd.googlegroups.com>
	<1168520386.457345.23680@i39g2000hsf.googlegroups.com>
	<mailman.2574.1168522814.32031.python-list@python.org>
Message-ID: <1168542749.703729.308740@o58g2000hsb.googlegroups.com>

Thanks, that looks like what I wanted.

On Jan 11, 8:36 am, "Fredrik Lundh" <fred... at pythonware.com> wrote:
> "Emin" <emin.shop... at gmail.com> wrote:
> > What made me ask the question in my original post was not so much that
> > I had to loop over the names I wanted to save, but whether it's okay to
> > mess with self.__dict__ or if there is another way I should be
> > assigning to self.   http://effbot.org/pyref/setattr
> 
> </F>



From mattheww at chiark.greenend.org.uk  Thu Jan 25 13:08:34 2007
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 25 Jan 2007 18:08:34 +0000 (GMT)
Subject: Thoughts on using isinstance
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<1169656371.689791.216360@v33g2000cwv.googlegroups.com>
	<zHg*rKEBr@news.chiark.greenend.org.uk>
	<45b7b73b$0$391$426a74cc@news.free.fr>
Message-ID: <sgv*iYJBr@news.chiark.greenend.org.uk>

Bruno Desthuilliers  <bdesth.quelquechose at free.quelquepart.fr> wrote:
> Matthew Woodcraft a ?crit :

>> Adding the validation code can make your code more readable, in that
>> it can be clearer to the readers what kind of values are being
>> handled.

> This is better expressed in the docstring. And if it's in the
> docstring, you can't be blamed for misuse.

I certainly agree that the description of the function's requirements on
its parameters is best placed in the docstring.

This is another place where the "don't validate, just try running the
code anyway" approach can cause problems: what should you put in the
docstring?

I don't think anyone would like to be fully explicit about the
requirements: you'd end up having to write things like "A string, or at
least anything that's iterable and hashable and whose elements are
single character strings, or at least objects which have an upper()
method which ...".

So in practice you end up writing "a string", and leave the rest of the
'contract' implicit. But that can lead to difficulties if people working
on the code have different ideas of what that implicit contract is -- is
it "a string, or anything else which works with the current
implementation", or perhaps "you may pass something other than a string
so long as you take responsibility for making it support all the
necessary operations, even if the implementation changes", or is there
some project-wide convention about how much like a string such things
have to be?

I think this kind of vagueness can work well within a lump of code which
is maintained as a piece, but it's good to divide up programs into
components with more carefully documented interfaces. And it's at that
level that I think doing explicit parameter validation can be helpful.


>> If you validate, you can raise an exception from the start of your
>> function with a fairly explicit message. If you don't validate,
>> you're likely to end up with an exception whose message is something
>> like 'iteration over non-sequence', and it might be raised from some
>> function nested several levels deeper in.

> And what is the stack backtrace for, actually ?

I'm not sure that you intended that as a serious question, but I'll
answer it anyway.

In an ideal world, the stack backtrace is there to help me work with
code that I'm maintaining. It isn't there to help me grub around in the
source of someone else's code which is giving me an unhelpful error
message. Just as, in an ideal world, I should be able to determine how
to correctly use someone else's code by reading its documentation rather
than its source.

I think this is a 'quality of implementation' issue. When you start
using Python you pretty rapidly pick up the idea that a message like
'len() of unsized object' from (say) a standard library function
probably just means that you didn't pass the value you intended to; but
that doesn't mean it's a good error message. These things do add up to
make the daily business of programming less efficient.


>> The latter can be harder for the user of your function to debug (in
>> particular, it may not be easy to see that the problem was an invalid
>> parameter to your function rather than a bug in your function itself,
>> or corrupt data elsewhere in the system).

> docstrings and unit-tests should make it clear.

I don't see that either of those things remove the issues I described.


> Now if one want to have to declare everything three times and write
> layers and layers of adapters and wrappers, well, he knows where to
> find Java !-)

Right. But using Python there is a position between 'writing layers and
layers of adapters and wrappers' and 'never validate anything': put
explicit checks in particular functions where they're likely to do most
good.

For example, it's often helpful to explicitly validate if you're going
to store the parameters away and do the actual work with them later on.
Consider what happens if you pass garbage to urllib2.install_opener():
you'll get an obscure error message later on from a urlopen() call,
which will be rather less convenient to investigate than an error from
install_opener() would have been.


>> This might well lead to your program apparently completing
>> successfully but giving the wrong result (which is usually the kind
>> of error you most want to avoid).

> Compared to what C or C++ can do to your system, this is still a
> pretty minor bug - and probably one of the most likely to be detected
> very early

I disagree. What C or C++ will do, very often, is produce a segmentation
fault. That may well turn out to be hard to debug, but it's considerably
more likely to be detected early than a successful exit status with
incorrect output.

-M-


From shitizb at yahoo.com  Tue Jan 23 10:10:46 2007
From: shitizb at yahoo.com (Shitiz Bansal)
Date: Tue, 23 Jan 2007 07:10:46 -0800 (PST)
Subject: IE Toolbar (OT)
In-Reply-To: <1169563580.634000.122540@v45g2000cwv.googlegroups.com>
Message-ID: <812508.48255.qm@web53807.mail.yahoo.com>

Hi,
I need to build a toolbar for internet explorer which will have an embedded paintbrush like application. The user should be able to draw on the drawing canvas of that application and submit to post his drawings on my server.
I have built up a toolbar and a standalone paintbrush app in VC++. However I am unable to embed my application into the toolbar( I want it to show as a part of ie and not a separate window). I usually work with scripting languages liek python and ruby and am new to VC++.
Please advise me on any literature/pointers to solve my problem.
Thanks,
Shitiz

 
---------------------------------
Cheap Talk? Check out Yahoo! Messenger's low PC-to-Phone call rates.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070123/c8c81a3d/attachment.html>

From horpner at yahoo.com  Tue Jan 30 13:33:26 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 30 Jan 2007 19:33:26 +0100
Subject: Help me understand this
References: <1170140737.027139.14920@h3g2000cwc.googlegroups.com>
	<pan.2007.01.30.07.47.33.15637@REMOVEME.cybersource.com.au>
	<1170146755.446429.90720@v45g2000cwv.googlegroups.com>
	<mailman.3317.1170178783.32031.python-list@python.org>
Message-ID: <slrnerv3mj.1mg.horpner@FIAD06.norwich.edu>

On 2007-01-30, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> En Tue, 30 Jan 2007 06:34:01 -0300, Beej <beej at beej.us> escribi?:
>
>> But here's one I still don't get:
>>
>>>>> type(2)
>> <type 'int'>
>>>>> type((2))
>> <type 'int'>
>>>>> (2).__add__(1)
>> 3
>>>>> 2.__add__(1)
>>   File "<stdin>", line 1
>>     2.__add__(1)
>>             ^
>> SyntaxError: invalid syntax
>
> It appears to be a bug, either in the grammar implementation, or in the  
> grammar documentation.
> These are the relevant rules:
>
> attributeref ::= primary "." identifier
>
> primary ::= atom | attributeref | subscription | slicing | call
>
> atom ::= identifier | literal | enclosure
>
> literal ::= stringliteral | integer | longinteger | floatnumber |  
> imagnumber
>
> An integer is a primary so 2.__add(1) should be valid.

Not if the tokenizer passes the parser a float.

-- 
Neil Cerutti


From cliff at develix.com  Wed Jan 24 14:37:58 2007
From: cliff at develix.com (Cliff Wells)
Date: Wed, 24 Jan 2007 11:37:58 -0800
Subject: Type casting a base class to a derived one?
In-Reply-To: <4866bea60701241057t13776d34ya516c2c24e7119bb@mail.gmail.com>
References: <mailman.2571.1168518354.32031.python-list@python.org>
	<slrneqcgve.1n0.horpner@FIAD06.norwich.edu>
	<4866bea60701110641n5eb4cc57uf5967aebcfd7790d@mail.gmail.com>
	<1169664145.4910.22.camel@portable-evil>
	<4866bea60701241057t13776d34ya516c2c24e7119bb@mail.gmail.com>
Message-ID: <1169667478.4910.52.camel@portable-evil>

On Wed, 2007-01-24 at 12:57 -0600, Chris Mellon wrote:

> 
> In Python, you can do this simply by re-assigning the __class__. I'm
> not convinced that your type system makes sense, here though. Any
> reasonable ORM should be able to persist and reload an object without
> losing the type information. Perhaps it's just a blind spot in the way
> I think about types. Assuming that the limitations of your ORM are
> external and out of your control, I would still ensure that whatever
> generic objects are being loaded from the ORM are converted into
> "real" objects of the correct type as soon as possible. For example,
> if you're persisting a file, you might just save the filename, and
> your ORM might return a string of the filename. I would want to
> convert that back into a file object ASAP, rather than writing all my
> code to accept either a FLO or a string and converting then.
> 
> If you know what to upcast something to, then you know what type it
> is. If you know what type it is, then (in Python) you can simply
> assume it is of that type.

Probably being more specific would help in this case ;-)

What I'm doing is implementing an object-publishing mechanism in my
template engine (Breve).  The type decision isn't known until the moment
of rendering (i.e. in the template itself).  Say for instance a set of
records is pulled from the ORM (SQLAlchemy in this case) and that these
records represent articles in a blog.  These records, until they hit the
template, have no real representation in HTML.  The decision about how
to present them is up to the template.  The dispatch mechanism I
referred to earlier is a way that I allow users of the template system
to register how a particular object should be rendered in HTML (a
"flattener").  This allows commonly represented objects to be used
without a lot of template clutter.
However, if you consider the case of a blog, then if the template
receives a list of articles, it would seem reasonable to present those
articles in at least two ways: first as a table of contents in the page
gutter, and then perhaps as two or three summaries in the main part of
the page.  But this isn't known to the lower layers of the application,
only to the template.  Therefore it would be nice if the template user
could register two classes with the flattener, both representations of
the original object but simply with a different type.  

I'll give a concrete example:

class Person: # assume this is something from the ORM
    name = "Kenny"

class PersonRow ( Person ):
    pass

def flatten_person ( p ):
    return "<span>omg, you've killed %p</span>" % p.name

def flatten_personrow ( p ):
    return "<tr><td>%s</td></tr>" % p.name

register_flattener ( PersonRow, flatten_personrow )
register_flattener ( Person, flatten_person )


Now, assuming a list of Person records were passed in as 'persons', then
in the template the template author could simply use:

div [
    # show the first person
    persons [ 0 ],

    # show a table of all persons
    table [    
        [ PersonRow ( p ) for p in persons ]
    ]
]


> What you're describing is a disjoint between your actual type system
> (that is, the one you have in code) and your theoretical type system
> (the one that you model your code around). To me, this is a huge red
> warning flag.

What I'm describing is a disjoint between how I want my template engine
to be used (I tend to build backwards, writing the desired template code
and then the engine code to support that use) and what can be easily and
efficiently achieved.  But yes, in a way you are correct since my
theoretical type system is constrained by Python's type system (Breve
templates are Python expressions).

That being said, I'm certain I'll come up with a solution that doesn't
bug me too much, it's just that the "obvious" solution doesn't exist
(type casting).

> I'm arguing against the idea that it makes sense, in Python, to
> upcast.

I think it's definitely a corner-case, but I'd be reluctant to claim it
would never be of use.

> I agree, but without a use case it's hard to understand the limits and
> needs of a requirement. So if you can't think of a need for a feature,
> it becomes difficult to understand how you might implement that
> feature.

Certainly.  Several years of using Python has never suggested a use to
me prior to this.

Regards,
Cliff




From bthom at cs.hmc.edu  Fri Jan 12 15:40:42 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Fri, 12 Jan 2007 12:40:42 -0800
Subject: modules...n methods
In-Reply-To: <50pst9F1h5hj5U1@mid.individual.net>
References: <1168620496.520506.296330@q2g2000cwa.googlegroups.com>
	<50pst9F1h5hj5U1@mid.individual.net>
Message-ID: <36367A62-197D-4EE0-9792-379A65D00C29@cs.hmc.edu>


On Jan 12, 2007, at 8:56 AM, Bjoern Schliessmann wrote:

> lee wrote:
>
>> whats the way to read the sourcecode of methods
>
> Easy. Look up the .py file and open it in an editor of your choice.
> Those files are, for example, in "/usr/lib/python".
>
>> and built in functions?

This becomes a lot easier if you use IPython (which embellishes the  
python shell in many useful ways). For instance, I did a "dir 
(__builtins__)" to find out what some of the builtin functions were.  
One was called "zip". Here's what I do in IPython to get help on that  
function:

In [2]: zip??
Type:           builtin_function_or_method
Base Class:     <type 'builtin_function_or_method'>
String Form:    <built-in function zip>
Namespace:      Python builtin
Docstring [source file open failed]:
     zip(seq1 [, seq2 [...]]) -> [(seq1[0], seq2[0] ...), (...)]

     Return a list of tuples, where each tuple contains the i-th element
     from each of the argument sequences.  The returned list is  
truncated
     in length to the length of the shortest argument sequence.

Note that IPython's prompt is (by default) different than pythons--- 
the "In[<some number>]:". Any identifier you have a question about  
will produce summary info via "<identifier>?" and summary + source  
via "<identifier>??".

HTH
--b


From peterbe at gmail.com  Fri Jan  5 10:59:57 2007
From: peterbe at gmail.com (peterbe at gmail.com)
Date: 5 Jan 2007 07:59:57 -0800
Subject: elementtree.SimpleXMLWriter and xmlcharrefreplace
Message-ID: <1168012797.140846.159160@q40g2000cwq.googlegroups.com>

I'll try to explain my problem with code.
The problem is the output

msg = u"S?dert?lje & Bor?s" # latin1 unicode string with a &

from elementtree.SimpleXMLWriter import XMLWriter
from cStringIO import StringIO
out = StringIO()
w = XMLWriter(out)
body = w.start("body")
w.element("text", msg)
w.close(body)
return out.getvalue()

Here's the output I get:
<body><text>S&#246;dert&#228;lje &#38;amp; Bor&#229;s</text></body>
Here's what I would want and expect:
<body><text>S&#246;dert&#228;lje &amp; Bor&#229;s</text></body>

Notice that & is converted to &#38;amp; when it should be &amp; or &38;
only.



From cvanarsdall at mvista.com  Wed Jan 10 16:04:34 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 10 Jan 2007 13:04:34 -0800
Subject: Parallel Python
In-Reply-To: <eo3eqs$icv$1@gemini.csx.cam.ac.uk>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>	<mailman.2408.1168248992.32031.python-list@python.org>	<Xns98B269DCC12Fduncanbooth@127.0.0.1>	<entr6s$ovo$1@news.albasani.net>	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>	<1168452879.866265.36880@i39g2000hsf.googlegroups.com>	<eo3bgm$c98$1@gemini.csx.cam.ac.uk>	<mailman.2544.1168455985.32031.python-list@python.org>
	<eo3eqs$icv$1@gemini.csx.cam.ac.uk>
Message-ID: <45A554E2.9040809@mvista.com>

Just as something to note, but many HPC applications will use a 
combination of both MPI and threading (OpenMP usually, as for the 
underlying thread implementation i don't have much to say).  Its 
interesting to see on this message board this huge "anti-threading" 
mindset, but the HPC community seems to be happy using a little of both 
depending on their application and the topology of their parallel 
machine.  Although if I was doing HPC applications, I probably would not 
choose to use Python but I would write things in C or FORTRAN. 

What I liked about python threads was that they were easy whereas using 
processes and IPC is a real pain in the butt sometimes.  I don't 
necessarily think this module is the end-all solution to all of our 
problems but I do think that its a good thing and I will toy with it 
some in my spare time.  I think that any effort to making python 
threading better is a good thing and I'm happy to see the community 
attempt to make improvements.  It would also be cool if this would be 
open sourced and I'm not quite sure why its not.

-carl
 

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From deets at nospam.web.de  Sat Jan  6 06:48:38 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 06 Jan 2007 12:48:38 +0100
Subject: PDF rendering toolkit?
In-Reply-To: <mailman.2348.1168030338.32031.python-list@python.org>
References: <mailman.2348.1168030338.32031.python-list@python.org>
Message-ID: <509gkmF1eufvtU1@mid.uni-berlin.de>

> I'm looking for a tool to take an actual .pdf file and display it in a
> window (I'm using wxwidgets at the moment)

No idea if there is a one-shot-kills-them-all solution out there - but 
if you have a way to go for windows, you might checkout PyQt and PyKDE 
to embed a kpfd-view in a window of yours.

I agree that it is less than desirable to switch toolkits - but if you 
_have_ to...

Diez


From gert.cuykens at gmail.com  Sun Jan 21 18:07:48 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Mon, 22 Jan 2007 00:07:48 +0100
Subject: instancemethod
In-Reply-To: <1169418918.963891.196080@m58g2000cwm.googlegroups.com>
References: <mailman.2961.1169417800.32031.python-list@python.org>
	<1169418918.963891.196080@m58g2000cwm.googlegroups.com>
Message-ID: <ef60af090701211507n4b1b0af2ia22294d92fe2bba2@mail.gmail.com>

On 21 Jan 2007 14:35:19 -0800, Nanjundi <nanjundi at gmail.com> wrote:
> >
> > if __name__ == '__main__':
> >     gert=Db('localhost','root','******','gert')
> >     gert.excecute('select * from person')
> >     for x in range(0,gert.rowcount):
> >         print gert.fetchone()
> >     gert.close()
> >
> > gert at gert:~$ python ./Desktop/svn/db/Py/db.py
> > Traceback (most recent call last):
> >   File "./Desktop/svn/db/Py/db.py", line 35, in <module>
> >     for x in range(0,gert.rowcount):
> > TypeError: range() integer end argument expected, got instancemethod.
> > gert at gert:~$
> >
> > Can anybody explain what i must do in order to get integer instead of
> > a instance ?
>
> Gert,
> >     for x in range(0,gert.rowcount):
> gert.rowcount is the method (and not a data attribute).
> gert.rowcount() is the method call, which get the return value from
> method.
>
> So try this.
> for x in range( 0,gert.rowcount() ):
>

Doh! :)

thx


From Thomas.Ploch at gmx.net  Sun Jan  7 11:40:50 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sun, 07 Jan 2007 17:40:50 +0100
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <P69oh.32493$Gr2.29258@newssvr21.news.prodigy.net>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>	<mailman.2332.1168016502.32031.python-list@python.org>	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>	<yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>	<mailman.2367.1168100759.32031.python-list@python.org>	<fK_nh.25689$QU1.17301@newssvr22.news.prodigy.net>	<w03oh.46$_k2.22@read3.inet.fi>
	<P69oh.32493$Gr2.29258@newssvr21.news.prodigy.net>
Message-ID: <45A12292.3060701@gmx.net>

W. Watson schrieb:
> As I understand it, there are two files I'm after: 1. python interpreter, 
> and 2. a python editor. It's #2 that I'm having trouble downloading. The 
> link is broken.

This is the python interpreter for windows:

http://www.python.org/ftp/python/2.5/python-2.5.msi


Here you can check for editors:

http://wiki.python.org/moin/PythonEditors


Here you will get the pywin32 package (also including the Win32 API, COM
support, and Pythonwin):

http://sourceforge.net/projects/pywin32/

I am not sure if you actually read any of our posts, because there is no
404 whatsoever. On none of the posted links in the whole thread.

Thomas


From cjw at sympatico.ca  Sun Jan 28 08:28:32 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 28 Jan 2007 08:28:32 -0500
Subject: IP address
In-Reply-To: <ephtph$fcl$1@minji.szn.dk>
References: <mailman.3244.1169978684.32031.python-list@python.org>
	<ephtph$fcl$1@minji.szn.dk>
Message-ID: <epi8e2$ti7$1@sea.gmane.org>

Klaus Alexander Seistrup wrote:
> Scripter47 wrote:
> 
>> How do i get my ip address?
>>
>> in cmd.exe i just type "ipconfig" then it prints:
>>       ...
>>       IP-address . . . . . . . . . . . . . . . . . : 192.168.1.10
>>       ...
>> how can i do that in python??
> 
> #v+
> 
> python -c 'import re, urllib; print re.findall("<title>Your IP: (.+?)</title>", urllib.urlopen("http://myip.dk/").read())[0]'
> 
> #v-
> 
> Cheers,
> 
Klaus,

Your one-liner doesn't work for me, with Windows XP, but the following 
does, within Python.

*** Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit 
(Intel)] on win32. ***
 >>> import re, urllib; print re.findall("<title>Your IP: 
(.+?)</title>", urllib.urlopen("http://myip.dk/").read())[0]
69.157.68.189
 >>>

Colin W.



From s_david_rose at hotmail.com  Thu Jan 25 20:52:40 2007
From: s_david_rose at hotmail.com (s. d. rose)
Date: Thu, 25 Jan 2007 20:52:40 -0500
Subject: Help extracting info from HTML source ..
Message-ID: <epbmt3$m6e$1@sea.gmane.org>

Hello All.
  I am learning Python, and have never worked with HTML.  However, I would 
like to write a simple script to audit my 100+ Netware servers via their web 
portal.

  I was reading Chapter 8 of Dive into Python, which deals with this topic. 
In the web portal of the server, there is a section similar to this:

  -->  clients and <A 
href="http://eugenia.blogsome.com/?s=ipkall">clever</a> services. <--

which I took from SlashDot, but what I'm talking about is using the word 
'services' to represent the link to eugenia.blogsome.com.

What I'd like to do is save the two pieces of info relative to the server 
name.  Probably in a dictionary, such as server1[link] to the page on 
eugenia.blogsome.com and server1[description] to 'services'.

I've used the example from Dive into Python to get the actual link in the 
source of the HTML, but I don't know how to get the text that is the 
hyperlink.

So in the portal, I've got a link 'Scheduled Server Reboot' going to say 
/ScheduledTasks/ID000000003/ on Server1, using similar to above clipped HTML 
source code.

Can someone please help me?  Sure, I could manually go to each server, but I 
wouldn't learn anything.  I've learned some, but also have real deadlines, 
so I eagerly hope for any assistance & instruction.

Thank you!
-Dave
Shelton, CT 





From justask at acme.com  Sun Jan 21 19:05:21 2007
From: justask at acme.com (Vincent Delporte)
Date: Mon, 22 Jan 2007 01:05:21 +0100
Subject: Code reformater?
References: <poe3r2ha92p6vrhtk9b2piso337djv4boo@4ax.com>
	<eotjsg$ff68$1@zam602.zam.kfa-juelich.de>
	<mailman.2956.1169347902.32031.python-list@python.org>
	<pan.2007.01.21.03.15.45.787139@REMOVE.THIS.cybersource.com.au>
Message-ID: <urv7r2d98j2mpfcdqgmnber1ntes39mnks@4ax.com>

On Sun, 21 Jan 2007 14:15:46 +1100, Steven D'Aprano
<steve at REMOVE.THIS.cybersource.com.au> wrote:
>Still, it is better not to lose the indentation in the first place.

Thanks for the tips. But it does happen when copy/pasting code from
either a web page or an e-mail that TABs are messed up, which is not a
problem with other languages, but is a problem with Python. Too bad.


From rubbishemail at web.de  Tue Jan 16 10:10:32 2007
From: rubbishemail at web.de (rubbishemail at web.de)
Date: 16 Jan 2007 07:10:32 -0800
Subject: arguments of a function/metaclass
Message-ID: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>

Hello,


I have a member function with many (20) named arguments

def __init__(self,a=1,b=2):
    self.a=a
    self.b=b

I would like to get rid of the many redundant lines like self.a=a and
set the members automatically.
The list of default arguments could be given like

def __init__(**kwargs):
    arglist={"a":1,"b":2]

if this makes things easier

Of course there has to be a check that raises an error in case of an
unknown argument not mentioned in this list.


I am sure there is an elegant way how to do this, could you give me any
hints???


Many thanks



Daniel



From pavlovevidence at gmail.com  Thu Jan  4 12:09:14 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 4 Jan 2007 09:09:14 -0800
Subject: Why is pow a builtin, anyways?
In-Reply-To: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
Message-ID: <1167930554.650336.208760@q40g2000cwq.googlegroups.com>

siggi wrote:
> Now the test for module math with function pow():
> ---------------------------------------------------
> >>> pow(9,9)
> 387420489
>
>  Fine, but sqrt() fails:
> -------------------
> >>> sqrt(9)
> I get this error message
>
> 'Traceback (most recent call last):
>   File "<pyshell#3>", line 1, in <module>
>     sqrt(9)
> NameError: name 'sqrt' is not defined'

The third argument to the builtin pow is a special usage for
cryptography, and something specific like that needs no representation
in the builtin namespace.  The ** operator covers all other uses.


Carl Banks



From gigs at hi.t-com.hr  Tue Jan  9 06:59:31 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Tue, 09 Jan 2007 12:59:31 +0100
Subject: Bitwise expression
In-Reply-To: <mailman.2472.1168332185.32031.python-list@python.org>
References: <enud98$960$1@ss408.t-com.hr>
	<mailman.2472.1168332185.32031.python-list@python.org>
Message-ID: <eo003g$blo$1@ss408.t-com.hr>

Hendrik van Rooyen wrote:
> "Gigs_" <gigs at hi.t-com.hr> wrote:
> 
> 
>> Can someone explain me bitwise expression?
>> few examples for every expression will be nice
>>
>> x << y Left shift
>> x >> y Right shift
>> x & y Bitwise AND
>> x | y Bitwise OR
>> x ^ y Bitwise XOR (exclusive OR)
>> ~x Bitwise negation
> 
> The short, and possibly weird, but true, answer is:
> 
> If you have to ask this question, you should avoid
> using these things. - Think of them as "Advanced Magic"
> 
> But this is unhelpful, so a slightly longer answer is:
> 
> Computer memory is like a long string of flip-flops that can
> take on one of two states - "on" or "True" represented normally by
> a digit 1, and "off" or "False" - a digit 0.   Hence the term binary.
> 
> Binary means "two valued", just like a Bicycle has two wheels.
> 
> These flip-flops are the smallest element of memory, and one
> of them is called a "bit".  The plural is "bits".  "plural" means
> "more than one of".
> 
> Eight bits are called a Byte.
> Half a Byte is a Nibble - four bits (sometimes spelt Nybble by
> people who are trying to be cute).
> There is a concept called a "Word" of memory which is ill defined.
> Sometimes it is one or two Bytes, sometimes three nibbles, sometimes
> four, eight or sixteen bytes - depends on the hardware's bus width.
> 
> No, I am not going to explain what a bus is.
> 
> You can think of a python number as a word of eight bytes long,
> and a python string as a number of bytes of arbitrary length.
> 
> I am also not going to explain big and little endian representation.
> Yahoo for it.
> 
> Now the logic operators, as applied to nibbles:
> 
> 1110  <<  0111               - shifted left, filled with zero from right
>                                         (multiply by two - seven to fourteen)
> 0010  >>  0100               - shifted right, filled with zero from left
>                                         (divide by two - four to two)
> 0100  =    0101 & 1110   - true if both bits true, false otherwise
>                                         (used for masking, clearing bits)
> 1101  =    0101  |  1100   - false if both bits false, true otherwise
>                                         (True if either bit true - used to set
> bits)
> 1001  =    0101  ^ 1100   - true if only one of the bits true, else false
>                                         (anything xored with itself is all zero)
>                                         (used to toggle bits, identity testing)
> 1001  ~    0110               - inversion "not"  - not true is false, not false
> is true
> 
> Also yahoo for "Boolean algebra" and "De Morgan" and "IEEE floating point
> representation"
> 
> hth - Hendrik
> 
> 

hey I know about bit, bits things, just didn't know how to use bitwise 
expression (didn't try it and didn't know what it means). so I just 
needed some examples.
Now is all clearer thanks to mensanator at aol.com and Hendrick van Rooyen


From cvanarsdall at mvista.com  Wed Jan 31 14:31:41 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 31 Jan 2007 11:31:41 -0800
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <1170271023.955808.314010@q2g2000cwa.googlegroups.com>
References: <1170260637.679856.39920@k78g2000cwa.googlegroups.com>
	<1170271023.955808.314010@q2g2000cwa.googlegroups.com>
Message-ID: <45C0EE9D.70301@mvista.com>

Michele Simionato wrote:
> On Jan 31, 5:23 pm, "Frank Potter" <could.... at gmail.com> wrote:
>   
>> I want to find a multithreaded downloading lib in python,
>> can someone recommend one for me, please?
>> Thanks~
>>     
>
> Why do you want to use threads for that? Twisted is the
> obvious solution for your problem, but you may use any
> asynchronous framework, as for instance the good ol
>   
Well, since it will be io based, why not use threads?  They are easy to 
use and it would do the job just fine.  Then leverage some other 
technology on top of that.

You could go as far as using wget via os.system() in a thread, if the 
app is simple enough. 

def getSite(site):
  os.system('wget %s',site)
 
threadList =[]
for site in websiteList:
   threadList.append(threading.Thread( target=getSite,args=(site,)))

for thread in threadList:
   thread.start()

for thread in threadList:
   thread.join()

> Tkinter:
>
> """
> Example of asynchronous programming with Tkinter. Download 10 times
> the same URL.
> """
>
> import sys, urllib, itertools, Tkinter
>
> URL = 'http://docs.python.org/dev/lib/module-urllib.html'
>
> class Downloader(object):
>     chunk = 1024
>
>     def __init__(self, urls, frame):
>         self.urls = urls
>         self.downloads = [self.download(i) for i in range(len(urls))]
>         self.tkvars = []
>         self.tklabels = []
>         for url in urls:
>             var = Tkinter.StringVar(frame)
>             lbl = Tkinter.Label(frame, textvar=var)
>             lbl.pack()
>             self.tkvars.append(var)
>             self.tklabels.append(lbl)
>         frame.pack()
>
>     def download(self, i):
>         src = urllib.urlopen(self.urls[i])
>         size = int(src.info()['Content-Length'])
>         for block in itertools.count():
>             chunk = src.read(self.chunk)
>             if not chunk: break
>             percent = block * self.chunk * 100/size
>             msg = '%s: downloaded %2d%% of %s K' % (
>                 self.urls[i], percent, size/1024)
>             self.tkvars[i].set(msg)
>             yield None
>         self.tkvars[i].set('Downloaded %s' % self.urls[i])
>
> if __name__ == '__main__':
>     root = Tkinter.Tk()
>     frame = Tkinter.Frame(root)
>     downloader = Downloader([URL] * 10, frame)
>     def next(cycle):
>         try:
>             cycle.next().next()
>         except StopIteration:
>             pass
>         root.after(50, next, cycle)
>     root.after(0, next, itertools.cycle(downloader.downloads))
>     root.mainloop()
>
>
>     Michele Simionato
>
>   


-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 12 19:22:47 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 13 Jan 2007 11:22:47 +1100
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<eo65qk$bsr$1@sea.gmane.org>
	<cb63d1e10701111420l28d0f0d0s35217370d86067b@mail.gmail.com>
	<mailman.2650.1168618607.32031.python-list@python.org>
	<eo8foc$7mh$1@gemini.csx.cam.ac.uk>
Message-ID: <pan.2007.01.13.00.22.45.142174@REMOVE.THIS.cybersource.com.au>

On Fri, 12 Jan 2007 17:15:56 +0000, Nick Maclaren wrote:

> In article <mailman.2650.1168618607.32031.python-list at python.org>,
> Facundo Batista <facundo at taniquetil.com.ar> writes:
> |> Noud Aldenhoven wrote:
> |> 
> |> > There are a (small) couple of other issues where rational numbers could be
> |> > handy. That's because rational numbers are exact, irrational numbers (in
> |> > python) aren't. But these issues are probably too mathematical to be used in
> |> 
> |> For the sake of me being less ignorant, could you please point me a
> |> language where irrational numbers are exact?
> 
> Some of the algebraic languages.  (2/3)^(1/5) is held as such and
> manipulated appropriately.
> 
> Yes, I know that's "cheating" :-)

I see your smiley, and I still don't understand. Why on earth would you
call it cheating for a language to have a data type that is suitable for
the data being used? Maybe it's a form of humour I don't get -- like
pointing at a car and saying "Look, a cow!".


-- 
Steven.



From letezo at fw.hu  Tue Jan 30 19:17:00 2007
From: letezo at fw.hu (=?ISO-8859-1?Q?L=E9tezo?=)
Date: Wed, 31 Jan 2007 01:17:00 +0100
Subject: Sorting a List of Lists
References: <1170201351.881776.257790@q2g2000cwa.googlegroups.com>
Message-ID: <006401c744cd$20703f00$8600a8c0@ANNA>

> events = [['Event URL as String', 'Event Title as String ', Event Date
> as Datetime], ...]
>
> I then thought I'd just go events.sort(lambda x,y: x[2]<y[2]) and call
> it a day. That didn't work. But then lamda functions like to be very
> simple, maybe object subscripts aren't allowed (even though I didn't
> get an error). So I wrote a comparison function that looks much as you
> would expect:

Comparision functions must return -1, 0 or 1, not a bool.
You may use a key function instead in this case (requires python 2.4 or 
newer):

events.sort(key=lambda x: x[2])

Viktor 



From bruno.desthuilliers at websiteburo.com  Tue Jan 23 03:26:00 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Tue, 23 Jan 2007 09:26:00 +0100
Subject: instancemethod
In-Reply-To: <mailman.3004.1169499317.32031.python-list@python.org>
References: <mailman.2961.1169417800.32031.python-list@python.org>	<45b51298$0$8289$426a74cc@news.free.fr>
	<mailman.3004.1169499317.32031.python-list@python.org>
Message-ID: <45b5c65e$0$23047$426a74cc@news.free.fr>

Gert Cuykens a ?crit :
> Reading all of the above this is the most simple i can come too.
> 
> import MySQLdb
> 
> class Db:
> 
>    def __init__(self,server,user,password,database):
>        self._db=MySQLdb.connect(server , user , password , database)
>        self._db.autocommit(True)
>        self.cursor=self._db.cursor()
> 
>    def excecute(self,cmd):

Just out of curiousity: is there any reason you spell it "excecute" 
instead of "execute" ?

>        self.cursor.execute(cmd)
>        self.rowcount=int(self.cursor.rowcount)
> 
>    def close(self):
>        self.cursor.close()
>        self._db.close()
> 
>    def __del__(self):
>        try:
>            self.close()
>        except:
>            pass



> if __name__ == '__main__':
>    gert=Db('localhost','root','******','gert')
>    gert.excecute('select * from person')
>    for row in gert.cursor:
>        print row
> 
> This must be the most simple it can get right ?

Using __getattr__ is still simpler.

> PS i didn't understand the __getattr__ quit well but i thought it was
> just to overload the privies class

The __getattr__ method is called when an attribute lookup fails (and 
remember that in Python, methods are -callable- attributes). It's 
commonly used for delegation.


From ljz at asfast.com  Sat Jan  6 16:53:23 2007
From: ljz at asfast.com (Lloyd Zusman)
Date: Sat, 06 Jan 2007 16:53:23 -0500
Subject: Recommended way to force a thread context switch?
References: <GzOnh.112$a81.91@nntpserver.swip.net>
	<1168103258.602286.146100@42g2000cwt.googlegroups.com>
	<1168104008.910681.46800@38g2000cwa.googlegroups.com>
	<mailman.2373.1168116439.32031.python-list@python.org>
	<Xns98B0D9B8ABB0Bduncanbooth@127.0.0.1>
Message-ID: <87odpblt4c.fsf@asfast.com>

Duncan Booth <duncan.booth at invalid.invalid> writes:

> Lloyd Zusman <ljz at asfast.com> wrote:
>
>> I have a python (2.5) program with number of worker threads, and I want
>> to make sure that each of these does a context switch at appropriate
>> times, to avoid starvation.  I know that I can do a time.sleep(0.001) to
>> force such a switch, but I'm wondering if this is the recommended
>> method.
>
> The recommended method is to start a new thread rather than following up on 
> an existing thread with an unrelated question.

I accidentally hit "a" in my mailer instead of "w" ("reply" instead of
"compose").  Geez.  It was an accident.  I'm sorry.


> Why do you think that just letting the threads run won't have the effect 
> you desire? Leave it to the system to schedule the threads.

I can already see that they don't have the effect I desire.  They are
long numerical calculations in tight loops.  I have to periodically put
explicit time.sleep(0.001) calls in place to force the context
switching, and I was wondering if that's the recommended method.


-- 
 Lloyd Zusman
 ljz at asfast.com
 God bless you.



From skip at pobox.com  Sat Jan  6 19:51:57 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 6 Jan 2007 18:51:57 -0600
Subject: Why less emphasis on private data?
In-Reply-To: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
Message-ID: <17824.17453.290049.177914@montanaro.dyndns.org>


    time> Coming from a C++ / C# background, the lack of emphasis on private
    time> data seems weird to me.

Python doesn't try to protect you from the authors of the code you use.  You
should be intelligent enough to use it wisely.  On the flip side, the lack
of truly private data and methods means the original author of a piece of
code doesn't need to anticipate all future uses to which the code will be
put.  Here are a couple items along the lines of "we're all adults here".

    http://spyced.blogspot.com/2005/06/anders-heljsberg-doesnt-grok-python.html
    http://www.mail-archive.com/tutor at python.org/msg17806.html

Skip


From deets at nospam.web.de  Fri Jan  5 08:15:00 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 05 Jan 2007 14:15:00 +0100
Subject: Encoding / decoding strings
References: <1167999295.242042.79470@s34g2000cwa.googlegroups.com>
Message-ID: <5071akF1ehiaqU1@mid.uni-berlin.de>

oliver at obeattie.com wrote:

> Hey Everyone,
> 
> Was just wondering if anyone here could help me. I want to encode (and
> subsequently decode) email addresses to use in URLs. I believe that
> this can be done using MD5.

Are you by chance after a way to create URLs that contain an email which the
server then can extract from them, and this to be tamperproof?

There are several ways to accomplish this - your MD5-suggestion is applyable
when working with a simple secret and by creating an additional parameter.

If you e.g. want an url like this to be secure

http://some.server/path?user_to_register=email at address

you use a secret, and hash the parameters together with the secret using
MD5. The result is then something like 

http://some.server/path?user_to_register=email at address&key=<md5sum>

Then in the server, you perform the same step as above, without the key of
course, and simply check if the MD5-sums are equal.


Anything else requires the use of a encryption algorithm like blowfish or
whatnot, either symetric or public key - I'm not an expert on that though.

Diez


From nagle at animats.com  Tue Jan 30 14:57:31 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 30 Jan 2007 19:57:31 GMT
Subject: Executing Javascript, then reading value
In-Reply-To: <1170105229.984079.219180@l53g2000cwa.googlegroups.com>
References: <1170103447.839304.44900@v33g2000cwv.googlegroups.com>
	<mailman.3277.1170104720.32031.python-list@python.org>
	<1170105229.984079.219180@l53g2000cwa.googlegroups.com>
Message-ID: <LqNvh.1382$zH1.806@newssvr29.news.prodigy.net>

Melih Onvural wrote:
> Thanks, let me check out this route, and then I'll post the results.
> 
> Melih Onvural
> 
> On Jan 29, 4:04 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> 
>> On 29 Jan 2007 12:44:07 -0800, Melih Onvural <melih.onvu... at gmail.com>
>> wrote:
>> 
>> 
>>> I need to execute some javascript and then read the value as part of a 
>>> program that I am writing. I am currently doing something like
>>> this:Python doesn't include a JavaScript runtime.  You might look into
>>> the
>> 
>> stand-alone Spidermonkey runtime.  However, it lacks the DOM APIs, so it
>> may not be able to run the JavaScript you are interested in running. There
>> are a couple other JavaScript runtimes available, at least.  If 
>> Spidermonkey is not suitable, you might look into one of them.

    This is getting to be a common problem.  One used to be able to
look at web pages from a program by reading the HTML.  Now you need to
load the page into a browser-like environment, run at least the
OnLoad JavaScript, and then start looking at the document object module.
This requires a browser emulator, a browser without a renderer.
Useful for spam filters and such.

     It's not clear if the original poster needs that much capability,
though.

				John Nagle


From deets at nospam.web.de  Fri Jan  5 03:42:19 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 05 Jan 2007 09:42:19 +0100
Subject: Problem installing MySQLdb/1.2.1_p2 with Python/2.4.1 and
	MySQL/5.0.18
In-Reply-To: <459e0752$0$17009$4c368faf@roadrunner.com>
References: <459e0752$0$17009$4c368faf@roadrunner.com>
Message-ID: <506hbbF1eqkd8U1@mid.uni-berlin.de>

Sean O'Donnell schrieb:
> Hi,
> 
> I can't seem to get MySQLdb/1.2.1p2 to install on Slackware/10.2, with
> Python/2.4.1, and MySQL/5.0.18.
> 
> The following command:
> 
> $ python setup.py build 2> setup.err
> 
> returns the following errors:
> 
> http://pastebin.com/851624
> 
> Any suggestions?

Install the mysql developer package that contains the needed includefiles.

Diez


From fredrik at pythonware.com  Fri Jan  5 04:57:12 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 05 Jan 2007 10:57:12 +0100
Subject: checking one's type
In-Reply-To: <E90C7F6E-5200-4553-9C39-8941999588B2@cs.hmc.edu>
References: <E90C7F6E-5200-4553-9C39-8941999588B2@cs.hmc.edu>
Message-ID: <enl7dn$eh4$1@sea.gmane.org>

belinda thom wrote:

> I've been using the following hack to determine if a type is  
> acceptable and I suspect there is a better way to do it:
> 
> e.g.
> 
> if type(s) == type("") :
>     print "okay, i'm happy you're a string"
> 
> If anyone knows a better way, I'm all ears.

     http://preview.tinyurl.com/yjnoc5

</F>



From martin at v.loewis.de  Wed Jan 10 01:50:15 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 10 Jan 2007 07:50:15 +0100
Subject: dynamic library loading, missing symbols
In-Reply-To: <1168388748.024090.119530@i39g2000hsf.googlegroups.com>
References: <1168388748.024090.119530@i39g2000hsf.googlegroups.com>
Message-ID: <45A48CA7.3080005@v.loewis.de>

dfj225 at gmail.com schrieb:
> However, the linker fails at runtime here because it can't
> find this symbol. The variable in question does exist in the C++ code
> that in does dlopen.

Did you verify, using nm -D, that the symbol is indeed present in
the shared object, not just in the source code?

> The reason for the complication is that I don't have control over how
> the library does dlopen() or how the code that calls dlopen was
> compiled.

What flags are given to that dlopen call?

> Is there a way to set at runtime what directories or libraries the
> linker should search for these symbols?

No. The dynamic linker doesn't search files to resolve symbols; instead,
it searches the process' memory. It first loads the referenced shared
libraries (processing the DT_NEEDED records in each one); that uses
the LD_LIBRARY_PATH. Then, symbol resolution needs to find everything
in the libraries that have already been loaded.

There are various ways to control which subset of in-memory symbols
the dynamic linker considers: the RTLD_GLOBAL/RTLD_LOCAL flags play
a role, the -Bsymbolic flag given to the static linker has an impact,
and so does the symbol visibility (hidden/internal/protected).

Regards,
Martin


From kbk at shore.net  Fri Jan 12 21:59:20 2007
From: kbk at shore.net (Kurt B. Kaiser)
Date: Fri, 12 Jan 2007 21:59:20 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200701130259.l0D2xK59005042@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  421 open ( +3) /  3530 closed ( +8) /  3951 total (+11)
Bugs    :  963 open ( +4) /  6426 closed (+21) /  7389 total (+25)
RFE     :  255 open ( +5) /   246 closed ( +1) /   501 total ( +6)

New / Reopened Patches
______________________

The Unicode "lazy strings" patches  (2007-01-06)
       http://python.org/sf/1629305  opened by  Larry Hastings

fast tuple[index] by inlining on BINARY_SUBSCR  (2007-01-07)
CLOSED http://python.org/sf/1629718  opened by  Hirokazu Yamamoto

Patch to add tempfile.SpooledTemporaryFile (for #415692)  (2007-01-07)
       http://python.org/sf/1630118  opened by  Dustin J. Mitchell

Implement named exception cleanup  (2007-01-07)
CLOSED http://python.org/sf/1630248  opened by  Collin Winter

Fix crash when replacing sys.stdout in sitecustomize  (2007-01-08)
       http://python.org/sf/1630975  opened by  Thomas Wouters

SyntaxWarning for backquotes  (2007-01-09)
       http://python.org/sf/1631035  opened by  Anthony Baxter

implement warnings module in C  (2007-01-08)
       http://python.org/sf/1631171  opened by  Neal Norwitz

sre module has misleading docs  (2007-01-09)
       http://python.org/sf/1631394  opened by  Tom Lynn

New exception syntax  (2007-01-09)
CLOSED http://python.org/sf/1631942  opened by  Collin Winter

from __future__ import print_function  (2007-01-12)
       http://python.org/sf/1633807  opened by  Anthony Baxter

Py3k: Fix pybench so it runs  (2007-01-13)
       http://python.org/sf/1634499  opened by  Larry Hastings

Patches Closed
______________

Win32: Add bytesobject.c to pythoncore.vcproj  (2007-01-04)
       http://python.org/sf/1628062  closed by  loewis

Win32: Fix build when you have TortoiseSVN but no .svn/*  (2007-01-04)
       http://python.org/sf/1628061  closed by  loewis

fast tuple[index] by inlining on BINARY_SUBSCR  (2007-01-07)
       http://python.org/sf/1629718  closed by  loewis

#1603424 subprocess.py wrongly claims 2.2 compatibility.  (2006-12-05)
       http://python.org/sf/1609282  closed by  astrand

Implement named exception cleanup  (2007-01-07)
       http://python.org/sf/1630248  closed by  collinwinter

(py3k) Remove the sets module  (2006-06-04)
       http://python.org/sf/1500611  closed by  gvanrossum

New exception syntax  (2007-01-09)
       http://python.org/sf/1631942  closed by  collinwinter

backticks will not be used at all  (2007-01-03)
       http://python.org/sf/1627052  closed by  gbrandl

New / Reopened Bugs
___________________

Python 2.5 64 bit compile fails on Solaris 10/gcc 4.1.1  (2007-01-05)
       http://python.org/sf/1628484  opened by  Bob Atkins

Pydoc sets choices for doc locations incorrectly  (2007-01-05)
       http://python.org/sf/1628895  opened by  Skip Montanaro

xml.dom.minidom parse bug  (2007-01-05)
CLOSED http://python.org/sf/1628902  opened by  Pierre Imbaud

clarify 80-char limit  (2007-01-05)
       http://python.org/sf/1628906  opened by  Jim Jewett

inspect trouble when source file changes  (2007-01-05)
       http://python.org/sf/1628987  opened by  phil

Incorrect type in PyDict_Next() example code  (2007-01-05)
       http://python.org/sf/1629125  opened by  Jason Evans

email._parseaddr AddrlistClass bug  (2007-01-06)
       http://python.org/sf/1629369  opened by  Tokio Kikuchi

array.array borks on deepcopy  (2006-08-24)
CLOSED http://python.org/sf/1545837  reopened by  nnorwitz

documentation of email.utils.parsedate is confusing  (2007-01-06)
       http://python.org/sf/1629566  opened by  Nicholas Riley

Backward incompatibility in logging.py   (2006-10-02)
CLOSED http://python.org/sf/1569622  reopened by  mklaas

doc error for re.sub  (2007-01-08)
CLOSED http://python.org/sf/1630511  opened by  Keith Briggs

doc misleading in re.compile  (2007-01-08)
       http://python.org/sf/1630515  opened by  Keith Briggs

Seg fault in readline call.  (2007-01-08)
       http://python.org/sf/1630794  opened by  gnovak

fnmatch.translate undocumented  (2007-01-08)
       http://python.org/sf/1630844  opened by  Gabriel Genellina

PyLong_AsLong doesn't check tp_as_number  (2007-01-08)
CLOSED http://python.org/sf/1630863  opened by  Roger Upole

Garbage output to file of specific size  (2007-01-08)
       http://python.org/sf/1630894  opened by  Michael Culbertson

email.Generators does not separates headers with "\r\n"  (2005-11-05)
       http://python.org/sf/1349106  reopened by  bwarsaw

Discrepancy between iterating empty and non-empty deques  (2007-01-09)
CLOSED http://python.org/sf/1631769  opened by  Christos Georgiou

logging.config.fileConfig doesn't clear logging._handlerList  (2007-01-10)
CLOSED http://python.org/sf/1632328  opened by  Stefan H. Holek

Hangs with 100% CPU load for certain regexes  (2007-01-11)
CLOSED http://python.org/sf/1633583  opened by  Matthias Klose

using locale does not display the intended behavior  (2007-01-11)
       http://python.org/sf/1633600  opened by  Matthias Klose

logging module / wrong bytecode?  (2007-01-12)
       http://python.org/sf/1633605  opened by  Matthias Klose

curses should reset curses.{COLS,LINES} when term. resized  (2007-01-12)
       http://python.org/sf/1633621  opened by  Matthias Klose

time.strftime() accepts format which time.strptime doesnt  (2007-01-12)
       http://python.org/sf/1633628  opened by  Matthias Klose

class derived from float evaporates under +=  (2007-01-12)
       http://python.org/sf/1633630  opened by  Matthias Klose

incomplete numerical comparisons  (2007-01-12)
       http://python.org/sf/1633648  opened by  Matthias Klose

file(file) should succeed  (2007-01-12)
CLOSED http://python.org/sf/1633665  opened by  Matthias Klose

mailbox.py _fromlinepattern regexp does not support positive  (2007-01-12)
       http://python.org/sf/1633678  opened by  Matthias Klose

AIX: configure ignores $CC; problems mit C++ comments  (2007-01-12)
       http://python.org/sf/1633863  opened by  Johannes Abt

for line in sys.stdin: doesn't notice EOF the first time   (2007-01-12)
       http://python.org/sf/1633941  opened by  Matthias Klose

re.compile("(.*$){1,4}", re.MULTILINE) fails  (2007-01-12)
       http://python.org/sf/1633953  opened by  Matthias Klose

configure problem for sem_init() on HP-UX  (2007-01-12)
CLOSED http://python.org/sf/1634033  opened by  Johannes Abt

AIX: wrong flags for ld when linking standard .so modules  (2007-01-12)
CLOSED http://python.org/sf/1634105  opened by  Johannes Abt

subprocess swallows empty arguments under win32  (2007-01-12)
       http://python.org/sf/1634343  opened by  Patrick M?zard

Bugs Closed
___________

documentation error for "startswith" string method  (2007-01-04)
       http://python.org/sf/1627956  closed by  akuchling

null bytes in docstrings  (2006-12-26)
       http://python.org/sf/1622533  closed by  akuchling

gzip.GzipFile is slow  (2003-11-25)
       http://python.org/sf/849046  closed by  akuchling

xml.dom.minidom parse bug  (2007-01-05)
       http://python.org/sf/1628902  closed by  loewis

frame->f_lasti not always correct  (2006-01-18)
       http://python.org/sf/1409443  closed by  rhettinger

Undocumented implicit strip() in split(None) string method  (2005-01-19)
       http://python.org/sf/1105286  closed by  rhettinger

split() description not fully accurate  (2005-12-14)
       http://python.org/sf/1380970  closed by  rhettinger

Underspecified behaviour of string methods split, rsplit  (2006-01-25)
       http://python.org/sf/1414673  closed by  rhettinger

32/64bit pickled Random incompatiblity  (2006-04-18)
       http://python.org/sf/1472695  closed by  rhettinger

array.array borks on deepcopy  (2006-08-24)
       http://python.org/sf/1545837  closed by  nnorwitz

subprocess.py (py2.5) wrongly claims py2.2 compatibility  (2006-11-27)
       http://python.org/sf/1603424  closed by  astrand

subprocess.Popen closes fds for sys.stdout or sys.stderr  (2006-11-28)
       http://python.org/sf/1604851  closed by  astrand

Backward incompatibility in logging.py   (2006-10-02)
       http://python.org/sf/1569622  closed by  vsajip

doc error for re.sub  (2007-01-08)
       http://python.org/sf/1630511  closed by  mwh

PyLong_AsLong doesn't check tp_as_number  (2007-01-08)
       http://python.org/sf/1630863  closed by  loewis

RotatingFileHandler cannot recover from failed doRollover()  (2007-01-04)
       http://python.org/sf/1627575  closed by  vsajip

Discrepancy between iterating empty and non-empty deques  (2007-01-09)
       http://python.org/sf/1631769  closed by  rhettinger

ctypes: Returning c_void_p from callback doesn\'t work  (2006-10-10)
       http://python.org/sf/1574593  closed by  theller

logging.config.fileConfig doesn't clear logging._handlerList  (2007-01-10)
       http://python.org/sf/1632328  closed by  vsajip

logging's fileConfig causes KeyError on shutdown  (2006-08-04)
       http://python.org/sf/1534765  closed by  vsajip

Hangs with 100% CPU load for certain regexes  (2007-01-11)
       http://python.org/sf/1633583  closed by  niemeyer

configure problem for sem_init() on HP-UX  (2007-01-12)
       http://python.org/sf/1634033  deleted by  jabt

AIX: wrong flags for ld when linking standard .so modules  (2007-01-12)
       http://python.org/sf/1634105  deleted by  jabt

New / Reopened RFE
__________________

Show "expected" token on syntax error  (2007-01-12)
       http://python.org/sf/1634034  opened by  Oliver Gramberg

RFE Closed
__________

file(file) should succeed  (2007-01-11)
       http://python.org/sf/1633665  closed by  akuchling



From nmm1 at cus.cam.ac.uk  Mon Jan  8 09:35:42 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 8 Jan 2007 14:35:42 GMT
Subject: Bizarre floating-point output
References: <enthjb$p0l$1@gemini.csx.cam.ac.uk> <entj5d$o4$1@south.jnrs.ja.net>
Message-ID: <entkru$2vs$1@gemini.csx.cam.ac.uk>


In article <entj5d$o4$1 at south.jnrs.ja.net>,
"Richard Brodie" <R.Brodie at rl.ac.uk> writes:
|> 
|> When you do print on a tuple it doesn't recursively
|> call str(), so you get the repr representations.

Ah!  That explains it.  I would call that reason intermediate
between rational and an artifact of the way the code has evolved!


Regards,
Nick Maclaren.


From dfj225 at gmail.com  Wed Jan 10 14:51:53 2007
From: dfj225 at gmail.com (dfj225 at gmail.com)
Date: 10 Jan 2007 11:51:53 -0800
Subject: dynamic library loading, missing symbols
In-Reply-To: <1168439928.436359.240390@i39g2000hsf.googlegroups.com>
References: <1168439928.436359.240390@i39g2000hsf.googlegroups.com>
Message-ID: <1168458713.270248.165830@i56g2000hsf.googlegroups.com>

So, I did some searching and using python -v to run my code, I was able
to see that my module was loaded by the python interpreter using
dlopen("lib", 2).

2 is the RTLD_NOW flag, meaning that RTLD_LOCAL is assumed by the
system.

I suppose this means that any subsequent libraries dlopened will not
see any of the symbols in my module?

I guess I'll have to look through the Python documentation to see if
they offer any work arounds to this problem.

~Doug

On Jan 10, 9:38 am, "dfj... at gmail.com" <dfj... at gmail.com> wrote:
> > Did you verify, using nm -D, that the symbol is indeed present in
> > the shared object, not just in the source code?Yes, the symbol is found in the shared object when using nm.
>
> > What flags are given to that dlopen call?dlopen(lib, RTLD_NOW | RTLD_GLOBAL);
>
> > No. The dynamic linker doesn't search files to resolve symbols; instead,
> > it searches the process' memory. It first loads the referenced shared
> > libraries (processing the DT_NEEDED records in each one); that uses
> > the LD_LIBRARY_PATH. Then, symbol resolution needs to find everything
> > in the libraries that have already been loaded.Ok, so if the linker is searching the process address space, then I
> suppose what really comes into play here is how the Python interpreter
> dynamically loaded my module, a module which is in turn calling code
> that does the dlopen above. If the Python interpreter is not loading
> my library as global, does that mean the linker will not find them
> when subsequent libraries are loaded?
>
> > There are various ways to control which subset of in-memory symbols
> > the dynamic linker considers: the RTLD_GLOBAL/RTLD_LOCAL flags play
> > a role, the -Bsymbolic flag given to the static linker has an impact,
> > and so does the symbol visibility (hidden/internal/protected).Ok, any other suggestions for things to try? Since all of the dlopen
> calls happen in 3rd party code, I won't really be able to modify them.
> I will try looking into more compile time flags for the linker and see
> what I can come up with. Keep in mind that this code works when it is
> all C++. Only when I add the Boost.Python wrapper to my code and then
> import in Python do I get this symbol error.
> 
> Thank you for your help,
> ~Doug



From larry.bates at websafe.com  Tue Jan  9 11:57:20 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 09 Jan 2007 10:57:20 -0600
Subject: mxODBC problems
In-Reply-To: <1168350572.375852.212740@i15g2000cwa.googlegroups.com>
References: <1168350572.375852.212740@i15g2000cwa.googlegroups.com>
Message-ID: <-vqdnaETVsDwVD7YnZ2dnUVZ_ubinZ2d@comcast.com>

Sean Davis wrote:
> I have just installed mxODBC on my x86_64 suse linux machine, where I
> use unixODBC for connection.  Running queries from isql or DataManager
> works fine for the DSN that I am using.  However, under mxODBC, I can
> get a connection object and a cursor object, but all attempts to
> execute even the simplest selects result in empty resultsets.  Any
> ideas on what might be wrong?
> 
>>>> from mx.ODBC.unixODBC import *
>>>> con = connect('Postgresql',user='username',password='passwd')
>>>> cur = con.cursor()
>>>> cur.execute('SELECT * FROM g_rif')
>>>> rs = cur.execute('SELECT * FROM g_rif')
>>>> rs
>>>> cur.execute('SELECT * FROM g_rif').fetchall()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> AttributeError: 'NoneType' object has no attribute 'fetchall'
> 
> Thanks,
> Sean
> 
I think you will find that there result returned by the
cur.execute is None upon success.  You probably meant:

cur.execute('SELECT * FROM g_rif')
table=cur.fetchall()

Then process table.

-Larry


From cliff at develix.com  Wed Jan 31 18:14:10 2007
From: cliff at develix.com (Cliff Wells)
Date: Wed, 31 Jan 2007 15:14:10 -0800
Subject: How to sort using hash's key?
In-Reply-To: <1170276870.45c102069d9e6@webmail.3web.com>
References: <1170276870.45c102069d9e6@webmail.3web.com>
Message-ID: <1170285250.3675.3.camel@portable-evil>

On Thu, 2007-02-01 at 04:54 +0800, JoJo wrote:

> I want to sort a dict via its key,but I have no idea on how to do it.
> Please help me,thanks.

You can't.  There is, however, a recipe for an "ordered dict" on ASPN:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/438823


> 3webXS HiSpeed Dial-up...surf up to 5x faster than regular dial-up alone... 
> just $14.90/mo...visit www.get3web.com for details

You pay $15/mo for dialup???

Regards,
Cliff



From S.Mientki-nospam at mailbox.kun.nl  Sat Jan 13 06:06:55 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sat, 13 Jan 2007 12:06:55 +0100
Subject: Portable Python - free portable development environment !
In-Reply-To: <1168684571.205607.277920@s34g2000cwa.googlegroups.com>
References: <1168533423.224355.221390@k58g2000hse.googlegroups.com>
	<mailman.2598.1168551029.32031.python-list@python.org>
	<1168639781.763133.319580@s34g2000cwa.googlegroups.com>
	<mailman.2676.1168641529.32031.python-list@python.org>
	<1168684571.205607.277920@s34g2000cwa.googlegroups.com>
Message-ID: <9a6bb$45a8bd39$d443bb3a$8938@news.speedlinq.nl>

> and something like Enthought edition will be there :) with even more
> packages and options :) at least that is my goal for the future :) But
> I must say I will also always be carefull with size of the distro :)
> thats also important right? :)
Coming from MatLab, that's not the most important thing ;-)
> 
> more ideas?
Embedded use of Python (e.g. Python4Delphi)...
... I can imagine it needs special requirements ?

cheers,
Stef


From albert.wellens at gmail.com  Tue Jan 16 17:17:51 2007
From: albert.wellens at gmail.com (awel)
Date: 16 Jan 2007 14:17:51 -0800
Subject: Check a windows service
In-Reply-To: <1168967374.568967.173690@11g2000cwr.googlegroups.com>
References: <1168966952.965088.17740@l53g2000cwa.googlegroups.com>
	<1168967374.568967.173690@11g2000cwr.googlegroups.com>
Message-ID: <1168985869.099273.13630@38g2000cwa.googlegroups.com>

Sorry, but could you give me an example with a real service 'cause I've
tried this script but nothings happened, no error, nothings ; even if I
launch it in cmd prompt.

Thanks

Tim Golden a ?crit :
> awel wrote:
>
> > I'm new in python and I would like to know if it's possible to check if
> > a specific windows service is present and if it's possible how can I
> > do?
>
> This is one way:
>
> http://tgolden.sc.sabren.com/python/wmi_cookbook.html#automatic_services
>
> You'd have to change that example slightly, but I
> hope the principal is clear enough. If not, ask again.
> 
> TJG



From horpner at yahoo.com  Wed Jan 24 15:55:17 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 24 Jan 2007 20:55:17 GMT
Subject: Re-thinking my if-thens - a software engineering question
References: <1169668287.517657.24450@l53g2000cwa.googlegroups.com>
Message-ID: <VIPth.1712$G23.1049@newsreading01.news.tds.net>

On 2007-01-24, metaperl <metaperl at gmail.com> wrote:
>             if dict_key == 'PCN':
> 		fields = dict_val.split("/")
>                 mo = re.match( '(\w{2})(\d{2})(\d{2})' , fields[1] )
> 		if mo:
> 		    dict_val = "%s/%s%s/%s" % (fields[0], mo.group(1), mo.group(3),
> fields[2][1:])
> 		else:
> 		    dict_val = dict_val
>
> Ok, so now here is what has happened. This code was based on
> the assumption that dict_val would have 2 forward slashes in
> it. It turns out that I need to follow a different process of
> massaging when no slashes are present. A naive solution would
> be something like:
>
> if dict_key == 'PCN':
>                     fields = dict_val.split("/")
>                     if fields == 3:
>                         dict_val = pcn_three(fields) # where pcn_three
> is the code above
>                 else:
>                     # new logic
>
> But I am wondering if I should abstract the flow of control
> into a class or something.

This is what I do in Python when a new requirement pops up:

 1. Write the simplest/first thing that comes to mind to fix it.
 1. a) Am I done? Probably. But maybe not.
 2. Now I examine what I've written to see the lay of the code.
    Only after writing something new once do I usually have
    enough information to write it better. In other words,
    writing the code organizes my thoughts. I usually have to
    fully understand something, even to get a kludgey solution to
    work. The Kludgey solution informs the design of something
    better.
 2. a) Got to 1. a)

In the case above, I've tried to figure out what you're
specifically doing, and failed. So I don't have more specific
advice.

-- 
Neil Cerutti


From no-spam at no-spam-no-spam.invalid  Tue Jan 16 06:34:30 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Tue, 16 Jan 2007 12:34:30 +0100
Subject: How to convert float to sortable integer in Python
In-Reply-To: <1168939312.223194.184770@l53g2000cwa.googlegroups.com>
References: <1168939312.223194.184770@l53g2000cwa.googlegroups.com>
Message-ID: <eoid8h$bnn$1@news.albasani.net>

shellon wrote:
> Hi all:
>     I want to convert the float number to sortable integer, like the
> function float2rawInt() in java, but I don't know the internal
> expression of float, appreciate your help!
> 

float comparision works well enough for sorting in Python. What is 
the actual requirement?

see also hash() and id() for keying.

Robert


From gonzlobo at gmail.com  Sun Jan  7 16:03:07 2007
From: gonzlobo at gmail.com (gonzlobo)
Date: Sun, 7 Jan 2007 14:03:07 -0700
Subject: Python cheatsheets
Message-ID: <be5994b50701071303i67c42ed1p92fa4421916b490c@mail.gmail.com>

Curious if anyone has a python cheatsheet* published? I'm looking for
something  that summarizes all commands/functions/attributes. Having
these printed on a 8" x 11" double-sided laminated paper is pretty
cool.

* cheatsheet probably isn't the right word, but you get the idea. :)


From jdvolz at gmail.com  Mon Jan  8 16:39:12 2007
From: jdvolz at gmail.com (jdvolz at gmail.com)
Date: 8 Jan 2007 13:39:12 -0800
Subject: Network failure when using urllib2
Message-ID: <1168292352.349983.139260@i15g2000cwa.googlegroups.com>

I have a script that uses urllib2 to repeatedly lookup web pages (in a
spider sort of way).  It appears to function normally, but if it runs
too long I start to get 404 responses.  If I try to use the internet
through any other programs (Outlook, FireFox, etc.) it will also fail.
If I stop the script, the internet returns.

Has anyone observed this behavior before?  I am relatively new to
Python and would appreciate any suggestions. 

Shuad



From sturlamolden at yahoo.no  Wed Jan 17 17:53:02 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 17 Jan 2007 14:53:02 -0800
Subject: How can I create a linked list in Python?
In-Reply-To: <45ae8950$0$31033$426a74cc@news.free.fr>
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<eojb9v$92rq$1@netnews.upenn.edu>
	<45ad5104$0$393$426a74cc@news.free.fr>
	<1169009882.408482.43360@q2g2000cwa.googlegroups.com>
	<45ae8950$0$31033$426a74cc@news.free.fr>
Message-ID: <1169074382.702857.313010@11g2000cwr.googlegroups.com>


Bruno Desthuilliers wrote:

> Have you considered using tuples ? If you go the FP way, why not use an
> immutable type ?

Well, good question. Tuples are immutable, which means they are
immutable. So you cannot use a cursor to change an element inside the
list. So instead of changing the original items, you just replace the
cursor with a new reference. But it it is read only, sure, use tuples.


> But how are Lisp lists implemented then ?-)

They are defunct binary trees, some think they are not really lists at
all :-)

Actually, nesting tuples or lists doesn't really duplicate Lisp cons,
as one can only create a stack-like object with the nesting. Python
really need a cons type like Lisp. I think it is time to write one, in
a plain C extension.



From scott.daniels at acm.org  Tue Jan 16 13:39:38 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Tue, 16 Jan 2007 10:39:38 -0800
Subject: A note on heapq module
In-Reply-To: <45ad0f6c$1@nntp0.pdx.net>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<45ad0f6c$1@nntp0.pdx.net>
Message-ID: <45ad110c$1@nntp0.pdx.net>

Scott David Daniels wrote:

Sorry, I blew the __ne__:

>>     def __ne__(self, other):
>>         return not isinstance(other, Heap) or self.h != other.h
>           return not isinstance(other, self.__class__) and sorted(
>                                      self.h) != sorted(other.h)
Should be:
           return not isinstance(other, self.__class__) or sorted(
                                         self.h) != sorted(other.h)

--Scott David Daniels
scott.daniels at acm.org


From goodidea1950 at hotmail.spam.com  Sat Jan 27 20:12:40 2007
From: goodidea1950 at hotmail.spam.com (AKA gray asphalt)
Date: Sat, 27 Jan 2007 17:12:40 -0800
Subject: Do I need Python to run Blender correctly?
References: <tRZth.2027$pH3.140@newsfe12.phx>
	<5%4uh.75582$wP1.6882@newssvr14.news.prodigy.net>
Message-ID: <LNSuh.9854$Kv1.5191@newsfe11.phx>


"John Nagle" <nagle at animats.com> wrote in message 
news:5%4uh.75582$wP1.6882 at newssvr14.news.prodigy.net...
> AKA gray asphalt wrote:
>> I downloaded Blender but there was no link for python. Am I on the right 
>> track?
>
>    Blender doesn't require Python, but if you have Python, you can
> write plug-ins for Blender.   Get "The Blender Book"; otherwise
> you'll never figure Blender out.
>
> John Nagle

Will do. Thanks.




From dotancohen at gmail.com  Tue Jan  2 15:25:12 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Tue, 2 Jan 2007 22:25:12 +0200
Subject: Unsubscribing from the list
In-Reply-To: <ene064$bm5$1@sea.gmane.org>
References: <880dece00701020605s59e45a70je871ecd89ec7f487@mail.gmail.com>
	<ene064$bm5$1@sea.gmane.org>
Message-ID: <880dece00701021225y785be5fbn42971e1ddd30dad9@mail.gmail.com>

On 02/01/07, Robert Kern <robert.kern at gmail.com> wrote:
> Dotan Cohen wrote:
> > I need to unsubscribe from this list. I've mailed
> > users-unsubscribe at python.org but that did not unsubscribe me. I've
> > also gone to the list homepage and entered my user information, but
> > that just sent me a message that someone had tried to resubscribe this
> > username. What must one do to unsubscribe from python-list?
>
> Go here:
>
>   http://mail.python.org/mailman/listinfo/python-list
>
> Go to the bottom of the page. Next to the button "Unsubscribe or edit options",
> enter your email address. Click the button. On the next page, click
> "Unsubscribe". Follow the instructions in the email that is sent to you.
>

Thanks. I read that page, got as far as this:
(The subscribers list is only available to the list administrator.)
and decided that there was no futher interest on the page for me. Thanks.

Dotan Cohen

http://what-is-what.com/what_is/xss.html
http://lyricslist.com/lyrics/artist_albums/95/bush.html


From skip at pobox.com  Tue Jan 16 08:44:29 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 16 Jan 2007 07:44:29 -0600
Subject: Globbing files by their creation date
In-Reply-To: <1168954453.954486.188680@m58g2000cwm.googlegroups.com>
References: <1168954453.954486.188680@m58g2000cwm.googlegroups.com>
Message-ID: <17836.54973.859482.949455@montanaro.dyndns.org>


    Thomas> I've used glob.glob to create a list of all files whose name
    Thomas> matches a substring, but I don't see how I can use it to
    Thomas> identify files by their creation date.

Sumthin' like:

    files = [f for f in glob.glob(globpat)
                   if os.path.getctime(f) > timethreshold]

Define globpat and timethreshold accordingly.  You sure you don't mean
modification time?  If so, change getctime to getmtime.

Skip


From S.Mientki-nospam at mailbox.kun.nl  Mon Jan 22 17:37:41 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Mon, 22 Jan 2007 23:37:41 +0100
Subject: Python Windows Editors
In-Reply-To: <ep3bq3$k4e$1@atlantis.news.tpi.pl>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<ep33ul$6cr$1@atlantis.news.tpi.pl>
	<ea71a$45b5141c$d443bb3a$3908@news.speedlinq.nl>
	<ep3bq3$k4e$1@atlantis.news.tpi.pl>
Message-ID: <9b1f4$45b53ca7$d443bb3a$28591@news.speedlinq.nl>

Jarek Zgoda wrote:
> Stef Mientki napisa?(a):
> 
>>  Any text editor is only as good as the
>>> programmer who uses it. ;)
>>>
>> Yes but an IDE is different ;-)
> 
> Would it make me better Fortran programmer? ;)
> 
I can't judge for you, ...
... maybe you are already at the top ;-)
I can only speak for myself ...
... for beginners an IDE is certainly much much more than an editor.

cheers,
Stef Mientki


From deets at nospam.web.de  Sat Jan 20 14:19:37 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 20 Jan 2007 20:19:37 +0100
Subject: confused on python rpc with apache, is it possible?
In-Reply-To: <mailman.2949.1169320005.32031.python-list@python.org>
References: <mailman.2912.1169227938.32031.python-list@python.org>	<51ce8uF1k0tl5U1@mid.uni-berlin.de>	<mailman.2931.1169273350.32031.python-list@python.org>	<1169276359.477277.17930@q2g2000cwa.googlegroups.com>	<mailman.2945.1169309537.32031.python-list@python.org>	<51etfpF1kappuU1@mid.uni-berlin.de>
	<mailman.2949.1169320005.32031.python-list@python.org>
Message-ID: <51f8aoF1ju2i6U1@mid.uni-berlin.de>

> 
> well in that case I don't need apache.
> can I do xml-rpc using the default libraries that come with every
> python installer?

Yes, and a simple look in the API docs would have convinced you of that. 
I suggest you start googling and reading.

> is there some added advantage of using twisted?

Certainly, but it comes with added burden of using and understanding a 
complex framework. Here also applies: read the docs.

Diez


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Jan 15 16:43:57 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 15 Jan 2007 22:43:57 +0100
Subject: Watch log
References: <1168892415.324184.273210@l53g2000cwa.googlegroups.com>
Message-ID: <512astF1i9fgbU1@mid.individual.net>

Salvatore Di Fazio wrote:

> I would like wait until a new line will be write in the file.
> 
> Something like the "watch cat Log" command on Linux os.

Why not read the file continuously and only do something if a new
line is complete (i. e.  a newline char is detected)?

> How can I check the eof and restart the reading?

Why do you want to check for an EOF character?

Regards,


Bj?rn

-- 
BOFH excuse #212:

Of course it doesn't work. We've performed a software upgrade.



From NutJob at gmx.net  Thu Jan 25 09:38:28 2007
From: NutJob at gmx.net (antred)
Date: 25 Jan 2007 06:38:28 -0800
Subject: Please have a look at this class
Message-ID: <1169735908.009109.7460@a75g2000cwd.googlegroups.com>

Hello everyone,

While working on a program I encountered a situation where I'd
construct a largish data structure (a tree) from parsing a host of
files and would end up having to throw away parts of my newly built
tree if a file turned out to contain invalid data. My first thought was
'Well, you can always make a deep copy of your tree first, then add new
data to the copy and revert to the original if you need to.", but as
this tree can grow very big this is not exactly efficient.
So my second idea was to come up with a class that offers a very
limited degree of database-like behavior, meaning you can make changes
to the object and then decide whether you want to commit those changes
or roll them back to get back to the original. For example:

<CODE SNIPPET>

u = Unrollable()
u.someValue = 3.14
u.aString = 'Hi there'

# If we decide we want to keep those changes ...
u.commit()

# Or we could have reverted to the original. This would have restored
the state prior to the last call to commit() (or simply the state at
the beginning, if there hasn't been a call to commit yet).
#u.rollback()

</CODE SNIPPET>

The basic idea behind this is that each instance of the Unrollable
class keeps an internal dictionary (which, in lieu of a better name I'm
currently calling 'sand box') to which all changed attribute values are
saved (attribute changes are intercepted via __setattr__). Then, with a
call to commit(), all attributes are transferred to the instance's
__dict__ dictionary and hence become actual attributes per se.

Similarily, the rollback() function simply empties the contents of the
sand box without committing them to __dict__. The rollback() function
can work recursively, too, if passed some extra parameters. If so, it
walks either the sand box or the __dict__ (or both) and invokes the
rollback() function on any attribute members that are instances of the
Unrollable class or a derived class.

Finally, this works for 'private' attributes (i.e. names with two
leading underscores), too, as the __setattr__ implementation mangles
the name of the attribute if it detects a private name.

I'm posting this for 2 reasons. Firstly, I feel that I have finally
produced something that others _might_ find useful, too. Secondly,
since I'm still learning Python (yeah, even after 2 years), I would be
very grateful to hear people's criticisms. Are there things that could
be done more efficiently? Do you spot any grave errors? Does something
similar already exist that I should just have used instead? Right now
I'm rather pleased with my class, but if someone tells me there is
already something like this Python's library (and then it'll most
likely be more efficient anyway) then I'd of course rather use that.

Entire class definition + some test code attached to this post.

P.S. I __LOVE__ how something like this is just barely 70 lines of code
in Python!



class Unrollable( object ):
	"""Provides a very simple commit/rollback system."""

	def __setattr__( self, attributeName, attributeValue ):
		"""Changes the specified attribute by setting it to the passed value.
The change is only made to the sandbox and is not committed."""

		if attributeName.find( '__' ) == 0:
			# Mangle name to make attribute private.
			attributeName = '_' + self.__class__.__name__ + attributeName

		try:
			theDict = self.__dict__[ '_Unrollable__dSandBox' ]
		except KeyError:
			theDict = self.__dict__[ '_Unrollable__dSandBox' ] = {}


		theDict[ attributeName ] = attributeValue


	def __getattr__( self, attributeName ):
		"""This method ensures an attribute can be accessed even when it
hasn't been committed yet (since it might not exist in the object
		itself yet)."""

		if attributeName.find( '__' ) == 0:
			# Mangle name to make attribute private.
			attributeName = '_' + self.__class__.__name__ + attributeName

		try:
			theDict = self.__dict__[ '_Unrollable__dSandBox' ]
		except KeyError:
			# Our sandbox doesn't exist yet, therefore the requested attribute
doesn't exist yet either.
			raise AttributeError


		try:
			return theDict[ attributeName ]
		except KeyError:
			# No such attribute in our sandbox.
			raise AttributeError

	def commitChanges( self ):
		"""Commits the contents of the sandbox to the actual object. Clears
the sandbox."""
		while len( self.__dSandBox ) > 0:
			key, value = self.__dSandBox.popitem()
			self.__dict__[ key ] = value

	def unroll( self, bRecurseSandBox = True, bRecurseDict = False ):
		"""Ditches all changes currently in the sandbox. Recurses all objects
in the instance itself and in its sandbox and, if
		they're unrollable instances themselves, invokes the unroll method on
them as well."""
		if bRecurseSandBox:
			while len( self.__dSandBox ) > 0:
				key, value = self.__dSandBox.popitem()

				if isinstance( value, Unrollable ):
					value.unroll( bRecurseSandBox, bRecurseDict )
		else:
			self.__dSandBox.clear()

		if bRecurseDict:
			iterator = self.__dict__.itervalues()

			while True:
				try:
					nextVal = iterator.next()
				except StopIteration:
					break

				if isinstance( nextVal, Unrollable ):
					nextVal.unroll( bRecurseSandBox, bRecurseDict )

	def hasUncommittedChanges( self ):
		"""Returns true if there are uncommitted changes, false otherwise."""
		return len( self.__dSandBox ) > 0




if __name__ == '__main__':
	# With a public attribute ...
	u = Unrollable()

	print 'Before.'

	try:
		theValue = u.theValue
	except AttributeError:
		print 'u does not have a theValue attribute yet.'
	else:
		print 'u.theValue is', theValue


	u.theValue = 3.147634

	print 'After set().'

	try:
		theValue = u.theValue
	except AttributeError:
		print 'u does not have a theValue attribute yet.'
	else:
		print 'u.theValue is', theValue

	u.commitChanges()

	print 'After commitChanges().'

	try:
		theValue = u.theValue
	except AttributeError:
		print 'u does not have a theValue attribute yet.'
	else:
		print 'u.theValue is', theValue

	print u.__dict__


	# With a private attribute ...
	class MyClass( Unrollable ):
		def accessPrivateAttr( self ):
			try:
				theValue = self.__theValue
			except AttributeError:
				print 'self does not have a __theValue attribute yet.'
			else:
				print 'self.__theValue is', theValue


	anObject = MyClass()

	print 'Before.'
	anObject.accessPrivateAttr()

	anObject.__theValue = 6.667e-11
	print 'After set().'
	anObject.accessPrivateAttr()

	#anObject.commitChanges()

	print 'After commitChanges().'
	anObject.accessPrivateAttr()




	anObject.subObject = Unrollable()
	anObject.subObject.aString = 'Yeeehaawww'

	print anObject.__dict__
	print anObject.subObject.__dict__
	
	anObject.unroll( True, True )
	
	print anObject.__dict__



From kavithapython at yahoo.co.in  Thu Jan 25 04:55:15 2007
From: kavithapython at yahoo.co.in (kavitha thankaian)
Date: Thu, 25 Jan 2007 09:55:15 +0000 (GMT)
Subject: newbie question:connecting to a database
In-Reply-To: <45B490D0.8020809@portaone.com>
Message-ID: <111669.72456.qm@web7812.mail.in.yahoo.com>

Hi,
   
  I could solve the problem in connecting to a database,,,
  while configuring the daatsourcename by default it gets connected to the master table,,,so there i must specify the database which i like to connect,,,so now i can see the animals table in my database,,
   
  Thanks Eugene,,,
   
  Kavitha

Eugene Antimirov <Eugene.Antimirov at portaone.com> wrote:
  kavitha thankaian wrote:
> Hi,
> 
> i wrote a simple script (which follows) to insert a table in the 
> database.i could execute this query and get the result in python 
> shell.but when i open "my sql enterprise manager" i couldnt find the 
> table"animals".it would be so kind of you if someone could help me,,,
> 
> 
> import dbi
> import odbc
> conn=odbc.odbc("DSN=mydatabase;UID=xxx;PWD=yyy")
> cursor=conn.cursor()
> cursor.execute("Create table animals(parent char(50),child char(50))")
> cursor.execute("insert into animals values('lion','cub')")
> cursor.execute("insert into animals values('goat','lamb')")
> cursor.execute("select * from animals")
> print cursor.fetchall()
> 
> 
> Rgds
> Kavitha
>
> ------------------------------------------------------------------------
You've probably missed cursor.commit() ;)

-- 
Sincerely,
Eugene Antimirov
PortaOne, Inc., SIP Support Engineer
support at portaone.com

* For further Billing and Technical information:
=> Please visit our website http://www.portaone.com
=> Please visit our forum http://forum.portaone.com

* Meet us at Internet Telephony Conference & Expo
* Ft. Lauderdale, FL - January 24-26, 2007 - Booth 1322
* http://www.tmcnet.com/voip/conference/

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


 				
---------------------------------
 Here?s a new way to find what you're looking for - Yahoo! Answers 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070125/b3011638/attachment.html>

From anton.hartl at gmail.com  Mon Jan 15 14:34:46 2007
From: anton.hartl at gmail.com (Anton Hartl)
Date: Mon, 15 Jan 2007 19:34:46 +0000 (UTC)
Subject: Segfault with tktreectrl on python-2.5 on linux
References: <1168884154.116074.308720@s34g2000cwa.googlegroups.com>
Message-ID: <slrneqnlqh.1hks.ah@hugin-home1.muc.de>

Hi,

On 2007-01-15, klappnase <klappnase at web.de> wrote:

> Some people sent me mail describing the same problem, so I think it is
> not a problem with my installation of python-2.5. The treectrl widget
> itself works well when running from Tcl or from python2.4, so i suspect
> that it is a bug in python-2.5.
> Below the output from gdb when running the dirtree demo from the
> TkinterTreectrl package:
>
> (gdb) run
> Starting program: /usr/local/bin/python2.5
> /home/pingu/projekte/TkinterTreectrl/TkinterTreectrl-0.6/demo/dirtree.py
> [Thread debugging using libthread_db enabled]
> [New Thread -1209842944 (LWP 21831)]
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread -1209842944 (LWP 21831)]
> block_alloc (b=0x1, size=16) at Python/pyarena.c:109
> 109             if (b->ab_offset + size > b->ab_size) {
> (gdb) bt
> #0  block_alloc (b=0x1, size=16) at Python/pyarena.c:109
> #1  0x080d829e in PyArena_Malloc (arena=0x82b2790, size=16) at
> Python/pyarena.c:192
> #2  0x081129ca in Ellipsis (arena=0x10) at Python/Python-ast.c:1764
> #3  0xb77731ef in DisplayProcText () from
> /usr/lib/treectrl2.2/libtreectrl2.2.so
>
> Any ideas?

Yes. And a solution as well :)

Here is the story:

    - libpython2.5.so contains a global symbol "Ellipsis"; this is
      new in 2.5 and came in with the new AST/compiler code

    - starting python2.5 loads libpython2.5.so (obviously)

    - now you do something like:
	
	tk.call("package", "require", "tktreectrl")

	this loads libtktreectrl2.2.so

    - libtktreectrl2.2.so contains a global symbol "Ellipsis"

    - and now disaster happens: references in libtktreectrl2.2.so
      to "Ellipsis" are NOT resolved to the "Ellipsis" symbol
      in libtktreectrl2.2.so but rather to the "Ellipsis" symbol
      in libpython2.5.so

    - this is not what you want, but is correct behaviour of
      symbol resolution in shared shared libraries (and is
      equivalant to the behaviour with static libs btw)

Solutions:

    a) convince Python developers to prefix ALL new (wrt. 2.5)
       global symbols with a prefix like "_PyAST_" or equivalent;
       this would be consistent with how it is done anyway,
       unfortunately the new AST symbols deviate from this practise
       (there are symbols like "Assert", "If", "Then", ...)

 or b) apply an equivalent rule to the global symbols in
       tktreectrl that are global by accident, i.e. because
       of the way the library is structured and built

Best Regards,
    Anton



From cvanarsdall at mvista.com  Thu Jan 25 14:12:24 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Thu, 25 Jan 2007 11:12:24 -0800
Subject: The reliability of python threads
In-Reply-To: <ep8gue$3tu$1@panix3.panix.com>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep8gue$3tu$1@panix3.panix.com>
Message-ID: <45B90118.5010408@mvista.com>

Aahz wrote:
> [snip]
>
> My response is that you're asking the wrong questions here.  Our database
> server locked up hard Sunday morning, and we still have no idea why (the
> machine itself, not just the database app).  I think it's more important
> to focus on whether you have done all that is reasonable to make your
> application reliable -- and then put your efforts into making your app
> recoverable.
>   
Well, I assume that I have done all I can to make it reliable.  This 
list is usually my last resort, or a place where I come hoping to find 
ideas that aren't coming to me naturally.  The only other thing I 
thought to come up with was that there might be network errors.  But 
i've gone back and forth on that, because TCP should handle that for me 
and I shouldn't have to deal with it directly in pyro, although I've 
added (and continue to add) checks in places that appear appropriate 
(and in some cases, checks because I prefer to be paranoid about errors).


> I'm particularly making this comment in the context of your later point
> about the bug showing up only every three or four months.
>
> Side note: without knowing what error messages you're getting, there's
> not much anybody can say about your programs or the reliability of
> threads for your application.
>   
Right, I wasn't coming here to get someone to debug my app, I'm just 
looking for ideas.  I constantly am trying to find new ways to improve 
my software and new ways to reduce bugs, and when i get really stuck, 
new ways to track bugs down.  The exception won't mean much, but I can 
say that the error appears to me as bad data.  I do checks prior to 
performing actions on any data, if the data doesn't look like what it 
should look like, then the system flags an exception.

The problem I'm having is determining how the data went bad.  In 
tracking down the problem a couple guys mentioned that problems like 
that usually are a race condition.  From here I examined my code, 
checked out all the locking stuff, made sure it was good, and wasn't 
able to find anything.  Being that there's one lock and the critical 
sections are well defined, I'm having difficulty.  One idea I have to 
try and get a better understanding might be to check data before its 
stored.  Again, I still don't know how it would get messed up nor can I 
reproduce the error on my own. 

Do any of you think that would be a good practice for trying to track 
this down? (Check the data after reading it, check the data before 
saving it)



-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From gagsl-py at yahoo.com.ar  Wed Jan 17 06:20:01 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 17 Jan 2007 08:20:01 -0300
Subject: How to convert float to sortable integer in Python
In-Reply-To: <1169015814.960023.40310@a75g2000cwd.googlegroups.com>
References: <1168939312.223194.184770@l53g2000cwa.googlegroups.com>
	<pan.2007.01.16.09.53.46.92208@REMOVE.THIS.cybersource.com.au>
	<1169015814.960023.40310@a75g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20070117070716.04691c98@yahoo.com.ar>

At Wednesday 17/1/2007 03:36, shellon wrote:

>I'm sorry I mistake the function name, the function is
>floatToRawIntBits(), it convert ieee 754 floating point number to
>integer,  e.g. if f1>f2 then floatToRawBits(f1) > floatToRawBits(f1)
>I want convert floating point number to sortable string to index in
>Lucene, so I want first to conver the floating point number to integer
>first, and than convert the integer to sortable string?

The following two functions may be useful; they do more-or-less the 
same thing, but returning a string instead of an integer.
Note that this property: f1>f2 => floatToRawBits(f1) > 
floatToRawBits(f2), only holds for  nonnegative numbers; this code 
has the same restriction.

The code assumes a few things: float(repr(x))==x for 0.5<=x<1 (that 
is, repr(x) is exact in that range); the maximum double value has an 
exponent (as given by frexp) less than 5000; the minimum positive 
value has an exponent greater than -5000; 0 is the only number having 
mantissa==0; and surely I'm assuming many more but I'm not aware of 
them. I think it's not dependent on a particular FP hardware or representation.
Beasts like denormals, INFs and NaNs are not considered at all. It 
appears to work OK for "normal" numbers, but I've not checked all 
corner cases. It was only tested on Windows XP.
After such long disclaimer... I hope it's useful :)

--- begin fpsrepr.py ---
import math

def float2srepr(f):
     """Convert a floating point number into a string representation
     which can be sorted lexicographically maintaining the original
     numerical order (only for numbers >= 0).
     That is, given f1,f2 >= 0, f1<f2 <=> float2srepr(f1)<float2srepr(f2)
     Denormals, INFs, NaNs are not handled at all!

     format: Seeeem*
       S   : sign, "0" for +, else "-"
       eeee: exponent + 5000 (never negative)
       m*  : mantissa, one or more chars as needed,
             0.5<=mantissa<1, without the leading "0."
     """
     try: m, e = math.frexp(f)
     except ValueError,E:
         E.args = list(E.args) + [repr(f)]
         raise
     if m < 0:
         sign = '-'
         m = -m
     else:
         sign = '0'
     e = e+5000
     if m==0.0: e = 0
     return "%s%04.4d%s" % (sign, e, repr(m)[2:])

def srepr2float(s):
     """Convert a string in the format used by float2srepr
     into a floating point number.
     srepr2float(float2srepr(x)) == x
     """
     sign, e, m = s[0], s[1:5], s[5:]
     neg = sign == '-'
     e = int(e)
     e = e-5000
     m = float('0.'+m)
     if m==0: f = 0
     else: f = math.ldexp(m, e)
     if neg: f = -f
     return f

# test

def find_eps(): # smallest x such 1+x!=1
     prev, curr = 1.0, 0.5
     while 1.0+curr > 1.0 and curr < prev:
         prev = curr
         curr /= 2.0
     return prev

def find_minf(): # smallest x such x>0
     prev, curr = 1.0, 0.5
     while curr > 0.0 and curr < prev:
         prev = curr
         curr /= 2
     return prev

eps = find_eps()
print "eps=%r %r" % (eps, 1.0+eps)
minf = find_minf()
print "minf=%r %r" % (minf, -minf)

values = [0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,
     1.0,1.0+eps,1.0+2*eps,1.0-eps,1.0-2*eps,
     2,3,10,10.0000001,10.00000000001,
     123.456,1234.567,12345.678,123456.789,1.234e10,
     123412341234,123412341234123412341234.0,1.234e20,
     1e100,1e200,1e300,math.pi,math.e]
values += [1.0/x for x in values if x>0] + [eps, minf]
values += [-x for x in values]
values = sorted(values)
for x in values:
    s = float2srepr(x)
    xr = srepr2float(s)
    print '%-30r %s' % (x, s)
    assert x==xr, '%r!=%r' % (x, xr)

f2svalues = [float2srepr(x) for x in values if x>=0]
s2fvalues = [srepr2float(x) for x in sorted(f2svalues)]
assert s2fvalues == sorted(s2fvalues), s2fvalues
--- end fpsrepr.py ---


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From gagsl-py at yahoo.com.ar  Sun Jan 28 20:41:30 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 28 Jan 2007 22:41:30 -0300
Subject: IP address
In-Reply-To: <epi8e2$ti7$1@sea.gmane.org>
References: <mailman.3244.1169978684.32031.python-list@python.org>
	<ephtph$fcl$1@minji.szn.dk> <epi8e2$ti7$1@sea.gmane.org>
Message-ID: <7.0.1.0.0.20070128223459.046e4ef0@yahoo.com.ar>

At Sunday 28/1/2007 10:28, Colin J. Williams wrote:

>Klaus Alexander Seistrup wrote:
> >
> > python -c 'import re, urllib; print re.findall("<title>Your IP: 
> (.+?)</title>", urllib.urlopen("http://myip.dk/").read())[0]'
> >
>
>Your one-liner doesn't work for me, with Windows XP, but the following

On XP you should switch the usage of " and ' (double quotes are used 
to enclose command arguments with embedded spaces):

python -c "import re, urllib; print re.findall('<title>Your IP: 
(.+?)</title>', urllib.urlopen('http://myip.dk/').read())[0]"


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From Boris.Boutillier at gmail.com  Thu Jan 25 14:46:52 2007
From: Boris.Boutillier at gmail.com (Boris.Boutillier at gmail.com)
Date: 25 Jan 2007 11:46:52 -0800
Subject: Module for SVG?
In-Reply-To: <mailman.3164.1169751502.32031.python-list@python.org>
References: <mailman.3164.1169751502.32031.python-list@python.org>
Message-ID: <1169754412.101443.280390@h3g2000cwc.googlegroups.com>

Depending on the size of your project, the xist library from living
logic is supporting svg xml:
http://www.livinglogic.de/Python/xist/
http://www.livinglogic.de/Python/xist/ns/svg/

We've used it successfully, but later on came back to simply use the
standard dom creation tools in python to reduce dependencies.

Boris

On Jan 25, 10:58 am, "Sebastian Bassi" <sba... at clubdelarazon.org>
wrote:
> Hello,
>
> I foundhttp://www2.sfk.nl/svgas a Python module for writing SVG.
> Last update was in 2004 and I am not sure if there is something
> better.
> Any recommendation for generating SVG graphics?
> Best,
> SB.



From felipe.lessa at gmail.com  Sun Jan  7 06:57:54 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 7 Jan 2007 09:57:54 -0200
Subject: Why less emphasis on private data?
In-Reply-To: <7x7ivz88af.fsf@ruckus.brouhaha.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
Message-ID: <c2701f5c0701070357r385b0d4fn7d37055cfd3026ca@mail.gmail.com>

On 07 Jan 2007 02:01:44 -0800, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:
> >       __ (two leading underscores) results in name-mangling. This /may/ be
> > used to specify "private" data, but is really more useful when one is
> > designing with multiple super classes:
>
> Trouble with this is you can have two classes with the same name,
> perhaps because they were defined in different modules, and then the
> name mangling fails to tell them apart.

What is the chance of having to inherit from two classes from
different modules but with exactly the same name *and* the same
instance variable name?

Of course you're being very pessimistic or extremely unlucky.

-- 
Felipe.


From gheissenberger at gmail.com  Thu Jan 11 18:43:18 2007
From: gheissenberger at gmail.com (gheissenberger at gmail.com)
Date: 11 Jan 2007 15:43:18 -0800
Subject: Python nuube needs Unicode help
In-Reply-To: <mailman.2600.1168552888.32031.python-list@python.org>
References: <1168550894.155528.295700@p59g2000hsd.googlegroups.com>
	<mailman.2600.1168552888.32031.python-list@python.org>
Message-ID: <1168558998.056454.265720@p59g2000hsd.googlegroups.com>

Yeah, that's what i don't know how to do.

Chris Mellon wrote:
> On 11 Jan 2007 13:28:14 -0800, gheissenberger at gmail.com
> <gheissenberger at gmail.com> wrote:
> > HELP!
> > Guy who was here before me wrote a script to parse files in Python.
> >
> > Includes line:
> > print u
> > where u is a line from a file we are parsing.
> > However, we have started recieving data from Brazil. If I open file to
> > parse in VI, looks like:
> >
> > <Utt id="3" transcribe="yes" audioRoot="A1"
> > audio="313-20070102144528.wav" grammarSet="G3" rawText="n&#227;o"
> > recValue="{data:CHOICE=NO;}" conf="970" rawText2="" conf2="0"
> > transcribedText="n&#227;o" parsableText="n&#227;o"/
> >
> > Clearly those "n&#227" are some non-Ascii characters, but how do I get
> > print to understand that?
> >
> > I keep getting:
> > "UnicodeEncodeError: 'ascii' codec can't encode character u'\xe3' in
> > position 40:
> >  ordinal not in range(128)"
> >
>
> Find out what encoding the files are in and modify the script to use it.



From wolf_tracks at invalid.com  Fri Jan  5 11:48:02 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Fri, 05 Jan 2007 08:48:02 -0800
Subject: Just Getting Started with Python on MS XP Pro
Message-ID: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>

What do I download to use Python with MX XP Pro on an ASUS 4 year old 
motherboard? I would guess a good book source for starters would be the 
O'Reilly book.

          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

              ""I do not fear death. I had been dead for billions
                and billions of years before I was born, and had
                not suffered the slightest inconvenience from it."
                    -- Mark Twain (a nod to evolution)
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From sxn02 at yahoo.com  Fri Jan 12 17:44:45 2007
From: sxn02 at yahoo.com (Sorin Schwimmer)
Date: Fri, 12 Jan 2007 14:44:45 -0800 (PST)
Subject: Python 2.5 install on Gentoo Linux: failed dmb and _tkinter
Message-ID: <520770.90567.qm@web56014.mail.re3.yahoo.com>

# ldconfig -p | grep "/usr/local/lib"
        libtk8.4.so (libc6)
=> /usr/local/lib/libtk8.4.so
        libtcl8.4.so (libc6) =>
/usr/local/lib/libtcl8.4.so

Sorin


 
____________________________________________________________________________________
Now that's room service!  Choose from over 150,000 hotels
in 45,000 destinations on Yahoo! Travel to find your fit.
http://farechase.yahoo.com/promo-generic-14795097


From jmike at alum.mit.edu  Fri Jan 12 10:10:54 2007
From: jmike at alum.mit.edu (jmike at alum.mit.edu)
Date: 12 Jan 2007 07:10:54 -0800
Subject: Command line arguments on Vista
In-Reply-To: <1168613488.896113.326290@l53g2000cwa.googlegroups.com>
References: <1168613362.406648.304720@11g2000cwr.googlegroups.com>
	<1168613488.896113.326290@l53g2000cwa.googlegroups.com>
Message-ID: <1168614654.142099.90680@11g2000cwr.googlegroups.com>

Some further information: perl seems to do the same thing (losing
arguments).
We think it may have something to do with file association.

Any ideas anyone?
   --JMike



From martin at v.loewis.de  Sat Jan 27 07:34:39 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 27 Jan 2007 13:34:39 +0100
Subject: New vs Old Style Python Classes in C Extensions?
In-Reply-To: <mailman.3230.1169896140.32031.python-list@python.org>
References: <mailman.3230.1169896140.32031.python-list@python.org>
Message-ID: <45BB46DF.7000604@v.loewis.de>

Jeff Rush schrieb:
> from cextension import Context
> 
> class MyContext(Context):
> 
>     def __init__(self):
>         super(Context, self).__init__()
> 
> repeatedly and reliably failed with a corrupted C data structure, while
> this:
> 
> class MyContext(Context):
> 
>     def __init__(self):
>         Context.__init__()
> 
> worked without any problems.  As I understand it, the former uses
> new-style semantics while the latter uses old-style, 

This understanding is incorrect: Context is either a new-style
or an old-style class (if type(Context) is type, it's a new-style
class, if type(context) is named 'classobj', it's an old-style
class).

As you have implemented Context in an extension module, it likely
is a new-style class (i.e. a type).

Most likely, something is wrong with your tp_init slot. You
shouldn't be able to call Context.__init__(): that should
raise a type error, indicating that an object is needed
for the method __init__. That should hold whether Context
is a new-style or an old-style class.

HTH,
Martin


From gandalf at designaproduct.biz  Fri Jan  5 11:54:50 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Fri, 05 Jan 2007 17:54:50 +0100
Subject: importing / loading a module / class dynamically
In-Reply-To: <1hvnh.22241$Dy2.9812@newsfe20.lga>
References: <o1vnh.281$rv1.88@newsfe21.lga> <1hvnh.22241$Dy2.9812@newsfe20.lga>
Message-ID: <459E82DA.1030503@designaproduct.biz>

hg ?rta:
> hg wrote:
>
>   
>> Hi,
>>
>> I have the following problem.
>>
>> I find in a directory hierarchy some files following a certain sets of
>> rules:
>>
>> .../.../../plugin/name1/name1.py
>> ....
>> .../.../../plugin/namen/namen.py
>>
>> each file will in turn have a class with the same name as the filename
>> (minus .py)
>>
>>
>> I fetch those names in a list of string and want to import the files /
>> instantiate the classes.
>>
>>
>> I block at the beginning and tried this (test.py is a real file)
>>     
>>>>> s = 'test.py'
>>>>> eval ('import ' + s)
>>>>>           
>> and get
>>
>> Traceback (most recent call last):
>>   File "<pyshell#1>", line 1, in -toplevel-
>>     eval ('import ' + s)
>>   File "<string>", line 1
>>     import test.py
>>
>> Any clue ?
>>
>> Thanks
>>
>> hg
>>     
>
>
> OK, from http://mail.python.org/pipermail/python-list/2004-July/272081.html,
> I need to use exec and not eval
>   
Well, you can also use the 'imp' module. You should read this:

http://docs.python.org/lib/module-imp.html

Best,

   Laszlo



From nmm1 at cus.cam.ac.uk  Tue Jan  9 15:15:06 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 9 Jan 2007 20:15:06 GMT
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
	<envur1$rq1$1@gemini.csx.cam.ac.uk>
	<50i49iF1fvo3rU1@mid.individual.net>
	<mailman.2493.1168371116.32031.python-list@python.org>
Message-ID: <eo0t4a$28g$1@gemini.csx.cam.ac.uk>


In article <mailman.2493.1168371116.32031.python-list at python.org>,
Robert Kern <robert.kern at gmail.com> writes:
|> > 
|> >> No, don't.  That is about another matter entirely, 
|> > 
|> > It isn't.
|> 
|> Actually it really is. That thread is about the difference between
|> str(some_float) and repr(some_float) and why str(some_tuple) uses the repr() of
|> its elements.

Precisely.  And it also applies to strings, which I had failed to
notice:

>>> print ("1","2")
('1', '2')
>>> print "1", "2"
1 2


Regards,
Nick Maclaren.


From w.richert at gmx.net  Tue Jan 23 05:28:05 2007
From: w.richert at gmx.net (Willi Richert)
Date: Tue, 23 Jan 2007 11:28:05 +0100
Subject: Getting to an SSH account over a HTTP proxy
In-Reply-To: <1169514995.916358.17030@11g2000cwr.googlegroups.com>
References: <mailman.2985.1169469575.32031.python-list@python.org>
	<1169514995.916358.17030@11g2000cwr.googlegroups.com>
Message-ID: <200701231128.05998.w.richert@gmx.net>

Am Dienstag, 23. Januar 2007 02:16 schrieb Nanjundi:
> BJ?rn Lindqvist wrote:
> > I want to use Python to connect to a SSH account over a HTTP proxy to
> > automate some operations. I thought paramiko would be able to do that,
> > but it can not (it seems).
> >
> > Is there some other Python module that can do what I want?
> >
> > --
> > mvh Bj?rn
>
> Did you take a look at twisted library?
> twistedmatrix.com
> http://twistedmatrix.com/projects/core/documentation/howto/clients.html
>
>
> I haven't tried to connect over port 80, but its worth a try.
>
> -N

If you need it for automation you might want to use pexpect: 
http://pexpect.sourceforge.net/

It listens to the tty-stream and simulates a user typing in commands. It is 
very useful, e.g. if you want to start processes on many machines over ssh. 
If there are gateways/firewalls between - no problem just use a 
second "sendline('ssh user at nextmachine')"

The only problem is the regular expression: If e.g. you use a custom $PS1 
variable for your prompt you have to account for that.

Regards,
wr


From bruno.desthuilliers at websiteburo.com  Thu Jan 18 11:05:21 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Thu, 18 Jan 2007 17:05:21 +0100
Subject: variable scope
In-Reply-To: <mailman.2873.1169134976.32031.python-list@python.org>
References: <mailman.2873.1169134976.32031.python-list@python.org>
Message-ID: <45af9ac4$0$290$426a34cc@news.free.fr>

gonzlobo a ?crit :
> Greetings,
> I've been using Python to successfully parse files. When the entire
> program was smaller, the variable firstMsg worked fine, but now
> doesn't because it's used in function PID_MinMax. I know it's a result
> of variables and their scope.
> 
> I declare the variable 'firstMsg = 0' in the main loop, pass it to the
> function 'PID_MinMax(firstMsg, PID)'. When the function increments the
> variable, it doesn't pass it back to the main program. What am I doing
> wrong?
> 
> 
> ---- major snippage) ---
> firstMsg = 0
(snip)
> def PID_MinMax(firstMsg, PID):
(snip)
>    if firstMsg != 0:
      if firstMsg:
>        tDelta = tCurrent - pLast[idx]
>        if tDelta > pMax[idx]:
>            pMax[idx] = tDelta
>        if tDelta < pMin[idx]:
>            pMin[idx] = tDelta
>    elif firstMsg == 0:
      else:
>        firstMsg = 1
>    pLast[idx] = tCurrent
>    print pMin, pMax
>    return firstMsg

> ############## main ##############
(snip)
>         if PID in pPIDs:
>             PID_MinMax(firstMsg, PID)
               firstMsg = PID_MinMax(firstMsg, PID)

You're returning firstMsg from PID_MinMax, but discarding the value...


From gagsl-py at yahoo.com.ar  Sun Jan 28 21:08:00 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 28 Jan 2007 23:08:00 -0300
Subject: socket.inet_ntop, and pton question
In-Reply-To: <45bce8f7$0$334$e4fe514c@news.xs4all.nl>
References: <12rpns1tkp0e34@corp.supernews.com>
	<45bce8f7$0$334$e4fe514c@news.xs4all.nl>
Message-ID: <7.0.1.0.0.20070128230430.047092a8@yahoo.com.ar>

At Sunday 28/1/2007 15:17, Irmen de Jong wrote:

> > Are these functions (inet_ntop(), inet_pton()) from the socket library
> > supported on Windows.
>
>Why didn't you just try:
>
>[E:\Projects]python
>Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit 
>(Intel)] on win32
>Type "help", "copyright", "credits" or "license" for more information.
>  >>> import socket
>  >>> socket.inet_aton("127.0.0.1")
>'\x7f\x00\x00\x01'
>  >>> socket.inet_ntoa(_)
>'127.0.0.1'
>  >>>

But these are not the requested functions, inet_ntop() and inet_pton():

py> socket.inet_ntop
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
AttributeError: 'module' object has no attribute 'inet_ntop'


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From steve at REMOVEME.cybersource.com.au  Tue Jan  2 02:15:18 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 02 Jan 2007 18:15:18 +1100
Subject: mutable numeric type
References: <mailman.2193.1167708425.32031.python-list@python.org>
Message-ID: <pan.2007.01.02.07.15.17.447929@REMOVEME.cybersource.com.au>

On Mon, 01 Jan 2007 19:20:21 -0800, Andreas Beyer wrote:

> I am using a third party library that is performing basic numerical 
> operations (adding, multiplying, etc.) with objects of unknown type. Of 
> course, the objects must support the numerical operators. In my case the 
> third party library is a graph algorithm library and the assigned 
> objects are edge weights. I am using the library to compute node 
> distances, etc.
> 
> I would like to be able to change the edge weights after creating the 
> edges. Otherwise, I would have to remove the edges and re-create them 
> with the new values, which is quite costly.

You've measured it or you're guessing?

Presumably the edges and/or nodes store the weights somewhere. Why not
just reassign the weight directly in place?

It isn't easy to judge whether your scheme is good bad or indifferent when
we know so little about the graph library you are using.


> Since I also didn't want to change the code of the graph library, 

You could subclass the graph class.

Another possibility is to dynamically modify the library, without changing
its source code. E.g.


from GraphLibrary import GraphWalker as _gw
import GraphLibrary

def myGraphWalker(args):
    x = _gw(args)
    do_something_to(x)
    return x

GraphLibrary.GraphWalker = myGraphWalker
# now use GraphWalker as normal, except it has your 
# code instead of the original

This works for class methods as well.


> I came up with a mutable numeric 
> type, which implements all the numerical operators (instances are of 
> course not hashable). This allows me to change the edge weights after 
> creating the graph.

This is another alternative, although I still don't understand why you
can't just reassign the weights in place.


-- 
Steven D'Aprano 



From deets at nospam.web.de  Mon Jan  1 17:04:23 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 01 Jan 2007 23:04:23 +0100
Subject: Writing more efficient code
In-Reply-To: <mailman.2185.1167676577.32031.python-list@python.org>
References: <mailman.2185.1167676577.32031.python-list@python.org>
Message-ID: <4vter8F1div1lU1@mid.uni-berlin.de>

gonzlobo schrieb:
> Greetings, and happyNewYear to all.
> 
> I picked up Python a few weeks ago, and have been able to parse large
> files and process data pretty easily, but I believe my code isn't too
> efficient. I'm hoping dictionaries will help out, but I'm not sure the
> best way to implement them.
> 
> I've been using a bunch of nested if/elif/else statements to select
> slices (0317 & 03de) from a file, then parse the data (aa, hh, bb,
> d2-d9) into parameters (a = airspeed, h = heading) & flags.
> 
> #sample file contents
> 0000007d 03 0317 aa aa aa aa aa hh hh hh bb bb
> 0000007e 06 03de d2 d3 d4 d5 d6 d7 d8 d9 10 11
> 
> # some pseudo code
> if PID == '03de':
>    flapsCmd = int(d3, 16)
>   if flapsCmd == 0xc0:
>      <flaps up code>
>   elif flapsCmd == 0x03:
>      <flaps down code>
> if PID == '0317':
>   airspeed == 'combine aa for airspeed & multiply by 0.1'
>   heading == 'combine hh for heading'
>   mach == 'combine bb for mach & multiply by 0.01'
> 
> Might dictionaries help in this case... say Label0317(parameterName,
> slice (d3), scaleFactor(0.1))... I'd like to use them if they'll
> replace the dozens of nested conditionals.  I have roughly 75
> different parameters to decode from a file containing ~2.5 million
> lines of data.
> 
> I know my pseudo code lacks details, but hopefully I'm getting my
> point across...
> 
> (I suppose switch/select/case statements would help a bit, but python
> doesn't seem to use them... not to start a religious war or anything).

The dictionary approach certainly will be speedier - lookup should 
usually be O(1) instead of O(n) for the if-elif-chain.

Diez


From gftframe at gmail.com  Sun Jan 28 21:57:02 2007
From: gftframe at gmail.com (GFT)
Date: 28 Jan 2007 18:57:02 -0800
Subject: New internet services from MSN Yahoo! and Google are here
Message-ID: <1170039422.555664.225190@l53g2000cwa.googlegroups.com>

See our explain and compare about new service or feature from three
search providers ; Windows Live (MSN) ,Yahoo! ,and Google.
Learn more and get it today.
At http://searchprovider.awardspace.com/
Thank you very much.



From nmm1 at cus.cam.ac.uk  Wed Jan 24 15:16:26 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 24 Jan 2007 20:16:26 GMT
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
Message-ID: <ep8eqq$284$1@gemini.csx.cam.ac.uk>


In article <mailman.3105.1169664198.32031.python-list at python.org>,
"Carl J. Van Arsdall" <cvanarsdall at mvista.com> writes:
|> Chris Mellon wrote:
|> >
|> > Logic and programming errors in user code are far more likely to be
|> > the cause of random errors in a threaded program than theoretical
|> > (I've never come across a case in practice) issues with the POSIX
|> > standard.
|> >   
|> Yea, typically I would think that.  The problem I am seeing is 
|> incredibly intermittent.  Like a simple pyro server that gives me a 
|> problem maybe every three or four months.  Just something funky will 
|> happen to the state of the whole thing, some bad data, i'm having an 
|> issue tracking it down and some more experienced programmers mentioned 
|> that its most likely a race condition.  THe thing is, I'm really not 
|> doing anything too crazy, so i'm having difficult tracking it down.  I 
|> had heard in the past that there may be issues with threads, so I 
|> thought to investigate this side of things. 

I have seen that many dozens of times on half a dozen Unices, but have
only tracked down the cause in a handful of cases.  Of those,
implementation defects that are sanctioned by the standards have
accounted for about half.

Note that the term "race condition" is accurate but misleading!  One
of the worst problems with POSIX is that it does not define how
non-memory global state is synchronised.  For example, it is possible
for a memory update and an associated signal to occur on different
sides of a synchronisation boundary.  Similarly, it is possible for
I/O to sidestep POSIX's synchronisation boundaries.  I have seen both.

Perhaps the nastiest is that POSIX leaves it unclear whether the
action of synchronisation is transitive.  So, if A synchronises with
B, and then B with C, A may not have synchronised with C.  Again, I
have seen that.  It can happen on Intel systems, according to the
experts I know.

|> Would you consider the Linux implementation of threads to be concrete?

In this sort of area, Linux tends to be saner than most systems, but
remember that it has had MUCH less stress testing on threaded codes
than many other Unices.  In fact, it was only a few years ago that
Linux threads became stable enough to be worth using.

Note that failures due to implementation defects and flaws in the
standards are likely to show up in very obscure ways; ones due to
programmer error tend to be much simpler.

If you want to contact me by Email, and can describe technically
what you are doing and (most importantly) what you are assuming, I
may be able to give some hints.  But no promises.


Regards,
Nick Maclaren.


From martin at v.loewis.de  Thu Jan 11 01:33:43 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 11 Jan 2007 07:33:43 +0100
Subject: Python 2.5 install on Gentoo Linux: failed dmb and _tkinter
In-Reply-To: <mailman.2547.1168468767.32031.python-list@python.org>
References: <mailman.2547.1168468767.32031.python-list@python.org>
Message-ID: <45a5da47$0$32703$9b622d9e@news.freenet.de>

Sorin Schwimmer schrieb:
> *** WARNING: renaming "_tkinter" since importing it
> failed: libtk8.4.so: cannot open shared object file:
> No such file or directory
> running build_scripts
> 
> I have libtk:
> 
> # ls -l /usr/local/lib/libtk8.4.so
> -r-xr-xr-x 1 root root 906285 Jan 10 16:08
> /usr/local/lib/libtk8.4.so
> 
> I need Tkinter for sure, and I'll like to have dbm.
> How should I proceed?

Did you add /usr/local/lib to /etc/ld.so.conf?

Regards,
Martin


From nagle at animats.com  Tue Jan 23 20:50:37 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 24 Jan 2007 01:50:37 GMT
Subject: Python does not play well with others
Message-ID: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>

   The major complaint I have about Python is that the packages
which connect it to other software components all seem to have
serious problems.  As long as you don't need to talk to anything
outside the Python world, you're fine.  But once you do, things
go downhill.  MySQLdb has version and platform compatibility
problems.  So does M2Crypto.  The built-in SSL support is weak.
Even basic sockets don't quite work right; the socket module
encapsulates the timeout mechanism but doesn't get it right.

   In the Perl, Java, PHP, and C/C++ worlds, the equivalent
functions just work.   That's because, in those worlds, either the
development team for the language or the development team
for the subsystem takes responsibility for making them work.
Only Python doesn't do that.

   Python has been around long enough that this should have
been fixed by now.

					John Nagle


From DouhetSukd at gmail.com  Sat Jan  6 01:23:19 2007
From: DouhetSukd at gmail.com (DouhetSukd at gmail.com)
Date: 5 Jan 2007 22:23:19 -0800
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
Message-ID: <1168064599.558820.9410@42g2000cwt.googlegroups.com>

Wise choice + welcome to the club.

Though Python is open source and well appreciated on Linux, I think you
will find that most people in this newsgroup will be fairly courteous
about _your_ choice of platform.  Some will not know about the weird
process forking stuff on windows and helpfully suggest that 'if you
were to use a real OS...'.  But in reality Python is just as happy on
XP as on Linux and the lack of scripting/shell alternatives on XP makes
it all the more useful there.

The only real XP drawback is that Python is not bundled on Windows,
while it is included with OS X and most (all?) Linux distros.

So, giving a *.py program to another XP user means little by itself, it
needs to be either packaged in an exe (see py2exe) or you need to get
your buddy to install python on their machine.


In descending order of cheapness/usefullness.

1.  download python + work through the tutorial.  well, maybe not all
of it, but with pythonwin around, you can try out significant snippets
quickly.


2.  use any ol' text editor that _you_ are familiar with, save to file,
and python <file> under DOS.  later on you can always pick an editor.
i prefer eclipse + pydev, yes, even on windows.

personally, i find pythonwin _great_ to test out code interactively,
mediocre to write lots of code with and occasionally handy to debug
code in.

if you hate typing python <file> under DOS, then I guess you will have
to run programs from pythonwin.


3.  internet

this newsgroup is very informative.

dive into python, pretty good net resource

www.diveintopython.org



4.  books:

Learning Python, isbn 0596002815, is pretty good.

Python Programming on Win32, isbn 1565926218, is good, if a bit dated
(2000, covers COM but no .Net)

In depth Python - Python in a Nutshell, isbn 0596100469


5.  GUI stuff.

wxPython.  If, like me, you hate handcoding everything and want a VB
drag&drop clone you will have to look around for someone else's advice
- there are several such editors that do wxPython but I have never
found anything entirely to my liking.  I am sure others will chime in
with their recommendations.


6.  Database stuff.

Personally, working on MS SQL, I vouch for mxODBC - shareware, which I
used for years without paying, until I decided the guy had definitely
earned my $75.

http://www.egenix.com/files/python/eGenix-mx-Extensions.html


7.  Prepping *.py programs for distribution to users w.o. Python

py2exe - www.py2exe.org/

Best o' luck.



From maksim.kasimov at gmail.com  Mon Jan 15 11:12:12 2007
From: maksim.kasimov at gmail.com (Maksim Kasimov)
Date: Mon, 15 Jan 2007 18:12:12 +0200
Subject: __getattr__ equivalent for a module
Message-ID: <eog94u$jd4$1@news.lucky.net>

Hi,

in any python class it is possible to define __getattr__ method so that if we try to get some value of not actually exists instance attribute, we can get some default value.

For example:

class MyClass:

	def __getattr__(self, attname):

		if attname.startswith('a'):
			return "*"


i = MyClass()
...
i.aValue # it gives "*" if "i.aValue" will not be set before this call


i need to define the same behavior for a module:

import mymodule
mymodule.anyattribute
or
from mymodule import anyattribute

"anyattribute" is not actually defined in the module, but gives some attribute of the module

so my question is: how to tune up a module get default attribute if we try to get access to not actually exists attribute of a module?

(python 2.4 or 2.2)

many thanks for help.


-- 
Maksim Kasimov


From jonc at icicled.net  Sat Jan  6 05:02:25 2007
From: jonc at icicled.net (Jonathan Curran)
Date: Sat, 6 Jan 2007 04:02:25 -0600
Subject: python, zlib, and fedora 64bits
In-Reply-To: <94bdd2610701060147i6725e52bgdcc3d81377366ecd@mail.gmail.com>
References: <94bdd2610701060147i6725e52bgdcc3d81377366ecd@mail.gmail.com>
Message-ID: <200701060402.25665.jonc@icicled.net>

On Saturday 06 January 2007 03:47, Tarek Ziad? wrote:
> Hello,
>
> I am trying to compile Python on a Fedora 64bits, and I can't make zlib
> work.
>
> a python setup.py build leads to :
>
> ...
> building 'zlib' extension
> gcc -pthread -shared
> build/temp.linux-x86_64-2.4/usr/local/src/Python-2.4.4/Modules/zlibmodule.o
> -L/opt/python-2.4.4/lib -L/usr/local/lib -lz -o build/lib.linux-x86_64-2.4
> /zlib.so
> /usr/bin/ld: /usr/local/lib/libz.a(crc32.o): relocation R_X86_64_32 against
> `a local symbol' can not be used when making a shared object; recompile
> with -fPIC
> /usr/local/lib/libz.a: could not read symbols: Bad value
> collect2: ld gab 1 als Ende-Status zur?ck
> running build_scripts
> running install_lib
> ...
>
> I've tried to recompile zlib, but didn't find any way to avoid this error
>
> any ideas ?
>
> Otherwise, does anyone has a zlib.so for fedora 64bits to send me ?
>
> Thx
>
> Tarek

Tarek, I would first check and see if fedora offers python for a 64-bit 
environment. If so, it would be easier to get python up and running quickly. 
I haven't used any redhat deviant in a while, but I think the command should 
be: yum search python. This should bring up a list of packages that are 
installable. The rest should be simple as: yum install <package name>. I hope 
this helps.

- Jonathan


From bdesth.quelquechose at free.quelquepart.fr  Mon Jan  8 15:38:03 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 08 Jan 2007 21:38:03 +0100
Subject: Working with Excel inside Python
In-Reply-To: <1168256052.090472.54890@s80g2000cwa.googlegroups.com>
References: <1168205727.130771.257030@51g2000cwl.googlegroups.com>
	<LHeoh.407$uL1.363@newsfe22.lga>
	<1168218370.688414.171150@s80g2000cwa.googlegroups.com>
	<x0hoh.8631$w91.5334@newsread1.news.pas.earthlink.net>
	<1168256052.090472.54890@s80g2000cwa.googlegroups.com>
Message-ID: <45a2a563$0$291$426a74cc@news.free.fr>

AleydisGP at gmail.com a ?crit :
> Sorry for my little knowledge on Python. Actually my knowledge is
> specific for automating geo-processing tasks within ESRI environment,
> but sometimes I need to automate some other tasks (like this one) which
> require more in-depth knowledge of this language.

I would definitively not qualify function call syntax as "in-depth 
knowledge"

> Lots of documentation are of no use when you don't know exactly what to
> look for or have a wrong idea of what to do.

http://docs.python.org/tut/tut.html


From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 19 14:30:21 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 20 Jan 2007 06:30:21 +1100
Subject: when format strings attack
References: <1169207467.989977.162940@q2g2000cwa.googlegroups.com>
	<mailman.2908.1169221530.32031.python-list@python.org>
	<1169232233.469572.298320@a75g2000cwd.googlegroups.com>
Message-ID: <pan.2007.01.19.19.30.20.395605@REMOVE.THIS.cybersource.com.au>

On Fri, 19 Jan 2007 10:43:53 -0800, John Zenger wrote:

> Perhaps it is not as severe a security risk, but pure Python programs
> can run into similar problems if they don't check user input for %
> codes.

Please don't top-post.

A: Because it messes up the order that we read things.
Q: Why?
A: Top-posting.
Q: What is the most annoying newsgroup habit?


> Example:
> 
>>>> k = raw_input("Try to trick me: ")
> Try to trick me: How about %s this?
>>>> j = "User %s just entered: " + k
>>>> print j % "John"
> Traceback (most recent call last):
>   File "<pyshell#8>", line 1, in ?
>     print j % "John"
> TypeError: not enough arguments for format string

That's hardly the same sort of vulnerability the article was talking
about, but it is a potential bug waiting to bite.

In a serious application, you should keep user-inputted strings separate
from application strings, and never use user strings unless they've been
made safe. See Joel Spolsky's excellent article about one way of doing
that:

http://www.joelonsoftware.com/articles/Wrong.html



-- 
Steven.



From manuel.graune at koeln.de  Tue Jan 23 17:10:41 2007
From: manuel.graune at koeln.de (Manuel Graune)
Date: Tue, 23 Jan 2007 23:10:41 +0100
Subject: Are there sprintf in Python???
References: <1169496238.925052.311660@l53g2000cwa.googlegroups.com>
Message-ID: <m3irex1jj2.fsf@uriel.graune.org>

"questions?" <universal_used at hotmail.com> writes:

> Are there any sprintf in Python?
> I know you can print to files(or redefine sys.stout) and later open the
> file content.


Are you looking for something like this?

http://norvig.com/python-iaq.html

or

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/112546





-- 
A hundred men did the rational thing. The sum of those rational choices was
called panic. Neal Stephenson -- System of the world
http://www.graune.org/GnuPG_pubkey.asc
Key fingerprint = 1E44 9CBD DEE4 9E07 5E0A  5828 5476 7E92 2DB4 3C99


From tubby at bandaheart.com  Mon Jan 29 09:06:27 2007
From: tubby at bandaheart.com (tubby)
Date: Mon, 29 Jan 2007 09:06:27 -0500
Subject: pdf to text
In-Reply-To: <uwt3azphd.fsf@CoCreate.com>
References: <epb638$gd4$1@solaris.cc.vt.edu>	<86714$45b9254c$54d1d767$3741@news.chello.no>	<epb9s7$nnk$1@solaris.cc.vt.edu>
	<uwt3azphd.fsf@CoCreate.com>
Message-ID: <epkv25$44l$1@solaris.cc.vt.edu>

Dieter Deyke wrote:
>>     sout = os.popen('pdftotext "%s" - ' %f)

> Your program above should read:
> 
>    sout = os.popen('pdftotext "%s" - ' % (f,))

What is the significance of doing it this way?


From gherron at islandtraining.com  Wed Jan 24 16:12:35 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 24 Jan 2007 13:12:35 -0800
Subject: Static variables
In-Reply-To: <ep8gkl$g7v$3@news.in.tum.de>
References: <ep8gkl$g7v$3@news.in.tum.de>
Message-ID: <45B7CBC3.9030003@islandtraining.com>

Florian Lindner wrote:
> Hello,
> does python have static variables? I mean function-local variables that keep
> their state between invocations of the function.
>
> Thanks,
>
> Florian
>   
Nope.  Not really.

In new versions of Python, functions and methods can have attributes 
that can be used like function level static variables. 

However, I usually use module level attributes for such things.

Gary Herron



From usenet200701 at tobyinkster.co.uk  Sun Jan 28 09:38:08 2007
From: usenet200701 at tobyinkster.co.uk (Toby A Inkster)
Date: Sun, 28 Jan 2007 14:38:08 +0000
Subject: Ip address
References: <mailman.3244.1169978684.32031.python-list@python.org>
	<1169990510.352536.4760@a34g2000cwb.googlegroups.com>
	<mailman.3247.1169993423.32031.python-list@python.org>
Message-ID: <g3pu84-b0l.ln1@ophelia.g5n.co.uk>

Steve Holden wrote:

> There is absolutely no need to know the IP address of "your router" to 
> communicate with Internet devices. Either your IP layer is configured to 
> know the addresses of one or more routers, or it has discovered those 
> address by dynamic means, or you can't get off-net because there aren't 
> any routers.

... or you can't get off-net because you don't *know* the routers.

-- 
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact
Geek of ~ HTML/CSS/Javascript/SQL/Perl/PHP/Python*/Apache/Linux

* = I'm getting there!


From wise at hyperformix.com  Thu Jan 11 14:32:46 2007
From: wise at hyperformix.com (Tim)
Date: 11 Jan 2007 11:32:46 -0800
Subject: py2exe: zipfile=None raised ImportError
Message-ID: <1168543966.212663.141840@i56g2000hsf.googlegroups.com>

I'm at the end of my limited experience...

I'm using py2exe to create an executable. I'm using bundle level 1.
When I don't use the zipfile option, the executable and library.zip get
created and the executable works correctly.

When I add the zipfile=None option to put everything into the exe, the
exe doesn't work. It raises an ImportError whose traceback is:

File "...boot_common.py" ... no module name linecache
File "<install zipextimporter> ... no module named zipextimporter
File "my.py" ... no module name optparse

It looks like the imported modules are not being found in the zip, or
something didn't get included that needed to be included.

Does anybody know what's happening and how to fix it?

Thanks.
--
Tim



From __peter__ at web.de  Tue Jan 23 04:04:18 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 23 Jan 2007 10:04:18 +0100
Subject: selective logger disable/enable
References: <1169190498.593059.238150@q2g2000cwa.googlegroups.com>
Message-ID: <ep4j1t$4fc$02$1@news.t-online.com>

Gary Jefferson wrote:

> Suppose I have 3 modules that belong to a project, 'A', 'A.a' and 'B',
> and each module has its own logger, created with:
> 
> module1logger = logging.getLogger('project.A')
> 
> and
> 
> module2logger = logging.getLogger('project.A.a')
> 
> and
> 
> module3logger = logging.getLogger('project.B')
> 
> 
> And I want to selectively enable/disable these, per module (for
> example, I only want logging from A and A.a, or just from B, etc).  It
> seems like logging.Filter is supposed to let me do this, but I can't
> see how to apply it globally.  Is there really no other way that to add
> a addFilter(filter) call to each of these loggers individually?
> 
> logging.basicConfig gets inherited by all loggers, but it doesn't seem
> capable of giving a Filter to all loggers.  Is there any way to do this?

An alternative approach might be to set the 'propagate' flag:

import logging

def warn_all(loggers, message):
    for lgr in loggers:
        lgr.warn(message)

logging.basicConfig()
root = logging.getLogger()
root.manager.emittedNoHandlerWarning = True
loggers = [logging.getLogger(name) for name in """
alpha
alpha.1
alpha.2
alpha.2.1
alpha.2.2
alpha.2.2.1
beta
beta.1
beta.2
""".split()]

warn_all(loggers, "all on")

print "---"
logging.getLogger("alpha").propagate = False
warn_all(loggers, "alpha off")
logging.getLogger("alpha").propagate = True

print "---"
logging.getLogger("alpha.2").propagate = False
warn_all(loggers, "alpha.2 off")

Peter


From laurent.pointal at limsi.fr  Thu Jan 11 03:11:20 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 11 Jan 2007 09:11:20 +0100
Subject: Print message with Colors
In-Reply-To: <1168500252.143831.235250@i56g2000hsf.googlegroups.com>
References: <1168500252.143831.235250@i56g2000hsf.googlegroups.com>
Message-ID: <eo4s7b$djl$1@upsn250.cri.u-psud.fr>

prk a ?crit :
> Hi Folks,
> 
> Is there any procesure for print messages with colors.

Yes, see:

http://www.google.fr/search?q=python+print+color
http://groups.google.fr/groups?as_q=python+print+color&num=100&as_ugroup=comp.lang.python


See also ANSI escape sequences for the more general subject of color
printing on terminals.



From skip at pobox.com  Wed Jan 31 11:41:54 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 31 Jan 2007 10:41:54 -0600
Subject: subway
In-Reply-To: <5f56302b0701310802y7e45c98fmaaebe090e34d410@mail.gmail.com>
References: <5f56302b0701310802y7e45c98fmaaebe090e34d410@mail.gmail.com>
Message-ID: <17856.50898.477998.112022@montanaro.dyndns.org>


    Daniel> Does anyone know what has happened to the codebase of the subway
    Daniel> project? It seems the whole project has been shut down leaving
    Daniel> no trace of the code on net but I would be very happy to see it,
    Daniel> apparently it had some cool features that would be fun to look
    Daniel> at.  Does anyone have access to the code and/or is willing to
    Daniel> make it publically available?

No guarantee that it will have any remnants of the subway project, but the
Wayback Machine might be a good place to start:

    http://web.archive.org/web/*/http://subway.python-hosting.com

Skip


From salvatore.difazio at gmail.com  Mon Jan 15 15:20:16 2007
From: salvatore.difazio at gmail.com (Salvatore Di Fazio)
Date: 15 Jan 2007 12:20:16 -0800
Subject: Watch log
Message-ID: <1168892415.324184.273210@l53g2000cwa.googlegroups.com>

Hi guys,
I've an application that writes a log file.
I need to write an application with python that will read this file.

I would like wait until a new line will be write in the file.

Something like the "watch cat Log" command on Linux os.

How can I check the eof and restart the reading?



From wolf_tracks at invalid.com  Wed Jan 24 15:57:03 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Wed, 24 Jan 2007 20:57:03 GMT
Subject: Beginners Tutorial in PDF Format?
In-Reply-To: <mailman.2971.1169427468.32031.python-list@python.org>
References: <_6Qsh.51414$wc5.5373@newssvr25.news.prodigy.net><1169415358.277431.130640@s34g2000cwa.googlegroups.com>	<FJTsh.36658$Gr2.32367@newssvr21.news.prodigy.net>
	<mailman.2971.1169427468.32031.python-list@python.org>
Message-ID: <zKPth.66058$qO4.61284@newssvr13.news.prodigy.net>

Gabriel Genellina wrote:
> "W. Watson" <wolf_tracks at invalid.com> escribi? en el mensaje 
> news:FJTsh.36658$Gr2.32367 at newssvr21.news.prodigy.net...
> Robert Hicks wrote:
>> W. Watson wrote:
>>> I'd like to print a tutorial in one fell swoop, but it seems most on the
>>> various sites are page by page embedded descriptions in the page. Any
>>> available as a pdf?
>>
>> http://docs.python.org/download.html
>>
>> http://www.diveintopython.org/
>>
>> Thanks, but the first url takes me to a web page that contains the 
>> complete
>> tutorial. Does choosing pdf (USA) in the table download a file that 
>> contains
>> all the documents on the list below and to the left?
> 
> Try again. The first url goes to this page:
> Download Python 2.5 Documentation (19 September 2006): To download an 
> archive containing all the documents for this version of Python in one 
> of various formats [pdf included, you can choose between Letter/A4].
> Below, it says "These documents are not available for download 
> individually."
> 
There is nothing there with the title "Python 2.5 Documentation".


          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

          "Depend upon it, there is nothing so unnatural as the
           commonplace." -- Sherlock Holmes, in "A Case of Identity"
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From tgrav at mac.com  Tue Jan 23 11:54:46 2007
From: tgrav at mac.com (Tommy Grav)
Date: Tue, 23 Jan 2007 11:54:46 -0500
Subject: Reading character from keyboard
Message-ID: <9936C600-45F0-4A0F-96CE-31A298DFC0DF@mac.com>

A very simple question. I would like to read a single character from the
keyboard (y or n). I have tried to look in my Python books and a google
search, but have come up empty. I am sure the info s out there, but I
guess I am unable to find the right question or search keyword :o/

Any hints or help appreciated
    Cheers
       Tommy


From george.sakkis at gmail.com  Thu Jan 11 12:19:30 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 11 Jan 2007 09:19:30 -0800
Subject: Fixed keys() mapping
Message-ID: <1168535970.585977.317760@p59g2000hsd.googlegroups.com>

I wrote an 'fkdict' dict-like class for mappings with a fixed set of
keys but I'm wondering if there's a simpler way to go about it.

First off, the main motivation for it is to save memory in case of many
dicts with the same keys, for example when reading from a
csv.DictReader or constructing dicts out of rows fetched from a
database. For example, test_mem(dict) takes up around 246 MB according
to the Windows task manager while test_mem(fkdict) takes around 49 MB:

def test_mem(maptype):
    d = [(i,str(i)) for i in range(1000)]
    ds = [maptype(d) for i in xrange(10000)]
    raw_input('finished')

An additional benefit is predictable ordering (e.g.
fkdict.fromkeys('abcd').keys() == list('abcd')), like several
ordered-dict recipes.

The implementation I came up with goes like this: each fkdict instance
stores only the values as a list in self._values. The keys and the
mapping of keys to indices are stored in a dynamically generated
subclass of fkdict, so that self._keys and self._key2index are also
accessible from the instance. The dynamically generated subclasses are
cached so that the second time an fkdict with the same keys is created,
the cached class is called.

Since the keys are determined in fkdict.__init__(), this scheme
requires changing self.__class__ to the dynamically generated subclass.
As much as I appreciate Python's dynamic nature, I am not particularly
comfortable with objects that change their class and the implications
this may have in the future (e.g. how well does this play with
inheritance). Is this a valid use case for type-changing behavior or is
there a better, more "mainstream" OO design pattern for this ? I can
post the relevant code if necessary.

George



From mr.galien at gmail.com  Tue Jan 23 06:05:53 2007
From: mr.galien at gmail.com (Sang Kim)
Date: Tue, 23 Jan 2007 20:05:53 +0900
Subject: Try to porting Python2.5 to Zaurus
Message-ID: <40bc31da0701230305p350a30b9p86dc6c8bcb317ffb@mail.gmail.com>

Glad to see another Zaurus lovin' Pythonite.

;-)

and also thanks to you....
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070123/0da587e8/attachment.html>

From tarique2006 at aol.com  Mon Jan  8 10:39:10 2007
From: tarique2006 at aol.com (Tarique)
Date: Mon, 08 Jan 2007 21:09:10 +0530
Subject: Books,resources..
Message-ID: <entoit$d5b$1@aioe.org>

Hi all!
i am new to this group and starting out with python as well.i have
programming experience in 'c'
so can you please suggest some standard references for python
considering that i have some programming experience (though c is quite
unrelated i guess)


From __peter__ at web.de  Mon Jan  8 03:42:34 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 08 Jan 2007 09:42:34 +0100
Subject: how to find the longst element list of lists
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
	<m2mz4ul1tk.fsf@unique.fqdn> <45a1b4da$1@nntp0.pdx.net>
Message-ID: <ent063$8at$01$1@news.t-online.com>

Scott David Daniels wrote:

> Dan Sommers wrote:
>> ...
>>     longest_list, longest_length = list_of_lists[ 0 ], len( longest_list
>>     ) for a_list in list_of_lists[ 1 : ]:
>>         a_length = len( a_list )
>>         if a_length > longest_length:
>>             longest_list, longest_length = a_list, a_length
>> will run faster than sorting the list just to pick off one element (O(n)
>> vs. O(n log n) for all of you Big-Oh notation fans out there; you know
>> who you are!).
> 
> Or, more succinctly, after:
>      list_of_lists = [["q", "e", "d"],
>                       ["a", "b"],
>                       ["a", "b", "c", "d"]]
> You can find the longest with:
>      maxlength, maxlist = max((len(lst), lst) for lst in list_of_lists)
> or (for those pre-2.5 people):

pre-2.4 

>      maxlength, maxlist = max([(len(lst), lst) for lst in list_of_lists])

With the caveat that if there are lists of equal length their items will be
compared:

>>> max((len(lst), lst) for lst in [[1], [1j]])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: no ordering relation is defined for complex numbers

So if you want the first out of the lists with equal length on a python
where Steve's enhancement is not yet available (pre-2.5):

>>> max_len, dummy, max_list = max((len(lst), -i, lst) for i, lst in
enumerate([[1], [1j]]))
>>> max_len, max_list
(1, [1])

Peter


From nono at hotmail.com  Mon Jan  1 12:38:14 2007
From: nono at hotmail.com (Osiris)
Date: Mon, 01 Jan 2007 18:38:14 +0100
Subject: BOOST again: how to proceed from here....
Message-ID: <enhip2hvqv40mfve7q1cv2c0d7vd5d6dqd@4ax.com>

I'm trying to work with Boost, trying to use my C-code from Python..
So now I have generated a C_test2.dll and a C_test2.lib with Visual
C++ 2005, from code like this:
===============
#include <stdlib.h>
#include <stdafx.h>

namespace { // Avoid cluttering the global namespace.

int my_int;   /* a global integer: or outside namespace ? */
 double calc ( double f)
 {
    my_int = (int) (f/2);
 //   printf( "Half of %f is %d\n", f, my_int ); 
    return f/2;
 }
 
}

#include <boost/python.hpp>

using namespace boost::python;

BOOST_PYTHON_MODULE( half )
{
    def("calc", calc ); 
}
=====================

Now I want to use calc from Python.
I have my Python in c:\python24\ (IDLE system, version 2.4.4)
Where do I put the dll and lib ?

in c:\python24\libs and c:\python24\DLLs ?

and do I import like:
import C_test2.dll 
?
because now I get this:

Traceback (most recent call last):
  File "<pyshell#1>", line 1, in -toplevel-
    import C_test2.dll
ImportError: DLL load failed: The specified module could not be found.


From martin at v.loewis.de  Sun Jan  7 19:16:40 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 08 Jan 2007 01:16:40 +0100
Subject: (newbie) Is there a way to prevent "name redundancy" in OOP ?
In-Reply-To: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
References: <72c2a$459ea268$d443bb3a$20196@news.speedlinq.nl>
Message-ID: <45A18D68.5020308@v.loewis.de>

Stef Mientki schrieb:
> Can this be achieved without redundancy ?

You can use the registry design to use the object's name also to find
the object. In the most simple way, this is

registry = {}

class pin:
  def __init__(self, name):
    registry[name] = self
    self.name = name

pin('aap')
print registry['aap']

Using computed attribute names, you can reduce typing on attribute
access:

class Registry: pass
registry = Registry()


class pin:
  def __init__(self, name):
    setattr(registry, name, self)
    self.name = name

pin('aap')
print registry.aap

If you want to, you can combine this with the factory/singleton
patterns, to transparently create the objects on first access:

class Registry:
  def __getitem__(self, name):
    # only invoked when attribute is not set
    r = pin(name)
    setattr(self, name, r)
    return r
registry = Registry()

class pin:
  def __init__(self, name):
    self.name = name

print registry.aap

HTH,
Martin


From Barry.Carroll at psc.com  Fri Jan  5 19:27:04 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Fri, 5 Jan 2007 16:27:04 -0800
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A64@eugsrv400.psc.pscnet.com>

Greetings:

Please forgive me if this is the wrong place for this post.  I couldn't find a more acceptable forum.  If there is one, please point me in the right direction.  

I am part of a small team writing a table-driven automated testing framework for embedded software.  The tables, which contain rows of keywords and data that drive the testing, are stored as plain-text "Comma-Separated Value" or .csv files.  Each table can call other tables, which means that multiple files may be open at a time.  

The framework includes a Parser class.  The program takes the name of the top-level table as a parameter, creates an instance of the Parser and passes the table name to it.  The Parser instance opens the .csv file with that name, reads each line of the file (row of the table) and takes the appropriate action.  When it encounters a row referencing another table, it creates a new Parser instance and passes it the name of the new table, suspending its own operation until the new Parser instance completes.  

In this way, a tree of Parser instances is created, each with a single open file object.  (BTW, recursive and circular references are not allowed.)  When each Parser instance comes to the end of its table, the instance is explicitly destroyed, presumably destroying any objects it holds, AND closing its open file.  

Because of the nature of the framework and the testing we do, this Parser tree never gets very tall: four or five levels at the most.  The same table may be invoked dozens or hundreds of times, however, with different sets of data each time.  

This is where things go wrong.  After about 500 table invocations, the framework starts refusing to process any more tables, responding with the following error:

	[Errno 24] Too many open files: 'HostCommandDevNotReady.csv'

We can correct the behavior by explicitly closing each Parser's table file object before exiting the Parser code.  This indicates that Python is failing to free up some file-related internal resource when the Parser object is destroyed.  This behavior occurs on Python 2.3 and 2.4 for Windows, but not on Python 2.3 for Linux, and not on the Windows version of Python2.5.  

This is why I didn't just post a report to Bug Tracker: the problem seems to have been fixed.  I did search through the archive of Windows related bugs, but found no mention of this type of a bug.  What I want to know is:

	* has anyone else encountered a problem like this,
	* how was the problem corrected,
	* can the fix be retro-fitted to 2.5 and 2.4?

Thanks in advance for any information you can provide.  

Regards,
?
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.
-Quarry worker's creed




From no-spam at no-spam-no-spam.invalid  Wed Jan  3 14:55:53 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 03 Jan 2007 20:55:53 +0100
Subject: A python library to convert RTF into PDF ?
In-Reply-To: <1167846487.943390.192130@a3g2000cwd.googlegroups.com>
References: <1167846487.943390.192130@a3g2000cwd.googlegroups.com>
Message-ID: <enh1oa$9nq$1@news.albasani.net>

leonel.gayard at gmail.com wrote:
> Hi,
> 
> Does anyone know a good python library to convert a RTF file into PDF ?
> 
> This should be done automaticaly: I have a web page that takes some
> values and inserts them into a RTF template, resulting in an RTF file.
> However, I cannot send the output back to the user in RTF, it must be
> sent in PDF instead, so I need to convert the result.
> 
> So, what library can I use to convert from RTF to PDF ? GPL / BSD
> Libraries are welcome.
> 

Don't know a mere self-contained job.

But probably then you are on a Windows - print the RTF through Word (win32com/ctypes) or through a RichEdit control into a .ps  then convert via ghostscript/ps2pdf into a pdf.  (gs obviously doesn't know RTF by default or at all...)


Robert


From http  Wed Jan 17 16:46:29 2007
From: http (Paul Rubin)
Date: 17 Jan 2007 13:46:29 -0800
Subject: Units of measurement
Message-ID: <7x8xg1xr62.fsf_-_@ruckus.brouhaha.com>

I'm sure this has been done before, but it just struck my fancy, an
example of Python's "emulating numeric types", inspired by the old
Unix "units" utility, and the Frink language.  The language reference
for these features is somewhat unclear and I'll enter some sourceforge
items.  Maybe I'll write a calculator-with-units around it.  If I were
really industrious, I'd attempt a Frink-like interpreter, but don't
hold your breath.

================================================================

try:
    set
except NameError:
    from sets import Set as set   # python 2.3 ...

class Unit:
    def __init__(self, coef, dimensions):
        self.dimensions = dimensions
        self.coef = coef
    def __add__(self, other):
        if self.dimensions != other.dimensions:
            raise TypeError, ('dimension mismatch', self, other)
        return Unit(self.coef + other.coef, self.dimensions)
    def __sub__(self,other):
        return self + (-1.0) * other
    def __rmul__(self, x):
        return x*self
    def __rdiv__(self, x):
        return x/self
    def __mul__(self, other):
        pc = self.coef * other.coef
        sd, od = self.dimensions, other.dimensions
        basis = set(sd.keys()) | set(od.keys())
        pa = [(d, sd.get(d,0)+od.get(d,0)) for d in basis]
        pd = dict([(d,a) for d,a in pa if a != 0])
        return Unit(pc, pd)
    def __repr__(self):
        a = [repr(self.coef)]
        for d,c in self.dimensions.iteritems():
            s = str(d)
            if c != 1: s += '^'+str(c)
            a.append(s)
        return '*'.join(a)
    def __div__(self, other):
        od = other.dimensions
        inv = Unit(1.0 / other.coef,
                   dict([(d, -od[d]) for d in od]))
        return self * inv
    def __pow__(self, n):
        n = n.coef
        if self.dimensions and type(n) not in (int,long):
            raise TypeError, ('exponent must be integer', self,n)
        cn = self.coef ** n
        sd = self.dimensions
        return Unit(self.coef ** n,
                    dict([(d,sd[d]*n) for d in sd]))

    def __coerce__(self, other):
        if isinstance(other, Unit): return self, other
        return self, Unit(other, {})

    def __float__(self):
        if self.dimensions:
            raise TypeError, ('unit must be dimensionless for float cast', self)
        return float(self.coef)
    def __int__(self):
        return int(float(self))

def base_unit(name):
    return Unit(1.0, {name : 1})

meter = base_unit('m')
second = base_unit('s')
kg = base_unit('kg')
coulomb = base_unit('coulomb')

centimeter = meter / 100
inch = 2.54 * centimeter
foot = ft = 12 * inch
mile = 5280*foot
minute=60*second
hour=60*minute
speed_limit = 55 * mile / hour
furlong = mile / 8
day = 24 * hour
fortnight = 14 * day
# could include more units but you get the idea

c = 186282*mile/second
print 'speed of light =', c/(furlong/fortnight), 'furlongs per fortnight'
# ...


From tubby at bandaheart.com  Thu Jan 25 16:54:15 2007
From: tubby at bandaheart.com (tubby)
Date: Thu, 25 Jan 2007 16:54:15 -0500
Subject: pdf to text
In-Reply-To: <86714$45b9254c$54d1d767$3741@news.chello.no>
References: <epb638$gd4$1@solaris.cc.vt.edu>
	<86714$45b9254c$54d1d767$3741@news.chello.no>
Message-ID: <epb8v8$lt1$1@solaris.cc.vt.edu>

David Boddie wrote:
> The pdftotext tool may do what you want:
> 
>   http://www.foolabs.com/xpdf/download.html
> 
> Let us know how you get on with it.

I have used this tool. However, I need PDF read ability on Windows and 
Linux and in the future Macs. pdftotext works great on Linux, but poorly 
on Windows (100% sustained CPU usage, etc).

Thank you for the suggestion. I'll keep hammering away at a simple 
Python solution to this. Over the years, I have come to loath Adobe's 
Portable Document Format!


From martin at v.loewis.de  Thu Jan  4 03:28:56 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 04 Jan 2007 09:28:56 +0100
Subject: When argparse will be in the python standard installation
In-Reply-To: <H-ydneqpW-axgAHYnZ2dnUVZ_qWvnZ2d@comcast.com>
References: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>
	<459C008D.5040404@v.loewis.de>
	<H-ydneqpW-axgAHYnZ2dnUVZ_qWvnZ2d@comcast.com>
Message-ID: <459CBAC8.9060007@v.loewis.de>

Steven Bethard schrieb:
> If someone has an idea how to include argparse features into optparse,
> I'm certainly all for it. But I tried and failed to do this myself, so I
> don't know how to go about it.

It's not necessary that the implementation is retained, only that the
interface is preserved. So if you can come up with an implementation
that supports all optparse applications, and adds the additional
features, your implementation could replace the current optparse.
If you need to make incompatible changes, it would be best if you
could produce a list of such changes, so that optparse users can
review them to find out whether they are affected.

Regards,
Martin


From larry.bates at websafe.com  Thu Jan 11 18:33:17 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 11 Jan 2007 17:33:17 -0600
Subject: Newbie question: SMTP -> SQL Server
In-Reply-To: <mailman.2585.1168533856.32031.python-list@python.org>
References: <1168529572.873867.207730@k58g2000hse.googlegroups.com>	<j0tph.33102$X97.7130@newsfe18.lga>	<1168531934.015865.177100@i56g2000hsf.googlegroups.com>
	<mailman.2585.1168533856.32031.python-list@python.org>
Message-ID: <45A6C93D.4060605@websafe.com>

Steve Holden wrote:
> jrpfinch wrote:
>> Thank you.  I have just realised I completely misunderstand how SMTP
>> servers work.  From what I can tell, when you run the cookbook script
>> it listens locally on port 8025.
>>
>> You then have to configure a Linux (in my case) account with a username
>> and password so my external piece of software (on another Windows
>> machine) can log in and use the SMTP server.
>>
>> Then I write the some code in the cookbook example to redirect any mail
>> content to the MS SQL server database.
>>
>> Note that the external piece of software can only talk SMTP - this is
>> why I am having to develop this script.
>>
>> Does this sound sensible?  Any tips on how to configure my Linux box (I
>> don't have much experience with Linux either)?
>>
>> Many thanks
>>
>> Jon
>>
> Presumably you can configure the external piece of software at least to
> the extent of setting the email address it delivers to?
> 
> In that case it will be *much* simpler to set up an account on a mail
> server to receive these emails. That way the server will be available
> whenever the SMTP-based sender wants or needs to send mail, and you can
> use Python to collect the emails in batched using the POP protocol, as a
> client.
> 
> Once you receive the email messages then yes, it's perfectly practical
> to save the content in a SQL server database. mxODBC is one possible
> driver package (though it requires you to purchase a license for
> commercial use), and I seem to remember there's another one called
> adodbapi that is open source. There are almost certainly others, but
> it's a while since I used SQL Server with Python.
> 
> regards
>  Steve

Good advice.

BTW-You can use dbi and odbc modules to work with SQL server without
purchasing anything.


From http  Tue Jan  2 10:37:19 2007
From: http (Paul Rubin)
Date: 02 Jan 2007 07:37:19 -0800
Subject: Newbie query about secure embedded python
References: <mailman.2203.1167749297.32031.python-list@python.org>
Message-ID: <7xbqlhh234.fsf@ruckus.brouhaha.com>

Richard Dwan <richardmartindwan at yahoo.co.uk> writes:
> My question is; is there a secure python interpreter
> that prevents malicious code from using C/C++ modules
> or built-in functions from causing damage to a users
> system.

You mean like a java sandbox?  There used to be one in Python (the
rexec/Bastion modules) but they were removed for security reasons
(i.e. they weren't secure and there was no way to fix the holes).
There seems to currently be no really reliable way to do what you're
asking.  Your best bet may be either a small JVM, or a very limited
special purpose language that you could implement in Python.


From massimo.scamarcia at gmail.com  Wed Jan 31 04:24:27 2007
From: massimo.scamarcia at gmail.com (skam)
Date: 31 Jan 2007 01:24:27 -0800
Subject: data design
In-Reply-To: <1170183985.871094.155720@q2g2000cwa.googlegroups.com>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
	<1170183985.871094.155720@q2g2000cwa.googlegroups.com>
Message-ID: <1170235467.666502.270250@l53g2000cwa.googlegroups.com>

On Jan 30, 8:06 pm, "Paddy" <paddy3... at netscape.net> wrote:
>
> Google for YAML and JSON formats too
>

YAML and JSON are good when used as data-interchange format, not as
configuration files.
These formats are too complex for non-programmers, so they will ask
aid for every editing ;)

I suggest ini-like files, parsed using ConfigParser, but you should
have a look to ConfigObj that has got automatic type conversion and
other interesting features



From buzzard at urubu.freeserve.co.uk  Mon Jan 15 22:57:14 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Tue, 16 Jan 2007 03:57:14 +0000
Subject: Python web app. (advice sought)
In-Reply-To: <45aae51b.0@entanet>
References: <45aae51b.0@entanet>
Message-ID: <45ac5225.0@entanet>

Thanks all.  It's looking like Turbogears at the moment (unless my boss
makes an executive decision).  Cheers.

Duncan


From gagsl-py at yahoo.com.ar  Thu Jan 25 00:35:46 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 25 Jan 2007 02:35:46 -0300
Subject: Using Timing function problem.....
In-Reply-To: <1169699160.119721.9750@v45g2000cwv.googlegroups.com>
References: <1169699160.119721.9750@v45g2000cwv.googlegroups.com>
Message-ID: <7.0.1.0.0.20070125023344.04521b08@yahoo.com.ar>

At Thursday 25/1/2007 01:26, kevin wrote:

>Hi... I'm having a few problems here...
>I want to input in my function different values and then time each one
>to see how long it took to run the function... so right now it doesn't
>like the "i" inside my function fibonacci(i)  but if I put a constant
>it's fine....

You have to build the right *string* to be evaluated...

>for i in (range(1,30)):
>         mytime1 = timeit.Timer( 'fibonacci(i)', 'from prl1 import
>fibonacci' )

for i in (range(1,30)):
         mytime1 = timeit.Timer( 'fibonacci(%d)' % i, 'from prl1 
import fibonacci' )


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From nanjundi at gmail.com  Mon Jan 22 20:16:35 2007
From: nanjundi at gmail.com (Nanjundi)
Date: 22 Jan 2007 17:16:35 -0800
Subject: Getting to an SSH account over a HTTP proxy
In-Reply-To: <mailman.2985.1169469575.32031.python-list@python.org>
References: <mailman.2985.1169469575.32031.python-list@python.org>
Message-ID: <1169514995.916358.17030@11g2000cwr.googlegroups.com>


BJ?rn Lindqvist wrote:
> I want to use Python to connect to a SSH account over a HTTP proxy to
> automate some operations. I thought paramiko would be able to do that,
> but it can not (it seems).
>
> Is there some other Python module that can do what I want?
>
> --
> mvh Bj?rn

Did you take a look at twisted library?
twistedmatrix.com
http://twistedmatrix.com/projects/core/documentation/howto/clients.html


I haven't tried to connect over port 80, but its worth a try.

-N



From gagsl-py at yahoo.com.ar  Fri Jan 26 02:57:17 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 26 Jan 2007 04:57:17 -0300
Subject: Prefered install method?
In-Reply-To: <GuadndfwVf7pMCTYRVnzvA@telenor.com>
References: <GuadndfwVf7pMCTYRVnzvA@telenor.com>
Message-ID: <7.0.1.0.0.20070126044434.044f1bf8@yahoo.com.ar>

At Friday 26/1/2007 04:27, Tina I wrote:

>So my question is; What is the preferred/ common way to install a python
>application so it's not really distro specific? And are there any good
>resources on this on the web?

distutils, included in the standard Python library. You surely have 
the docs installed, anyway you can read it online at 
http://docs.python.org/dist/dist.html

For the simplest case (your app only contains python modules) just 
write a setup.py file on the top directory of you application:

from distutils.core import setup
setup(name='appname',
     version='1.0',
     py_modules=['foo', 'bar'],
     )

and execute: python setup.py sdist


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From pierre at saiph.com  Tue Jan 30 10:52:43 2007
From: pierre at saiph.com (Imbaud Pierre)
Date: Tue, 30 Jan 2007 16:52:43 +0100
Subject: data design
In-Reply-To: <45BF5CC5.5060306@websafe.com>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
	<45BF5CC5.5060306@websafe.com>
Message-ID: <45bf69cb$0$31452$426a74cc@news.free.fr>

Larry Bates a ?crit :
> Imbaud Pierre wrote:
> 
>>The applications I write are made of, lets say, algorithms and data.
>>I mean constant data, dicts, tables, etc: to keep algorithms simple,
>>describe what is peculiar, data dependent, as data rather than "case
>>statements". These could be called configuration data.
>>
>>The lazy way to do this: have modules that initialize bunches of
>>objects, attributes holding the data: the object is somehow the row of
>>the "table", attribute names being the column. This is the way I
>>proceeded up to now.
>>Data input this way are almost "configuration data", with 2 big
>>drawbacks:
>> - Only a python programmer can fix the file: this cant be called a
>>   configuration file.
>> - Even for the author, these data aint easy to maintain.
>>
>>I feel pretty much ready to change this:
>>- make these data true text data, easier to read and fix.
>>- write the module that will make python objects out of these data:
>>the extra cost should yield ease of use.
>>
>>2 questions arise:
>>- which kind of text data?
>>    - csv: ok for simple attributes, not easy for lists or complex
>>    data.
>>    - xml: the form wont be easier to read than python code,
>>      but an xml editor could be used, and a formal description
>>      of what is expected can be used.
>>- how can I make the data-to-object transformation both easy, and able
>>  to spot errors in text data?
>>
>>Last, but not least: is there a python lib implementing at least part
>>of this dream?
> 
> 
> Use the configurations module.  It was built to provide a way to parse
> configuration files that provide configuration data to program.  It is
> VERY fast so the overhead to parse even thousands of lines of config
> data is extremely small.  I use it a LOT and it is very flexible and
> the format of the files is easy for users/programmers to work with.
> 
> -Larry Bates
U mean configParser? Otherwise be more specific (if U dont mind...)


From sturlamolden at yahoo.no  Fri Jan 19 08:40:12 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 19 Jan 2007 05:40:12 -0800
Subject: how to mimik a main() function to start a program with entry
	point?
In-Reply-To: <mailman.2897.1169213439.32031.python-list@python.org>
References: <mailman.2897.1169213439.32031.python-list@python.org>
Message-ID: <1169214012.583356.193160@v45g2000cwv.googlegroups.com>


krishnakant Mane wrote:

> I have a set of modules in my package and out if which one is my
> actual starting point to my entire program.  say for example I have an
> entire database application ready and I want a main (as in java or c)
> to initiate the program and may be bring up a login screen and then
> pass the control on to the main window.
> if I am giving raw source code that is easy because I will tell user
> to run the command ./xyz.py which has that function.
> but if I freze it into an executable with py2exe for example , how do
> I solve this problem?


If you cannot figure that out, you should not selling software.

if __name__ == '__main__':
  #whatever



From nogradi at gmail.com  Tue Jan 16 03:37:48 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Tue, 16 Jan 2007 09:37:48 +0100
Subject: installing/maintaining modules for multiple versions of python
In-Reply-To: <1168924613.732835.83570@l53g2000cwa.googlegroups.com>
References: <1168924613.732835.83570@l53g2000cwa.googlegroups.com>
Message-ID: <5f56302b0701160037n66e849a2kd7cbae5c9be75570@mail.gmail.com>

> I have a suse box that has by default python 2.4 running and I have a
> 2.5 version installed
> in /reg/python2.5. How do I install new modules for only 2.5 without
> disturbing the 2.4 default
> installation.

If you do 'python2.5 setup.py install' on a new module supporting
distutils it will only effect the 2.5 installation. If the new module
has no setup.py you can just copy it to /reg/python2.5/site-packages
and it will also only effect the 2.5 installation.

HTH.


From me at privacy.net  Mon Jan  1 22:13:31 2007
From: me at privacy.net (Dan Sommers)
Date: Mon, 01 Jan 2007 22:13:31 -0500
Subject: OO question
References: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
	<1167639280.181587.242490@s34g2000cwa.googlegroups.com>
	<1167700159.792649.61210@a3g2000cwd.googlegroups.com>
Message-ID: <m24praqfxg.fsf@unique.fqdn>

On 1 Jan 2007 17:09:19 -0800,
fejkadress at hushmail.com wrote:

> Lets say I have those two classes, Person and Address. How would one
> implement the relationship between them? First, a Person can have one
> or more addresses (or none), that could be represented as a list of
> Addresses, right? But then, if I have an Address I want to see which
> persons who live there, then I would have a list of Persons in each
> Address.

> Is this doubly-linked way of doing it a good way of doing it, or is
> there a better "OO way" I haven't learned yet?

I don't know about "a better OO" way, but one way is to model the
various relationships as a list of (person, address) pairs:

    persons = [ Person( ), Person( ), Person( ) ]
    addresses = [ Address( ), Address( ), Address( ), Address( ) ]

    livesat = ((person[ 1 ], address[ 1 ]),
               (person[ 2 ], address[ 1 ]),
               (person[ 2 ], address[ 2 ]))

    worksat = ((person[ 1 ], address[ 3 ]),
               (person[ 2 ], address[ 4 ]))

Then the list of people who live at address[ 1 ] is:

    [ (person, address) for (p, a) in livesat if a is address[ 1 ] ]

But what about all the various relationships (lives at, works at, is
known to have vandalized, etc.)?

    livesat = Relationship( "lives at" )
    worksat = Relationship( "works at" )
    vandalized = Relationship( "vandalized" )

    information = ((person[ 1 ], address[ 1 ], livesat),
                   (person[ 2 ], address[ 1 ], livesat),
                   (person[ 2 ], address[ 2 ], livesat),
                   (person[ 1 ], address[ 3 ], worksat),
                   (person[ 2 ], address[ 4 ], worksat),
                   (person[ 1 ], address[ 4 ], vandalized))

Now the list of people who live at address[ 1 ] is:

    [ (person, address) for (p, a, r) in information
      if a is address[ 1 ] and r is livesat ]

(There are other ways, too, such as capturing one person and one address
right inside a Relationship; someone with a more comp-sci-theoretical
background than I have can probably tell you why or when one way might
be better than the other.)

The definitions of Person, Address, and Relationship, as well as the
user-interface(s) and the persistent storage mechanism(s), are left as
exercises to the interested reader.  ;-)

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
"I wish people would die in alphabetical order." -- My wife, the genealogist


From duncan.booth at invalid.invalid  Mon Jan 15 03:47:22 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 15 Jan 2007 08:47:22 GMT
Subject: How naive is Python?
References: <huCqh.1309$O02.170@newssvr11.news.prodigy.net>
	<pan.2007.01.15.04.17.58.757581@REMOVEME.cybersource.com.au>
Message-ID: <Xns98B95964DEDADduncanbooth@127.0.0.1>

Roy Smith <roy at panix.com> wrote:

> All of those just move around pointers to the same (interned) string.

Correct about the pointers, but the string is not interned:

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> wrote:

>>>> s1 = foo()
>>>> s2 = foo()
>>>> s1 == s2, s1 is s2
> (True, True)
> 
> So the string "This is a test" within foo is not copied each time the
> function is called. However, the string "This is a test" is duplicated
> between foo and foo2 (the two functions don't share the same string
> instance):
> 
>>>> s3 = foo2()
>>>> s3 == s1, s3 is s1
> (True, False)
> 

In this specific example the two functions don't share the same string, but 
that won't always be the case: if the string had been interned this would 
have printed (True, True).

e.g. Removing all the spaces from the string produces a string which is 
interned.

>>> def foo():
    s = "Thisisatest"
    return s

>>> def foo2():
    return "Thisisatest"

>>> s1 = foo()
>>> s2 = foo2()
>>> s1 is s2
True

Bottom line, never make assumptions about when two literal strings will 
share the same object and when they won't.


From paul at eventuallyanyway.com  Sat Jan 27 01:03:07 2007
From: paul at eventuallyanyway.com (Paul Hummer)
Date: Sat, 27 Jan 2007 06:03:07 +0000
Subject: help with subscription to a process
In-Reply-To: <1169866318.333371.238530@a34g2000cwb.googlegroups.com>
References: <1169866318.333371.238530@a34g2000cwb.googlegroups.com>
Message-ID: <45BAEB1B.5040801@eventuallyanyway.com>

The Python socket module, although lightweight, can be used to quickly
establish a socket between client and server for the purpose of feeding
data.  I've done this once or twice with XML.  If you are looking for
something a bit more robust, might I suggest reading up on the Twisted
libraries?

Paul

elrondrules at gmail.com wrote:
> Hi
>
> I am new to python and hence need some help
>
> i have a process A that posts events as XML docs.
> I need to create a listener to this process that subscribes to the
> process A and as and when a XML doc is posted parse it.
> I have creted an interface where if I specify the port number on which
> the listener is running the process A will automatically start posting
> events.
>
> The place I need help is to create a listener and a way of parsing the
> XML docs. If you can give me some starting points or docs/resources
> that will be great..
>
> Thanks
>
>   



From Thomas.Ploch at gmx.net  Fri Jan  5 12:55:03 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Fri, 05 Jan 2007 18:55:03 +0100
Subject: Dividing integers...Convert to float first?
In-Reply-To: <12pt3f3kc1jmcf8@corp.supernews.com>
References: <1168017342.255981.134400@11g2000cwr.googlegroups.com>	<459E8B5C.6020804@gmx.net>	<mailman.2336.1168018559.32031.python-list@python.org>
	<12pt3f3kc1jmcf8@corp.supernews.com>
Message-ID: <459E90F7.6080209@gmx.net>

Grant Edwards schrieb:
> On 2007-01-05, Jonathan Smith <smithj at rpath.com> wrote:
> 
>>>>> from __future__ import division
>>>>> 1/2
>> 0.5
> 
>    $ python
>    Python 2.4.3 (#1, Dec 10 2006, 22:09:09) 
>    [GCC 3.4.6 (Gentoo 3.4.6-r1, ssp-3.4.5-1.0, pie-8.7.9)] on linux2
>    Type "help", "copyright", "credits" or "license" for more
>    information.
>    >>> from __future__ import LotteryNumbers
>      File "<stdin>", line 1
>    SyntaxError: future feature LotteryNumbers is not defined
>    >>> 
> 
> Damn.  
> 
> I guess it's back to work then.
> 

You are working as an oracle?

:-)

Thomas


From richardmartindwan at yahoo.co.uk  Tue Jan  2 09:41:34 2007
From: richardmartindwan at yahoo.co.uk (Richard Dwan)
Date: Tue, 2 Jan 2007 14:41:34 +0000 (GMT)
Subject: Newbie query about secure embedded python
Message-ID: <20070102144134.11373.qmail@web27612.mail.ukl.yahoo.com>

(Originally incorrectly posted to C++ SIG mailing
list)

Hello,

First let me apologise if this question is obvious -
I've never embedded python before and I am deciding of
it meets my needs.



My question is; is there a secure python interpreter
that prevents malicious code from using C/C++ modules
or built-in functions from causing damage to a users
system.


My objective is to have an embedded interpreted
language to drive all non CPU intensive application
behaviour with user / downloadable scripts to
customise the UI / scripting processing.

My concern with a simply embedding python is that this
would give arbitrary scripts the ability to make
system level changes (e.g. destructive abilities using
file access).  As I wish to encourage scripts to be
shared across the Internet this could not be
tolerated.

Python provides a very good script language to which I
can expose application specific functions/objects
using the already documented methods.  To use Python
with the above security restrictions I would need to
be able to disable all file / system built-ins when
running the interpreter across user scripts. In
addition, importing C/C++ functions would have to be
disabled as well.  As a complication, a set of
'approved C/C++ functions' such as numpy would need to
be supported in order to allow the user to do 'useful
processing' within the scripts driving the
application.

My naive solution would be to customise the
'PyImport_Import' and 'PyObject_CallObject' routines
used with user scripts so that:
--- an imported C/C++ module would be checked against
an approved list to prevent arbitrary C/C++ code from
being executed
--- built-in function calls would be checked against
an approved list to prevent system damaging calls from
being made
--- the application API that is exposed to the user
code must not expose to scripts a way of damaging
anything more than the data currently being
'processed'
--- the application would have to ensure that user
code is only executed within the secure interpreter
scope (e.g. not use callbacks to user script code
outside the secure interpreter)

Has the necessary secure python interpreter already
been created / a work in progress?



Many thanks for any advice you can give me,
Richard

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From goodepic at gmail.com  Thu Jan  4 16:37:50 2007
From: goodepic at gmail.com (goodepic)
Date: 4 Jan 2007 13:37:50 -0800
Subject: Problem Running Working Code on Mac
In-Reply-To: <1167946511.531632.41750@11g2000cwr.googlegroups.com>
References: <1167946511.531632.41750@11g2000cwr.googlegroups.com>
Message-ID: <1167946670.792574.151620@q40g2000cwq.googlegroups.com>

Also, if it makes a difference, the lines quoted in the error message
were actually written automatically by wxGlade.



From __peter__ at web.de  Wed Jan 31 11:00:43 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 31 Jan 2007 17:00:43 +0100
Subject: Regex with ASCII and non-ASCII chars
References: <1170243969.504255.134100@v33g2000cwv.googlegroups.com>
	<epq6k8$po8$01$1@news.t-online.com>
	<1170257547.041535.20770@a75g2000cwd.googlegroups.com>
Message-ID: <epqee8$l9e$00$1@news.t-online.com>

TOXiC wrote:

> Thx it work perfectly.
> If I want to query a file stream?
> 
>     file = open(fileName, "r")
>     text = file.read()
>     file.close()

Convert the bytes read from the file to unicode. For that you have to know
the encoding, e. g.

      file_encoding = "utf-8" # replace with the actual encoding
      text = text.decode(file_encoding)

>     regex = re.compile(u"(???????)", re.IGNORECASE)
>     match = regex.search(text)
>     if (match):
>         result = match.group()
>         print result
>         WritePatch(fileName,text,result)
>     else:
>         result = "No match found"
>         print result
> 
> It return "no match found" (the file contain the string "???????"
> but...).
> Thanks in advance for the help!

Peter


From nachogomez at gmail.com  Fri Jan 26 22:05:59 2007
From: nachogomez at gmail.com (=?UTF-8?Q?Ra=C3=BAl_G=C3=B3mez_C.?=)
Date: Fri, 26 Jan 2007 23:05:59 -0400
Subject: Getting the output from a console command while it's been generated!
Message-ID: <684b0a740701261905o76ca3a9av6425b88cd1c3b9fc@mail.gmail.com>

Hi everyone,

I'm trying to make my apps more informative to the user, so I want to know
if its possible to get the output of the execution of a console command
while it's been generated, I mean, I want to get the output from
commands.getstatusoutput('CMD') while CMD it's been executed and not wait
until CMD have finished (because CMD take very long time to).

Thanks for all

Raul
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070126/95f50f6b/attachment.html>

From icius at comcast.net  Sun Jan 21 03:11:31 2007
From: icius at comcast.net (icius)
Date: 21 Jan 2007 00:11:31 -0800
Subject: SOAPpy and ArrayOfString
Message-ID: <1169367091.902030.197480@m58g2000cwm.googlegroups.com>

Hello all,

I am trying to use a web services API with Python and SOAPpy as a
client.  Some of the method paramters in this web service's WSDL are
asking for an "ArrayOfString" type. Here is my code so far:

#!/usr/bin/python

from SOAPpy import WSDL

wsdlFile =
'http://localhost:8080/axis/services/USD_R11_WebService?WSDL'

server = WSDL.Proxy(wsdlFile)

server.soapproxy.config.dumpSOAPOut = 1
server.soapproxy.config.dumpSOAPIn = 1

SID = server.login('srvcdesk', 'xxxxxxxx')

contacts = server.doSelect(SID, 'cnt', "userid = 'abeju01'", 1,
['last_name', 'first_name', 'userid'])


I tried using a simple Python list for the argument that wants
"ArrayOfString".  Python generates the following XML for the last
argument of the "doSelect" command above:

<v5 SOAP-ENC:arrayType="xsd:string[3]" xsi:type="SOAP-ENC:Array">
<item>last_name</item>
<item>first_name</item>
<item>userid</item>
</v5>


The web service does not like this at all and returns the following
error:

SOAPpy.Types.faultType: <Fault soapenv:Server.userException:
org.xml.sax.SAXException: Bad types (class [Ljava.lang.Object; -> class
usdjws65.ArrayOfString): >


I know in Perl I had to do some special gyrations to pass the right
structue for ArrayOfString to this same web service.  Is there any way
to force a type in Python or any other ideas on how to do this?



From mail at microcorp.co.za  Mon Jan  8 06:12:37 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 8 Jan 2007 13:12:37 +0200
Subject: where is python on linux?
References: <1168160755.253030.132260@i15g2000cwa.googlegroups.com><45a157a0$0$289$426a74cc@news.free.fr>
	<Xns98B1B092FD1ADrzantowgmailcom@208.49.80.253>
Message-ID: <01f801c73316$3d5dc100$03000080@hendrik>

"rzed" <rzantow at gmail.com> wrote:


>mmmmmmm... sloppy joes ....
>
>-- 
>rzed
>
>"A sandwich is a sandwich, but a Manwich is a meal."

You eat people?

- Hendrik




From kj7ny at nakore.com  Thu Jan 11 13:46:06 2007
From: kj7ny at nakore.com (kj7ny)
Date: 11 Jan 2007 10:46:06 -0800
Subject: Is there a good example on instantiating, calling, using,
	an API from Python on Windows?
Message-ID: <1168541166.457806.133320@p59g2000hsd.googlegroups.com>

Is there a good example on instantiating, calling, using, etc., an API
from Python?

I need to use Python to talk to another system through that system's
API's on Windows XP.

Can you point me to documentation and/or a good example of Python using
3rd party API's? (Preferably a good example rather than just
documentation.)

And, can I do this from Python 2.4.# or should I try to learn how to
use Iron Python?  (By the way, if the examples could be for python
2.4.# it would be preferable.)

Thanks,



From wojciech_mula at poczta.null.onet.pl.invalid  Mon Jan  8 13:55:10 2007
From: wojciech_mula at poczta.null.onet.pl.invalid (Wojciech =?ISO-8859-2?Q?Mu=B3a?=)
Date: Mon, 8 Jan 2007 18:55:10 +0000 (UTC)
Subject: More Efficient fnmatch.fnmatch for multiple patterns?
References: <1168279822.921033.267210@v33g2000cwv.googlegroups.com>
Message-ID: <slrneq54lr.4ao.wojciech_mula@cat.tac>

abcd wrote:
> I am using fnmatch.fnmatch to find some files.  The only problem I have
> is that it only takes one pattern...so if I want to search using
> multiple patterns I have to do something like....
>
> patterns = ['abc*.txt', 'foo*']
> 
> for p in patterns:
>     if fnmatch.fnmatch(some_file_name, p):
>         return True
>
> ...is there a built-in function that will match using multiple patterns?

import re
pats = re.compile('|'.join(fnmatch.translate(p) for p in patterns))

if pats.match(some_file_name):
	return True

w.


From bborcic at gmail.com  Thu Jan 25 19:22:03 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Fri, 26 Jan 2007 01:22:03 +0100
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <4866bea60701251102o6af055e1j2d85de2f30b64c64@mail.gmail.com>
References: <45b6231b$1_2@news.bluewin.ch>	<4866bea60701230724y3a51bc31p9970075f99b70d05@mail.gmail.com>	<ep7qoe$jdg$1@sea.gmane.org>	<4866bea60701240736v837d246w187ecb1ccb90eefd@mail.gmail.com>	<epa2dh$jl3$1@sea.gmane.org>	<4866bea60701250609u61e72d30q21dd11c8c8fd9bcd@mail.gmail.com>	<epasho$rf7$1@sea.gmane.org>
	<4866bea60701251102o6af055e1j2d85de2f30b64c64@mail.gmail.com>
Message-ID: <epbhmc$p1k$1@sea.gmane.org>

Chris Mellon wrote:
>> Maybe. In any case, color separation solves my (sub)problem : the blue layer
>> from the wx generated model matches the green layer from the app's window, pixel
>> for pixel (at least with antialiasing and cleartype on, while writing black on
>> white).
>>
> 
> That's... extremely interesting.

Difficult to believe, you mean :) Well, you are right, somehow I mixed up layer 
colors; in the end I compare just the blue layers and it does what I wanted.

Cheers, BB



From adam at atlas.st  Fri Jan 12 00:41:26 2007
From: adam at atlas.st (Adam Atlas)
Date: 11 Jan 2007 21:41:26 -0800
Subject: Announcement -- ZestyParser
In-Reply-To: <1168407920.281020.147680@k58g2000hse.googlegroups.com>
References: <1168407920.281020.147680@k58g2000hse.googlegroups.com>
Message-ID: <1168580486.921117.317630@v45g2000cwv.googlegroups.com>

Thanks for the responses; you're right, and I have now posted the
examples online. I just released version 0.6.0, by the way, which has
several worthwhile improvements and much better documentation. It also
includes an example for parsing RDF Notation3, to demonstrate a parsing
task a bit more complex than the other examples.

That's all posted at <http://adamatlas.org/2006/12/ZestyParser/> now.



From 3dbernard at gmail.com  Fri Jan 19 15:11:15 2007
From: 3dbernard at gmail.com (Bernard Lebel)
Date: Fri, 19 Jan 2007 15:11:15 -0500
Subject: pywin32 for Windows x64
Message-ID: <61d0e2b40701191211k6acce9ddvcf56f471214bfa6f@mail.gmail.com>

Hello,

Softimage has gracefully released an x64 build of the pywin32
extension, free for download.

http://webrel2.softimage.com/open/products/xsi/v6/pywin32-207.win64-py2.4.exe


(if that link doesn't work, go to
http://www.softimage.com/downloads/XSI6_EssAdv/default.aspx, and look
for Python 64)



Cheers
Bernard


From steve at REMOVEME.cybersource.com.au  Mon Jan 29 00:46:54 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Mon, 29 Jan 2007 16:46:54 +1100
Subject: sending a class as an argument
References: <1170044663.163303.131930@v45g2000cwv.googlegroups.com>
Message-ID: <pan.2007.01.29.05.46.53.354383@REMOVEME.cybersource.com.au>

On Sun, 28 Jan 2007 20:24:23 -0800, manstey wrote:

> Hi,
> 
> Our class has its attributes set as classes, as in
> 
> MyClass.Phone.Value='34562346'
> MyClass.Phone.Private=True

The Python convention is that classes have initial capitals (MyClass),
instances do not, and nor do attribute names.

I'm thinking you're doing this:

class Phone: pass
class MyClass: pass

# now set a _class_ attribute -- all instances share this attribute
MyClass.Phone = Phone()  # attribute name is the same as a class

Why do all instances of MyClass share the same phone number?

I think that's a bad design. You should probably do this:

# now set an _instance_ attribute
instance = MyClass()
instance.phone = Phone()

Of course, in practice you'd do this in an __init__ method rather than as
two separate lines:

instance = MyClass()  # automatically creates instance.phone


Of course, I could be wrong -- you haven't really given enough information
for me to be sure what you're doing.


> Inside the MyClass definition we have a function like this:

The word is "method", not function. Methods live in classes, functions
outside.

 
> def MyFunc(self,clsProperty):
>    if clsProperty.Private:
>         print 'Private property'
>    else:
>         print ClsProperty.Value

If you have a whole lot of attributes with the same attribute (in this
case, private), you should really be thinking about a more object-oriented
design. As it stands now, your MyClass needs to know all the fundamental
workings of your Phone class, your Name class, your Address class, etc.
That's bad design. Your MyClass should just say "give me your value" and
the Phone class should know that if it is private, it returns "private
property". Etc.



> In our code, we then call
>>>> MyClass.MyFunc(MyClass.Phone)
>
> We want to be able in our code instead simply to call:
>>>> MyClass.MyFunc(Phone) or MyClass.MyFunc('Phone')
> 
> But we can't get it to work. If we rewrite the function as follows:
> 
> def MyFunc(self,attr):
>    if self.attr.Private:
>       print 'Private'
>    else:
>       print self.attr.Value
> 
> we get an error.

Oooh, no don't tell us what it is, let me guess! I love guessing games!

Does it crash your PC?

Here's how I would do it. Each attribute should know how to "MyFunc"
itself: give it a myfunc method.

class Phone:
    def __init__(self, number, private=False):
        self.phonenumber = number
        self.private = private
    def myfunc(self):
        if self.private:
            return "private"
        else:
            return str(self.phonenumber)


Now you can simplify your MyFunc method:

def myfunc(self, attrname):
    """Delegate myfunc to the named attribute."""
    return getattr(self, attrname).myfunc()

Or not even bother, and just write MyClass.phone.myfunc(). 



-- 
Steven D'Aprano 




From NutJob at gmx.net  Thu Jan 25 10:16:53 2007
From: NutJob at gmx.net (antred)
Date: 25 Jan 2007 07:16:53 -0800
Subject: Python email parser
In-Reply-To: <1169738001.643280.140880@a75g2000cwd.googlegroups.com>
References: <1169738001.643280.140880@a75g2000cwd.googlegroups.com>
Message-ID: <1169738213.327156.289200@l53g2000cwa.googlegroups.com>

Hmm, I'm not sure whether I'd call 30 secs for 110 MB particularly
slow. I mean that *IS* a lot of data.



From bearophileHUGS at lycos.com  Tue Jan 16 12:58:50 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 16 Jan 2007 09:58:50 -0800
Subject: A note on heapq module
In-Reply-To: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
Message-ID: <1168970329.751502.57320@11g2000cwr.googlegroups.com>

I think the sort has to be simplified, otherwise it can't keep the heap
invariant...

def sort(self):
    self.h.sort()

Bye,
bearophile



From James.w.Howard at gmail.com  Fri Jan 19 12:42:04 2007
From: James.w.Howard at gmail.com (JamesHoward)
Date: 19 Jan 2007 09:42:04 -0800
Subject: Asyncore select statement problem
In-Reply-To: <mailman.2871.1169133210.32031.python-list@python.org>
References: <1169075120.491855.103200@q2g2000cwa.googlegroups.com>
	<mailman.2871.1169133210.32031.python-list@python.org>
Message-ID: <1169228524.810461.51160@a75g2000cwd.googlegroups.com>

Thank you for the responses.  I have learned considerably more about
how Asyncore works because of it.

The problem that I see is that Asyncore's poll function does not seem
to be thread safe.  From what I can tell, I am calling
dispatcher.close() properly and the dispatchers are removed from
asyncore's global map (all except the server itself).  However, it
seems like the error happens when the poll function gets the file
descriptors to run select on and then the thread ticks and removes them
from the global map.  After this the select call is made, but the file
descriptors are not valid anymore.

I guess I have two questions as a result.  First, is this a problem
that anyone else has had and second is there a fix for it?  I have
tried looking for Asyncore thread safe topics in Google, but without
much luck.  If needed I think making the poll function atomic in the
asyncore module might fix this problem, but I wanted to see what other
people thought first.

Thanks again for the help,
Jim Howard


Gabriel Genellina wrote:
> "JamesHoward" <James.w.Howard at gmail.com> escribi? en el mensaje
> news:1169075120.491855.103200 at q2g2000cwa.googlegroups.com...
>
> >I have a problem with python's asyncore module throwing a bad file
> > descriptor error.  The code might be difficult to copy here, but the
> > problem is essentially:
> >
> > The server wants to sever the connection of an open Asyncore socket.
> > Calling the socket.close() nor the socket.shutdown(2) calls seem to
> > work.  The only way I can close the connection without creating the
> > error below is to have the client close the connection.
>
> You have to use the dispatcher's close() method, else, the asyncore map
> won't be updated, keeping a reference to the closed socket.
> 
> -- 
> Gabriel Genellina



From nagle at animats.com  Wed Jan 24 19:15:16 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 24 Jan 2007 16:15:16 -0800
Subject: The reliability of python threads
In-Reply-To: <mailman.3105.1169664198.32031.python-list@python.org>
References: <mailman.3092.1169657938.32031.python-list@python.org>	<ep841j$anu$1@gemini.csx.cam.ac.uk>	<mailman.3095.1169659417.32031.python-list@python.org>	<ep883i$iom$1@gemini.csx.cam.ac.uk>	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
Message-ID: <OcSth.203$MN.129@newssvr23.news.prodigy.net>

Carl J. Van Arsdall wrote:
> Chris Mellon wrote:
> 
>> On 24 Jan 2007 18:21:38 GMT, Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
>>  
>>
>>> [snip]
>>>
>>>     
>>
>>
>> I'm aware of the issues with the POSIX threading model. I still stand
>> by my statement - bringing up the problems with the provability of
>> correctness in the POSIX model amounts to FUD in a discussion of
>> actual problems with actual code.
>>
>> Logic and programming errors in user code are far more likely to be
>> the cause of random errors in a threaded program than theoretical
>> (I've never come across a case in practice) issues with the POSIX
>> standard.
>>   
> 
> Yea, typically I would think that.  The problem I am seeing is 
> incredibly intermittent.  Like a simple pyro server that gives me a 
> problem maybe every three or four months.  Just something funky will 
> happen to the state of the whole thing, some bad data, i'm having an 
> issue tracking it down and some more experienced programmers mentioned 
> that its most likely a race condition.  

     Right.  You're at MonteVista, which does real-time Linux systems
and support.  There will be people there who thoroughly understand
thread issues.  (I've used QNX for real time, but MonteVista has
made progress since in recent years.)

     The Python thread documentation is kind of vague about how
well the Python primitives are protected against concurrency problems.
For example, do you have to protect basic types like lists
and hashes against concurrent access?  Is "pop" atomic?
(It is in "dequeue", but what about regular lists?)
Can you crash Python from within Python via concurrency errors?
Does the garbage collector run concurrently or does it freeze
all threads?  What's different depending upon whether you're using
real OS threads or simulated Python threads?

					John Nagle


From george.sakkis at gmail.com  Wed Jan 24 02:59:40 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 23 Jan 2007 23:59:40 -0800
Subject: numpy or _numpy or Numeric?
In-Reply-To: <ep71iq$26m$1@news.kreonet.re.kr>
References: <ep71iq$26m$1@news.kreonet.re.kr>
Message-ID: <1169625580.411463.216040@s48g2000cws.googlegroups.com>

On Jan 24, 2:24 am, auditory <pkyo... at gmail.com> wrote:

> I am a newbie here
>
> I am trying to read "space separated floating point data" from file
>
> I read about csv module by searching this group,
> but I couldn't read space separated values with csv.
> (which may be matter of course..)
>
> I also read about numpy.fromfile(file, sep=' ') which i can use.
> but on my machine(ubuntu linux) numpy is unknown module,
> which I didn't install by myself.
>
> While trying to install numpy accroding to its homepage.
> (http://numpy.scipy.org/numpydoc/numdoc.htm).
> i am quite confused.
>
> it's talking about the Numerical Python,
> and it says to test whether it is installed or not,
> try import Numeric instead of numpy.
>
> I got Nurmeric modules and
> as a matter of fact i got a file named '_numpy.so' in lib directory.
>
> I can import _numpy but _numpy does not have 'fromfile' method
>
> My question is:
> 1. Do i need to install numpy module?
> 2. Then Is it different from Numeric module?
> 3. Then where can i get it?
>
> 4. Or what is general way to read 'space separated values' from file?
>
> Thanks in advance.

If *all* you need is to read a space-separated file with floating point
values, installing numpy (or Numeric or numarray..) is an overkill; you
can do it in one line in pure Python:

matrix = [map(float, line.split()) for line in
open('my_space_separated_file.txt')]

This stores the values as a list of lists, each list corresponding to a
row in the file. Depending on what you plan to do next with these
numbers, this may or may not be the best way to go about it, but since
you only mentioned the file reading part, we can't assume much.

George



From nmm1 at cus.cam.ac.uk  Sat Jan 13 04:59:49 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 13 Jan 2007 09:59:49 GMT
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<eo65qk$bsr$1@sea.gmane.org>
	<cb63d1e10701111420l28d0f0d0s35217370d86067b@mail.gmail.com>
	<mailman.2650.1168618607.32031.python-list@python.org>
	<eo8foc$7mh$1@gemini.csx.cam.ac.uk>
	<pan.2007.01.13.00.22.45.142174@REMOVE.THIS.cybersource.com.au>
Message-ID: <eoaail$nm$1@gemini.csx.cam.ac.uk>


In article <pan.2007.01.13.00.22.45.142174 at REMOVE.THIS.cybersource.com.au>,
Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
|> > 
|> > Some of the algebraic languages.  (2/3)^(1/5) is held as such and
|> > manipulated appropriately.
|> > 
|> > Yes, I know that's "cheating" :-)
|> 
|> I see your smiley, and I still don't understand. Why on earth would you
|> call it cheating for a language to have a data type that is suitable for
|> the data being used? Maybe it's a form of humour I don't get -- like
|> pointing at a car and saying "Look, a cow!".

Oh, because it's not a proper data type!  The data type is an expression,
and is held in a structured form, of which such powers may be one level.
This is better regarded as an optimisation of a common case than a true
data type.  Now, there MAY be such a language that supports such things
as a proper data type, but I don't know of one.


Regards,
Nick Maclaren.


From GatlingGun at gmail.com  Wed Jan 31 06:46:09 2007
From: GatlingGun at gmail.com (TOXiC)
Date: 31 Jan 2007 03:46:09 -0800
Subject: Regex with ASCII and non-ASCII chars
Message-ID: <1170243969.504255.134100@v33g2000cwv.googlegroups.com>

Hello everybody.
How I can do a regex match in a string with ascii and non ascii chars
for example:

    regex = re.compile(r"(???????ty)", re.IGNORECASE)
    match = regex.search("???????ty")
    if match:
        result = match.group()
        print result
    else:
        result = "No match found"
        print result

it return "no match found" even if the two string are equal.
Help me please!
Thx in advance :)



From mal at egenix.com  Thu Jan 11 18:04:44 2007
From: mal at egenix.com (M.-A. Lemburg)
Date: Fri, 12 Jan 2007 00:04:44 +0100
Subject: Summarizing data by week
In-Reply-To: <1168372624.543712.149070@77g2000hsv.googlegroups.com>
References: <1168372624.543712.149070@77g2000hsv.googlegroups.com>
Message-ID: <45A6C28C.6020007@egenix.com>

On 2007-01-09 20:57, Mike Orr wrote:
> What's the best way to summarize data by week?  I have a set of
> timestamped records, and I want a report with one row for each week in
> the time period, including zero rows if there are weeks with no
> activity.  I was planning to use ISO weeks because datetime has a
> convenient .isocalendar() method, but I want each output row to have a
> label like this:
> 
>     2006 week 5 (Feb)
> 
> However, to get the month (of the Thursday of that week) I have to
> convert it back to an actual date,and I don't see a method to do that
> in datetime or dateutil or mx.DateTime.

You probably want to use mx.DateTime.ISO.WeekTime():

def WeekTime(year,isoweek=1,isoday=1,hour=0,minute=0,second=0.0):

    """Week(year,isoweek=1,isoday=1,hour=0,minute=0,second=0.0)

       Returns a DateTime instance pointing to the given ISO week and
       day.  isoday defaults to 1, which corresponds to Monday in the
       ISO numbering. The time part is set as given.

    """

The ISO submodule has more APIs related to ISO weeks and the
ISO date format in general:

    http://www.egenix.com/files/python/mxDateTime.html#ISO

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Jan 12 2007)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


From aahz at pythoncraft.com  Tue Jan 30 19:19:30 2007
From: aahz at pythoncraft.com (Aahz)
Date: 30 Jan 2007 16:19:30 -0800
Subject: how to "free" an object/var ?
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
Message-ID: <eponai$818$1@panix3.panix.com>

In article <dfacb$45bfd788$d443bb3a$7010 at news.speedlinq.nl>,
Stef Mientki  <S.Mientki-nospam at mailbox.kun.nl> wrote:
>
>If I create a large array of data or class, how do I destroy it (when
>not needed anymore) ?

You should be aware that releasing memory may not cause the size of your
process to shrink -- many OSes keep memory assigned to an application for
its lifetime.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From gh at ghaering.de  Thu Jan 25 11:36:48 2007
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Thu, 25 Jan 2007 17:36:48 +0100
Subject: sqlite user-defined functions & unicode issue
In-Reply-To: <6282abf10701232123p306a85adq9ddf49f9ad2d56b8@mail.gmail.com>
References: <6282abf10701232123p306a85adq9ddf49f9ad2d56b8@mail.gmail.com>
Message-ID: <epaltv$vr6$1@sea.gmane.org>

Ben Wolfson wrote:
> I've got a db some of whose elements have been created automatically
> from filesystem data (whose encoding is iso-8859-1).  If I try to
> select one of those elements using a standard SQL construct, things
> work fine:
> [...]
> 
> How can I get around this?  I really want to be able to search by
> regexp, and not just the standard SQL %-pattern.

Looks like SQLite does not want to pass non-UTF8 strings to functions. 
The attached script shows that it does work with unicode and buffer 
(BLOB) parameters, but not with non-UTF8 strings.

Text has to be encoded in UTF-8 in SQLite, it's just not enforced 
usually. Looks like SQLite enforces it here, though. Kind of ...

-- Gerhard
-------------- next part --------------
A non-text attachment was scrubbed...
Name: test_func.py
Type: text/x-python
Size: 650 bytes
Desc: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20070125/d26f000a/attachment.py>

From http  Fri Jan 12 18:53:33 2007
From: http (Paul Rubin)
Date: 12 Jan 2007 15:53:33 -0800
Subject: MP3 decoder module?
References: <7x4pqvste8.fsf@ruckus.brouhaha.com>
Message-ID: <7xac0ng5tu.fsf@ruckus.brouhaha.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> Basically I want to write a program that takes an mp3 audio file and
> finds the silent frames, with the idea of chopping the file into
> segments at those points automatically, or compressing the silences
> out of spoken audio to make it play faster without chipmunking up the
> pitch, etc.  Of course if you know of something that does this stuff
> already, that can help too.

I should add: I prefer not to expand the entire file to WAV and crunch
on that.  This is partly because I want to look for silences in
specific places in the mp3 without having to decode the whole file,
partly because I still need to know where the original mp3 frames are
in the file.  For the actual files I want to crunch, I don't need to
handle VBR, but it would be nice to support it just from the point of
view of doing things right.


From e0427417 at student.tuwien.ac.at  Tue Jan  9 13:37:36 2007
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Tue, 09 Jan 2007 19:37:36 +0100
Subject: Yield
In-Reply-To: <mailman.317.1163751303.32031.python-list@python.org>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>	<455b4f9f$1@usenet01.boi.hp.com>	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>	<455c15ca$1@news.eftel.com>	<mailman.227.1163664079.32031.python-list@python.org>	<455c1ddf@news.eftel.com>	<1163691173.737911.130410@i42g2000cwa.googlegroups.com>
	<mailman.317.1163751303.32031.python-list@python.org>
Message-ID: <45a3e096$0$8024$3b214f66@tunews.univie.ac.at>

Fredrik Lundh schrieb:
> Danny Colligan wrote:
> 
>> Carsten mentioned that generators are more memory-efficient to use when
>> dealing with large numbers of objects.  Is this the main advantage of
>> using generators?  Also, in what other novel ways are generators used
>> that are clearly superior to alternatives?
> 
> the main advantage is that it lets you decouple the generation of data
> from the use of data; instead of inlining calculations, or using a pre-
> defined operation on their result (e.g printing them or adding them to a
> container), you can simply yield them, and let the user use whatever
> mechanism she wants to process them.  i.e. instead of
> 
>     for item in range:
>         calculate result
>         print result
> 
> you'll write
> 
>     def generate():
>         for item in range:
>             yield result
> 
> and can then use
> 
>     for item in generate():
>         print item
> 
> or
> 
>    list(process(s) for s in generate())
> 
> or
> 
>    sys.stdout.writelines(generate())
> 
> or
> 
>    sum(generate())
> 
> etc, without having to change the generator.
> 
> you can also do various tricks with "endless" generators, such as the
> following pi digit generator, based on an algorithm by Python's grand-
> father Lambert Meertens:
> 
> def pi():
>     k, a, b, a1, b1 = 2, 4, 1, 12, 4
>     while 1:
>         # Next approximation
>         p, q, k = k*k, 2*k+1, k+1
>         a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
>         # Yield common digits
>         d, d1 = a/b, a1/b1
>         while d == d1:
>             yield str(d)
>             a, a1 = 10*(a%b), 10*(a1%b1)
>             d, d1 = a/b, a1/b1
> 
> import sys
> sys.stdout.writelines(pi())
> 
> </F>
> 

or fibonacci:

def fib():
	a, b = 0, 1
	while True:
		yield a
		a, b = b, a+b

now get the first 10 ones:

>>> from itertools import *
>>> list(islice(fib(),10))
[0, 1, 1, 2, 3, 5, 8, 13, 21, 34]


or primes:

def primes():
	yield 1
	yield 2
	
	p      = 3
	psofar = []

	smallerPrimes = lambda: takewhile(lambda x: x+x <= p,psofar)
	
	while True:
		if all(p % n != 0 for n in smallerPrimes()):
			psofar.append(p)
			yield p
		
		p += 2

etc.


From dan.jakubiec at gmail.com  Mon Jan 22 23:39:52 2007
From: dan.jakubiec at gmail.com (dan.jakubiec at gmail.com)
Date: 22 Jan 2007 20:39:52 -0800
Subject: Passing Python socket objects to child processes in Windows
Message-ID: <1169527192.554878.260640@38g2000cwa.googlegroups.com>

I'm trying to write a Python app which accepts a socket connection and
then spawns another Python process to handle it.  I need it to run
under both Linux and Windows.  I have it working under Linux, but am
having problems with the Windows implementation.

My app uses the subprocess.Popen class to spawn the child process.  The
first problem I ran into was that Windows Python won't let you pass a
socket object via the Popen stdin argument (it results in a "bad file
descriptor" error).  File object work okay, but sockets seem to be
handled differently.

After some searching, I found something of a work-around in this post:
http://mail.python.org/pipermail/python-list/2004-October/287742.html.

This workaround uses pywin32 to duplicate the original socket handle
via the Win32 API.  It almost works, in the sense that I now have a
file stream in my child process which corresponds to the original
socket object in the parent.  But I can't find a way to convert the
resulting Windows file handle into a Python socket object (there does
not appear to be a Windows-equivalent of the socket.fromfd() function).
 My app needs the socket object in order to control TCP stuff.

So I'm a bit stuck.  Is there a better way (or any way?) to pass a
socket to a child process in Windows, and to actually end up with a
Python socket object in the child process?

Thanks in advance for any help.

--
Dan Jakubiec



From grante at visi.com  Sat Jan  6 01:35:35 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 06 Jan 2007 06:35:35 -0000
Subject: Just Getting Started with Python on MS XP Pro
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
	<1168064599.558820.9410@42g2000cwt.googlegroups.com>
Message-ID: <12pugpnf0fchj97@corp.supernews.com>

On 2007-01-06, DouhetSukd at gmail.com <DouhetSukd at gmail.com> wrote:

> The only real XP drawback is that Python is not bundled on
> Windows, while it is included with OS X and most (all?) Linux
> distros.

While it's true that Microsoft doesn't bundle Python with
Windows, a _lot_ of XP computers do come with Python installed.
My IBM ThinkPad came out of the box with Python installed. I've
read that a few other large PC vendors (HP/Compaq?) also ship
Python pre-installed on their machines.

However, it's not usually installed in a manner that makes it
conveniently usable by the end-user...

-- 
Grant Edwards                   grante             Yow!  NOW, I'm supposed
                                  at               to SCRAMBLE two, and HOLD
                               visi.com            th' MAYO!!


From bdesth.quelquechose at free.quelquepart.fr  Sun Jan  7 17:40:46 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 07 Jan 2007 23:40:46 +0100
Subject: Working with Excel inside Python
In-Reply-To: <1168205727.130771.257030@51g2000cwl.googlegroups.com>
References: <1168205727.130771.257030@51g2000cwl.googlegroups.com>
Message-ID: <45a170ae$0$310$426a74cc@news.free.fr>

AleydisGP at gmail.com a ?crit :
> I have a .plt file (which is a tab delimited ASCII file) and I want to
> format it to get a .dbf with data in rows and columns, detele some
> rows/columns and substitute decimal '.' with ','. All this using Python

Then you may want to have a look here:
http://docs.python.org/lib/module-csv.html
and here:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362715

> (I'm using Pythonwin).
> 
> The .plt file looks like this:
> 
> * ISCST3 (02035): Tersa
> * MODELING OPTIONS USED:
> *  CONC                    URBAN ELEV         DFAULT
> 
> *         PLOT FILE OF ANNUAL VALUES FOR SOURCE GROUP: ALL
> *         FOR A TOTAL OF   400 RECEPTORS.
> *         FORMAT: (3(1X,F13.5),1X,F8.2,2X,A6,2X,A8,2X,I8.8,2X,A8)
> *        X             Y      AVERAGE CONC   ZELEV
> *  ___________   ___________   ___________   ______
>   430342.00000 4580537.00000       0.25426    19.28
>   430842.00000 4580537.00000       0.27233    14.72
>   431342.00000 4580537.00000       0.30566     2.84
>   431842.00000 4580537.00000       0.30379     0.21
>   432342.00000 4580537.00000       0.27413     1.13
>   432842.00000 4580537.00000       0.25462     0.00
>   433342.00000 4580537.00000       0.25114     0.00
>   433842.00000 4580537.00000       0.28779     0.00
>   434342.00000 4580537.00000       0.29707     0.00
>   434842.00000 4580537.00000       0.31067     0.00
>  .... 
> 
> I recorded a macro in Excel with the whole process, but when trying to
> translate it into Python I get syntax errors which I don't know how to
> solve.
> 
> This is my python code:
> ## ------------------------------------------
> import win32com.client
> excel = win32com.client.Dispatch("Excel.Application")
> excel.Visible = 0
> workbook=excel.Workbooks.Open('D:\AN00GALL.plt')
> excel.Columns("A:A").Select
> excel.Selection.Replace What:=".", Replacement:=",", LookAt:=xlPart, _
>         SearchOrder:=xlByRows, MatchCase:=False, SearchFormat:=False, _
>         ReplaceFormat:=False

Ok. Where is your attempt to "translate" to Python, exactly ? So far, 
except for the first 2 lines, it's vb code, not Python. Please start by 
learning Python, then start doing the translation - and then we'll be 
glad to help you.

(snip vb code)

> Any ideas on what am I doing wrong?

Yes : trying to feed vb code to the Python interpreter.



From nmm1 at cus.cam.ac.uk  Sat Jan 13 05:13:09 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 13 Jan 2007 10:13:09 GMT
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org><50fudtF1g1nplU1@mid.individual.net><envur1$rq1$1@gemini.csx.cam.ac.uk><mailman.2480.1168350033.32031.python-list@python.org><Xns98B384E126F4Ctim111one@216.196.97.136><eo0mjf$i4h$1@gemini.csx.cam.ac.uk><Xns98B3A00749D6tim111one@216.196.97.136><eo2c3l$5v2$1@gemini.csx.cam.ac.uk><Xns98B4E769834AAtim111one@216.196.97.136><eo539l$t3b$1@gemini.csx.cam.ac.uk><mailman.2632.1168583141.32031.python-list@python.org>
	<eo7kdf$a80$1@gemini.csx.cam.ac.uk
Message-ID: <eoabbl$270$1@gemini.csx.cam.ac.uk>


In article <mailman.2685.1168670120.32031.python-list at python.org>,
"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
|> 
|> *grin* - I was around at that time, and some of the inappropriate habits
|> almost forced by the lack of processing power still linger in my mind,
|> like - "Don't use division if you can possibly avoid it, - its EXPENSIVE!"
|> - it seems so silly nowadays.

Yes, indeed, but that one is actually still with us!  Integer division
is done by software on a few systems, and floating-point division is
often not vectorisable or pipelines poorly.  But, except for special
cases of little relevance to Python, it is not the poison that it was
back then.

|> As an old slide rule user - I can agree with this - if you know the order
|> of the answer, and maybe two points after the decimal, it will tell you
|> if the bridge will fall down or not. Having an additional fifty decimal
|> places of accuracy does not really add any real information in these
|> cases.  Its nice of course if its free, like it has almost become - but
|> I think people get mesmerized by the numbers, without giving any
|> thought to what they mean - which is probably why we often see
|> threads complaining about the "error" in the fifteenth decimal place..

Agreed.  But the issue is really error build-up, and algorithms that are
numerically 'unstable' - THEN, such subtle differences do matter.  You
still aren't interested in more than a few digits in the result, but you
may have to sweat blood to get them.

|> > [*] Assuming signed magnitude, calculate the answer truncated towards
|> > zero but keep track of whether it is exact.  If not, force the last
|> > bit to 1.  An old, cheap approximation to rounding.
|> >
|> This is not so cheap - its good solid reasoning in my book -
|> after all, "something" is a lot more than "nothing" and should
|> not be thrown away...

The "cheap" means "cheap in hardware" - it needs very little logic,
which is why it was used on the old, discrete-logic, machines.

I have been told by hardware people that implementing IEEE 754 rounding
and denormalised numbers needs a horrific amount of logic - which is
why only IBM do it all in hardware.  And the decimal formats are
significantly more complicated.

What I don't know is how much precision this approximation loses when
used in real applications, and I have never found anyone else who has
much of a clue, either.


Regards,
Nick Maclaren.


From martin at v.loewis.de  Sat Jan 20 05:29:23 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 20 Jan 2007 11:29:23 +0100
Subject: PQueue and Python 2.5
In-Reply-To: <1169216890.617239.209170@51g2000cwl.googlegroups.com>
References: <1169216890.617239.209170@51g2000cwl.googlegroups.com>
Message-ID: <45B1EF03.9020406@v.loewis.de>

Berteun Damman schrieb:
> I haven't got a clue how to investigate this, but I would be willing to
> help if someone has any ideas.

There are a number of problems in this code; the most significant one is
the incorrect usage of memory management API. In pqueue_dealloc, the
call PyMem_DEL(pqp) should read PyObject_DEL(pqp), as the object was
allocated with PyObject_NEW. Because this was a common error once,
Python up to 2.4 detected that error and silently corrected it (at some
runtime cost); Python 2.5 now has removed this work-around.

I'll contact the author.

Regards,
Martin


From Barry.Carroll at psc.com  Tue Jan  9 18:31:33 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Tue, 9 Jan 2007 15:31:33 -0800
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5 (Final report)
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A6D@eugsrv400.psc.pscnet.com>

John et al:

I've spent about a day investigating our "too many open files" error.  I
found the following:  

	1. Windows XP allows a Python 2.5 script to open 509 concurrent 
	   files.  
	2. RedHat Fedora Core 1 allows a Python 2.3 script to open 1022
	   concurrent files.  
	3. The Python 2.5 release notes and the "What's New in Python
2.5" 
	   doc do not mention any changes to the way in which file
objects 
	   of reference counts are handled.  
	4. Other features of the framework also fail when this limit is 
	   reached.  Specifically, our debugger subsystem suffers a
fatal 
	   error if invoked near the point where the file errors start
to 
	   occur.  So more than just file objects are affected here.  

I've spent all the time I can spare chasing this bug.  The lead
programmer is convinced (I think) that we have a reference count problem
somewhere, so perhaps he will persue it.  If any more useful information
comes up on this subject, I'll post it here.  

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed




From horpner at yahoo.com  Thu Jan 11 09:01:48 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 11 Jan 2007 15:01:48 +0100
Subject: Type casting a base class to a derived one?
References: <mailman.2571.1168518354.32031.python-list@python.org>
Message-ID: <slrneqcgve.1n0.horpner@FIAD06.norwich.edu>

On 2007-01-11, Frederic Rentsch <anthra.norell at vtxmail.ch> wrote:
> If I derive a class from another one because I need a few extra
> features, is there a way to promote the base class to the
> derived one without having to make copies of all attributes?
>
> class Derived (Base):
>    def __init__ (self, base_object):
>       # ( copy all attributes )
>       ...
>
> This looks expensive. Moreover __init__ () may not be available
> if it needs to to something else.
>
> Thanks for suggestions

How does it make sense to cast a base to a derived in your
application?

-- 
Neil Cerutti
I'm traveling to all 51 states to see who can stop 85. --Chad Johnson


From rpdooling at gmail.com  Mon Jan 22 10:38:57 2007
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 22 Jan 2007 07:38:57 -0800
Subject: GetBoundingMetrics
In-Reply-To: <1169477592.377844.324590@v45g2000cwv.googlegroups.com>
References: <1169477592.377844.324590@v45g2000cwv.googlegroups.com>
Message-ID: <1169480337.039535.300260@11g2000cwr.googlegroups.com>


BartlebyScrivener wrote:

> I don't get it if I just launch
> firefox from the commandline. Only when I use the Python module.

I spoke too soon. I do get it from the command line if firefox is not
already running. Same is true with the Python script.

Must be a Gnome or Debian thing. Sorry for the distraction.

rd



From paul.rudin at ntlworld.com  Sat Jan 13 04:49:10 2007
From: paul.rudin at ntlworld.com (Paul Rudin)
Date: Sat, 13 Jan 2007 09:49:10 +0000
Subject: mod_python and Content-Type
Message-ID: <8764bbb6jt.fsf@rudin.co.uk>


I'm have a little experiment with mod_python. I'm trying to figure out
how to get hold of the original Content-Type header. 

In my config file I have:

<Directory /var/www/test/atom>
      AddHandler mod_python .py
      PythonHandler atomserv
      PythonDebug On
	    PythonAutoReload On
</Directory>

The file atomserv.py in that directory has a function called handler
that gets called as I expect, but on entry to that function
req.content_type is "text/x-python" whereas my test client sent a
different Content-Type header.

So, how can I either persuade the apache/mod_python machinery to
preserve the original content_type, or else how can I get hold of it?


From sturlamolden at yahoo.no  Wed Jan 10 17:59:07 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 10 Jan 2007 14:59:07 -0800
Subject: Python - C# interoperability
In-Reply-To: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>
References: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>
Message-ID: <1168469947.133549.111070@77g2000hsv.googlegroups.com>


mc wrote:
> Is there an easy way to compile a Python class (or set of classes) into
> a .DLL that a C# program can call?  Or otherwise to use an existing
> library of Python classes from a C# program as seamlessly as possible?

One way is to use IronPython if you don't need modules written for
CPython.

Another option is to use a COM wrapper, e.g. using win32com in Python.

A third option is to embed a Python interpreter in your C# app.



From wolf_tracks at invalid.com  Sat Jan  6 02:57:21 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sat, 06 Jan 2007 07:57:21 GMT
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
	<mailman.2332.1168016502.32031.python-list@python.org>
	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>
Message-ID: <BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>

Ah, I misread wiki as wikpedia. Nevertheless, wikipedia surprises me, as 
well as just wiki sites.


From codecraig at gmail.com  Wed Jan 24 11:32:51 2007
From: codecraig at gmail.com (abcd)
Date: 24 Jan 2007 08:32:51 -0800
Subject: Thoughts on using isinstance
In-Reply-To: <mailman.3087.1169652310.32031.python-list@python.org>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<mailman.3077.1169645738.32031.python-list@python.org>
	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>
	<mailman.3087.1169652310.32031.python-list@python.org>
Message-ID: <1169656371.689791.216360@v33g2000cwv.googlegroups.com>

Well my example function was simply taking a string and printing, but
most of my cases would be expecting a list, dictionary or some other
custom object.  Still propose not to validate the type of data being
passed in?

Thanks.



From martin at v.loewis.de  Tue Jan  9 17:53:25 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 09 Jan 2007 23:53:25 +0100
Subject: What does the -O flag do?
In-Reply-To: <1168381174.638428.168500@k58g2000hse.googlegroups.com>
References: <1168381174.638428.168500@k58g2000hse.googlegroups.com>
Message-ID: <45a41ce5$0$30389$9b622d9e@news.freenet.de>

Sard schrieb:
> "Optimize generated bytecode (also PYTHONOPTIMIZE=x). Asserts are
> suppressed."
> 
> Is removing asserts all it does, where can I find more details?  I'm
> guessing it's not very useful as I hardly ever see it mentioned.

It somewhat depends on the Python version. To find out precisely what
it does, search the source code for Py_OptimizeFlag. In 2.5, it

- causes the interpreter to load .pyo files, not .pyc files
  (in .zip files, just makes .pyo preferred over .pyc)
- causes __debug__ to have a value of 0
- ignores assert statements in source code
- treats __debug__ statically as being 0
- causes the byte code generator to save .pyo files, not .pyc

HTH,
Martin


From facundo at taniquetil.com.ar  Wed Jan 17 11:57:33 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Wed, 17 Jan 2007 16:57:33 +0000 (UTC)
Subject: how to write unicode to a txt file?
References: <1169051293.848769.163860@s34g2000cwa.googlegroups.com>
Message-ID: <eolkhs$1de$1@sea.gmane.org>

Frank Potter wrote:

> But it seems that python can't directly write unicode to a file,

You need to use the method open from module codecs:

>>> import codecs
>>> a = codecs.open("pru_uni.txt", "w", "utf-8")
>>> txt = unicode("campe?n\n", "utf-8")
>>> a.write(txt)
>>> a.close()
>>> 

So, then, from command line:

facundo at expiron:~$ file pru_uni.txt 
pru_uni.txt: UTF-8 Unicode text

:)

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From CRhode at LacusVeris.com  Thu Jan 18 09:54:10 2007
From: CRhode at LacusVeris.com (Chuck Rhode)
Date: Thu, 18 Jan 2007 08:54:10 -0600
Subject: PythonTidy 1.10
Message-ID: <20070118145410.GF1352@loki>

PythonTidy cleans up, regularizes, and reformats the text of Python
scripts.

It is released under the GNU General Public License.  

Python scripts are usually so good looking that no beautification is
required.  However, from time to time, it may be necessary to alter
the style to conform to changing standards.  This script converts
programs in a consistent way.  It abstracts the pretty presentation of
the symbolic code from the humdrum process of writing it and getting
it to work.

This is an upgrade.  There was a big problem with earlier versions:
Canonical values were substituted for strings and numbers.  For
example, decimal integers were substituted for hexadecimal, and
escaped strings for raw strings.  Authors of Python scripts usually
use peculiar notations for peculiar purposes, and doing away with the
peculiarity negatively impacts the readability of the code.

This version preserves the original constants (parsed by *tokenize*)
in a literal pool indexed by the value they evaluate to.  The
canonical values (output by *compiler*) are then translated back (when
possible) to the original constants by looking them up in the literal
pool.

-- 
<P><A
HREF="http://www.lacusveris.com/PythonTidy/PythonTidy-1.10.python">PythonTidy
1.10</A> - Cleans up, regularizes, and reformats the text of Python
scripts. (18-Jan-07)</P>

.. Chuck Rhode, Sheboygan, WI, USA
.. mailto:CRhode at LacusVeris.com?subject=PythonTidy
.. Weather:  http://LacusVeris.com/WX
.. 20? ? Wind WNW 13 mph



From fuzzyman at gmail.com  Fri Jan  5 19:05:15 2007
From: fuzzyman at gmail.com (Fuzzyman)
Date: 5 Jan 2007 16:05:15 -0800
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1167974907.497878.61070@i15g2000cwa.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<1167974907.497878.61070@i15g2000cwa.googlegroups.com>
Message-ID: <1168041915.558354.110570@s80g2000cwa.googlegroups.com>


Carl Banks wrote:
> jeremito wrote:
> > I am writing a class that is intended to be subclassed.  What is the
> > proper way to indicate that a sub class must override a method?
>
> You can't (easily).
>

Well...

How about not defining it on the base class, but check in the
constructor that the attribute exists and that it is of type
FunctionType ?

Fuzzyman
http://www.voidspace.org.uk/python/articles.shtml



From hg at nospam.org  Thu Jan  4 10:19:15 2007
From: hg at nospam.org (hg)
Date: Thu, 04 Jan 2007 16:19:15 +0100
Subject: Problem Running Working Code on Mac
References: <1167946511.531632.41750@11g2000cwr.googlegroups.com>
Message-ID: <w3fnh.11876$Du.9197@newsfe15.lga>

goodepic wrote:

> I'm newish to python and just got my first mac, so sorry if this is
> stupid.  I have a little app developed by someone else in wxGlade that
> implements a complex stats package and language package, all in python.
>  It works fine on my work PC, but not on my laptop.  I have a new
> macbook 2ghz core duo, running os x 10.4.8 with python 2.5 installed (I
> didn't erase the base 2.3, just put /usr/local/bin at the start of
> $PATH), along with the latest wxPython, can't remember the version
> number.  I need to add a few more components from the stats package,
> and I'd like eventually to pretty up the cheap GUI I was given, but
> that'd be icing.  When I try either python <filename> or pythonw
> <filename>, I get this error:
> 
> WARNING:root:Could not import module "PyPar", defining sequential
> interface
> WARNING:root:No MySQLdb module available
> WARNING:root:No pgdb module (PostgreSQL) available
> Traceback (most recent call last):
>   File "febrlgui.py", line 513, in <module>
>     frame_1 = MyFrame(None, -1, "")
>   File "febrlgui.py", line 198, in __init__
>     self.__set_properties()
>   File "febrlgui.py", line 355, in __set_properties
>     self.a_box1.SetSelection(-1)
>   File
> "//Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_core.py",
> line 11487, in SetSelection
>     return _core_.ItemContainer_SetSelection(*args, **kwargs)
> wx._core.PyAssertionError: C++ assertion "IsValid(n)" failed at
> /BUILD/wxPython-src-2.8.0.1/src/mac/carbon/choice.cpp(242) in
> GetString(): wxChoice::GetString(): invalid index
> 
> Of course I'm traveling soon and need to be able to work on this on my
> macbook, so it's down to panic time.  Any help is GREATLY appreciated.
> 
> Thanks,
> Matt


I'd get rid of the warnings first by installing the correct librairies
(PyPar, MySQLDB, pgdb) .... who knows what the side effect are ?

hg



From goodidea1950 at hotmail.spam.com  Sun Jan 28 03:08:00 2007
From: goodidea1950 at hotmail.spam.com (AKA gray asphalt)
Date: Sun, 28 Jan 2007 00:08:00 -0800
Subject: Do I need Python to run Blender correctly?
References: <tRZth.2027$pH3.140@newsfe12.phx>
	<5%4uh.75582$wP1.6882@newssvr14.news.prodigy.net>
	<joTuh.3445$4W5.1382@newsfe10.phx>
	<ssTuh.36083$QU1.26111@newssvr22.news.prodigy.net>
Message-ID: <9TYuh.3468$4W5.752@newsfe10.phx>


"John Nagle" <nagle at animats.com> wrote in message 
news:ssTuh.36083$QU1.26111 at newssvr22.news.prodigy.net...
> AKA gray asphalt wrote:
>> "John Nagle" <nagle at animats.com> wrote in message 
>> news:5%4uh.75582$wP1.6882 at newssvr14.news.prodigy.net...
>>
>>>AKA gray asphalt wrote:
>>>
>>>>I downloaded Blender but there was no link for python. Am I on the right 
>>>>track?
>>>
>>>   Blender doesn't require Python, but if you have Python, you can
>>>write plug-ins for Blender.   Get "The Blender Book"; otherwise
>>>you'll never figure Blender out.
>>>
>>>John Nagle
>>
>>
>> I'm thinking about not upgrading "Strata 3D" because it still doesn't 
>> export textures with obj files and it just created an undo of more than 
>> one action, believe it or not... Am I expectiong too much of a $400+ 
>> program, to export textures with obj files? Does Blender do this? I see 
>> the BBook on Amazon for $30. That's probably my best bet, no?
>
>    Blender has considerable power, but ease of use is a problem.  The
> hotkey listing in the manual is 29 pages.

Is the manual you refer to the group project on blender.org or the $ manual 
like the one on Ebay?




From bj_666 at gmx.net  Sat Jan 27 04:21:46 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 27 Jan 2007 10:21:46 +0100
Subject: python+ncurses: I can't display accents
References: <45ba3573$0$16171$426a34cc@news.free.fr>
	<slrnerkjtc.1f8.horpner@FIAD06.norwich.edu>
	<45ba50c7$0$31432$426a74cc@news.free.fr>
	<slrnerks72.jc.horpner@FIAD06.norwich.edu>
	<45ba77a2$0$26693$426a74cc@news.free.fr>
Message-ID: <pan.2007.01.27.09.21.45.404821@gmx.net>

In <45ba77a2$0$26693$426a74cc at news.free.fr>, Fabrice DELENTE wrote:

> As support for 8-bit (and even unicode) is important for my script, is there
> any hope? Should I switch to slang instead of curses?

Take a look at urwid:

  http://excess.org/urwid/

Ciao,
	Marc 'BlackJack' Rintsch


From timr at probo.com  Sat Jan 13 00:11:19 2007
From: timr at probo.com (Tim Roberts)
Date: Sat, 13 Jan 2007 05:11:19 GMT
Subject: how to clean sys.path
References: <eo0eom$cirq$1@zam602.zam.kfa-juelich.de>
	<p3pbq2h0gaa9qkrl03iansir43vjjp00k7@4ax.com>
	<eo5hpp$2tmo$1@zam602.zam.kfa-juelich.de>
Message-ID: <i8qgq251rtpmvsul05v9jb1dj946skf1mc@4ax.com>

"siggi" <smusnmrNOSPAM at yahoo.com> wrote:
>
>or in plain DOS:
>
>C:\Documents and Settings\User\My Documents\My Python files
>C:\Documents and Settings\User\My Documents\Python25\Lib\idlelib
>C:\Documents and Settings\User\My Documents\Python25\python25.zip
>C:\Documents and Settings\User\My Documents\Python25\DLLs
>C:\Documents and Settings\User\My Documents\Python25\lib
>C:\Documents and Settings\User\My Documents\Python25\lib\plat-win
>C:\Documents and Settings\User\My Documents\Python25\lib\lib-tk
>C:\Documents and Settings\User\My Documents\Python25
>C:\Documents and Settings\User\My Documents\Python25\lib\site-packages
>C:\Documents and Settings\User\My Documents\Python25\lib\site-packages\PIL
>C:\Documents and Settings\User\My Documents\Python25\lib\site-packages\win32
>C:\Documents and Settings\User\My
>Documents\Python25\lib\site-packages\win32\lib
>C:\Documents and Settings\User\My
>Documents\Python25\lib\site-packages\Pythonwin
>C:\Documents and Settings\User\My
>Documents\Python25\lib\site-packages\wx-2.8-msw-ansi
>
>...it just looked horrible to me at first sight!

It looks horrible to me, too.  That's why I install applications like that
in "\Apps" instead of a document off of Documents and setings.  This looks
much better:

C:\Documents and Settings\User\My Documents\My Python files
C:\Apps\Python25\Lib\idlelib
C:\Apps\Python25\python25.zip
C:\Apps\Python25\DLLs
C:\Apps\Python25\lib
C:\Apps\Python25\lib\plat-win
C:\Apps\Python25\lib\lib-tk
C:\Apps\Python25
C:\Apps\Python25\lib\site-packages
C:\Apps\Python25\lib\site-packages\PIL
C:\Apps\Python25\lib\site-packages\win32
C:\Apps\Python25\lib\site-packages\win32\lib
C:\Apps\Python25\lib\site-packages\Pythonwin
C:\Apps\Python25\lib\site-packages\wx-2.8-msw-ansi

Searching these doesn't really take very long.  Remember that it doesn't
have to read all the files -- it only has to read the directories.

>'C:\Documents and Settings\User\My Documents\My Python files', 'C:\Documents
>and Settings\User\My Documents\My Python files\wxDemos'. Now \wxDemos\ is
>being searched very early.
>
>... no way! After running AnalogClock.py again, this error message appears:
>
>------------------------------------------
>Traceback (most recent call last):
>  File "C:\Documents and Settings\My Documents\My Python
>files\wxAnalogClock.py", line 14, in <module>
>    import wx
>ImportError: No module named wx.
>------------------------------------------
>
>Very strange! Because all this wx stuff IS IN the directory 'C:\Documents
>and Settings\User\My Documents\My Python files\wxDemos'. And AnalogClock.py
>does work when residing in that directory.

wxDemos contains the demos.  The "wx" module lives in
site-packages\wx-2.8-msw-ansi.  Did you leave that in?
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From arkanes at gmail.com  Wed Jan 24 14:55:20 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 24 Jan 2007 13:55:20 -0600
Subject: Type casting a base class to a derived one?
In-Reply-To: <1169667478.4910.52.camel@portable-evil>
References: <mailman.2571.1168518354.32031.python-list@python.org>
	<slrneqcgve.1n0.horpner@FIAD06.norwich.edu>
	<4866bea60701110641n5eb4cc57uf5967aebcfd7790d@mail.gmail.com>
	<1169664145.4910.22.camel@portable-evil>
	<4866bea60701241057t13776d34ya516c2c24e7119bb@mail.gmail.com>
	<1169667478.4910.52.camel@portable-evil>
Message-ID: <4866bea60701241155q43fedd8yea8efc1b410a69ec@mail.gmail.com>

On 1/24/07, Cliff Wells <cliff at develix.com> wrote:
> On Wed, 2007-01-24 at 12:57 -0600, Chris Mellon wrote:
>
> >
> > In Python, you can do this simply by re-assigning the __class__. I'm
> > not convinced that your type system makes sense, here though. Any
> > reasonable ORM should be able to persist and reload an object without
> > losing the type information. Perhaps it's just a blind spot in the way
> > I think about types. Assuming that the limitations of your ORM are
> > external and out of your control, I would still ensure that whatever
> > generic objects are being loaded from the ORM are converted into
> > "real" objects of the correct type as soon as possible. For example,
> > if you're persisting a file, you might just save the filename, and
> > your ORM might return a string of the filename. I would want to
> > convert that back into a file object ASAP, rather than writing all my
> > code to accept either a FLO or a string and converting then.
> >
> > If you know what to upcast something to, then you know what type it
> > is. If you know what type it is, then (in Python) you can simply
> > assume it is of that type.
>
> Probably being more specific would help in this case ;-)
>
> What I'm doing is implementing an object-publishing mechanism in my
> template engine (Breve).  The type decision isn't known until the moment
> of rendering (i.e. in the template itself).  Say for instance a set of
> records is pulled from the ORM (SQLAlchemy in this case) and that these
> records represent articles in a blog.  These records, until they hit the
> template, have no real representation in HTML.  The decision about how
> to present them is up to the template.  The dispatch mechanism I
> referred to earlier is a way that I allow users of the template system
> to register how a particular object should be rendered in HTML (a
> "flattener").  This allows commonly represented objects to be used
> without a lot of template clutter.
> However, if you consider the case of a blog, then if the template
> receives a list of articles, it would seem reasonable to present those
> articles in at least two ways: first as a table of contents in the page
> gutter, and then perhaps as two or three summaries in the main part of
> the page.  But this isn't known to the lower layers of the application,
> only to the template.  Therefore it would be nice if the template user
> could register two classes with the flattener, both representations of
> the original object but simply with a different type.
>
> I'll give a concrete example:
>
> class Person: # assume this is something from the ORM
>     name = "Kenny"
>
> class PersonRow ( Person ):
>     pass
>
> def flatten_person ( p ):
>     return "<span>omg, you've killed %p</span>" % p.name
>
> def flatten_personrow ( p ):
>     return "<tr><td>%s</td></tr>" % p.name
>
> register_flattener ( PersonRow, flatten_personrow )
> register_flattener ( Person, flatten_person )
>
>
> Now, assuming a list of Person records were passed in as 'persons', then
> in the template the template author could simply use:
>
> div [
>     # show the first person
>     persons [ 0 ],
>
>     # show a table of all persons
>     table [
>         [ PersonRow ( p ) for p in persons ]
>     ]
> ]
>
>
> > What you're describing is a disjoint between your actual type system
> > (that is, the one you have in code) and your theoretical type system
> > (the one that you model your code around). To me, this is a huge red
> > warning flag.
>
> What I'm describing is a disjoint between how I want my template engine
> to be used (I tend to build backwards, writing the desired template code
> and then the engine code to support that use) and what can be easily and
> efficiently achieved.  But yes, in a way you are correct since my
> theoretical type system is constrained by Python's type system (Breve
> templates are Python expressions).
>
> That being said, I'm certain I'll come up with a solution that doesn't
> bug me too much, it's just that the "obvious" solution doesn't exist
> (type casting).
>

When I look at this, I don't see type casting as the obvious solution
- PersonRow isn't a subclass of Person, it's a subclass of Row. The
way you actually write it (constructing a PersonRow with a person) is
exactly how I would actually implement it though, except I wouldn't
see it as a "typecast" any more than I see creating a file object from
a filename as a typecast. I see it as a construction. I might
implement PersonRow as:

class PersonRow(Row):
    def __init__(person):
        self.person = person #assumed to be a Person object
    def flatten(self):
        return "<tr><td>%s></tr></td>" % self.person.name


Of course, when types are just callables that return instances the
distinction between construction and typecasting becomes purely
semantic. So the real confusion here may simply be how one refers to
an operation, rather than the operation itself.


From __peter__ at web.de  Wed Jan 10 05:20:33 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 10 Jan 2007 11:20:33 +0100
Subject: convert binary data to int
References: <1168424278.193439.216770@k58g2000hse.googlegroups.com>
Message-ID: <eo2eld$8ic$02$1@news.t-online.com>

rubbishemail at web.de wrote:

> I need to convert a 3 byte binary string like
> "\x41\x00\x00" to 3 int values ( (65,0,0) in this case).
> The string might contain characters not escaped with a \x, like
> "A\x00\x00"

>>> [ord(c) for c in "A\x00\x41"]
[65, 0, 65]

For more complex conversions look into the struct module.

Peter


From garyjefferson123 at yahoo.com  Thu Jan 25 01:54:46 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: 24 Jan 2007 22:54:46 -0800
Subject: selective logger disable/enable
In-Reply-To: <1169546484.370874.253890@a75g2000cwd.googlegroups.com>
References: <1169190498.593059.238150@q2g2000cwa.googlegroups.com>
	<1169204564.348768.186900@38g2000cwa.googlegroups.com>
	<1169349399.938121.238430@38g2000cwa.googlegroups.com>
	<1169395276.181654.160810@a75g2000cwd.googlegroups.com>
	<1169437763.213781.163660@38g2000cwa.googlegroups.com>
	<1169442596.209314.162410@s34g2000cwa.googlegroups.com>
	<1169531341.221067.205500@11g2000cwr.googlegroups.com>
	<1169546484.370874.253890@a75g2000cwd.googlegroups.com>
Message-ID: <1169708086.661248.142390@j27g2000cwj.googlegroups.com>

So maybe I don't have all this figured out quite as well as I thought.
What I really want to do is set an environment variable, MYDEBUG, which
contains a list of wildcarded logger names, such as "a.*.c a.d" (which
becomes ['a.*.c', 'a.d'], and then selectively crank the loglevel up to
DEBUG for those that match.

In order to do that, I think I need something kind of like filters, but
for logger name... I'm not seeing how to do this, even after playing
with variations of test15, 18, and 21.

What I do have working at the moment is passing a list of non-wildcard
logger names, i.e., doing the wildcard expansion manually such as
"['a.b.c', 'a.c.c', 'a.f.c', 'a.d'].  Is there anyway to automate this
dynamically?

BTW, I do understand that 'a.d' is essentially equivalent to 'a.d.*',
but I'm dealing with a hierarchy that doesn't always tidy up like that.
 For example, I have top.network.server.http, top.network.server.smtp,
top.network.client.http, and top.network.client.smtp.  Obviously, if I
only want server or client DEBUG msgs, this is easy.  And sometimes
that's exactly what I want.  Other times, I want only smtp DEBUG msgs,
and the hierarchy won't help me get that (unless I break it for just
getting client or server msgs), etc.  So I would really like to figure
out how to do 'a.*.c'.

Any ideas?

Thanks again,
Gary


On Jan 23, 3:01 am, "Vinay Sajip" <vinay_sa... at yahoo.co.uk> wrote:
> Glad the tests/examples (log_testxx.py) helped. When I get a
> chance, I will try to work some of them into the docs...
> 
> Best regards,
> 
> Vinay Sajip



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Jan 12 11:56:09 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 12 Jan 2007 17:56:09 +0100
Subject: modules...n methods
References: <1168620496.520506.296330@q2g2000cwa.googlegroups.com>
Message-ID: <50pst9F1h5hj5U1@mid.individual.net>

lee wrote:

> whats the way to read the sourcecode of methods

Easy. Look up the .py file and open it in an editor of your choice.
Those files are, for example, in "/usr/lib/python".

> and built in functions?

Get your python interpreter's source code and look up the functions
there.

Regards,


Bj?rn

-- 
BOFH excuse #370:

Virus due to computers having unsafe sex.



From skip at pobox.com  Fri Jan 12 17:38:42 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 12 Jan 2007 16:38:42 -0600
Subject: Portable Python - free portable development environment !
In-Reply-To: <1168639781.763133.319580@s34g2000cwa.googlegroups.com>
References: <1168533423.224355.221390@k58g2000hse.googlegroups.com>
	<mailman.2598.1168551029.32031.python-list@python.org>
	<1168639781.763133.319580@s34g2000cwa.googlegroups.com>
Message-ID: <17832.3570.698257.111981@montanaro.dyndns.org>


    perica> but this is first release and I have big plans ;)

Including maybe other platforms than Windows?

Skip


From danielkleinad at gmail.com  Fri Jan 19 12:03:33 2007
From: danielkleinad at gmail.com (Daniel Klein)
Date: Fri, 19 Jan 2007 17:03:33 GMT
Subject: Match 2 words in a line of file
References: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
	<1169166223.073714.109620@51g2000cwl.googlegroups.com>
	<1169172293.938820.103400@51g2000cwl.googlegroups.com>
	<1169172954.107365.133950@51g2000cwl.googlegroups.com>
	<1169175299.490994.244700@51g2000cwl.googlegroups.com>
Message-ID: <e3u1r25m8pnjfufna41lu4tjvq1uspeh3o@4ax.com>

On 18 Jan 2007 18:54:59 -0800, "Rickard Lindberg"
<ricli576 at student.liu.se> wrote:

>I see two potential problems with the non regex solutions.
>
>1) Consider a line: "foo (bar)". When you split it you will only get
>two strings, as split by default only splits the string on white space
>characters. Thus "'bar' in words" will return false, even though bar is
>a word in that line.
>
>2) If you have a line something like this: "foobar hello" then "'foo'
>in line" will return true, even though foo is not a word (it is part of
>a word).

1) Depends how you define a 'word'.

2) This can be resolved with

templine = ' ' + line + ' '
if ' ' + word1 + ' ' in templine and ' ' + word2 + ' ' in templine:


Dan


From ptmcg at austin.rr._bogus_.com  Mon Jan  1 19:43:32 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 1 Jan 2007 18:43:32 -0600
Subject: Writing more efficient code
References: <mailman.2185.1167676577.32031.python-list@python.org>
Message-ID: <4599aab4$0$18074$4c368faf@roadrunner.com>

"gonzlobo" <gonzlobo at gmail.com> wrote in message 
news:mailman.2185.1167676577.32031.python-list at python.org...
> Greetings, and happyNewYear to all.
>
> I picked up Python a few weeks ago, and have been able to parse large
> files and process data pretty easily, but I believe my code isn't too
> efficient. I'm hoping dictionaries will help out, but I'm not sure the
> best way to implement them.
>
> I've been using a bunch of nested if/elif/else statements to select
> slices (0317 & 03de) from a file, then parse the data (aa, hh, bb,
> d2-d9) into parameters (a = airspeed, h = heading) & flags.
>
> #sample file contents
> 0000007d 03 0317 aa aa aa aa aa hh hh hh bb bb
> 0000007e 06 03de d2 d3 d4 d5 d6 d7 d8 d9 10 11
>
> # some pseudo code
> if PID == '03de':
>    flapsCmd = int(d3, 16)
>   if flapsCmd == 0xc0:
>      <flaps up code>
>   elif flapsCmd == 0x03:
>      <flaps down code>
> if PID == '0317':
>   airspeed == 'combine aa for airspeed & multiply by 0.1'
>   heading == 'combine hh for heading'
>   mach == 'combine bb for mach & multiply by 0.01'
>
> Might dictionaries help in this case... say Label0317(parameterName,
> slice (d3), scaleFactor(0.1))... I'd like to use them if they'll
> replace the dozens of nested conditionals.  I have roughly 75
> different parameters to decode from a file containing ~2.5 million
> lines of data.
>
> I know my pseudo code lacks details, but hopefully I'm getting my
> point across...
>
> (I suppose switch/select/case statements would help a bit, but python
> doesn't seem to use them... not to start a religious war or anything).
>
> Any help (or encouragement) is appreciated.

First, your data is so regularly formatted, I suspect you are using the 
split() method of string to get at the pieces.  Good, this keeps things 
simple.

It *would* help if you posted actual data lines, instead of aa's, and bb's. 
So I took a guess that these were hex representations of characters 
representing decimal numbers.

Instead of switch/case, I selected a dict that creates a dispatch table, 
selecting one of several object classes whose __init__ constructors are 
written to pick apart the relevant fields from the 10-element list following 
the 4-digit selection code.  I then just created an object dumping method to 
show what objects were created from what lines of data, and perhaps you can 
take it from there.

-- Paul


test = """\
0000007d 03 0317 30 33 32 38 38 32 37 35 34 31
0000007e 06 03de af c0 fe d5 d6 d7 d8 d9 10 11
0000007e 06 junk af c0 fe d5 d6 d7 d8 d9 10 11
0000007f 06 03de af 03 fe d5 d6 d7 d8 d9 10 11"""

hex2int = lambda hh : int(hh,16)
class AirspeedHeadingMach(object):
    def __init__(self,datalist):
        self.airspeed = int("".join(map(chr,map(hex2int,datalist[:5]))))*0.1
        self.heading = "".join(map(chr,map(hex2int,datalist[5:8])))
        self.mach = int("".join(map(chr,map(hex2int,datalist[8:]))))*0.01

UP,DOWN = 0,1
class FlapsStatus(object):
    def __init__(self,datalist):
        self.flaps = { 0xc0:UP, 0x03:DOWN } [ int(datalist[1],16) ]

class UnknownRec(object):
    def __init__(self,code,datalist):
        self.code = code
        self.datalist = datalist[:]

def dump(o):
    print o.__class__.__name__
    print o.__dict__
    print

recCodeTypeMap = {
    '0317' : AirspeedHeadingMach,
    '03de' : FlapsStatus,
    }
for line in test.split("\n"):
    toks = line.split()
    code = toks[2]
    datalist = toks[3:]
    if code in recCodeTypeMap:
        dataObject = recCodeTypeMap[code](datalist)
    else:
        dataObject = UnknownRec(code,datalist)
    dump(dataObject)

Prints:
AirspeedHeadingMach
{'mach': 0.41000000000000003, 'airspeed': 328.80000000000001, 'heading': 
'275'}

FlapsStatus
{'flaps': 0}

UnknownRec
{'datalist': ['af', 'c0', 'fe', 'd5', 'd6', 'd7', 'd8', 'd9', '10', '11'], 
'code': 'junk'}

FlapsStatus
{'flaps': 1}






From pwatson at redlinepy.com  Wed Jan  3 22:23:11 2007
From: pwatson at redlinepy.com (Paul Watson)
Date: Wed, 03 Jan 2007 21:23:11 -0600
Subject: Cannot build 2.5 on FC6 x86
In-Reply-To: <459c0ac1$0$28366$9b622d9e@news.freenet.de>
References: <502e72F1eh7ngU1@mid.individual.net>
	<459c0ac1$0$28366$9b622d9e@news.freenet.de>
Message-ID: <503a8vF1d8dn2U1@mid.individual.net>

Martin v. L?wis wrote:
> Paul Watson schrieb:
>> ./configure
>> make
>> make test
>>
>> The result appears to hang after the test_tkl... line.  I had to kill
>> the 'make test' process which terminated it.  Any suggestions?
> 
> There isn't (or shouldn't be) any "test_tkl..." line. What precisely
> was the line, and how long did you wait until you thought it hangs?
> 
> Regards,
> Martin

Sorry, I mis-typed.  It is not test_tkl.  It was test_tcl...

The last line output was as shown below my mistyping.

I let it sit overnight one time.


From weekender_ny at yahoo.com  Sat Jan 13 23:49:39 2007
From: weekender_ny at yahoo.com (John)
Date: 13 Jan 2007 20:49:39 -0800
Subject: Threaded for loop
In-Reply-To: <7xr6ty8ugv.fsf@ruckus.brouhaha.com>
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
	<7xr6ty8ugv.fsf@ruckus.brouhaha.com>
Message-ID: <1168750177.856791.85730@s34g2000cwa.googlegroups.com>


Damn! That is bad news. So even if caclulate is independent for (i,j)
and
is computable on separate CPUs (parts of it are CPU bound, parts are IO
bound)
python cant take advantage of this?

Surprised,
--Tom

Paul Rubin wrote:
> "John" <weekender_ny at yahoo.com> writes:
> > I want to do something like this:
> >
> > for i = 1 in range(0,N):
> >  for j = 1 in range(0,N):
> >    D[i][j] = calculate(i,j)
> >
> > I would like to now do this using a fixed number of threads, say 10
> > threads. What is the easiest way to do the "parfor" in python?
>
> It won't help in terms of actual parallelism.  Python only lets one
> thread run at a time, even on a multi-cpu computer.



From danb_83 at yahoo.com  Thu Jan 11 22:44:06 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 11 Jan 2007 19:44:06 -0800
Subject: dot operations
In-Reply-To: <mailman.2582.1168532497.32031.python-list@python.org>
References: <1168511200.252193.132340@p59g2000hsd.googlegroups.com>
	<eo548v$mr4$1@news.albasani.net>
	<mailman.2582.1168532497.32031.python-list@python.org>
Message-ID: <1168573446.592441.245490@38g2000cwa.googlegroups.com>

On Jan 11, 10:21 am, "Steven W. Orr" <ste... at syslang.net> wrote:
> On Thursday, Jan 11th 2007 at 11:41 +0100, quoth robert:
>
> =>jm.sur... at no.spam.gmail.com wrote:=>> Hi,
> =>>  Frequently I get to do like this:
> =>> a = (1, 2, 3, 4) # some dummy values
> =>> b = (4, 3, 2, 1)
> =>> import operator
> =>> c = map(operator.add, a, b)
> =>>
> =>> I am finding the last line not very readable especially when I combine
> =>> couple of such operations into one line. Is it possible to overload
> =>> operators, so that, I can use .+ for element wise addition, as,
> =>> c = a .+ b
> =>> which is much more readable.
> =>>
> =>> Similarly, I want to use .- , .*, ./   . Is it possible to do?
> =>
> =>import numpy
> =>
> =>You'll not even need dots
>
> I'm very new so my plea to be gentle is still on.
>
> I just looked at the numpy package. Seems very cool, but for the life of
> me I didn't understand the method by which python allows for creation of
> infix operators. Can someone please explain or point me to a reference?

Python doesn't allow the creation of new operators, but you can
overload the existing ones (except for "and" and "or").  This is done
by implementing the methods __add__, __sub__, __mul__, etc.

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



From deets at nospam.web.de  Tue Jan 30 02:54:52 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 30 Jan 2007 08:54:52 +0100
Subject: Executing Javascript, then reading value
In-Reply-To: <1170103447.839304.44900@v33g2000cwv.googlegroups.com>
References: <1170103447.839304.44900@v33g2000cwv.googlegroups.com>
Message-ID: <528bv4F1n73scU1@mid.uni-berlin.de>

Melih Onvural schrieb:
> I need to execute some javascript and then read the value as part of a 
> program that I am writing. I am currently doing something like this:
> 
> import htmllib, urllib, formatter
> 
> class myparser(htmllib.HTMLParser):
> 	insave = 0
> 	def start_div(self, attrs):
> 		for i in attrs:
> 			if i[0] == "id" and i[1] == "pr":
> 				self.save_bgn()
> 				self.insave = 1
> 
> 	def end_div(self):
> 		if self.insave == 1:
> 			print self.save_end()
> 		self.insave = 0
> 
> parser = myparser(formatter.NullFormatter())
> 
> #def getPageRank(self, url):
> try:
> 	learn_url = "http://127.0.0.1/research/getPageRank.html?q=http://
> www.yahoo.com&"
> 	pr_url = urllib.urlopen(learn_url)
> 	parser.feed(pr_url.read())
> except IOError, e:
> 	print e
> 
> but the result is the javascript function and not the calculated 
> value. Is there anyway to get the javascript to execute first, and 
> then return to me the value? thanks in advance,

Do it in a browser. There are ways to automate one, for example the 
webbrowser module, and others.

Then rework your script to work with AJAX.

Diez


From streamservenl at gmail.com  Wed Jan 31 09:25:35 2007
From: streamservenl at gmail.com (jvdb)
Date: 31 Jan 2007 06:25:35 -0800
Subject: Help needed on config files
In-Reply-To: <1170237893.930122.138300@v45g2000cwv.googlegroups.com>
References: <1170237893.930122.138300@v45g2000cwv.googlegroups.com>
Message-ID: <1170253533.873819.115130@p10g2000cwp.googlegroups.com>

Yes! That does the trick, thanks, both of you!



From stephan.diehl at gmx.net  Mon Jan 29 12:32:23 2007
From: stephan.diehl at gmx.net (Stephan Diehl)
Date: Mon, 29 Jan 2007 18:32:23 +0100
Subject: next berlin python-group meeting fr., 2.2.
In-Reply-To: <eplam5$sgv$01$1@news.t-online.com>
References: <eplam5$sgv$01$1@news.t-online.com>
Message-ID: <eplb34$sgv$01$3@news.t-online.com>

Stephan Diehl wrote:

> http://starship.python.net/cgi-bin/mailman/listinfo/python-berlin

argghhh, wrong link. please try
http://starship.python.net/mailman/listinfo/python-berlin


From gagsl-py at yahoo.com.ar  Fri Jan 26 05:34:52 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 26 Jan 2007 07:34:52 -0300
Subject: how to remove c++ comments from a cpp file?
In-Reply-To: <1169805244.879280.235660@v45g2000cwv.googlegroups.com>
References: <1169801197.941449.303000@v33g2000cwv.googlegroups.com>
	<mailman.3190.1169802638.32031.python-list@python.org>
	<1169805244.879280.235660@v45g2000cwv.googlegroups.com>
Message-ID: <7.0.1.0.0.20070126071436.0455d118@yahoo.com.ar>

At Friday 26/1/2007 06:54, Frank Potter wrote:

>[CODE]
>import re
>
>f=open("show_btchina.user.js","r").read()
>f=unicode(f,"utf8")
>
>r=re.compile(ur"//[^\r\n]+$", re.UNICODE|re.VERBOSE)
>f_new=r.sub(ur"",f)
>
>open("modified.js","w").write(f_new.encode("utf8"))
>[/CODE]
>
>And, the problem is, it seems that only the last comment is removed.
>How can I remove all of the comments, please?

Note that it's not as easy as simply deleting from // to end of line, 
because those characters might be inside a string literal. But if you 
can afford the risk, this is a simple way without re:

f = open("show_btchina.user.js","r")
modf = open("modified.js","w")
for line in f:
     uline=unicode(line,"utf8")
     idx = uline.find("//")
     if idx==0:
         continue
     elif idx>0:
         uline = uline[:idx]+'\n'
     modf.write(uline.encode("utf8"))
modf.close()
f.close()


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From saluk64007 at gmail.com  Sat Jan  6 14:13:34 2007
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sat, 6 Jan 2007 11:13:34 -0800
Subject: still struggling, howto use a list-element as a name ?
In-Reply-To: <c3f69bf60701061111t11615769p90ef2c2d713bd9ad@mail.gmail.com>
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
	<c3f69bf60701061111t11615769p90ef2c2d713bd9ad@mail.gmail.com>
Message-ID: <c3f69bf60701061113g14376addw209b313b71938523@mail.gmail.com>

You would use setattr to bind a name that you don't know:

for pin in self.pin:
   setattr(self,pin.Name,pin.Value)

However, I'm not sure why you're using a dictionary in this way.  I don't
totally understand the context, so I may be wrong, but I would code it more
like this:

class Power_Supply(device):
   pins = {'GND':(_DIG_OUT,_par2),'VCC':(_DIG_OUT,_par33)}
   def __init__(self):
      for pin in pins.items():   #pin will be key,value
         setattr(self,pin[0],pin[1])

or even:

class Power_Supply(device):
   pins = {'GND':(_DIG_OUT,_par2),'VCC':(_DIG_OUT,_par33)}
   def __init__(self):
      self.__dict__.update(pins)
#self.__dict__ is the name mapping for any object, update will insert any
new values from a new dictionary into the old one
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070106/dcc17142/attachment.html>

From larry.bates at websafe.com  Thu Jan 11 18:37:41 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 11 Jan 2007 17:37:41 -0600
Subject: Is there a good example on instantiating, calling, using, an
	API from Python on Windows?
In-Reply-To: <1168541166.457806.133320@p59g2000hsd.googlegroups.com>
References: <1168541166.457806.133320@p59g2000hsd.googlegroups.com>
Message-ID: <45A6CA45.3000300@websafe.com>

kj7ny wrote:
> Is there a good example on instantiating, calling, using, etc., an API
> from Python?
>
> I need to use Python to talk to another system through that system's
> API's on Windows XP.
>
> Can you point me to documentation and/or a good example of Python using
> 3rd party API's? (Preferably a good example rather than just
> documentation.)
>
> And, can I do this from Python 2.4.# or should I try to learn how to
> use Iron Python?  (By the way, if the examples could be for python
> 2.4.# it would be preferable.)
>
> Thanks,
>

When you say API what EXACLY do you mean.  Is it a .DLL that you
need to call (if so see ctypes module) or a COM API (if so see
win32 module)?  Other APIs could use sockets, pipes, etc.  you will
need to give us more to be able to help.

-Larry


From metsakuri at gmail.com  Thu Jan  4 04:35:38 2007
From: metsakuri at gmail.com (tonisk)
Date: 4 Jan 2007 01:35:38 -0800
Subject: pow() works but sqrt() not!?
In-Reply-To: <enig9a$cncb$1@zam602.zam.kfa-juelich.de>
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
	<1167899693.759071.51450@31g2000cwt.googlegroups.com>
	<enig9a$cncb$1@zam602.zam.kfa-juelich.de>
Message-ID: <1167903337.816250.196540@51g2000cwl.googlegroups.com>

> >if you want math functions to your current namespace use:
> >>> from math import *What is a "namespace" and what is the difference between ">>>import math"
> and ">>>from math import *" ?

for namespaces read this
http://www.network-theory.co.uk/docs/pytut/tut_68.html

import math creates new namespace "math" for names in that module, so
you can acess them by prefixing them with "math", like math.sqrt(9).
from math import * imports all names to your local scope, so you do not
have to prefix them, sqrt(9)

-- 
T?nis



From gagsl-py at yahoo.com.ar  Thu Jan 18 21:29:07 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 18 Jan 2007 23:29:07 -0300
Subject: More M2Crypto issues
In-Reply-To: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>
References: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>
Message-ID: <7.0.1.0.0.20070118225626.01d2f6f8@yahoo.com.ar>

At Thursday 18/1/2007 04:41, John Nagle wrote:

>    I've been running M2Crypto successfully using Python 2.4 on Windows 2000,
>and now I'm trying to get it to work on Python 2.3.4 on Linux.
>
>    Attempting to initialize a context results in
>
>Traceback (most recent call last):
>    File "/www/htdocs/sitetruth.com/cgi/ratingdetails.cgi", line 46, in ?
>      DetailsPageBuilder.detailspage(kdbfile,ktemplatefile,url)  # check and
>display domain or URL as web page
>    File "./sitetruth/DetailsPageBuilder.py", line 70, in detailspage
>      sitecert = InfoSSL2.Certificate(siteinfo, kverifylocations, verbose)
>    File "./sitetruth/InfoSSL2.py", line 147, in __init__
>      self.ctx = createsslcontext(trustedcafile, verbose)        # 
> Generate general SSL
>context
>    File "./sitetruth/InfoSSL2.py", line 40, in createsslcontext
>      ctx = 
> SSL.Context('sslv3') 
>   # Create context with SSL params
>    File "/home/sitetruth/lib/python/M2Crypto/SSL/Context.py", line 
> 43, in __init__
>      map()[long(self.ctx)] = self
>ValueError: invalid literal for long(): _480e1008_p_SSL_CTX

On a previous version of M2Crypto that line said: map()[self.ctx] = 
self, and that failed too ("unhashable object", I think).
I changed the class _ctxmap (the map() above returns an instance of 
it) to use str(key) in the 3 places it was used. (That would be 
equivalent to use str(self.ctx) everywhere, instead of long(self.ctx) 
as your traceback is showing). All I can say is that no error 
happened afterwards, but I don't know if that broke something. (and I 
didn't care at the moment, I only needed a Zope instance running on 
Windows with SSL for less than a week - and if it were "cheating SSL" 
it was OK for me then)

>     which, when I look at the code and try some test cases, seems
>legitimate.  The cacheing code is trying to convert a reference to an
>object (a C object, in fact) into a "long".  Python 2.4 on Windows
>will do that.  Python 2.3.4 on Linux converts it to a string first,
>gets "_480e1008_p_SSL_CTX", and then tries to convert that to an
>integer, which fails.

So using str() appears, at least on the surface, to be reasonable. 
But someone with more intimate knowledge of the library should 
confirm that. I don't even understand what's the point for the 
_ctxmap singleton - it's the same thing as a global dictionary, isn't it?


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From http  Sun Jan  7 10:27:22 2007
From: http (Paul Rubin)
Date: 07 Jan 2007 07:27:22 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
	<7xd55rzke9.fsf@ruckus.brouhaha.com>
	<slrneq2055.tcj.grahn+nntp@frailea.sa.invalid>
	<mailman.2388.1168181437.32031.python-list@python.org>
Message-ID: <7x3b6mzwkl.fsf@ruckus.brouhaha.com>

Thomas Ploch <Thomas.Ploch at gmx.net> writes:
> Me neither, although I have to say that the '__' prefix comes pretty
> close to being 'private' already. It depends on the definition of
> private. For me, private means 'not accessible from outside the
> module/class'.

    class A:
      __x = 3

    class B(A):
      __x = 4   # ok

    class C(B):
      __x = 5   # oops!

Consider that the above three class definitions might be in separate
files and you see how clumsy this gets.  


From facundo at taniquetil.com.ar  Fri Jan 26 11:16:28 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Fri, 26 Jan 2007 16:16:28 +0000 (UTC)
Subject: Right-Justifying Numeric Output
References: <Pine.LNX.4.64.0701251343070.15822@salmo.appl-ecosys.com>
Message-ID: <epd9gr$sdi$1@sea.gmane.org>

Rich Shepard wrote:


> print '%2d   $%11.2f  $%10.2f  $%9.2f  $%9.2f' %(nper, pv, diff, ten, bonus)
>
> and I would like to have the output right justified in the specified field.

>>> "%7.2f..%5d"  % (2.3, 78)
'   2.30..   78'
>>> "%-7.2f..%-5d"  % (2.3, 78)
'2.30   ..78   '

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From steve at REMOVEME.cybersource.com.au  Mon Jan 29 20:52:02 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 30 Jan 2007 12:52:02 +1100
Subject: Random passwords generation (Python vs Perl) =)
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
	<1170064302.264009.12650@p10g2000cwp.googlegroups.com>
	<7xveiqapwi.fsf@ruckus.brouhaha.com>
	<1170082420.420688.109910@l53g2000cwa.googlegroups.com>
	<mailman.3269.1170084263.32031.python-list@python.org>
Message-ID: <pan.2007.01.30.01.52.00.847308@REMOVEME.cybersource.com.au>

On Mon, 29 Jan 2007 16:24:18 +0100, Laszlo Nagy wrote:

> NoName ?rta:
>> Hmmm..
>> In the Perl example password generates after user hit ENTER not 
>> continously like in Python you wrote... :)
>>
>> i want see various ways to generate passwords even if they some 
>> indirect like using BASE64
>>   
> I copied this from a recipe, I do not remember which one. I like it very 
> much because it creates password that are easy to type in. You can type 
> every odd letter with your left hand and every even letter with your 
> right hand.

That weakens the password significantly. For a six character alpha-numeric
password with no special characters, you have (26*2+10)**6 possible
passwords, or 56,800,235,584.

Using your password generator, you have:

>>> righthand = '23456qwertasdfgzxcvbQWERTASDFGZXCVB'
>>> lefthand = '789yuiophjknmYUIPHJKLNM'
>>> len(righthand)
35
>>> len(lefthand)
23

and therefore only:

35*23*35*23*35*23 = (35*23)**3 = 521,660,125

possible passwords. That's about one percent of the earlier figure, so
you lose about 99% of the strength of the password. For eight character
passwords the difference is even more dramatic: you reduce the strength of
the password by a factor of roughly 99,999,995/100,000,000.

In my opinion, if you're going to accept such a drastic reduction in
password strength, better to go for a password that is easier to memorise
than a hard-to-memorise-but-easy-to-type weak password.

Here's one such algorithm:

* think of a meaningful phrase you won't forget: e.g. "Snow White and the
Seven Dwarves"

* take the first letter of each word: "swatsd" 

* mix up the capitals and make it leet: "5Wat7D"

* add some special characters if you can: "5W&t7D"

* if it is not long enough, add a suffix or prefix or both: "p5W&t7D."

And now you have a strong password that you can remember but is unlikely
to be guessed.



-- 
Steven D'Aprano 



From cjw at sympatico.ca  Fri Jan 26 02:55:48 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 26 Jan 2007 02:55:48 -0500
Subject: how to unistall a Python package?
In-Reply-To: <000601c74094$4d514e20$1400a8c0@mytomato>
References: <epad97$fhqb$1@zam602.zam.kfa-juelich.de>
	<000601c74094$4d514e20$1400a8c0@mytomato>
Message-ID: <epcc69$55f$1@sea.gmane.org>

With Windows, a few packages, eg. PythonWin, also modify the registry. 
numpy, the elaboration of numarray/numeric, and PythonWin have 
RemoveXXX.exe in C:\Python25.

I don't know whether this is the standard approach.  There doesn't seem 
to be a reference to Removal in the distutils document.

Colin W.

Wang Shuhao wrote:
> Third party packages are put into $PYTHONHOME\Lib\site-packages after been installed, so to uninstall them, just go there and delete the directory contains all files of your package.
> 
> 
> ----- Original Message ----- 
> From: "siggi" <smusnmrNOSPAM at yahoo.com>
> Newsgroups: comp.lang.python
> To: <python-list at python.org>
> Sent: Thursday, January 25, 2007 10:02 PM
> Subject: how to unistall a Python package?
> 
> 
>> Hi all,
>>
>> installing a package with 'setup.py' is easy. But how do I uninstall the
>> package, once I want to get rid of it again?
>>
>> Thanks,
>>
>> siggi
>>
>>
>>
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
>>



From jstroud at mbi.ucla.edu  Tue Jan 30 19:49:20 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 30 Jan 2007 16:49:20 -0800
Subject: data design
In-Reply-To: <1170201274.580256.182740@v45g2000cwv.googlegroups.com>
References: <45bf5763$0$22792$426a34cc@news.free.fr>
	<1170183985.871094.155720@q2g2000cwa.googlegroups.com>
	<45bfbcc3$0$30950$426a74cc@news.free.fr>
	<1170201274.580256.182740@v45g2000cwv.googlegroups.com>
Message-ID: <epop2g$b2d$1@zinnia.noc.ucla.edu>

Szabolcs Nagy wrote:
>>Hurray for yaml! A perfect fit for my need! And a swell tool!
>>Thanks a lot!
> 
> 
> i warn you against yaml
> it looks nice, but the underlying format is imho too complex (just 
> look at their spec.)
> 
> you said you don't want python source because that's too complex for 
> the users.
> i must say that yaml is not easier to use than python data structures.
> 
> if you want userfriedly config files then ConfigParser is the way to 
> go.
> 
> if you want somthing really simple and fast then i'd recommend s-
> expressions of lisp
> 
> also here is an identation based xml-like tree/hierarchical data 
> structure syntax:
> http://www.scottsweeney.com/projects/slip/
> 

I've been spending the last 2 days weighing ConfigParser and yaml, with 
much thought and re-organizing of each file type. The underlying 
difference is that, conceptually, ini files are an absurdly limited 
subset of yaml in that ini files are basically limited to a map of a map.

For instance, I have a copy_files section of a configuration. In order 
to know what goes with what you have to resort to gymnastics with the 
option names

[copy_files]
files_dir1 = this.file that.file
path_dir1 = /some/path

files_dir2 = the_other.file yet_another.file
path_dir2 = /some/other/path

In yaml, it might look thus.

copy_files :
      - files : [this.file, that.file]
        path  : /some/path
      - files : [the_other.file, yet_another.file]
        path  : /some/other/path

Both are readable (though I like equals signs in appearance over 
colons), but yaml doesn't require a lot of string processing to group 
the files with the paths. I don't even want to think the coding 
gymnastics required to split all of the option names and then group 
those with common suffixes.

Now if the config file were for copying only, ini would be okay, because 
one could just have sections that group paths and dirs:

[dir1]
files = this.file, that.file
path = /some/path

[dir2]
...

But if you need different kinds of sections, you have outgrown ini.

In essence, ini is limited to a single dictionary of dictionaries while 
yama can express pretty much arbitrary complexity.

James


From kloro2006 at gmail.com  Sun Jan 28 16:14:48 2007
From: kloro2006 at gmail.com (kloro)
Date: 28 Jan 2007 13:14:48 -0800
Subject: working model of a microcoded computer
Message-ID: <1170018888.634619.289950@s48g2000cws.googlegroups.com>

This is somewhat off topic, but I think many programmers would be
interested to look at a working model of a microcoded computer at:

        tomspages.com

click on the link for 'Hack the Com puter Model.' It conveys among 
other
things the physical events that underlie execution of a microcode
instruction and, by extension, of machine language.

I would like very much to get people's feedback on the thing.

Thanks,

tom arnall
north spit, ca
usa



From ajsiegel at optonline.com  Mon Jan  8 10:40:59 2007
From: ajsiegel at optonline.com (ajsiegel at optonline.com)
Date: 8 Jan 2007 07:40:59 -0800
Subject: Xah's Edu Corner: Introduction to 3D Graphics Programing
References: <1166836083.084101.25870@73g2000cwn.googlegroups.com>
	<458d7899$0$8725$ed2619ec@ptn-nntp-reader02.plus.net>
	<1167208399.089326.213540@a3g2000cwd.googlegroups.com>
	<1167230356.551596.193550@73g2000cwn.googlegroups.com>
	<1167255574.202660.176530@48g2000cwx.googlegroups.com>
Message-ID: <1168270858.969940.282070@42g2000cwt.googlegroups.com>

Xah Lee wrote:
> Here's their license:
> http://www.vpython.org/webdoc/visual/license.txt
>
> I read it wrong before.
> Thanks for correction.
>
> This is superb! I'll be looking into vpython!
>
>  Xah

Of course it does what it does by resort to OpenGL and C++, so is part
of the problem ;)

I am looking forward to your tutorial efforts, and hoping those efforts
can be accessed without exposure to too much polemics.  Though if that
is the price of admission, that is the price of admission.

BTW, VPython is most of the way through a 4.xxx release which provides
some nice additional functionality to the 3.xx series core - like
transparency and texturing.  Problem being the the lead developer has
graduated and moved on, and the NSF funding that had supported the
effort has run out.

And the core folks around the project are either science educators or
Python folks - there is little C++ expertise currently involved with
the project.

The project is looking for help.

Anyone willing to jump in should perhaps reply here or at:


visualpython-users at lists.sourceforge.net

Art



From dwoogle at gmail.com  Wed Jan  3 18:46:55 2007
From: dwoogle at gmail.com (dwelden)
Date: 3 Jan 2007 15:46:55 -0800
Subject: Sorting on multiple values, some ascending, some descending
In-Reply-To: <1167852652.416990.158610@k21g2000cwa.googlegroups.com>
References: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
	<1167852652.416990.158610@k21g2000cwa.googlegroups.com>
Message-ID: <1167868015.112325.219410@i80g2000cwc.googlegroups.com>

> The simplest way is to take advantage of sort-stability and do
> successive sorts.  For example, to sort by a primary key ascending and
> a secondary key decending:
>
>    L.sort(key=lambda r: r.secondary, reverse=True)
>    L.sort(key=lambda r: r.primary)
>
Excellent! That looks just like what I needed.

> A less general technique is to transform fields in a way that reverses
> their comparison order:
>
>   L.sort(key=lambda r: (-r.age, r.height))    # sorts descending age
> and ascending height
This one I had figured out, but could not see how to get it to work for
strings.

Much obliged.



From fredrik at pythonware.com  Thu Jan 11 08:36:04 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 11 Jan 2007 14:36:04 +0100
Subject: what is the idiom for copy lots of params into self?
References: <1168469214.452389.221180@p59g2000hsd.googlegroups.com><1168481112.291651.89300@i39g2000hsf.googlegroups.com>
	<1168520386.457345.23680@i39g2000hsf.googlegroups.com>
Message-ID: <eo5eg6$bmb$1@sea.gmane.org>

"Emin" <emin.shopper at gmail.com> wrote:

> What made me ask the question in my original post was not so much that
> I had to loop over the names I wanted to save, but whether it's okay to
> mess with self.__dict__ or if there is another way I should be
> assigning to self.

    http://effbot.org/pyref/setattr

</F> 





From Barry.Carroll at psc.com  Fri Jan 19 18:59:11 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Fri, 19 Jan 2007 15:59:11 -0800
Subject: OT Annoying Habits (Was: when format strings attack)
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A9D@eugsrv400.psc.pscnet.com>

> -----Original Message-----
> From: Aahz [mailto:aahz at pythoncraft.com]
> Sent: Friday, January 19, 2007 3:29 PM
> To: python-list at python.org
> Subject: Re: OT Annoying Habits (Was: when format strings attack)
> 
> In article <mailman.2917.1169243036.32031.python-list at python.org>,
> Carroll, Barry <Barry.Carroll at psc.com> wrote:
> >
> >Secondly, can someone point me to the Standard Usenet Convention that
> >mandates against top-posting.  This is not sarcasm; I would really
like
> >to see it.  
<<snip>>
> 
> Funny, I've been on Usenet for more than fifteen years, continuously
> (and long-windedly -- but that's another matter) and I've never seen a
> Usenet group where top-posting was standard.  Anyway, here's a good
> resource:
> 
> http://www.xs4all.nl/%7ewijnands/nnq/nquote.html
> --
> Aahz (aahz at pythoncraft.com)           <*>
> http://www.pythoncraft.com/
> 
> Help a hearing-impaired person: http://rule6.info/hearing.html

My thanks to Aahz and the others who responded.  I also did some
Googling on my own.  I found out that top-posting is the norm in the
e-mail world.  Bottom- and inline-posting are the norm in the newsgroup
world.  

So I concede the point, and I'm bottom-posting like a good citizen.  

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed





From kylotan at gmail.com  Thu Jan 11 07:16:39 2007
From: kylotan at gmail.com (Ben Sizer)
Date: 11 Jan 2007 04:16:39 -0800
Subject: Ref count oddness with embedded Python... memory leak?
Message-ID: <1168517799.771866.144660@77g2000hsv.googlegroups.com>

Here's my test-case:

#include <python.h>
int main(int argc, char *argv[])
{
	Py_Initialize(); Py_Finalize();
	Py_Initialize(); Py_Finalize();
	Py_Initialize(); Py_Finalize();
	Py_Initialize(); Py_Finalize();
	Py_Initialize(); Py_Finalize();
	return 1;
}

Here's my output, with Python 2.5 built in debug mode on WinXP, no
modifications:

[7438 refs]
[7499 refs]
[7550 refs]
[7601 refs]
[7652 refs]

Is this normal? It doesn't look very promising to me.

-- 
Ben Sizer



From tomas at fancy.org  Wed Jan  3 13:30:53 2007
From: tomas at fancy.org (Tom Plunket)
Date: Wed, 03 Jan 2007 10:30:53 -0800
Subject: list/dictionary as case statement ?
References: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
	<mailman.2232.1167806595.32031.python-list@python.org>
	<71pmp2tq1klma5urhkfiv8bpq6u8sgtj06@4ax.com>
	<501r8sF1dp76aU1@mid.individual.net>
Message-ID: <qhtnp25ulug79cg2d1mebucg2g6pd11ift@4ax.com>

Bjoern Schliessmann wrote:

> Intels aren't RISC, are they?

Not the ones in PCs.  The OP didn't specify the CPU that's being used,
however.


-tom!

-- 


From persed at princeton.edu  Mon Jan 22 14:44:01 2007
From: persed at princeton.edu (Per B.Sederberg)
Date: Mon, 22 Jan 2007 19:44:01 +0000 (UTC)
Subject: Program eating memory, but only on one machine? (Solved, sort of)
References: <mailman.2986.1169473883.32031.python-list@python.org>
	<c11f84-oo5.ln1@darkstargames.dnsalias.net>
	<loom.20070122T164112-825@post.gmane.org>
Message-ID: <loom.20070122T203730-966@post.gmane.org>

Per B.Sederberg <persed <at> princeton.edu> writes:

> I'll see if I can make a really small example program that eats up memory on
> our cluster.  That way we'll have something easy to work with.

Now this is weird.  I figured out the bug and it turned out that every time you
call numpy.setmember1d in the latest stable release of numpy it was using up a
ton of memory and never releasing it.

I replaced every instance of setmember1d with my own method below and I have
zero increase in memory.  It's not the most efficient of code, but it gets the
job done...


def ismember(a,b):
    ainb = zeros(len(a),dtype=bool)
    for item in b:
        ainb = ainb | (a==item)
    return ainb

I'll now go post this problem on the numpy forums.

Best,
Per






From arkanes at gmail.com  Tue Jan 16 12:31:35 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 16 Jan 2007 11:31:35 -0600
Subject: Check a windows service
In-Reply-To: <1168967374.568967.173690@11g2000cwr.googlegroups.com>
References: <1168966952.965088.17740@l53g2000cwa.googlegroups.com>
	<1168967374.568967.173690@11g2000cwr.googlegroups.com>
Message-ID: <4866bea60701160931g324777e1w7e5b0198a0cd24f4@mail.gmail.com>

On 16 Jan 2007 09:09:34 -0800, Tim Golden <tjgolden at gmail.com> wrote:
> awel wrote:
>
> > I'm new in python and I would like to know if it's possible to check if
> > a specific windows service is present and if it's possible how can I
> > do?
>
> This is one way:
>
> http://tgolden.sc.sabren.com/python/wmi_cookbook.html#automatic_services
>
> You'd have to change that example slightly, but I
> hope the principal is clear enough. If not, ask again.
>
> TJG
>

Here's some code cut & pasted from the demos included in the win32 module:

import win32service
import win32con


def EnumServices():
    resume = 0
    accessSCM = win32con.GENERIC_READ
    accessSrv = win32service.SC_MANAGER_ALL_ACCESS

    #Open Service Control Manager
    hscm = win32service.OpenSCManager(None, None, accessSCM)

    #Enumerate Service Control Manager DB

    typeFilter = win32service.SERVICE_WIN32
    stateFilter = win32service.SERVICE_STATE_ALL

    statuses = win32service.EnumServicesStatus(hscm, typeFilter, stateFilter)
    for (short_name, desc, status) in statuses:
        print short_name, desc, status


From martinglobal at gmail.com  Mon Jan 29 16:42:16 2007
From: martinglobal at gmail.com (Martin Global)
Date: 29 Jan 2007 13:42:16 -0800
Subject: We sell to everyone!!! Government, Wholesalers, Distributers,
	Entreprenuers.....www.martin-global.com
Message-ID: <1170106936.496876.230580@q2g2000cwa.googlegroups.com>

Martin Global is one of North America's leading importers of goods
 manufactured and produced throughout Asia. We are distinctively 
unique
 from other importers, as we have one of North America's largest 
networks
 linking our organization directly to thousands of manufacturers and 
suppliers in
 Asia and throughout the world.

 We at Martin Global are proud of our reputation for excellence: a
 reputation based on our commitment to the highest manufacturing and 
ethical
 standards.  At Martin Global, all of our business relationships with 
customers,
 suppliers, manufacturers and employees rest on a foundation of 
integrity and
 trust.


 Mission Statement

 Martin Global puts the needs of its clients first! We strive to 
establish
 long-term personal relationships built upon clients' trust in our 
ability
 to provide superior products at competitive prices. Whether you're a 
large
 corporation, government entity or a sole proprietor, we take these
 relationships very seriously and we believe that our success is 
measured
 by the success of our clients and their return business. Inquiries 
always welcomed.

 Your message will responded to within 8 hours.

 Regards,


 Donovan Martin
 Martin Global

www.martin-global.com



From hg at nospam.org  Wed Jan 24 03:05:22 2007
From: hg at nospam.org (hg)
Date: Wed, 24 Jan 2007 09:05:22 +0100
Subject: My python programs need a GUI, wxPython or PyQt4?
References: <ep60jp$63v$1@aioe.org> <45B76FE8.5080701@codebykevin.com>
	<dc1aa$45b77070$4275d90a$10460@FUSE.NET>
Message-ID: <DAKth.286299$Pv5.99355@newsfe17.lga>

Kevin Walzer wrote:

> Kevin Walzer wrote:
> 
>> 
>> Tablelist: http://www.nemethi.de/
>> Tabelist for Tkinter (with Tile support):
>> http://tkinter.unpythonic.net/wiki/TableListTileWrapper
>> 
> 
> Additionally, here is a link to some screenshots for Tablelist:
> 
> http://www.nemethi.privat.t-online.de/tablelist/screenshots.html
> 
> 
> --
> Kevin Walzer
> Code by Kevin
> http://www.codebykevin.com

Just for info - one of the reasons I stopped using Tkinter a few years ago
was for the lack of print support (preview ...) - is there such an
extension today ?

hg



From mateushenriquebrum at gmail.com  Sun Jan  7 19:20:43 2007
From: mateushenriquebrum at gmail.com (mateushenriquebrum at gmail.com)
Date: 7 Jan 2007 16:20:43 -0800
Subject: Table
Message-ID: <1168215643.745782.34050@s80g2000cwa.googlegroups.com>

Hello
Someone know how do I get the collunm's number of a gkt.Table ?



From bignose+hates-spam at benfinney.id.au  Tue Jan 30 01:46:51 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 30 Jan 2007 17:46:51 +1100
Subject: parent-child object design question
References: <1170136965.015119.225920@q2g2000cwa.googlegroups.com>
Message-ID: <87hcu9xb8k.fsf@benfinney.id.au>

"manstey" <manstey at csu.edu.au> writes:

> I have two classes. The first one wraps around an old-style class
> called oref
>
> Class CacheClass(object):
>     def __init__(self, obj):
>         self.__data = obj
>     def __getattr__(self, attr):
>         return getattr(self.__data, attr)

I presume the 'obj' argument to this class's __init__ method contains
the 'oref' instance.

It's a little confusing to call the argument to __getattr__ "attr",
since it's actually the *name* of the attribute to be accessed, not
the attribute itself.

> The second class is much the same, also wrapping, but has some
> attributes.
>
> class CacheProperty(object):
>     def __init__(self, obj, dicProperties={}):

Setting a container class as a default argument is prone to error; the
default argument gets created once, when the 'def' statement is
executed. Better to default to None, and trigger on that inside the
function.

>         self.__data = obj
>         lisProperties=[]
>         for key, val in dicProperties.iteritems():
>             setattr(self, key, val)
>             lisProperties.append(key)
>         self.Properties = lisProperties

The name of this class doesn't really tell me what an instance of the
class *is*. Is it a "cache property", as the name seems to indicate?
If so, why does a "cache property" instance itself contain a list of
properties?

>     def __getattr__(self, attr):
>         return getattr(self.__data, attr)
>
> Here is my code:
>
> >>> MyClass = CacheClass(oref)

This is a confusing example; MyClass implies that the object is a
class, but this is now an instance of CacheClass, not a class.

Also, it's conventional in Python to name classes in TitleCase, but to
name instances (and functions) starting with lowercase.

> >>> MyProperty = CacheProperty(oref2,{'Name':'Surname', 'Value':'Peter'})
> >>> setattr(MyClass,MyProperty.Name,MyProperty)

This might be a good approach if you didn't know you were going to
associate the object MyClass with the object MyProperty at the
creation of MyProperty. However:

> Now, the problem is that I want a method MyClass.MyProperty.Save()
> to save the value of MyClass.MyProperty to the database backend on
> disk, but the code for this is part of the wrapped oref code, and
> thus is invoked only by
> MyClass.set(MyProperty.Name,MyProperty.Value).

This implies that there's a definite "each CacheProperty instance is
associated with exactly one CacheClass instance" invariant.

If that's true, the best thing to do is to pass MyClass to the
constructor for the CacheProperty class, and have each instance set
the relationship in the __init__ method.

I don't know what a descriptive term for the relationship between the
CacheClass instance and the CacheProperty instance is, so I'm going to
use "parent"; you should choose something more descriptive.

    class CacheProperty(object):
        def __init__(self, obj, parent, properties=None):
            self.__data = obj
            self._bind_to_parent(parent)
            if properties is None:
                properties = {}
            self._accumulate_properties(properties)

        def _bind_to_parent(self, parent):
            setattr(parent, self.Name, self)

        def _accumulate_properties(self, properties):
            self.properties = []
            for key, val in properties.iteritems():
                setattr(self, key, val)
                self.properties.append(key)

        def __getattr__(self, name):
            return getattr(self.__data, name)

-- 
 \         "Marriage is a wonderful institution, but who would want to |
  `\                     live in an institution."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney



From icetortoise at gmail.com  Wed Jan 31 03:56:15 2007
From: icetortoise at gmail.com (Andy Wu)
Date: 31 Jan 2007 00:56:15 -0800
Subject: Retrieve keywords a internet domain name
Message-ID: <1170233775.215834.14340@a34g2000cwb.googlegroups.com>

Hi All,

I've been working on a domain parking project where we need to analyze
a domain name, say "bookhotel", and get keywords(book, hotel) out of
it, then use these keywords to do some search.

There are two ways to do this as far as I can see, longest match and
quickest match.
Longest match:
bookhotel -> check with a dictionary -> False
bookhote -> dictionary -> False
...
book -> dictionary -> True, kw1 = book
then try the rest of the domain name
hotel -> dictionary -> True, kw2 = hotel

While quickest match starts with 'b'.

The keywords sure will not be perfect, but I think these two will work
for us at the moment.

Any comments/suggestions on this?

Also, does anyone know where I can find a decent dictionary that I can
use to verify if a word is a valid English word?



From garylinux at gmail.com  Wed Jan  3 22:22:23 2007
From: garylinux at gmail.com (garylinux at gmail.com)
Date: 3 Jan 2007 19:22:23 -0800
Subject: How do I add users using Python scripts on a Linux machine
In-Reply-To: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
Message-ID: <1167880942.102299.241940@q40g2000cwq.googlegroups.com>

I find that I can often live with a 0-60 sec. pause. and set command in
a queue like
then have a cron that runs once a min  as the user you need to run this
on
that looks at the queue and sees if there are any pending

I often use a sql database for this



From ronrsr at gmail.com  Tue Jan  2 00:57:39 2007
From: ronrsr at gmail.com (ronrsr)
Date: 1 Jan 2007 21:57:39 -0800
Subject: Special Characters (Unicode, Ascii) in Python and MySQL
Message-ID: <1167717459.802890.96740@n51g2000cwc.googlegroups.com>

I have an MySQL database called zingers. The structure is:

zid - integer, key, autoincrement
keyword - varchar
citation - text
quotation - text

I am having trouble storing text, as typed in latter two fields.
Special characters and punctuation all seem not to be stored and
retrieved correctly.

Special apostrophes and single quotes from Microsoft Word are causing a
special problem, even though I have ''ed all 's

perhaps the encoding of the database itself should be different? it is
currenlty latin_swedish_ci

Input and output is through a browser.

I think my problem may be that I need to encode the string before
saving it in the databse. Can anyone point me in the right direction
here?



here's the error message:

UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position
95: ordinal not in range(128)
      args = ('ascii', "update zingers set keywords =
'a;Action;b;Religi... \n \n \n ' where zid = 422", 95, 96, 'ordinal not
in range(128)')
      encoding = 'ascii'
      end = 96
      object = "update zingers set keywords = 'a;Action;b;Religi... \n
\n \n ' where zid = 422"
      reason = 'ordinal not in range(128)'
      start = 95



the characters I am trying to add are startquote and endquote copied
and pasted from Microsoft Word.



Can anyone help me on this?

bests, 

-rsr-



From hg at nospam.org  Thu Jan 25 10:30:07 2007
From: hg at nospam.org (hg)
Date: Thu, 25 Jan 2007 16:30:07 +0100
Subject: Right-Justifying Numeric Output
References: <mailman.3171.1169763446.32031.python-list@python.org>
Message-ID: <ybauh.51060$oA1.7068@newsfe19.lga>

Rich Shepard wrote:

>    I have this print statement in a function:
> 
> print '%2d   $%11.2f  $%10.2f  $%9.2f  $%9.2f' %(nper, pv, diff, ten,
> bonus)
> 
> and I would like to have the output right justified in the specified
> field. My trials using .rjust(n) have produced that string in the output,
> not the intended results. Is there a way of right justifying numeric
> output?
> 
> Thanks,
> 
> Rich
> 
> --
> Richard B. Shepard, Ph.D.               |    The Environmental Permitting
> Applied Ecosystem Services, Inc.        |          Accelerator(TM)
> <http://www.appl-ecosys.com>     Voice: 503-667-4517      Fax:
> 503-667-8863

assuming max size = 10

#with spaces 
>> '% 10d' % 11
'        11'
#with zeros
>>'%010d' % 11
'0000000011'

hg



From ocollioud at gmail.com  Thu Jan 25 13:10:38 2007
From: ocollioud at gmail.com (olive)
Date: 25 Jan 2007 10:10:38 -0800
Subject: ANN: Dejavu 1.5.0RC1
In-Reply-To: <mailman.3122.1169680178.32031.python-list@python.org>
References: <mailman.3122.1169680178.32031.python-list@python.org>
Message-ID: <1169748635.912754.191720@j27g2000cwj.googlegroups.com>

Looks interesting...

Do you consider a StorageManagers for Oracle ?

Olive.

On Jan 24, 11:57 pm, "Robert Brewer" <fuman... at amor.org> wrote:
> The Dejavu Object-Relational Mapper (version 1.5.0RC1) is now available
> and in the public domain. Get it athttp://projects.amor.org/dejavu,
> or from PyPI:http://www.python.org/pypi/Dejavu/1.5.0RC1.
>
> Dejavu is an Object-Relational Mapper for Python applications. It is
> designed to provide the "Model" third of an MVC application. Dejavu
> avoids making decisions in the framework which are better left to
> developers, and avoids forcing developers to make decisions which are
> better left to deployers. In particular, deployers are allowed to mix
> and match storage mechanisms, including how and when to cache objects in
> memory, making it easier for deployers to tune applications to their
> particular environment.
>
> Dejavu provides:
>
> Modeling Layer
> 1. A base Unit class for persisting objects to storage.
> 2. A base UnitProperty class for persistent object attributes.
> 3. ID Sequencers.
> 4. Associations between Unit classes.
> 5. Unit Engines, Rules, and Collections.
> 6. Aggregation and analysis tools.
>
> Application Layer
> 1. Expressions: pure Python lambda querying. This is perhaps the most
>    appealing feature of Dejavu.
> 2. Sandboxes, which serve as Identity Maps, transaction boundaries,
>    and per-connection caches.
> 3. An Arena class for application-level data.
>
> Storage Layer
> 1. A base StorageManager class and specification. Unlike many ORMs,
>    Dejavu does not require you to have complete control of the back end.
> 2. Specific StorageManagers for:
>    a. Microsoft SQL Server/MSDE
>    b. Microsoft Access (Jet)
>    c. PostgreSQL
>    d. MySQL
>    e. SQLite
>    f. Shelve
>    g. Firebird
>    h. RAM
>    i. Filesystem
>
> What's New in 1.5:http://projects.amor.org/dejavu/wiki/WhatsNewIn15
>
>  * Native ID sequencing.
>  * Distributed transactions and tested isolation levels.
>  * Complete database introspection and auto discovery.
>
>  * New Firebird support.
>  * New RAM Storage Manager.
>  * New psycopg2 support.
>  * New support for using the sqlite3 module built into Python 2.5.
>  * Support for typed and typeless SQLite.
>  * Support for SQLite :memory: databases.
>
>  * Complete numeric precision and scale support.
>  * Native date function support.
>  * Complete M x N type-adaptation.
>  * Bulletproof encoding support.
>  * New 'range' function which returns the closed interval [min(attr),
> ..., max(attr)].
>  * New 'sum' function which returns the sum of all non-None values for
> the given cls.attr.
>  * Multiple and custom Associations.
>  * Improved performance (especially ADO).
>  * New JSON encoder/decoder.
>  * Short config names for Storage Managers.
>  * ADO: New support for the CURRENCY datatype.
>  * ADO: Improved string comparisons using Convert and StrComp.
>
> Upgrading to 1.5:
> Seehttp://projects.amor.org/dejavu/wiki/UpgradeTo1.5
>
> Documentation for 1.5:http://projects.amor.org/docs/dejavu/1.5.0RC1/
>
> Robert Brewer
> System Architect
> Amor Ministries
> fuman... at amor.org



From gagsl-py at yahoo.com.ar  Mon Jan 15 13:44:19 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 15 Jan 2007 15:44:19 -0300
Subject: check if there is data in stdin without blocking
In-Reply-To: <9uNqh.48239$X97.14123@newsfe18.lga>
References: <4PMqh.47441$X97.9536@newsfe18.lga>
	<uhNqh.47996$X97.358@newsfe18.lga>
	<eog8hb$ke4$1@upsn250.cri.u-psud.fr>
	<9uNqh.48239$X97.14123@newsfe18.lga>
Message-ID: <7.0.1.0.0.20070115154356.03288828@yahoo.com.ar>

At Monday 15/1/2007 05:55, hg wrote:

>Well I'm testing under Linux but need support under Windows ... is there any
>way to poll stdin somehow under both plateform ?

I think you may want this portable getch function:
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/134892>


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From creechm at gmail.com  Fri Jan 12 11:19:17 2007
From: creechm at gmail.com (Mark)
Date: 12 Jan 2007 08:19:17 -0800
Subject: Need better run/edit method. I have to restart the shell after
	every script change.
In-Reply-To: <mailman.2594.1168545493.32031.python-list@python.org>
References: <1168544475.849070.92160@77g2000hsv.googlegroups.com>
	<mailman.2594.1168545493.32031.python-list@python.org>
Message-ID: <1168618757.457350.184350@a75g2000cwd.googlegroups.com>

Thanks guys.  I'll give it a try.
Brian Blais wrote:
> Mark wrote:
> > I'm currently running the IDLE shell under Python 2.5, on Windows XP.
> >
> > Every time I edit my .txt or .py file, I have to restart the IDLE shell
> > for the changes to take effect. It's pretty annoying. Assuming IDLE is
> > already open, here are the steps that I typically take:
> >
> > 1. Open .txt version of module or script using notepad
> > 2. make changes
> > 3. save .txt file as .txt file
> > 4. save .txt file as .py file
> > 5. reset IDLE
> > 6. import module again
> >
>
> why do you involve notepad, and .txt files?  Instead, try this:
>
> 1. Run Idle
> 2. Choose File/New Window
> 3. Edit your .py file, and save it as a .py file
> 4. Choose Run/Run Module
> 5. Make changes, and save again
> 6. Choose Run/Run Module
> 7. etc...
>
> you don't need to close IDLE ever.  IDLE refers to the editor, and the shell that
> runs connected to it.  If you have just the shell, you can open the editor with
> File/New Window.  If you have just the editor, you can choose Run/Python Shell   or
> Run/Run Module depending on what you want to do, to get the shell.
>
> You can also take a .py file in the Windows explorer, right-click, and choose "Open
> with IDLE" to start editing it directly.
>
> You shouldn't save things as .txt, because then IDLE will not recognize it is python
> you are writing, and the right-click trick probably won't work either.  You should
> never use Notepad, because it is just icky, and doesn't know about any programming
> languages.  :)
>
> Hope this helps,
>
> 			Brian Blais
>
>
> --
> -----------------
>
>               bblais at bryant.edu
>               http://web.bryant.edu/~bblais



From removethis.kartic.krishnamurthy at gmail.com  Mon Jan 29 16:16:03 2007
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Mon, 29 Jan 2007 21:16:03 GMT
Subject: Sourcing Python Developers
In-Reply-To: <7xirepimw0.fsf@ruckus.brouhaha.com>
References: <45BE4348.9020500@gmail.com> <7xirepimw0.fsf@ruckus.brouhaha.com>
Message-ID: <45BE6411.1020508@gmail.com>

Paul Rubin sayeth,  on 01/29/2007 03:44 PM:
> Kartic <removethis.kartic.krishnamurthy at gmail.com> writes:
>> In any case, we have immediate requirements for a Pythonista with C++,
>> MySQL, XML, Debian expertise. Please email resume to:
> 
> Generally it's ok to post here to the newsgroup with Python jobs.  But
> you should describe the specific openings you're trying to fill, and
> their locations.  

Paul - Thanks for the clarification; will use the list _sparingly_ post 
jobs.

The skills I listed are the once I have (Py, MySQL, C++, XML, Debian). 
Location: Torrance CA.
Compensation: Commensurate with Experience.


From nagle at animats.com  Mon Jan 29 14:45:47 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 29 Jan 2007 19:45:47 GMT
Subject: SQL connecting
In-Reply-To: <mailman.3275.1170098134.32031.python-list@python.org>
References: <mailman.3275.1170098134.32031.python-list@python.org>
Message-ID: <L9svh.1239$zH1.840@newssvr29.news.prodigy.net>

Scripter47 wrote:
> Hey
> 
> It got a problem with python to connect to my SQL DBs, that's installed
> on my apache server. how do i connect to sql? Gettting data? Insert into 
> it?

    You need a third-party open source package called "MySQLdb".

					John Nagle


From ptmcg at austin.rr.com  Thu Jan 25 23:10:11 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 25 Jan 2007 20:10:11 -0800
Subject: Pyparsing - Dealing with a Blank Value
In-Reply-To: <1169774005.890880.259830@j27g2000cwj.googlegroups.com>
References: <1169774005.890880.259830@j27g2000cwj.googlegroups.com>
Message-ID: <1169784611.477582.270450@v33g2000cwv.googlegroups.com>

On Jan 25, 7:13 pm, "Steve" <ste... at cruzio.com> wrote:
> Hi All,
>
> I've picked up thePyParsingmodule and am trying to figure out how to
> do a simple parsing of some HTML source code.  My specific problem is
> dealing with an <TD></TD> element that is blank.
>

I'd also suggest use the makeHTMLTags helper module for the TR and TD
tags:

trStart,trEnd = makeHTMLTags("TR")
tdStart,tdEnd = makeHTMLTags("TD")

makeHTMLTags includes a much more robust definition than just
Literal("<tag>"), including recognition of attributes and tolerance of
upper/lower case.

-- Paul



From nospam at riddergarn.dk  Sun Jan 28 06:19:05 2007
From: nospam at riddergarn.dk (Scripter47)
Date: Sun, 28 Jan 2007 12:19:05 +0100
Subject: Mulig SPAM: Re: IP address
In-Reply-To: <ephtph$fcl$1@minji.szn.dk>
References: <mailman.3244.1169978684.32031.python-list@python.org>
	<ephtph$fcl$1@minji.szn.dk>
Message-ID: <45BC86A9.2010509@riddergarn.dk>

Klaus Alexander Seistrup skrev:
> Scripter47 wrote:
> 
>> How do i get my ip address?
>>
>> in cmd.exe i just type "ipconfig" then it prints:
>>       ...
>>       IP-address . . . . . . . . . . . . . . . . . : 192.168.1.10
>>       ...
>> how can i do that in python??
> 
> #v+
> 
> python -c 'import re, urllib; print re.findall("<title>Your IP: (.+?)</title>", urllib.urlopen("http://myip.dk/").read())[0]'
> 
> #v-
> 
> Cheers,
> 
Hmm then you need Internet connecting. can i do it without that? ?

and it doesn't work either :(





From jura.grozni at gmail.com  Sun Jan 28 18:01:37 2007
From: jura.grozni at gmail.com (azrael)
Date: 28 Jan 2007 15:01:37 -0800
Subject: Data structure and algorithms
In-Reply-To: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
References: <1170024965.321036.206010@m58g2000cwm.googlegroups.com>
Message-ID: <1170025297.838143.191740@j27g2000cwj.googlegroups.com>

I'm not a kid who heard that Python is simple, so he wants to use it 
and throw it away. I discovered it about 2 months ago, and I learnt it 
better then c in 2 years.

I want to use python for this test because i love it. I am amazed 
about what i can do i such little time. My god, I even printed the 
python logo on my laptop. Please guys help me. I don't want to go back 
to C to pass the test



From grante at visi.com  Tue Jan  2 17:16:24 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 02 Jan 2007 22:16:24 -0000
Subject: list/dictionary as case statement ?
References: <d59f3$459ad7cf$d443bb3a$14116@news.speedlinq.nl>
Message-ID: <12plmdoem9bg575@corp.supernews.com>

On 2007-01-02, Stef Mientki <S.Mientki-nospam at mailbox.kun.nl> wrote:

> If I'm not mistaken, I read somewhere that you can use 
> function-names/references in lists and/or dictionaries, but
> now I can't find it anymore.
>
> The idea is to build a simulator for some kind of micro
> controller (just as a general practise, I expect it too be
> very slow ;-).
>
> opcodes ={
>    1: ('MOV', function1, ...),
>    2: ('ADD', function2, ),
>    3: ('MUL', class3.function3, )
>    }
>
> def function1
>    # do something complex
>
>
> Is this possible ?

Yes.  

What you're implementing is commonly referred to as a
"dispatcher", and they're often done with a dictionary exactly
as you show.

-- 
Grant Edwards                   grante             Yow!  I guess you guys got
                                  at               BIG MUSCLES from doing too
                               visi.com            much STUDYING!


From dilbert01 at gmail.com  Mon Jan 22 12:49:02 2007
From: dilbert01 at gmail.com (alessandro)
Date: 22 Jan 2007 09:49:02 -0800
Subject: closing a "forever" Server Socket
In-Reply-To: <mailman.2990.1169484872.32031.python-list@python.org>
References: <1169123381.930403.24170@38g2000cwa.googlegroups.com>
	<1169143715.222186.30530@51g2000cwl.googlegroups.com>
	<1169482385.253887.249030@51g2000cwl.googlegroups.com>
	<mailman.2990.1169484872.32031.python-list@python.org>
Message-ID: <1169488142.312711.322320@51g2000cwl.googlegroups.com>

Oh my God! it's really so complicated?

3 modules (threading, SocketServer, select) only for design a way to
shutdown a TCP server????
...but they told me that python was easy... :)

I'm working on a simulator and I have a monitor server that collects
information. I can shutdown it using Ctrl-C from the keyboard but for
my purpose could be very nice if I introduce a timer. So I could launch
my monitor like this:

./monitor 100

and my monitor will run for 100 seconds. For this I'm using the Timer
class provided by threading module, I have implemented a function like
this:

def shutdown():
    sys.exit()

but it doesen't work because the server remain alive...maybe
SocketServer create immortal server...
I need only to close my application, there is a way to force the server
thread to close?

thanks!
Alessandro



Laszlo Nagy ha scritto:

> alessandro ?rta:
> > thanks
> >
> > infact the server_forever() method is only a serve() method inside an
> > infinite loop.
> >
> > many thanks again,
> >
> Here is a snipped that show a "software terminateable threading TCP
> socker server". The "server" object is a SocketServer instance,
> server_stopped is a threading.Event instance. You should also import the
> "select" module.
>
>         srvfd = server.fileno()
>         while not server_stopped.isSet():
>             ready = select.select([srvfd], [], [], 1) # Give one second
> for incoming connection so we can stop the server in seconds
>             if srvfd in ready[0]:
>                 server.handle_request()
>             else:
>                 pass  # log('No incoming connection, retrying')



From mheslep at gmail.com  Fri Jan 12 15:37:25 2007
From: mheslep at gmail.com (mheslep at gmail.com)
Date: 12 Jan 2007 12:37:25 -0800
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
	<1168597288.571937.176430@s34g2000cwa.googlegroups.com>
	<mailman.2642.1168609719.32031.python-list@python.org>
Message-ID: <1168634245.604635.26860@38g2000cwa.googlegroups.com>


Konrad Hinsen wrote:
.... Perhaps we should start a
> special interest group? Not so much in order to work on a single
> project; I believe that at the current state of parallel computing we
> still need many different approaches to be tried. But an exchange of
> experience could well be useful for all of us.
> 
+ 1

-Mark



From gagsl-py at yahoo.com.ar  Wed Jan 24 21:26:26 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 24 Jan 2007 23:26:26 -0300
Subject: difflib qualm
In-Reply-To: <2adc542f0701241805i79b79580y2522ec854e49621d@mail.gmail.co
 m>
References: <2adc542f0701241805i79b79580y2522ec854e49621d@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070124231815.044b9058@yahoo.com.ar>

At Wednesday 24/1/2007 23:05, Sick Monkey wrote:

>I am trying to write a python script that will compare 2 files which 
>contains names (millions of them).
>
>More specifically, I have 2 files (Files1.txt and 
>Files2.txt).  Files1.txt contains 180 thousand names and Files2.txt 
>contains 34 million names.
>
>I have a script which will analyze these two files and store them 
>into 2 different lists (fileList1 and fileList2 respectivly).  I 
>have imported the diflib library and after the lists are created, 
>matching on the following criteria " " for diflib -> (just the names 
>that are similar between the two files).
>
>This works perfectly for hundreds of names but is taking forever for 
>millions of them; thus not really efficient.
>
>Does anyone have any idea on how to get this more 
>efficient?  (speaking of Time and RAM)
>
>Any advice would be greatly appreciated.   (NOTE:  I have been 
>trying to study multithreading, but have not really grasp the 
>concept.  So I may need some examples.)

When you say "names" you mean people's names? So you want to match, 
say, Levenshtein Vladimir to Lebenstain V.? And you only have the 
names to match?
Not a good candidate for difflib. See this paper:
Record Linkage: A Machine Learning Approach, A Toolbox, and A Digital 
Government Web Service (2003)
Mohamed G. Elfeky, Vassilios S. Verykios, Ahmed K. Elmagarmid, Thanaa 
M. Ghanem, Ahmed R. Huwait.
http://citeseer.ist.psu.edu/elfeky03record.html
and you can get other pointers from the Levenshtein distance article 
in Wikipedia and http://en.wikipedia.org/wiki/Fuzzy_string_searching


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From gagsl-py at yahoo.com.ar  Thu Jan  4 21:21:53 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 04 Jan 2007 23:21:53 -0300
Subject: Draw rectangle on a Window DC
In-Reply-To: <459cd1e4.0232d77c.0893.ffff821d@mx.google.com>
References: <459cd1e4.0232d77c.0893.ffff821d@mx.google.com>
Message-ID: <7.0.1.0.0.20070104230719.05afb190@yahoo.com.ar>

At Thursday 4/1/2007 07:07, Raymond wrote:

>I want to Draw rectangle on Dc when gived a position. Can you teach 
>me? Let me view your code?

This is more a Windows question. See 
http://msdn.microsoft.com/library/en-us/gdi/rectangl_4b03.asp

py>from win32gui import GetDC
py>hdc=GetDC(0)
py>from win32gui import Rectangle
py>Rectangle(hdc, 100,100, 300,300)
py>ReleaseDC(hdc,0)
0
py>

You should see a white square on your screen.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From Barry.Carroll at psc.com  Tue Jan 23 18:32:34 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Tue, 23 Jan 2007 15:32:34 -0800
Subject: Overloading assignment operator
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595AA4@eugsrv400.psc.pscnet.com>

> -----Original Message-----
> From: Achim Domma [mailto:domma at procoders.net]
> Sent: Tuesday, January 23, 2007 10:25 AM
> To: python-list at python.org
> Subject: Overloading assignment operator
> 
> Hi,
> 
> I want to use Python to script some formulas in my application. The
user
> should be able to write something like
> 
> A = B * C
> 
> where A,B,C are instances of some wrapper classes. Overloading * is no
> problem but I cannot overload the assignment of A. I understand that
> this is due to the nature of Python, but is there a trick to work
around
> this?
> All I'm interested in is a clean syntax to script my app. Any ideas
are
> very welcome.
> 
> regards,
> Achim
Hello, Achim,

I asked this question (in a different context) some months ago on the
Python tutor mailing list (tutor at python.org).  The answer I got is
summarized below.

** There is no assignment operator in Python, assignment is a
** binding of an object to a name.
(Alan Gauld)

* ... the assignment operator is used to assign an
* object to a name in the current namespace... IOW, you cannot "overload
* the assignment operator."
(wesley chun)

Mr. Chun went on to describe a way to accomplish something similar,
using properties.  I reprint it here, slightly rewritten to match your
use case.  

* ...here is where
* properties become useful.  you can create a getter, setter, and even a
* deleter and doc string if you want. here's how you use it... add the
* following to your class:

* def get_result(self):
*     return self.__result
*
* def set_result (self, expression):
*     self.__result = expression
*
* result = property(get_result, set_ result, doc='result of operations')
*
* -----
*
* in actuality, the value is stored in self.__result, but access is via
* self.result.  this should give you what you need provided you are
happy
* with using "A.result = B * C" vs. "A = B * C", the latter of which
* will never work the way you want.  ...

I have tested this using the admittedly simple-minded code snipped
below.  

>>>>>>>>>>
@BCARROLL[Python]|3> class Aclass:
                 |.>     def __init__(self):
                 |.>         __result = None
                 |.>     def get_result(self):
                 |.>         return self.__result
                 |.>     def set_result (self, result):
                 |.>         self.__result = result
                 |.>     result = property(get_result, set_result,
doc='result of expression')
                 |.>
@BCARROLL[Python]|5> A = Aclass()
@BCARROLL[Python]|7> a.result = 2*3
@BCARROLL[Python]|8> a.result
                 <8> 6
@BCARROLL[Python]|9> a.result = 25.0 * 5.25
@BCARROLL[Python]|10> a.result
                 <10> 131.25
@BCARROLL[Python]|11>
>>>>>>>>>>

HTH

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed





From anthra.norell at vtxmail.ch  Thu Jan 11 07:20:45 2007
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Thu, 11 Jan 2007 13:20:45 +0100
Subject: Type casting a base class to a derived one?
Message-ID: <45A62B9D.7080805@vtxmail.ch>

Hi all,
   If I derive a class from another one because I need a few extra 
features, is there a way to promote the base class to the derived one 
without having to make copies of all attributes?

class Derived (Base):
   def __init__ (self, base_object):
      # ( copy all attributes )
      ...

This looks expensive. Moreover __init__ () may not be available if it 
needs to to something else.

Thanks for suggestions

Frederic




From bdesth.quelquechose at free.quelquepart.fr  Mon Jan  8 16:08:40 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 08 Jan 2007 22:08:40 +0100
Subject: Why less emphasis on private data?
In-Reply-To: <1168283295.899914.125400@38g2000cwa.googlegroups.com>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168283295.899914.125400@38g2000cwa.googlegroups.com>
Message-ID: <45a2ac91$0$316$426a74cc@news.free.fr>

time.swift at gmail.com a ?crit :
> Wow, I got a lot more feedback than I expected!
> 
> I can see both sides of the argument, both on technical merits, and
> more philosophical merits.  When I first learned C++ I felt
> setters/getters were a waste of my time and extra code.  When I moved
> to C# I still felt that, and with their 'Property" syntax I perhaps
> felt it more.  What changed my mind is when I started placing logic in
> them to check for values and throw expections or (hopefully) correct
> the data. That's probably reason one why I find it weird in Python

Python does have properties too. The point is that you can as well start 
with a plain attribute, then turn it into a computed one when (and if) 
needed.

> Reason two is, as the user of a class or API I *don't care* what is
> going on inside.

Very true... until you have a legitimate reason to mess with 
implementation because of a use case the author did not expect.

> All I want visible is the data that I can change.  The
> '_' convention is nice.. I do see that.  I guess my old OOP classes are
> hard to forget about.

Access restriction is not a mandatory part of OO. Of course, objects are 
supposed to be treated as "black boxes", but that's also true of a 
binary executable, and nothing (technically) prevents you to open it 
with an hex editor and hack it as you see fit... But then, you would not 
complain about strange bugs, would you ?-)

> I feel that the state of an object should be
> "stable" and "valid" at all times,

That's fine. Just remember that, in Python, methods are attributes too, 
and can be dynamically modified too. So when thinking about "object 
state", don't assume it only implies "data" attributes. Heck, you can 
even dynamically change the *class* of a Python object...

> and if its going into an unstable
> state - error then, not later.  That's why I like being able to protect
> parts of an instances state. If, as a provider of a calculation engine,
> I let the user change the internal state of the engine, I have no
> assurances that my product (the engine) is doing its job...

If you follow the convention, you are not responsible for what happens 
to peoples messing with implementation. period. Just like you're not 
responsible for what happens if someone hack your binary executable with 
an hex editor.

Welcome to Python, anyway.


From jpellerin at gmail.com  Wed Jan 31 23:31:27 2007
From: jpellerin at gmail.com (JP)
Date: 31 Jan 2007 20:31:27 -0800
Subject: ANN: nose 0.9.2 released
Message-ID: <1170304286.960583.210830@h3g2000cwc.googlegroups.com>

nose is a discovery-based unittest extension that provides an
alternate test discovery and running process for unittest, one that is
intended to mimic the behavior of py.test as much as is reasonably
possible without resorting to too much magic.

nose 0.9.2 includes quite a few bug fixes and new features. The most
significant are the new nosetests setuptools command, contributed by
James Casbon, better support for python 2.2 thanks to a patch from
Chad Whitacre, and some useful utilities for testing Twisted programs
and writing decorators contributed by Antoine Pitrou. Thanks to them
all, and the many other folks who contributed patches and filed bug
reports and feature requests.

For more information, see: http://somethingaboutorange.com/mrl/
projects/nose/

nose's project home has moved from python hosting to Google code.
Please update your svn checkouts and bookmarks. To check out the
current trunk:

svn co http://python-nose.googlecode.com/svn/trunk

To file issues, go to the new issues page:

http://code.google.com/p/python-nose/issues/list

To read up on features, writing plugins, and other topics, visit the
new wiki:

http://code.google.com/p/python-nose/w/list



From thomas.mohme at gmx.net  Wed Jan 31 03:11:46 2007
From: thomas.mohme at gmx.net (Thomas)
Date: 31 Jan 2007 00:11:46 -0800
Subject: Can't install Turbogears (with pysqlite) on Windows
Message-ID: <1170231106.741090.249460@j27g2000cwj.googlegroups.com>

Hi there!

Installing TurboGears out-of-the-box (egg-based) on Windows doesn't
work because I can't
compile the extensions needed for the required pysqlite (also egg-
based):

Installed c:\programme\python24\lib\site-packages\turbogears-1.0.1-
py2.4.egg
Processing dependencies for TurboGears[standard,testtools]>=1.0
Searching for pysqlite
Reading http://www.python.org/pypi/pysqlite/
Reading http://pysqlite.org/
Reading http://www.python.org/pypi/pysqlite/2.3.3
Best match: pysqlite 2.3.3
Downloading http://initd.org/pub/software/pysqlite/releases/2.3/2.3.3/
pysqlite-2.3.3.tar.gz
Processing pysqlite-2.3.3.tar.gz
Running pysqlite-2.3.3\setup.py -q bdist_egg --dist-dir c:\temp
\easy_install-ovrxv0\pysqlite-2.3.3\egg-dist-tmp-0ynhfx
warning: no files found matching 'doc\*.html'
error: Setup script exited with error: Python was built with version
7.1 of Visual Studio, and extensions need to be built with the same
version of the compiler, but it isn't installed.

To get away without the need to compile the pysqltite extensions I
tried  to install the Windows-binary package of pysqlite manually
before installing TG this also doesn't work, because easy_install
doesn't know anything of my fresh installed pysqlite and tries to
install the egg from cheeseshop (with the above error . . .).

Any suggestions to get beyond this?
Is it possible to "tweak" the TG egg-installation so that it won't try
to "easy_install pysqlite"?
For the application I'm intending to build with TurboGears I don't
even need pysqlite :(

Thomas



From citronelu at yahoo.com  Wed Jan 24 16:35:51 2007
From: citronelu at yahoo.com (citronelu at yahoo.com)
Date: 24 Jan 2007 13:35:51 -0800
Subject: wxPython: panel not fully painted
Message-ID: <1169674550.837006.304370@q2g2000cwa.googlegroups.com>

Hi,

I'm new to wxpython, and the following code is my first serious
attempt:


#~ start code
import wx

class MyPanel(wx.Panel):
    def __init__(self, parent, id):
        wx.Panel.__init__(self, parent, id)
        self.parent = parent
        button = wx.Button(self, -1, "Refresh")
        button.SetPosition((100, 100))
        button.SetFocus()

        self.Bind(wx.EVT_BUTTON, self.OnCloseMe, button)

    def OnCloseMe(self, event):
        self.parent.f_redraw(self)
        pass


class MyFrame(wx.Frame):
    def __init__(
            self, parent, ID, title, pos=wx.DefaultPosition,
            size=wx.DefaultSize, style=wx.DEFAULT_FRAME_STYLE
            ):

        wx.Frame.__init__(self, parent, ID, title, pos, size, style)

    def f_redraw(self, kill_window):
        kill_window.Destroy()
        MyPanel(self, -1)
        #~ self.SendSizeEvent()


wxApp = wx.App()
f = MyFrame(None, -1, "App Title")
MyPanel(f, -1)
f.Show()
wxApp.MainLoop()


#~ end code


My problem is: when I press the "refresh" button, the new panel is
painted only as a 20x20 pixels square on the top right side of the
frame. If I resize the frame, the panel is repainted correctly (that's
why I inserted the self.SendSizeEvent() line - commented above).

Is there something I'm missing, or this is normal ?

I'm using python 2.4.3 and wxpython 2.8.1.1 unicode, on WinXP SP2.
Windows extensions are also installed.



From simon at brunningonline.net  Fri Jan 12 15:00:03 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 12 Jan 2007 20:00:03 +0000
Subject: Rational Numbers
In-Reply-To: <eo8oa0$o4o$1@gemini.csx.cam.ac.uk>
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<mailman.2597.1168550439.32031.python-list@python.org>
	<eo6ia5$5bt$1@gemini.csx.cam.ac.uk>
	<mailman.2643.1168611301.32031.python-list@python.org>
	<eo883j$l9d$1@gemini.csx.cam.ac.uk>
	<mailman.2648.1168616202.32031.python-list@python.org>
	<eo8b1r$r9c$1@gemini.csx.cam.ac.uk>
	<mailman.2664.1168630485.32031.python-list@python.org>
	<eo8oa0$o4o$1@gemini.csx.cam.ac.uk>
Message-ID: <8c7f10c60701121200g5acb42acna447d716652a75af@mail.gmail.com>

On 12 Jan 2007 19:41:52 GMT, Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
> Sigh.  I was hoping not to have that myth perpetrated again.
>
> Financial calculations need decimal FIXED-point, with a precisely
> specified precision.  It is claimed that decimal FLOATING-point
> helps with providing that, but that claim is extremely dubious.
> I can explain the problem in as much detail as you want, but would
> very much rather not.

Sorry, Nick, you might have to. ;-)

I'm not educated in these matters, so I'd genuinely like to know why
you say that. Not educated, but I do have some experience; I've used
both fixed and floating point Decimal types extensively, and I've
found floating types superior. More fiddly, certainly, 'cos you have
to explicitly round back down to the precision that you want when you
want. But explicit is better than implicit - the number of subtle
rounding bugs that I've had to fix 'cos someone didn't realise where
rounding was occurring is, uh, well, it happens from time to time. ;-)

What am I missing?

-- 
Cheers,
Simon B
simon at brunningonline.net


From arkanes at gmail.com  Wed Jan 24 12:16:57 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 24 Jan 2007 11:16:57 -0600
Subject: Python does not play well with others
In-Reply-To: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
Message-ID: <4866bea60701240916l604b969u33cd1db70494b516@mail.gmail.com>

On 1/23/07, John Nagle <nagle at animats.com> wrote:
>    The major complaint I have about Python is that the packages
> which connect it to other software components all seem to have
> serious problems.  As long as you don't need to talk to anything
> outside the Python world, you're fine.  But once you do, things
> go downhill.  MySQLdb has version and platform compatibility
> problems.  So does M2Crypto.  The built-in SSL support is weak.
> Even basic sockets don't quite work right; the socket module
> encapsulates the timeout mechanism but doesn't get it right.
>
>    In the Perl, Java, PHP, and C/C++ worlds, the equivalent
> functions just work.   That's because, in those worlds, either the
> development team for the language or the development team
> for the subsystem takes responsibility for making them work.
> Only Python doesn't do that.
>
>    Python has been around long enough that this should have
> been fixed by now.
>
>                                         John Nagle

This just isn't correct. You think that socket libraries don't have
incompatibilities in C and that C++ libraries don't have versioning
problems? You think that SSL works right from Java in all cases, or
that changing your mysql client libraries underneath PHP won't affect
it?


From wolf_tracks at invalid.com  Sun Jan 21 19:40:05 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Mon, 22 Jan 2007 00:40:05 GMT
Subject: Beginners Tutorial in PDF Format?
In-Reply-To: <1169415358.277431.130640@s34g2000cwa.googlegroups.com>
References: <_6Qsh.51414$wc5.5373@newssvr25.news.prodigy.net>
	<1169415358.277431.130640@s34g2000cwa.googlegroups.com>
Message-ID: <FJTsh.36658$Gr2.32367@newssvr21.news.prodigy.net>

Robert Hicks wrote:
> W. Watson wrote:
>> I'd like to print a tutorial in one fell swoop, but it seems most on the
>> various sites are page by page embedded descriptions in the page. Any
>> available as a pdf?
>>
>>           Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
>>               (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
>>                Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet
>>
>>                 Two laws Newton and Einstein didn't discover:
>>                   1. Time is money.
>>                   2. Matter will be damaged in direct proportion
>>                      to its value.
>> --
>>                      Web Page: <home.earthlink.net/~mtnviews>
> 
> http://docs.python.org/download.html
> 
> http://www.diveintopython.org/
> 
> HTH
> 
> Robert
> 
Thanks, but the first url takes me to a web page that contains the complete 
tutorial. Does choosing pdf (USA) in the table download a file that contains 
all the documents on the list below and to the left?

          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

                Two laws Newton and Einstein didn't discover:
                  1. Time is money.
                  2. Matter will be damaged in direct proportion
                     to its value.
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From kw at codebykevin.com  Wed Jan 24 10:32:28 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Wed, 24 Jan 2007 10:32:28 -0500
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <DAKth.286299$Pv5.99355@newsfe17.lga>
References: <ep60jp$63v$1@aioe.org> <45B76FE8.5080701@codebykevin.com>
	<dc1aa$45b77070$4275d90a$10460@FUSE.NET>
	<DAKth.286299$Pv5.99355@newsfe17.lga>
Message-ID: <45B77C0C.1010202@codebykevin.com>

hg wrote:
> Kevin Walzer wrote:
> 
>> Kevin Walzer wrote:
>>
>>> Tablelist: http://www.nemethi.de/
>>> Tabelist for Tkinter (with Tile support):
>>> http://tkinter.unpythonic.net/wiki/TableListTileWrapper
>>>
>> Additionally, here is a link to some screenshots for Tablelist:
>>
>> http://www.nemethi.privat.t-online.de/tablelist/screenshots.html
>>
>>
>> --
>> Kevin Walzer
>> Code by Kevin
>> http://www.codebykevin.com
> 
> Just for info - one of the reasons I stopped using Tkinter a few years ago
> was for the lack of print support (preview ...) - is there such an
> extension today ?
> 
> hg
> 
Printing is the one glaring omission from Tk/Tkinter--at least a unified
printing framework. There are platform-specific extensions for Mac and
Windows. On *Nix, I think most Tk/Tkinter programs just call lpr. None
of these libraries work in quite the same way, so there isn't a simple
way to simply call a standard Tk/Tkinter function to print your data.

This recent thread on comp.lang.tcl discusses the issue:

http://groups.google.com/group/comp.lang.tcl/browse_thread/thread/735c4612541f8669/707463acf6d02c46?

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


From tpochep at mail.ru  Mon Jan 22 06:50:30 2007
From: tpochep at mail.ru (tpochep)
Date: 22 Jan 2007 03:50:30 -0800
Subject: python grammar
Message-ID: <1169466630.014322.232500@l53g2000cwa.googlegroups.com>

Hello.

In 'augop' non-terminal :

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

the delimiter '//=' was skipped. Why?

In 'Boolean operations':

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

In 'expression' rule - what does 'if', 'else' mean? I guess 'if' and
'else' must be keywords, not non-terminals.



From steve at holdenweb.com  Wed Jan 10 13:26:24 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 10 Jan 2007 18:26:24 +0000
Subject: Is there a way to protect a piece of critical code?
In-Reply-To: <000b01c734a0$2f635840$03000080@hendrik>
References: <000b01c734a0$2f635840$03000080@hendrik>
Message-ID: <45A52FD0.60802@holdenweb.com>

Hendrik van Rooyen wrote:
> Hi,
> 
> I would like to do the following as one atomic operation:
> 
> 1) Append an item to a list
> 2) Set a Boolean indicator
> 
> It would be almost like getting and holding the GIL,
> to prevent a thread swap out between the two operations.
> - sort of the inverted function than for which the GIL
> seems to be used, which looks like "let go", get control
> back via return from blocking I/O, and then "re - acquire"
> 
> Is this "reversed" usage possible?
> Is there some way to prevent thread swapping?
> 
This seems to me to be a typical example of putting the cart before the 
horse. Therefore, please don't think that what follows is directed 
specifically at you: it's directed at everybody who thinks that their 
problem is something other than it really is (of course, my extensive 
experience on c.l.py plus my well-known psychic powers uniquely qualify 
me to explain to you that you don't understand your own problem).

> The question arises in the context of a multi threaded
> environment where the list is used as a single producer,
> single consumer queue - I can solve my problem in various
> ways, of which this is one, and I am curious as to if it is 
> possible to prevent a thread swap from inside the thread.
> 
Of course you will know what they say about curiosity [1].

You don't say what the Boolean indicator is for. My natural inclination 
is to assume it's to say whether there's anything in the list. The 
Twisted crew can tell you this is a terrible mistake,. What you should 
really do is define a function that waits until there is something to 
put on the list and then returns a deferred that will eventually 
indicate whether the insertion was successful [2].

But your *actual* problem appears to be the introduction of critical 
sections into your program, a question about which computer scientists 
have written for over forty years now, albeit in the guise of 
discussions about how to get a good meal [3].

I could go on, but I am realising as I write that less and less of this 
is really relevant to you. In short, please don't try to reinvent the 
wheel when there are wheelwrights all around and a shop selling spare 
wheels just around the corner. Python is already replete with ways to 
implement critical sections and thread-safe queuing mechanisms [5].

I could, of course, say

http://www.justfuckinggoogleit.com/search.pl?query=python+atomic+operation

but that would seem rude, which is against the tradition of c.l.py. 
Besides which the answers aren't necessarily as helpful as what's been 
posted on this thread, so I'll content myself with saying that one's can 
often be better spent R'ing TFM than posting on this newsgroup, but that 
while Google /may/ be your friend it's not as good a friend as this 
newsgroup.

If it isn't obvious that this post was meant more to amuse regular 
readers than inform and/or chastise someone who isn't (yet) one then 
please accept my apologies. Fortunately I don't normally go on like this 
more than once a year, so now it's hey ho for 2008 [6].

If you have been, thank you for reading. If you haven't then I guess you 
won't be reading this either. Have a nice day. And a Happy New Year to 
all my readers.

regards
  Steve

[1]: It killed the cat, thereby letting MSDOS's "type" command get a 
toehold and leaving people to fight about whether "less" really was 
"more" or not.

[2]: Of course I'm joking. But it seems that Twisted's detractors don't 
have much of a sense of humour, so it's much more interesting to poke 
fun at Twisted, which at least has the merit of having been designed by 
real human beings with brains and everything. Though I have never seen 
any of them take a beer. [4].

[3] The UNIX fork() system call is actually named in honour of Edsger 
Dijkstra's discussions of the philosophers' problem, a classic text in 
the development of critical sections. Not a lot of people know that. 
Mostly because I just made it up.

[4] That's this week's dig at both the Twisted community. I cheerfully 
admit that although this assertion is true it's a simple attempt to give 
currency to a scurrilous fabrication. I'm hoping I can persuade the 
Twisted crew to descend on PyCon /en masse/, thereby multiplying the fun 
quotient by 1.43.

[5] Including thread.Lock and Queue.Queue - I bet you're getting sorry 
you asked now, aren't you?

[6] Which will be the year after 2007, which will be the year of Python 
3000. Or not, depending on whether Py3k is a dead parrot or not. I'm 
personally betting on "not". But not necessarily on 2007.
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From libintr at gmail.com  Sun Jan 28 02:25:01 2007
From: libintr at gmail.com (lee)
Date: 27 Jan 2007 23:25:01 -0800
Subject: import from future
Message-ID: <1169969100.946843.111770@p10g2000cwp.googlegroups.com>

what are the things that we can do with import from future usage.....i 
heard its very interesting......thanks



From donn at u.washington.edu  Thu Jan 18 17:26:35 2007
From: donn at u.washington.edu (Donn Cave)
Date: Thu, 18 Jan 2007 14:26:35 -0800
Subject: How to find out if another process is using a file
References: <eoo6vd$33u$1@gemini.csx.cam.ac.uk>
	<mailman.2878.1169141728.32031.python-list@python.org>
	<donn-66A101.12021118012007@gnus01.u.washington.edu>
	<eookeb$1ar$1@gemini.csx.cam.ac.uk>
Message-ID: <donn-DA887B.14263518012007@gnus01.u.washington.edu>

In article <eookeb$1ar$1 at gemini.csx.cam.ac.uk>,
 nmm1 at cus.cam.ac.uk (Nick Maclaren) wrote:
> In article <donn-66A101.12021118012007 at gnus01.u.washington.edu>,
> Donn Cave <donn at u.washington.edu> writes:
> |> In article <mailman.2878.1169141728.32031.python-list at python.org>,
> |>  "Gabriel Genellina" <gagsl-py at yahoo.com.ar> wrote:
> |> > "Tom Wright" <tew24 at spam.ac.uk> escribi? en el mensaje 
> |> > news:eoo6vd$33u$1 at gemini.csx.cam.ac.uk...

> |> > Use os.open with the O_EXCL flag; will fail if the other process has the 
> |> > file still open (and will fail if another process is reading the file, 
> |> > too, 
> |> > not just if someone is writing).
> |> 
> |> O_EXCL fails if the file exists at all - whether closed or open.
> 
> Yes.  In theory.  In practice, it usually works on normal files, provided
> that all opens are local.  Under some circumstances, it will even work
> for NFS mounted files, as far as I recall.

Mm, by "fail", I meant

An attempt to open with O_EXCL set will "fail" if the file exists at all,
i.e., the file will not be opened, a negative value will be returned,
and errno will be set to EEXIST.

What I neglected to mention is that this effect obtains when O_EXCL
is used in combination with O_CREAT.  Without O_CREAT, O_EXCL doesn't
mean anything and is ignored.

If there is any significant difference between theory and practice
in this matter, it's news to me.

   Donn


From tsuraan at gmail.com  Mon Jan  8 12:19:40 2007
From: tsuraan at gmail.com (tsuraan)
Date: Mon, 8 Jan 2007 11:19:40 -0600
Subject: Suitability for long-running text processing?
In-Reply-To: <4866bea60701080849h16d1dacew7a0abe950726c006@mail.gmail.com>
References: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>
	<c2701f5c0701080801w4d3c378elf901db19610a2e9e@mail.gmail.com>
	<84fb38e30701080813k1be616fch6d01922fb7a92fc5@mail.gmail.com>
	<c2701f5c0701080835o7013c43fm3e71e9b7d1a11329@mail.gmail.com>
	<4866bea60701080849h16d1dacew7a0abe950726c006@mail.gmail.com>
Message-ID: <84fb38e30701080919r41d52fb6nc5ee31f12e901ef3@mail.gmail.com>

> My first thought was that interned strings were causing the growth,
> but that doesn't seem to be the case.


Interned strings, as of 2.3, are no longer immortal, right?  The intern doc
says you have to keep a reference around to the string now, anyhow.  I
really wish I could find that thing I read a year and a half ago about
python never collecting small strings, but I just can't find it anymore.
Maybe it's time for me to go source diving...
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070108/59985b4a/attachment.html>

From tew24 at spam.ac.uk  Mon Jan 15 10:37:26 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Mon, 15 Jan 2007 15:37:26 +0000
Subject: Default event handlers in wxPython
Message-ID: <eog73m$22a$1@gemini.csx.cam.ac.uk>

Hi all

I'm writing my first wxPython app and am having a problem with event
handlers.  I've set up a multi-part status bar and would like all the
tooltips, menu help strings etc. to go into the second part of it.  Is
there some easy way of doing this?

I've not found one, so have set up the following for the menu:

 self.Bind(wx.EVT_MENU_HIGHLIGHT, self.OnMenuHighlight)

def OnMenuHighlight(self, event):
 self.SetStatusText(event.GetEventObject().GetHelpString(event.GetMenuId()),
                                                                        1)

...this works fine.  I've tried to set up the same for the toolbar:

 self.Bind(wx.EVT_TOOL_ENTER, self.OnToolbarHighlight)
def OnToolbarHighlight(self, event):
self.SetStatusText(event.GetEventObject().GetToolLongHelp(event.GetSelection()),
 1)

...and this doesn't work.  Well, it puts the text in the second part of the
toolbar as requested, but the default handler is still being called and
this messes up the first part of the toolbar which I want it to leave
alone.  How do I completely override the default handler for the toolbar?
This method worked fine for menus and I'm a bit stuck.

(ignore the indentation on the above examples - I know it's wrong, but long
lines and usenet don't mix)


-- 
I'm at CAMbridge, not SPAMbridge


From citronelu at yahoo.com  Sun Jan 28 18:37:26 2007
From: citronelu at yahoo.com (citronelu at yahoo.com)
Date: 28 Jan 2007 15:37:26 -0800
Subject: wxPython: panel not fully painted
In-Reply-To: <pan.2007.01.25.16.02.59.218097@spamhater.too>
References: <1169674550.837006.304370@q2g2000cwa.googlegroups.com>
	<pan.2007.01.25.16.02.59.218097@spamhater.too>
Message-ID: <1170027446.670921.140410@q2g2000cwa.googlegroups.com>

Thank you.



From melih.onvural at gmail.com  Wed Jan 31 00:43:13 2007
From: melih.onvural at gmail.com (Melih Onvural)
Date: 30 Jan 2007 21:43:13 -0800
Subject: Executing Javascript, then reading value
In-Reply-To: <LqNvh.1382$zH1.806@newssvr29.news.prodigy.net>
References: <1170103447.839304.44900@v33g2000cwv.googlegroups.com>
	<mailman.3277.1170104720.32031.python-list@python.org>
	<1170105229.984079.219180@l53g2000cwa.googlegroups.com>
	<LqNvh.1382$zH1.806@newssvr29.news.prodigy.net>
Message-ID: <1170222193.579676.282040@m58g2000cwm.googlegroups.com>

In fact what you're describing is exactly what I needed. I ended up
finding a way to execute the javascript using Rhino and then capturing
the
result. Not exactly what I wanted to do, but once I found it out, it
works.

Melih Onvural

On Jan 30, 2:57 pm, John Nagle <n... at animats.com> wrote:
> Melih Onvural wrote:
> > Thanks, let me check out this route, and then I'll post the results.
>
> > Melih Onvural
>
> > On Jan 29, 4:04 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
>
> >> On 29 Jan 2007 12:44:07 -0800, Melih Onvural <melih.onvu... at gmail.com>
> >> wrote:
>
> >>> I need to execute some javascript and then read the value as part of a
> >>> program that I am writing. I am currently doing something like
> >>> this:Python doesn't include a JavaScript runtime.  You might look into
> >>> the
>
> >> stand-alone Spidermonkey runtime.  However, it lacks the DOM APIs, so it
> >> may not be able to run the JavaScript you are interested in running. There
> >> are a couple other JavaScript runtimes available, at least.  If
> >> Spidermonkey is not suitable, you might look into one of them.
>
>     This is getting to be a common problem.  One used to be able to
> look at web pages from a program by reading the HTML.  Now you need to
> load the page into a browser-like environment, run at least the
> OnLoad JavaScript, and then start looking at the document object module.
> This requires a browser emulator, a browser without a renderer.
> Useful for spam filters and such.
>
>      It's not clear if the original poster needs that much capability,
> though.
>
>                                 John Nagle




From gert.cuykens at gmail.com  Mon Jan 15 17:41:03 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Mon, 15 Jan 2007 23:41:03 +0100
Subject: whats wrong with my reg expression ?
Message-ID: <ef60af090701151441j2dbc2308ka8f326a181b6bba8@mail.gmail.com>

 rex2=re.compile('^"(?P<value>[^]*)"$',re.M)

  File "/usr/lib/python2.5/re.py", line 180, in compile
    return _compile(pattern, flags)
  File "/usr/lib/python2.5/re.py", line 233, in _compile
    raise error, v # invalid expression
sre_constants.error: unexpected end of regular expression

?


From msj at infoserv.dk  Fri Jan  5 12:44:03 2007
From: msj at infoserv.dk (msj at infoserv.dk)
Date: 5 Jan 2007 09:44:03 -0800
Subject: MySQLdb windows binaries for Python 2.5?? Yes,
	but from a World of Warcraft guild.
In-Reply-To: <jOrgh.13632$wc5.10963@newssvr25.news.prodigy.net>
References: <1162408100.985370.148650@m7g2000cwm.googlegroups.com>
	<1163238145.257490.144410@b28g2000cwb.googlegroups.com>
	<mailman.2093.1163244341.11739.python-list@python.org>
	<Fgkgh.9311$hI.6215@newssvr11.news.prodigy.net>
	<Ulmgh.70$u%4.58@newsfe04.lga>
	<1166144355.616642.127080@n67g2000cwd.googlegroups.com>
	<x1pgh.9356$hI.3075@newssvr11.news.prodigy.net>
	<jOrgh.13632$wc5.10963@newssvr25.news.prodigy.net>
Message-ID: <1168019043.523288.50770@38g2000cwa.googlegroups.com>

Anyone have a binary they want to share?

/Martin



From sndive at gmail.com  Tue Jan 23 21:22:58 2007
From: sndive at gmail.com (sndive at gmail.com)
Date: 23 Jan 2007 18:22:58 -0800
Subject: What's the reverse of Py_BuildValue("u#" ?
Message-ID: <1169605378.718701.229310@d71g2000cwa.googlegroups.com>

How could I get the pointer to and the length of ucs2 array out of a
PyObject representing
a string? Something that works whether PyObject string is in unicode or
not.

Also could I replace a sequence

    if(PyBool_Check(obj)) {
...
    }
    if(PyString_Check(obj)) { // would this be true for any string
type?
...
    }
    if(PyFloat_Check(obj)) {
...

with a switch?

Thank you!



From arkanes at gmail.com  Wed Jan 24 10:36:40 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 24 Jan 2007 09:36:40 -0600
Subject: Rendering text question (context is MSWin UI Automation)
In-Reply-To: <ep7qoe$jdg$1@sea.gmane.org>
References: <45b6231b$1_2@news.bluewin.ch>
	<4866bea60701230724y3a51bc31p9970075f99b70d05@mail.gmail.com>
	<ep7qoe$jdg$1@sea.gmane.org>
Message-ID: <4866bea60701240736v837d246w187ecb1ccb90eefd@mail.gmail.com>

On 1/24/07, Boris Borcic <bborcic at gmail.com> wrote:
> Chris Mellon wrote:
> >
> > Using either win32 or wxPython you will be able to produce bitmaps
> > directly, without needing to create a visible window.
> >
> >
> > Some quick & dirty wxPython code
> >
> > def getTextBitmap(text, font, fgcolor, bgcolor):
> >     dc = wx.MemoryDC()
> >     dc.SetFont(font)
> >     width, height= dc.GetTextExtent(text)
> >     bmp = wx.EmptyBitmap(width, height)
> >     dc.SelectObject(bmp)
> >     dc.SetBackground(wx.Brush(bgcolor))
> >     dc.Clear()
> >     dc.SetTextBackground(bgcolor)
> >     dc.SetTextForeground(fgcolor)
> >     dc.DrawText(text, 0, 0)
> >     dc.SelectObject(wx.NullBitmap)
> >     return bmp
> >
> >
> > Raw win32 code will look similar but will be much more verbose.
>
> Thx again for this base.
>
> Quickly testing this, it appears that the result is rendered half a pixel off in
> the x-direction. Does this make sense ? Is it possible to position text with
> subpixel accuracy ?
>

The GDI text api, which is what wx is wrapping here, only provides
pixel accuracy. You are probably seeing a kerning effect from your
chosen font and perhaps the effects of ClearType.


From http  Wed Jan 10 08:30:47 2007
From: http (Paul Rubin)
Date: 10 Jan 2007 05:30:47 -0800
Subject: Is there a way to protect a piece of critical code?
References: <mailman.2524.1168424917.32031.python-list@python.org>
Message-ID: <7xac0rovp4.fsf@ruckus.brouhaha.com>

"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
> I would like to do the following as one atomic operation:
> 
> 1) Append an item to a list
> 2) Set a Boolean indicator

You could do it with locks as others have suggested, but maybe you
really want the Queue module.


From mail at microcorp.co.za  Thu Jan 18 00:27:43 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 18 Jan 2007 07:27:43 +0200
Subject: Class data members in C
References: <eojhuu$72c$1@gemini.csx.cam.ac.uk><mailman.2814.1169026003.32031.python-list@python.org>
	<eokrds$pta$1@gemini.csx.cam.ac.uk>
Message-ID: <000001c73ac8$a25fb540$03000080@hendrik>

"Nick Maclaren" <nmm1 at cus.cam.ac.uk> wrote:


> 
> In article <mailman.2814.1169026003.32031.python-list at python.org>,
> "Hendrik van Rooyen" <mail at microcorp.co.za> writes:
> |> > 
> |> > Hmm.  The extensions documentation describes how to add instance
> |> > members to a class (PyMemberDef), but I want to add a class member.
> |> > Yes, this is constant for all instances of the class.
> |> 
> |> When? - at time of defining base class, between class definition and
> |> first instance, at time of creating instance, or after instance creation?
> |> 
> |> After instance creation is not easy, I think you would have to add 
> |> to each instance... 
> 
> Oh, one of the first two - I am not bonkers!  Changing a class after
> instance creation is guaranteed to cause confusion, if nothing else.
> 
*grin* - its also just about impossible to do, if you try to imagine
what you would have to do to all instances when you effectively
change the __init__ method.  And some people expect it to happen
automagically...

Sorry I can't be of more help. All of the docs I have read essentially
talk about changing instances.  From a practical point of view I would 
say: "Just redefine it".  But that is not very helpful. Specially if you are
mucking about in C, as your title suggests...

<off topic language note>

It has never struck me before that the root word for
"madness" and the slang for "copulation" is the same.
I wonder if there is some sort of a message here?

<end>

- Hendrik



From exarkun at divmod.com  Wed Jan 17 11:44:04 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 17 Jan 2007 11:44:04 -0500
Subject: Globbing files by their creation date
In-Reply-To: <1169051467.179899.178570@s34g2000cwa.googlegroups.com>
Message-ID: <20070117164404.11447.422170313.divmod.quotient.19758@ohm>

On 17 Jan 2007 08:31:07 -0800, tkpmep at hotmail.com wrote:
>
>Thanks a mill - os.path.getctime(f) is what I needed. Unfortunately, my
>attempts to turn the integer it returns into a date have failed.
>
>>>> os.path.getctime(fn)    #fn was created today, 1/17/2007
>1168955503
>
>I tried to convert this to a date object by typing
>>>>datetime.date.fromordinal(1168955503)
>
>Traceback (most recent call last):
>  File "<pyshell#9>", line 1, in -toplevel-
>    datetime.date.fromordinal(1168955503)
>ValueError: year is out of range
>
>How can I do the conversion? I'm trying to identify all files that were
>created after YYYY/MM/DD.
>
>For a quick sanity check, I ran
>>>> datetime.date.today().toordinal()
>732693
>
>which is orders of magnitude smaller than the number returned by
>os.path.getctime(fn).
>
>Thanks in advance for your help

Ordinals are unrelated to the values given back by getctime.  Try something
like this instead:

  exarkun at charm:~$ python
  Python 2.4.3 (#2, Oct  6 2006, 07:52:30)
  [GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import os
  >>> import datetime
  >>> datetime.date.fromtimestamp(os.path.getctime('.'))
  datetime.date(2007, 1, 17)
  >>>
  exarkun at charm:~$ ls -ld .
  drwxr-xr-x 93 exarkun exarkun 8192 2007-01-17 10:34 .
  exarkun at charm:~$

Jean-Paul


From ptmcg at austin.rr.com  Tue Jan 23 14:54:16 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 23 Jan 2007 11:54:16 -0800
Subject: Simple Matrix class
Message-ID: <1169582056.315098.267950@k78g2000cwa.googlegroups.com>

I've posted a simple Matrix class on my website as a small-footprint
package for doing basic calculations on matrices up to about 10x10 in
size (no theoretical limit, but performance on inverse is exponential).
 Includes:
- trace
- transpose
- conjugate
- determinant
- inverse
- eigenvectors/values (for symmetric matrices)
- addition and multiplication (with constant or other matrix)

Matrices are easily built from formatted strings, as in:

m = Matrix(  """1 2 3 4
                5 11 20 3
                2 7 11 1
                0 5 3 1""")

Pretty much a no-strings-attached license, just don't hassle me about
little things like warranty, support, merchantability, accuracy, etc.
See it at
http://www.geocities.com/ptmcg/python/index.html#matrix_py

-- Paul



From bdesth.quelquechose at free.quelquepart.fr  Tue Jan  9 18:14:48 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 10 Jan 2007 00:14:48 +0100
Subject: Python - C# interoperability
In-Reply-To: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>
References: <1168378200.620839.189750@i39g2000hsf.googlegroups.com>
Message-ID: <45a41b98$0$321$426a74cc@news.free.fr>

mc a ?crit :
> Is there an easy way to compile a Python class (or set of classes) into
> a .DLL that a C# program can call?  Or otherwise to use an existing
> library of Python classes from a C# program as seamlessly as possible?
> 
I can't tell if that'll do, but have you looked at IronPython ?


From jweida at gmail.com  Sat Jan 27 17:43:57 2007
From: jweida at gmail.com (Jerry)
Date: 27 Jan 2007 14:43:57 -0800
Subject: Hi, I'm new to python
In-Reply-To: <1169905027.776723.194140@a75g2000cwd.googlegroups.com>
References: <1169905027.776723.194140@a75g2000cwd.googlegroups.com>
Message-ID: <1169937837.925954.109310@a75g2000cwd.googlegroups.com>

I would definitely suggest checking out the documentation at http://
www.python.org/doc/.  Also, you can check out the free book Dive into 
Python at http://www.diveintopython.org.  It provides a great overview 
starting at the very beginning.  I found it great and hope to buy it 
soon to support the author.

Python is considered a general-purpose language (so is Perl by the 
way.)  It can handle anything from processing text, to running as an 
application server (check out http://www.zope.com.)  You can also use 
pieces of it for web programming.  In fact, if you've heard of Ruby on 
Rails, then you can see a similar Python project called TurboGears at 
http://www.turbogears.com.  If you only need a web framework, then you 
can also check out Django (http://www.djangoproject.com) and many 
other projects designed for getting a web-based application up and 
running quickly.

Not to leave you with the impression that it's really only suited for 
web stuff, there is also Pygame (http://www.pygame.com), a library and 
bindings to SDL so you can write your own games.  I am currently 
learning Pygame with OpenGL and writing a simple clone of SpaceWars.

I've also written a Jabber bot in Python for use where I used to 
work.  You can use Python for systems automation as well.  I wrote a 
small applet that opened SSH connections to every server in a list and 
then sent all the text you typed into a single box to all servers at 
the same time.

I'm currently learning how to use Python with osascript to control 
applications in Mac OS X and have dabbled a little with the win32com 
stuff to have Python control some aspects of Windows.

As you can see, it's an extremely versatile language and is really 
only limited by your imagination.

There are some things that it doesn't do so well, but for the most 
part, those things have solutions.  For example, Python is typically 
slower than other languages when you must iterate over something many 
times.  For example, in game programming, to iterate over the entire 
list of objects in the world to update their positions or draw them.  
Many times things like this can be moved into C libraries to make then 
run faster.  I myself haven't had many problems with this at all.  In 
fact, none of my iteration code is in C for my game.

Well, that's enough rambling for me.  I've turned this post into a 
commercial for Python.  I hope that I've left you with enough ideas to 
get started in the language.

--
Jerry H



From davidh at ilm.com  Tue Jan 16 18:05:19 2007
From: davidh at ilm.com (David Hirschfield)
Date: Tue, 16 Jan 2007 15:05:19 -0800
Subject: Help: asyncore/asynchat and terminator string
Message-ID: <45AD5A2F.7060701@ilm.com>

I'm implementing a relatively simple inter-application communication 
system that uses asyncore/asynchat to send messages back and forth.

The messages are prefixed by a length value and terminator string, to 
signal that a message is incoming, and an integer value specifying the 
size of the message, followed by the message data.

My question is: how can I produce a short terminator string that won't 
show up (or has an extremely small chance of showing up) in the binary 
data that I send as messages?

Frankly, I'm not so sure this is even an important question, but is 
nagging me. If my communication is a kind of state machine:

sender: sends message length value, followed by terminator string, 
followed by message data
receiver: waiting for terminator string via set_terminator(<terminator 
string>)
    continually save what comes in via collect_incoming_data()
receiver: when sender's message arrives, found_terminator() is called
    pull message length from previously received data
    set terminator to be the length of the message via 
set_terminator(<message length>)
receiver: collect_incoming_data() collects the message data
receiver: found_terminator() called when full message length is read, 
receiver goes back to waiting for message terminator string

I hope I explained that clearly enough.

The only time I can conceive that the system will get confused by 
finding a terminator string in the binary data of the message is if 
something goes haywire and I end up looking for a terminator string when 
the other side is sending the message data. What gotchas do I need to 
look out for here? I'm not a networking person, so I'm relying on the 
underlying libraries to be stable and just let me handle the high-level 
stuff here. This isn't going to be used in a malicious environment, the 
only thing I have to contend with is network hiccups...nobody is 
actively going to try and break this system.

Any advice/help would be appreciated,
-Dave

-- 
Presenting:
mediocre nebula.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Jan 12 12:01:31 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 12 Jan 2007 18:01:31 +0100
Subject: What about this?
References: <1168525050.536736.74590@i39g2000hsf.googlegroups.com>
	<50n9kcF1g30l4U2@mid.individual.net>
	<1168612073.635206.84620@s34g2000cwa.googlegroups.com>
Message-ID: <50pt7bF1h5hj5U3@mid.individual.net>

Dr. Who wrote:

> What's more amazing is that anyone would click on the link at all
> given the increasing number of website that provide hidden content
> that tries to deliver spyware or viruses just by getting visitors.

How could active input reach *me* if I just fed the W3C validator
with the URL?

Regards,


Bj?rn

-- 
BOFH excuse #184:

loop found in loop in redundant loopback



From pwatson at redlinepy.com  Thu Jan  4 13:25:03 2007
From: pwatson at redlinepy.com (Paul Watson)
Date: Thu, 04 Jan 2007 12:25:03 -0600
Subject: what is this?
In-Reply-To: <mailman.2289.1167928928.32031.python-list@python.org>
References: <mailman.2289.1167928928.32031.python-list@python.org>
Message-ID: <504v40F1ebv3sU1@mid.individual.net>

Eric Price wrote:
> Hello;
> I'm studying some code examples from the python cookbook site. I came 
> across this:
> 
> def colsplit(l, cols):
>    rows = len(l) / cols
>    if len(l) % cols:
>        rows += 1
>    m = []
>    for i in range(rows):
>        m.append(l[i::rows])
>    return m
> 
> What I'd like to know is what is the double colon? What does it do?
>        m.append(l[i::rows])
> 
> Thanks,
> Eric

http://docs.python.org/tut/tut.html
http://docs.python.org/tut/node5.html#SECTION005140000000000000000
http://docs.python.org/ref/slicings.html

Probably most helpful to you is:

http://developer.mozilla.org/es4/proposals/slice_syntax.html


From Bob.Sidebotham at gmail.com  Fri Jan 12 09:17:01 2007
From: Bob.Sidebotham at gmail.com (Bob.Sidebotham at gmail.com)
Date: 12 Jan 2007 06:17:01 -0800
Subject: context managers and co-routines
Message-ID: <1168611420.448058.163860@11g2000cwr.googlegroups.com>

I'm happily using context managers and co-routines, and would like to
use both at the same time, e.g.

    with foo():
        ...
        x = yield y
        ...

In this code multiple copies of this code can be executing at the
"same" time, interleaved by the yield statement. This doesn't work
well, since the context manager is dealing with global state
(specifically, re-routing stdout).

The problem is that all of my state (local variables, etc.) is nicely
saved over the yield, but the context is not. So I end up having to
write the code like this:

    with foo():
        ...
    x = yield y
    with foo():
        ...

which is not so pretty. What I'd like is some way to transparently save
and restore context over a yield, but I don't see an easy way to do
this.

Any suggestions?

Thanks,
Bob Sidebotham



From simon at brunningonline.net  Fri Jan 12 14:30:17 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 12 Jan 2007 19:30:17 +0000
Subject: I need to consume a .NET web service in a Python client
In-Reply-To: <1168629081.271619.316370@s34g2000cwa.googlegroups.com>
References: <1168626439.257622.134700@38g2000cwa.googlegroups.com>
	<1168629081.271619.316370@s34g2000cwa.googlegroups.com>
Message-ID: <8c7f10c60701121130r270c0948sc5e9c3780cc45626@mail.gmail.com>

On 12 Jan 2007 11:11:21 -0800, Ravi Teja <webraviteja at gmail.com> wrote:
> Start Here
> http://www.diveintopython.org/soap_web_services/index.html
> Example Client
> http://www.diveintopython.org/soap_web_services/first_steps.html

Sadly, SOAPpy doesn't seem to be maintained any more. I'd take a look
at ZSI, instead.

<http://tinyurl.com/ylas4k>

-- 
Cheers,
Simon B
simon at brunningonline.net


From steve at REMOVE.THIS.cybersource.com.au  Mon Jan  1 00:37:53 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 01 Jan 2007 16:37:53 +1100
Subject: OO question
References: <1167623232.105052.203550@42g2000cwt.googlegroups.com>
Message-ID: <pan.2007.01.01.05.37.52.466540@REMOVE.THIS.cybersource.com.au>

On Sun, 31 Dec 2006 19:47:12 -0800, fejkadress wrote:

> I want to make an addressbook and I'm new to OO programming, so I
> wonder if this sounds reasonable.
> 
> I think of making a class Address which contains all data about one
> person, that class can have UserDict as baseclass so I can access data
> like object['name'], etc..

If you are using Python 2.2 or greater, you can inherit from dict:


>>> class Address(dict):
...     pass
...
>>> fred = Address({"address": "123 smith street"})
>>> fred['address']
'123 smith street'


But ask yourself, what benefit do you gain by subclassing dict? Why not
just use a dict?

If this is a learning exercise, then sure, go for it, subclass away! But
if this is meant to be real code, then consider what benefits and costs
using OO will give you, compared to a function-based approach.

(Please don't assume that this is a thinly veiled hint that OO is the
wrong approach. It isn't.)


> Then maybe I can have a class AddressBook which has a list that
> contains all those Address objects.
> Does that sound reasonable?

Again, why create an AddressBook class? Why not just have a list of
Addresses?



> And then the real reason that I posted here is:
> If I want to save all addresses to disk, I can have a method, say,
> save() of AddressBook. But then what? What is a good object oriented
> approach? Should each Address object take care of saving itself to the
> file, with a method like writetofile(filename), or should the class
> AddressBook take care of the saving and ask each object for its data?



Here's one approach, assuming that AddressBook is merely a list of
Addresses and that the Address class knows how to write to an open file
object:

def save(list_of_addresses, filename):
    f = file(filename, "w")
    for address in list_of_addresses:
        address.save(f)
    f.close()

Here's a more pure OO approach to do the same thing:

class AddressBook(object):
    def __init__(self, list_of_addresses):
        self.addresses = list_of_addresses

    def save(self, filename):
        f = file(filename, "w")
        for address in self.addresses:
            address.save(f)
        f.close()

Here's a third approach:

class AddressBook(object):
    def __init__(self, list_of_addresses):
        self.addresses = list_of_addresses
        self.currentfile = None

    def save_one_address(self, data):
        data = do_something_with(data)
        self.currentfile.write(data)

    def save(self, filename):
        self.currentfile = file(filename, "w")
        for address in self.addresses:
            self.save_one_address(address.export())
        self.currentfile.close()
        self.currentfile = None


-- 
Steven.



From oliphant.travis at ieee.org  Fri Jan 12 00:59:43 2007
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Thu, 11 Jan 2007 22:59:43 -0700
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
In-Reply-To: <1168458486.538863.316130@k58g2000hse.googlegroups.com>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
Message-ID: <eo77rt$cqp$1@sea.gmane.org>

oyekomova wrote:
> Thanks for your help. I compared the following code in NumPy with the
> csvread in Matlab for a very large csv file. Matlab read the file in
> 577 seconds. On the other hand, this code below kept running for over 2
> hours. Can this program be made more efficient? FYI - The csv file was
> a simple 6 column file with a header row and more than a million
> records.
> 
> 

There is some facility to read simply-formatted files directly into NumPy.

You might try something like this.

numpy.fromfile('somename.csv', sep=',')

and then reshape the array.

-Travis



From robert.kern at gmail.com  Tue Jan 23 22:54:42 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 23 Jan 2007 21:54:42 -0600
Subject: easy_install pylons failure - www.myghty.org unavailable
In-Reply-To: <17846.54389.27457.383902@montanaro.dyndns.org>
References: <17846.54389.27457.383902@montanaro.dyndns.org>
Message-ID: <ep6la3$mrh$1@sea.gmane.org>

skip at pobox.com wrote:

> Is it not able to get past this point because there is only one source for
> Myghty or does it always need to go to a package's home page?  I was able to
> work around this by manually downloading the Myghty-1.1.tar.gz file and
> installing it.

Asking on Distutils-SIG list will be more likely to get Phillip Eby's attention.
It surprises me that setuptools didn't pick up the tarball on the CheeseShop.

  http://mail.python.org/mailman/listinfo/distutils-sig

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From researchbase at gmail.com  Sat Jan 20 01:09:07 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Sat, 20 Jan 2007 11:39:07 +0530
Subject: confused on python rpc with apache, is it possible?
In-Reply-To: <51ce8uF1k0tl5U1@mid.uni-berlin.de>
References: <mailman.2912.1169227938.32031.python-list@python.org>
	<51ce8uF1k0tl5U1@mid.uni-berlin.de>
Message-ID: <f81479dd0701192209w577ea6f7h2ff2e5b69aba2a12@mail.gmail.com>

On 19/01/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
>
> I'm unclear why you want the apache in there in the first place. Why don't
> you just create an e.g. twisted-based XMLRPC-server, and simply let that
> run? What is the apache intended for?


twisted-based? what is that?  what is that.
I am very new to xml-rpc so my questions may sound very basic.
any ways apache is doing nothing in there but I thought that if some
thing needs to be done in php in the future then apache better be
there but as I said that is no need if pythone can do it on a stand
alone basis.


From manstey at csu.edu.au  Tue Jan 30 01:02:45 2007
From: manstey at csu.edu.au (manstey)
Date: 29 Jan 2007 22:02:45 -0800
Subject: parent-child object design question
Message-ID: <1170136965.015119.225920@q2g2000cwa.googlegroups.com>

Hi,

I am having trouble designing my classes.

I have two classes. The first one wraps around an old-style class 
called oref


Class CacheClass(object):
    def __init__(self, obj):
        self.__data = obj
    def __getattr__(self, attr):
        return getattr(self.__data, attr)

The second class is much the same, also wrapping, but has some 
attributes.

class CacheProperty(object):
    def __init__(self, obj, dicProperties={}):
        self.__data = obj
        lisProperties=[]
        for key, val in dicProperties.iteritems():
            setattr(self, key, val)
            lisProperties.append(key)
        self.Properties = lisProperties
    def __getattr__(self, attr):
        return getattr(self.__data, attr)

Here is my code:

>>> MyClass = CacheClass(oref)
>>> MyProperty = CacheProperty(oref2,{'Name':'Surname', 'Value':'Peter'})
>>> setattr(MyClass,MyProperty.Name,MyProperty)

Now, the problem is that I want a method MyClass.MyProperty.Save() to 
save the value of MyClass.MyProperty to the database backend on disk, 
but the code for this is part of the wrapped oref code, and thus is 
invoked only by MyClass.set(MyProperty.Name,MyProperty.Value).

How can I access this method inside the MyProperty class?

I hope this is clear!

regard,s
matthew



From ljz at asfast.com  Sat Jan  6 15:44:26 2007
From: ljz at asfast.com (Lloyd Zusman)
Date: Sat, 06 Jan 2007 15:44:26 -0500
Subject: Recommended way to force a thread context switch?
References: <GzOnh.112$a81.91@nntpserver.swip.net>
	<1168103258.602286.146100@42g2000cwt.googlegroups.com>
	<1168104008.910681.46800@38g2000cwa.googlegroups.com>
Message-ID: <874pr3navp.fsf@asfast.com>

I have a python (2.5) program with number of worker threads, and I want
to make sure that each of these does a context switch at appropriate
times, to avoid starvation.  I know that I can do a time.sleep(0.001) to
force such a switch, but I'm wondering if this is the recommended
method.

Thanks in advance.


-- 
 Lloyd Zusman
 ljz at asfast.com
 God bless you.



From wuwei23 at gmail.com  Wed Jan 24 19:49:02 2007
From: wuwei23 at gmail.com (alex23)
Date: 24 Jan 2007 16:49:02 -0800
Subject: Question about docutils
In-Reply-To: <45b7fca1$0$49206$14726298@news.sunsite.dk>
References: <45b7fca1$0$49206$14726298@news.sunsite.dk>
Message-ID: <1169686142.135007.127760@m58g2000cwm.googlegroups.com>

On Jan 25, 10:40 am, Damjan <gdam... at gmail.com> wrote:
> I'm using docutils 0.4.
> Is it possible to define special custom 'tags' (or something) that will
> invoke my own function? The function would then return the real content in
> the ReST document.

I -think- this is what you're looking for:
http://docutils.sourceforge.net/docs/howto/rst-roles.html

Hope it helps.

-alex23



From ziga.seilnacht at gmail.com  Sun Jan 14 19:49:00 2007
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 14 Jan 2007 16:49:00 -0800
Subject: Conflicting needs for __init__ method
References: <1168817555.850650.261660@s34g2000cwa.googlegroups.com>
Message-ID: <1168822140.799071.153390@s34g2000cwa.googlegroups.com>

Mark wrote:

[a lot of valid, but long concerns about types that return
 an object of their own type from some of their methods]

I think that the best solution is to use an alternative constructor
in your arithmetic methods. That way users don't have to learn about
two different factories for the same type of objects. It also helps
with subclassing, because users have to override only a single method
if they want the results of arithmetic operations to be of their own
type.

For example, if your current implementation looks something like
this:

    class Rational(object):

        # a long __init__ or __new__ method

        def __add__(self, other):
            # compute new numerator and denominator
            return Rational(numerator, denominator)

        # other simmilar arithmetic methods


then you could use something like this instead:

    class Rational(object):

        # a long __init__ or __new__ method

        def __add__(self, other):
            # compute new numerator and denominator
            return self.result(numerator, denominator)

        # other simmilar arithmetic methods

        @staticmethod
        def result(numerator, denominator):
            """
            we don't use a classmethod, because users should
            explicitly override this method if they want to
            change the return type of arithmetic operations.
            """
            result = object.__new__(Rational)
            result.numerator = numerator
            result.denominator = denominator
            return result


Hope this helps,
Ziga



From tsuraan at gmail.com  Mon Jan  8 14:16:07 2007
From: tsuraan at gmail.com (tsuraan)
Date: Mon, 8 Jan 2007 13:16:07 -0600
Subject: Suitability for long-running text processing?
In-Reply-To: <4866bea60701080927r4dedd392o38d45660864a8717@mail.gmail.com>
References: <84fb38e30701080741n1579e5f5h18f4f068c343a11f@mail.gmail.com>
	<c2701f5c0701080801w4d3c378elf901db19610a2e9e@mail.gmail.com>
	<84fb38e30701080813k1be616fch6d01922fb7a92fc5@mail.gmail.com>
	<c2701f5c0701080835o7013c43fm3e71e9b7d1a11329@mail.gmail.com>
	<4866bea60701080849h16d1dacew7a0abe950726c006@mail.gmail.com>
	<84fb38e30701080919r41d52fb6nc5ee31f12e901ef3@mail.gmail.com>
	<4866bea60701080927r4dedd392o38d45660864a8717@mail.gmail.com>
Message-ID: <84fb38e30701081116n1dd8c6e3g2df74d1601902a9d@mail.gmail.com>

> I remember something about it coming up in some of the discussions of
> free lists and better behavior in this regard in 2.5, but I don't
> remember the details.


Under Python 2.5, my original code posting no longer exhibits the bug - upon
calling del(a), python's size shrinks back to ~4 MB, which is its starting
size.  I guess I'll see how painful it is to migrate a gentoo system to
2.5... Thanks for the hint :)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070108/b855dc85/attachment.html>

From ptmcg at austin.rr._bogus_.com  Fri Jan  5 08:47:33 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 5 Jan 2007 07:47:33 -0600
Subject: Draw rectangle on a Window DC
References: <459cd1e4.0232d77c.0893.ffff821d@mx.google.com>
	<mailman.2300.1167963723.32031.python-list@python.org>
Message-ID: <459e56f5$0$27069$4c368faf@roadrunner.com>

"Gabriel Genellina" <gagsl-py at yahoo.com.ar> wrote in message 
news:mailman.2300.1167963723.32031.python-list at python.org...
> At Thursday 4/1/2007 07:07, Raymond wrote:
>
>>I want to Draw rectangle on Dc when gived a position. Can you teach me? 
>>Let me view your code?
>
> This is more a Windows question. See 
> http://msdn.microsoft.com/library/en-us/gdi/rectangl_4b03.asp
>
> py>from win32gui import GetDC
> py>hdc=GetDC(0)
> py>from win32gui import Rectangle
> py>Rectangle(hdc, 100,100, 300,300)
> py>ReleaseDC(hdc,0)
> 0
> py>
>
> You should see a white square on your screen.
>

Nice example.  First line should be:

from win32gui import GetDC, ReleaseDC

-- Paul 




From michele.simionato at gmail.com  Mon Jan 29 03:53:00 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 29 Jan 2007 00:53:00 -0800
Subject: Web File System
In-Reply-To: <1170059509.601069.153290@q2g2000cwa.googlegroups.com>
References: <1170059509.601069.153290@q2g2000cwa.googlegroups.com>
Message-ID: <1170060780.314106.316160@v45g2000cwv.googlegroups.com>

On Jan 29, 9:31 am, anthony.cutr... at gmail.com wrote:
> Hi group,
>
> I have a development with a file system in Python, accessible from a
> graphic web application.
>
> I mustn't use an NTFS or EXT3 system, because those are not adapted
> for my use. Indeed, I would like my system to be able to recover
> files, and get precedent versions. I also want it to index words
> contained in files, to search with these.
>
> Files and folders have to be in an SQL database, mounted in ext3-like
> system. File would be identified by a single ID, and links with names
> should be connected on these IDs.
>
> Somebody have already worked (in Python) about this kind of things ?
> is there a publicly available framework or toolkit ?
>
> thanks

I do not understand extractly what you are asking, but do you know 
about WebDAV?
I would give a look to Content Management Systems such as Zope for 
this kind of things.

      Michele Simionato



From macsareback at mac.com  Tue Jan 30 10:27:59 2007
From: macsareback at mac.com (Daniel kavic)
Date: Tue, 30 Jan 2007 07:27:59 -0800
Subject: Please take me off the list
Message-ID: <B40EE572-0110-1000-9DC8-F4C4A789181E-Webmail-10019@mac.com>

Sorry to waste email space , but I wish to be off this list because I have tried python and it is too difficult for me.

-Dan


From sturlamolden at yahoo.no  Mon Jan  8 18:25:39 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 8 Jan 2007 15:25:39 -0800
Subject: Why less emphasis on private data?
In-Reply-To: <pjvoh.192$cQ2.1@read3.inet.fi>
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<1168188427.144219.206490@s80g2000cwa.googlegroups.com>
	<%Isoh.22447$X97.12337@newsfe18.lga>
	<slrneq4nqc.k8.horpner@FIAD06.norwich.edu>
	<pjvoh.192$cQ2.1@read3.inet.fi>
Message-ID: <1168298739.053287.197780@51g2000cwl.googlegroups.com>


Jussi Salmela wrote:

> To surlamolden: I don't know how you define private, but if one defines
> in C an external static variable i.e. a variable outside any functions,
> on the file level, the scope of the variable is that file only.

Sure, in C you can hide instances inside an object image by declaring
them static. But the real virtue of static declarations is to assist
the compiler.

My definition of 'private' for this thread is the private attribute
provided by C++, Java and C#. When I program C I use another idiom,

   /* THIS IS MINE, KEEP YOUR PAWS OFF */

and it works just as well. The same idiom works for Python as well.







> To hg: One does not need in C the static keyword to make a variable
> defined inside a function i.e. a so called 'automatic variable' private
> to that test. Automatic variables are private to their function by
> definition. The static keyword makes the variable permanent i.e. it
> keeps its value between calls but it is of course private also.
>
> To Neil Cerutti: If a programmer in C has got a pointer to some piece of
> memory, that piece is at the mercy of the programmer. There's no data
> hiding at all in this case.
>
> To whom it may concern: please stop comparing C and Python with regard
> to privacy and safety. They are two different worlds altogether. Believe
> me: I've been in this world for 2.5 years now after spending 19 years in
> the C world.
> 
> Cheers,
> Jussi



From jtravs at gmail.com  Tue Jan  9 13:46:15 2007
From: jtravs at gmail.com (jtravs at gmail.com)
Date: 9 Jan 2007 10:46:15 -0800
Subject: distutils and ctypes
Message-ID: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>

Hi all,

I suspect that I'm doing something stupid, I would like some other
opinions though.
I'm getting started with ctypes and am trying to use distutils to help
build my module. At the moment I simply want distutils to build a
shared c library (not a python extension!). Under linux, the following
works, under windows xp id doesn't (which I guess is obvious, but the
linux success lead me on).
I have two files at the moment...

/* begin test.c */
int test(int i)
{
    return i*i;
}
/* end test.c */

#begin setup.py
from distutils.core import setup, Extension
setup(name="test", version="0.0", ext_modules = [Extension("test",
["test.c"])])
# end setup.py

If I run:

python setup.py build

under linux, I get a nice shared c library under my build dir, which
can be imported by ctypes.
If I run it under windows I get the following:

running build
running build_ext
building 'test' extension
C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\link.exe
/DLL /nologo /INCREMENTAL:NO /LIBPATH:C:\Python25\libs
/LIBPATH:C:\Python25\PCBuild /EXPORT:inittest
build\temp.win32-2.5\Release\test.obj /OUT:build\lib.win32-2.5\test.pyd
/IMPLIB:build\temp.win32-2.5\Release\test.lib
LINK : error LNK2001: unresolved external symbol inittest
build\temp.win32-2.5\Release\test.lib : fatal error LNK1120: 1
unresolved externals
LINK : fatal error LNK1141: failure during build of exports file

I can see the problem: python is trying to build an extension module
and is telling the linker to export "inittest", which doesn't exist.
This didn't happen under linux as you don't need to export interfaces
in shared c libraries on linux.

So finally, my question is, is there a way to get distutils to simply
build a shared library on windows so that I can use ctypes with them???

Thanks for your patience with this post, and thanks for any replies.
Best regards,
John Travers



From skip at pobox.com  Wed Jan 24 12:33:15 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 24 Jan 2007 11:33:15 -0600
Subject: The reliability of python threads
In-Reply-To: <45B7904B.90303@mvista.com>
References: <45B7904B.90303@mvista.com>
Message-ID: <17847.39003.410596.481072@montanaro.dyndns.org>


    Carl> Does anyone have any conclusive evidence that python threads/locks
    Carl> are safe or unsafe?

In my experience Python threads are generally safer than the programmers
that use them. ;-)

Skip


From cjw at sympatico.ca  Sun Jan 14 09:39:30 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 14 Jan 2007 09:39:30 -0500
Subject: Comparing a matrix (list[][]) ?
In-Reply-To: <1168730648.038901.187460@v45g2000cwv.googlegroups.com>
References: <1168730648.038901.187460@v45g2000cwv.googlegroups.com>
Message-ID: <eodfb8$ag2$1@sea.gmane.org>

jairodsl wrote:
> Hi,
> 
> How can I find the minus element greater than zero in a matrix, my
> matrix is
> 
> matrix=
> [9,8,12,15],
> [0,11,15,18],
> [0,0,10,13],
> [0,0,0,5]
> 
> I dont want to use "min" function because each element in the matrix is
> associated to (X,Y) position.
> 
> Thanks a lot.
> 
> jDSL
> 

You might consider numarray or numpy for this sort of thing.

Colin W.



From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 27 18:51:48 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 28 Jan 2007 10:51:48 +1100
Subject: assertions to validate function parameters
References: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
	<1169909883.944892.74390@k78g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.27.23.51.48.93774@REMOVE.THIS.cybersource.com.au>

On Sat, 27 Jan 2007 06:58:04 -0800, Carl Banks wrote:

>> I find that when I detect invalid parameters overtly, I spend less time
>> debugging.
> 
> If it helps go ahead an use them.  The world won't end if you use an 
> assertion in a less than ideal situation.  And, after all, if someone 
> doesn't like it they can shut them off.


Is there any way to have finer control of assertions than just passing -O
to the Python interpreter? Suppose I want to switch them off for certain
modules but not others, am I out of luck?


-- 
Steven.



From rschroev_nospam_ml at fastmail.fm  Thu Jan 18 12:07:19 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Thu, 18 Jan 2007 17:07:19 GMT
Subject: Would a Dutch speaker please check this wiki page please?
In-Reply-To: <7x8xg0s5h1.fsf@ruckus.brouhaha.com>
References: <mailman.2852.1169070591.32031.python-list@python.org>
	<a9dd0$45aea341$d443bb3a$10472@news.speedlinq.nl>
	<45af8edf$0$336$e4fe514c@news.xs4all.nl>
	<7x8xg0s5h1.fsf@ruckus.brouhaha.com>
Message-ID: <bPNrh.297349$227.5850210@phobos.telenet-ops.be>

Paul Rubin schreef:
> "Martin P. Hellwig" <mhellwig at xs4all.nl> writes:
>> Indeed it's not Afrikaans but just incorrect use of Dutch and not
>> related to python.
> 
> It was apparently posted by someone with a .be address, so I'll guess
> it was written a Belgian French speaker who knows some Dutch.  The
> "me" vs "mijn" error sounds like something a French speaker might have
> done.

To me (as a Belgian Dutch speaker) it sounds more like someone writing 
phonetically (probably because of a low education or low interest in 
writing correctly) and being from the Netherlands (since the 
pronunciation of 'mijn' sounds more like 'me' there then in Flanders).

It's not unlike the use of "I should of" instead of "I should've" or "I 
should have" in English, though much less common. At least I think and 
hope it's much less common, but actually I don't read all that much 
forums, newsgroups etc. in Dutch.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From ggg at zzz.it  Wed Jan 31 13:44:39 2007
From: ggg at zzz.it (deelan)
Date: Wed, 31 Jan 2007 19:44:39 +0100
Subject: subway
In-Reply-To: <mailman.3360.1170266376.32031.python-list@python.org>
References: <5f56302b0701310802y7e45c98fmaaebe090e34d410@mail.gmail.com>	<17856.50898.477998.112022@montanaro.dyndns.org>
	<mailman.3360.1170266376.32031.python-list@python.org>
Message-ID: <fs5wh.17867$K8.14561@news.edisontel.com>

Daniel Nogradi wrote:
(...)
> 
> the egg file can not be downloaded completely, the connection is
> closed at byte 138903 all the time and the file is bigger than that.
> If anyone managed to grab the file please let me know so far I tried
> wget and firefox.

I've checked on my hd and found a recent (Jun 2006) checkout
on the original SVN repos.

There's everything in it: Subway code, web site and examples:

<http://www.deelan.com/dev/subway/subway-svn-20060610.zip>

HTH

-- 
d.


From emin.shopper at gmail.com  Wed Jan 17 14:02:51 2007
From: emin.shopper at gmail.com (Emin)
Date: 17 Jan 2007 11:02:51 -0800
Subject: question about module resolution
In-Reply-To: <eolibj$mf2$02$1@news.t-online.com>
References: <1169050133.438101.90030@a75g2000cwd.googlegroups.com>
	<eolibj$mf2$02$1@news.t-online.com>
Message-ID: <1169060571.641437.297170@51g2000cwl.googlegroups.com>

I put the lines you suggested in baz.py, but got an error:

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import baz
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "baz.py", line 3, in <module>
    from .. import config
ValueError: Attempted relative import in non-package

On Jan 17, 11:20 am, Peter Otten <__pete... at web.de> wrote:
> Emin wrote:
> > I often find myself wanting to have a child module get some parameters
> > defined in a parent module. For example, imagine  I have the following
> > directory structure and want something in baz.py to look at a value in
> > config.py. I end up putting in things like import sys;
> > sys.path.append('../..'). Is there a better way?
>
> > foo/
> >      __init__.py
> >      config.py
> >      bar/
> >           __init__.py
> >           baz.pyfrom __future__ import absolute_import
> from .. import config
> 
> Peter



From carsten at uniqsys.com  Tue Jan  2 11:32:10 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 02 Jan 2007 11:32:10 -0500
Subject: How do I add users using Python scripts on a Linux machine
In-Reply-To: <ene0j1$6nk$03$1@news.t-online.com>
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
	<ene0j1$6nk$03$1@news.t-online.com>
Message-ID: <1167755530.3387.16.camel@dot.uniqsys.com>

On Tue, 2007-01-02 at 17:17 +0100, Sebastian 'lunar' Wiesner wrote:
> Ravi Teja <webraviteja at gmail.com> typed
> 
> > 
> > Ivan Voras wrote:
> >> Ramdas wrote:
> >> > Well,
> >> >
> >> > I need to add users from a web interface for a web server, which
> >> > runs only Python. I need to add users, set quotas and in future
> >> > even look at managing ip tables to limit bandwidth.
> >> >
> >> > I know os.system(), but this has to be done through a form entry
> >> > through a web interface.
> >> >
> >> > Anyways thanks, do advise if there more pythonic solutions
> >>
> >> What you're looking for is actually a pretty complex thing. You
> >> *could* in theory manage /etc/passwd (and its "shadow" file) - you
> >> can find crypto primitives like MD5 and DES on the 'net, but note
> >> that you must run your script under the 'root' account in order to
> >> write (and even read!) the passwd database. The same goes for using
> >> os.system and the built-in OS utility. Be aware of security
> >> implications if you're running your web server under the root
> >> account.
> > 
> > How about invoking scripts with SUID root set?
> 
> Linux seems to ignore SUID bit on scripts:

I don't think that that has anything to do with Linux or not. The script
is not the actual executable, hence its suid bit is irrelevant. You'd
have to set the suid bit on the python executable, but that would affect
all python scripts, which is probably bad.

-Carsten




From inq1ltd at verizon.net  Mon Jan 15 18:05:19 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Mon, 15 Jan 2007 18:05:19 -0500
Subject: download win32file
In-Reply-To: <_mTqh.49191$kn7.39312@newsfe23.lga>
References: <mailman.2742.1168900097.32031.python-list@python.org>
	<_mTqh.49191$kn7.39312@newsfe23.lga>
Message-ID: <200701151805.19483.inq1ltd@verizon.net>

On Monday 15 January 2007 10:37, hg wrote:
> jim-on-linux wrote:
> > Where can I download win32file / win32ui?
> >
> > The links below are broken.  Mark Hammond
> > should be made aware of this.
> >
> >
> > URL below has two links that send you no
> > place
> > http://mail.python.org/pipermail/python-list/
> >2002-October/167638.html
> >
> >
> > Links:
> > http://starship.python.net/crew/mhammond/win3
> >2/Downloads.html
> >
> > http://starship.python.net/crew/mhammond/down
> >loads/win32all-148.exe
> >
> >
> > Produce;
> >
> >  The requested URL was not found on this
> > server. The link on the referring page seems
> > to be wrong or outdated. Please inform the
> > author of that page about the error.
> >
> > jim-on-linux
>
> Do you mean PyWin32 ?

?? Do I have to download pywin32 to get win32ui, 
or win32file, or win32api

>
> http://sourceforge.net/projects/pywin32/


From rubbishemail at web.de  Thu Jan 18 06:16:56 2007
From: rubbishemail at web.de (rubbishemail at web.de)
Date: 18 Jan 2007 03:16:56 -0800
Subject: arguments of a function/metaclass
In-Reply-To: <eoiu53$h8$1@ulysses.news.tiscali.de>
References: <1168960230.524841.280900@m58g2000cwm.googlegroups.com>
	<eoiu53$h8$1@ulysses.news.tiscali.de>
Message-ID: <1169119016.289813.92050@38g2000cwa.googlegroups.com>


thank you!



From pavlovevidence at gmail.com  Sat Jan 27 22:29:06 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 27 Jan 2007 19:29:06 -0800
Subject: assertions to validate function parameters
In-Reply-To: <pan.2007.01.27.23.51.48.93774@REMOVE.THIS.cybersource.com.au>
References: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
	<1169909883.944892.74390@k78g2000cwa.googlegroups.com>
	<pan.2007.01.27.23.51.48.93774@REMOVE.THIS.cybersource.com.au>
Message-ID: <1169954946.479629.312100@k78g2000cwa.googlegroups.com>



On Jan 27, 6:51 pm, Steven D'Aprano 
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> On Sat, 27 Jan 2007 06:58:04 -0800, Carl Banks wrote:
> >> I find that when I detect invalid parameters overtly, I spend less time
> >> debugging.
>
> > If it helps go ahead an use them.  The world won't end if you use an
> > assertion in a less than ideal situation.  And, after all, if someone
> > doesn't like it they can shut them off.
>
> Is there any way to have finer control of assertions than just passing -O
> to the Python interpreter? Suppose I want to switch them off for certain
> modules but not others, am I out of luck?

Please relax.  The suggestion that one could shut them off was tongue 
in cheek.


Carl Banks



From aliptah at gmail.com  Sat Jan  6 17:26:57 2007
From: aliptah at gmail.com (aliptah at gmail.com)
Date: 6 Jan 2007 14:26:57 -0800
Subject: WoC - A web of code
Message-ID: <1168122417.024182.5350@i15g2000cwa.googlegroups.com>

                Web Of Code

        http://idiki.dyne.org/wiki/WoC

WoC stands for Web Of Code.

The basic idea is to add hyperlink capacities to source code documents,
creating, in this way, a new Web, of code.

The Idiki article describes the idea and shows how it can be
implemented using
existing tools, f.e. ViewVC, cscope and Vim.

Another idea explored by the article is:

       #!/usr/bin/python
       from :openssl.org/ssl: import RSA*

The article is here: http://idiki.dyne.org/wiki/WoC

Best regards.



From grahn+nntp at snipabacken.dyndns.org  Thu Jan 11 06:53:42 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 11 Jan 2007 11:53:42 GMT
Subject: Execute binary code
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<1168288176.054142.232780@s80g2000cwa.googlegroups.com>
	<slrneq6vga.tcj.grahn+nntp@frailea.sa.invalid>
	<1168355051.339026.211830@v33g2000cwv.googlegroups.com>
	<mailman.2486.1168358531.32031.python-list@python.org>
	<1168445561.239053.140340@77g2000hsv.googlegroups.com>
	<mailman.2541.1168446713.32031.python-list@python.org>
Message-ID: <slrneqc6vm.tcj.grahn+nntp@frailea.sa.invalid>

On Wed, 10 Jan 2007 10:31:50 -0600, Chris Mellon <arkanes at gmail.com> wrote:
> On 10 Jan 2007 08:12:41 -0800, sturlamolden <sturlamolden at yahoo.no> wrote:
>>
>> Chris Mellon wrote:
>>
>> > This works fine if the binary data is "pure" asm, but the impresssion
>> > the OP gave is that it's a compiled binary, which you can't just "jump
>> > into" this way.
>>
>> You may have to offset the function pointer so the entry point becomes
>> correct.
>>
>
> That won't be enough. You basically would have to re-implement the OS
> loading process, handling relocations and loading any linked
> libraries. Possible, in theory, but very non-trivial.

Yeah, that was implicitly my thinking a bit up in the thread. If all you
have is an executable file (COFF/ELF/...) as a string, and you have no
os.exec(string) or similar, then you're in trouble.

At least if it has to work.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From __peter__ at web.de  Wed Jan  3 07:14:49 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 03 Jan 2007 13:14:49 +0100
Subject: Using codecs.EncodedFile() with Python 2.5
References: <1167824708.700486.249020@h40g2000cwb.googlegroups.com>
Message-ID: <eng6kq$ko3$03$1@news.t-online.com>

David Hughes wrote:

> I used this function successfully with Python 2.4 to alter the encoding
> of a set of database records from latin-1 to utf-8, but the same
> program raises an exception using Python 2.5. This small example shows
> the problem:
> 
> import codecs
> fo = open('test.dat', 'w')
> fo.write('G\xe2teaux')
> fo.close()
> 
> fi = open("test.dat",'r')
> fx = codecs.EncodedFile(fi, 'utf-8', 'latin-1')
> astring = fx.readline()
> print astring
> ustring = unicode(astring, 'utf-8' )
> print repr(ustring)
> print ustring.encode('latin-1')
> print ustring.encode('utf-8')
> 
> Python 2.4 gives:
> 
> G??teaux
> u'G\xe2teaux'
> G?teaux
> G??teaux
> 
> which I believe is correct, while 2.5 produces
> 
> Traceback (most recent call last):
>   File "test_codec.py", line 8, in <module>
>     astring = fx.readline()
>   File "C:\Python25\lib\codecs.py", line 709, in readline
>     data = self.reader.readline()
>   File "C:\Python25\lib\codecs.py", line 471, in readline
>     data = self.read(readsize, firstline=True)
>   File "C:\Python25\lib\codecs.py", line 418, in read
>     newchars, decodedbytes = self.decode(data, self.errors)
> UnicodeDecodeError: 'utf8' codec can't decode bytes in position 1-3:
> invalid data
> 
> Is there a genuine problem here, or have I been misusing this function?

This is indeed a bug in Python 2.5. Fixed in subversion.

http://svn.python.org/view/python/trunk/Lib/codecs.py?rev=52517&view=log

Peter



From gagsl-py at yahoo.com.ar  Mon Jan 22 16:12:13 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 22 Jan 2007 18:12:13 -0300
Subject: Best way to document Python code...
In-Reply-To: <ep37ov$vvf$1@sunce.iskon.hr>
References: <1169492869.101706.253620@38g2000cwa.googlegroups.com>
	<tj9th.13185$pQ3.6593@newsread4.news.pas.earthlink.net>
	<ep37ov$vvf$1@sunce.iskon.hr>
Message-ID: <7.0.1.0.0.20070122180625.0598d188@yahoo.com.ar>

At Monday 22/1/2007 17:48, Boris Ozegovic wrote:

>Does Python has API just like in Java, for example
>http://java.sun.com/j2se/1.5.0/docs/api/allclasses-noframe.html ctrl-f and
>than click on class you are searching for, and finally you get clean list
>of all fields and methods.  Where can I find similar in Python, for
>example, if I would like to see which methods list/dictionary has.

Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
py> help(dict)
Help on class dict in module __builtin__:

class dict(object)
  |  dict() -> new empty dictionary.
  |  dict(mapping) -> new dictionary initialized from a mapping object's
  |      (key, value) pairs.
  |  dict(seq) -> new dictionary initialized as if via:
  |      d = {}
  |      for k, v in seq:
  |          d[k] = v
  |  dict(**kwargs) -> new dictionary initialized with the name=value pairs
  |      in the keyword argument list.  For example:  dict(one=1, two=2)
  |
  |  Methods defined here:
  |
  |  __cmp__(...)
  |      x.__cmp__(y) <==> cmp(x,y)
  |
  |  __contains__(...)

You should skip at first magic __methods__. You can use help() with 
any object, or language keyword: help("if")

py> import math
py> help(math)
Help on built-in module math:

NAME
     math

FILE
     (built-in)

DESCRIPTION
     This module is always available.  It provides access to the
     mathematical functions defined by the C standard.

FUNCTIONS
     acos(...)
         acos(x)

         Return the arc cosine (measured in radians) of x.
[...]


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From noone at nowhere.com  Tue Jan 30 00:11:32 2007
From: noone at nowhere.com (avidfan)
Date: Mon, 29 Jan 2007 23:11:32 -0600
Subject: log parser design question
References: <raaor29enqdo2d8n98ma5l8hsdv828v6jf@4ax.com>
	<1170048047.660118.164850@l53g2000cwa.googlegroups.com>
Message-ID: <j9ktr21uhgnqjoknfcu2vot7l354s5l8fd@4ax.com>

On 28 Jan 2007 21:20:47 -0800, "Paul McGuire" <ptmcg at austin.rr.com>
wrote:

>On Jan 27, 10:43 pm, avidfan <n... at nowhere.com> wrote:
>> I need to parse a log file using python and I need some advice/wisdom
>> on the best way to go about it:
>>
>> The log file entries will consist of something like this:
>>
>> ID=8688 IID=98889998 execute begin - 01.21.2007 status enabled
>>         locked working.lock
>>         status running
>>         status complete
>>
>> ID=9009 IID=87234785 execute wait - 01.21.2007 status wait
>>         waiting to lock
>>         status wait
>>         waiting on ID=8688
>>
>> and so on...
>>
>For the parsing of this data, here is a pyparsing approach.  Once 
>parse, the pyparsing ParseResults data structures can be massaged into 
>a queryable list.  See the examples at the end for accessing the 
>individual parsed fields.
>
>-- Paul
>
>data = """
>ID=8688 IID=98889998 execute begin - 01.21.2007 status enabled
>        locked working.lock
>        status running
>        status complete
>
>
>ID=9009 IID=87234785 execute wait - 01.21.2007 status wait
>        waiting to lock
>        status wait
>        waiting on ID=8688
>
>"""
>from pyparsing import *
>
>integer=Word(nums)
>idref = "ID=" + integer.setResultsName("id")
>iidref = "IID=" + integer.setResultsName("iid")
>date = Regex(r"\d\d\.\d\d\.\d{4}")
>
>logLabel = Group("execute" + oneOf("begin wait"))
>logStatus = Group("status" + oneOf("enabled wait"))
>lockQual = Group("locked" + Word(alphanums+"."))
>waitingOnQual = Group("waiting on" + idref)
>statusQual = Group("status" + oneOf("running complete wait"))
>waitingToLockQual = Group(Literal("waiting to lock"))
>statusQualifier = statusQual | waitingOnQual | waitingToLockQual | 
>lockQual
>logEntry = idref + iidref + logLabel.setResultsName("logtype") + "-" \
>    + date + logStatus.setResultsName("status") \
>    + ZeroOrMore(statusQualifier).setResultsName("quals")
>
>for tokens in logEntry.searchString(data):
>    print tokens
>    print tokens.dump()
>    print tokens.id
>    print tokens.iid
>    print tokens.status
>    print tokens.quals
>    print
>
>prints:
>
>['ID=', '8688', 'IID=', '98889998', ['execute', 'begin'], '-', 
>'01.21.2007', ['status', 'enabled'], ['locked', 'working.lock'], 
>['status', 'running'], ['status', 'complete']]
>['ID=', '8688', 'IID=', '98889998', ['execute', 'begin'], '-', 
>'01.21.2007', ['status', 'enabled'], ['locked', 'working.lock'], 
>['status', 'running'], ['status', 'complete']]
>- id: 8688
>- iid: 98889998
>- logtype: ['execute', 'begin']
>- quals: [['locked', 'working.lock'], ['status', 'running'], 
>['status', 'complete']]
>- status: ['status', 'enabled']
>8688
>98889998
>['status', 'enabled']
>[['locked', 'working.lock'], ['status', 'running'], ['status', 
>'complete']]
>
>['ID=', '9009', 'IID=', '87234785', ['execute', 'wait'], '-', 
>'01.21.2007', ['status', 'wait'], ['waiting to lock'], ['status', 
>'wait'], ['waiting on', 'ID=', '8688']]
>['ID=', '9009', 'IID=', '87234785', ['execute', 'wait'], '-', 
>'01.21.2007', ['status', 'wait'], ['waiting to lock'], ['status', 
>'wait'], ['waiting on', 'ID=', '8688']]
>- id: 9009
>- iid: 87234785
>- logtype: ['execute', 'wait']
>- quals: [['waiting to lock'], ['status', 'wait'], ['waiting on', 
>'ID=', '8688']]
>- status: ['status', 'wait']
>9009
>87234785
>['status', 'wait']
>[['waiting to lock'], ['status', 'wait'], ['waiting on', 'ID=', 
>'8688']]

Paul,

Thanks!  That's a great module.  I've been going through the docs and
it seems to do exactly what I need...

I appreciate your help!



From nmm1 at cus.cam.ac.uk  Mon Jan 15 16:23:15 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 15 Jan 2007 21:23:15 GMT
Subject: Maths error
References: <mailman.2480.1168350033.32031.python-list@python.org>
	<eoabbl$270$1@gemini.csx.cam.ac.uk>
	<mailman.2709.1168753952.32031.python-list@python.org>
	<eoffvh$cfv$1@gemini.csx.cam.ac.uk>
	<1168894093.278546.209850@m58g2000cwm.googlegroups.com>
Message-ID: <eogrc3$dl4$1@gemini.csx.cam.ac.uk>


In article <1168894093.278546.209850 at m58g2000cwm.googlegroups.com>,
"Rhamphoryncus" <rhamph at gmail.com> writes:
|> 
|> I've been experimenting with a fixed-point interval type in python.  I
|> expect many algorithms would require you to explicitly
|> round/collapse/whatever-term the interval as they go along, essentially
|> making it behave like a float.

Yes, quite.

|> Do you think it'd suitable for
|> general-use, assuming you didn't mind the explicit rounding?

I doubt it.  Sorry.

|> Unfortunately I lack a math background, so it's unlikely to progress
|> past an experiment.

As the same is true for what plenty of people have done, despite them
having good backgrounds in mathematics, don't feel inferior!


Regards,
Nick Maclaren.


From paddy3118 at netscape.net  Tue Jan  9 01:12:25 2007
From: paddy3118 at netscape.net (Paddy)
Date: 8 Jan 2007 22:12:25 -0800
Subject: Colons, indentation and reformatting.
Message-ID: <1168323145.393149.299540@v33g2000cwv.googlegroups.com>

i was just perusing a Wikipedia entry on the "off side rule" at
http://en.wikipedia.org/wiki/Off-side_rule .
It says that the colon in Python is purely for readability, and cites
our FAQ entry
http://www.python.org/doc/faq/general.html#why-are-colons-required-for-the-if-while-def-class-statements
 .
However, near the top of the Alternatives section, it states that for C
type, curly braces using languages:
  "An advantage of this is that program code can be automatically
reformatted and neatly indented without fear of the block structure
changing".

Thinking about it a little, it seems that a colon followed by
non-indented code that has just been pasted in could also be used by a
Python-aware editor as a flag to re-indent the pasted code.

Tell me it is not so, or I will be editing the Wikipedia page I think.
And if it is true then do we need to update the FAQ?

- Paddy.



From hardcoded.software at gmail.com  Thu Jan 11 19:22:03 2007
From: hardcoded.software at gmail.com (Virgil Dupras)
Date: 11 Jan 2007 16:22:03 -0800
Subject: Matching Directory Names and Grouping Them
References: <1168554244.459131.190440@k58g2000hse.googlegroups.com>
	<mailman.2605.1168555761.32031.python-list@python.org>
	<1168558702.851290.230100@i56g2000hsf.googlegroups.com>
Message-ID: <1168561323.817430.34950@11g2000cwr.googlegroups.com>

>From your example, if you want to group every path that has the same
last 9 characters, a simple solution could be something like:

groups = {}
for path in paths:
    group = groups.setdefault(path[-9:],[])
    group.append(path)

I didn't actually test it, there ight be syntax errors.

J wrote:
> Steve-
>
> Thanks for the reply. I think what I'm trying to say by similar is
> pattern matching. Essentially, walking through a directory tree
> starting at a specified root folder, and returning a list of all
> folders that matches a pattern, in this case, a folder name containing
> a four digit number representing year and a subdirectory name
> containing a two digit number representing a month. The matches are
> grouped together and written into a text file. I hope this helps.
>
> Kind Regards,
> J
>
> Steve Holden wrote:
> > J wrote:
> > > Hello Group-
> > >
> > > I have limited programming experience, but I'm looking for a generic
> > > way to search through a root directory for subdirectories with similar
> > > names, organize and group them by matching their subdirectory path, and
> > > then output their full paths into a text file. For example, the
> > > contents of the output text file may look like this:
> > >
> > > <root>\Input1\2001\01\
> > > <root>\Input2\2001\01\
> > > <root>\Input3\2001\01\
> > >
> > > <root>\Input1\2002\03\
> > > <root>\Input2\2002\03\
> > > <root>\Input3\2002\03\
> > >
> > > <root>\Input2\2005\05\
> > > <root>\Input3\2005\05\
> > >
> > > <root>\Input1\2005\12\
> > > <root>\Input3\2005\12\
> > >
> > > I tried working with python regular expressions, but so far haven't
> > > found code that can do the trick. Any help would be greatly
> > > appreciated. Thanks!
> > >
> > Define "similar".
> >
> > regards
> >   Steve
> > --
> > Steve Holden       +44 150 684 7255  +1 800 494 3119
> > Holden Web LLC/Ltd          http://www.holdenweb.com
> > Skype: holdenweb     http://del.icio.us/steve.holden
> > Blog of Note:          http://holdenweb.blogspot.com



From steveo at syslang.net  Fri Jan 12 18:39:16 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Fri, 12 Jan 2007 18:39:16 -0500 (EST)
Subject: Is it possible to get whole commandline include redirection.., etc
In-Reply-To: <1168643505.949920.154470@a75g2000cwd.googlegroups.com>
References: <1168643505.949920.154470@a75g2000cwd.googlegroups.com>
Message-ID: <Pine.LNX.4.64.0701121831390.24798@saturn.syslang.net>

On Friday, Jan 12th 2007 at 15:11 -0800, quoth postindex at gmail.com:

=>Can I get whole commandline not only argument list.
=>
=>1. When I command like this
=>    $ a.py > filename
=>2. sys.argv is returns only argument list
=>    ['a.py']
=>
=>Is there a way to find out 'redirection' information.

As a new person to python, I'm going to go out on a limb and declare this 
to not be a python question and to be a Unix question. If you're running 
under Windoze then my answer may not be valid since, as you can see, I 
only recently learned how to spell it.

When any Unix commandline is handed to a shell, all pipes and redirections 
are processed by that shell so that the various IO channels for the 
command are defined to point to the desired files before the command is 
even started. Only after that setup has occured is the desired command 
even started. There are books on the subject and this is not the correct 
forum to explain it all, but the docs to read that will leave you with no 
hint of idiomatic usage are all in section 2: fork, exec, open, close, dup 
and pipe (plus a few others not germain here also).

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 27 00:39:17 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 27 Jan 2007 16:39:17 +1100
Subject: instancemethod
References: <ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a@mail.gmail.com>
	<ep110v$t04$1@sea.gmane.org>
	<ef60af090701211712u4d5a520q84c8e86c898bc649@mail.gmail.com>
	<mailman.2973.1169431114.32031.python-list@python.org>
	<1169872049.261689.263820@j27g2000cwj.googlegroups.com>
Message-ID: <pan.2007.01.27.05.39.16.304099@REMOVE.THIS.cybersource.com.au>

On Fri, 26 Jan 2007 20:27:29 -0800, Michele Simionato wrote:

> On Jan 22, 2:58 am, "Gert Cuykens" <gert.cuyk... at gmail.com> wrote:
> 
>> http://www.faqts.com/knowledge_base/view.phtml/aid/16824
> 
> There is a factual mistake on that reference. The last sentence
> 
>> One final note: the single most common use for classmethod is probably
>> in overriding __new__(). It is always needed when overriding __new__()
>> because __new__() is a classmethod.
> 
> is wrong, since __new__ is a staticmethod, NOT a classmethod.

There's a contradiction in the Python docs. 

>From http://docs.python.org/lib/built-in-funcs.html we see:

"A class method receives the class as implicit first argument, just like
an instance method receives the instance."

and 

"A static method does not receive an implicit first argument."


But from http://docs.python.org/ref/customization.html we read:

"__new__(cls[, ...])
    Called to create a new instance of class cls. __new__() is a static
    method (special-cased so you need not declare it as such) that takes
    the class of which an instance was requested as its first argument.
    The remaining arguments are those passed to the object constructor
    expression (the call to the class)."

It seems that the description of __new__ is wrong. Since __new__ takes an
implicit first argument, the class, it is a class method, not a static
method.



-- 
Steven.



From fumanchu at amor.org  Wed Jan 24 17:57:06 2007
From: fumanchu at amor.org (Robert Brewer)
Date: Wed, 24 Jan 2007 14:57:06 -0800
Subject: ANN: Dejavu 1.5.0RC1
Message-ID: <435DF58A933BA74397B42CDEB8145A8608C50C4F@ex9.hostedexchange.local>

The Dejavu Object-Relational Mapper (version 1.5.0RC1) is now available 
and in the public domain. Get it at http://projects.amor.org/dejavu,
or from PyPI: http://www.python.org/pypi/Dejavu/1.5.0RC1.

Dejavu is an Object-Relational Mapper for Python applications. It is
designed to provide the "Model" third of an MVC application. Dejavu
avoids making decisions in the framework which are better left to
developers, and avoids forcing developers to make decisions which are
better left to deployers. In particular, deployers are allowed to mix
and match storage mechanisms, including how and when to cache objects in
memory, making it easier for deployers to tune applications to their
particular environment.

Dejavu provides:

Modeling Layer
1. A base Unit class for persisting objects to storage.
2. A base UnitProperty class for persistent object attributes.
3. ID Sequencers.
4. Associations between Unit classes.
5. Unit Engines, Rules, and Collections.
6. Aggregation and analysis tools.

Application Layer
1. Expressions: pure Python lambda querying. This is perhaps the most
   appealing feature of Dejavu.
2. Sandboxes, which serve as Identity Maps, transaction boundaries,
   and per-connection caches.
3. An Arena class for application-level data.

Storage Layer
1. A base StorageManager class and specification. Unlike many ORMs,
   Dejavu does not require you to have complete control of the back end.
2. Specific StorageManagers for:
   a. Microsoft SQL Server/MSDE
   b. Microsoft Access (Jet)
   c. PostgreSQL
   d. MySQL
   e. SQLite
   f. Shelve
   g. Firebird
   h. RAM
   i. Filesystem


What's New in 1.5:
http://projects.amor.org/dejavu/wiki/WhatsNewIn15

 * Native ID sequencing.
 * Distributed transactions and tested isolation levels.
 * Complete database introspection and auto discovery.

 * New Firebird support.
 * New RAM Storage Manager.
 * New psycopg2 support.
 * New support for using the sqlite3 module built into Python 2.5.
 * Support for typed and typeless SQLite.
 * Support for SQLite :memory: databases.

 * Complete numeric precision and scale support.
 * Native date function support.
 * Complete M x N type-adaptation.
 * Bulletproof encoding support.
 * New 'range' function which returns the closed interval [min(attr),
..., max(attr)].
 * New 'sum' function which returns the sum of all non-None values for
the given cls.attr.
 * Multiple and custom Associations.
 * Improved performance (especially ADO).
 * New JSON encoder/decoder.
 * Short config names for Storage Managers.
 * ADO: New support for the CURRENCY datatype.
 * ADO: Improved string comparisons using Convert and StrComp.

Upgrading to 1.5:
See http://projects.amor.org/dejavu/wiki/UpgradeTo1.5

Documentation for 1.5:
http://projects.amor.org/docs/dejavu/1.5.0RC1/


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org


From duncan.booth at invalid.invalid  Wed Jan 17 04:33:17 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 17 Jan 2007 09:33:17 GMT
Subject: How to determine what exceptions a method might raise?
References: <12qq98ijkn5mld8@corp.supernews.com>
	<mailman.2796.1168985816.32031.python-list@python.org>
	<1169022894.357383.45950@a75g2000cwd.googlegroups.com>
Message-ID: <Xns98BB612D2B06Dduncanbooth@127.0.0.1>

"George Sakkis" <george.sakkis at gmail.com> wrote:

> As for the OP's question, since file is a fixed builtin, I think it
> should be possible to know all the possible exceptions that can be
> raised; I'm not sure if it's clearly documented though.

Just calling 'file' the most obvious exceptions it can raise are:

    	IOError
    	MemoryError
    	ValueError

I'm not sure if it can return UnicodeDecodeError, it looks as though it may 
be possible on windows, but I couldn't trigger it.

Assigning the result to a variable can of course raise absolutely any 
exception. That's the main problem: just because a C function raises only a 
few different exceptions doesn't mean that the line of code calling it 
cannot generate a host more.



From ajdeshpande at gmail.com  Wed Jan 31 12:04:15 2007
From: ajdeshpande at gmail.com (Analog Kid)
Date: Wed, 31 Jan 2007 22:34:15 +0530
Subject: What is the dummy statement that do nothing in Python?
In-Reply-To: <epqhre$qtp$1@netnews.upenn.edu>
References: <epqhre$qtp$1@netnews.upenn.edu>
Message-ID: <4ccf86300701310904s3d6c7aecscc31644cc84dade7@mail.gmail.com>

hey dongsheng:
not too sure what you are looking for ... but i guess a simple "pass"
statement should do it ...

if a > b: pass


hth,
-ajay


On 1/31/07, Dongsheng Ruan <ruan at jcmills.com> wrote:
>
> I remember that in python there is some kind of dummy statement that just
> holds space and does nothing.
>
> I want it to hold the place after a something like if a>b: do nothing
>
> I can't just leave the space blank after if statement because there will
> be
> error message.
>
> Does anybody know what to insert there?
>
> Thanks!
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
BBQ - "Spare (My) Ribs" being contemplated
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070131/4ac46ecc/attachment.html>

From steve at REMOVE.THIS.cybersource.com.au  Thu Jan 25 23:26:09 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 26 Jan 2007 15:26:09 +1100
Subject: assertions to validate function parameters
References: <slrnerho5c.bu4.matt@mwilson.umlcoop.net>
Message-ID: <pan.2007.01.26.04.26.09.242968@REMOVE.THIS.cybersource.com.au>

On Thu, 25 Jan 2007 16:54:05 +0000, Matthew Wilson wrote:

> Lately, I've been writing functions like this:
> 
> def f(a, b):
> 
>     assert a in [1, 2, 3]
>     assert b in [4, 5, 6]
> 
> The point is that I'm checking the type and the values of the
> parameters.

If somebody passes in a == MyNumericClass(2), which would have worked
perfectly fine except for the assert, your code needlessly raises an
exception.

Actually that's a bad example, because surely MyNumericClass(2) would
test equal to int(2) in order to be meaningful. So, arguably, testing that
values fall within an appropriate range is not necessarily a bad idea, but
type-testing is generally bad.

Note also that for real code, a bare assert like that is uselessly
uninformative:

>>> x = 1
>>> assert x == 3
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AssertionError


This is better:

>>> assert x == 3, "x must be equal to three but is %s instead" % x
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AssertionError: x must be equal to three but is 1 instead


This is even better still:

>>> if x != 3:
...     raise ValueError("x must be equal to three but is %s instead" % x)
...
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: x must be equal to three but is 1 instead


And even better still is to move that test out of your code and put it
into unit tests (if possible).


 
> I'm curious how this does or doesn't fit into python's duck-typing
> philosophy.

Doesn't fit, although range testing is probably okay.


> I find that when I detect invalid parameters overtly, I spend less time
> debugging.

Yes, probably. But you end up with less useful code:

def double(x):
    """Return x doubled."""
    assert x == 2.0 and type(x) == float
    return 2*x

Now I only need to test one case, x == 2.0. See how much testing I don't
have to do? *wink*

There's a serious point behind the joke. The less your function does, the
more constrained it is, the less testing you have to do -- but the less
useful it is, and the more work you put onto the users of your function.
Instead of saying something like

a = MyNumericClass(1)
b = MyNumericClass(6)
# more code in here...
# ...
result = f(a, b)


you force them to do this:

a = MyNumericClass(1)
b = MyNumericClass(6)
# more code in here...
# ... 
# type-cast a and b to keep your function happy
result = f(int(a), int(b))
# and type-cast the result to what I want
result = MyNumericClass(result)

And that's assuming that they can even do that sort of type-cast without
losing too much information.


> Are other people doing things like this?  Any related commentary is
> welcome.

Generally speaking, type-checking is often just a way of saying "My
function could work perfectly with any number of possible types, but I
arbitrarily want it to only work with these few, just because."

Depending on what you're trying to do, there are lots of strategies for
avoiding type-tests: e.g. better to use isinstance() rather than type,
because that will accept subclasses. But it doesn't accept classes that
use delegation.

Sometimes you might have a series of operations, and you want the lot to
either succeed or fail up front, and not fail halfway through (say, you're
modifying a list and don't want to make half the changes needed). The
solution to that is to check that your input object has all the methods
you need:

def f(s):
    """Do something with a string-like object."""
    try:
        upper = s.upper
        split = s.split
    except AttributeError:
        raise TypeError('input is not sufficiently string-like')
    return upper()

Good unit tests will catch anything type and range tests will catch, plus
a whole lot of other errors, while type-testing and range-testing will
only catch a small percentage of bugs. So if you're relying on type- and
range-testing, you're probably not doing enough testing.


-- 
Steven.



From garyjefferson123 at yahoo.com  Thu Jan 25 16:22:18 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: 25 Jan 2007 13:22:18 -0800
Subject: logging module and doctest
In-Reply-To: <epa2tb$4lj$00$1@news.t-online.com>
References: <1169703145.393435.166020@m58g2000cwm.googlegroups.com>
	<ep9q9p$1o2$02$1@news.t-online.com>
	<epa2tb$4lj$00$1@news.t-online.com>
Message-ID: <1169760137.955864.178810@a75g2000cwd.googlegroups.com>

Peter Otten wrote:
> Peter Otten wrote:
>
> > Gary Jefferson wrote:
> >
> >> I've written a logging.filter and would like to use doctest on it
> >> (using a StreamHandler for stdout), but this doesn't seem possible.
> >> Output from the logger seems to disappear (running the doctest strings
> >> through the interpreter as-is yields expected results).  I assume this
> >> is because doctest does something with logging.
> >
> > It redirects stdout to a StringIO subclass to capture the output.
> >
> >> Is there any way to make these work together?
> >
> > Using the StreamHandler with something like
> >
> > class WrapStdOut(object):
> >     def __getattr__(self, name):
> >         return getattr(sys.stdout, name)
> >
> > instead of sys.stdout directly should work.
>
> Or create the StreamHandler inside your doctest where sys.stdout is already
> redirected.
>
> Peter

I was creating the StreamHandler inside doctest.  Turns out, however,
that I hadn't imported 'sys', and so it didn't work.  Its a little
strange that this didn't result in an error, but there you have it.

Thanks for the tip that led me to discover this.

Gary



From James.w.Howard at gmail.com  Wed Jan 17 18:05:20 2007
From: James.w.Howard at gmail.com (JamesHoward)
Date: 17 Jan 2007 15:05:20 -0800
Subject: Asyncore select statement problem
Message-ID: <1169075120.491855.103200@q2g2000cwa.googlegroups.com>

I have a problem with python's asyncore module throwing a bad file
descriptor error.  The code might be difficult to copy here, but the
problem is essentially:

The server wants to sever the connection of an open Asyncore socket.
Calling the socket.close() nor the socket.shutdown(2) calls seem to
work.  The only way I can close the connection without creating the
error below is to have the client close the connection.

I have the asyncore.loop() as the last line of a thread that is spawned
within the applications "mainframe.py" or gui thread.  It doesn't seem
to me like this would make a difference, but I am unfamiliar with the
specifics of how the asyncore module works.

Any thoughts people have would be greatly appreciated.  If needed I may
be able to create a small version of the problem to post for people to
see.

Thanks,
Jim Howard


Exception in thread Thread-1:
Traceback (most recent call last):
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/threading.py",
line 460, in __bootstrap
    self.run()
  File
"/Users/jwhoward2/Documents/Projects/LJServer/LJDeviceServer/DeviceServer.py",
line 23, in run
    asyncore.loop()
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/asyncore.py",
line 191, in loop
    poll_fun(timeout, map)
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/asyncore.py",
line 121, in poll
    r, w, e = select.select(r, w, e, timeout)
error: (9, 'Bad file descriptor')



From robert.kern at gmail.com  Tue Jan 23 23:00:52 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 23 Jan 2007 22:00:52 -0600
Subject: easy_install pylons failure - www.myghty.org unavailable
In-Reply-To: <ep6la3$mrh$1@sea.gmane.org>
References: <17846.54389.27457.383902@montanaro.dyndns.org>
	<ep6la3$mrh$1@sea.gmane.org>
Message-ID: <ep6llk$nn1$1@sea.gmane.org>

Robert Kern wrote:
> skip at pobox.com wrote:
> 
>> Is it not able to get past this point because there is only one source for
>> Myghty or does it always need to go to a package's home page?  I was able to
>> work around this by manually downloading the Myghty-1.1.tar.gz file and
>> installing it.
> 
> Asking on Distutils-SIG list will be more likely to get Phillip Eby's attention.
> It surprises me that setuptools didn't pick up the tarball on the CheeseShop.

Now that www.myghty.org is back up, I see that the CheeseShop tarball is picked
up eventually. I believe that easy_install checks all of the various sources to
try to find a best match (for some definition of "best"). Of course, I would
consider it a bug that an exception raised while trying to fetch one possible
source stops the entire process, particularly when a matching tarball has
already been found.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From beej at beej.us  Tue Jan 30 15:44:49 2007
From: beej at beej.us (Beej)
Date: 30 Jan 2007 12:44:49 -0800
Subject: Help me understand this
In-Reply-To: <528hvsF1lrmsgU1@mid.uni-berlin.de>
References: <1170140737.027139.14920@h3g2000cwc.googlegroups.com>
	<pan.2007.01.30.07.47.33.15637@REMOVEME.cybersource.com.au>
	<1170146755.446429.90720@v45g2000cwv.googlegroups.com>
	<528hvsF1lrmsgU1@mid.uni-berlin.de>
Message-ID: <1170189889.846237.157500@a75g2000cwd.googlegroups.com>

On Jan 30, 1:38 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> Because 2. is the start of a float-literal. That isn't distinguishable for
> the parsere otherwise.

Oh, excellent! I wonder why I didn't think of that--I was too busy in 
"get a field" mode it didn't even occur to me that the "." had a 
different context, no matter how much more obvious.

>>> print 2.
2.0
>>> type(2.)
<type 'float'>

-Beej



From altis at semi-retired.com  Tue Jan 30 11:46:09 2007
From: altis at semi-retired.com (Kevin Altis)
Date: Tue, 30 Jan 2007 08:46:09 -0800
Subject: ANNOUNCE: OSCON 2007 Call for Participation Ends Soon
Message-ID: <45bf7567$0$497$815e3792@news.qwest.net>

Be Heard at OSCON 2007 -- Submit Your Proposal to Lead Sessions and
Tutorials by February 5!

The O'Reilly Open Source Convention
July 23-27, 2007
Portland, Oregon
http://conferences.oreillynet.com/os2007/


More than 2500 open source developers, gurus, experts and users will
gather, eager to network, learn, and share the latest knowledge on open
source software. We think of this group as "the best of the best,"
and we
invite you to contribute to the more than 400 sessions and 40 tutorials
designed to build inspiration and know-how. Submit your proposals at:
http://conferences.oreillynet.com/cs/os2007/create/e_sess

Share your favorite techniques, your proven successes, and newly
developed
technology in tracks for Linux, PHP, Perl, Python, Ruby, Java,
Databases,
Desktop Applications, Web Applications (client-side and server-side),
Windows, Administration, Security, and Emerging Topics.

No topic (other than closed source software) is off-limits, so send us
your best ideas. Among the hot topics we want to hear about are:
- Tools for the administration and deployment of large server farms
- Parallelization, grid, and multicore technologies
- Virtualization
- Ajax, Javascript, standards-based design, and other client-side web
issues
- Seaside, Rails, Django, and other interesting server-side technology
- Ubuntu as an emergent usable Linux distro and contender for Red Hat
and
Sun's client and server markets
- Java as open source
- AI, machine learning, and other ways of making software smarter
than the
people using it
- User experience and usability engineering lessons for web and desktop
software
- The spread of open source into law, culture, data, and services,
and the
accompanying issues and lessons

For full details and guidelines on submitting your proposal, go to
http://conferences.oreillynet.com/os2007/. If you know someone who would
be a good speaker, please pass this email on.

Whether as a speaker or as an attendee, you'll want to participate in
this
meeting of the best minds in the business, which will also include the
O'Reilly Radar Executive Briefing. Be sure to save the dates -- July
23-27. Registration will open in early April.

We hope to see you in Portland in July!

The OSCON Team

P.S. Remember, proposals for sessions and tutorials must be submitted to
http://conferences.oreillynet.com/os2007/
by (11:59PM Pacific Standard Time)  Monday, February 5.


*******************************************************
To change your newsletter subscription options, please visit
http://www.oreillynet.com/cs/nl/home.

To unsubscribe from O'Reilly conference announcements, email
conferences-unsubscribe at oreilly.com.

For assistance, email help at oreillynet.com.

O'Reilly Media, Inc.
1005 Gravenstein Highway North, Sebastopol, CA  95472
*******************************************************




From bearophileHUGS at lycos.com  Thu Jan 18 21:15:54 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 18 Jan 2007 18:15:54 -0800
Subject: Match 2 words in a line of file
In-Reply-To: <1169172293.938820.103400@51g2000cwl.googlegroups.com>
References: <1169164007.110870.29650@m58g2000cwm.googlegroups.com>
	<1169166223.073714.109620@51g2000cwl.googlegroups.com>
	<1169172293.938820.103400@51g2000cwl.googlegroups.com>
Message-ID: <1169172954.107365.133950@51g2000cwl.googlegroups.com>

MrJean1 wrote:
> def lines_with_words(file, word1, word2):
>     """Print all lines in file that have both words in it."""
>     for line in file:
>         words = line.split()
>         if word1 in words and word2 in words:
>             print line

This sounds better, it's probably faster than the RE version, Python
2.5 has a really fast str.__contains__ method, done by effbot:

def lines_with_words(file, word1, word2):
    """Print all lines in file that have both words in it.
    (word1 may be the less frequent word of the two)."""
    for line in file:
        if word1 in line and word2 in line:
            print line

Bye,
bearophile



From webraviteja at gmail.com  Mon Jan 22 17:02:41 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 22 Jan 2007 14:02:41 -0800
Subject: How to convert a string into an integer
In-Reply-To: <1169502340.434227.224820@11g2000cwr.googlegroups.com>
References: <1169502340.434227.224820@11g2000cwr.googlegroups.com>
Message-ID: <1169503361.730963.178670@v45g2000cwv.googlegroups.com>


yinglcs at gmail.com wrote:
> Can you please tell me why the following code does not work in python?
> My guess is I need to convert 'count' from a string to an integer. How
> can I do that?
> And my understanding is python is a dynamic type language, should
> python convert it for me automatically?
>
> count = sys.argv[2]
> for i in range(count):
>     #do some stuff
>
> Thank you.

You are confusing dynamic typing with weak typing. Weakly typed
languages (such as BASIC perform) such implicit conversions.

However, Python is dynamically and strongly typed.

With dynamic typing, the type information resides with the actual
object and not with the name referring to it. That simply means that
the type cannot be determined till the object is actually created (i.e
till runtime). But once created, the object does have a type.

So you will need to explicitly convert yourself. In this case with
int_value = int(string_value)

Ravi Teja.



From michael at mustun.ch  Wed Jan  3 19:16:01 2007
From: michael at mustun.ch (Michael)
Date: Thu, 04 Jan 2007 01:16:01 +0100
Subject: code optimization (calc PI)
In-Reply-To: <459BFDCB.4000503@sschwarzer.net>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
	<459BFDCB.4000503@sschwarzer.net>
Message-ID: <UGXmh.194$9v1.250@nntpserver.swip.net>


Yes. But it still runns very slowly.

If someone is really interested in speed optimization, I can publish my 
PI-calc code.

Maybe for some Python compiler/interpreter hackers... ;-)
(There are only 2 while-loops, one within another, and some simple basic 
calculations. Nothing special.)


Stefan Schwarzer wrote:

> On 2007-01-03 16:50, mm wrote:
> 
>>More general, maybe there is a speed optimazation docu out there.
> 
> 
> At least Alex Martellis "Python in a Nutshell" has a section on
> optimization.
> 
> I presented this at the last EuroPython conference:
> http://sschwarzer.com/download/optimization_europython2006.pdf
> 
> Stefan
> 


From Florian.Lindner at xgm.de  Wed Jan 24 15:48:38 2007
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Wed, 24 Jan 2007 21:48:38 +0100
Subject: Static variables
Message-ID: <ep8gkl$g7v$3@news.in.tum.de>

Hello,
does python have static variables? I mean function-local variables that keep
their state between invocations of the function.

Thanks,

Florian


From tubby at bandaheart.com  Thu Jan 25 16:05:11 2007
From: tubby at bandaheart.com (tubby)
Date: Thu, 25 Jan 2007 16:05:11 -0500
Subject: pdf to text
Message-ID: <epb638$gd4$1@solaris.cc.vt.edu>

I know this question comes up a lot, so here goes again. I want to read 
text from a PDF file, run re searches on the text, etc. I do not care 
about layout, fonts, borders, etc. I just want the text. I've been 
reading Adobe's PDF Reference Guide and I'm beginning to develop a 
better understanding of PDF in general, but I need a bit of help... this 
seems like it should be easier than it is. Here's some code:

import zlib

fp = open('test.pdf', 'rb')
bytes = []
while 1:
     byte = fp.read(1)
     #print byte
     bytes.append(byte)
     if not byte:
         break

for byte in bytes:

     op = open('pdf.txt', 'a')

     dco = zlib.decompressobj()

     try:
         s = dco.decompress(byte)
         #print >> op, s
         print s
     except Exception, e:
         print e

     op.close()

fp.close()

I know the text is compressed... that it would have stream and endstream 
makers and BT (Begin Text) and ET (End Text) and that the uncompressed 
text is enclosed in parenthesis (this is my text). Has anyone here done 
this in a simple fashion? I've played with the pyPdf library some, but 
it seems overly complex for my needs (merge PDFs, write PDFs, etc). I 
just want a simple PDF text extractor.

Thanks


From arkanes at gmail.com  Wed Jan 24 12:23:33 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 24 Jan 2007 11:23:33 -0600
Subject: The reliability of python threads
In-Reply-To: <ep841j$anu$1@gemini.csx.cam.ac.uk>
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
Message-ID: <4866bea60701240923l1facdeccnb308cb4a0b67b4ff@mail.gmail.com>

On 24 Jan 2007 17:12:19 GMT, Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
>
> In article <mailman.3092.1169657938.32031.python-list at python.org>,
> "Carl J. Van Arsdall" <cvanarsdall at mvista.com> writes:
> |> Hey everyone, I have a question about python threads.  Before anyone
> |> goes further, this is not a debate about threads vs. processes, just a
> |> question.
> |>
> |> With that, are python threads reliable?  Or rather, are they safe?  I've
> |> had some strange errors in the past, I use threading.lock for my
> |> critical sections, but I wonder if that is really good enough.
> |>
> |> Does anyone have any conclusive evidence that python threads/locks are
> |> safe or unsafe?
>
> Unsafe.  They are built on top of unsafe primitives (POSIX, Microsoft
> etc.)  Python will shield you from some problems, but not all.
>
> There is precious little that you can do, because the root cause is
> that the standards and specifications are hopelessly flawed.
>

This is sufficiently inaccurate that I would call it FUD. Using
threads from Python, as from any other language, requires knowledge of
the tradeoffs and limitations of threading, but claiming that their
usage is *inherently* unsafe isn't true. It is almost certain that
your code and locking are flawed, not that the threads underneath you
are buggy.


From nogradi at gmail.com  Thu Jan 18 13:56:05 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Thu, 18 Jan 2007 19:56:05 +0100
Subject: Traversing the properties of a Class
In-Reply-To: <1169141253.332211.12790@38g2000cwa.googlegroups.com>
References: <1169141253.332211.12790@38g2000cwa.googlegroups.com>
Message-ID: <5f56302b0701181056p67bcf4c5g371fa80a6f3d76da@mail.gmail.com>

> I'm using Python version 2.4 and I created a class with some properties
> like:
>
> def GetCallAmount(self):
>         return somedata
>
> def GetCallCurrency(self):
>     return  somemoredata
>
> more....defs..etc.
>
> CallAmount           = property(GetCallAmount,None,None,None)
> CallCurrency         = property(GetCallCurrency, None, None, None)
>
> more....properies..etc.
>
> For debugging purposes, I would like to traverse the class listing out
> all the properties.


for attr in dir( yourclass ):
    if repr( yourclass.__dict__[ attr ] ).startswith( '<property' ):
        print 'This looks like a property although can be something
else too: ' + attr

:)


From kent at kentsjohnson.com  Mon Jan 29 13:13:57 2007
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 29 Jan 2007 18:13:57 GMT
Subject: Can I undecorate a function?
In-Reply-To: <mailman.3271.1170091661.32031.python-list@python.org>
References: <slrnersb0v.mua.matt@mwilson.umlcoop.net>
	<mailman.3271.1170091661.32031.python-list@python.org>
Message-ID: <45BE3966.70704@kentsjohnson.com>

skip at pobox.com wrote:
>     Matt> In some instances I want to access just the function f, though,
>     Matt> and catch the values before they've been decorated.
> 
> def f(x):
>     return x * x
> 
> @as_string
> def fs(x):
>     return f(x)

or just
fs = as_string(f)

Kent

> 
> Call the one you want.
> 
> Skip


From john.pye at gmail.com  Thu Jan 25 00:24:29 2007
From: john.pye at gmail.com (John Pye)
Date: 24 Jan 2007 21:24:29 -0800
Subject: Catching floating point errors from linked C code
In-Reply-To: <PzWth.22651$yC5.11156@newssvr27.news.prodigy.net>
References: <1169696243.262973.188540@s48g2000cws.googlegroups.com>
	<PzWth.22651$yC5.11156@newssvr27.news.prodigy.net>
Message-ID: <1169702669.027065.65990@v33g2000cwv.googlegroups.com>

Hi John,

On Jan 25, 3:43 pm, John Nagle <n... at animats.com> wrote:
> Python is probably running with floating point exceptions disabled,
> but you can enable them in your C code, and restoring the floating
> point mode when you leave, if you want.  This is probably
> only worth doing under a debugger, because otherwise you just end
> up with an aborted instance of Python.

So as far as you know, Python doesn't switch stuff like
feenableexcept(FE_EXCEPT_ALL)? Does Python use the <signal.h>
internally, or are all its FPEs detected by explicit checks beforehand?

If writing a python module with SWIG, and the module uses Python
callbacks, do I need to restore the signal handlers before running the
callback, or python do that itself?

(These might be questions better asked on the SWIG list I guess)

Cheers
JP



From deets at nospam.web.de  Fri Jan 26 08:03:41 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 26 Jan 2007 14:03:41 +0100
Subject: Mounting shares with python
References: <1169815227.574577.176610@m58g2000cwm.googlegroups.com>
Message-ID: <51uchdF1lnrdqU1@mid.uni-berlin.de>

Marcpp wrote:

> Hi, when i mount a share with python...
> 
> os.system ("mount -t smbfs -o username=nobody ...")
> 
> the problem is that I'll to be root.
> Have a comand to send a root password...?
> I've tried
> 
> os.system ("su")
> os.system ("the password")
> 
> but it doesn't works.

You can try to use sudo

os.system ("sudo mount -t smbfs -o username=nobody ...")

It must be configured properly of course.

Diez


From uymqlp502 at sneakemail.com  Mon Jan 22 02:41:32 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: 21 Jan 2007 23:41:32 -0800
Subject: Is any python like linux shell?
In-Reply-To: <1169398326.510530.180860@51g2000cwl.googlegroups.com>
References: <1169398326.510530.180860@51g2000cwl.googlegroups.com>
Message-ID: <1169451692.443462.99220@q2g2000cwa.googlegroups.com>

Frank Potter wrote:
> I learned some python in windows.
> And now I've turned to linux.
> I read a book and it teaches how to write shell script with bash,
> but I don't feel like the grammar of bash.
> Since I know about python,
> I want to get a linux shell which use python grammar.
> I searched by google and I found pysh, which is not maintained any
> more.
> There's another script named pyshell, which is not likely what I'm
> searching for.
> So, will somebody please tell me if there are any python like shells
> for linux?

You could in principle use Python as a general-purpose interactive
shell, but it wouldn't make much sense. Bash is more convenient for
basic operations such as changing directories, listing directories,
copying files, etc.

For more advanced scripting, I use both bash and Python. I use bash
typically as an executive for scripting Python programs. For example, I
use bash for stepping through a list of directories and running a set
of python programs in each directory. Sure, I could use Python for the
whole thing, but simply starting programs and moving files around is
more straightforward in bash than in Python.



From deets at nospam.web.de  Fri Jan 19 05:12:37 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 19 Jan 2007 11:12:37 +0100
Subject: Why this script can work?
References: <mailman.2891.1169189508.32031.python-list@python.org>
Message-ID: <51bjskF1jbnhrU1@mid.uni-berlin.de>

Jm lists wrote:

> Please help with this script:
> 
> class ShortInputException(Exception):
>         '''A user-defined exception class.'''
>         def __init__(self,length,atleast):
>                 Exception.__init__(self)
>                 self.length=length
>                 self.atleast=atleast
> 
> try:
>         s=raw_input('Enter something --> ')
>         if len(s)<3:
>                 raise ShortInputException(len(s),3)
>         # Other work can continue as usual here
> except EOFError:
>         print '\nWhy did you do an EOF on me?'
> except ShortInputException,x:
>         print 'ShortInputException: The input was of length %d, was
> expecting at least %d' %(x.length,x.atleast)
> else:
>         print 'No exception was raised.'
> 
> 
> My questions are:
> 
> 1) ShortInputException,x:   what's the 'x'? where is it coming?

except <ExceptionSpec>, <variable>:

will catch an exception of the kind specified in <ExceptionSpec> (it might
actually be more than one), and store the exception object in the variable
named <variable>

> 2) The 'if' and 'else' are not in the same indent scope,why this can work?


Because additionally to if, also for and try have else-clauses. The latter
two are only being called if the body of the control structure hasn't been
left due to "unnatural" circumstances. See this:




for i in xrange(10):
    pass
else:
    print "test 1"

for i in xrange(10):
    break
else:
    print "test 2"

try:
    pass
except:
    pass
else:
    print "test 3"

try:
    raise "I know I shouldn't rais strings..."
except:
    pass
else:
    print "test 4"



It will only print 

test 1
test 3


Diez


From hotfigs at gmail.com  Thu Jan 11 16:52:47 2007
From: hotfigs at gmail.com (Geoff)
Date: 11 Jan 2007 13:52:47 -0800
Subject: Best FCGI handler
Message-ID: <1168552367.745450.84800@p59g2000hsd.googlegroups.com>

Hi!

Does anyone have any recommendations for FGCI interfaces for python?
For example jonpy?

Thanks,

Geoff



From kay.schluehr at gmx.net  Wed Jan 24 17:39:59 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 24 Jan 2007 14:39:59 -0800
Subject: Python does not play well with others
In-Reply-To: <1169660807.369400.120220@h3g2000cwc.googlegroups.com>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169660807.369400.120220@h3g2000cwc.googlegroups.com>
Message-ID: <1169678399.502252.123450@j27g2000cwj.googlegroups.com>

On 25 Jan., 04:46, "Paul Boddie" <p... at boddie.org.uk> wrote:

> >   That's because, in those worlds, either the
> > development team for the language or the development team
> > for the subsystem takes responsibility for making them work.
> > Only Python doesn't do that.And this is where I'd almost reach agreement with you. It's not enough
> for the language to keep growing new features if the libraries are
> broken or appear archaic, and this task seems to be outside the "core
> developers" area of interest.

But it shouldn't be - although this is not a request for the core
developers to maintain any 3rd party package in the world, of course. A
while ago someone on python-dev suggested to use builtbot to monitor
were 3rd party packages get broken by new Python releases and offered
this as a service to library developers. I do think this and similar
ideas are relevant to improve overall quality, not only that of the
CPython interpreter. I would also suggest stricter policies for PyPI
were unmaintained packages might be removed after a period ( or at
least tagged in a certain way ).

But maybe admitting quality problems of free software that is affecting
the whole community ( and not just isolated projects ) is just too much
negative PR on a "competitive language market"? We all know Ruby makes
us happy and Haskell is driven by real academics, who are doing
software engineering right, by default. Maybe Python could survive only
leaving the impression that it binds to everything and has an ever
growing code base of high quality?



From gagsl-py at yahoo.com.ar  Sun Jan  7 15:03:32 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 12:03:32 -0800
Subject: strange for loop construct
In-Reply-To: <mailman.2396.1168198592.32031.python-list@python.org>
References: <1168029548.217679.251230@q40g2000cwq.googlegroups.com>
	<mailman.2347.1168030198.32031.python-list@python.org>
	<12ptf5bl21f2teb@corp.supernews.com>
	<1168193206.598957.257700@38g2000cwa.googlegroups.com>
	<mailman.2396.1168198592.32031.python-list@python.org>
Message-ID: <1168200211.928423.319260@38g2000cwa.googlegroups.com>

On 7 ene, 16:34, s... at pobox.com wrote:

>     Gabriel> Where do you find the "What's new" for previous releases? I
>     Gabriel> have to read them online.
>
> Google for
> >     what's new site:python.org

That's what I do. But this post:

> If you have a Python installation you should be able to find the
> "Whats New" section of the docs.  List comprehensions are described
> pretty well in the "What's new in Python 2.0?" section.

suggested that one could find that info inside the Python installation,
and I was asking *where*, because I can't find it, and I suspect it
actually isn't there.

-- 
Gabriel Genellina



From mail at microcorp.co.za  Tue Jan  9 03:22:32 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 9 Jan 2007 10:22:32 +0200
Subject: code formatter?
References: <entknh$8onl$1@zam602.zam.kfa-juelich.de>
Message-ID: <021b01c733c8$415c6b00$03000080@hendrik>

"siggi" <smusnmrNOSPAM at yahoo.com> wrote:

> Is there a simple code formatter that first removes all indentations and
> then refomats correctly?

tabnanny ?

- Hendrik





From sturlamolden at yahoo.no  Wed Jan 10 11:12:41 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 10 Jan 2007 08:12:41 -0800
Subject: Execute binary code
In-Reply-To: <mailman.2486.1168358531.32031.python-list@python.org>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<1168288176.054142.232780@s80g2000cwa.googlegroups.com>
	<slrneq6vga.tcj.grahn+nntp@frailea.sa.invalid>
	<1168355051.339026.211830@v33g2000cwv.googlegroups.com>
	<mailman.2486.1168358531.32031.python-list@python.org>
Message-ID: <1168445561.239053.140340@77g2000hsv.googlegroups.com>


Chris Mellon wrote:

> This works fine if the binary data is "pure" asm, but the impresssion
> the OP gave is that it's a compiled binary, which you can't just "jump
> into" this way.

You may have to offset the function pointer so the entry point becomes
correct.



From jstroud at mbi.ucla.edu  Fri Jan 12 16:49:00 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 12 Jan 2007 13:49:00 -0800
Subject: Regex Question
In-Reply-To: <mailman.2540.1168446078.32031.python-list@python.org>
References: <mailman.2540.1168446078.32031.python-list@python.org>
Message-ID: <eo8vod$emn$1@zinnia.noc.ucla.edu>

Bill Mill wrote:
> Hello all,
> 
> I've got a test script:
> 
> ==== start python code =====
> 
> tests2 = ["item1: alpha; item2: beta. item3 - gamma--",
> "item1: alpha; item3 - gamma--"]
> 
> def test_re(regex):
>    r = re.compile(regex, re.MULTILINE)
>    for test in tests2:
>        res = r.search(test)
>        if res:
>            print res.groups()
>        else:
>            print "Failed"
> 
> ==== end python code ====
> 
> And a simple question:
> 
> Why does the first regex that follows successfully grab "beta", while
> the second one doesn't?
> 
> In [131]: test_re(r"(?:item2: (.*?)\.)")
> ('beta',)
> Failed
> 
> In [132]: test_re(r"(?:item2: (.*?)\.)?")
> (None,)
> (None,)
> 
> Shouldn't the '?' greedily grab the group match?
> 
> Thanks
> Bill Mill
> bill.mill at gmail.com

The question-mark matches at zero or one. The first match will be a 
group with nothing in it, which satisfies the zero condition. Perhaps 
you mean "+"?

e.g.

py> import re
py> rgx = re.compile('1?')
py> rgx.search('a1').groups()
(None,)
py> rgx = re.compile('(1)+')
py> rgx.search('a1').groups()

James


From gandalf at designaproduct.biz  Fri Jan 12 10:24:38 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Fri, 12 Jan 2007 16:24:38 +0100
Subject: context managers and generators
In-Reply-To: <1168614604.273032.173650@51g2000cwl.googlegroups.com>
References: <1168611420.448058.163860@11g2000cwr.googlegroups.com>	<mailman.2646.1168613499.32031.python-list@python.org>
	<1168614604.273032.173650@51g2000cwl.googlegroups.com>
Message-ID: <45A7A836.2020907@designaproduct.biz>


> I'm still thinking there is a better way to do it, and would appreciate
> any ideas.
>   
Everything can be implemented with goto and arrays.

http://entrian.com/goto/

:-P






From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 20 05:45:32 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 20 Jan 2007 21:45:32 +1100
Subject: Does eval has the same features as Perl's?
References: <mailman.2937.1169285428.32031.python-list@python.org>
Message-ID: <pan.2007.01.20.10.45.31.333567@REMOVE.THIS.cybersource.com.au>

On Sat, 20 Jan 2007 17:30:24 +0800, Jm lists wrote:

> Hello members,
> 
> I want to know does the "eval" in python have the same features as in
> Perl (capture errors)?
> 
> For example,in perl I can wrote:
> 
> $re = eval { 1 / 0 };
> 
> Though 1/0 is a fatal error but since it's in "eval" block so the perl
> interpreter doesn't get exit.

How hard would it be to actually try it?

>>> eval("1/0")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 1, in <module>
ZeroDivisionError: integer division or modulo by zero

It took about three seconds to actually test it.

eval has many security risks -- as a rule, you should never pass strings
you've got from the user to eval, unless you want the user to p0wn your
computer. It is harder than you might think to make eval safe -- you
should seriously consider it an advanced tool, not a basic tool. As a
newbie, you should work under the following rule:

"If I think I need to use eval, I'm probably wrong."

I've been using Python for seven or eight years, and I don't think I've
ever used eval in serious code.

Now, suppose you find yourself wanting to use eval. You've considered the
above rule carefully, and decided that it doesn't apply in this case.
You've been careful to use it only on safe strings, not arbitrary strings
from users. How do you use eval so it captures errors?

try:
    eval("1/0")
except ZeroDivisionError: # capture only one error
    pass


or something like this:

try:
    eval("something or other goes here")
except Exception: # capture any error
    pass



-- 
Steven.



From wojciech_mula at poczta.null.onet.pl.invalid  Sun Jan 28 16:13:28 2007
From: wojciech_mula at poczta.null.onet.pl.invalid (Wojciech =?ISO-8859-2?Q?Mu=B3a?=)
Date: Sun, 28 Jan 2007 21:13:28 +0000 (UTC)
Subject: Trouble with max() and __cmp__()
References: <1170017167.165222.325800@a34g2000cwb.googlegroups.com>
Message-ID: <slrnerq4ek.56n.wojciech_mula@cat.tac>

Thomas Nelson wrote:
> My code:
>
> class Policy(list):
>     def __cmp__(self,other):
>         return cmp(self.fitness,other.fitness)

Define method __gt__.


From fsck_spam at telenet.be  Wed Jan 17 14:05:18 2007
From: fsck_spam at telenet.be (Rikishi 42)
Date: Wed, 17 Jan 2007 20:05:18 +0100
Subject: Making a simple script standalone
References: <5d1084-5j7.ln1@whisper.very.softly>
	<mailman.2820.1169032834.32031.python-list@python.org>
Message-ID: <ek8284-od9.ln1@whisper.very.softly>

On Wednesday 17 January 2007 03:33, Gabriel Genellina wrote:

> At Tuesday 16/1/2007 19:49, Rikishi 42 wrote:
> 
>>What I want to do is to compile/bundle/prepare/whatever_term a simple
>>Python script for deployment on a Windows machine. Installing Python
>>itself on that machine, is not an option. Ideally I would like to obtain
>>a single executable file, but a script+runtime is acceptable.
> 
> distutils + py2exe

Tried that, just after asking here.
A bit messy (poor docs) and a very bloated result.


Thanks for the answer, anyway.


-- 
Research is what I'm doing, when I don't know what I'm doing.
(von Braun)



From zaz600 at gmail.com  Wed Jan 24 23:25:43 2007
From: zaz600 at gmail.com (NoName)
Date: 24 Jan 2007 20:25:43 -0800
Subject: How can i do this in Python?
Message-ID: <1169699143.237710.277160@l53g2000cwa.googlegroups.com>

perl -ane "print join(qq(\t), at F[0,1,20,21,2,10,12,14,11,4,5,6]).qq(\n)"
file.txt

-a autosplit mode with -n or -p (splits $_ into @F)
-n assume "while (<>) { ... }" loop around program



From gagsl-py at yahoo.com.ar  Sun Jan  7 12:43:00 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: 7 Jan 2007 09:43:00 -0800
Subject: still struggling, howto use a list-element as a name ? Sory,
	hit send button to early
In-Reply-To: <bcf0b$45a0291e$d443bb3a$4323@news.speedlinq.nl>
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
	<45a01981$0$296$426a74cc@news.free.fr>
	<I_Unh.390$_B1.309@read3.inet.fi>
	<441e$45a02246$d443bb3a$24795@news.speedlinq.nl>
	<bcf0b$45a0291e$d443bb3a$4323@news.speedlinq.nl>
Message-ID: <1168191780.620228.67440@42g2000cwt.googlegroups.com>

Stef Mientki ha escrito:

> class LED (device):
>   pinlist ={
>   # pin    name         type     init-value   other-parameters
>       1: ('Cathode',   _DIG_IN,   [],           _par2),
>       2: ('Anode',     _DIG_OUT,  [],           _par33)
>       }
>
>   Status = {True:('On'), False:('Off')}
>
>   def execute (self):
>     old = self.On
>     self.On = (~self.Cathode.Value & self.Anode.Value) > 0
>     if self.On <> old : print self.Name, self.Status[self.On]

I don't know of what type are those values (certainly the're not []
because ~[] won't work). But note that using ~ with apparently logical
values doesn't work as expected. The operators &,|,^,~ are meant to be
used on integers, and work bit by bit. The operators and, or, xor, not
operate on logical, or boolean, values.

py> value = True
py> negvalue = ~value
py> if negvalue: print "oops!"
...
oops!
py> bool(negvalue)
True

If you want to express the condition "The led is ON when the value of
Anode is > 0 and the value of Cathode is < 0" that would be
self.On = self.Anode.Value>0 and self.Cathode.Value<0

but since I don't know the types of values involved I'm not sure if
this expression is right.

-- 
Gabriel Genellina



From duncan.booth at invalid.invalid  Tue Jan 23 16:00:21 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 Jan 2007 21:00:21 GMT
Subject: free variables /cell objects question
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com>
	<Xns98C17C03B6297duncanbooth@127.0.0.1>
	<1169563580.634000.122540@v45g2000cwv.googlegroups.com>
Message-ID: <Xns98C1D5A2A1EC4duncanbooth@127.0.0.1>

"gangesmaster" <tomerfiliba at gmail.com> wrote:

> ugliness :)
> 
> so this is why [lambda: i for i in range(10)] will always return 9.
> imho that's a bug, not a feature.

Horses for courses.

There are cases where you need to get the latest value of the bound 
variable, and there are cases where you want the value at the time it was 
bound. For the latter case you have always been able to use default 
arguments.


From Thomas.Ploch at gmx.net  Sun Jan  7 17:33:11 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sun, 07 Jan 2007 23:33:11 +0100
Subject: how to find the longst element list of lists
In-Reply-To: <%keoh.230$L06.209@nntpserver.swip.net>
References: <Vwdoh.223$L06.180@nntpserver.swip.net>	<45a169f0$0$309$426a34cc@news.free.fr>
	<%keoh.230$L06.209@nntpserver.swip.net>
Message-ID: <45A17527.3070206@gmx.net>

Michael M. schrieb:
>> Err... this makes three distinct lists, not a list of lists.
>>
> 
> Sure. Logically spoken. Not in Python code. Or a number of lists.
> Sure not [[ bla... ] [bla.]] etc.

???????

Thomas


From gmenhennitt at optusnet.com.au  Tue Jan  9 17:29:06 2007
From: gmenhennitt at optusnet.com.au (Graham Menhennitt)
Date: Wed, 10 Jan 2007 09:29:06 +1100
Subject: injecting functions into a python sandbox within a python program
Message-ID: <45a4172e$0$71751$c30e37c6@ken-reader.news.telstra.net>

I have a large Python 2.5 program that I want my users to be able to 
"extend" using a Python script. However, I want their script to run in a 
sandbox within the overall program so that they only have access to the 
rest of the program via a single simple interface. Note that this is not 
meant to be a real anti-hacker type security sandbox - just "help them 
to avoid shooting themselves in the foot" type security.

So I created a single object that has the interface that I want them to 
access. I call their script via "exec" passing the single interface 
object in the "globals" parameter to exec. It (conceptually) looks like 
this:

i = Interface()
glob = { 'i': i }
exec script in glob

Then they can call i.whatever() from within their script. This all works 
fine.

Now, what I want to do is provide some "helper" functions for them to 
use in the script. These functions still only access the rest of the 
program via 'i'. They just wrap some of the interface functions to make 
life easier for the user. My current solution is to prepend these 
functions onto the start of the script. I.e.

helperFuncs = """
def f1(): i.whatever()
"""

exec helperFuncs + "\n" + script.read() in glob

This works but doesn't seem very elegant.

I've tried defining the helper funcions in my caller and passing them 
through the globals i.e.

def f1(): i.whatever()
glob = { 'i': i, 'f1': f1 }
exec script in glob

The problem here is that the functions don't have access to the global 
variable 'i'. I need to use that object instance since it has other 
functionality that is required to interface to the rest of the program.

I'm sure that this is simple to get around for a Python expert (which I 
am not!). Does anybody have any ideas? Any alternate approach?

Thanks in advance for any assistance,
	Graham


From tjreedy at udel.edu  Tue Jan 23 12:28:55 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 23 Jan 2007 12:28:55 -0500
Subject: best package for a physical simulation?
References: <mailman.9299.1169555288.32030.python-list@python.org>
	<60915.195.220.102.78.1169558458.squirrel@mailgate.phys.ens.fr>
Message-ID: <ep5gkn$gml$1@sea.gmane.org>


<sittner at lkb.ens.fr> wrote in message 
news:60915.195.220.102.78.1169558458.squirrel at mailgate.phys.ens.fr...
| Hello everyone,
| i would like to use python to perform some simulation involving 
collisions
| of colloidal particles.
| which is the best package/engine to do that in python?
| thanks,

I would start with numpy/scipy and perhaps look at Scientific Python.

tjr





From rds1226 at sh163.net  Tue Jan 16 15:07:16 2007
From: rds1226 at sh163.net (Dongsheng Ruan)
Date: Tue, 16 Jan 2007 15:07:16 -0500
Subject: How can I create a linked list in Python?
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
Message-ID: <eojb9v$92rq$1@netnews.upenn.edu>

Thanks for your kindly help.
I am new CS student taking datat structure and algorithms with AHO's book 
with the same title.

The book is done in Pascal, which might be an outdated language.

However, my instructor probably wants us to understand the list ADT better 
by not using the built in list in Python.





"Gary Herron" <gherron at islandtraining.com> wrote in message 
news:mailman.2791.1168975031.32031.python-list at python.org...
> Dongsheng Ruan wrote:
>> with a cell class like this:
>>
>> #!/usr/bin/python
>>
>> import sys
>>
>> class Cell:
>>
>>  def __init__( self, data, next=None ):
>>   self.data = data
>>   self.next = next
>>
>>  def __str__( self ):
>>   return str( self.data )
>>
>>  def echo( self ):
>>   print self.__str__()
> If you really want a list (as Python defines a list - with all the 
> methods) then you should use Python's lists.  They are quite efficient and 
> convenient:
>
> l = [Cell(1), Cell(2), Cell(3)]
>
> However, if what you want is each cell to refer to a next cell (which 
> after all is what a linked list does), then you already have it with the 
> next attribute.  (In other languages you might implement 'next' as a 
> pointer, while in Python we call it a reference -- but it amounts to the 
> same thing.)  Create it this way:
>
> c = Cell(3)
> b = Cell(2, c) a = Cell(1, b)
>
> or
>
> a = Cell(1, Cell(2, Cell(3)))
>
> However, I'll repeat this:  The concept of a linked list if a figment of 
> languages with pointer data types.  Python abstracts that by allowing 
> attributes to contain references to other objects.  However, you're much 
> better off if you can use Python's list data structure rather than try to 
> emulate an outdated concept in a modern language.
>
> Gary Herron
>
>
> 




From horpner at yahoo.com  Wed Jan 24 09:23:06 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 24 Jan 2007 14:23:06 GMT
Subject: Thoughts on using isinstance
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
Message-ID: <eZJth.1693$G23.448@newsreading01.news.tds.net>

On 2007-01-24, abcd <codecraig at gmail.com> wrote:
> In my code I am debating whether or not to validate the types of data
> being passed to my functions.  For example
>
> def sayHello(self, name):
>     if not name:
>         rasie "name can't be null"
>     if not isinstance(name, str):
>         raise "name must be a string"
>     print "Hello " + name
>
> Is the use of isinstance a "bad" way of doing things?  is it a
> "heavy" operation?  for example, if I use this in each function
> validate input will it slow things down a lot?
>
> just curious how you might handle this type of situation (other
> than not validating at all).

Validation of parameters is an excellent idea, but *not*
validation of datatypes. The problem is that sayHello can
function properly with many more objects than just strings, if
you write it differently. The following version accepts any
iterable over strings.

def sayHello(self, name):
  it = iter(name)
  print "Hello", ''.join(it)

It still lacks validation. But to validate a name you will need
to conceive a set of regular strings that contains every name
you'd like to accept. Names probably aren't worth validating,
although you might reasonably reject a few things, like the empty
string.

-- 
Neil Cerutti


From gagsl-py at yahoo.com.ar  Thu Jan 11 19:34:52 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 21:34:52 -0300
Subject: Fixed keys() mapping
In-Reply-To: <1168535970.585977.317760@p59g2000hsd.googlegroups.com>
References: <1168535970.585977.317760@p59g2000hsd.googlegroups.com>
Message-ID: <7.0.1.0.0.20070111211744.0592cfd8@yahoo.com.ar>

At Thursday 11/1/2007 14:19, George Sakkis wrote:

>The implementation I came up with goes like this: each fkdict instance
>stores only the values as a list in self._values. The keys and the
>mapping of keys to indices are stored in a dynamically generated
>subclass of fkdict, so that self._keys and self._key2index are also
>accessible from the instance. The dynamically generated subclasses are
>cached so that the second time an fkdict with the same keys is created,
>the cached class is called.
>
>Since the keys are determined in fkdict.__init__(), this scheme
>requires changing self.__class__ to the dynamically generated subclass.
>As much as I appreciate Python's dynamic nature, I am not particularly
>comfortable with objects that change their class and the implications
>this may have in the future (e.g. how well does this play with
>inheritance). Is this a valid use case for type-changing behavior or is
>there a better, more "mainstream" OO design pattern for this ? I can
>post the relevant code if necessary.

I think a better place would be __new__ instead. This is where you 
can determine the right class to use and construct the new instance.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From tiedon_jano at hotmail.com  Tue Jan 16 10:34:10 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Tue, 16 Jan 2007 15:34:10 GMT
Subject: Regular expressions question
In-Reply-To: <1168947810.175793.228620@51g2000cwl.googlegroups.com>
References: <1168947810.175793.228620@51g2000cwl.googlegroups.com>
Message-ID: <Sf6rh.151$%i7.43@read3.inet.fi>

Victor Polukcht kirjoitti:
> I have 2 strings:
> 
> "Global               etsi3   *200 ok            30   100% 100%
> Outgoing"
> and
> "Global               etsi3   *   4 ok             30   100% 100%
> Outgoing"
> 
> The difference is "*200" instead of "*  4". Is there ability to write a
> regular expression that will match both of that strings?
> 

If the goal is not to study regular expressions, here's a solution 
without them. Not so short, but working.

lst = [
     "Global               etsi3   *200 ok            30   100% 100% 
Outgoing",
     "Global               etsi3   *   4 ok             30   100% 100% 
Outgoing"]

for e in lst:
     es = e.split()
     if len(es) == 9:
         num_val = es[3]
     else:
         num_val = es[2][1:]
     print es[0], num_val, es[-3], es[-2]


Cheers,
Jussi


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Jan 11 16:29:38 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 11 Jan 2007 22:29:38 +0100
Subject: Learning Python book, new edition?
References: <mailman.2587.1168537482.32031.python-list@python.org>
Message-ID: <50noi2F1gnearU1@mid.individual.net>

Demel, Jeff wrote:
> Bj?rn replied:

>>IIRC, differences to 2.4 are in it, too.
 
> Interesting.  The description I read said 2.3.  That's good to
> know.

Whoops, I think it was Python Cookbook that has also remarks about
2.4. Learning Python is only about 2.3 as it seems.

Regards,


Bj?rn

-- 
BOFH excuse #342:

HTTPD Error 4004 : very old Intel cpu - insufficient processing
power



From duncan.booth at invalid.invalid  Tue Jan 16 06:59:35 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 Jan 2007 11:59:35 GMT
Subject: Regular expressions question
References: <1168947810.175793.228620@51g2000cwl.googlegroups.com>
Message-ID: <Xns98BA7A00DDBC0duncanbooth@127.0.0.1>

"Victor Polukcht" <vpolukcht at gmail.com> wrote:

> I have 2 strings:
> 
> "Global               etsi3   *200 ok            30   100% 100%
> Outgoing"
> and
> "Global               etsi3   *   4 ok             30   100% 100%
> Outgoing"
> 
> The difference is "*200" instead of "*  4". Is there ability to write a
> regular expression that will match both of that strings?
> 
Yes, ".*" would match both of the strings, but not in a useful way. You'll 
have to consider which strings you *don't* want to match as well as which 
ones you do and whether you want to extract any information from the 
strings or find the ones which match.

But first take a step back and look at the problem as a whole. You didn't 
say what you are trying to do, and often people will jump at regular 
expressions as the solution when there may be better ways of doing what 
they want without writing a regular expression.

What do you really want to do?


From jmike at alum.mit.edu  Fri Jan 12 09:49:22 2007
From: jmike at alum.mit.edu (jmike at alum.mit.edu)
Date: 12 Jan 2007 06:49:22 -0800
Subject: Command line arguments on Vista
Message-ID: <1168613362.406648.304720@11g2000cwr.googlegroups.com>

So I write this sript called printargs.py:

------
#!/usr/local/bin/python
import sys
print 'there are %d args' % len(sys.argv)
for arg in sys.argv:
    print 'arg: %s' % arg
------

and make it executable.  On pretty much every platform I can get my
hands on, when I run

     printargs.py booga -a wooga

I get this output:

     there are 4 args
     arg: printargs.py
     arg: booga
     arg: -a
arg: wooga

But on Windows Vista, when I run that command, I get

     there are 1 args
     arg: printargs.py

What's up with that?
   --JMike



From Thomas.Ploch at gmx.net  Thu Jan  4 22:40:34 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Fri, 05 Jan 2007 04:40:34 +0100
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
Message-ID: <459DC8B2.60908@gmx.net>

jeremito schrieb:
> I am writing a class that is intended to be subclassed.  What is the
> proper way to indicate that a sub class must override a method?
> 
> Thanks,
> Jeremy
> 

What do you mean by 'indicate'? Writing it to the docstring of the
class/method? Writing a comment?

class Foo:
	"""
	When inheriting from Foo, method foo must be 	
	overridden. Otherwise SPAM.
	"""
	def foo(self):
		print 'bar'

class Bar(Foo):
	def __init__(self):
		Foo.__init__(self)
	
	# Has to be defined to override the base class's method
	# when inheriting from class Foo. Otherwise: SPAM
	def foo(self):
		print 'foo'

I don't know any other way.

Thomas


From michele.simionato at gmail.com  Tue Jan  9 07:31:43 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 9 Jan 2007 04:31:43 -0800
Subject: General Question About Python
In-Reply-To: <1168254451.098796.144790@42g2000cwt.googlegroups.com>
References: <1168254451.098796.144790@42g2000cwt.googlegroups.com>
Message-ID: <1168345903.305552.205330@42g2000cwt.googlegroups.com>


Enteng wrote:
> To those who program in python, what programs do you do?
> Also what community projects are you involved in(OSS probably)?
> Will mastering the language land me a job?

Well, I few years ago I decided to learn Python to get a job and it
worked. Of course,
you should think of something to get yourself visibile  (i.e.
contribute to some OSS
project, write articles, partecipate to conferences, etc.)

   Michele Simionato



From gagsl-py at yahoo.com.ar  Tue Jan  9 20:47:06 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 09 Jan 2007 22:47:06 -0300
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5 (Final report)
In-Reply-To: <2BBAEE949D384D40A2B851287ADB6A4304595A6E@eugsrv400.psc.psc
	net.com>
References: <2BBAEE949D384D40A2B851287ADB6A4304595A6E@eugsrv400.psc.pscnet.com>
Message-ID: <7.0.1.0.0.20070109222253.0395f220@yahoo.com.ar>

At Tuesday 9/1/2007 22:03, Carroll, Barry wrote:

>The first assumption was correct: the file object is destroyed.  The 
>second assumption is apparently incorrect: the file handle is not 
>released when the associated object is destroyed.  These 'orphaned' 
>file handles build up and when the OS handle limit is reached, "too 
>many open files" errors show up.

I've tried with 2.3.4 something like this:

   flist = []
   for i in range(5000):
     fn = 'test%04.4d.tmp' % i
     print fn
     f = open(fn,'w')
     flist.append(f)
     # f.close()

Without the last close(), I get an error on iteration 509 like you; 
adding the close(), I can create the 5000 file instances without 
problems. So it seems that Python *does* release the file handle.

> > On Python 2.5 you can use the new `with` statement.
> >
>
>Not only that, the file errors don't appear when we run our 
>program/table combination under 2.5.  I can't explain the 
>difference, unless the work done to implement the 'with' statement 
>has an impact outside the scope of that feature.  In any event, it 
>does us no good.  Other constraints on the test system require us to 
>stick with Python 2.3, at least for the present.

My advise would be (as others have already suggested) to not *assume* 
anything and put a print statement when you think you close the file. 
Perhaps that code fragment is never executed! Or perhaps there is 
*another* place where you open a file and never close it (a logfile 
perhaps? it doesnt have to be a different file each time). Someone 
already suggested to use Filemon to trace the file operations; you 
can also use Process Explorer to inspect the open file handles (both 
tools available from SysInternals).


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From horpner at yahoo.com  Tue Jan 23 11:28:48 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 23 Jan 2007 16:28:48 GMT
Subject: Best way to document Python code...
References: <1169492869.101706.253620@38g2000cwa.googlegroups.com>
	<tj9th.13185$pQ3.6593@newsread4.news.pas.earthlink.net>
	<ep37ov$vvf$1@sunce.iskon.hr>
	<1169500149.885333.170320@s34g2000cwa.googlegroups.com>
Message-ID: <slrnerch7j.r4.horpner@FIAD06.norwich.edu>

On 2007-01-22, bearophileHUGS at lycos.com <bearophileHUGS at lycos.com> wrote:
> Boris Ozegovic:
>> Does Python has API just like in Java, for example
>> http://java.sun.com/j2se/1.5.0/docs/api/allclasses-noframe.html ctrl-f and
>> than click on class you are searching for, and finally you get clean list
>> of all fields and methods.  Where can I find similar in Python, for
>> example, if I would like to see which methods list/dictionary has.
>
> You can do that from the shell, with help(name) or dir(name),
> where name can be a class, object, most things.

It is OK for a lark, but sadly dir is not suitable enough. You do
need to refer to the documentation off-line or you'll miss vital
entries. It won't hurt to read effbot.org, either, as I keep
finding out.

Also check out the interactive help system. If you've got the
html versions of the docs installed, it functions somewhat like
perldoc. Type help() at the interactive prompt to get started.

-- 
Neil Cerutti
Will the last person to leave please see that the perpetual light is
extinguished --sign at New England church

-- 
Posted via a free Usenet account from http://www.teranews.com



From paul at boddie.org.uk  Sun Jan 14 13:20:47 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 14 Jan 2007 10:20:47 -0800
Subject: Threaded for loop
References: <1168719342.627408.98870@a75g2000cwd.googlegroups.com>
	<7xr6ty8ugv.fsf@ruckus.brouhaha.com>
	<1168750177.856791.85730@s34g2000cwa.googlegroups.com>
	<mailman.2716.1168786760.32031.python-list@python.org>
Message-ID: <1168798847.405344.126410@51g2000cwl.googlegroups.com>

skip at pobox.com wrote:
>
> There is a module in development (processing.py) that provides an API like
> the threading module but that uses processes under the covers:
>
>     http://mail.python.org/pipermail/python-dev/2006-October/069297.html
>
> You might find that an interesting alternative.

See the promised parallel processing overview on the python.org Wiki
for a selection of different solutions:

http://wiki.python.org/moin/ParallelProcessing

Paul



From steve at holdenweb.com  Thu Jan 11 18:13:02 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 11 Jan 2007 23:13:02 +0000
Subject: globals accros modules
In-Reply-To: <3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>
References: <opudnW4oMIZtJTjYnZ2dnUVZ_h2pnZ2d@comcast.com>	<mailman.2556.1168492539.32031.python-list@python.org>
	<3ad32$45a64fc7$83aef404$32138@news1.tudelft.nl>
Message-ID: <eo6g9v$j24$1@sea.gmane.org>

stef wrote:
>> Change a=1 to amodule.a=1
>> If you find yourself doing tricks with the module globals, think about 
>> redesigning your application.
>>
> Of course I completely agree with you.
> 
> But ...
> if you're moving from MatLab to Python,
> and want to show your collegaes,
> with how little effort they can reuse all their existing MatLab routines 
> in Python,
> then the global issue is a real pain !!
> 
> You can explain your collegaes, that
> - the startindex of arrays changes from 1 to 0
> - slices are upto, instead of including the final border
> - indention is th? key
> And tell them about all beautiful things in Python,
> but tell them that they are going to loose all their globals ???
> 
Yup. If they don't tell us how to write programs we won't tell them how 
to cure illness. Sounds like a deal to me ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From basti.wiesner at gmx.net  Tue Jan  2 13:14:45 2007
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Tue, 02 Jan 2007 19:14:45 +0100
Subject: How do I add users using Python scripts on a Linux machine
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
	<ene0j1$6nk$03$1@news.t-online.com>
	<mailman.2210.1167755536.32031.python-list@python.org>
Message-ID: <ene7el$l51$03$1@news.t-online.com>

Carsten Haese <carsten at uniqsys.com> typed

> On Tue, 2007-01-02 at 17:17 +0100, Sebastian 'lunar' Wiesner wrote:
>> Ravi Teja <webraviteja at gmail.com> typed
>> 
>> > 
>> > Ivan Voras wrote:
>> >> Ramdas wrote:
>> >> > Well,
>> >> >
>> >> > I need to add users from a web interface for a web server, which
>> >> > runs only Python. I need to add users, set quotas and in future
>> >> > even look at managing ip tables to limit bandwidth.
>> >> >
>> >> > I know os.system(), but this has to be done through a form entry
>> >> > through a web interface.
>> >> >
>> >> > Anyways thanks, do advise if there more pythonic solutions
>> >>
>> >> What you're looking for is actually a pretty complex thing. You
>> >> *could* in theory manage /etc/passwd (and its "shadow" file) - you
>> >> can find crypto primitives like MD5 and DES on the 'net, but note
>> >> that you must run your script under the 'root' account in order to
>> >> write (and even read!) the passwd database. The same goes for
>> >> using os.system and the built-in OS utility. Be aware of security
>> >> implications if you're running your web server under the root
>> >> account.
>> > 
>> > How about invoking scripts with SUID root set?
>> 
>> Linux seems to ignore SUID bit on scripts:
> 
> I don't think that that has anything to do with Linux or not. The
> script is not the actual executable, hence its suid bit is irrelevant.

I don't think so. From what I know, the script is passed as executable
to the kernel loader, which interprets the shebang and feeds the script
through the correct interpreter. So the kernel loader sees the script
itself as executable instead of the interpreter binary. I've heard of
other Unix systems, which handle this differently (meaning that the
SUID bit on scripts has an effect), but I may be wrong.

> You'd have to set the suid bit on the python executable, but that
> would affect all python scripts, which is probably bad.

It _is_ bad!

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From joeyslistings at yahoo.com  Sun Jan  7 11:54:57 2007
From: joeyslistings at yahoo.com (joeyslistings at yahoo.com)
Date: 7 Jan 2007 08:54:57 -0800
Subject: I want to learn
In-Reply-To: <mailman.2386.1168178452.32031.python-list@python.org>
References: <1168174097.252001.71130@s80g2000cwa.googlegroups.com>
	<mailman.2386.1168178452.32031.python-list@python.org>
Message-ID: <1168188897.811575.278490@51g2000cwl.googlegroups.com>

Thanks for the links guys!! Dive into Python is great and I am
subscribing to tutor as well.


Thomas Ploch wrote:
> joeyslistings at yahoo.com schrieb:
> > Hi,
> >
> > I have been "programming" in the .net environment and ide for a few
> > years and I am looking to make the switch over to python. I have
> > absolutely no python experience whatsoever. I am looking for a python
> > guru who has instant messenger or gtalk or whatever who can meet me
> > online in the mornings, give me some direction for the day and then
> > answer some questions here and there online throughout the day.
>
>
> So you are looking for a person (no, a guru), that stays by your side
> the whole day, gives you answers and helps you learning python.
>
> This is a ridiculous request.
>
> If you want to learn python, you should start with visiting
> http://www.diveintopython.org/ and read it. If you have previous
> programming experience, this is the place to start.
>
> > Sorry to interrupt the group but since all python gurus appear to be
> > happily at work on the next level apps at google nobody responded to
> > my craigslist ads.
>
> You can always ask your questions here on the list, there are enough
> people that are willing to help.
> 
> Thomas



From nmm1 at cus.cam.ac.uk  Tue Jan 16 17:01:02 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 16 Jan 2007 22:01:02 GMT
Subject: Class data members in C
Message-ID: <eojhuu$72c$1@gemini.csx.cam.ac.uk>


Hmm.  The extensions documentation describes how to add instance
members to a class (PyMemberDef), but I want to add a class member.
Yes, this is constant for all instances of the class.

Any pointers?


Regards,
Nick Maclaren.


From gert.cuykens at gmail.com  Sun Jan 21 20:12:01 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Mon, 22 Jan 2007 02:12:01 +0100
Subject: instancemethod
In-Reply-To: <ep110v$t04$1@sea.gmane.org>
References: <ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a@mail.gmail.com>
	<ep110v$t04$1@sea.gmane.org>
Message-ID: <ef60af090701211712u4d5a520q84c8e86c898bc649@mail.gmail.com>

On 1/22/07, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> "Gert Cuykens" <gert.cuykens at gmail.com> escribi? en el mensaje
> news:ef60af090701211416n5b2eb7edt2ee6d4555bd49c1a at mail.gmail.com...
>
> > class Db:
> >
> >    _db=-1
> >    _cursor=-1
> >
> >    @classmethod
> >    def __init__(self,server,user,password,database):
> >        self._db=MySQLdb.connect(server , user , password , database)
> >        self._cursor=self._db.cursor()
> >
> >    @classmethod
> >    def excecute(self,cmd):
> >        self._cursor.execute(cmd)
> >        self._db.commit()
> >
> >
> > if __name__ == '__main__':
> >    gert=Db('localhost','root','******','gert')
> >    gert.excecute('select * from person')
> >    for x in range(0,gert.rowcount):
> >        print gert.fetchone()
> >    gert.close()
>
> Besides your specific question that was already answered, why are you using
> classmethods at all?
> You are constructing a Db instance and using it as if all were normal
> instance methods... Just remove all those @classmethod declarations and use
> it in a standard way.
>
> --
> Gabriel Genellina
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

i thought @classmethod was the normal method ?

From gagsl-py at yahoo.com.ar  Wed Jan 17 18:13:24 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 17 Jan 2007 20:13:24 -0300
Subject: Making a simple script standalone
In-Reply-To: <ek8284-od9.ln1@whisper.very.softly>
References: <5d1084-5j7.ln1@whisper.very.softly>
	<mailman.2820.1169032834.32031.python-list@python.org>
	<ek8284-od9.ln1@whisper.very.softly>
Message-ID: <7.0.1.0.0.20070117194341.0337c128@yahoo.com.ar>

At Wednesday 17/1/2007 16:05, Rikishi 42 wrote:

> >>What I want to do is to compile/bundle/prepare/whatever_term a simple
> >>Python script for deployment on a Windows machine. Installing Python
> >>itself on that machine, is not an option. Ideally I would like to obtain
> >>a single executable file, but a script+runtime is acceptable.
> >
> > distutils + py2exe
>
>Tried that, just after asking here.
>A bit messy (poor docs) and a very bloated result.

Consider that, at a bare minimum, you need to include python25.dll 
wich is rather large, and transitive module imports can lead to a 
large library.zip too.
Different "bundlers" may be more or less convenient, have more or 
less documentation, easier or harder to use, but they all make 
comparable file sizes; no one is so dumb to include all the scripts 
reachable along the PYTHONPATH, and on the other hand, if it included 
too few files your script might fail when it can't import a needed module.
See 
http://mail.python.org/pipermail/python-list/2005-August/336851.html 
for a related issue.
If you're going to try different alternatives, posting your findings 
at the end would be a good thing.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From vinay_sajip at yahoo.co.uk  Fri Jan 19 11:40:36 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: 19 Jan 2007 08:40:36 -0800
Subject: My first try using logger didn't work. Why?
In-Reply-To: <1169221734.071338.107190@11g2000cwr.googlegroups.com>
References: <1169221734.071338.107190@11g2000cwr.googlegroups.com>
Message-ID: <1169224835.820468.316040@v45g2000cwv.googlegroups.com>

CedricCicada at gmail.com wrote:

> Greetings!
>
> I want to write messages into the Windows event log.  I found
> sevicemanager, but the source is always "Python Service", and I'd like
> to be a bit more descriptive.  Poking around on the Internet revealed
> the existence of the logging module.  It seems to have easily
> understood methods with the power I need.  So I tried it.  Here's my
> attempt:
>
>             logger = logging.getLogger("TahChung Part 1")
>             logger.setLevel(logging.INFO)
>             eventHandler = logging.NTEventLogHandler()
>             eventHandler.setlevel(logging.INFO)
>             formatter = logging.Formatter("%(message)s")
>             eventHandler.setFormatter(formatter)
>
>             logger.addHandler(eventHandler)
>             logger.error("This comes from the logger object.")
>
> I get no error messages from this, but I also don't get anything in my
> event log.  What am I doing wrong?
>
> By the way, my source of instructions for how to do this was:
> http://www.onlamp.com/pub/a/python/2005/06/02/logging.html
>
> Rob Richardson
> RAD-CON, Inc.

Well Rob,

Your first try didn't work because (based on your posted snippet) it
contained some errors.

The OnLAMP article was nice, but it's always best to go the the actual
documentation:

http://docs.python.org/lib/module-logging.html

Where you will see that NTEventLogHandler (described on page
http://docs.python.org/lib/node418.html) requires an initialiser
argument. Also, "setlevel" is misspelt - it should be "setLevel". The
following slightly modified version of your script puts an entry in the
NT Event Log on my machine:

import logging, logging.handlers

logger = logging.getLogger("TahChung Part 1")
logger.setLevel(logging.INFO)
eventHandler = logging.handlers.NTEventLogHandler("TahChung")
eventHandler.setLevel(logging.INFO)
formatter = logging.Formatter("%(message)s")
eventHandler.setFormatter(formatter)

logger.addHandler(eventHandler)
logger.error("This comes from the logger object.")

Best regards,


Vinay Sajip



From Barry.Carroll at psc.com  Tue Jan  9 20:03:18 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Tue, 9 Jan 2007 17:03:18 -0800
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5 (Final  report)
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A6E@eugsrv400.psc.pscnet.com>

Hi, Gabriel,

> -----Original Message-----
> From: Gabriel Genellina [mailto:gagsl-py at yahoo.com.ar]
> Sent: Tuesday, January 09, 2007 4:06 PM
> To: python-list at python.org
> Subject: RE: File Closing Problem in 2.3 and 2.4, Not in 2.5 (Final
> report)
> 
> At Tuesday 9/1/2007 20:31, Carroll, Barry wrote:
> 
> >I've spent about a day investigating our "too many open files" error.  I
> >found the following:
> >
> >         1. Windows XP allows a Python 2.5 script to open 509 concurrent
> >            files.
> 
> And do you actually need so many open files simultaneously?

No. In fact, that was the original point of my post.  We expected that the maximum number of file objects (open and otherwise) would never be more than five or six.  We believed (apparently incorrectly) that destroying the table parser object would destroy its associated file object and close the referenced file.  Here is the code that does this:

##########
    def unloadtable(self, log=True):
        """Unload current table and pop prior processor from call stack.
        """

        # SNIP

        # force clean up for unloaded table
        self.processor = None
        gc.collect()
        # pop prior processor from stack
        self.processor = self.pstack.pop()

        # SNIP

##########

The first assumption was correct: the file object is destroyed.  The second assumption is apparently incorrect: the file handle is not released when the associated object is destroyed.  These 'orphaned' file handles build up and when the OS handle limit is reached, "too many open files" errors show up.

> Try to close them explicitly when you finish working on them - do
> not rely on GC for closing files. This has *always* been the
> recomended practice (except maybe, inside a short script that
> finishes quickly).

This is what we have done.  The unloadtable function now looks like this:


##########
    def unloadtable(self, log=True):
        """Unload current table and pop prior processor from call stack.
        """

        # SNIP

        # force clean up for unloaded table
        self.processor.source.close()
        self.processor = None
        gc.collect()
        # pop prior processor from stack
        self.processor = self.pstack.pop()

        # SNIP

##########

> On Python 2.5 you can use the new `with` statement.
> 

Not only that, the file errors don't appear when we run our program/table combination under 2.5.  I can't explain the difference, unless the work done to implement the 'with' statement has an impact outside the scope of that feature.  In any event, it does us no good.  Other constraints on the test system require us to stick with Python 2.3, at least for the present.  

> 
> --
> Gabriel Genellina
> Softlab SRL
> 
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya!
> http://www.yahoo.com.ar/respuestas
> 


Thanks for your interest.  
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed





From exarkun at divmod.com  Wed Jan 31 17:20:16 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 31 Jan 2007 17:20:16 -0500
Subject: Any python scripts to do parallel downloading?
In-Reply-To: <45C10FA3.7030208@mvista.com>
Message-ID: <20070131222016.25807.1107543360.divmod.quotient.5093@ohm>

On Wed, 31 Jan 2007 13:52:35 -0800, "Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote:
>Jean-Paul Calderone wrote:
>> On 31 Jan 2007 12:24:21 -0800, Carl Banks <pavlovevidence at gmail.com> wrote:
>>
>>> Michele Simionato wrote:
>>>
>>>> On Jan 31, 5:23 pm, "Frank Potter" <could.... at gmail.com> wrote:
>>>>
>>>>> I want to find a multithreaded downloading lib in python,
>>>>> can someone recommend one for me, please?
>>>>> Thanks~
>>>>>
>>>> Why do you want to use threads for that? Twisted is the
>>>> obvious solution for your problem,
>>>>
>>> Overkill?  Just to download a few web pages?  You've got to be
>>> kidding.
>>>
>>
>> Better "overkill" (whatever that is) than wasting time re-implementing
>> the same boring thing over and over for no reason.
>>
>
>How is that a waste of time?  I wrote the script to do it in 10 lines.
>What is a waste of time is learning a whole new technology/framework to
>do a simple task that can be scripted in 4 minutes.
>

You're right.  Learning new things is bad.  My mistake.

Jean-Paul


From robert.kern at gmail.com  Tue Jan 23 14:07:47 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 23 Jan 2007 13:07:47 -0600
Subject: best package for a physical simulation?
In-Reply-To: <60915.195.220.102.78.1169558458.squirrel@mailgate.phys.ens.fr>
References: <mailman.9299.1169555288.32030.python-list@python.org>
	<60915.195.220.102.78.1169558458.squirrel@mailgate.phys.ens.fr>
Message-ID: <ep5meg$ap9$1@sea.gmane.org>

sittner at lkb.ens.fr wrote:
> Hello everyone,
> i would like to use python to perform some simulation involving collisions
> of colloidal particles.
> which is the best package/engine to do that in python?

What kind of numerical methods does such simulation require?

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From kleiner at hora-obscura.de  Thu Jan 18 05:10:08 2007
From: kleiner at hora-obscura.de (Stefan Palme)
Date: Thu, 18 Jan 2007 11:10:08 +0100
Subject: DOTALL not working as expected
Message-ID: <pan.2007.01.18.10.10.08.356617@hora-obscura.de>


Hi all,

using the "re" module of Python (2.3 and 2.4), I tried the following:

  import re
  print re.sub('X.*?Y', 'Z', 'Xab\ncdY', re.DOTALL)

I wanted to replace
   Xab
   cdY
by a single "Z", but the "." in the pattern does not match the 
included "\n".

When using the pattern "X(.|\n)*?Y" (explicity including "\n"
in the set of "any character") I get the wanted result.

My fault or a bug in the module?

Thanks
-stefan-



From miki.tebeka at gmail.com  Thu Jan 25 20:44:25 2007
From: miki.tebeka at gmail.com (Miki)
Date: 25 Jan 2007 17:44:25 -0800
Subject: stop script w/o exiting interpreter
In-Reply-To: <Lyauh.8689$QE6.2176@trnddc02>
References: <Lyauh.8689$QE6.2176@trnddc02>
Message-ID: <1169775865.519601.121290@h3g2000cwc.googlegroups.com>

Hello Alan,

> I'm fairly new to Python and I've lately been running a script at
> the interpreter while working on it.  Sometimes I only want to
> run the first quarter or half etc.  What is the "good" way to do this?
If you want to exit from the program then "raise SystemExit" is what
you want.
If you want to enter the debugger, you can do:

from pdb import set_trace

...
set_trace() # Stop and execute debugger here.
...

HTH,
--
Miki
http://pythonwise.blogspot.com



From arkanes at gmail.com  Wed Jan 24 15:05:31 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 24 Jan 2007 14:05:31 -0600
Subject: Regex for URL extracting
In-Reply-To: <1169665668.999341.183480@a75g2000cwd.googlegroups.com>
References: <1169655624.981833.29730@j27g2000cwj.googlegroups.com>
	<1169665668.999341.183480@a75g2000cwd.googlegroups.com>
Message-ID: <4866bea60701241205w4f03db4cka209f3d632150b98@mail.gmail.com>

On 24 Jan 2007 11:07:49 -0800, Paul McGuire <ptmcg at austin.rr.com> wrote:
> On Jan 24, 10:20 am, "Johny" <pyt... at hope.cz> wrote:
> > Does anyone know about a good regular expression  for URL extracting?
> >
> > J.
> Google turns this up:
>
> http://geekswithblogs.net/casualjim/archive/2005/12/01/61722.aspx
>
> But I've seen other re's for this problem that are hundreds of
> characters long.
>
> -- Paul
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

These are the regexps that gnome-terminal uses for it's URL
auto-recognition, and I have shamelessly stolen them for use in one of
my own apps:

urlfinders = [
    re.compile("([0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}|(((news|telnet|nttp|file|http|ftp|https)://)|(www|ftp)[-A-Za-z0-9]*\\.)[-A-Za-z0-9\\.]+)(:[0-9]*)?/[-A-Za-z0-9_\\$\\.\\+\\!\\*\\(\\),;:@&=\\?/~\\#\\%]*[^]'\\.}>\\),\\\"]"),
    re.compile("([0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}|(((news|telnet|nttp|file|http|ftp|https)://)|(www|ftp)[-A-Za-z0-9]*\\.)[-A-Za-z0-9\\.]+)(:[0-9]*)?"),
    re.compile("(~/|/|\\./)([-A-Za-z0-9_\\$\\.\\+\\!\\*\\(\\),;:@&=\\?/~\\#\\%]|\\\\
)+"),
    re.compile("'\\<((mailto:)|)[-A-Za-z0-9\\.]+@[-A-Za-z0-9\\.]+"),
]


From bearophileHUGS at lycos.com  Tue Jan  2 21:28:23 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Jan 2007 18:28:23 -0800
Subject: Writing more efficient code
In-Reply-To: <459b03e5$0$8725$ed2619ec@ptn-nntp-reader02.plus.net>
References: <mailman.2185.1167676577.32031.python-list@python.org>
	<459959ea$0$8719$ed2619ec@ptn-nntp-reader02.plus.net>
	<1167687229.430930.197720@v33g2000cwv.googlegroups.com>
	<459989ec$0$8759$ed2619ec@ptn-nntp-reader02.plus.net>
	<1167699678.310643.140480@n51g2000cwc.googlegroups.com>
	<459b03e5$0$8725$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <1167791303.898576.47680@42g2000cwt.googlegroups.com>

Jon Harrop:
> I think this sort of functionality would be a welcome addition to Python.

I don't know.


> Perhaps it can be written in Python?

Pyparsing and beautifulsoup show that practically useful parsing
modules can be done using Python alone too.
Set module of Python 2.3, translated to C in Python 2.4 and improved in
Python 2.5 shows that sometimes Python is fit to create prototypes that
can be debugged, and whose API can be improved, and they can later
translated to a faster language.
But the decimal module shows that sometimes such translation can become
a bit difficult.
The re module shows that external modules too can be good enough
compared of Perl/Ruby built-in regex syntax.
Beside Python, various much faster languages may be used, like D,
Pyrex, C, or your loved OCaml. Or theoretically even ShedSkin. I think
D may be fit, the "Pyd" Python <-> D bridge is quite good, and it's
improving. And D is reaching version 1.0.
OCaml maybe can be used to produce Python compiled modules, so it can
be a possibility too, but then very few people are able to maintain it,
so maybe it's better to use a more common language (even D is more
common, because its syntax is easy to grasp by C++ programmers).


> What is the easiest way to add such functionality to Python?

I think implementation language isn't the main problem. I think the
definition of the purpose and API are more difficult.
Mathematica allows you to define rules that let the system chose the
right function (among some with the same name) according to the input
pattern or the kind of input. Guido has discussed some about something
similar, the multimethods. There are some ways and tricks to add such
capabilities to Python, but I don't think they are fast and reliable
enough for real programs. Maybe Python 3.0 will change this some.
If you want just to create something like a regular engine that works
on lists, that contains matching rules, rewriting rules and calls to
many user-defined functions, then I think you can do it with Python
(with Psyco if you want) in few lines (a really basic RE on lists can
be defined in about 20 lines, maybe a good system may can be built with
2000-10000 lines), but I don't know how much useful it can be, maybe it
can find some purpose (and maybe someone has already written such
module).


> I think that is an excellent idea. Who will pay me? ;-)

I don't know, probably no one. Most people don't even know how to use
such pattern matching programming paradigm. For Python it may become
just an experiment.

Bye,
bearophile



From skip at pobox.com  Sat Jan 13 19:58:45 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 13 Jan 2007 18:58:45 -0600
Subject: Newbie - converting csv files to arrays in NumPy - Matlab vs.
	Numpy comparison
In-Reply-To: <1168735174.140171.74930@v45g2000cwv.googlegroups.com>
References: <1168373279.943232.228160@o58g2000hsb.googlegroups.com>
	<mailman.2496.1168375040.32031.python-list@python.org>
	<1168458486.538863.316130@k58g2000hse.googlegroups.com>
	<eo78ah$dqc$1@sea.gmane.org>
	<mailman.2633.1168583356.32031.python-list@python.org>
	<1168715634.695961.14710@l53g2000cwa.googlegroups.com>
	<1168728465.178605.218850@q2g2000cwa.googlegroups.com>
	<1168735174.140171.74930@v45g2000cwv.googlegroups.com>
Message-ID: <17833.32837.216986.1686@montanaro.dyndns.org>


    oyekomova> def read_test():
    oyekomova>     start  = time.clock()
    oyekomova>     reader = csv.reader( file('data.txt') )
    oyekomova>     data   = [ map(float, row) for row in reader ]
    oyekomova>     data   = array(data, dtype = float)
    oyekomova>     print 'Data size', len(data)
    oyekomova>     print 'Elapsed', time.clock() - start

You have the entire file in memory as well as the entire array.  Try
operating line-by-line.

    #!/usr/bin/env python

    import array
    import time
    import random
    import csv

    def make_data(nrows=1000000, cols=6):
        counter = range(cols)
        writer = csv.writer(open('data.txt', 'wt'))
        for row in xrange(nrows):
            writer.writerow([random.random() for x in counter])

    def read_test():
        reader = csv.reader( file('data.txt') )
        data = array.array('f')
        for row in reader:
            data.extend(map(float, row))
        print 'Data size', len(data)

    start = time.clock()
    make_data()
    print "generate data:", (time.clock()-start)

    start = time.clock()
    read_test()
    print "read data:", (time.clock()-start)

Skip


From horpner at yahoo.com  Mon Jan  8 09:53:40 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 8 Jan 2007 15:53:40 +0100
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<Heboh.7514$pQ3.6865@newsread4.news.pas.earthlink.net>
	<7xhcv2195o.fsf@ruckus.brouhaha.com>
Message-ID: <slrneq4mr2.k8.horpner@FIAD06.norwich.edu>

On 2007-01-08, Paul Rubin <http> wrote:
> Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:
>> I'd be quite concerned about the design environment rather than the
>> immediate code... Probably need something ugly like...
>> 
>> from mod1 import B as B1
>> from mod2 import B as B2
>> class A(B1, B2):
>> 	....
>
> Interesting.  I just tried that.  mod1.py contains:
>
>     class B:
>         def foo(self): self.__x = 'mod1'
>
> mod2.py contains:
>
>     class B:
>         def bar(self): self.__x = 'mod2'
>
> And the test is:
>
>     from mod1 import B as B1
>     from mod2 import B as B2
>
>     class A(B1, B2): pass
>
>     a = A()
>     a.foo()
>     print a._B__x
>     a.bar()
>     print a._B__x
>
> Sure enough, mod2 messes up mod1's private variable.

When faced with this situation, is there any way to proceed
besides using composition instead?

-- 
Neil Cerutti
We've got to pause and ask ourselves: How much clean air do we really need?
--Lee Iacocca


From steve at REMOVE.THIS.cybersource.com.au  Tue Jan  9 10:26:50 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 10 Jan 2007 02:26:50 +1100
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<ct1oh.8348$w91.141@newsread1.news.pas.earthlink.net>
	<7x7ivz88af.fsf@ruckus.brouhaha.com>
	<mailman.2385.1168171076.32031.python-list@python.org>
	<7xmz4v11jq.fsf@ruckus.brouhaha.com>
	<mailman.2414.1168264117.32031.python-list@python.org>
	<pan.2007.01.08.22.24.34.419033@REMOVE.THIS.cybersource.com.au>
	<mailman.2474.1168332187.32031.python-list@python.org>
Message-ID: <pan.2007.01.09.15.26.50.282717@REMOVE.THIS.cybersource.com.au>

On Tue, 09 Jan 2007 10:27:56 +0200, Hendrik van Rooyen wrote:

> "Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> wrote:
> 
> 
>> On Mon, 08 Jan 2007 13:11:14 +0200, Hendrik van Rooyen wrote:
>>
>> > When you hear a programmer use the word "probability" -
>> > then its time to fire him, as in programming even the lowest
>> > probability is a certainty when you are doing millions of
>> > things a second.
>>
>> That is total and utter nonsense and displays the most appalling
>> misunderstanding of probability, not to mention a shocking lack of common
>> sense.
> 
> Really?
> 
> Strong words.
> 
> If you don't understand you need merely ask, so let me elucidate:
> 
> If there is some small chance of something occurring at run time that can
> cause code to fail - a "low probability" in all the accepted senses of the
> word - and a programmer declaims - "There is such a low probability of
> that occurring and its so difficult to cater for that I won't bother"
> - then am I supposed to congratulate him on his wisdom and outstanding
> common sense?
> 
> Hardly. - If anything can go wrong, it will. - to paraphrase Murphy's law.
> 
> To illustrate:
> If there is one place in any piece of code that is critical and not protected,
> even if its in a relatively rarely called routine, then because of the high
> speed of operations, and the fact that time is essentially infinite, 

Time is essentially infinite? Do you really expect your code will still be
in use fifty years from now, let alone a billion years?

I know flowcharts have fallen out of favour in IT, and rightly so -- they
don't model modern programming techniques very well, simply because modern
programming techniques would lead to a chart far too big to be practical.
But for the sake of the exercise, imagine a simplified flowchart of some
program, one with a mere five components, such that one could take any of
the following paths through the program:

START -> A -> B -> C -> D -> E
START -> A -> C -> B -> D -> E
START -> A -> C -> D -> B -> E
...
START -> E -> D -> C -> B -> A

There are 5! (five factorial) = 120 possible paths through the program.

Now imagine one where there are just fifty components, still quite a
small program, giving 50! = 3e64 possible paths. Now suppose that there is
a bug that results from following just one of those paths. That would
match your description of "lowest probability" -- any lower and it would
be zero.

If all of the paths are equally likely to be taken, and the program takes
a billion different paths each millisecond, on average it would take about
1.5e55 milliseconds to hit the bug -- or about 5e44 YEARS of continual
usage. If every person on Earth did nothing but run this program 24/7, it
would still take on average almost sixty million billion billion billion
years to discover the bug.

But of course in reality some paths are more likely than others. If the
bug happens to exist in a path that is executed often, or if it exists
in many paths, then the bug will be found quickly. On the other hand, if
the bug is in a path that is rarely executed, your buggy program may be
more reliable than the hardware you run it on. (Cynics may say that isn't
hard.)

You're project manager for the development team. Your lead developer tells
you that he knows this bug exists (never mind how, he's very clever) and
that the probability of reaching that bug in use is about 3e-64. 

If it were easy to fix, the developer wouldn't even have mentioned it.
This is a really hard bug to fix, it's going to require some major
changes to the program, maybe even a complete re-think of the program.
Removing this bug could even introduce dozens, hundreds of new bugs.

So okay Mister Project Manager. What do you do? Do you sack the developer,
like you said? How many dozens or hundreds of man-hours are you prepared
to put into this? If the money is coming out of your pocket, how much are
you willing to spend to fix this bug?


[snip]

> How is this a misunderstanding of probability?  - probability applies to
> any one trial, so in a series of trials, when the number of trials is
> large enough - in the
> order of the inverse of the probability, then ones expectation must be
> that the rare occurrence should occur...

"Even the lowest probability is a certainty" is mathematically nonsense:
it just isn't true -- no matter how many iterations, the probability is
always a little less than one. And you paper over a hole in your argument
with "when the number of trials is large enough" -- if the probability is
small enough, "large enough" could be unimaginably huge indeed.

Or, to put it another way, while anything with a non-zero probability
_might_ happen (you might drop a can of soft drink on your computer,
shorting it out and _just by chance_ causing it to fire off a perfectly
formatted email containing a poem about penguins) we are justified in
writing off small enough probabilities as negligible. It's not that they
can't happen, but the chances of doing so are so small that we can rightly
expect to never see them happen.

You might like to read up on Borel's "Law" (not really a law at all,
really just a heuristic for judging when probabilities are negligible).
Avoid the nonsense written about Borel and his guideline by Young Earth
Creationists, they have given him an undeserved bad name. 

http://www.talkorigins.org/faqs/abioprob/borelfaq.html


> There is a very low probability that any one gas molecule will collide
> with any other one in a container

Not so. There is a very low probability that one gas molecule will collide
with a _specific_ other molecule -- but the probability of colliding with
_any_ other molecule is very high.


> - and  "Surprise!  Surprise! " there
> is nevertheless something like the mean free path...

Yes. And that mean free path increases without limit as the volume of the
gas increases. Take your molecule into the space between stars, and the
mean free path might be dozens of lightyears -- even though there is
actually more gas in total than in the entire Earth.


> Now how does all this show a shocking lack of common sense?

You pay no attention to the economics of programming. Programming doesn't
come for free. It is always a trade-off for the best result with the least
effort. Any time people start making absolute claims about fixing every
possible bug, no matter how obscure or unlikely or how much work it will
take, I know that they aren't paying for the work to be done.



-- 
Steven.



From grahn+nntp at snipabacken.dyndns.org  Sun Jan  7 10:00:21 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 7 Jan 2007 15:00:21 GMT
Subject: program deployment
References: <1167998448.978001.3720@38g2000cwa.googlegroups.com>
	<1168002070.704739.76470@q40g2000cwq.googlegroups.com>
	<1168004752.091662.178060@s80g2000cwa.googlegroups.com>
	<12psqtppgi5cme6@corp.supernews.com>
Message-ID: <slrneq21bh.tcj.grahn+nntp@frailea.sa.invalid>

On Fri, 05 Jan 2007 15:16:09 -0000, Grant Edwards <grante at visi.com> wrote:
> On 2007-01-05, king kikapu <aboudouvas at panafonet.gr> wrote:
>
>>> Python code is normally deployed as straight source code.
>>
>> But isn't this a problem of its own? I mean, many people do not feel
>> good if the know that their source code is lying around on other
>> machines...
>
> Are they embarassed by their code?

For companies, that may be one reason.  For many companies, rightly so ...

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From garyjefferson123 at yahoo.com  Sun Jan 21 22:49:23 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: 21 Jan 2007 19:49:23 -0800
Subject: selective logger disable/enable
In-Reply-To: <1169395276.181654.160810@a75g2000cwd.googlegroups.com>
References: <1169190498.593059.238150@q2g2000cwa.googlegroups.com>
	<1169204564.348768.186900@38g2000cwa.googlegroups.com>
	<1169349399.938121.238430@38g2000cwa.googlegroups.com>
	<1169395276.181654.160810@a75g2000cwd.googlegroups.com>
Message-ID: <1169437763.213781.163660@38g2000cwa.googlegroups.com>


Vinay Sajip wrote:
>
> I don't know enough about your target environment and application to
> necessarily give you the best advice, but I'll make some general
> comments which I hope are useful. You seem to be thinking that loggers
> are binary - i.e. you turn them on or off. But they can be controlled
> more finely than that; you should be able to get the effect that you
> want by using the different logging levels available judiciously, as
> well as using the fact that loggers inhabit a named hierarchy. Note
> that loggers, by default, inherit the level of the first ancestor
> logger which has an explicitly set level (by ancestor, I mean in the
> name hierarchy). The root logger's default level is WARNING, so by
> default all loggers will work at this level. [N.B. You can also set
> levels for individual handlers, e.g. to ensure that only CRITICAL
> conditions are emailed to a specified email address using SMTPHandler,
> or that ERROR conditions and above are written to file but not to
> console.]
>
> So, for your networking scenario, let's suppose you do the following:
> Have all network loggers live in the hierarchy namespace below
> "network" (e.g. "network", "network.tcp", "network.http" etc.). By
> default, all of these will only log events of severity WARNING and
> above. Also, suppose you log events in your application code, which are
> sometimes but not always of interest, at level DEBUG or level INFO.
> Then, these events will never show up in the logging output, since they
> are below WARNING in severity. Subsequently, if you want to turn on
> logging verbosity for the network code only, you can arrange, via a
> command-line switch or environment variable or configuration file, to
> do
>
> logging.getLogger("network").setLevel(logging.DEBUG)
>
> whereupon you will start seeing events from the networking code at
> severity DEBUG and INFO. This will affect all loggers in the "network"
> hierarchy whose levels you have not explicitly set (so that they will
> get the effective level of the first ancestor which has a level
> explicitly set - the logger named "network").
>
> If all you are interested in is turning on verbosity based on different
> event severities (levels), you should not need to use or set Filters.
> Filters are for use only when levels don't meet your use case
> requirements.
>
> Best regards,
>
> Vinay Sajip


Vinay, okay, I think what you described will work out for me -- thank
you very much for the explanation.

I am still a bit confused about Filters, though.  It seems they are a
bit of an anomoly in the hierarchical view of loggers that the API
supports elsewhere, i.e., filters don't seem to inherit...  Or am I
missing something again?  Here's a quick example:

import logging

log1 = logging.getLogger("top")
log2 = logging.getLogger("top.network")
log3 = logging.getLogger("top.network.tcp")
log4 = logging.getLogger("top.network.http")
log5 = logging.getLogger("top.config")
log6 = logging.getLogger("top.config.file")

logging.basicConfig(level=logging.DEBUG,
        format='%(asctime)s %(levelname)s %(message)s')

filter = logging.Filter("top.network")
log1.addFilter(filter)  # only affects log1, do this for each of log2-7
too?

log1.debug("I'm top")
log2.debug("I'm top.network")
log3.debug("I'm top.network.tcp")
log4.debug("I'm top.network.http")
log5.debug("I'm top.config")
log6.debug("I'm top.config.file")


This is only for the binary case (and I think if I ignore the binary
case and filters altogether as you suggested), but it really would be
nice to be able to squelch /all/ output from loggers that belong to
certain parts of the namespace by using a filter as above (which I
can't get to work).

Perhaps if I set up a basicConfig with a loglevel of nothing, I can get
this to approximate squelching of everything but that which I
explicitly setLevel (which does inherit properly).

In other words, the addFilter/removeFilter part of the API seems rather
impotent if it can't be inherited in the logging namespaces.  In fact,
I can't really figure out a use case where I could possibly want to use
it without it inheriting.  Obviously I'm missing something.  I'm sure
I've consumed more attention that I deserve already in this thread,
but, do you have any pointers which can enlighten me as to how to
effectively use addFilter/removeFilter?

many thanks,
Gary



From S.Mientki-nospam at mailbox.kun.nl  Sat Jan  6 15:24:02 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sat, 06 Jan 2007 21:24:02 +0100
Subject: still struggling, howto use a list-element as a name ?
In-Reply-To: <Xns98B0968123CFErzantowgmailcom@208.49.80.253>
References: <b7908$459fef43$d443bb3a$26766@news.speedlinq.nl>
	<Xns98B0968123CFErzantowgmailcom@208.49.80.253>
Message-ID: <182cf$45a00556$d443bb3a$17174@news.speedlinq.nl>

>> class Power_Supply(device):
>>      pinlist = {
>>          0: ('GND', _DIG_OUT, _par2),
>>          1: ('VCC', _DIG_OUT, _par33)
>>          }
> 
> I may be confused about what you're after, but wouldn't something 
> like this work? (I don't know what a _par2 object is; I've named 
> it something here.)
_par2, is just (a reference to) a constant
> 
> class Power_Supply(device):
>     def __init__(self):
>         self.pin = {
>             0:dict(Name='GND',Value=_DIG_OUT,something=_par2),
>             1:dict(Name='VCC',Value=_DIG_OUT,something=_par33),
>         }
Why so complex, I need 10 or more parameters (or empty),
and then this becomes completely unreadable.
As this is part of the "user interface",
(I want that completely unknown with Python people,
write these lines),
I think my "pinlist" is much easier.


>         for k in self.pin.keys():
>             self.__dict__[self.pin[k]['Name']] = self.pin[k]
thanks "rzed" ?,
that is exactly what I was looking for:
               self.__dict__[self.pinlist[k][0]] = self.pin[k]


cheers,
Stef


From tomerfiliba at gmail.com  Tue Jan 23 06:45:31 2007
From: tomerfiliba at gmail.com (gangesmaster)
Date: 23 Jan 2007 03:45:31 -0800
Subject: free variables /cell objects question
Message-ID: <1169552731.189786.274930@s48g2000cws.googlegroups.com>

why does CPython require to wrap the free variables if
closure functions by a cell objects?
why can't it just pass the object itself?

>>> def f(x):
...     def g():
...             return x+2
...     return g
...
>>> g5 = f(5)
>>> dis(g5)
  3           0 LOAD_DEREF               0 (x)
              3 LOAD_CONST               1 (2)
              6 BINARY_ADD
              7 RETURN_VALUE
>>> dis(f)
  2           0 LOAD_CLOSURE             0 (x)
              3 BUILD_TUPLE              1
              6 LOAD_CONST               1 (<code objec...
              9 MAKE_CLOSURE             0
             12 STORE_FAST               1 (g)

  4          15 LOAD_FAST                1 (g)
             18 RETURN_VALUE
>>>

i don't see why dereferencing is needed. why not just pass
the object itself to the MAKE_CLOSURE? i.e.

LOAD_FAST 0    (x)
LOAD_CONST 1 (the code object)
MAKE_CLOSURE 0

what problem does the cell object solve? 


-tomer



From tim.one at comcast.net  Tue Jan  9 13:03:45 2007
From: tim.one at comcast.net (Tim Peters)
Date: Tue, 09 Jan 2007 12:03:45 -0600
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
	<envur1$rq1$1@gemini.csx.cam.ac.uk>
	<mailman.2480.1168350033.32031.python-list@python.org>
Message-ID: <Xns98B384E126F4Ctim111one@216.196.97.136>

[Rory Campbell-Lange]
>>> Is using the decimal module the best way around this? (I'm
>>> expecting the first sum to match the second). It seem
>>> anachronistic that decimal takes strings as input, though.

[Nick Maclaren]
>> As Dan Bishop says, probably not.  The introduction to the decimal
>> module makes exaggerated claims of accuracy, amounting to propaganda.
>> It is numerically no better than binary, and has some advantages
>> and some disadvantages.

[Carsten Haese]
> Please elaborate. Which exaggerated claims are made,

Well, just about any technical statement can be misleading if not qualified 
to such an extent that the only people who can still understand it knew it 
to begin with <0.8 wink>.  The most dubious statement here to my eyes is 
the intro's "exactness carries over into arithmetic".  It takes a world of 
additional words to explain exactly what it is about the example given (0.1 
+ 0.1 + 0.1 - 0.3 = 0 exactly in decimal fp, but not in binary fp) that 
does, and does not, generalize.  Roughly, it does generalize to one 
important real-life use-case:  adding and subtracting any number of decimal 
quantities delivers the exact decimal result, /provided/ that precision is 
set high enough that no rounding occurs.

> and how is decimal no better than binary?

Basically, they both lose info when rounding does occur.  For example,

>>> import decimal
>>> 1 / decimal.Decimal(3)
Decimal("0.3333333333333333333333333333")
>>> _ * 3
Decimal("0.9999999999999999999999999999")

That is, (1/3)*3 != 1 in decimal.  The reason why is obvious "by eyeball", 
but only because you have a lifetime of experience working in base 10.  A 
bit ironically, the rounding in binary just happens to be such that (1/3)/3 
does equal 1:

>>> 1./3
0.33333333333333331
>>> _ * 3
1.0

It's not just * and /.  The real thing at work in the 0.1 + 0.1 + 0.1 - 0.3 
example is representation error, not sloppy +/-:  0.1 and 0.3 can't be 
/represented/ exactly as binary floats to begin with.  Much the same can 
happen if you instead you use inputs exactly representable in base 2 but 
not in base 10 (and while there are none such if precision is infinite, 
precision isn't infinite):

>>> x = decimal.Decimal(1) / 2**90
>>> print x
8.077935669463160887416100508E-28
>>> print x + x + x - 3*x   # not exactly 0
1E-54

The same in binary f.p. is exact, because 1./2**90 is exactly representable 
in binary fp:

>>> x = 1. / 2**90
>>> print x  # this displays an inexact decimal approx. to 1./2**90
8.07793566946e-028
>>> print x + x + x - 3*x  # but the binary arithmetic is exact
0.0

If you boost decimal's precision high enough, then this specific example is 
also exact using decimal; but with the default precision of 28, 1./2**90 
can't be represented exactly in decimal to begin with; e.g.,

>>> decimal.Decimal(1) / 2**90 * 2**90
Decimal("0.9999999999999999999999999999")

All forms of fp are subject to representation and rounding errors.  The 
biggest practical difference here is that the `decimal` module is not 
subject to representation error for "natural" decimal quantities, provided 
precision is set high enough to retain all the input digits.  That's worth 
something to many apps, and is the whole ball of wax for some apps -- but 
leaves a world of possible "surprises" nevertheless.


From tubby at bandaheart.com  Thu Jan 25 17:09:42 2007
From: tubby at bandaheart.com (tubby)
Date: Thu, 25 Jan 2007 17:09:42 -0500
Subject: pdf to text
In-Reply-To: <86714$45b9254c$54d1d767$3741@news.chello.no>
References: <epb638$gd4$1@solaris.cc.vt.edu>
	<86714$45b9254c$54d1d767$3741@news.chello.no>
Message-ID: <epb9s7$nnk$1@solaris.cc.vt.edu>

David Boddie wrote:

> The pdftotext tool may do what you want:
> 
>   http://www.foolabs.com/xpdf/download.html
> 
> Let us know how you get on with it.
> 
> David

Perhaps I'm just using pdftotext wrong? Here's how I was using it:

f = filename

try:
     sout = os.popen('pdftotext "%s" - ' %f)
     data = sout.read().strip()
     print data
     sout.close()

except Exception, e:
     print e


From __peter__ at web.de  Sun Jan 28 04:15:39 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 28 Jan 2007 10:15:39 +0100
Subject: set update in 2.5
References: <45bc0c0c.0@entanet>
Message-ID: <ephpiv$pgb$02$1@news.t-online.com>

Duncan Smith wrote:

>      In moving from 2.4 to 2.5 I find that some of my unit tests are now
> failing.  I've worked out that the problem relates to the set update
> method.  In 2.4 I could update a set with an iterable type derived from
> dict as the argument.  I now find that the set is updated with the hash
> values of the items in my iterable, rather than the items themselves.
> Converting to a list first gets round the problem.
> 
> My iterable type has the same API as 'set' but requires items to have
> hashable 'uid' attributes, so they can also be looked up by uid.  I hope
> this, and the fact that this worked fine in 2.4 will be enough to track
> down the issue without me having to paste reams of code (other than the
> following, pasted from IDLE).  Any ideas?  Cheers.
> 
> Duncan
> 
> 
>>>> from graphItems import Node
>>>> from keyed_sets import KeyedSet
>>>> n = Node(1)
>>>> n.uid
> 1
>>>> k = KeyedSet([n])
>>>> k
> KeyedSet([1])
>>>> type(iter(k).next())
> <class 'graphItems.Node'>
>>>> type(k[1])
> <class 'graphItems.Node'>
>>>> s = set()
>>>> s.update(list(k))
>>>> type(iter(s).next())
> <class 'graphItems.Node'>
>>>> s = set()
>>>> s.update(k)
>>>> type(iter(s).next())
> <type 'int'>
>>>> s = set()
>>>> s.add(n)
>>>> type(iter(s).next())
> <class 'graphItems.Node'>
>>>> hash(n)
> 1
>>>>

Is your KeyedSet derived from dict?

$ python2.5
[snip]
>>> class D(dict):
...     def __iter__(self): return self.itervalues()
...
>>> d = D(a=1, b=2)
>>> set(d)
set(['a', 'b'])
>>>

$ python2.4
[snip]
>>> class D(dict):
...     def __iter__(self): return self.itervalues()
...
>>> d = D(a=1, b=2)
>>> set(d)
set([1, 2])


I think you should file a bug report. The fix is probably

--- setobject.c 2006-09-08 08:02:26.000000000 +0200
+++ setobject_new.c     2007-01-28 10:02:24.071688248 +0100
@@ -854,7 +854,7 @@
        if (PyAnySet_Check(other))
                return set_merge(so, other);

-       if (PyDict_Check(other)) {
+       if (PyDict_CheckExact(other)) {
                PyObject *value;
                Py_ssize_t pos = 0;
                while (PyDict_Next(other, &pos, &key, &value)) {

Peter


From __peter__ at web.de  Tue Jan 23 07:02:49 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 23 Jan 2007 13:02:49 +0100
Subject: free variables /cell objects question
References: <1169552731.189786.274930@s48g2000cws.googlegroups.com>
Message-ID: <ep4tgk$bpa$00$2@news.t-online.com>

gangesmaster wrote:

> why does CPython require to wrap the free variables if
> closure functions by a cell objects?
> why can't it just pass the object itself?
> 
>>>> def f(x):
> ...     def g():
> ...             return x+2
> ...     return g
> ...
>>>> g5 = f(5)
>>>> dis(g5)
>   3           0 LOAD_DEREF               0 (x)
>               3 LOAD_CONST               1 (2)
>               6 BINARY_ADD
>               7 RETURN_VALUE
>>>> dis(f)
>   2           0 LOAD_CLOSURE             0 (x)
>               3 BUILD_TUPLE              1
>               6 LOAD_CONST               1 (<code objec...
>               9 MAKE_CLOSURE             0
>              12 STORE_FAST               1 (g)
> 
>   4          15 LOAD_FAST                1 (g)
>              18 RETURN_VALUE
>>>>
> 
> i don't see why dereferencing is needed. why not just pass
> the object itself to the MAKE_CLOSURE? i.e.
> 
> LOAD_FAST 0    (x)
> LOAD_CONST 1 (the code object)
> MAKE_CLOSURE 0
> 
> what problem does the cell object solve?

If I understand you correctly:

def f(x):
    def g():
        return x + 2
    x = 42
    return g
assert f(0)() == 44

Peter



From ptmcg at austin.rr._bogus_.com  Fri Jan  5 17:27:49 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 5 Jan 2007 16:27:49 -0600
Subject: Dividing integers...Convert to float first?
References: <1168017342.255981.134400@11g2000cwr.googlegroups.com><459E8B5C.6020804@gmx.net><mailman.2336.1168018559.32031.python-list@python.org><12pt3f3kc1jmcf8@corp.supernews.com>
	<mailman.2339.1168019925.32031.python-list@python.org>
Message-ID: <459ed0e7$0$16932$4c368faf@roadrunner.com>

"Simon Brunning" <simon at brunningonline.net> wrote in message 
news:mailman.2339.1168019925.32031.python-list at python.org...
> On 1/5/07, Grant Edwards <grante at visi.com> wrote:
>>    >>> from __future__ import LotteryNumbers
>>      File "<stdin>", line 1
>>    SyntaxError: future feature LotteryNumbers is not defined
>>
>> Damn.
>>
>> I guess it's back to work then.
>
> Remember the PEP 8 module name standards.
>
>>>> from __future__ import lottery_numbers
> [1, 16, 19, 20, 21, 39]
>
> -- 
> Cheers,
> Simon B
> simon at brunningonline.net


The computer printed it out, it must be correct!  We can all become 
millionaires!

(Now if we only knew which drawing in the future, and from which lottery...)

-- Paul




From michael at mustun.ch  Wed Jan  3 11:00:07 2007
From: michael at mustun.ch (Michael)
Date: Wed, 03 Jan 2007 17:00:07 +0100
Subject: code optimization (calc PI)
In-Reply-To: <XgQmh.98$9v1.124@nntpserver.swip.net>
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
	<5020j6F1du59cU1@mid.uni-berlin.de>
	<XgQmh.98$9v1.124@nntpserver.swip.net>
Message-ID: <%pQmh.103$9v1.124@nntpserver.swip.net>


Ah, no. It was a HASH (assoziative Array or somethings like that).


mm wrote:
> 
> I konw, that for example while-loops in Perl are very slow. Maybe this 
> is also known in Pyhton. Then, I can translate the while-loops in to 
> for-loops, for example.
> More general, maybe there is a speed optimazation docu out there.
> 


From toto at titi.de  Fri Jan  5 16:23:34 2007
From: toto at titi.de (laurent rahuel)
Date: Fri, 05 Jan 2007 22:23:34 +0100
Subject: importing / loading a module / class dynamically
In-Reply-To: <o1vnh.281$rv1.88@newsfe21.lga>
References: <o1vnh.281$rv1.88@newsfe21.lga>
Message-ID: <459ec2cc$0$21147$7a628cd7@news.club-internet.fr>

Hi,

Using exec or eval ISN'T what should be done ever. When you have 
troubles importing you should :

- Add some repository to your sys.path
and/or
- Use the buildin import method
and/or
- Use Mr Eby's Importing module (http://python.org/pypi/Importing)

Regards,

Laurent

hg a ?crit :
> Hi,
> 
> I have the following problem.
> 
> I find in a directory hierarchy some files following a certain sets of
> rules:
> 
> .../.../../plugin/name1/name1.py
> ....
> .../.../../plugin/namen/namen.py
> 
> each file will in turn have a class with the same name as the filename
> (minus .py)
> 
> 
> I fetch those names in a list of string and want to import the files /
> instantiate the classes.
> 
> 
> I block at the beginning and tried this (test.py is a real file)
>>>> s = 'test.py'
>>>> eval ('import ' + s)
> 
> and get 
> 
> Traceback (most recent call last):
>   File "<pyshell#1>", line 1, in -toplevel-
>     eval ('import ' + s)
>   File "<string>", line 1
>     import test.py
> 
> Any clue ?
> 
> Thanks
> 
> hg
> 


From risomt at gmail.com  Wed Jan 31 02:32:27 2007
From: risomt at gmail.com (risomt at gmail.com)
Date: 30 Jan 2007 23:32:27 -0800
Subject: PY Zip
In-Reply-To: <1170220732.552072.163560@k78g2000cwa.googlegroups.com>
References: <1170220732.552072.163560@k78g2000cwa.googlegroups.com>
Message-ID: <1170228747.334418.136290@v45g2000cwv.googlegroups.com>

On Jan 31, 12:18 am, "GISDude" <gisdudes... at gmail.com> wrote:
> Hi all.
>
> I am trying to find a module that has a Zip utility that I can use in
> Python. I would like to be able to call the module and ZIP up a
> directory. I thought there was such a module, but I have not been able
> to find it.
>
> I need this to be able to be used in Python Win. Is there a ZIP utilty
> already stored with a basic PYTHON download?
>
> Thanks all.

the module is named "zipfile" (http://docs.python.org/lib/module-
zipfile.html)

http://docs.python.org/lib/zipfile-objects.html#zipfile-objects has
more indepth information on all functions

I can't say i've ever used it, but it seems pretty straightforward and
mostly reminiscent of the basic read/write file modules.



From tew24 at spam.ac.uk  Tue Jan 30 06:13:33 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Tue, 30 Jan 2007 11:13:33 +0000
Subject: select windows
References: <eplvcn$773$1@aioe.org>
	<InBvh.16134$pQ3.6592@newsread4.news.pas.earthlink.net>
Message-ID: <epn98t$4a0$1@gemini.csx.cam.ac.uk>

Dennis Lee Bieber wrote:
> (And the Amiga could add even more complexity -- I still miss the
> Amiga's ability to PUSH a window to the back while STILL KEEPING
> FOCUS... Made it easy to type stuff into one window while reading data
> from a covering window!)

KDE's window manager can do this (and it is useful, you're right).  I
suspect most other window managers will offer it as an option, too.

-- 
I'm at CAMbridge, not SPAMbridge


From gagsl-py at yahoo.com.ar  Tue Jan 16 20:10:00 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 16 Jan 2007 22:10:00 -0300
Subject: Search Queue
In-Reply-To: <Hp8rh.15193$X72.10841@newsread3.news.pas.earthlink.net>
References: <1168960945.787822.286690@s34g2000cwa.googlegroups.com>
	<1168962673.664083.146220@38g2000cwa.googlegroups.com>
	<1168964356.125262.45110@v45g2000cwv.googlegroups.com>
	<Hp8rh.15193$X72.10841@newsread3.news.pas.earthlink.net>
Message-ID: <7.0.1.0.0.20070116215719.042859f0@yahoo.com.ar>

At Tuesday 16/1/2007 15:01, Dennis Lee Bieber wrote:

>         If "Queue like functionality" means inserting at the end, and
>removing from the front... Just use a list

Someone said that time complexity should be part of an object public 
interfase. Implementing a queue using Python lists is trivial in 
terms of lines of code needed, but has a big time penalty. Queue 
users expect that put() and get() were fast, O(1) operations, but 
list.pop(0) is O(n).
Python>=2.4 has a deque class (in the collections module) that can be 
used as a simple queue, and is efficient both in time and memory used.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From steve at holdenweb.com  Wed Jan 24 08:35:08 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 24 Jan 2007 13:35:08 +0000
Subject: Thoughts on using isinstance
In-Reply-To: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
Message-ID: <45B7608C.4000007@holdenweb.com>

abcd wrote:
> In my code I am debating whether or not to validate the types of data
> being passed to my functions.  For example
> 
> def sayHello(self, name):
>     if not name:
>         rasie "name can't be null"
>     if not isinstance(name, str):
>         raise "name must be a string"
>     print "Hello " + name
> 
> Is the use of isinstance a "bad" way of doing things?  is it a "heavy"
> operation?  for example, if I use this in each function validate input
> will it slow things down a lot?
> 
> just curious how you might handle this type of situation (other than
> not validating at all).
> 
> thanks
> 
The "Python way" is to validate by performing the operations you need to 
perform and catching any exceptions that result. In the case of your 
example, you seem to be saying that you'd rather raise your own 
exception (which, by the way, should really be a subclass of Exception, 
but we will overlook that) that relying on the interpreter to raise a 
ValueError or a TypeError. Is there really any advantage to this? You 
increase your code size and add *something* to execution time with 
little real purpose.

People coming to Python after C++ or some similar language that allows 
or requires parameter type declarations often don't feel comfortable 
taking this direction to start with, but  it works well for most of us.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com


From could.net at gmail.com  Sun Jan  7 04:27:57 2007
From: could.net at gmail.com (Frank Potter)
Date: 7 Jan 2007 01:27:57 -0800
Subject: where is python on linux?
In-Reply-To: <enqe2h$f3k$03$1@news.t-online.com>
References: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
	<enqe2h$f3k$03$1@news.t-online.com>
Message-ID: <1168162077.707526.281650@38g2000cwa.googlegroups.com>

Thank you!
"which python" works for me.
I got it.
Peter Otten wrote:
> Frank Potter wrote:
>
> > I installed fedora core 6 and it has python installed.
> > But the question is, where is the executable python file?
> 
> Find out yourself with
> 
> $ which python
> 
> Peter



From parallelpython at gmail.com  Mon Jan  8 22:12:42 2007
From: parallelpython at gmail.com (Parallel Python The team)
Date: Tue, 9 Jan 2007 03:12:42 +0000
Subject: Parallel Python
In-Reply-To: <45A2109D.5050501@designaproduct.biz>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<45A2109D.5050501@designaproduct.biz>
Message-ID: <8c1dbbd40701081912s897fafen8bf7b4f976c8b9d1@mail.gmail.com>

On 1/8/07, Laszlo Nagy <gandalf at designaproduct.biz> wrote:
>
> I always thought that if you use multiple processes (e.g. os.fork) then
> Python can take advantage of multiple processors. I think the GIL locks
> one processor only. The problem is that one interpreted can be run on
> one processor only. Am I not right? Is your ppm module runs the same
> interpreter on multiple processors? That would be very interesting, and
> something new.
>
>
> Or does it start multiple interpreters? Another way to do this is to
> start multiple processes and let them communicate through IPC or a local
> network.
>
>
>   Laszlo
>
> You are right. ppsmp start multiple interpreters in separate processes and
organize communication between them through IPC.

So far ppsmp features load balancing (distributes workload evenly between
worker processes.) and low overhead (example
http://www.parallelpython.com/content/view/17/31/#REVERSE_MD5 submits a 100
jobs to the system with no noticeable overhead).
Of coerce there is always room for growth and I am considering adding new
features/functionality.
Do you have any functionality in mind which you want to see in this system?

Best regards,
Vitalii
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070109/42808eb7/attachment.html>

From sjmachin at lexicon.net  Mon Jan  1 02:57:33 2007
From: sjmachin at lexicon.net (John Machin)
Date: 31 Dec 2006 23:57:33 -0800
Subject: A question about unicode() function
In-Reply-To: <1167635228.725060.39110@42g2000cwt.googlegroups.com>
References: <1167571210.084436.311610@48g2000cwx.googlegroups.com>
	<mailman.2173.1167571846.32031.python-list@python.org>
	<1167635228.725060.39110@42g2000cwt.googlegroups.com>
Message-ID: <1167638253.544596.130630@v33g2000cwv.googlegroups.com>

JTree wrote:
> Hi,
>
> I changed my codes to:
>
> #!/usr/bin/python
> #Filename: test.py
> #Modified: 2007-01-01
>
> import cPickle as p
> import urllib
> import htmllib
> import re
> import sys
>
> funUrlFetch =  lambda url:urllib.urlopen(url).read()
>
> objUrl = raw_input('Enter the Url:')
> content = funUrlFetch(objUrl)
> content = content.encode('gb2312','ignore')

Why did you change what you had before? "content" is a str, encoded in
gb2312 (according to the internal evidence).  You are now pretending
that it is unicode, and trying to encode it as gb2312. However because
it is *not* unicode, Python tries to convert it to unicode first. What
you have coded above is equivalent to:
    content = content.decode('ascii').encode('gb2312', 'ignore')

and of course the *decode* fails, as the error message says:
Unicode*Decode*Error: 'ascii' codec can't decode byte 0xbb in position
88: ordinal not in range(128)

It never got any where near the encode()

So:
If you want a str encoded in gb2312, leave it alone.
If you want it in unicode, do this:
    ucontent = unicode(content, 'gb2312')

> print content

Try print repr(content)
It's much better for diagnostic purposes.


> content.close()

This will be your next problem; "content" refers to a str object or a
unicode object -- they don't have a close() method !!

>
> I used "ignore" to deal with the data lose, but it still caused a
> error:

What data loss???

>
> C:\WINDOWS\system32\cmd.exe /c python tianya.py
> Enter the Url:http://www.tianya.cn
> Traceback (most recent call last):
>   File "tianya.py", line 17, in ?
>     content = content.encode('gb2312','ignore')
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xbb in position
> 88: ordinal not in range(128)
> shell returned 1
> Hit any key to close this window...
>
> My python version is 2.4, Does it have some problems with asian
> encoding support?

"asian" is irrelevant. You would have got the same problem with just
about any non-ascii encoding, including cp1252 and similar encodings
commonly used in English-speaking countries and in western Europe. The
only encoding support problem with 2.4 is that it can't read your mind.


By the way, you should upgrade to 2.5, it can't read your mind either,
but it has more functionality etc :-)

HTH,
John



From jeremy+complangpython at jeremysanders.net  Tue Jan 23 06:54:26 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Tue, 23 Jan 2007 11:54:26 +0000
Subject: PyQt4 strangeness
References: <mLSdnfIBYsFkfijYRVnzvQ@telenor.com>
Message-ID: <ep4t1i$c0l$1@gemini.csx.cam.ac.uk>

Tina I wrote:

> 
> self.connect(self.ui.testButton, QtCore.SIGNAL("clicked()"),
> self.doSomething)
> 
> Anyone know why this is? Or am I missing something very basic here? (I'm
> still very much a noob I guess)

If you want to import both you can do something like:

import PyQt4.Qt as Qt

which imports QtCore and QtGui

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From bj_666 at gmx.net  Mon Jan 22 03:34:13 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 22 Jan 2007 09:34:13 +0100
Subject: Code reformater?
References: <poe3r2ha92p6vrhtk9b2piso337djv4boo@4ax.com>
	<eotjsg$ff68$1@zam602.zam.kfa-juelich.de>
	<mailman.2956.1169347902.32031.python-list@python.org>
	<pan.2007.01.21.03.15.45.787139@REMOVE.THIS.cybersource.com.au>
	<urv7r2d98j2mpfcdqgmnber1ntes39mnks@4ax.com>
Message-ID: <pan.2007.01.22.08.34.12.716215@gmx.net>

In <urv7r2d98j2mpfcdqgmnber1ntes39mnks at 4ax.com>, Vincent Delporte wrote:

> On Sun, 21 Jan 2007 14:15:46 +1100, Steven D'Aprano
> <steve at REMOVE.THIS.cybersource.com.au> wrote:
>>Still, it is better not to lose the indentation in the first place.
> 
> Thanks for the tips. But it does happen when copy/pasting code from
> either a web page or an e-mail that TABs are messed up, which is not a
> problem with other languages, but is a problem with Python. Too bad.

Well then don't use code from people using TABs.  If it's indented by four
spaces per level, like suggested by the style guide, there's no problem
with TABs.

Ciao,
	Marc 'BlackJack' Rintsch



From steven.bethard at gmail.com  Wed Jan 31 11:25:04 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 31 Jan 2007 09:25:04 -0700
Subject: Conditional expressions - PEP 308
In-Reply-To: <mailman.3325.1170193923.32031.python-list@python.org>
References: <mailman.3325.1170193923.32031.python-list@python.org>
Message-ID: <i-udnW5F-sFEX13YnZ2dnUVZ_rbinZ2d@comcast.com>

Colin J. Williams wrote:
> It would be helpful if the rules of the game were spelled out more clearly.
> 
> The conditional expression is defined as X if C else Y.
> We don't know the precedence of the "if" operator.  From the little test 
> below, it seem to have a lower precedence than "or".
> 
> Thus, it is desirable for the user to put the conditional expression in 
> parentheses.

Could you submit a documentation patch?

      http://sourceforge.net/tracker/?group_id=5470&atid=105470

It doesn't need to be in LaTeX.  Plain text is fine.  Just indicate in 
what document you think text should be added.

STeVe


From http  Mon Jan 29 00:52:37 2007
From: http (Paul Rubin)
Date: 28 Jan 2007 21:52:37 -0800
Subject: Random passwords generation (Python vs Perl) =)
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
Message-ID: <7x3b5uwfa2.fsf@ruckus.brouhaha.com>

"NoName" <zaz600 at gmail.com> writes:
> from random import choice
> import string
> print ''.join([choice(string.letters+string.digits) for i in 
> range(1,8)])
> 
> !!generate password once :(
> 
> who can write this smaller or without 'import'?

If you don't mind possibly getting a few nonalphanumeric characters:

import os,binascii
print binascii.b2a_base64(os.urandom(6))


From maxerickson at gmail.com  Mon Jan  8 14:05:06 2007
From: maxerickson at gmail.com (Max Erickson)
Date: Mon, 8 Jan 2007 19:05:06 +0000 (UTC)
Subject: recursive function
References: <1168265240.294223.298750@s80g2000cwa.googlegroups.com>
Message-ID: <Xns98B28F3A3F0F1maxericksongmailcom@80.91.229.5>

"cesco" <fd.calabrese at gmail.com> wrote:

> Hi,
> 
> I have a dictionary of lists of tuples like in the following
> example: dict = {1: [(3, 4), (5, 8)],
>         2: [(5, 4), (21, 3), (19, 2)],
>         3: [(16, 1), (0, 2), (1, 2), (3, 4)]]
> 
> In this case I have three lists inside the dict but this number
> is known only at runtime. I have to write a function that
> considers all the possible combinations of tuples belonging to
> the different lists and return a list of tuples of tuples for
> which the sum of the first element of the most inner tuple is
> equal to N. 
> 
> For example, assuming N = 24, in this case it should return:
> [((3, 4), (5, 4), (16, 1)), ((3, 4), (21, 3), (0, 2)), ((5, 8),
> (19, 2), (0, 2))]
> 
> A simple list comprehension would be enough if only I knew the
> number of keys/lists beforehand but this is not the case. I guess
> I need a recursive function. Can anyone help?
> 
> Thanks in advance
> Francesco
> 

This thread is probably of interest:

http://groups.google.com/group/comp.lang.python/browse_frm/thread/f0c0
406fce981a54/59a2a5dcd1507ab9#59a2a5dcd1507ab9


max



From rdiaz02 at gmail.com  Sat Jan 20 16:37:24 2007
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Sat, 20 Jan 2007 22:37:24 +0100
Subject: Py 2.5 on Language Shootout
In-Reply-To: <1169321686.025356.120340@s34g2000cwa.googlegroups.com>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>
	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>
	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>
	<1169275613.093797.67320@v45g2000cwv.googlegroups.com>
	<45B23400.2010906@gmx.de>
	<mailman.2944.1169309208.32031.python-list@python.org>
	<1169321686.025356.120340@s34g2000cwa.googlegroups.com>
Message-ID: <624934630701201337w10f72ce4j9903419e10befe3@mail.gmail.com>

On 20 Jan 2007 11:34:46 -0800, Isaac Gouy <igouy at yahoo.com> wrote:
>
> Ramon Diaz-Uriarte wrote:
> > On 1/20/07, Carl Friedrich Bolz <cfbolz at gmx.de> wrote:
> > > pgarrone at acay.com.au wrote:
> > >  >>> Looking over the benchmarks, one gains the impression that Python is a
> > >  >>> slow language.
> > >  >> What does that even mean - a slow language?
> > >  >>
> > >  >
> > >  > The alioth benchmarks provide a set of numbers by which
> > >  > languages may be compared.
> > >
> > > Wrong. The benchmarks provide a set of numbers by which
> > > _implementations_ of languages can be compared. After all, it is
> > > possible that someone implements a magic-pixie-dust-interpreter that
> > > executes Python programs several orders of magnitude fastes than
> > > CPython. Or you could say that C is slow because if you use CINT, a C
> > > interpreter ( http://root.cern.ch/root/Cint.html ) to execute it, it is
> > > slow.
> >
> >
> > Yeah, but this is hair-splitting. Except for Jython, IronPython, and
> > Stackless, I think when we say "Python is slow/fast" we think CPython
> > (otherwise, we qualify the implementation). For that matter it is
> > often said "the GIL ..."; oh, but wait, Stackless ...
>
> When we say "Python is slow/fast" what does "slow/fast" mean?
>

Oh, well, I have no idea. I guess you'd have to define what "speed"
and, if that is a single number, then we can just rank languages. We'd
probably never agree on how to obtain a single number. But I think
most of us, when looking at the shootout, can see that there are some
languages that, for most of the programs, are consistently faster than
the rest, and others that are consistently slower. But really, I think
the shootout page has large, detailed and <b></b> statements about the
perils and pitfalls of measuring these things. (And I do not go to the
shootout to hear the oracle tell me which language I should use in my
next project).



>
> >
> > With other languages (e.g., Common Lisp) the separation between the
> > language and the implementation is key because, to begin with, there
> > is something external from, and independent of, any particular
> > implementation. That is not the case with Python.
> >
> > And the example of CINT is hair-splitting to the nth power.To begin
> > with, I do not think CINT implements the full standard C. But even if
> > it were, when people think of C they rarely think of CINT.
>
> And that's why the existence of CINT is such a stark reminder of the
> separation between the language and the implementation. When people
> think of C what do they think of - gcc? tiny-c? intel c? microsoft c?
> some mythical C implementation?
>
>

Really, this ain't my war. Sure, there are two things: the language
and the implementation. But, for practical purposes, when most people
today say Python they mean CPython, whereas if the say Scheme, they
certainly need to say _which_ Scheme (I think only PLT is in the
official shootout page; there are others in the beta tests). If people
want to mean Jython or Stackless, they just say that. As for C, I
think people will need to qualify what exactly they mean.

I think all these issues do not really lead to confusion for most of
us; certainly not if you go to the shootout page. But as I said, this
ain't my war. I was simply pointing out that correcting one poster for
talking about languages when referring to python was hair splitting.

And I think we are all running in circles, because I guess we all
agree. This is turning into what in Spain (a country of catholic
tradition) we call a discussion about "the sex of the angels" (el sexo
de los angeles), i.e., whether angels are male or female or something
else. Since sexing angels is not my area of expertise, I'll just shut
up (I actually don't really know why I even said anything about this
issue; please, forgive my chatiness).

Best,

R.


> >
> > I think readers understood the previous poster.
> >
> > Best,
> >
> > R.
> > >
> > > Cheers,
> > >
> > > Carl Friedrich Bolz
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > >
> >
> >
> > --
> > Ramon Diaz-Uriarte
> > Statistical Computing Team
> > Structural Biology and Biocomputing Programme
> > Spanish National Cancer Centre (CNIO)
> > http://ligarto.org/rdiaz
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Ramon Diaz-Uriarte
Statistical Computing Team
Structural Biology and Biocomputing Programme
Spanish National Cancer Centre (CNIO)
http://ligarto.org/rdiaz


From http  Tue Jan 23 04:42:45 2007
From: http (Paul Rubin)
Date: 23 Jan 2007 01:42:45 -0800
Subject: AES and Credit card number encryption
References: <45b5159e$0$24377$88260bb3@free.teranews.com>
	<7xy7nu4ubj.fsf@ruckus.brouhaha.com>
	<45b55d8b$0$24450$88260bb3@free.teranews.com>
Message-ID: <7xac0aoz8q.fsf@ruckus.brouhaha.com>

Tobiah <toby at tobiah.org> writes:
> Looking at the problem further, I am getting the idea that
> PGP, or GPG (Asymetric encryption) would be better, because
> then all of the software that has to *write* CC numbers, would
> not have to access the 'secret' key.

Yes.

> PGP sounds great, but it seems like a huge subject to cover
> in a day or two.  Is there a nice module for python that would
> let me do the most usual operations easily?  I just want to make
> a key, hide it, and the use the public key to encrypt all future
> and past credit card numbers.

I think I did hear of a GPG module.  You can also call GPG as an
external library.  There are also modules around that do public-key
operations directly, or some like M2Crypto that use OpenSSL for public
key operations.

I wrote something a while back for applications pretty similar to
yours, but never released it.  I should clean it up sometime.  At the
moment I wouldn't consider it well-tested enough for deployment in
real applications, and also it currently doesn't support AES because
it was written to avoid using C extensions, so it used a nonstandard
pure-Python cipher.

  http://www.nightsong.com/phr/crypto/crypto.txt

If you want to just encrypt stuff in pure Python and you don't mind
using a nonstandard (but reasonably secure, at least compared with the
old rotor module it was written to replace), it's here:

  http://www.nightsong.com/phr/crypto/p3.py

Note that you get a ciphertext considerably longer than the plaintext.
This is unavoidable for various security reasons and a proper AES
setup (or a call to GPG) will be the same way.


From steven.bethard at gmail.com  Sat Jan 27 22:00:48 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 27 Jan 2007 20:00:48 -0700
Subject: distutils, sdist and tests
In-Reply-To: <mailman.3235.1169934632.32031.python-list@python.org>
References: <Jaudna0fMYmIBCbYnZ2dnUVZ_sKunZ2d@comcast.com>
	<mailman.3235.1169934632.32031.python-list@python.org>
Message-ID: <udOdnWW5l4N-jCHYnZ2dnUVZ_v-tnZ2d@comcast.com>

Robert Kern wrote:
> Steven Bethard wrote:
>> How do I get distutils to include my testing module in just the "sdist" 
>> distribution?
> 
> Use a MANIFEST.
> 
>   http://docs.python.org/dist/source-dist.html
> 
>> I want test_argparse.py to be available in the source distribution, but 
>> I don't think it should be included in the binary distributions.

Using a MANIFEST appears to do the same thing as putting "test_argparse" 
into py_modules -- that is, it puts "test_argparse.py" into both "sdist" 
and "bdist" distributions. In "bdist" distributions it gets installed to 
the site-packages directory like any other module.

STeVe


From http  Wed Jan 24 20:18:20 2007
From: http (Paul Rubin)
Date: 24 Jan 2007 17:18:20 -0800
Subject: The reliability of python threads
References: <mailman.3092.1169657938.32031.python-list@python.org>
	<ep841j$anu$1@gemini.csx.cam.ac.uk>
	<mailman.3095.1169659417.32031.python-list@python.org>
	<ep883i$iom$1@gemini.csx.cam.ac.uk>
	<4866bea60701241036g374bb401m6abbc1978ff6701c@mail.gmail.com>
	<mailman.3105.1169664198.32031.python-list@python.org>
	<1169683654.672020.136820@q2g2000cwa.googlegroups.com>
	<7xveiwklt0.fsf@ruckus.brouhaha.com>
	<1169687269.885833.285410@a34g2000cwb.googlegroups.com>
Message-ID: <7x8xfr6h0j.fsf@ruckus.brouhaha.com>

"Klaas" <mike.klaas at gmail.com> writes:
> CPython is more that "a particular implementation" of python,

It's precisely a particular implementation of Python.  Other
implementations include Jython, PyPy, and IronPython.

>  and the GIL is more than an "artifact".  It is a central tenet of
> threaded python programming.

If it's a central tenet of threaded python programming, why is it not
mentioned at all in the language or library manual?  The threading
module documentation describes the right way to handle thread
synchronization in Python, and that module implements traditional
locking approaches without reference to the GIL.

> I don't advocate relying on the GIL to manage shared data when
> threading, but 1) it is useful for the reasons I mention 2) the OP's
> question was almost certainly about an application written for  and run
> on CPython.

Possibly true.


From steve at REMOVE.THIS.cybersource.com.au  Sat Jan 27 01:00:36 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 27 Jan 2007 17:00:36 +1100
Subject: strip question
References: <1169876027.003477.161350@a75g2000cwd.googlegroups.com>
Message-ID: <pan.2007.01.27.06.00.35.604063@REMOVE.THIS.cybersource.com.au>

On Fri, 26 Jan 2007 21:33:47 -0800, eight02645999 wrote:

> hi
> can someone explain strip() for these :
> [code]
>>>> x='www.example.com'
>>>> x.strip('cmowz.')
> 'example'
> [/code]
> 
> when i did this:
> [code]
>>>> x = 'abcd,words.words'
>>>> x.strip(',.')
> 'abcd,words.words'
> [/code]
> 
> it does not strip off "," and "." .Why is this so?
> thanks


Fascinating...

It gets weirder:

>>> x.strip('s')
'abcd,words.word'

Why strip only the final s, not the earlier one?

>>> x.strip('w')
'abcd,words.words'
>>> x.strip('o')
'abcd,words.words'
>>> x.strip('r')
'abcd,words.words'

Strips nothing.

>>> x.strip('ba')
'cd,words.words'

Strips correctly.

>>> x.strip('bwa')
'cd,words.words'

Strips the a and b but not the w.

>>> x.strip('bwas')
'cd,words.word'

...and only one of the S's.

>>> y = "bwas"
>>> y.strip('bwas')
''
>>> y = "bwasxyz"
>>> y.strip('bwas')
'xyz'

And yet these work.


You know, I'm starting to think there may be a bug in the strip method...
either that or the documentation should say:

strip(...)
    S.strip([chars]) -> string or unicode

    Return a copy of the string S with leading and trailing
    whitespace removed.
    If chars is given and not None, remove none, some or all characters in
    chars instead. If chars is unicode, S will be converted to unicode
    before stripping


*wink*


-- 
Steven.



From mahs at telcopartners.com  Mon Jan 29 18:27:07 2007
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 29 Jan 2007 15:27:07 -0800
Subject: Overloading assignment operator
In-Reply-To: <epls3j$vlf$1@aioe.org>
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>	<1169604475.177104.40330@s48g2000cws.googlegroups.com>	<pan.2007.01.24.05.34.12.348925@REMOVEME.cybersource.com.au>
	<epls3j$vlf$1@aioe.org>
Message-ID: <eplvse$s0s$1@sea.gmane.org>

J. Clifford Dyer wrote:
  > I think that's the first time I've actually seen someone use a Monty
> Python theme for a python example, and I must say, I like it.  However,
> "We are all out of Wensleydale."
> 
> Cheers,
> Cliff

Oh, then you clearly don't waste nearly enough time on this newsgroup ;-)

http://groups.google.com/group/comp.lang.python/search?group=comp.lang.python&q=spam+eggs

http://groups.google.com/group/comp.lang.python/search?q=shrubbery

http://groups.google.com/group/comp.lang.python/search?group=comp.lang.python&q=knights+ni

http://groups.google.com/group/comp.lang.python/search?group=comp.lang.python&q=larch

Idly yours,

Michael



From NikitaTheSpider at gmail.com  Sat Jan 20 15:38:41 2007
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Sat, 20 Jan 2007 15:38:41 -0500
Subject: urllib2 and transfer-encoding = chunked
References: <1169108468.497013.228520@l53g2000cwa.googlegroups.com>
	<mailman.2868.1169131800.32031.python-list@python.org>
	<1169137502.990783.222150@51g2000cwl.googlegroups.com>
Message-ID: <NikitaTheSpider-E750B8.15384120012007@news-server.nc.rr.com>

In article <1169137502.990783.222150 at 51g2000cwl.googlegroups.com>,
 jdvolz at gmail.com wrote:

> Haha!  My mistake.
> 
> The error is that when a web server is chunking a web page only the
> first chunk appears to be acquired by the urllib2.urlopen call.  If you
> check the headers, there is no 'Content-length' (as expected) and
> instead there is 'transfer-encoding' = 'chunked'.  I am getting about
> the first 30Kb, and then nothing else.
> 
> I don't get a ValueError like described at the following post:

Hi jdvolz,
What error *do* you get? Or is it that no error is raised; you're just 
not getting all of the data? If it is the latter, then the sending 
server might be at fault for not properly following the chunked transfer 
protocol. One way to find out would be to fire up Ethereal and see 
what's coming down the wire. 

> I am having errors which appear to be linked to a previous bug in
> urllib2 (and urllib) for v2.4 and v2.5 of Python.  Has this been fixed?
>  Has anyone established a standard workaround?  I keep finding old
> posts about it, that basically give up and say "well it's a known bug."

Can you give us some pointers to some of these old posts? And tell us 
what version of Python you're using.

-- 
Philip
http://NikitaTheSpider.com/
Whole-site HTML validation, link checking and more


From timr at probo.com  Fri Jan 19 03:35:59 2007
From: timr at probo.com (Tim Roberts)
Date: Fri, 19 Jan 2007 08:35:59 GMT
Subject: Units of measurement
References: <7x8xg1xr62.fsf_-_@ruckus.brouhaha.com>
Message-ID: <8g01r2p6g6o1mujhicg2a6kuh32a2e7gdc@4ax.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:
>
>I'm sure this has been done before, but it just struck my fancy, an
>example of Python's "emulating numeric types", inspired by the old
>Unix "units" utility, and the Frink language.  
>...
># could include more units but you get the idea
>...
>c = 186282*mile/second
>print 'speed of light =', c/(furlong/fortnight), 'furlongs per fortnight'
># ...

I could not skip to the next message without cutting, pasting, and
executing that script to find out what the speed of light actually was in
furlongs per fortnight.

Now I need to figure out how to work that into a cocktail party
conversation.  "Hey, the deficit isn't the only thing that is approaching
1.8 trillion..."
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From hayes.tyler at gmail.com  Sun Jan 21 17:09:01 2007
From: hayes.tyler at gmail.com (Tyler)
Date: 21 Jan 2007 14:09:01 -0800
Subject: Reading Fortran Data
Message-ID: <1169417341.339194.59560@q2g2000cwa.googlegroups.com>

Hello All:

After trying to find an open source alternative to Matlab (or IDL), I
am currently getting acquainted with Python and, in particular SciPy,
NumPy, and Matplotlib. While I await the delivery of Travis Oliphant's
NumPy manual, I have a quick question (hopefully) regarding how to read
in Fortran written data.

The data files are not binary, but ASCII text files with no formatting
and mixed data types (strings, integers, floats). For example, I have
the following write statements in my Fortran code:

I write the files as such:
  WRITE(90,'(A30)') fgeo_name
  WRITE(90,'(A30)') fmed_name
  WRITE(90,*) nfault,npoint
  WRITE(90,*) (xpt(n), n=1,npoint)
  WRITE(90,*) (ypt(n), n=1,npoint)

and,

  WRITE(10,'(A30)') fname
  DO i=1,nfault
     WRITE(10,*) dbn(i),dtn(i),xfwnt(i),yfwnt(i),xfent(i),yfent(i),&
          &        slpvlS(i),slpvlD(i),slpvlT(i),segdp1(i)
  END DO


I then respectively read them into Fortran as:
  READ(70,'(A30)') fgeo_name
  READ(70,'(A30)') fmed_name
  READ(70,*) nfault,npoint
  READ(70,*) (x(n), n=1,npoint)
  READ(70,*) (y(n), n=1,npoint)

and,

  READ(20,'(A30)') fname
  DO i=1,nfault
     READ(20,*) dbn(i),dtn(i),xfwnt(i),yfwnt(i),xfent(i),yfent(i),&
          &        slpvlS(i),slpvlD(i),slpvlT(i),segdp1(i)
  END DO

I also read them into IDL for visualization using the "READF" command.
I was wondering how I might go about reading this into Python using
NumPy. If this is not trivial, let me know and I'll just wait until the
NumPy manual arrives.

Cheers,

t.



From danb_83 at yahoo.com  Tue Jan  2 21:30:04 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 2 Jan 2007 18:30:04 -0800
Subject: Iterate through list two items at a time
In-Reply-To: <enf2he$2sr1@cnn.xsj.xilinx.com>
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
Message-ID: <1167791404.814286.80570@n51g2000cwc.googlegroups.com>

On Jan 2, 7:57 pm, "Dave Dean" <dave.d... at xilinx.com> wrote:
> Hi all,
>   I'm looking for a way to iterate through a list, two (or more) items at a
> time.  Basically...
>
>   myList = [1,2,3,4,5,6]
>
> I'd like to be able to pull out two items at a time...

def pair_list(list_):
    return [list_[i:i+2] for i in xrange(0, len(list_), 2)]



From facundo at taniquetil.com.ar  Fri Jan 12 11:11:40 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Fri, 12 Jan 2007 16:11:40 +0000 (UTC)
Subject: Rational Numbers
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<eo65qk$bsr$1@sea.gmane.org>
	<cb63d1e10701111420l28d0f0d0s35217370d86067b@mail.gmail.com>
Message-ID: <eo8bvr$bhs$1@sea.gmane.org>

Noud Aldenhoven wrote:

> There are a (small) couple of other issues where rational numbers could be
> handy. That's because rational numbers are exact, irrational numbers (in
> python) aren't. But these issues are probably too mathematical to be used in

For the sake of me being less ignorant, could you please point me a
language where irrational numbers are exact?

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From rw at smsnet.pl  Fri Jan 12 17:07:19 2007
From: rw at smsnet.pl (Rob Wolfe)
Date: Fri, 12 Jan 2007 23:07:19 +0100
Subject: module file
References: <45a7ba78$0$316$426a74cc@news.free.fr>
Message-ID: <87hcuv527c.fsf@smsnet.pl>

Imbaud Pierre <pierre.imbaud at laposte.net> writes:

> I am willing to retrieve the file an imported module came from;
> module.__file__, or inspect.getfile(module) only gives me the
> relative file name. How do I determine the path?

>>> import os
>>> os.path.abspath(module.__file__)

-- 
HTH,
Rob


From grflanagan at yahoo.co.uk  Wed Jan  3 01:32:36 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 2 Jan 2007 22:32:36 -0800
Subject: Iterate through list two items at a time
In-Reply-To: <enf2he$2sr1@cnn.xsj.xilinx.com>
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
Message-ID: <1167805956.358933.191000@i12g2000cwa.googlegroups.com>


Dave Dean wrote:

> Hi all,
>   I'm looking for a way to iterate through a list, two (or more) items at a
> time.  Basically...
>
>   myList = [1,2,3,4,5,6]
>
> I'd like to be able to pull out two items at a time - simple examples would
> be:
> Create this output:
> 1 2
> 3 4
> 5 6
>
> Create this list:
> [(1,2), (3,4), (5,6)]
>

A "padding generator" version:

def chunk( seq, size, pad=None ):
    '''
    Slice a list into consecutive disjoint 'chunks' of
    length equal to size. The last chunk is padded if necessary.

    >>> list(chunk(range(1,10),3))
    [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
    >>> list(chunk(range(1,9),3))
    [[1, 2, 3], [4, 5, 6], [7, 8, None]]
    >>> list(chunk(range(1,8),3))
    [[1, 2, 3], [4, 5, 6], [7, None, None]]
    >>> list(chunk(range(1,10),1))
    [[1], [2], [3], [4], [5], [6], [7], [8], [9]]
    >>> list(chunk(range(1,10),9))
    [[1, 2, 3, 4, 5, 6, 7, 8, 9]]
    >>> for X in chunk([],3): print X
    >>>
    '''
    n = len(seq)
    mod = n % size
    for i in xrange(0, n-mod, size):
        yield seq[i:i+size]
    if mod:
        padding = [pad] * (size-mod)
        yield seq[-mod:] + padding

------------------------------------------------------------------

Gerard



From syedamjad_a at yahoo.com  Fri Jan 12 12:16:51 2007
From: syedamjad_a at yahoo.com (CSUIDL PROGRAMMEr)
Date: 12 Jan 2007 09:16:51 -0800
Subject: parsing a file name
Message-ID: <1168622211.188972.179680@38g2000cwa.googlegroups.com>

I have a filename
cairo-2.3.4.src.rpm
Is there any way i can only get 2.3.4 from this file name
thanks



From hg at nospam.org  Mon Jan 15 11:40:31 2007
From: hg at nospam.org (hg)
Date: Mon, 15 Jan 2007 17:40:31 +0100
Subject: download win32file
References: <mailman.2742.1168900097.32031.python-list@python.org>
	<_mTqh.49191$kn7.39312@newsfe23.lga>
	<mailman.2747.1168901974.32031.python-list@python.org>
Message-ID: <NhUqh.12$lc5.3@newsfe20.lga>

jim-on-linux wrote:

> On Monday 15 January 2007 10:37, hg wrote:
>> jim-on-linux wrote:
>> > Where can I download win32file / win32ui?
>> >
>> > The links below are broken.  Mark Hammond
>> > should be made aware of this.
>> >
>> >
>> > URL below has two links that send you no
>> > place
>> > http://mail.python.org/pipermail/python-list/
>> >2002-October/167638.html
>> >
>> >
>> > Links:
>> > http://starship.python.net/crew/mhammond/win3
>> >2/Downloads.html
>> >
>> > http://starship.python.net/crew/mhammond/down
>> >loads/win32all-148.exe
>> >
>> >
>> > Produce;
>> >
>> >  The requested URL was not found on this
>> > server. The link on the referring page seems
>> > to be wrong or outdated. Please inform the
>> > author of that page about the error.
>> >
>> > jim-on-linux
>>
>> Do you mean PyWin32 ?
> 
> ?? Do I have to download pywin32 to get win32ui,
> or win32file, or win32api
> 
>>
>> http://sourceforge.net/projects/pywin32/

To my knowledge, yes.

hg



From ndbecker2 at gmail.com  Thu Jan 25 06:41:12 2007
From: ndbecker2 at gmail.com (Neal Becker)
Date: Thu, 25 Jan 2007 06:41:12 -0500
Subject: MIME text attachment question
Message-ID: <epa50o$se6$1@sea.gmane.org>

I want to send a file (plain text) as an attachment.

I'm using MIMEText.  This attaches text OK, but I would like to have a
filename attached to it, so that the recipient could save it without having
to specify a filename.

Any suggestions?



From carsten at uniqsys.com  Fri Jan 12 10:36:38 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 12 Jan 2007 10:36:38 -0500
Subject: Rational Numbers
In-Reply-To: <eo883j$l9d$1@gemini.csx.cam.ac.uk>
References: <cb63d1e10701111135g528837b1wce8b2ff43452ba85@mail.gmail.com>
	<mailman.2597.1168550439.32031.python-list@python.org>
	<eo6ia5$5bt$1@gemini.csx.cam.ac.uk>
	<mailman.2643.1168611301.32031.python-list@python.org>
	<eo883j$l9d$1@gemini.csx.cam.ac.uk>
Message-ID: <1168616198.3382.55.camel@dot.uniqsys.com>

On Fri, 2007-01-12 at 15:05 +0000, Nick Maclaren wrote:
> In article <mailman.2643.1168611301.32031.python-list at python.org>,
> Carsten Haese <carsten at uniqsys.com> writes:
> |> On Thu, 2007-01-11 at 23:47 +0000, Nick Maclaren wrote:
> |> > In article <mailman.2597.1168550439.32031.python-list at python.org>,
> |> > Facundo Batista <facundo at taniquetil.com.ar> writes:
> |> > |> Python does not have rational numbers.
> |> > |> 
> |> > |> There's a (rejected) PEP about this, PEP-239:
> |> > |> 
> |> > |>   http://www.python.org/dev/peps/pep-0239/
> |> > |> 
> |> > |> Maybe you also want to read the section "Why not rational?" of
> |> > |> PEP-327...
> |> > |> 
> |> > |>   http://www.python.org/dev/peps/pep-0327/#why-not-rational
> |> > 
> |> > Oh, God.  Decimal delusions again :-(
> |> > 
> |> > There are good arguments for not having a rational type, but the idea
> |> > that decimal floating-point is in any way a replacement is cuckoo.
> |> 
> |> You're putting words in Facundo's mouth. Facundo didn't say why we
> |> should read that section of PEP 327. I think he merely pointed to the
> |> slow performance of rational numbers that's explained in that section.
> |> (Facundo is the author of PEP 327, so I find it unlikely that he has
> |> delusions about what decimals can and can't do.)
> 
> You're putting words in MY mouth!  I didn't say that he did.  But I
> agree that my words could easily be read that way, so I apologise for
> any misunderstanding.
> [...]
> The BDFL Pronouncement rejecting PEP 239 does, even if it does qualify
> it by saying "to some extent".  And it was that PEP that I was primarily
> referring to in that remark.

Ah, so now you're putting words in the BDFL's mouth. ;)

The pronouncement does say "The needs outlined in the rationale section
have been addressed to some extent by the acceptance of PEP 327 for
decimal arithmetic," but it doesn't say to which extent, and it
certainly doesn't claim that decimal arithmetic is a replacement for
rational arithmetic.

> The "Why not rational?" section of PEP 327 quotes Alex Martelli as saying
> that Rational are not worth doing without Decimal, which makes no sense
> at all.  All it does is to plug Decimal for a purpose for which it is
> completely unsuited; not all rational numbers have denumerators that are
> powers of 10.

The sentence you're referring to is "There are excellent Rational
implementations [...]. Probably worth PEPping, not worth doing without
Decimal." I agree that this sentence is poorly worded, but I think it
means "Even if we had Rational, we'd still need Decimal" in the sense
that Rational is not an adequate replacement for Decimal.

The bottom line is that there are use cases for both Rational and
Decimal, and neither one can replace the other, but there are more use
cases for Decimal than for Rational.

-Carsten




From jstroud at mbi.ucla.edu  Tue Jan 30 07:30:07 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 30 Jan 2007 12:30:07 GMT
Subject: Help me understand this
In-Reply-To: <1170146755.446429.90720@v45g2000cwv.googlegroups.com>
References: <1170140737.027139.14920@h3g2000cwc.googlegroups.com>
	<pan.2007.01.30.07.47.33.15637@REMOVEME.cybersource.com.au>
	<1170146755.446429.90720@v45g2000cwv.googlegroups.com>
Message-ID: <jTGvh.39800$Gr2.6608@newssvr21.news.prodigy.net>

Beej wrote:
>>>> (2).__add__(1)

Nice. I would have never thought to put parentheses around an integer to 
get at its attributes.

James


From dejan.wirusrodiger at ck.t-com.hr  Mon Jan 22 15:28:51 2007
From: dejan.wirusrodiger at ck.t-com.hr (Dejan Rodiger)
Date: Mon, 22 Jan 2007 21:28:51 +0100
Subject: SQLObject 0.8.0b2
In-Reply-To: <1169496151.864232.65190@m58g2000cwm.googlegroups.com>
References: <mailman.2992.1169490156.32031.python-list@python.org>
	<1169496151.864232.65190@m58g2000cwm.googlegroups.com>
Message-ID: <ep36q9$nud$1@ss408.t-com.hr>

Robert Hicks said the following on 22.1.2007 21:02:
> Where is Oracle support?
> 

What about DB2 UDB and DB2/400 >:o

-- 
Dejan Rodiger - PGP ID 0xAC8722DC
Delete wirus from e-mail address


From steve at REMOVEME.cybersource.com.au  Mon Jan  8 03:15:55 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Mon, 08 Jan 2007 19:15:55 +1100
Subject: regex question
References: <1168232001.377605.236270@11g2000cwr.googlegroups.com>
	<45a1f0c6$0$18929$4c368faf@roadrunner.com>
	<1168243020.304940.212700@42g2000cwt.googlegroups.com>
Message-ID: <pan.2007.01.08.08.15.54.609742@REMOVEME.cybersource.com.au>

On Sun, 07 Jan 2007 23:57:00 -0800, proctor wrote:

> it does work now...however, one more question:  when i type:
> 
> rx_a = re.compile(r'a|b|c')
> it works correctly!
> 
> shouldn't:
> rx_a = re.compile(makeRE(test))
> give the same result since makeRE(test)) returns the string "r'a|b|c'"

Those two strings are NOT the same.

>>> s1 = r'a|b|c'
>>> s2 = "r'a|b|c'"
>>> print s1, len(s1)
a|b|c 5
>>> print s2, len(s2)
r'a|b|c' 8

A string with a leading r *outside* the quotation marks is a raw-string.
The r is not part of the string, but part of the delimiter.

A string with a leading r *inside* the quotation marks is just a string
with a leading r. It has no special meaning.



-- 
Steven D'Aprano 



From steve at holdenweb.com  Sun Jan 28 04:51:07 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 28 Jan 2007 09:51:07 +0000
Subject: Crunchy 0.8 release
In-Reply-To: <1169932766.450129.259840@k78g2000cwa.googlegroups.com>
References: <1169932766.450129.259840@k78g2000cwa.googlegroups.com>
Message-ID: <45BC720B.5010909@holdenweb.com>

Andr? wrote:
> Version 0.8 of Crunchy has been released.  It is available on
> http://code.google.com/p/crunchy/
> 
> Crunchy, the Interactive Python Tutorial Maker, is an application that
> transforms an ordinary html-based Python tutorial into an interactive
> session within a web browser.  Currently, only Firefox is supported.
> Crunchy is developed and tested on Windows XP and Ubuntu Dapper Drake,
> but should work on any suitable windows or UNIX system.
> 
> Three major improvements have been made since version 0.7 had been 
> released.
> 
> 1. New editor
> 
> Instead of a simple html textarea, Crunchy now gives the option of
> using a "real" editor, namely EditArea
> (http://www.cdolivet.net/editarea/).  EditArea support syntax coloring
> and allows loading and saving local Python files among other features.
>  Within Crunchy, it is set up so that the tab key is translated into 4
> spaces.
> 
> 2. Language support
> 
> Crunchy now supports English and French, through the use of ".po"
> files.  When running Python code, some error messages have been
> adapted/translated.  EditArea itself support more languages
> (currently: Danish, Dutch, English, French, German, Italian, Japanese,
> Polish, Portuguese).
> 
> 3. Graphical tutorial converter.
> 
> Crunchy uses some supplementary markup to transform html files into
> interactive tutorials.  Whereas previous versions required a tutorial
> maker to edit an html file "by hand", version 0.8 includes a tutorial
> editor: with a few clicks, you can easily add to an html file the
> chosen interactive elements and options for Crunchy.
> 
> In addition to the above major improvements, the code has been
> refactored significantly and a number of small bug fixes have been
> made.  Crunchy will be demonstrated at the upcoming Pycon 2007.
> 
> Andr? Roberge and Johannes Woolard.
> 
Very nice indeed, and a significant advance over 0.7 - I'll be trying to 
write Crunchy presentations myself (though possibly not as soon as PyCon).

I found it a little strange that the top-level directory in the 
distribution is called "andre" rather than "crunchy", but that's a very 
minor point.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From nick at craig-wood.com  Thu Jan  4 07:30:07 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 04 Jan 2007 06:30:07 -0600
Subject: code optimization (calc PI)
References: <hOPmh.82$9v1.124@nntpserver.swip.net>
Message-ID: <slrneppql6.3v8.nick@irishsea.home.craig-wood.com>

mm <michael at mustun.ch> wrote:
>  (Yes, I konw whats an object is...)
>  BTW. I did a translation of a pi callculation programm in C to Python. 
>  (Do it by your own... ;-)
>  Calc PI for 800 digs(?). (german: Stellen)
>  int a=10000,b,c=2800,d,e,f[2801],g;main(){for(;b-c;)f[b++]=a/5;
>       for(;d=0,g=c*2;c-=14,printf("%.4d",e+d/a),e=d%a)for(b=c;d+=f[b]*a,
>       f[b]=d%--g,d/=g--,--b;d*=b);}

Below you'll find my translation.  Note that I improved the algorithm
greatly.  Note the nice easy to read algorithm also!  This calculated
800 digits of pi in 0.1 seconds and 10,000 digits in 20 seconds.

------------------------------------------------------------
"""
Standalone Program to calculate PI using python only

Nick Craig-Wood <nick at craig-wood.com>
"""

import sys
from time import time

class FixedPoint(object):
    """A minimal immutable fixed point number class"""
    __slots__ = ['value']               # __weakref__
    digits = 25                         # default number of digits
    base = 10**digits

    def __init__(self, value=0):
        """Initialise the FixedPoint object from a numeric type"""
        try:
            self.value = long(value * self.base)
        except (TypeError, ValueError), e:
            raise TypeError("Can't convert %r into long", value)

    def set_digits(cls, digits):
        """Set the default number of digits for new FixedPoint numbers"""
        cls.digits = digits
        cls.base = 10**digits
    set_digits = classmethod(set_digits)

    def copy(self):
        "Copy self into a new object"
        new = FixedPoint.__new__(FixedPoint)
        new.value = self.value
        return new
    __copy__ = __deepcopy__ = copy

    def __add__(self, other):
        """Add self to other returning the result in a new object"""
        new = self.copy()
        new.value = self.value + other.value
        return new
    __radd__ = __add__

    def __sub__(self, other):
        """Subtract self from other returning the result in a new object"""
        new = self.copy()
        new.value = self.value - other.value
        return new
    def __rsub__(self, other):
        new = self.copy()
        new.value = other.value - self.value
        return new

    def __mul__(self, other):
        """
        Multiply self by other returning the result in a new object.  The
        number of digits is that of self.

        Note that FixedPoint(x) * int(y) is much more efficient than
        FixedPoint(x) * FixedPoint(y)
        """
        new = self.copy()
        if isinstance(other, (int, long)):
            # Multiply by scalar
            new.value = self.value * other
        else:
            new.value = (self.value * other.value) // other.base
        return new
    __rmul__ = __mul__

    def __div__(self, other):
        """
        Divide self by other returning the result in a new object.  The
        number of digits is that of self.

        Note that FixedPoint(x) / int(y) is much more efficient than
        FixedPoint(x) / FixedPoint(y)
        """
        new = self.copy()
        if isinstance(other, (int, long)):
            # Divide by scalar
            new.value = self.value // other
        else:
            new.value = (self.value * other.base) // other.value
        return new
    def __rdiv__(self, other):
        if not isinstance(other, FixedPoint):
            other = FixedPoint(other, self.digits)
        return other.__div__(self)

    def __str__(self):
        """
        Convert self into a string.  This will be the integral part of
        the number possibly preceded by a - sign followed by a . then
        exactly n digits where n is the number of digits specified on
        creation.
        """
        if self.value < 0:
            s = str(-self.value)
        else:
            s = str(self.value)
        s = s.zfill(self.digits + 1)
        s = s[:-self.digits] + "." + s[-self.digits:]
        if self.value < 0:
            s = "-" + s
        return s
    
    def __abs__(self):
        """Return the absolute value of self"""
        new = self.copy()
        if new.value < 0:
            new.value = - new.value
        return new

    def __cmp__(self, other):
        """Compare self with other"""
        return cmp(self.value, other.value)

def sqrt(n):
    """
    Return the square root of n.  It uses a second order
    Newton-Raphson convgence.  This doubles the number of significant
    figures on each iteration.  This will work for any finite
    precision numeric type.
    """
    x = n / 2                           # FIXME find a better guess!
    old_delta = None
    while 1:
        x_old = x
        x = (x + n / x) / 2
        delta = abs(x - x_old)
        if old_delta is not None and delta >= old_delta:
            break
        old_delta = delta
    return x

def pi_agm(one = 1.0, sqrt=sqrt):
    """
    Brent-Salamin Arithmetic-Geometric Mean formula for pi.  This
    converges quadratically.

    FIXME can increase the number of digits in each iteration to speed up?
    """
    _1 = one
    _2 = _1 + _1
    a = _1
    b = _1/sqrt(_2)
    t = _1/2
    k = 1
    two_to_the_k = 2L
    old_delta = None

    while 1:
        s = (a + b ) / 2
        d = a - s
        d = d * d
        a = s
        s = s * s
        t = t - two_to_the_k * d
        b = sqrt(s - d)
        delta = abs(a - b)
        # print k, delta, old_delta
        if old_delta is not None and delta >= old_delta:
            break
        old_delta = delta
        k = k + 1
        two_to_the_k *= 2

    a = a + b
    return ( a * a ) / ( _2 * t)

if __name__ == "__main__":
    try:
        digits = int(sys.argv[1])
    except:
        digits = 100
    print "Calculating",digits,"digits of pi"
    start = time()
    FixedPoint.set_digits(digits)
    _1 = FixedPoint(1)
    print pi_agm(_1, sqrt=sqrt)
    dt = time() - start
    print "That took",dt,"seconds"
------------------------------------------------------------

>  But Python is much slower here then C here. I used a while-loop within a 
>  while-loop. Not that much calculation here.

There is more than one way to skin this cat.  A better algorithm helps
a lot.

If I really wanted lots of digits of pi from python I'd do it like
this.  This is an example of the right tool for the job. 0.5ms looks
pretty good to me!

   >>> import math, gmpy
   >>> bits = int(800/math.log10(2))
   >>> start = time(); pi=gmpy.pi(bits); dt = time()-start
   >>> print "That took",dt,"seconds"
   That took 0.00055193901062 seconds
   >>> pi
   mpf('3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093844609550582231725359408128481117450284102701938521105559644622948954930381964428810975665933446128475648233786783165271201909145648566923460348610454326648213393607260249141273724587006606315588174881520920962829254091715364367892590360011330530548820466521384146951941511609433057270365759591953092186117381932611793105118548074462379962749567351885752724891227938183011949129833673362440656643086021394946395224737190702179860943702770539217176293176752384674818467669405132000568127145263560827785771342757789609173637178721468440901224953430146549585371050792279689258923542019956112129021960864034418159813629774771309960518707211349999998372978049951059731732816096318595024459455e0',2657)
   >>> 

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


From nagle at animats.com  Fri Jan 19 20:20:34 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 20 Jan 2007 01:20:34 GMT
Subject: More M2Crypto issues
In-Reply-To: <L_6dnVPmutZyhyzYnZ2dnUVZ_tSdnZ2d@comcast.com>
References: <bxFrh.2340$O02.2297@newssvr11.news.prodigy.net>
	<mailman.2887.1169173756.32031.python-list@python.org>
	<6u7sh.264$4H1.150@newssvr17.news.prodigy.net>
	<L_6dnVPmutZyhyzYnZ2dnUVZ_tSdnZ2d@comcast.com>
Message-ID: <C7esh.21509$yC5.9079@newssvr27.news.prodigy.net>

Heikki Toivonen wrote:
> John Nagle wrote:
> 
>>    Actually, at the moment I'm having an M2Crypto problem related
>>to a SWIG/OpenSSL conflict.  Older versions of OpenSSL have an
>>include file that needs __i386__ defined, which is something GCC
>>does based on what platform you're on.  SWIG uses CPP, but
>>doesn't set the platform defines, so the SWIG phase of the
>>M2Crypto build fails.  I'm currently trying to get the shared
>>host where that build took place upgraded to a later version of
>>OpenSSL, but that requires a server restart, so it may take
>>a few days.  I'm doing something that requires M2Crypto to
>>run on a range of machines, which turns out to be rather harder
>>than expected.
> 
> 
> Which version of OpenSSL is that?

M2Crypto 0.17 requirements:
	Python 2.3 or newer
           o m2urllib2 requires Python 2.4 or newer
	OpenSSL 0.9.7 or newer
           o Some optional new features will require OpenSSL 0.9.8 or newer
	SWIG 1.3.24 or newer

Server in use:
	Python version: "Python 2.5 (r25:51908, Jan 18 2007, 10:46:37)"
	OpenSSL version: "OpenSSL 0.9.7a Feb 19 2003"
	SWIG version: "SWIG Version 1.3.31"
	GCC version: "[GCC 3.4.4 20050721 (Red Hat 3.4.4-2)] on linux2"
	Computer: Athlon 686 rackmount server.

The actual build failure is:

running build_ext
building 'M2Crypto.__m2crypto' extension
swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c
swig -python -I/usr/include -o SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i
/usr/include/openssl/opensslconf.h:27: Error: CPP #error ""This openssl-devel 
package does not work your architecture?"". Use the -cpperraswarn option to 
continue swig processing.
error: command 'swig' failed with exit status 1

The problem is that "opensslconf.h" expects the compiler to define __i386__
when running the C preprocessor, and SWIG doesn't do that.  Compare
"opensslconf.h" in different versions of OpenSSL; it's changed considerably.

					John Nagle


From sigzero at gmail.com  Mon Jan 22 15:02:31 2007
From: sigzero at gmail.com (Robert Hicks)
Date: 22 Jan 2007 12:02:31 -0800
Subject: SQLObject 0.8.0b2
In-Reply-To: <mailman.2992.1169490156.32031.python-list@python.org>
References: <mailman.2992.1169490156.32031.python-list@python.org>
Message-ID: <1169496151.864232.65190@m58g2000cwm.googlegroups.com>

Where is Oracle support?



From gagsl-py at yahoo.com.ar  Mon Jan 22 14:35:49 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 22 Jan 2007 16:35:49 -0300
Subject: closing a "forever" Server Socket
In-Reply-To: <1169488142.312711.322320@51g2000cwl.googlegroups.com>
References: <1169123381.930403.24170@38g2000cwa.googlegroups.com>
	<1169143715.222186.30530@51g2000cwl.googlegroups.com>
	<1169482385.253887.249030@51g2000cwl.googlegroups.com>
	<mailman.2990.1169484872.32031.python-list@python.org>
	<1169488142.312711.322320@51g2000cwl.googlegroups.com>
Message-ID: <7.0.1.0.0.20070122162756.059d70a8@yahoo.com.ar>

At Monday 22/1/2007 14:49, alessandro wrote:

>Oh my God! it's really so complicated?
>
>3 modules (threading, SocketServer, select) only for design a way to
>shutdown a TCP server????
>...but they told me that python was easy... :)

You already have the answer: replace serve_forever with your own loop.

>I'm working on a simulator and I have a monitor server that collects
>information. I can shutdown it using Ctrl-C from the keyboard but for
>my purpose could be very nice if I introduce a timer. So I could launch
>my monitor like this:
>./monitor 100
>
>and my monitor will run for 100 seconds. For this I'm using the Timer

This is simple enough, I presume:

   try:
     stopt = time.time()+100
     while time.time()<stopt:
         server.handle_request()
   except KeyboardInterrupt: pass
   # shutdown

The drawback is that it won't leave the loop until a request arrives, 
but this may not be a problem for you. (Other suggestions are more 
complicated because of this issue.)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From no-spam at no-spam-no-spam.invalid  Thu Jan 11 05:07:21 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 11 Jan 2007 11:07:21 +0100
Subject: Parallel Python
In-Reply-To: <1168452879.866265.36880@i39g2000hsf.googlegroups.com>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<1168452879.866265.36880@i39g2000hsf.googlegroups.com>
Message-ID: <eo528r$jq3$1@news.albasani.net>

sturlamolden wrote:
> Nick Maclaren wrote:
> 
> I wonder if too much emphasis is put on thread programming these days.
> Threads may be nice for programming web servers and the like, but not
> for numerical computing. Reading books about thread programming, one
> can easily get the impression that it is 'the' way to parallelize
> numerical tasks on computers with multiple CPUs (or multiple CPU


Most threads on this planet are not used for number crunching jobs, but for "organization of execution".

Also if one wants to exploit the speed of upcoming multi-core CPUs for all kinds of fine grained programs, things need fast fine grained communication - and most important: huge data trees in memory have to be shared effectively.
CPU frequencies will not grow anymore in the future, but we will see multi-cores/SMP. How to exploit them in a manner as if we had really faster CPU's: threads and thread-like techniques.

Things like MPI, IPC are just for the area of "small message, big job" - typically sci number crunching, where you collect the results "at the end of day". Its more a slow network technique.

A most challenging example on this are probably games - not to discuss about gaming here, but as tech example to the point: Would you do MPI, RPC etc. while 30fps 3D and real time physics simulation is going on?


Robert


From sturlamolden at yahoo.no  Wed Jan 10 12:15:42 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 10 Jan 2007 09:15:42 -0800
Subject: Parallel Python
In-Reply-To: <entr6s$ovo$1@news.albasani.net>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
Message-ID: <1168449342.414838.181050@p59g2000hsd.googlegroups.com>


robert wrote:

> Thats true. IPC through sockets or (somewhat faster) shared memory -  cPickle at least - is usually the maximum of such approaches.
> See http://groups.google.de/group/comp.lang.python/browse_frm/thread/f822ec289f30b26a
>
> For tasks really requiring threading one can consider IronPython.
> Most advanced technique I've see for CPython ist posh : http://poshmodule.sourceforge.net/


In SciPy there is an MPI-binding project, mpi4py.

MPI is becoming the de facto standard for high-performance parallel
computing, both on shared memory systems (SMPs) and clusters. Spawning
threads or processes is not recommended way to do numerical parallel
computing. Threading makes programming certain tasks more convinient
(particularly GUI and I/O, for which the GIL does not matter anyway),
but is not a good paradigm for dividing CPU bound computations between
multiple processors. MPI is a high level API based on a concept of
"message passing", which allows the programmer to focus on solving the
problem, instead on irrelevant distractions such as thread managament
and synchronization.

Although MPI has standard APIs for C and Fortran, it may be used with
any programming language. For Python, an additional advantage of using
MPI is that the GIL has no practical consequence for performance. The
GIL can lock a process but not prevent MPI from using multiple
processors as MPI is always using multiple processes. For IPC, MPI will
e.g. use shared-memory segments on SMPs and tcp/ip on clusters, but all
these details are hidden.

It seems like 'ppsmp' of parallelpython.com is just an reinvention of a
small portion of MPI.


http://mpi4py.scipy.org/
http://en.wikipedia.org/wiki/Message_Passing_Interface



From bruno.desthuilliers at websiteburo.com  Wed Jan 17 11:38:16 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Wed, 17 Jan 2007 17:38:16 +0100
Subject: Python Web Frameworks
In-Reply-To: <1169048071.353887.279160@q2g2000cwa.googlegroups.com>
References: <1169048071.353887.279160@q2g2000cwa.googlegroups.com>
Message-ID: <45ae50f7$0$4263$426a74cc@news.free.fr>

Shortash a ?crit :
> Hi Gurus,
> 
> I want to build a Python web app but im not sure which one to go for. I
> prefer something like asp.Net , which would allow me to fully seperate
> the presentation layer from the logic. Please advise?

Django, Turbogears, Pylons(HQ), web.py, etc, etc, etc...

Welcome to Python, the language with more web frameworks than keywords !-)


From gert.cuykens at gmail.com  Fri Jan  5 23:45:47 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Sat, 6 Jan 2007 05:45:47 +0100
Subject: attribute decorators
In-Reply-To: <1168058094.179442.173650@s34g2000cwa.googlegroups.com>
References: <1168058094.179442.173650@s34g2000cwa.googlegroups.com>
Message-ID: <ef60af090701052045u1c571d81nfcf6651845bd00aa@mail.gmail.com>

sorry for repost i just found out the news group comp.lang.python is
the same as python-list at python.org :)

On 5 Jan 2007 20:34:54 -0800, gert <gert.cuykens at gmail.com> wrote:
> Would it not be nice if you could assign decorators to attributes too ?
> for example
>
> class C:
>   @staticattribute
>   data='hello'
>
> or
>
> class C:
>   @privateattribute
>   data='hello'
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From george.sakkis at gmail.com  Sun Jan 21 03:20:40 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 21 Jan 2007 00:20:40 -0800
Subject: mmap caching
Message-ID: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>

I've been trying to track down a memory leak (which I initially
attributed erroneously to numpy) and it turns out to be caused by a
memory mapped file. It seems that mmap caches without limit the chunks
it reads, as the memory usage grows to several hundreds MBs according
to the Windows task manager before it dies with a MemoryError. I'm
positive that these chunks are not referenced anywhere else; in fact if
I change the mmap object to a normal file, memory usage remains
constant. The documentation of mmap doesn't mention anything about
this. Can the caching strategy be modified at the user level ?

George



From mensanator at aol.com  Mon Jan  8 19:30:35 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: 8 Jan 2007 16:30:35 -0800
Subject: Bitwise expression
References: <enud98$960$1@ss408.t-com.hr>
Message-ID: <1168302635.083841.54290@38g2000cwa.googlegroups.com>


Gigs_ wrote:
> Can someone explain me bitwise expression?
> few examples for every expression will be nice
>
> x << y Left shift
> x >> y Right shift
> x & y Bitwise AND
> x | y Bitwise OR
> x ^ y Bitwise XOR (exclusive OR)
> ~x Bitwise negation
>
>
> thanks people


Here's some examples:

##    What is BINARY?
##
##     n   base 2
##    -- --------
##     0 00000000
##     1 00000001
##     2 00000010
##     3 00000011
##     4 00000100
##     5 00000101
##     6 00000110
##     7 00000111
##     8 00001000
##     9 00001001
##    10 00001010
##    11 00001011
##    12 00001100
##    13 00001101
##    14 00001110
##    15 00001111
##
##
##    What does << do?
##
##        00000111
##     << 00000100
##    ------------
##        01110000
##
##    What does >> do?
##
##        00100100
##     >> 00000010
##    ------------
##        00001001
##
##    What does & do?
##
##        00011011
##      & 00001001
##    ------------
##        00001001
##
##        00011011
##      & 00001110
##    ------------
##        00001010
##
##    What does | do?
##
##        00010001
##      | 00001010
##    ------------
##        00011011
##
##        00011011
##      | 00010001
##    ------------
##        00011011
##
##    What does ^ do?
##
##        00011011
##      ^ 00011111
##    ------------
##        00000100
##
##        00011111
##      ^ 00001110
##    ------------
##        00010001
##
##    Bitwise demo: the Collatz Conjecture
##
##    41 31 47 71 107 161 121 91 137 103 155 233
##    175 263 395 593 445 167 251 377 283 425 319
##    479 719 1079 1619 2429 911 1367 2051 3077
##    577 433 325 61 23 35 53 5 1


bitwise.py

import gmpy  # has lots of neat bitwise operations
             # not found in standard Python

def convert_to_binary(n,bits):
    s = gmpy.digits(n,2)       # base 2 conversion
    s = '0'*(bits-len(s)) + s  # add leading 0's
    return s

def report(n,m,o,p):
    print '    %s' % (n)
    print '%3s %s' % (o,m)
    print '------------'
    print '    %s' % (p)
    print

def Collatz(n):
    # if n is even, divide by 2
    # if n is odd, multiply by 3 and add 1
    # Collat Conjecture: n always reaches 1
    while n>1:
        # find bit position of LS 1 bit
        f = gmpy.scan1(n)
        if f == 0:       # then n is odd
            n = n*3 + 1
        else:            # n is even
            # remove all factors of 2 in one fell swoop
            n = n >> f
            print n,
    print


print 'What is BINARY?'

print """
 n   base 2
-- --------"""
for n in xrange(16):
    print '%2d %s' % (n,convert_to_binary(n,8))


print
print

print 'What does << do?'
print

report(convert_to_binary(7,8), \
       convert_to_binary(4,8), \
       '<<', \
       convert_to_binary(7<<4,8))

print 'What does >> do?'
print

report(convert_to_binary(36,8), \
       convert_to_binary(2,8), \
       '>>', \
       convert_to_binary(36>>2,8))

print 'What does & do?'
print

report(convert_to_binary(27,8), \
       convert_to_binary(9,8), \
       '&', \
       convert_to_binary(27&9,8))

report(convert_to_binary(27,8), \
       convert_to_binary(14,8), \
       '&', \
       convert_to_binary(27&14,8))

print 'What does | do?'
print

report(convert_to_binary(17,8), \
       convert_to_binary(10,8), \
       '|', \
       convert_to_binary(17|10,8))

report(convert_to_binary(27,8), \
       convert_to_binary(17,8), \
       '|', \
       convert_to_binary(27|17,8))

print 'What does ^ do?'
print

report(convert_to_binary(27,8), \
       convert_to_binary(31,8), \
       '^', \
       convert_to_binary(27^31,8))

report(convert_to_binary(31,8), \
       convert_to_binary(14,8), \
       '^', \
       convert_to_binary(31^14,8))

print 'Bitwise demo: the Collatz Conjecture'
print
Collatz(27)



From vithi99 at hotmail.com  Mon Jan 15 00:11:31 2007
From: vithi99 at hotmail.com (vithi)
Date: 14 Jan 2007 21:11:31 -0800
Subject: How to write code to get focuse the application which is open
	from server
In-Reply-To: <45a0dae2$0$8948$4c368faf@roadrunner.com>
References: <1168143871.536432.252010@v33g2000cwv.googlegroups.com>
	<45a0dae2$0$8948$4c368faf@roadrunner.com>
Message-ID: <1168837891.232014.270150@11g2000cwr.googlegroups.com>

Hi Paul,
Since your reply I try to use pywinauto. I was able to get the control
of a window that is a good news but it is not working for sub window
this main window create.(popup windows)
eg) File -> print    will open print window but the code is not
clicking print button. I try several combination
app,Print.OK.CloseClick() or app,Print.OK.Click() is not working

my code goes like that
app=application.Application()
qi = app.window_(title_re = ".*arcMap.*")
qi.TypeKeys("%FP")
app,Print.OK.Click()

the last line of code is not working same thing with file open to
qi.TypeKeys("%FO") create popup window "open" but
app,Open.Filename.SetEditText("test1,txt") is not working any help to
overcome to this problem (Here the "Print" , "Open" are windows title I
am using without any undestanding why I am using. Any help?





Paul McGuire wrote:
> "vinthan" <svithi at gmail.com> wrote in message
> news:1168143871.536432.252010 at v33g2000cwv.googlegroups.com...
> > hi,
> > I am new to python. I have to write test cases in python. An
> > application is open in the desk top ( application writen in .Net) I
> > have to write code to get focuse the application and click on the link
> > which in the one side  and it will load the map on the other and I have
> > to check map is loaded. Any one tell me how do I use Dispatch or any
> > other method to write a code.
> >
> If you are running on Windows, look into pywinauto
> (http://www.openqa.org/pywinauto/).
>
> I have successfully used it to interact with a Flash animation running
> within an IE browser.
>
> I also had to inspect the graphics displayed by the Flash animation, for
> this I used PIL (http://www.pythonware.com/products/pil/).
> 
> Good luck,
> -- Paul



From duncan.booth at invalid.invalid  Tue Jan  9 13:43:58 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 Jan 2007 18:43:58 GMT
Subject: Question about using "with"
References: <Pine.LNX.4.64.0701091256501.25764@saturn.syslang.net>
	<mailman.2488.1168367138.32031.python-list@python.org>
Message-ID: <Xns98B3BE8EEAEB4duncanbooth@127.0.0.1>

Laszlo Nagy <gandalf at designaproduct.biz> wrote:

> 
>>
>> 591 > ./cat.py cat.py
>>    File "./cat.py", line 6
>>      with open(sys.argv[nn]) as f:
>>              ^
>> SyntaxError: invalid syntax
>> 592 >
>>
>> This example came from http://docs.python.org/tut/node10.html down in 
>> section 8.7
>>
>> Am I missing something?
>>   
> Are you using python 2.5? The with statement is not available before 2.5.
> 
and even in Python 2.5 it isn't available unless you enable it. Add the 
following line before the 'import sys' line:

from __future__ import with_statement


From gagsl-py at yahoo.com.ar  Tue Jan 23 13:56:12 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 23 Jan 2007 15:56:12 -0300
Subject: Reading character from keyboard
In-Reply-To: <1169576879.920810.306490@q2g2000cwa.googlegroups.com>
References: <mailman.3032.1169571299.32031.python-list@python.org>
	<1169576879.920810.306490@q2g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070123155521.04227a68@yahoo.com.ar>

At Tuesday 23/1/2007 15:28, consmash at gmail.com wrote:

> > A very simple question. I would like to read a single character from the
> > keyboard (y or n). I have tried to look in my Python books and a google
>
>Actually, if you want to read only one character from keyboard, you
>will need to use terminal operations rather than plain input stream.
>Unfortunately this is rather not portable solution. For Windows you
>have to import msvcrt, on Unices curses module. The latter code is

There is a portable getch implementation, search the Python Cookbook.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From gagsl-py at yahoo.com.ar  Wed Jan 10 02:00:43 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 10 Jan 2007 04:00:43 -0300
Subject: File Closing Problem in 2.3 and 2.4, Not in 2.5 (Final
  report)
In-Reply-To: <20070110053618.GA24572@chiclet.dreamhost.com>
References: <2BBAEE949D384D40A2B851287ADB6A4304595A6D@eugsrv400.psc.pscnet.com>
	<7.0.1.0.0.20070109203637.0422acb8@yahoo.com.ar>
	<20070110053618.GA24572@chiclet.dreamhost.com>
Message-ID: <7.0.1.0.0.20070110035559.03fcf550@yahoo.com.ar>

At Wednesday 10/1/2007 02:36, Julio Biason wrote:

>[Kinda stealing the thread]

(at least a related question!)

>If I use a file() in a for, how to I explicitely close the file?
>
><code>
>for line in file('contents'):
>    print line
></code>
>
>Would this work like the new 'with' statement or it will only be closed
>when the GC finds it?

Yes, the with statement is well suited for this:

with open('contents') as f:
   for line in f:
     print line

In earlier versions of Python you would write:

f = open('contents')
try:
   for line in f:
     print line
finally:
   f.close()


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From rzantow at gmail.com  Fri Jan 19 22:33:26 2007
From: rzantow at gmail.com (rzed)
Date: Fri, 19 Jan 2007 22:33:26 -0500
Subject: **argv can't work
References: <mailman.2928.1169263231.32031.python-list@python.org>
Message-ID: <Xns98BDE57732DDBrzantowgmailcom@208.49.80.253>

"Jm lists" <practicalperl at gmail.com> wrote in 
news:mailman.2928.1169263231.32031.python-list at python.org:

> hello members,
> 
> See my script piece below:
> 
> def testB(shift,**argv):
>     print "first argument is %s" %shift
>     print "all other arguments are:",argv
> 
> testB('mails','Jen','Jen at att.com','Joe','Joe at aol.com')
> 
> It can't work at all.please help tell me the reasons.thanks.
> 

You have too many asterisks before argv. Use just one, like this:
def testB(shift,*argv):
    print "first argument is %s" %shift
    print "all other arguments are:",argv

testB('mails','Jen','Jen at att.com','Joe','Joe at aol.com')

Two asterisks signifies keyword arguments, like this:

def f(**c):
    for k,v in c.items():
         print k,v

f(a=1,b=2)


From steve at holdenweb.com  Wed Jan 10 19:03:26 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 11 Jan 2007 00:03:26 +0000
Subject: what is the idiom for copy lots of params into self?
In-Reply-To: <20070110234511.11447.2048857953.divmod.quotient.12511@ohm>
References: <1168469214.452389.221180@p59g2000hsd.googlegroups.com>
	<20070110234511.11447.2048857953.divmod.quotient.12511@ohm>
Message-ID: <eo3usl$2e1$1@sea.gmane.org>

Jean-Paul Calderone wrote:
> On 10 Jan 2007 14:46:54 -0800, Emin <emin.shopper at gmail.com> wrote:
>> Dear Experts,
>>
>> When writing large classes, I sometimes find myself needing to copy a
>> lot of parameters from the argument of __init__ into self. Instead of
>> having twenty lines that all basically say something like self.x = x, I
>> often use __dict__ via something like:
>>
>> class example:
>>     def __init__(self,a,b,c,d,e,f,g,h,i,j,k,l,m,n):
>>         for name in
>> ['a','b','c','d','e','f','g','h','i','j','k','l','m','n']:
>>             self.__dict__[name] = locals()[name]
>>
>> This saves a lot of code and makes it easier to see what is going on,
>> but it seems like there should be a better idiom for this task. Any
>> suggestions?
> 
> I use a helper, like 
> 
>   http://divmod.org/trac/browser/trunk/Epsilon/epsilon/structlike.py#L35
> 
If you don't want to go that far then this might give you an idea or two:

  >>> class example:
  ...      def __init__(self,a,b,c,d,e,f,g,h,i,j,k,l,m,n):
  ...         for name in inspect.getargspec(example.__init__)[0]:
  ...             print name
  ...
  >>> x = example(1,2,3,4,5,6,7,8,9,10,11,12,13,14)
self
a
b
c
d
e
f
g
h
i
j
k
l
m
n
  >>>

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From webraviteja at gmail.com  Tue Jan  9 02:07:17 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 8 Jan 2007 23:07:17 -0800
Subject: How to write temporary data to file?
In-Reply-To: <mailman.2465.1168325623.32031.python-list@python.org>
References: <mailman.2461.1168316179.32031.python-list@python.org>
	<1168324907.803841.79020@42g2000cwt.googlegroups.com>
	<mailman.2465.1168325623.32031.python-list@python.org>
Message-ID: <1168326437.416524.154770@v33g2000cwv.googlegroups.com>


Thomas Ploch wrote:
> Ravi Teja schrieb:
> > Thomas Ploch wrote:
> >> Hi folks,
> >>
> >> I have a data structure that looks like this:
> >>
> >> d = {
> >> 	'url1': {
> >> 		'emails': ['a', 'b', 'c',...],
> >> 		'matches': ['d', 'e', 'f',...]
> >> 	},
> >> 	'url2': {...
> >> }
> >>
> >> This dictionary will get _very_ big, so I want to write it somehow to a
> >> file after it has grown to a certain size.
> >>
> >> How would I achieve that?
> >>
> >> Thanks,
> >> Thomas
> >
> > Pickle/cPickle are standard library modules that can persist data.
> > But in this case, I would recommend ZODB/Durus.
> >
> > (Your code example scares me. I hope you have benevolent purposes for
> > that application.)
> >
> > Ravi Teja.
> >
>
> Thanks, but why is this code example scaring you?
>
> Thomas

The code indicates that you are trying to harvest a _very_ (as you put
it) large set of email addresses from web pages. With my limited
imagination, I can think of only one group of people who would need to
do that. But considering that you write good English, you must not be
one of those mean people that needed me to get a new email account just
for posting to Usenet :-).

Ravi Teja.



From anthonydevine69 at hotmail.com  Fri Jan 12 11:35:35 2007
From: anthonydevine69 at hotmail.com (tonydevlin)
Date: Fri, 12 Jan 2007 08:35:35 -0800 (PST)
Subject: ArchGenXML please help
Message-ID: <8301441.post@talk.nabble.com>


I am creating a workflow in plone using argouml and archgenxml.  I have been
following the steps on the site:-
http://plone.org/documentation/tutorial/anonymously-adding-custom-content-types-with-argouml-and-archgenxml/creating-a-class-and-workflow-with-argouml

However I am confused at step 9 in creating the class section, where it
says:
"Now, save this file as "ProcessImprovement.zargo".  Pull up a command
prompt and navigate to that directory.  Make sure that you've added the
ArchGenXML directory to your env path, and type the following:
C:\Sandbox\Plone\Tutorial>ArchGenXML.py ProcessImprovement.zargo"

I have saved the file in the location 
C:\Documents and Settings\Tony\Desktop\Test\ProcessImprovement.zargo
However I dont know what to type in the python command prompt!!!

Can anyone help my, I would be very greatful, or if I am in the wrong place
do you know another forum where I could go as I have tried the plone online
on and it is no good.
Thank you.
-- 
View this message in context: http://www.nabble.com/ArchGenXML-please-help-tf2966867.html#a8301441
Sent from the Python - python-list mailing list archive at Nabble.com.



From ptmcg at austin.rr._bogus_.com  Wed Jan 17 23:19:14 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 17 Jan 2007 22:19:14 -0600
Subject: example from the book
References: <1169087861.453278.58680@a75g2000cwd.googlegroups.com>
Message-ID: <45aef543$0$5176$4c368faf@roadrunner.com>

"questions?" <universal_used at hotmail.com> wrote in message 
news:1169087861.453278.58680 at a75g2000cwd.googlegroups.com...
>I am a little confused by an example in python book:
>
> class wrapper:
>    def __init__(self,object):
>        self.wrapped=object
>    def __getattr__(self,attrname):
>        print "Trace:",attrname                   (<<<===)
>        print getattr(self.wrapped,attrname)       (*)
>        return getattr(self.wrapped,attrname)     (**)
>
> x=wrapper({"a":1, "b":2})
> print x.keys()                                                 (**)
>
>
> (*) will output: <built-in method keys of dict object at 0xb7f0f4f4>
> while two (**) statements together will print the keys of the
> dictionary which is ['a','b']
>
> why (*) doen't output the same result as (**)?
>
> Thanks

Because the line (*) prints out the reference to a method, and the second 
line labeled (**) calls that method and prints that method's return value. 
As a hint, what does the line marked by (<<<===) print?  I'm guessing it 
printed the attribute name 'keys'.  __getattr__ didn't return the dict's 
keys, it returned the dict's "keys" method, which the calling code then 
invoked with ()'s, which invoked the wrapped object's "keys" method, which 
returned the wrapped object's keys, 'a' and 'b'.

-- Paul 




From watsocd at gmail.com  Mon Jan 15 19:06:34 2007
From: watsocd at gmail.com (Chuck)
Date: 15 Jan 2007 16:06:34 -0800
Subject: ReportLab - Frames - Images
In-Reply-To: <45AC0E9D.80104@jessikat.plus.net>
References: <1168898486.300488.264920@a75g2000cwd.googlegroups.com>
	<45AC0E9D.80104@jessikat.plus.net>
Message-ID: <1168905994.474726.46180@51g2000cwl.googlegroups.com>

Thanks for the help. I made you changes but it still puts the picture
above the text, not beside the text.

I also found a user group at
http://news.gmane.org/gmane.comp.python.reportlab.user . It may be the
same. I have now posted there.

Chuck



From robert.kern at gmail.com  Fri Jan 26 15:29:23 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 26 Jan 2007 14:29:23 -0600
Subject: Unicode error handler
In-Reply-To: <epdmae$qps$1@sea.gmane.org>
References: <epdmae$qps$1@sea.gmane.org>
Message-ID: <epdob5$dh9$1@sea.gmane.org>

Rares Vernica wrote:
> Is there an encode/decode error handler that can replace all the 
> not-ascii letters from iso-8859-1 with their closest ascii letter?

No, but IBM's ICU library can transform one script to another in very flexible
and capable ways. One such configuration can do what you ask.

  http://www-306.ibm.com/software/globalization/icu/index.jsp
  http://icu.sourceforge.net/userguide/Transform.html

Unfortunately, I don't think any of the available ICU bindings for Python have
exposed this functionality. If you wanted to contribute such, you might want to
start with PyICU. It seems to be the most actively developed of the bindings.

  http://pyicu.osafoundation.org/

Of course, that's overkill for this problem. Those transformations can handle
such things as this:

  ??????????? ?????????	Alphab?tik?s Kat?logos

The number of characters in iso-8859-1 that you would want to transliterate is
not all that large. You could spend a little bit of time going through the
character set and making a translation map for str.translate().

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From steve at REMOVE.THIS.cybersource.com.au  Tue Jan 16 04:53:46 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 16 Jan 2007 20:53:46 +1100
Subject: How to convert float to sortable integer in Python
References: <1168939312.223194.184770@l53g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.16.09.53.46.92208@REMOVE.THIS.cybersource.com.au>

On Tue, 16 Jan 2007 01:21:52 -0800, shellon wrote:

> Hi all:
>     I want to convert the float number to sortable integer, like the
> function float2rawInt() in java, but I don't know the internal
> expression of float, appreciate your help!

Google says:

Your search - float2rawInt - did not match any documents. 

Are you sure about that function? What's a sortable integer?


-- 
Steven.



From basti.wiesner at gmx.net  Tue Jan  2 11:17:37 2007
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Tue, 02 Jan 2007 17:17:37 +0100
Subject: How do I add users using Python scripts on a Linux machine
References: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>
	<qt5jp2pq4a6a9b4gpha1rvou0cl7ji1gem@4ax.com>
	<mailman.2191.1167695021.32031.python-list@python.org>
	<1167720155.296077.233010@42g2000cwt.googlegroups.com>
	<endrll$gjk$1@news1.carnet.hr>
	<1167752161.755406.31470@v33g2000cwv.googlegroups.com>
Message-ID: <ene0j1$6nk$03$1@news.t-online.com>

Ravi Teja <webraviteja at gmail.com> typed

> 
> Ivan Voras wrote:
>> Ramdas wrote:
>> > Well,
>> >
>> > I need to add users from a web interface for a web server, which
>> > runs only Python. I need to add users, set quotas and in future
>> > even look at managing ip tables to limit bandwidth.
>> >
>> > I know os.system(), but this has to be done through a form entry
>> > through a web interface.
>> >
>> > Anyways thanks, do advise if there more pythonic solutions
>>
>> What you're looking for is actually a pretty complex thing. You
>> *could* in theory manage /etc/passwd (and its "shadow" file) - you
>> can find crypto primitives like MD5 and DES on the 'net, but note
>> that you must run your script under the 'root' account in order to
>> write (and even read!) the passwd database. The same goes for using
>> os.system and the built-in OS utility. Be aware of security
>> implications if you're running your web server under the root
>> account.
> 
> How about invoking scripts with SUID root set?

Linux seems to ignore SUID bit on scripts:

[lunar at nargond]-[17:03:23] >> ~/test
--> cat uidtest.py
#!/usr/bin/python
import os

print 'uid:', os.getuid()
print 'effective uid:', os.geteuid()
os.system('whoami')

[lunar at nargond]-[17:03:28] >> ~/test
--> ls -l uidtest.py
-rwsr-xr-x 1 root root 112 2007-01-02 17:03 uidtest.py

[lunar at nargond]-[17:03:46] >> ~/test
--> /home/lunar/test/uidtest.py
uid: 1000
effective uid: 1000
lunar

Anyway, you should definitely think about security issues. Not all
people out there are friendly...

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From arkanes at gmail.com  Mon Jan  8 15:52:49 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 8 Jan 2007 14:52:49 -0600
Subject: Fwd: Execute binary code
In-Reply-To: <4866bea60701081251we2bf7f3vb55a285ee20e91f6@mail.gmail.com>
References: <1168284300.638111.191440@38g2000cwa.googlegroups.com>
	<EOSdneXxmrS6OT_YnZ2dnUVZ_q7inZ2d@comcast.com>
	<1168289145.319706.199950@11g2000cwr.googlegroups.com>
	<4866bea60701081251we2bf7f3vb55a285ee20e91f6@mail.gmail.com>
Message-ID: <4866bea60701081252o3acf0470x4607613961da7b5e@mail.gmail.com>

On 8 Jan 2007 12:45:45 -0800, citronelu at yahoo.com <citronelu at yahoo.com> wrote:
> Larry Bates wrote:
>
> > What you are asking is a virus/trojan "like" program.  There's no reason
> > you shouldn't be able to write the code to TEMP directory and execute it.
> >
> > -Larry
>
>
> No, it is not about a trojan, but I guess it's pointless to try to
> convince you otherwise.
>
> It's not about being able to write the code to TEMP directory and
> execute it, it's about not wanting to do so.
>
> -Cornelius
>

Writing to a temp file will be at least 3 times as easy and twice as
reliable as any other method you come up with.


<sigh> Repost. Is there any chance at all that ML could set the
reply-to to the list instead of the sender?


From laurent.pointal at limsi.fr  Wed Jan 10 05:22:53 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 10 Jan 2007 11:22:53 +0100
Subject: convert binary data to int
In-Reply-To: <1168424278.193439.216770@k58g2000hse.googlegroups.com>
References: <1168424278.193439.216770@k58g2000hse.googlegroups.com>
Message-ID: <eo2fhf$ro7$1@upsn250.cri.u-psud.fr>

rubbishemail at web.de a ?crit :
> Hello,
> 
> 
> I need to convert a 3 byte binary string like
> "\x41\x00\x00" to 3 int values ( (65,0,0) in this case).
> The string might contain characters not escaped with a \x, like
> "A\x00\x00"
> 
> 
> Any ideas?

>>> s = "\x41\x00\x00"
>>> [ ord(c) for c in s ]
[65, 0, 0]




From bdesth.quelquechose at free.quelquepart.fr  Thu Jan 18 15:41:41 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 18 Jan 2007 21:41:41 +0100
Subject: PyMeld for html templates?
In-Reply-To: <mailman.2858.1169084154.32031.python-list@python.org>
References: <mailman.2858.1169084154.32031.python-list@python.org>
Message-ID: <45afd4f3$0$311$426a34cc@news.free.fr>

Sean Schertell a ?crit :
> I'm trying to decide which template system to get married to. I think  
> I've narrowed it down to PyMeld, Cheetah, or Jinja  but leaning  heavily 
> toward PyMeld because I love the idea that your templates are  *totally* 
> clean and that get manipulated from behind the scenes. This  seems to be 
> elegantly inline with the Sacred Creed of separation of  logic from 
> presentation.

"separating logic from presentation" is often misunderstood. It should 
really read "separating application logic from presentation logic", not 
"separating presentation logic from html code".

> Of course I'm going to try them all

The don't forget to have a look at Genshi and Mako too.

My 2 cents...


From altis at semi-retired.com  Tue Jan 16 23:11:31 2007
From: altis at semi-retired.com (Kevin Altis)
Date: Tue, 16 Jan 2007 20:11:31 -0800
Subject: OSCON 2007: Call for Proposals
Message-ID: <45ada124$0$497$815e3792@news.qwest.net>

OSCON 2007
http://conferences.oreillynet.com/os2007/

Save the date for the 9th annual O'Reilly Open Source Convention, happening
July 23-27, 2007 at the Oregon Convention Center in beautiful Portland,
Oregon.



Call For Participation
----------------------

Submit a proposal-fill out the form at:

http://conferences.oreillynet.com/cs/os2007/create/e_sess

Important Dates:

* The submission deadline for all proposals is February 5, 2007.

* Speakers will be notified by February 26, 2007.
* Final session details and speaker bios due May 20, 2007.
* Tutorial materials are due June 15, 2007.
* Conference: July 23-27, 2007

Proposals
---------

We want to hear about your winning techniques, favorite life-savers,
and the system you've made that everyone will be using next year.
We'll have tracks for sessions and tutorials on Linux, PHP, Perl,
Python, Ruby, Java, Databases, Desktop Applications,
Web Applications (client-side and server-side), Windows,
Administration, Security, and Emerging Topics.

We are considering proposals for 45 minute sessions and 3 hour tutorials.
We rarely accept 90 minute proposals, as most general sessions are 45
minutes in length.  Your proposals are examined by a committee which draws
from them and which also solicits proposals to build the program.  Proposals
are due by midnight (PST), Feb. 5, 2007.  The OSCON Speaker Manager, Vee
McMillen, emails notification of the status of your talk (accepted or
otherwise) by February 26, 2007.  Unless the content of your talk is
particularly timely (e.g., features of a product that will be launched at
OSCON), you are required to send us your slides several weeks before the
conference begins. Submit proposals via the form below.

http://conferences.oreillynet.com/cs/os2007/create/e_sess

Don't wait until the last moment to submit your proposal for the Python
track at OSCON 2007. The proposal deadline is less than three weeks away and
we have a limited number of tutorial and session slots available for Python
talks.




From gandalf at designaproduct.biz  Mon Jan 22 15:18:35 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Mon, 22 Jan 2007 21:18:35 +0100
Subject: mmap caching
In-Reply-To: <45B3FDA7.9030702@v.loewis.de>
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>	<45B3DD4D.3010009@v.loewis.de>	<1169422167.683707.264180@a75g2000cwd.googlegroups.com>
	<45B3FDA7.9030702@v.loewis.de>
Message-ID: <45B51C1B.2000705@designaproduct.biz>


> In fact, memory that is read in because of mmap should *never* cause
> a MemoryError. 
This is certainly not true. You can run out of virtual address space by 
reading data from a memory mapped file.
> Python calls MapViewOfFile when mmap.mmap is invoked,
> at which point the operating commits to providing that much address
> space to the application, along with backing storage on disk
> (typically, from the file being mapped, unless it is an anonymous
> map). Later access to the mapped range cannot fail (except for
> hardware errors), and if it would, you wouldn't see a MemoryError.
>   
Hmm, maybe I'm wrong. Are you sure that Windows allocates the size of 
the whole file in terms of memory address space? I also wrote a program 
before (in Delphi). That program was playing a memory mapped wave file. 
 From the task manager, I have seen that "used memory" was growing as 
the program was playing the wave file. For me, this indicates that 
Windows extends the mapped address space in chunks.

Regards,

   Laszlo



From steve at REMOVEME.cybersource.com.au  Tue Jan 30 02:47:33 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 30 Jan 2007 18:47:33 +1100
Subject: Help me understand this
References: <1170140737.027139.14920@h3g2000cwc.googlegroups.com>
Message-ID: <pan.2007.01.30.07.47.33.15637@REMOVEME.cybersource.com.au>

On Mon, 29 Jan 2007 23:05:37 -0800, ArdPy wrote:

> Hi,
> 
> Pls tell me whats going on in the code snippet below:
> 
>>>> n = 10
>>>> statstr = "N = ",n
>>>> type(statstr)                                 #case1
> <type 'tuple'>
>>>> print statstr
> ('N = ', 10)
>>>> print "N = ",n                               #case 2
> N =  10
> 
> In the first case the result is printed as a tuple and in the second 
> it appears as an ordinary string.


The print statement takes one or more comma-delimited objects, and prints
each one separated with a space, and then finally prints a newline. If you
end the list with a comma, no newline is printed. So when you execute the
line:

print "N = ", n

Python prints "N = ", then a space, then 10, then a newline.


Outside of a print statement (and also an "except" statement), commas
create tuples. So when you execute the line:

statstr = "N = ", n

the right-hand side is a tuple with two items. The first item is the
string "N = " and the second item is the integer currently named n (in
your case, 10).

Do not be fooled that brackets make tuples -- they don't. With the
exception of the empty tuple () which is a special case, it is commas that
make tuples. So these two lines have identical effects:

t = 1, 2, 3
t = (1, 2, 3)

That is why these two statements print something different:

print 1,2,3
print (1,2,3)

In the second case, the brackets force the expression "1,2,3" to be
evaluated before the print statement sees it, so the print statement sees
a single argument which is a tuple, instead of three int arguments.

(But notice that the brackets still aren't creating the tuple, the commas
are. The brackets just change the order of evaluation.)



-- 
Steven D'Aprano 



From stargaming at gmail.com  Mon Jan 29 10:25:26 2007
From: stargaming at gmail.com (Stargaming)
Date: Mon, 29 Jan 2007 16:25:26 +0100
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>
Message-ID: <epl3la$10g0$1@ulysses.news.tiscali.de>

NoName schrieb:
> Perl:
> @char=("A".."Z","a".."z",0..9);
> do{print join("", at char[map{rand @char}(1..8)])}while(<>);
> 
> !!generate passwords untill U press ctrl-z
> 
> 
> 
> Python (from CookBook):
> 
> from random import choice
> import string
> print ''.join([choice(string.letters+string.digits) for i in 
> range(1,8)])
> 
> !!generate password once :(
> 
> who can write this smaller or without 'import'?
> 

If you really want a hack, here it is:

while 1:print 
''.join(__import__('random').choice(__import__('string').letters+'1234567890') 
for x in xrange(8)),;n=raw_input()

This is a one-liner (though mail transmission may split it up), no 
import statements. If someone can come up with an even smaller version, 
feel free to post. :)

-- Stargaming


From jeremy+complangpython at jeremysanders.net  Fri Jan 19 15:00:54 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Fri, 19 Jan 2007 20:00:54 +0000
Subject: when format strings attack
References: <1169207467.989977.162940@q2g2000cwa.googlegroups.com>
	<pan.2007.01.19.19.06.43.598000@REMOVE.THIS.cybersource.com.au>
Message-ID: <eor81m$fuu$1@gemini.csx.cam.ac.uk>

Steven D'Aprano wrote:
 
> os.system('dir -l %s' % 'text.txt')
> 
> 
> Now, there is a security risk: you might set command1 yourself, and
> allow the user to set args. If command1 is an external application
> with a security hole, and the user provides arguments that trigger that
> bug, then naturally your application will inherit whatever security
> vulnerabilities the external application suffers from. No surprises there.

There are also big risks like this

filename = 'foo; rm importantfile'
cmd = 'ls %s' % filename
os.system(cmd)

oops!

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From jura.grozni at gmail.com  Tue Jan 16 12:07:50 2007
From: jura.grozni at gmail.com (azrael)
Date: 16 Jan 2007 09:07:50 -0800
Subject: help needed for pymorph
In-Reply-To: <1168963625.800116.231490@a75g2000cwd.googlegroups.com>
References: <1168963625.800116.231490@a75g2000cwd.googlegroups.com>
Message-ID: <1168967269.727462.230290@51g2000cwl.googlegroups.com>

here is the traceback

http://barok.foi.hr/~ikljaic/untitled.jpg



From roland.hedberg at adm.umu.se  Wed Jan  3 06:09:11 2007
From: roland.hedberg at adm.umu.se (Roland Hedberg)
Date: Wed, 03 Jan 2007 12:09:11 +0100
Subject: import order or cross import
In-Reply-To: <Xns98AD6F4382DA5duncanbooth@127.0.0.1>
References: <mailman.2236.1167814387.32031.python-list@python.org>
	<Xns98AD6F4382DA5duncanbooth@127.0.0.1>
Message-ID: <459B8ED7.4090306@adm.umu.se>

Duncan Booth wrote:

> 
> Remember that all statements in Python are executed at the time they are 
> encountered: there are no declarations (apart from 'global') so no looking 
> ahead to see what classes or functions are coming up.

Yes, I've seen this time and time again.

> One other complication in your particular instance: when you run a ONE.py 
> as a script the script is loaded in a module called '__main__', so 'import 
> ONE' will actually load a separate module which is NOT the same as the 
> __main__ module. Likewise when you run TWO.py as a script you have three 
> modules __main__ (loaded from TWO.py), ONE, and TWO.

Hmm, that's interesting.

> 
> The fix in this sort of case is usually to extract the base class out to a 
> third module. If you put BaseColor in base.py then you can safely import 
> that anywhere you want it.

OK, so I'll go for this option. Takes some more intelligence in the
marshalling code but it should be doable.

> An alternative in this case would be to edit ONE.py and move the line 
> 'import TWO' down below the definition of BaseColor: nothing before that 
> actually requires TWO to have been imported yet.

Since no person is involved, in creating files like ONE.py and TWO.py,
this also has to be done by the marshalling code.
I've no clear idea which alternative would be best/easiest but your
first one seems clearer.

> However, you really should try to separate scripts from modules otherwise 
> the double use as both __main__ and a named module is going to come back 
> and bite you.

Oh, that was only there as an example, so you could see the intent usage.

Thanks Duncan!

-- Roland


From jura.grozni at gmail.com  Tue Jan 16 13:14:31 2007
From: jura.grozni at gmail.com (azrael)
Date: 16 Jan 2007 10:14:31 -0800
Subject: help needed for pymorph
In-Reply-To: <Ip8rh.15195$X72.5896@newsread3.news.pas.earthlink.net>
References: <1168963625.800116.231490@a75g2000cwd.googlegroups.com>
	<Ip8rh.15195$X72.5896@newsread3.news.pas.earthlink.net>
Message-ID: <1168971270.440015.176640@51g2000cwl.googlegroups.com>

yes, in the PIL directory




Dennis Lee Bieber je napisao/la:
> On 16 Jan 2007 08:07:09 -0800, "azrael" <jura.grozni at gmail.com>
> declaimed the following in comp.lang.python:
>
>
> >
> > does anyone have any idea how to fix it.
> >
> 	Well, the last line of your traceback indicates that the error is
> somewhere in the PIL libraries -- do you have a _imagingtk.pyd file?
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/



From ljz at asfast.com  Thu Jan 11 05:48:47 2007
From: ljz at asfast.com (Lloyd Zusman)
Date: Thu, 11 Jan 2007 05:48:47 -0500
Subject: Joining threads but allowing signals to main thread?
References: <87irfeawrj.fsf@asfast.com>
	<7.0.1.0.0.20070111040620.058d6cc0@yahoo.com.ar>
Message-ID: <87wt3thm9c.fsf@asfast.com>

Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:

> At Thursday 11/1/2007 03:43, Lloyd Zusman wrote:
>
>>   while threading.activeCount() > 1:
>>       time.sleep(0.001)
>>
>>   sys.exit(0)
>>
>>Is there any way to allow my program to respond to signals without
>>having to busy-wait in the main thread?
>
> Don't worry too much, this is *not* a busy wait, because you use
> sleep. You can use a longer sleep, it will be terminated by any
> signal. But not too long, or the check for activeCount() will be delayed
> in excess. (I use sleep(1) usually but your needs may be different)

Well, if this is the best that we can currently do in python, then so be
it.

My sincere thanks.


-- 
 Lloyd Zusman
 ljz at asfast.com
 God bless you.



From thn at mail.utexas.edu  Sun Jan 28 16:21:31 2007
From: thn at mail.utexas.edu (Thomas Nelson)
Date: 28 Jan 2007 13:21:31 -0800
Subject: Trouble with max() and __cmp__()
In-Reply-To: <slrnerq4ek.56n.wojciech_mula@cat.tac>
References: <1170017167.165222.325800@a34g2000cwb.googlegroups.com>
	<slrnerq4ek.56n.wojciech_mula@cat.tac>
Message-ID: <1170019291.084041.150780@h3g2000cwc.googlegroups.com>



On Jan 28, 3:13?pm, Wojciech Mu?a 
<wojciech_m... at poczta.null.onet.pl.invalid> wrote:
>Define method __gt__.

This works, thanks.  I was a little surprised though. is __cmp__ used 
by any builtin functions?

Thanks,
THN



From http  Mon Jan  8 04:35:08 2007
From: http (Paul Rubin)
Date: 08 Jan 2007 01:35:08 -0800
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
	<7xd55rzke9.fsf@ruckus.brouhaha.com>
	<slrneq2055.tcj.grahn+nntp@frailea.sa.invalid>
	<mailman.2388.1168181437.32031.python-list@python.org>
	<7x3b6mzwkl.fsf@ruckus.brouhaha.com>
	<1168189375.843789.306180@51g2000cwl.googlegroups.com>
	<7xps9q19wf.fsf@ruckus.brouhaha.com>
	<1168248244.134804.138050@51g2000cwl.googlegroups.com>
Message-ID: <7xslelq2sz.fsf@ruckus.brouhaha.com>

"Paul Boddie" <paul at boddie.org.uk> writes:
> Has this ever been reported as a bug in Python? I could imagine more
> sophisticated "name mangling": something to do with the identity of the
> class might be sufficient, although that would make the tolerated
> "subversive" access to private attributes rather difficult.

If you mean the object id, I don't think you can use it for name
mangling, since the mangled names have to survive code marshalling
and you may end up with different object id's.

I've just never encountered any legitimate use for the "subversive"
access and if it's really necessary, it's better to do it through some
kind of well-designed reflection interface in the class, rather than
with a crock like name mangling.


From gherron at digipen.edu  Mon Jan 22 18:46:21 2007
From: gherron at digipen.edu (Gary Herron)
Date: Mon, 22 Jan 2007 15:46:21 -0800
Subject: How to get self reference from within a module?
In-Reply-To: <3ca9bbe50701221526p4bb7cffdx767d6737bed0a6a2@mail.gmail.com>
References: <3ca9bbe50701221526p4bb7cffdx767d6737bed0a6a2@mail.gmail.com>
Message-ID: <45B54CCD.5000701@digipen.edu>

Lavoie ?rick wrote:
> Hi,
>
>  i would like to now how to get a self reference from within a 
> module.  The goal is to be able to generate a list of all declared 
> function within the module.
>
> Thanks,
>
> Erick
I think this is what you're asking for:

If you import a module, say

  import sys

then sys is an object you can refer to.  Like man objects in Python, you 
can do some ,so called, introspection.  For instance you can ask for the 
list of all the attributes (function, classes, and such) with the vars 
builtin

  print vars(sys)

That yields a dictionary of all objects in the module, from which you 
can access and iterate through the names (keys) and values.

If you want more capabilities, you should also look at the inspect module.

Gary Herron



-- 
Gary Herron, PhD.
Department of Computer Science
DigiPen Institute of Technology
(425) 895-4418




From bbands at gmail.com  Fri Jan 26 12:54:02 2007
From: bbands at gmail.com (BBands)
Date: 26 Jan 2007 09:54:02 -0800
Subject: time series data and NumPy
In-Reply-To: <51us3uF1mdcpsU1@mid.uni-berlin.de>
References: <1169830757.220964.196540@m58g2000cwm.googlegroups.com>
	<51us3uF1mdcpsU1@mid.uni-berlin.de>
Message-ID: <1169834042.396351.12660@h3g2000cwc.googlegroups.com>

On Jan 26, 9:29 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:

> What you could do would be to convert the date-column into a timestamp,
> which is a int/long, and use that. Would that help?

Actually that might help, as all I need the date for is to index
values.

Thanks, I'll give it a spin.

     jab



From max at alcyone.com  Tue Jan 23 15:02:40 2007
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 23 Jan 2007 12:02:40 -0800
Subject: Overloading assignment operator
In-Reply-To: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
References: <45b652fa$0$27614$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <ibSdnRWgfeZ99CvYnZ2dnUVZ_tLinZ2d@speakeasy.net>

Achim Domma wrote:

> I want to use Python to script some formulas in my application. The user 
> should be able to write something like
> 
> A = B * C
> 
> where A,B,C are instances of some wrapper classes. Overloading * is no 
> problem but I cannot overload the assignment of A. I understand that 
> this is due to the nature of Python, but is there a trick to work around 
> this?
> All I'm interested in is a clean syntax to script my app. Any ideas are 
> very welcome.

Are you sure you even need to do that?

 >>> class C:
...  def __init__(self, x):
...   self.x = x
...  def __mul__(self, other):
...   return C(self.x*other.x)
...
 >>> result = C(2)*C(3)
 >>> print result
<__main__.C instance at 0x402e13ec>
 >>> result.x
6

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Life is something to do when you can't get to sleep.
    -- Fran Lebowitz


From greg at cosc.canterbury.ac.nz  Sat Jan 27 20:18:50 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sun, 28 Jan 2007 14:18:50 +1300
Subject: ANN: Plex 1.1.5 (Repost)
In-Reply-To: <mailman.3232.1169916877.32031.python-announce-list@python.org>
References: <mailman.3232.1169916877.32031.python-announce-list@python.org>
Message-ID: <mailman.3239.1169960981.32031.python-announce-list@python.org>

(Reposting to supply the URL that I forgot to include.:-()

I have released a small update to Plex to fix the
problem of assignment to None causing syntax warnings
or errors in Python 2.3 and later.

http://www.cosc.canterbury.ac.nz/greg.ewing/python/Plex

What is Plex?

Plex is a Python module for lexical analysis that
provides similar functionality to Lex and Flex.

-- 
Greg


From risomt at gmail.com  Wed Jan 31 02:23:55 2007
From: risomt at gmail.com (risomt at gmail.com)
Date: 30 Jan 2007 23:23:55 -0800
Subject: PY Zip
In-Reply-To: <1170220732.552072.163560@k78g2000cwa.googlegroups.com>
References: <1170220732.552072.163560@k78g2000cwa.googlegroups.com>
Message-ID: <1170228235.788320.136370@m58g2000cwm.googlegroups.com>

On Jan 31, 12:18 am, "GISDude" <gisdudes... at gmail.com> wrote:
> Hi all.
>
> I am trying to find a module that has a Zip utility that I can use in
> Python. I would like to be able to call the module and ZIP up a
> directory. I thought there was such a module, but I have not been able
> to find it.
>
> I need this to be able to be used in Python Win. Is there a ZIP utilty
> already stored with a basic PYTHON download?
>
> Thanks all.

the module is named "zipfile" (http://docs.python.org/lib/module-
zipfile.html)

http://docs.python.org/lib/zipfile-objects.html#zipfile-objects has
more indepth information on all functions

I can't say i've ever used it, but it seems pretty straightforward and
mostly reminiscent of the basic read/write file modules.



From gagsl-py at yahoo.com.ar  Mon Jan 29 23:54:53 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 30 Jan 2007 01:54:53 -0300
Subject: deepcopy alternative?
References: <45be808e$0$27074$4c368faf@roadrunner.com>
Message-ID: <op.tmxx1xqxsd1mbx@gabriel2.softlabbsas.com.ar>

En Mon, 29 Jan 2007 20:17:11 -0300, <"none <"@bag.python.org> escribi?:

> I have a very complex data structure which is basically a class object
> containing (sometimes many) other class objects,

What are "class objects"? instances of a given class, or a class itself?

> function references,
> ints, floats, etc.  The man for the copy module states pretty clearly
> that it will not copy methods or functions. I've looked around for a
> while (prob just using the wrong keywords) and haven't found a good
> solution.  As a workaround I've been using cPickle, loads(dumps(obj))
> which is incredibly slow (~8 sec for a 1000 elem list).
>
> I believe the only thing stopping me from doing a deepcopy is the
> function references, but I'm not sure.  If so is there any way to
> transform a string into a function reference(w/o eval or exec)?

What do you mean by "function reference"? A module-level function works  
fine both with pickle and copy. Methods do not; but it's not common to  
take methods out of a class and put them inside a tuple, by example...

>
> Example
> from copy import deepcopy
> a = ClassObj([ClassObj([3.2, 'str', funcRef]), 4, ClassObj[funcRef])
> b = deepcopy(a)
> TypeError: function() takes at least 2 arguments (0 given)

Please provide a *running* example. I've added some definitions, corrected  
some syntax errors, and this full example works for me:

--- cut ---
 from copy import deepcopy

class ClassObj(object):
   def __init__(self, args):
     self.data = args

def funcRef(x):
     print x

a = ClassObj([ClassObj([3.2, 'str', funcRef]), 4, ClassObj([funcRef])])
b = deepcopy(a)
print a is b
a.data.append('hello')
print len(a.data), len(b.data)
--- cut ---

> PS: If the answer to this is in __getstate__() or __setstate__() is
> there some reference to how these should be implemented besides the
> library reference?

Until you provide more info on your problem it's hard to tell.


-- 
Gabriel Genellina



From vgvr620034 at gmail.com  Thu Jan 11 23:48:19 2007
From: vgvr620034 at gmail.com (raghu)
Date: 11 Jan 2007 20:48:19 -0800
Subject: Explanation about for loop
Message-ID: <1168577299.485773.8160@q2g2000cwa.googlegroups.com>

can any one help me explaining for loop and its execution and its
syntax with a simple example.



From gagsl-py at yahoo.com.ar  Mon Jan 15 18:00:24 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 15 Jan 2007 20:00:24 -0300
Subject: whats wrong with my reg expression ?
In-Reply-To: <ef60af090701151441j2dbc2308ka8f326a181b6bba8@mail.gmail.co
 m>
References: <ef60af090701151441j2dbc2308ka8f326a181b6bba8@mail.gmail.com>
Message-ID: <7.0.1.0.0.20070115195902.05c75aa0@yahoo.com.ar>

At Monday 15/1/2007 19:41, Gert Cuykens wrote:

>rex2=re.compile('^"(?P<value>[^]*)"$',re.M)

[^set-of-forbidden-characters]


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From basschulte at gmail.com  Wed Jan 31 14:49:14 2007
From: basschulte at gmail.com (Bas-i)
Date: 31 Jan 2007 11:49:14 -0800
Subject: emulate a serial port in windows (create a virtual 'com' port)
In-Reply-To: <JFBvh.316977$TU3.6290485@phobos.telenet-ops.be>
References: <JFBvh.316977$TU3.6290485@phobos.telenet-ops.be>
Message-ID: <1170272954.367718.275310@l53g2000cwa.googlegroups.com>

On Jan 30, 7:34 am, Pom <r... at group.invalid> wrote:

> how can I emulate a serial port in windows?

Google for ComEmulDrv3

This may do what you want.



From nogradi at gmail.com  Tue Jan 23 05:25:06 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Tue, 23 Jan 2007 11:25:06 +0100
Subject: Noob Question: Force input to be int?
In-Reply-To: <1169546377.017596.43840@k78g2000cwa.googlegroups.com>
References: <1169546377.017596.43840@k78g2000cwa.googlegroups.com>
Message-ID: <5f56302b0701230225x4da5ac21r33393668ed4bf312@mail.gmail.com>

> I have a piece of code that looks like this:
>
> if len(BuildList) > 0:
>     print "The script found %d game directories:" % len(BuildList)
>     print
>     num = 0
>     for i in BuildList:
>         print str(num) +"       " + i
>         num = num + 1
>     print
>     print "Select a build number from 0 to " + str(len(BuildList) - 1)
>     buildNum = int(raw_input('Select build #> '))
>
>     while buildNum > (len(BuildList) -1) or buildNum <= -1:
>         print
>         print "Error: Invalid build number!"
>         print "Select a build number from 0 to " + str(len(BuildList) -
> 1)
>         print
>         buildNum = int(raw_input('Select build: '))
>
> The problem is with the while buildNum-loop. If the user enters a
> non-numeric value in the buildNum input, the scripts throws an
> exception. I need to constrict the user to ONLY use integers in the
> input box. How can I solve this issue?


How about this:

while True:
    try:
        x = int( raw_input( 'Enter an integer: ' ) )
        break
    except:
        pass

print 'Okay, now I have this integer: %d' % x


HTH,
Daniel


From michael at mustun.ch  Sun Jan  7 18:23:38 2007
From: michael at mustun.ch (Michael M.)
Date: Mon, 08 Jan 2007 00:23:38 +0100
Subject: how to find the longst element list of lists
In-Reply-To: <45a169f0$0$309$426a34cc@news.free.fr>
References: <Vwdoh.223$L06.180@nntpserver.swip.net>
	<45a169f0$0$309$426a34cc@news.free.fr>
Message-ID: <Ehfoh.237$L06.186@nntpserver.swip.net>

Bruno Desthuilliers wrote:

> 
> Err... this makes three distinct lists, not a list of lists.
> 

Sure. Logically spoken. Not in Python code. Or a number of lists.
Sure not [[ bla... ] [bla.]] etc.


From bearophileHUGS at lycos.com  Fri Jan 19 15:29:38 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 19 Jan 2007 12:29:38 -0800
Subject: Iterator length
In-Reply-To: <pan.2007.01.19.16.03.03.405251@REMOVE.THIS.cybersource.com.au>
References: <1169162762.997894.180320@q2g2000cwa.googlegroups.com>
	<1169167258.553202.190130@m58g2000cwm.googlegroups.com>
	<1169168139.350836.79790@s34g2000cwa.googlegroups.com>
	<pan.2007.01.19.11.36.29.99822@REMOVE.THIS.cybersource.com.au>
	<1169211840.951796.87080@q2g2000cwa.googlegroups.com>
	<pan.2007.01.19.16.03.03.405251@REMOVE.THIS.cybersource.com.au>
Message-ID: <1169238578.595673.307650@l53g2000cwa.googlegroups.com>

Steven D'Aprano:
> since g is not an arbitrary iterator, one can easily do this:
> print [(h,len(list(g))) for h,g in groupby(s)]
> No need for a special function.

If you look at my first post you can see that I have shown that
solution too, but it creates a list that may be long, that may use a
lot of of memory, and then throws it away each time. I think that's a
bad solution. It goes against the phylosophy of iterators too, they are
things created to avoid managing true lists of items too.


> If you, the iterator
> creator, know enough about the iterator to be sure it has a predictable
> length, you know how to calculate it.

I don't agree, sometimes I know I have a finite iterator, but I may
ignore how many elements it gives (and sometimes they may be a lot).
See the simple example with the groupby.

Bye,
bearophile



From wise at hyperformix.com  Thu Jan 11 18:35:27 2007
From: wise at hyperformix.com (Tim Wise)
Date: Thu, 11 Jan 2007 17:35:27 -0600
Subject: py2exe: zipfile=None raised ImportError
Message-ID: <E8989E008771A54F94F5A4A76799640201FD2C5B@exchange.hyperformix.com>

I clean before a compile.

The exe contains all the modules (pyc) listed in the trace back message
(linecache, zipextimporter, and optparse), except boot_common.py. Should
that be in the exe?

I'm trying to build on Windows XP using Python 2.4.4 and py2exe 0.6.5

Thanks.
--
Tim Wise

-----Original Message-----
From: Thomas Heller [mailto:theller at ctypes.org] 
Sent: Thursday, January 11, 2007 2:13 PM
To: Tim Wise
Cc: python-list at python.org
Subject: Re: py2exe: zipfile=None raised ImportError

(I forgot to copy the list ;-)

Tim schrieb:
> > I'm at the end of my limited experience...
> > 
> > I'm using py2exe to create an executable. I'm using bundle level 1.
> > When I don't use the zipfile option, the executable and library.zip
get
> > created and the executable works correctly.
> > 
> > When I add the zipfile=None option to put everything into the exe,
the
> > exe doesn't work. It raises an ImportError whose traceback is:
> > 
> > File "c:\Python24\...\py2exe\boot_common.py" ... no module name
linecache
> > File "<install zipextimporter> ... no module named zipextimporter
> > File "my.py" ... no module name optparse
> > 
> > It looks like the imported modules are not being found in the zip,
or
> > something didn't get included that needed to be included.
> > 
> > Does anybody know what's happening and how to fix it?

I have don't know if this helps or not, but you should better clean
everything
(remove the build and the dist subdirectories) when you are changing the
options in the
setup script and 'recompile'.

Another tip:  You can examine what is in the zipfile, or the exe (if
using
zipfile=None) when you rename the file to a *.zip file, and open it with
winzip or another archiver.

Thomas




From gagsl-py at yahoo.com.ar  Thu Jan 11 23:09:45 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 12 Jan 2007 01:09:45 -0300
Subject: Python nuube needs Unicode help
In-Reply-To: <1168558927.031778.240940@i56g2000hsf.googlegroups.com>
References: <1168550858.233814.292900@p59g2000hsd.googlegroups.com>
	<50nv1uF1hje7oU1@mid.uni-berlin.de>
	<1168558927.031778.240940@i56g2000hsf.googlegroups.com>
Message-ID: <7.0.1.0.0.20070112010621.0597d950@yahoo.com.ar>

At Thursday 11/1/2007 20:42, gheissenberger at gmail.com wrote:

>   Progress! You managed to change the error message.
>
>   File "./acc_test_script_generator.py", line 106, in loadData
>     print u.encode('utf-8')
>AttributeError: Utterance instance has no attribute 'encode'
>
>I'm missing somethign really obvious here, but I don't know what it
>is...

Then you're not "printing a line from a file we are parsing", which 
should be a string or unicode object. You're printing some 
"Utterance" instance; probably it has a __str__ method, and there, 
you're mixing unicode+strings.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From adonis at REMOVETHISearthlink.net  Sun Jan 28 22:19:53 2007
From: adonis at REMOVETHISearthlink.net (Adonis Vargas)
Date: Mon, 29 Jan 2007 03:19:53 GMT
Subject: Ip address
In-Reply-To: <mailman.3244.1169978684.32031.python-list@python.org>
References: <mailman.3244.1169978684.32031.python-list@python.org>
Message-ID: <tJdvh.15747$pQ3.4990@newsread4.news.pas.earthlink.net>

Scripter47 wrote:
> How do i get my ip address?
> 
> in cmd.exe i just type "ipconfig" then it prints:
>      ...
>      IP-address . . . . . . . . . . . . . . . . . : 192.168.1.10
>      ...
> how can i do that in python??
> 

If you want to get your external IP you can do:

import urllib

checkIP = urllib.urlopen("http://checkip.dyndns.org").read()
externalIP = checkIP.split()[-1].strip("</body></html>")
print externalIP

Hope this helps.

Adonis


From gandalf at designaproduct.biz  Fri Jan  5 12:01:38 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Fri, 05 Jan 2007 18:01:38 +0100
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>
Message-ID: <459E8472.4010000@designaproduct.biz>

W. Watson wrote:
> What do I download to use Python with MX XP Pro on an ASUS 4 year old 
> motherboard? I would guess a good book source for starters would be the 
> O'Reilly book.
>   
You mean Microsoft XP Pro?

For a beginner, the motherboard does not really matter. First of all, 
you should download Python itself:

http://www.python.org/download/

or more probably:

http://www.python.org/ftp/python/2.5/python-2.5.msi

Then you should download a good editor. There are many, listed here: 
http://wiki.python.org/moin/PythonEditors
Under Windows, for a beginner, I would recommend pythonwin, but you can 
decide.

Finally, you can start practicing. A book is always good. You can read 
online tutorials too:

http://docs.python.org/tut/
http://www.awaretek.com/tutorials.html


Regards,

  Laszlo



From wolf_tracks at invalid.com  Wed Jan 24 16:02:54 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Wed, 24 Jan 2007 21:02:54 GMT
Subject: Python Windows Editors
In-Reply-To: <pan.2007.01.24.19.47.25.813947@web.de>
References: <p5Qsh.51413$wc5.6534@newssvr25.news.prodigy.net>
	<1169415514.562496.248950@a75g2000cwd.googlegroups.com>
	<cDTsh.36657$Gr2.3763@newssvr21.news.prodigy.net>
	<pan.2007.01.24.19.47.25.813947@web.de>
Message-ID: <2QPth.66061$qO4.59545@newssvr13.news.prodigy.net>

Hertha Steck wrote:
> Am Mon, 22 Jan 2007 00:33:12 +0000 schrieb W. Watson:
> 
>> mensanator at aol.com wrote:
>>> W. Watson wrote:
>>>> I downloaded python-2.5.msi and installed it. I believe its editor is IDE. I
>>>> understand there's a Win editor called pythonwin. I believe it's in the
>>>> download pywin32-210.win32-py2.5.exe, but I'm not sure if this exe file has
>>>> just the editor or all of Python. Comments? If not how do I get the
>>>> PythonWin editor by itself?
> 
> By "IDE" you mean IDLE, don't you?
> 
>>> Print your files from Notepad, after all, they're just text files.
>>> But IDLE has more usefull Formatting options.
>> Thanks. Already did it, but used Word. I can get line numbers in that way.
> 
> And you are absolutely certain you won't never, ever, detect a typo when
> you have your script open in Word, correct it, save the file and try to
> use the resulting mess as a Python script? Or does Word leave it as a text
> file in such a case? I never dare to open source code in Word, so I'm not
> really sure.
> 
> Hertha
> 
Yes, looking at it again, it's IDLE in my Start (Programs) menu. When I put 
it into Word, I print the document with line #s and then mark up the 
listing. I never try to use a Word doc in Python.


          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

          "Depend upon it, there is nothing so unnatural as the
           commonplace." -- Sherlock Holmes, in "A Case of Identity"
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From gagsl-py at yahoo.com.ar  Fri Jan  5 06:08:57 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 05 Jan 2007 08:08:57 -0300
Subject: Memoization in Python
In-Reply-To: <ibpnh.230$TE4.85@news02.roc.ny>
References: <ibpnh.230$TE4.85@news02.roc.ny>
Message-ID: <7.0.1.0.0.20070105074253.03abd3c8@yahoo.com.ar>

At Friday 5/1/2007 06:50, Alec Mihailovs wrote:

>Following Antti Karttunen suggestion, I wrote the following simple decorator
>for creating functions with cache (something like 'option remember' in
>Maple). Just wanted to share it:

Nice. There is already a memoize decorator in the Python wiki: 
http://wiki.python.org/moin/PythonDecoratorLibrary, you can get some 
ideas from there. Using the functools module (2.5) or the decorator 
module by M. Simoniato 
(http://www.phyast.pitt.edu/~micheles/python/documentation.html) you 
can improve it so the decorated function looks more like the original.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From jtravs at gmail.com  Wed Jan 10 03:36:26 2007
From: jtravs at gmail.com (jtravs at gmail.com)
Date: 10 Jan 2007 00:36:26 -0800
Subject: distutils and ctypes
In-Reply-To: <45A48ACE.9000404@v.loewis.de>
References: <1168368375.380664.100460@i56g2000hsf.googlegroups.com>
	<45A3FF17.2070509@v.loewis.de>
	<mailman.2497.1168377134.32031.python-list@python.org>
	<45a41b1f$0$19653$9b622d9e@news.freenet.de>
	<mailman.2504.1168386142.32031.python-list@python.org>
	<45A48ACE.9000404@v.loewis.de>
Message-ID: <1168418186.490383.148470@p59g2000hsd.googlegroups.com>


Martin v. L?wis wrote:
> Robert Kern schrieb:
> > To which I say that doing the type-checking and error handling is much easier in
> > Python than using the C API. Add to that the tediousness of the edit-compile-run
> > cycle of C and the finickiness of refcounting.
>
> Sure: edit-compile-run is tedious, but in the given case, it is
> necessary anyway. Also, refcounting is finicky, but with ctypes,
> you often have to use just as finicky memory management APIs.
> (such as using specific allocation and deallocation routines,
> or having to do memory management at all when in C you would
> do stack allocation).
>
> My main concern with ctypes is that you have to duplicate
> information from the header files, which is error-prone,
> especially when the header files may change (either across
> versions or across target systems).
>

I have looked at: building an extension module, using pyrex and using
ctypes. Initially ctypes won because I was under the impression that to
use pyrex or build an extension module required the same compiler as
python was compiled with. This is not a problem on linux, but under
windows this is much too great a problem for potential users (who will
also need to compile the module). I now have discovered that I can use
mingw32 (without patching) under windows (with python2.5) though I'm
not clear if this is by chance or has been implemented as a new feature
(can't find suitable documentation).

Anyway, at this point I think I will stick with ctypes purely out of
simplicity. My c library is for some legacy lab hardware control. I
only need to call three functions. With ctypes, I can check the data in
python (which I do anyway to validate it) and pass it onto the library
in about 10 lines of code. Writing an extension module I believe would
be much more difficult.

Anyway,
Thanks both for your help.
John



From gagsl-py at yahoo.com.ar  Fri Jan 26 13:56:17 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 26 Jan 2007 15:56:17 -0300
Subject: how to remove c++ comments from a cpp file?
References: <1169801197.941449.303000@v33g2000cwv.googlegroups.com><mailman.3190.1169802638.32031.python-list@python.org><1169805244.879280.235660@v45g2000cwv.googlegroups.com><mailman.3191.1169807705.32031.python-list@python.org><45ba1cfe$0$5084$ba4acef3@news.orange.fr>
	<epd751$518$03$1@news.t-online.com>
Message-ID: <epeegh$i52$1@sea.gmane.org>

"Peter Otten" <__peter__ at web.de> escribi? en el mensaje 
news:epd751$518$03$1 at news.t-online.com...
> Laurent Rahuel wrote:
>
>> And using the codecs module
>
> Why would you de/encode at all?

I'd say the otherwise: why not? This is the recommended practice: decode 
inputs as soon as possible, work on Unicode, encode only when you write the 
output.
In this particular case, it's not necesary and you get the same results, 
only because these two conditions are met:

- the encoding used is utf-8
- we're looking for '//', and no unicode character contains '/' in its 
representation using that encoding apart from '/' itself

Looking for the byte sequence '//' into data encoded with a different 
encoding (like utf-16 or ucs-2) could give false positives. And looking for 
other things (like '??') on utf-8 could give false positives too.
The same applies if one wants to skip string literals looking for '"' and 
'\\"'.
Anyway for a toy script like this, perhaps it does not make any sense at 
all - but one should be aware of the potential problems.

-- 
Gabriel Genellina 




From ptmcg at austin.rr.com  Sat Jan 27 14:26:46 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 27 Jan 2007 11:26:46 -0800
Subject: extracting from web pages but got disordered words sometimes
In-Reply-To: <1169896727.567159.239160@a34g2000cwb.googlegroups.com>
References: <1169896727.567159.239160@a34g2000cwb.googlegroups.com>
Message-ID: <1169926006.739252.57360@p10g2000cwp.googlegroups.com>


After looking at the pyparsing results, I think I see the problem with 
your original code.  You are selecting only the characters after the 
rightmost "-" character, but you really want to select everything to 
the right of "- -".  In some of the titles, the encoded Chinese 
includes a "-" character, so you are chopping off everything before 
that.

Try changing your code to:
    title=full_title.split("- -")[1]

I think then your original program will work.

-- Paul



From jonc at icicled.net  Thu Jan 18 13:58:04 2007
From: jonc at icicled.net (Jonathan Curran)
Date: Thu, 18 Jan 2007 12:58:04 -0600
Subject: spidering script
In-Reply-To: <8N6dnSE2eO6QKDLYnZ2dnUVZ_uejnZ2d@fdn.com>
References: <8N6dnSE2eO6QKDLYnZ2dnUVZ_uejnZ2d@fdn.com>
Message-ID: <200701181258.04264.jonc@icicled.net>

On Thursday 18 January 2007 11:57, David Waizer wrote:
> Hello..
>
> I'm  looking for a script (perl, python, sh...)or program (such as wget)
> that will help me get a list of ALL the links on a website.
>
> For example ./magicscript.pl www.yahoo.com and outputs it to a file, it
> would be kind of like a spidering software..
>
> Any suggestions would be appreciated.
>
> David

David, this is a touchy topic but whatever :P Look into sgmllib, and you can 
filter on the "A" tag. The book 'Dive Into Python' covers it quite nicely: 
http://www.diveintopython.org/html_processing/index.html

Jonathan


From john.pye at gmail.com  Thu Jan 25 18:53:27 2007
From: john.pye at gmail.com (John Pye)
Date: 25 Jan 2007 15:53:27 -0800
Subject: Catching floating point errors from linked C code
In-Reply-To: <XSXth.26940$sR.20213@newssvr29.news.prodigy.net>
References: <1169696243.262973.188540@s48g2000cws.googlegroups.com>
	<PzWth.22651$yC5.11156@newssvr27.news.prodigy.net>
	<1169702669.027065.65990@v33g2000cwv.googlegroups.com>
	<XSXth.26940$sR.20213@newssvr29.news.prodigy.net>
Message-ID: <1169769207.261208.241560@a34g2000cwb.googlegroups.com>

Hi John

I think you're right, and I need to place FPE 'brackets' around my
code.

The thing that was confusing me was that python has division by zero
exceptions (for which I assumed fenv.h was being used), but when from
python I reach down into my SWIG code and do a 1/0, no SIGFPE is
thrown.

I will experiment with the _controlfp stuff (and linux equivs) and see
how it goes. Thanks for your help.

Cheers
JP


On Jan 25, 5:12 pm, John Nagle <n... at animats.com> wrote:
> John Pye wrote:
> > Hi John,
>
> > On Jan 25, 3:43 pm, John Nagle <n... at animats.com> wrote:
>
> >>Python is probably running with floating point exceptions disabled,
> >>but you can enable them in your C code, and restoring the floating
> >>point mode when you leave, if you want.  This is probably
> >>only worth doing under a debugger, because otherwise you just end
> >>up with an aborted instance of Python.
>
> > So as far as you know, Python doesn't switch stuff like
> > feenableexcept(FE_EXCEPT_ALL)? Does Python use the <signal.h>
> > internally, or are all its FPEs detected by explicit checks beforehand?    I have no idea what state Python leaves the FPU in, but whatever
> the state is, you can read it, set your own state, and restore
> the previous state before returning to Python.
>
>     The last time I had to do this, I used
>
>         unsigned int oldstate =         // make almost all FPU errors fatal
>                 _controlfp ((~_EM_INVALID) & _CW_DEFAULT, _MCW_EM);
>         ...
>         _controlfp(oldstate);           // restore old state
>
> on Windows 2000.
> 
>                                         John Nagle



From Barry.Carroll at psc.com  Thu Jan 25 13:41:44 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Thu, 25 Jan 2007 10:41:44 -0800
Subject: Overloading assignment operator
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595AA6@eugsrv400.psc.pscnet.com>

> -----Original Message-----
> From: Gabriel Genellina [mailto:gagsl-py at yahoo.com.ar]
> Sent: Tuesday, January 23, 2007 9:24 PM
> To: python-list at python.org
> Subject: Re: Overloading assignment operator
> 
> "Carroll, Barry" <Barry.Carroll at psc.com> escribi? en el mensaje
> news:2BBAEE949D384D40A2B851287ADB6A4304595AA4 at eugsrv400.psc.pscnet.com...
> 
> > * ... the assignment operator is used to assign an
> > * object to a name in the current namespace... IOW, you cannot "overload
> > * the assignment operator."
> > (wesley chun)
> This is the key concept, if you want to be able to "see" assignments, you
> should work with a namespace (a dictionary is enough...)
> 
> > * result = property(get_result, set_ result, doc='result of operations')
> >
> > I have tested this using the admittedly simple-minded code snipped
> > below.
<<snip>>
> Notice that you can delete ALL those lines of code, leaving a bare:
> 
> class Aclass: passs
> 
> and you will get EXACTLY the same results. In this case -and this are not
> my
> words- properties are a waste of programmer time, processor time and disk
> space.
> Of course properties are very useful, but when you need to do something
> "more" than just storing and retrieving a single value.
> 
> --
> Gabriel Genellina
Greetings:

Gabriel is right, and my definitions of get_result and set_result were deficient.  Something like this would have been better:

* def get_result(self):
*    do_stuff_before_returning(self)
*    return self.__result
*
* def set_result (self, expression):
*    do_stuff_before_storing(self, expression)
*    self.__result = expression
*

Achim didn't go into the details of his result class(es), so I don't know what the do_stuff_* functions would actually do.  

Sorry for the omission.  

Regards,
 
Barry



From __peter__ at web.de  Thu Jan 18 02:46:32 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 18 Jan 2007 08:46:32 +0100
Subject: generate tuples from sequence
References: <1169037661.987259.106790@v45g2000cwv.googlegroups.com>
	<eol9ac$v3l$02$1@news.t-online.com> <KaCrh.1768$R76.979@trnddc05>
Message-ID: <eon8k9$39m$02$1@news.t-online.com>

Alan Isaac wrote:

> "Peter Otten" <__peter__ at web.de> wrote in message
> news:eol9ac$v3l$02$1 at news.t-online.com...
>> I like
>>
>> >>> items = range(9)
>> >>> N = 3
>> >>> zip(*[iter(items)]*N)
>> [(0, 1, 2), (3, 4, 5), (6, 7, 8)]
> 
> Except that it is considered implementation dependent:
> http://mail.python.org/pipermail/python-list/2005-February/307550.html

Use itertools.izip() then instead of zip(). I think that the occurence of
this idiom on the examples page counts as a blessing :-)

But still, to help my lack of fantasy -- what would a sane zip()
implementation look like that does not guarantee the above output?

Peter



From Jstone at 3web.com  Wed Jan 31 15:54:30 2007
From: Jstone at 3web.com (JoJo)
Date: Thu,  1 Feb 2007 04:54:30 +0800
Subject: How to sort using hash's key?
Message-ID: <1170276870.45c102069d9e6@webmail.3web.com>

Hello,

I want to sort a dict via its key,but I have no idea on how to do it.
Please help me,thanks.
---------------------------------------------------------------------------
3webXS HiSpeed Dial-up...surf up to 5x faster than regular dial-up alone... 
just $14.90/mo...visit www.get3web.com for details



From ian.inglis at gmail.com  Thu Jan 18 11:58:39 2007
From: ian.inglis at gmail.com (Cruelemort)
Date: 18 Jan 2007 08:58:39 -0800
Subject: Catching wx events
References: <1169129536.879657.113130@v45g2000cwv.googlegroups.com>
	<mailman.2872.1169133299.32031.python-list@python.org>
Message-ID: <1169139519.586990.219110@q2g2000cwa.googlegroups.com>


Chris Mellon wrote:

> On 18 Jan 2007 06:12:17 -0800, Cruelemort <ian.inglis at gmail.com> wrote:
> > Hello all,
> >
> > I am new to this group (and new to Python) and was hoping someone would
> > be able to help me with something, it is not so much a problem it is
> > more of a general interest query about something i have a solution too
> > but am not sure it is the correct one.
> >
> > I have a class that contains a string ID and a name, and a list
> > containing a few objects of this type, i need to loop through this list
> > and create a button for each object (with the name as the label) i have
> > done this with the following code -
> >
> >                 for chan in self._channellist:
> >                         channelbutton = wx.Button(self, id=-1,
> > label=chan.getName())
> >
> > channelbutton.Bind(wx.EVT_BUTTON,self._channelChanged)
> >
> > My question is this - in the _channelChanged method, how do i know
> > which button has been pressed when i enter the channel changed method,
> > and so how do i retrieve the appropriate object depending on which
> > button has been pressed?
> >
> > I have potentially solved this problem using the UserData property in a
> > sizer, i have added all the buttons to a sizer for display purposes and
> > so SizerItem objects have been created, i can then set the original
> > object to the UserData object by putting the following line of code in
> > the loop
> >
> >                         sizeritem =
> > self.topsizer.Add(channelbutton,0,wx.ALIGN_RIGHT, userData=chan)
> >
> > This way i can retrieve the item in the _channelChanged method with the
> > following -
> >
> >         def _channelChanged(self, event):
> >                 eventobj = event.GetEventObject()
> >                 chan = self.topsizer.GetItem(eventobj).GetUserData()
> >
> >
> > This works fine but by looking at the API it would appear the UserData
> > property is not really designed for this use ("userData - Allows an
> > extra object to be attached to the sizer item, for use in derived
> > classes when sizing information is more complex than the proportion and
> > flag will allow for").
> >
> > Another option would be to derive my own Button class and include the
> > object in there.
> >
> > Any advice on the best way to solve this problem would be appreciated.
> >
>
> Exactly how I would do it depends on the rest of the application. I
> would probably derive my own button - never be afraid to subclass.
>
> You could also generate the buttons IDs up front, and maintain a
> mapping between the IDs and the channels, like so:
>
> self.mapper = {}
> for channel in self.channels:
>     id = wx.NewId()
>     self.mapper[id] = channel
>     channelbutton = wx.Button(self, id=id, label=channel.getName())
>
>
> def channelChanged(self, event):
>     channel = self.mapper[event.Id]
>
>
> You could also use closures (lambdas or via a factory function) to
> bind the channel at the time you create the button:
>
> for channel in self.channels:
>     channelbutton = wx.Button(self, label=channel.getName())
>     self.Bind(wx.EVT_BUTTON, lambda event:
> self.channelChanged(channel), source=channelbutton)
>
> def channelChanged(self, channel):
>     print "Channel changed to ", channel.getName()

Two good ideas, i used the mapping system, works and seems like a
slightly more elegant way of doing things.

Many thanks!

Ian



From Bulkan at gmail.com  Tue Jan 16 07:07:50 2007
From: Bulkan at gmail.com (placid)
Date: 16 Jan 2007 04:07:50 -0800
Subject: Projects anyone?
Message-ID: <1168949268.618793.102890@l53g2000cwa.googlegroups.com>

Hi all,

I'm looking for anyone who is working on a project at the moment that
needs help (volunteer). The last project i worked on personally was
screen-scraping MySpace profiles (read more at the following link)

http://placid.programming.projects.googlepages.com/screen-scrapingmyspaceprofiles


but that didn't go all to well, so im kinda bored and need something to
do, with Python. So any suggestions anyone? 

Cheers



From __peter__ at web.de  Mon Jan 22 02:42:40 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 22 Jan 2007 08:42:40 +0100
Subject: class explorer for automating IE
References: <1169448532.869501.190530@v45g2000cwv.googlegroups.com>
	<1169449585.832667.325370@11g2000cwr.googlegroups.com>
Message-ID: <ep1pss$97i$02$1@news.t-online.com>

John wrote:

> Is there an analogue of IE Mechanize in python?

http://www.google.com/search?q=python%20mechanize&btnI=I%27m+Feeling+Lucky


From nobody at localhost.localdomain  Fri Jan 12 06:56:43 2007
From: nobody at localhost.localdomain (Steven Wayne)
Date: Fri, 12 Jan 2007 05:56:43 -0600
Subject: Learning Python book, new edition?
References: <mailman.2635.1168592793.32031.python-list@python.org>
	<slrneqepvc.c32.swayne@wayne.powernet>
	<pan.2007.01.12.11.44.32.250129@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrneqetrq.e7h.nobody@wayne.powernet>

On Fri, 12 Jan 2007 22:44:33 +1100, Steven D'Aprano
	<steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Fri, 12 Jan 2007 04:50:21 -0600, Steven Wayne wrote:
>
> [snip stupid disclaimer and response to it]
>
>> Unlawful how? You've already given permission for an "agent responsible
>> for delivering the message" to broadcast it around the world.
>> 
>> Sorry for the rant, but I'm an email admin and I've just been told about
>> the change to UK law.
>
> What change to UK law?

http://www.theregister.co.uk/2006/12/21/new_web_email_regulation/


Steven
-- 
 .''`.
: :'  :
`. `'`
  `-


From akhavr at kds.com.ua  Wed Jan 17 11:00:23 2007
From: akhavr at kds.com.ua (Andrey Khavryuchenko)
Date: Wed, 17 Jan 2007 18:00:23 +0200
Subject: Python Web Frameworks
References: <1169048071.353887.279160@q2g2000cwa.googlegroups.com>
Message-ID: <m3wt3l8wyw.fsf@netmaster.kds.com.ua>

Shortash,

"S" == Shortash  wrote:

 S> I want to build a Python web app but im not sure which one to go for. I
 S> prefer something like asp.Net , which would allow me to fully seperate
 S> the presentation layer from the logic. Please advise?

Django?  http://www.djangoproject.com

-- 
Andrey V Khavryuchenko            
Software Development Company http://www.kds.com.ua/


From ruan at jcmills.com  Wed Jan 31 12:09:21 2007
From: ruan at jcmills.com (Dongsheng Ruan)
Date: Wed, 31 Jan 2007 12:09:21 -0500
Subject: What is the dummy statement that do nothing in Python?
References: <epqhre$qtp$1@netnews.upenn.edu>
	<4ccf86300701310904s3d6c7aecscc31644cc84dade7@mail.gmail.com>
Message-ID: <008601c7455a$8d6f8e20$0300000a@HPLaptop>

Yes, that's just what I want.

Thanks!
  ----- Original Message ----- 
  From: Analog Kid 
  To: Dongsheng Ruan 
  Cc: python-list at python.org 
  Sent: Wednesday, January 31, 2007 12:04 PM
  Subject: Re: What is the dummy statement that do nothing in Python?


  hey dongsheng:
  not too sure what you are looking for ... but i guess a simple "pass" statement should do it ...

  if a > b: pass


  hth,
  -ajay

   
  On 1/31/07, Dongsheng Ruan <ruan at jcmills.com> wrote: 
    I remember that in python there is some kind of dummy statement that just
    holds space and does nothing. 

    I want it to hold the place after a something like if a>b: do nothing

    I can't just leave the space blank after if statement because there will be
    error message.

    Does anybody know what to insert there? 

    Thanks!


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




  -- 
  BBQ - "Spare (My) Ribs" being contemplated 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070131/46f48297/attachment.html>

From nagle at animats.com  Wed Jan 10 01:31:20 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 10 Jan 2007 06:31:20 GMT
Subject: Wierd M2Crypto bug - phony "peer did not return certificate" error
Message-ID: <YK%oh.17173$sR.6972@newssvr29.news.prodigy.net>

Here's a wierd problem:

I have a little test case for M2Crypto, which just opens up SSL connections to
web servers and reads their certificates.  This works fine.

But if I execute

     socket.setdefaulttimeout(5.0)

so that the sockets don't wait too long if there's no SSL server, I get
a "peer did not return certificate" exception every time.

Environment:
	Windows 2000 SP 4
	M2Crypto:	M2Crypto-0.17.win32-py2.4.exe
	Python:		Python 2.4.4 (#71, Oct 18 2006, 08:34:43)
	OpenSSL:	Win32 OpenSSL v0.9.8d

Notes:	
	Running M2Crypto does NOT use the version of OpenSSL that comes
	with Python.  You have to install OpenSSL separately, or
	M2Crypto's DLL won't find the OpenSSL DLLS.

There's a good chance that this may be related to:

[ python-Bugs-1098618 ] socket.setdefaulttimeout() breaks smtplib.starttls()

But that should have been fixed in Python 2.4.4, right?  Or did that patch
not make it in?

				John Nagle

(And no, I can't run Python 2.5, because MySQLdb support doesn't work for
2.5 yet.)
			

		


From gagsl-py at yahoo.com.ar  Fri Jan  5 09:12:18 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 05 Jan 2007 11:12:18 -0300
Subject: CPU management
In-Reply-To: <00ce01c730bf$cca10560$a5059296@IBM75CFA6491AB>
References: <00ce01c730bf$cca10560$a5059296@IBM75CFA6491AB>
Message-ID: <7.0.1.0.0.20070105103802.05c9cd08@yahoo.com.ar>

At Friday 5/1/2007 08:51, Fulvio D'Antonio wrote:

>I usally develop a lot of expensive (in terms of CPU usage) 
>algorithms. I would like to develop something that allows my 
>application to run quietly all day long with a little CPU usage, so 
>that I can work in the meanwhile!
>I'm running Python2.4 on Windows XP.

Call the function SetPriorityClass; documentation is on msdn.microsoft.com


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From gagsl-py at yahoo.com.ar  Thu Jan 11 17:19:42 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 11 Jan 2007 19:19:42 -0300
Subject: IDLE Python and Environment Variables
In-Reply-To: <1168526728.313917.309340@o58g2000hsb.googlegroups.com>
References: <1168482248.828858.161320@i39g2000hsf.googlegroups.com>
	<mailman.2557.1168493578.32031.python-list@python.org>
	<1168526728.313917.309340@o58g2000hsb.googlegroups.com>
Message-ID: <7.0.1.0.0.20070111191636.01d6cd48@yahoo.com.ar>

At Thursday 11/1/2007 11:45, Tristan wrote:

>I considered to use it, thanks!!  Incidentally (beg your pardon if it
>sounds to ignorance), can I define Environment variables in a config
>file and then apply to my python program?

Yes, read them from the config file and then use os.environ['name']=value
See http://docs.python.org/lib/os-procinfo.html


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From berteun at gmail.com  Mon Jan 22 04:48:05 2007
From: berteun at gmail.com (Berteun Damman)
Date: 22 Jan 2007 01:48:05 -0800
Subject: PQueue and Python 2.5
In-Reply-To: <mailman.2910.1169225422.32031.python-list@python.org>
References: <1169216890.617239.209170@51g2000cwl.googlegroups.com>
	<mailman.2910.1169225422.32031.python-list@python.org>
Message-ID: <1169459285.031773.108620@v45g2000cwv.googlegroups.com>

Gabriel Genellina wrote:
> Python got in 2.3 a heapq module in its standard library; I think it is what

> Ah! then I bet:
> - There is some C code involved.
> - It carelessly mixes PyMem_Malloc with PyObject_Free or similar as
> described in
> http://docs.python.org/whatsnew/ports.html
>
> So do yourself a favor and forget about such old piece of code...

I would be happy to do so, but it does suit my needs quite well. :) But
everybody thanks for pointing out the probable cause, I never did
anything with C-extentions before, so I wasn't aware of the 2.5
changes. But I'll look into the code.

Berteun



From watsocd at gmail.com  Mon Jan 15 17:01:28 2007
From: watsocd at gmail.com (Chuck)
Date: 15 Jan 2007 14:01:28 -0800
Subject: ReportLab - Frames - Images
Message-ID: <1168898486.300488.264920@a75g2000cwd.googlegroups.com>

I have been trying all day to get this to work. My complete code is
below. I can get my text into the PDF, I can get my image in the PDF.
What I can't get to work is frames so that the image (logo) appears to
the right of the text. The image always appears first and then the text
below on the next line.

Please help.


Chuck

*************** CUT ***********************
from reportlab.pdfgen import *

from reportlab.platypus import *

from reportlab.lib.units import inch
from reportlab.platypus  import SimpleDocTemplate
from reportlab.platypus  import flowables
from reportlab.lib.enums import TA_LEFT, TA_RIGHT, TA_CENTER,
TA_JUSTIFY

from reportlab.lib.pagesizes import letter



#precalculate some basics
top_margin = letter[1] - inch
bottom_margin = inch
left_margin = inch
right_margin = letter[0] - inch
frame_width = right_margin - left_margin

def bill(canvas, doc):
	canvas.saveState()
	canvas.restoreState()

def run():
	doc = []
	from reportlab.lib.styles import ParagraphStyle
	from reportlab.platypus import Image

	pdf = SimpleDocTemplate('bill2.pdf', pagesize = letter)

	#need a style
	normal = ParagraphStyle('normal')

	doc.append(Image("pic.jpg", 100, 71))  #Logo

	para = Paragraph("Some text1", normal)
	doc.append(para)
	para = Paragraph("Some text2", normal)
	doc.append(para)
	para = Paragraph("Some text3", normal)
	doc.append(para)
	para = Paragraph("Some text4", normal)
	doc.append(para)
	para = Paragraph(" ", normal)
	doc.append(para)
	doc.append(HRFlowable(color="black", thickness=3, width="100%"))


	pdf.build(doc,bill)

run()
*************************** CUT ***********************************



From jzgoda at o2.usun.pl  Thu Jan 25 16:22:10 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Thu, 25 Jan 2007 22:22:10 +0100
Subject: Python does not play well with others
In-Reply-To: <xqxirex3psq.fsf@cola3.ca.boeing.com>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<xqxirex3psq.fsf@cola3.ca.boeing.com>
Message-ID: <epb737$7b5$1@atlantis.news.tpi.pl>

Harry George napisa?(a):

> You experience isn't shared by everyone.  Some of us find Python the
> most functional and portable of the candidates you mention.

The point on MySQLdb is rather common, many people who used it with
SQLObject will confirm. Fortunately for MySQLdb, the MySQL on its own is
much worse. Fortunately for us, the MySQLdb library is not a part of
Python distribution, so Python can not be blamed for its deficiencies. ;)

-- 
Jarek Zgoda
http://jpa.berlios.de/


From bruno.desthuilliers at websiteburo.com  Thu Jan 25 07:31:25 2007
From: bruno.desthuilliers at websiteburo.com (Bruno Desthuilliers)
Date: Thu, 25 Jan 2007 13:31:25 +0100
Subject: While loop with "or"? Please help!
In-Reply-To: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
References: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
Message-ID: <45b8a31d$0$2401$426a74cc@news.free.fr>

wd.jonsson at gmail.com a ?crit :
> Hmm, my while loop with "or" doesn't seem to work as I want it to...
> How do I tell the while loop to only accept "Y" or "y" or "N" or "n"
> input from the str(raw_input)?
> 
> Thank's in advance!
> 
> Snippet of code:
> 
> import os
> 
> def buildfinder():
>     os.system("CLS")
>     GameRoot = os.getenv("GAME_ROOT") + "\\"
> 
>     print "Do you want to use " + GameRoot + " as your source
> directory?"
>     usr = str(raw_input('Y/N: '))
>     return usr
> 
> #Runs the buildfinder function
> usrinp = buildfinder()
> 
> def buildwhiler():
> 
>     while usrinp != "y" or "Y" or "N" or "n": <<<<----PROBLEM

Yes, obviously.

The above reads as:
       while (usrinp != "y") or ("Y") or ("N") or ("n"):

What you want is something like:
      while usrinp != "y" and usrinp != "Y" \
            and usrinp != "n" and usrinp != "N" :

which is better written as
      while not (usrinp == "y" or usrinp == "Y" \
                 or usrinp == "n" or usrinp == "N") :

which can be simplified using str.lower:
      while not (usrinp.lower() == "y" or usrinp.lower() == "n"):

and simplified again thanks to Python 'in' operator:
     while not usrinp.lower() in "yn":


>         print "Enter Y or N!"
>         usr = str(raw_input('Y/N: '))
>     else:
>         code continues


While we're at it, there are other problems in your code. One of them is 
that buildwhiler() will go in an infinite loop if the usr first typed 
anything else than "y", "Y", "n" or "N". I let you try to find out why, 
and just give you two hints :
- globals are Bad(tm)
- don't mix application logic with user-interface logic (ie: a function 
should only deal with one or the other, not mix both).

HTH


From sergey at fidoman.ru  Wed Jan 24 11:02:28 2007
From: sergey at fidoman.ru (Sergey Dorofeev)
Date: Wed, 24 Jan 2007 19:02:28 +0300
Subject: module email
Message-ID: <ep7vuk$235b$1@news.rtcomm.ru>

Hello.

Why does not work?

--------------
import email.message
import smtplib
import time

m=email.message.Message()
m.set_type("multipart/mixed")
m["From"]="Sergey Dorofeev <sergey at prodo.ru>"
m["To"]="Sergey Dorofeev <sergey at prodo.ru>"
m["Date"]=time.asctime()
m["Subject"]="test"


p1=email.message.Message()
p1.set_payload("message text", "us-ascii")
m.attach(p1)

p2=email.message.Message()
p2.set_payload("message text 2", "us-ascii")
m.attach(p2)

del p1,p2

print m.as_string()
print "*"*50


x=email.message.Message()
x.set_type("multipart/mixed")
x["From"]="Sergey Dorofeev <sergey at prodo.ru>"
x["To"]="Sergey Dorofeev <sergey at prodo.ru>"
x["Date"]=time.asctime()
x["Subject"]="test"

p1=email.message.Message()
p1.set_payload("message text !", "us-ascii")
print p1
x.attach(p1)


p2=email.message.Message()
p2.set_type("message/rfc822")
p2.set_payload(m)
print p2
x.attach(p2)


print "*"*50
print x.as_string()

--------------

I'm using Python 2.5 




From rubbishemail at web.de  Wed Jan 10 05:38:23 2007
From: rubbishemail at web.de (rubbishemail at web.de)
Date: 10 Jan 2007 02:38:23 -0800
Subject: convert binary data to int
In-Reply-To: <eo2eld$8ic$02$1@news.t-online.com>
References: <1168424278.193439.216770@k58g2000hse.googlegroups.com>
	<eo2eld$8ic$02$1@news.t-online.com>
Message-ID: <1168425503.067695.31080@p59g2000hsd.googlegroups.com>

[ord(x) for ...]
perfect, thank you


Daniel



From MI5Victim at mi5.gov.uk  Thu Jan  4 02:25:54 2007
From: MI5Victim at mi5.gov.uk (MI5Victim at mi5.gov.uk)
Date: 4 Jan 2007 07:25:54 GMT
Subject: MI5 Persecution: Counter-surveillance sweep by Nationwide
	Investigations Group
Message-ID: <m07000407254423@4ax.com>


Counter-surveillance sweep by Nationwide Investigations Group

In July 1994 the private detective agency Nationwide Investigations Group conducted an electronic counter-surveillance
sweep of my parents' home in London. They checked for radio transmitter devices, and tested the telephone line for attached
bugs. They found nothing. 

I am afraid that I was unsurprised at their not finding any evidence of covert surveillance. It had been made very clear to me,
particularly during 1990-92, that audio, and almost certainly video, surveillance of my parents' home was taking place. But this
would not have been made quite so obvious unless the persecutors were confident of their apparatus being undetectable using the
technology the police, or a private agency like Nationwide, would be using. 

I don't know very much about the surveillance technology that has been used against me, but I understand that devices can be built
which switch off on receiving a coded command, and may switch on again after a counter- surveillance sweep has completed; that devices
may rapidly alter the frequency of transmission, "frequency-hopping" devices which presumably cannot be detected in a sequential scan
of the sort employed by Nationwide; and of course "probe" microphones can be inserted "through-the-wall", although I hesitate to
believe our neighbours would permit this. 

We paid Nationwide ?411.25 (including VAT) for the surveillance sweep, which took them about an hour and a half to complete, using
a "Professional 5000 multi-scanner, CCL UHF scanner and Guideline telephone tap detector." As I said above, I don't know very much
about these things, so I can't comment on the capabilities or otherwise of this equipment. But clearly the "watchers" are using
technology which in 1994 was beyond the detection capabilities of a good private detective agency.

386



From paul at boddie.org.uk  Thu Jan 18 05:39:36 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 18 Jan 2007 02:39:36 -0800
Subject: Distributed computation of jobs
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
	<1168597288.571937.176430@s34g2000cwa.googlegroups.com>
	<eo7sj1$vn6$1@news.albasani.net>
	<slrneqs43f.p5f.hat@se-126.se.wtb.tue.nl>
	<1169046239.405261.81740@m58g2000cwm.googlegroups.com>
	<eolpg3$1rg$1@news.albasani.net>
Message-ID: <1169116776.675766.50320@l53g2000cwa.googlegroups.com>

robert wrote:
>
> as many libs are restriced to certain OS'es, and/or need/rely on
> extension modules, few tags would probably improve: OS'es,
> pure-python, dependeniess

I've added some platform notes, although the library dependencies of
various MPI and PVM solutions are sort of obvious, but I'll get round
to adding those at some point unless you beat me to it. ;-)

Paul



From goodidea1950 at hotmail.spam.com  Sat Jan 27 20:53:47 2007
From: goodidea1950 at hotmail.spam.com (AKA gray asphalt)
Date: Sat, 27 Jan 2007 17:53:47 -0800
Subject: Do I need Python to run Blender correctly?
References: <tRZth.2027$pH3.140@newsfe12.phx>
	<5%4uh.75582$wP1.6882@newssvr14.news.prodigy.net>
Message-ID: <joTuh.3445$4W5.1382@newsfe10.phx>


"John Nagle" <nagle at animats.com> wrote in message 
news:5%4uh.75582$wP1.6882 at newssvr14.news.prodigy.net...
> AKA gray asphalt wrote:
>> I downloaded Blender but there was no link for python. Am I on the right 
>> track?
>
>    Blender doesn't require Python, but if you have Python, you can
> write plug-ins for Blender.   Get "The Blender Book"; otherwise
> you'll never figure Blender out.
>
> John Nagle

I'm thinking about not upgrading "Strata 3D" because it still doesn't export 
textures with obj files and it just created an undo of more than one action, 
believe it or not... Am I expectiong too much of a $400+ program, to export 
textures with obj files? Does Blender do this? I see the BBook on Amazon for 
$30. That's probably my best bet, no?





From aahz at pythoncraft.com  Wed Jan 31 12:40:40 2007
From: aahz at pythoncraft.com (Aahz)
Date: 31 Jan 2007 09:40:40 -0800
Subject: how to "free" an object/var ?
References: <dfacb$45bfd788$d443bb3a$7010@news.speedlinq.nl>
	<epolgl$8i4$1@zinnia.noc.ucla.edu>
	<pan.2007.01.31.06.52.12.82782@REMOVEME.cybersource.com.au>
	<AAXvh.1465$zH1.1114@newssvr29.news.prodigy.net>
Message-ID: <epqkao$adk$1@panix3.panix.com>

In article <AAXvh.1465$zH1.1114 at newssvr29.news.prodigy.net>,
John Nagle  <nagle at animats.com> wrote:
>Steven D'Aprano wrote:
>> On Tue, 30 Jan 2007 15:48:37 -0800, James Stroud wrote:
>> 
>> 
>>>Stef Mientki wrote:
>>>
>>>>If I create a large array of data or class,
>>>>how do I destroy it (when not needed anymore) ?
>
>    If your data structure has no backlinks, it will go away
>as soon as the last reference to it disappears.  If your
>data structure has backlinks, it will hang around until
>garbage collection runs.  If your backlinks are
>weak references (see "weakref"), the data structure will
>be released much sooner.

Note that exceptions create links.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From duncan.booth at invalid.invalid  Fri Jan 12 06:06:29 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 Jan 2007 11:06:29 GMT
Subject: Learning Python book, new edition?
References: <mailman.2635.1168592793.32031.python-list@python.org>
	<slrneqepvc.c32.swayne@wayne.powernet>
Message-ID: <Xns98B671021F2DDduncanbooth@127.0.0.1>

Steven Wayne <nobody at localhost.localdomain> wrote:

> Don't take this the wrong way, but this isn't an email, it's a usenet
> posting.

It is now, but it started as an email. If you examine its headers he sent 
it to the list but the list administrator had set up software up to copy 
the email to a newsgroup. Fortunately, as you said, the email gave him 
permission to do that otherwise the entire legal profession might have 
collapsed under its own weight.


From joshua at eeinternet.com  Thu Jan 11 20:05:44 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Thu, 11 Jan 2007 16:05:44 -0900
Subject: PDF rendering toolkit?
References: <mailman.2348.1168030338.32031.python-list@python.org>
	<509gkmF1eufvtU1@mid.uni-berlin.de>
	<mailman.2420.1168271491.32031.python-list@python.org>
Message-ID: <45a6d236$0$4777$88260bb3@free.teranews.com>

Jorge Vargas wrote:

> On 1/6/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
>> > I'm looking for a tool to take an actual .pdf file and display it in a
>> > window (I'm using wxwidgets at the moment)
>>
>> No idea if there is a one-shot-kills-them-all solution out there - but
>> if you have a way to go for windows, you might checkout PyQt and PyKDE
>> to embed a kpfd-view in a window of yours.
>>
>> I agree that it is less than desirable to switch toolkits - but if you
>> _have_ to...
>>
> yes indeed the problem with that is I want my code to be portable that
> is the reason I'm working on top of wx.

Qt3 (and PyQt3) is available on all platforms.  Qt4 (and PyQt4) is GPL on
all platforms for GPL projects.  You no longer *have* to stick with wx for
cross platform GPL goodness.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From gagsl-py at yahoo.com.ar  Tue Jan 23 18:57:06 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 23 Jan 2007 20:57:06 -0300
Subject: How to instantiate a different class in a constructor?
In-Reply-To: <45B6951C.4030100@gentlemail.com>
References: <mailman.3024.1169551181.32031.python-list@python.org>
	<1169563525.644251.118250@v45g2000cwv.googlegroups.com>
	<45B6951C.4030100@gentlemail.com>
Message-ID: <7.0.1.0.0.20070123205039.04665f30@yahoo.com.ar>

At Tuesday 23/1/2007 20:07, GiBo wrote:

>BTW When is the subclass.__init__() method invoked if I don't explicitly
>call it from __new__()? Apparently not from baseclass.__new__() nor from
>object.__new__().

At instance creation, when type(name, bases, ns) is invoked, after 
the __new__ call, but only if the returned object is an instance of 
type. This happens in function type_call (in typeobject.c)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From jairodsl at gmail.com  Tue Jan 16 18:08:58 2007
From: jairodsl at gmail.com (jairodsl)
Date: 16 Jan 2007 15:08:58 -0800
Subject: How can i eval subindex on list[ ][ ] ?
Message-ID: <1168988937.512029.192800@q2g2000cwa.googlegroups.com>

Excuse me, i was trying in too many ways but i couldnt access subindex
on a list , the problem is the next:

I have

indif=[[0,'A'],[1,'B'],[2,'C'],[3,'D']]

and

indic=[[0,'B'],[1,'C'],[2,'D'],[3,'E']]

i need to eval if indic[i][j] is equal to indif[i][j]

I used a double for but i had got "list index out of range". How can i
do ???

Thanks a lot,

Cordially,

jDSL



From grahn+nntp at snipabacken.dyndns.org  Sun Jan  7 09:39:50 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 7 Jan 2007 14:39:50 GMT
Subject: Why less emphasis on private data?
References: <1168128425.058049.221320@v33g2000cwv.googlegroups.com>
	<mailman.2383.1168131242.32031.python-list@python.org>
	<7xd55rzke9.fsf@ruckus.brouhaha.com>
Message-ID: <slrneq2055.tcj.grahn+nntp@frailea.sa.invalid>

On 06 Jan 2007 17:38:06 -0800, Paul Rubin <http> wrote:
> "BJ?rn Lindqvist" <bjourne at gmail.com> writes:
>> It is given that emphasizing private data (encapsulation) leads to
>> more internal complexity and more lines of code because you have to
>> write getters and setters and stuff.
>
> You can have public variables in Java if you choose to.  Writing
> private variables with public setters and getters is just a style choice.

Privates with getters/setters are (as I think someone else hinted) pretty
pointless. The interesting stuff is the private data that *is* private, i.e.
not meant for users at all.

But yes, I don't mind not having 'private:' in Python. I don't have
compile-time type checking anyway. In fact, I don't always know what the
attributes of my objects /are/ until runtime.

And besides, this is pretty close to a compile-time check:

  find -name \*.py | \
  xargs egrep '\._[_a-z]' | \
  fgrep -v self._

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From python at hope.cz  Fri Jan 12 04:36:17 2007
From: python at hope.cz (Lad)
Date: 12 Jan 2007 01:36:17 -0800
Subject: How to run external program?
Message-ID: <1168594577.397453.320380@a75g2000cwd.googlegroups.com>

How  can I run external program from Python?
I use Python with XP
Thank you for help
LB



From patrick.down at gmail.com  Fri Jan  5 18:57:14 2007
From: patrick.down at gmail.com (Patrick Down)
Date: 5 Jan 2007 15:57:14 -0800
Subject: What is proper way to require a method to be overridden?
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
Message-ID: <1168041434.385029.55870@38g2000cwa.googlegroups.com>

jeremito wrote:
> I am writing a class that is intended to be subclassed.  What is the
> proper way to indicate that a sub class must override a method?
>
> Thanks,
> Jeremy

Decorators to the rescue?

def must_override(f):
    def t(*args):
        raise NotImplementedError("You must override " + f.__name__)
    return t

class Foo:
    @must_override
    def Bar(x,y): pass

Foo().Bar()

Traceback (most recent call last):
  File "testit.py", line 14, in ?
    Foo().Bar()
  File "testit.py", line 5, in t
    raise NotImplementedError("You must override " + f.__name__)
NotImplementedError: You must override Bar



From oliphant.travis at ieee.org  Thu Jan 25 12:58:40 2007
From: oliphant.travis at ieee.org (Travis Oliphant)
Date: Thu, 25 Jan 2007 10:58:40 -0700
Subject: Two dimensional lists
In-Reply-To: <45B8DDE4.9000903@designaproduct.biz>
References: <be5994b50701250817l54b5c8a9g359b917eb8fdda75@mail.gmail.com>
	<45B8DDE4.9000903@designaproduct.biz>
Message-ID: <epar4g$kjg$1@sea.gmane.org>

Laszlo Nagy wrote:
>># shouldn't I be able to fill the lists simply by pointing to a location?
>>
>>matrix[a_idx, p_idx] = 0x219 # and so on?
>>  
> 
> Lists are not matrices. For example:
> 
> L = [  [1,2,3], ['a','b','c'], 10 ]
> print L[1][2] # Prints 'c', you will like this syntax but...
> print L[2][5] # TypeError: 10 is not subscriptable
> 
> You can create a function that creates a "list of lists" filled with 
> zeros, and then use this data structure as a matrix.
> 
> BUT! If you need to use matrices filled with numbers, try numarray:
> 
> http://www.stsci.edu/resources/software_hardware/numarray
> 
> Numarray is much more efficient for this task.

It is also out-dated.  For new code users are strongly encouraged to use 
NumPy.  The numarray people are transitioning their own code to use 
NumPy and numarray will cease being supported at some point.

http://numpy.scipy.org

http://www.numpy.org --- sourceforge site.

-Travis



From shansen at advpubtech.com  Tue Jan 16 00:48:33 2007
From: shansen at advpubtech.com (Stephen Hansen)
Date: Mon, 15 Jan 2007 21:48:33 -0800
Subject: RotatingFileHandler + subprocess module problems
In-Reply-To: <7.0.1.0.0.20070111231652.05977e10@yahoo.com.ar>
References: <7a9c25c20701111059q1186377nde4021eaf768d345@mail.gmail.com>
	<7.0.1.0.0.20070111231652.05977e10@yahoo.com.ar>
Message-ID: <7a9c25c20701152148g371ce875gf96e84bcf320472d@mail.gmail.com>

That was perfect-- it now all behaves as it should. Thanks!

On 1/11/07, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
>
> At Thursday 11/1/2007 15:59, Stephen Hansen wrote:
>
> >If I run app1, and then app2, it all works fine. Specifically, the
> >apps are logging correctly and I can see with Process Explorer that
> >each has a handle to the appropriate files.
> >
> >However, I have a setting to make App2 run App1 in the background
> >for convienance. This is using the subprocess module. When this
> >setting is on, App2 will die horribly the first time that the
> >doRollover comes along: specifically it gets a permission denied
> >error when it tries to rename App2.log to App2.log.1
> >
> >After doing some debugging, it appears that App1 (if started by App2
> >using the subprocess module) has a handle to App2.log /somehow/. It
> >never starts it, or touches it (verified through debug messages),
> >but seems to inherit it.
>
> That's subprocess fault. You menctioned Process Explorer, it appears
> you're using Windows.
> Using subprocess, the child process always inherits all file handles
> from its parent. This may or may not be desirable, and in your case,
> it's not. App1 inherits the open file handle to App2.log.
> Inside subprocess.py, near line 789, there is a call to
> CreateProcess; its 5th parameter is called bInheritHandles and it's
> set to 1. The comment "must inherit handles to pass std handles" is
> wrong AFAIK, and setting STARTF_USESTDHANDLES in startupinfo   should
> be enough. (It may be that some lines above, STARTF_USESTDHANDLES is
> not correctly set).
> I'll try to investigate a bit more and file a bug report or a patch.
> In the meantime, you could replace that 1 in CreateProcess by a 0.
> Specially if you don't use PIPE or redirects, your problem should go away.
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
>
>
>
>
>
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya!
> http://www.yahoo.com.ar/respuestas
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070115/45e46a88/attachment.html>

From bj_666 at gmx.net  Wed Jan 31 11:01:59 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 31 Jan 2007 17:01:59 +0100
Subject: another newbie question: why should you use "*args" ?
References: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
	<mailman.3346.1170254361.32031.python-list@python.org>
	<4b4a3$45c0b94c$83aef404$20934@news1.tudelft.nl>
Message-ID: <pan.2007.01.31.16.01.58.244097@gmx.net>

In <4b4a3$45c0b94c$83aef404$20934 at news1.tudelft.nl>, stef wrote:

> Eugene Antimirov wrote:
>
>> And one note more. Just to be more pythonic you shouldn't use form 
>> range(len(blabla)). Instead use:
>>
>> for i in list:
>> ....blabla...
>>
>>
> I would love that,
> but please tell me how (I need an integer counter for something else too):
> 
> def chunk_plot(*args):
>     if len(args) == 1:  list = args[0]
>     else:               list = args
>  
>     color = ['g','r','b','y','m']
>     plot ( list[0], color[0])
>     hold (True)
>     for i in range  (  1,  len(list)  ):
>          plot  (  list[i],  color[i]  )

No need for the counter here.

for args in zip(list[1:], color[1:]):
    plot(*args)

Ciao,
	Marc 'BlackJack' Rintsch


From sean at datafly.net  Wed Jan 24 03:06:17 2007
From: sean at datafly.net (Sean Schertell)
Date: Wed, 24 Jan 2007 17:06:17 +0900
Subject: How to use dynamic properties? <-- Noob
In-Reply-To: <45B5C1CD.6010009@islandtraining.com>
References: <BCF1D59F-ECFE-4F43-AC2A-797A6E344638@datafly.net>
	<45B5C1CD.6010009@islandtraining.com>
Message-ID: <67CD438D-08B4-492B-B96C-9A3D844A4EA0@datafly.net>

Yep, that was it. Thanks Gary :-)

Sean



On Jan 23, 2007, at 5:05 PM, Gary Herron wrote:

> Sean Schertell wrote:
>> person.name = 'Joe'
>> person.age = 20
>> person.sex = 'm'
>>
>> info_I_need = name
>>
>> print person.info_I_need
>>
>> # How can I make it print 'Joe' ?
>>
>>
>> Sean
>>
>>
>> ::::  DataFly.Net  ::::
>> Complete Web Services
>> http://www.datafly.net
>>
>>
> Like this:
>
>    info_I_need = 'name'
>
>    print getattr(person, info_I_need)
>
> Related to getattr are setattr and hasattr.
> Gary Herron
>
>
>
>

::::  DataFly.Net  ::::
Complete Web Services
http://www.datafly.net



From jorge.vargas at gmail.com  Mon Jan  8 10:57:45 2007
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Mon, 8 Jan 2007 11:57:45 -0400
Subject: PDF rendering toolkit?
In-Reply-To: <4866bea60701080747s380f909ana6559da75d8d894f@mail.gmail.com>
References: <32822fe60701051252s6353f10drc101109adc376fdb@mail.gmail.com>
	<4866bea60701080747s380f909ana6559da75d8d894f@mail.gmail.com>
Message-ID: <32822fe60701080757s35f6054dx606ee6ae19e1e08a@mail.gmail.com>

On 1/8/07, Chris Mellon <arkanes at gmail.com> wrote:
> On 1/5/07, Jorge Vargas <jorge.vargas at gmail.com> wrote:
> > Hi
> >
> > I'm looking for a tool to take an actual .pdf file and display it in a
> > window (I'm using wxwidgets at the moment)
> >
> > I have found several project but none seem to do what I need.
> >
> > http://sourceforge.net/projects/pdfplayground seems like a nice
> > toolkit to edit pdf files with python code, but nothing about
> > rendering.
> >
> > I have find out http://poppler.freedesktop.org/ but there seems to be
> > no python bindings for it.
> >
> > there is also an example at http://www.daniweb.com/code/snippet618.html
> > using wx.lib.pdfwin but that is windows only, I need at least Linux
> > support better if it's platform independant as python *should* be
> >
> > and the reportlabs BSD packages can't do this.
> > http://www.reportlab.org/devfaq.html#2.1.5
> >
> > anyone knows of a toolkit to do this? bonus points if's it is already
> > integrated into wxpython
> > --
>
> Rendering PDF is quite hard, much harder than writing it.
yes indeed
> There are
> relatively few PDF rendering solutions for any platform, and it's
> non-trivial to merge one with a specific UI solution. So I'm not aware
> of any cross-platform solution. Most PDF usage either embeds the Adobe
> ActiveX control (on windows) or just shunts it off the user to find a
> working PDF viewer.
I guess for now I'll use the ActiveX code on windows and try out
Martin's suggestion on embedding a window of acrobat reader on the
linux part.

On the other hard I'm going to email the poppler guys to see if they
are interested in some python and/or wxwidgets integration.


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


From cvanarsdall at mvista.com  Tue Jan 30 14:28:37 2007
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Tue, 30 Jan 2007 11:28:37 -0800
Subject: The reliability of python threads
In-Reply-To: <%OLvh.67202$qO4.51886@newssvr13.news.prodigy.net>
References: <mailman.3092.1169657938.32031.python-list@python.org>	<ep8gue$3tu$1@panix3.panix.com>	<mailman.3166.1169752349.32031.python-list@python.org>	<epm7su$qtb$1@panix3.panix.com>
	<%OLvh.67202$qO4.51886@newssvr13.news.prodigy.net>
Message-ID: <45BF9C65.5080800@mvista.com>

John Nagle wrote:
> Aahz wrote:
>   
>> In article <mailman.3166.1169752349.32031.python-list at python.org>,
>> Carl J. Van Arsdall <cvanarsdall at mvista.com> wrote:
>> My point is that an app that dies only once every few months under load
>> is actually pretty damn stable!  That is not the kind of problem that
>> you are likely to stimulate.
>>     
>
>      This has all been so vague.  How does it die?
>   
Well, before operating on most of the data I perform type checks, if the 
type check fails, my system flags an exception.  Now i'm in the process 
of finding out how the data went bad.  I gotta wait at this point 
though, so I was investigating possibilities so I could find a new way 
of throwing the kitchen sink at it.


>      It would be useful if Python detected obvious deadlock.  If all threads
> are blocked on mutexes, you're stuck, and at that point, it's time
> to abort and do tracebacks on all threads.   You shouldn't have to
> run under a debugger to detect that.
>
>      Then a timer, so that if the Global Python Lock
> stays locked for more than N seconds, you get an abort and a traceback.
> That way, if you get stuck in some C library, it gets noticed.
>
>      Those would be some good basic facilities to have in thread support.
>   
I agree.  That would be incredibly useful.  Although doesn't this spark 
up the debate on threads killing threads?  From what I understand, this 
is frowned upon (and was removed from java because it was dangerous).  
Although I think that if there was a master or control thread that 
watched the state of the system and could intervene, that would be 
powerful.  One way to do this could be to use processes, and each 
process could catch a kill signal if it appears to be stalled, although 
I am absolutely sure there is more to it than that.  I don't think this 
could be done at all with python threads though, but as a fan of python 
threads and their ease of use, it would be a nice and powerful feature 
to have.


-carl


-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From steve at holdenweb.com  Thu Jan 11 17:49:01 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 11 Jan 2007 22:49:01 +0000
Subject: Matching Directory Names and Grouping Them
In-Reply-To: <1168554244.459131.190440@k58g2000hse.googlegroups.com>
References: <1168554244.459131.190440@k58g2000hse.googlegroups.com>
Message-ID: <eo6est$di4$1@sea.gmane.org>

J wrote:
> Hello Group-
> 
> I have limited programming experience, but I'm looking for a generic
> way to search through a root directory for subdirectories with similar
> names, organize and group them by matching their subdirectory path, and
> then output their full paths into a text file. For example, the
> contents of the output text file may look like this:
> 
> <root>\Input1\2001\01\
> <root>\Input2\2001\01\
> <root>\Input3\2001\01\
> 
> <root>\Input1\2002\03\
> <root>\Input2\2002\03\
> <root>\Input3\2002\03\
> 
> <root>\Input2\2005\05\
> <root>\Input3\2005\05\
> 
> <root>\Input1\2005\12\
> <root>\Input3\2005\12\
> 
> I tried working with python regular expressions, but so far haven't
> found code that can do the trick. Any help would be greatly
> appreciated. Thanks!
> 
Define "similar".

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com



From gigs at hi.t-com.hr  Tue Jan  9 17:46:45 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Tue, 09 Jan 2007 23:46:45 +0100
Subject: find.find
Message-ID: <eo15uq$hna$1@ss408.t-com.hr>

import fnmatch, os

def find(pattern, startdir=os.curdir):
     matches = []
     os.path.walk(startdir, findvisitor, (matches, pattern))
     matches.sort()
     return matches

def findvisitor((matches, pattern), thisdir, nameshere):  #
     for name in nameshere:
         if fnmatch.fnmatch(name, pattern):
             fullpath = os.path.join(thisdir, name)
             matches.append(fullpath)

can someone explain why (matches, pattern) is doing in this two funct?

thanks


From gandalf at designaproduct.biz  Mon Jan 29 10:24:18 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Mon, 29 Jan 2007 16:24:18 +0100
Subject: Random passwords generation (Python vs Perl) =)
In-Reply-To: <1170082420.420688.109910@l53g2000cwa.googlegroups.com>
References: <1170046719.708692.243290@s48g2000cws.googlegroups.com>	<1170064302.264009.12650@p10g2000cwp.googlegroups.com>	<7xveiqapwi.fsf@ruckus.brouhaha.com>
	<1170082420.420688.109910@l53g2000cwa.googlegroups.com>
Message-ID: <45BE11A2.70806@designaproduct.biz>

NoName ?rta:
> Hmmm..
> In the Perl example password generates after user hit ENTER not 
> continously like in Python you wrote... :)
>
> i want see various ways to generate passwords even if they some 
> indirect like using BASE64
>   
I copied this from a recipe, I do not remember which one. I like it very 
much because it creates password that are easy to type in. You can type 
every odd letter with your left hand and every even letter with your 
right hand.

Best,

   Leslie

from random import Random

PASSWORD_LENGTH = 10

rng = Random()

def generatePassword(length=PASSWORD_LENGTH,alternate_hands=True):
    righthand = '23456qwertasdfgzxcvbQWERTASDFGZXCVB'
    lefthand = '789yuiophjknmYUIPHJKLNM'
    allchars = righthand + lefthand
    res = ""
    for i in range(length):
        if not alternate_hands:
            res += rng.choice(allchars)
        else:
            if i%2:
                res += rng.choice(lefthand)
            else:
                res += rng.choice(righthand)
    return res


if __name__ == '__main__':
    for i in range(10):
        print generatePassword()


From ramdaz at gmail.com  Mon Jan  1 14:33:42 2007
From: ramdaz at gmail.com (Ramdas)
Date: 1 Jan 2007 11:33:42 -0800
Subject: How do I add users using Python scripts on a Linux machine
Message-ID: <1167680022.061496.164160@v33g2000cwv.googlegroups.com>

How do I add users using Python scripts on a Linux machine?

Someone has a script?



From malaclypse2 at gmail.com  Fri Jan 19 17:35:02 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Fri, 19 Jan 2007 17:35:02 -0500
Subject: OT Annoying Habits (Was: when format strings attack)
In-Reply-To: <2BBAEE949D384D40A2B851287ADB6A4304595A9C@eugsrv400.psc.pscnet.com>
References: <2BBAEE949D384D40A2B851287ADB6A4304595A9C@eugsrv400.psc.pscnet.com>
Message-ID: <16651e80701191435y63fe725bwbd541b6011992713@mail.gmail.com>

On 1/19/07, Carroll, Barry <Barry.Carroll at psc.com> wrote:
> Secondly, can someone point me to the Standard Usenet Convention that
> mandates against top-posting.  This is not sarcasm; I would really like
> to see it.

For what (very little) it's worth, see RFC 1855.

-- 
Jerry


From __peter__ at web.de  Tue Jan  2 12:49:06 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 02 Jan 2007 18:49:06 +0100
Subject: how to use execfile with argument under windows
References: <1167757591.465076.314700@h40g2000cwb.googlegroups.com>
Message-ID: <ene5rk$hu6$03$1@news.t-online.com>

baur79 wrote:

> i need to execute this command line (different source for n times)
> 
> filename.exe -type png -source sourcearg -file filename.png

> i try with python (python script and filename.exe in same directory)

> execfile("filename.exe -type png -source sourcearg -file filename.png")

That does not do what you think it does, see

http://docs.python.org/lib/built-in-funcs.html#l2h-26

You need os.system() or, for more complex applications, the subprocess
module.

Peter


From paul at boddie.org.uk  Thu Jan 11 13:36:22 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 11 Jan 2007 10:36:22 -0800
Subject: Read from database, write to another database, simultaneously
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
	<50l9dlF1fuc1sU1@mid.individual.net>
	<eo4sor$du4$1@upsn250.cri.u-psud.fr>
	<1168519760.894380.303990@i39g2000hsf.googlegroups.com>
	<33vph.8825$pQ3.2190@newsread4.news.pas.earthlink.net>
Message-ID: <1168540582.125402.78850@p59g2000hsd.googlegroups.com>

Dennis Lee Bieber wrote:
>
>  "need"? No... the "copy ... from ..." statement "needs" such, but do
> you really "need" to use "copy ... from ..." to load the data -- or is
> this just a concept that caught your fancy?

In chapter 13 of the PostgreSQL 8.1 documentation ("Performance Tips"),
descending into section 13.4 ("Populating a Database"), whose
introduction may not admittedly coincide precisely with the inquirer's
use case ("first populating a database" doesn't strictly apply, but it
may yet describe a situation that is close enough given the kind of
data involved), and within section 13.4.2 ("Use COPY"), the text reads
as follows:

"Use COPY to load all the rows in one command, instead of using a
series of INSERT commands."

http://www.postgresql.org/docs/8.1/static/populate.html#POPULATE-COPY-FROM

>  If  you can get Oracle to dump the data in the form of SQL insert
> statements, maybe with some clean-up done by a script, and feed them to
> PostgreSQL the entire job starts to look something like:
>
> odump theDatabase | python cleanup.py | psql theNewDatabase

The problem with this approach (as the manual notes) is that COPY is a
lot faster than lots of INSERT statements:

"Note that loading a large number of rows using COPY is almost always
faster than using INSERT, even if PREPARE is used and multiple
insertions are batched into a single transaction."

My experience with inserting large numbers of records into PostgreSQL
suggests that this advice should not be readily ignored.

Paul



From deets at nospam.web.de  Fri Jan 19 06:07:07 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 19 Jan 2007 12:07:07 +0100
Subject: How to find out if another process is using a file
References: <eoo6vd$33u$1@gemini.csx.cam.ac.uk>
	<mailman.2875.1169138635.32031.python-list@python.org>
	<eoq871$8dt$1@gemini.csx.cam.ac.uk>
Message-ID: <51bn2rF1jn1paU1@mid.uni-berlin.de>

Tom Wright wrote:

> js  wrote:
>> How about using lock?
>> Let writing process locks the files before writing, and unlock after
>> the job's done.
> 
> Is locking mandatory or co-operative? I don't have any control over the
> process which is doing the writing, so if it's co-operative it's no good
> to me.
> 
> If it's mandatory, then I can try to acquire a lock on the file - if this
> fails or blocks, then the other process must have it open.  Will this
> work?

AFAIK it's cooperative.

Diez


From martin at v.loewis.de  Mon Jan 22 16:43:35 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 22 Jan 2007 22:43:35 +0100
Subject: mmap caching
In-Reply-To: <slrner8v4p.l0v.nick@irishsea.home.craig-wood.com>
References: <1169367640.895556.34160@l53g2000cwa.googlegroups.com>
	<45B3DD4D.3010009@v.loewis.de>
	<1169422167.683707.264180@a75g2000cwd.googlegroups.com>
	<45B3FDA7.9030702@v.loewis.de>
	<slrner8v4p.l0v.nick@irishsea.home.craig-wood.com>
Message-ID: <45B53007.4050004@v.loewis.de>

Nick Craig-Wood schrieb:
> So presumably it is python generating a MemoryError.  It is asking for
> a new bit of memory and it is failing so it throws a MemoryError.
> 
> Could memory allocation under windows be affected by a large chunk of
> mmap()ed file which is physically swapped in at the time of the
> allocation?

To my knowledge, no. There might be virtual memory quotas, but I don't
think Windows supports such a concept.

More likely, this is entirely unrelated to the mmap issue. I would
guess that the machine on which the problem occurs is close to
exhausting its swap file (because of other activities in the system),
so Python occasionally manages to exhaust the swap file, through
regular allocations (memory-mapped files don't contribute to
swap file usage, as they have their own disk-backing, namely in the
file being mapped).

Regards,
Martin


From borntonetwork at gmail.com  Sat Jan 20 19:47:40 2007
From: borntonetwork at gmail.com (borntonetwork)
Date: 20 Jan 2007 16:47:40 -0800
Subject: The proper use of QSignalMapper
In-Reply-To: <86ec2$45b24bc1$54d1d767$19264@news.chello.no>
References: <1169045073.138626.60770@l53g2000cwa.googlegroups.com>
	<1169049100.393777.269350@v45g2000cwv.googlegroups.com>
	<1169085859.586698.149400@51g2000cwl.googlegroups.com>
	<1169135947.039984.108930@51g2000cwl.googlegroups.com>
	<1169305392.100624.295850@11g2000cwr.googlegroups.com>
	<86ec2$45b24bc1$54d1d767$19264@news.chello.no>
Message-ID: <1169340460.317597.161580@l53g2000cwa.googlegroups.com>

How simple. I will remember that sender() function for future
reference.
Thanks, David.

David Boddie wrote:
> On Saturday 20 January 2007 16:03, borntonetwork wrote:
>
> > David, thanks for your help. Unfortunately, all attempts of making this
> > solution work have failed. I would be interested to know if anyone has
> > used QSignalMapper successfully in a similar situation.
>
> Looking again at what you originally wrote, and looking at your
> solution below, I don't think it's really appropriate to use a
> QSignalMapper for this purpose. (That's what I understood from the
> signature of the deleteProductIngredient() method you had in your
> original code.)
>
> What you appear to want is a way of being notified about state
> changes to widgets that also identifies the individual widget
> that changed. You can do that by connecting the individual widgets
> to the same slot and call sender() to find out which object emitted
> the signal; for example:
>
>         # ...
>
>         for idx in range(1, maxIngredients+1):
>             wName = 'chkProductIngredientsDelete_'+str(idx)
>             w = self.__dict__[wName]
>             self.connect(w, QtCore.SIGNAL("stateChanged(int)"),
>                          self.deleteProductIngredient)
>
>   def deleteProductIngredient(self, state):
>       """Delete a product ingredient."""
>       print self.sender(), "changed state to", state
>
> What QSignalMapper does is collect signals from different objects,
> assigning an ID to each of them, and emits a single signal with
> an ID whenever it receives a signal from one of those objects.
> In other words, it allows the actions of a group of objects to be
> described by a parameter but discards the signal's arguments.
> It's most useful for things like collections of push buttons where
> you only need to know that they were clicked.
>
> > For any interested, I worked around the problem using a closure,
> > which seems a bit cleaner from a coding point of view, although
> > I don't have any idea if it is more efficient or not:
>
> [...]
>
> > Each iteration then created a new function based on the closure:
>
> [...]
>
> It's good to know that you got something working in the end. There's
> also another solution that involves QSignalMapper, but it may not make
> the resulting code any simpler.
> 
> David



From timr at probo.com  Tue Jan  9 03:35:42 2007
From: timr at probo.com (Tim Roberts)
Date: Tue, 09 Jan 2007 08:35:42 GMT
Subject: Module to read svg
References: <1168225193.883421.185140@s80g2000cwa.googlegroups.com>
	<45a1f746$0$27874$9b622d9e@news.freenet.de>
	<mailman.2409.1168254647.32031.python-list@python.org>
Message-ID: <juk6q21g1takpgsv9qh0vlf1ev70ogec2g@4ax.com>

Robert Kern <robert.kern at gmail.com> wrote:

>Martin v. L?wis wrote:
>> schpok at gmail.com schrieb:
>>> Does anyone know if there's an actual free implementation of this?
>> 
>> For the dom module in it, xml.dom.minidom should work. Depending on
>> your processing needs, that might be sufficient.
>
>I don't think it quite fits what the OP is asking for. SVG defines some non-XML
>structure for some of its contents. For example:
>
>  <polyline points="100,200 100,100" />

Why is that non-XML?
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From gert.cuykens at gmail.com  Tue Jan 16 13:20:49 2007
From: gert.cuykens at gmail.com (Gert Cuykens)
Date: Tue, 16 Jan 2007 19:20:49 +0100
Subject: whats wrong with my reg expression ?
In-Reply-To: <slrneqpin0.1r4.horpner@FIAD06.norwich.edu>
References: <ef60af090701151441j2dbc2308ka8f326a181b6bba8@mail.gmail.com>
	<7.0.1.0.0.20070115195902.05c75aa0@yahoo.com.ar>
	<mailman.2753.1168904594.32031.python-list@python.org>
	<slrneqpin0.1r4.horpner@FIAD06.norwich.edu>
Message-ID: <ef60af090701161020g3f98d58fnbb313134de4d371d@mail.gmail.com>

thx it works now


From konrad.hinsen at laposte.net  Fri Jan 12 08:49:59 2007
From: konrad.hinsen at laposte.net (Konrad Hinsen)
Date: Fri, 12 Jan 2007 14:49:59 +0100
Subject: Parallel Python
In-Reply-To: <1168597288.571937.176430@s34g2000cwa.googlegroups.com>
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
	<1168558876.033624.178010@k58g2000hse.googlegroups.com>
	<1168597288.571937.176430@s34g2000cwa.googlegroups.com>
Message-ID: <820B079C-AB6B-4685-86F1-8B87EA04A11B@laposte.net>

On Jan 12, 2007, at 11:21, Paul Boddie wrote:

> done. My own experience with regard to releasing software is that even
> with an open source licence, most people are likely to ignore your
> projects than to suddenly jump on board and take control, and even if

My experience is exactly the same. And looking into the big world of  
Open Source programs, the only case I ever heard of in which a  
project was forked by someone else is the Emacs/XEmacs split. I'd be  
happy if any of my projects ever reached that level of interest.

> Related to your work, I've released a parallel execution solution
> called parallel/pprocess [1] under the LGPL and haven't really heard
> about anyone really doing anything with it, let alone forking it and

That's one more project... It seems that there is significant  
interest in parallel computing in Python. Perhaps we should start a  
special interest group? Not so much in order to work on a single  
project; I believe that at the current state of parallel computing we  
still need many different approaches to be tried. But an exchange of  
experience could well be useful for all of us.

Konrad.
--
---------------------------------------------------------------------
Konrad Hinsen
Centre de Biophysique Mol?culaire, CNRS Orl?ans
Synchrotron Soleil - Division Exp?riences
Saint Aubin - BP 48
91192 Gif sur Yvette Cedex, France
Tel. +33-1 69 35 97 15
E-Mail: hinsen at cnrs-orleans.fr
---------------------------------------------------------------------




From no-spam at no-spam-no-spam.invalid  Wed Jan 10 08:25:34 2007
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 10 Jan 2007 14:25:34 +0100
Subject: Is there a way to protect a piece of critical code?
In-Reply-To: <mailman.2524.1168424917.32031.python-list@python.org>
References: <mailman.2524.1168424917.32031.python-list@python.org>
Message-ID: <eo2pgf$j57$1@news.albasani.net>

Hendrik van Rooyen wrote:
> Hi,
> 
> I would like to do the following as one atomic operation:
> 
> 1) Append an item to a list
> 2) Set a Boolean indicator


I doubt you have to worry at all about this in such simple single-single queue - if there is not a much more complex condition upon the insert order.
And what should the indicator tell? that a new element is there? 

The list itself tells its the length, its guaranteed to be increased _after_ .append()
And you can .pop(0) just so - catching/retring at Key/IndexError at least.

List .append() and .pop() will be atomic in any Python though its not mentioned explicitely - otherwise it would be time to leave Python.

There is also Queue.Queue - though it has unneccessary overhead for most purposes.


A function to block Python interpreter thread switching in such VHL language would be nice for reducing the need for spreading locks in some cases (huge code - little critical sections). Yet your example is by far not a trigger for this. I also requested that once. Implementation in non-C-Pythons may be difficult. 


Generally there is also technique for optimistic unprotected execution of critical sections - basically using an atomic counter and you need to provide code for unrolling half executions. Search Google.


Robert



> It would be almost like getting and holding the GIL,
> to prevent a thread swap out between the two operations.
> - sort of the inverted function than for which the GIL
> seems to be used, which looks like "let go", get control
> back via return from blocking I/O, and then "re - acquire"
> 
> Is this "reversed" usage possible?
> Is there some way to prevent thread swapping?
> 
> The question arises in the context of a multi threaded
> environment where the list is used as a single producer,
> single consumer queue - I can solve my problem in various
> ways, of which this is one, and I am curious as to if it is 
> possible to prevent a thread swap from inside the thread.
> 
> - Hendrik
> 


From sschwarzer at sschwarzer.net  Sat Jan  6 20:45:57 2007
From: sschwarzer at sschwarzer.net (Stefan Schwarzer)
Date: Sun, 07 Jan 2007 02:45:57 +0100
Subject: clarification on open file modes
In-Reply-To: <enke74$9j2$1@solaris.cc.vt.edu>
References: <enke74$9j2$1@solaris.cc.vt.edu>
Message-ID: <45A050D5.1070603@sschwarzer.net>

On 2007-01-05 03:46, tubby wrote:
> Is this the safest, most portable way to open files on any platform:
>
> fp = open(file_name, 'rb')
> fp.close()
>
> I understand that doing the following on Windows to a binary file (a
> jpeg or exe files for example) can cause file corruption, is that correct?
>
> fp = open(file_name, 'r')
> fp.close()

Rule of thumb: If the file is a text file (usually has a concept
of "text lines"), read and write it in text mode (without "b" in
the mode argument). So line endings will be converted, so that
your Python code can process the text data identically on all
platforms. On the other hand, if you process binary files (as you
mention, for example jpg or exe files), read and write them in
binary mode, so the data won't be corrupted.

> How can a simple open in read mode corrupt data???

You won't corrupt the data in the file, but you will kind of
corrupt the data that arrives in your program.

Stefan


From sjdevnull at yahoo.com  Mon Jan 29 18:07:14 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 29 Jan 2007 15:07:14 -0800
Subject: ctypes: Setting callback functions in C libraries
In-Reply-To: <1169704047.486695.157820@l53g2000cwa.googlegroups.com>
References: <1169704047.486695.157820@l53g2000cwa.googlegroups.com>
Message-ID: <1170112034.337112.109070@q2g2000cwa.googlegroups.com>

I realized my wrapping was broken, fixing that below...

On Jan 25, 12:47 am, "sjdevn... at yahoo.com" <sjdevn... at yahoo.com> 
wrote:
> I'm trying to wrap GNU readline withctypes(the Python readline
> library doesn't support the callback interface), but I can't figure out
> how to set values to a variable inside the library.  This is Python 2.5
> on Linux.  Here's what I have so far--if you comment out the memmove
> call (3 lines) it works as expected:
[SNIP]
> I need to assign ourfunc to RL_ATTEMPTED_COMPLETION_FUNCTION, but
> obviously simple assignment rebinds the name rather than assigning it
> to the C variable.
>
> Usingctypes.memmove to overwrite it(as I have here) will run the
> function but segfault when ourfunc goes to return (poking around with
> the debugger shows it's dying inctypes' callbacks.c at line 216, "keep
> = setfunc(mem, result, 0);" because setfunc is NULL).  I'm not entirely
> sure that's not because of some error in the prototyping or restype
> setting rather than as a result of memmove, but the memmove seems
> sketchy enough (only sets the function pointer itself presumably, not
> anything thatctypeswrappers need) that I'm looking for a better way
> to do it.
>
> As it is, returning rv directly or simply returning None causes the
> same segfault.
>
> Any idea?
>
> Thanks very much for your time!

# START
#!/usr/local/bin/python2.5
import ctypes

ctypes.cdll.LoadLibrary("libcurses.so")#, mode=ctypes.RTLD_GLOBAL)
ctypes.CDLL("libcurses.so", mode=ctypes.RTLD_GLOBAL)
ctypes.cdll.LoadLibrary("libreadline.so")
readline = ctypes.CDLL("libreadline.so")

RL_COMPLETION_FUNC_T = \
ctypes.CFUNCTYPE(ctypes.POINTER(ctypes.c_char_p),
        ctypes.c_char_p, ctypes.c_int, ctypes.c_int)
RL_LINE_BUFFER = ctypes.c_char_p.in_dll(readline, "rl_line_buffer")
RL_ATTEMPTED_COMPLETION_FUNCTION = \
RL_COMPLETION_FUNC_T.in_dll(readline,
"rl_attempted_completion_function")

def our_complete(text, start, end):
    print "Test", text, start, end
    rv = None
    arrtype = ctypes.c_char_p*4
    globals()["rv"] = arrtype("hello", "hatpin", "hammer", None)
    globals()["crv"]=ctypes.cast(rv, ctypes.POINTER(ctypes.c_char_p))
    return rv
ourfunc = RL_COMPLETION_FUNC_T(our_complete)

_readline = readline.readline
_readline.argtypes = [ctypes.c_char_p]
_readline.restype = ctypes.c_char_p

ctypes.memmove(ctypes.addressof(RL_ATTEMPTED_COMPLETION_FUNCTION),
               ctypes.addressof(ourfunc),
               4)
line = _readline("Input: ")
print "INPUT was: ", line
#END



From gagsl-py at yahoo.com.ar  Mon Jan 15 14:49:03 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 15 Jan 2007 16:49:03 -0300
Subject: How to write code to get focuse the application which is
	open from server
In-Reply-To: <1168887206.135633.182600@s34g2000cwa.googlegroups.com>
References: <1168143871.536432.252010@v33g2000cwv.googlegroups.com>
	<45a0dae2$0$8948$4c368faf@roadrunner.com>
	<1168837895.073936.270330@11g2000cwr.googlegroups.com>
	<m%Oqh.10311$pQ3.45@newsread4.news.pas.earthlink.net>
	<1168887206.135633.182600@s34g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20070115163649.03274e60@yahoo.com.ar>

At Monday 15/1/2007 15:53, vithi wrote:

>I am sorry that was a typing error. I try like that
>app.Print.OK.Click() but it was not working. The printer window was not
>IdentifiedIs their any method I can use to achive the same goal. How
>the window title was used as class name?. Could you please help me to
>solve this problem.

app.Print looks for a window whose title contains the word "Print" 
(does it exist?), inside, looks for a control with "OK" (presumably a 
button), and sends it a mouse click event.
There is a forum specific for pywinauto questions - see its homepage.


-- 
Gabriel Genellina
Softlab SRL  


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From subscriber100 at rjs.org  Mon Jan  8 00:44:55 2007
From: subscriber100 at rjs.org (Ray Schumacher)
Date: Sun, 07 Jan 2007 21:44:55 -0800
Subject: multi-threaded webcam with SimpleAsyncHTTPServer.py
Message-ID: <6.2.3.4.2.20070107203507.02e77240@pop-server.san.rr.com>

The class seems to work pretty well - very basic and fast, it just 
serves images from the specified port and camera device (USB cam).
I added an ImageServer class and some code to __main__

class ImageServer(RequestHandler):
     def __init__(self, conn, addr, server):
         asynchat.async_chat.__init__(self,conn)
         self.client_address = addr
         self.connection = conn
         self.server = server
         self.set_terminator ('\r\n\r\n')
         self.incoming = deque()
         self.outgoing = deque()
         self.rfile = None
         self.wfile = writewrapper(self.outgoing,
                       -self.use_buffer or self.blocksize)
         self.found_terminator = self.handle_request_line
         self.request_version = "HTTP/1.1"
         self.code = None

     def send_head(self):
         buff, width, height = cam.dev.getbuffer()
         imPIL = (Image.frombuffer("RGB", (width, height), buff,
                      "raw", "BGR", 0, -1) )
         imPIL.save(PILFile, "JPEG")
         self.send_response(200)
         self.send_header("Content-type", "image/jpeg")
         self.send_header("Content-Length: ", str(PILFile.len))
         self.end_headers()

         self.wfile.write(PILFile.getvalue())
         return


in __main__
...
     parser.add_option('-3', dest='server',
                       help='Run the server for only cam images',
                       action='store_const', const=3)
...
     if options.server==3:
         from StringIO import StringIO
         from PIL import Image
         if sys.platform == 'win32':
             import VideoCapture
             try:
                 del(cam)
                 gc.collect()
                 print "deleted old cam instance"
             except: pass
             cam = VideoCapture.Device(devnum=options.devNum,
                                            showVideoWindow=0)
             print cam
             buff, width, height = cam.dev.getbuffer()
             PILFile = StringIO()
         else:
             pass
     else:
         if options.root is None:
             parser.error("Need root path to start server")
         if not os.path.isdir(options.root):
             parser.error("Root path does not exist")
         os.chdir(options.root)

I run it with:
 >python SimpleAsyncHTTPServer.py -p8888 -3

I'll be trying implementing some streaming next.
Question, though: how can I unblock asyncore.loop(), or at least be 
able to interrupt it? To kill this server I need to hit CNTRL-C and 
then attempt to GET an image from Firefox, Python then throws 
KetboardInterrupt.

Note that I haven't tried it on *NIX so the sys.platform bit needs 
more implementing as well.

Other suggestions?

Ray
-------------- next part --------------
"""
    Get an updated version of this server from:
        http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440665
    
    
    Original pseudo-async* version by Pierre Quentel, available from
        http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/259148
    
    * It would only be async while reading requests, it would switch to a
    synchronous write to a socket when writing a response to a socket.  Ick.
    
    
    Features this version offers:
    1. Uses asynchronous reading and writing to/from sockets all the time.
    2. Performs sectioned reads from on-disk files, allowing for serving files of
       unlimited size.
    3. More informative logging.
    4. A quick wrapper for logging to a file and stdout/stderr.
    5. Trailing-slash redirects on directories.
    6. Optional built-in favicon.ico (to reduce the number of spurious log
       entries).
    7. Subclass which does not allow any directory lists or redirecting to
       /index.htm[l] .
    8. Subclass which does not allow any directory lists, but does automatic
       redirection to /index.htm[l] .
    9. Doesn't try to open reserved names on Windows.
    10. Has a tuning mechanism to change buffer performance depending on small
        or large files.
    
    For most people, one can run this from the command line and get a reasonably
    functioning web server with minor issue.
    
    I benchmarked this version in my personal projects folder, which contains
    around a gig of files, sizes ranging from a few kilobytes, to 100 megabytes.
    I then performed two concurrent "wget -m http://localhost/" calls (from
    different paths) on Windows 2k (machine is a P4 2.8ghz with hyperthreading,
    1.5 gigs memory, reading from an 80 gig SATA drive, writing to a 120 gig PATA
    drive).
    
    On small files, it was able to serve up 15-30 files/second. On larger (10+
    meg) files, it was able to serve up at 15+ megs/second (so says adding the
    speed reported by wget). The server never broke 7 megs of resident memory, and
    tended to hang below 10% processor utilization.
    
    There exists a live host running this web server: nada.ics.uci.edu
"""

import asynchat, asyncore, socket, SimpleHTTPServer
import sys, cgi, cStringIO, os, traceback, zlib, optparse

__version__ = ".5"

try:
    #Python 2.4 has a deque
    from collections import deque
except:
    #Python 2.3 and earlier don't
    #
    #limited deque, trimmed version of Raymond Hettinger's recipe:
    #http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/259179
    class deque(object):
        def __init__(self, iterable=()):
            self.left = self.right = 0
            self.data = {}
            self.extend(iterable)         
        
        def append(self, x):
            self.data[self.right] = x
            self.right += 1
        
        def appendleft(self, x):
            self.left -= 1        
            self.data[self.left] = x
        
        def pop(self):
            if self.left == self.right:
                raise IndexError('cannot pop from empty deque')
            self.right -= 1
            elem = self.data[self.right]
            del self.data[self.right]         
            return elem
        
        def popleft(self):
            if self.left == self.right:
                raise IndexError('cannot pop from empty deque')
            elem = self.data[self.left]
            del self.data[self.left]
            self.left += 1
            return elem
        
        def clear(self):
            self.data.clear()
            self.left = self.right = 0
        
        def extend(self, iterable):
            for elem in iterable:
                self.append(elem)
        
        def __len__(self):
            return self.right - self.left

reserved_names = dict.fromkeys(('com1 com2 com3 com4 com5 com6 com7 com8 com9 '
                                'lpt1 lpt2 lpt3 lpt4 lpt5 lpt6 lpt7 lpt8 lpt9 '
                                'con nul prn').split())

def popall(self):
    #Preallocate the list to save memory resizing.
    r = len(self)*[None]
    for i in xrange(len(r)):
        r[i] = self.popleft()
    return r        

class writewrapper(object):
    def __init__(self, d, blocksize=4096):
        self.blocksize = blocksize
        self.d = d
    def write(self, data):
        if self.blocksize in (None, -1):
            self.d.append(data)
        else:
            BS = self.blocksize
            xtra = 0
            if len(data)%BS:
                xtra = len(data)%BS + BS
            buf = self.d
            for i in xrange(0, len(data)-xtra, BS):
                buf.append(data[i:i+BS])
            if xtra:
                buf.append(data[-xtra:])
#
class ParseHeaders(dict):
    if 1:
        """Replacement for the deprecated mimetools.Message class
        Works like a dictionary with case-insensitive keys"""

    def __init__(self, infile, *args):
        self._ci_dict = {}
        lines = infile.readlines()
        for line in lines:
            k,v=line.split(":",1)
            self._ci_dict[k.lower()] = self[k] = v.strip()
        self.headers = self.keys()
    
    def getheader(self,key,default=""):
        return self._ci_dict.get(key.lower(),default)
    
    def get(self,key,default=""):
        return self._ci_dict.get(key.lower(),default)
#
class RequestHandler(asynchat.async_chat, SimpleHTTPServer.SimpleHTTPRequestHandler):
    if 1:
        server_version = "SimpleAsyncHTTPServer/"+__version__
        protocol_version = "HTTP/1.1"
        MessageClass = ParseHeaders
        blocksize = 4096
        
        #In enabling the use of buffer objects by setting use_buffer to True,
        #any data block sent will remain in memory until it has actually been
        #sent.
        use_buffer = False
        use_favicon = True
    
    def __init__(self, conn, addr, server):
        #print 'init RequestHandler'
        asynchat.async_chat.__init__(self,conn)
        self.client_address = addr
        self.connection = conn
        self.server = server
        # set the terminator : when it is received, this means that the
        # http request is complete ; control will be passed to
        # self.found_terminator
        self.set_terminator ('\r\n\r\n')
        self.incoming = deque()
        self.outgoing = deque()
        self.rfile = None
        self.wfile = writewrapper(self.outgoing, -self.use_buffer or self.blocksize)
        self.found_terminator = self.handle_request_line
        self.request_version = "HTTP/1.1"
        self.code = None
        # buffer the response and headers to avoid several calls to select()

    def update_b(self, fsize):
        if fsize > 1048576:
            self.use_buffer = True
            self.blocksize = 131072
    
    def collect_incoming_data(self,data):
        """Collect the data arriving on the connexion"""
        if not data:
            self.ac_in_buffer = ""
            return
        self.incoming.append(data)

    def prepare_POST(self):
        """Prepare to read the request body"""
        bytesToRead = int(self.headers.getheader('content-length'))
        # set terminator to length (will read bytesToRead bytes)
        self.set_terminator(bytesToRead)
        self.incoming.clear()
        # control will be passed to a new found_terminator
        self.found_terminator = self.handle_post_data
    
    def handle_post_data(self):
        """Called when a POST request body has been read"""
        self.rfile = cStringIO.StringIO(''.join(popall(self.incoming)))
        self.rfile.seek(0)
        self.do_POST()
            
    def do_GET(self):
        """Begins serving a GET request"""

        # Check for query string in URL
        qspos = self.path.find('?')
        if qspos>=0:
            self.body = cgi.parse_qs(self.path[qspos+1:], keep_blank_values=1)
            self.path = self.path[:qspos]

        #print self.path.find('confer')
        self.handle_data()
        
    def do_POST(self):
        """Begins serving a POST request. The request data must be readable
        on a file-like object called self.rfile"""
        ctype, pdict = cgi.parse_header(self.headers.getheader('content-type'))
        length = int(self.headers.getheader('content-length'))
        if ctype == 'multipart/form-data':
            self.body = cgi.parse_multipart(self.rfile, pdict)
        elif ctype == 'application/x-www-form-urlencoded':
            qs = self.rfile.read(length)
            self.body = cgi.parse_qs(qs, keep_blank_values=1)
        else:
            self.body = ''                   # Unknown content-type
        #self.handle_post_body()
        self.handle_data()

    def handle_data(self):
        """Class to override"""
        if self.use_favicon and self.path == '/favicon.ico':
            self.send_response(200)
            self.send_header("Content-type", 'text/html')
            self.send_header("Content-Length", len(favicon))
            self.end_headers()
            self.log_request(self.code, len(favicon))
            self.outgoing.append(favicon)
            self.outgoing.append(None)
            return
        
        f = self.send_head()
        if f:
            # do some special things with file objects so that we don't have
            # to read them all into memory at the same time...may leave a
            # file handle open for longer than is really desired, but it does
            # make it able to handle files of unlimited size.
            try:
                size = os.fstat(f.fileno())[6]
            except AttributeError:
                size = f.len
            self.update_b(size)
            self.log_request(self.code, size)
            self.outgoing.append(f)
        elif options.log:
            self.log_request(self.code)
        
        # signal the end of this request
        self.outgoing.append(None)

    def handle_request_line(self):
        """Called when the http request line and headers have been received"""
        # prepare attributes needed in parse_request()
        self.rfile = cStringIO.StringIO(''.join(popall(self.incoming)))
        self.rfile.seek(0)
        self.raw_requestline = self.rfile.readline()
        self.parse_request()

        if self.command in ['GET','HEAD']:
            # if method is GET or HEAD, call do_GET or do_HEAD and finish
            method = "do_"+self.command
            if hasattr(self,method):
                getattr(self,method)()
        elif self.command=="POST":
            # if method is POST, call prepare_POST, don't finish yet
            self.prepare_POST()
        else:
            self.send_error(501, "Unsupported method (%s)" %self.command)

    def end_headers(self):
        """Send the blank line ending the MIME headers, send the buffered
        response and headers on the connection"""
        if self.request_version != 'HTTP/0.9':
            self.outgoing.append("\r\n")

    def handle_error(self):
        traceback.print_exc(sys.stderr)
        self.close()

    def writable(self):
        return len(self.outgoing) and self.connected
    
    def handle_write(self):
        O = self.outgoing
        while len(O):
            a = O.popleft()
            #handle end of request disconnection
            if a is None:
                #Some clients have issues with keep-alive connections, or
                #perhaps I implemented them wrong.
                
                #If the user is running a Python version < 2.4.1, there is a
                #bug with SimpleHTTPServer:
                #    http://python.org/sf/1097597
                #So we should be closing anyways, even though the client will
                #claim a partial download, so as to prevent hung-connections.
                ## if self.close_connection:
                self.close()
                return
            #handle file objects
            elif hasattr(a, 'read'):
                _a, a = a, a.read(self.blocksize)
                if not a:
                    del _a
                    continue
                else:
                    O.appendleft(_a)
                    break
            #handle string/buffer objects
            elif len(a):
                break
        else:
            #if we get here, the outgoing deque is empty
            return
        #if we get here, 'a' is a string or buffer object of length > 0
        try:
            num_sent = self.send(a)
            if num_sent < len(a):
                if not num_sent:
                    # this is probably overkill, but it can save the
                    # allocations of buffers when they are enabled
                    O.appendleft(a)
                elif self.use_buffer:
                    O.appendleft(buffer(a, num_sent))
                else:
                    O.appendleft(a[num_sent:])

        except socket.error, why:
            if isinstance(why, (str, unicode)):
                self.log_error(why)
            elif isinstance(why, tuple) and isinstance(why[-1], (str, unicode)):
                self.log_error(why[-1])
            else:
                self.log_error(str(why))
            self.handle_error()
    
    def send_head(self):
        path = self.translate_path(self.path)
        if sys.platform == 'win32':
            if os.path.split(path)[1].lower().split('.')[0] in reserved_names:
                self.send_error(404, "File not found")
                return
        if os.path.isdir(path):
            if not self.path.endswith('/'):
                self.send_response(302)
                x = '<META HTTP-EQUIV="refresh" CONTENT="0;URL=%s/">'%self.path
                self.send_header("Content-Location", self.path + '/')
                self.send_header("Content-Length", len(x))
                self.end_headers()
                self.wfile.write(x)
                return None
        return SimpleHTTPServer.SimpleHTTPRequestHandler.send_head(self)
    
    def send_response(self, code, message=None):
        if self.code:
            return
        self.code = code
        if message is None:
            if code in self.responses:
                message = self.responses[code][0]
            else:
                message = ''
        if self.request_version != 'HTTP/0.9':
            self.wfile.write("%s %d %s\r\n" %
                             (self.protocol_version, code, message))
            #print 'send resp', (self.protocol_version, code, message)
        self.send_header('Server', self.version_string())
        self.send_header('Date', self.date_time_string())
    
    def log_message(self, format, *args):
        sys.stderr.write("%s - - [%s] %s \"%s\" \"%s\"\n" %
                         (self.address_string(),
                          self.log_date_time_string(),
                          format%args,
                          self.headers.get('referer', ''),
                          self.headers.get('user-agent', '')
                          ))
#
class OnlyExactFiles(RequestHandler):
    def send_head(self):
        path = self.translate_path(self.path)
        if os.path.isdir(path):
            self.send_error(404, "File not found")
            return None
        return RequestHandler.send_head(self)
#
class ExactFilesAndIndex(RequestHandler):
    def list_directory(self, path):
        self.send_error(404, "File not found")
        return None
#
class ImageServer(RequestHandler):
    def __init__(self, conn, addr, server):
        #print 'init ImageServer'
        asynchat.async_chat.__init__(self,conn)
        self.client_address = addr
        self.connection = conn
        self.server = server
        # set the terminator : when it is received, this means that the
        # http request is complete ; control will be passed to
        # self.found_terminator
        self.set_terminator ('\r\n\r\n')
        self.incoming = deque()
        self.outgoing = deque()
        self.rfile = None
        self.wfile = writewrapper(self.outgoing, -self.use_buffer or self.blocksize)
        self.found_terminator = self.handle_request_line
        self.request_version = "HTTP/1.1"
        self.code = None
    
    def send_head(self):
        buff, width, height = cam.dev.getbuffer()
        imPIL = (Image.frombuffer("RGB", (width, height), buff, "raw", "BGR", 0, -1) )
        imPIL.save(PILFile, "JPEG") 
        self.send_response(200)
        self.send_header("Content-type", "image/jpeg")
        self.send_header("Content-Length: ", str(PILFile.len))
        self.end_headers()
        
        self.wfile.write(PILFile.getvalue())
        return
#

class Server(asyncore.dispatcher):
    if 1:
        """Copied from http_server in medusa"""
    def __init__ (self, ip, port, handler):
        self.ip = ip
        self.port = port
        self.handler = handler
        asyncore.dispatcher.__init__ (self)
        self.create_socket (socket.AF_INET, socket.SOCK_STREAM)

        self.set_reuse_addr()
        self.bind ((ip, port))

        # Quoting the socket module documentation...
        # listen(backlog)
        #     Listen for connections made to the socket. The backlog argument
        #     specifies the maximum number of queued connections and should
        #     be at least 1; the maximum value is system-dependent (usually
        #     5).
        self.listen (5)

    def handle_accept (self):
        try:
            conn, addr = self.accept()
        except socket.error:
            self.log_info ('warning: server accept() threw an exception', 'warning')
            return
        except TypeError:
            self.log_info ('warning: server accept() threw EWOULDBLOCK', 'warning')
            return
        # creates an instance of the handler class to handle the request/response
        # on the incoming connexion
        self.handler(conn,addr,self)

favicon = zlib.decompress(
    'x\x9c\xb5\x93\xcdN\xdb@\x14\x85\x07\x95\x07\xc8\x8amYv\xc9#\xe4\x11x\x04\x96}'
    '\x8c\x88\x1dl\xa0\x9b\xb6A\xa2)\x0bVTB\xa9"\xa5?*I\x16\xad"\x84d\x84DE\x93'
    '\x14;v\xc01M\xe2$\x988\xb1l\x9d\xde;v\\\x03\x89TU\xea\xb5N\xe4\xb9\x9a\xef'
    '\x1c\xcfO\x84X\xa0\'\x95\x12\xf4\xbb,\x9e/\n\xb1$\x84xF\xa2\x16u\xc2>WzQ\xfc'
    '\xf7\xca\xad\xafo\x91T\xd2\x1ai\xe5\x1fx[\xf9\xf4\x01\xc57\xbb\xd8\xdf\xd8'
    '\x00\x8d\x11\xf9\x95\x12\xda\x9a\xc3\xae\xe5_\xbdDpk\x03\xc3\xaeT\xd0\xb3\xd0'
    '>?\x83Z\xfd\x86Z\xa5\x84\x1fG_\xa4\xe7\x1c^\xa9W\xbfJ\xfe\xb4\xf0\x0e^\xdb'
    '\x88}0 \xafA\x0f\xa3+c&O\xbd\xf4\xc1\xf6\xb6d\x9d\xc6\x05\xdcVSz\xb0x\x1c\x10'
    '\x0fo\x02\xc7\xd0\xe7\xf1%\xe5\xf3\xc78\xdb\xf9Y\x93\x1eI\x1f\xf8>\xfa\xb5'
    '\x8bG<\x8dW\x0f^\x84\xd9\xee\xb5~\x8f\xe1w\xaf{\x83\x80\xb2\xbd\xe1\x10\x83'
    '\x88\'\xa5\x12\xbcZ?9\x8e\xb3%\xd3\xeb`\xd4\xd2\xffdS\xb9\x96\x89!}W!\xfb\x9a'
    '\xf9t\xc4f\x8aos\x92\x9dtn\xe0\xe8Z\xcc\xc8=\xec\xf7d6\x97\xa3]\xc2Q\x1b(\xec'
    'd\x99_\x8dx\xd4\x15%\xce\x96\xf9\xbf\xacP\xd1:\xfc\xf1\x18\xbe\xeb\xe2\xaey'
    '\x89;]\xc5\xf1\xfb<\xf3\x99\xe9\x99\xefon\xa2\xdb6\xe5\x1c\xbb^\x8b}FV\x1b'
    '\x9es+\xb3\xbd\x81M\xeb\xd1\xe0^5\xf1\xbd|\xc4\xfca\xf2\xde\xf0w\x9cW\xabr.'
    '\xe7\xd9\x8dFx\x0e\xa6){\x93\x8e\x85\xf1\xb5\x81\x89\xd9\x82\xa1\x9c\xc8;\xf9'
    '\xe0\x0cV\xb8W\xdc\xdb\x83\xa9i\xb1O at g\xa6T*\xd3=O\xeaP\xcc(^\x17\xfb\xe4\xb3'
    'Y\xc9\xb1\x17{N\xf7\xfbo\x8b\xf7\x97\x94\xe3;\xcd\xff)\xd2\xf2\xacy\xa0\x9b'
    '\xd4g=\x11B\x8bT\x8e\x94Y\x08%\x12\xe2q\x99\xd4\x7f*\x84O\xfa\r\xb5\x916R'
)
# decide which type of server to run
which = (RequestHandler, OnlyExactFiles, ExactFilesAndIndex, ImageServer)

class to_logfile:
    if 1:
        fl = True
    def __init__(self, fileobj):
        self.f = fileobj
    def write(self, data):
        data = data.encode('utf-8')
        sys.__stdout__.write(data)
        self.f.write(data)
        if self.fl:
            self.f.flush()

if __name__=="__main__":
    usage = "usage: \%prog -r<root> [-p<port>] [-d<cam device#>] [-0|-1|-2]"
    
    parser = optparse.OptionParser(usage)
    parser.add_option('-r', '--root', dest='root',
                      help='Root path of the web server', action='store')
    parser.add_option('-p', '--port', dest='port', type='int',
                      help='Port to listen on (default 80)', default=80, action='store')
    parser.add_option('-d', '--dev', dest='devNum', type='int',
                      help='Device to serve images from (default 0)', default=0, action='store')
    parser.add_option('-l', '--log', dest='log', type='int',
                      help='log requests? (default 0)', default=0, action='store')
    parser.add_option('-0', dest='server', help='Run the standard server (default)',
                      action='store_const', const=0, default=0)
    parser.add_option('-1', dest='server',
                      help='Run the server which only serves exact file names specified',
                      action='store_const', const=1)
    parser.add_option('-2', dest='server',
                      help='Run the server which will serve exact files and directory->index files',
                      action='store_const', const=2)
    parser.add_option('-3', dest='server',
                      help='Run the server which will serve only cam images',
                      action='store_const', const=3)
    
    options, args = parser.parse_args()
    
    print 'server options:', options.server
    if options.server==3:
        from StringIO import StringIO
        from PIL import Image
        if sys.platform == 'win32':
            import VideoCapture
            try: 
                del(cam)
                gc.collect()
                print "deleted old cam instance"
            except: pass
            cam = VideoCapture.Device(devnum=options.devNum, showVideoWindow=0)
            print cam
            buff, width, height = cam.dev.getbuffer()
            PILFile = StringIO()
        else:
            pass
            # try http://laurent.pointal.org/python/projets/pyvideograb/index.pih
            # or fg
            #import fg
            #cam = fg.Grabber()
            #cam.set_source(options.devNum)
            # or video4linux.video_capture / v4lctl
    else:
        if options.root is None:
            parser.error("Need root path to start server")
        
        if not os.path.isdir(options.root):
            parser.error("Root path does not exist")
            
        os.chdir(options.root)
    req_handler = which[options.server]
    s=Server('',options.port,req_handler)
    print req_handler.__name__, "running on port", options.port, "with root path", options.root
    asyncore.loop()
    
    

From timr at probo.com  Tue Jan 23 02:33:44 2007
From: timr at probo.com (Tim Roberts)
Date: Tue, 23 Jan 2007 07:33:44 GMT
Subject: python grammar
References: <1169466630.014322.232500@l53g2000cwa.googlegroups.com>
Message-ID: <cfebr2hgilinu1hb3l2p1f5tfm1bjoni87@4ax.com>

"tpochep" <tpochep at mail.ru> wrote:
>
>In 'augop' non-terminal :
>
>http://docs.python.org/ref/augassign.html
>
>the delimiter '//=' was skipped. Why?

Probably an oversight.  //= is relatively new.

>In 'Boolean operations':
>
>http://docs.python.org/ref/Booleans.html
>
>In 'expression' rule - what does 'if', 'else' mean? I guess 'if' and
>'else' must be keywords, not non-terminals.

Yes, those refer to literal keywords.

I'd judge both of those as errors in the web page.  There is a link on the
page for reporting problems.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From smusnmrNOSPAM at yahoo.com  Thu Jan  4 04:56:43 2007
From: smusnmrNOSPAM at yahoo.com (siggi)
Date: Thu, 4 Jan 2007 10:56:43 +0100
Subject: pow() works but sqrt() not!?
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
	<1167899693.759071.51450@31g2000cwt.googlegroups.com>
	<enig9a$cncb$1@zam602.zam.kfa-juelich.de>
	<1167903337.816250.196540@51g2000cwl.googlegroups.com>
Message-ID: <enij0u$cnug$1@zam602.zam.kfa-juelich.de>

Thank you T?nis, both for the link and your patient explanation :-)

Siggi


"tonisk" <metsakuri at gmail.com> schrieb im Newsbeitrag 
news:1167903337.816250.196540 at 51g2000cwl.googlegroups.com...
> >if you want math functions to your current namespace use:
> >>> from math import *What is a "namespace" and what is the difference 
> >>> between ">>>import math"
> and ">>>from math import *" ?

for namespaces read this
http://www.network-theory.co.uk/docs/pytut/tut_68.html

import math creates new namespace "math" for names in that module, so
you can acess them by prefixing them with "math", like math.sqrt(9).
from math import * imports all names to your local scope, so you do not
have to prefix them, sqrt(9)

-- 
T?nis




From __peter__ at web.de  Mon Jan  8 12:13:14 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 08 Jan 2007 18:13:14 +0100
Subject: Walking The Right Path
References: <ghe974-gau2.ln1@eskimo.tundraware.com>
Message-ID: <entu38$kjn$00$1@news.t-online.com>

Tim Daneliuk wrote:

> IOW, is there a way to return a symlink-based path which contains
> the symlink pointer as is was *defined* not as it expands?

os.readlink()

Peter


From not at set.se  Thu Jan 25 13:50:44 2007
From: not at set.se (Daniel)
Date: Thu, 25 Jan 2007 19:50:44 +0100
Subject: While loop with "or"? Please help!
References: <1169720769.490434.91650@j27g2000cwj.googlegroups.com>
Message-ID: <epau5n$qo$1@aioe.org>

2007-01-25 11:26:09
wd.jonsson at gmail.com wrote in message
<1169720769.490434.91650 at j27g2000cwj.googlegroups.com>

> Hmm, my while loop with "or" doesn't seem to work as I want it to...

> How do I tell the while loop to only accept "Y" or "y" or "N" or 
"n"
> input from the str(raw_input)?
> 
> Thank's in advance!
> 
> Snippet of code:
> 
> import os
> 
> def buildfinder():
>     os.system("CLS")
>     GameRoot = os.getenv("GAME_ROOT") + "\\"
> 
>     print "Do you want to use " + GameRoot + " as your source
> directory?"
>     usr = str(raw_input('Y/N: '))
>     return usr
> 
> #Runs the buildfinder function
> usrinp = buildfinder()
> 
> def buildwhiler():
> 
>     while usrinp != "y" or "Y" or "N" or "n": <<<<----PROBLEM
>         print "Enter Y or N!"
>         usr = str(raw_input('Y/N: '))
>     else:
>         code continues

Thanks for the help everyone! :)
This forum rules!


From chris.cavalaria at free.fr  Thu Jan  4 05:21:27 2007
From: chris.cavalaria at free.fr (Christophe)
Date: Thu, 04 Jan 2007 11:21:27 +0100
Subject: Sorting on multiple values, some ascending, some descending
In-Reply-To: <1167855055.615746.105410@48g2000cwx.googlegroups.com>
References: <1167850127.745463.3520@k21g2000cwa.googlegroups.com>
	<1167852652.416990.158610@k21g2000cwa.googlegroups.com>
	<1167855055.615746.105410@48g2000cwx.googlegroups.com>
Message-ID: <459cd53c$0$308$426a74cc@news.free.fr>

bearophileHUGS at lycos.com a ?crit :
> Raymond Hettinger:
>> The simplest way is to take advantage of sort-stability and do
>> successive sorts.  For example, to sort by a primary key ascending and
>> a secondary key decending:
>>    L.sort(key=lambda r: r.secondary, reverse=True)
>>    L.sort(key=lambda r: r.primary)
> 
> That's probably the faster and simpler way.
> The following solution is probably slow, memory-hungry, and it's not
> tested much so it may be buggy too, but it shows my idea, and bugs can
> be fixed:
> 
> class Inverter:
>     def __init__(self, item, reversed=False):
>             self.item = item
>             self.reversed = reversed
>     def __cmp__(self, other):
>         if self.reversed:
>             return cmp(other.item, self.item)
>         else:
>             return cmp(self.item, other.item)
> 
> data = [[1, "a", "b"], [1, "b", "d"], [1, "d", "a"]]
> reverses = [True, False, False]
> 
> print sorted(data, key=lambda subseq: map(Inverter, subseq, reverses))

Nice trick, but don't get too caught up using classes ;) Try that one 
instead for much better performance :

class Inverter:
     def __init__(self, item):
         self.item = item
     def __cmp__(self, other):
         return cmp(other, self.item)

def invert_if(item, reversed=False):
     if reversed:
         return Inverter(item)
     return item

data = [[1, "a", "b"], [1, "b", "d"], [1, "d", "a"]]
reverses = [True, False, False]

print sorted(data, key=lambda subseq: map(invert_, subseq, reverses))


From exarkun at divmod.com  Thu Jan 18 12:46:59 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 18 Jan 2007 12:46:59 -0500
Subject: How to find out if another process is using a file
In-Reply-To: <eoob3t$3jn$1@sea.gmane.org>
Message-ID: <20070118174659.11447.1665846096.divmod.quotient.20979@ohm>

On Thu, 18 Jan 2007 14:34:52 -0300, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
>"Tom Wright" <tew24 at spam.ac.uk> escribi? en el mensaje
>news:eoo6vd$33u$1 at gemini.csx.cam.ac.uk...
>
>> I'm writing a program which reads a series of data files as they are
>> dumped
>> into a directory by another process.  At the moment, it gets sporadic bugs
>> when it tries to read files which are only partially written.
>>
>> I'm looking for a function which will tell me if a file is opened in
>> write-mode by another process - if it is, my program will ignore it for
>> now
>> and come back to it later.  This needs to work on linux and windows.  Mac
>> OS would be a bonus too.  An os-independent solution would be good, but I
>> could write os-specific options and have it pick the appropriate one.
>
>Use os.open with the O_EXCL flag; will fail if the other process has the
>file still open (and will fail if another process is reading the file, too,
>not just if someone is writing).

On what platform is this true?

A better solution is to name or place files which are begin written in a which is recognizable and only rename or move them to their final location when they have been completely written.

For example, name files ".new" as they are being written.  When they are fully written, drop the ".new" suffix.  On the reader side, ignore any file with a name ending in ".new".

Jean-Paul


From steven.bethard at gmail.com  Tue Jan 16 21:22:03 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 16 Jan 2007 19:22:03 -0700
Subject: [ANN] argparse 0.5 - Command-line parsing library
Message-ID: <d11dcfba0701161822o8e37c20n20daf17825c85c44@mail.gmail.com>

Announcing argparse 0.5
-----------------------

argparse home:
   http://argparse.python-hosting.com/

argparse single module download:
   http://argparse.python-hosting.com/file/trunk/argparse.py?format=raw

argparse bundled downloads at PyPI:
   http://www.python.org/pypi/argparse/

About this release
==================

This release adds support for required options, better support for
opening files (deprecating the 'outfile' type), better control over
help formatting and better support for negative number arguments.

New in this release
===================

* Required options may now be created by specifying required=True in
calls to add_argument.
  http://argparse.python-hosting.com/wiki/ArgumentParser/add_argument/required

* The 'outfile' type has been deprecated. Use the new FileType factory
which can be used to specify both file mode and buffer size, and knows
how to convert '-' into sys.stdin or sys.stout as appropriate. The
'outfile' type will be removed in a future release.
  http://argparse.python-hosting.com/wiki/FileType

* The ArgumentParser constructor now accepts a ``formatter_class``
keyword argument which can be set to
argparse.RawDescriptionHelpFormatter to keep argparse from
line-wrapping your description.

* The algorithm in parse_args() has been enhanced to understand that
negative numbers are usually positional arguments, not misspelled
optional arguments.

About argparse
==============

The argparse module is an optparse-inspired command line parser that
improves on optparse by:

* handling both optional and positional arguments
* supporting parsers that dispatch to sub-parsers
* producing more informative usage messages
* supporting actions that consume any number of command-line args
* allowing types and actions to be specified with simple callables
instead of hacking class attributes like STORE_ACTIONS or
CHECK_METHODS

as well as including a number of other more minor improvements on the
optparse API. To whet your appetite, here's a simple program that sums
its command-line arguments and writes them to a file::

    parser = argparse.ArgumentParser()
    parser.add_argument('integers', nargs='+', type=int)
    parser.add_argument('--log', default=sys.stdout,
                        type=argparse.FileType('w'))
    args = parser.parse_args()
    args.log.write('%s\n' % sum(args.integers))
    args.log.close()


From wleftwich at gmail.com  Thu Jan  4 07:33:00 2007
From: wleftwich at gmail.com (Wade Leftwich)
Date: 4 Jan 2007 04:33:00 -0800
Subject: Iterate through list two items at a time
References: <enf2he$2sr1@cnn.xsj.xilinx.com>
	<12pmahqc7kclbfc@corp.supernews.com>
	<1167882211.696350.271620@s34g2000cwa.googlegroups.com>
Message-ID: <1167913980.320964.264860@s34g2000cwa.googlegroups.com>


Wade Leftwich wrote:
> Jeffrey Froman wrote:
> > Dave Dean wrote:
> >
> > >  I'm looking for a way to iterate through a list, two (or more) items at a
> > > time.
> >
> > Here's a solution, from the iterools documentation. It may not be the /most/
> > beautiful, but it is short, and scales well for larger groupings:
> >
> > >>> from itertools import izip
> > >>> def groupn(iterable, n):
> > ...     return izip(* [iter(iterable)] * n)
> > ...
> > >>> list(groupn(myList, 2))
> > [(0, 1), (2, 3), (4, 5), (6, 7), (8, 9), (10, 11)]
> > >>> list(groupn(myList, 3))
> > [(0, 1, 2), (3, 4, 5), (6, 7, 8), (9, 10, 11)]
> > >>> list(groupn(myList, 4))
> > [(0, 1, 2, 3), (4, 5, 6, 7), (8, 9, 10, 11)]
> > >>> for a,b in groupn(myList, 2):
> > ...     print a, b
> > ...
> > 0 1
> > 2 3
> > 4 5
> > 6 7
> > 8 9
> > 10 11
> > >>>
> >
> > Jeffrey
>
> This works great except you lose any 'remainder' from myList:
>
> >>> list(groupn(range(10),3))
> [(0, 1, 2), (3, 4, 5), (6, 7, 8)]  # did not include (9,)
>
> The following might be more complex than necessary but it solves the
> problem, and like groupn()
> it works on infinite lists.
>
> from itertools import groupby, imap
> def chunk(it, n=0):
>     if n == 0:
>         return iter([it])
>     grouped = groupby(enumerate(it), lambda x: int(x[0]/n))
>     counted = imap(lambda x:x[1], grouped)
>     return imap(lambda x: imap(lambda y: y[1], x), counted)
>
> >>> [list(x) for x in chunk(range(10), 3)]
> [[0, 1, 2], [3, 4, 5], [6, 7, 8], [9]]
>
> Note the chunks are iterators, not tuples as in groupn():
>
> >>> [x for x in chunk(range(10), 3)]
> [<itertools.imap object at 0xb78d4c4c>,
>  <itertools.imap object at 0xb78d806c>,
>  <itertools.imap object at 0xb78d808c>,
>  <itertools.imap object at 0xb78d4c6c>]
>
>
> -- Wade Leftwich
> Ithaca, NY

Or, using generator expressions instead of imap and getting rid of the
lambdas --

from itertools import groupby

def chunk(it, n=0):
    if n == 0:
        return iter([it])
    def groupfun((x,y)):
        return int(x/n)
    grouped = groupby(enumerate(it), groupfun)
    counted = (y for (x,y) in grouped)
    return ((z for (y,z) in x) for x in counted)

>>> [list(x) for x in chunk(range(10), 3)]
[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9]]

>>> [x for x in chunk(range(10), 3)]
[<generator object at 0xb7a34e4c>,
 <generator object at 0xb7a34dac>,
 <generator object at 0xb7a34d2c>,
 <generator object at 0xb7a34d6c>]



From kw at codebykevin.com  Wed Jan 24 09:40:40 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Wed, 24 Jan 2007 09:40:40 -0500
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <ep60jp$63v$1@aioe.org>
References: <ep60jp$63v$1@aioe.org>
Message-ID: <45B76FE8.5080701@codebykevin.com>

Daniel Jonsson wrote:
> So, I've reached the point where my building pipeline tools actually 
> needs to be used by other people in my company. By this reason I 
> actually need to think about the usability, and I've come to the 
> conclusion that I need a GUI. So, which of the two packages should I 
> learn, and which one is easier to pick up? 
> Thanks in advance!
> 
> Daniel

I recommend Tkinter. By itself, Tkinter is too basic (it only supports
buttons, labels, frames, and so on), but if you add extension packages
such as Tablelist (for data display), Tile (for platform-native
theming), and TkTreeCtrl (for tree views), it can produce GUI's that are
just as rich as those available from wx or Qt.

Here are some links for more info:

Tile: http://tktable.sourceforge.net/tile
Tile for Tkinter: http://tkinter.unpythonic.net/wiki/TileWrapper

Tablelist: http://www.nemethi.de/
Tabelist for Tkinter (with Tile support):
http://tkinter.unpythonic.net/wiki/TableListTileWrapper

Tktreectrl: http://tktreectrl.sourceforge.net/
Treectrl for Tkinter: http://klappnase.zexxo.net/TkinterTreectrl/index.html

All these libraries are open-source and available under
commercial-friendly terms (BSD-style licenses).

I make heavy use of Tile and Tablelist in my applications. Tktreectrl is
incredibly powerful, but is also quite complex, and I have not used it
myself in an application.

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


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Jan 31 12:24:19 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 31 Jan 2007 18:24:19 +0100
Subject: "Correct" db adapter
In-Reply-To: <1170262532.590048.247580@a75g2000cwd.googlegroups.com>
References: <1170253666.826691.276800@s48g2000cws.googlegroups.com>
	<45c0b8cd$0$5072$ba4acef3@news.orange.fr>
	<mailman.3350.1170259167.32031.python-list@python.org>
	<1170262532.590048.247580@a75g2000cwd.googlegroups.com>
Message-ID: <45c0d078$0$435$426a74cc@news.free.fr>

king kikapu a ?crit :
> Thanks for the replies.
> 
> I think i do not need something like ORM, but just a db-module that i
> can "work" the database with it.

FWIW, SQLAlchemy is not an ORM, but an higher-level API for SQL 
integration. The ORM part is an optional feature built on top of this 
API. But I'm not sure SQLAlchemy supports SQL Server anyway !-)

> I just want to know if pyodbc is the "correct" solution to do so or if
> it is another db-module that is more
> usefull for this job.

AFAICT:

* there's an experimental MS SQL Server db-module:
http://www.object-craft.com.au/projects/mssql/

* the Win32 extensions offers support for ADO, but then it's not db-api 
compliant

* unless you use adodbapi, but I don't know if it's still supported 
(last release is 3+ years old):
http://adodbapi.sourceforge.net/

HTH


From uymqlp502 at sneakemail.com  Wed Jan 17 20:11:29 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: 17 Jan 2007 17:11:29 -0800
Subject: Units of measurement
In-Reply-To: <mailman.2854.1169072873.32031.python-list@python.org>
References: <7x8xg1xr62.fsf_-_@ruckus.brouhaha.com>
	<mailman.2854.1169072873.32031.python-list@python.org>
Message-ID: <1169082689.148793.312130@51g2000cwl.googlegroups.com>

Robert Kern wrote:
> Paul Rubin wrote:
> > I'm sure this has been done before, but it just struck my fancy, an
> > example of Python's "emulating numeric types", inspired by the old
> > Unix "units" utility, and the Frink language.
>
> Oh yeah, it's been done before. Several times over, in fact.

<cut>

> And there was another one announced here sometime in the past year or so, IIRC,
> but I don't recall the name of it or that of the author.  :-(

Perhaps you are referring to the scalar class at
http://RussP.us/scalar.htm

The nice thing about this one (which I wrote myself) is that after you
do your development and are ready for "production" runs, you can easily
disable the unit checks and get the efficiency of built-in numeric
types. That can be two orders of magnitude faster!

It comes with a complete user manual too (pdf and html). I'm using it
for my engineering work, and it's working great!



From m.elston at advantest-ard.com  Fri Jan  5 13:58:13 2007
From: m.elston at advantest-ard.com (Mark Elston)
Date: Fri, 05 Jan 2007 10:58:13 -0800
Subject: What is proper way to require a method to be overridden?
In-Reply-To: <1167978050.971481.111880@q40g2000cwq.googlegroups.com>
References: <1167965523.427735.167890@q40g2000cwq.googlegroups.com>
	<1167974907.497878.61070@i15g2000cwa.googlegroups.com>
	<mailman.2311.1167976761.32031.python-list@python.org>
	<1167978050.971481.111880@q40g2000cwq.googlegroups.com>
Message-ID: <12pt7nijd12dq5d@corp.supernews.com>

* Paddy wrote (on 1/4/2007 10:20 PM):
> belinda thom wrote:
> 
>> On Jan 4, 2007, at 9:28 PM, Carl Banks wrote:
>>
>>> jeremito wrote:
>>>> I am writing a class that is intended to be subclassed.  What is the
>>>> proper way to indicate that a sub class must override a method?
>>> You can't (easily).
>>>
>>> If your subclass doesn't override a method, then you'll get a big fat
>>> AttributeError when someone tries to call it.  But this doesn't stop
>>> someone from defining a subclass that fails to override the method.
>>> Only when it's called will the error show up.  You can, as others have
>>> noted, define a method that raises NotImplementedError.  But this
>>> still
>>> doesn't stop someone from defining a subclass that fails to override
>>> the method.  The error still only occurs when the method is called.
>>>
>>> There are some advantages to using NotImplementedError:
>>>
>>> 1. It documents the fact that a method needs to be overridden
>>> 2. It lets tools such as pylint know that this is an abstract method
>>> 3. It results in a more informative error message
>>>
>>> But, in the end, if someone wants to define a class that defiantly
>>> refuses to declare a method, you can't stop them.
>> This is the con of a dynamic language...
> In a language that has statements to force the user to over-ride a
> method when a class is sub-classed, what is to stop the lazy
> sub-classer from doing the equivalent of:
> 
>   define override_me(self, ...):
>     pass
> 
> And so get code through the compiler,, allowing them to 'meet their
> targets'?
> 

And this *could* be perfectly suitable if the class really doesn't make
use of the method.  (I have seen this in poorly designed super classes
and interface classes - sigh.)

> - Paddy.
> 


From http  Thu Jan 25 16:04:45 2007
From: http (Paul Rubin)
Date: 25 Jan 2007 13:04:45 -0800
Subject: Python does not play well with others
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<1169722875.237123.98680@v45g2000cwv.googlegroups.com>
	<1169726842.719104.304300@v45g2000cwv.googlegroups.com>
	<wC5uh.55952$wc5.17531@newssvr25.news.prodigy.net>
	<1169755188.989078.75510@v33g2000cwv.googlegroups.com>
	<7xveiudg4o.fsf@ruckus.brouhaha.com>
	<HL8uh.13092$ji1.4793@newssvr12.news.prodigy.net>
Message-ID: <7xzm864y36.fsf@ruckus.brouhaha.com>

John Nagle <nagle at animats.com> writes:
>     That's the problem.  We now have four SSL implementations for
> Python, none of which let you do all the things OpenSSL can do.

I'm aware of some OpenSSL wrappers plus TLSlite.  Am I missing a
couple more?  I guess maybe the OpenSSL wrappers also work on GnuTLS.

>     Can you build the built-in SSL package without building all of
> Python?  

I thought there was no built-in SSL package-- it just calls OpenSSL.


From firefoxxer at gmail.com  Fri Jan 12 15:05:24 2007
From: firefoxxer at gmail.com (Coby)
Date: 12 Jan 2007 12:05:24 -0800
Subject: How to respond to a confirmation prompt automatically
Message-ID: <1168632324.226733.130870@a75g2000cwd.googlegroups.com>

Just to give you some background about my problem:

I execute os.system(command), where command is a string.

On the command line in windows, I get:

"Continue, and unload these objects? [no]"

I need to respond 'y' to continue, but I am uncertain on how to output
the 'y' automatically.


Thanks in advance.



From rrr at ronadam.com  Thu Jan 18 10:57:42 2007
From: rrr at ronadam.com (Ron Adam)
Date: Thu, 18 Jan 2007 09:57:42 -0600
Subject: Module name to filename and back?
Message-ID: <eoo5m6$cr9$1@sea.gmane.org>


Is there a function to find a filename from a dotted module (or package) name 
without importing it?

The imp function find_module() doesn't work with dotted file names.  And it 
looks like it may import the file as it raises an ImportError error exception if 
  it can't find the module. (Shouldn't it raise an IOError instead?)

What I'm looking for is to be able to get the full module name when I have a 
filename.  And get the full filename when I have the module name.  And do both 
of these without importing the module.

    modulename <==> filename
    filename <==> modulename

Ron




From alexisbrion at gmail.com  Mon Jan  8 05:15:26 2007
From: alexisbrion at gmail.com (alex)
Date: 8 Jan 2007 02:15:26 -0800
Subject: How to get file name on a remote server with ftplib?
In-Reply-To: <1168009814.236723.105280@51g2000cwl.googlegroups.com>
References: <1168008952.020516.130890@s80g2000cwa.googlegroups.com>
	<1168009814.236723.105280@51g2000cwl.googlegroups.com>
Message-ID: <1168251326.729345.278600@38g2000cwa.googlegroups.com>

Thanks guys for the help! I used nlst().
The ftputil seems to be very helpfull, but getting a new library in an
organization like the one I work at  is big issue. Thanks anyway :)



wittempj at hotmail.com wrote:
> alex wrote:
> > Hello,
> >
> > My script is trying to get a file from a remote server, every day it
> > ftps from a directory. My code works perfect if I know the name of the
> > file in the remote directory.
> >
> > ftp.retrbinary('RETR ' + filename, handleDownload)
> >
> > The problem is that in the future the name of the file is going to be
> > aleatory. How can I get the file's name (only one file is in that
> > directory) and store it in a variable before executing ftp.retrbinary?
> >
> > Thanks a lot for your help,
> >
> > Alex
>
> You can use the nlst(dirname) method to retrieve a directory listing on
> the remote server. If the remote server doesn't support NLST command
> rhen you could do ftp.retrlines('LIST')  and parse the results to get a
> directory listing.



From martin.witte at gmail.com  Mon Jan 29 14:38:56 2007
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 29 Jan 2007 11:38:56 -0800
Subject: List Behavior when inserting new items
In-Reply-To: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
References: <1170097056.581394.249110@a75g2000cwd.googlegroups.com>
Message-ID: <1170099535.989235.35800@a75g2000cwd.googlegroups.com>

On Jan 29, 7:57 pm, "Drew" <olso... at gmail.com> wrote:
> I'm looking to add an element to list of items, however I'd like to
> add it at a specific index greater than the current size:
>
> list = [1,2,3]
> list.insert(10,4)
>
> What I'd like to see is something like:
>
> [1,2,3,,,,,,4]
>
> However I see:
>
> [1,2,3,4]
>
> Is there any way to produce this kind of behavior easily?
>
> Thanks,
> Drew

You could write your own class mimicing a list with your desired 
behaviour, something like:

py>class llist(object):
py>    def __init__(self, arg = []):
py>        self.__list = arg
py>    def __setitem__(self, key, value):
py>        length = len(self.__list)
py>        if  length < key:
py>            for i in range(length, key +1):
py>                self.__list.append(None)
py>        self.__list[key] = value
py>    def __str__(self):
py>        return str(self.__list)
py>
py>x = llist()
py>x[10] = 1
py>print x
[None, None, None, None, None, None, None, None, None, None, 1]

for other methods to add to the llist class see http://docs.python.org/
ref/sequence-types.html



From karoly.kiripolszky at gmail.com  Sun Jan 28 11:06:58 2007
From: karoly.kiripolszky at gmail.com (karoly.kiripolszky)
Date: 28 Jan 2007 08:06:58 -0800
Subject: howto redirect and extend help content ?
In-Reply-To: <1fc1a$45bcc7f4$d443bb3a$8806@news.speedlinq.nl>
References: <1fc1a$45bcc7f4$d443bb3a$8806@news.speedlinq.nl>
Message-ID: <1170000418.287748.107320@l53g2000cwa.googlegroups.com>

maybe you should make use of the objects' __doc__ attribute which 
holds the appropriate docstring. try to append something to it in the 
constructor. :)

more on this in the manual:

http://docs.python.org/tut/node11.html#SECTION0011300000000000000000

On Jan 28, 4:58 pm, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl> 
wrote:
> I'm making special versions of existing functions,
> and now I want the help-text of the newly created function to exists of
> 1. an extra line from my new function
> 2. all the help text from the old function
>
> # the old function
> def triang(M,sym=1):
>      """The M-point triangular window.    <== old help text
>      """
>      ....
>
> # the new function
> def chunked_triang(M):
>      """ Chunked version of "triang"      <== the extra line
>      """
>
>  >>> help(chunked_triang)
> # should give something like
>
> chunked_triang(M)                        <== the new definition
>      Chunked version of "triang"          <== the extra line
>      The M-point triangular window.       <== old help text
>
> Is that possible ?
>
> thanks,
> Stef Mientki



From dakman at gmail.com  Mon Jan 22 10:06:14 2007
From: dakman at gmail.com (dakman at gmail.com)
Date: 22 Jan 2007 07:06:14 -0800
Subject: module check
In-Reply-To: <1169477715.178874.223290@51g2000cwl.googlegroups.com>
References: <1169477715.178874.223290@51g2000cwl.googlegroups.com>
Message-ID: <1169478374.666968.160590@11g2000cwr.googlegroups.com>

I'm at work so I can't test this, but I do beleive the inspect module
can help you out. If it can't you can always try import the module
in a try-catch statement, catching ImportError, however ImportError may
be raised if the module you imported has trouble loading another
module, but it shouln't be to hard to track down where the ImportError
came from, a traceback object can give a lot more information than you
would believe.
Victor Polukcht wrote:
> Can anybody suggest a correct way of checking in python module exists
> and correctly installed from python program.



From adamgarstang at googlemail.com  Sun Jan 28 08:21:50 2007
From: adamgarstang at googlemail.com (Adam)
Date: 28 Jan 2007 05:21:50 -0800
Subject: Ip address
In-Reply-To: <mailman.3244.1169978684.32031.python-list@python.org>
References: <mailman.3244.1169978684.32031.python-list@python.org>
Message-ID: <1169990510.352536.4760@a34g2000cwb.googlegroups.com>

Hey,

This will get your IP address:

#######Code########
print socket.gethostbyaddr(socket.gethostname())
('compname', [], ['192.168.1.2'])
########End Code########

If you are wanting to to communicate over the internet you will have 
to get the IP of you rounter. So you will have to either find a way to 
talk to your router or try and use an online service like these other 
guys suggest.

On Jan 28, 9:54 am, Scripter47 <nos... at riddergarn.dk> wrote:
> How do i get my ip address?
>
> in cmd.exe i just type "ipconfig" then it prints:
>       ...
>       IP-address . . . . . . . . . . . . . . . . . : 192.168.1.10
>       ...
> how can i do that in python??



From bthom at cs.hmc.edu  Tue Jan  9 03:39:37 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Tue, 09 Jan 2007 00:39:37 -0800
Subject: private variables
In-Reply-To: <45a35032$0$319$426a34cc@news.free.fr>
References: <mailman.2463.1168321669.32031.python-list@python.org>
	<45a35032$0$319$426a34cc@news.free.fr>
Message-ID: <E4C1F1DD-01BD-47B4-9539-01FEF0101D82@cs.hmc.edu>


On Jan 9, 2007, at 12:20 AM, Bruno Desthuilliers wrote:

> belinda thom a ?crit :
>> Hello,
>>
>> In what version of python were private variables added?
>
> Which private variables ?

Haha.

The ones that are provided for convenience (via name mangling) that  
aren't really private if you wish to violate convention.

--b

From aahz at pythoncraft.com  Sat Jan  6 11:12:13 2007
From: aahz at pythoncraft.com (Aahz)
Date: 6 Jan 2007 08:12:13 -0800
Subject: Anyone persuaded by "merits of Lisp vs Python"?
References: <1167324666.002153.27570@a3g2000cwd.googlegroups.com>
	<1167986689.741094.252270@v33g2000cwv.googlegroups.com>
Message-ID: <enohot$j2s$1@panix3.panix.com>

In article <1167986689.741094.252270 at v33g2000cwv.googlegroups.com>,
Ant <antroy at gmail.com> wrote:
>
>So far? After a bit of pain getting started and finding decent docs
>(while waiting for the books to arrive) I've found the language quite
>easy to use. I haven't got into closures or macros yet - I need to get
>more familiar with the basics first, but first impressions are
>favorable. It seems that there is nothing conceptually in Python that I
>can't reasonably easily do in Lisp, but the Python syntax is much more
>straightforward for most of the basics I think (such as dictionaries,
>sets, list comprehensions etc), and the function/naming conventions for
>the core language is much clearer and more obvious than in Lisp.

Just remember: today is the car of the cdr of your life.

Once upon a time, I was working at a company that was a commercialized
MIT Lisp project rewritten in C.  One day I was amused to discover that
buried deep in the code were a pair of functions, car() and cdr()...
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Plus ca change, plus c'est la meme chose."


From rampeters at gmail.com  Wed Jan 31 12:10:33 2007
From: rampeters at gmail.com (johnny)
Date: 31 Jan 2007 09:10:33 -0800
Subject: Python **kwargs ?
Message-ID: <1170263432.199403.175290@k78g2000cwa.googlegroups.com>

What is **kwargs mean in python?  When you put double **, does it mean
passing by reference?

For example:
def redirect_to(request, url, **kwargs):



From jgodoy at gmail.com  Sun Jan  7 16:24:58 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 07 Jan 2007 19:24:58 -0200
Subject: strange for loop construct
References: <1168029548.217679.251230@q40g2000cwq.googlegroups.com>
	<mailman.2347.1168030198.32031.python-list@python.org>
	<12ptf5bl21f2teb@corp.supernews.com>
	<1168193206.598957.257700@38g2000cwa.googlegroups.com>
	<mailman.2396.1168198592.32031.python-list@python.org>
	<1168200211.928423.319260@38g2000cwa.googlegroups.com>
	<mailman.2398.1168200709.32031.python-list@python.org>
Message-ID: <87fyamzg0l.fsf@gmail.com>

skip at pobox.com writes:

>     Gabriel> Where do you find the "What's new" for previous releases? I
>     Gabriel> have to read them online.
>     >> 
>     >> Google for
>     >> >     what's new site:python.org
>
> Sorry, I took "I have to read them online" to mean that you needed to read
> them online because (perhaps) you don't have a source distribution on your
> computer.  My 2.5 source (Subversion sandbox) has 2.0 through 2.5 What's New
> source in Doc/whatsnew.

My SuSE installation has it as /usr/share/doc/packages/python/Misc/NEWS

-- 
Jorge Godoy      <jgodoy at gmail.com>


From emin.shopper at gmail.com  Thu Jan 11 07:59:46 2007
From: emin.shopper at gmail.com (Emin)
Date: 11 Jan 2007 04:59:46 -0800
Subject: what is the idiom for copy lots of params into self?
In-Reply-To: <1168481112.291651.89300@i39g2000hsf.googlegroups.com>
References: <1168469214.452389.221180@p59g2000hsd.googlegroups.com>
	<1168481112.291651.89300@i39g2000hsf.googlegroups.com>
Message-ID: <1168520386.457345.23680@i39g2000hsf.googlegroups.com>

Dear Luis and everyone else who responded,

Thanks for your suggestions. One issue with using *args or **kw is that
I might no want to copy all the arguments to __init__ into self.

What made me ask the question in my original post was not so much that
I had to loop over the names I wanted to save, but whether it's okay to
mess with self.__dict__ or if there is another way I should be
assigning to self.

Thanks,
-Emin

On Jan 10, 9:05 pm, "Luis M. Gonz?lez" <luis... at gmail.com> wrote:
> Emin wrote:
> > Dear Experts,
>
> > When writing large classes, I sometimes find myself needing to copy a
> > lot of parameters from the argument of __init__ into self. Instead of
> > having twenty lines that all basically say something like self.x = x, I
> > often use __dict__ via something like:
>
> > class example:
> >      def __init__(self,a,b,c,d,e,f,g,h,i,j,k,l,m,n):
> >          for name in
> > ['a','b','c','d','e','f','g','h','i','j','k','l','m','n']:
> >              self.__dict__[name] = locals()[name]
>
> > This saves a lot of code and makes it easier to see what is going on,
> > but it seems like there should be a better idiom for this task. Any
> > suggestions?
>
> > Thanks,
> > -EminHow about using variable length argumens?
>
> class example:
>         def __init__(self, *args):
>                 for i in args:
>                         self.__dict__[i] = i
> 
> x = example('uno','dos','tres')
> 
> Luis



From luismgz at gmail.com  Wed Jan 10 21:05:12 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 10 Jan 2007 18:05:12 -0800
Subject: what is the idiom for copy lots of params into self?
References: <1168469214.452389.221180@p59g2000hsd.googlegroups.com>
Message-ID: <1168481112.291651.89300@i39g2000hsf.googlegroups.com>

Emin wrote:
> Dear Experts,
>
> When writing large classes, I sometimes find myself needing to copy a
> lot of parameters from the argument of __init__ into self. Instead of
> having twenty lines that all basically say something like self.x = x, I
> often use __dict__ via something like:
>
> class example:
>      def __init__(self,a,b,c,d,e,f,g,h,i,j,k,l,m,n):
>          for name in
> ['a','b','c','d','e','f','g','h','i','j','k','l','m','n']:
>              self.__dict__[name] = locals()[name]
>
> This saves a lot of code and makes it easier to see what is going on,
> but it seems like there should be a better idiom for this task. Any
> suggestions?
>
> Thanks,
> -Emin


How about using variable length argumens?

class example:
	def __init__(self, *args):
		for i in args:
			self.__dict__[i] = i

x = example('uno','dos','tres')

Luis



From melih.onvural at gmail.com  Mon Jan 29 16:13:50 2007
From: melih.onvural at gmail.com (Melih Onvural)
Date: 29 Jan 2007 13:13:50 -0800
Subject: Executing Javascript, then reading value
In-Reply-To: <mailman.3277.1170104720.32031.python-list@python.org>
References: <1170103447.839304.44900@v33g2000cwv.googlegroups.com>
	<mailman.3277.1170104720.32031.python-list@python.org>
Message-ID: <1170105229.984079.219180@l53g2000cwa.googlegroups.com>

Thanks, let me check out this route, and then I'll post the results.

Melih Onvural

On Jan 29, 4:04 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On 29 Jan 2007 12:44:07 -0800, Melih Onvural <melih.onvu... at gmail.com> wrote:
>
> >I need to execute some javascript and then read the value as part of a
> >program that I am writing. I am currently doing something like this:Python doesn't include a JavaScript runtime.  You might look into the
> stand-alone Spidermonkey runtime.  However, it lacks the DOM APIs, so
> it may not be able to run the JavaScript you are interested in running.
> There are a couple other JavaScript runtimes available, at least.  If
> Spidermonkey is not suitable, you might look into one of them.
>
> Jean-Paul



From tjreedy at udel.edu  Tue Jan  9 13:37:44 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 9 Jan 2007 13:37:44 -0500
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org><50fudtF1g1nplU1@mid.individual.net><envur1$rq1$1@gemini.csx.cam.ac.uk>
	<1168350028.3722.3.camel@dot.uniqsys.com>
Message-ID: <eo0ndn$av8$1@sea.gmane.org>


"Carsten Haese" <carsten at uniqsys.com> wrote in message 
news:1168350028.3722.3.camel at dot.uniqsys.com...
| On Tue, 2007-01-09 at 11:38 +0000, Nick Maclaren wrote:
| > As Dan Bishop says, probably not.  The introduction to the decimal
| > module makes exaggerated claims of accuracy, amounting to propaganda.
| > It is numerically no better than binary, and has some advantages
| > and some disadvantages.
|
| Please elaborate. Which exaggerated claims are made, and how is decimal
| no better than binary?

As to the latter question: calculating with decimals instead of binaries 
eliminates conversion errors introduced when one has *exact* decimal 
inputs, such as in financial calculations (which were the motivating use 
case for the decimal module).  But it does not eliminate errors inherent in 
approximating reals with (a limited set of) ratrionals.  Nor does it 
eliminate errors inherent in approximation algorithms (such as using a 
finite number of terms of an infinite series.

Terry Jan Reedy





From afaNOSPAM at neuf.fr  Mon Jan  8 18:29:34 2007
From: afaNOSPAM at neuf.fr (Amaury Forgeot d'Arc)
Date: Tue, 09 Jan 2007 00:29:34 +0100
Subject: Getting started with Crystal Reports...little help in the far
	court.
In-Reply-To: <1168293388.349793.256790@s80g2000cwa.googlegroups.com>
References: <1168293388.349793.256790@s80g2000cwa.googlegroups.com>
Message-ID: <enuk4j$2j4g$1@talisker.lacave.net>

Good evening,

Mudcat a ?crit :
> I am not that familiar with Crystal Reports, but having read some other
> posts I know that the way to integrate the API with Python is through
> the COM interface provide by win32all.
> 
> However, I have been unable to find any other information on how to get
> started. I've used the COM interface before in integrating Excel and a
> couple of other things. So I am familiar with how that works. But there
> are at least 40 options dealing with Crystal and Business Objects. I
> have no idea which makepy file to create or which one provides the
> functionality I need.
> 
> I'm not looking to do much. All I'm really trying to do is provide one
> application where a list of crystal reports can be selected and ran in
> series. Right now we have a lot of reports that all have to be run
> manually (takes a while). So I think all I need api access to is server
> selection, parameter selection, and output formats.
> 
> Any pointers in the right direction would be helpful.


In my previous job we had to to almost the same thing.
If I remember correctly, for batch printing or file export it was enough 
to start with the "CrystalRuntime.Application" class.

It was something along these lines (sorry I don't have any way to test 
it now.):
     app = win32com.client.dynamic.Dispatch("CrystalRuntime.Application")
     report = app.OpenReport("c:/path/to/file.rpt")
     for table in report.Database.Tables:
         table.ConnectionInfo.Password = "passwd"
     ...
The rest is modeled after Visual Basic. There are tons of examples on 
the net.

If you want to show the report on the screen then it is another story.
I only remember the following:
- the application must be a mfc application
- I had to "makepy" a class. I think it was "CrystalReportsViewer".
- create a class derived from both pywin.mfc.activex.Control and 
CrViewer (look at the script generated by makepy).
- create a pywin.mfc.Frame, and put there an instance of the previous class.

Voil?, it's not much.
In the hope that you can do something with it.
But don't give up. At the end, it works...

-- 
Amaury


From aboudouvas at panafonet.gr  Wed Jan 31 11:55:32 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 31 Jan 2007 08:55:32 -0800
Subject: "Correct" db adapter
In-Reply-To: <mailman.3350.1170259167.32031.python-list@python.org>
References: <1170253666.826691.276800@s48g2000cws.googlegroups.com>
	<45c0b8cd$0$5072$ba4acef3@news.orange.fr>
	<mailman.3350.1170259167.32031.python-list@python.org>
Message-ID: <1170262532.590048.247580@a75g2000cwd.googlegroups.com>

Thanks for the replies.

I think i do not need something like ORM, but just a db-module that i
can "work" the database with it.
I just want to know if pyodbc is the "correct" solution to do so or if
it is another db-module that is more
usefull for this job.



From http  Tue Jan 23 05:27:08 2007
From: http (Paul Rubin)
Date: 23 Jan 2007 02:27:08 -0800
Subject: Noob Question: Force input to be int?
References: <1169546377.017596.43840@k78g2000cwa.googlegroups.com>
Message-ID: <7xac0arqbn.fsf@ruckus.brouhaha.com>

wd.jonsson at gmail.com writes:
>     print "Select a build number from 0 to " + str(len(BuildList) - 1)
>     buildNum = int(raw_input('Select build #> '))
> 
>     while buildNum > (len(BuildList) -1) or buildNum <= -1:
>         print
>         print "Error: Invalid build number!"
>         print "Select a build number from 0 to " + str(len(BuildList) - 1)
>         print
>         buildNum = int(raw_input('Select build: '))
> 
> The problem is with the while buildNum-loop. If the user enters a
> non-numeric value in the buildNum input, the scripts throws an
> exception. I need to constrict the user to ONLY use integers in the
> input box. How can I solve this issue?

You can either validate the input string before trying to convert
it ("look before you leap") or attempt conversion and handle the
exception if you get one ("it's easier to ask forgiveness than
permission").  The second pattern is generally preferable since it
means you don't duplicate input validation logic all over your
program.

The below is untested but is a partial rewrite of your code above,
intended to illustrate a few normal Python practices (I hope I haven't
introduced bugs) besides the input checking:

     # just loop til you get a valid number, reading the number at the
     # top of the loop.  No need to read it in multiple places.
     while True:
        # you don't have to convert int to str for use in a print statement.
        # the print statement takes care of the conversion automatically.
        print "Select a build number from 0 to", len(BuildList) - 1
        buildNumStr = raw_input('Select build #> ')

        # attempt conversion to int, which might fail; and catch the
        # exception if it fails
        try:
           buildNum = int(buildNumStr)
        except ValueError:
           buildNum = -1    # just treat this as an invalid value

        # you can say a < x < b instead of (a < x) and (x < b)
        if 0 <= buildNum < len(BuildList):
           break   # you've got a valid number, so exit the loop

        # print error message and go back to top of loop
        print
        print "Error: Invalid build number!"


From ivoras at fer.hr  Fri Jan  5 05:58:27 2007
From: ivoras at fer.hr (Ivan Voras)
Date: Fri, 05 Jan 2007 11:58:27 +0100
Subject: wxWindows off-screen?
Message-ID: <enlb0j$qrd$1@news1.carnet.hr>

Is it possible to draw a widget or a window in an off-screen buffer?
What I'm trying to do is capture rendered HTML to a bitmap (in other
words, something like html2bitmap) by using wxWindows' HTML widget. If
anyone has a different way of doing it, I'd be glad to hear it...


From jason at tishler.net  Wed Jan 24 10:23:04 2007
From: jason at tishler.net (Jason Tishler)
Date: Wed, 24 Jan 2007 10:23:04 -0500
Subject: sys.path issue in cygwin
In-Reply-To: <001801c73fc3$f8c410c0$1400a8c0@mytomato>
References: <002401c73f8f$b9f7da90$14fd0179@WANGSHUHAO>
	<20070124124355.GA1308@tishler.net>
	<001801c73fc3$f8c410c0$1400a8c0@mytomato>
Message-ID: <20070124152304.GA3668@tishler.net>

Wang,

Please keep your replies on-list.

On Wed, Jan 24, 2007 at 10:28:51PM +0800, Wang Shuhao wrote:
> > Why not use the Python that is part of the standard Cygwin
> > distribution?
> > 
> Cause the Cygwin version python has the same problem, that why I try
> to build python from source.

The above implies that you may have a Cygwin installation problem that
may impact other Cygwin applications too.  I recommend taking this
problem to the Cygwin list:

    http://cygwin.com/problems.html

FWIW, I get the following with the official Cygwin Python version:

    $ python -c 'import sys; print sys.path'
    ['', '/usr/lib/python24.zip', '/usr/lib/python2.4', '/usr/lib/python2.4/plat-cygwin', '/usr/lib/python2.4/lib-tk', '/usr/lib/python2.4/lib-dynload', '/usr/lib/python2.4/site-packages']

> But finally I found the solution, the PYTHONHOME environment variable
> controls the content of initial sys.path. Thanks anyway.
> export PYTHONHOME=/usr/localWang Shuhao

IMO, the above is just a workaround, not a solution.

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From mail at microcorp.co.za  Sat Jan 20 01:51:49 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 20 Jan 2007 08:51:49 +0200
Subject: OT Annoying Habits (Was: when format strings attack)
References: <mailman.2916.1169240529.32031.python-list@python.org>
	<pan.2007.01.20.02.22.52.492763@REMOVE.THIS.cybersource.com.au>
Message-ID: <01bc01c73c5f$75e8cfe0$03000080@hendrik>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> wrote:

> Or perhaps I should say:
> 
> .snoitnevnoc
> hsilgnE tpada )ylbissop revenehw( dluohs ew os dna ,naitraM ton ,puorgswen
> egaugnal hsilgnE na no er'ew ,segaugnal hcus era ereht fi neve tuB

First I thought it was Welsh or Cornish or something.

Then it was like being in my first year of school again-
reading letter by letter.  Never realised how difficult it is.

I suppose it will improve with practice.

- Hendrik



From smusnmrNOSPAM at yahoo.com  Sat Jan 13 04:01:01 2007
From: smusnmrNOSPAM at yahoo.com (Siggi)
Date: Sat, 13 Jan 2007 10:01:01 +0100
Subject: how to clean sys.path
References: <eo0eom$cirq$1@zam602.zam.kfa-juelich.de>
	<p3pbq2h0gaa9qkrl03iansir43vjjp00k7@4ax.com>
	<eo5hpp$2tmo$1@zam602.zam.kfa-juelich.de>
	<i8qgq251rtpmvsul05v9jb1dj946skf1mc@4ax.com>
Message-ID: <eoa6vq$927m$1@zam602.zam.kfa-juelich.de>


"Tim Roberts" wrote:

>wxDemos contains the demos.  The "wx" module lives in
>site-packages\wx-2.8-msw-ansi.  Did you leave that in?

Yes! Even on this computer I am writing now with - where the whole Python
programs stuff is in a programs folder, such as

C:\Programs\Python25\Lib\site-packages\wx-2.8-msw-ansi

- it is the same problem!


> "siggi" <smusnmrNOSPAM at yahoo.com> wrote:
>>
>>or in plain DOS:
>>
>>C:\Documents and Settings\User\My Documents\My Python files
>>C:\Documents and Settings\User\My Documents\Python25\Lib\idlelib
>>C:\Documents and Settings\User\My Documents\Python25\python25.zip
>>C:\Documents and Settings\User\My Documents\Python25\DLLs
>>C:\Documents and Settings\User\My Documents\Python25\lib
>>C:\Documents and Settings\User\My Documents\Python25\lib\plat-win
>>C:\Documents and Settings\User\My Documents\Python25\lib\lib-tk
>>C:\Documents and Settings\User\My Documents\Python25
>>C:\Documents and Settings\User\My Documents\Python25\lib\site-packages
>>C:\Documents and Settings\User\My Documents\Python25\lib\site-packages\PIL
>>C:\Documents and Settings\User\My
>>Documents\Python25\lib\site-packages\win32
>>C:\Documents and Settings\User\My
>>Documents\Python25\lib\site-packages\win32\lib
>>C:\Documents and Settings\User\My
>>Documents\Python25\lib\site-packages\Pythonwin
>>C:\Documents and Settings\User\My
>>Documents\Python25\lib\site-packages\wx-2.8-msw-ansi
>>
>>...it just looked horrible to me at first sight!
>
> It looks horrible to me, too.  That's why I install applications like that
> in "\Apps" instead of a document off of Documents and setings.  This looks
> much better:
>
> C:\Documents and Settings\User\My Documents\My Python files
> C:\Apps\Python25\Lib\idlelib
> C:\Apps\Python25\python25.zip
> C:\Apps\Python25\DLLs
> C:\Apps\Python25\lib
> C:\Apps\Python25\lib\plat-win
> C:\Apps\Python25\lib\lib-tk
> C:\Apps\Python25
> C:\Apps\Python25\lib\site-packages
> C:\Apps\Python25\lib\site-packages\PIL
> C:\Apps\Python25\lib\site-packages\win32
> C:\Apps\Python25\lib\site-packages\win32\lib
> C:\Apps\Python25\lib\site-packages\Pythonwin
> C:\Apps\Python25\lib\site-packages\wx-2.8-msw-ansi
>
> Searching these doesn't really take very long.  Remember that it doesn't
> have to read all the files -- it only has to read the directories.
>
>>'C:\Documents and Settings\User\My Documents\My Python files',
>>'C:\Documents
>>and Settings\User\My Documents\My Python files\wxDemos'. Now \wxDemos\ is
>>being searched very early.
>>
>>... no way! After running AnalogClock.py again, this error message
>>appears:
>>
>>------------------------------------------
>>Traceback (most recent call last):
>>  File "C:\Documents and Settings\My Documents\My Python
>>files\wxAnalogClock.py", line 14, in <module>
>>    import wx
>>ImportError: No module named wx.
>>------------------------------------------
>>
>>Very strange! Because all this wx stuff IS IN the directory 'C:\Documents
>>and Settings\User\My Documents\My Python files\wxDemos'. And
>>AnalogClock.py
>>does work when residing in that directory.
>
> wxDemos contains the demos.  The "wx" module lives in
> site-packages\wx-2.8-msw-ansi.  Did you leave that in?
> -- 
> Tim Roberts, timr at probo.com
> Providenza & Boekelheide, Inc.






From horpner at yahoo.com  Thu Jan 18 08:50:12 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: 18 Jan 2007 13:50:12 GMT
Subject: One more regular expressions question
References: <1169113767.320500.71200@11g2000cwr.googlegroups.com>
	<eonhct$77p$1@cernne03.cern.ch>
	<1169117912.193536.321260@a75g2000cwd.googlegroups.com>
Message-ID: <slrneqv22m.b0.horpner@FIAD06.norwich.edu>

On 2007-01-18, Victor Polukcht <vpolukcht at gmail.com> wrote:
> My pattern now is:
>
> (?P<var1>[^(]+)(?P<var2>\d+)\)\s+(?P<var3>\d+)
>
> And i expect to get:
>
> var1 = "Unassigned Number "
> var2 = "1"
> var3 = "32"
>
> I'm sure my regexp is incorrect, but can't understand where
> exactly.

Break it up using verbose notation to help yourself. Also, use
more helpful names. With names like var1 and var2 you might as
well not used named groups.

r = re.compile(r"""(?x)
    (?P<error> [^(]+ )
    (?P<errno> \d+ )
    \)
    \s+
    (?P<lineno> \d+ )""")

This way it's clearer that there's a \) with no matching \(.

-- 
Neil Cerutti
This team is one execution away from being a very good basketball team. --Doc
Rivers

-- 
Posted via a free Usenet account from http://www.teranews.com



From reply at group.invalid  Tue Jan 30 01:34:17 2007
From: reply at group.invalid (Pom)
Date: Tue, 30 Jan 2007 06:34:17 GMT
Subject: emulate a serial port in windows (create a virtual 'com' port)
Message-ID: <JFBvh.316977$TU3.6290485@phobos.telenet-ops.be>

Hello


how can I emulate a serial port in windows?  I want to intercept data 
sent to a 'com'port by a proprietary program.  It sends statistics to a 
serial display, and I want that data in my python program (that display 
isn't needed).

Is this possible?

I've seen this kind of serial ports being created when using USB and 
bleutooth adapters, so i guess it's possible ???


Thanks in advance


Greets


Pom


From deets at nospam.web.de  Wed Jan 17 10:48:41 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 17 Jan 2007 16:48:41 +0100
Subject: Python Web Frameworks
References: <1169048071.353887.279160@q2g2000cwa.googlegroups.com>
Message-ID: <516uqpF1epsqpU2@mid.uni-berlin.de>

Shortash wrote:

> Python Web Frameworks

weak google skills you have, young friend.

http://wiki.python.org/moin/WebFrameworks

Diez


From rzantow at gmail.com  Wed Jan 31 21:35:30 2007
From: rzantow at gmail.com (rzed)
Date: Wed, 31 Jan 2007 21:35:30 -0500
Subject: win32com.client
References: <1170278964.738118.219600@k78g2000cwa.googlegroups.com>
Message-ID: <Xns98C9DBA782100rzantowgmailcom@208.49.80.253>

"vithi" <vithi99 at hotmail.com> wrote in
news:1170278964.738118.219600 at k78g2000cwa.googlegroups.com: 

> Hi
> Any one tell me where I can get (or download) python modules
> win32com or win32com.client because I have to use "Dispatch" 
> thanks 
> 

What distribution are you using? If you are using Windows and have 
downloaded the Python.org one, then, as Gary has told you:
"You want the "python for windows" extension, available from   
http://sourceforge.net/projects/pywin32/"

I think the ActiveState distro includes it as part of its package. 

I don't know if any of this applies if you are using Linux, VMS, etc.

-- 
rzed


From CedricCicada at gmail.com  Fri Jan 19 10:48:54 2007
From: CedricCicada at gmail.com (CedricCicada at gmail.com)
Date: 19 Jan 2007 07:48:54 -0800
Subject: My first try using logger didn't work.  Why?
Message-ID: <1169221734.071338.107190@11g2000cwr.googlegroups.com>

Greetings!

I want to write messages into the Windows event log.  I found
sevicemanager, but the source is always "Python Service", and I'd like
to be a bit more descriptive.  Poking around on the Internet revealed
the existence of the logging module.  It seems to have easily
understood methods with the power I need.  So I tried it.  Here's my
attempt:

            logger = logging.getLogger("TahChung Part 1")
            logger.setLevel(logging.INFO)
            eventHandler = logging.NTEventLogHandler()
            eventHandler.setlevel(logging.INFO)
            formatter = logging.Formatter("%(message)s")
            eventHandler.setFormatter(formatter)

            logger.addHandler(eventHandler)
            logger.error("This comes from the logger object.")

I get no error messages from this, but I also don't get anything in my
event log.  What am I doing wrong?

By the way, my source of instructions for how to do this was:
http://www.onlamp.com/pub/a/python/2005/06/02/logging.html

Rob Richardson
RAD-CON, Inc.



From torriem at chem.byu.edu  Mon Jan 29 19:19:41 2007
From: torriem at chem.byu.edu (Michael L Torrie)
Date: Mon, 29 Jan 2007 17:19:41 -0700
Subject: Excellent Interview with Dennis D'Souza, full of laughs
In-Reply-To: <1170114420.772278.7130@a75g2000cwd.googlegroups.com>
References: <1170083292.991070.79560@v33g2000cwv.googlegroups.com>
	<45be1d27$0$97248$892e7fe2@authen.yellow.readfreenews.net>
	<1170087497.071441.118560@s48g2000cws.googlegroups.com>
	<6Mqvh.5640$fC2.95@bignews4.bellsouth.net>
	<1170114420.772278.7130@a75g2000cwd.googlegroups.com>
Message-ID: <1170116381.6907.20.camel@contra>

On Mon, 2007-01-29 at 15:47 -0800, thermate at india.com wrote:
> <stuff>
I know this is a useless gesture, but my normal tolerance for such
behavior has reached an end.

Please stop spamming this list with off-topic profanities.  Your
ramblings have nothing to do with programming in Python (this is a
computer-related group by the way) and grow tiresome.  I generally
tolerate occasional off-topic posts because they can be intelligent,
witty, diverting, and sometimes informative and educational.  However
your posts are none of these things.  There are plenty of forums out
there for you to vent your frustrations and express your beliefs and
opinions.  Kindly take your musings elsewhere, particularly when you
have to resort to using profanity to make up for your lack of elegant
expression and inability to argue a point, or even present a point.

Should this become more of a problem, I would vote in favor of moving
this newsgroup to being moderated.  In fact, I'd be in favor of shutting
down the newsgroup entirely and using the members-only mailing list
exclusively, although I know a number of people here would oppose that.



From metaperl at gmail.com  Thu Jan 11 10:26:15 2007
From: metaperl at gmail.com (metaperl)
Date: 11 Jan 2007 07:26:15 -0800
Subject: ValueError from dict - some detail would be helpful
Message-ID: <1168529175.794131.109390@77g2000hsv.googlegroups.com>

  File "/sw/lib/python2.5/csv.py", line 120, in _dict_to_list
    raise ValueError, "dict contains fields not in fieldnames"


--- it would be nice if it said what field it was

I know that I can do a set difference on the two myself, but since it
know what wasn't there.. why not report it and save me some time?



From paul.sijben at xs4all.nl  Wed Jan 10 09:43:23 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Wed, 10 Jan 2007 15:43:23 +0100
Subject: maximum number of threads
In-Reply-To: <mailman.2531.1168438769.32031.python-list@python.org>
References: <mailman.2531.1168438769.32031.python-list@python.org>
Message-ID: <45A4FB8B.60508@xs4all.nl>

All thanks for all the input! This was very informative.

Looks like I indeed need stackless as my code benefits from being
concurrently designed.

Paul

Jean-Paul Calderone wrote:
> On Wed, 10 Jan 2007 12:11:59 -0200, Felipe Almeida Lessa
> <felipe.lessa at gmail.com> wrote:
>> On 1/10/07, Laurent Pointal <laurent.pointal at limsi.fr> wrote:
>>> This is a system configurable limit (up to a maximum).
>>>
>>> See ulimit man pages.
>>>
>>> test
>>>
>>>         ulimit -a
>>>
>>> to see what are the current limits, and try with
>>>
>>>         ulimit -u 2000
>>>
>>> to modify the maximum number of user process (AFAIK each thread use a
>>> process entry on Linux)
>>
>> I don't think it's only this.
> 
> Indeed you are correct.  The actual limit you are hitting is the size
> of your address space.  Each thread is allocated 8MB of stack.  382
> threads consumes about 3GB of address space.  Even though most of this
> memory isn't actually allocated, the address space is still used up.  So,
> when you try to create the 383rd thread, the kernel can't find anyplace
> to put its stack.  So you can't create it.
> 
> Try reducing your stack size or reducing the number of threads you create.
> There's really actually almost no good reason to have this many threads,
> even though it's possible.
> 
>    exarkun at charm:~$ python Desktop/test.py
>    50
>    100
>    150
>    200
>    250
>    300
>    350
>    Exception raised: can't start new thread
>       Biggest number of threads: 382
>    exarkun at charm:~$ ulimit -Ss 4096
>    exarkun at charm:~$ python Desktop/test.py
>    50
>    100
>    150
>    200
>    250
>    300
>    350
>    400
>    450
>    500
>    550
>    600
>    650
>    700
>    750
>    Exception raised: can't start new thread
>       Biggest number of threads: 764
>    exarkun at charm:~$
>    Jean-Paul


From oliphant.travis at ieee.org  Wed Jan 17 16:49:08 2007
From: oliphant.travis at ieee.org (Travis Oliphant)
Date: Wed, 17 Jan 2007 14:49:08 -0700
Subject: why scipy cause my program slow?
In-Reply-To: <eoi2lt$26h$1@sea.gmane.org>
References: <1168935124.912419.147250@a75g2000cwd.googlegroups.com>
	<eoi2lt$26h$1@sea.gmane.org>
Message-ID: <eom5kl$4pa$1@sea.gmane.org>

Robert Kern wrote:
> HYRY wrote:
> 
>>Why the exec time of test(readdata()) and test(randomdata()) of
>>following program is different?
>>my test file 150Hz10dB.wav has 2586024 samples, so I set randomdata
>>function
>>to return a list with 2586024 samples.
>>the exec result is:
>>2586024
>><type 'list'>
>>10.8603842736
>>2586024
>><type 'list'>
>>2.16525233979
>>test(randomdata()) is 5x faster than test(readdata())
>>if I remove "from scipy import *" then I get the following result:
>>2586024
>><type 'list'>
>>2.21851601473
>>2586024
>><type 'list'>
>>2.13885042216
>>
>>So, what the problem with scipy?
> 
> 
> You're importing (through scipy) numpy's sum() function. The result type of that
> function is a numpy scalar type. The set of scalar types was introduced for a
> number of reasons, mostly having to do with being able to represent the full
> range of numerical datatypes that Python does not have builtin types for.
> Unfortunately, the code paths that get executed when arithmetic is performed
> sith such scalars are still suboptimal; I believe they are still going through
> the full ufunc machinery.

This should not be true in the 1.0 release of NumPy.  The numpy scalars 
do their own math which has less overhead than ufunc-based math.  But, 
there is still more overhead than with simple floats because mixed-type 
arithmetic is handled more generically (the same algorithm covers all 
the cases).

The speed could be improved but hasn't been because it is so easy to get 
a Python float if you are concerned about speed.

-Travis



From S.Mientki-nospam at mailbox.kun.nl  Tue Jan 23 15:23:26 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Tue, 23 Jan 2007 21:23:26 +0100
Subject: best package for a physical simulation?
In-Reply-To: <mailman.3027.1169562089.32031.python-list@python.org>
References: <mailman.9299.1169555288.32030.python-list@python.org>
	<mailman.3027.1169562089.32031.python-list@python.org>
Message-ID: <afdf6$45b66eaf$d443bb3a$8646@news.speedlinq.nl>

sittner at lkb.ens.fr wrote:
> Hello everyone,
> i would like to use python to perform some simulation involving collisions
> of colloidal particles.
> which is the best package/engine to do that in python?
> thanks,
> T
> 
Maybe this is what you're looking for ...
   http://simmodel.tigris.org/
... but I don't know if there's already something touchable ;-)

cheers,
Stef Mientki


From nmm1 at cus.cam.ac.uk  Wed Jan 10 14:29:32 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 10 Jan 2007 19:29:32 GMT
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<Xns98B269DCC12Fduncanbooth@127.0.0.1>
	<entr6s$ovo$1@news.albasani.net>
	<1168449342.414838.181050@p59g2000hsd.googlegroups.com>
	<eo38f1$6cu$1@gemini.csx.cam.ac.uk>
	<1168452879.866265.36880@i39g2000hsf.googlegroups.com>
	<eo3bgm$c98$1@gemini.csx.cam.ac.uk>
	<mailman.2544.1168455985.32031.python-list@python.org>
Message-ID: <eo3eqs$icv$1@gemini.csx.cam.ac.uk>


In article <mailman.2544.1168455985.32031.python-list at python.org>,
Sergei Organov <osv at javad.com> writes:
|> 
|> Do you mean that POSIX threads are inherently designed and implemented
|> to stay idle most of the time?! If so, I'm afraid those guys that
|> designed POSIX threads won't agree with you. In particular, as far as I
|> remember, David R. Butenhof said a few times in comp.programming.threads
|> that POSIX threads were primarily designed to meet parallel programming
|> needs on SMP, or at least that was how I understood him.

I do mean that, and I know that they don't agree.  However, the word
"designed" doesn't really make a lot of sense for POSIX threads - the
one I tend to use is "perpetrated".

The people who put the specification together were either unaware of
most of the experience of the previous 30 years, or chose to ignore it.
In particular, in this context, the importance of being able to control
the scheduling was well-known, as was the fact that it is NOT possible
to mix processes with different scheduling models on the same set of
CPUs.  POSIX's facilities are completely hopeless for that purpose, and
most of the systems I have used effectively ignore them.

I could go on at great length, and the performance aspects are not even
the worst aspect of POSIX threads.  The fact that there is no usable
memory model, and the synchronisation depends on C to handle the
low-level consistency, but there are no CONCEPTS in common between
POSIX and C's memory consistency 'specifications' is perhaps the worst.
That is why many POSIX threads programs work until the genuinely
shared memory accesses become frequent enough that you get some to the
same location in a single machine cycle.


Regards,
Nick Maclaren.


From fumanchu at amor.org  Thu Jan 25 03:02:19 2007
From: fumanchu at amor.org (fumanchu)
Date: 25 Jan 2007 00:02:19 -0800
Subject: ANN: Dejavu 1.5.0RC1
In-Reply-To: <1169703594.951755.180990@m58g2000cwm.googlegroups.com>
References: <mailman.3122.1169680178.32031.python-list@python.org>
	<1169703594.951755.180990@m58g2000cwm.googlegroups.com>
Message-ID: <1169712139.759270.165670@l53g2000cwa.googlegroups.com>

On Jan 24, 9:39 pm, "Michele Simionato" <michele.simion... at gmail.com>
wrote:
> On Jan 24, 11:57 pm, "Robert Brewer" <fuman... at amor.org> wrote:
> > The Dejavu Object-Relational Mapper (version 1.5.0RC1) is now available
> > and in the public domain. Get it at http://projects.amor.org/dejavu,
> > or from PyPI: http://www.python.org/pypi/Dejavu/1.5.0RC1.
>
> I am curious ... how this compare to SQLAlchemy?

The comparisons could be endless ;) but here are some of the larger
differences:

 1. Dejavu uses generic "storage" concepts and syntax, while SQLAlchemy
prefers database concepts and syntax.
 2. Dejavu uses Python expressions (lambdas) to query storage, whereas
SQLAlchemy uses functions and magic attributes:
    * SQLAlchemy: users.select(and_(users.c.age < 40, users.c.name !=
'Mary'))
    * Dejavu: recall(users, lambda u: u.age < 40 and u.name != 'Mary')
 3. SQLAlchemy prefers that you write data classes, table classes and
the mappers between them. Dejavu only expects you to write a data
class. New in 1.5: you can auto-generate even the data classes if you
already have a populated database.
 4. SQLAlchemy allows you to write more complicated queries (like
subqueries and aggregate columns). Dejavu doesn't provide those yet
(slated for 1.6).


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org



From scott.daniels at acm.org  Sat Jan 13 23:55:48 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sat, 13 Jan 2007 20:55:48 -0800
Subject: Tkinter code (with pmw) executing to soon please help
In-Reply-To: <mailman.2704.1168749021.32031.python-list@python.org>
References: <1168746063.322340.10410@l53g2000cwa.googlegroups.com>
	<mailman.2704.1168749021.32031.python-list@python.org>
Message-ID: <45a9ad0a$1@nntp0.pdx.net>

Gabriel Genellina wrote:
>... So `callback` should return a function, like this:
> 
> def callback(text):
>   def handler(event):
>     print text
> 

Even better than that:
     def callback(text):
         def handler(event):
             print text
         return handler

Otherwise callback returns the spectacularly un-useful value None.

--Scott David Daniels
scott.daniels at acm.org


From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 26 19:08:00 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 27 Jan 2007 11:08:00 +1100
Subject: instancemethod
References: <mailman.2961.1169417800.32031.python-list@python.org>
	<45b51298$0$8289$426a74cc@news.free.fr>
	<ef60af090701221255m575701e7jaae6bd858acbea5c@mail.gmail.com>
	<dea92f560701230608p469d5937ya658e2bb234c4941@mail.gmail.com>
	<mailman.3041.1169586704.32031.python-list@python.org>
	<45ba2b72$0$3007$426a34cc@news.free.fr>
Message-ID: <pan.2007.01.27.00.07.59.387012@REMOVE.THIS.cybersource.com.au>

On Fri, 26 Jan 2007 17:25:37 +0100, Bruno Desthuilliers wrote:

>>    def __del__(self):
>>        try:
>>            self.close()
>>        finally:
>>            pass
>>        except:
>>            pass
> 
> The finally clause is useless here.


In principle, closing a file could raise an exception. I've never seen it
happen, but it could. From the Linux man pages:

"Not checking the return value of close() is a common but nevertheless
serious programming error. It is quite possible that errors on a previous
write(2) operation are first reported at the final close(). Not checking
the return value when closing the file may lead to silent loss of data.
This can especially be observed with NFS and with disk quota."

http://www.die.net/doc/linux/man/man2/close.2.html

I assume that the same will apply in Python.

It has to be said, however, that the error recovery shown ("pass") is
fairly pointless :-)


-- 
Steven



From pretoriano_2001 at hotmail.com  Mon Jan  8 08:25:49 2007
From: pretoriano_2001 at hotmail.com (vizcayno)
Date: 8 Jan 2007 05:25:49 -0800
Subject: Recommendations (or best practices) to define functions (or
	methods)
In-Reply-To: <45A1F1D9.8070206@v.loewis.de>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
	<45A1F1D9.8070206@v.loewis.de>
Message-ID: <1168262749.852897.13010@q40g2000cwq.googlegroups.com>


Martin v. L?wis ha escrito:

> vizcayno schrieb:
> > Need your help in the "correct" definition of the next function. If
> > necessary, I would like to know about a web site or documentation that
> > tells me about best practices in defining functions, especially for
> > those that consider the error exceptions management.
>
> I agree with George Sakkis' remarks. The best way to define this function is
>
> def ExecuteSQL(cmdSQL, cursor):
>   return cursor.execute(cmdSQL)
>
> If this raises an exception, it likely means there is something
> wrong with the SQL statement. The program should abort, and the
> developer should correct it.
>
> Regards,
> Martin

Martin:
Thanks for your indications.
However, what happens when the error is due to data error. Or when the
program is reading many files to save data into a database and one or
two files have problems with data format. I would like to keep the
program running (using exception in a controlled way) for the remaining
good files and prepare a log about the failed files. How to keep the
same function for a program that runs in batch, or on-line or in  the
web? Giving the simple example I put, I would like to find more
guidelines.
Thanks.



From etatoby at gmail.com  Sun Jan 28 10:50:40 2007
From: etatoby at gmail.com (Toby)
Date: 28 Jan 2007 15:50:40 GMT
Subject: Commandline wrapper: help needed
References: <45bb7527$0$20806$5fc30a8@news.tiscali.it>
	<vonu84-b0l.ln1@ophelia.g5n.co.uk>
Message-ID: <45bcc64c$0$20817$5fc30a8@news.tiscali.it>

Toby A Inkster wrote:
> Hello Toby, excellent name you have there. 

Why, thank you!

> What advantage (if any) does this method have over standard UNIX-style
> pipes?

The advantage is being able to write my own filters and input/output
modules and have as small a granularity as needed (while standard UNIX
filters such as cat, grep, sed and awk process entire lines at a time.)
For example I can launch an interactive shell of some kind and use it
both from the terminal I opened it in, and from the network, if my
script is listening on a socket.

By the way, I am using standard UNIX pipes, that's how popen() works!


Toby


From gagsl-py at yahoo.com.ar  Sun Jan 21 03:30:47 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 21 Jan 2007 05:30:47 -0300
Subject: A solution to the MSVCRT vs MSVCR71 problem?
In-Reply-To: <1169348867.369917.104970@m58g2000cwm.googlegroups.com>
References: <1169348867.369917.104970@m58g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20070121042707.0432dda8@yahoo.com.ar>

At Sunday 21/1/2007 00:07, sturlamolden wrote:

>Solution to problem 1:
>
>Compile with your compiler or choice, never mind which CRT are used.
>Use a 'dumpbin' program, find all references to msvcrt in the binary
>DLL file. Create a dll with name "py_crt" that exports these functions
>but redirects them to msvcrt71. That is, in the file py_crt.def we put
>something like
>
>EXPORTS
>malloc=msvcr71.malloc
>free=msvcr71.free
>etc.
>
>Compile the DLL py_crt.dll and then open your pyd file in binary mode.
>Exchange all occurances of the string "msvcrt" (or any other CRT name)
>with "py_crt". Now your binary should work just fine. What you need to
>make sure is just that the name of the proxy has the same number of
>letters as the CRT your compiler linked. So if it is msvcrt81.dll, e.g.
>use something like py_crt81.dll instead of py_crt.dll.
>
>Solution to problem 2:
>[modify external references inside python25.dll to use a different runtime]

This would only work, if runtime dll's were compatibles between them, 
and they are not. You can't blindly redirect a call to msvcr71.__xyz 
to msvcr80.__xyz and expect that to work magically - it may have a 
different number of arguments, or different types, or even may not 
exist anymore.
(And what about any symbol exported by ordinal?)


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From borntonetwork at gmail.com  Sat Jan 20 10:03:12 2007
From: borntonetwork at gmail.com (borntonetwork)
Date: 20 Jan 2007 07:03:12 -0800
Subject: The proper use of QSignalMapper
References: <1169045073.138626.60770@l53g2000cwa.googlegroups.com>
	<1169049100.393777.269350@v45g2000cwv.googlegroups.com>
	<1169085859.586698.149400@51g2000cwl.googlegroups.com>
	<1169135947.039984.108930@51g2000cwl.googlegroups.com>
Message-ID: <1169305392.100624.295850@11g2000cwr.googlegroups.com>

David, thanks for your help. Unfortunately, all attempts of making this
solution work have failed. I would be interested to know if anyone has
used QSignalMapper successfully in a similar situation. For any
interested, I worked around the problem using a closure, which seems a
bit cleaner from a coding point of view, although I don't have any idea
if it is more efficient or not:

    def makeHandler(self, idx):
        def handler(state):
            print 'The state is:', str(state), 'for checkbox object',
                    str(idx)
        return handler

Each iteration then created a new function based on the closure:

        self.handlers = []
        for idx in range(1, maxIngredients+1):
            wName = 'chkProductIngredientsDelete_'+str(idx)
            w = self.__dict__[wName]
            self.handlers.append(self.makeHandler(idx - 1))
            self.window.connect(w, QtCore.SIGNAL("stateChanged(int)"),
                    self.handlers[idx - 1])

So now the output when each checkbox is clicked is something like this:

The state is: 2 for checkbox object 0
The state is: 2 for checkbox object 1
...



David Boddie wrote:
> borntonetwork wrote:
> > Thanks, David, for you help.
> >
> > When I change the slot function to what you show in your second
> > example, I get the same results: nothing.
>
> This may be due to something I missed in your code. When you
> connect the signal from the signal mapper to your class, you
> need to specify the signal as a C++ signature as well:
>
>         self.connect(self.signalMapper, QtCore.SIGNAL(
>              "mapped(int)"),
>              self.deleteProductIngredient)
>
> The second example should now work.
>
> Looking at the first example, which uses SLOT() rather than specifying
> a Python method, the following might be due to the way you call
> connect, though it is surprising:
>
> > When I change it to what you
> > have in your first example, I get the following:
> >
> > Object::connect: No such slot QApplication::map()
> > Object::connect:  (sender name:   'chkProductIngredientsDelete_1')
> > Object::connect:  (receiver name: 'main.py')
>
> [...]
>
> It looks like you should try something like this:
>
>              self.connect(w, QtCore.SIGNAL("stateChanged(int)"),
>                   self.signalMapper,
>                   QtCore.SLOT("map()"))
>
> I can't understand why calling self.app.connect() would cause the
> connection to be attempted between self.signalMapper and self.app.
>
> Maybe someone on the PyQt/PyKDE mailing list would be able to
> explain the behaviour you're seeing:
> 
>   http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
> 
> David



From antonyliu2002 at yahoo.com  Fri Jan  5 01:55:59 2007
From: antonyliu2002 at yahoo.com (antonyliu2002 at yahoo.com)
Date: 4 Jan 2007 22:55:59 -0800
Subject: Undefined symbol __pure_virtual when importing MySQLdb
References: <1167977378.425615.220350@51g2000cwl.googlegroups.com>
	<mailman.2313.1167978999.32031.python-list@python.org>
Message-ID: <1167980159.711978.309970@i15g2000cwa.googlegroups.com>

Fredrik Lundh wrote:
> antonyliu2002 at yahoo.com wrote:
>
> > I have googled hard, and did see someone asking the same question, but
> > haven't found a good solution to this problem.  Could anyone give me a
> > hint?  Thanks a lot!
>
> googling for "undefined symbol: __pure_virtual" brings up hundreds of
> posts on this topic, and the answer is *always* to make sure that you're
> linking with a version of the C++ libraries that matches your compiler.
>
> </F>

Hi, thanks.  I followed the strategy provided at the following url

http://www.mail-archive.com/dbi-users at perl.org/msg27851.html

by adding "-lmygcc" to the end of the librarys to link. I added it to
the end of this line in the mysql_config script like so:

   libs=" $ldflags -L$pkglibdir -lmysqlclient -lz -lcrypt -lnsl -lm
-lmygcc "

And then I recompiled the MySQL-python-1.2.1 package, but the same
problem remains.



From gagsl-py at yahoo.com.ar  Wed Jan 10 05:45:57 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 10 Jan 2007 07:45:57 -0300
Subject: Is there a way to protect a piece of critical code?
In-Reply-To: <000b01c734a0$2f635840$03000080@hendrik>
References: <000b01c734a0$2f635840$03000080@hendrik>
Message-ID: <7.0.1.0.0.20070110074006.03fea900@yahoo.com.ar>

At Wednesday 10/1/2007 07:14, Hendrik van Rooyen wrote:

>I would like to do the following as one atomic operation:
>
>1) Append an item to a list
>2) Set a Boolean indicator

Wouldn't a thread.Lock object serve your purposes?


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From wolf_tracks at invalid.com  Sat Jan  6 23:33:13 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sat, 06 Jan 2007 20:33:13 -0800
Subject: Just Getting Started with Python on MS XP Pro
In-Reply-To: <mailman.2367.1168100759.32031.python-list@python.org>
References: <djvnh.11482$ZT3.4851@newssvr19.news.prodigy.com>	<mailman.2332.1168016502.32031.python-list@python.org>	<GAInh.32097$Gr2.21336@newssvr21.news.prodigy.net>	<BDInh.32100$Gr2.31964@newssvr21.news.prodigy.net>	<yNPnh.9155$x67.8570@newssvr17.news.prodigy.net>
	<mailman.2367.1168100759.32031.python-list@python.org>
Message-ID: <fK_nh.25689$QU1.17301@newssvr22.news.prodigy.net>

Thomas Ploch wrote:
> W. Watson schrieb:
>> The wiki site lead to a link to download pythonwin, but the download is 
>> broken. Googling invariably leads back to that link. I found 
>> <http://www.python.org/download/releases/binaries-1.4/pythonwin/>, which has 
>> two files listed: oadist.exe and win32dbg.exe. Do I need both or is just the 
>> latter one?
> 
> 
> A google query 'pythonwin' directly brings me here:
> 
> https://sourceforge.net/projects/pywin32/
> 
> I think this is the place to go
> 
> Thomas
> 
> 
That gets me the python program (pywin), which I got from a URL in a post 
above (python-win.msi). I guess these are the same or at least just the 
interpreter, and do not provide the IDE-debugger. I can't get pythonwin, the 
debugger and IDE. The link was broken last night when I tried it. Well, let 
me try now. Nope, it still reports "Error 404: File Not Found"




          Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
              (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
               Obz Site:  39? 15' 7" N, 121? 2' 32" W, 2700 feet

              ""I do not fear death. I had been dead for billions
                and billions of years before I was born, and had
                not suffered the slightest inconvenience from it."
                    -- Mark Twain (a nod to evolution)
-- 
                     Web Page: <home.earthlink.net/~mtnviews>


From parallelpython at gmail.com  Thu Jan 11 18:41:16 2007
From: parallelpython at gmail.com (parallelpython at gmail.com)
Date: 11 Jan 2007 15:41:16 -0800
Subject: Parallel Python
References: <1168127555.183795.183730@v33g2000cwv.googlegroups.com>
	<mailman.2408.1168248992.32031.python-list@python.org>
	<1168417065.105920.319970@o58g2000hsb.googlegroups.com>
	<1168449762.738411.128240@i56g2000hsf.googlegroups.com>
Message-ID: <1168558876.033624.178010@k58g2000hse.googlegroups.com>

sturlamolden wrote:
> parallelpyt... at gmail.com wrote:
>
> >    That's right. ppsmp starts multiple interpreters in separate
> > processes and organize communication between them through IPC.
>
> Thus you are basically reinventing MPI.
>
> http://mpi4py.scipy.org/
> http://en.wikipedia.org/wiki/Message_Passing_Interface

Thanks for bringing that into consideration.

I am well aware of MPI and have written several programs in C/C++ and
Fortran which use it.
I would agree that MPI is the most common solution to run software on a
cluster (computers connected by network). Although there is another
parallelization approach: PVM (Parallel Virtual Machine)
http://www.csm.ornl.gov/pvm/pvm_home.html. I would say ppsmp is more
similar to the later.

By the way there are links to different python parallelization
techniques (including MPI) from PP site:
http://www.parallelpython.com/component/option,com_weblinks/catid,14/Itemid,23/

The main difference between MPI python solutions and ppsmp is that with
MPI you have to organize both computations
{MPI_Comm_rank(MPI_COMM_WORLD, &id); if id==1 then ... else ....} and
data distribution (MPI_Send / MPI_Recv) by yourself. While with ppsmp
you just submit a function with arguments to the execution server and
retrieve the results later.
That makes transition from serial python software to parallel much
simpler with ppsmp than with MPI.

To make this point clearer here is a short example:
--------------------serial code 2 lines------------------
for input in inputs:
    print "Sum of primes below", input, "is", sum_primes(input)
--------------------parallel code 3 lines----------------
jobs = [(input, job_server.submit(sum_primes,(input,), (isprime,),
("math",))) for input in inputs]
for input, job in jobs:
    print "Sum of primes below", input, "is", job()
---------------------------------------------------------------
In this example parallel execution was added at the cost of 1 line of
code!

The other difference with MPI is that ppsmp dynamically decides where
to run each given job. For example if there are other active processes
running in the system ppsmp will use in the bigger extent the
processors which are free. Since in MPI the whole tasks is usually
divided  between processors equally at the beginning, the overall
runtime will be determined by the slowest running process (the one
which shares processor with another running program). In this
particular case ppsmp will outperform MPI.

The third, probably less important, difference is that with MPI based
parallel python code you must have MPI installed in the system.

Overall ppsmp is still work in progress and there are other interesting
features which I would like to implement. This is the main reason why I
do not open the source of ppsmp - to have better control of its future
development, as advised here: http://en.wikipedia.org/wiki/Freeware :-)

Best regards,
Vitalii



From http  Wed Jan 17 18:11:09 2007
From: http (Paul Rubin)
Date: 17 Jan 2007 15:11:09 -0800
Subject: How can I create a linked list in Python?
References: <eoj6rr$90bt$1@netnews.upenn.edu>
	<mailman.2791.1168975031.32031.python-list@python.org>
	<eojb9v$92rq$1@netnews.upenn.edu>
	<45ad5104$0$393$426a74cc@news.free.fr>
	<1169009882.408482.43360@q2g2000cwa.googlegroups.com>
	<45ae8950$0$31033$426a74cc@news.free.fr>
	<1169074382.702857.313010@11g2000cwr.googlegroups.com>
Message-ID: <7xps9dl04y.fsf@ruckus.brouhaha.com>

"sturlamolden" <sturlamolden at yahoo.no> writes:
> Actually, nesting tuples or lists doesn't really duplicate Lisp cons,
> as one can only create a stack-like object with the nesting. Python
> really need a cons type like Lisp. I think it is time to write one, in
> a plain C extension.

But that's what Lisp does too.  As the poet said:

    One thing the average language lacks
    Is programmed use of push-down stacks.
    But LISP provides this feature free:
    A stack - you guessed it - is a tree.
    An empty stack is simply NIL.
    In order, then, the stack to fill
    A CONS will push things on the top;
    To empty it, a CDR will
    Behave exactly like a pop.
    A simple CAR will get you back
    The last thing you pushed on the stack;
    An empty stack's detectable
    By testing with the function NULL.
    Thus even should a LISPer lose
    With PROGs and GOs, RETURNs and DOs,
    He need his mind not overtax
    To implement recursive hacks:
    He'll utilize this clever ruse
    Of using trees as moby stacks.

            (http://www.gotlisp.com/lambda/lambda.txt)

All Python needs is a way of displaying the lists as (a b c) instead
of [a, [b, [c, None]]], and that can be done in pure Python.


From nmm1 at cus.cam.ac.uk  Sat Jan 20 08:19:29 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 20 Jan 2007 13:19:29 GMT
Subject: OT Annoying Habits (Was: when format strings attack)
References: <mailman.2923.1169256506.32031.python-list@python.org>
Message-ID: <eot4t1$b5g$1@gemini.csx.cam.ac.uk>


In article <mailman.2923.1169256506.32031.python-list at python.org>,
"Carroll, Barry" <Barry.Carroll at psc.com> writes:
|> 
|> My thanks to Aahz and the others who responded.  I also did some
|> Googling on my own.  I found out that top-posting is the norm in the
|> e-mail world.  Bottom- and inline-posting are the norm in the newsgroup
|> world. =20

Sorry, even that is not so.  I have been using Email since the 1960s,
and top-posting has been used only by the inconsiderate.

Note that, when you include a complete document in a message (whether
Email or anything else), then you should put it at the bottom.  Rather
like an appendix.  But top-posting when you are responding to Email
is as discourteous as top-posting when you are responding to newsgroups.

|> So I concede the point, and I'm bottom-posting like a good citizen. =20

Excellent!


Regards,
Nick Maclaren.


From gagsl-py at yahoo.com.ar  Wed Jan 10 04:57:32 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 10 Jan 2007 06:57:32 -0300
Subject: maximum number of threads
In-Reply-To: <45a497ec$0$331$e4fe514c@news.xs4all.nl>
References: <45a497ec$0$331$e4fe514c@news.xs4all.nl>
Message-ID: <7.0.1.0.0.20070110064655.0508d0a0@yahoo.com.ar>

At Wednesday 10/1/2007 04:38, Paul Sijben wrote:

>I have a server in Python 2.5 that generates a lot of threads. It is
>running on a linux server (Fedora Core 6).
>The server quickly runs out of threads.
>
>   File "/usr/local/lib/python2.5/threading.py", line 434, in start
>     _start_new_thread(self.__bootstrap, ())
>error: can't start new thread
>
>Does anyone know what it going on here and how I can ensure that I have
>all the threads I need?

Simply you can't, as you can't have 10000 open files at once. 
Computer resources are not infinite.
Do you really need so many threads? Above a certain threshold, the 
program total execution time may increase very quickly.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From arkanes at gmail.com  Wed Jan 24 12:30:54 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 24 Jan 2007 11:30:54 -0600
Subject: Python does not play well with others
In-Reply-To: <suMth.75341$wP1.17392@newssvr14.news.prodigy.net>
References: <NXyth.51860$wc5.6792@newssvr25.news.prodigy.net>
	<xqxirex3psq.fsf@cola3.ca.boeing.com>
	<suMth.75341$wP1.17392@newssvr14.news.prodigy.net>
Message-ID: <4866bea60701240930w6d048973n590ffba0c4a1f13d@mail.gmail.com>

On 1/24/07, John Nagle <nagle at animats.com> wrote:
> Harry George wrote:
> > John Nagle <nagle at animats.com> writes:
>
> > You experience isn't shared by everyone.  Some of us find Python the
> > most functional and portable of the candidates you mention.
>
>     The language is fine.  It's the bindings to other packages that
> are the problem.  There are three different packages for talking
> to OpenSSL, and they're all broken in some important way.
>
>     What's actually needed on the SSL side, I think, is to
> add bindings to the built-in SSL to export the functionality
> the M2Crypto C binding module has.  Preferably with better
> attention to reference count problems, and without using SWIG.
> Then move over the Python portions of M2Crypto.
>
>     Some problems, all of which are known and logged bugs:
>
>     - The built in SSL package doesn't actually validate anything,
>         and will happily accept bogus SSL certificates.
>     - The built in SSL package doesn't allow access to most of the
>         fields of an SSL certificate, and the ones you can get
>         are returned in a debug format that's not parseable.
>     - M2Crypto has OpenSSL and SWIG version dependencies beyond
>         what is documented.  The latest version of SWIG has
>         a problem which breaks builds with older versions of
>         OpenSSL.
>     - M2Crypto may still have a memory leak associated with contexts.
>         (Check out "close" in "Context".)
>     - M2Crypto doesn't understand SSL certificates which support
>         a list of sites.
>     - M2Crypto and the socket library don't play nice about timeouts.
>
> Most of these problems have been known for years.  The last person to
> try to fix this was treated so badly he stopped contributing.  Read
> the bug history for "[1114345] Add SSL certificate validation".
> It's sad.
>

Just to be clear: The problem here is "my personal itch is not being
scratched by other people for me", not "Python doesn't play well with
others". You are not any more important than anyone else and assuming
that anyone cares about your problems is a major fallacy. You have a
specific library that doesn't meet your needs, and that you are not
interested in maintaining yourself, so you are attempting to leverage
some sort of community guilt trip to get other people to do it for
you. That's dishonest and off-putting.

Not everyone has the ability or desire to contribute. That is fine.
They might even ask if anyone is interested in doing it for them,
which is also fine - there are many people who enjoy working on
something that is of use to others, even if it's not important to them
personally. But stop acting like you're entitled to special
consideration, or that the "Python community" is failing some sort of
duty by not catering to you specifically.


From morpheus at spamhater.too  Thu Jan 25 11:03:02 2007
From: morpheus at spamhater.too (Morpheus)
Date: Thu, 25 Jan 2007 17:03:02 +0100
Subject: wxPython: panel not fully painted
References: <1169674550.837006.304370@q2g2000cwa.googlegroups.com>
Message-ID: <pan.2007.01.25.16.02.59.218097@spamhater.too>

On Wed, 24 Jan 2007 13:35:51 -0800, citronelu wrote:

> Hi,
> 
> I'm new to wxpython, and the following code is my first serious
> attempt:
> 
> 
> #~ start code
> import wx
> 
> class MyPanel(wx.Panel):
>     def __init__(self, parent, id):
>         wx.Panel.__init__(self, parent, id)
>         self.parent = parent
>         button = wx.Button(self, -1, "Refresh")
>         button.SetPosition((100, 100))
>         button.SetFocus()
> 
>         self.Bind(wx.EVT_BUTTON, self.OnCloseMe, button)
> 
>     def OnCloseMe(self, event):
>         self.parent.f_redraw(self)
>         pass
> 
> 
> class MyFrame(wx.Frame):
>     def __init__(
>             self, parent, ID, title, pos=wx.DefaultPosition,
>             size=wx.DefaultSize, style=wx.DEFAULT_FRAME_STYLE
>             ):
> 
>         wx.Frame.__init__(self, parent, ID, title, pos, size, style)
> 
>     def f_redraw(self, kill_window):
>         kill_window.Destroy()
>         MyPanel(self, -1)
>         #~ self.SendSizeEvent()
> 
> 
> wxApp = wx.App()
> f = MyFrame(None, -1, "App Title")
> MyPanel(f, -1)
> f.Show()
> wxApp.MainLoop()
> 
> 
> #~ end code
> 
> 
> My problem is: when I press the "refresh" button, the new panel is
> painted only as a 20x20 pixels square on the top right side of the
> frame. If I resize the frame, the panel is repainted correctly (that's
> why I inserted the self.SendSizeEvent() line - commented above).
> 
> Is there something I'm missing, or this is normal ?
> 
> I'm using python 2.4.3 and wxpython 2.8.1.1 unicode, on WinXP SP2.
> Windows extensions are also installed.

Consider using sizers, you'll need them anyway. They do such things for
you, and many other things too.

The help file has a good chapter on this: Working with sizers.

Kind regards
Morpheus




From Eugene.Antimirov at portaone.com  Tue Jan 23 07:21:09 2007
From: Eugene.Antimirov at portaone.com (Eugene Antimirov)
Date: Tue, 23 Jan 2007 14:21:09 +0200
Subject: Working with shared folders
In-Reply-To: <1169549029.039191.87240@s48g2000cws.googlegroups.com>
References: <1169549029.039191.87240@s48g2000cws.googlegroups.com>
Message-ID: <45B5FDB5.8050206@portaone.com>

Marcpp wrote:
> Any idea to work with windows shared folders?
> Which library is needed to execute console comands?
>   
Don't you want to look at fusesmb first and then work with windows files 
and dirs as well as with any others.

-- 
Sincerely,
Eugene Antimirov
PortaOne, Inc., SIP Support Engineer
support at portaone.com

* For further Billing and Technical information:
=> Please visit our website http://www.portaone.com
=> Please visit our forum http://forum.portaone.com

* Meet us at Internet Telephony Conference & Expo
* Ft. Lauderdale, FL - January 24-26, 2007 - Booth 1322
* http://www.tmcnet.com/voip/conference/



From richie at entrian.com  Mon Jan 22 03:53:38 2007
From: richie at entrian.com (Richie Hindle)
Date: 22 Jan 2007 00:53:38 -0800
Subject: PyMeld for html templates?
References: <mailman.2858.1169084154.32031.python-list@python.org>
	<1169241497.610167.130580@a75g2000cwd.googlegroups.com>
	<mailman.2976.1169434079.32031.python-list@python.org>
Message-ID: <1169456018.120120.324230@q2g2000cwa.googlegroups.com>

[Sean]
> The pymeld docs show examples only for the Python command line
> interpreter and show using the print statement to output stuff. But
> using mod_python.apache, I think you need to use req.write(something)
> format. And of course, this fails when you feed it output from Meld.

req.write(str(meld)) ?

-- 
Richie Hindle
richie at entrian.com



From stj911 at rock.com  Tue Jan 30 18:47:44 2007
From: stj911 at rock.com (stj911 at rock.com)
Date: 30 Jan 2007 15:47:44 -0800
Subject: BYU Physics Prof Finds Thermate in WTC Physical Samples,
	Building Collapses an Inside Job
Message-ID: <1170200864.492655.11850@s48g2000cws.googlegroups.com>

http://portland.indymedia.org/en/2006/06/341238.shtml

BYU Physics Prof Finds Thermate in WTC Physical Samples, Building 
Collapses an Inside Job
author: Jacob Hamblin
Based on chemical analysis of WTC structural steel residue, a Brigham 
Young University physics professor has identified the material as 
Thermate. Thermate is the controlled demolition explosive thermite 
plus sulfur. Sulfur cases the thermite to burn hotter, cutting steel 
quickly and leaving trails of yellow colored residue.

[ photo: wtc steel with diagonal cut, thermate residue ]

Prof. Steven Jones, who conducted his PhD research at the Stanford 
Linear Accelerator Center and post-doctoral research at Cornell 
University and the Los Alamos Meson Physics Facility, has analyised 
materials from WTC and has detected the existence of thermate, used 
for "cutting" the steel support columns, as evident in the photo 
below.

Dr. Jones is a co-founder of Scholars for 911 Truth.

Dr. Jones in earlier work pointed to thermate as the likely explosive 
that brought down the WTC1, WTC2, and WTC7 skyscrapers. But only 
recently was physical material analysed in the lab and the presense of 
thermate announced. The samples were provided Dr. Jones team from 
redundant sourses.

Both BYU and Prof. Jones have been offered additional grants if he 
would "change the direction" of his research. In addition, there have 
been threats made by an individual who "is taking action" to stop 
Steven Jones' research, specifically his experiment with thermites 
(aluminothermics), on the grounds his work may be helpful to 
"terrorists". Jones notes that much more detailed information on both 
thermite and thermate is readily available on the internet.

add a comment on this article
summary of 10 recent thermite/thermate posts 	17.Jun.2006 15:59
foward me to someone 	link

[COMMENTARY: in time order of article theme on thermite at WTCs, 
videos, discussion, pictures; [1] since thermite/thermate can be made 
of basic industrical chemicals, it can be made "tracerless"--i.e., 
avoid all signature tracer chemicals that the U.S. Govt requires be 
mixed in very small amounts in all highly powerful and highly 
monitored explosives to keep track of every batch's origin. [2] 
Moreover if he has found it in WTC7, as he says, then with Silverstein 
admitting that he conducted a controlled demolition on 9-11 of WTC7 
around 5:30 p.m., then Silverstein is admitting that WTC1, WTC2, and 
WTC7 all are thermate controlled demolitions. [3] And who was in 
charge of WTC security? Why, Marvin Bush, brother of George W. Bush, 
on the board of Securatech. [4] And written up in their mom's 
(ghostwritten) autobiography, Barbara Bush drops the other bombshell 
that it's just a coincidence that Marvin's contract at the WTCs was up 
on September 11, 2001 anyway. She wrote about it in the book! [5] The 
Bush family through Marvin Bush have been in charge of security of the 
WTCs since immediately after the first failed terrorist attempt to 
knock down the WTCs one month into Clinton's Presidential tenure in 
1993. [6] The FBI is on record giving the order to conduct terrorism 
on the WTC in 1993, via their hired gun Salam, who didn't want to 
carry out the attack 'for real' since he was told by the FBI that he 
was hired simply for a sting opreation to arrest some perpetrators in 
a terror cell he infiltrated for the FBI. [two minute video summary on 
this:  http://video.google.com/videoplay?docid=6752092058844526234 [7] 
When the FBI instead told him to both suggest the WTC as a target for 
the 1993 attack, as well as teach them how to make bombs, as well as 
FBI allowing him to provide live explosives--their agent started 
taping everything covertly that he was ordered to do in reference to 
FBI ordering him to carry out the 1993 terrorist attack on the WTCs. 
[8] Immediately after the failed attack on the WTCs, the Bush family, 
through a corporate shell vehicle owned in part by the royal family of 
Kuwait, the Kuwaiti/American Corporation, was put in charge of 
security at the WTCs, with Marvin Bush on board. [9] Seven weeks 
before the controlled demolitions of 9-11, the towers change hands in 
their first (rushed) sale, being all bought up by Silverstein, who 
introduces a huge terrorism insurance appendage. [10] Despite 
admitting publicly that HE gave the order (in the PBS special "America 
Rebuilds") to blow up his own WTC7 on 9-11, the whole thing is so 
corrupt that he still collects 500 million dollars on the "terrorist 
destuction alibi" of WTC7, and has already collected several billion 
dollars on the 'terrorism clause' in the WTC1/2 insurance. [11] and We 
already know that the anthrax that was sent to congress and which 
killed several postal workers in the process (sent to Senator Daschle 
and to Senator Leahy), was weaponized under a covert CIA only 
contract, and it was a domestic Ames strain of anthrax coming from one 
of three or four of the U.S. bioweapons labs.[12] The "Patriot Act" 
was already written up before 9-11, just required a whiff of domestic 
anthrax to force passage with a bit more bio-terrorism on the Congress 
itself by domestic terrorists; [13] Bush and his whole Cabinet of 
course were out of danger: they were taking an anthrax exclusive drug 
to counter it, from September 11 onward, so when the anthrax hit in 
early October in DC, Bush's staff would be immune to the domestic-in-
origin anthrax terrorism. The interesting point of course is Bush's 
whole team all psyched up and anticipating an anthrax attack one month 
in advance--which just so happens to be the incubation time for the 
anthax bacilli--I could go on ad nauseum. The whole U.S. government is 
a terrorist unit, operating under the guise of its counter terrorism 
squads.]




summary:
---------------------------------------------

Dr. Jones is a co-founder of Scholars for 911 Truth.

"If Dr. Jones's work ever breaks into the mainstream media, and the 
rest of the country reacts the way the Utah County audience reacted, 
traditional political divisions will evaporate like steel beams 
exploded with thermite, and the whole lot of them, the Democrats and 
the Republicans, will be swept away, along with the military-
industrial complex that has apparently managed to subvert the 
constitution of these United States and to con the American public, 
mesmerized by the shock of 9/11 and hypnotized by spell-binding 
incantations of freedom and patriotism, into going along with their 
mad plans for world domination."

BYU Physics Prof Finds Thermate in WTC Physical Samples, Building 
Collapses an Inside Job.....Based on chemical analysis of WTC 
structural steel residue, a Brigham Young University physics professor 
has identified the material as Thermate. Thermate is the controlled 
demolition explosive thermite plus sulfur. Sulfur cases the thermite 
to burn hotter, cutting steel quickly and leaving trails of yellow 
colored residue.

[see video comparisons of thermite/ate here and compare to WTC photos 
and live video below--both video links available from here:
 http://portland.indymedia.org/en/2006/04/338202.shtml ]

Dr. Jones in earlier work pointed to thermate as the likely explosive 
that brought down the WTC1, WTC2, and WTC7 skyscrapers. But only 
recently was physical material analysed in the lab and the presense of 
thermate announced. The samples were provided Dr. Jones team from 
redundant sourses.

INTERESTING HIGHER UP BRIBE AND THREAT COMING IN TO PLAY: ***"Both BYU 
and Prof. Jones have been offered additional grants if he would 
"change the direction" of his research. In addition, there have been 
threats made by an individual who "is taking action" to stop Steven 
Jones' research,*** specifically his experiment with thermites 
(aluminothermics), on the grounds his work may be helpful to 
"terrorists". Jones notes that much more detailed information on both 
thermite and thermate is readily available on the internet."



From python.leojay at gmail.com  Tue Jan 16 22:34:00 2007
From: python.leojay at gmail.com (Leo Jay)
Date: Wed, 17 Jan 2007 11:34:00 +0800
Subject: How can I write code using FP
In-Reply-To: <1169003899.592015.300290@s34g2000cwa.googlegroups.com>
References: <1169003899.592015.300290@s34g2000cwa.googlegroups.com>
Message-ID: <4e307e0f0701161934i5c143878g7f2825886cf323d4@mail.gmail.com>

On 16 Jan 2007 19:18:19 -0800, kernel1983 <kernel1983 at gmail.com> wrote:
>
> In Function Program?Language can use like this:
>
> define a function:
> f = lambda x,y:x,y
>
> then we use f to define another function:
> f2 = f(1)
> the f2 should equal to:
> f2=lambda y:1,y
>
> we should be able call f2 with one parameter:f2(2)
> just return 1,2
>
> but how can I implement the characteristic in Python??I think it could
> do like this but HOW-TO?
>
> thanks~~~
> I'm a English beginner!
> I wish somebody understand my meaning
>
>

try this:
foo = lambda x, y: (x, y)
foo1 = lambda x: foo(x,1)
foo2 = lambda y: foo(1,y)
print foo1(3)
print foo2(3)



-- 
Best Regards,
Leo Jay
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070117/f12df318/attachment.html>

From steven.bethard at gmail.com  Fri Jan  5 13:21:46 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 05 Jan 2007 11:21:46 -0700
Subject: When argparse will be in the python standard installation
In-Reply-To: <459e18db$0$17143$9b622d9e@news.freenet.de>
References: <1167840708.209024.53810@k21g2000cwa.googlegroups.com>
	<459C008D.5040404@v.loewis.de>
	<H-ydneqpW-axgAHYnZ2dnUVZ_qWvnZ2d@comcast.com>
	<459CBAC8.9060007@v.loewis.de>
	<64mdnTE_-5Ff3gDYnZ2dnUVZ_q6vnZ2d@comcast.com>
	<459e18db$0$17143$9b622d9e@news.freenet.de>
Message-ID: <459E973A.3010102@gmail.com>

[Thanks for looking through all these Martin!]

Martin v. L?wis wrote:
> Steven Bethard schrieb:
>> * alias ArgumentParser to OptionParser
>> * alias add_argument to add_option
>> * alias Values to Namespace
>> * alias OptionError and OptionValueError to ArgumentError
>> * alias add_help= keyword argument of ArgumentParser to add_help_option=
>> * alias namespace= keyword argument of parse_args to options=
> 
> Not sure what you mean by "alias": I don't think the argparse names
> should be retained (unless you feel they describe things better).

They do describe things a bit better. Given a command line like::

     prog --opt1 o --opt2 pos1 pos2 pos3

optparse can only parse out the optional command line arguments, 
``--opt1 o --opt2``, hence it uses names like ``add_option``. On the 
other hand, argparse can parse the entire command line (including the 
positional arguments ``pos1 pos2 pos3``) so it uses ``add_argument`` 
instead of ``add_option``.

>> * ArgumentParser.parse_args returns a single namespace object, not an
>>   (options, args) tuple, since argparse handles positional arguments.
>>   This could probably be addressed by adding an __iter__ method to the
>>   Namespace object which would return (self, [])
> 
> I find that I'm not that familiar with command line arguments :-)
> 
> To understand that difference, I would have to see examples of both,
> and why it is better to return a single result.

A brief example to illustrate the differences. Here is a program that 
reads the command-line args and writes the sum to a log file specified 
by --log.  With optparse, this would look something like::

     parser = optparse.OptionParser()
     parser.add_option('--log')
     options, args = parser.parse_args()
     if options.log is not None:
         logfile = open(options.log)
     else:
         logfile = sys.stdout
     try:
         integers = [int(arg) for arg in args]
     except ValueError:
         parser.error('positional arguments must be integers')
     logfile.write('%s\n' % sum(integers))
     logfile.close()

Since argparse handles positional arguments as well as optional 
arguments (and since it accepts type='outfile') the argparse version is 
much more concise::

     parser = argparse.ArgumentParser()
     parser.add_argument('integers', type=int, nargs='+')
     parser.add_argument('--log', type='outfile', default=sys.stdout)
     args = parser.parse_args()
     args.log.write('%s\n' % sum(args.integers))
     args.log.close()

So basically, since argparse parses the entire command line (instead of 
just the optional parts) there is no concept of "remaining command line 
arguments" -- *all* command line arguments have become attributes of the 
namespace returned by parse_args(). Thus, while optparse has to return 
both a namespace and the unparsed portion of the command line, argparse 
only has to return the namespace.

>> * argparse makes the default value for a "store_true" action False, and
>>   the default value for a "store_false" action True. This is what users
>>   expect, but different from optparse where the default is always None.
> 
> Could we deprecate "store_false" with no default?

That's probably reasonable.  In Python 3.0, the default could then 
become the appropriate one.

> It may be that users expect to see True and False, but how can you find
> out whether the option was given or not afterwards?

For both optparse and argparse, with "store_false", you know the option 
was not given if the stored value is something other than ``False``, and 
with "store_true", you know the option was not given if the stored value 
is something other than ``True``.

With optparse, that "something other" is always ``None`` which is 
unfortunate because it makes the following code fail::

     parser = optparse.OptionParser()
     parser.add_option('--not-foo', action='store_false')
     options, args = parser.parse_args()
     if options.not_foo:
         # do something

The ``do something`` block will execute every time because 
``options.not_foo`` is either ``False`` or ``None``, both of which 
indicate that the if-statement should not be executed.

In argparse, the code above works fine because the default is ``True`` 
instead of ``None``.

> Alternatively, could the actions become keyword arguments (with the
> action argument only preserved for backwards compatibility)? E.g.
> 
> parser.add_option("-v", store_true_into="verbose")
> parser.add_option("-q", store_false_into="verbose")
> (same for store, append, count, callback)

It looks like you're trying to merge the ``dest=`` and ``action=`` 
functionality, but I'm not sure I understand where this is going...

>> * the choices argument is now checked *after* arguments have been
>>   type-converted. This is intentional, so that you can specify, say
>>   xrange(100) instead of ["0", "1", "2", "3", ... "99"]. There is also
>>   no "choices" type anymore since any action can also specify their
>>   choices.
> 
> As an incompatible change, this could be warned-about if the type is not
> string, yet the first choice is.
> 
> Alternatively, we could require users that pass converted values to
> specify converted_choices=True in 2.6, and warn all users that don't
> pass a converted_choices flag, and then flip the default in 2.7 and 3.0.
> Then current users had a quick fix to silence the warning, and new
> users could drop the extra flag in the future.

That seems reasonable.

>>   I could probably add callback actions by creating an appropriate
>>   Action subclass and registering it. However, any code relying on
>>   parser.{largs,rargs,values} would break because the parsing algorithm
>>   is completely different in argparse.
> 
> If you can find a way to make callbacks work in the "common case",
> this flag could be deprecated and removed.

Sounds good.

>> I guess I don't know how to proceed from here. I'm reluctant to start
>> adding the code necessary to support even the easily solved issues when
>> the issues that I don't know how to solve seem like they could be deal
>> breakers.
> 
> This asks for a PEP. The views above are mine only, others may feel
> differently.

Ok.  I'll try to write a PEP up this week.

Thanks again for all your useful feedback!

STeVe


From george.sakkis at gmail.com  Tue Jan  2 17:30:53 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 2 Jan 2007 14:30:53 -0800
Subject: array of class
References: <mailman.2221.1167763760.32031.python-list@python.org>
	<459ad4f7$0$293$426a34cc@news.free.fr>
Message-ID: <1167777053.152492.3460@v33g2000cwv.googlegroups.com>

Bruno Desthuilliers wrote:

> FWIW, I guess that what you want here may looks like this:
>
> class Word(object):
>    def __init__(self, word=''):
>      self._word = word
>    def __repr__(self):
>      return "<Word %s at %d>" % (self._word, id(self))
>
>
> words = []
> for w in ['this', 'is', 'probably', 'what', 'you', 'want']:
>    words.append(Word(w))
> print words

Or more compactly:

words = [Word(w) for w in 'this is probably what you want'.split()]
print words

George



From rschroev_nospam_ml at fastmail.fm  Sat Jan 20 11:25:03 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 20 Jan 2007 16:25:03 GMT
Subject: **argv can't work
In-Reply-To: <pan.2007.01.20.03.35.54.650735@REMOVE.THIS.cybersource.com.au>
References: <mailman.2928.1169263231.32031.python-list@python.org>
	<pan.2007.01.20.03.35.54.650735@REMOVE.THIS.cybersource.com.au>
Message-ID: <znrsh.300699$Dp2.6061152@phobos.telenet-ops.be>

Steven D'Aprano schreef:
> Its because of an evil terrorist plot. I suggest you invade Belgium, that
> should fix it.

Please notify me in time so I can emigrate before it's too late.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From adonis at REMOVETHISearthlink.net  Sun Jan 28 22:44:09 2007
From: adonis at REMOVETHISearthlink.net (Adonis Vargas)
Date: Mon, 29 Jan 2007 03:44:09 GMT
Subject: Convert from unicode chars to HTML entities
In-Reply-To: <pan.2007.01.29.03.05.23.166735@REMOVEME.cybersource.com.au>
References: <pan.2007.01.29.03.05.23.166735@REMOVEME.cybersource.com.au>
Message-ID: <d4evh.16383$yx6.12566@newsread2.news.pas.earthlink.net>

Steven D'Aprano wrote:
> I have a string containing Latin-1 characters:
> 
> s = u"? and many more..."
> 
> I want to convert it to HTML entities:
> 
> result =>
> "&copy; and many more..."
> 
> Decimal/hex escapes would be acceptable:
> "&#169; and many more..."
> "&#xA9; and many more..."
> 
> I can look up tables of HTML entities on the web (they're a dime a
> dozen), turn them into a dict mapping character to entity, then convert
> the string by hand. Is there a "batteries included" solution that doesn't
> involve reinventing the wheel?
> 
> 

Its *very* ugly, but im pretty sure you can make it look prettier.

import htmlentitydefs as entity

s = u"? and many more..."
t = ""
for i in s:
     if ord(i) in entity.codepoint2name:
         name = entity.codepoint2name.get(ord(i))
         entityCode = entity.name2codepoint.get(name)
         t +="&#" + str(entityCode)
     else:
         t += i
print t

Hope this helps.

Adonis


From jeremy+complangpython at jeremysanders.net  Wed Jan 10 11:13:12 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Wed, 10 Jan 2007 16:13:12 +0000
Subject: maximum number of threads
References: <mailman.2531.1168438769.32031.python-list@python.org>
Message-ID: <eo33ao$okl$1@gemini.csx.cam.ac.uk>

Jean-Paul Calderone wrote:

> Indeed you are correct.  The actual limit you are hitting is the size
> of your address space.  Each thread is allocated 8MB of stack.  382
> threads consumes about 3GB of address space.  Even though most of this
> memory isn't actually allocated, the address space is still used up.  So,
> when you try to create the 383rd thread, the kernel can't find anyplace
> to put its stack.  So you can't create it.

Interesting. That's why I can get over 3000 on my x86-64 machine... Much
more address space.

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From walter at livinglogic.de  Tue Jan 30 11:28:52 2007
From: walter at livinglogic.de (=?ISO-8859-1?Q?Walter_D=F6rwald?=)
Date: Tue, 30 Jan 2007 17:28:52 +0100
Subject: Unicode error handler
In-Reply-To: <epdmae$qps$1@sea.gmane.org>
References: <epdmae$qps$1@sea.gmane.org>
Message-ID: <45BF7244.9080802@livinglogic.de>

Rares Vernica wrote:
> Hi,
> 
> Does anyone know of any Unicode encode/decode error handler that does a 
> better replace job than the default replace error handler?
> 
> For example I have an iso-8859-1 string that has an 'e' with an accent 
> (you know, the French 'e's). When I use s.encode('ascii', 'replace') the 
> 'e' will be replaced with '?'. I would prefer to be replaced with an 'e' 
> even if I know it is not 100% correct.
> 
> If only this letter would be the problem I would do it manually, but 
> there is an entire set of letters that need to be replaced with their 
> closest ascii letter.
> 
> Is there an encode/decode error handler that can replace all the 
> not-ascii letters from iso-8859-1 with their closest ascii letter?

You might try the following:

# -*- coding: iso-8859-1 -*-

import unicodedata, codecs

def transliterate(exc):
	if not isinstance(exc, UnicodeEncodeError):
		raise TypeError("don'ty know how to handle %r" % r)
	return (unicodedata.normalize("NFD", exc.object[exc.start])[:1],
exc.start+1)

codecs.register_error("transliterate", transliterate)

print u"Fr?d?ric Chopin".encode("ascii", "transliterate")

Running this script gives you:
$ python transliterate.py
Frederic Chopin

Hope that helps.

Servus,
   Walter


From robin at NOSPAMreportlab.com  Mon Jan 15 18:30:37 2007
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Mon, 15 Jan 2007 23:30:37 +0000
Subject: ReportLab - Frames - Images
In-Reply-To: <1168898486.300488.264920@a75g2000cwd.googlegroups.com>
References: <1168898486.300488.264920@a75g2000cwd.googlegroups.com>
Message-ID: <45AC0E9D.80104@jessikat.plus.net>

Chuck wrote:
> I have been trying all day to get this to work. My complete code is
> below. I can get my text into the PDF, I can get my image in the PDF.
> What I can't get to work is frames so that the image (logo) appears to
> the right of the text. The image always appears first and then the text
> below on the next line.
> 
> Please help.


you'll get more help at the reportlab users list (see

http://two.pairlist.net/pipermail/reportlab-users/ )

Anyhow I got some output from your script, by making two changes


> *************** CUT ***********************
> from reportlab.pdfgen import *
..........
> 
> 	pdf = SimpleDocTemplate('bill2.pdf', pagesize = letter)
> 
> 	#need a style
> 	normal = ParagraphStyle('normal')
> 
> 	doc.append(Image("pic.jpg", 100, 71))  #Logo
> 
> 	para = Paragraph("Some text1", normal)
> 	doc.append(para)
> 	para = Paragraph("Some text2", normal)
> 	doc.append(para)
> 	para = Paragraph("Some text3", normal)
> 	doc.append(para)
> 	para = Paragraph("Some text4", normal)
> 	doc.append(para)
> 	para = Paragraph(" ", normal)
> 	doc.append(para)
> 	doc.append(HRFlowable(color="black", thickness=3, width="100%"))

change(1)
	doc.append(flowables.HRFlowable(color="black", thickness=3, width="100%"))
> 
> 
> 	pdf.build(doc,bill)

change(2)

	pdf.build(doc)

> 
> run()
> *************************** CUT ***********************************
> 


I also had to change the name of the image to one on my system.

Hope this helps
-- 
Robin Becker


From martin at v.loewis.de  Sun Jan 28 17:05:59 2007
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Sun, 28 Jan 2007 23:05:59 +0100
Subject: Trouble with max() and __cmp__()
In-Reply-To: <1170019291.084041.150780@h3g2000cwc.googlegroups.com>
References: <1170017167.165222.325800@a34g2000cwb.googlegroups.com>
	<slrnerq4ek.56n.wojciech_mula@cat.tac>
	<1170019291.084041.150780@h3g2000cwc.googlegroups.com>
Message-ID: <45BD1E47.2080704@v.loewis.de>

Thomas Nelson schrieb:
> On Jan 28, 3:13 pm, Wojciech Mu?a 
> <wojciech_m... at poczta.null.onet.pl.invalid> wrote:
>> Define method __gt__.
> 
> This works, thanks.  I was a little surprised though. is __cmp__ used 
> by any builtin functions?

It is used by max() if the object doesn't implement __gt__.

Regards,
Martin


From ptmcg at austin.rr._bogus_.com  Fri Jan 12 09:40:21 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 12 Jan 2007 08:40:21 -0600
Subject: How much slower is dict indexing vs. list indexing?
References: <1168555253.601611.258600@k58g2000hse.googlegroups.com>
	<mailman.2606.1168556128.32031.python-list@python.org>
	<1168611039.720278.13430@s34g2000cwa.googlegroups.com>
Message-ID: <45a79dd5$0$7646$4c368faf@roadrunner.com>

"Emin" <emin.shopper at gmail.com> wrote in message 
news:1168611039.720278.13430 at s34g2000cwa.googlegroups.com...
> On Jan 11, 5:53 pm, Steve Holden <s... at holdenweb.com> wrote:
>>
>> What technique were you thinking of to look up the cached index values
>> in Python, just as a matter of curiosity? Storing them in a dict? It
>> would be hard to think of a faster way ... ;-)
>
> I didn't have anything fancy in mind. I was just wondering whether it
> makes sense to replace a block of code like
>
> data = {'a' : 1, 'b' :2, 'c' : 3}
> for i in someLargeList:
>   for name in ['a','b','c']:
>      result.append(data[name])
>
> with somthing like
>
> data = {'a' : 1, 'b' :2, 'c' : 3}
> dataValues = [data[k] for k in ['a','b','c']
> for i in someLargeList:
>   for index in [0,1,2]:
>      result.append(dataValues[index])
>

[Your as-posted code doesn't run, you are missing a trailing ']' in your 
list comprehension. ]

So what you want is this?
1. Get the values from the data dict in order of their key, ['a','b','c'] 
(which is not the same as getting the data.values() list, which is in 
unpredictable order)
2. For every element in some larger list, append each of the elements in 
order from step 1 to some other result list.

First of all, realize that:
>   for index in [0,1,2]:
>      result.append(dataValues[index])
is the same as
    result.extend(dataValues)
assuming that dataValues has exactly 3 elements in it.

Second, why are you iterating over someLargeList?  You are doing nothing 
with i, and neither the data dict nor the dataValues list changes as you 
iterate.

This will do the job more quickly, I should think:

data = {'a' : 1, 'b' :2, 'c' : 3}
dataValues = [data[k] for k in ['a','b','c']]
result.extend( dataValues * len(someLargeList) )

-- Paul




From martin at v.loewis.de  Wed Jan  3 10:43:03 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 03 Jan 2007 16:43:03 +0100
Subject: Why does Python never add itself to the Windows path?
In-Reply-To: <1167543262.361311.123700@v33g2000cwv.googlegroups.com>
References: <1167009405.771413.122790@i12g2000cwa.googlegroups.com>
	<1167543262.361311.123700@v33g2000cwv.googlegroups.com>
Message-ID: <459BCF07.6080302@v.loewis.de>

vbgunz schrieb:
> I don't understand what all the fuss is about. Add a single page to the
> installer and on it, have 3 radio buttons. The choices could be "add to
> path (recommended)", "add to path with version", "do not add to path
> (not recommended)".

Please submit a patch to sf.net/projects/python that does so.

Regards,
Martin


From istvan.albert at gmail.com  Thu Jan 11 09:18:05 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: 11 Jan 2007 06:18:05 -0800
Subject: Need startup suggestions for writing a MSA viewer GUI in python
References: <eo2uhr$ffn$1@news.lysator.liu.se>
Message-ID: <1168525085.580490.76860@i39g2000hsf.googlegroups.com>


Joel Hedlund wrote:

> ideas from you people to get me going in the right direction. Despite my
> GUI n00b-ness I need to get it good and usable with an intuitive look
> and feel.

UI design requires a different skillset than programming. It can be a
very frustrating and thankless task as well. It is incomparably easier
to see the flaws in existing interfaces than correcting them (or even
creating the said interface). Make sure to start with something simple,
and learn that way.

I would also recommend that you implement something novel, there are
many existing MSA viewers and it won't be easy to improve on them. Do
something that adds new value and people will be willing to expend
effort to use it.

i.



From hg at nospam.org  Thu Jan 18 01:25:24 2007
From: hg at nospam.org (hg)
Date: Thu, 18 Jan 2007 07:25:24 +0100
Subject: what can be used in a signal handler 
Message-ID: <3zKrh.30692$sE7.26486@newsfe21.lga>

Hi,

I posted an equivalent question earlier ... but am still not sure:

I currently (under Linux) have a program that uses Queue.put (raw_input(''))
in a signal handler and Queue.get() in the main/only thread.

It works but I want to know if it is legal / what type of synchro API I have
the right to use in a signal handler.

Regards,

hg



From ptmcg at austin.rr._bogus_.com  Tue Jan  9 01:45:56 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 9 Jan 2007 00:45:56 -0600
Subject: Colons, indentation and reformatting. (2)
References: <1168323368.592642.314130@i15g2000cwa.googlegroups.com>
Message-ID: <45a33a24$0$7658$4c368faf@roadrunner.com>

"Paddy" <paddy3118 at netscape.net> wrote in message 
news:1168323368.592642.314130 at i15g2000cwa.googlegroups.com...
>I was just perusing a Wikipedia entry on the "off side rule" at
> http://en.wikipedia.org/wiki/Off-side_rule .
> It says that the colon in Python is purely for readability, and cites
> our FAQ entry
> http://www.python.org/doc/faq/general.html#why-are-colons-required-fo...
> .
> However, near the top of the Alternatives section, it states that for C
> type, curly braces using languages:
>  "An advantage of this is that program code can be automatically
> reformatted and neatly indented without fear of the block structure
> changing".
>
> Thinking about it a little, it seems that a colon followed by
> non-indented code that has just been pasted in could also be used by a
> Python-aware editor as a flag to re-indent the pasted code.
>
> Tell me it is not so, or I will be editing the Wikipedia page I think.
>
> - Paddy.
>
No, the ambiguity comes in when you have a nested construct within another 
nested construct. Here is some (fake) code where all the indentation was 
lost after pasting through a badly-behaved newsreader (this is NOT real 
code, I know that it wont really run, I'm just trying to demonstrate the 
indentation issue):

while x:
a = 100
if b > 3:
a += 1
b += 1

Here are some valid indented versions:

while x:
    a = 100
if b > 3:
    a += 1
b += 1

while x:
    a = 100
    if b > 3:
        a += 1
        b += 1

while x:
    a = 100
    if b > 3:
        a += 1
    b += 1

while x:
    a = 100
    if b > 3:
        a += 1
b += 1

The colons alone are not sufficient to tell us which is correct.

-- Paul




From arkanes at gmail.com  Wed Jan 24 10:32:40 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 24 Jan 2007 09:32:40 -0600
Subject: My python programs need a GUI, wxPython or PyQt4?
In-Reply-To: <mEJth.20273$bH4.2768@tornado.fastwebnet.it>
References: <ep60jp$63v$1@aioe.org> <ep64ic$epi$1@aioe.org>
	<45b69f63$0$24463$88260bb3@free.teranews.com>
	<mEJth.20273$bH4.2768@tornado.fastwebnet.it>
Message-ID: <4866bea60701240732j469de8b1u12a5a6ff7961a68b@mail.gmail.com>

On 1/24/07, Giovanni Bajo <noway at ask.me> wrote:
> On 24/01/2007 1.45, Joshua J. Kugler wrote:
>
> >> I've downloaded both the wxPython and the PyQt4 package, and by the
> >> first impression I must say that the PyQt4 system had a very
> >> compelling presentation. From what I can understand from the feedback
> >> I've gotten so far is that the wxPython is a better choice when it
> >> comes to compability (with linux), and it's free even if I want to
> >> create applications and sell them.
> >> So, from what I understand I will have to go with PyQt4 since (from
> >> my understanding):
> >> 1. I will not sell the applications I'm working with since they will
> >> only be used by the internal QA at a computer game company.
> >
> > Even that is getting on shaky ground, at least according to Troll Tech.
> > See: http://www.trolltech.com/developer/knowledgebase/190/  So, write it
> > for internal use, and put up for distribution on your personal web site
> > (pending company approval, of course).
>
> That page is legal babble, trying to trick you into buying (or making your
> boss buy) a commercial license. The Qt Open Source edition *IS* GPL and thus
> it falls under all the normal GPL clauses and uses, irrespective of what
> Trolltech may or may not think.
>
> For instance, see this FAQ:
> http://www.gnu.org/licenses/gpl-faq.html#GPLRequireSourcePostedPublic
>
> which makes pretty clear that a "company"/"organization" is basically the same
> of an "individual". "Releasing a software within a company for internal usage"
> is by no means the same of "releasing it to the public". Basically, for what
> the GPL is concerned, it is *not* a "release" or a "distribution" at all.
>

I should point out that the FSFs position in this regard is not
supported by copyright law and that the fact that Trolltech takes a
different position is something that you should consider strongly. If
the FSFs position were true, there would be no need for per-seat
licensing of commercial software (because internal distribution
wouldn't be). US copyright law does not draw a distinction between
"internal distribution" and any other kind, and I'm not aware of any
case law that does so either. This distinction is also not codified in
the GPL itself anywhere, so it's not a necessary condition of the
license - it is an interpretation by the FSF and that is all.

> Thus, it is well possible to write internal GPL software, using the Qt Open
> Source library, and to release/distribute/use it *ONLY* internally. Also, it
> should be made clear that a company can of course relicense its own
> proprietary libraries as GPL for internal usage only, so that they can be
> linked to other GPL libraries "legally". For instance, in the case of Daniel
> and his game company, they can link their proprietary game code to PyQt4 (Open
> source edition) to produce an internal tool, like a level editor, which would
> then fall under the GPL. If and only if they were to release that tool to the
> public (either for free or for sale), they would have to either go GPL and
> release full source code (include the parts of their game code linked to it),
> or buy a Qt commercial license.
>
> [[ Another page of similar babble is the one where they try to convince you
> that you cannot use the Qt Open Source edition to develop a software, and then
> buy the commercial edition only the day before you want to release it as non
> open-source. I can't even understand how they can even try to support such a
> nonsense position. You're free to develop your software for years as GPL
> without distributing it, and then relicense your own code whenever you want.
> They're obviously just trying to scare people. ]]
> --

Trolltech can do this because they won't sell you a commercial license
if they think you've been using the GPL version to develop. It's a
practical limitation, not a legal one.


From gagsl-py at yahoo.com.ar  Fri Jan 26 22:33:54 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 27 Jan 2007 00:33:54 -0300
Subject: Problem embedding the Python interpreter and importing
	win32extensions
References: <OF3B0F680E.702A5F55-ON8525726F.0065766F-8525726F.0066AF6D@is002023.gdls.com>
Message-ID: <epeh7k$nok$3@sea.gmane.org>

<paroutyj at gdls.com> escribi? en el mensaje 
news:OF3B0F680E.702A5F55-ON8525726F.0065766F-8525726F.0066AF6D at is002023.gdls.com...

> I am using python 2.2.3, because I am using some dSpace software
> (controldesk/automationdesk) that is based upon that version of python. I
> have some pre-compiled python modules that come with the dspace
> applications. I am pretty sure that those modules use win32com or
> pythoncom. I want to use those modules from a C/C++ application or DLL via
> an embedded interpreter. I can make it work, but it only works once. I get
> an error trying to import those modules again, even after uninitializing
> the interpreter (Py_Initialize) and re-initializing it (Py_Uninitialize).
> I thought may be using a new sub-interpreter would help but it doesn't so
> now I have no idea what I could try. Any ideas?

Unfortunately there is no way to uninitialize an extension module (no 
"unload(module)" exists). So Py_Uninitialize doesn't fully reset the 
environment. Try to avoid that, initialize the interpreter just once, and 
uninitialize it only at the end of the application.

-- 
Gabriel Genellina 




From vinay_sajip at yahoo.co.uk  Fri Jan 19 16:32:50 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: 19 Jan 2007 13:32:50 -0800
Subject: My first try using logger didn't work. Why?
References: <1169221734.071338.107190@11g2000cwr.googlegroups.com>
	<1169224835.820468.316040@v45g2000cwv.googlegroups.com>
	<1169233154.076956.231540@q2g2000cwa.googlegroups.com>
	<1169233925.571841.75480@a75g2000cwd.googlegroups.com>
Message-ID: <1169242370.384356.156340@11g2000cwr.googlegroups.com>

CedricCicada at gmail.com wrote:

> Vinay (or anybody else),
>
> Well, now that logging is working, how do I stop it from working?
>
> I'm developing in PythonWin.  When I run my test script, I get one
> message.  When I run it a second time, I get two, a third time gets me
> three, and so on.
>
> I feel like the Sorceror's Apprentice!
>
> Rob

The way to avoid this is to only call addHandler() once in your script.
PythonWin imports logging and keeps it in memory (something that
wouldn't happen if you ran the script repeatedly from the
command-line), so adding a handler every time results in multiple
handlers logging to the same event sink (e.g. NT Event Log).

So you need to use a flag to indicate whether initialisation has
already happened once, and avoid doing it again. I'm not sure of the
best way of doing this, since I don't know exactly how your app is set
up: if there's no more natural way, you could get a Logger instance and
see if it has any handlers added, before creating a new one and adding
it. This could be done by checking len(logger.handlers) == 0 for that
logger.

Best regards,


Vinay Sajip



From igouy at yahoo.com  Sat Jan 20 13:55:11 2007
From: igouy at yahoo.com (Isaac Gouy)
Date: 20 Jan 2007 10:55:11 -0800
Subject: Py 2.5 on Language Shootout
In-Reply-To: <1169275613.093797.67320@v45g2000cwv.googlegroups.com>
References: <1169242255.023147.310570@38g2000cwa.googlegroups.com>
	<1169258423.824108.228810@s34g2000cwa.googlegroups.com>
	<1169265192.891496.194550@q2g2000cwa.googlegroups.com>
	<1169275613.093797.67320@v45g2000cwv.googlegroups.com>
Message-ID: <1169319310.996003.147970@38g2000cwa.googlegroups.com>


pgarrone at acay.com.au wrote:
> Isaac Gouy wrote:
> > pgarrone at acay.com.au wrote:
> > > Alioth is a great site for selecting the language in which to implement
> > > primitives. Usually it's C.
> >
> > And for selecting a language for which you might need to implement
> > primitives in C :-)
>
> Well if you like C so much, just do it in C. ":-)"

iirc I've never written a program in C or C++ (although I may have
fixed one or two that someone else wrote).


>
> >
> > >
> > > Two of the alioth benchmarks, Partial-sums and Spectral-norm, could be
> > > done using Numarray, or would be done with Numarray if most of the
> > > program was in Python and there was a need to implement a similar
> > > numerical procedure. The speed would be up near the compiled language
> > > benchmarks. However the specific wording of these benchmarks prohibits
> > > this approach. Spectral-norm must pretend the dataset is infinite, and
> > > Partial-sums has to be implemented in a simple dumb loop.
> >
> > And we wouldn't use a na?ve recursive algorithm to find fibonnaci
> > numbers ... unless we were interested in recursion for its own sake.
> >
> > Maybe the author of spectral-norm was interested in function calls.
> > Maybe the author of partial-sums was interested in simple dumb loops
> > and simple dumb Math.
>
> I am not disputing this. I think you take my point though.

I'm confident in my ability to misunderstood the point someone intended
to make - I think your point is some variation on 'we wouldn't write
the program like that' '"real-world" programs aren't like that'.


>
> >
> >
> > > Looking over the benchmarks, one gains the impression that Python is a
> > > slow language.
> >
> > What does that even mean - a slow language?
> >
>
> The alioth benchmarks provide a set of numbers by which
> languages may be compared.

Unless we notice that sometimes there's more than one language
implementation for some languages; unless we notice that sometimes
there's more than one program for the same language implementation.
(Unless we read the bold text on the homepage.)


>
> >
> > > My first serious Python programming exercise involved converting a 900
> > > line Bash Shell program to a 500 line Python program, with a speedup
> > > factor of 17. Using Python allowed an OO structure and advanced
> > > containers, meaning the program was more maintainable and portable,
> > > which were the main aims of the exercise. The speedup was a surprising
> > > and welcome side benefit. I think it was mosly because the Python
> > > byte-code interpreter is probably an order of magnitude faster than
> > > Bash's direct interpretation, and because in Python system calls to
> > > recurse directories and create symbolic links were not forked to
> > > separate processes. In fact I would guess that the overall speed of the
> > > Python program would be little less than a C program, given that most
> > > of the time would be spent in system calls.
> >
> > /I would guess/
>
> I don't have the time, or interest, to recode it in C to find out.
> In reality the choice would be C++ because of OO and STL.
> Perhaps traversing and linking a tree containing about 1000 files would
> not
> take a full second. I might be wrong. All i know is, its a lot faster
> than Bash.
>
> >
> > > Its almost possible to make a large Python program arbitrarily fast by
> > > profiling it and implementing slow bits as primitives. Size is probably
> > > of greater concern.
> >
> > We could read that simply as - /it's not possible/ to make a large
> > Python program arbitrarily fast. Is that what you meant?
>
> No. I meant that if my Python program is too big in terms of its
> execution memory
> requirements, then that would be a difficult issue to deal with. Rather
> than
> optimizing execution hotspots, I might have to use another language.
> 
> Cheers,
>  P.S. Alioth is a great site.



From tundra at tundraware.com  Tue Jan  9 19:25:10 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Tue, 09 Jan 2007 18:25:10 -0600
Subject: tkinter Ignoring Certain Key Presses?
Message-ID: <8cod74-a361.ln1@eskimo.tundraware.com>

I am having trouble getting tkinter to recognize the following key presses-
it seems to be ignoring them alltogether:

Alt F1-F10: FreeBSD 4.x console running XFree86 and cygwin/X (current) connected
             to same machine.  Works on cygwin/X local to Windows machine and
             native Windows.

Ctl 1-5: FreeBSD, Cygwin/X (local or connected to FreeBSD), Windows - i.e.
          Does not seem to work anywhere.

Ideas anyone?
-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From fdelente at mail.cpod.fr  Fri Jan 26 12:08:03 2007
From: fdelente at mail.cpod.fr (Fabrice DELENTE)
Date: 26 Jan 2007 17:08:03 GMT
Subject: python+ncurses: I can't display accents
Message-ID: <45ba3573$0$16171$426a34cc@news.free.fr>


Hello.

I'm trying to display french characters (? -- that's e grave -- or ? --
agrave) in python 2.5, with the ncurses wrapper that comes it, and I can't.
My locale is set correctly (fr_FR.iso885915), and my terminal (rxvt-unicode)
is able to display those chars.

What am I missing?

Thanks.

-- 
Fabrice DELENTE


From akhavr at kds.com.ua  Tue Jan 16 08:28:41 2007
From: akhavr at kds.com.ua (Andrey Khavryuchenko)
Date: Tue, 16 Jan 2007 15:28:41 +0200
Subject: html + javascript automations = [mechanize + ?? ] or something
	else?
References: <1168920755.599905.97250@a75g2000cwd.googlegroups.com>
	<m3lkk3dznr.fsf@netmaster.kds.com.ua>
	<513oovF1ib4g4U1@mid.uni-berlin.de>
Message-ID: <m34pqrdrsm.fsf@netmaster.kds.com.ua>

Diez,

"DBR" == Diez B Roggisch wrote:

 >> Up to my knowledge, there no way to test javascript but to fire up a
 >> browser.
 >> 
 >> So, you might check Selenium (http://www.openqa.org/selenium/) and its
 >> python module.

 DBR> No use in that, as to be remote-controlled by python, selenium must be run
 DBR> on the server-site itself, due to JS security model restrictions.

Sorry, missed 'spider' word in the original post.

-- 
Andrey V Khavryuchenko            
Software Development Company http://www.kds.com.ua/


From codecraig at gmail.com  Tue Jan 16 11:19:19 2007
From: codecraig at gmail.com (abcd)
Date: 16 Jan 2007 08:19:19 -0800
Subject: Search Queue
In-Reply-To: <1168962673.664083.146220@38g2000cwa.googlegroups.com>
References: <1168960945.787822.286690@s34g2000cwa.googlegroups.com>
	<1168962673.664083.146220@38g2000cwa.googlegroups.com>
Message-ID: <1168964356.125262.45110@v45g2000cwv.googlegroups.com>

Yea basically I need Queue like functionality with the ability to
search for a particular instance in it.  I guess I could just use a
list and search it as needed.

Thanks.



From liam_jones at yahoo.com  Wed Jan 10 10:22:46 2007
From: liam_jones at yahoo.com (liam_jones at yahoo.com)
Date: 10 Jan 2007 07:22:46 -0800
Subject: Using Excel With Python
Message-ID: <1168442566.323237.152740@i39g2000hsf.googlegroups.com>

I'm very new to Python, well IronPython to precise, and have been
having problems when using Excel.

The problem I'm having is the closing of my Excel object. I'm able to
successfully quit the Excel Application that I create, but when I open
a Workbook in the Application I can't successfully Quit Excel (by this
I mean I can quit it, but the Excel process isn't getting killed and I
have to manually go this through Task Manager).

I've given a sample of code below to hopefully make things clearer.
I've then given all of the information I think might be useful (sorry
if I've gone over the top!).


import System
import clr
from System.Data import *
from System.Web import *
from System.Web.UI import *
from clr import *

clr.AddReference("Microsoft.Office.Interop.Word")
clr.AddReference("Microsoft.Office.Interop.Excel")
clr.AddReference("Microsoft.Office.Interop.PowerPoint")
clr.AddReference("Office")

from Microsoft.Office.Interop.Word import ApplicationClass as
WordApplication
from Microsoft.Office.Interop.Excel import ApplicationClass as
ExcelApplication
from Microsoft.Office.Interop.PowerPoint import ApplicationClass as
PowerPointApplication
from Microsoft.Office.Interop.Word import WdReplace
from Microsoft.Office.Interop.Excel import XlCellType
from Microsoft.Office.Interop.Excel import XlSearchDirection
from System.Type import Missing
from System import GC

missing = Missing
FileLocation = "C:\\test.xls"

ExcelApp = ExcelApplication()
workbook= None

workbook = ExcelApp.Workbooks.Open(FileLocation, missing, missing,
missing, missing, missing, missing, missing, missing, missing, missing,
missing, missing, missing, missing)

workbook.Save()
workbook.Close(SaveChanges=0)

ExcelApp.Quit()

workbook = None
ExcelApp = None

GC.Collect()
GC.WaitForPendingFinalizers()


I've simpilised the code by taking all of my Workbook processing from
it and the problem is still occurring. As I said above if I don't
create the workbook, then ExcelApp closes as expected (there are no
stray processes).

I've read many articles and postings over the last few days regarding
this, but have had no luck with anything I've seen, examples of this
are now given.

I've tried adding the below code, but with no luck.

ExcelApp.ActiveWorkbook.Save()
ExcelApp.ActiveWorkbook.Close(SaveChanges=0)
ExcelApp.Workbooks.Close()

I've also tried the below (again with no luck).

System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook)
System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp)

And, I've also tried the following (again with no luck!).

del(workbook)
del(excelApp)

It may seem strange using the Garbage Collector (well I wouldn't have
thought about using it here), but it was something that I read about
using for code written in C#. I've tried the code in C# (what I
normally write in) and all works fine, the only real difference is that
I'm setting the objects to NULL in C# and None here in IronPython -
Does this make a difference, is there something else I should be
setting it to? The Workbook object HAS to be set to NULL in C#, it's
then picked up by the Garbage Collector and the task disappears from
the Task Manager.

I did think of killing the actual EXCEL.EXE process at the end of my
code, but there might be several versions of the containing application
running on the same box, so I can't kill all of the Excel processes.

As I said above, I'm sorry if I've gone over the top in my description.
Any ideas or pointers would be greatly appreciated as I'm now going
round in circles.

Thanks in advance.


Rgds
Liam



From mensanator at aol.com  Tue Jan  9 01:42:04 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: 8 Jan 2007 22:42:04 -0800
Subject: Colons, indentation and reformatting. (2)
In-Reply-To: <1168323368.592642.314130@i15g2000cwa.googlegroups.com>
References: <1168323368.592642.314130@i15g2000cwa.googlegroups.com>
Message-ID: <1168324924.666258.80030@42g2000cwt.googlegroups.com>


Paddy wrote:
> I was just perusing a Wikipedia entry on the "off side rule" at
> http://en.wikipedia.org/wiki/Off-side_rule .
> It says that the colon in Python is purely for readability, and cites
> our FAQ entry
> http://www.python.org/doc/faq/general.html#why-are-colons-required-fo...
>  .
> However, near the top of the Alternatives section, it states that for C
> type, curly braces using languages:
>   "An advantage of this is that program code can be automatically
> reformatted and neatly indented without fear of the block structure
> changing".
>
> Thinking about it a little, it seems that a colon followed by
> non-indented code that has just been pasted in could also be used by a
> Python-aware editor as a flag to re-indent the pasted code.

How would you re-indent this?

if x>0: print x


>
> Tell me it is not so, or I will be editing the Wikipedia page I think.
> 
> - Paddy.



From petercable at gmail.com  Sun Jan 14 09:48:17 2007
From: petercable at gmail.com (petercable at gmail.com)
Date: 14 Jan 2007 06:48:17 -0800
Subject: template engine
In-Reply-To: <pan.2007.01.13.18.29.24.499240@gmail.com>
References: <pan.2007.01.13.18.29.24.499240@gmail.com>
Message-ID: <1168786097.581896.281030@q2g2000cwa.googlegroups.com>

> <html>
>  <head>
>   <title>$title</title>
>  </head>
>  <body>
>  #if user
>   hello $user/name
>  #else
>   hello guest
>  #endif
>  </body>
> </html>

This example code would work in cheetah with only 2 changes...

www.cheetahtemplate.org

Pete



From roland.hedberg at adm.umu.se  Wed Jan  3 06:22:07 2007
From: roland.hedberg at adm.umu.se (Roland Hedberg)
Date: Wed, 03 Jan 2007 12:22:07 +0100
Subject: import order or cross import
In-Reply-To: <z8Lmh.44$jr6.10@read3.inet.fi>
References: <mailman.2236.1167814387.32031.python-list@python.org>
	<z8Lmh.44$jr6.10@read3.inet.fi>
Message-ID: <459B91DF.6040807@adm.umu.se>

Jussi Salmela wrote:
> Roland Hedberg kirjoitti:

>> I'm having a bit of a problem with import.
>>
>> I'm writing a marshalling system that based on a specification will
>> create one or more files containing mostly class definitions.

> Maybe I'm missing something, but why is the class BaseColor in file 
> ONE.py and not in TWO.py?

This has to do with the how the specifications that the marshallings
system works with are structured. And it is therefor not something I can
control.

-- Roland


From steven.bethard at gmail.com  Wed Jan 17 14:07:38 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 17 Jan 2007 12:07:38 -0700
Subject: A note on heapq module
In-Reply-To: <slrneqs4vp.b4s.apardon@rcpc42.vub.ac.be>
References: <1168968284.777451.170710@m58g2000cwm.googlegroups.com>
	<slrneqs4vp.b4s.apardon@rcpc42.vub.ac.be>
Message-ID: <4Yidnf9NFKFm7jPYnZ2dnUVZ_u3inZ2d@comcast.com>

Antoon Pardon wrote:
> For me, your class has the same drawback as the heappush, heappop
> procedurers: no way to specify a comparision function.

Agreed.  I'd love to see something like ``Heap(key=my_key_func)``.

STeVe


From deets at nospam.web.de  Fri Jan 19 06:07:46 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 19 Jan 2007 12:07:46 +0100
Subject: Why this script can work?
References: <mailman.2891.1169189508.32031.python-list@python.org>
	<51bjskF1jbnhrU1@mid.uni-berlin.de>
	<mailman.2896.1169204076.32031.python-list@python.org>
Message-ID: <51bn42F1jn1paU2@mid.uni-berlin.de>

Jm lists wrote:

> Thanks for all the helps.
> I'm not habitual for this usage of 'else',other languages seem don't
> support this syntax.
> i.g,writting the codes below by Perl would get an error:

I personally consider this part of python also somewhat obscure. But I just
don't use it and don't bother.

Diez


From frank at chagford.com  Tue Jan  9 02:14:54 2007
From: frank at chagford.com (Frank Millman)
Date: 8 Jan 2007 23:14:54 -0800
Subject: Recommendations (or best practices) to define functions (or
	methods)
In-Reply-To: <50gqeoF1dnbdqU1@mid.uni-berlin.de>
References: <1168219279.578866.217580@s80g2000cwa.googlegroups.com>
	<50ehtmF1fh46iU1@mid.uni-berlin.de>
	<1168262998.765702.38760@i15g2000cwa.googlegroups.com>
	<50gqeoF1dnbdqU1@mid.uni-berlin.de>
Message-ID: <1168326894.875890.174350@i15g2000cwa.googlegroups.com>


Diez B. Roggisch wrote:
>
> If you don't handle the exceptions, exactly what you seem to want will
> happen - you will see the interpreter stop, and why.
>
> All you did was to take the unpythonic (and un-javaic and un-C#ic) road
> to transform an exception to a returncode. But that has nothing to do
> with actually _dealing_ with the error. Instead, it just makes it more
> likely that you _don't_ deal with it, as a return-code evaluation might
> be more easily forgotten, and turn out with a program that will be
> error-prone, as it continues to run even when the preconditions for
> pieces of code aren't met anymore.
>

I absolutely agree with this. I will describe my particular experience,
in the hope that it will make it clear to vizcayno just how important
this is.

My app does a lot of database/user interaction. I read a row from the
database, display it to the user, allow the user to change the value of
various columns, and write it back again.

I had a routine which validated whether the user input was acceptable
based on various business rules. If the input was good, it would update
the internal value of the column and return True, else it would not
update the value and return False. I would check the return code and,
if False, display an error message and reprompt the user for input.
What could go wrong with that?

Well, during the execution of the program, I also update the values of
various columns programatically. I call the same routine, but I did not
check the return code, as it would add a lot of extra checks, and as it
was program generated it would always pass a valid value.

This was true 99.9% of the time, but occasionally, due to a program
error, I would pass an invalid value. The validation routine correctly
did not update the internal value, and returned False, but as I did not
check this I continued merrily on my way. Later on when I found that
the value had not changed, it took me a long time to trace the error.

I suffered like this for quite a long time before the light bulb went
off, based on a thread on c.l.py. Now I do it like this.

The validation routine performs the same function, but instead of
returning True/False, it raises ValueError if the check fails. Where I
previously tested the return code, I now have a try/except clause,
which does the same as before.

The big difference is, what happens if I programmatically pass an
invalid value? Where before, the error would pass silently, now my
program aborts, with the traceback, which is exactly what I want.

Frank Millman



From seandavi at gmail.com  Thu Jan 11 07:27:06 2007
From: seandavi at gmail.com (Sean Davis)
Date: 11 Jan 2007 04:27:06 -0800
Subject: Read from database, write to another database, simultaneously
In-Reply-To: <9ihph.72$fo1.64@newsfe03.lga>
References: <1168468649.437848.311800@o58g2000hsb.googlegroups.com>
	<50l9dlF1fuc1sU1@mid.individual.net> <9ihph.72$fo1.64@newsfe03.lga>
Message-ID: <1168518426.111465.290430@o58g2000hsb.googlegroups.com>



On Jan 10, 9:27 pm, johnf <jfabi... at yolo.com> wrote:
> Bjoern Schliessmann wrote:
> > Sean Davis wrote:
>
> >> The author of one of the python database clients mentioned that
> >> using one thread to retrieve the data from the oracle database and
> >> another to insert the data into postgresql with something like a
> >> pipe between the two threads might make sense, keeping both IO
> >> streams busy.
>
> > IMHO he's wrong. Network interaction is quite slow compared with CPU
> > performance, so there's no gain (maybe even overhead due to thread
> > management and locking stuff). That's true even on multiprocessor
> > machines, not only because there's almost nothing to compute but
> > only IO traffic. CMIIW.
>
> > Using multiplexing, you'll get good results with simple code without
> > the danger of deadlocks. Have a look at asyncore (standard library)
> > or the Twisted framework -- personally, I prefer the latter.
>
> > Regards,
>
> Sean you can't win - everyone has a different idea!  You need to explain
> that oracle has millions of records and it's possible to a pipe open to
> feed the Postgres side.
>
> One thing I didn't get - is this a one time transfer or something that is
> going to happen often.

Yes, some detail about the problem is definitely in order!

We have a collaborator that is going to maintain a large genome
database that is a component of a postgresql database that we currently
maintain.  There are going to be consumers of the oracle data using
both mysql and postgresql.  The oracle database is LARGE with around
100,000,000 rows spread over some 50-70 tables in multiple schemas.
The idea is that as publicly available data (from various datasources
on the web) become available, the oracle team will update the oracle
database, doing all the parsing and necessary data cleanup of the raw
data.  We then want to be able to update postgres with these oracle
data.  So the process may be done only once per month on some tables,
but as often as once a day on others.

As for the specifics, Oracle data is going to be coming in as a DB-API
2 cursor in manageable chunks (and at a relatively slow pace).  On the
postgres loading side, I wanted to use the pscycopg2 copy_from
function, which expects an open file-like object (that has read and
readline functionality) and is quite fast for loading data.  Note the
disconnect here--Oracle is coming in in discrete chunks, while
postgresql is looking for a file object.  I solved this problem by
creating a temporary file as an intermediary, but why wait for Oracle
to finish dumping data when I can potentially be loading into postgres
at the same time that the data is coming in?  So, I am actually looking
for a solution to this problem that doesn't require an intermediate
file and allows simultaneous reading and writing, with the caveat that
the data cannot all be read into memory simultaneously, so will need to
be buffered.

I hope that clarifies things.

Thanks,
Sean



From steve at REMOVE.THIS.cybersource.com.au  Fri Jan 19 07:00:45 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 19 Jan 2007 23:00:45 +1100
Subject: Determining when a file is an Open Office Document
References: <eop5ci$et5$1@solaris.cc.vt.edu>
	<mailman.2886.1169169738.32031.python-list@python.org>
Message-ID: <pan.2007.01.19.12.00.44.879748@REMOVE.THIS.cybersource.com.au>

On Fri, 19 Jan 2007 12:22:04 +1100, Ben Finney wrote:

> tubby <tubby at bandaheart.com> writes:
> 
>> Silly question, but here goes... what's a good way to determine when
>> a file is an Open Office document? I could look at the file
>> extension, but it seems there would be a better way.
> 
> Yes, the name of a file may be useful for communicating with humans
> about that file's intended use, but is a lousy, unreliable way to make
> a definite statement about the actual contents of the file.
> 
> The Unix 'file' command determines the type of a file by its contents,
> not its name. This functionality is essentially a database of "magic"
> byte patterns mapping to file types, 

Ah, another lousy, unreliable way to make a definite statement about the
actual contents of a file. Looking at magic bytes inside a file is hardly
bullet-proof (although file seems to be moderately reliable in practice,
at least under Linux).

Simple example: is the file consisting of two bytes "x09x0A" meant to be a
text file with a tab and a newline, or a binary file consisting of a
single two-byte int? There's no way to tell just from the contents.
It's a circular problem: to be sure what the file is ("it's a two-byte
int") one has to understand the contents ("the integer 2305") -- but you
can only understand the contents if you know what the file is.

There are only two ways out of this vicious circle: 

(1) Have the creator of the file unambiguously label it. Some file systems
associate file-type metadata to files (e.g. Classic Apple Macintosh did
that), but sadly the main file systems in use today do not.

(2) Make an educated guess from various heuristics and conventions. The
old DOS 8.3 naming system is one such convention, and modern operating
systems tend to follow it. The Unix "file" utilities database of magic
bytes is such a heuristic.


-- 
Steven.



From sjmachin at lexicon.net  Tue Jan  9 19:08:25 2007
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 10 Jan 2007 11:08:25 +1100
Subject: pyExcelerator big integer values
In-Reply-To: <1168349446.381187.65810@11g2000cwr.googlegroups.com>
References: <1168349446.381187.65810@11g2000cwr.googlegroups.com>
Message-ID: <45a42e7c@news.eftel.com>

On Jan 10, 12:30 am, "Gacha" <gatis.toms... at gmail.com> wrote:
 > I use pyExcelerator to import some data from xml file. One column
 > contains integer values like:
 > 4750456000708
 > 4750456000715
 > 4750456000333

I think you must mean "xls", not "xml".

Those are integers only in the mathematical sense. The value of each 
number cell in an XLS file is treated as a 64-bit floating point number. 
How do you know that they are whole numbers? What you see on-screen with 
Excel etc is not necessarily what you've got. If you format your column 
with 0 decimal places, 4750456000708.123 will show as 4750456000708

However, whether they are whole numbers or not, you still have a problem 
on the Python side:

 > ...
 > But when I do import the pyExcelerator converts them to something like
 > this:
 > 4.7504560002e+12
 > 4.7504560007e+12
 > 4.7504560007e+12
 > 4.7504560003e+12

No it doesn't. It converts the XLS file data to Python float type -- 
64-bit floating point numbers. There is no loss of precision.

What you are seeing are different visual presentations of the *same* 
object. Perhaps this will explain:

| >>> for x in (4750456000708.0, 4750456000708.123):
| ...     print x, str(x), repr(x)
| ...
| 4.75045600071e+012 4.75045600071e+012 4750456000708.0
| 4.75045600071e+012 4.75045600071e+012 4750456000708.123
| >>>

 >
 > How I understand it's because the integer value is too big.

A 12-digit integer is too big for what?

 > If the type
 > of the items was string, then all would be fine, but I can't control
 > the file content.
 >
 > The question is, how can I import the integers in normal format.

The answer is, there is no such thing as "normal format". Normality, 
like beauty, is in the eye of the beholder. You have a value, how you 
format it for display depends on your purpose. If what you want is to 
see the most precise representation of what you've got, then use repr().

HTH,
John


From tjreedy at udel.edu  Thu Jan 11 02:30:02 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 11 Jan 2007 02:30:02 -0500
Subject: Urgent Openings with the World's Leading Software Company !!!
References: <1168499359.596195.286240@77g2000hsv.googlegroups.com>
Message-ID: <eo4p1n$ssd$1@sea.gmane.org>

(cc'ed)

"Software Hiring" <vamsi.hr.rec at gmail.com> wrote
<an off-topic job announcement that make no mention of wanting Python 
programmers>

Hi Vamsi.

Recruiting for Microsoft gives you no extra right to spam comp.lang.python 
with off-topic messages.  There are thousands of other software groups that 
might like to do the same but with a couple of exceptions a year, they all 
desist for the greater common good.  Please do likewise.

tjr

ps.  A Microsoft recruiter using gmail is a puzzle, but that is a different 
off-topic issue. 





From could.net at gmail.com  Sun Jan  7 04:05:55 2007
From: could.net at gmail.com (Frank Potter)
Date: 7 Jan 2007 01:05:55 -0800
Subject: where is python on linux?
Message-ID: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>

I installed fedora core 6 and it has python installed.
But the question is, where is the executable python file?
I can't find it so I come here for help.
I want to config pydev for eclipse and I need to know where the
ececutable python file is.
Thank you!



From s.mientki at id.umcn.nl  Wed Jan 31 10:44:11 2007
From: s.mientki at id.umcn.nl (stef)
Date: Wed, 31 Jan 2007 16:44:11 +0100
Subject: another newbie question: why should you use "*args" ?
In-Reply-To: <mailman.3346.1170254361.32031.python-list@python.org>
References: <e1f8c$45c08065$83aef404$7421@news1.tudelft.nl>
	<mailman.3346.1170254361.32031.python-list@python.org>
Message-ID: <4b4a3$45c0b94c$83aef404$20934@news1.tudelft.nl>

Eugene Antimirov wrote:
> stef wrote:
>
>> # method 2
>>     def chunk_plot(self, list):
>>         for i in range ( len(list) ):
>>              .... do something
>
>
> And one note more. Just to be more pythonic you shouldn't use form 
> range(len(blabla)). Instead use:
>
> for i in list:
> ....blabla...
>
>
I would love that,
but please tell me how (I need an integer counter for something else too):

def chunk_plot(*args):
    if len(args) == 1:  list = args[0]
    else:               list = args
 
    color = ['g','r','b','y','m']
    plot ( list[0], color[0])
    hold (True)
    for i in range  (  1,  len(list)  ):
         plot  (  list[i],  color[i]  )



cheers,
Stef


From raedfarid at gmail.com  Fri Jan 19 20:37:46 2007
From: raedfarid at gmail.com (Raed)
Date: 19 Jan 2007 17:37:46 -0800
Subject: nice one
Message-ID: <1169257066.102313.287240@11g2000cwr.googlegroups.com>

Take a break and try this cool game, this test is apporved by Peugeot
for car parking


http://www.pixelswall.com/Download/peugeot/peugeot.html

Anton
www.pixelswall.com



From ggg at zzz.it  Wed Jan 31 12:05:14 2007
From: ggg at zzz.it (deelan)
Date: Wed, 31 Jan 2007 18:05:14 +0100
Subject: subway
In-Reply-To: <mailman.3351.1170259362.32031.python-list@python.org>
References: <mailman.3351.1170259362.32031.python-list@python.org>
Message-ID: <3%3wh.17848$K8.7787@news.edisontel.com>

Daniel Nogradi wrote:
> Does anyone know what has happened to the codebase of the subway
> project? It seems the whole project has been shut down leaving no
> trace of the code on net but I would be very happy to see it,
> apparently it had some cool features that would be fun to look at.
> Does anyone have access to the code and/or is willing to make it
> publically available?

Try:
<http://www.gosubway.org/install/>


-- 
d.


From bignose+hates-spam at benfinney.id.au  Fri Jan 19 20:39:40 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 20 Jan 2007 12:39:40 +1100
Subject: OT Annoying Habits
References: <2BBAEE949D384D40A2B851287ADB6A4304595A9C@eugsrv400.psc.pscnet.com>
	<2BBAEE949D384D40A2B851287ADB6A4304595A9C@eugsrv400.psc.psc net.com>
	<7.0.1.0.0.20070119205257.033b9310@yahoo.com.ar>
Message-ID: <87k5zi4gtf.fsf@benfinney.id.au>

Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:

> At Friday 19/1/2007 18:43, Carroll, Barry wrote:
>
> >Secondly, can someone point me to the Standard Usenet Convention
> >that mandates against top-posting.  This is not sarcasm; I would
> >really like to see it.
>
> There are some guidelines, like RFC 1855 (not a real standard, or
> enforced in any way):

They *are* enforced: by social convention. In other words, they're
codified recordings of behaviour the society prefers. To the extent
that's true, they are enforced by that society.

-- 
 \       "I met my girlfriend in Macy's; she was buying clothes, and I |
  `\        was putting Slinkies on the escalators."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From mattheww at chiark.greenend.org.uk  Wed Jan 24 13:24:05 2007
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 24 Jan 2007 18:24:05 +0000 (GMT)
Subject: Thoughts on using isinstance
References: <1169642310.421573.129420@j27g2000cwj.googlegroups.com>
	<1169647934.219682.144390@j27g2000cwj.googlegroups.com>
	<mailman.3087.1169652310.32031.python-list@python.org>
	<1169656371.689791.216360@v33g2000cwv.googlegroups.com>
Message-ID: <zHg*rKEBr@news.chiark.greenend.org.uk>

abcd <codecraig at gmail.com> wrote:
> Well my example function was simply taking a string and printing, but
> most of my cases would be expecting a list, dictionary or some other
> custom object.  Still propose not to validate the type of data being
> passed in?


There are many people here who will indeed suggest that you're still
best off not validating.

There are various points to consider:

 - Not adding the validation code saves a certain amount of effort.

 - Not adding the validation code avoids one source of possible bugs.

 - Not adding the validation code can make your code more readable, in
   that there's that much less uninteresting code for your readers to
   skip before they get to the meat.

 - Adding the validation code can make your code more readable, in that
   it can be clearer to the readers what kind of values are being
   handled.

 - If you validate, you can raise an exception from the start of your
   function with a fairly explicit message. If you don't validate,
   you're likely to end up with an exception whose message is something
   like 'iteration over non-sequence', and it might be raised from some
   function nested several levels deeper in.

   The latter can be harder for the user of your function to debug (in
   particular, it may not be easy to see that the problem was an invalid
   parameter to your function rather than a bug in your function itself,
   or corrupt data elsewhere in the system).

 - If you don't validate, your function will accept anything that
   behaves sufficiently like a list/dictionary/custom-object for its
   purposes.

   You may consider this an advantage or a disadvantage. To some extent
   it depends on the circumstances in which the function is used: if
   someone passes a not-quite-a-file (say) to a function expecting a
   file, is it more likely that this is because of a subtle bug that
   they'll be pleased to learn about early, or that they wanted the
   function to 'do the obvious thing' with it?

 - In particular, suppose your function expects a list and someone
   passes a string when they should have passed a list containing only
   that string. If you don't validate, the function is likely to process
   the string the same way as it would process a list containing a
   number of single-character strings.

   This might well lead to your program apparently completing
   successfully but giving the wrong result (which is usually the kind
   of error you most want to avoid).

 - If the function is going to be maintained together with its callers
   (rather than being part of the public interface to a library, say),
   then validation code is less likely to get in the way, because it
   should be easy to relax the checks if that turns out to be
   convenient.


-M-



From gagsl-py at yahoo.com.ar  Thu Jan  4 21:02:16 2007
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 04 Jan 2007 23:02:16 -0300
Subject: pow() works but sqrt() not!?
In-Reply-To: <eniuf8$cq4v$1@zam602.zam.kfa-juelich.de>
References: <enicv3$cmoq$1@zam602.zam.kfa-juelich.de>
	<1167899693.759071.51450@31g2000cwt.googlegroups.com>
	<enig9a$cncb$1@zam602.zam.kfa-juelich.de>
	<mailman.2282.1167913096.32031.python-list@python.org>
	<eniuf8$cq4v$1@zam602.zam.kfa-juelich.de>
Message-ID: <7.0.1.0.0.20070104225605.038f7d40@yahoo.com.ar>

At Thursday 4/1/2007 10:12, siggi wrote:

>Thanks for the explanation. I am astonished what an interpreted language is
>able to do!

Python is as interpreted as Java. Its numerical capabilities are more 
or less independent of this fact, I'd say.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
__________________________________________________ 
Pregunt?. Respond?. Descubr?. 
Todo lo que quer?as saber, y lo que ni imaginabas, 
est? en Yahoo! Respuestas (Beta). 
?Probalo ya! 
http://www.yahoo.com.ar/respuestas 



From Barry.Carroll at psc.com  Wed Jan 17 14:34:39 2007
From: Barry.Carroll at psc.com (Carroll, Barry)
Date: Wed, 17 Jan 2007 11:34:39 -0800
Subject: *POLL* How many sheeple believe in the 911 fairy tale and
	willingto accept an Orwellian doublespeak and enslavement world ?
Message-ID: <2BBAEE949D384D40A2B851287ADB6A4304595A82@eugsrv400.psc.pscnet.com>


> -----Original Message-----
> From: st911 at rock.com [mailto:st911 at rock.com]
> Sent: Wednesday, January 17, 2007 11:12 AM
> To: python-list at python.org
> Subject: Re: *POLL* How many sheeple believe in the 911 fairy tale and
> willingto accept an Orwellian doublespeak and enslavement world ?
> 
> 
> David Bostwick wrote:
> > In article <1169058752.659674.6680 at s34g2000cwa.googlegroups.com>,
> "Robert Hicks" <sigzero at gmail.com> wrote:
> > >Please, none of the real facts points to anything else except what
> > >actually happened. Two planes hit two towers and they came down.
> > >
> >
> > You're talking to the wind.  This is a conspiracy precisely because
> people
> > deny the crackpots.  Denial of their "evidence" proves that there is
a
> > coverup.
> 
> Quite the contrary. A million dollar reward was posted to come with a
> consistent
> explanation of the SERIOUS anomalies involved on that day. Professor
> Steven
> Jones research on Thermate is an EYE OPENER. He is a BRILLIANT
> physicists.
> 
> > Logic is not involved, only belief that doesn't respond to
dissenting
> evidence.
> 
> Indeed, the 19 hijacker theory is a fairy tale based on illogical
> forensic investigation.
> As for dissent, Bush is on video record to utter, "Lets not tolerate
> any conspiracy theories."
> The video is floating on the internet for you to see if you had the IQ
> to search for it.
> 

Ladies and Gentlemen:

PLEASE take this discussion to a more appropriate forum.  There are many

forums where people will be happy to debate this: physics, firefighting,
metallurgy, geopolitics, etc.  This forum is about the Python
programming language.  Let's keep it that way.  

Regards,
 
Barry
barry.carroll at psc.com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed




From nmm1 at cus.cam.ac.uk  Thu Jan 11 05:24:53 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 11 Jan 2007 10:24:53 GMT
Subject: Maths error
References: <mailman.2448.1168293199.32031.python-list@python.org>
	<50fudtF1g1nplU1@mid.individual.net>
	<envur1$rq1$1@gemini.csx.cam.ac.uk>
	<mailman.2480.1168350033.32031.python-list@python.org>
	<Xns98B384E126F4Ctim111one@216.196.97.136>
	<eo0mjf$i4h$1@gemini.csx.cam.ac.uk>
	<Xns98B3A00749D6tim111one@216.196.97.136>
	<eo2c3l$5v2$1@gemini.csx.cam.ac.uk>
	<Xns98B4E769834AAtim111one@216.196.97.136>
Message-ID: <eo539l$t3b$1@gemini.csx.cam.ac.uk>


In article <Xns98B4E769834AAtim111one at 216.196.97.136>,
Tim Peters <tim.one at comcast.net> writes:
|> 
|> Sure.  Possibly even most.  Short of writing a long & gentle tutorial, 
|> can that be improved?  Alas, most people wouldn't read that either <0.5 
|> wink>.

Yes.  Improved wording would be only slightly longer, and it is never
appropriate to omit all negative aspects.  The truth, the whole truth
and nothing but the truth :-)

|> Worse, I expect most people have no real idea of that there's a possible 
|> difference between internal and external representations.  This is often 
|> given as a selling point for decimal arithmetic:  it's WYSIWYG in ways 
|> binary fp can't be (short of inventing power-of-2 fp representations for 
|> I/O, which few people would use).

Right.  Another case when none of the problems show up on dinky little
examples but do in real code :-(

|> > A lot of very well-respected numerical analysts said that larger bases
|> > led to a faster build-up of error (independent of the precision).  My
|> > limited investigations indicated that there was SOME truth in that,
|> > but it wasn't a major matter; I never say the matter settled
|> > definitively.
|> 
|> My point was that 28 decimal digits of precision is far greater than 
|> supplied even by 64-bit binary floats today (let alone the smaller sizes 
|> in most-common use back in the 60s and 70s).  "Pollution" of low-order 
|> bits is far less of a real concern when there are some number of low-
|> order bits you don't care about at all.

Yes, but that wasn't their point.  It was that in (say) iterative
algorithms, the error builds up by a factor of the base at every step.
If it wasn't for the fact that errors build up, almost all programs
could ignore numerical analysis and still get reliable answers!

Actually, my (limited) investigations indicated that such an error
build-up was extremely rare - I could achieve it only in VERY artificial
programs.  But I did find that the errors built up faster for higher
bases, so that a reasonable rule of thumb is that 28 digits with a decimal
base was comparable to (say) 80 bits with a binary base.

And, IN GENERAL, programs won't be using 128-bit IEEE representations.
Given Python's overheads, there is no reason not to, unless the hardware
is catastrophically slower (which is plausible).

|> If you know a < b, doing
|> 
|>     c = a + (b-a)/2
|> 
|> instead of
|> 
|>     c = (a+b)/2
|> 
|> at least guarantees (ignoring possible overflow) a <= c <= b.  As shown 
|> last time, it's not even always the case that (x+x)/2 == x in decimal fp 
|> (or in any fp base > 2, for that matter).

Yes.  Back in the days before binary floating-point started to dominate,
we taught that as a matter of routine, but it has not been taught to
all users of floating-point for a couple of decades.  Indeed, a lot of
modern programmers regard having to distort simple expressions in that
way as anathema.

It isn't a major issue, because our experience from then is that it is
both teachable and practical, but it IS a way in which any base above
2 is significantly worse than base 2.


Regards,
Nick Maclaren.


From ptmcg at austin.rr._bogus_.com  Tue Jan  9 06:24:29 2007
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 9 Jan 2007 05:24:29 -0600
Subject: Colons, indentation and reformatting. (2)
References: <1168323368.592642.314130@i15g2000cwa.googlegroups.com>
	<45a33a24$0$7658$4c368faf@roadrunner.com>
	<1168327796.187713.107530@38g2000cwa.googlegroups.com>
Message-ID: <45a37b6d$0$5767$4c368faf@roadrunner.com>

"Paddy" <paddy3118 at netscape.net> wrote in message 
news:1168327796.187713.107530 at 38g2000cwa.googlegroups.com...
>
> If this is not
> the case then the user should be asked wether to re-indent the copy
> block to be equal to, or de-dented w.r.t. the paste line indent prior
> to pasting.
>

How would the user know this?  Every dedent is ambiguous, since there is no 
punctuation to indicate it.

-- Paul 




From inq1ltd at verizon.net  Sun Jan  7 12:06:47 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sun, 07 Jan 2007 12:06:47 -0500
Subject: where is python on linux?
In-Reply-To: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
References: <1168160755.253030.132260@i15g2000cwa.googlegroups.com>
Message-ID: <200701071206.48133.inq1ltd@verizon.net>


on linux type:
whereis python 

You should get a list of directories where all of 
python lives.


jim-on-linux

http:\\www.inqvista.com


On Sunday 07 January 2007 04:05, Frank Potter 
wrote:
> I installed fedora core 6 and it has python
> installed. But the question is, where is the
> executable python file? I can't find it so I
> come here for help. I want to config pydev for
> eclipse and I need to know where the ececutable
> python file is.
> Thank you!


From george.sakkis at gmail.com  Wed Jan 17 03:34:54 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 17 Jan 2007 00:34:54 -0800
Subject: How to determine what exceptions a method might raise?
References: <12qq98ijkn5mld8@corp.supernews.com>
	<mailman.2796.1168985816.32031.python-list@python.org>
Message-ID: <1169022894.357383.45950@a75g2000cwd.googlegroups.com>

Ben Finney wrote:

> Ed Jensen <ejensen at visi.com> writes:
>
> > it would be handy if there was something I could do in the
> > interactive interpreter to make it tell me what exceptions the file
> > method might raise (such as IOError).
>
> For what purpose would this be handy? Surely the benefit of the
> interactive interpreter is that you can simply try it out and *see*
> what happens.
>
> But, in case it helps: Any code may raise any exception at any
> time. This is a feature, since it encourages program that are tested
> properly.

That's a silly argument, really, unless perhaps you'd consider a box of
pills that look like M&Ms a 'feature' since it encourages parents to
hide them from their kids. A better answer would be along the lines of
"yes, that would be nice to have but in general it's not possible in a
dynamic language; that's the price you have to pay for leaving the
static typing world".

As for the OP's question, since file is a fixed builtin, I think it
should be possible to know all the possible exceptions that can be
raised; I'm not sure if it's clearly documented though.

George